1f95f3850SWill Newton /* 2f95f3850SWill Newton * Synopsys DesignWare Multimedia Card Interface driver 3f95f3850SWill Newton * (Based on NXP driver for lpc 31xx) 4f95f3850SWill Newton * 5f95f3850SWill Newton * Copyright (C) 2009 NXP Semiconductors 6f95f3850SWill Newton * Copyright (C) 2009, 2010 Imagination Technologies Ltd. 7f95f3850SWill Newton * 8f95f3850SWill Newton * This program is free software; you can redistribute it and/or modify 9f95f3850SWill Newton * it under the terms of the GNU General Public License as published by 10f95f3850SWill Newton * the Free Software Foundation; either version 2 of the License, or 11f95f3850SWill Newton * (at your option) any later version. 12f95f3850SWill Newton */ 13f95f3850SWill Newton 14f95f3850SWill Newton #include <linux/blkdev.h> 15f95f3850SWill Newton #include <linux/clk.h> 16f95f3850SWill Newton #include <linux/debugfs.h> 17f95f3850SWill Newton #include <linux/device.h> 18f95f3850SWill Newton #include <linux/dma-mapping.h> 19f95f3850SWill Newton #include <linux/err.h> 20f95f3850SWill Newton #include <linux/init.h> 21f95f3850SWill Newton #include <linux/interrupt.h> 22f95f3850SWill Newton #include <linux/ioport.h> 23f95f3850SWill Newton #include <linux/module.h> 24f95f3850SWill Newton #include <linux/platform_device.h> 25f95f3850SWill Newton #include <linux/seq_file.h> 26f95f3850SWill Newton #include <linux/slab.h> 27f95f3850SWill Newton #include <linux/stat.h> 28f95f3850SWill Newton #include <linux/delay.h> 29f95f3850SWill Newton #include <linux/irq.h> 30b24c8b26SDoug Anderson #include <linux/mmc/card.h> 31f95f3850SWill Newton #include <linux/mmc/host.h> 32f95f3850SWill Newton #include <linux/mmc/mmc.h> 3301730558SDoug Anderson #include <linux/mmc/sd.h> 3490c2143aSSeungwon Jeon #include <linux/mmc/sdio.h> 35f95f3850SWill Newton #include <linux/mmc/dw_mmc.h> 36f95f3850SWill Newton #include <linux/bitops.h> 37c07946a3SJaehoon Chung #include <linux/regulator/consumer.h> 38c91eab4bSThomas Abraham #include <linux/of.h> 3955a6ceb2SDoug Anderson #include <linux/of_gpio.h> 40bf626e55SZhangfei Gao #include <linux/mmc/slot-gpio.h> 41f95f3850SWill Newton 42f95f3850SWill Newton #include "dw_mmc.h" 43f95f3850SWill Newton 44f95f3850SWill Newton /* Common flag combinations */ 453f7eec62SJaehoon Chung #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DRTO | SDMMC_INT_DCRC | \ 46f95f3850SWill Newton SDMMC_INT_HTO | SDMMC_INT_SBE | \ 477a3c5677SDoug Anderson SDMMC_INT_EBE | SDMMC_INT_HLE) 48f95f3850SWill Newton #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \ 497a3c5677SDoug Anderson SDMMC_INT_RESP_ERR | SDMMC_INT_HLE) 50f95f3850SWill Newton #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \ 517a3c5677SDoug Anderson DW_MCI_CMD_ERROR_FLAGS) 52f95f3850SWill Newton #define DW_MCI_SEND_STATUS 1 53f95f3850SWill Newton #define DW_MCI_RECV_STATUS 2 54f95f3850SWill Newton #define DW_MCI_DMA_THRESHOLD 16 55f95f3850SWill Newton 561f44a2a5SSeungwon Jeon #define DW_MCI_FREQ_MAX 200000000 /* unit: HZ */ 571f44a2a5SSeungwon Jeon #define DW_MCI_FREQ_MIN 400000 /* unit: HZ */ 581f44a2a5SSeungwon Jeon 59fc79a4d6SJoonyoung Shim #define IDMAC_INT_CLR (SDMMC_IDMAC_INT_AI | SDMMC_IDMAC_INT_NI | \ 60fc79a4d6SJoonyoung Shim SDMMC_IDMAC_INT_CES | SDMMC_IDMAC_INT_DU | \ 61fc79a4d6SJoonyoung Shim SDMMC_IDMAC_INT_FBE | SDMMC_IDMAC_INT_RI | \ 62fc79a4d6SJoonyoung Shim SDMMC_IDMAC_INT_TI) 63fc79a4d6SJoonyoung Shim 6469d99fdcSPrabu Thangamuthu struct idmac_desc_64addr { 6569d99fdcSPrabu Thangamuthu u32 des0; /* Control Descriptor */ 6669d99fdcSPrabu Thangamuthu 6769d99fdcSPrabu Thangamuthu u32 des1; /* Reserved */ 6869d99fdcSPrabu Thangamuthu 6969d99fdcSPrabu Thangamuthu u32 des2; /*Buffer sizes */ 7069d99fdcSPrabu Thangamuthu #define IDMAC_64ADDR_SET_BUFFER1_SIZE(d, s) \ 716687c42fSBen Dooks ((d)->des2 = ((d)->des2 & cpu_to_le32(0x03ffe000)) | \ 726687c42fSBen Dooks ((cpu_to_le32(s)) & cpu_to_le32(0x1fff))) 7369d99fdcSPrabu Thangamuthu 7469d99fdcSPrabu Thangamuthu u32 des3; /* Reserved */ 7569d99fdcSPrabu Thangamuthu 7669d99fdcSPrabu Thangamuthu u32 des4; /* Lower 32-bits of Buffer Address Pointer 1*/ 7769d99fdcSPrabu Thangamuthu u32 des5; /* Upper 32-bits of Buffer Address Pointer 1*/ 7869d99fdcSPrabu Thangamuthu 7969d99fdcSPrabu Thangamuthu u32 des6; /* Lower 32-bits of Next Descriptor Address */ 8069d99fdcSPrabu Thangamuthu u32 des7; /* Upper 32-bits of Next Descriptor Address */ 8169d99fdcSPrabu Thangamuthu }; 8269d99fdcSPrabu Thangamuthu 83f95f3850SWill Newton struct idmac_desc { 846687c42fSBen Dooks __le32 des0; /* Control Descriptor */ 85f95f3850SWill Newton #define IDMAC_DES0_DIC BIT(1) 86f95f3850SWill Newton #define IDMAC_DES0_LD BIT(2) 87f95f3850SWill Newton #define IDMAC_DES0_FD BIT(3) 88f95f3850SWill Newton #define IDMAC_DES0_CH BIT(4) 89f95f3850SWill Newton #define IDMAC_DES0_ER BIT(5) 90f95f3850SWill Newton #define IDMAC_DES0_CES BIT(30) 91f95f3850SWill Newton #define IDMAC_DES0_OWN BIT(31) 92f95f3850SWill Newton 936687c42fSBen Dooks __le32 des1; /* Buffer sizes */ 94f95f3850SWill Newton #define IDMAC_SET_BUFFER1_SIZE(d, s) \ 95e5306c3aSBen Dooks ((d)->des1 = ((d)->des1 & cpu_to_le32(0x03ffe000)) | (cpu_to_le32((s) & 0x1fff))) 96f95f3850SWill Newton 976687c42fSBen Dooks __le32 des2; /* buffer 1 physical address */ 98f95f3850SWill Newton 996687c42fSBen Dooks __le32 des3; /* buffer 2 physical address */ 100f95f3850SWill Newton }; 1015959b32eSAlexey Brodkin 1025959b32eSAlexey Brodkin /* Each descriptor can transfer up to 4KB of data in chained mode */ 1035959b32eSAlexey Brodkin #define DW_MCI_DESC_DATA_LENGTH 0x1000 104f95f3850SWill Newton 1053a33a94cSSonny Rao static bool dw_mci_reset(struct dw_mci *host); 106536f6b91SSonny Rao static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset); 1070bdbd0e8SDoug Anderson static int dw_mci_card_busy(struct mmc_host *mmc); 10856f6911cSShawn Lin static int dw_mci_get_cd(struct mmc_host *mmc); 10931bff450SSeungwon Jeon 110f95f3850SWill Newton #if defined(CONFIG_DEBUG_FS) 111f95f3850SWill Newton static int dw_mci_req_show(struct seq_file *s, void *v) 112f95f3850SWill Newton { 113f95f3850SWill Newton struct dw_mci_slot *slot = s->private; 114f95f3850SWill Newton struct mmc_request *mrq; 115f95f3850SWill Newton struct mmc_command *cmd; 116f95f3850SWill Newton struct mmc_command *stop; 117f95f3850SWill Newton struct mmc_data *data; 118f95f3850SWill Newton 119f95f3850SWill Newton /* Make sure we get a consistent snapshot */ 120f95f3850SWill Newton spin_lock_bh(&slot->host->lock); 121f95f3850SWill Newton mrq = slot->mrq; 122f95f3850SWill Newton 123f95f3850SWill Newton if (mrq) { 124f95f3850SWill Newton cmd = mrq->cmd; 125f95f3850SWill Newton data = mrq->data; 126f95f3850SWill Newton stop = mrq->stop; 127f95f3850SWill Newton 128f95f3850SWill Newton if (cmd) 129f95f3850SWill Newton seq_printf(s, 130f95f3850SWill Newton "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 131f95f3850SWill Newton cmd->opcode, cmd->arg, cmd->flags, 132f95f3850SWill Newton cmd->resp[0], cmd->resp[1], cmd->resp[2], 133f95f3850SWill Newton cmd->resp[2], cmd->error); 134f95f3850SWill Newton if (data) 135f95f3850SWill Newton seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", 136f95f3850SWill Newton data->bytes_xfered, data->blocks, 137f95f3850SWill Newton data->blksz, data->flags, data->error); 138f95f3850SWill Newton if (stop) 139f95f3850SWill Newton seq_printf(s, 140f95f3850SWill Newton "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 141f95f3850SWill Newton stop->opcode, stop->arg, stop->flags, 142f95f3850SWill Newton stop->resp[0], stop->resp[1], stop->resp[2], 143f95f3850SWill Newton stop->resp[2], stop->error); 144f95f3850SWill Newton } 145f95f3850SWill Newton 146f95f3850SWill Newton spin_unlock_bh(&slot->host->lock); 147f95f3850SWill Newton 148f95f3850SWill Newton return 0; 149f95f3850SWill Newton } 150f95f3850SWill Newton 151f95f3850SWill Newton static int dw_mci_req_open(struct inode *inode, struct file *file) 152f95f3850SWill Newton { 153f95f3850SWill Newton return single_open(file, dw_mci_req_show, inode->i_private); 154f95f3850SWill Newton } 155f95f3850SWill Newton 156f95f3850SWill Newton static const struct file_operations dw_mci_req_fops = { 157f95f3850SWill Newton .owner = THIS_MODULE, 158f95f3850SWill Newton .open = dw_mci_req_open, 159f95f3850SWill Newton .read = seq_read, 160f95f3850SWill Newton .llseek = seq_lseek, 161f95f3850SWill Newton .release = single_release, 162f95f3850SWill Newton }; 163f95f3850SWill Newton 164f95f3850SWill Newton static int dw_mci_regs_show(struct seq_file *s, void *v) 165f95f3850SWill Newton { 166f95f3850SWill Newton seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); 167f95f3850SWill Newton seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); 168f95f3850SWill Newton seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); 169f95f3850SWill Newton seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); 170f95f3850SWill Newton seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); 171f95f3850SWill Newton seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); 172f95f3850SWill Newton 173f95f3850SWill Newton return 0; 174f95f3850SWill Newton } 175f95f3850SWill Newton 176f95f3850SWill Newton static int dw_mci_regs_open(struct inode *inode, struct file *file) 177f95f3850SWill Newton { 178f95f3850SWill Newton return single_open(file, dw_mci_regs_show, inode->i_private); 179f95f3850SWill Newton } 180f95f3850SWill Newton 181f95f3850SWill Newton static const struct file_operations dw_mci_regs_fops = { 182f95f3850SWill Newton .owner = THIS_MODULE, 183f95f3850SWill Newton .open = dw_mci_regs_open, 184f95f3850SWill Newton .read = seq_read, 185f95f3850SWill Newton .llseek = seq_lseek, 186f95f3850SWill Newton .release = single_release, 187f95f3850SWill Newton }; 188f95f3850SWill Newton 189f95f3850SWill Newton static void dw_mci_init_debugfs(struct dw_mci_slot *slot) 190f95f3850SWill Newton { 191f95f3850SWill Newton struct mmc_host *mmc = slot->mmc; 192f95f3850SWill Newton struct dw_mci *host = slot->host; 193f95f3850SWill Newton struct dentry *root; 194f95f3850SWill Newton struct dentry *node; 195f95f3850SWill Newton 196f95f3850SWill Newton root = mmc->debugfs_root; 197f95f3850SWill Newton if (!root) 198f95f3850SWill Newton return; 199f95f3850SWill Newton 200f95f3850SWill Newton node = debugfs_create_file("regs", S_IRUSR, root, host, 201f95f3850SWill Newton &dw_mci_regs_fops); 202f95f3850SWill Newton if (!node) 203f95f3850SWill Newton goto err; 204f95f3850SWill Newton 205f95f3850SWill Newton node = debugfs_create_file("req", S_IRUSR, root, slot, 206f95f3850SWill Newton &dw_mci_req_fops); 207f95f3850SWill Newton if (!node) 208f95f3850SWill Newton goto err; 209f95f3850SWill Newton 210f95f3850SWill Newton node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); 211f95f3850SWill Newton if (!node) 212f95f3850SWill Newton goto err; 213f95f3850SWill Newton 214f95f3850SWill Newton node = debugfs_create_x32("pending_events", S_IRUSR, root, 215f95f3850SWill Newton (u32 *)&host->pending_events); 216f95f3850SWill Newton if (!node) 217f95f3850SWill Newton goto err; 218f95f3850SWill Newton 219f95f3850SWill Newton node = debugfs_create_x32("completed_events", S_IRUSR, root, 220f95f3850SWill Newton (u32 *)&host->completed_events); 221f95f3850SWill Newton if (!node) 222f95f3850SWill Newton goto err; 223f95f3850SWill Newton 224f95f3850SWill Newton return; 225f95f3850SWill Newton 226f95f3850SWill Newton err: 227f95f3850SWill Newton dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); 228f95f3850SWill Newton } 229f95f3850SWill Newton #endif /* defined(CONFIG_DEBUG_FS) */ 230f95f3850SWill Newton 23101730558SDoug Anderson static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg); 23201730558SDoug Anderson 233f95f3850SWill Newton static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) 234f95f3850SWill Newton { 235f95f3850SWill Newton struct mmc_data *data; 236800d78bfSThomas Abraham struct dw_mci_slot *slot = mmc_priv(mmc); 23701730558SDoug Anderson struct dw_mci *host = slot->host; 238f95f3850SWill Newton u32 cmdr; 239f95f3850SWill Newton 2400e3a22c0SShawn Lin cmd->error = -EINPROGRESS; 241f95f3850SWill Newton cmdr = cmd->opcode; 242f95f3850SWill Newton 24390c2143aSSeungwon Jeon if (cmd->opcode == MMC_STOP_TRANSMISSION || 24490c2143aSSeungwon Jeon cmd->opcode == MMC_GO_IDLE_STATE || 24590c2143aSSeungwon Jeon cmd->opcode == MMC_GO_INACTIVE_STATE || 24690c2143aSSeungwon Jeon (cmd->opcode == SD_IO_RW_DIRECT && 24790c2143aSSeungwon Jeon ((cmd->arg >> 9) & 0x1FFFF) == SDIO_CCCR_ABORT)) 248f95f3850SWill Newton cmdr |= SDMMC_CMD_STOP; 2494a1b27adSJaehoon Chung else if (cmd->opcode != MMC_SEND_STATUS && cmd->data) 250f95f3850SWill Newton cmdr |= SDMMC_CMD_PRV_DAT_WAIT; 251f95f3850SWill Newton 25201730558SDoug Anderson if (cmd->opcode == SD_SWITCH_VOLTAGE) { 25301730558SDoug Anderson u32 clk_en_a; 25401730558SDoug Anderson 25501730558SDoug Anderson /* Special bit makes CMD11 not die */ 25601730558SDoug Anderson cmdr |= SDMMC_CMD_VOLT_SWITCH; 25701730558SDoug Anderson 25801730558SDoug Anderson /* Change state to continue to handle CMD11 weirdness */ 25901730558SDoug Anderson WARN_ON(slot->host->state != STATE_SENDING_CMD); 26001730558SDoug Anderson slot->host->state = STATE_SENDING_CMD11; 26101730558SDoug Anderson 26201730558SDoug Anderson /* 26301730558SDoug Anderson * We need to disable low power mode (automatic clock stop) 26401730558SDoug Anderson * while doing voltage switch so we don't confuse the card, 26501730558SDoug Anderson * since stopping the clock is a specific part of the UHS 26601730558SDoug Anderson * voltage change dance. 26701730558SDoug Anderson * 26801730558SDoug Anderson * Note that low power mode (SDMMC_CLKEN_LOW_PWR) will be 26901730558SDoug Anderson * unconditionally turned back on in dw_mci_setup_bus() if it's 27001730558SDoug Anderson * ever called with a non-zero clock. That shouldn't happen 27101730558SDoug Anderson * until the voltage change is all done. 27201730558SDoug Anderson */ 27301730558SDoug Anderson clk_en_a = mci_readl(host, CLKENA); 27401730558SDoug Anderson clk_en_a &= ~(SDMMC_CLKEN_LOW_PWR << slot->id); 27501730558SDoug Anderson mci_writel(host, CLKENA, clk_en_a); 27601730558SDoug Anderson mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | 27701730558SDoug Anderson SDMMC_CMD_PRV_DAT_WAIT, 0); 27801730558SDoug Anderson } 27901730558SDoug Anderson 280f95f3850SWill Newton if (cmd->flags & MMC_RSP_PRESENT) { 281f95f3850SWill Newton /* We expect a response, so set this bit */ 282f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_EXP; 283f95f3850SWill Newton if (cmd->flags & MMC_RSP_136) 284f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_LONG; 285f95f3850SWill Newton } 286f95f3850SWill Newton 287f95f3850SWill Newton if (cmd->flags & MMC_RSP_CRC) 288f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_CRC; 289f95f3850SWill Newton 290f95f3850SWill Newton data = cmd->data; 291f95f3850SWill Newton if (data) { 292f95f3850SWill Newton cmdr |= SDMMC_CMD_DAT_EXP; 293f95f3850SWill Newton if (data->flags & MMC_DATA_WRITE) 294f95f3850SWill Newton cmdr |= SDMMC_CMD_DAT_WR; 295f95f3850SWill Newton } 296f95f3850SWill Newton 297aaaaeb7aSJaehoon Chung if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &slot->flags)) 298aaaaeb7aSJaehoon Chung cmdr |= SDMMC_CMD_USE_HOLD_REG; 299800d78bfSThomas Abraham 300f95f3850SWill Newton return cmdr; 301f95f3850SWill Newton } 302f95f3850SWill Newton 30390c2143aSSeungwon Jeon static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd) 30490c2143aSSeungwon Jeon { 30590c2143aSSeungwon Jeon struct mmc_command *stop; 30690c2143aSSeungwon Jeon u32 cmdr; 30790c2143aSSeungwon Jeon 30890c2143aSSeungwon Jeon if (!cmd->data) 30990c2143aSSeungwon Jeon return 0; 31090c2143aSSeungwon Jeon 31190c2143aSSeungwon Jeon stop = &host->stop_abort; 31290c2143aSSeungwon Jeon cmdr = cmd->opcode; 31390c2143aSSeungwon Jeon memset(stop, 0, sizeof(struct mmc_command)); 31490c2143aSSeungwon Jeon 31590c2143aSSeungwon Jeon if (cmdr == MMC_READ_SINGLE_BLOCK || 31690c2143aSSeungwon Jeon cmdr == MMC_READ_MULTIPLE_BLOCK || 31790c2143aSSeungwon Jeon cmdr == MMC_WRITE_BLOCK || 3186c2c6506SUlf Hansson cmdr == MMC_WRITE_MULTIPLE_BLOCK || 3196c2c6506SUlf Hansson cmdr == MMC_SEND_TUNING_BLOCK || 3206c2c6506SUlf Hansson cmdr == MMC_SEND_TUNING_BLOCK_HS200) { 32190c2143aSSeungwon Jeon stop->opcode = MMC_STOP_TRANSMISSION; 32290c2143aSSeungwon Jeon stop->arg = 0; 32390c2143aSSeungwon Jeon stop->flags = MMC_RSP_R1B | MMC_CMD_AC; 32490c2143aSSeungwon Jeon } else if (cmdr == SD_IO_RW_EXTENDED) { 32590c2143aSSeungwon Jeon stop->opcode = SD_IO_RW_DIRECT; 32690c2143aSSeungwon Jeon stop->arg |= (1 << 31) | (0 << 28) | (SDIO_CCCR_ABORT << 9) | 32790c2143aSSeungwon Jeon ((cmd->arg >> 28) & 0x7); 32890c2143aSSeungwon Jeon stop->flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; 32990c2143aSSeungwon Jeon } else { 33090c2143aSSeungwon Jeon return 0; 33190c2143aSSeungwon Jeon } 33290c2143aSSeungwon Jeon 33390c2143aSSeungwon Jeon cmdr = stop->opcode | SDMMC_CMD_STOP | 33490c2143aSSeungwon Jeon SDMMC_CMD_RESP_CRC | SDMMC_CMD_RESP_EXP; 33590c2143aSSeungwon Jeon 33690c2143aSSeungwon Jeon return cmdr; 33790c2143aSSeungwon Jeon } 33890c2143aSSeungwon Jeon 3390bdbd0e8SDoug Anderson static void dw_mci_wait_while_busy(struct dw_mci *host, u32 cmd_flags) 3400bdbd0e8SDoug Anderson { 3410bdbd0e8SDoug Anderson unsigned long timeout = jiffies + msecs_to_jiffies(500); 3420bdbd0e8SDoug Anderson 3430bdbd0e8SDoug Anderson /* 3440bdbd0e8SDoug Anderson * Databook says that before issuing a new data transfer command 3450bdbd0e8SDoug Anderson * we need to check to see if the card is busy. Data transfer commands 3460bdbd0e8SDoug Anderson * all have SDMMC_CMD_PRV_DAT_WAIT set, so we'll key off that. 3470bdbd0e8SDoug Anderson * 3480bdbd0e8SDoug Anderson * ...also allow sending for SDMMC_CMD_VOLT_SWITCH where busy is 3490bdbd0e8SDoug Anderson * expected. 3500bdbd0e8SDoug Anderson */ 3510bdbd0e8SDoug Anderson if ((cmd_flags & SDMMC_CMD_PRV_DAT_WAIT) && 3520bdbd0e8SDoug Anderson !(cmd_flags & SDMMC_CMD_VOLT_SWITCH)) { 3530bdbd0e8SDoug Anderson while (mci_readl(host, STATUS) & SDMMC_STATUS_BUSY) { 3540bdbd0e8SDoug Anderson if (time_after(jiffies, timeout)) { 3550bdbd0e8SDoug Anderson /* Command will fail; we'll pass error then */ 3560bdbd0e8SDoug Anderson dev_err(host->dev, "Busy; trying anyway\n"); 3570bdbd0e8SDoug Anderson break; 3580bdbd0e8SDoug Anderson } 3590bdbd0e8SDoug Anderson udelay(10); 3600bdbd0e8SDoug Anderson } 3610bdbd0e8SDoug Anderson } 3620bdbd0e8SDoug Anderson } 3630bdbd0e8SDoug Anderson 364f95f3850SWill Newton static void dw_mci_start_command(struct dw_mci *host, 365f95f3850SWill Newton struct mmc_command *cmd, u32 cmd_flags) 366f95f3850SWill Newton { 367f95f3850SWill Newton host->cmd = cmd; 3684a90920cSThomas Abraham dev_vdbg(host->dev, 369f95f3850SWill Newton "start command: ARGR=0x%08x CMDR=0x%08x\n", 370f95f3850SWill Newton cmd->arg, cmd_flags); 371f95f3850SWill Newton 372f95f3850SWill Newton mci_writel(host, CMDARG, cmd->arg); 3730e3a22c0SShawn Lin wmb(); /* drain writebuffer */ 3740bdbd0e8SDoug Anderson dw_mci_wait_while_busy(host, cmd_flags); 375f95f3850SWill Newton 376f95f3850SWill Newton mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); 377f95f3850SWill Newton } 378f95f3850SWill Newton 37990c2143aSSeungwon Jeon static inline void send_stop_abort(struct dw_mci *host, struct mmc_data *data) 380f95f3850SWill Newton { 38190c2143aSSeungwon Jeon struct mmc_command *stop = data->stop ? data->stop : &host->stop_abort; 3820e3a22c0SShawn Lin 38390c2143aSSeungwon Jeon dw_mci_start_command(host, stop, host->stop_cmdr); 384f95f3850SWill Newton } 385f95f3850SWill Newton 386f95f3850SWill Newton /* DMA interface functions */ 387f95f3850SWill Newton static void dw_mci_stop_dma(struct dw_mci *host) 388f95f3850SWill Newton { 38903e8cb53SJames Hogan if (host->using_dma) { 390f95f3850SWill Newton host->dma_ops->stop(host); 391f95f3850SWill Newton host->dma_ops->cleanup(host); 392aa50f259SSeungwon Jeon } 393aa50f259SSeungwon Jeon 394f95f3850SWill Newton /* Data transfer was stopped by the interrupt handler */ 395f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 396f95f3850SWill Newton } 397f95f3850SWill Newton 3989aa51408SSeungwon Jeon static int dw_mci_get_dma_dir(struct mmc_data *data) 3999aa51408SSeungwon Jeon { 4009aa51408SSeungwon Jeon if (data->flags & MMC_DATA_WRITE) 4019aa51408SSeungwon Jeon return DMA_TO_DEVICE; 4029aa51408SSeungwon Jeon else 4039aa51408SSeungwon Jeon return DMA_FROM_DEVICE; 4049aa51408SSeungwon Jeon } 4059aa51408SSeungwon Jeon 406f95f3850SWill Newton static void dw_mci_dma_cleanup(struct dw_mci *host) 407f95f3850SWill Newton { 408f95f3850SWill Newton struct mmc_data *data = host->data; 409f95f3850SWill Newton 410f95f3850SWill Newton if (data) 4119aa51408SSeungwon Jeon if (!data->host_cookie) 4124a90920cSThomas Abraham dma_unmap_sg(host->dev, 4139aa51408SSeungwon Jeon data->sg, 4149aa51408SSeungwon Jeon data->sg_len, 4159aa51408SSeungwon Jeon dw_mci_get_dma_dir(data)); 416f95f3850SWill Newton } 417f95f3850SWill Newton 4185ce9d961SSeungwon Jeon static void dw_mci_idmac_reset(struct dw_mci *host) 4195ce9d961SSeungwon Jeon { 4205ce9d961SSeungwon Jeon u32 bmod = mci_readl(host, BMOD); 4215ce9d961SSeungwon Jeon /* Software reset of DMA */ 4225ce9d961SSeungwon Jeon bmod |= SDMMC_IDMAC_SWRESET; 4235ce9d961SSeungwon Jeon mci_writel(host, BMOD, bmod); 4245ce9d961SSeungwon Jeon } 4255ce9d961SSeungwon Jeon 426f95f3850SWill Newton static void dw_mci_idmac_stop_dma(struct dw_mci *host) 427f95f3850SWill Newton { 428f95f3850SWill Newton u32 temp; 429f95f3850SWill Newton 430f95f3850SWill Newton /* Disable and reset the IDMAC interface */ 431f95f3850SWill Newton temp = mci_readl(host, CTRL); 432f95f3850SWill Newton temp &= ~SDMMC_CTRL_USE_IDMAC; 433f95f3850SWill Newton temp |= SDMMC_CTRL_DMA_RESET; 434f95f3850SWill Newton mci_writel(host, CTRL, temp); 435f95f3850SWill Newton 436f95f3850SWill Newton /* Stop the IDMAC running */ 437f95f3850SWill Newton temp = mci_readl(host, BMOD); 438a5289a43SJaehoon Chung temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB); 4395ce9d961SSeungwon Jeon temp |= SDMMC_IDMAC_SWRESET; 440f95f3850SWill Newton mci_writel(host, BMOD, temp); 441f95f3850SWill Newton } 442f95f3850SWill Newton 4433fc7eaefSShawn Lin static void dw_mci_dmac_complete_dma(void *arg) 444f95f3850SWill Newton { 4453fc7eaefSShawn Lin struct dw_mci *host = arg; 446f95f3850SWill Newton struct mmc_data *data = host->data; 447f95f3850SWill Newton 4484a90920cSThomas Abraham dev_vdbg(host->dev, "DMA complete\n"); 449f95f3850SWill Newton 4503fc7eaefSShawn Lin if ((host->use_dma == TRANS_MODE_EDMAC) && 4513fc7eaefSShawn Lin data && (data->flags & MMC_DATA_READ)) 4523fc7eaefSShawn Lin /* Invalidate cache after read */ 4533fc7eaefSShawn Lin dma_sync_sg_for_cpu(mmc_dev(host->cur_slot->mmc), 4543fc7eaefSShawn Lin data->sg, 4553fc7eaefSShawn Lin data->sg_len, 4563fc7eaefSShawn Lin DMA_FROM_DEVICE); 4573fc7eaefSShawn Lin 458f95f3850SWill Newton host->dma_ops->cleanup(host); 459f95f3850SWill Newton 460f95f3850SWill Newton /* 461f95f3850SWill Newton * If the card was removed, data will be NULL. No point in trying to 462f95f3850SWill Newton * send the stop command or waiting for NBUSY in this case. 463f95f3850SWill Newton */ 464f95f3850SWill Newton if (data) { 465f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 466f95f3850SWill Newton tasklet_schedule(&host->tasklet); 467f95f3850SWill Newton } 468f95f3850SWill Newton } 469f95f3850SWill Newton 470f95f3850SWill Newton static int dw_mci_idmac_init(struct dw_mci *host) 471f95f3850SWill Newton { 472897b69e7SSeungwon Jeon int i; 473f95f3850SWill Newton 47469d99fdcSPrabu Thangamuthu if (host->dma_64bit_address == 1) { 47569d99fdcSPrabu Thangamuthu struct idmac_desc_64addr *p; 47669d99fdcSPrabu Thangamuthu /* Number of descriptors in the ring buffer */ 47769d99fdcSPrabu Thangamuthu host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc_64addr); 47869d99fdcSPrabu Thangamuthu 47969d99fdcSPrabu Thangamuthu /* Forward link the descriptor list */ 48069d99fdcSPrabu Thangamuthu for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; 48169d99fdcSPrabu Thangamuthu i++, p++) { 48269d99fdcSPrabu Thangamuthu p->des6 = (host->sg_dma + 48369d99fdcSPrabu Thangamuthu (sizeof(struct idmac_desc_64addr) * 48469d99fdcSPrabu Thangamuthu (i + 1))) & 0xffffffff; 48569d99fdcSPrabu Thangamuthu 48669d99fdcSPrabu Thangamuthu p->des7 = (u64)(host->sg_dma + 48769d99fdcSPrabu Thangamuthu (sizeof(struct idmac_desc_64addr) * 48869d99fdcSPrabu Thangamuthu (i + 1))) >> 32; 48969d99fdcSPrabu Thangamuthu /* Initialize reserved and buffer size fields to "0" */ 49069d99fdcSPrabu Thangamuthu p->des1 = 0; 49169d99fdcSPrabu Thangamuthu p->des2 = 0; 49269d99fdcSPrabu Thangamuthu p->des3 = 0; 49369d99fdcSPrabu Thangamuthu } 49469d99fdcSPrabu Thangamuthu 49569d99fdcSPrabu Thangamuthu /* Set the last descriptor as the end-of-ring descriptor */ 49669d99fdcSPrabu Thangamuthu p->des6 = host->sg_dma & 0xffffffff; 49769d99fdcSPrabu Thangamuthu p->des7 = (u64)host->sg_dma >> 32; 49869d99fdcSPrabu Thangamuthu p->des0 = IDMAC_DES0_ER; 49969d99fdcSPrabu Thangamuthu 50069d99fdcSPrabu Thangamuthu } else { 50169d99fdcSPrabu Thangamuthu struct idmac_desc *p; 502f95f3850SWill Newton /* Number of descriptors in the ring buffer */ 503f95f3850SWill Newton host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc); 504f95f3850SWill Newton 505f95f3850SWill Newton /* Forward link the descriptor list */ 5060e3a22c0SShawn Lin for (i = 0, p = host->sg_cpu; 5070e3a22c0SShawn Lin i < host->ring_size - 1; 5080e3a22c0SShawn Lin i++, p++) { 5096687c42fSBen Dooks p->des3 = cpu_to_le32(host->sg_dma + 5106687c42fSBen Dooks (sizeof(struct idmac_desc) * (i + 1))); 5114b244724SZhangfei Gao p->des1 = 0; 5124b244724SZhangfei Gao } 513f95f3850SWill Newton 514f95f3850SWill Newton /* Set the last descriptor as the end-of-ring descriptor */ 5156687c42fSBen Dooks p->des3 = cpu_to_le32(host->sg_dma); 5166687c42fSBen Dooks p->des0 = cpu_to_le32(IDMAC_DES0_ER); 51769d99fdcSPrabu Thangamuthu } 518f95f3850SWill Newton 5195ce9d961SSeungwon Jeon dw_mci_idmac_reset(host); 520141a712aSSeungwon Jeon 52169d99fdcSPrabu Thangamuthu if (host->dma_64bit_address == 1) { 52269d99fdcSPrabu Thangamuthu /* Mask out interrupts - get Tx & Rx complete only */ 52369d99fdcSPrabu Thangamuthu mci_writel(host, IDSTS64, IDMAC_INT_CLR); 52469d99fdcSPrabu Thangamuthu mci_writel(host, IDINTEN64, SDMMC_IDMAC_INT_NI | 52569d99fdcSPrabu Thangamuthu SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); 52669d99fdcSPrabu Thangamuthu 52769d99fdcSPrabu Thangamuthu /* Set the descriptor base address */ 52869d99fdcSPrabu Thangamuthu mci_writel(host, DBADDRL, host->sg_dma & 0xffffffff); 52969d99fdcSPrabu Thangamuthu mci_writel(host, DBADDRU, (u64)host->sg_dma >> 32); 53069d99fdcSPrabu Thangamuthu 53169d99fdcSPrabu Thangamuthu } else { 532f95f3850SWill Newton /* Mask out interrupts - get Tx & Rx complete only */ 533fc79a4d6SJoonyoung Shim mci_writel(host, IDSTS, IDMAC_INT_CLR); 53469d99fdcSPrabu Thangamuthu mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | 53569d99fdcSPrabu Thangamuthu SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); 536f95f3850SWill Newton 537f95f3850SWill Newton /* Set the descriptor base address */ 538f95f3850SWill Newton mci_writel(host, DBADDR, host->sg_dma); 53969d99fdcSPrabu Thangamuthu } 54069d99fdcSPrabu Thangamuthu 541f95f3850SWill Newton return 0; 542f95f3850SWill Newton } 543f95f3850SWill Newton 5443b2a067bSShawn Lin static inline int dw_mci_prepare_desc64(struct dw_mci *host, 5453b2a067bSShawn Lin struct mmc_data *data, 5463b2a067bSShawn Lin unsigned int sg_len) 5473b2a067bSShawn Lin { 5483b2a067bSShawn Lin unsigned int desc_len; 5493b2a067bSShawn Lin struct idmac_desc_64addr *desc_first, *desc_last, *desc; 5503b2a067bSShawn Lin unsigned long timeout; 5513b2a067bSShawn Lin int i; 5523b2a067bSShawn Lin 5533b2a067bSShawn Lin desc_first = desc_last = desc = host->sg_cpu; 5543b2a067bSShawn Lin 5553b2a067bSShawn Lin for (i = 0; i < sg_len; i++) { 5563b2a067bSShawn Lin unsigned int length = sg_dma_len(&data->sg[i]); 5573b2a067bSShawn Lin 5583b2a067bSShawn Lin u64 mem_addr = sg_dma_address(&data->sg[i]); 5593b2a067bSShawn Lin 5603b2a067bSShawn Lin for ( ; length ; desc++) { 5613b2a067bSShawn Lin desc_len = (length <= DW_MCI_DESC_DATA_LENGTH) ? 5623b2a067bSShawn Lin length : DW_MCI_DESC_DATA_LENGTH; 5633b2a067bSShawn Lin 5643b2a067bSShawn Lin length -= desc_len; 5653b2a067bSShawn Lin 5663b2a067bSShawn Lin /* 5673b2a067bSShawn Lin * Wait for the former clear OWN bit operation 5683b2a067bSShawn Lin * of IDMAC to make sure that this descriptor 5693b2a067bSShawn Lin * isn't still owned by IDMAC as IDMAC's write 5703b2a067bSShawn Lin * ops and CPU's read ops are asynchronous. 5713b2a067bSShawn Lin */ 5723b2a067bSShawn Lin timeout = jiffies + msecs_to_jiffies(100); 5733b2a067bSShawn Lin while (readl(&desc->des0) & IDMAC_DES0_OWN) { 5743b2a067bSShawn Lin if (time_after(jiffies, timeout)) 5753b2a067bSShawn Lin goto err_own_bit; 5763b2a067bSShawn Lin udelay(10); 5773b2a067bSShawn Lin } 5783b2a067bSShawn Lin 5793b2a067bSShawn Lin /* 5803b2a067bSShawn Lin * Set the OWN bit and disable interrupts 5813b2a067bSShawn Lin * for this descriptor 5823b2a067bSShawn Lin */ 5833b2a067bSShawn Lin desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | 5843b2a067bSShawn Lin IDMAC_DES0_CH; 5853b2a067bSShawn Lin 5863b2a067bSShawn Lin /* Buffer length */ 5873b2a067bSShawn Lin IDMAC_64ADDR_SET_BUFFER1_SIZE(desc, desc_len); 5883b2a067bSShawn Lin 5893b2a067bSShawn Lin /* Physical address to DMA to/from */ 5903b2a067bSShawn Lin desc->des4 = mem_addr & 0xffffffff; 5913b2a067bSShawn Lin desc->des5 = mem_addr >> 32; 5923b2a067bSShawn Lin 5933b2a067bSShawn Lin /* Update physical address for the next desc */ 5943b2a067bSShawn Lin mem_addr += desc_len; 5953b2a067bSShawn Lin 5963b2a067bSShawn Lin /* Save pointer to the last descriptor */ 5973b2a067bSShawn Lin desc_last = desc; 5983b2a067bSShawn Lin } 5993b2a067bSShawn Lin } 6003b2a067bSShawn Lin 6013b2a067bSShawn Lin /* Set first descriptor */ 6023b2a067bSShawn Lin desc_first->des0 |= IDMAC_DES0_FD; 6033b2a067bSShawn Lin 6043b2a067bSShawn Lin /* Set last descriptor */ 6053b2a067bSShawn Lin desc_last->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); 6063b2a067bSShawn Lin desc_last->des0 |= IDMAC_DES0_LD; 6073b2a067bSShawn Lin 6083b2a067bSShawn Lin return 0; 6093b2a067bSShawn Lin err_own_bit: 6103b2a067bSShawn Lin /* restore the descriptor chain as it's polluted */ 6113b2a067bSShawn Lin dev_dbg(host->dev, "desciptor is still owned by IDMAC.\n"); 6123b2a067bSShawn Lin memset(host->sg_cpu, 0, PAGE_SIZE); 6133b2a067bSShawn Lin dw_mci_idmac_init(host); 6143b2a067bSShawn Lin return -EINVAL; 6153b2a067bSShawn Lin } 6163b2a067bSShawn Lin 6173b2a067bSShawn Lin 6183b2a067bSShawn Lin static inline int dw_mci_prepare_desc32(struct dw_mci *host, 6193b2a067bSShawn Lin struct mmc_data *data, 6203b2a067bSShawn Lin unsigned int sg_len) 6213b2a067bSShawn Lin { 6223b2a067bSShawn Lin unsigned int desc_len; 6233b2a067bSShawn Lin struct idmac_desc *desc_first, *desc_last, *desc; 6243b2a067bSShawn Lin unsigned long timeout; 6253b2a067bSShawn Lin int i; 6263b2a067bSShawn Lin 6273b2a067bSShawn Lin desc_first = desc_last = desc = host->sg_cpu; 6283b2a067bSShawn Lin 6293b2a067bSShawn Lin for (i = 0; i < sg_len; i++) { 6303b2a067bSShawn Lin unsigned int length = sg_dma_len(&data->sg[i]); 6313b2a067bSShawn Lin 6323b2a067bSShawn Lin u32 mem_addr = sg_dma_address(&data->sg[i]); 6333b2a067bSShawn Lin 6343b2a067bSShawn Lin for ( ; length ; desc++) { 6353b2a067bSShawn Lin desc_len = (length <= DW_MCI_DESC_DATA_LENGTH) ? 6363b2a067bSShawn Lin length : DW_MCI_DESC_DATA_LENGTH; 6373b2a067bSShawn Lin 6383b2a067bSShawn Lin length -= desc_len; 6393b2a067bSShawn Lin 6403b2a067bSShawn Lin /* 6413b2a067bSShawn Lin * Wait for the former clear OWN bit operation 6423b2a067bSShawn Lin * of IDMAC to make sure that this descriptor 6433b2a067bSShawn Lin * isn't still owned by IDMAC as IDMAC's write 6443b2a067bSShawn Lin * ops and CPU's read ops are asynchronous. 6453b2a067bSShawn Lin */ 6463b2a067bSShawn Lin timeout = jiffies + msecs_to_jiffies(100); 6473b2a067bSShawn Lin while (readl(&desc->des0) & 6483b2a067bSShawn Lin cpu_to_le32(IDMAC_DES0_OWN)) { 6493b2a067bSShawn Lin if (time_after(jiffies, timeout)) 6503b2a067bSShawn Lin goto err_own_bit; 6513b2a067bSShawn Lin udelay(10); 6523b2a067bSShawn Lin } 6533b2a067bSShawn Lin 6543b2a067bSShawn Lin /* 6553b2a067bSShawn Lin * Set the OWN bit and disable interrupts 6563b2a067bSShawn Lin * for this descriptor 6573b2a067bSShawn Lin */ 6583b2a067bSShawn Lin desc->des0 = cpu_to_le32(IDMAC_DES0_OWN | 6593b2a067bSShawn Lin IDMAC_DES0_DIC | 6603b2a067bSShawn Lin IDMAC_DES0_CH); 6613b2a067bSShawn Lin 6623b2a067bSShawn Lin /* Buffer length */ 6633b2a067bSShawn Lin IDMAC_SET_BUFFER1_SIZE(desc, desc_len); 6643b2a067bSShawn Lin 6653b2a067bSShawn Lin /* Physical address to DMA to/from */ 6663b2a067bSShawn Lin desc->des2 = cpu_to_le32(mem_addr); 6673b2a067bSShawn Lin 6683b2a067bSShawn Lin /* Update physical address for the next desc */ 6693b2a067bSShawn Lin mem_addr += desc_len; 6703b2a067bSShawn Lin 6713b2a067bSShawn Lin /* Save pointer to the last descriptor */ 6723b2a067bSShawn Lin desc_last = desc; 6733b2a067bSShawn Lin } 6743b2a067bSShawn Lin } 6753b2a067bSShawn Lin 6763b2a067bSShawn Lin /* Set first descriptor */ 6773b2a067bSShawn Lin desc_first->des0 |= cpu_to_le32(IDMAC_DES0_FD); 6783b2a067bSShawn Lin 6793b2a067bSShawn Lin /* Set last descriptor */ 6803b2a067bSShawn Lin desc_last->des0 &= cpu_to_le32(~(IDMAC_DES0_CH | 6813b2a067bSShawn Lin IDMAC_DES0_DIC)); 6823b2a067bSShawn Lin desc_last->des0 |= cpu_to_le32(IDMAC_DES0_LD); 6833b2a067bSShawn Lin 6843b2a067bSShawn Lin return 0; 6853b2a067bSShawn Lin err_own_bit: 6863b2a067bSShawn Lin /* restore the descriptor chain as it's polluted */ 6873b2a067bSShawn Lin dev_dbg(host->dev, "desciptor is still owned by IDMAC.\n"); 6883b2a067bSShawn Lin memset(host->sg_cpu, 0, PAGE_SIZE); 6893b2a067bSShawn Lin dw_mci_idmac_init(host); 6903b2a067bSShawn Lin return -EINVAL; 6913b2a067bSShawn Lin } 6923b2a067bSShawn Lin 6933b2a067bSShawn Lin static int dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) 6943b2a067bSShawn Lin { 6953b2a067bSShawn Lin u32 temp; 6963b2a067bSShawn Lin int ret; 6973b2a067bSShawn Lin 6983b2a067bSShawn Lin if (host->dma_64bit_address == 1) 6993b2a067bSShawn Lin ret = dw_mci_prepare_desc64(host, host->data, sg_len); 7003b2a067bSShawn Lin else 7013b2a067bSShawn Lin ret = dw_mci_prepare_desc32(host, host->data, sg_len); 7023b2a067bSShawn Lin 7033b2a067bSShawn Lin if (ret) 7043b2a067bSShawn Lin goto out; 7053b2a067bSShawn Lin 7063b2a067bSShawn Lin /* drain writebuffer */ 7073b2a067bSShawn Lin wmb(); 7083b2a067bSShawn Lin 7093b2a067bSShawn Lin /* Make sure to reset DMA in case we did PIO before this */ 7103b2a067bSShawn Lin dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET); 7113b2a067bSShawn Lin dw_mci_idmac_reset(host); 7123b2a067bSShawn Lin 7133b2a067bSShawn Lin /* Select IDMAC interface */ 7143b2a067bSShawn Lin temp = mci_readl(host, CTRL); 7153b2a067bSShawn Lin temp |= SDMMC_CTRL_USE_IDMAC; 7163b2a067bSShawn Lin mci_writel(host, CTRL, temp); 7173b2a067bSShawn Lin 7183b2a067bSShawn Lin /* drain writebuffer */ 7193b2a067bSShawn Lin wmb(); 7203b2a067bSShawn Lin 7213b2a067bSShawn Lin /* Enable the IDMAC */ 7223b2a067bSShawn Lin temp = mci_readl(host, BMOD); 7233b2a067bSShawn Lin temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB; 7243b2a067bSShawn Lin mci_writel(host, BMOD, temp); 7253b2a067bSShawn Lin 7263b2a067bSShawn Lin /* Start it running */ 7273b2a067bSShawn Lin mci_writel(host, PLDMND, 1); 7283b2a067bSShawn Lin 7293b2a067bSShawn Lin out: 7303b2a067bSShawn Lin return ret; 7313b2a067bSShawn Lin } 7323b2a067bSShawn Lin 7338e2b36eaSArnd Bergmann static const struct dw_mci_dma_ops dw_mci_idmac_ops = { 734885c3e80SSeungwon Jeon .init = dw_mci_idmac_init, 735885c3e80SSeungwon Jeon .start = dw_mci_idmac_start_dma, 736885c3e80SSeungwon Jeon .stop = dw_mci_idmac_stop_dma, 7373fc7eaefSShawn Lin .complete = dw_mci_dmac_complete_dma, 738885c3e80SSeungwon Jeon .cleanup = dw_mci_dma_cleanup, 739885c3e80SSeungwon Jeon }; 7403fc7eaefSShawn Lin 7413fc7eaefSShawn Lin static void dw_mci_edmac_stop_dma(struct dw_mci *host) 7423fc7eaefSShawn Lin { 743ab925a31SShawn Lin dmaengine_terminate_async(host->dms->ch); 7443fc7eaefSShawn Lin } 7453fc7eaefSShawn Lin 7463fc7eaefSShawn Lin static int dw_mci_edmac_start_dma(struct dw_mci *host, 7473fc7eaefSShawn Lin unsigned int sg_len) 7483fc7eaefSShawn Lin { 7493fc7eaefSShawn Lin struct dma_slave_config cfg; 7503fc7eaefSShawn Lin struct dma_async_tx_descriptor *desc = NULL; 7513fc7eaefSShawn Lin struct scatterlist *sgl = host->data->sg; 7523fc7eaefSShawn Lin const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; 7533fc7eaefSShawn Lin u32 sg_elems = host->data->sg_len; 7543fc7eaefSShawn Lin u32 fifoth_val; 7553fc7eaefSShawn Lin u32 fifo_offset = host->fifo_reg - host->regs; 7563fc7eaefSShawn Lin int ret = 0; 7573fc7eaefSShawn Lin 7583fc7eaefSShawn Lin /* Set external dma config: burst size, burst width */ 759260b3164SArnd Bergmann cfg.dst_addr = host->phy_regs + fifo_offset; 7603fc7eaefSShawn Lin cfg.src_addr = cfg.dst_addr; 7613fc7eaefSShawn Lin cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 7623fc7eaefSShawn Lin cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 7633fc7eaefSShawn Lin 7643fc7eaefSShawn Lin /* Match burst msize with external dma config */ 7653fc7eaefSShawn Lin fifoth_val = mci_readl(host, FIFOTH); 7663fc7eaefSShawn Lin cfg.dst_maxburst = mszs[(fifoth_val >> 28) & 0x7]; 7673fc7eaefSShawn Lin cfg.src_maxburst = cfg.dst_maxburst; 7683fc7eaefSShawn Lin 7693fc7eaefSShawn Lin if (host->data->flags & MMC_DATA_WRITE) 7703fc7eaefSShawn Lin cfg.direction = DMA_MEM_TO_DEV; 7713fc7eaefSShawn Lin else 7723fc7eaefSShawn Lin cfg.direction = DMA_DEV_TO_MEM; 7733fc7eaefSShawn Lin 7743fc7eaefSShawn Lin ret = dmaengine_slave_config(host->dms->ch, &cfg); 7753fc7eaefSShawn Lin if (ret) { 7763fc7eaefSShawn Lin dev_err(host->dev, "Failed to config edmac.\n"); 7773fc7eaefSShawn Lin return -EBUSY; 7783fc7eaefSShawn Lin } 7793fc7eaefSShawn Lin 7803fc7eaefSShawn Lin desc = dmaengine_prep_slave_sg(host->dms->ch, sgl, 7813fc7eaefSShawn Lin sg_len, cfg.direction, 7823fc7eaefSShawn Lin DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 7833fc7eaefSShawn Lin if (!desc) { 7843fc7eaefSShawn Lin dev_err(host->dev, "Can't prepare slave sg.\n"); 7853fc7eaefSShawn Lin return -EBUSY; 7863fc7eaefSShawn Lin } 7873fc7eaefSShawn Lin 7883fc7eaefSShawn Lin /* Set dw_mci_dmac_complete_dma as callback */ 7893fc7eaefSShawn Lin desc->callback = dw_mci_dmac_complete_dma; 7903fc7eaefSShawn Lin desc->callback_param = (void *)host; 7913fc7eaefSShawn Lin dmaengine_submit(desc); 7923fc7eaefSShawn Lin 7933fc7eaefSShawn Lin /* Flush cache before write */ 7943fc7eaefSShawn Lin if (host->data->flags & MMC_DATA_WRITE) 7953fc7eaefSShawn Lin dma_sync_sg_for_device(mmc_dev(host->cur_slot->mmc), sgl, 7963fc7eaefSShawn Lin sg_elems, DMA_TO_DEVICE); 7973fc7eaefSShawn Lin 7983fc7eaefSShawn Lin dma_async_issue_pending(host->dms->ch); 7993fc7eaefSShawn Lin 8003fc7eaefSShawn Lin return 0; 8013fc7eaefSShawn Lin } 8023fc7eaefSShawn Lin 8033fc7eaefSShawn Lin static int dw_mci_edmac_init(struct dw_mci *host) 8043fc7eaefSShawn Lin { 8053fc7eaefSShawn Lin /* Request external dma channel */ 8063fc7eaefSShawn Lin host->dms = kzalloc(sizeof(struct dw_mci_dma_slave), GFP_KERNEL); 8073fc7eaefSShawn Lin if (!host->dms) 8083fc7eaefSShawn Lin return -ENOMEM; 8093fc7eaefSShawn Lin 8103fc7eaefSShawn Lin host->dms->ch = dma_request_slave_channel(host->dev, "rx-tx"); 8113fc7eaefSShawn Lin if (!host->dms->ch) { 8124539d36eSDan Carpenter dev_err(host->dev, "Failed to get external DMA channel.\n"); 8133fc7eaefSShawn Lin kfree(host->dms); 8143fc7eaefSShawn Lin host->dms = NULL; 8153fc7eaefSShawn Lin return -ENXIO; 8163fc7eaefSShawn Lin } 8173fc7eaefSShawn Lin 8183fc7eaefSShawn Lin return 0; 8193fc7eaefSShawn Lin } 8203fc7eaefSShawn Lin 8213fc7eaefSShawn Lin static void dw_mci_edmac_exit(struct dw_mci *host) 8223fc7eaefSShawn Lin { 8233fc7eaefSShawn Lin if (host->dms) { 8243fc7eaefSShawn Lin if (host->dms->ch) { 8253fc7eaefSShawn Lin dma_release_channel(host->dms->ch); 8263fc7eaefSShawn Lin host->dms->ch = NULL; 8273fc7eaefSShawn Lin } 8283fc7eaefSShawn Lin kfree(host->dms); 8293fc7eaefSShawn Lin host->dms = NULL; 8303fc7eaefSShawn Lin } 8313fc7eaefSShawn Lin } 8323fc7eaefSShawn Lin 8333fc7eaefSShawn Lin static const struct dw_mci_dma_ops dw_mci_edmac_ops = { 8343fc7eaefSShawn Lin .init = dw_mci_edmac_init, 8353fc7eaefSShawn Lin .exit = dw_mci_edmac_exit, 8363fc7eaefSShawn Lin .start = dw_mci_edmac_start_dma, 8373fc7eaefSShawn Lin .stop = dw_mci_edmac_stop_dma, 8383fc7eaefSShawn Lin .complete = dw_mci_dmac_complete_dma, 8393fc7eaefSShawn Lin .cleanup = dw_mci_dma_cleanup, 8403fc7eaefSShawn Lin }; 841885c3e80SSeungwon Jeon 8429aa51408SSeungwon Jeon static int dw_mci_pre_dma_transfer(struct dw_mci *host, 8439aa51408SSeungwon Jeon struct mmc_data *data, 8449aa51408SSeungwon Jeon bool next) 845f95f3850SWill Newton { 846f95f3850SWill Newton struct scatterlist *sg; 8479aa51408SSeungwon Jeon unsigned int i, sg_len; 848f95f3850SWill Newton 8499aa51408SSeungwon Jeon if (!next && data->host_cookie) 8509aa51408SSeungwon Jeon return data->host_cookie; 851f95f3850SWill Newton 852f95f3850SWill Newton /* 853f95f3850SWill Newton * We don't do DMA on "complex" transfers, i.e. with 854f95f3850SWill Newton * non-word-aligned buffers or lengths. Also, we don't bother 855f95f3850SWill Newton * with all the DMA setup overhead for short transfers. 856f95f3850SWill Newton */ 857f95f3850SWill Newton if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) 858f95f3850SWill Newton return -EINVAL; 8599aa51408SSeungwon Jeon 860f95f3850SWill Newton if (data->blksz & 3) 861f95f3850SWill Newton return -EINVAL; 862f95f3850SWill Newton 863f95f3850SWill Newton for_each_sg(data->sg, sg, data->sg_len, i) { 864f95f3850SWill Newton if (sg->offset & 3 || sg->length & 3) 865f95f3850SWill Newton return -EINVAL; 866f95f3850SWill Newton } 867f95f3850SWill Newton 8684a90920cSThomas Abraham sg_len = dma_map_sg(host->dev, 8699aa51408SSeungwon Jeon data->sg, 8709aa51408SSeungwon Jeon data->sg_len, 8719aa51408SSeungwon Jeon dw_mci_get_dma_dir(data)); 8729aa51408SSeungwon Jeon if (sg_len == 0) 8739aa51408SSeungwon Jeon return -EINVAL; 8749aa51408SSeungwon Jeon 8759aa51408SSeungwon Jeon if (next) 8769aa51408SSeungwon Jeon data->host_cookie = sg_len; 8779aa51408SSeungwon Jeon 8789aa51408SSeungwon Jeon return sg_len; 8799aa51408SSeungwon Jeon } 8809aa51408SSeungwon Jeon 8819aa51408SSeungwon Jeon static void dw_mci_pre_req(struct mmc_host *mmc, 8829aa51408SSeungwon Jeon struct mmc_request *mrq, 8839aa51408SSeungwon Jeon bool is_first_req) 8849aa51408SSeungwon Jeon { 8859aa51408SSeungwon Jeon struct dw_mci_slot *slot = mmc_priv(mmc); 8869aa51408SSeungwon Jeon struct mmc_data *data = mrq->data; 8879aa51408SSeungwon Jeon 8889aa51408SSeungwon Jeon if (!slot->host->use_dma || !data) 8899aa51408SSeungwon Jeon return; 8909aa51408SSeungwon Jeon 8919aa51408SSeungwon Jeon if (data->host_cookie) { 8929aa51408SSeungwon Jeon data->host_cookie = 0; 8939aa51408SSeungwon Jeon return; 8949aa51408SSeungwon Jeon } 8959aa51408SSeungwon Jeon 8969aa51408SSeungwon Jeon if (dw_mci_pre_dma_transfer(slot->host, mrq->data, 1) < 0) 8979aa51408SSeungwon Jeon data->host_cookie = 0; 8989aa51408SSeungwon Jeon } 8999aa51408SSeungwon Jeon 9009aa51408SSeungwon Jeon static void dw_mci_post_req(struct mmc_host *mmc, 9019aa51408SSeungwon Jeon struct mmc_request *mrq, 9029aa51408SSeungwon Jeon int err) 9039aa51408SSeungwon Jeon { 9049aa51408SSeungwon Jeon struct dw_mci_slot *slot = mmc_priv(mmc); 9059aa51408SSeungwon Jeon struct mmc_data *data = mrq->data; 9069aa51408SSeungwon Jeon 9079aa51408SSeungwon Jeon if (!slot->host->use_dma || !data) 9089aa51408SSeungwon Jeon return; 9099aa51408SSeungwon Jeon 9109aa51408SSeungwon Jeon if (data->host_cookie) 9114a90920cSThomas Abraham dma_unmap_sg(slot->host->dev, 9129aa51408SSeungwon Jeon data->sg, 9139aa51408SSeungwon Jeon data->sg_len, 9149aa51408SSeungwon Jeon dw_mci_get_dma_dir(data)); 9159aa51408SSeungwon Jeon data->host_cookie = 0; 9169aa51408SSeungwon Jeon } 9179aa51408SSeungwon Jeon 91852426899SSeungwon Jeon static void dw_mci_adjust_fifoth(struct dw_mci *host, struct mmc_data *data) 91952426899SSeungwon Jeon { 92052426899SSeungwon Jeon unsigned int blksz = data->blksz; 92152426899SSeungwon Jeon const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; 92252426899SSeungwon Jeon u32 fifo_width = 1 << host->data_shift; 92352426899SSeungwon Jeon u32 blksz_depth = blksz / fifo_width, fifoth_val; 92452426899SSeungwon Jeon u32 msize = 0, rx_wmark = 1, tx_wmark, tx_wmark_invers; 9250e3a22c0SShawn Lin int idx = ARRAY_SIZE(mszs) - 1; 92652426899SSeungwon Jeon 9273fc7eaefSShawn Lin /* pio should ship this scenario */ 9283fc7eaefSShawn Lin if (!host->use_dma) 9293fc7eaefSShawn Lin return; 9303fc7eaefSShawn Lin 93152426899SSeungwon Jeon tx_wmark = (host->fifo_depth) / 2; 93252426899SSeungwon Jeon tx_wmark_invers = host->fifo_depth - tx_wmark; 93352426899SSeungwon Jeon 93452426899SSeungwon Jeon /* 93552426899SSeungwon Jeon * MSIZE is '1', 93652426899SSeungwon Jeon * if blksz is not a multiple of the FIFO width 93752426899SSeungwon Jeon */ 93852426899SSeungwon Jeon if (blksz % fifo_width) { 93952426899SSeungwon Jeon msize = 0; 94052426899SSeungwon Jeon rx_wmark = 1; 94152426899SSeungwon Jeon goto done; 94252426899SSeungwon Jeon } 94352426899SSeungwon Jeon 94452426899SSeungwon Jeon do { 94552426899SSeungwon Jeon if (!((blksz_depth % mszs[idx]) || 94652426899SSeungwon Jeon (tx_wmark_invers % mszs[idx]))) { 94752426899SSeungwon Jeon msize = idx; 94852426899SSeungwon Jeon rx_wmark = mszs[idx] - 1; 94952426899SSeungwon Jeon break; 95052426899SSeungwon Jeon } 95152426899SSeungwon Jeon } while (--idx > 0); 95252426899SSeungwon Jeon /* 95352426899SSeungwon Jeon * If idx is '0', it won't be tried 95452426899SSeungwon Jeon * Thus, initial values are uesed 95552426899SSeungwon Jeon */ 95652426899SSeungwon Jeon done: 95752426899SSeungwon Jeon fifoth_val = SDMMC_SET_FIFOTH(msize, rx_wmark, tx_wmark); 95852426899SSeungwon Jeon mci_writel(host, FIFOTH, fifoth_val); 95952426899SSeungwon Jeon } 96052426899SSeungwon Jeon 9617e4bf1bcSJaehoon Chung static void dw_mci_ctrl_thld(struct dw_mci *host, struct mmc_data *data) 962f1d2736cSSeungwon Jeon { 963f1d2736cSSeungwon Jeon unsigned int blksz = data->blksz; 964f1d2736cSSeungwon Jeon u32 blksz_depth, fifo_depth; 965f1d2736cSSeungwon Jeon u16 thld_size; 9667e4bf1bcSJaehoon Chung u8 enable; 967f1d2736cSSeungwon Jeon 96866dfd101SJames Hogan /* 96966dfd101SJames Hogan * CDTHRCTL doesn't exist prior to 240A (in fact that register offset is 97066dfd101SJames Hogan * in the FIFO region, so we really shouldn't access it). 97166dfd101SJames Hogan */ 9727e4bf1bcSJaehoon Chung if (host->verid < DW_MMC_240A || 9737e4bf1bcSJaehoon Chung (host->verid < DW_MMC_280A && data->flags & MMC_DATA_WRITE)) 97466dfd101SJames Hogan return; 97566dfd101SJames Hogan 9767e4bf1bcSJaehoon Chung /* 9777e4bf1bcSJaehoon Chung * Card write Threshold is introduced since 2.80a 9787e4bf1bcSJaehoon Chung * It's used when HS400 mode is enabled. 9797e4bf1bcSJaehoon Chung */ 9807e4bf1bcSJaehoon Chung if (data->flags & MMC_DATA_WRITE && 9817e4bf1bcSJaehoon Chung !(host->timing != MMC_TIMING_MMC_HS400)) 9827e4bf1bcSJaehoon Chung return; 9837e4bf1bcSJaehoon Chung 9847e4bf1bcSJaehoon Chung if (data->flags & MMC_DATA_WRITE) 9857e4bf1bcSJaehoon Chung enable = SDMMC_CARD_WR_THR_EN; 9867e4bf1bcSJaehoon Chung else 9877e4bf1bcSJaehoon Chung enable = SDMMC_CARD_RD_THR_EN; 9887e4bf1bcSJaehoon Chung 989f1d2736cSSeungwon Jeon if (host->timing != MMC_TIMING_MMC_HS200 && 990f1d2736cSSeungwon Jeon host->timing != MMC_TIMING_UHS_SDR104) 991f1d2736cSSeungwon Jeon goto disable; 992f1d2736cSSeungwon Jeon 993f1d2736cSSeungwon Jeon blksz_depth = blksz / (1 << host->data_shift); 994f1d2736cSSeungwon Jeon fifo_depth = host->fifo_depth; 995f1d2736cSSeungwon Jeon 996f1d2736cSSeungwon Jeon if (blksz_depth > fifo_depth) 997f1d2736cSSeungwon Jeon goto disable; 998f1d2736cSSeungwon Jeon 999f1d2736cSSeungwon Jeon /* 1000f1d2736cSSeungwon Jeon * If (blksz_depth) >= (fifo_depth >> 1), should be 'thld_size <= blksz' 1001f1d2736cSSeungwon Jeon * If (blksz_depth) < (fifo_depth >> 1), should be thld_size = blksz 1002f1d2736cSSeungwon Jeon * Currently just choose blksz. 1003f1d2736cSSeungwon Jeon */ 1004f1d2736cSSeungwon Jeon thld_size = blksz; 10057e4bf1bcSJaehoon Chung mci_writel(host, CDTHRCTL, SDMMC_SET_THLD(thld_size, enable)); 1006f1d2736cSSeungwon Jeon return; 1007f1d2736cSSeungwon Jeon 1008f1d2736cSSeungwon Jeon disable: 10097e4bf1bcSJaehoon Chung mci_writel(host, CDTHRCTL, 0); 1010f1d2736cSSeungwon Jeon } 1011f1d2736cSSeungwon Jeon 10129aa51408SSeungwon Jeon static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) 10139aa51408SSeungwon Jeon { 1014f8c58c11SDoug Anderson unsigned long irqflags; 10159aa51408SSeungwon Jeon int sg_len; 10169aa51408SSeungwon Jeon u32 temp; 10179aa51408SSeungwon Jeon 10189aa51408SSeungwon Jeon host->using_dma = 0; 10199aa51408SSeungwon Jeon 10209aa51408SSeungwon Jeon /* If we don't have a channel, we can't do DMA */ 10219aa51408SSeungwon Jeon if (!host->use_dma) 10229aa51408SSeungwon Jeon return -ENODEV; 10239aa51408SSeungwon Jeon 10249aa51408SSeungwon Jeon sg_len = dw_mci_pre_dma_transfer(host, data, 0); 1025a99aa9b9SSeungwon Jeon if (sg_len < 0) { 1026a99aa9b9SSeungwon Jeon host->dma_ops->stop(host); 10279aa51408SSeungwon Jeon return sg_len; 1028a99aa9b9SSeungwon Jeon } 10299aa51408SSeungwon Jeon 103003e8cb53SJames Hogan host->using_dma = 1; 103103e8cb53SJames Hogan 10323fc7eaefSShawn Lin if (host->use_dma == TRANS_MODE_IDMAC) 10334a90920cSThomas Abraham dev_vdbg(host->dev, 1034f95f3850SWill Newton "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", 10353fc7eaefSShawn Lin (unsigned long)host->sg_cpu, 10363fc7eaefSShawn Lin (unsigned long)host->sg_dma, 1037f95f3850SWill Newton sg_len); 1038f95f3850SWill Newton 103952426899SSeungwon Jeon /* 104052426899SSeungwon Jeon * Decide the MSIZE and RX/TX Watermark. 104152426899SSeungwon Jeon * If current block size is same with previous size, 104252426899SSeungwon Jeon * no need to update fifoth. 104352426899SSeungwon Jeon */ 104452426899SSeungwon Jeon if (host->prev_blksz != data->blksz) 104552426899SSeungwon Jeon dw_mci_adjust_fifoth(host, data); 104652426899SSeungwon Jeon 1047f95f3850SWill Newton /* Enable the DMA interface */ 1048f95f3850SWill Newton temp = mci_readl(host, CTRL); 1049f95f3850SWill Newton temp |= SDMMC_CTRL_DMA_ENABLE; 1050f95f3850SWill Newton mci_writel(host, CTRL, temp); 1051f95f3850SWill Newton 1052f95f3850SWill Newton /* Disable RX/TX IRQs, let DMA handle it */ 1053f8c58c11SDoug Anderson spin_lock_irqsave(&host->irq_lock, irqflags); 1054f95f3850SWill Newton temp = mci_readl(host, INTMASK); 1055f95f3850SWill Newton temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); 1056f95f3850SWill Newton mci_writel(host, INTMASK, temp); 1057f8c58c11SDoug Anderson spin_unlock_irqrestore(&host->irq_lock, irqflags); 1058f95f3850SWill Newton 10593fc7eaefSShawn Lin if (host->dma_ops->start(host, sg_len)) { 1060*d12d0cb1SShawn Lin /* We can't do DMA, try PIO for this one */ 1061*d12d0cb1SShawn Lin dev_dbg(host->dev, 1062*d12d0cb1SShawn Lin "%s: fall back to PIO mode for current transfer\n", 1063*d12d0cb1SShawn Lin __func__); 10643fc7eaefSShawn Lin return -ENODEV; 10653fc7eaefSShawn Lin } 1066f95f3850SWill Newton 1067f95f3850SWill Newton return 0; 1068f95f3850SWill Newton } 1069f95f3850SWill Newton 1070f95f3850SWill Newton static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) 1071f95f3850SWill Newton { 1072f8c58c11SDoug Anderson unsigned long irqflags; 10730e3a22c0SShawn Lin int flags = SG_MITER_ATOMIC; 1074f95f3850SWill Newton u32 temp; 1075f95f3850SWill Newton 1076f95f3850SWill Newton data->error = -EINPROGRESS; 1077f95f3850SWill Newton 1078f95f3850SWill Newton WARN_ON(host->data); 1079f95f3850SWill Newton host->sg = NULL; 1080f95f3850SWill Newton host->data = data; 1081f95f3850SWill Newton 10827e4bf1bcSJaehoon Chung if (data->flags & MMC_DATA_READ) 108355c5efbcSJames Hogan host->dir_status = DW_MCI_RECV_STATUS; 10847e4bf1bcSJaehoon Chung else 108555c5efbcSJames Hogan host->dir_status = DW_MCI_SEND_STATUS; 10867e4bf1bcSJaehoon Chung 10877e4bf1bcSJaehoon Chung dw_mci_ctrl_thld(host, data); 108855c5efbcSJames Hogan 1089f95f3850SWill Newton if (dw_mci_submit_data_dma(host, data)) { 1090f9c2a0dcSSeungwon Jeon if (host->data->flags & MMC_DATA_READ) 1091f9c2a0dcSSeungwon Jeon flags |= SG_MITER_TO_SG; 1092f9c2a0dcSSeungwon Jeon else 1093f9c2a0dcSSeungwon Jeon flags |= SG_MITER_FROM_SG; 1094f9c2a0dcSSeungwon Jeon 1095f9c2a0dcSSeungwon Jeon sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); 1096f95f3850SWill Newton host->sg = data->sg; 109734b664a2SJames Hogan host->part_buf_start = 0; 109834b664a2SJames Hogan host->part_buf_count = 0; 1099f95f3850SWill Newton 1100b40af3aaSJames Hogan mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR); 1101f8c58c11SDoug Anderson 1102f8c58c11SDoug Anderson spin_lock_irqsave(&host->irq_lock, irqflags); 1103f95f3850SWill Newton temp = mci_readl(host, INTMASK); 1104f95f3850SWill Newton temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; 1105f95f3850SWill Newton mci_writel(host, INTMASK, temp); 1106f8c58c11SDoug Anderson spin_unlock_irqrestore(&host->irq_lock, irqflags); 1107f95f3850SWill Newton 1108f95f3850SWill Newton temp = mci_readl(host, CTRL); 1109f95f3850SWill Newton temp &= ~SDMMC_CTRL_DMA_ENABLE; 1110f95f3850SWill Newton mci_writel(host, CTRL, temp); 111152426899SSeungwon Jeon 111252426899SSeungwon Jeon /* 111352426899SSeungwon Jeon * Use the initial fifoth_val for PIO mode. 111452426899SSeungwon Jeon * If next issued data may be transfered by DMA mode, 111552426899SSeungwon Jeon * prev_blksz should be invalidated. 111652426899SSeungwon Jeon */ 111752426899SSeungwon Jeon mci_writel(host, FIFOTH, host->fifoth_val); 111852426899SSeungwon Jeon host->prev_blksz = 0; 111952426899SSeungwon Jeon } else { 112052426899SSeungwon Jeon /* 112152426899SSeungwon Jeon * Keep the current block size. 112252426899SSeungwon Jeon * It will be used to decide whether to update 112352426899SSeungwon Jeon * fifoth register next time. 112452426899SSeungwon Jeon */ 112552426899SSeungwon Jeon host->prev_blksz = data->blksz; 1126f95f3850SWill Newton } 1127f95f3850SWill Newton } 1128f95f3850SWill Newton 1129f95f3850SWill Newton static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) 1130f95f3850SWill Newton { 1131f95f3850SWill Newton struct dw_mci *host = slot->host; 1132f95f3850SWill Newton unsigned long timeout = jiffies + msecs_to_jiffies(500); 1133f95f3850SWill Newton unsigned int cmd_status = 0; 1134f95f3850SWill Newton 1135f95f3850SWill Newton mci_writel(host, CMDARG, arg); 11360e3a22c0SShawn Lin wmb(); /* drain writebuffer */ 11370bdbd0e8SDoug Anderson dw_mci_wait_while_busy(host, cmd); 1138f95f3850SWill Newton mci_writel(host, CMD, SDMMC_CMD_START | cmd); 1139f95f3850SWill Newton 1140f95f3850SWill Newton while (time_before(jiffies, timeout)) { 1141f95f3850SWill Newton cmd_status = mci_readl(host, CMD); 1142f95f3850SWill Newton if (!(cmd_status & SDMMC_CMD_START)) 1143f95f3850SWill Newton return; 1144f95f3850SWill Newton } 1145f95f3850SWill Newton dev_err(&slot->mmc->class_dev, 1146f95f3850SWill Newton "Timeout sending command (cmd %#x arg %#x status %#x)\n", 1147f95f3850SWill Newton cmd, arg, cmd_status); 1148f95f3850SWill Newton } 1149f95f3850SWill Newton 1150ab269128SAbhilash Kesavan static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) 1151f95f3850SWill Newton { 1152f95f3850SWill Newton struct dw_mci *host = slot->host; 1153fdf492a1SDoug Anderson unsigned int clock = slot->clock; 1154f95f3850SWill Newton u32 div; 11559623b5b9SDoug Anderson u32 clk_en_a; 115601730558SDoug Anderson u32 sdmmc_cmd_bits = SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT; 115701730558SDoug Anderson 115801730558SDoug Anderson /* We must continue to set bit 28 in CMD until the change is complete */ 115901730558SDoug Anderson if (host->state == STATE_WAITING_CMD11_DONE) 116001730558SDoug Anderson sdmmc_cmd_bits |= SDMMC_CMD_VOLT_SWITCH; 1161f95f3850SWill Newton 1162fdf492a1SDoug Anderson if (!clock) { 1163fdf492a1SDoug Anderson mci_writel(host, CLKENA, 0); 116401730558SDoug Anderson mci_send_cmd(slot, sdmmc_cmd_bits, 0); 1165fdf492a1SDoug Anderson } else if (clock != host->current_speed || force_clkinit) { 1166fdf492a1SDoug Anderson div = host->bus_hz / clock; 1167fdf492a1SDoug Anderson if (host->bus_hz % clock && host->bus_hz > clock) 1168f95f3850SWill Newton /* 1169f95f3850SWill Newton * move the + 1 after the divide to prevent 1170f95f3850SWill Newton * over-clocking the card. 1171f95f3850SWill Newton */ 1172e419990bSSeungwon Jeon div += 1; 1173e419990bSSeungwon Jeon 1174fdf492a1SDoug Anderson div = (host->bus_hz != clock) ? DIV_ROUND_UP(div, 2) : 0; 1175f95f3850SWill Newton 1176005d675aSJaehoon Chung if (clock != slot->__clk_old || force_clkinit) 1177f95f3850SWill Newton dev_info(&slot->mmc->class_dev, 1178fdf492a1SDoug Anderson "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ div = %d)\n", 1179fdf492a1SDoug Anderson slot->id, host->bus_hz, clock, 1180fdf492a1SDoug Anderson div ? ((host->bus_hz / div) >> 1) : 1181fdf492a1SDoug Anderson host->bus_hz, div); 1182f95f3850SWill Newton 1183f95f3850SWill Newton /* disable clock */ 1184f95f3850SWill Newton mci_writel(host, CLKENA, 0); 1185f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 1186f95f3850SWill Newton 1187f95f3850SWill Newton /* inform CIU */ 118801730558SDoug Anderson mci_send_cmd(slot, sdmmc_cmd_bits, 0); 1189f95f3850SWill Newton 1190f95f3850SWill Newton /* set clock to desired speed */ 1191f95f3850SWill Newton mci_writel(host, CLKDIV, div); 1192f95f3850SWill Newton 1193f95f3850SWill Newton /* inform CIU */ 119401730558SDoug Anderson mci_send_cmd(slot, sdmmc_cmd_bits, 0); 1195f95f3850SWill Newton 11969623b5b9SDoug Anderson /* enable clock; only low power if no SDIO */ 11979623b5b9SDoug Anderson clk_en_a = SDMMC_CLKEN_ENABLE << slot->id; 1198b24c8b26SDoug Anderson if (!test_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags)) 11999623b5b9SDoug Anderson clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id; 12009623b5b9SDoug Anderson mci_writel(host, CLKENA, clk_en_a); 1201f95f3850SWill Newton 1202f95f3850SWill Newton /* inform CIU */ 120301730558SDoug Anderson mci_send_cmd(slot, sdmmc_cmd_bits, 0); 1204005d675aSJaehoon Chung 1205005d675aSJaehoon Chung /* keep the last clock value that was requested from core */ 1206005d675aSJaehoon Chung slot->__clk_old = clock; 1207f95f3850SWill Newton } 1208f95f3850SWill Newton 1209fdf492a1SDoug Anderson host->current_speed = clock; 1210fdf492a1SDoug Anderson 1211f95f3850SWill Newton /* Set the current slot bus width */ 12121d56c453SSeungwon Jeon mci_writel(host, CTYPE, (slot->ctype << slot->id)); 1213f95f3850SWill Newton } 1214f95f3850SWill Newton 1215053b3ce6SSeungwon Jeon static void __dw_mci_start_request(struct dw_mci *host, 1216053b3ce6SSeungwon Jeon struct dw_mci_slot *slot, 1217053b3ce6SSeungwon Jeon struct mmc_command *cmd) 1218f95f3850SWill Newton { 1219f95f3850SWill Newton struct mmc_request *mrq; 1220f95f3850SWill Newton struct mmc_data *data; 1221f95f3850SWill Newton u32 cmdflags; 1222f95f3850SWill Newton 1223f95f3850SWill Newton mrq = slot->mrq; 1224f95f3850SWill Newton 1225f95f3850SWill Newton host->cur_slot = slot; 1226f95f3850SWill Newton host->mrq = mrq; 1227f95f3850SWill Newton 1228f95f3850SWill Newton host->pending_events = 0; 1229f95f3850SWill Newton host->completed_events = 0; 1230e352c813SSeungwon Jeon host->cmd_status = 0; 1231f95f3850SWill Newton host->data_status = 0; 1232e352c813SSeungwon Jeon host->dir_status = 0; 1233f95f3850SWill Newton 1234053b3ce6SSeungwon Jeon data = cmd->data; 1235f95f3850SWill Newton if (data) { 1236f16afa88SJaehoon Chung mci_writel(host, TMOUT, 0xFFFFFFFF); 1237f95f3850SWill Newton mci_writel(host, BYTCNT, data->blksz*data->blocks); 1238f95f3850SWill Newton mci_writel(host, BLKSIZ, data->blksz); 1239f95f3850SWill Newton } 1240f95f3850SWill Newton 1241f95f3850SWill Newton cmdflags = dw_mci_prepare_command(slot->mmc, cmd); 1242f95f3850SWill Newton 1243f95f3850SWill Newton /* this is the first command, send the initialization clock */ 1244f95f3850SWill Newton if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) 1245f95f3850SWill Newton cmdflags |= SDMMC_CMD_INIT; 1246f95f3850SWill Newton 1247f95f3850SWill Newton if (data) { 1248f95f3850SWill Newton dw_mci_submit_data(host, data); 12490e3a22c0SShawn Lin wmb(); /* drain writebuffer */ 1250f95f3850SWill Newton } 1251f95f3850SWill Newton 1252f95f3850SWill Newton dw_mci_start_command(host, cmd, cmdflags); 1253f95f3850SWill Newton 12545c935165SDoug Anderson if (cmd->opcode == SD_SWITCH_VOLTAGE) { 125549ba0302SDoug Anderson unsigned long irqflags; 125649ba0302SDoug Anderson 12575c935165SDoug Anderson /* 12588886a6fdSDoug Anderson * Databook says to fail after 2ms w/ no response, but evidence 12598886a6fdSDoug Anderson * shows that sometimes the cmd11 interrupt takes over 130ms. 12608886a6fdSDoug Anderson * We'll set to 500ms, plus an extra jiffy just in case jiffies 12618886a6fdSDoug Anderson * is just about to roll over. 126249ba0302SDoug Anderson * 126349ba0302SDoug Anderson * We do this whole thing under spinlock and only if the 126449ba0302SDoug Anderson * command hasn't already completed (indicating the the irq 126549ba0302SDoug Anderson * already ran so we don't want the timeout). 12665c935165SDoug Anderson */ 126749ba0302SDoug Anderson spin_lock_irqsave(&host->irq_lock, irqflags); 126849ba0302SDoug Anderson if (!test_bit(EVENT_CMD_COMPLETE, &host->pending_events)) 12695c935165SDoug Anderson mod_timer(&host->cmd11_timer, 12708886a6fdSDoug Anderson jiffies + msecs_to_jiffies(500) + 1); 127149ba0302SDoug Anderson spin_unlock_irqrestore(&host->irq_lock, irqflags); 12725c935165SDoug Anderson } 12735c935165SDoug Anderson 1274f95f3850SWill Newton if (mrq->stop) 1275f95f3850SWill Newton host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); 127690c2143aSSeungwon Jeon else 127790c2143aSSeungwon Jeon host->stop_cmdr = dw_mci_prep_stop_abort(host, cmd); 1278f95f3850SWill Newton } 1279f95f3850SWill Newton 1280053b3ce6SSeungwon Jeon static void dw_mci_start_request(struct dw_mci *host, 1281053b3ce6SSeungwon Jeon struct dw_mci_slot *slot) 1282053b3ce6SSeungwon Jeon { 1283053b3ce6SSeungwon Jeon struct mmc_request *mrq = slot->mrq; 1284053b3ce6SSeungwon Jeon struct mmc_command *cmd; 1285053b3ce6SSeungwon Jeon 1286053b3ce6SSeungwon Jeon cmd = mrq->sbc ? mrq->sbc : mrq->cmd; 1287053b3ce6SSeungwon Jeon __dw_mci_start_request(host, slot, cmd); 1288053b3ce6SSeungwon Jeon } 1289053b3ce6SSeungwon Jeon 12907456caaeSJames Hogan /* must be called with host->lock held */ 1291f95f3850SWill Newton static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, 1292f95f3850SWill Newton struct mmc_request *mrq) 1293f95f3850SWill Newton { 1294f95f3850SWill Newton dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", 1295f95f3850SWill Newton host->state); 1296f95f3850SWill Newton 1297f95f3850SWill Newton slot->mrq = mrq; 1298f95f3850SWill Newton 129901730558SDoug Anderson if (host->state == STATE_WAITING_CMD11_DONE) { 130001730558SDoug Anderson dev_warn(&slot->mmc->class_dev, 130101730558SDoug Anderson "Voltage change didn't complete\n"); 130201730558SDoug Anderson /* 130301730558SDoug Anderson * this case isn't expected to happen, so we can 130401730558SDoug Anderson * either crash here or just try to continue on 130501730558SDoug Anderson * in the closest possible state 130601730558SDoug Anderson */ 130701730558SDoug Anderson host->state = STATE_IDLE; 130801730558SDoug Anderson } 130901730558SDoug Anderson 1310f95f3850SWill Newton if (host->state == STATE_IDLE) { 1311f95f3850SWill Newton host->state = STATE_SENDING_CMD; 1312f95f3850SWill Newton dw_mci_start_request(host, slot); 1313f95f3850SWill Newton } else { 1314f95f3850SWill Newton list_add_tail(&slot->queue_node, &host->queue); 1315f95f3850SWill Newton } 1316f95f3850SWill Newton } 1317f95f3850SWill Newton 1318f95f3850SWill Newton static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) 1319f95f3850SWill Newton { 1320f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 1321f95f3850SWill Newton struct dw_mci *host = slot->host; 1322f95f3850SWill Newton 1323f95f3850SWill Newton WARN_ON(slot->mrq); 1324f95f3850SWill Newton 13257456caaeSJames Hogan /* 13267456caaeSJames Hogan * The check for card presence and queueing of the request must be 13277456caaeSJames Hogan * atomic, otherwise the card could be removed in between and the 13287456caaeSJames Hogan * request wouldn't fail until another card was inserted. 13297456caaeSJames Hogan */ 13307456caaeSJames Hogan 133156f6911cSShawn Lin if (!dw_mci_get_cd(mmc)) { 1332f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 1333f95f3850SWill Newton mmc_request_done(mmc, mrq); 1334f95f3850SWill Newton return; 1335f95f3850SWill Newton } 1336f95f3850SWill Newton 133756f6911cSShawn Lin spin_lock_bh(&host->lock); 133856f6911cSShawn Lin 1339f95f3850SWill Newton dw_mci_queue_request(host, slot, mrq); 13407456caaeSJames Hogan 13417456caaeSJames Hogan spin_unlock_bh(&host->lock); 1342f95f3850SWill Newton } 1343f95f3850SWill Newton 1344f95f3850SWill Newton static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 1345f95f3850SWill Newton { 1346f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 1347e95baf13SArnd Bergmann const struct dw_mci_drv_data *drv_data = slot->host->drv_data; 134841babf75SJaehoon Chung u32 regs; 134951da2240SYuvaraj CD int ret; 1350f95f3850SWill Newton 1351f95f3850SWill Newton switch (ios->bus_width) { 1352f95f3850SWill Newton case MMC_BUS_WIDTH_4: 1353f95f3850SWill Newton slot->ctype = SDMMC_CTYPE_4BIT; 1354f95f3850SWill Newton break; 1355c9b2a06fSJaehoon Chung case MMC_BUS_WIDTH_8: 1356c9b2a06fSJaehoon Chung slot->ctype = SDMMC_CTYPE_8BIT; 1357c9b2a06fSJaehoon Chung break; 1358b2f7cb45SJaehoon Chung default: 1359b2f7cb45SJaehoon Chung /* set default 1 bit mode */ 1360b2f7cb45SJaehoon Chung slot->ctype = SDMMC_CTYPE_1BIT; 1361f95f3850SWill Newton } 1362f95f3850SWill Newton 136341babf75SJaehoon Chung regs = mci_readl(slot->host, UHS_REG); 13643f514291SSeungwon Jeon 13653f514291SSeungwon Jeon /* DDR mode set */ 136680113132SSeungwon Jeon if (ios->timing == MMC_TIMING_MMC_DDR52 || 13677cc8d580SJaehoon Chung ios->timing == MMC_TIMING_UHS_DDR50 || 136880113132SSeungwon Jeon ios->timing == MMC_TIMING_MMC_HS400) 1369c69042a5SHyeonsu Kim regs |= ((0x1 << slot->id) << 16); 13703f514291SSeungwon Jeon else 1371c69042a5SHyeonsu Kim regs &= ~((0x1 << slot->id) << 16); 13723f514291SSeungwon Jeon 137341babf75SJaehoon Chung mci_writel(slot->host, UHS_REG, regs); 1374f1d2736cSSeungwon Jeon slot->host->timing = ios->timing; 137541babf75SJaehoon Chung 1376f95f3850SWill Newton /* 1377f95f3850SWill Newton * Use mirror of ios->clock to prevent race with mmc 1378f95f3850SWill Newton * core ios update when finding the minimum. 1379f95f3850SWill Newton */ 1380f95f3850SWill Newton slot->clock = ios->clock; 1381f95f3850SWill Newton 1382cb27a843SJames Hogan if (drv_data && drv_data->set_ios) 1383cb27a843SJames Hogan drv_data->set_ios(slot->host, ios); 1384800d78bfSThomas Abraham 1385f95f3850SWill Newton switch (ios->power_mode) { 1386f95f3850SWill Newton case MMC_POWER_UP: 138751da2240SYuvaraj CD if (!IS_ERR(mmc->supply.vmmc)) { 138851da2240SYuvaraj CD ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 138951da2240SYuvaraj CD ios->vdd); 139051da2240SYuvaraj CD if (ret) { 139151da2240SYuvaraj CD dev_err(slot->host->dev, 139251da2240SYuvaraj CD "failed to enable vmmc regulator\n"); 139351da2240SYuvaraj CD /*return, if failed turn on vmmc*/ 139451da2240SYuvaraj CD return; 139551da2240SYuvaraj CD } 139651da2240SYuvaraj CD } 139729d0d161SDoug Anderson set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); 139829d0d161SDoug Anderson regs = mci_readl(slot->host, PWREN); 139929d0d161SDoug Anderson regs |= (1 << slot->id); 140029d0d161SDoug Anderson mci_writel(slot->host, PWREN, regs); 140129d0d161SDoug Anderson break; 140229d0d161SDoug Anderson case MMC_POWER_ON: 1403d1f1dd86SDoug Anderson if (!slot->host->vqmmc_enabled) { 1404d1f1dd86SDoug Anderson if (!IS_ERR(mmc->supply.vqmmc)) { 140551da2240SYuvaraj CD ret = regulator_enable(mmc->supply.vqmmc); 140651da2240SYuvaraj CD if (ret < 0) 140751da2240SYuvaraj CD dev_err(slot->host->dev, 1408d1f1dd86SDoug Anderson "failed to enable vqmmc\n"); 140951da2240SYuvaraj CD else 141051da2240SYuvaraj CD slot->host->vqmmc_enabled = true; 1411d1f1dd86SDoug Anderson 1412d1f1dd86SDoug Anderson } else { 1413d1f1dd86SDoug Anderson /* Keep track so we don't reset again */ 1414d1f1dd86SDoug Anderson slot->host->vqmmc_enabled = true; 1415d1f1dd86SDoug Anderson } 1416d1f1dd86SDoug Anderson 1417d1f1dd86SDoug Anderson /* Reset our state machine after powering on */ 1418d1f1dd86SDoug Anderson dw_mci_ctrl_reset(slot->host, 1419d1f1dd86SDoug Anderson SDMMC_CTRL_ALL_RESET_FLAGS); 142051da2240SYuvaraj CD } 1421655babbdSDoug Anderson 1422655babbdSDoug Anderson /* Adjust clock / bus width after power is up */ 1423655babbdSDoug Anderson dw_mci_setup_bus(slot, false); 1424655babbdSDoug Anderson 1425e6f34e2fSJames Hogan break; 1426e6f34e2fSJames Hogan case MMC_POWER_OFF: 1427655babbdSDoug Anderson /* Turn clock off before power goes down */ 1428655babbdSDoug Anderson dw_mci_setup_bus(slot, false); 1429655babbdSDoug Anderson 143051da2240SYuvaraj CD if (!IS_ERR(mmc->supply.vmmc)) 143151da2240SYuvaraj CD mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); 143251da2240SYuvaraj CD 1433d1f1dd86SDoug Anderson if (!IS_ERR(mmc->supply.vqmmc) && slot->host->vqmmc_enabled) 143451da2240SYuvaraj CD regulator_disable(mmc->supply.vqmmc); 143551da2240SYuvaraj CD slot->host->vqmmc_enabled = false; 143651da2240SYuvaraj CD 14374366dcc5SJaehoon Chung regs = mci_readl(slot->host, PWREN); 14384366dcc5SJaehoon Chung regs &= ~(1 << slot->id); 14394366dcc5SJaehoon Chung mci_writel(slot->host, PWREN, regs); 1440f95f3850SWill Newton break; 1441f95f3850SWill Newton default: 1442f95f3850SWill Newton break; 1443f95f3850SWill Newton } 1444655babbdSDoug Anderson 1445655babbdSDoug Anderson if (slot->host->state == STATE_WAITING_CMD11_DONE && ios->clock != 0) 1446655babbdSDoug Anderson slot->host->state = STATE_IDLE; 1447f95f3850SWill Newton } 1448f95f3850SWill Newton 144901730558SDoug Anderson static int dw_mci_card_busy(struct mmc_host *mmc) 145001730558SDoug Anderson { 145101730558SDoug Anderson struct dw_mci_slot *slot = mmc_priv(mmc); 145201730558SDoug Anderson u32 status; 145301730558SDoug Anderson 145401730558SDoug Anderson /* 145501730558SDoug Anderson * Check the busy bit which is low when DAT[3:0] 145601730558SDoug Anderson * (the data lines) are 0000 145701730558SDoug Anderson */ 145801730558SDoug Anderson status = mci_readl(slot->host, STATUS); 145901730558SDoug Anderson 146001730558SDoug Anderson return !!(status & SDMMC_STATUS_BUSY); 146101730558SDoug Anderson } 146201730558SDoug Anderson 146301730558SDoug Anderson static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) 146401730558SDoug Anderson { 146501730558SDoug Anderson struct dw_mci_slot *slot = mmc_priv(mmc); 146601730558SDoug Anderson struct dw_mci *host = slot->host; 14678f7849c4SZhangfei Gao const struct dw_mci_drv_data *drv_data = host->drv_data; 146801730558SDoug Anderson u32 uhs; 146901730558SDoug Anderson u32 v18 = SDMMC_UHS_18V << slot->id; 147001730558SDoug Anderson int ret; 147101730558SDoug Anderson 14728f7849c4SZhangfei Gao if (drv_data && drv_data->switch_voltage) 14738f7849c4SZhangfei Gao return drv_data->switch_voltage(mmc, ios); 14748f7849c4SZhangfei Gao 147501730558SDoug Anderson /* 147601730558SDoug Anderson * Program the voltage. Note that some instances of dw_mmc may use 147701730558SDoug Anderson * the UHS_REG for this. For other instances (like exynos) the UHS_REG 147801730558SDoug Anderson * does no harm but you need to set the regulator directly. Try both. 147901730558SDoug Anderson */ 148001730558SDoug Anderson uhs = mci_readl(host, UHS_REG); 1481e0848f5dSDouglas Anderson if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) 148201730558SDoug Anderson uhs &= ~v18; 1483e0848f5dSDouglas Anderson else 148401730558SDoug Anderson uhs |= v18; 1485e0848f5dSDouglas Anderson 148601730558SDoug Anderson if (!IS_ERR(mmc->supply.vqmmc)) { 1487e0848f5dSDouglas Anderson ret = mmc_regulator_set_vqmmc(mmc, ios); 148801730558SDoug Anderson 148901730558SDoug Anderson if (ret) { 1490b19caf37SDoug Anderson dev_dbg(&mmc->class_dev, 1491e0848f5dSDouglas Anderson "Regulator set error %d - %s V\n", 1492e0848f5dSDouglas Anderson ret, uhs & v18 ? "1.8" : "3.3"); 149301730558SDoug Anderson return ret; 149401730558SDoug Anderson } 149501730558SDoug Anderson } 149601730558SDoug Anderson mci_writel(host, UHS_REG, uhs); 149701730558SDoug Anderson 149801730558SDoug Anderson return 0; 149901730558SDoug Anderson } 150001730558SDoug Anderson 1501f95f3850SWill Newton static int dw_mci_get_ro(struct mmc_host *mmc) 1502f95f3850SWill Newton { 1503f95f3850SWill Newton int read_only; 1504f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 15059795a846SJaehoon Chung int gpio_ro = mmc_gpio_get_ro(mmc); 1506f95f3850SWill Newton 1507f95f3850SWill Newton /* Use platform get_ro function, else try on board write protect */ 1508287980e4SArnd Bergmann if (gpio_ro >= 0) 15099795a846SJaehoon Chung read_only = gpio_ro; 1510f95f3850SWill Newton else 1511f95f3850SWill Newton read_only = 1512f95f3850SWill Newton mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; 1513f95f3850SWill Newton 1514f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is %s\n", 1515f95f3850SWill Newton read_only ? "read-only" : "read-write"); 1516f95f3850SWill Newton 1517f95f3850SWill Newton return read_only; 1518f95f3850SWill Newton } 1519f95f3850SWill Newton 1520f95f3850SWill Newton static int dw_mci_get_cd(struct mmc_host *mmc) 1521f95f3850SWill Newton { 1522f95f3850SWill Newton int present; 1523f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 15247cf347bdSZhangfei Gao struct dw_mci *host = slot->host; 15257cf347bdSZhangfei Gao int gpio_cd = mmc_gpio_get_cd(mmc); 1526f95f3850SWill Newton 1527f95f3850SWill Newton /* Use platform get_cd function, else try onboard card detect */ 1528860951c5SJaehoon Chung if ((mmc->caps & MMC_CAP_NEEDS_POLL) || !mmc_card_is_removable(mmc)) 1529fc3d7720SJaehoon Chung present = 1; 1530287980e4SArnd Bergmann else if (gpio_cd >= 0) 15317cf347bdSZhangfei Gao present = gpio_cd; 1532f95f3850SWill Newton else 1533f95f3850SWill Newton present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) 1534f95f3850SWill Newton == 0 ? 1 : 0; 1535f95f3850SWill Newton 15367cf347bdSZhangfei Gao spin_lock_bh(&host->lock); 1537bf626e55SZhangfei Gao if (present) { 1538bf626e55SZhangfei Gao set_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1539f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is present\n"); 1540bf626e55SZhangfei Gao } else { 1541bf626e55SZhangfei Gao clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1542f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is not present\n"); 1543bf626e55SZhangfei Gao } 15447cf347bdSZhangfei Gao spin_unlock_bh(&host->lock); 1545f95f3850SWill Newton 1546f95f3850SWill Newton return present; 1547f95f3850SWill Newton } 1548f95f3850SWill Newton 1549935a665eSShawn Lin static void dw_mci_hw_reset(struct mmc_host *mmc) 1550935a665eSShawn Lin { 1551935a665eSShawn Lin struct dw_mci_slot *slot = mmc_priv(mmc); 1552935a665eSShawn Lin struct dw_mci *host = slot->host; 1553935a665eSShawn Lin int reset; 1554935a665eSShawn Lin 1555935a665eSShawn Lin if (host->use_dma == TRANS_MODE_IDMAC) 1556935a665eSShawn Lin dw_mci_idmac_reset(host); 1557935a665eSShawn Lin 1558935a665eSShawn Lin if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET | 1559935a665eSShawn Lin SDMMC_CTRL_FIFO_RESET)) 1560935a665eSShawn Lin return; 1561935a665eSShawn Lin 1562935a665eSShawn Lin /* 1563935a665eSShawn Lin * According to eMMC spec, card reset procedure: 1564935a665eSShawn Lin * tRstW >= 1us: RST_n pulse width 1565935a665eSShawn Lin * tRSCA >= 200us: RST_n to Command time 1566935a665eSShawn Lin * tRSTH >= 1us: RST_n high period 1567935a665eSShawn Lin */ 1568935a665eSShawn Lin reset = mci_readl(host, RST_N); 1569935a665eSShawn Lin reset &= ~(SDMMC_RST_HWACTIVE << slot->id); 1570935a665eSShawn Lin mci_writel(host, RST_N, reset); 1571935a665eSShawn Lin usleep_range(1, 2); 1572935a665eSShawn Lin reset |= SDMMC_RST_HWACTIVE << slot->id; 1573935a665eSShawn Lin mci_writel(host, RST_N, reset); 1574935a665eSShawn Lin usleep_range(200, 300); 1575935a665eSShawn Lin } 1576935a665eSShawn Lin 1577b24c8b26SDoug Anderson static void dw_mci_init_card(struct mmc_host *mmc, struct mmc_card *card) 1578b24c8b26SDoug Anderson { 1579b24c8b26SDoug Anderson struct dw_mci_slot *slot = mmc_priv(mmc); 1580b24c8b26SDoug Anderson struct dw_mci *host = slot->host; 1581b24c8b26SDoug Anderson 15829623b5b9SDoug Anderson /* 15839623b5b9SDoug Anderson * Low power mode will stop the card clock when idle. According to the 15849623b5b9SDoug Anderson * description of the CLKENA register we should disable low power mode 15859623b5b9SDoug Anderson * for SDIO cards if we need SDIO interrupts to work. 15869623b5b9SDoug Anderson */ 1587b24c8b26SDoug Anderson if (mmc->caps & MMC_CAP_SDIO_IRQ) { 15889623b5b9SDoug Anderson const u32 clken_low_pwr = SDMMC_CLKEN_LOW_PWR << slot->id; 1589b24c8b26SDoug Anderson u32 clk_en_a_old; 1590b24c8b26SDoug Anderson u32 clk_en_a; 15919623b5b9SDoug Anderson 1592b24c8b26SDoug Anderson clk_en_a_old = mci_readl(host, CLKENA); 15939623b5b9SDoug Anderson 1594b24c8b26SDoug Anderson if (card->type == MMC_TYPE_SDIO || 1595b24c8b26SDoug Anderson card->type == MMC_TYPE_SD_COMBO) { 1596b24c8b26SDoug Anderson set_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags); 1597b24c8b26SDoug Anderson clk_en_a = clk_en_a_old & ~clken_low_pwr; 1598b24c8b26SDoug Anderson } else { 1599b24c8b26SDoug Anderson clear_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags); 1600b24c8b26SDoug Anderson clk_en_a = clk_en_a_old | clken_low_pwr; 1601b24c8b26SDoug Anderson } 1602b24c8b26SDoug Anderson 1603b24c8b26SDoug Anderson if (clk_en_a != clk_en_a_old) { 1604b24c8b26SDoug Anderson mci_writel(host, CLKENA, clk_en_a); 16059623b5b9SDoug Anderson mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | 16069623b5b9SDoug Anderson SDMMC_CMD_PRV_DAT_WAIT, 0); 16079623b5b9SDoug Anderson } 16089623b5b9SDoug Anderson } 1609b24c8b26SDoug Anderson } 16109623b5b9SDoug Anderson 16111a5c8e1fSShashidhar Hiremath static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) 16121a5c8e1fSShashidhar Hiremath { 16131a5c8e1fSShashidhar Hiremath struct dw_mci_slot *slot = mmc_priv(mmc); 16141a5c8e1fSShashidhar Hiremath struct dw_mci *host = slot->host; 1615f8c58c11SDoug Anderson unsigned long irqflags; 16161a5c8e1fSShashidhar Hiremath u32 int_mask; 16171a5c8e1fSShashidhar Hiremath 1618f8c58c11SDoug Anderson spin_lock_irqsave(&host->irq_lock, irqflags); 1619f8c58c11SDoug Anderson 16201a5c8e1fSShashidhar Hiremath /* Enable/disable Slot Specific SDIO interrupt */ 16211a5c8e1fSShashidhar Hiremath int_mask = mci_readl(host, INTMASK); 1622b24c8b26SDoug Anderson if (enb) 1623b24c8b26SDoug Anderson int_mask |= SDMMC_INT_SDIO(slot->sdio_id); 1624b24c8b26SDoug Anderson else 1625b24c8b26SDoug Anderson int_mask &= ~SDMMC_INT_SDIO(slot->sdio_id); 1626b24c8b26SDoug Anderson mci_writel(host, INTMASK, int_mask); 1627f8c58c11SDoug Anderson 1628f8c58c11SDoug Anderson spin_unlock_irqrestore(&host->irq_lock, irqflags); 16291a5c8e1fSShashidhar Hiremath } 16301a5c8e1fSShashidhar Hiremath 16310976f16dSSeungwon Jeon static int dw_mci_execute_tuning(struct mmc_host *mmc, u32 opcode) 16320976f16dSSeungwon Jeon { 16330976f16dSSeungwon Jeon struct dw_mci_slot *slot = mmc_priv(mmc); 16340976f16dSSeungwon Jeon struct dw_mci *host = slot->host; 16350976f16dSSeungwon Jeon const struct dw_mci_drv_data *drv_data = host->drv_data; 16360e3a22c0SShawn Lin int err = -EINVAL; 16370976f16dSSeungwon Jeon 16380976f16dSSeungwon Jeon if (drv_data && drv_data->execute_tuning) 16399979dbe5SChaotian Jing err = drv_data->execute_tuning(slot, opcode); 16400976f16dSSeungwon Jeon return err; 16410976f16dSSeungwon Jeon } 16420976f16dSSeungwon Jeon 16430e3a22c0SShawn Lin static int dw_mci_prepare_hs400_tuning(struct mmc_host *mmc, 16440e3a22c0SShawn Lin struct mmc_ios *ios) 164580113132SSeungwon Jeon { 164680113132SSeungwon Jeon struct dw_mci_slot *slot = mmc_priv(mmc); 164780113132SSeungwon Jeon struct dw_mci *host = slot->host; 164880113132SSeungwon Jeon const struct dw_mci_drv_data *drv_data = host->drv_data; 164980113132SSeungwon Jeon 165080113132SSeungwon Jeon if (drv_data && drv_data->prepare_hs400_tuning) 165180113132SSeungwon Jeon return drv_data->prepare_hs400_tuning(host, ios); 165280113132SSeungwon Jeon 165380113132SSeungwon Jeon return 0; 165480113132SSeungwon Jeon } 165580113132SSeungwon Jeon 1656f95f3850SWill Newton static const struct mmc_host_ops dw_mci_ops = { 1657f95f3850SWill Newton .request = dw_mci_request, 16589aa51408SSeungwon Jeon .pre_req = dw_mci_pre_req, 16599aa51408SSeungwon Jeon .post_req = dw_mci_post_req, 1660f95f3850SWill Newton .set_ios = dw_mci_set_ios, 1661f95f3850SWill Newton .get_ro = dw_mci_get_ro, 1662f95f3850SWill Newton .get_cd = dw_mci_get_cd, 1663935a665eSShawn Lin .hw_reset = dw_mci_hw_reset, 16641a5c8e1fSShashidhar Hiremath .enable_sdio_irq = dw_mci_enable_sdio_irq, 16650976f16dSSeungwon Jeon .execute_tuning = dw_mci_execute_tuning, 166601730558SDoug Anderson .card_busy = dw_mci_card_busy, 166701730558SDoug Anderson .start_signal_voltage_switch = dw_mci_switch_voltage, 1668b24c8b26SDoug Anderson .init_card = dw_mci_init_card, 166980113132SSeungwon Jeon .prepare_hs400_tuning = dw_mci_prepare_hs400_tuning, 1670f95f3850SWill Newton }; 1671f95f3850SWill Newton 1672f95f3850SWill Newton static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) 1673f95f3850SWill Newton __releases(&host->lock) 1674f95f3850SWill Newton __acquires(&host->lock) 1675f95f3850SWill Newton { 1676f95f3850SWill Newton struct dw_mci_slot *slot; 1677f95f3850SWill Newton struct mmc_host *prev_mmc = host->cur_slot->mmc; 1678f95f3850SWill Newton 1679f95f3850SWill Newton WARN_ON(host->cmd || host->data); 1680f95f3850SWill Newton 1681f95f3850SWill Newton host->cur_slot->mrq = NULL; 1682f95f3850SWill Newton host->mrq = NULL; 1683f95f3850SWill Newton if (!list_empty(&host->queue)) { 1684f95f3850SWill Newton slot = list_entry(host->queue.next, 1685f95f3850SWill Newton struct dw_mci_slot, queue_node); 1686f95f3850SWill Newton list_del(&slot->queue_node); 16874a90920cSThomas Abraham dev_vdbg(host->dev, "list not empty: %s is next\n", 1688f95f3850SWill Newton mmc_hostname(slot->mmc)); 1689f95f3850SWill Newton host->state = STATE_SENDING_CMD; 1690f95f3850SWill Newton dw_mci_start_request(host, slot); 1691f95f3850SWill Newton } else { 16924a90920cSThomas Abraham dev_vdbg(host->dev, "list empty\n"); 169301730558SDoug Anderson 169401730558SDoug Anderson if (host->state == STATE_SENDING_CMD11) 169501730558SDoug Anderson host->state = STATE_WAITING_CMD11_DONE; 169601730558SDoug Anderson else 1697f95f3850SWill Newton host->state = STATE_IDLE; 1698f95f3850SWill Newton } 1699f95f3850SWill Newton 1700f95f3850SWill Newton spin_unlock(&host->lock); 1701f95f3850SWill Newton mmc_request_done(prev_mmc, mrq); 1702f95f3850SWill Newton spin_lock(&host->lock); 1703f95f3850SWill Newton } 1704f95f3850SWill Newton 1705e352c813SSeungwon Jeon static int dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) 1706f95f3850SWill Newton { 1707f95f3850SWill Newton u32 status = host->cmd_status; 1708f95f3850SWill Newton 1709f95f3850SWill Newton host->cmd_status = 0; 1710f95f3850SWill Newton 1711f95f3850SWill Newton /* Read the response from the card (up to 16 bytes) */ 1712f95f3850SWill Newton if (cmd->flags & MMC_RSP_PRESENT) { 1713f95f3850SWill Newton if (cmd->flags & MMC_RSP_136) { 1714f95f3850SWill Newton cmd->resp[3] = mci_readl(host, RESP0); 1715f95f3850SWill Newton cmd->resp[2] = mci_readl(host, RESP1); 1716f95f3850SWill Newton cmd->resp[1] = mci_readl(host, RESP2); 1717f95f3850SWill Newton cmd->resp[0] = mci_readl(host, RESP3); 1718f95f3850SWill Newton } else { 1719f95f3850SWill Newton cmd->resp[0] = mci_readl(host, RESP0); 1720f95f3850SWill Newton cmd->resp[1] = 0; 1721f95f3850SWill Newton cmd->resp[2] = 0; 1722f95f3850SWill Newton cmd->resp[3] = 0; 1723f95f3850SWill Newton } 1724f95f3850SWill Newton } 1725f95f3850SWill Newton 1726f95f3850SWill Newton if (status & SDMMC_INT_RTO) 1727f95f3850SWill Newton cmd->error = -ETIMEDOUT; 1728f95f3850SWill Newton else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) 1729f95f3850SWill Newton cmd->error = -EILSEQ; 1730f95f3850SWill Newton else if (status & SDMMC_INT_RESP_ERR) 1731f95f3850SWill Newton cmd->error = -EIO; 1732f95f3850SWill Newton else 1733f95f3850SWill Newton cmd->error = 0; 1734f95f3850SWill Newton 1735e352c813SSeungwon Jeon return cmd->error; 1736e352c813SSeungwon Jeon } 1737e352c813SSeungwon Jeon 1738e352c813SSeungwon Jeon static int dw_mci_data_complete(struct dw_mci *host, struct mmc_data *data) 1739e352c813SSeungwon Jeon { 174031bff450SSeungwon Jeon u32 status = host->data_status; 1741e352c813SSeungwon Jeon 1742e352c813SSeungwon Jeon if (status & DW_MCI_DATA_ERROR_FLAGS) { 1743e352c813SSeungwon Jeon if (status & SDMMC_INT_DRTO) { 1744e352c813SSeungwon Jeon data->error = -ETIMEDOUT; 1745e352c813SSeungwon Jeon } else if (status & SDMMC_INT_DCRC) { 1746e352c813SSeungwon Jeon data->error = -EILSEQ; 1747e352c813SSeungwon Jeon } else if (status & SDMMC_INT_EBE) { 1748e352c813SSeungwon Jeon if (host->dir_status == 1749e352c813SSeungwon Jeon DW_MCI_SEND_STATUS) { 1750e352c813SSeungwon Jeon /* 1751e352c813SSeungwon Jeon * No data CRC status was returned. 1752e352c813SSeungwon Jeon * The number of bytes transferred 1753e352c813SSeungwon Jeon * will be exaggerated in PIO mode. 1754e352c813SSeungwon Jeon */ 1755e352c813SSeungwon Jeon data->bytes_xfered = 0; 1756e352c813SSeungwon Jeon data->error = -ETIMEDOUT; 1757e352c813SSeungwon Jeon } else if (host->dir_status == 1758e352c813SSeungwon Jeon DW_MCI_RECV_STATUS) { 1759e7a1dec1SShawn Lin data->error = -EILSEQ; 1760e352c813SSeungwon Jeon } 1761e352c813SSeungwon Jeon } else { 1762e352c813SSeungwon Jeon /* SDMMC_INT_SBE is included */ 1763e7a1dec1SShawn Lin data->error = -EILSEQ; 1764e352c813SSeungwon Jeon } 1765e352c813SSeungwon Jeon 1766e6cc0123SDoug Anderson dev_dbg(host->dev, "data error, status 0x%08x\n", status); 1767e352c813SSeungwon Jeon 1768e352c813SSeungwon Jeon /* 1769e352c813SSeungwon Jeon * After an error, there may be data lingering 177031bff450SSeungwon Jeon * in the FIFO 1771e352c813SSeungwon Jeon */ 17723a33a94cSSonny Rao dw_mci_reset(host); 1773e352c813SSeungwon Jeon } else { 1774e352c813SSeungwon Jeon data->bytes_xfered = data->blocks * data->blksz; 1775e352c813SSeungwon Jeon data->error = 0; 1776e352c813SSeungwon Jeon } 1777e352c813SSeungwon Jeon 1778e352c813SSeungwon Jeon return data->error; 1779f95f3850SWill Newton } 1780f95f3850SWill Newton 178157e10486SAddy Ke static void dw_mci_set_drto(struct dw_mci *host) 178257e10486SAddy Ke { 178357e10486SAddy Ke unsigned int drto_clks; 178457e10486SAddy Ke unsigned int drto_ms; 178557e10486SAddy Ke 178657e10486SAddy Ke drto_clks = mci_readl(host, TMOUT) >> 8; 178757e10486SAddy Ke drto_ms = DIV_ROUND_UP(drto_clks, host->bus_hz / 1000); 178857e10486SAddy Ke 178957e10486SAddy Ke /* add a bit spare time */ 179057e10486SAddy Ke drto_ms += 10; 179157e10486SAddy Ke 179257e10486SAddy Ke mod_timer(&host->dto_timer, jiffies + msecs_to_jiffies(drto_ms)); 179357e10486SAddy Ke } 179457e10486SAddy Ke 1795f95f3850SWill Newton static void dw_mci_tasklet_func(unsigned long priv) 1796f95f3850SWill Newton { 1797f95f3850SWill Newton struct dw_mci *host = (struct dw_mci *)priv; 1798f95f3850SWill Newton struct mmc_data *data; 1799f95f3850SWill Newton struct mmc_command *cmd; 1800e352c813SSeungwon Jeon struct mmc_request *mrq; 1801f95f3850SWill Newton enum dw_mci_state state; 1802f95f3850SWill Newton enum dw_mci_state prev_state; 1803e352c813SSeungwon Jeon unsigned int err; 1804f95f3850SWill Newton 1805f95f3850SWill Newton spin_lock(&host->lock); 1806f95f3850SWill Newton 1807f95f3850SWill Newton state = host->state; 1808f95f3850SWill Newton data = host->data; 1809e352c813SSeungwon Jeon mrq = host->mrq; 1810f95f3850SWill Newton 1811f95f3850SWill Newton do { 1812f95f3850SWill Newton prev_state = state; 1813f95f3850SWill Newton 1814f95f3850SWill Newton switch (state) { 1815f95f3850SWill Newton case STATE_IDLE: 181601730558SDoug Anderson case STATE_WAITING_CMD11_DONE: 1817f95f3850SWill Newton break; 1818f95f3850SWill Newton 181901730558SDoug Anderson case STATE_SENDING_CMD11: 1820f95f3850SWill Newton case STATE_SENDING_CMD: 1821f95f3850SWill Newton if (!test_and_clear_bit(EVENT_CMD_COMPLETE, 1822f95f3850SWill Newton &host->pending_events)) 1823f95f3850SWill Newton break; 1824f95f3850SWill Newton 1825f95f3850SWill Newton cmd = host->cmd; 1826f95f3850SWill Newton host->cmd = NULL; 1827f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->completed_events); 1828e352c813SSeungwon Jeon err = dw_mci_command_complete(host, cmd); 1829e352c813SSeungwon Jeon if (cmd == mrq->sbc && !err) { 1830053b3ce6SSeungwon Jeon prev_state = state = STATE_SENDING_CMD; 1831053b3ce6SSeungwon Jeon __dw_mci_start_request(host, host->cur_slot, 1832e352c813SSeungwon Jeon mrq->cmd); 1833053b3ce6SSeungwon Jeon goto unlock; 1834053b3ce6SSeungwon Jeon } 1835053b3ce6SSeungwon Jeon 1836e352c813SSeungwon Jeon if (cmd->data && err) { 183746d17952SDoug Anderson /* 183846d17952SDoug Anderson * During UHS tuning sequence, sending the stop 183946d17952SDoug Anderson * command after the response CRC error would 184046d17952SDoug Anderson * throw the system into a confused state 184146d17952SDoug Anderson * causing all future tuning phases to report 184246d17952SDoug Anderson * failure. 184346d17952SDoug Anderson * 184446d17952SDoug Anderson * In such case controller will move into a data 184546d17952SDoug Anderson * transfer state after a response error or 184646d17952SDoug Anderson * response CRC error. Let's let that finish 184746d17952SDoug Anderson * before trying to send a stop, so we'll go to 184846d17952SDoug Anderson * STATE_SENDING_DATA. 184946d17952SDoug Anderson * 185046d17952SDoug Anderson * Although letting the data transfer take place 185146d17952SDoug Anderson * will waste a bit of time (we already know 185246d17952SDoug Anderson * the command was bad), it can't cause any 185346d17952SDoug Anderson * errors since it's possible it would have 185446d17952SDoug Anderson * taken place anyway if this tasklet got 185546d17952SDoug Anderson * delayed. Allowing the transfer to take place 185646d17952SDoug Anderson * avoids races and keeps things simple. 185746d17952SDoug Anderson */ 185846d17952SDoug Anderson if ((err != -ETIMEDOUT) && 185946d17952SDoug Anderson (cmd->opcode == MMC_SEND_TUNING_BLOCK)) { 186046d17952SDoug Anderson state = STATE_SENDING_DATA; 186146d17952SDoug Anderson continue; 186246d17952SDoug Anderson } 186346d17952SDoug Anderson 186471abb133SSeungwon Jeon dw_mci_stop_dma(host); 186590c2143aSSeungwon Jeon send_stop_abort(host, data); 186671abb133SSeungwon Jeon state = STATE_SENDING_STOP; 186771abb133SSeungwon Jeon break; 186871abb133SSeungwon Jeon } 186971abb133SSeungwon Jeon 1870e352c813SSeungwon Jeon if (!cmd->data || err) { 1871e352c813SSeungwon Jeon dw_mci_request_end(host, mrq); 1872f95f3850SWill Newton goto unlock; 1873f95f3850SWill Newton } 1874f95f3850SWill Newton 1875f95f3850SWill Newton prev_state = state = STATE_SENDING_DATA; 1876f95f3850SWill Newton /* fall through */ 1877f95f3850SWill Newton 1878f95f3850SWill Newton case STATE_SENDING_DATA: 18792aa35465SDoug Anderson /* 18802aa35465SDoug Anderson * We could get a data error and never a transfer 18812aa35465SDoug Anderson * complete so we'd better check for it here. 18822aa35465SDoug Anderson * 18832aa35465SDoug Anderson * Note that we don't really care if we also got a 18842aa35465SDoug Anderson * transfer complete; stopping the DMA and sending an 18852aa35465SDoug Anderson * abort won't hurt. 18862aa35465SDoug Anderson */ 1887f95f3850SWill Newton if (test_and_clear_bit(EVENT_DATA_ERROR, 1888f95f3850SWill Newton &host->pending_events)) { 1889f95f3850SWill Newton dw_mci_stop_dma(host); 1890bdb9a90bSaddy ke if (data->stop || 1891bdb9a90bSaddy ke !(host->data_status & (SDMMC_INT_DRTO | 1892bdb9a90bSaddy ke SDMMC_INT_EBE))) 189390c2143aSSeungwon Jeon send_stop_abort(host, data); 1894f95f3850SWill Newton state = STATE_DATA_ERROR; 1895f95f3850SWill Newton break; 1896f95f3850SWill Newton } 1897f95f3850SWill Newton 1898f95f3850SWill Newton if (!test_and_clear_bit(EVENT_XFER_COMPLETE, 189957e10486SAddy Ke &host->pending_events)) { 190057e10486SAddy Ke /* 190157e10486SAddy Ke * If all data-related interrupts don't come 190257e10486SAddy Ke * within the given time in reading data state. 190357e10486SAddy Ke */ 190416a34574SJaehoon Chung if (host->dir_status == DW_MCI_RECV_STATUS) 190557e10486SAddy Ke dw_mci_set_drto(host); 1906f95f3850SWill Newton break; 190757e10486SAddy Ke } 1908f95f3850SWill Newton 1909f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->completed_events); 19102aa35465SDoug Anderson 19112aa35465SDoug Anderson /* 19122aa35465SDoug Anderson * Handle an EVENT_DATA_ERROR that might have shown up 19132aa35465SDoug Anderson * before the transfer completed. This might not have 19142aa35465SDoug Anderson * been caught by the check above because the interrupt 19152aa35465SDoug Anderson * could have gone off between the previous check and 19162aa35465SDoug Anderson * the check for transfer complete. 19172aa35465SDoug Anderson * 19182aa35465SDoug Anderson * Technically this ought not be needed assuming we 19192aa35465SDoug Anderson * get a DATA_COMPLETE eventually (we'll notice the 19202aa35465SDoug Anderson * error and end the request), but it shouldn't hurt. 19212aa35465SDoug Anderson * 19222aa35465SDoug Anderson * This has the advantage of sending the stop command. 19232aa35465SDoug Anderson */ 19242aa35465SDoug Anderson if (test_and_clear_bit(EVENT_DATA_ERROR, 19252aa35465SDoug Anderson &host->pending_events)) { 19262aa35465SDoug Anderson dw_mci_stop_dma(host); 1927bdb9a90bSaddy ke if (data->stop || 1928bdb9a90bSaddy ke !(host->data_status & (SDMMC_INT_DRTO | 1929bdb9a90bSaddy ke SDMMC_INT_EBE))) 19302aa35465SDoug Anderson send_stop_abort(host, data); 19312aa35465SDoug Anderson state = STATE_DATA_ERROR; 19322aa35465SDoug Anderson break; 19332aa35465SDoug Anderson } 1934f95f3850SWill Newton prev_state = state = STATE_DATA_BUSY; 19352aa35465SDoug Anderson 1936f95f3850SWill Newton /* fall through */ 1937f95f3850SWill Newton 1938f95f3850SWill Newton case STATE_DATA_BUSY: 1939f95f3850SWill Newton if (!test_and_clear_bit(EVENT_DATA_COMPLETE, 194057e10486SAddy Ke &host->pending_events)) { 194157e10486SAddy Ke /* 194257e10486SAddy Ke * If data error interrupt comes but data over 194357e10486SAddy Ke * interrupt doesn't come within the given time. 194457e10486SAddy Ke * in reading data state. 194557e10486SAddy Ke */ 194616a34574SJaehoon Chung if (host->dir_status == DW_MCI_RECV_STATUS) 194757e10486SAddy Ke dw_mci_set_drto(host); 1948f95f3850SWill Newton break; 194957e10486SAddy Ke } 1950f95f3850SWill Newton 1951f95f3850SWill Newton host->data = NULL; 1952f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->completed_events); 1953e352c813SSeungwon Jeon err = dw_mci_data_complete(host, data); 1954f95f3850SWill Newton 1955e352c813SSeungwon Jeon if (!err) { 1956e352c813SSeungwon Jeon if (!data->stop || mrq->sbc) { 195717c8bc85SSachin Kamat if (mrq->sbc && data->stop) 1958053b3ce6SSeungwon Jeon data->stop->error = 0; 1959e352c813SSeungwon Jeon dw_mci_request_end(host, mrq); 1960053b3ce6SSeungwon Jeon goto unlock; 1961053b3ce6SSeungwon Jeon } 1962053b3ce6SSeungwon Jeon 196390c2143aSSeungwon Jeon /* stop command for open-ended transfer*/ 1964e352c813SSeungwon Jeon if (data->stop) 196590c2143aSSeungwon Jeon send_stop_abort(host, data); 19662aa35465SDoug Anderson } else { 19672aa35465SDoug Anderson /* 19682aa35465SDoug Anderson * If we don't have a command complete now we'll 19692aa35465SDoug Anderson * never get one since we just reset everything; 19702aa35465SDoug Anderson * better end the request. 19712aa35465SDoug Anderson * 19722aa35465SDoug Anderson * If we do have a command complete we'll fall 19732aa35465SDoug Anderson * through to the SENDING_STOP command and 19742aa35465SDoug Anderson * everything will be peachy keen. 19752aa35465SDoug Anderson */ 19762aa35465SDoug Anderson if (!test_bit(EVENT_CMD_COMPLETE, 19772aa35465SDoug Anderson &host->pending_events)) { 19782aa35465SDoug Anderson host->cmd = NULL; 19792aa35465SDoug Anderson dw_mci_request_end(host, mrq); 19802aa35465SDoug Anderson goto unlock; 19812aa35465SDoug Anderson } 198290c2143aSSeungwon Jeon } 1983e352c813SSeungwon Jeon 1984e352c813SSeungwon Jeon /* 1985e352c813SSeungwon Jeon * If err has non-zero, 1986e352c813SSeungwon Jeon * stop-abort command has been already issued. 1987e352c813SSeungwon Jeon */ 1988e352c813SSeungwon Jeon prev_state = state = STATE_SENDING_STOP; 1989e352c813SSeungwon Jeon 1990f95f3850SWill Newton /* fall through */ 1991f95f3850SWill Newton 1992f95f3850SWill Newton case STATE_SENDING_STOP: 1993f95f3850SWill Newton if (!test_and_clear_bit(EVENT_CMD_COMPLETE, 1994f95f3850SWill Newton &host->pending_events)) 1995f95f3850SWill Newton break; 1996f95f3850SWill Newton 199771abb133SSeungwon Jeon /* CMD error in data command */ 199831bff450SSeungwon Jeon if (mrq->cmd->error && mrq->data) 19993a33a94cSSonny Rao dw_mci_reset(host); 200071abb133SSeungwon Jeon 2001f95f3850SWill Newton host->cmd = NULL; 200271abb133SSeungwon Jeon host->data = NULL; 200390c2143aSSeungwon Jeon 2004e352c813SSeungwon Jeon if (mrq->stop) 2005e352c813SSeungwon Jeon dw_mci_command_complete(host, mrq->stop); 200690c2143aSSeungwon Jeon else 200790c2143aSSeungwon Jeon host->cmd_status = 0; 200890c2143aSSeungwon Jeon 2009e352c813SSeungwon Jeon dw_mci_request_end(host, mrq); 2010f95f3850SWill Newton goto unlock; 2011f95f3850SWill Newton 2012f95f3850SWill Newton case STATE_DATA_ERROR: 2013f95f3850SWill Newton if (!test_and_clear_bit(EVENT_XFER_COMPLETE, 2014f95f3850SWill Newton &host->pending_events)) 2015f95f3850SWill Newton break; 2016f95f3850SWill Newton 2017f95f3850SWill Newton state = STATE_DATA_BUSY; 2018f95f3850SWill Newton break; 2019f95f3850SWill Newton } 2020f95f3850SWill Newton } while (state != prev_state); 2021f95f3850SWill Newton 2022f95f3850SWill Newton host->state = state; 2023f95f3850SWill Newton unlock: 2024f95f3850SWill Newton spin_unlock(&host->lock); 2025f95f3850SWill Newton 2026f95f3850SWill Newton } 2027f95f3850SWill Newton 202834b664a2SJames Hogan /* push final bytes to part_buf, only use during push */ 202934b664a2SJames Hogan static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt) 203034b664a2SJames Hogan { 203134b664a2SJames Hogan memcpy((void *)&host->part_buf, buf, cnt); 203234b664a2SJames Hogan host->part_buf_count = cnt; 203334b664a2SJames Hogan } 203434b664a2SJames Hogan 203534b664a2SJames Hogan /* append bytes to part_buf, only use during push */ 203634b664a2SJames Hogan static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt) 203734b664a2SJames Hogan { 203834b664a2SJames Hogan cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count); 203934b664a2SJames Hogan memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt); 204034b664a2SJames Hogan host->part_buf_count += cnt; 204134b664a2SJames Hogan return cnt; 204234b664a2SJames Hogan } 204334b664a2SJames Hogan 204434b664a2SJames Hogan /* pull first bytes from part_buf, only use during pull */ 204534b664a2SJames Hogan static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt) 204634b664a2SJames Hogan { 20470e3a22c0SShawn Lin cnt = min_t(int, cnt, host->part_buf_count); 204834b664a2SJames Hogan if (cnt) { 204934b664a2SJames Hogan memcpy(buf, (void *)&host->part_buf + host->part_buf_start, 205034b664a2SJames Hogan cnt); 205134b664a2SJames Hogan host->part_buf_count -= cnt; 205234b664a2SJames Hogan host->part_buf_start += cnt; 205334b664a2SJames Hogan } 205434b664a2SJames Hogan return cnt; 205534b664a2SJames Hogan } 205634b664a2SJames Hogan 205734b664a2SJames Hogan /* pull final bytes from the part_buf, assuming it's just been filled */ 205834b664a2SJames Hogan static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt) 205934b664a2SJames Hogan { 206034b664a2SJames Hogan memcpy(buf, &host->part_buf, cnt); 206134b664a2SJames Hogan host->part_buf_start = cnt; 206234b664a2SJames Hogan host->part_buf_count = (1 << host->data_shift) - cnt; 206334b664a2SJames Hogan } 206434b664a2SJames Hogan 2065f95f3850SWill Newton static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) 2066f95f3850SWill Newton { 2067cfbeb59cSMarkos Chandras struct mmc_data *data = host->data; 2068cfbeb59cSMarkos Chandras int init_cnt = cnt; 2069cfbeb59cSMarkos Chandras 207034b664a2SJames Hogan /* try and push anything in the part_buf */ 207134b664a2SJames Hogan if (unlikely(host->part_buf_count)) { 207234b664a2SJames Hogan int len = dw_mci_push_part_bytes(host, buf, cnt); 20730e3a22c0SShawn Lin 207434b664a2SJames Hogan buf += len; 207534b664a2SJames Hogan cnt -= len; 2076cfbeb59cSMarkos Chandras if (host->part_buf_count == 2) { 207776184ac1SBen Dooks mci_fifo_writew(host->fifo_reg, host->part_buf16); 207834b664a2SJames Hogan host->part_buf_count = 0; 207934b664a2SJames Hogan } 208034b664a2SJames Hogan } 208134b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 208234b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x1)) { 208334b664a2SJames Hogan while (cnt >= 2) { 208434b664a2SJames Hogan u16 aligned_buf[64]; 208534b664a2SJames Hogan int len = min(cnt & -2, (int)sizeof(aligned_buf)); 208634b664a2SJames Hogan int items = len >> 1; 208734b664a2SJames Hogan int i; 208834b664a2SJames Hogan /* memcpy from input buffer into aligned buffer */ 208934b664a2SJames Hogan memcpy(aligned_buf, buf, len); 209034b664a2SJames Hogan buf += len; 209134b664a2SJames Hogan cnt -= len; 209234b664a2SJames Hogan /* push data from aligned buffer into fifo */ 209334b664a2SJames Hogan for (i = 0; i < items; ++i) 209476184ac1SBen Dooks mci_fifo_writew(host->fifo_reg, aligned_buf[i]); 209534b664a2SJames Hogan } 209634b664a2SJames Hogan } else 209734b664a2SJames Hogan #endif 209834b664a2SJames Hogan { 209934b664a2SJames Hogan u16 *pdata = buf; 21000e3a22c0SShawn Lin 210134b664a2SJames Hogan for (; cnt >= 2; cnt -= 2) 210276184ac1SBen Dooks mci_fifo_writew(host->fifo_reg, *pdata++); 210334b664a2SJames Hogan buf = pdata; 210434b664a2SJames Hogan } 210534b664a2SJames Hogan /* put anything remaining in the part_buf */ 210634b664a2SJames Hogan if (cnt) { 210734b664a2SJames Hogan dw_mci_set_part_bytes(host, buf, cnt); 2108cfbeb59cSMarkos Chandras /* Push data if we have reached the expected data length */ 2109cfbeb59cSMarkos Chandras if ((data->bytes_xfered + init_cnt) == 2110cfbeb59cSMarkos Chandras (data->blksz * data->blocks)) 211176184ac1SBen Dooks mci_fifo_writew(host->fifo_reg, host->part_buf16); 2112f95f3850SWill Newton } 2113f95f3850SWill Newton } 2114f95f3850SWill Newton 2115f95f3850SWill Newton static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) 2116f95f3850SWill Newton { 211734b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 211834b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x1)) { 211934b664a2SJames Hogan while (cnt >= 2) { 212034b664a2SJames Hogan /* pull data from fifo into aligned buffer */ 212134b664a2SJames Hogan u16 aligned_buf[64]; 212234b664a2SJames Hogan int len = min(cnt & -2, (int)sizeof(aligned_buf)); 212334b664a2SJames Hogan int items = len >> 1; 212434b664a2SJames Hogan int i; 21250e3a22c0SShawn Lin 212634b664a2SJames Hogan for (i = 0; i < items; ++i) 212776184ac1SBen Dooks aligned_buf[i] = mci_fifo_readw(host->fifo_reg); 212834b664a2SJames Hogan /* memcpy from aligned buffer into output buffer */ 212934b664a2SJames Hogan memcpy(buf, aligned_buf, len); 213034b664a2SJames Hogan buf += len; 213134b664a2SJames Hogan cnt -= len; 213234b664a2SJames Hogan } 213334b664a2SJames Hogan } else 213434b664a2SJames Hogan #endif 213534b664a2SJames Hogan { 213634b664a2SJames Hogan u16 *pdata = buf; 21370e3a22c0SShawn Lin 213834b664a2SJames Hogan for (; cnt >= 2; cnt -= 2) 213976184ac1SBen Dooks *pdata++ = mci_fifo_readw(host->fifo_reg); 214034b664a2SJames Hogan buf = pdata; 214134b664a2SJames Hogan } 214234b664a2SJames Hogan if (cnt) { 214376184ac1SBen Dooks host->part_buf16 = mci_fifo_readw(host->fifo_reg); 214434b664a2SJames Hogan dw_mci_pull_final_bytes(host, buf, cnt); 2145f95f3850SWill Newton } 2146f95f3850SWill Newton } 2147f95f3850SWill Newton 2148f95f3850SWill Newton static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) 2149f95f3850SWill Newton { 2150cfbeb59cSMarkos Chandras struct mmc_data *data = host->data; 2151cfbeb59cSMarkos Chandras int init_cnt = cnt; 2152cfbeb59cSMarkos Chandras 215334b664a2SJames Hogan /* try and push anything in the part_buf */ 215434b664a2SJames Hogan if (unlikely(host->part_buf_count)) { 215534b664a2SJames Hogan int len = dw_mci_push_part_bytes(host, buf, cnt); 21560e3a22c0SShawn Lin 215734b664a2SJames Hogan buf += len; 215834b664a2SJames Hogan cnt -= len; 2159cfbeb59cSMarkos Chandras if (host->part_buf_count == 4) { 216076184ac1SBen Dooks mci_fifo_writel(host->fifo_reg, host->part_buf32); 216134b664a2SJames Hogan host->part_buf_count = 0; 216234b664a2SJames Hogan } 216334b664a2SJames Hogan } 216434b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 216534b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x3)) { 216634b664a2SJames Hogan while (cnt >= 4) { 216734b664a2SJames Hogan u32 aligned_buf[32]; 216834b664a2SJames Hogan int len = min(cnt & -4, (int)sizeof(aligned_buf)); 216934b664a2SJames Hogan int items = len >> 2; 217034b664a2SJames Hogan int i; 217134b664a2SJames Hogan /* memcpy from input buffer into aligned buffer */ 217234b664a2SJames Hogan memcpy(aligned_buf, buf, len); 217334b664a2SJames Hogan buf += len; 217434b664a2SJames Hogan cnt -= len; 217534b664a2SJames Hogan /* push data from aligned buffer into fifo */ 217634b664a2SJames Hogan for (i = 0; i < items; ++i) 217776184ac1SBen Dooks mci_fifo_writel(host->fifo_reg, aligned_buf[i]); 217834b664a2SJames Hogan } 217934b664a2SJames Hogan } else 218034b664a2SJames Hogan #endif 218134b664a2SJames Hogan { 218234b664a2SJames Hogan u32 *pdata = buf; 21830e3a22c0SShawn Lin 218434b664a2SJames Hogan for (; cnt >= 4; cnt -= 4) 218576184ac1SBen Dooks mci_fifo_writel(host->fifo_reg, *pdata++); 218634b664a2SJames Hogan buf = pdata; 218734b664a2SJames Hogan } 218834b664a2SJames Hogan /* put anything remaining in the part_buf */ 218934b664a2SJames Hogan if (cnt) { 219034b664a2SJames Hogan dw_mci_set_part_bytes(host, buf, cnt); 2191cfbeb59cSMarkos Chandras /* Push data if we have reached the expected data length */ 2192cfbeb59cSMarkos Chandras if ((data->bytes_xfered + init_cnt) == 2193cfbeb59cSMarkos Chandras (data->blksz * data->blocks)) 219476184ac1SBen Dooks mci_fifo_writel(host->fifo_reg, host->part_buf32); 2195f95f3850SWill Newton } 2196f95f3850SWill Newton } 2197f95f3850SWill Newton 2198f95f3850SWill Newton static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) 2199f95f3850SWill Newton { 220034b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 220134b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x3)) { 220234b664a2SJames Hogan while (cnt >= 4) { 220334b664a2SJames Hogan /* pull data from fifo into aligned buffer */ 220434b664a2SJames Hogan u32 aligned_buf[32]; 220534b664a2SJames Hogan int len = min(cnt & -4, (int)sizeof(aligned_buf)); 220634b664a2SJames Hogan int items = len >> 2; 220734b664a2SJames Hogan int i; 22080e3a22c0SShawn Lin 220934b664a2SJames Hogan for (i = 0; i < items; ++i) 221076184ac1SBen Dooks aligned_buf[i] = mci_fifo_readl(host->fifo_reg); 221134b664a2SJames Hogan /* memcpy from aligned buffer into output buffer */ 221234b664a2SJames Hogan memcpy(buf, aligned_buf, len); 221334b664a2SJames Hogan buf += len; 221434b664a2SJames Hogan cnt -= len; 221534b664a2SJames Hogan } 221634b664a2SJames Hogan } else 221734b664a2SJames Hogan #endif 221834b664a2SJames Hogan { 221934b664a2SJames Hogan u32 *pdata = buf; 22200e3a22c0SShawn Lin 222134b664a2SJames Hogan for (; cnt >= 4; cnt -= 4) 222276184ac1SBen Dooks *pdata++ = mci_fifo_readl(host->fifo_reg); 222334b664a2SJames Hogan buf = pdata; 222434b664a2SJames Hogan } 222534b664a2SJames Hogan if (cnt) { 222676184ac1SBen Dooks host->part_buf32 = mci_fifo_readl(host->fifo_reg); 222734b664a2SJames Hogan dw_mci_pull_final_bytes(host, buf, cnt); 2228f95f3850SWill Newton } 2229f95f3850SWill Newton } 2230f95f3850SWill Newton 2231f95f3850SWill Newton static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) 2232f95f3850SWill Newton { 2233cfbeb59cSMarkos Chandras struct mmc_data *data = host->data; 2234cfbeb59cSMarkos Chandras int init_cnt = cnt; 2235cfbeb59cSMarkos Chandras 223634b664a2SJames Hogan /* try and push anything in the part_buf */ 223734b664a2SJames Hogan if (unlikely(host->part_buf_count)) { 223834b664a2SJames Hogan int len = dw_mci_push_part_bytes(host, buf, cnt); 22390e3a22c0SShawn Lin 224034b664a2SJames Hogan buf += len; 224134b664a2SJames Hogan cnt -= len; 2242c09fbd74SSeungwon Jeon 2243cfbeb59cSMarkos Chandras if (host->part_buf_count == 8) { 224476184ac1SBen Dooks mci_fifo_writeq(host->fifo_reg, host->part_buf); 224534b664a2SJames Hogan host->part_buf_count = 0; 224634b664a2SJames Hogan } 224734b664a2SJames Hogan } 224834b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 224934b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x7)) { 225034b664a2SJames Hogan while (cnt >= 8) { 225134b664a2SJames Hogan u64 aligned_buf[16]; 225234b664a2SJames Hogan int len = min(cnt & -8, (int)sizeof(aligned_buf)); 225334b664a2SJames Hogan int items = len >> 3; 225434b664a2SJames Hogan int i; 225534b664a2SJames Hogan /* memcpy from input buffer into aligned buffer */ 225634b664a2SJames Hogan memcpy(aligned_buf, buf, len); 225734b664a2SJames Hogan buf += len; 225834b664a2SJames Hogan cnt -= len; 225934b664a2SJames Hogan /* push data from aligned buffer into fifo */ 226034b664a2SJames Hogan for (i = 0; i < items; ++i) 226176184ac1SBen Dooks mci_fifo_writeq(host->fifo_reg, aligned_buf[i]); 226234b664a2SJames Hogan } 226334b664a2SJames Hogan } else 226434b664a2SJames Hogan #endif 226534b664a2SJames Hogan { 226634b664a2SJames Hogan u64 *pdata = buf; 22670e3a22c0SShawn Lin 226834b664a2SJames Hogan for (; cnt >= 8; cnt -= 8) 226976184ac1SBen Dooks mci_fifo_writeq(host->fifo_reg, *pdata++); 227034b664a2SJames Hogan buf = pdata; 227134b664a2SJames Hogan } 227234b664a2SJames Hogan /* put anything remaining in the part_buf */ 227334b664a2SJames Hogan if (cnt) { 227434b664a2SJames Hogan dw_mci_set_part_bytes(host, buf, cnt); 2275cfbeb59cSMarkos Chandras /* Push data if we have reached the expected data length */ 2276cfbeb59cSMarkos Chandras if ((data->bytes_xfered + init_cnt) == 2277cfbeb59cSMarkos Chandras (data->blksz * data->blocks)) 227876184ac1SBen Dooks mci_fifo_writeq(host->fifo_reg, host->part_buf); 2279f95f3850SWill Newton } 2280f95f3850SWill Newton } 2281f95f3850SWill Newton 2282f95f3850SWill Newton static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) 2283f95f3850SWill Newton { 228434b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 228534b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x7)) { 228634b664a2SJames Hogan while (cnt >= 8) { 228734b664a2SJames Hogan /* pull data from fifo into aligned buffer */ 228834b664a2SJames Hogan u64 aligned_buf[16]; 228934b664a2SJames Hogan int len = min(cnt & -8, (int)sizeof(aligned_buf)); 229034b664a2SJames Hogan int items = len >> 3; 229134b664a2SJames Hogan int i; 22920e3a22c0SShawn Lin 229334b664a2SJames Hogan for (i = 0; i < items; ++i) 229476184ac1SBen Dooks aligned_buf[i] = mci_fifo_readq(host->fifo_reg); 229576184ac1SBen Dooks 229634b664a2SJames Hogan /* memcpy from aligned buffer into output buffer */ 229734b664a2SJames Hogan memcpy(buf, aligned_buf, len); 229834b664a2SJames Hogan buf += len; 229934b664a2SJames Hogan cnt -= len; 2300f95f3850SWill Newton } 230134b664a2SJames Hogan } else 230234b664a2SJames Hogan #endif 230334b664a2SJames Hogan { 230434b664a2SJames Hogan u64 *pdata = buf; 23050e3a22c0SShawn Lin 230634b664a2SJames Hogan for (; cnt >= 8; cnt -= 8) 230776184ac1SBen Dooks *pdata++ = mci_fifo_readq(host->fifo_reg); 230834b664a2SJames Hogan buf = pdata; 230934b664a2SJames Hogan } 231034b664a2SJames Hogan if (cnt) { 231176184ac1SBen Dooks host->part_buf = mci_fifo_readq(host->fifo_reg); 231234b664a2SJames Hogan dw_mci_pull_final_bytes(host, buf, cnt); 231334b664a2SJames Hogan } 231434b664a2SJames Hogan } 231534b664a2SJames Hogan 231634b664a2SJames Hogan static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt) 231734b664a2SJames Hogan { 231834b664a2SJames Hogan int len; 231934b664a2SJames Hogan 232034b664a2SJames Hogan /* get remaining partial bytes */ 232134b664a2SJames Hogan len = dw_mci_pull_part_bytes(host, buf, cnt); 232234b664a2SJames Hogan if (unlikely(len == cnt)) 232334b664a2SJames Hogan return; 232434b664a2SJames Hogan buf += len; 232534b664a2SJames Hogan cnt -= len; 232634b664a2SJames Hogan 232734b664a2SJames Hogan /* get the rest of the data */ 232834b664a2SJames Hogan host->pull_data(host, buf, cnt); 2329f95f3850SWill Newton } 2330f95f3850SWill Newton 233187a74d39SKyoungil Kim static void dw_mci_read_data_pio(struct dw_mci *host, bool dto) 2332f95f3850SWill Newton { 2333f9c2a0dcSSeungwon Jeon struct sg_mapping_iter *sg_miter = &host->sg_miter; 2334f9c2a0dcSSeungwon Jeon void *buf; 2335f9c2a0dcSSeungwon Jeon unsigned int offset; 2336f95f3850SWill Newton struct mmc_data *data = host->data; 2337f95f3850SWill Newton int shift = host->data_shift; 2338f95f3850SWill Newton u32 status; 23393e4b0d8bSMarkos Chandras unsigned int len; 2340f9c2a0dcSSeungwon Jeon unsigned int remain, fcnt; 2341f95f3850SWill Newton 2342f95f3850SWill Newton do { 2343f9c2a0dcSSeungwon Jeon if (!sg_miter_next(sg_miter)) 2344f9c2a0dcSSeungwon Jeon goto done; 2345f95f3850SWill Newton 23464225fc85SImre Deak host->sg = sg_miter->piter.sg; 2347f9c2a0dcSSeungwon Jeon buf = sg_miter->addr; 2348f9c2a0dcSSeungwon Jeon remain = sg_miter->length; 2349f9c2a0dcSSeungwon Jeon offset = 0; 2350f9c2a0dcSSeungwon Jeon 2351f9c2a0dcSSeungwon Jeon do { 2352f9c2a0dcSSeungwon Jeon fcnt = (SDMMC_GET_FCNT(mci_readl(host, STATUS)) 2353f9c2a0dcSSeungwon Jeon << shift) + host->part_buf_count; 2354f9c2a0dcSSeungwon Jeon len = min(remain, fcnt); 2355f9c2a0dcSSeungwon Jeon if (!len) 2356f9c2a0dcSSeungwon Jeon break; 2357f9c2a0dcSSeungwon Jeon dw_mci_pull_data(host, (void *)(buf + offset), len); 23583e4b0d8bSMarkos Chandras data->bytes_xfered += len; 2359f95f3850SWill Newton offset += len; 2360f9c2a0dcSSeungwon Jeon remain -= len; 2361f9c2a0dcSSeungwon Jeon } while (remain); 2362f95f3850SWill Newton 2363e74f3a9cSSeungwon Jeon sg_miter->consumed = offset; 2364f95f3850SWill Newton status = mci_readl(host, MINTSTS); 2365f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_RXDR); 236687a74d39SKyoungil Kim /* if the RXDR is ready read again */ 236787a74d39SKyoungil Kim } while ((status & SDMMC_INT_RXDR) || 236887a74d39SKyoungil Kim (dto && SDMMC_GET_FCNT(mci_readl(host, STATUS)))); 2369f9c2a0dcSSeungwon Jeon 2370f9c2a0dcSSeungwon Jeon if (!remain) { 2371f9c2a0dcSSeungwon Jeon if (!sg_miter_next(sg_miter)) 2372f9c2a0dcSSeungwon Jeon goto done; 2373f9c2a0dcSSeungwon Jeon sg_miter->consumed = 0; 2374f9c2a0dcSSeungwon Jeon } 2375f9c2a0dcSSeungwon Jeon sg_miter_stop(sg_miter); 2376f95f3850SWill Newton return; 2377f95f3850SWill Newton 2378f95f3850SWill Newton done: 2379f9c2a0dcSSeungwon Jeon sg_miter_stop(sg_miter); 2380f9c2a0dcSSeungwon Jeon host->sg = NULL; 23810e3a22c0SShawn Lin smp_wmb(); /* drain writebuffer */ 2382f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 2383f95f3850SWill Newton } 2384f95f3850SWill Newton 2385f95f3850SWill Newton static void dw_mci_write_data_pio(struct dw_mci *host) 2386f95f3850SWill Newton { 2387f9c2a0dcSSeungwon Jeon struct sg_mapping_iter *sg_miter = &host->sg_miter; 2388f9c2a0dcSSeungwon Jeon void *buf; 2389f9c2a0dcSSeungwon Jeon unsigned int offset; 2390f95f3850SWill Newton struct mmc_data *data = host->data; 2391f95f3850SWill Newton int shift = host->data_shift; 2392f95f3850SWill Newton u32 status; 23933e4b0d8bSMarkos Chandras unsigned int len; 2394f9c2a0dcSSeungwon Jeon unsigned int fifo_depth = host->fifo_depth; 2395f9c2a0dcSSeungwon Jeon unsigned int remain, fcnt; 2396f95f3850SWill Newton 2397f95f3850SWill Newton do { 2398f9c2a0dcSSeungwon Jeon if (!sg_miter_next(sg_miter)) 2399f9c2a0dcSSeungwon Jeon goto done; 2400f95f3850SWill Newton 24014225fc85SImre Deak host->sg = sg_miter->piter.sg; 2402f9c2a0dcSSeungwon Jeon buf = sg_miter->addr; 2403f9c2a0dcSSeungwon Jeon remain = sg_miter->length; 2404f9c2a0dcSSeungwon Jeon offset = 0; 2405f9c2a0dcSSeungwon Jeon 2406f9c2a0dcSSeungwon Jeon do { 2407f9c2a0dcSSeungwon Jeon fcnt = ((fifo_depth - 2408f9c2a0dcSSeungwon Jeon SDMMC_GET_FCNT(mci_readl(host, STATUS))) 2409f9c2a0dcSSeungwon Jeon << shift) - host->part_buf_count; 2410f9c2a0dcSSeungwon Jeon len = min(remain, fcnt); 2411f9c2a0dcSSeungwon Jeon if (!len) 2412f9c2a0dcSSeungwon Jeon break; 2413f9c2a0dcSSeungwon Jeon host->push_data(host, (void *)(buf + offset), len); 24143e4b0d8bSMarkos Chandras data->bytes_xfered += len; 2415f95f3850SWill Newton offset += len; 2416f9c2a0dcSSeungwon Jeon remain -= len; 2417f9c2a0dcSSeungwon Jeon } while (remain); 2418f95f3850SWill Newton 2419e74f3a9cSSeungwon Jeon sg_miter->consumed = offset; 2420f95f3850SWill Newton status = mci_readl(host, MINTSTS); 2421f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_TXDR); 2422f95f3850SWill Newton } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ 2423f9c2a0dcSSeungwon Jeon 2424f9c2a0dcSSeungwon Jeon if (!remain) { 2425f9c2a0dcSSeungwon Jeon if (!sg_miter_next(sg_miter)) 2426f9c2a0dcSSeungwon Jeon goto done; 2427f9c2a0dcSSeungwon Jeon sg_miter->consumed = 0; 2428f9c2a0dcSSeungwon Jeon } 2429f9c2a0dcSSeungwon Jeon sg_miter_stop(sg_miter); 2430f95f3850SWill Newton return; 2431f95f3850SWill Newton 2432f95f3850SWill Newton done: 2433f9c2a0dcSSeungwon Jeon sg_miter_stop(sg_miter); 2434f9c2a0dcSSeungwon Jeon host->sg = NULL; 24350e3a22c0SShawn Lin smp_wmb(); /* drain writebuffer */ 2436f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 2437f95f3850SWill Newton } 2438f95f3850SWill Newton 2439f95f3850SWill Newton static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) 2440f95f3850SWill Newton { 2441f95f3850SWill Newton if (!host->cmd_status) 2442f95f3850SWill Newton host->cmd_status = status; 2443f95f3850SWill Newton 24440e3a22c0SShawn Lin smp_wmb(); /* drain writebuffer */ 2445f95f3850SWill Newton 2446f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->pending_events); 2447f95f3850SWill Newton tasklet_schedule(&host->tasklet); 2448f95f3850SWill Newton } 2449f95f3850SWill Newton 24506130e7a9SDoug Anderson static void dw_mci_handle_cd(struct dw_mci *host) 24516130e7a9SDoug Anderson { 24526130e7a9SDoug Anderson int i; 24536130e7a9SDoug Anderson 24546130e7a9SDoug Anderson for (i = 0; i < host->num_slots; i++) { 24556130e7a9SDoug Anderson struct dw_mci_slot *slot = host->slot[i]; 24566130e7a9SDoug Anderson 24576130e7a9SDoug Anderson if (!slot) 24586130e7a9SDoug Anderson continue; 24596130e7a9SDoug Anderson 24606130e7a9SDoug Anderson if (slot->mmc->ops->card_event) 24616130e7a9SDoug Anderson slot->mmc->ops->card_event(slot->mmc); 24626130e7a9SDoug Anderson mmc_detect_change(slot->mmc, 24636130e7a9SDoug Anderson msecs_to_jiffies(host->pdata->detect_delay_ms)); 24646130e7a9SDoug Anderson } 24656130e7a9SDoug Anderson } 24666130e7a9SDoug Anderson 2467f95f3850SWill Newton static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) 2468f95f3850SWill Newton { 2469f95f3850SWill Newton struct dw_mci *host = dev_id; 2470182c9081SSeungwon Jeon u32 pending; 24711a5c8e1fSShashidhar Hiremath int i; 2472f95f3850SWill Newton 2473f95f3850SWill Newton pending = mci_readl(host, MINTSTS); /* read-only mask reg */ 2474f95f3850SWill Newton 2475476d79f1SDoug Anderson if (pending) { 247601730558SDoug Anderson /* Check volt switch first, since it can look like an error */ 247701730558SDoug Anderson if ((host->state == STATE_SENDING_CMD11) && 247801730558SDoug Anderson (pending & SDMMC_INT_VOLT_SWITCH)) { 247949ba0302SDoug Anderson unsigned long irqflags; 24805c935165SDoug Anderson 248101730558SDoug Anderson mci_writel(host, RINTSTS, SDMMC_INT_VOLT_SWITCH); 248201730558SDoug Anderson pending &= ~SDMMC_INT_VOLT_SWITCH; 248349ba0302SDoug Anderson 248449ba0302SDoug Anderson /* 248549ba0302SDoug Anderson * Hold the lock; we know cmd11_timer can't be kicked 248649ba0302SDoug Anderson * off after the lock is released, so safe to delete. 248749ba0302SDoug Anderson */ 248849ba0302SDoug Anderson spin_lock_irqsave(&host->irq_lock, irqflags); 248901730558SDoug Anderson dw_mci_cmd_interrupt(host, pending); 249049ba0302SDoug Anderson spin_unlock_irqrestore(&host->irq_lock, irqflags); 249149ba0302SDoug Anderson 249249ba0302SDoug Anderson del_timer(&host->cmd11_timer); 249301730558SDoug Anderson } 249401730558SDoug Anderson 2495f95f3850SWill Newton if (pending & DW_MCI_CMD_ERROR_FLAGS) { 2496f95f3850SWill Newton mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); 2497182c9081SSeungwon Jeon host->cmd_status = pending; 24980e3a22c0SShawn Lin smp_wmb(); /* drain writebuffer */ 2499f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->pending_events); 2500f95f3850SWill Newton } 2501f95f3850SWill Newton 2502f95f3850SWill Newton if (pending & DW_MCI_DATA_ERROR_FLAGS) { 2503f95f3850SWill Newton /* if there is an error report DATA_ERROR */ 2504f95f3850SWill Newton mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); 2505182c9081SSeungwon Jeon host->data_status = pending; 25060e3a22c0SShawn Lin smp_wmb(); /* drain writebuffer */ 2507f95f3850SWill Newton set_bit(EVENT_DATA_ERROR, &host->pending_events); 2508f95f3850SWill Newton tasklet_schedule(&host->tasklet); 2509f95f3850SWill Newton } 2510f95f3850SWill Newton 2511f95f3850SWill Newton if (pending & SDMMC_INT_DATA_OVER) { 251257e10486SAddy Ke del_timer(&host->dto_timer); 251357e10486SAddy Ke 2514f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); 2515f95f3850SWill Newton if (!host->data_status) 2516182c9081SSeungwon Jeon host->data_status = pending; 25170e3a22c0SShawn Lin smp_wmb(); /* drain writebuffer */ 2518f95f3850SWill Newton if (host->dir_status == DW_MCI_RECV_STATUS) { 2519f95f3850SWill Newton if (host->sg != NULL) 252087a74d39SKyoungil Kim dw_mci_read_data_pio(host, true); 2521f95f3850SWill Newton } 2522f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->pending_events); 2523f95f3850SWill Newton tasklet_schedule(&host->tasklet); 2524f95f3850SWill Newton } 2525f95f3850SWill Newton 2526f95f3850SWill Newton if (pending & SDMMC_INT_RXDR) { 2527f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_RXDR); 2528b40af3aaSJames Hogan if (host->dir_status == DW_MCI_RECV_STATUS && host->sg) 252987a74d39SKyoungil Kim dw_mci_read_data_pio(host, false); 2530f95f3850SWill Newton } 2531f95f3850SWill Newton 2532f95f3850SWill Newton if (pending & SDMMC_INT_TXDR) { 2533f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_TXDR); 2534b40af3aaSJames Hogan if (host->dir_status == DW_MCI_SEND_STATUS && host->sg) 2535f95f3850SWill Newton dw_mci_write_data_pio(host); 2536f95f3850SWill Newton } 2537f95f3850SWill Newton 2538f95f3850SWill Newton if (pending & SDMMC_INT_CMD_DONE) { 2539f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); 2540182c9081SSeungwon Jeon dw_mci_cmd_interrupt(host, pending); 2541f95f3850SWill Newton } 2542f95f3850SWill Newton 2543f95f3850SWill Newton if (pending & SDMMC_INT_CD) { 2544f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_CD); 25456130e7a9SDoug Anderson dw_mci_handle_cd(host); 2546f95f3850SWill Newton } 2547f95f3850SWill Newton 25481a5c8e1fSShashidhar Hiremath /* Handle SDIO Interrupts */ 25491a5c8e1fSShashidhar Hiremath for (i = 0; i < host->num_slots; i++) { 25501a5c8e1fSShashidhar Hiremath struct dw_mci_slot *slot = host->slot[i]; 2551ed2540efSDoug Anderson 2552ed2540efSDoug Anderson if (!slot) 2553ed2540efSDoug Anderson continue; 2554ed2540efSDoug Anderson 255576756234SAddy Ke if (pending & SDMMC_INT_SDIO(slot->sdio_id)) { 255676756234SAddy Ke mci_writel(host, RINTSTS, 255776756234SAddy Ke SDMMC_INT_SDIO(slot->sdio_id)); 25581a5c8e1fSShashidhar Hiremath mmc_signal_sdio_irq(slot->mmc); 25591a5c8e1fSShashidhar Hiremath } 25601a5c8e1fSShashidhar Hiremath } 25611a5c8e1fSShashidhar Hiremath 25621fb5f68aSMarkos Chandras } 2563f95f3850SWill Newton 25643fc7eaefSShawn Lin if (host->use_dma != TRANS_MODE_IDMAC) 25653fc7eaefSShawn Lin return IRQ_HANDLED; 25663fc7eaefSShawn Lin 25673fc7eaefSShawn Lin /* Handle IDMA interrupts */ 256869d99fdcSPrabu Thangamuthu if (host->dma_64bit_address == 1) { 256969d99fdcSPrabu Thangamuthu pending = mci_readl(host, IDSTS64); 257069d99fdcSPrabu Thangamuthu if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { 257169d99fdcSPrabu Thangamuthu mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_TI | 257269d99fdcSPrabu Thangamuthu SDMMC_IDMAC_INT_RI); 257369d99fdcSPrabu Thangamuthu mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_NI); 2574faecf411SShawn Lin if (!test_bit(EVENT_DATA_ERROR, &host->pending_events)) 25753fc7eaefSShawn Lin host->dma_ops->complete((void *)host); 257669d99fdcSPrabu Thangamuthu } 257769d99fdcSPrabu Thangamuthu } else { 2578f95f3850SWill Newton pending = mci_readl(host, IDSTS); 2579f95f3850SWill Newton if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { 258069d99fdcSPrabu Thangamuthu mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | 258169d99fdcSPrabu Thangamuthu SDMMC_IDMAC_INT_RI); 2582f95f3850SWill Newton mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); 2583faecf411SShawn Lin if (!test_bit(EVENT_DATA_ERROR, &host->pending_events)) 25843fc7eaefSShawn Lin host->dma_ops->complete((void *)host); 2585f95f3850SWill Newton } 258669d99fdcSPrabu Thangamuthu } 2587f95f3850SWill Newton 2588f95f3850SWill Newton return IRQ_HANDLED; 2589f95f3850SWill Newton } 2590f95f3850SWill Newton 259136c179a9SJaehoon Chung static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) 2592f95f3850SWill Newton { 2593f95f3850SWill Newton struct mmc_host *mmc; 2594f95f3850SWill Newton struct dw_mci_slot *slot; 2595e95baf13SArnd Bergmann const struct dw_mci_drv_data *drv_data = host->drv_data; 2596800d78bfSThomas Abraham int ctrl_id, ret; 25971f44a2a5SSeungwon Jeon u32 freq[2]; 2598f95f3850SWill Newton 25994a90920cSThomas Abraham mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev); 2600f95f3850SWill Newton if (!mmc) 2601f95f3850SWill Newton return -ENOMEM; 2602f95f3850SWill Newton 2603f95f3850SWill Newton slot = mmc_priv(mmc); 2604f95f3850SWill Newton slot->id = id; 260576756234SAddy Ke slot->sdio_id = host->sdio_id0 + id; 2606f95f3850SWill Newton slot->mmc = mmc; 2607f95f3850SWill Newton slot->host = host; 2608c91eab4bSThomas Abraham host->slot[id] = slot; 2609f95f3850SWill Newton 2610f95f3850SWill Newton mmc->ops = &dw_mci_ops; 26111f44a2a5SSeungwon Jeon if (of_property_read_u32_array(host->dev->of_node, 26121f44a2a5SSeungwon Jeon "clock-freq-min-max", freq, 2)) { 26131f44a2a5SSeungwon Jeon mmc->f_min = DW_MCI_FREQ_MIN; 26141f44a2a5SSeungwon Jeon mmc->f_max = DW_MCI_FREQ_MAX; 26151f44a2a5SSeungwon Jeon } else { 26161f44a2a5SSeungwon Jeon mmc->f_min = freq[0]; 26171f44a2a5SSeungwon Jeon mmc->f_max = freq[1]; 26181f44a2a5SSeungwon Jeon } 2619f95f3850SWill Newton 262051da2240SYuvaraj CD /*if there are external regulators, get them*/ 262151da2240SYuvaraj CD ret = mmc_regulator_get_supply(mmc); 262251da2240SYuvaraj CD if (ret == -EPROBE_DEFER) 26233cf890fcSDoug Anderson goto err_host_allocated; 262451da2240SYuvaraj CD 262551da2240SYuvaraj CD if (!mmc->ocr_avail) 2626f95f3850SWill Newton mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 2627f95f3850SWill Newton 2628fc3d7720SJaehoon Chung if (host->pdata->caps) 2629fc3d7720SJaehoon Chung mmc->caps = host->pdata->caps; 2630fc3d7720SJaehoon Chung 26316024e166SJaehoon Chung /* 26326024e166SJaehoon Chung * Support MMC_CAP_ERASE by default. 26336024e166SJaehoon Chung * It needs to use trim/discard/erase commands. 26346024e166SJaehoon Chung */ 26356024e166SJaehoon Chung mmc->caps |= MMC_CAP_ERASE; 26366024e166SJaehoon Chung 2637ab269128SAbhilash Kesavan if (host->pdata->pm_caps) 2638ab269128SAbhilash Kesavan mmc->pm_caps = host->pdata->pm_caps; 2639ab269128SAbhilash Kesavan 2640800d78bfSThomas Abraham if (host->dev->of_node) { 2641800d78bfSThomas Abraham ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); 2642800d78bfSThomas Abraham if (ctrl_id < 0) 2643800d78bfSThomas Abraham ctrl_id = 0; 2644800d78bfSThomas Abraham } else { 2645800d78bfSThomas Abraham ctrl_id = to_platform_device(host->dev)->id; 2646800d78bfSThomas Abraham } 2647cb27a843SJames Hogan if (drv_data && drv_data->caps) 2648cb27a843SJames Hogan mmc->caps |= drv_data->caps[ctrl_id]; 2649800d78bfSThomas Abraham 26504f408cc6SSeungwon Jeon if (host->pdata->caps2) 26514f408cc6SSeungwon Jeon mmc->caps2 = host->pdata->caps2; 26524f408cc6SSeungwon Jeon 26533cf890fcSDoug Anderson ret = mmc_of_parse(mmc); 26543cf890fcSDoug Anderson if (ret) 26553cf890fcSDoug Anderson goto err_host_allocated; 2656f95f3850SWill Newton 2657f95f3850SWill Newton /* Useful defaults if platform data is unset. */ 26583fc7eaefSShawn Lin if (host->use_dma == TRANS_MODE_IDMAC) { 2659a39e5746SJaehoon Chung mmc->max_segs = host->ring_size; 2660225faf87SJaehoon Chung mmc->max_blk_size = 65535; 2661575c319dSHeiko Stuebner mmc->max_seg_size = 0x1000; 26621a25b1b4SSeungwon Jeon mmc->max_req_size = mmc->max_seg_size * host->ring_size; 26631a25b1b4SSeungwon Jeon mmc->max_blk_count = mmc->max_req_size / 512; 26643fc7eaefSShawn Lin } else if (host->use_dma == TRANS_MODE_EDMAC) { 26653fc7eaefSShawn Lin mmc->max_segs = 64; 2666225faf87SJaehoon Chung mmc->max_blk_size = 65535; 26673fc7eaefSShawn Lin mmc->max_blk_count = 65535; 26683fc7eaefSShawn Lin mmc->max_req_size = 26693fc7eaefSShawn Lin mmc->max_blk_size * mmc->max_blk_count; 26703fc7eaefSShawn Lin mmc->max_seg_size = mmc->max_req_size; 2671575c319dSHeiko Stuebner } else { 26723fc7eaefSShawn Lin /* TRANS_MODE_PIO */ 2673f95f3850SWill Newton mmc->max_segs = 64; 2674225faf87SJaehoon Chung mmc->max_blk_size = 65535; /* BLKSIZ is 16 bits */ 2675f95f3850SWill Newton mmc->max_blk_count = 512; 2676575c319dSHeiko Stuebner mmc->max_req_size = mmc->max_blk_size * 2677575c319dSHeiko Stuebner mmc->max_blk_count; 2678f95f3850SWill Newton mmc->max_seg_size = mmc->max_req_size; 2679575c319dSHeiko Stuebner } 2680f95f3850SWill Newton 2681c0834a58SShawn Lin dw_mci_get_cd(mmc); 2682ae0eb348SJaehoon Chung 26830cea529dSJaehoon Chung ret = mmc_add_host(mmc); 26840cea529dSJaehoon Chung if (ret) 26853cf890fcSDoug Anderson goto err_host_allocated; 2686f95f3850SWill Newton 2687f95f3850SWill Newton #if defined(CONFIG_DEBUG_FS) 2688f95f3850SWill Newton dw_mci_init_debugfs(slot); 2689f95f3850SWill Newton #endif 2690f95f3850SWill Newton 2691f95f3850SWill Newton return 0; 2692800d78bfSThomas Abraham 26933cf890fcSDoug Anderson err_host_allocated: 2694800d78bfSThomas Abraham mmc_free_host(mmc); 269551da2240SYuvaraj CD return ret; 2696f95f3850SWill Newton } 2697f95f3850SWill Newton 2698f95f3850SWill Newton static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) 2699f95f3850SWill Newton { 2700f95f3850SWill Newton /* Debugfs stuff is cleaned up by mmc core */ 2701f95f3850SWill Newton mmc_remove_host(slot->mmc); 2702f95f3850SWill Newton slot->host->slot[id] = NULL; 2703f95f3850SWill Newton mmc_free_host(slot->mmc); 2704f95f3850SWill Newton } 2705f95f3850SWill Newton 2706f95f3850SWill Newton static void dw_mci_init_dma(struct dw_mci *host) 2707f95f3850SWill Newton { 270869d99fdcSPrabu Thangamuthu int addr_config; 27093fc7eaefSShawn Lin struct device *dev = host->dev; 27103fc7eaefSShawn Lin struct device_node *np = dev->of_node; 27113fc7eaefSShawn Lin 27123fc7eaefSShawn Lin /* 27133fc7eaefSShawn Lin * Check tansfer mode from HCON[17:16] 27143fc7eaefSShawn Lin * Clear the ambiguous description of dw_mmc databook: 27153fc7eaefSShawn Lin * 2b'00: No DMA Interface -> Actually means using Internal DMA block 27163fc7eaefSShawn Lin * 2b'01: DesignWare DMA Interface -> Synopsys DW-DMA block 27173fc7eaefSShawn Lin * 2b'10: Generic DMA Interface -> non-Synopsys generic DMA block 27183fc7eaefSShawn Lin * 2b'11: Non DW DMA Interface -> pio only 27193fc7eaefSShawn Lin * Compared to DesignWare DMA Interface, Generic DMA Interface has a 27203fc7eaefSShawn Lin * simpler request/acknowledge handshake mechanism and both of them 27213fc7eaefSShawn Lin * are regarded as external dma master for dw_mmc. 27223fc7eaefSShawn Lin */ 27233fc7eaefSShawn Lin host->use_dma = SDMMC_GET_TRANS_MODE(mci_readl(host, HCON)); 27243fc7eaefSShawn Lin if (host->use_dma == DMA_INTERFACE_IDMA) { 27253fc7eaefSShawn Lin host->use_dma = TRANS_MODE_IDMAC; 27263fc7eaefSShawn Lin } else if (host->use_dma == DMA_INTERFACE_DWDMA || 27273fc7eaefSShawn Lin host->use_dma == DMA_INTERFACE_GDMA) { 27283fc7eaefSShawn Lin host->use_dma = TRANS_MODE_EDMAC; 27293fc7eaefSShawn Lin } else { 27303fc7eaefSShawn Lin goto no_dma; 27313fc7eaefSShawn Lin } 27323fc7eaefSShawn Lin 27333fc7eaefSShawn Lin /* Determine which DMA interface to use */ 27343fc7eaefSShawn Lin if (host->use_dma == TRANS_MODE_IDMAC) { 27353fc7eaefSShawn Lin /* 27363fc7eaefSShawn Lin * Check ADDR_CONFIG bit in HCON to find 27373fc7eaefSShawn Lin * IDMAC address bus width 27383fc7eaefSShawn Lin */ 273970692752SShawn Lin addr_config = SDMMC_GET_ADDR_CONFIG(mci_readl(host, HCON)); 274069d99fdcSPrabu Thangamuthu 274169d99fdcSPrabu Thangamuthu if (addr_config == 1) { 274269d99fdcSPrabu Thangamuthu /* host supports IDMAC in 64-bit address mode */ 274369d99fdcSPrabu Thangamuthu host->dma_64bit_address = 1; 27443fc7eaefSShawn Lin dev_info(host->dev, 27453fc7eaefSShawn Lin "IDMAC supports 64-bit address mode.\n"); 274669d99fdcSPrabu Thangamuthu if (!dma_set_mask(host->dev, DMA_BIT_MASK(64))) 27473fc7eaefSShawn Lin dma_set_coherent_mask(host->dev, 27483fc7eaefSShawn Lin DMA_BIT_MASK(64)); 274969d99fdcSPrabu Thangamuthu } else { 275069d99fdcSPrabu Thangamuthu /* host supports IDMAC in 32-bit address mode */ 275169d99fdcSPrabu Thangamuthu host->dma_64bit_address = 0; 27523fc7eaefSShawn Lin dev_info(host->dev, 27533fc7eaefSShawn Lin "IDMAC supports 32-bit address mode.\n"); 275469d99fdcSPrabu Thangamuthu } 275569d99fdcSPrabu Thangamuthu 2756f95f3850SWill Newton /* Alloc memory for sg translation */ 2757780f22afSSeungwon Jeon host->sg_cpu = dmam_alloc_coherent(host->dev, PAGE_SIZE, 2758f95f3850SWill Newton &host->sg_dma, GFP_KERNEL); 2759f95f3850SWill Newton if (!host->sg_cpu) { 27603fc7eaefSShawn Lin dev_err(host->dev, 27613fc7eaefSShawn Lin "%s: could not alloc DMA memory\n", 2762f95f3850SWill Newton __func__); 2763f95f3850SWill Newton goto no_dma; 2764f95f3850SWill Newton } 2765f95f3850SWill Newton 2766f95f3850SWill Newton host->dma_ops = &dw_mci_idmac_ops; 276700956ea3SSeungwon Jeon dev_info(host->dev, "Using internal DMA controller.\n"); 27683fc7eaefSShawn Lin } else { 27693fc7eaefSShawn Lin /* TRANS_MODE_EDMAC: check dma bindings again */ 27703fc7eaefSShawn Lin if ((of_property_count_strings(np, "dma-names") < 0) || 27713fc7eaefSShawn Lin (!of_find_property(np, "dmas", NULL))) { 2772f95f3850SWill Newton goto no_dma; 27733fc7eaefSShawn Lin } 27743fc7eaefSShawn Lin host->dma_ops = &dw_mci_edmac_ops; 27753fc7eaefSShawn Lin dev_info(host->dev, "Using external DMA controller.\n"); 27763fc7eaefSShawn Lin } 2777f95f3850SWill Newton 2778e1631f98SJaehoon Chung if (host->dma_ops->init && host->dma_ops->start && 2779e1631f98SJaehoon Chung host->dma_ops->stop && host->dma_ops->cleanup) { 2780f95f3850SWill Newton if (host->dma_ops->init(host)) { 27810e3a22c0SShawn Lin dev_err(host->dev, "%s: Unable to initialize DMA Controller.\n", 27820e3a22c0SShawn Lin __func__); 2783f95f3850SWill Newton goto no_dma; 2784f95f3850SWill Newton } 2785f95f3850SWill Newton } else { 27864a90920cSThomas Abraham dev_err(host->dev, "DMA initialization not found.\n"); 2787f95f3850SWill Newton goto no_dma; 2788f95f3850SWill Newton } 2789f95f3850SWill Newton 2790f95f3850SWill Newton return; 2791f95f3850SWill Newton 2792f95f3850SWill Newton no_dma: 27934a90920cSThomas Abraham dev_info(host->dev, "Using PIO mode.\n"); 27943fc7eaefSShawn Lin host->use_dma = TRANS_MODE_PIO; 2795f95f3850SWill Newton } 2796f95f3850SWill Newton 279731bff450SSeungwon Jeon static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset) 2798f95f3850SWill Newton { 2799f95f3850SWill Newton unsigned long timeout = jiffies + msecs_to_jiffies(500); 280031bff450SSeungwon Jeon u32 ctrl; 2801f95f3850SWill Newton 280231bff450SSeungwon Jeon ctrl = mci_readl(host, CTRL); 280331bff450SSeungwon Jeon ctrl |= reset; 280431bff450SSeungwon Jeon mci_writel(host, CTRL, ctrl); 2805f95f3850SWill Newton 2806f95f3850SWill Newton /* wait till resets clear */ 2807f95f3850SWill Newton do { 2808f95f3850SWill Newton ctrl = mci_readl(host, CTRL); 280931bff450SSeungwon Jeon if (!(ctrl & reset)) 2810f95f3850SWill Newton return true; 2811f95f3850SWill Newton } while (time_before(jiffies, timeout)); 2812f95f3850SWill Newton 281331bff450SSeungwon Jeon dev_err(host->dev, 281431bff450SSeungwon Jeon "Timeout resetting block (ctrl reset %#x)\n", 281531bff450SSeungwon Jeon ctrl & reset); 2816f95f3850SWill Newton 2817f95f3850SWill Newton return false; 2818f95f3850SWill Newton } 2819f95f3850SWill Newton 28203a33a94cSSonny Rao static bool dw_mci_reset(struct dw_mci *host) 282131bff450SSeungwon Jeon { 28223a33a94cSSonny Rao u32 flags = SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET; 28233a33a94cSSonny Rao bool ret = false; 28243a33a94cSSonny Rao 282531bff450SSeungwon Jeon /* 282631bff450SSeungwon Jeon * Reseting generates a block interrupt, hence setting 282731bff450SSeungwon Jeon * the scatter-gather pointer to NULL. 282831bff450SSeungwon Jeon */ 282931bff450SSeungwon Jeon if (host->sg) { 283031bff450SSeungwon Jeon sg_miter_stop(&host->sg_miter); 283131bff450SSeungwon Jeon host->sg = NULL; 283231bff450SSeungwon Jeon } 283331bff450SSeungwon Jeon 28343a33a94cSSonny Rao if (host->use_dma) 28353a33a94cSSonny Rao flags |= SDMMC_CTRL_DMA_RESET; 28363a33a94cSSonny Rao 28373a33a94cSSonny Rao if (dw_mci_ctrl_reset(host, flags)) { 28383a33a94cSSonny Rao /* 28393a33a94cSSonny Rao * In all cases we clear the RAWINTS register to clear any 28403a33a94cSSonny Rao * interrupts. 28413a33a94cSSonny Rao */ 28423a33a94cSSonny Rao mci_writel(host, RINTSTS, 0xFFFFFFFF); 28433a33a94cSSonny Rao 28443a33a94cSSonny Rao /* if using dma we wait for dma_req to clear */ 28453a33a94cSSonny Rao if (host->use_dma) { 28463a33a94cSSonny Rao unsigned long timeout = jiffies + msecs_to_jiffies(500); 28473a33a94cSSonny Rao u32 status; 28480e3a22c0SShawn Lin 28493a33a94cSSonny Rao do { 28503a33a94cSSonny Rao status = mci_readl(host, STATUS); 28513a33a94cSSonny Rao if (!(status & SDMMC_STATUS_DMA_REQ)) 28523a33a94cSSonny Rao break; 28533a33a94cSSonny Rao cpu_relax(); 28543a33a94cSSonny Rao } while (time_before(jiffies, timeout)); 28553a33a94cSSonny Rao 28563a33a94cSSonny Rao if (status & SDMMC_STATUS_DMA_REQ) { 28573a33a94cSSonny Rao dev_err(host->dev, 28580e3a22c0SShawn Lin "%s: Timeout waiting for dma_req to clear during reset\n", 28590e3a22c0SShawn Lin __func__); 28603a33a94cSSonny Rao goto ciu_out; 286131bff450SSeungwon Jeon } 286231bff450SSeungwon Jeon 28633a33a94cSSonny Rao /* when using DMA next we reset the fifo again */ 28643a33a94cSSonny Rao if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET)) 28653a33a94cSSonny Rao goto ciu_out; 28663a33a94cSSonny Rao } 28673a33a94cSSonny Rao } else { 28683a33a94cSSonny Rao /* if the controller reset bit did clear, then set clock regs */ 28693a33a94cSSonny Rao if (!(mci_readl(host, CTRL) & SDMMC_CTRL_RESET)) { 28700e3a22c0SShawn Lin dev_err(host->dev, 28710e3a22c0SShawn Lin "%s: fifo/dma reset bits didn't clear but ciu was reset, doing clock update\n", 28723a33a94cSSonny Rao __func__); 28733a33a94cSSonny Rao goto ciu_out; 28743a33a94cSSonny Rao } 28753a33a94cSSonny Rao } 28763a33a94cSSonny Rao 28773fc7eaefSShawn Lin if (host->use_dma == TRANS_MODE_IDMAC) 28783a33a94cSSonny Rao /* It is also recommended that we reset and reprogram idmac */ 28793a33a94cSSonny Rao dw_mci_idmac_reset(host); 28803a33a94cSSonny Rao 28813a33a94cSSonny Rao ret = true; 28823a33a94cSSonny Rao 28833a33a94cSSonny Rao ciu_out: 28843a33a94cSSonny Rao /* After a CTRL reset we need to have CIU set clock registers */ 28853a33a94cSSonny Rao mci_send_cmd(host->cur_slot, SDMMC_CMD_UPD_CLK, 0); 28863a33a94cSSonny Rao 28873a33a94cSSonny Rao return ret; 288831bff450SSeungwon Jeon } 288931bff450SSeungwon Jeon 28905c935165SDoug Anderson static void dw_mci_cmd11_timer(unsigned long arg) 28915c935165SDoug Anderson { 28925c935165SDoug Anderson struct dw_mci *host = (struct dw_mci *)arg; 28935c935165SDoug Anderson 2894fd674198SDoug Anderson if (host->state != STATE_SENDING_CMD11) { 2895fd674198SDoug Anderson dev_warn(host->dev, "Unexpected CMD11 timeout\n"); 2896fd674198SDoug Anderson return; 2897fd674198SDoug Anderson } 28985c935165SDoug Anderson 28995c935165SDoug Anderson host->cmd_status = SDMMC_INT_RTO; 29005c935165SDoug Anderson set_bit(EVENT_CMD_COMPLETE, &host->pending_events); 29015c935165SDoug Anderson tasklet_schedule(&host->tasklet); 29025c935165SDoug Anderson } 29035c935165SDoug Anderson 290457e10486SAddy Ke static void dw_mci_dto_timer(unsigned long arg) 290557e10486SAddy Ke { 290657e10486SAddy Ke struct dw_mci *host = (struct dw_mci *)arg; 290757e10486SAddy Ke 290857e10486SAddy Ke switch (host->state) { 290957e10486SAddy Ke case STATE_SENDING_DATA: 291057e10486SAddy Ke case STATE_DATA_BUSY: 291157e10486SAddy Ke /* 291257e10486SAddy Ke * If DTO interrupt does NOT come in sending data state, 291357e10486SAddy Ke * we should notify the driver to terminate current transfer 291457e10486SAddy Ke * and report a data timeout to the core. 291557e10486SAddy Ke */ 291657e10486SAddy Ke host->data_status = SDMMC_INT_DRTO; 291757e10486SAddy Ke set_bit(EVENT_DATA_ERROR, &host->pending_events); 291857e10486SAddy Ke set_bit(EVENT_DATA_COMPLETE, &host->pending_events); 291957e10486SAddy Ke tasklet_schedule(&host->tasklet); 292057e10486SAddy Ke break; 292157e10486SAddy Ke default: 292257e10486SAddy Ke break; 292357e10486SAddy Ke } 292457e10486SAddy Ke } 292557e10486SAddy Ke 2926c91eab4bSThomas Abraham #ifdef CONFIG_OF 2927c91eab4bSThomas Abraham static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) 2928c91eab4bSThomas Abraham { 2929c91eab4bSThomas Abraham struct dw_mci_board *pdata; 2930c91eab4bSThomas Abraham struct device *dev = host->dev; 2931c91eab4bSThomas Abraham struct device_node *np = dev->of_node; 2932e95baf13SArnd Bergmann const struct dw_mci_drv_data *drv_data = host->drv_data; 2933e8cc37b8SShawn Lin int ret; 29343c6d89eaSDoug Anderson u32 clock_frequency; 2935c91eab4bSThomas Abraham 2936c91eab4bSThomas Abraham pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 2937bf3707eaSBeomho Seo if (!pdata) 2938c91eab4bSThomas Abraham return ERR_PTR(-ENOMEM); 2939c91eab4bSThomas Abraham 2940d6786fefSGuodong Xu /* find reset controller when exist */ 2941d6786fefSGuodong Xu pdata->rstc = devm_reset_control_get_optional(dev, NULL); 2942d6786fefSGuodong Xu if (IS_ERR(pdata->rstc)) { 2943d6786fefSGuodong Xu if (PTR_ERR(pdata->rstc) == -EPROBE_DEFER) 2944d6786fefSGuodong Xu return ERR_PTR(-EPROBE_DEFER); 2945d6786fefSGuodong Xu } 2946d6786fefSGuodong Xu 2947c91eab4bSThomas Abraham /* find out number of slots supported */ 29488a629d26SShawn Lin of_property_read_u32(np, "num-slots", &pdata->num_slots); 2949c91eab4bSThomas Abraham 2950c91eab4bSThomas Abraham if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth)) 29510e3a22c0SShawn Lin dev_info(dev, 29520e3a22c0SShawn Lin "fifo-depth property not found, using value of FIFOTH register as default\n"); 2953c91eab4bSThomas Abraham 2954c91eab4bSThomas Abraham of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms); 2955c91eab4bSThomas Abraham 29563c6d89eaSDoug Anderson if (!of_property_read_u32(np, "clock-frequency", &clock_frequency)) 29573c6d89eaSDoug Anderson pdata->bus_hz = clock_frequency; 29583c6d89eaSDoug Anderson 2959cb27a843SJames Hogan if (drv_data && drv_data->parse_dt) { 2960cb27a843SJames Hogan ret = drv_data->parse_dt(host); 2961800d78bfSThomas Abraham if (ret) 2962800d78bfSThomas Abraham return ERR_PTR(ret); 2963800d78bfSThomas Abraham } 2964800d78bfSThomas Abraham 296540a7a463SJaehoon Chung if (of_find_property(np, "supports-highspeed", NULL)) { 296640a7a463SJaehoon Chung dev_info(dev, "supports-highspeed property is deprecated.\n"); 296710b49841SSeungwon Jeon pdata->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; 296840a7a463SJaehoon Chung } 296910b49841SSeungwon Jeon 2970c91eab4bSThomas Abraham return pdata; 2971c91eab4bSThomas Abraham } 2972c91eab4bSThomas Abraham 2973c91eab4bSThomas Abraham #else /* CONFIG_OF */ 2974c91eab4bSThomas Abraham static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) 2975c91eab4bSThomas Abraham { 2976c91eab4bSThomas Abraham return ERR_PTR(-EINVAL); 2977c91eab4bSThomas Abraham } 2978c91eab4bSThomas Abraham #endif /* CONFIG_OF */ 2979c91eab4bSThomas Abraham 2980fa0c3283SDoug Anderson static void dw_mci_enable_cd(struct dw_mci *host) 2981fa0c3283SDoug Anderson { 2982fa0c3283SDoug Anderson unsigned long irqflags; 2983fa0c3283SDoug Anderson u32 temp; 2984fa0c3283SDoug Anderson int i; 2985e8cc37b8SShawn Lin struct dw_mci_slot *slot; 2986fa0c3283SDoug Anderson 2987e8cc37b8SShawn Lin /* 2988e8cc37b8SShawn Lin * No need for CD if all slots have a non-error GPIO 2989e8cc37b8SShawn Lin * as well as broken card detection is found. 2990e8cc37b8SShawn Lin */ 2991fa0c3283SDoug Anderson for (i = 0; i < host->num_slots; i++) { 2992e8cc37b8SShawn Lin slot = host->slot[i]; 2993e8cc37b8SShawn Lin if (slot->mmc->caps & MMC_CAP_NEEDS_POLL) 2994e8cc37b8SShawn Lin return; 2995fa0c3283SDoug Anderson 2996287980e4SArnd Bergmann if (mmc_gpio_get_cd(slot->mmc) < 0) 2997fa0c3283SDoug Anderson break; 2998fa0c3283SDoug Anderson } 2999fa0c3283SDoug Anderson if (i == host->num_slots) 3000fa0c3283SDoug Anderson return; 3001fa0c3283SDoug Anderson 3002fa0c3283SDoug Anderson spin_lock_irqsave(&host->irq_lock, irqflags); 3003fa0c3283SDoug Anderson temp = mci_readl(host, INTMASK); 3004fa0c3283SDoug Anderson temp |= SDMMC_INT_CD; 3005fa0c3283SDoug Anderson mci_writel(host, INTMASK, temp); 3006fa0c3283SDoug Anderson spin_unlock_irqrestore(&host->irq_lock, irqflags); 3007fa0c3283SDoug Anderson } 3008fa0c3283SDoug Anderson 300962ca8034SShashidhar Hiremath int dw_mci_probe(struct dw_mci *host) 3010f95f3850SWill Newton { 3011e95baf13SArnd Bergmann const struct dw_mci_drv_data *drv_data = host->drv_data; 301262ca8034SShashidhar Hiremath int width, i, ret = 0; 3013f95f3850SWill Newton u32 fifo_size; 30141c2215b7SThomas Abraham int init_slots = 0; 3015f95f3850SWill Newton 3016c91eab4bSThomas Abraham if (!host->pdata) { 3017c91eab4bSThomas Abraham host->pdata = dw_mci_parse_dt(host); 3018d6786fefSGuodong Xu if (PTR_ERR(host->pdata) == -EPROBE_DEFER) { 3019d6786fefSGuodong Xu return -EPROBE_DEFER; 3020d6786fefSGuodong Xu } else if (IS_ERR(host->pdata)) { 3021c91eab4bSThomas Abraham dev_err(host->dev, "platform data not available\n"); 3022c91eab4bSThomas Abraham return -EINVAL; 3023c91eab4bSThomas Abraham } 3024f95f3850SWill Newton } 3025f95f3850SWill Newton 3026780f22afSSeungwon Jeon host->biu_clk = devm_clk_get(host->dev, "biu"); 3027f90a0612SThomas Abraham if (IS_ERR(host->biu_clk)) { 3028f90a0612SThomas Abraham dev_dbg(host->dev, "biu clock not available\n"); 3029f90a0612SThomas Abraham } else { 3030f90a0612SThomas Abraham ret = clk_prepare_enable(host->biu_clk); 3031f90a0612SThomas Abraham if (ret) { 3032f90a0612SThomas Abraham dev_err(host->dev, "failed to enable biu clock\n"); 3033f90a0612SThomas Abraham return ret; 3034f90a0612SThomas Abraham } 3035f95f3850SWill Newton } 3036f95f3850SWill Newton 3037780f22afSSeungwon Jeon host->ciu_clk = devm_clk_get(host->dev, "ciu"); 3038f90a0612SThomas Abraham if (IS_ERR(host->ciu_clk)) { 3039f90a0612SThomas Abraham dev_dbg(host->dev, "ciu clock not available\n"); 30403c6d89eaSDoug Anderson host->bus_hz = host->pdata->bus_hz; 3041f90a0612SThomas Abraham } else { 3042f90a0612SThomas Abraham ret = clk_prepare_enable(host->ciu_clk); 3043f90a0612SThomas Abraham if (ret) { 3044f90a0612SThomas Abraham dev_err(host->dev, "failed to enable ciu clock\n"); 3045f90a0612SThomas Abraham goto err_clk_biu; 3046f90a0612SThomas Abraham } 3047f90a0612SThomas Abraham 30483c6d89eaSDoug Anderson if (host->pdata->bus_hz) { 30493c6d89eaSDoug Anderson ret = clk_set_rate(host->ciu_clk, host->pdata->bus_hz); 30503c6d89eaSDoug Anderson if (ret) 30513c6d89eaSDoug Anderson dev_warn(host->dev, 3052612de4c1SJaehoon Chung "Unable to set bus rate to %uHz\n", 30533c6d89eaSDoug Anderson host->pdata->bus_hz); 30543c6d89eaSDoug Anderson } 3055f90a0612SThomas Abraham host->bus_hz = clk_get_rate(host->ciu_clk); 30563c6d89eaSDoug Anderson } 3057f90a0612SThomas Abraham 3058612de4c1SJaehoon Chung if (!host->bus_hz) { 3059612de4c1SJaehoon Chung dev_err(host->dev, 3060612de4c1SJaehoon Chung "Platform data must supply bus speed\n"); 3061612de4c1SJaehoon Chung ret = -ENODEV; 3062612de4c1SJaehoon Chung goto err_clk_ciu; 3063612de4c1SJaehoon Chung } 3064612de4c1SJaehoon Chung 3065002f0d5cSYuvaraj Kumar C D if (drv_data && drv_data->init) { 3066002f0d5cSYuvaraj Kumar C D ret = drv_data->init(host); 3067002f0d5cSYuvaraj Kumar C D if (ret) { 3068002f0d5cSYuvaraj Kumar C D dev_err(host->dev, 3069002f0d5cSYuvaraj Kumar C D "implementation specific init failed\n"); 3070002f0d5cSYuvaraj Kumar C D goto err_clk_ciu; 3071002f0d5cSYuvaraj Kumar C D } 3072002f0d5cSYuvaraj Kumar C D } 3073002f0d5cSYuvaraj Kumar C D 3074d6786fefSGuodong Xu if (!IS_ERR(host->pdata->rstc)) { 3075d6786fefSGuodong Xu reset_control_assert(host->pdata->rstc); 3076d6786fefSGuodong Xu usleep_range(10, 50); 3077d6786fefSGuodong Xu reset_control_deassert(host->pdata->rstc); 3078d6786fefSGuodong Xu } 3079d6786fefSGuodong Xu 30805c935165SDoug Anderson setup_timer(&host->cmd11_timer, 30815c935165SDoug Anderson dw_mci_cmd11_timer, (unsigned long)host); 30825c935165SDoug Anderson 308357e10486SAddy Ke setup_timer(&host->dto_timer, 308457e10486SAddy Ke dw_mci_dto_timer, (unsigned long)host); 308557e10486SAddy Ke 3086f95f3850SWill Newton spin_lock_init(&host->lock); 3087f8c58c11SDoug Anderson spin_lock_init(&host->irq_lock); 3088f95f3850SWill Newton INIT_LIST_HEAD(&host->queue); 3089f95f3850SWill Newton 3090f95f3850SWill Newton /* 3091f95f3850SWill Newton * Get the host data width - this assumes that HCON has been set with 3092f95f3850SWill Newton * the correct values. 3093f95f3850SWill Newton */ 309470692752SShawn Lin i = SDMMC_GET_HDATA_WIDTH(mci_readl(host, HCON)); 3095f95f3850SWill Newton if (!i) { 3096f95f3850SWill Newton host->push_data = dw_mci_push_data16; 3097f95f3850SWill Newton host->pull_data = dw_mci_pull_data16; 3098f95f3850SWill Newton width = 16; 3099f95f3850SWill Newton host->data_shift = 1; 3100f95f3850SWill Newton } else if (i == 2) { 3101f95f3850SWill Newton host->push_data = dw_mci_push_data64; 3102f95f3850SWill Newton host->pull_data = dw_mci_pull_data64; 3103f95f3850SWill Newton width = 64; 3104f95f3850SWill Newton host->data_shift = 3; 3105f95f3850SWill Newton } else { 3106f95f3850SWill Newton /* Check for a reserved value, and warn if it is */ 3107f95f3850SWill Newton WARN((i != 1), 3108f95f3850SWill Newton "HCON reports a reserved host data width!\n" 3109f95f3850SWill Newton "Defaulting to 32-bit access.\n"); 3110f95f3850SWill Newton host->push_data = dw_mci_push_data32; 3111f95f3850SWill Newton host->pull_data = dw_mci_pull_data32; 3112f95f3850SWill Newton width = 32; 3113f95f3850SWill Newton host->data_shift = 2; 3114f95f3850SWill Newton } 3115f95f3850SWill Newton 3116f95f3850SWill Newton /* Reset all blocks */ 31173744415cSShawn Lin if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { 31183744415cSShawn Lin ret = -ENODEV; 31193744415cSShawn Lin goto err_clk_ciu; 31203744415cSShawn Lin } 3121141a712aSSeungwon Jeon 3122141a712aSSeungwon Jeon host->dma_ops = host->pdata->dma_ops; 3123141a712aSSeungwon Jeon dw_mci_init_dma(host); 3124f95f3850SWill Newton 3125f95f3850SWill Newton /* Clear the interrupts for the host controller */ 3126f95f3850SWill Newton mci_writel(host, RINTSTS, 0xFFFFFFFF); 3127f95f3850SWill Newton mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ 3128f95f3850SWill Newton 3129f95f3850SWill Newton /* Put in max timeout */ 3130f95f3850SWill Newton mci_writel(host, TMOUT, 0xFFFFFFFF); 3131f95f3850SWill Newton 3132f95f3850SWill Newton /* 3133f95f3850SWill Newton * FIFO threshold settings RxMark = fifo_size / 2 - 1, 3134f95f3850SWill Newton * Tx Mark = fifo_size / 2 DMA Size = 8 3135f95f3850SWill Newton */ 3136b86d8253SJames Hogan if (!host->pdata->fifo_depth) { 3137b86d8253SJames Hogan /* 3138b86d8253SJames Hogan * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may 3139b86d8253SJames Hogan * have been overwritten by the bootloader, just like we're 3140b86d8253SJames Hogan * about to do, so if you know the value for your hardware, you 3141b86d8253SJames Hogan * should put it in the platform data. 3142b86d8253SJames Hogan */ 3143f95f3850SWill Newton fifo_size = mci_readl(host, FIFOTH); 31448234e869SJaehoon Chung fifo_size = 1 + ((fifo_size >> 16) & 0xfff); 3145b86d8253SJames Hogan } else { 3146b86d8253SJames Hogan fifo_size = host->pdata->fifo_depth; 3147b86d8253SJames Hogan } 3148b86d8253SJames Hogan host->fifo_depth = fifo_size; 314952426899SSeungwon Jeon host->fifoth_val = 315052426899SSeungwon Jeon SDMMC_SET_FIFOTH(0x2, fifo_size / 2 - 1, fifo_size / 2); 3151e61cf118SJaehoon Chung mci_writel(host, FIFOTH, host->fifoth_val); 3152f95f3850SWill Newton 3153f95f3850SWill Newton /* disable clock to CIU */ 3154f95f3850SWill Newton mci_writel(host, CLKENA, 0); 3155f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 3156f95f3850SWill Newton 315763008768SJames Hogan /* 315863008768SJames Hogan * In 2.40a spec, Data offset is changed. 315963008768SJames Hogan * Need to check the version-id and set data-offset for DATA register. 316063008768SJames Hogan */ 316163008768SJames Hogan host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); 316263008768SJames Hogan dev_info(host->dev, "Version ID is %04x\n", host->verid); 316363008768SJames Hogan 316463008768SJames Hogan if (host->verid < DW_MMC_240A) 316576184ac1SBen Dooks host->fifo_reg = host->regs + DATA_OFFSET; 316663008768SJames Hogan else 316776184ac1SBen Dooks host->fifo_reg = host->regs + DATA_240A_OFFSET; 316863008768SJames Hogan 3169f95f3850SWill Newton tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); 3170780f22afSSeungwon Jeon ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, 3171780f22afSSeungwon Jeon host->irq_flags, "dw-mci", host); 3172f95f3850SWill Newton if (ret) 31736130e7a9SDoug Anderson goto err_dmaunmap; 3174f95f3850SWill Newton 3175f95f3850SWill Newton if (host->pdata->num_slots) 3176f95f3850SWill Newton host->num_slots = host->pdata->num_slots; 3177f95f3850SWill Newton else 31788a629d26SShawn Lin host->num_slots = 1; 31798a629d26SShawn Lin 31808a629d26SShawn Lin if (host->num_slots < 1 || 31818a629d26SShawn Lin host->num_slots > SDMMC_GET_SLOT_NUM(mci_readl(host, HCON))) { 31828a629d26SShawn Lin dev_err(host->dev, 31838a629d26SShawn Lin "Platform data must supply correct num_slots.\n"); 31848a629d26SShawn Lin ret = -ENODEV; 31858a629d26SShawn Lin goto err_clk_ciu; 31868a629d26SShawn Lin } 3187f95f3850SWill Newton 31882da1d7f2SYuvaraj CD /* 3189fa0c3283SDoug Anderson * Enable interrupts for command done, data over, data empty, 31902da1d7f2SYuvaraj CD * receive ready and error such as transmit, receive timeout, crc error 31912da1d7f2SYuvaraj CD */ 31922da1d7f2SYuvaraj CD mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | 31932da1d7f2SYuvaraj CD SDMMC_INT_TXDR | SDMMC_INT_RXDR | 3194fa0c3283SDoug Anderson DW_MCI_ERROR_FLAGS); 31950e3a22c0SShawn Lin /* Enable mci interrupt */ 31960e3a22c0SShawn Lin mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); 31972da1d7f2SYuvaraj CD 31980e3a22c0SShawn Lin dev_info(host->dev, 31990e3a22c0SShawn Lin "DW MMC controller at irq %d,%d bit host data width,%u deep fifo\n", 32002da1d7f2SYuvaraj CD host->irq, width, fifo_size); 32012da1d7f2SYuvaraj CD 3202f95f3850SWill Newton /* We need at least one slot to succeed */ 3203f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 3204f95f3850SWill Newton ret = dw_mci_init_slot(host, i); 32051c2215b7SThomas Abraham if (ret) 32061c2215b7SThomas Abraham dev_dbg(host->dev, "slot %d init failed\n", i); 32071c2215b7SThomas Abraham else 32081c2215b7SThomas Abraham init_slots++; 3209f95f3850SWill Newton } 32101c2215b7SThomas Abraham 32111c2215b7SThomas Abraham if (init_slots) { 32121c2215b7SThomas Abraham dev_info(host->dev, "%d slots initialized\n", init_slots); 32131c2215b7SThomas Abraham } else { 32140e3a22c0SShawn Lin dev_dbg(host->dev, 32150e3a22c0SShawn Lin "attempted to initialize %d slots, but failed on all\n", 32160e3a22c0SShawn Lin host->num_slots); 32176130e7a9SDoug Anderson goto err_dmaunmap; 3218f95f3850SWill Newton } 3219f95f3850SWill Newton 3220b793f658SDoug Anderson /* Now that slots are all setup, we can enable card detect */ 3221b793f658SDoug Anderson dw_mci_enable_cd(host); 3222b793f658SDoug Anderson 3223f95f3850SWill Newton return 0; 3224f95f3850SWill Newton 3225f95f3850SWill Newton err_dmaunmap: 3226f95f3850SWill Newton if (host->use_dma && host->dma_ops->exit) 3227f95f3850SWill Newton host->dma_ops->exit(host); 3228f90a0612SThomas Abraham 3229d6786fefSGuodong Xu if (!IS_ERR(host->pdata->rstc)) 3230d6786fefSGuodong Xu reset_control_assert(host->pdata->rstc); 3231d6786fefSGuodong Xu 3232f90a0612SThomas Abraham err_clk_ciu: 3233f90a0612SThomas Abraham clk_disable_unprepare(host->ciu_clk); 3234780f22afSSeungwon Jeon 3235f90a0612SThomas Abraham err_clk_biu: 3236f90a0612SThomas Abraham clk_disable_unprepare(host->biu_clk); 3237780f22afSSeungwon Jeon 3238f95f3850SWill Newton return ret; 3239f95f3850SWill Newton } 324062ca8034SShashidhar Hiremath EXPORT_SYMBOL(dw_mci_probe); 3241f95f3850SWill Newton 324262ca8034SShashidhar Hiremath void dw_mci_remove(struct dw_mci *host) 3243f95f3850SWill Newton { 3244f95f3850SWill Newton int i; 3245f95f3850SWill Newton 3246f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 32474a90920cSThomas Abraham dev_dbg(host->dev, "remove slot %d\n", i); 3248f95f3850SWill Newton if (host->slot[i]) 3249f95f3850SWill Newton dw_mci_cleanup_slot(host->slot[i], i); 3250f95f3850SWill Newton } 3251f95f3850SWill Newton 3252048fd7e6SPrabu Thangamuthu mci_writel(host, RINTSTS, 0xFFFFFFFF); 3253048fd7e6SPrabu Thangamuthu mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ 3254048fd7e6SPrabu Thangamuthu 3255f95f3850SWill Newton /* disable clock to CIU */ 3256f95f3850SWill Newton mci_writel(host, CLKENA, 0); 3257f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 3258f95f3850SWill Newton 3259f95f3850SWill Newton if (host->use_dma && host->dma_ops->exit) 3260f95f3850SWill Newton host->dma_ops->exit(host); 3261f95f3850SWill Newton 3262d6786fefSGuodong Xu if (!IS_ERR(host->pdata->rstc)) 3263d6786fefSGuodong Xu reset_control_assert(host->pdata->rstc); 3264d6786fefSGuodong Xu 3265f90a0612SThomas Abraham clk_disable_unprepare(host->ciu_clk); 3266f90a0612SThomas Abraham clk_disable_unprepare(host->biu_clk); 3267f95f3850SWill Newton } 326862ca8034SShashidhar Hiremath EXPORT_SYMBOL(dw_mci_remove); 326962ca8034SShashidhar Hiremath 327062ca8034SShashidhar Hiremath 3271f95f3850SWill Newton 32726fe8890dSJaehoon Chung #ifdef CONFIG_PM_SLEEP 3273f95f3850SWill Newton /* 3274f95f3850SWill Newton * TODO: we should probably disable the clock to the card in the suspend path. 3275f95f3850SWill Newton */ 327662ca8034SShashidhar Hiremath int dw_mci_suspend(struct dw_mci *host) 3277f95f3850SWill Newton { 32783fc7eaefSShawn Lin if (host->use_dma && host->dma_ops->exit) 32793fc7eaefSShawn Lin host->dma_ops->exit(host); 32803fc7eaefSShawn Lin 3281f95f3850SWill Newton return 0; 3282f95f3850SWill Newton } 328362ca8034SShashidhar Hiremath EXPORT_SYMBOL(dw_mci_suspend); 3284f95f3850SWill Newton 328562ca8034SShashidhar Hiremath int dw_mci_resume(struct dw_mci *host) 3286f95f3850SWill Newton { 3287f95f3850SWill Newton int i, ret; 3288f95f3850SWill Newton 32893a33a94cSSonny Rao if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { 3290e61cf118SJaehoon Chung ret = -ENODEV; 3291e61cf118SJaehoon Chung return ret; 3292e61cf118SJaehoon Chung } 3293e61cf118SJaehoon Chung 32943bfe619dSJonathan Kliegman if (host->use_dma && host->dma_ops->init) 3295141a712aSSeungwon Jeon host->dma_ops->init(host); 3296141a712aSSeungwon Jeon 329752426899SSeungwon Jeon /* 329852426899SSeungwon Jeon * Restore the initial value at FIFOTH register 329952426899SSeungwon Jeon * And Invalidate the prev_blksz with zero 330052426899SSeungwon Jeon */ 3301e61cf118SJaehoon Chung mci_writel(host, FIFOTH, host->fifoth_val); 330252426899SSeungwon Jeon host->prev_blksz = 0; 3303e61cf118SJaehoon Chung 33042eb2944fSDoug Anderson /* Put in max timeout */ 33052eb2944fSDoug Anderson mci_writel(host, TMOUT, 0xFFFFFFFF); 33062eb2944fSDoug Anderson 3307e61cf118SJaehoon Chung mci_writel(host, RINTSTS, 0xFFFFFFFF); 3308e61cf118SJaehoon Chung mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | 3309e61cf118SJaehoon Chung SDMMC_INT_TXDR | SDMMC_INT_RXDR | 3310fa0c3283SDoug Anderson DW_MCI_ERROR_FLAGS); 3311e61cf118SJaehoon Chung mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); 3312e61cf118SJaehoon Chung 3313f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 3314f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 33150e3a22c0SShawn Lin 3316f95f3850SWill Newton if (!slot) 3317f95f3850SWill Newton continue; 3318ab269128SAbhilash Kesavan if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER) { 3319ab269128SAbhilash Kesavan dw_mci_set_ios(slot->mmc, &slot->mmc->ios); 3320ab269128SAbhilash Kesavan dw_mci_setup_bus(slot, true); 3321ab269128SAbhilash Kesavan } 3322f95f3850SWill Newton } 3323fa0c3283SDoug Anderson 3324fa0c3283SDoug Anderson /* Now that slots are all setup, we can enable card detect */ 3325fa0c3283SDoug Anderson dw_mci_enable_cd(host); 3326fa0c3283SDoug Anderson 3327f95f3850SWill Newton return 0; 3328f95f3850SWill Newton } 332962ca8034SShashidhar Hiremath EXPORT_SYMBOL(dw_mci_resume); 33306fe8890dSJaehoon Chung #endif /* CONFIG_PM_SLEEP */ 33316fe8890dSJaehoon Chung 3332f95f3850SWill Newton static int __init dw_mci_init(void) 3333f95f3850SWill Newton { 33348e1c4e4dSSachin Kamat pr_info("Synopsys Designware Multimedia Card Interface Driver\n"); 333562ca8034SShashidhar Hiremath return 0; 3336f95f3850SWill Newton } 3337f95f3850SWill Newton 3338f95f3850SWill Newton static void __exit dw_mci_exit(void) 3339f95f3850SWill Newton { 3340f95f3850SWill Newton } 3341f95f3850SWill Newton 3342f95f3850SWill Newton module_init(dw_mci_init); 3343f95f3850SWill Newton module_exit(dw_mci_exit); 3344f95f3850SWill Newton 3345f95f3850SWill Newton MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 3346f95f3850SWill Newton MODULE_AUTHOR("NXP Semiconductor VietNam"); 3347f95f3850SWill Newton MODULE_AUTHOR("Imagination Technologies Ltd"); 3348f95f3850SWill Newton MODULE_LICENSE("GPL v2"); 3349