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> 30f95f3850SWill Newton #include <linux/mmc/host.h> 31f95f3850SWill Newton #include <linux/mmc/mmc.h> 32f95f3850SWill Newton #include <linux/mmc/dw_mmc.h> 33f95f3850SWill Newton #include <linux/bitops.h> 34c07946a3SJaehoon Chung #include <linux/regulator/consumer.h> 351791b13eSJames Hogan #include <linux/workqueue.h> 36c91eab4bSThomas Abraham #include <linux/of.h> 3755a6ceb2SDoug Anderson #include <linux/of_gpio.h> 38f95f3850SWill Newton 39f95f3850SWill Newton #include "dw_mmc.h" 40f95f3850SWill Newton 41f95f3850SWill Newton /* Common flag combinations */ 423f7eec62SJaehoon Chung #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DRTO | SDMMC_INT_DCRC | \ 43f95f3850SWill Newton SDMMC_INT_HTO | SDMMC_INT_SBE | \ 44f95f3850SWill Newton SDMMC_INT_EBE) 45f95f3850SWill Newton #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \ 46f95f3850SWill Newton SDMMC_INT_RESP_ERR) 47f95f3850SWill Newton #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \ 48f95f3850SWill Newton DW_MCI_CMD_ERROR_FLAGS | SDMMC_INT_HLE) 49f95f3850SWill Newton #define DW_MCI_SEND_STATUS 1 50f95f3850SWill Newton #define DW_MCI_RECV_STATUS 2 51f95f3850SWill Newton #define DW_MCI_DMA_THRESHOLD 16 52f95f3850SWill Newton 53f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 54fc79a4d6SJoonyoung Shim #define IDMAC_INT_CLR (SDMMC_IDMAC_INT_AI | SDMMC_IDMAC_INT_NI | \ 55fc79a4d6SJoonyoung Shim SDMMC_IDMAC_INT_CES | SDMMC_IDMAC_INT_DU | \ 56fc79a4d6SJoonyoung Shim SDMMC_IDMAC_INT_FBE | SDMMC_IDMAC_INT_RI | \ 57fc79a4d6SJoonyoung Shim SDMMC_IDMAC_INT_TI) 58fc79a4d6SJoonyoung Shim 59f95f3850SWill Newton struct idmac_desc { 60f95f3850SWill Newton u32 des0; /* Control Descriptor */ 61f95f3850SWill Newton #define IDMAC_DES0_DIC BIT(1) 62f95f3850SWill Newton #define IDMAC_DES0_LD BIT(2) 63f95f3850SWill Newton #define IDMAC_DES0_FD BIT(3) 64f95f3850SWill Newton #define IDMAC_DES0_CH BIT(4) 65f95f3850SWill Newton #define IDMAC_DES0_ER BIT(5) 66f95f3850SWill Newton #define IDMAC_DES0_CES BIT(30) 67f95f3850SWill Newton #define IDMAC_DES0_OWN BIT(31) 68f95f3850SWill Newton 69f95f3850SWill Newton u32 des1; /* Buffer sizes */ 70f95f3850SWill Newton #define IDMAC_SET_BUFFER1_SIZE(d, s) \ 719b7bbe10SShashidhar Hiremath ((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff)) 72f95f3850SWill Newton 73f95f3850SWill Newton u32 des2; /* buffer 1 physical address */ 74f95f3850SWill Newton 75f95f3850SWill Newton u32 des3; /* buffer 2 physical address */ 76f95f3850SWill Newton }; 77f95f3850SWill Newton #endif /* CONFIG_MMC_DW_IDMAC */ 78f95f3850SWill Newton 79f95f3850SWill Newton /** 80f95f3850SWill Newton * struct dw_mci_slot - MMC slot state 81f95f3850SWill Newton * @mmc: The mmc_host representing this slot. 82f95f3850SWill Newton * @host: The MMC controller this slot is using. 83a70aaa64SDoug Anderson * @quirks: Slot-level quirks (DW_MCI_SLOT_QUIRK_XXX) 8455a6ceb2SDoug Anderson * @wp_gpio: If gpio_is_valid() we'll use this to read write protect. 85f95f3850SWill Newton * @ctype: Card type for this slot. 86f95f3850SWill Newton * @mrq: mmc_request currently being processed or waiting to be 87f95f3850SWill Newton * processed, or NULL when the slot is idle. 88f95f3850SWill Newton * @queue_node: List node for placing this node in the @queue list of 89f95f3850SWill Newton * &struct dw_mci. 90f95f3850SWill Newton * @clock: Clock rate configured by set_ios(). Protected by host->lock. 91f95f3850SWill Newton * @flags: Random state bits associated with the slot. 92f95f3850SWill Newton * @id: Number of this slot. 93f95f3850SWill Newton * @last_detect_state: Most recently observed card detect state. 94f95f3850SWill Newton */ 95f95f3850SWill Newton struct dw_mci_slot { 96f95f3850SWill Newton struct mmc_host *mmc; 97f95f3850SWill Newton struct dw_mci *host; 98f95f3850SWill Newton 99a70aaa64SDoug Anderson int quirks; 10055a6ceb2SDoug Anderson int wp_gpio; 101a70aaa64SDoug Anderson 102f95f3850SWill Newton u32 ctype; 103f95f3850SWill Newton 104f95f3850SWill Newton struct mmc_request *mrq; 105f95f3850SWill Newton struct list_head queue_node; 106f95f3850SWill Newton 107f95f3850SWill Newton unsigned int clock; 108f95f3850SWill Newton unsigned long flags; 109f95f3850SWill Newton #define DW_MMC_CARD_PRESENT 0 110f95f3850SWill Newton #define DW_MMC_CARD_NEED_INIT 1 111f95f3850SWill Newton int id; 112f95f3850SWill Newton int last_detect_state; 113f95f3850SWill Newton }; 114f95f3850SWill Newton 115f95f3850SWill Newton #if defined(CONFIG_DEBUG_FS) 116f95f3850SWill Newton static int dw_mci_req_show(struct seq_file *s, void *v) 117f95f3850SWill Newton { 118f95f3850SWill Newton struct dw_mci_slot *slot = s->private; 119f95f3850SWill Newton struct mmc_request *mrq; 120f95f3850SWill Newton struct mmc_command *cmd; 121f95f3850SWill Newton struct mmc_command *stop; 122f95f3850SWill Newton struct mmc_data *data; 123f95f3850SWill Newton 124f95f3850SWill Newton /* Make sure we get a consistent snapshot */ 125f95f3850SWill Newton spin_lock_bh(&slot->host->lock); 126f95f3850SWill Newton mrq = slot->mrq; 127f95f3850SWill Newton 128f95f3850SWill Newton if (mrq) { 129f95f3850SWill Newton cmd = mrq->cmd; 130f95f3850SWill Newton data = mrq->data; 131f95f3850SWill Newton stop = mrq->stop; 132f95f3850SWill Newton 133f95f3850SWill Newton if (cmd) 134f95f3850SWill Newton seq_printf(s, 135f95f3850SWill Newton "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 136f95f3850SWill Newton cmd->opcode, cmd->arg, cmd->flags, 137f95f3850SWill Newton cmd->resp[0], cmd->resp[1], cmd->resp[2], 138f95f3850SWill Newton cmd->resp[2], cmd->error); 139f95f3850SWill Newton if (data) 140f95f3850SWill Newton seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", 141f95f3850SWill Newton data->bytes_xfered, data->blocks, 142f95f3850SWill Newton data->blksz, data->flags, data->error); 143f95f3850SWill Newton if (stop) 144f95f3850SWill Newton seq_printf(s, 145f95f3850SWill Newton "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 146f95f3850SWill Newton stop->opcode, stop->arg, stop->flags, 147f95f3850SWill Newton stop->resp[0], stop->resp[1], stop->resp[2], 148f95f3850SWill Newton stop->resp[2], stop->error); 149f95f3850SWill Newton } 150f95f3850SWill Newton 151f95f3850SWill Newton spin_unlock_bh(&slot->host->lock); 152f95f3850SWill Newton 153f95f3850SWill Newton return 0; 154f95f3850SWill Newton } 155f95f3850SWill Newton 156f95f3850SWill Newton static int dw_mci_req_open(struct inode *inode, struct file *file) 157f95f3850SWill Newton { 158f95f3850SWill Newton return single_open(file, dw_mci_req_show, inode->i_private); 159f95f3850SWill Newton } 160f95f3850SWill Newton 161f95f3850SWill Newton static const struct file_operations dw_mci_req_fops = { 162f95f3850SWill Newton .owner = THIS_MODULE, 163f95f3850SWill Newton .open = dw_mci_req_open, 164f95f3850SWill Newton .read = seq_read, 165f95f3850SWill Newton .llseek = seq_lseek, 166f95f3850SWill Newton .release = single_release, 167f95f3850SWill Newton }; 168f95f3850SWill Newton 169f95f3850SWill Newton static int dw_mci_regs_show(struct seq_file *s, void *v) 170f95f3850SWill Newton { 171f95f3850SWill Newton seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); 172f95f3850SWill Newton seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); 173f95f3850SWill Newton seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); 174f95f3850SWill Newton seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); 175f95f3850SWill Newton seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); 176f95f3850SWill Newton seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); 177f95f3850SWill Newton 178f95f3850SWill Newton return 0; 179f95f3850SWill Newton } 180f95f3850SWill Newton 181f95f3850SWill Newton static int dw_mci_regs_open(struct inode *inode, struct file *file) 182f95f3850SWill Newton { 183f95f3850SWill Newton return single_open(file, dw_mci_regs_show, inode->i_private); 184f95f3850SWill Newton } 185f95f3850SWill Newton 186f95f3850SWill Newton static const struct file_operations dw_mci_regs_fops = { 187f95f3850SWill Newton .owner = THIS_MODULE, 188f95f3850SWill Newton .open = dw_mci_regs_open, 189f95f3850SWill Newton .read = seq_read, 190f95f3850SWill Newton .llseek = seq_lseek, 191f95f3850SWill Newton .release = single_release, 192f95f3850SWill Newton }; 193f95f3850SWill Newton 194f95f3850SWill Newton static void dw_mci_init_debugfs(struct dw_mci_slot *slot) 195f95f3850SWill Newton { 196f95f3850SWill Newton struct mmc_host *mmc = slot->mmc; 197f95f3850SWill Newton struct dw_mci *host = slot->host; 198f95f3850SWill Newton struct dentry *root; 199f95f3850SWill Newton struct dentry *node; 200f95f3850SWill Newton 201f95f3850SWill Newton root = mmc->debugfs_root; 202f95f3850SWill Newton if (!root) 203f95f3850SWill Newton return; 204f95f3850SWill Newton 205f95f3850SWill Newton node = debugfs_create_file("regs", S_IRUSR, root, host, 206f95f3850SWill Newton &dw_mci_regs_fops); 207f95f3850SWill Newton if (!node) 208f95f3850SWill Newton goto err; 209f95f3850SWill Newton 210f95f3850SWill Newton node = debugfs_create_file("req", S_IRUSR, root, slot, 211f95f3850SWill Newton &dw_mci_req_fops); 212f95f3850SWill Newton if (!node) 213f95f3850SWill Newton goto err; 214f95f3850SWill Newton 215f95f3850SWill Newton node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); 216f95f3850SWill Newton if (!node) 217f95f3850SWill Newton goto err; 218f95f3850SWill Newton 219f95f3850SWill Newton node = debugfs_create_x32("pending_events", S_IRUSR, root, 220f95f3850SWill Newton (u32 *)&host->pending_events); 221f95f3850SWill Newton if (!node) 222f95f3850SWill Newton goto err; 223f95f3850SWill Newton 224f95f3850SWill Newton node = debugfs_create_x32("completed_events", S_IRUSR, root, 225f95f3850SWill Newton (u32 *)&host->completed_events); 226f95f3850SWill Newton if (!node) 227f95f3850SWill Newton goto err; 228f95f3850SWill Newton 229f95f3850SWill Newton return; 230f95f3850SWill Newton 231f95f3850SWill Newton err: 232f95f3850SWill Newton dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); 233f95f3850SWill Newton } 234f95f3850SWill Newton #endif /* defined(CONFIG_DEBUG_FS) */ 235f95f3850SWill Newton 236f95f3850SWill Newton static void dw_mci_set_timeout(struct dw_mci *host) 237f95f3850SWill Newton { 238f95f3850SWill Newton /* timeout (maximum) */ 239f95f3850SWill Newton mci_writel(host, TMOUT, 0xffffffff); 240f95f3850SWill Newton } 241f95f3850SWill Newton 242f95f3850SWill Newton static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) 243f95f3850SWill Newton { 244f95f3850SWill Newton struct mmc_data *data; 245800d78bfSThomas Abraham struct dw_mci_slot *slot = mmc_priv(mmc); 246e95baf13SArnd Bergmann const struct dw_mci_drv_data *drv_data = slot->host->drv_data; 247f95f3850SWill Newton u32 cmdr; 248f95f3850SWill Newton cmd->error = -EINPROGRESS; 249f95f3850SWill Newton 250f95f3850SWill Newton cmdr = cmd->opcode; 251f95f3850SWill Newton 252f95f3850SWill Newton if (cmdr == MMC_STOP_TRANSMISSION) 253f95f3850SWill Newton cmdr |= SDMMC_CMD_STOP; 254f95f3850SWill Newton else 255f95f3850SWill Newton cmdr |= SDMMC_CMD_PRV_DAT_WAIT; 256f95f3850SWill Newton 257f95f3850SWill Newton if (cmd->flags & MMC_RSP_PRESENT) { 258f95f3850SWill Newton /* We expect a response, so set this bit */ 259f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_EXP; 260f95f3850SWill Newton if (cmd->flags & MMC_RSP_136) 261f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_LONG; 262f95f3850SWill Newton } 263f95f3850SWill Newton 264f95f3850SWill Newton if (cmd->flags & MMC_RSP_CRC) 265f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_CRC; 266f95f3850SWill Newton 267f95f3850SWill Newton data = cmd->data; 268f95f3850SWill Newton if (data) { 269f95f3850SWill Newton cmdr |= SDMMC_CMD_DAT_EXP; 270f95f3850SWill Newton if (data->flags & MMC_DATA_STREAM) 271f95f3850SWill Newton cmdr |= SDMMC_CMD_STRM_MODE; 272f95f3850SWill Newton if (data->flags & MMC_DATA_WRITE) 273f95f3850SWill Newton cmdr |= SDMMC_CMD_DAT_WR; 274f95f3850SWill Newton } 275f95f3850SWill Newton 276cb27a843SJames Hogan if (drv_data && drv_data->prepare_command) 277cb27a843SJames Hogan drv_data->prepare_command(slot->host, &cmdr); 278800d78bfSThomas Abraham 279f95f3850SWill Newton return cmdr; 280f95f3850SWill Newton } 281f95f3850SWill Newton 282f95f3850SWill Newton static void dw_mci_start_command(struct dw_mci *host, 283f95f3850SWill Newton struct mmc_command *cmd, u32 cmd_flags) 284f95f3850SWill Newton { 285f95f3850SWill Newton host->cmd = cmd; 2864a90920cSThomas Abraham dev_vdbg(host->dev, 287f95f3850SWill Newton "start command: ARGR=0x%08x CMDR=0x%08x\n", 288f95f3850SWill Newton cmd->arg, cmd_flags); 289f95f3850SWill Newton 290f95f3850SWill Newton mci_writel(host, CMDARG, cmd->arg); 291f95f3850SWill Newton wmb(); 292f95f3850SWill Newton 293f95f3850SWill Newton mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); 294f95f3850SWill Newton } 295f95f3850SWill Newton 296f95f3850SWill Newton static void send_stop_cmd(struct dw_mci *host, struct mmc_data *data) 297f95f3850SWill Newton { 298f95f3850SWill Newton dw_mci_start_command(host, data->stop, host->stop_cmdr); 299f95f3850SWill Newton } 300f95f3850SWill Newton 301f95f3850SWill Newton /* DMA interface functions */ 302f95f3850SWill Newton static void dw_mci_stop_dma(struct dw_mci *host) 303f95f3850SWill Newton { 30403e8cb53SJames Hogan if (host->using_dma) { 305f95f3850SWill Newton host->dma_ops->stop(host); 306f95f3850SWill Newton host->dma_ops->cleanup(host); 307f95f3850SWill Newton } else { 308f95f3850SWill Newton /* Data transfer was stopped by the interrupt handler */ 309f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 310f95f3850SWill Newton } 311f95f3850SWill Newton } 312f95f3850SWill Newton 3139aa51408SSeungwon Jeon static int dw_mci_get_dma_dir(struct mmc_data *data) 3149aa51408SSeungwon Jeon { 3159aa51408SSeungwon Jeon if (data->flags & MMC_DATA_WRITE) 3169aa51408SSeungwon Jeon return DMA_TO_DEVICE; 3179aa51408SSeungwon Jeon else 3189aa51408SSeungwon Jeon return DMA_FROM_DEVICE; 3199aa51408SSeungwon Jeon } 3209aa51408SSeungwon Jeon 3219beee912SJaehoon Chung #ifdef CONFIG_MMC_DW_IDMAC 322f95f3850SWill Newton static void dw_mci_dma_cleanup(struct dw_mci *host) 323f95f3850SWill Newton { 324f95f3850SWill Newton struct mmc_data *data = host->data; 325f95f3850SWill Newton 326f95f3850SWill Newton if (data) 3279aa51408SSeungwon Jeon if (!data->host_cookie) 3284a90920cSThomas Abraham dma_unmap_sg(host->dev, 3299aa51408SSeungwon Jeon data->sg, 3309aa51408SSeungwon Jeon data->sg_len, 3319aa51408SSeungwon Jeon dw_mci_get_dma_dir(data)); 332f95f3850SWill Newton } 333f95f3850SWill Newton 334f95f3850SWill Newton static void dw_mci_idmac_stop_dma(struct dw_mci *host) 335f95f3850SWill Newton { 336f95f3850SWill Newton u32 temp; 337f95f3850SWill Newton 338f95f3850SWill Newton /* Disable and reset the IDMAC interface */ 339f95f3850SWill Newton temp = mci_readl(host, CTRL); 340f95f3850SWill Newton temp &= ~SDMMC_CTRL_USE_IDMAC; 341f95f3850SWill Newton temp |= SDMMC_CTRL_DMA_RESET; 342f95f3850SWill Newton mci_writel(host, CTRL, temp); 343f95f3850SWill Newton 344f95f3850SWill Newton /* Stop the IDMAC running */ 345f95f3850SWill Newton temp = mci_readl(host, BMOD); 346a5289a43SJaehoon Chung temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB); 347f95f3850SWill Newton mci_writel(host, BMOD, temp); 348f95f3850SWill Newton } 349f95f3850SWill Newton 350f95f3850SWill Newton static void dw_mci_idmac_complete_dma(struct dw_mci *host) 351f95f3850SWill Newton { 352f95f3850SWill Newton struct mmc_data *data = host->data; 353f95f3850SWill Newton 3544a90920cSThomas Abraham dev_vdbg(host->dev, "DMA complete\n"); 355f95f3850SWill Newton 356f95f3850SWill Newton host->dma_ops->cleanup(host); 357f95f3850SWill Newton 358f95f3850SWill Newton /* 359f95f3850SWill Newton * If the card was removed, data will be NULL. No point in trying to 360f95f3850SWill Newton * send the stop command or waiting for NBUSY in this case. 361f95f3850SWill Newton */ 362f95f3850SWill Newton if (data) { 363f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 364f95f3850SWill Newton tasklet_schedule(&host->tasklet); 365f95f3850SWill Newton } 366f95f3850SWill Newton } 367f95f3850SWill Newton 368f95f3850SWill Newton static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, 369f95f3850SWill Newton unsigned int sg_len) 370f95f3850SWill Newton { 371f95f3850SWill Newton int i; 372f95f3850SWill Newton struct idmac_desc *desc = host->sg_cpu; 373f95f3850SWill Newton 374f95f3850SWill Newton for (i = 0; i < sg_len; i++, desc++) { 375f95f3850SWill Newton unsigned int length = sg_dma_len(&data->sg[i]); 376f95f3850SWill Newton u32 mem_addr = sg_dma_address(&data->sg[i]); 377f95f3850SWill Newton 378f95f3850SWill Newton /* Set the OWN bit and disable interrupts for this descriptor */ 379f95f3850SWill Newton desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | IDMAC_DES0_CH; 380f95f3850SWill Newton 381f95f3850SWill Newton /* Buffer length */ 382f95f3850SWill Newton IDMAC_SET_BUFFER1_SIZE(desc, length); 383f95f3850SWill Newton 384f95f3850SWill Newton /* Physical address to DMA to/from */ 385f95f3850SWill Newton desc->des2 = mem_addr; 386f95f3850SWill Newton } 387f95f3850SWill Newton 388f95f3850SWill Newton /* Set first descriptor */ 389f95f3850SWill Newton desc = host->sg_cpu; 390f95f3850SWill Newton desc->des0 |= IDMAC_DES0_FD; 391f95f3850SWill Newton 392f95f3850SWill Newton /* Set last descriptor */ 393f95f3850SWill Newton desc = host->sg_cpu + (i - 1) * sizeof(struct idmac_desc); 394f95f3850SWill Newton desc->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); 395f95f3850SWill Newton desc->des0 |= IDMAC_DES0_LD; 396f95f3850SWill Newton 397f95f3850SWill Newton wmb(); 398f95f3850SWill Newton } 399f95f3850SWill Newton 400f95f3850SWill Newton static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) 401f95f3850SWill Newton { 402f95f3850SWill Newton u32 temp; 403f95f3850SWill Newton 404f95f3850SWill Newton dw_mci_translate_sglist(host, host->data, sg_len); 405f95f3850SWill Newton 406f95f3850SWill Newton /* Select IDMAC interface */ 407f95f3850SWill Newton temp = mci_readl(host, CTRL); 408f95f3850SWill Newton temp |= SDMMC_CTRL_USE_IDMAC; 409f95f3850SWill Newton mci_writel(host, CTRL, temp); 410f95f3850SWill Newton 411f95f3850SWill Newton wmb(); 412f95f3850SWill Newton 413f95f3850SWill Newton /* Enable the IDMAC */ 414f95f3850SWill Newton temp = mci_readl(host, BMOD); 415a5289a43SJaehoon Chung temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB; 416f95f3850SWill Newton mci_writel(host, BMOD, temp); 417f95f3850SWill Newton 418f95f3850SWill Newton /* Start it running */ 419f95f3850SWill Newton mci_writel(host, PLDMND, 1); 420f95f3850SWill Newton } 421f95f3850SWill Newton 422f95f3850SWill Newton static int dw_mci_idmac_init(struct dw_mci *host) 423f95f3850SWill Newton { 424f95f3850SWill Newton struct idmac_desc *p; 425897b69e7SSeungwon Jeon int i; 426f95f3850SWill Newton 427f95f3850SWill Newton /* Number of descriptors in the ring buffer */ 428f95f3850SWill Newton host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc); 429f95f3850SWill Newton 430f95f3850SWill Newton /* Forward link the descriptor list */ 431f95f3850SWill Newton for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++) 432f95f3850SWill Newton p->des3 = host->sg_dma + (sizeof(struct idmac_desc) * (i + 1)); 433f95f3850SWill Newton 434f95f3850SWill Newton /* Set the last descriptor as the end-of-ring descriptor */ 435f95f3850SWill Newton p->des3 = host->sg_dma; 436f95f3850SWill Newton p->des0 = IDMAC_DES0_ER; 437f95f3850SWill Newton 438141a712aSSeungwon Jeon mci_writel(host, BMOD, SDMMC_IDMAC_SWRESET); 439141a712aSSeungwon Jeon 440f95f3850SWill Newton /* Mask out interrupts - get Tx & Rx complete only */ 441fc79a4d6SJoonyoung Shim mci_writel(host, IDSTS, IDMAC_INT_CLR); 442f95f3850SWill Newton mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | SDMMC_IDMAC_INT_RI | 443f95f3850SWill Newton SDMMC_IDMAC_INT_TI); 444f95f3850SWill Newton 445f95f3850SWill Newton /* Set the descriptor base address */ 446f95f3850SWill Newton mci_writel(host, DBADDR, host->sg_dma); 447f95f3850SWill Newton return 0; 448f95f3850SWill Newton } 449f95f3850SWill Newton 4508e2b36eaSArnd Bergmann static const struct dw_mci_dma_ops dw_mci_idmac_ops = { 451885c3e80SSeungwon Jeon .init = dw_mci_idmac_init, 452885c3e80SSeungwon Jeon .start = dw_mci_idmac_start_dma, 453885c3e80SSeungwon Jeon .stop = dw_mci_idmac_stop_dma, 454885c3e80SSeungwon Jeon .complete = dw_mci_idmac_complete_dma, 455885c3e80SSeungwon Jeon .cleanup = dw_mci_dma_cleanup, 456885c3e80SSeungwon Jeon }; 457885c3e80SSeungwon Jeon #endif /* CONFIG_MMC_DW_IDMAC */ 458885c3e80SSeungwon Jeon 4599aa51408SSeungwon Jeon static int dw_mci_pre_dma_transfer(struct dw_mci *host, 4609aa51408SSeungwon Jeon struct mmc_data *data, 4619aa51408SSeungwon Jeon bool next) 462f95f3850SWill Newton { 463f95f3850SWill Newton struct scatterlist *sg; 4649aa51408SSeungwon Jeon unsigned int i, sg_len; 465f95f3850SWill Newton 4669aa51408SSeungwon Jeon if (!next && data->host_cookie) 4679aa51408SSeungwon Jeon return data->host_cookie; 468f95f3850SWill Newton 469f95f3850SWill Newton /* 470f95f3850SWill Newton * We don't do DMA on "complex" transfers, i.e. with 471f95f3850SWill Newton * non-word-aligned buffers or lengths. Also, we don't bother 472f95f3850SWill Newton * with all the DMA setup overhead for short transfers. 473f95f3850SWill Newton */ 474f95f3850SWill Newton if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) 475f95f3850SWill Newton return -EINVAL; 4769aa51408SSeungwon Jeon 477f95f3850SWill Newton if (data->blksz & 3) 478f95f3850SWill Newton return -EINVAL; 479f95f3850SWill Newton 480f95f3850SWill Newton for_each_sg(data->sg, sg, data->sg_len, i) { 481f95f3850SWill Newton if (sg->offset & 3 || sg->length & 3) 482f95f3850SWill Newton return -EINVAL; 483f95f3850SWill Newton } 484f95f3850SWill Newton 4854a90920cSThomas Abraham sg_len = dma_map_sg(host->dev, 4869aa51408SSeungwon Jeon data->sg, 4879aa51408SSeungwon Jeon data->sg_len, 4889aa51408SSeungwon Jeon dw_mci_get_dma_dir(data)); 4899aa51408SSeungwon Jeon if (sg_len == 0) 4909aa51408SSeungwon Jeon return -EINVAL; 4919aa51408SSeungwon Jeon 4929aa51408SSeungwon Jeon if (next) 4939aa51408SSeungwon Jeon data->host_cookie = sg_len; 4949aa51408SSeungwon Jeon 4959aa51408SSeungwon Jeon return sg_len; 4969aa51408SSeungwon Jeon } 4979aa51408SSeungwon Jeon 4989aa51408SSeungwon Jeon static void dw_mci_pre_req(struct mmc_host *mmc, 4999aa51408SSeungwon Jeon struct mmc_request *mrq, 5009aa51408SSeungwon Jeon bool is_first_req) 5019aa51408SSeungwon Jeon { 5029aa51408SSeungwon Jeon struct dw_mci_slot *slot = mmc_priv(mmc); 5039aa51408SSeungwon Jeon struct mmc_data *data = mrq->data; 5049aa51408SSeungwon Jeon 5059aa51408SSeungwon Jeon if (!slot->host->use_dma || !data) 5069aa51408SSeungwon Jeon return; 5079aa51408SSeungwon Jeon 5089aa51408SSeungwon Jeon if (data->host_cookie) { 5099aa51408SSeungwon Jeon data->host_cookie = 0; 5109aa51408SSeungwon Jeon return; 5119aa51408SSeungwon Jeon } 5129aa51408SSeungwon Jeon 5139aa51408SSeungwon Jeon if (dw_mci_pre_dma_transfer(slot->host, mrq->data, 1) < 0) 5149aa51408SSeungwon Jeon data->host_cookie = 0; 5159aa51408SSeungwon Jeon } 5169aa51408SSeungwon Jeon 5179aa51408SSeungwon Jeon static void dw_mci_post_req(struct mmc_host *mmc, 5189aa51408SSeungwon Jeon struct mmc_request *mrq, 5199aa51408SSeungwon Jeon int err) 5209aa51408SSeungwon Jeon { 5219aa51408SSeungwon Jeon struct dw_mci_slot *slot = mmc_priv(mmc); 5229aa51408SSeungwon Jeon struct mmc_data *data = mrq->data; 5239aa51408SSeungwon Jeon 5249aa51408SSeungwon Jeon if (!slot->host->use_dma || !data) 5259aa51408SSeungwon Jeon return; 5269aa51408SSeungwon Jeon 5279aa51408SSeungwon Jeon if (data->host_cookie) 5284a90920cSThomas Abraham dma_unmap_sg(slot->host->dev, 5299aa51408SSeungwon Jeon data->sg, 5309aa51408SSeungwon Jeon data->sg_len, 5319aa51408SSeungwon Jeon dw_mci_get_dma_dir(data)); 5329aa51408SSeungwon Jeon data->host_cookie = 0; 5339aa51408SSeungwon Jeon } 5349aa51408SSeungwon Jeon 5359aa51408SSeungwon Jeon static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) 5369aa51408SSeungwon Jeon { 5379aa51408SSeungwon Jeon int sg_len; 5389aa51408SSeungwon Jeon u32 temp; 5399aa51408SSeungwon Jeon 5409aa51408SSeungwon Jeon host->using_dma = 0; 5419aa51408SSeungwon Jeon 5429aa51408SSeungwon Jeon /* If we don't have a channel, we can't do DMA */ 5439aa51408SSeungwon Jeon if (!host->use_dma) 5449aa51408SSeungwon Jeon return -ENODEV; 5459aa51408SSeungwon Jeon 5469aa51408SSeungwon Jeon sg_len = dw_mci_pre_dma_transfer(host, data, 0); 547a99aa9b9SSeungwon Jeon if (sg_len < 0) { 548a99aa9b9SSeungwon Jeon host->dma_ops->stop(host); 5499aa51408SSeungwon Jeon return sg_len; 550a99aa9b9SSeungwon Jeon } 5519aa51408SSeungwon Jeon 55203e8cb53SJames Hogan host->using_dma = 1; 55303e8cb53SJames Hogan 5544a90920cSThomas Abraham dev_vdbg(host->dev, 555f95f3850SWill Newton "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", 556f95f3850SWill Newton (unsigned long)host->sg_cpu, (unsigned long)host->sg_dma, 557f95f3850SWill Newton sg_len); 558f95f3850SWill Newton 559f95f3850SWill Newton /* Enable the DMA interface */ 560f95f3850SWill Newton temp = mci_readl(host, CTRL); 561f95f3850SWill Newton temp |= SDMMC_CTRL_DMA_ENABLE; 562f95f3850SWill Newton mci_writel(host, CTRL, temp); 563f95f3850SWill Newton 564f95f3850SWill Newton /* Disable RX/TX IRQs, let DMA handle it */ 565f95f3850SWill Newton temp = mci_readl(host, INTMASK); 566f95f3850SWill Newton temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); 567f95f3850SWill Newton mci_writel(host, INTMASK, temp); 568f95f3850SWill Newton 569f95f3850SWill Newton host->dma_ops->start(host, sg_len); 570f95f3850SWill Newton 571f95f3850SWill Newton return 0; 572f95f3850SWill Newton } 573f95f3850SWill Newton 574f95f3850SWill Newton static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) 575f95f3850SWill Newton { 576f95f3850SWill Newton u32 temp; 577f95f3850SWill Newton 578f95f3850SWill Newton data->error = -EINPROGRESS; 579f95f3850SWill Newton 580f95f3850SWill Newton WARN_ON(host->data); 581f95f3850SWill Newton host->sg = NULL; 582f95f3850SWill Newton host->data = data; 583f95f3850SWill Newton 58455c5efbcSJames Hogan if (data->flags & MMC_DATA_READ) 58555c5efbcSJames Hogan host->dir_status = DW_MCI_RECV_STATUS; 58655c5efbcSJames Hogan else 58755c5efbcSJames Hogan host->dir_status = DW_MCI_SEND_STATUS; 58855c5efbcSJames Hogan 589f95f3850SWill Newton if (dw_mci_submit_data_dma(host, data)) { 590f9c2a0dcSSeungwon Jeon int flags = SG_MITER_ATOMIC; 591f9c2a0dcSSeungwon Jeon if (host->data->flags & MMC_DATA_READ) 592f9c2a0dcSSeungwon Jeon flags |= SG_MITER_TO_SG; 593f9c2a0dcSSeungwon Jeon else 594f9c2a0dcSSeungwon Jeon flags |= SG_MITER_FROM_SG; 595f9c2a0dcSSeungwon Jeon 596f9c2a0dcSSeungwon Jeon sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); 597f95f3850SWill Newton host->sg = data->sg; 59834b664a2SJames Hogan host->part_buf_start = 0; 59934b664a2SJames Hogan host->part_buf_count = 0; 600f95f3850SWill Newton 601b40af3aaSJames Hogan mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR); 602f95f3850SWill Newton temp = mci_readl(host, INTMASK); 603f95f3850SWill Newton temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; 604f95f3850SWill Newton mci_writel(host, INTMASK, temp); 605f95f3850SWill Newton 606f95f3850SWill Newton temp = mci_readl(host, CTRL); 607f95f3850SWill Newton temp &= ~SDMMC_CTRL_DMA_ENABLE; 608f95f3850SWill Newton mci_writel(host, CTRL, temp); 609f95f3850SWill Newton } 610f95f3850SWill Newton } 611f95f3850SWill Newton 612f95f3850SWill Newton static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) 613f95f3850SWill Newton { 614f95f3850SWill Newton struct dw_mci *host = slot->host; 615f95f3850SWill Newton unsigned long timeout = jiffies + msecs_to_jiffies(500); 616f95f3850SWill Newton unsigned int cmd_status = 0; 617f95f3850SWill Newton 618f95f3850SWill Newton mci_writel(host, CMDARG, arg); 619f95f3850SWill Newton wmb(); 620f95f3850SWill Newton mci_writel(host, CMD, SDMMC_CMD_START | cmd); 621f95f3850SWill Newton 622f95f3850SWill Newton while (time_before(jiffies, timeout)) { 623f95f3850SWill Newton cmd_status = mci_readl(host, CMD); 624f95f3850SWill Newton if (!(cmd_status & SDMMC_CMD_START)) 625f95f3850SWill Newton return; 626f95f3850SWill Newton } 627f95f3850SWill Newton dev_err(&slot->mmc->class_dev, 628f95f3850SWill Newton "Timeout sending command (cmd %#x arg %#x status %#x)\n", 629f95f3850SWill Newton cmd, arg, cmd_status); 630f95f3850SWill Newton } 631f95f3850SWill Newton 632ab269128SAbhilash Kesavan static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) 633f95f3850SWill Newton { 634f95f3850SWill Newton struct dw_mci *host = slot->host; 635f95f3850SWill Newton u32 div; 6369623b5b9SDoug Anderson u32 clk_en_a; 637f95f3850SWill Newton 638ab269128SAbhilash Kesavan if (slot->clock != host->current_speed || force_clkinit) { 639e419990bSSeungwon Jeon div = host->bus_hz / slot->clock; 640e419990bSSeungwon Jeon if (host->bus_hz % slot->clock && host->bus_hz > slot->clock) 641f95f3850SWill Newton /* 642f95f3850SWill Newton * move the + 1 after the divide to prevent 643f95f3850SWill Newton * over-clocking the card. 644f95f3850SWill Newton */ 645e419990bSSeungwon Jeon div += 1; 646e419990bSSeungwon Jeon 647e419990bSSeungwon Jeon div = (host->bus_hz != slot->clock) ? DIV_ROUND_UP(div, 2) : 0; 648f95f3850SWill Newton 649f95f3850SWill Newton dev_info(&slot->mmc->class_dev, 650f95f3850SWill Newton "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ" 651f95f3850SWill Newton " div = %d)\n", slot->id, host->bus_hz, slot->clock, 652f95f3850SWill Newton div ? ((host->bus_hz / div) >> 1) : host->bus_hz, div); 653f95f3850SWill Newton 654f95f3850SWill Newton /* disable clock */ 655f95f3850SWill Newton mci_writel(host, CLKENA, 0); 656f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 657f95f3850SWill Newton 658f95f3850SWill Newton /* inform CIU */ 659f95f3850SWill Newton mci_send_cmd(slot, 660f95f3850SWill Newton SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); 661f95f3850SWill Newton 662f95f3850SWill Newton /* set clock to desired speed */ 663f95f3850SWill Newton mci_writel(host, CLKDIV, div); 664f95f3850SWill Newton 665f95f3850SWill Newton /* inform CIU */ 666f95f3850SWill Newton mci_send_cmd(slot, 667f95f3850SWill Newton SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); 668f95f3850SWill Newton 6699623b5b9SDoug Anderson /* enable clock; only low power if no SDIO */ 6709623b5b9SDoug Anderson clk_en_a = SDMMC_CLKEN_ENABLE << slot->id; 6719623b5b9SDoug Anderson if (!(mci_readl(host, INTMASK) & SDMMC_INT_SDIO(slot->id))) 6729623b5b9SDoug Anderson clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id; 6739623b5b9SDoug Anderson mci_writel(host, CLKENA, clk_en_a); 674f95f3850SWill Newton 675f95f3850SWill Newton /* inform CIU */ 676f95f3850SWill Newton mci_send_cmd(slot, 677f95f3850SWill Newton SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); 678f95f3850SWill Newton 679f95f3850SWill Newton host->current_speed = slot->clock; 680f95f3850SWill Newton } 681f95f3850SWill Newton 682f95f3850SWill Newton /* Set the current slot bus width */ 6831d56c453SSeungwon Jeon mci_writel(host, CTYPE, (slot->ctype << slot->id)); 684f95f3850SWill Newton } 685f95f3850SWill Newton 686053b3ce6SSeungwon Jeon static void __dw_mci_start_request(struct dw_mci *host, 687053b3ce6SSeungwon Jeon struct dw_mci_slot *slot, 688053b3ce6SSeungwon Jeon struct mmc_command *cmd) 689f95f3850SWill Newton { 690f95f3850SWill Newton struct mmc_request *mrq; 691f95f3850SWill Newton struct mmc_data *data; 692f95f3850SWill Newton u32 cmdflags; 693f95f3850SWill Newton 694f95f3850SWill Newton mrq = slot->mrq; 695f95f3850SWill Newton if (host->pdata->select_slot) 696f95f3850SWill Newton host->pdata->select_slot(slot->id); 697f95f3850SWill Newton 698f95f3850SWill Newton host->cur_slot = slot; 699f95f3850SWill Newton host->mrq = mrq; 700f95f3850SWill Newton 701f95f3850SWill Newton host->pending_events = 0; 702f95f3850SWill Newton host->completed_events = 0; 703f95f3850SWill Newton host->data_status = 0; 704f95f3850SWill Newton 705053b3ce6SSeungwon Jeon data = cmd->data; 706f95f3850SWill Newton if (data) { 707f95f3850SWill Newton dw_mci_set_timeout(host); 708f95f3850SWill Newton mci_writel(host, BYTCNT, data->blksz*data->blocks); 709f95f3850SWill Newton mci_writel(host, BLKSIZ, data->blksz); 710f95f3850SWill Newton } 711f95f3850SWill Newton 712f95f3850SWill Newton cmdflags = dw_mci_prepare_command(slot->mmc, cmd); 713f95f3850SWill Newton 714f95f3850SWill Newton /* this is the first command, send the initialization clock */ 715f95f3850SWill Newton if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) 716f95f3850SWill Newton cmdflags |= SDMMC_CMD_INIT; 717f95f3850SWill Newton 718f95f3850SWill Newton if (data) { 719f95f3850SWill Newton dw_mci_submit_data(host, data); 720f95f3850SWill Newton wmb(); 721f95f3850SWill Newton } 722f95f3850SWill Newton 723f95f3850SWill Newton dw_mci_start_command(host, cmd, cmdflags); 724f95f3850SWill Newton 725f95f3850SWill Newton if (mrq->stop) 726f95f3850SWill Newton host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); 727f95f3850SWill Newton } 728f95f3850SWill Newton 729053b3ce6SSeungwon Jeon static void dw_mci_start_request(struct dw_mci *host, 730053b3ce6SSeungwon Jeon struct dw_mci_slot *slot) 731053b3ce6SSeungwon Jeon { 732053b3ce6SSeungwon Jeon struct mmc_request *mrq = slot->mrq; 733053b3ce6SSeungwon Jeon struct mmc_command *cmd; 734053b3ce6SSeungwon Jeon 735053b3ce6SSeungwon Jeon cmd = mrq->sbc ? mrq->sbc : mrq->cmd; 736053b3ce6SSeungwon Jeon __dw_mci_start_request(host, slot, cmd); 737053b3ce6SSeungwon Jeon } 738053b3ce6SSeungwon Jeon 7397456caaeSJames Hogan /* must be called with host->lock held */ 740f95f3850SWill Newton static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, 741f95f3850SWill Newton struct mmc_request *mrq) 742f95f3850SWill Newton { 743f95f3850SWill Newton dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", 744f95f3850SWill Newton host->state); 745f95f3850SWill Newton 746f95f3850SWill Newton slot->mrq = mrq; 747f95f3850SWill Newton 748f95f3850SWill Newton if (host->state == STATE_IDLE) { 749f95f3850SWill Newton host->state = STATE_SENDING_CMD; 750f95f3850SWill Newton dw_mci_start_request(host, slot); 751f95f3850SWill Newton } else { 752f95f3850SWill Newton list_add_tail(&slot->queue_node, &host->queue); 753f95f3850SWill Newton } 754f95f3850SWill Newton } 755f95f3850SWill Newton 756f95f3850SWill Newton static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) 757f95f3850SWill Newton { 758f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 759f95f3850SWill Newton struct dw_mci *host = slot->host; 760f95f3850SWill Newton 761f95f3850SWill Newton WARN_ON(slot->mrq); 762f95f3850SWill Newton 7637456caaeSJames Hogan /* 7647456caaeSJames Hogan * The check for card presence and queueing of the request must be 7657456caaeSJames Hogan * atomic, otherwise the card could be removed in between and the 7667456caaeSJames Hogan * request wouldn't fail until another card was inserted. 7677456caaeSJames Hogan */ 7687456caaeSJames Hogan spin_lock_bh(&host->lock); 7697456caaeSJames Hogan 770f95f3850SWill Newton if (!test_bit(DW_MMC_CARD_PRESENT, &slot->flags)) { 7717456caaeSJames Hogan spin_unlock_bh(&host->lock); 772f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 773f95f3850SWill Newton mmc_request_done(mmc, mrq); 774f95f3850SWill Newton return; 775f95f3850SWill Newton } 776f95f3850SWill Newton 777f95f3850SWill Newton dw_mci_queue_request(host, slot, mrq); 7787456caaeSJames Hogan 7797456caaeSJames Hogan spin_unlock_bh(&host->lock); 780f95f3850SWill Newton } 781f95f3850SWill Newton 782f95f3850SWill Newton static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 783f95f3850SWill Newton { 784f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 785e95baf13SArnd Bergmann const struct dw_mci_drv_data *drv_data = slot->host->drv_data; 78641babf75SJaehoon Chung u32 regs; 787f95f3850SWill Newton 788f95f3850SWill Newton switch (ios->bus_width) { 789f95f3850SWill Newton case MMC_BUS_WIDTH_4: 790f95f3850SWill Newton slot->ctype = SDMMC_CTYPE_4BIT; 791f95f3850SWill Newton break; 792c9b2a06fSJaehoon Chung case MMC_BUS_WIDTH_8: 793c9b2a06fSJaehoon Chung slot->ctype = SDMMC_CTYPE_8BIT; 794c9b2a06fSJaehoon Chung break; 795b2f7cb45SJaehoon Chung default: 796b2f7cb45SJaehoon Chung /* set default 1 bit mode */ 797b2f7cb45SJaehoon Chung slot->ctype = SDMMC_CTYPE_1BIT; 798f95f3850SWill Newton } 799f95f3850SWill Newton 80041babf75SJaehoon Chung regs = mci_readl(slot->host, UHS_REG); 8013f514291SSeungwon Jeon 8023f514291SSeungwon Jeon /* DDR mode set */ 8033f514291SSeungwon Jeon if (ios->timing == MMC_TIMING_UHS_DDR50) 804c69042a5SHyeonsu Kim regs |= ((0x1 << slot->id) << 16); 8053f514291SSeungwon Jeon else 806c69042a5SHyeonsu Kim regs &= ~((0x1 << slot->id) << 16); 8073f514291SSeungwon Jeon 80841babf75SJaehoon Chung mci_writel(slot->host, UHS_REG, regs); 80941babf75SJaehoon Chung 810f95f3850SWill Newton if (ios->clock) { 811f95f3850SWill Newton /* 812f95f3850SWill Newton * Use mirror of ios->clock to prevent race with mmc 813f95f3850SWill Newton * core ios update when finding the minimum. 814f95f3850SWill Newton */ 815f95f3850SWill Newton slot->clock = ios->clock; 816f95f3850SWill Newton } 817f95f3850SWill Newton 818cb27a843SJames Hogan if (drv_data && drv_data->set_ios) 819cb27a843SJames Hogan drv_data->set_ios(slot->host, ios); 820800d78bfSThomas Abraham 821bf7cb224SJaehoon Chung /* Slot specific timing and width adjustment */ 822bf7cb224SJaehoon Chung dw_mci_setup_bus(slot, false); 823bf7cb224SJaehoon Chung 824f95f3850SWill Newton switch (ios->power_mode) { 825f95f3850SWill Newton case MMC_POWER_UP: 826f95f3850SWill Newton set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); 827e6f34e2fSJames Hogan /* Power up slot */ 828e6f34e2fSJames Hogan if (slot->host->pdata->setpower) 829e6f34e2fSJames Hogan slot->host->pdata->setpower(slot->id, mmc->ocr_avail); 8304366dcc5SJaehoon Chung regs = mci_readl(slot->host, PWREN); 8314366dcc5SJaehoon Chung regs |= (1 << slot->id); 8324366dcc5SJaehoon Chung mci_writel(slot->host, PWREN, regs); 833e6f34e2fSJames Hogan break; 834e6f34e2fSJames Hogan case MMC_POWER_OFF: 835e6f34e2fSJames Hogan /* Power down slot */ 836e6f34e2fSJames Hogan if (slot->host->pdata->setpower) 837e6f34e2fSJames Hogan slot->host->pdata->setpower(slot->id, 0); 8384366dcc5SJaehoon Chung regs = mci_readl(slot->host, PWREN); 8394366dcc5SJaehoon Chung regs &= ~(1 << slot->id); 8404366dcc5SJaehoon Chung mci_writel(slot->host, PWREN, regs); 841f95f3850SWill Newton break; 842f95f3850SWill Newton default: 843f95f3850SWill Newton break; 844f95f3850SWill Newton } 845f95f3850SWill Newton } 846f95f3850SWill Newton 847f95f3850SWill Newton static int dw_mci_get_ro(struct mmc_host *mmc) 848f95f3850SWill Newton { 849f95f3850SWill Newton int read_only; 850f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 851f95f3850SWill Newton struct dw_mci_board *brd = slot->host->pdata; 852f95f3850SWill Newton 853f95f3850SWill Newton /* Use platform get_ro function, else try on board write protect */ 8549640639bSDoug Anderson if (slot->quirks & DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT) 855b4967aa5SThomas Abraham read_only = 0; 856b4967aa5SThomas Abraham else if (brd->get_ro) 857f95f3850SWill Newton read_only = brd->get_ro(slot->id); 85855a6ceb2SDoug Anderson else if (gpio_is_valid(slot->wp_gpio)) 85955a6ceb2SDoug Anderson read_only = gpio_get_value(slot->wp_gpio); 860f95f3850SWill Newton else 861f95f3850SWill Newton read_only = 862f95f3850SWill Newton mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; 863f95f3850SWill Newton 864f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is %s\n", 865f95f3850SWill Newton read_only ? "read-only" : "read-write"); 866f95f3850SWill Newton 867f95f3850SWill Newton return read_only; 868f95f3850SWill Newton } 869f95f3850SWill Newton 870f95f3850SWill Newton static int dw_mci_get_cd(struct mmc_host *mmc) 871f95f3850SWill Newton { 872f95f3850SWill Newton int present; 873f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 874f95f3850SWill Newton struct dw_mci_board *brd = slot->host->pdata; 875f95f3850SWill Newton 876f95f3850SWill Newton /* Use platform get_cd function, else try onboard card detect */ 877fc3d7720SJaehoon Chung if (brd->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION) 878fc3d7720SJaehoon Chung present = 1; 879fc3d7720SJaehoon Chung else if (brd->get_cd) 880f95f3850SWill Newton present = !brd->get_cd(slot->id); 881f95f3850SWill Newton else 882f95f3850SWill Newton present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) 883f95f3850SWill Newton == 0 ? 1 : 0; 884f95f3850SWill Newton 885f95f3850SWill Newton if (present) 886f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is present\n"); 887f95f3850SWill Newton else 888f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is not present\n"); 889f95f3850SWill Newton 890f95f3850SWill Newton return present; 891f95f3850SWill Newton } 892f95f3850SWill Newton 8939623b5b9SDoug Anderson /* 8949623b5b9SDoug Anderson * Disable lower power mode. 8959623b5b9SDoug Anderson * 8969623b5b9SDoug Anderson * Low power mode will stop the card clock when idle. According to the 8979623b5b9SDoug Anderson * description of the CLKENA register we should disable low power mode 8989623b5b9SDoug Anderson * for SDIO cards if we need SDIO interrupts to work. 8999623b5b9SDoug Anderson * 9009623b5b9SDoug Anderson * This function is fast if low power mode is already disabled. 9019623b5b9SDoug Anderson */ 9029623b5b9SDoug Anderson static void dw_mci_disable_low_power(struct dw_mci_slot *slot) 9039623b5b9SDoug Anderson { 9049623b5b9SDoug Anderson struct dw_mci *host = slot->host; 9059623b5b9SDoug Anderson u32 clk_en_a; 9069623b5b9SDoug Anderson const u32 clken_low_pwr = SDMMC_CLKEN_LOW_PWR << slot->id; 9079623b5b9SDoug Anderson 9089623b5b9SDoug Anderson clk_en_a = mci_readl(host, CLKENA); 9099623b5b9SDoug Anderson 9109623b5b9SDoug Anderson if (clk_en_a & clken_low_pwr) { 9119623b5b9SDoug Anderson mci_writel(host, CLKENA, clk_en_a & ~clken_low_pwr); 9129623b5b9SDoug Anderson mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | 9139623b5b9SDoug Anderson SDMMC_CMD_PRV_DAT_WAIT, 0); 9149623b5b9SDoug Anderson } 9159623b5b9SDoug Anderson } 9169623b5b9SDoug Anderson 9171a5c8e1fSShashidhar Hiremath static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) 9181a5c8e1fSShashidhar Hiremath { 9191a5c8e1fSShashidhar Hiremath struct dw_mci_slot *slot = mmc_priv(mmc); 9201a5c8e1fSShashidhar Hiremath struct dw_mci *host = slot->host; 9211a5c8e1fSShashidhar Hiremath u32 int_mask; 9221a5c8e1fSShashidhar Hiremath 9231a5c8e1fSShashidhar Hiremath /* Enable/disable Slot Specific SDIO interrupt */ 9241a5c8e1fSShashidhar Hiremath int_mask = mci_readl(host, INTMASK); 9251a5c8e1fSShashidhar Hiremath if (enb) { 9269623b5b9SDoug Anderson /* 9279623b5b9SDoug Anderson * Turn off low power mode if it was enabled. This is a bit of 9289623b5b9SDoug Anderson * a heavy operation and we disable / enable IRQs a lot, so 9299623b5b9SDoug Anderson * we'll leave low power mode disabled and it will get 9309623b5b9SDoug Anderson * re-enabled again in dw_mci_setup_bus(). 9319623b5b9SDoug Anderson */ 9329623b5b9SDoug Anderson dw_mci_disable_low_power(slot); 9339623b5b9SDoug Anderson 9341a5c8e1fSShashidhar Hiremath mci_writel(host, INTMASK, 935705ad047SKyoungil Kim (int_mask | SDMMC_INT_SDIO(slot->id))); 9361a5c8e1fSShashidhar Hiremath } else { 9371a5c8e1fSShashidhar Hiremath mci_writel(host, INTMASK, 938705ad047SKyoungil Kim (int_mask & ~SDMMC_INT_SDIO(slot->id))); 9391a5c8e1fSShashidhar Hiremath } 9401a5c8e1fSShashidhar Hiremath } 9411a5c8e1fSShashidhar Hiremath 942f95f3850SWill Newton static const struct mmc_host_ops dw_mci_ops = { 943f95f3850SWill Newton .request = dw_mci_request, 9449aa51408SSeungwon Jeon .pre_req = dw_mci_pre_req, 9459aa51408SSeungwon Jeon .post_req = dw_mci_post_req, 946f95f3850SWill Newton .set_ios = dw_mci_set_ios, 947f95f3850SWill Newton .get_ro = dw_mci_get_ro, 948f95f3850SWill Newton .get_cd = dw_mci_get_cd, 9491a5c8e1fSShashidhar Hiremath .enable_sdio_irq = dw_mci_enable_sdio_irq, 950f95f3850SWill Newton }; 951f95f3850SWill Newton 952f95f3850SWill Newton static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) 953f95f3850SWill Newton __releases(&host->lock) 954f95f3850SWill Newton __acquires(&host->lock) 955f95f3850SWill Newton { 956f95f3850SWill Newton struct dw_mci_slot *slot; 957f95f3850SWill Newton struct mmc_host *prev_mmc = host->cur_slot->mmc; 958f95f3850SWill Newton 959f95f3850SWill Newton WARN_ON(host->cmd || host->data); 960f95f3850SWill Newton 961f95f3850SWill Newton host->cur_slot->mrq = NULL; 962f95f3850SWill Newton host->mrq = NULL; 963f95f3850SWill Newton if (!list_empty(&host->queue)) { 964f95f3850SWill Newton slot = list_entry(host->queue.next, 965f95f3850SWill Newton struct dw_mci_slot, queue_node); 966f95f3850SWill Newton list_del(&slot->queue_node); 9674a90920cSThomas Abraham dev_vdbg(host->dev, "list not empty: %s is next\n", 968f95f3850SWill Newton mmc_hostname(slot->mmc)); 969f95f3850SWill Newton host->state = STATE_SENDING_CMD; 970f95f3850SWill Newton dw_mci_start_request(host, slot); 971f95f3850SWill Newton } else { 9724a90920cSThomas Abraham dev_vdbg(host->dev, "list empty\n"); 973f95f3850SWill Newton host->state = STATE_IDLE; 974f95f3850SWill Newton } 975f95f3850SWill Newton 976f95f3850SWill Newton spin_unlock(&host->lock); 977f95f3850SWill Newton mmc_request_done(prev_mmc, mrq); 978f95f3850SWill Newton spin_lock(&host->lock); 979f95f3850SWill Newton } 980f95f3850SWill Newton 981f95f3850SWill Newton static void dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) 982f95f3850SWill Newton { 983f95f3850SWill Newton u32 status = host->cmd_status; 984f95f3850SWill Newton 985f95f3850SWill Newton host->cmd_status = 0; 986f95f3850SWill Newton 987f95f3850SWill Newton /* Read the response from the card (up to 16 bytes) */ 988f95f3850SWill Newton if (cmd->flags & MMC_RSP_PRESENT) { 989f95f3850SWill Newton if (cmd->flags & MMC_RSP_136) { 990f95f3850SWill Newton cmd->resp[3] = mci_readl(host, RESP0); 991f95f3850SWill Newton cmd->resp[2] = mci_readl(host, RESP1); 992f95f3850SWill Newton cmd->resp[1] = mci_readl(host, RESP2); 993f95f3850SWill Newton cmd->resp[0] = mci_readl(host, RESP3); 994f95f3850SWill Newton } else { 995f95f3850SWill Newton cmd->resp[0] = mci_readl(host, RESP0); 996f95f3850SWill Newton cmd->resp[1] = 0; 997f95f3850SWill Newton cmd->resp[2] = 0; 998f95f3850SWill Newton cmd->resp[3] = 0; 999f95f3850SWill Newton } 1000f95f3850SWill Newton } 1001f95f3850SWill Newton 1002f95f3850SWill Newton if (status & SDMMC_INT_RTO) 1003f95f3850SWill Newton cmd->error = -ETIMEDOUT; 1004f95f3850SWill Newton else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) 1005f95f3850SWill Newton cmd->error = -EILSEQ; 1006f95f3850SWill Newton else if (status & SDMMC_INT_RESP_ERR) 1007f95f3850SWill Newton cmd->error = -EIO; 1008f95f3850SWill Newton else 1009f95f3850SWill Newton cmd->error = 0; 1010f95f3850SWill Newton 1011f95f3850SWill Newton if (cmd->error) { 1012f95f3850SWill Newton /* newer ip versions need a delay between retries */ 1013f95f3850SWill Newton if (host->quirks & DW_MCI_QUIRK_RETRY_DELAY) 1014f95f3850SWill Newton mdelay(20); 1015f95f3850SWill Newton 1016f95f3850SWill Newton if (cmd->data) { 1017f95f3850SWill Newton dw_mci_stop_dma(host); 1018fda5f736SSeungwon Jeon host->data = NULL; 1019f95f3850SWill Newton } 1020f95f3850SWill Newton } 1021f95f3850SWill Newton } 1022f95f3850SWill Newton 1023f95f3850SWill Newton static void dw_mci_tasklet_func(unsigned long priv) 1024f95f3850SWill Newton { 1025f95f3850SWill Newton struct dw_mci *host = (struct dw_mci *)priv; 1026f95f3850SWill Newton struct mmc_data *data; 1027f95f3850SWill Newton struct mmc_command *cmd; 1028f95f3850SWill Newton enum dw_mci_state state; 1029f95f3850SWill Newton enum dw_mci_state prev_state; 103094dd5b33SJames Hogan u32 status, ctrl; 1031f95f3850SWill Newton 1032f95f3850SWill Newton spin_lock(&host->lock); 1033f95f3850SWill Newton 1034f95f3850SWill Newton state = host->state; 1035f95f3850SWill Newton data = host->data; 1036f95f3850SWill Newton 1037f95f3850SWill Newton do { 1038f95f3850SWill Newton prev_state = state; 1039f95f3850SWill Newton 1040f95f3850SWill Newton switch (state) { 1041f95f3850SWill Newton case STATE_IDLE: 1042f95f3850SWill Newton break; 1043f95f3850SWill Newton 1044f95f3850SWill Newton case STATE_SENDING_CMD: 1045f95f3850SWill Newton if (!test_and_clear_bit(EVENT_CMD_COMPLETE, 1046f95f3850SWill Newton &host->pending_events)) 1047f95f3850SWill Newton break; 1048f95f3850SWill Newton 1049f95f3850SWill Newton cmd = host->cmd; 1050f95f3850SWill Newton host->cmd = NULL; 1051f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->completed_events); 1052053b3ce6SSeungwon Jeon dw_mci_command_complete(host, cmd); 1053053b3ce6SSeungwon Jeon if (cmd == host->mrq->sbc && !cmd->error) { 1054053b3ce6SSeungwon Jeon prev_state = state = STATE_SENDING_CMD; 1055053b3ce6SSeungwon Jeon __dw_mci_start_request(host, host->cur_slot, 1056053b3ce6SSeungwon Jeon host->mrq->cmd); 1057053b3ce6SSeungwon Jeon goto unlock; 1058053b3ce6SSeungwon Jeon } 1059053b3ce6SSeungwon Jeon 1060f95f3850SWill Newton if (!host->mrq->data || cmd->error) { 1061f95f3850SWill Newton dw_mci_request_end(host, host->mrq); 1062f95f3850SWill Newton goto unlock; 1063f95f3850SWill Newton } 1064f95f3850SWill Newton 1065f95f3850SWill Newton prev_state = state = STATE_SENDING_DATA; 1066f95f3850SWill Newton /* fall through */ 1067f95f3850SWill Newton 1068f95f3850SWill Newton case STATE_SENDING_DATA: 1069f95f3850SWill Newton if (test_and_clear_bit(EVENT_DATA_ERROR, 1070f95f3850SWill Newton &host->pending_events)) { 1071f95f3850SWill Newton dw_mci_stop_dma(host); 1072f95f3850SWill Newton if (data->stop) 1073f95f3850SWill Newton send_stop_cmd(host, data); 1074f95f3850SWill Newton state = STATE_DATA_ERROR; 1075f95f3850SWill Newton break; 1076f95f3850SWill Newton } 1077f95f3850SWill Newton 1078f95f3850SWill Newton if (!test_and_clear_bit(EVENT_XFER_COMPLETE, 1079f95f3850SWill Newton &host->pending_events)) 1080f95f3850SWill Newton break; 1081f95f3850SWill Newton 1082f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->completed_events); 1083f95f3850SWill Newton prev_state = state = STATE_DATA_BUSY; 1084f95f3850SWill Newton /* fall through */ 1085f95f3850SWill Newton 1086f95f3850SWill Newton case STATE_DATA_BUSY: 1087f95f3850SWill Newton if (!test_and_clear_bit(EVENT_DATA_COMPLETE, 1088f95f3850SWill Newton &host->pending_events)) 1089f95f3850SWill Newton break; 1090f95f3850SWill Newton 1091f95f3850SWill Newton host->data = NULL; 1092f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->completed_events); 1093f95f3850SWill Newton status = host->data_status; 1094f95f3850SWill Newton 1095f95f3850SWill Newton if (status & DW_MCI_DATA_ERROR_FLAGS) { 10963f7eec62SJaehoon Chung if (status & SDMMC_INT_DRTO) { 1097f95f3850SWill Newton data->error = -ETIMEDOUT; 1098f95f3850SWill Newton } else if (status & SDMMC_INT_DCRC) { 1099f95f3850SWill Newton data->error = -EILSEQ; 110055c5efbcSJames Hogan } else if (status & SDMMC_INT_EBE && 110155c5efbcSJames Hogan host->dir_status == 110255c5efbcSJames Hogan DW_MCI_SEND_STATUS) { 110355c5efbcSJames Hogan /* 110455c5efbcSJames Hogan * No data CRC status was returned. 110555c5efbcSJames Hogan * The number of bytes transferred will 110655c5efbcSJames Hogan * be exaggerated in PIO mode. 110755c5efbcSJames Hogan */ 110855c5efbcSJames Hogan data->bytes_xfered = 0; 110955c5efbcSJames Hogan data->error = -ETIMEDOUT; 1110f95f3850SWill Newton } else { 11114a90920cSThomas Abraham dev_err(host->dev, 1112f95f3850SWill Newton "data FIFO error " 1113f95f3850SWill Newton "(status=%08x)\n", 1114f95f3850SWill Newton status); 1115f95f3850SWill Newton data->error = -EIO; 1116f95f3850SWill Newton } 111794dd5b33SJames Hogan /* 111894dd5b33SJames Hogan * After an error, there may be data lingering 111994dd5b33SJames Hogan * in the FIFO, so reset it - doing so 112094dd5b33SJames Hogan * generates a block interrupt, hence setting 112194dd5b33SJames Hogan * the scatter-gather pointer to NULL. 112294dd5b33SJames Hogan */ 1123f9c2a0dcSSeungwon Jeon sg_miter_stop(&host->sg_miter); 112494dd5b33SJames Hogan host->sg = NULL; 112594dd5b33SJames Hogan ctrl = mci_readl(host, CTRL); 112694dd5b33SJames Hogan ctrl |= SDMMC_CTRL_FIFO_RESET; 112794dd5b33SJames Hogan mci_writel(host, CTRL, ctrl); 1128f95f3850SWill Newton } else { 1129f95f3850SWill Newton data->bytes_xfered = data->blocks * data->blksz; 1130f95f3850SWill Newton data->error = 0; 1131f95f3850SWill Newton } 1132f95f3850SWill Newton 1133f95f3850SWill Newton if (!data->stop) { 1134f95f3850SWill Newton dw_mci_request_end(host, host->mrq); 1135f95f3850SWill Newton goto unlock; 1136f95f3850SWill Newton } 1137f95f3850SWill Newton 1138053b3ce6SSeungwon Jeon if (host->mrq->sbc && !data->error) { 1139053b3ce6SSeungwon Jeon data->stop->error = 0; 1140053b3ce6SSeungwon Jeon dw_mci_request_end(host, host->mrq); 1141053b3ce6SSeungwon Jeon goto unlock; 1142053b3ce6SSeungwon Jeon } 1143053b3ce6SSeungwon Jeon 1144f95f3850SWill Newton prev_state = state = STATE_SENDING_STOP; 1145f95f3850SWill Newton if (!data->error) 1146f95f3850SWill Newton send_stop_cmd(host, data); 1147f95f3850SWill Newton /* fall through */ 1148f95f3850SWill Newton 1149f95f3850SWill Newton case STATE_SENDING_STOP: 1150f95f3850SWill Newton if (!test_and_clear_bit(EVENT_CMD_COMPLETE, 1151f95f3850SWill Newton &host->pending_events)) 1152f95f3850SWill Newton break; 1153f95f3850SWill Newton 1154f95f3850SWill Newton host->cmd = NULL; 1155f95f3850SWill Newton dw_mci_command_complete(host, host->mrq->stop); 1156f95f3850SWill Newton dw_mci_request_end(host, host->mrq); 1157f95f3850SWill Newton goto unlock; 1158f95f3850SWill Newton 1159f95f3850SWill Newton case STATE_DATA_ERROR: 1160f95f3850SWill Newton if (!test_and_clear_bit(EVENT_XFER_COMPLETE, 1161f95f3850SWill Newton &host->pending_events)) 1162f95f3850SWill Newton break; 1163f95f3850SWill Newton 1164f95f3850SWill Newton state = STATE_DATA_BUSY; 1165f95f3850SWill Newton break; 1166f95f3850SWill Newton } 1167f95f3850SWill Newton } while (state != prev_state); 1168f95f3850SWill Newton 1169f95f3850SWill Newton host->state = state; 1170f95f3850SWill Newton unlock: 1171f95f3850SWill Newton spin_unlock(&host->lock); 1172f95f3850SWill Newton 1173f95f3850SWill Newton } 1174f95f3850SWill Newton 117534b664a2SJames Hogan /* push final bytes to part_buf, only use during push */ 117634b664a2SJames Hogan static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt) 117734b664a2SJames Hogan { 117834b664a2SJames Hogan memcpy((void *)&host->part_buf, buf, cnt); 117934b664a2SJames Hogan host->part_buf_count = cnt; 118034b664a2SJames Hogan } 118134b664a2SJames Hogan 118234b664a2SJames Hogan /* append bytes to part_buf, only use during push */ 118334b664a2SJames Hogan static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt) 118434b664a2SJames Hogan { 118534b664a2SJames Hogan cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count); 118634b664a2SJames Hogan memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt); 118734b664a2SJames Hogan host->part_buf_count += cnt; 118834b664a2SJames Hogan return cnt; 118934b664a2SJames Hogan } 119034b664a2SJames Hogan 119134b664a2SJames Hogan /* pull first bytes from part_buf, only use during pull */ 119234b664a2SJames Hogan static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt) 119334b664a2SJames Hogan { 119434b664a2SJames Hogan cnt = min(cnt, (int)host->part_buf_count); 119534b664a2SJames Hogan if (cnt) { 119634b664a2SJames Hogan memcpy(buf, (void *)&host->part_buf + host->part_buf_start, 119734b664a2SJames Hogan cnt); 119834b664a2SJames Hogan host->part_buf_count -= cnt; 119934b664a2SJames Hogan host->part_buf_start += cnt; 120034b664a2SJames Hogan } 120134b664a2SJames Hogan return cnt; 120234b664a2SJames Hogan } 120334b664a2SJames Hogan 120434b664a2SJames Hogan /* pull final bytes from the part_buf, assuming it's just been filled */ 120534b664a2SJames Hogan static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt) 120634b664a2SJames Hogan { 120734b664a2SJames Hogan memcpy(buf, &host->part_buf, cnt); 120834b664a2SJames Hogan host->part_buf_start = cnt; 120934b664a2SJames Hogan host->part_buf_count = (1 << host->data_shift) - cnt; 121034b664a2SJames Hogan } 121134b664a2SJames Hogan 1212f95f3850SWill Newton static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) 1213f95f3850SWill Newton { 1214cfbeb59cSMarkos Chandras struct mmc_data *data = host->data; 1215cfbeb59cSMarkos Chandras int init_cnt = cnt; 1216cfbeb59cSMarkos Chandras 121734b664a2SJames Hogan /* try and push anything in the part_buf */ 121834b664a2SJames Hogan if (unlikely(host->part_buf_count)) { 121934b664a2SJames Hogan int len = dw_mci_push_part_bytes(host, buf, cnt); 122034b664a2SJames Hogan buf += len; 122134b664a2SJames Hogan cnt -= len; 1222cfbeb59cSMarkos Chandras if (host->part_buf_count == 2) { 12234e0a5adfSJaehoon Chung mci_writew(host, DATA(host->data_offset), 12244e0a5adfSJaehoon Chung host->part_buf16); 122534b664a2SJames Hogan host->part_buf_count = 0; 122634b664a2SJames Hogan } 122734b664a2SJames Hogan } 122834b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 122934b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x1)) { 123034b664a2SJames Hogan while (cnt >= 2) { 123134b664a2SJames Hogan u16 aligned_buf[64]; 123234b664a2SJames Hogan int len = min(cnt & -2, (int)sizeof(aligned_buf)); 123334b664a2SJames Hogan int items = len >> 1; 123434b664a2SJames Hogan int i; 123534b664a2SJames Hogan /* memcpy from input buffer into aligned buffer */ 123634b664a2SJames Hogan memcpy(aligned_buf, buf, len); 123734b664a2SJames Hogan buf += len; 123834b664a2SJames Hogan cnt -= len; 123934b664a2SJames Hogan /* push data from aligned buffer into fifo */ 124034b664a2SJames Hogan for (i = 0; i < items; ++i) 12414e0a5adfSJaehoon Chung mci_writew(host, DATA(host->data_offset), 12424e0a5adfSJaehoon Chung aligned_buf[i]); 124334b664a2SJames Hogan } 124434b664a2SJames Hogan } else 124534b664a2SJames Hogan #endif 124634b664a2SJames Hogan { 124734b664a2SJames Hogan u16 *pdata = buf; 124834b664a2SJames Hogan for (; cnt >= 2; cnt -= 2) 12494e0a5adfSJaehoon Chung mci_writew(host, DATA(host->data_offset), *pdata++); 125034b664a2SJames Hogan buf = pdata; 125134b664a2SJames Hogan } 125234b664a2SJames Hogan /* put anything remaining in the part_buf */ 125334b664a2SJames Hogan if (cnt) { 125434b664a2SJames Hogan dw_mci_set_part_bytes(host, buf, cnt); 1255cfbeb59cSMarkos Chandras /* Push data if we have reached the expected data length */ 1256cfbeb59cSMarkos Chandras if ((data->bytes_xfered + init_cnt) == 1257cfbeb59cSMarkos Chandras (data->blksz * data->blocks)) 12584e0a5adfSJaehoon Chung mci_writew(host, DATA(host->data_offset), 12594e0a5adfSJaehoon Chung host->part_buf16); 1260f95f3850SWill Newton } 1261f95f3850SWill Newton } 1262f95f3850SWill Newton 1263f95f3850SWill Newton static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) 1264f95f3850SWill Newton { 126534b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 126634b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x1)) { 126734b664a2SJames Hogan while (cnt >= 2) { 126834b664a2SJames Hogan /* pull data from fifo into aligned buffer */ 126934b664a2SJames Hogan u16 aligned_buf[64]; 127034b664a2SJames Hogan int len = min(cnt & -2, (int)sizeof(aligned_buf)); 127134b664a2SJames Hogan int items = len >> 1; 127234b664a2SJames Hogan int i; 127334b664a2SJames Hogan for (i = 0; i < items; ++i) 12744e0a5adfSJaehoon Chung aligned_buf[i] = mci_readw(host, 12754e0a5adfSJaehoon Chung DATA(host->data_offset)); 127634b664a2SJames Hogan /* memcpy from aligned buffer into output buffer */ 127734b664a2SJames Hogan memcpy(buf, aligned_buf, len); 127834b664a2SJames Hogan buf += len; 127934b664a2SJames Hogan cnt -= len; 128034b664a2SJames Hogan } 128134b664a2SJames Hogan } else 128234b664a2SJames Hogan #endif 128334b664a2SJames Hogan { 128434b664a2SJames Hogan u16 *pdata = buf; 128534b664a2SJames Hogan for (; cnt >= 2; cnt -= 2) 12864e0a5adfSJaehoon Chung *pdata++ = mci_readw(host, DATA(host->data_offset)); 128734b664a2SJames Hogan buf = pdata; 128834b664a2SJames Hogan } 128934b664a2SJames Hogan if (cnt) { 12904e0a5adfSJaehoon Chung host->part_buf16 = mci_readw(host, DATA(host->data_offset)); 129134b664a2SJames Hogan dw_mci_pull_final_bytes(host, buf, cnt); 1292f95f3850SWill Newton } 1293f95f3850SWill Newton } 1294f95f3850SWill Newton 1295f95f3850SWill Newton static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) 1296f95f3850SWill Newton { 1297cfbeb59cSMarkos Chandras struct mmc_data *data = host->data; 1298cfbeb59cSMarkos Chandras int init_cnt = cnt; 1299cfbeb59cSMarkos Chandras 130034b664a2SJames Hogan /* try and push anything in the part_buf */ 130134b664a2SJames Hogan if (unlikely(host->part_buf_count)) { 130234b664a2SJames Hogan int len = dw_mci_push_part_bytes(host, buf, cnt); 130334b664a2SJames Hogan buf += len; 130434b664a2SJames Hogan cnt -= len; 1305cfbeb59cSMarkos Chandras if (host->part_buf_count == 4) { 13064e0a5adfSJaehoon Chung mci_writel(host, DATA(host->data_offset), 13074e0a5adfSJaehoon Chung host->part_buf32); 130834b664a2SJames Hogan host->part_buf_count = 0; 130934b664a2SJames Hogan } 131034b664a2SJames Hogan } 131134b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 131234b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x3)) { 131334b664a2SJames Hogan while (cnt >= 4) { 131434b664a2SJames Hogan u32 aligned_buf[32]; 131534b664a2SJames Hogan int len = min(cnt & -4, (int)sizeof(aligned_buf)); 131634b664a2SJames Hogan int items = len >> 2; 131734b664a2SJames Hogan int i; 131834b664a2SJames Hogan /* memcpy from input buffer into aligned buffer */ 131934b664a2SJames Hogan memcpy(aligned_buf, buf, len); 132034b664a2SJames Hogan buf += len; 132134b664a2SJames Hogan cnt -= len; 132234b664a2SJames Hogan /* push data from aligned buffer into fifo */ 132334b664a2SJames Hogan for (i = 0; i < items; ++i) 13244e0a5adfSJaehoon Chung mci_writel(host, DATA(host->data_offset), 13254e0a5adfSJaehoon Chung aligned_buf[i]); 132634b664a2SJames Hogan } 132734b664a2SJames Hogan } else 132834b664a2SJames Hogan #endif 132934b664a2SJames Hogan { 133034b664a2SJames Hogan u32 *pdata = buf; 133134b664a2SJames Hogan for (; cnt >= 4; cnt -= 4) 13324e0a5adfSJaehoon Chung mci_writel(host, DATA(host->data_offset), *pdata++); 133334b664a2SJames Hogan buf = pdata; 133434b664a2SJames Hogan } 133534b664a2SJames Hogan /* put anything remaining in the part_buf */ 133634b664a2SJames Hogan if (cnt) { 133734b664a2SJames Hogan dw_mci_set_part_bytes(host, buf, cnt); 1338cfbeb59cSMarkos Chandras /* Push data if we have reached the expected data length */ 1339cfbeb59cSMarkos Chandras if ((data->bytes_xfered + init_cnt) == 1340cfbeb59cSMarkos Chandras (data->blksz * data->blocks)) 13414e0a5adfSJaehoon Chung mci_writel(host, DATA(host->data_offset), 13424e0a5adfSJaehoon Chung host->part_buf32); 1343f95f3850SWill Newton } 1344f95f3850SWill Newton } 1345f95f3850SWill Newton 1346f95f3850SWill Newton static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) 1347f95f3850SWill Newton { 134834b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 134934b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x3)) { 135034b664a2SJames Hogan while (cnt >= 4) { 135134b664a2SJames Hogan /* pull data from fifo into aligned buffer */ 135234b664a2SJames Hogan u32 aligned_buf[32]; 135334b664a2SJames Hogan int len = min(cnt & -4, (int)sizeof(aligned_buf)); 135434b664a2SJames Hogan int items = len >> 2; 135534b664a2SJames Hogan int i; 135634b664a2SJames Hogan for (i = 0; i < items; ++i) 13574e0a5adfSJaehoon Chung aligned_buf[i] = mci_readl(host, 13584e0a5adfSJaehoon Chung DATA(host->data_offset)); 135934b664a2SJames Hogan /* memcpy from aligned buffer into output buffer */ 136034b664a2SJames Hogan memcpy(buf, aligned_buf, len); 136134b664a2SJames Hogan buf += len; 136234b664a2SJames Hogan cnt -= len; 136334b664a2SJames Hogan } 136434b664a2SJames Hogan } else 136534b664a2SJames Hogan #endif 136634b664a2SJames Hogan { 136734b664a2SJames Hogan u32 *pdata = buf; 136834b664a2SJames Hogan for (; cnt >= 4; cnt -= 4) 13694e0a5adfSJaehoon Chung *pdata++ = mci_readl(host, DATA(host->data_offset)); 137034b664a2SJames Hogan buf = pdata; 137134b664a2SJames Hogan } 137234b664a2SJames Hogan if (cnt) { 13734e0a5adfSJaehoon Chung host->part_buf32 = mci_readl(host, DATA(host->data_offset)); 137434b664a2SJames Hogan dw_mci_pull_final_bytes(host, buf, cnt); 1375f95f3850SWill Newton } 1376f95f3850SWill Newton } 1377f95f3850SWill Newton 1378f95f3850SWill Newton static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) 1379f95f3850SWill Newton { 1380cfbeb59cSMarkos Chandras struct mmc_data *data = host->data; 1381cfbeb59cSMarkos Chandras int init_cnt = cnt; 1382cfbeb59cSMarkos Chandras 138334b664a2SJames Hogan /* try and push anything in the part_buf */ 138434b664a2SJames Hogan if (unlikely(host->part_buf_count)) { 138534b664a2SJames Hogan int len = dw_mci_push_part_bytes(host, buf, cnt); 138634b664a2SJames Hogan buf += len; 138734b664a2SJames Hogan cnt -= len; 1388c09fbd74SSeungwon Jeon 1389cfbeb59cSMarkos Chandras if (host->part_buf_count == 8) { 1390c09fbd74SSeungwon Jeon mci_writeq(host, DATA(host->data_offset), 13914e0a5adfSJaehoon Chung host->part_buf); 139234b664a2SJames Hogan host->part_buf_count = 0; 139334b664a2SJames Hogan } 139434b664a2SJames Hogan } 139534b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 139634b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x7)) { 139734b664a2SJames Hogan while (cnt >= 8) { 139834b664a2SJames Hogan u64 aligned_buf[16]; 139934b664a2SJames Hogan int len = min(cnt & -8, (int)sizeof(aligned_buf)); 140034b664a2SJames Hogan int items = len >> 3; 140134b664a2SJames Hogan int i; 140234b664a2SJames Hogan /* memcpy from input buffer into aligned buffer */ 140334b664a2SJames Hogan memcpy(aligned_buf, buf, len); 140434b664a2SJames Hogan buf += len; 140534b664a2SJames Hogan cnt -= len; 140634b664a2SJames Hogan /* push data from aligned buffer into fifo */ 140734b664a2SJames Hogan for (i = 0; i < items; ++i) 14084e0a5adfSJaehoon Chung mci_writeq(host, DATA(host->data_offset), 14094e0a5adfSJaehoon Chung aligned_buf[i]); 141034b664a2SJames Hogan } 141134b664a2SJames Hogan } else 141234b664a2SJames Hogan #endif 141334b664a2SJames Hogan { 141434b664a2SJames Hogan u64 *pdata = buf; 141534b664a2SJames Hogan for (; cnt >= 8; cnt -= 8) 14164e0a5adfSJaehoon Chung mci_writeq(host, DATA(host->data_offset), *pdata++); 141734b664a2SJames Hogan buf = pdata; 141834b664a2SJames Hogan } 141934b664a2SJames Hogan /* put anything remaining in the part_buf */ 142034b664a2SJames Hogan if (cnt) { 142134b664a2SJames Hogan dw_mci_set_part_bytes(host, buf, cnt); 1422cfbeb59cSMarkos Chandras /* Push data if we have reached the expected data length */ 1423cfbeb59cSMarkos Chandras if ((data->bytes_xfered + init_cnt) == 1424cfbeb59cSMarkos Chandras (data->blksz * data->blocks)) 14254e0a5adfSJaehoon Chung mci_writeq(host, DATA(host->data_offset), 14264e0a5adfSJaehoon Chung host->part_buf); 1427f95f3850SWill Newton } 1428f95f3850SWill Newton } 1429f95f3850SWill Newton 1430f95f3850SWill Newton static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) 1431f95f3850SWill Newton { 143234b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 143334b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x7)) { 143434b664a2SJames Hogan while (cnt >= 8) { 143534b664a2SJames Hogan /* pull data from fifo into aligned buffer */ 143634b664a2SJames Hogan u64 aligned_buf[16]; 143734b664a2SJames Hogan int len = min(cnt & -8, (int)sizeof(aligned_buf)); 143834b664a2SJames Hogan int items = len >> 3; 143934b664a2SJames Hogan int i; 144034b664a2SJames Hogan for (i = 0; i < items; ++i) 14414e0a5adfSJaehoon Chung aligned_buf[i] = mci_readq(host, 14424e0a5adfSJaehoon Chung DATA(host->data_offset)); 144334b664a2SJames Hogan /* memcpy from aligned buffer into output buffer */ 144434b664a2SJames Hogan memcpy(buf, aligned_buf, len); 144534b664a2SJames Hogan buf += len; 144634b664a2SJames Hogan cnt -= len; 1447f95f3850SWill Newton } 144834b664a2SJames Hogan } else 144934b664a2SJames Hogan #endif 145034b664a2SJames Hogan { 145134b664a2SJames Hogan u64 *pdata = buf; 145234b664a2SJames Hogan for (; cnt >= 8; cnt -= 8) 14534e0a5adfSJaehoon Chung *pdata++ = mci_readq(host, DATA(host->data_offset)); 145434b664a2SJames Hogan buf = pdata; 145534b664a2SJames Hogan } 145634b664a2SJames Hogan if (cnt) { 14574e0a5adfSJaehoon Chung host->part_buf = mci_readq(host, DATA(host->data_offset)); 145834b664a2SJames Hogan dw_mci_pull_final_bytes(host, buf, cnt); 145934b664a2SJames Hogan } 146034b664a2SJames Hogan } 146134b664a2SJames Hogan 146234b664a2SJames Hogan static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt) 146334b664a2SJames Hogan { 146434b664a2SJames Hogan int len; 146534b664a2SJames Hogan 146634b664a2SJames Hogan /* get remaining partial bytes */ 146734b664a2SJames Hogan len = dw_mci_pull_part_bytes(host, buf, cnt); 146834b664a2SJames Hogan if (unlikely(len == cnt)) 146934b664a2SJames Hogan return; 147034b664a2SJames Hogan buf += len; 147134b664a2SJames Hogan cnt -= len; 147234b664a2SJames Hogan 147334b664a2SJames Hogan /* get the rest of the data */ 147434b664a2SJames Hogan host->pull_data(host, buf, cnt); 1475f95f3850SWill Newton } 1476f95f3850SWill Newton 147787a74d39SKyoungil Kim static void dw_mci_read_data_pio(struct dw_mci *host, bool dto) 1478f95f3850SWill Newton { 1479f9c2a0dcSSeungwon Jeon struct sg_mapping_iter *sg_miter = &host->sg_miter; 1480f9c2a0dcSSeungwon Jeon void *buf; 1481f9c2a0dcSSeungwon Jeon unsigned int offset; 1482f95f3850SWill Newton struct mmc_data *data = host->data; 1483f95f3850SWill Newton int shift = host->data_shift; 1484f95f3850SWill Newton u32 status; 14853e4b0d8bSMarkos Chandras unsigned int len; 1486f9c2a0dcSSeungwon Jeon unsigned int remain, fcnt; 1487f95f3850SWill Newton 1488f95f3850SWill Newton do { 1489f9c2a0dcSSeungwon Jeon if (!sg_miter_next(sg_miter)) 1490f9c2a0dcSSeungwon Jeon goto done; 1491f95f3850SWill Newton 14924225fc85SImre Deak host->sg = sg_miter->piter.sg; 1493f9c2a0dcSSeungwon Jeon buf = sg_miter->addr; 1494f9c2a0dcSSeungwon Jeon remain = sg_miter->length; 1495f9c2a0dcSSeungwon Jeon offset = 0; 1496f9c2a0dcSSeungwon Jeon 1497f9c2a0dcSSeungwon Jeon do { 1498f9c2a0dcSSeungwon Jeon fcnt = (SDMMC_GET_FCNT(mci_readl(host, STATUS)) 1499f9c2a0dcSSeungwon Jeon << shift) + host->part_buf_count; 1500f9c2a0dcSSeungwon Jeon len = min(remain, fcnt); 1501f9c2a0dcSSeungwon Jeon if (!len) 1502f9c2a0dcSSeungwon Jeon break; 1503f9c2a0dcSSeungwon Jeon dw_mci_pull_data(host, (void *)(buf + offset), len); 15043e4b0d8bSMarkos Chandras data->bytes_xfered += len; 1505f95f3850SWill Newton offset += len; 1506f9c2a0dcSSeungwon Jeon remain -= len; 1507f9c2a0dcSSeungwon Jeon } while (remain); 1508f95f3850SWill Newton 1509e74f3a9cSSeungwon Jeon sg_miter->consumed = offset; 1510f95f3850SWill Newton status = mci_readl(host, MINTSTS); 1511f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_RXDR); 151287a74d39SKyoungil Kim /* if the RXDR is ready read again */ 151387a74d39SKyoungil Kim } while ((status & SDMMC_INT_RXDR) || 151487a74d39SKyoungil Kim (dto && SDMMC_GET_FCNT(mci_readl(host, STATUS)))); 1515f9c2a0dcSSeungwon Jeon 1516f9c2a0dcSSeungwon Jeon if (!remain) { 1517f9c2a0dcSSeungwon Jeon if (!sg_miter_next(sg_miter)) 1518f9c2a0dcSSeungwon Jeon goto done; 1519f9c2a0dcSSeungwon Jeon sg_miter->consumed = 0; 1520f9c2a0dcSSeungwon Jeon } 1521f9c2a0dcSSeungwon Jeon sg_miter_stop(sg_miter); 1522f95f3850SWill Newton return; 1523f95f3850SWill Newton 1524f95f3850SWill Newton done: 1525f9c2a0dcSSeungwon Jeon sg_miter_stop(sg_miter); 1526f9c2a0dcSSeungwon Jeon host->sg = NULL; 1527f95f3850SWill Newton smp_wmb(); 1528f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 1529f95f3850SWill Newton } 1530f95f3850SWill Newton 1531f95f3850SWill Newton static void dw_mci_write_data_pio(struct dw_mci *host) 1532f95f3850SWill Newton { 1533f9c2a0dcSSeungwon Jeon struct sg_mapping_iter *sg_miter = &host->sg_miter; 1534f9c2a0dcSSeungwon Jeon void *buf; 1535f9c2a0dcSSeungwon Jeon unsigned int offset; 1536f95f3850SWill Newton struct mmc_data *data = host->data; 1537f95f3850SWill Newton int shift = host->data_shift; 1538f95f3850SWill Newton u32 status; 15393e4b0d8bSMarkos Chandras unsigned int len; 1540f9c2a0dcSSeungwon Jeon unsigned int fifo_depth = host->fifo_depth; 1541f9c2a0dcSSeungwon Jeon unsigned int remain, fcnt; 1542f95f3850SWill Newton 1543f95f3850SWill Newton do { 1544f9c2a0dcSSeungwon Jeon if (!sg_miter_next(sg_miter)) 1545f9c2a0dcSSeungwon Jeon goto done; 1546f95f3850SWill Newton 15474225fc85SImre Deak host->sg = sg_miter->piter.sg; 1548f9c2a0dcSSeungwon Jeon buf = sg_miter->addr; 1549f9c2a0dcSSeungwon Jeon remain = sg_miter->length; 1550f9c2a0dcSSeungwon Jeon offset = 0; 1551f9c2a0dcSSeungwon Jeon 1552f9c2a0dcSSeungwon Jeon do { 1553f9c2a0dcSSeungwon Jeon fcnt = ((fifo_depth - 1554f9c2a0dcSSeungwon Jeon SDMMC_GET_FCNT(mci_readl(host, STATUS))) 1555f9c2a0dcSSeungwon Jeon << shift) - host->part_buf_count; 1556f9c2a0dcSSeungwon Jeon len = min(remain, fcnt); 1557f9c2a0dcSSeungwon Jeon if (!len) 1558f9c2a0dcSSeungwon Jeon break; 1559f9c2a0dcSSeungwon Jeon host->push_data(host, (void *)(buf + offset), len); 15603e4b0d8bSMarkos Chandras data->bytes_xfered += len; 1561f95f3850SWill Newton offset += len; 1562f9c2a0dcSSeungwon Jeon remain -= len; 1563f9c2a0dcSSeungwon Jeon } while (remain); 1564f95f3850SWill Newton 1565e74f3a9cSSeungwon Jeon sg_miter->consumed = offset; 1566f95f3850SWill Newton status = mci_readl(host, MINTSTS); 1567f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_TXDR); 1568f95f3850SWill Newton } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ 1569f9c2a0dcSSeungwon Jeon 1570f9c2a0dcSSeungwon Jeon if (!remain) { 1571f9c2a0dcSSeungwon Jeon if (!sg_miter_next(sg_miter)) 1572f9c2a0dcSSeungwon Jeon goto done; 1573f9c2a0dcSSeungwon Jeon sg_miter->consumed = 0; 1574f9c2a0dcSSeungwon Jeon } 1575f9c2a0dcSSeungwon Jeon sg_miter_stop(sg_miter); 1576f95f3850SWill Newton return; 1577f95f3850SWill Newton 1578f95f3850SWill Newton done: 1579f9c2a0dcSSeungwon Jeon sg_miter_stop(sg_miter); 1580f9c2a0dcSSeungwon Jeon host->sg = NULL; 1581f95f3850SWill Newton smp_wmb(); 1582f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 1583f95f3850SWill Newton } 1584f95f3850SWill Newton 1585f95f3850SWill Newton static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) 1586f95f3850SWill Newton { 1587f95f3850SWill Newton if (!host->cmd_status) 1588f95f3850SWill Newton host->cmd_status = status; 1589f95f3850SWill Newton 1590f95f3850SWill Newton smp_wmb(); 1591f95f3850SWill Newton 1592f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->pending_events); 1593f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1594f95f3850SWill Newton } 1595f95f3850SWill Newton 1596f95f3850SWill Newton static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) 1597f95f3850SWill Newton { 1598f95f3850SWill Newton struct dw_mci *host = dev_id; 1599182c9081SSeungwon Jeon u32 pending; 16001a5c8e1fSShashidhar Hiremath int i; 1601f95f3850SWill Newton 1602f95f3850SWill Newton pending = mci_readl(host, MINTSTS); /* read-only mask reg */ 1603f95f3850SWill Newton 16041fb5f68aSMarkos Chandras if (pending) { 16051fb5f68aSMarkos Chandras 1606f95f3850SWill Newton /* 1607f95f3850SWill Newton * DTO fix - version 2.10a and below, and only if internal DMA 1608f95f3850SWill Newton * is configured. 1609f95f3850SWill Newton */ 1610f95f3850SWill Newton if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) { 1611f95f3850SWill Newton if (!pending && 1612f95f3850SWill Newton ((mci_readl(host, STATUS) >> 17) & 0x1fff)) 1613f95f3850SWill Newton pending |= SDMMC_INT_DATA_OVER; 1614f95f3850SWill Newton } 1615f95f3850SWill Newton 1616f95f3850SWill Newton if (pending & DW_MCI_CMD_ERROR_FLAGS) { 1617f95f3850SWill Newton mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); 1618182c9081SSeungwon Jeon host->cmd_status = pending; 1619f95f3850SWill Newton smp_wmb(); 1620f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->pending_events); 1621f95f3850SWill Newton } 1622f95f3850SWill Newton 1623f95f3850SWill Newton if (pending & DW_MCI_DATA_ERROR_FLAGS) { 1624f95f3850SWill Newton /* if there is an error report DATA_ERROR */ 1625f95f3850SWill Newton mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); 1626182c9081SSeungwon Jeon host->data_status = pending; 1627f95f3850SWill Newton smp_wmb(); 1628f95f3850SWill Newton set_bit(EVENT_DATA_ERROR, &host->pending_events); 1629f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1630f95f3850SWill Newton } 1631f95f3850SWill Newton 1632f95f3850SWill Newton if (pending & SDMMC_INT_DATA_OVER) { 1633f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); 1634f95f3850SWill Newton if (!host->data_status) 1635182c9081SSeungwon Jeon host->data_status = pending; 1636f95f3850SWill Newton smp_wmb(); 1637f95f3850SWill Newton if (host->dir_status == DW_MCI_RECV_STATUS) { 1638f95f3850SWill Newton if (host->sg != NULL) 163987a74d39SKyoungil Kim dw_mci_read_data_pio(host, true); 1640f95f3850SWill Newton } 1641f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->pending_events); 1642f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1643f95f3850SWill Newton } 1644f95f3850SWill Newton 1645f95f3850SWill Newton if (pending & SDMMC_INT_RXDR) { 1646f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_RXDR); 1647b40af3aaSJames Hogan if (host->dir_status == DW_MCI_RECV_STATUS && host->sg) 164887a74d39SKyoungil Kim dw_mci_read_data_pio(host, false); 1649f95f3850SWill Newton } 1650f95f3850SWill Newton 1651f95f3850SWill Newton if (pending & SDMMC_INT_TXDR) { 1652f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_TXDR); 1653b40af3aaSJames Hogan if (host->dir_status == DW_MCI_SEND_STATUS && host->sg) 1654f95f3850SWill Newton dw_mci_write_data_pio(host); 1655f95f3850SWill Newton } 1656f95f3850SWill Newton 1657f95f3850SWill Newton if (pending & SDMMC_INT_CMD_DONE) { 1658f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); 1659182c9081SSeungwon Jeon dw_mci_cmd_interrupt(host, pending); 1660f95f3850SWill Newton } 1661f95f3850SWill Newton 1662f95f3850SWill Newton if (pending & SDMMC_INT_CD) { 1663f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_CD); 166495dcc2cbSThomas Abraham queue_work(host->card_workqueue, &host->card_work); 1665f95f3850SWill Newton } 1666f95f3850SWill Newton 16671a5c8e1fSShashidhar Hiremath /* Handle SDIO Interrupts */ 16681a5c8e1fSShashidhar Hiremath for (i = 0; i < host->num_slots; i++) { 16691a5c8e1fSShashidhar Hiremath struct dw_mci_slot *slot = host->slot[i]; 16701a5c8e1fSShashidhar Hiremath if (pending & SDMMC_INT_SDIO(i)) { 16711a5c8e1fSShashidhar Hiremath mci_writel(host, RINTSTS, SDMMC_INT_SDIO(i)); 16721a5c8e1fSShashidhar Hiremath mmc_signal_sdio_irq(slot->mmc); 16731a5c8e1fSShashidhar Hiremath } 16741a5c8e1fSShashidhar Hiremath } 16751a5c8e1fSShashidhar Hiremath 16761fb5f68aSMarkos Chandras } 1677f95f3850SWill Newton 1678f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1679f95f3850SWill Newton /* Handle DMA interrupts */ 1680f95f3850SWill Newton pending = mci_readl(host, IDSTS); 1681f95f3850SWill Newton if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { 1682f95f3850SWill Newton mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI); 1683f95f3850SWill Newton mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); 1684f95f3850SWill Newton host->dma_ops->complete(host); 1685f95f3850SWill Newton } 1686f95f3850SWill Newton #endif 1687f95f3850SWill Newton 1688f95f3850SWill Newton return IRQ_HANDLED; 1689f95f3850SWill Newton } 1690f95f3850SWill Newton 16911791b13eSJames Hogan static void dw_mci_work_routine_card(struct work_struct *work) 1692f95f3850SWill Newton { 16931791b13eSJames Hogan struct dw_mci *host = container_of(work, struct dw_mci, card_work); 1694f95f3850SWill Newton int i; 1695f95f3850SWill Newton 1696f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 1697f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 1698f95f3850SWill Newton struct mmc_host *mmc = slot->mmc; 1699f95f3850SWill Newton struct mmc_request *mrq; 1700f95f3850SWill Newton int present; 1701f95f3850SWill Newton u32 ctrl; 1702f95f3850SWill Newton 1703f95f3850SWill Newton present = dw_mci_get_cd(mmc); 1704f95f3850SWill Newton while (present != slot->last_detect_state) { 1705f95f3850SWill Newton dev_dbg(&slot->mmc->class_dev, "card %s\n", 1706f95f3850SWill Newton present ? "inserted" : "removed"); 1707f95f3850SWill Newton 17081791b13eSJames Hogan spin_lock_bh(&host->lock); 17091791b13eSJames Hogan 1710f95f3850SWill Newton /* Card change detected */ 1711f95f3850SWill Newton slot->last_detect_state = present; 1712f95f3850SWill Newton 17131791b13eSJames Hogan /* Mark card as present if applicable */ 17141791b13eSJames Hogan if (present != 0) 1715f95f3850SWill Newton set_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1716f95f3850SWill Newton 1717f95f3850SWill Newton /* Clean up queue if present */ 1718f95f3850SWill Newton mrq = slot->mrq; 1719f95f3850SWill Newton if (mrq) { 1720f95f3850SWill Newton if (mrq == host->mrq) { 1721f95f3850SWill Newton host->data = NULL; 1722f95f3850SWill Newton host->cmd = NULL; 1723f95f3850SWill Newton 1724f95f3850SWill Newton switch (host->state) { 1725f95f3850SWill Newton case STATE_IDLE: 1726f95f3850SWill Newton break; 1727f95f3850SWill Newton case STATE_SENDING_CMD: 1728f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 1729f95f3850SWill Newton if (!mrq->data) 1730f95f3850SWill Newton break; 1731f95f3850SWill Newton /* fall through */ 1732f95f3850SWill Newton case STATE_SENDING_DATA: 1733f95f3850SWill Newton mrq->data->error = -ENOMEDIUM; 1734f95f3850SWill Newton dw_mci_stop_dma(host); 1735f95f3850SWill Newton break; 1736f95f3850SWill Newton case STATE_DATA_BUSY: 1737f95f3850SWill Newton case STATE_DATA_ERROR: 1738f95f3850SWill Newton if (mrq->data->error == -EINPROGRESS) 1739f95f3850SWill Newton mrq->data->error = -ENOMEDIUM; 1740f95f3850SWill Newton if (!mrq->stop) 1741f95f3850SWill Newton break; 1742f95f3850SWill Newton /* fall through */ 1743f95f3850SWill Newton case STATE_SENDING_STOP: 1744f95f3850SWill Newton mrq->stop->error = -ENOMEDIUM; 1745f95f3850SWill Newton break; 1746f95f3850SWill Newton } 1747f95f3850SWill Newton 1748f95f3850SWill Newton dw_mci_request_end(host, mrq); 1749f95f3850SWill Newton } else { 1750f95f3850SWill Newton list_del(&slot->queue_node); 1751f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 1752f95f3850SWill Newton if (mrq->data) 1753f95f3850SWill Newton mrq->data->error = -ENOMEDIUM; 1754f95f3850SWill Newton if (mrq->stop) 1755f95f3850SWill Newton mrq->stop->error = -ENOMEDIUM; 1756f95f3850SWill Newton 1757f95f3850SWill Newton spin_unlock(&host->lock); 1758f95f3850SWill Newton mmc_request_done(slot->mmc, mrq); 1759f95f3850SWill Newton spin_lock(&host->lock); 1760f95f3850SWill Newton } 1761f95f3850SWill Newton } 1762f95f3850SWill Newton 1763f95f3850SWill Newton /* Power down slot */ 1764f95f3850SWill Newton if (present == 0) { 1765f95f3850SWill Newton clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1766f95f3850SWill Newton 1767f95f3850SWill Newton /* 1768f95f3850SWill Newton * Clear down the FIFO - doing so generates a 1769f95f3850SWill Newton * block interrupt, hence setting the 1770f95f3850SWill Newton * scatter-gather pointer to NULL. 1771f95f3850SWill Newton */ 1772f9c2a0dcSSeungwon Jeon sg_miter_stop(&host->sg_miter); 1773f95f3850SWill Newton host->sg = NULL; 1774f95f3850SWill Newton 1775f95f3850SWill Newton ctrl = mci_readl(host, CTRL); 1776f95f3850SWill Newton ctrl |= SDMMC_CTRL_FIFO_RESET; 1777f95f3850SWill Newton mci_writel(host, CTRL, ctrl); 1778f95f3850SWill Newton 1779f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1780f95f3850SWill Newton ctrl = mci_readl(host, BMOD); 1781141a712aSSeungwon Jeon /* Software reset of DMA */ 1782141a712aSSeungwon Jeon ctrl |= SDMMC_IDMAC_SWRESET; 1783f95f3850SWill Newton mci_writel(host, BMOD, ctrl); 1784f95f3850SWill Newton #endif 1785f95f3850SWill Newton 1786f95f3850SWill Newton } 1787f95f3850SWill Newton 17881791b13eSJames Hogan spin_unlock_bh(&host->lock); 17891791b13eSJames Hogan 1790f95f3850SWill Newton present = dw_mci_get_cd(mmc); 1791f95f3850SWill Newton } 1792f95f3850SWill Newton 1793f95f3850SWill Newton mmc_detect_change(slot->mmc, 1794f95f3850SWill Newton msecs_to_jiffies(host->pdata->detect_delay_ms)); 1795f95f3850SWill Newton } 1796f95f3850SWill Newton } 1797f95f3850SWill Newton 1798c91eab4bSThomas Abraham #ifdef CONFIG_OF 1799c91eab4bSThomas Abraham /* given a slot id, find out the device node representing that slot */ 1800c91eab4bSThomas Abraham static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot) 1801c91eab4bSThomas Abraham { 1802c91eab4bSThomas Abraham struct device_node *np; 1803c91eab4bSThomas Abraham const __be32 *addr; 1804c91eab4bSThomas Abraham int len; 1805c91eab4bSThomas Abraham 1806c91eab4bSThomas Abraham if (!dev || !dev->of_node) 1807c91eab4bSThomas Abraham return NULL; 1808c91eab4bSThomas Abraham 1809c91eab4bSThomas Abraham for_each_child_of_node(dev->of_node, np) { 1810c91eab4bSThomas Abraham addr = of_get_property(np, "reg", &len); 1811c91eab4bSThomas Abraham if (!addr || (len < sizeof(int))) 1812c91eab4bSThomas Abraham continue; 1813c91eab4bSThomas Abraham if (be32_to_cpup(addr) == slot) 1814c91eab4bSThomas Abraham return np; 1815c91eab4bSThomas Abraham } 1816c91eab4bSThomas Abraham return NULL; 1817c91eab4bSThomas Abraham } 1818c91eab4bSThomas Abraham 1819a70aaa64SDoug Anderson static struct dw_mci_of_slot_quirks { 1820a70aaa64SDoug Anderson char *quirk; 1821a70aaa64SDoug Anderson int id; 1822a70aaa64SDoug Anderson } of_slot_quirks[] = { 1823a70aaa64SDoug Anderson { 1824a70aaa64SDoug Anderson .quirk = "disable-wp", 1825a70aaa64SDoug Anderson .id = DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT, 1826a70aaa64SDoug Anderson }, 1827a70aaa64SDoug Anderson }; 1828a70aaa64SDoug Anderson 1829a70aaa64SDoug Anderson static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot) 1830a70aaa64SDoug Anderson { 1831a70aaa64SDoug Anderson struct device_node *np = dw_mci_of_find_slot_node(dev, slot); 1832a70aaa64SDoug Anderson int quirks = 0; 1833a70aaa64SDoug Anderson int idx; 1834a70aaa64SDoug Anderson 1835a70aaa64SDoug Anderson /* get quirks */ 1836a70aaa64SDoug Anderson for (idx = 0; idx < ARRAY_SIZE(of_slot_quirks); idx++) 1837a70aaa64SDoug Anderson if (of_get_property(np, of_slot_quirks[idx].quirk, NULL)) 1838a70aaa64SDoug Anderson quirks |= of_slot_quirks[idx].id; 1839a70aaa64SDoug Anderson 1840a70aaa64SDoug Anderson return quirks; 1841a70aaa64SDoug Anderson } 1842a70aaa64SDoug Anderson 1843c91eab4bSThomas Abraham /* find out bus-width for a given slot */ 1844c91eab4bSThomas Abraham static u32 dw_mci_of_get_bus_wd(struct device *dev, u8 slot) 1845c91eab4bSThomas Abraham { 1846c91eab4bSThomas Abraham struct device_node *np = dw_mci_of_find_slot_node(dev, slot); 1847c91eab4bSThomas Abraham u32 bus_wd = 1; 1848c91eab4bSThomas Abraham 1849c91eab4bSThomas Abraham if (!np) 1850c91eab4bSThomas Abraham return 1; 1851c91eab4bSThomas Abraham 1852c91eab4bSThomas Abraham if (of_property_read_u32(np, "bus-width", &bus_wd)) 1853c91eab4bSThomas Abraham dev_err(dev, "bus-width property not found, assuming width" 1854c91eab4bSThomas Abraham " as 1\n"); 1855c91eab4bSThomas Abraham return bus_wd; 1856c91eab4bSThomas Abraham } 185755a6ceb2SDoug Anderson 185855a6ceb2SDoug Anderson /* find the write protect gpio for a given slot; or -1 if none specified */ 185955a6ceb2SDoug Anderson static int dw_mci_of_get_wp_gpio(struct device *dev, u8 slot) 186055a6ceb2SDoug Anderson { 186155a6ceb2SDoug Anderson struct device_node *np = dw_mci_of_find_slot_node(dev, slot); 186255a6ceb2SDoug Anderson int gpio; 186355a6ceb2SDoug Anderson 186455a6ceb2SDoug Anderson if (!np) 186555a6ceb2SDoug Anderson return -EINVAL; 186655a6ceb2SDoug Anderson 186755a6ceb2SDoug Anderson gpio = of_get_named_gpio(np, "wp-gpios", 0); 186855a6ceb2SDoug Anderson 186955a6ceb2SDoug Anderson /* Having a missing entry is valid; return silently */ 187055a6ceb2SDoug Anderson if (!gpio_is_valid(gpio)) 187155a6ceb2SDoug Anderson return -EINVAL; 187255a6ceb2SDoug Anderson 187355a6ceb2SDoug Anderson if (devm_gpio_request(dev, gpio, "dw-mci-wp")) { 187455a6ceb2SDoug Anderson dev_warn(dev, "gpio [%d] request failed\n", gpio); 187555a6ceb2SDoug Anderson return -EINVAL; 187655a6ceb2SDoug Anderson } 187755a6ceb2SDoug Anderson 187855a6ceb2SDoug Anderson return gpio; 187955a6ceb2SDoug Anderson } 1880c91eab4bSThomas Abraham #else /* CONFIG_OF */ 1881a70aaa64SDoug Anderson static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot) 1882a70aaa64SDoug Anderson { 1883a70aaa64SDoug Anderson return 0; 1884a70aaa64SDoug Anderson } 1885c91eab4bSThomas Abraham static u32 dw_mci_of_get_bus_wd(struct device *dev, u8 slot) 1886c91eab4bSThomas Abraham { 1887c91eab4bSThomas Abraham return 1; 1888c91eab4bSThomas Abraham } 1889c91eab4bSThomas Abraham static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot) 1890c91eab4bSThomas Abraham { 1891c91eab4bSThomas Abraham return NULL; 1892c91eab4bSThomas Abraham } 189355a6ceb2SDoug Anderson static int dw_mci_of_get_wp_gpio(struct device *dev, u8 slot) 189455a6ceb2SDoug Anderson { 189555a6ceb2SDoug Anderson return -EINVAL; 189655a6ceb2SDoug Anderson } 1897c91eab4bSThomas Abraham #endif /* CONFIG_OF */ 1898c91eab4bSThomas Abraham 189936c179a9SJaehoon Chung static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) 1900f95f3850SWill Newton { 1901f95f3850SWill Newton struct mmc_host *mmc; 1902f95f3850SWill Newton struct dw_mci_slot *slot; 1903e95baf13SArnd Bergmann const struct dw_mci_drv_data *drv_data = host->drv_data; 1904800d78bfSThomas Abraham int ctrl_id, ret; 1905c91eab4bSThomas Abraham u8 bus_width; 1906f95f3850SWill Newton 19074a90920cSThomas Abraham mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev); 1908f95f3850SWill Newton if (!mmc) 1909f95f3850SWill Newton return -ENOMEM; 1910f95f3850SWill Newton 1911f95f3850SWill Newton slot = mmc_priv(mmc); 1912f95f3850SWill Newton slot->id = id; 1913f95f3850SWill Newton slot->mmc = mmc; 1914f95f3850SWill Newton slot->host = host; 1915c91eab4bSThomas Abraham host->slot[id] = slot; 1916f95f3850SWill Newton 1917a70aaa64SDoug Anderson slot->quirks = dw_mci_of_get_slot_quirks(host->dev, slot->id); 1918a70aaa64SDoug Anderson 1919f95f3850SWill Newton mmc->ops = &dw_mci_ops; 1920f95f3850SWill Newton mmc->f_min = DIV_ROUND_UP(host->bus_hz, 510); 1921f95f3850SWill Newton mmc->f_max = host->bus_hz; 1922f95f3850SWill Newton 1923f95f3850SWill Newton if (host->pdata->get_ocr) 1924f95f3850SWill Newton mmc->ocr_avail = host->pdata->get_ocr(id); 1925f95f3850SWill Newton else 1926f95f3850SWill Newton mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1927f95f3850SWill Newton 1928f95f3850SWill Newton /* 1929f95f3850SWill Newton * Start with slot power disabled, it will be enabled when a card 1930f95f3850SWill Newton * is detected. 1931f95f3850SWill Newton */ 1932f95f3850SWill Newton if (host->pdata->setpower) 1933f95f3850SWill Newton host->pdata->setpower(id, 0); 1934f95f3850SWill Newton 1935fc3d7720SJaehoon Chung if (host->pdata->caps) 1936fc3d7720SJaehoon Chung mmc->caps = host->pdata->caps; 1937fc3d7720SJaehoon Chung 1938ab269128SAbhilash Kesavan if (host->pdata->pm_caps) 1939ab269128SAbhilash Kesavan mmc->pm_caps = host->pdata->pm_caps; 1940ab269128SAbhilash Kesavan 1941800d78bfSThomas Abraham if (host->dev->of_node) { 1942800d78bfSThomas Abraham ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); 1943800d78bfSThomas Abraham if (ctrl_id < 0) 1944800d78bfSThomas Abraham ctrl_id = 0; 1945800d78bfSThomas Abraham } else { 1946800d78bfSThomas Abraham ctrl_id = to_platform_device(host->dev)->id; 1947800d78bfSThomas Abraham } 1948cb27a843SJames Hogan if (drv_data && drv_data->caps) 1949cb27a843SJames Hogan mmc->caps |= drv_data->caps[ctrl_id]; 1950800d78bfSThomas Abraham 19514f408cc6SSeungwon Jeon if (host->pdata->caps2) 19524f408cc6SSeungwon Jeon mmc->caps2 = host->pdata->caps2; 19534f408cc6SSeungwon Jeon 1954f95f3850SWill Newton if (host->pdata->get_bus_wd) 1955c91eab4bSThomas Abraham bus_width = host->pdata->get_bus_wd(slot->id); 1956c91eab4bSThomas Abraham else if (host->dev->of_node) 1957c91eab4bSThomas Abraham bus_width = dw_mci_of_get_bus_wd(host->dev, slot->id); 1958c91eab4bSThomas Abraham else 1959c91eab4bSThomas Abraham bus_width = 1; 1960c91eab4bSThomas Abraham 1961c91eab4bSThomas Abraham switch (bus_width) { 1962c91eab4bSThomas Abraham case 8: 1963c91eab4bSThomas Abraham mmc->caps |= MMC_CAP_8_BIT_DATA; 1964c91eab4bSThomas Abraham case 4: 1965f95f3850SWill Newton mmc->caps |= MMC_CAP_4_BIT_DATA; 1966c91eab4bSThomas Abraham } 1967f95f3850SWill Newton 1968f95f3850SWill Newton if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED) 19696daa7778SSeungwon Jeon mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; 1970f95f3850SWill Newton 1971f95f3850SWill Newton if (host->pdata->blk_settings) { 1972f95f3850SWill Newton mmc->max_segs = host->pdata->blk_settings->max_segs; 1973f95f3850SWill Newton mmc->max_blk_size = host->pdata->blk_settings->max_blk_size; 1974f95f3850SWill Newton mmc->max_blk_count = host->pdata->blk_settings->max_blk_count; 1975f95f3850SWill Newton mmc->max_req_size = host->pdata->blk_settings->max_req_size; 1976f95f3850SWill Newton mmc->max_seg_size = host->pdata->blk_settings->max_seg_size; 1977f95f3850SWill Newton } else { 1978f95f3850SWill Newton /* Useful defaults if platform data is unset. */ 1979a39e5746SJaehoon Chung #ifdef CONFIG_MMC_DW_IDMAC 1980a39e5746SJaehoon Chung mmc->max_segs = host->ring_size; 1981a39e5746SJaehoon Chung mmc->max_blk_size = 65536; 1982a39e5746SJaehoon Chung mmc->max_blk_count = host->ring_size; 1983a39e5746SJaehoon Chung mmc->max_seg_size = 0x1000; 1984a39e5746SJaehoon Chung mmc->max_req_size = mmc->max_seg_size * mmc->max_blk_count; 1985a39e5746SJaehoon Chung #else 1986f95f3850SWill Newton mmc->max_segs = 64; 1987f95f3850SWill Newton mmc->max_blk_size = 65536; /* BLKSIZ is 16 bits */ 1988f95f3850SWill Newton mmc->max_blk_count = 512; 1989f95f3850SWill Newton mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 1990f95f3850SWill Newton mmc->max_seg_size = mmc->max_req_size; 1991f95f3850SWill Newton #endif /* CONFIG_MMC_DW_IDMAC */ 1992a39e5746SJaehoon Chung } 1993f95f3850SWill Newton 1994f95f3850SWill Newton if (dw_mci_get_cd(mmc)) 1995f95f3850SWill Newton set_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1996f95f3850SWill Newton else 1997f95f3850SWill Newton clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1998f95f3850SWill Newton 199955a6ceb2SDoug Anderson slot->wp_gpio = dw_mci_of_get_wp_gpio(host->dev, slot->id); 200055a6ceb2SDoug Anderson 20010cea529dSJaehoon Chung ret = mmc_add_host(mmc); 20020cea529dSJaehoon Chung if (ret) 20030cea529dSJaehoon Chung goto err_setup_bus; 2004f95f3850SWill Newton 2005f95f3850SWill Newton #if defined(CONFIG_DEBUG_FS) 2006f95f3850SWill Newton dw_mci_init_debugfs(slot); 2007f95f3850SWill Newton #endif 2008f95f3850SWill Newton 2009f95f3850SWill Newton /* Card initially undetected */ 2010f95f3850SWill Newton slot->last_detect_state = 0; 2011f95f3850SWill Newton 2012dd6c4b98SWill Newton /* 2013dd6c4b98SWill Newton * Card may have been plugged in prior to boot so we 2014dd6c4b98SWill Newton * need to run the detect tasklet 2015dd6c4b98SWill Newton */ 201695dcc2cbSThomas Abraham queue_work(host->card_workqueue, &host->card_work); 2017dd6c4b98SWill Newton 2018f95f3850SWill Newton return 0; 2019800d78bfSThomas Abraham 2020800d78bfSThomas Abraham err_setup_bus: 2021800d78bfSThomas Abraham mmc_free_host(mmc); 2022800d78bfSThomas Abraham return -EINVAL; 2023f95f3850SWill Newton } 2024f95f3850SWill Newton 2025f95f3850SWill Newton static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) 2026f95f3850SWill Newton { 2027f95f3850SWill Newton /* Shutdown detect IRQ */ 2028f95f3850SWill Newton if (slot->host->pdata->exit) 2029f95f3850SWill Newton slot->host->pdata->exit(id); 2030f95f3850SWill Newton 2031f95f3850SWill Newton /* Debugfs stuff is cleaned up by mmc core */ 2032f95f3850SWill Newton mmc_remove_host(slot->mmc); 2033f95f3850SWill Newton slot->host->slot[id] = NULL; 2034f95f3850SWill Newton mmc_free_host(slot->mmc); 2035f95f3850SWill Newton } 2036f95f3850SWill Newton 2037f95f3850SWill Newton static void dw_mci_init_dma(struct dw_mci *host) 2038f95f3850SWill Newton { 2039f95f3850SWill Newton /* Alloc memory for sg translation */ 2040780f22afSSeungwon Jeon host->sg_cpu = dmam_alloc_coherent(host->dev, PAGE_SIZE, 2041f95f3850SWill Newton &host->sg_dma, GFP_KERNEL); 2042f95f3850SWill Newton if (!host->sg_cpu) { 20434a90920cSThomas Abraham dev_err(host->dev, "%s: could not alloc DMA memory\n", 2044f95f3850SWill Newton __func__); 2045f95f3850SWill Newton goto no_dma; 2046f95f3850SWill Newton } 2047f95f3850SWill Newton 2048f95f3850SWill Newton /* Determine which DMA interface to use */ 2049f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 2050f95f3850SWill Newton host->dma_ops = &dw_mci_idmac_ops; 205100956ea3SSeungwon Jeon dev_info(host->dev, "Using internal DMA controller.\n"); 2052f95f3850SWill Newton #endif 2053f95f3850SWill Newton 2054f95f3850SWill Newton if (!host->dma_ops) 2055f95f3850SWill Newton goto no_dma; 2056f95f3850SWill Newton 2057e1631f98SJaehoon Chung if (host->dma_ops->init && host->dma_ops->start && 2058e1631f98SJaehoon Chung host->dma_ops->stop && host->dma_ops->cleanup) { 2059f95f3850SWill Newton if (host->dma_ops->init(host)) { 20604a90920cSThomas Abraham dev_err(host->dev, "%s: Unable to initialize " 2061f95f3850SWill Newton "DMA Controller.\n", __func__); 2062f95f3850SWill Newton goto no_dma; 2063f95f3850SWill Newton } 2064f95f3850SWill Newton } else { 20654a90920cSThomas Abraham dev_err(host->dev, "DMA initialization not found.\n"); 2066f95f3850SWill Newton goto no_dma; 2067f95f3850SWill Newton } 2068f95f3850SWill Newton 2069f95f3850SWill Newton host->use_dma = 1; 2070f95f3850SWill Newton return; 2071f95f3850SWill Newton 2072f95f3850SWill Newton no_dma: 20734a90920cSThomas Abraham dev_info(host->dev, "Using PIO mode.\n"); 2074f95f3850SWill Newton host->use_dma = 0; 2075f95f3850SWill Newton return; 2076f95f3850SWill Newton } 2077f95f3850SWill Newton 2078f95f3850SWill Newton static bool mci_wait_reset(struct device *dev, struct dw_mci *host) 2079f95f3850SWill Newton { 2080f95f3850SWill Newton unsigned long timeout = jiffies + msecs_to_jiffies(500); 2081f95f3850SWill Newton unsigned int ctrl; 2082f95f3850SWill Newton 2083f95f3850SWill Newton mci_writel(host, CTRL, (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | 2084f95f3850SWill Newton SDMMC_CTRL_DMA_RESET)); 2085f95f3850SWill Newton 2086f95f3850SWill Newton /* wait till resets clear */ 2087f95f3850SWill Newton do { 2088f95f3850SWill Newton ctrl = mci_readl(host, CTRL); 2089f95f3850SWill Newton if (!(ctrl & (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | 2090f95f3850SWill Newton SDMMC_CTRL_DMA_RESET))) 2091f95f3850SWill Newton return true; 2092f95f3850SWill Newton } while (time_before(jiffies, timeout)); 2093f95f3850SWill Newton 2094f95f3850SWill Newton dev_err(dev, "Timeout resetting block (ctrl %#x)\n", ctrl); 2095f95f3850SWill Newton 2096f95f3850SWill Newton return false; 2097f95f3850SWill Newton } 2098f95f3850SWill Newton 2099c91eab4bSThomas Abraham #ifdef CONFIG_OF 2100c91eab4bSThomas Abraham static struct dw_mci_of_quirks { 2101c91eab4bSThomas Abraham char *quirk; 2102c91eab4bSThomas Abraham int id; 2103c91eab4bSThomas Abraham } of_quirks[] = { 2104c91eab4bSThomas Abraham { 2105c91eab4bSThomas Abraham .quirk = "supports-highspeed", 2106c91eab4bSThomas Abraham .id = DW_MCI_QUIRK_HIGHSPEED, 2107c91eab4bSThomas Abraham }, { 2108c91eab4bSThomas Abraham .quirk = "broken-cd", 2109c91eab4bSThomas Abraham .id = DW_MCI_QUIRK_BROKEN_CARD_DETECTION, 2110c91eab4bSThomas Abraham }, 2111c91eab4bSThomas Abraham }; 2112c91eab4bSThomas Abraham 2113c91eab4bSThomas Abraham static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) 2114c91eab4bSThomas Abraham { 2115c91eab4bSThomas Abraham struct dw_mci_board *pdata; 2116c91eab4bSThomas Abraham struct device *dev = host->dev; 2117c91eab4bSThomas Abraham struct device_node *np = dev->of_node; 2118e95baf13SArnd Bergmann const struct dw_mci_drv_data *drv_data = host->drv_data; 2119800d78bfSThomas Abraham int idx, ret; 2120*3c6d89eaSDoug Anderson u32 clock_frequency; 2121c91eab4bSThomas Abraham 2122c91eab4bSThomas Abraham pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 2123c91eab4bSThomas Abraham if (!pdata) { 2124c91eab4bSThomas Abraham dev_err(dev, "could not allocate memory for pdata\n"); 2125c91eab4bSThomas Abraham return ERR_PTR(-ENOMEM); 2126c91eab4bSThomas Abraham } 2127c91eab4bSThomas Abraham 2128c91eab4bSThomas Abraham /* find out number of slots supported */ 2129c91eab4bSThomas Abraham if (of_property_read_u32(dev->of_node, "num-slots", 2130c91eab4bSThomas Abraham &pdata->num_slots)) { 2131c91eab4bSThomas Abraham dev_info(dev, "num-slots property not found, " 2132c91eab4bSThomas Abraham "assuming 1 slot is available\n"); 2133c91eab4bSThomas Abraham pdata->num_slots = 1; 2134c91eab4bSThomas Abraham } 2135c91eab4bSThomas Abraham 2136c91eab4bSThomas Abraham /* get quirks */ 2137c91eab4bSThomas Abraham for (idx = 0; idx < ARRAY_SIZE(of_quirks); idx++) 2138c91eab4bSThomas Abraham if (of_get_property(np, of_quirks[idx].quirk, NULL)) 2139c91eab4bSThomas Abraham pdata->quirks |= of_quirks[idx].id; 2140c91eab4bSThomas Abraham 2141c91eab4bSThomas Abraham if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth)) 2142c91eab4bSThomas Abraham dev_info(dev, "fifo-depth property not found, using " 2143c91eab4bSThomas Abraham "value of FIFOTH register as default\n"); 2144c91eab4bSThomas Abraham 2145c91eab4bSThomas Abraham of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms); 2146c91eab4bSThomas Abraham 2147*3c6d89eaSDoug Anderson if (!of_property_read_u32(np, "clock-frequency", &clock_frequency)) 2148*3c6d89eaSDoug Anderson pdata->bus_hz = clock_frequency; 2149*3c6d89eaSDoug Anderson 2150cb27a843SJames Hogan if (drv_data && drv_data->parse_dt) { 2151cb27a843SJames Hogan ret = drv_data->parse_dt(host); 2152800d78bfSThomas Abraham if (ret) 2153800d78bfSThomas Abraham return ERR_PTR(ret); 2154800d78bfSThomas Abraham } 2155800d78bfSThomas Abraham 2156ab269128SAbhilash Kesavan if (of_find_property(np, "keep-power-in-suspend", NULL)) 2157ab269128SAbhilash Kesavan pdata->pm_caps |= MMC_PM_KEEP_POWER; 2158ab269128SAbhilash Kesavan 2159ab269128SAbhilash Kesavan if (of_find_property(np, "enable-sdio-wakeup", NULL)) 2160ab269128SAbhilash Kesavan pdata->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; 2161ab269128SAbhilash Kesavan 2162c91eab4bSThomas Abraham return pdata; 2163c91eab4bSThomas Abraham } 2164c91eab4bSThomas Abraham 2165c91eab4bSThomas Abraham #else /* CONFIG_OF */ 2166c91eab4bSThomas Abraham static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) 2167c91eab4bSThomas Abraham { 2168c91eab4bSThomas Abraham return ERR_PTR(-EINVAL); 2169c91eab4bSThomas Abraham } 2170c91eab4bSThomas Abraham #endif /* CONFIG_OF */ 2171c91eab4bSThomas Abraham 217262ca8034SShashidhar Hiremath int dw_mci_probe(struct dw_mci *host) 2173f95f3850SWill Newton { 2174e95baf13SArnd Bergmann const struct dw_mci_drv_data *drv_data = host->drv_data; 217562ca8034SShashidhar Hiremath int width, i, ret = 0; 2176f95f3850SWill Newton u32 fifo_size; 21771c2215b7SThomas Abraham int init_slots = 0; 2178f95f3850SWill Newton 2179c91eab4bSThomas Abraham if (!host->pdata) { 2180c91eab4bSThomas Abraham host->pdata = dw_mci_parse_dt(host); 2181c91eab4bSThomas Abraham if (IS_ERR(host->pdata)) { 2182c91eab4bSThomas Abraham dev_err(host->dev, "platform data not available\n"); 2183c91eab4bSThomas Abraham return -EINVAL; 2184c91eab4bSThomas Abraham } 2185f95f3850SWill Newton } 2186f95f3850SWill Newton 218762ca8034SShashidhar Hiremath if (!host->pdata->select_slot && host->pdata->num_slots > 1) { 21884a90920cSThomas Abraham dev_err(host->dev, 2189f95f3850SWill Newton "Platform data must supply select_slot function\n"); 219062ca8034SShashidhar Hiremath return -ENODEV; 2191f95f3850SWill Newton } 2192f95f3850SWill Newton 2193780f22afSSeungwon Jeon host->biu_clk = devm_clk_get(host->dev, "biu"); 2194f90a0612SThomas Abraham if (IS_ERR(host->biu_clk)) { 2195f90a0612SThomas Abraham dev_dbg(host->dev, "biu clock not available\n"); 2196f90a0612SThomas Abraham } else { 2197f90a0612SThomas Abraham ret = clk_prepare_enable(host->biu_clk); 2198f90a0612SThomas Abraham if (ret) { 2199f90a0612SThomas Abraham dev_err(host->dev, "failed to enable biu clock\n"); 2200f90a0612SThomas Abraham return ret; 2201f90a0612SThomas Abraham } 2202f95f3850SWill Newton } 2203f95f3850SWill Newton 2204780f22afSSeungwon Jeon host->ciu_clk = devm_clk_get(host->dev, "ciu"); 2205f90a0612SThomas Abraham if (IS_ERR(host->ciu_clk)) { 2206f90a0612SThomas Abraham dev_dbg(host->dev, "ciu clock not available\n"); 2207*3c6d89eaSDoug Anderson host->bus_hz = host->pdata->bus_hz; 2208f90a0612SThomas Abraham } else { 2209f90a0612SThomas Abraham ret = clk_prepare_enable(host->ciu_clk); 2210f90a0612SThomas Abraham if (ret) { 2211f90a0612SThomas Abraham dev_err(host->dev, "failed to enable ciu clock\n"); 2212f90a0612SThomas Abraham goto err_clk_biu; 2213f90a0612SThomas Abraham } 2214f90a0612SThomas Abraham 2215*3c6d89eaSDoug Anderson if (host->pdata->bus_hz) { 2216*3c6d89eaSDoug Anderson ret = clk_set_rate(host->ciu_clk, host->pdata->bus_hz); 2217*3c6d89eaSDoug Anderson if (ret) 2218*3c6d89eaSDoug Anderson dev_warn(host->dev, 2219*3c6d89eaSDoug Anderson "Unable to set bus rate to %ul\n", 2220*3c6d89eaSDoug Anderson host->pdata->bus_hz); 2221*3c6d89eaSDoug Anderson } 2222f90a0612SThomas Abraham host->bus_hz = clk_get_rate(host->ciu_clk); 2223*3c6d89eaSDoug Anderson } 2224f90a0612SThomas Abraham 2225cb27a843SJames Hogan if (drv_data && drv_data->setup_clock) { 2226cb27a843SJames Hogan ret = drv_data->setup_clock(host); 2227800d78bfSThomas Abraham if (ret) { 2228800d78bfSThomas Abraham dev_err(host->dev, 2229800d78bfSThomas Abraham "implementation specific clock setup failed\n"); 2230800d78bfSThomas Abraham goto err_clk_ciu; 2231800d78bfSThomas Abraham } 2232800d78bfSThomas Abraham } 2233800d78bfSThomas Abraham 2234870556a3SDoug Anderson host->vmmc = devm_regulator_get(host->dev, "vmmc"); 2235870556a3SDoug Anderson if (IS_ERR(host->vmmc)) { 2236870556a3SDoug Anderson ret = PTR_ERR(host->vmmc); 2237870556a3SDoug Anderson if (ret == -EPROBE_DEFER) 2238870556a3SDoug Anderson goto err_clk_ciu; 2239870556a3SDoug Anderson 2240870556a3SDoug Anderson dev_info(host->dev, "no vmmc regulator found: %d\n", ret); 2241870556a3SDoug Anderson host->vmmc = NULL; 2242870556a3SDoug Anderson } else { 2243870556a3SDoug Anderson ret = regulator_enable(host->vmmc); 2244870556a3SDoug Anderson if (ret) { 2245870556a3SDoug Anderson if (ret != -EPROBE_DEFER) 2246870556a3SDoug Anderson dev_err(host->dev, 2247870556a3SDoug Anderson "regulator_enable fail: %d\n", ret); 2248870556a3SDoug Anderson goto err_clk_ciu; 2249870556a3SDoug Anderson } 2250870556a3SDoug Anderson } 2251870556a3SDoug Anderson 2252f90a0612SThomas Abraham if (!host->bus_hz) { 2253f90a0612SThomas Abraham dev_err(host->dev, 2254f90a0612SThomas Abraham "Platform data must supply bus speed\n"); 2255f90a0612SThomas Abraham ret = -ENODEV; 2256870556a3SDoug Anderson goto err_regulator; 2257f90a0612SThomas Abraham } 2258f90a0612SThomas Abraham 225962ca8034SShashidhar Hiremath host->quirks = host->pdata->quirks; 2260f95f3850SWill Newton 2261f95f3850SWill Newton spin_lock_init(&host->lock); 2262f95f3850SWill Newton INIT_LIST_HEAD(&host->queue); 2263f95f3850SWill Newton 2264f95f3850SWill Newton /* 2265f95f3850SWill Newton * Get the host data width - this assumes that HCON has been set with 2266f95f3850SWill Newton * the correct values. 2267f95f3850SWill Newton */ 2268f95f3850SWill Newton i = (mci_readl(host, HCON) >> 7) & 0x7; 2269f95f3850SWill Newton if (!i) { 2270f95f3850SWill Newton host->push_data = dw_mci_push_data16; 2271f95f3850SWill Newton host->pull_data = dw_mci_pull_data16; 2272f95f3850SWill Newton width = 16; 2273f95f3850SWill Newton host->data_shift = 1; 2274f95f3850SWill Newton } else if (i == 2) { 2275f95f3850SWill Newton host->push_data = dw_mci_push_data64; 2276f95f3850SWill Newton host->pull_data = dw_mci_pull_data64; 2277f95f3850SWill Newton width = 64; 2278f95f3850SWill Newton host->data_shift = 3; 2279f95f3850SWill Newton } else { 2280f95f3850SWill Newton /* Check for a reserved value, and warn if it is */ 2281f95f3850SWill Newton WARN((i != 1), 2282f95f3850SWill Newton "HCON reports a reserved host data width!\n" 2283f95f3850SWill Newton "Defaulting to 32-bit access.\n"); 2284f95f3850SWill Newton host->push_data = dw_mci_push_data32; 2285f95f3850SWill Newton host->pull_data = dw_mci_pull_data32; 2286f95f3850SWill Newton width = 32; 2287f95f3850SWill Newton host->data_shift = 2; 2288f95f3850SWill Newton } 2289f95f3850SWill Newton 2290f95f3850SWill Newton /* Reset all blocks */ 22914a90920cSThomas Abraham if (!mci_wait_reset(host->dev, host)) 2292141a712aSSeungwon Jeon return -ENODEV; 2293141a712aSSeungwon Jeon 2294141a712aSSeungwon Jeon host->dma_ops = host->pdata->dma_ops; 2295141a712aSSeungwon Jeon dw_mci_init_dma(host); 2296f95f3850SWill Newton 2297f95f3850SWill Newton /* Clear the interrupts for the host controller */ 2298f95f3850SWill Newton mci_writel(host, RINTSTS, 0xFFFFFFFF); 2299f95f3850SWill Newton mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ 2300f95f3850SWill Newton 2301f95f3850SWill Newton /* Put in max timeout */ 2302f95f3850SWill Newton mci_writel(host, TMOUT, 0xFFFFFFFF); 2303f95f3850SWill Newton 2304f95f3850SWill Newton /* 2305f95f3850SWill Newton * FIFO threshold settings RxMark = fifo_size / 2 - 1, 2306f95f3850SWill Newton * Tx Mark = fifo_size / 2 DMA Size = 8 2307f95f3850SWill Newton */ 2308b86d8253SJames Hogan if (!host->pdata->fifo_depth) { 2309b86d8253SJames Hogan /* 2310b86d8253SJames Hogan * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may 2311b86d8253SJames Hogan * have been overwritten by the bootloader, just like we're 2312b86d8253SJames Hogan * about to do, so if you know the value for your hardware, you 2313b86d8253SJames Hogan * should put it in the platform data. 2314b86d8253SJames Hogan */ 2315f95f3850SWill Newton fifo_size = mci_readl(host, FIFOTH); 23168234e869SJaehoon Chung fifo_size = 1 + ((fifo_size >> 16) & 0xfff); 2317b86d8253SJames Hogan } else { 2318b86d8253SJames Hogan fifo_size = host->pdata->fifo_depth; 2319b86d8253SJames Hogan } 2320b86d8253SJames Hogan host->fifo_depth = fifo_size; 2321e61cf118SJaehoon Chung host->fifoth_val = ((0x2 << 28) | ((fifo_size/2 - 1) << 16) | 2322e61cf118SJaehoon Chung ((fifo_size/2) << 0)); 2323e61cf118SJaehoon Chung mci_writel(host, FIFOTH, host->fifoth_val); 2324f95f3850SWill Newton 2325f95f3850SWill Newton /* disable clock to CIU */ 2326f95f3850SWill Newton mci_writel(host, CLKENA, 0); 2327f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 2328f95f3850SWill Newton 232963008768SJames Hogan /* 233063008768SJames Hogan * In 2.40a spec, Data offset is changed. 233163008768SJames Hogan * Need to check the version-id and set data-offset for DATA register. 233263008768SJames Hogan */ 233363008768SJames Hogan host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); 233463008768SJames Hogan dev_info(host->dev, "Version ID is %04x\n", host->verid); 233563008768SJames Hogan 233663008768SJames Hogan if (host->verid < DW_MMC_240A) 233763008768SJames Hogan host->data_offset = DATA_OFFSET; 233863008768SJames Hogan else 233963008768SJames Hogan host->data_offset = DATA_240A_OFFSET; 234063008768SJames Hogan 2341f95f3850SWill Newton tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); 234295dcc2cbSThomas Abraham host->card_workqueue = alloc_workqueue("dw-mci-card", 23431791b13eSJames Hogan WQ_MEM_RECLAIM | WQ_NON_REENTRANT, 1); 2344ef7aef9aSWei Yongjun if (!host->card_workqueue) { 2345ef7aef9aSWei Yongjun ret = -ENOMEM; 23461791b13eSJames Hogan goto err_dmaunmap; 2347ef7aef9aSWei Yongjun } 23481791b13eSJames Hogan INIT_WORK(&host->card_work, dw_mci_work_routine_card); 2349780f22afSSeungwon Jeon ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, 2350780f22afSSeungwon Jeon host->irq_flags, "dw-mci", host); 2351f95f3850SWill Newton if (ret) 23521791b13eSJames Hogan goto err_workqueue; 2353f95f3850SWill Newton 2354f95f3850SWill Newton if (host->pdata->num_slots) 2355f95f3850SWill Newton host->num_slots = host->pdata->num_slots; 2356f95f3850SWill Newton else 2357f95f3850SWill Newton host->num_slots = ((mci_readl(host, HCON) >> 1) & 0x1F) + 1; 2358f95f3850SWill Newton 23592da1d7f2SYuvaraj CD /* 23602da1d7f2SYuvaraj CD * Enable interrupts for command done, data over, data empty, card det, 23612da1d7f2SYuvaraj CD * receive ready and error such as transmit, receive timeout, crc error 23622da1d7f2SYuvaraj CD */ 23632da1d7f2SYuvaraj CD mci_writel(host, RINTSTS, 0xFFFFFFFF); 23642da1d7f2SYuvaraj CD mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | 23652da1d7f2SYuvaraj CD SDMMC_INT_TXDR | SDMMC_INT_RXDR | 23662da1d7f2SYuvaraj CD DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); 23672da1d7f2SYuvaraj CD mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */ 23682da1d7f2SYuvaraj CD 23692da1d7f2SYuvaraj CD dev_info(host->dev, "DW MMC controller at irq %d, " 23702da1d7f2SYuvaraj CD "%d bit host data width, " 23712da1d7f2SYuvaraj CD "%u deep fifo\n", 23722da1d7f2SYuvaraj CD host->irq, width, fifo_size); 23732da1d7f2SYuvaraj CD 2374f95f3850SWill Newton /* We need at least one slot to succeed */ 2375f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 2376f95f3850SWill Newton ret = dw_mci_init_slot(host, i); 23771c2215b7SThomas Abraham if (ret) 23781c2215b7SThomas Abraham dev_dbg(host->dev, "slot %d init failed\n", i); 23791c2215b7SThomas Abraham else 23801c2215b7SThomas Abraham init_slots++; 2381f95f3850SWill Newton } 23821c2215b7SThomas Abraham 23831c2215b7SThomas Abraham if (init_slots) { 23841c2215b7SThomas Abraham dev_info(host->dev, "%d slots initialized\n", init_slots); 23851c2215b7SThomas Abraham } else { 23861c2215b7SThomas Abraham dev_dbg(host->dev, "attempted to initialize %d slots, " 23871c2215b7SThomas Abraham "but failed on all\n", host->num_slots); 2388780f22afSSeungwon Jeon goto err_workqueue; 2389f95f3850SWill Newton } 2390f95f3850SWill Newton 2391f95f3850SWill Newton if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) 23924a90920cSThomas Abraham dev_info(host->dev, "Internal DMAC interrupt fix enabled.\n"); 2393f95f3850SWill Newton 2394f95f3850SWill Newton return 0; 2395f95f3850SWill Newton 23961791b13eSJames Hogan err_workqueue: 239795dcc2cbSThomas Abraham destroy_workqueue(host->card_workqueue); 23981791b13eSJames Hogan 2399f95f3850SWill Newton err_dmaunmap: 2400f95f3850SWill Newton if (host->use_dma && host->dma_ops->exit) 2401f95f3850SWill Newton host->dma_ops->exit(host); 2402f95f3850SWill Newton 2403870556a3SDoug Anderson err_regulator: 2404780f22afSSeungwon Jeon if (host->vmmc) 2405c07946a3SJaehoon Chung regulator_disable(host->vmmc); 2406f90a0612SThomas Abraham 2407f90a0612SThomas Abraham err_clk_ciu: 2408780f22afSSeungwon Jeon if (!IS_ERR(host->ciu_clk)) 2409f90a0612SThomas Abraham clk_disable_unprepare(host->ciu_clk); 2410780f22afSSeungwon Jeon 2411f90a0612SThomas Abraham err_clk_biu: 2412780f22afSSeungwon Jeon if (!IS_ERR(host->biu_clk)) 2413f90a0612SThomas Abraham clk_disable_unprepare(host->biu_clk); 2414780f22afSSeungwon Jeon 2415f95f3850SWill Newton return ret; 2416f95f3850SWill Newton } 241762ca8034SShashidhar Hiremath EXPORT_SYMBOL(dw_mci_probe); 2418f95f3850SWill Newton 241962ca8034SShashidhar Hiremath void dw_mci_remove(struct dw_mci *host) 2420f95f3850SWill Newton { 2421f95f3850SWill Newton int i; 2422f95f3850SWill Newton 2423f95f3850SWill Newton mci_writel(host, RINTSTS, 0xFFFFFFFF); 2424f95f3850SWill Newton mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ 2425f95f3850SWill Newton 2426f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 24274a90920cSThomas Abraham dev_dbg(host->dev, "remove slot %d\n", i); 2428f95f3850SWill Newton if (host->slot[i]) 2429f95f3850SWill Newton dw_mci_cleanup_slot(host->slot[i], i); 2430f95f3850SWill Newton } 2431f95f3850SWill Newton 2432f95f3850SWill Newton /* disable clock to CIU */ 2433f95f3850SWill Newton mci_writel(host, CLKENA, 0); 2434f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 2435f95f3850SWill Newton 243695dcc2cbSThomas Abraham destroy_workqueue(host->card_workqueue); 2437f95f3850SWill Newton 2438f95f3850SWill Newton if (host->use_dma && host->dma_ops->exit) 2439f95f3850SWill Newton host->dma_ops->exit(host); 2440f95f3850SWill Newton 2441780f22afSSeungwon Jeon if (host->vmmc) 2442c07946a3SJaehoon Chung regulator_disable(host->vmmc); 2443c07946a3SJaehoon Chung 2444f90a0612SThomas Abraham if (!IS_ERR(host->ciu_clk)) 2445f90a0612SThomas Abraham clk_disable_unprepare(host->ciu_clk); 2446780f22afSSeungwon Jeon 2447f90a0612SThomas Abraham if (!IS_ERR(host->biu_clk)) 2448f90a0612SThomas Abraham clk_disable_unprepare(host->biu_clk); 2449f95f3850SWill Newton } 245062ca8034SShashidhar Hiremath EXPORT_SYMBOL(dw_mci_remove); 245162ca8034SShashidhar Hiremath 245262ca8034SShashidhar Hiremath 2453f95f3850SWill Newton 24546fe8890dSJaehoon Chung #ifdef CONFIG_PM_SLEEP 2455f95f3850SWill Newton /* 2456f95f3850SWill Newton * TODO: we should probably disable the clock to the card in the suspend path. 2457f95f3850SWill Newton */ 245862ca8034SShashidhar Hiremath int dw_mci_suspend(struct dw_mci *host) 2459f95f3850SWill Newton { 246062ca8034SShashidhar Hiremath int i, ret = 0; 2461f95f3850SWill Newton 2462f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 2463f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 2464f95f3850SWill Newton if (!slot) 2465f95f3850SWill Newton continue; 2466f95f3850SWill Newton ret = mmc_suspend_host(slot->mmc); 2467f95f3850SWill Newton if (ret < 0) { 2468f95f3850SWill Newton while (--i >= 0) { 2469f95f3850SWill Newton slot = host->slot[i]; 2470f95f3850SWill Newton if (slot) 2471f95f3850SWill Newton mmc_resume_host(host->slot[i]->mmc); 2472f95f3850SWill Newton } 2473f95f3850SWill Newton return ret; 2474f95f3850SWill Newton } 2475f95f3850SWill Newton } 2476f95f3850SWill Newton 2477c07946a3SJaehoon Chung if (host->vmmc) 2478c07946a3SJaehoon Chung regulator_disable(host->vmmc); 2479c07946a3SJaehoon Chung 2480f95f3850SWill Newton return 0; 2481f95f3850SWill Newton } 248262ca8034SShashidhar Hiremath EXPORT_SYMBOL(dw_mci_suspend); 2483f95f3850SWill Newton 248462ca8034SShashidhar Hiremath int dw_mci_resume(struct dw_mci *host) 2485f95f3850SWill Newton { 2486f95f3850SWill Newton int i, ret; 2487f95f3850SWill Newton 2488f2f942ceSSachin Kamat if (host->vmmc) { 2489f2f942ceSSachin Kamat ret = regulator_enable(host->vmmc); 2490f2f942ceSSachin Kamat if (ret) { 2491f2f942ceSSachin Kamat dev_err(host->dev, 2492f2f942ceSSachin Kamat "failed to enable regulator: %d\n", ret); 2493f2f942ceSSachin Kamat return ret; 2494f2f942ceSSachin Kamat } 2495f2f942ceSSachin Kamat } 24961d6c4e0aSJaehoon Chung 24974a90920cSThomas Abraham if (!mci_wait_reset(host->dev, host)) { 2498e61cf118SJaehoon Chung ret = -ENODEV; 2499e61cf118SJaehoon Chung return ret; 2500e61cf118SJaehoon Chung } 2501e61cf118SJaehoon Chung 25023bfe619dSJonathan Kliegman if (host->use_dma && host->dma_ops->init) 2503141a712aSSeungwon Jeon host->dma_ops->init(host); 2504141a712aSSeungwon Jeon 2505e61cf118SJaehoon Chung /* Restore the old value at FIFOTH register */ 2506e61cf118SJaehoon Chung mci_writel(host, FIFOTH, host->fifoth_val); 2507e61cf118SJaehoon Chung 2508e61cf118SJaehoon Chung mci_writel(host, RINTSTS, 0xFFFFFFFF); 2509e61cf118SJaehoon Chung mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | 2510e61cf118SJaehoon Chung SDMMC_INT_TXDR | SDMMC_INT_RXDR | 2511e61cf118SJaehoon Chung DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); 2512e61cf118SJaehoon Chung mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); 2513e61cf118SJaehoon Chung 2514f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 2515f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 2516f95f3850SWill Newton if (!slot) 2517f95f3850SWill Newton continue; 2518ab269128SAbhilash Kesavan if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER) { 2519ab269128SAbhilash Kesavan dw_mci_set_ios(slot->mmc, &slot->mmc->ios); 2520ab269128SAbhilash Kesavan dw_mci_setup_bus(slot, true); 2521ab269128SAbhilash Kesavan } 2522ab269128SAbhilash Kesavan 2523f95f3850SWill Newton ret = mmc_resume_host(host->slot[i]->mmc); 2524f95f3850SWill Newton if (ret < 0) 2525f95f3850SWill Newton return ret; 2526f95f3850SWill Newton } 2527f95f3850SWill Newton return 0; 2528f95f3850SWill Newton } 252962ca8034SShashidhar Hiremath EXPORT_SYMBOL(dw_mci_resume); 25306fe8890dSJaehoon Chung #endif /* CONFIG_PM_SLEEP */ 25316fe8890dSJaehoon Chung 2532f95f3850SWill Newton static int __init dw_mci_init(void) 2533f95f3850SWill Newton { 25348e1c4e4dSSachin Kamat pr_info("Synopsys Designware Multimedia Card Interface Driver\n"); 253562ca8034SShashidhar Hiremath return 0; 2536f95f3850SWill Newton } 2537f95f3850SWill Newton 2538f95f3850SWill Newton static void __exit dw_mci_exit(void) 2539f95f3850SWill Newton { 2540f95f3850SWill Newton } 2541f95f3850SWill Newton 2542f95f3850SWill Newton module_init(dw_mci_init); 2543f95f3850SWill Newton module_exit(dw_mci_exit); 2544f95f3850SWill Newton 2545f95f3850SWill Newton MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 2546f95f3850SWill Newton MODULE_AUTHOR("NXP Semiconductor VietNam"); 2547f95f3850SWill Newton MODULE_AUTHOR("Imagination Technologies Ltd"); 2548f95f3850SWill Newton MODULE_LICENSE("GPL v2"); 2549