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/scatterlist.h> 26f95f3850SWill Newton #include <linux/seq_file.h> 27f95f3850SWill Newton #include <linux/slab.h> 28f95f3850SWill Newton #include <linux/stat.h> 29f95f3850SWill Newton #include <linux/delay.h> 30f95f3850SWill Newton #include <linux/irq.h> 31f95f3850SWill Newton #include <linux/mmc/host.h> 32f95f3850SWill Newton #include <linux/mmc/mmc.h> 33f95f3850SWill Newton #include <linux/mmc/dw_mmc.h> 34f95f3850SWill Newton #include <linux/bitops.h> 35f95f3850SWill Newton 36f95f3850SWill Newton #include "dw_mmc.h" 37f95f3850SWill Newton 38f95f3850SWill Newton /* Common flag combinations */ 39f95f3850SWill Newton #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DTO | SDMMC_INT_DCRC | \ 40f95f3850SWill Newton SDMMC_INT_HTO | SDMMC_INT_SBE | \ 41f95f3850SWill Newton SDMMC_INT_EBE) 42f95f3850SWill Newton #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \ 43f95f3850SWill Newton SDMMC_INT_RESP_ERR) 44f95f3850SWill Newton #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \ 45f95f3850SWill Newton DW_MCI_CMD_ERROR_FLAGS | SDMMC_INT_HLE) 46f95f3850SWill Newton #define DW_MCI_SEND_STATUS 1 47f95f3850SWill Newton #define DW_MCI_RECV_STATUS 2 48f95f3850SWill Newton #define DW_MCI_DMA_THRESHOLD 16 49f95f3850SWill Newton 50f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 51f95f3850SWill Newton struct idmac_desc { 52f95f3850SWill Newton u32 des0; /* Control Descriptor */ 53f95f3850SWill Newton #define IDMAC_DES0_DIC BIT(1) 54f95f3850SWill Newton #define IDMAC_DES0_LD BIT(2) 55f95f3850SWill Newton #define IDMAC_DES0_FD BIT(3) 56f95f3850SWill Newton #define IDMAC_DES0_CH BIT(4) 57f95f3850SWill Newton #define IDMAC_DES0_ER BIT(5) 58f95f3850SWill Newton #define IDMAC_DES0_CES BIT(30) 59f95f3850SWill Newton #define IDMAC_DES0_OWN BIT(31) 60f95f3850SWill Newton 61f95f3850SWill Newton u32 des1; /* Buffer sizes */ 62f95f3850SWill Newton #define IDMAC_SET_BUFFER1_SIZE(d, s) \ 63f95f3850SWill Newton ((d)->des1 = ((d)->des1 & 0x03ffc000) | ((s) & 0x3fff)) 64f95f3850SWill Newton 65f95f3850SWill Newton u32 des2; /* buffer 1 physical address */ 66f95f3850SWill Newton 67f95f3850SWill Newton u32 des3; /* buffer 2 physical address */ 68f95f3850SWill Newton }; 69f95f3850SWill Newton #endif /* CONFIG_MMC_DW_IDMAC */ 70f95f3850SWill Newton 71f95f3850SWill Newton /** 72f95f3850SWill Newton * struct dw_mci_slot - MMC slot state 73f95f3850SWill Newton * @mmc: The mmc_host representing this slot. 74f95f3850SWill Newton * @host: The MMC controller this slot is using. 75f95f3850SWill Newton * @ctype: Card type for this slot. 76f95f3850SWill Newton * @mrq: mmc_request currently being processed or waiting to be 77f95f3850SWill Newton * processed, or NULL when the slot is idle. 78f95f3850SWill Newton * @queue_node: List node for placing this node in the @queue list of 79f95f3850SWill Newton * &struct dw_mci. 80f95f3850SWill Newton * @clock: Clock rate configured by set_ios(). Protected by host->lock. 81f95f3850SWill Newton * @flags: Random state bits associated with the slot. 82f95f3850SWill Newton * @id: Number of this slot. 83f95f3850SWill Newton * @last_detect_state: Most recently observed card detect state. 84f95f3850SWill Newton */ 85f95f3850SWill Newton struct dw_mci_slot { 86f95f3850SWill Newton struct mmc_host *mmc; 87f95f3850SWill Newton struct dw_mci *host; 88f95f3850SWill Newton 89f95f3850SWill Newton u32 ctype; 90f95f3850SWill Newton 91f95f3850SWill Newton struct mmc_request *mrq; 92f95f3850SWill Newton struct list_head queue_node; 93f95f3850SWill Newton 94f95f3850SWill Newton unsigned int clock; 95f95f3850SWill Newton unsigned long flags; 96f95f3850SWill Newton #define DW_MMC_CARD_PRESENT 0 97f95f3850SWill Newton #define DW_MMC_CARD_NEED_INIT 1 98f95f3850SWill Newton int id; 99f95f3850SWill Newton int last_detect_state; 100f95f3850SWill Newton }; 101f95f3850SWill Newton 102f95f3850SWill Newton #if defined(CONFIG_DEBUG_FS) 103f95f3850SWill Newton static int dw_mci_req_show(struct seq_file *s, void *v) 104f95f3850SWill Newton { 105f95f3850SWill Newton struct dw_mci_slot *slot = s->private; 106f95f3850SWill Newton struct mmc_request *mrq; 107f95f3850SWill Newton struct mmc_command *cmd; 108f95f3850SWill Newton struct mmc_command *stop; 109f95f3850SWill Newton struct mmc_data *data; 110f95f3850SWill Newton 111f95f3850SWill Newton /* Make sure we get a consistent snapshot */ 112f95f3850SWill Newton spin_lock_bh(&slot->host->lock); 113f95f3850SWill Newton mrq = slot->mrq; 114f95f3850SWill Newton 115f95f3850SWill Newton if (mrq) { 116f95f3850SWill Newton cmd = mrq->cmd; 117f95f3850SWill Newton data = mrq->data; 118f95f3850SWill Newton stop = mrq->stop; 119f95f3850SWill Newton 120f95f3850SWill Newton if (cmd) 121f95f3850SWill Newton seq_printf(s, 122f95f3850SWill Newton "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 123f95f3850SWill Newton cmd->opcode, cmd->arg, cmd->flags, 124f95f3850SWill Newton cmd->resp[0], cmd->resp[1], cmd->resp[2], 125f95f3850SWill Newton cmd->resp[2], cmd->error); 126f95f3850SWill Newton if (data) 127f95f3850SWill Newton seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", 128f95f3850SWill Newton data->bytes_xfered, data->blocks, 129f95f3850SWill Newton data->blksz, data->flags, data->error); 130f95f3850SWill Newton if (stop) 131f95f3850SWill Newton seq_printf(s, 132f95f3850SWill Newton "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 133f95f3850SWill Newton stop->opcode, stop->arg, stop->flags, 134f95f3850SWill Newton stop->resp[0], stop->resp[1], stop->resp[2], 135f95f3850SWill Newton stop->resp[2], stop->error); 136f95f3850SWill Newton } 137f95f3850SWill Newton 138f95f3850SWill Newton spin_unlock_bh(&slot->host->lock); 139f95f3850SWill Newton 140f95f3850SWill Newton return 0; 141f95f3850SWill Newton } 142f95f3850SWill Newton 143f95f3850SWill Newton static int dw_mci_req_open(struct inode *inode, struct file *file) 144f95f3850SWill Newton { 145f95f3850SWill Newton return single_open(file, dw_mci_req_show, inode->i_private); 146f95f3850SWill Newton } 147f95f3850SWill Newton 148f95f3850SWill Newton static const struct file_operations dw_mci_req_fops = { 149f95f3850SWill Newton .owner = THIS_MODULE, 150f95f3850SWill Newton .open = dw_mci_req_open, 151f95f3850SWill Newton .read = seq_read, 152f95f3850SWill Newton .llseek = seq_lseek, 153f95f3850SWill Newton .release = single_release, 154f95f3850SWill Newton }; 155f95f3850SWill Newton 156f95f3850SWill Newton static int dw_mci_regs_show(struct seq_file *s, void *v) 157f95f3850SWill Newton { 158f95f3850SWill Newton seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); 159f95f3850SWill Newton seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); 160f95f3850SWill Newton seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); 161f95f3850SWill Newton seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); 162f95f3850SWill Newton seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); 163f95f3850SWill Newton seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); 164f95f3850SWill Newton 165f95f3850SWill Newton return 0; 166f95f3850SWill Newton } 167f95f3850SWill Newton 168f95f3850SWill Newton static int dw_mci_regs_open(struct inode *inode, struct file *file) 169f95f3850SWill Newton { 170f95f3850SWill Newton return single_open(file, dw_mci_regs_show, inode->i_private); 171f95f3850SWill Newton } 172f95f3850SWill Newton 173f95f3850SWill Newton static const struct file_operations dw_mci_regs_fops = { 174f95f3850SWill Newton .owner = THIS_MODULE, 175f95f3850SWill Newton .open = dw_mci_regs_open, 176f95f3850SWill Newton .read = seq_read, 177f95f3850SWill Newton .llseek = seq_lseek, 178f95f3850SWill Newton .release = single_release, 179f95f3850SWill Newton }; 180f95f3850SWill Newton 181f95f3850SWill Newton static void dw_mci_init_debugfs(struct dw_mci_slot *slot) 182f95f3850SWill Newton { 183f95f3850SWill Newton struct mmc_host *mmc = slot->mmc; 184f95f3850SWill Newton struct dw_mci *host = slot->host; 185f95f3850SWill Newton struct dentry *root; 186f95f3850SWill Newton struct dentry *node; 187f95f3850SWill Newton 188f95f3850SWill Newton root = mmc->debugfs_root; 189f95f3850SWill Newton if (!root) 190f95f3850SWill Newton return; 191f95f3850SWill Newton 192f95f3850SWill Newton node = debugfs_create_file("regs", S_IRUSR, root, host, 193f95f3850SWill Newton &dw_mci_regs_fops); 194f95f3850SWill Newton if (!node) 195f95f3850SWill Newton goto err; 196f95f3850SWill Newton 197f95f3850SWill Newton node = debugfs_create_file("req", S_IRUSR, root, slot, 198f95f3850SWill Newton &dw_mci_req_fops); 199f95f3850SWill Newton if (!node) 200f95f3850SWill Newton goto err; 201f95f3850SWill Newton 202f95f3850SWill Newton node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); 203f95f3850SWill Newton if (!node) 204f95f3850SWill Newton goto err; 205f95f3850SWill Newton 206f95f3850SWill Newton node = debugfs_create_x32("pending_events", S_IRUSR, root, 207f95f3850SWill Newton (u32 *)&host->pending_events); 208f95f3850SWill Newton if (!node) 209f95f3850SWill Newton goto err; 210f95f3850SWill Newton 211f95f3850SWill Newton node = debugfs_create_x32("completed_events", S_IRUSR, root, 212f95f3850SWill Newton (u32 *)&host->completed_events); 213f95f3850SWill Newton if (!node) 214f95f3850SWill Newton goto err; 215f95f3850SWill Newton 216f95f3850SWill Newton return; 217f95f3850SWill Newton 218f95f3850SWill Newton err: 219f95f3850SWill Newton dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); 220f95f3850SWill Newton } 221f95f3850SWill Newton #endif /* defined(CONFIG_DEBUG_FS) */ 222f95f3850SWill Newton 223f95f3850SWill Newton static void dw_mci_set_timeout(struct dw_mci *host) 224f95f3850SWill Newton { 225f95f3850SWill Newton /* timeout (maximum) */ 226f95f3850SWill Newton mci_writel(host, TMOUT, 0xffffffff); 227f95f3850SWill Newton } 228f95f3850SWill Newton 229f95f3850SWill Newton static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) 230f95f3850SWill Newton { 231f95f3850SWill Newton struct mmc_data *data; 232f95f3850SWill Newton u32 cmdr; 233f95f3850SWill Newton cmd->error = -EINPROGRESS; 234f95f3850SWill Newton 235f95f3850SWill Newton cmdr = cmd->opcode; 236f95f3850SWill Newton 237f95f3850SWill Newton if (cmdr == MMC_STOP_TRANSMISSION) 238f95f3850SWill Newton cmdr |= SDMMC_CMD_STOP; 239f95f3850SWill Newton else 240f95f3850SWill Newton cmdr |= SDMMC_CMD_PRV_DAT_WAIT; 241f95f3850SWill Newton 242f95f3850SWill Newton if (cmd->flags & MMC_RSP_PRESENT) { 243f95f3850SWill Newton /* We expect a response, so set this bit */ 244f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_EXP; 245f95f3850SWill Newton if (cmd->flags & MMC_RSP_136) 246f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_LONG; 247f95f3850SWill Newton } 248f95f3850SWill Newton 249f95f3850SWill Newton if (cmd->flags & MMC_RSP_CRC) 250f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_CRC; 251f95f3850SWill Newton 252f95f3850SWill Newton data = cmd->data; 253f95f3850SWill Newton if (data) { 254f95f3850SWill Newton cmdr |= SDMMC_CMD_DAT_EXP; 255f95f3850SWill Newton if (data->flags & MMC_DATA_STREAM) 256f95f3850SWill Newton cmdr |= SDMMC_CMD_STRM_MODE; 257f95f3850SWill Newton if (data->flags & MMC_DATA_WRITE) 258f95f3850SWill Newton cmdr |= SDMMC_CMD_DAT_WR; 259f95f3850SWill Newton } 260f95f3850SWill Newton 261f95f3850SWill Newton return cmdr; 262f95f3850SWill Newton } 263f95f3850SWill Newton 264f95f3850SWill Newton static void dw_mci_start_command(struct dw_mci *host, 265f95f3850SWill Newton struct mmc_command *cmd, u32 cmd_flags) 266f95f3850SWill Newton { 267f95f3850SWill Newton host->cmd = cmd; 268f95f3850SWill Newton dev_vdbg(&host->pdev->dev, 269f95f3850SWill Newton "start command: ARGR=0x%08x CMDR=0x%08x\n", 270f95f3850SWill Newton cmd->arg, cmd_flags); 271f95f3850SWill Newton 272f95f3850SWill Newton mci_writel(host, CMDARG, cmd->arg); 273f95f3850SWill Newton wmb(); 274f95f3850SWill Newton 275f95f3850SWill Newton mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); 276f95f3850SWill Newton } 277f95f3850SWill Newton 278f95f3850SWill Newton static void send_stop_cmd(struct dw_mci *host, struct mmc_data *data) 279f95f3850SWill Newton { 280f95f3850SWill Newton dw_mci_start_command(host, data->stop, host->stop_cmdr); 281f95f3850SWill Newton } 282f95f3850SWill Newton 283f95f3850SWill Newton /* DMA interface functions */ 284f95f3850SWill Newton static void dw_mci_stop_dma(struct dw_mci *host) 285f95f3850SWill Newton { 286f95f3850SWill Newton if (host->use_dma) { 287f95f3850SWill Newton host->dma_ops->stop(host); 288f95f3850SWill Newton host->dma_ops->cleanup(host); 289f95f3850SWill Newton } else { 290f95f3850SWill Newton /* Data transfer was stopped by the interrupt handler */ 291f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 292f95f3850SWill Newton } 293f95f3850SWill Newton } 294f95f3850SWill Newton 295f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 296f95f3850SWill Newton static void dw_mci_dma_cleanup(struct dw_mci *host) 297f95f3850SWill Newton { 298f95f3850SWill Newton struct mmc_data *data = host->data; 299f95f3850SWill Newton 300f95f3850SWill Newton if (data) 301f95f3850SWill Newton dma_unmap_sg(&host->pdev->dev, data->sg, data->sg_len, 302f95f3850SWill Newton ((data->flags & MMC_DATA_WRITE) 303f95f3850SWill Newton ? DMA_TO_DEVICE : DMA_FROM_DEVICE)); 304f95f3850SWill Newton } 305f95f3850SWill Newton 306f95f3850SWill Newton static void dw_mci_idmac_stop_dma(struct dw_mci *host) 307f95f3850SWill Newton { 308f95f3850SWill Newton u32 temp; 309f95f3850SWill Newton 310f95f3850SWill Newton /* Disable and reset the IDMAC interface */ 311f95f3850SWill Newton temp = mci_readl(host, CTRL); 312f95f3850SWill Newton temp &= ~SDMMC_CTRL_USE_IDMAC; 313f95f3850SWill Newton temp |= SDMMC_CTRL_DMA_RESET; 314f95f3850SWill Newton mci_writel(host, CTRL, temp); 315f95f3850SWill Newton 316f95f3850SWill Newton /* Stop the IDMAC running */ 317f95f3850SWill Newton temp = mci_readl(host, BMOD); 318f95f3850SWill Newton temp &= ~SDMMC_IDMAC_ENABLE; 319f95f3850SWill Newton mci_writel(host, BMOD, temp); 320f95f3850SWill Newton } 321f95f3850SWill Newton 322f95f3850SWill Newton static void dw_mci_idmac_complete_dma(struct dw_mci *host) 323f95f3850SWill Newton { 324f95f3850SWill Newton struct mmc_data *data = host->data; 325f95f3850SWill Newton 326f95f3850SWill Newton dev_vdbg(&host->pdev->dev, "DMA complete\n"); 327f95f3850SWill Newton 328f95f3850SWill Newton host->dma_ops->cleanup(host); 329f95f3850SWill Newton 330f95f3850SWill Newton /* 331f95f3850SWill Newton * If the card was removed, data will be NULL. No point in trying to 332f95f3850SWill Newton * send the stop command or waiting for NBUSY in this case. 333f95f3850SWill Newton */ 334f95f3850SWill Newton if (data) { 335f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 336f95f3850SWill Newton tasklet_schedule(&host->tasklet); 337f95f3850SWill Newton } 338f95f3850SWill Newton } 339f95f3850SWill Newton 340f95f3850SWill Newton static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, 341f95f3850SWill Newton unsigned int sg_len) 342f95f3850SWill Newton { 343f95f3850SWill Newton int i; 344f95f3850SWill Newton struct idmac_desc *desc = host->sg_cpu; 345f95f3850SWill Newton 346f95f3850SWill Newton for (i = 0; i < sg_len; i++, desc++) { 347f95f3850SWill Newton unsigned int length = sg_dma_len(&data->sg[i]); 348f95f3850SWill Newton u32 mem_addr = sg_dma_address(&data->sg[i]); 349f95f3850SWill Newton 350f95f3850SWill Newton /* Set the OWN bit and disable interrupts for this descriptor */ 351f95f3850SWill Newton desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | IDMAC_DES0_CH; 352f95f3850SWill Newton 353f95f3850SWill Newton /* Buffer length */ 354f95f3850SWill Newton IDMAC_SET_BUFFER1_SIZE(desc, length); 355f95f3850SWill Newton 356f95f3850SWill Newton /* Physical address to DMA to/from */ 357f95f3850SWill Newton desc->des2 = mem_addr; 358f95f3850SWill Newton } 359f95f3850SWill Newton 360f95f3850SWill Newton /* Set first descriptor */ 361f95f3850SWill Newton desc = host->sg_cpu; 362f95f3850SWill Newton desc->des0 |= IDMAC_DES0_FD; 363f95f3850SWill Newton 364f95f3850SWill Newton /* Set last descriptor */ 365f95f3850SWill Newton desc = host->sg_cpu + (i - 1) * sizeof(struct idmac_desc); 366f95f3850SWill Newton desc->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); 367f95f3850SWill Newton desc->des0 |= IDMAC_DES0_LD; 368f95f3850SWill Newton 369f95f3850SWill Newton wmb(); 370f95f3850SWill Newton } 371f95f3850SWill Newton 372f95f3850SWill Newton static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) 373f95f3850SWill Newton { 374f95f3850SWill Newton u32 temp; 375f95f3850SWill Newton 376f95f3850SWill Newton dw_mci_translate_sglist(host, host->data, sg_len); 377f95f3850SWill Newton 378f95f3850SWill Newton /* Select IDMAC interface */ 379f95f3850SWill Newton temp = mci_readl(host, CTRL); 380f95f3850SWill Newton temp |= SDMMC_CTRL_USE_IDMAC; 381f95f3850SWill Newton mci_writel(host, CTRL, temp); 382f95f3850SWill Newton 383f95f3850SWill Newton wmb(); 384f95f3850SWill Newton 385f95f3850SWill Newton /* Enable the IDMAC */ 386f95f3850SWill Newton temp = mci_readl(host, BMOD); 387f95f3850SWill Newton temp |= SDMMC_IDMAC_ENABLE; 388f95f3850SWill Newton mci_writel(host, BMOD, temp); 389f95f3850SWill Newton 390f95f3850SWill Newton /* Start it running */ 391f95f3850SWill Newton mci_writel(host, PLDMND, 1); 392f95f3850SWill Newton } 393f95f3850SWill Newton 394f95f3850SWill Newton static int dw_mci_idmac_init(struct dw_mci *host) 395f95f3850SWill Newton { 396f95f3850SWill Newton struct idmac_desc *p; 397f95f3850SWill Newton int i; 398f95f3850SWill Newton 399f95f3850SWill Newton /* Number of descriptors in the ring buffer */ 400f95f3850SWill Newton host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc); 401f95f3850SWill Newton 402f95f3850SWill Newton /* Forward link the descriptor list */ 403f95f3850SWill Newton for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++) 404f95f3850SWill Newton p->des3 = host->sg_dma + (sizeof(struct idmac_desc) * (i + 1)); 405f95f3850SWill Newton 406f95f3850SWill Newton /* Set the last descriptor as the end-of-ring descriptor */ 407f95f3850SWill Newton p->des3 = host->sg_dma; 408f95f3850SWill Newton p->des0 = IDMAC_DES0_ER; 409f95f3850SWill Newton 410f95f3850SWill Newton /* Mask out interrupts - get Tx & Rx complete only */ 411f95f3850SWill Newton mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | SDMMC_IDMAC_INT_RI | 412f95f3850SWill Newton SDMMC_IDMAC_INT_TI); 413f95f3850SWill Newton 414f95f3850SWill Newton /* Set the descriptor base address */ 415f95f3850SWill Newton mci_writel(host, DBADDR, host->sg_dma); 416f95f3850SWill Newton return 0; 417f95f3850SWill Newton } 418f95f3850SWill Newton 419f95f3850SWill Newton static struct dw_mci_dma_ops dw_mci_idmac_ops = { 420f95f3850SWill Newton .init = dw_mci_idmac_init, 421f95f3850SWill Newton .start = dw_mci_idmac_start_dma, 422f95f3850SWill Newton .stop = dw_mci_idmac_stop_dma, 423f95f3850SWill Newton .complete = dw_mci_idmac_complete_dma, 424f95f3850SWill Newton .cleanup = dw_mci_dma_cleanup, 425f95f3850SWill Newton }; 426f95f3850SWill Newton #endif /* CONFIG_MMC_DW_IDMAC */ 427f95f3850SWill Newton 428f95f3850SWill Newton static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) 429f95f3850SWill Newton { 430f95f3850SWill Newton struct scatterlist *sg; 431f95f3850SWill Newton unsigned int i, direction, sg_len; 432f95f3850SWill Newton u32 temp; 433f95f3850SWill Newton 434f95f3850SWill Newton /* If we don't have a channel, we can't do DMA */ 435f95f3850SWill Newton if (!host->use_dma) 436f95f3850SWill Newton return -ENODEV; 437f95f3850SWill Newton 438f95f3850SWill Newton /* 439f95f3850SWill Newton * We don't do DMA on "complex" transfers, i.e. with 440f95f3850SWill Newton * non-word-aligned buffers or lengths. Also, we don't bother 441f95f3850SWill Newton * with all the DMA setup overhead for short transfers. 442f95f3850SWill Newton */ 443f95f3850SWill Newton if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) 444f95f3850SWill Newton return -EINVAL; 445f95f3850SWill Newton if (data->blksz & 3) 446f95f3850SWill Newton return -EINVAL; 447f95f3850SWill Newton 448f95f3850SWill Newton for_each_sg(data->sg, sg, data->sg_len, i) { 449f95f3850SWill Newton if (sg->offset & 3 || sg->length & 3) 450f95f3850SWill Newton return -EINVAL; 451f95f3850SWill Newton } 452f95f3850SWill Newton 453f95f3850SWill Newton if (data->flags & MMC_DATA_READ) 454f95f3850SWill Newton direction = DMA_FROM_DEVICE; 455f95f3850SWill Newton else 456f95f3850SWill Newton direction = DMA_TO_DEVICE; 457f95f3850SWill Newton 458f95f3850SWill Newton sg_len = dma_map_sg(&host->pdev->dev, data->sg, data->sg_len, 459f95f3850SWill Newton direction); 460f95f3850SWill Newton 461f95f3850SWill Newton dev_vdbg(&host->pdev->dev, 462f95f3850SWill Newton "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", 463f95f3850SWill Newton (unsigned long)host->sg_cpu, (unsigned long)host->sg_dma, 464f95f3850SWill Newton sg_len); 465f95f3850SWill Newton 466f95f3850SWill Newton /* Enable the DMA interface */ 467f95f3850SWill Newton temp = mci_readl(host, CTRL); 468f95f3850SWill Newton temp |= SDMMC_CTRL_DMA_ENABLE; 469f95f3850SWill Newton mci_writel(host, CTRL, temp); 470f95f3850SWill Newton 471f95f3850SWill Newton /* Disable RX/TX IRQs, let DMA handle it */ 472f95f3850SWill Newton temp = mci_readl(host, INTMASK); 473f95f3850SWill Newton temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); 474f95f3850SWill Newton mci_writel(host, INTMASK, temp); 475f95f3850SWill Newton 476f95f3850SWill Newton host->dma_ops->start(host, sg_len); 477f95f3850SWill Newton 478f95f3850SWill Newton return 0; 479f95f3850SWill Newton } 480f95f3850SWill Newton 481f95f3850SWill Newton static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) 482f95f3850SWill Newton { 483f95f3850SWill Newton u32 temp; 484f95f3850SWill Newton 485f95f3850SWill Newton data->error = -EINPROGRESS; 486f95f3850SWill Newton 487f95f3850SWill Newton WARN_ON(host->data); 488f95f3850SWill Newton host->sg = NULL; 489f95f3850SWill Newton host->data = data; 490f95f3850SWill Newton 491f95f3850SWill Newton if (dw_mci_submit_data_dma(host, data)) { 492f95f3850SWill Newton host->sg = data->sg; 493f95f3850SWill Newton host->pio_offset = 0; 494f95f3850SWill Newton if (data->flags & MMC_DATA_READ) 495f95f3850SWill Newton host->dir_status = DW_MCI_RECV_STATUS; 496f95f3850SWill Newton else 497f95f3850SWill Newton host->dir_status = DW_MCI_SEND_STATUS; 498f95f3850SWill Newton 499f95f3850SWill Newton temp = mci_readl(host, INTMASK); 500f95f3850SWill Newton temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; 501f95f3850SWill Newton mci_writel(host, INTMASK, temp); 502f95f3850SWill Newton 503f95f3850SWill Newton temp = mci_readl(host, CTRL); 504f95f3850SWill Newton temp &= ~SDMMC_CTRL_DMA_ENABLE; 505f95f3850SWill Newton mci_writel(host, CTRL, temp); 506f95f3850SWill Newton } 507f95f3850SWill Newton } 508f95f3850SWill Newton 509f95f3850SWill Newton static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) 510f95f3850SWill Newton { 511f95f3850SWill Newton struct dw_mci *host = slot->host; 512f95f3850SWill Newton unsigned long timeout = jiffies + msecs_to_jiffies(500); 513f95f3850SWill Newton unsigned int cmd_status = 0; 514f95f3850SWill Newton 515f95f3850SWill Newton mci_writel(host, CMDARG, arg); 516f95f3850SWill Newton wmb(); 517f95f3850SWill Newton mci_writel(host, CMD, SDMMC_CMD_START | cmd); 518f95f3850SWill Newton 519f95f3850SWill Newton while (time_before(jiffies, timeout)) { 520f95f3850SWill Newton cmd_status = mci_readl(host, CMD); 521f95f3850SWill Newton if (!(cmd_status & SDMMC_CMD_START)) 522f95f3850SWill Newton return; 523f95f3850SWill Newton } 524f95f3850SWill Newton dev_err(&slot->mmc->class_dev, 525f95f3850SWill Newton "Timeout sending command (cmd %#x arg %#x status %#x)\n", 526f95f3850SWill Newton cmd, arg, cmd_status); 527f95f3850SWill Newton } 528f95f3850SWill Newton 529f95f3850SWill Newton static void dw_mci_setup_bus(struct dw_mci_slot *slot) 530f95f3850SWill Newton { 531f95f3850SWill Newton struct dw_mci *host = slot->host; 532f95f3850SWill Newton u32 div; 533f95f3850SWill Newton 534f95f3850SWill Newton if (slot->clock != host->current_speed) { 535f95f3850SWill Newton if (host->bus_hz % slot->clock) 536f95f3850SWill Newton /* 537f95f3850SWill Newton * move the + 1 after the divide to prevent 538f95f3850SWill Newton * over-clocking the card. 539f95f3850SWill Newton */ 540f95f3850SWill Newton div = ((host->bus_hz / slot->clock) >> 1) + 1; 541f95f3850SWill Newton else 542f95f3850SWill Newton div = (host->bus_hz / slot->clock) >> 1; 543f95f3850SWill Newton 544f95f3850SWill Newton dev_info(&slot->mmc->class_dev, 545f95f3850SWill Newton "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ" 546f95f3850SWill Newton " div = %d)\n", slot->id, host->bus_hz, slot->clock, 547f95f3850SWill Newton div ? ((host->bus_hz / div) >> 1) : host->bus_hz, div); 548f95f3850SWill Newton 549f95f3850SWill Newton /* disable clock */ 550f95f3850SWill Newton mci_writel(host, CLKENA, 0); 551f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 552f95f3850SWill Newton 553f95f3850SWill Newton /* inform CIU */ 554f95f3850SWill Newton mci_send_cmd(slot, 555f95f3850SWill Newton SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); 556f95f3850SWill Newton 557f95f3850SWill Newton /* set clock to desired speed */ 558f95f3850SWill Newton mci_writel(host, CLKDIV, div); 559f95f3850SWill Newton 560f95f3850SWill Newton /* inform CIU */ 561f95f3850SWill Newton mci_send_cmd(slot, 562f95f3850SWill Newton SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); 563f95f3850SWill Newton 564f95f3850SWill Newton /* enable clock */ 565aadb9f41SWill Newton mci_writel(host, CLKENA, SDMMC_CLKEN_ENABLE | 566aadb9f41SWill Newton SDMMC_CLKEN_LOW_PWR); 567f95f3850SWill Newton 568f95f3850SWill Newton /* inform CIU */ 569f95f3850SWill Newton mci_send_cmd(slot, 570f95f3850SWill Newton SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); 571f95f3850SWill Newton 572f95f3850SWill Newton host->current_speed = slot->clock; 573f95f3850SWill Newton } 574f95f3850SWill Newton 575f95f3850SWill Newton /* Set the current slot bus width */ 576f95f3850SWill Newton mci_writel(host, CTYPE, slot->ctype); 577f95f3850SWill Newton } 578f95f3850SWill Newton 579f95f3850SWill Newton static void dw_mci_start_request(struct dw_mci *host, 580f95f3850SWill Newton struct dw_mci_slot *slot) 581f95f3850SWill Newton { 582f95f3850SWill Newton struct mmc_request *mrq; 583f95f3850SWill Newton struct mmc_command *cmd; 584f95f3850SWill Newton struct mmc_data *data; 585f95f3850SWill Newton u32 cmdflags; 586f95f3850SWill Newton 587f95f3850SWill Newton mrq = slot->mrq; 588f95f3850SWill Newton if (host->pdata->select_slot) 589f95f3850SWill Newton host->pdata->select_slot(slot->id); 590f95f3850SWill Newton 591f95f3850SWill Newton /* Slot specific timing and width adjustment */ 592f95f3850SWill Newton dw_mci_setup_bus(slot); 593f95f3850SWill Newton 594f95f3850SWill Newton host->cur_slot = slot; 595f95f3850SWill Newton host->mrq = mrq; 596f95f3850SWill Newton 597f95f3850SWill Newton host->pending_events = 0; 598f95f3850SWill Newton host->completed_events = 0; 599f95f3850SWill Newton host->data_status = 0; 600f95f3850SWill Newton 601f95f3850SWill Newton data = mrq->data; 602f95f3850SWill Newton if (data) { 603f95f3850SWill Newton dw_mci_set_timeout(host); 604f95f3850SWill Newton mci_writel(host, BYTCNT, data->blksz*data->blocks); 605f95f3850SWill Newton mci_writel(host, BLKSIZ, data->blksz); 606f95f3850SWill Newton } 607f95f3850SWill Newton 608f95f3850SWill Newton cmd = mrq->cmd; 609f95f3850SWill Newton cmdflags = dw_mci_prepare_command(slot->mmc, cmd); 610f95f3850SWill Newton 611f95f3850SWill Newton /* this is the first command, send the initialization clock */ 612f95f3850SWill Newton if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) 613f95f3850SWill Newton cmdflags |= SDMMC_CMD_INIT; 614f95f3850SWill Newton 615f95f3850SWill Newton if (data) { 616f95f3850SWill Newton dw_mci_submit_data(host, data); 617f95f3850SWill Newton wmb(); 618f95f3850SWill Newton } 619f95f3850SWill Newton 620f95f3850SWill Newton dw_mci_start_command(host, cmd, cmdflags); 621f95f3850SWill Newton 622f95f3850SWill Newton if (mrq->stop) 623f95f3850SWill Newton host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); 624f95f3850SWill Newton } 625f95f3850SWill Newton 626f95f3850SWill Newton static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, 627f95f3850SWill Newton struct mmc_request *mrq) 628f95f3850SWill Newton { 629f95f3850SWill Newton dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", 630f95f3850SWill Newton host->state); 631f95f3850SWill Newton 632f95f3850SWill Newton spin_lock_bh(&host->lock); 633f95f3850SWill Newton slot->mrq = mrq; 634f95f3850SWill Newton 635f95f3850SWill Newton if (host->state == STATE_IDLE) { 636f95f3850SWill Newton host->state = STATE_SENDING_CMD; 637f95f3850SWill Newton dw_mci_start_request(host, slot); 638f95f3850SWill Newton } else { 639f95f3850SWill Newton list_add_tail(&slot->queue_node, &host->queue); 640f95f3850SWill Newton } 641f95f3850SWill Newton 642f95f3850SWill Newton spin_unlock_bh(&host->lock); 643f95f3850SWill Newton } 644f95f3850SWill Newton 645f95f3850SWill Newton static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) 646f95f3850SWill Newton { 647f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 648f95f3850SWill Newton struct dw_mci *host = slot->host; 649f95f3850SWill Newton 650f95f3850SWill Newton WARN_ON(slot->mrq); 651f95f3850SWill Newton 652f95f3850SWill Newton if (!test_bit(DW_MMC_CARD_PRESENT, &slot->flags)) { 653f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 654f95f3850SWill Newton mmc_request_done(mmc, mrq); 655f95f3850SWill Newton return; 656f95f3850SWill Newton } 657f95f3850SWill Newton 658f95f3850SWill Newton /* We don't support multiple blocks of weird lengths. */ 659f95f3850SWill Newton dw_mci_queue_request(host, slot, mrq); 660f95f3850SWill Newton } 661f95f3850SWill Newton 662f95f3850SWill Newton static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 663f95f3850SWill Newton { 664f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 665*41babf75SJaehoon Chung u32 regs; 666f95f3850SWill Newton 667f95f3850SWill Newton /* set default 1 bit mode */ 668f95f3850SWill Newton slot->ctype = SDMMC_CTYPE_1BIT; 669f95f3850SWill Newton 670f95f3850SWill Newton switch (ios->bus_width) { 671f95f3850SWill Newton case MMC_BUS_WIDTH_1: 672f95f3850SWill Newton slot->ctype = SDMMC_CTYPE_1BIT; 673f95f3850SWill Newton break; 674f95f3850SWill Newton case MMC_BUS_WIDTH_4: 675f95f3850SWill Newton slot->ctype = SDMMC_CTYPE_4BIT; 676f95f3850SWill Newton break; 677c9b2a06fSJaehoon Chung case MMC_BUS_WIDTH_8: 678c9b2a06fSJaehoon Chung slot->ctype = SDMMC_CTYPE_8BIT; 679c9b2a06fSJaehoon Chung break; 680f95f3850SWill Newton } 681f95f3850SWill Newton 682*41babf75SJaehoon Chung /* DDR mode set */ 683*41babf75SJaehoon Chung if (ios->ddr) { 684*41babf75SJaehoon Chung regs = mci_readl(slot->host, UHS_REG); 685*41babf75SJaehoon Chung regs |= (0x1 << slot->id) << 16; 686*41babf75SJaehoon Chung mci_writel(slot->host, UHS_REG, regs); 687*41babf75SJaehoon Chung } 688*41babf75SJaehoon Chung 689f95f3850SWill Newton if (ios->clock) { 690f95f3850SWill Newton /* 691f95f3850SWill Newton * Use mirror of ios->clock to prevent race with mmc 692f95f3850SWill Newton * core ios update when finding the minimum. 693f95f3850SWill Newton */ 694f95f3850SWill Newton slot->clock = ios->clock; 695f95f3850SWill Newton } 696f95f3850SWill Newton 697f95f3850SWill Newton switch (ios->power_mode) { 698f95f3850SWill Newton case MMC_POWER_UP: 699f95f3850SWill Newton set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); 700f95f3850SWill Newton break; 701f95f3850SWill Newton default: 702f95f3850SWill Newton break; 703f95f3850SWill Newton } 704f95f3850SWill Newton } 705f95f3850SWill Newton 706f95f3850SWill Newton static int dw_mci_get_ro(struct mmc_host *mmc) 707f95f3850SWill Newton { 708f95f3850SWill Newton int read_only; 709f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 710f95f3850SWill Newton struct dw_mci_board *brd = slot->host->pdata; 711f95f3850SWill Newton 712f95f3850SWill Newton /* Use platform get_ro function, else try on board write protect */ 713f95f3850SWill Newton if (brd->get_ro) 714f95f3850SWill Newton read_only = brd->get_ro(slot->id); 715f95f3850SWill Newton else 716f95f3850SWill Newton read_only = 717f95f3850SWill Newton mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; 718f95f3850SWill Newton 719f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is %s\n", 720f95f3850SWill Newton read_only ? "read-only" : "read-write"); 721f95f3850SWill Newton 722f95f3850SWill Newton return read_only; 723f95f3850SWill Newton } 724f95f3850SWill Newton 725f95f3850SWill Newton static int dw_mci_get_cd(struct mmc_host *mmc) 726f95f3850SWill Newton { 727f95f3850SWill Newton int present; 728f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 729f95f3850SWill Newton struct dw_mci_board *brd = slot->host->pdata; 730f95f3850SWill Newton 731f95f3850SWill Newton /* Use platform get_cd function, else try onboard card detect */ 732f95f3850SWill Newton if (brd->get_cd) 733f95f3850SWill Newton present = !brd->get_cd(slot->id); 734f95f3850SWill Newton else 735f95f3850SWill Newton present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) 736f95f3850SWill Newton == 0 ? 1 : 0; 737f95f3850SWill Newton 738f95f3850SWill Newton if (present) 739f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is present\n"); 740f95f3850SWill Newton else 741f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is not present\n"); 742f95f3850SWill Newton 743f95f3850SWill Newton return present; 744f95f3850SWill Newton } 745f95f3850SWill Newton 746f95f3850SWill Newton static const struct mmc_host_ops dw_mci_ops = { 747f95f3850SWill Newton .request = dw_mci_request, 748f95f3850SWill Newton .set_ios = dw_mci_set_ios, 749f95f3850SWill Newton .get_ro = dw_mci_get_ro, 750f95f3850SWill Newton .get_cd = dw_mci_get_cd, 751f95f3850SWill Newton }; 752f95f3850SWill Newton 753f95f3850SWill Newton static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) 754f95f3850SWill Newton __releases(&host->lock) 755f95f3850SWill Newton __acquires(&host->lock) 756f95f3850SWill Newton { 757f95f3850SWill Newton struct dw_mci_slot *slot; 758f95f3850SWill Newton struct mmc_host *prev_mmc = host->cur_slot->mmc; 759f95f3850SWill Newton 760f95f3850SWill Newton WARN_ON(host->cmd || host->data); 761f95f3850SWill Newton 762f95f3850SWill Newton host->cur_slot->mrq = NULL; 763f95f3850SWill Newton host->mrq = NULL; 764f95f3850SWill Newton if (!list_empty(&host->queue)) { 765f95f3850SWill Newton slot = list_entry(host->queue.next, 766f95f3850SWill Newton struct dw_mci_slot, queue_node); 767f95f3850SWill Newton list_del(&slot->queue_node); 768f95f3850SWill Newton dev_vdbg(&host->pdev->dev, "list not empty: %s is next\n", 769f95f3850SWill Newton mmc_hostname(slot->mmc)); 770f95f3850SWill Newton host->state = STATE_SENDING_CMD; 771f95f3850SWill Newton dw_mci_start_request(host, slot); 772f95f3850SWill Newton } else { 773f95f3850SWill Newton dev_vdbg(&host->pdev->dev, "list empty\n"); 774f95f3850SWill Newton host->state = STATE_IDLE; 775f95f3850SWill Newton } 776f95f3850SWill Newton 777f95f3850SWill Newton spin_unlock(&host->lock); 778f95f3850SWill Newton mmc_request_done(prev_mmc, mrq); 779f95f3850SWill Newton spin_lock(&host->lock); 780f95f3850SWill Newton } 781f95f3850SWill Newton 782f95f3850SWill Newton static void dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) 783f95f3850SWill Newton { 784f95f3850SWill Newton u32 status = host->cmd_status; 785f95f3850SWill Newton 786f95f3850SWill Newton host->cmd_status = 0; 787f95f3850SWill Newton 788f95f3850SWill Newton /* Read the response from the card (up to 16 bytes) */ 789f95f3850SWill Newton if (cmd->flags & MMC_RSP_PRESENT) { 790f95f3850SWill Newton if (cmd->flags & MMC_RSP_136) { 791f95f3850SWill Newton cmd->resp[3] = mci_readl(host, RESP0); 792f95f3850SWill Newton cmd->resp[2] = mci_readl(host, RESP1); 793f95f3850SWill Newton cmd->resp[1] = mci_readl(host, RESP2); 794f95f3850SWill Newton cmd->resp[0] = mci_readl(host, RESP3); 795f95f3850SWill Newton } else { 796f95f3850SWill Newton cmd->resp[0] = mci_readl(host, RESP0); 797f95f3850SWill Newton cmd->resp[1] = 0; 798f95f3850SWill Newton cmd->resp[2] = 0; 799f95f3850SWill Newton cmd->resp[3] = 0; 800f95f3850SWill Newton } 801f95f3850SWill Newton } 802f95f3850SWill Newton 803f95f3850SWill Newton if (status & SDMMC_INT_RTO) 804f95f3850SWill Newton cmd->error = -ETIMEDOUT; 805f95f3850SWill Newton else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) 806f95f3850SWill Newton cmd->error = -EILSEQ; 807f95f3850SWill Newton else if (status & SDMMC_INT_RESP_ERR) 808f95f3850SWill Newton cmd->error = -EIO; 809f95f3850SWill Newton else 810f95f3850SWill Newton cmd->error = 0; 811f95f3850SWill Newton 812f95f3850SWill Newton if (cmd->error) { 813f95f3850SWill Newton /* newer ip versions need a delay between retries */ 814f95f3850SWill Newton if (host->quirks & DW_MCI_QUIRK_RETRY_DELAY) 815f95f3850SWill Newton mdelay(20); 816f95f3850SWill Newton 817f95f3850SWill Newton if (cmd->data) { 818f95f3850SWill Newton host->data = NULL; 819f95f3850SWill Newton dw_mci_stop_dma(host); 820f95f3850SWill Newton } 821f95f3850SWill Newton } 822f95f3850SWill Newton } 823f95f3850SWill Newton 824f95f3850SWill Newton static void dw_mci_tasklet_func(unsigned long priv) 825f95f3850SWill Newton { 826f95f3850SWill Newton struct dw_mci *host = (struct dw_mci *)priv; 827f95f3850SWill Newton struct mmc_data *data; 828f95f3850SWill Newton struct mmc_command *cmd; 829f95f3850SWill Newton enum dw_mci_state state; 830f95f3850SWill Newton enum dw_mci_state prev_state; 831f95f3850SWill Newton u32 status; 832f95f3850SWill Newton 833f95f3850SWill Newton spin_lock(&host->lock); 834f95f3850SWill Newton 835f95f3850SWill Newton state = host->state; 836f95f3850SWill Newton data = host->data; 837f95f3850SWill Newton 838f95f3850SWill Newton do { 839f95f3850SWill Newton prev_state = state; 840f95f3850SWill Newton 841f95f3850SWill Newton switch (state) { 842f95f3850SWill Newton case STATE_IDLE: 843f95f3850SWill Newton break; 844f95f3850SWill Newton 845f95f3850SWill Newton case STATE_SENDING_CMD: 846f95f3850SWill Newton if (!test_and_clear_bit(EVENT_CMD_COMPLETE, 847f95f3850SWill Newton &host->pending_events)) 848f95f3850SWill Newton break; 849f95f3850SWill Newton 850f95f3850SWill Newton cmd = host->cmd; 851f95f3850SWill Newton host->cmd = NULL; 852f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->completed_events); 853f95f3850SWill Newton dw_mci_command_complete(host, host->mrq->cmd); 854f95f3850SWill Newton if (!host->mrq->data || cmd->error) { 855f95f3850SWill Newton dw_mci_request_end(host, host->mrq); 856f95f3850SWill Newton goto unlock; 857f95f3850SWill Newton } 858f95f3850SWill Newton 859f95f3850SWill Newton prev_state = state = STATE_SENDING_DATA; 860f95f3850SWill Newton /* fall through */ 861f95f3850SWill Newton 862f95f3850SWill Newton case STATE_SENDING_DATA: 863f95f3850SWill Newton if (test_and_clear_bit(EVENT_DATA_ERROR, 864f95f3850SWill Newton &host->pending_events)) { 865f95f3850SWill Newton dw_mci_stop_dma(host); 866f95f3850SWill Newton if (data->stop) 867f95f3850SWill Newton send_stop_cmd(host, data); 868f95f3850SWill Newton state = STATE_DATA_ERROR; 869f95f3850SWill Newton break; 870f95f3850SWill Newton } 871f95f3850SWill Newton 872f95f3850SWill Newton if (!test_and_clear_bit(EVENT_XFER_COMPLETE, 873f95f3850SWill Newton &host->pending_events)) 874f95f3850SWill Newton break; 875f95f3850SWill Newton 876f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->completed_events); 877f95f3850SWill Newton prev_state = state = STATE_DATA_BUSY; 878f95f3850SWill Newton /* fall through */ 879f95f3850SWill Newton 880f95f3850SWill Newton case STATE_DATA_BUSY: 881f95f3850SWill Newton if (!test_and_clear_bit(EVENT_DATA_COMPLETE, 882f95f3850SWill Newton &host->pending_events)) 883f95f3850SWill Newton break; 884f95f3850SWill Newton 885f95f3850SWill Newton host->data = NULL; 886f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->completed_events); 887f95f3850SWill Newton status = host->data_status; 888f95f3850SWill Newton 889f95f3850SWill Newton if (status & DW_MCI_DATA_ERROR_FLAGS) { 890f95f3850SWill Newton if (status & SDMMC_INT_DTO) { 891f95f3850SWill Newton dev_err(&host->pdev->dev, 892f95f3850SWill Newton "data timeout error\n"); 893f95f3850SWill Newton data->error = -ETIMEDOUT; 894f95f3850SWill Newton } else if (status & SDMMC_INT_DCRC) { 895f95f3850SWill Newton dev_err(&host->pdev->dev, 896f95f3850SWill Newton "data CRC error\n"); 897f95f3850SWill Newton data->error = -EILSEQ; 898f95f3850SWill Newton } else { 899f95f3850SWill Newton dev_err(&host->pdev->dev, 900f95f3850SWill Newton "data FIFO error " 901f95f3850SWill Newton "(status=%08x)\n", 902f95f3850SWill Newton status); 903f95f3850SWill Newton data->error = -EIO; 904f95f3850SWill Newton } 905f95f3850SWill Newton } else { 906f95f3850SWill Newton data->bytes_xfered = data->blocks * data->blksz; 907f95f3850SWill Newton data->error = 0; 908f95f3850SWill Newton } 909f95f3850SWill Newton 910f95f3850SWill Newton if (!data->stop) { 911f95f3850SWill Newton dw_mci_request_end(host, host->mrq); 912f95f3850SWill Newton goto unlock; 913f95f3850SWill Newton } 914f95f3850SWill Newton 915f95f3850SWill Newton prev_state = state = STATE_SENDING_STOP; 916f95f3850SWill Newton if (!data->error) 917f95f3850SWill Newton send_stop_cmd(host, data); 918f95f3850SWill Newton /* fall through */ 919f95f3850SWill Newton 920f95f3850SWill Newton case STATE_SENDING_STOP: 921f95f3850SWill Newton if (!test_and_clear_bit(EVENT_CMD_COMPLETE, 922f95f3850SWill Newton &host->pending_events)) 923f95f3850SWill Newton break; 924f95f3850SWill Newton 925f95f3850SWill Newton host->cmd = NULL; 926f95f3850SWill Newton dw_mci_command_complete(host, host->mrq->stop); 927f95f3850SWill Newton dw_mci_request_end(host, host->mrq); 928f95f3850SWill Newton goto unlock; 929f95f3850SWill Newton 930f95f3850SWill Newton case STATE_DATA_ERROR: 931f95f3850SWill Newton if (!test_and_clear_bit(EVENT_XFER_COMPLETE, 932f95f3850SWill Newton &host->pending_events)) 933f95f3850SWill Newton break; 934f95f3850SWill Newton 935f95f3850SWill Newton state = STATE_DATA_BUSY; 936f95f3850SWill Newton break; 937f95f3850SWill Newton } 938f95f3850SWill Newton } while (state != prev_state); 939f95f3850SWill Newton 940f95f3850SWill Newton host->state = state; 941f95f3850SWill Newton unlock: 942f95f3850SWill Newton spin_unlock(&host->lock); 943f95f3850SWill Newton 944f95f3850SWill Newton } 945f95f3850SWill Newton 946f95f3850SWill Newton static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) 947f95f3850SWill Newton { 948f95f3850SWill Newton u16 *pdata = (u16 *)buf; 949f95f3850SWill Newton 950f95f3850SWill Newton WARN_ON(cnt % 2 != 0); 951f95f3850SWill Newton 952f95f3850SWill Newton cnt = cnt >> 1; 953f95f3850SWill Newton while (cnt > 0) { 954f95f3850SWill Newton mci_writew(host, DATA, *pdata++); 955f95f3850SWill Newton cnt--; 956f95f3850SWill Newton } 957f95f3850SWill Newton } 958f95f3850SWill Newton 959f95f3850SWill Newton static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) 960f95f3850SWill Newton { 961f95f3850SWill Newton u16 *pdata = (u16 *)buf; 962f95f3850SWill Newton 963f95f3850SWill Newton WARN_ON(cnt % 2 != 0); 964f95f3850SWill Newton 965f95f3850SWill Newton cnt = cnt >> 1; 966f95f3850SWill Newton while (cnt > 0) { 967f95f3850SWill Newton *pdata++ = mci_readw(host, DATA); 968f95f3850SWill Newton cnt--; 969f95f3850SWill Newton } 970f95f3850SWill Newton } 971f95f3850SWill Newton 972f95f3850SWill Newton static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) 973f95f3850SWill Newton { 974f95f3850SWill Newton u32 *pdata = (u32 *)buf; 975f95f3850SWill Newton 976f95f3850SWill Newton WARN_ON(cnt % 4 != 0); 977f95f3850SWill Newton WARN_ON((unsigned long)pdata & 0x3); 978f95f3850SWill Newton 979f95f3850SWill Newton cnt = cnt >> 2; 980f95f3850SWill Newton while (cnt > 0) { 981f95f3850SWill Newton mci_writel(host, DATA, *pdata++); 982f95f3850SWill Newton cnt--; 983f95f3850SWill Newton } 984f95f3850SWill Newton } 985f95f3850SWill Newton 986f95f3850SWill Newton static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) 987f95f3850SWill Newton { 988f95f3850SWill Newton u32 *pdata = (u32 *)buf; 989f95f3850SWill Newton 990f95f3850SWill Newton WARN_ON(cnt % 4 != 0); 991f95f3850SWill Newton WARN_ON((unsigned long)pdata & 0x3); 992f95f3850SWill Newton 993f95f3850SWill Newton cnt = cnt >> 2; 994f95f3850SWill Newton while (cnt > 0) { 995f95f3850SWill Newton *pdata++ = mci_readl(host, DATA); 996f95f3850SWill Newton cnt--; 997f95f3850SWill Newton } 998f95f3850SWill Newton } 999f95f3850SWill Newton 1000f95f3850SWill Newton static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) 1001f95f3850SWill Newton { 1002f95f3850SWill Newton u64 *pdata = (u64 *)buf; 1003f95f3850SWill Newton 1004f95f3850SWill Newton WARN_ON(cnt % 8 != 0); 1005f95f3850SWill Newton 1006f95f3850SWill Newton cnt = cnt >> 3; 1007f95f3850SWill Newton while (cnt > 0) { 1008f95f3850SWill Newton mci_writeq(host, DATA, *pdata++); 1009f95f3850SWill Newton cnt--; 1010f95f3850SWill Newton } 1011f95f3850SWill Newton } 1012f95f3850SWill Newton 1013f95f3850SWill Newton static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) 1014f95f3850SWill Newton { 1015f95f3850SWill Newton u64 *pdata = (u64 *)buf; 1016f95f3850SWill Newton 1017f95f3850SWill Newton WARN_ON(cnt % 8 != 0); 1018f95f3850SWill Newton 1019f95f3850SWill Newton cnt = cnt >> 3; 1020f95f3850SWill Newton while (cnt > 0) { 1021f95f3850SWill Newton *pdata++ = mci_readq(host, DATA); 1022f95f3850SWill Newton cnt--; 1023f95f3850SWill Newton } 1024f95f3850SWill Newton } 1025f95f3850SWill Newton 1026f95f3850SWill Newton static void dw_mci_read_data_pio(struct dw_mci *host) 1027f95f3850SWill Newton { 1028f95f3850SWill Newton struct scatterlist *sg = host->sg; 1029f95f3850SWill Newton void *buf = sg_virt(sg); 1030f95f3850SWill Newton unsigned int offset = host->pio_offset; 1031f95f3850SWill Newton struct mmc_data *data = host->data; 1032f95f3850SWill Newton int shift = host->data_shift; 1033f95f3850SWill Newton u32 status; 1034f95f3850SWill Newton unsigned int nbytes = 0, len, old_len, count = 0; 1035f95f3850SWill Newton 1036f95f3850SWill Newton do { 1037f95f3850SWill Newton len = SDMMC_GET_FCNT(mci_readl(host, STATUS)) << shift; 1038f95f3850SWill Newton if (count == 0) 1039f95f3850SWill Newton old_len = len; 1040f95f3850SWill Newton 1041f95f3850SWill Newton if (offset + len <= sg->length) { 1042f95f3850SWill Newton host->pull_data(host, (void *)(buf + offset), len); 1043f95f3850SWill Newton 1044f95f3850SWill Newton offset += len; 1045f95f3850SWill Newton nbytes += len; 1046f95f3850SWill Newton 1047f95f3850SWill Newton if (offset == sg->length) { 1048f95f3850SWill Newton flush_dcache_page(sg_page(sg)); 1049f95f3850SWill Newton host->sg = sg = sg_next(sg); 1050f95f3850SWill Newton if (!sg) 1051f95f3850SWill Newton goto done; 1052f95f3850SWill Newton 1053f95f3850SWill Newton offset = 0; 1054f95f3850SWill Newton buf = sg_virt(sg); 1055f95f3850SWill Newton } 1056f95f3850SWill Newton } else { 1057f95f3850SWill Newton unsigned int remaining = sg->length - offset; 1058f95f3850SWill Newton host->pull_data(host, (void *)(buf + offset), 1059f95f3850SWill Newton remaining); 1060f95f3850SWill Newton nbytes += remaining; 1061f95f3850SWill Newton 1062f95f3850SWill Newton flush_dcache_page(sg_page(sg)); 1063f95f3850SWill Newton host->sg = sg = sg_next(sg); 1064f95f3850SWill Newton if (!sg) 1065f95f3850SWill Newton goto done; 1066f95f3850SWill Newton 1067f95f3850SWill Newton offset = len - remaining; 1068f95f3850SWill Newton buf = sg_virt(sg); 1069f95f3850SWill Newton host->pull_data(host, buf, offset); 1070f95f3850SWill Newton nbytes += offset; 1071f95f3850SWill Newton } 1072f95f3850SWill Newton 1073f95f3850SWill Newton status = mci_readl(host, MINTSTS); 1074f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_RXDR); 1075f95f3850SWill Newton if (status & DW_MCI_DATA_ERROR_FLAGS) { 1076f95f3850SWill Newton host->data_status = status; 1077f95f3850SWill Newton data->bytes_xfered += nbytes; 1078f95f3850SWill Newton smp_wmb(); 1079f95f3850SWill Newton 1080f95f3850SWill Newton set_bit(EVENT_DATA_ERROR, &host->pending_events); 1081f95f3850SWill Newton 1082f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1083f95f3850SWill Newton return; 1084f95f3850SWill Newton } 1085f95f3850SWill Newton count++; 1086f95f3850SWill Newton } while (status & SDMMC_INT_RXDR); /*if the RXDR is ready read again*/ 1087f95f3850SWill Newton len = SDMMC_GET_FCNT(mci_readl(host, STATUS)); 1088f95f3850SWill Newton host->pio_offset = offset; 1089f95f3850SWill Newton data->bytes_xfered += nbytes; 1090f95f3850SWill Newton return; 1091f95f3850SWill Newton 1092f95f3850SWill Newton done: 1093f95f3850SWill Newton data->bytes_xfered += nbytes; 1094f95f3850SWill Newton smp_wmb(); 1095f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 1096f95f3850SWill Newton } 1097f95f3850SWill Newton 1098f95f3850SWill Newton static void dw_mci_write_data_pio(struct dw_mci *host) 1099f95f3850SWill Newton { 1100f95f3850SWill Newton struct scatterlist *sg = host->sg; 1101f95f3850SWill Newton void *buf = sg_virt(sg); 1102f95f3850SWill Newton unsigned int offset = host->pio_offset; 1103f95f3850SWill Newton struct mmc_data *data = host->data; 1104f95f3850SWill Newton int shift = host->data_shift; 1105f95f3850SWill Newton u32 status; 1106f95f3850SWill Newton unsigned int nbytes = 0, len; 1107f95f3850SWill Newton 1108f95f3850SWill Newton do { 1109f95f3850SWill Newton len = SDMMC_FIFO_SZ - 1110f95f3850SWill Newton (SDMMC_GET_FCNT(mci_readl(host, STATUS)) << shift); 1111f95f3850SWill Newton if (offset + len <= sg->length) { 1112f95f3850SWill Newton host->push_data(host, (void *)(buf + offset), len); 1113f95f3850SWill Newton 1114f95f3850SWill Newton offset += len; 1115f95f3850SWill Newton nbytes += len; 1116f95f3850SWill Newton if (offset == sg->length) { 1117f95f3850SWill Newton host->sg = sg = sg_next(sg); 1118f95f3850SWill Newton if (!sg) 1119f95f3850SWill Newton goto done; 1120f95f3850SWill Newton 1121f95f3850SWill Newton offset = 0; 1122f95f3850SWill Newton buf = sg_virt(sg); 1123f95f3850SWill Newton } 1124f95f3850SWill Newton } else { 1125f95f3850SWill Newton unsigned int remaining = sg->length - offset; 1126f95f3850SWill Newton 1127f95f3850SWill Newton host->push_data(host, (void *)(buf + offset), 1128f95f3850SWill Newton remaining); 1129f95f3850SWill Newton nbytes += remaining; 1130f95f3850SWill Newton 1131f95f3850SWill Newton host->sg = sg = sg_next(sg); 1132f95f3850SWill Newton if (!sg) 1133f95f3850SWill Newton goto done; 1134f95f3850SWill Newton 1135f95f3850SWill Newton offset = len - remaining; 1136f95f3850SWill Newton buf = sg_virt(sg); 1137f95f3850SWill Newton host->push_data(host, (void *)buf, offset); 1138f95f3850SWill Newton nbytes += offset; 1139f95f3850SWill Newton } 1140f95f3850SWill Newton 1141f95f3850SWill Newton status = mci_readl(host, MINTSTS); 1142f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_TXDR); 1143f95f3850SWill Newton if (status & DW_MCI_DATA_ERROR_FLAGS) { 1144f95f3850SWill Newton host->data_status = status; 1145f95f3850SWill Newton data->bytes_xfered += nbytes; 1146f95f3850SWill Newton 1147f95f3850SWill Newton smp_wmb(); 1148f95f3850SWill Newton 1149f95f3850SWill Newton set_bit(EVENT_DATA_ERROR, &host->pending_events); 1150f95f3850SWill Newton 1151f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1152f95f3850SWill Newton return; 1153f95f3850SWill Newton } 1154f95f3850SWill Newton } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ 1155f95f3850SWill Newton 1156f95f3850SWill Newton host->pio_offset = offset; 1157f95f3850SWill Newton data->bytes_xfered += nbytes; 1158f95f3850SWill Newton 1159f95f3850SWill Newton return; 1160f95f3850SWill Newton 1161f95f3850SWill Newton done: 1162f95f3850SWill Newton data->bytes_xfered += nbytes; 1163f95f3850SWill Newton smp_wmb(); 1164f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 1165f95f3850SWill Newton } 1166f95f3850SWill Newton 1167f95f3850SWill Newton static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) 1168f95f3850SWill Newton { 1169f95f3850SWill Newton if (!host->cmd_status) 1170f95f3850SWill Newton host->cmd_status = status; 1171f95f3850SWill Newton 1172f95f3850SWill Newton smp_wmb(); 1173f95f3850SWill Newton 1174f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->pending_events); 1175f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1176f95f3850SWill Newton } 1177f95f3850SWill Newton 1178f95f3850SWill Newton static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) 1179f95f3850SWill Newton { 1180f95f3850SWill Newton struct dw_mci *host = dev_id; 1181f95f3850SWill Newton u32 status, pending; 1182f95f3850SWill Newton unsigned int pass_count = 0; 1183f95f3850SWill Newton 1184f95f3850SWill Newton do { 1185f95f3850SWill Newton status = mci_readl(host, RINTSTS); 1186f95f3850SWill Newton pending = mci_readl(host, MINTSTS); /* read-only mask reg */ 1187f95f3850SWill Newton 1188f95f3850SWill Newton /* 1189f95f3850SWill Newton * DTO fix - version 2.10a and below, and only if internal DMA 1190f95f3850SWill Newton * is configured. 1191f95f3850SWill Newton */ 1192f95f3850SWill Newton if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) { 1193f95f3850SWill Newton if (!pending && 1194f95f3850SWill Newton ((mci_readl(host, STATUS) >> 17) & 0x1fff)) 1195f95f3850SWill Newton pending |= SDMMC_INT_DATA_OVER; 1196f95f3850SWill Newton } 1197f95f3850SWill Newton 1198f95f3850SWill Newton if (!pending) 1199f95f3850SWill Newton break; 1200f95f3850SWill Newton 1201f95f3850SWill Newton if (pending & DW_MCI_CMD_ERROR_FLAGS) { 1202f95f3850SWill Newton mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); 1203f95f3850SWill Newton host->cmd_status = status; 1204f95f3850SWill Newton smp_wmb(); 1205f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->pending_events); 1206f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1207f95f3850SWill Newton } 1208f95f3850SWill Newton 1209f95f3850SWill Newton if (pending & DW_MCI_DATA_ERROR_FLAGS) { 1210f95f3850SWill Newton /* if there is an error report DATA_ERROR */ 1211f95f3850SWill Newton mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); 1212f95f3850SWill Newton host->data_status = status; 1213f95f3850SWill Newton smp_wmb(); 1214f95f3850SWill Newton set_bit(EVENT_DATA_ERROR, &host->pending_events); 1215f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1216f95f3850SWill Newton } 1217f95f3850SWill Newton 1218f95f3850SWill Newton if (pending & SDMMC_INT_DATA_OVER) { 1219f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); 1220f95f3850SWill Newton if (!host->data_status) 1221f95f3850SWill Newton host->data_status = status; 1222f95f3850SWill Newton smp_wmb(); 1223f95f3850SWill Newton if (host->dir_status == DW_MCI_RECV_STATUS) { 1224f95f3850SWill Newton if (host->sg != NULL) 1225f95f3850SWill Newton dw_mci_read_data_pio(host); 1226f95f3850SWill Newton } 1227f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->pending_events); 1228f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1229f95f3850SWill Newton } 1230f95f3850SWill Newton 1231f95f3850SWill Newton if (pending & SDMMC_INT_RXDR) { 1232f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_RXDR); 1233f95f3850SWill Newton if (host->sg) 1234f95f3850SWill Newton dw_mci_read_data_pio(host); 1235f95f3850SWill Newton } 1236f95f3850SWill Newton 1237f95f3850SWill Newton if (pending & SDMMC_INT_TXDR) { 1238f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_TXDR); 1239f95f3850SWill Newton if (host->sg) 1240f95f3850SWill Newton dw_mci_write_data_pio(host); 1241f95f3850SWill Newton } 1242f95f3850SWill Newton 1243f95f3850SWill Newton if (pending & SDMMC_INT_CMD_DONE) { 1244f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); 1245f95f3850SWill Newton dw_mci_cmd_interrupt(host, status); 1246f95f3850SWill Newton } 1247f95f3850SWill Newton 1248f95f3850SWill Newton if (pending & SDMMC_INT_CD) { 1249f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_CD); 1250f95f3850SWill Newton tasklet_schedule(&host->card_tasklet); 1251f95f3850SWill Newton } 1252f95f3850SWill Newton 1253f95f3850SWill Newton } while (pass_count++ < 5); 1254f95f3850SWill Newton 1255f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1256f95f3850SWill Newton /* Handle DMA interrupts */ 1257f95f3850SWill Newton pending = mci_readl(host, IDSTS); 1258f95f3850SWill Newton if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { 1259f95f3850SWill Newton mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI); 1260f95f3850SWill Newton mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); 1261f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->pending_events); 1262f95f3850SWill Newton host->dma_ops->complete(host); 1263f95f3850SWill Newton } 1264f95f3850SWill Newton #endif 1265f95f3850SWill Newton 1266f95f3850SWill Newton return IRQ_HANDLED; 1267f95f3850SWill Newton } 1268f95f3850SWill Newton 1269f95f3850SWill Newton static void dw_mci_tasklet_card(unsigned long data) 1270f95f3850SWill Newton { 1271f95f3850SWill Newton struct dw_mci *host = (struct dw_mci *)data; 1272f95f3850SWill Newton int i; 1273f95f3850SWill Newton 1274f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 1275f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 1276f95f3850SWill Newton struct mmc_host *mmc = slot->mmc; 1277f95f3850SWill Newton struct mmc_request *mrq; 1278f95f3850SWill Newton int present; 1279f95f3850SWill Newton u32 ctrl; 1280f95f3850SWill Newton 1281f95f3850SWill Newton present = dw_mci_get_cd(mmc); 1282f95f3850SWill Newton while (present != slot->last_detect_state) { 1283f95f3850SWill Newton spin_lock(&host->lock); 1284f95f3850SWill Newton 1285f95f3850SWill Newton dev_dbg(&slot->mmc->class_dev, "card %s\n", 1286f95f3850SWill Newton present ? "inserted" : "removed"); 1287f95f3850SWill Newton 1288f95f3850SWill Newton /* Card change detected */ 1289f95f3850SWill Newton slot->last_detect_state = present; 1290f95f3850SWill Newton 1291f95f3850SWill Newton /* Power up slot */ 1292f95f3850SWill Newton if (present != 0) { 1293f95f3850SWill Newton if (host->pdata->setpower) 1294f95f3850SWill Newton host->pdata->setpower(slot->id, 1295f95f3850SWill Newton mmc->ocr_avail); 1296f95f3850SWill Newton 1297f95f3850SWill Newton set_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1298f95f3850SWill Newton } 1299f95f3850SWill Newton 1300f95f3850SWill Newton /* Clean up queue if present */ 1301f95f3850SWill Newton mrq = slot->mrq; 1302f95f3850SWill Newton if (mrq) { 1303f95f3850SWill Newton if (mrq == host->mrq) { 1304f95f3850SWill Newton host->data = NULL; 1305f95f3850SWill Newton host->cmd = NULL; 1306f95f3850SWill Newton 1307f95f3850SWill Newton switch (host->state) { 1308f95f3850SWill Newton case STATE_IDLE: 1309f95f3850SWill Newton break; 1310f95f3850SWill Newton case STATE_SENDING_CMD: 1311f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 1312f95f3850SWill Newton if (!mrq->data) 1313f95f3850SWill Newton break; 1314f95f3850SWill Newton /* fall through */ 1315f95f3850SWill Newton case STATE_SENDING_DATA: 1316f95f3850SWill Newton mrq->data->error = -ENOMEDIUM; 1317f95f3850SWill Newton dw_mci_stop_dma(host); 1318f95f3850SWill Newton break; 1319f95f3850SWill Newton case STATE_DATA_BUSY: 1320f95f3850SWill Newton case STATE_DATA_ERROR: 1321f95f3850SWill Newton if (mrq->data->error == -EINPROGRESS) 1322f95f3850SWill Newton mrq->data->error = -ENOMEDIUM; 1323f95f3850SWill Newton if (!mrq->stop) 1324f95f3850SWill Newton break; 1325f95f3850SWill Newton /* fall through */ 1326f95f3850SWill Newton case STATE_SENDING_STOP: 1327f95f3850SWill Newton mrq->stop->error = -ENOMEDIUM; 1328f95f3850SWill Newton break; 1329f95f3850SWill Newton } 1330f95f3850SWill Newton 1331f95f3850SWill Newton dw_mci_request_end(host, mrq); 1332f95f3850SWill Newton } else { 1333f95f3850SWill Newton list_del(&slot->queue_node); 1334f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 1335f95f3850SWill Newton if (mrq->data) 1336f95f3850SWill Newton mrq->data->error = -ENOMEDIUM; 1337f95f3850SWill Newton if (mrq->stop) 1338f95f3850SWill Newton mrq->stop->error = -ENOMEDIUM; 1339f95f3850SWill Newton 1340f95f3850SWill Newton spin_unlock(&host->lock); 1341f95f3850SWill Newton mmc_request_done(slot->mmc, mrq); 1342f95f3850SWill Newton spin_lock(&host->lock); 1343f95f3850SWill Newton } 1344f95f3850SWill Newton } 1345f95f3850SWill Newton 1346f95f3850SWill Newton /* Power down slot */ 1347f95f3850SWill Newton if (present == 0) { 1348f95f3850SWill Newton if (host->pdata->setpower) 1349f95f3850SWill Newton host->pdata->setpower(slot->id, 0); 1350f95f3850SWill Newton clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1351f95f3850SWill Newton 1352f95f3850SWill Newton /* 1353f95f3850SWill Newton * Clear down the FIFO - doing so generates a 1354f95f3850SWill Newton * block interrupt, hence setting the 1355f95f3850SWill Newton * scatter-gather pointer to NULL. 1356f95f3850SWill Newton */ 1357f95f3850SWill Newton host->sg = NULL; 1358f95f3850SWill Newton 1359f95f3850SWill Newton ctrl = mci_readl(host, CTRL); 1360f95f3850SWill Newton ctrl |= SDMMC_CTRL_FIFO_RESET; 1361f95f3850SWill Newton mci_writel(host, CTRL, ctrl); 1362f95f3850SWill Newton 1363f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1364f95f3850SWill Newton ctrl = mci_readl(host, BMOD); 1365f95f3850SWill Newton ctrl |= 0x01; /* Software reset of DMA */ 1366f95f3850SWill Newton mci_writel(host, BMOD, ctrl); 1367f95f3850SWill Newton #endif 1368f95f3850SWill Newton 1369f95f3850SWill Newton } 1370f95f3850SWill Newton 1371f95f3850SWill Newton spin_unlock(&host->lock); 1372f95f3850SWill Newton present = dw_mci_get_cd(mmc); 1373f95f3850SWill Newton } 1374f95f3850SWill Newton 1375f95f3850SWill Newton mmc_detect_change(slot->mmc, 1376f95f3850SWill Newton msecs_to_jiffies(host->pdata->detect_delay_ms)); 1377f95f3850SWill Newton } 1378f95f3850SWill Newton } 1379f95f3850SWill Newton 1380f95f3850SWill Newton static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id) 1381f95f3850SWill Newton { 1382f95f3850SWill Newton struct mmc_host *mmc; 1383f95f3850SWill Newton struct dw_mci_slot *slot; 1384f95f3850SWill Newton 1385f95f3850SWill Newton mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), &host->pdev->dev); 1386f95f3850SWill Newton if (!mmc) 1387f95f3850SWill Newton return -ENOMEM; 1388f95f3850SWill Newton 1389f95f3850SWill Newton slot = mmc_priv(mmc); 1390f95f3850SWill Newton slot->id = id; 1391f95f3850SWill Newton slot->mmc = mmc; 1392f95f3850SWill Newton slot->host = host; 1393f95f3850SWill Newton 1394f95f3850SWill Newton mmc->ops = &dw_mci_ops; 1395f95f3850SWill Newton mmc->f_min = DIV_ROUND_UP(host->bus_hz, 510); 1396f95f3850SWill Newton mmc->f_max = host->bus_hz; 1397f95f3850SWill Newton 1398f95f3850SWill Newton if (host->pdata->get_ocr) 1399f95f3850SWill Newton mmc->ocr_avail = host->pdata->get_ocr(id); 1400f95f3850SWill Newton else 1401f95f3850SWill Newton mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1402f95f3850SWill Newton 1403f95f3850SWill Newton /* 1404f95f3850SWill Newton * Start with slot power disabled, it will be enabled when a card 1405f95f3850SWill Newton * is detected. 1406f95f3850SWill Newton */ 1407f95f3850SWill Newton if (host->pdata->setpower) 1408f95f3850SWill Newton host->pdata->setpower(id, 0); 1409f95f3850SWill Newton 1410f95f3850SWill Newton mmc->caps = 0; 1411f95f3850SWill Newton if (host->pdata->get_bus_wd) 1412f95f3850SWill Newton if (host->pdata->get_bus_wd(slot->id) >= 4) 1413f95f3850SWill Newton mmc->caps |= MMC_CAP_4_BIT_DATA; 1414f95f3850SWill Newton 1415f95f3850SWill Newton if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED) 1416f95f3850SWill Newton mmc->caps |= MMC_CAP_SD_HIGHSPEED; 1417f95f3850SWill Newton 1418f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1419f95f3850SWill Newton mmc->max_segs = host->ring_size; 1420f95f3850SWill Newton mmc->max_blk_size = 65536; 1421f95f3850SWill Newton mmc->max_blk_count = host->ring_size; 1422f95f3850SWill Newton mmc->max_seg_size = 0x1000; 1423f95f3850SWill Newton mmc->max_req_size = mmc->max_seg_size * mmc->max_blk_count; 1424f95f3850SWill Newton #else 1425f95f3850SWill Newton if (host->pdata->blk_settings) { 1426f95f3850SWill Newton mmc->max_segs = host->pdata->blk_settings->max_segs; 1427f95f3850SWill Newton mmc->max_blk_size = host->pdata->blk_settings->max_blk_size; 1428f95f3850SWill Newton mmc->max_blk_count = host->pdata->blk_settings->max_blk_count; 1429f95f3850SWill Newton mmc->max_req_size = host->pdata->blk_settings->max_req_size; 1430f95f3850SWill Newton mmc->max_seg_size = host->pdata->blk_settings->max_seg_size; 1431f95f3850SWill Newton } else { 1432f95f3850SWill Newton /* Useful defaults if platform data is unset. */ 1433f95f3850SWill Newton mmc->max_segs = 64; 1434f95f3850SWill Newton mmc->max_blk_size = 65536; /* BLKSIZ is 16 bits */ 1435f95f3850SWill Newton mmc->max_blk_count = 512; 1436f95f3850SWill Newton mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 1437f95f3850SWill Newton mmc->max_seg_size = mmc->max_req_size; 1438f95f3850SWill Newton } 1439f95f3850SWill Newton #endif /* CONFIG_MMC_DW_IDMAC */ 1440f95f3850SWill Newton 1441f95f3850SWill Newton if (dw_mci_get_cd(mmc)) 1442f95f3850SWill Newton set_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1443f95f3850SWill Newton else 1444f95f3850SWill Newton clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1445f95f3850SWill Newton 1446f95f3850SWill Newton host->slot[id] = slot; 1447f95f3850SWill Newton mmc_add_host(mmc); 1448f95f3850SWill Newton 1449f95f3850SWill Newton #if defined(CONFIG_DEBUG_FS) 1450f95f3850SWill Newton dw_mci_init_debugfs(slot); 1451f95f3850SWill Newton #endif 1452f95f3850SWill Newton 1453f95f3850SWill Newton /* Card initially undetected */ 1454f95f3850SWill Newton slot->last_detect_state = 0; 1455f95f3850SWill Newton 1456dd6c4b98SWill Newton /* 1457dd6c4b98SWill Newton * Card may have been plugged in prior to boot so we 1458dd6c4b98SWill Newton * need to run the detect tasklet 1459dd6c4b98SWill Newton */ 1460dd6c4b98SWill Newton tasklet_schedule(&host->card_tasklet); 1461dd6c4b98SWill Newton 1462f95f3850SWill Newton return 0; 1463f95f3850SWill Newton } 1464f95f3850SWill Newton 1465f95f3850SWill Newton static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) 1466f95f3850SWill Newton { 1467f95f3850SWill Newton /* Shutdown detect IRQ */ 1468f95f3850SWill Newton if (slot->host->pdata->exit) 1469f95f3850SWill Newton slot->host->pdata->exit(id); 1470f95f3850SWill Newton 1471f95f3850SWill Newton /* Debugfs stuff is cleaned up by mmc core */ 1472f95f3850SWill Newton mmc_remove_host(slot->mmc); 1473f95f3850SWill Newton slot->host->slot[id] = NULL; 1474f95f3850SWill Newton mmc_free_host(slot->mmc); 1475f95f3850SWill Newton } 1476f95f3850SWill Newton 1477f95f3850SWill Newton static void dw_mci_init_dma(struct dw_mci *host) 1478f95f3850SWill Newton { 1479f95f3850SWill Newton /* Alloc memory for sg translation */ 1480f95f3850SWill Newton host->sg_cpu = dma_alloc_coherent(&host->pdev->dev, PAGE_SIZE, 1481f95f3850SWill Newton &host->sg_dma, GFP_KERNEL); 1482f95f3850SWill Newton if (!host->sg_cpu) { 1483f95f3850SWill Newton dev_err(&host->pdev->dev, "%s: could not alloc DMA memory\n", 1484f95f3850SWill Newton __func__); 1485f95f3850SWill Newton goto no_dma; 1486f95f3850SWill Newton } 1487f95f3850SWill Newton 1488f95f3850SWill Newton /* Determine which DMA interface to use */ 1489f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1490f95f3850SWill Newton host->dma_ops = &dw_mci_idmac_ops; 1491f95f3850SWill Newton dev_info(&host->pdev->dev, "Using internal DMA controller.\n"); 1492f95f3850SWill Newton #endif 1493f95f3850SWill Newton 1494f95f3850SWill Newton if (!host->dma_ops) 1495f95f3850SWill Newton goto no_dma; 1496f95f3850SWill Newton 1497f95f3850SWill Newton if (host->dma_ops->init) { 1498f95f3850SWill Newton if (host->dma_ops->init(host)) { 1499f95f3850SWill Newton dev_err(&host->pdev->dev, "%s: Unable to initialize " 1500f95f3850SWill Newton "DMA Controller.\n", __func__); 1501f95f3850SWill Newton goto no_dma; 1502f95f3850SWill Newton } 1503f95f3850SWill Newton } else { 1504f95f3850SWill Newton dev_err(&host->pdev->dev, "DMA initialization not found.\n"); 1505f95f3850SWill Newton goto no_dma; 1506f95f3850SWill Newton } 1507f95f3850SWill Newton 1508f95f3850SWill Newton host->use_dma = 1; 1509f95f3850SWill Newton return; 1510f95f3850SWill Newton 1511f95f3850SWill Newton no_dma: 1512f95f3850SWill Newton dev_info(&host->pdev->dev, "Using PIO mode.\n"); 1513f95f3850SWill Newton host->use_dma = 0; 1514f95f3850SWill Newton return; 1515f95f3850SWill Newton } 1516f95f3850SWill Newton 1517f95f3850SWill Newton static bool mci_wait_reset(struct device *dev, struct dw_mci *host) 1518f95f3850SWill Newton { 1519f95f3850SWill Newton unsigned long timeout = jiffies + msecs_to_jiffies(500); 1520f95f3850SWill Newton unsigned int ctrl; 1521f95f3850SWill Newton 1522f95f3850SWill Newton mci_writel(host, CTRL, (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | 1523f95f3850SWill Newton SDMMC_CTRL_DMA_RESET)); 1524f95f3850SWill Newton 1525f95f3850SWill Newton /* wait till resets clear */ 1526f95f3850SWill Newton do { 1527f95f3850SWill Newton ctrl = mci_readl(host, CTRL); 1528f95f3850SWill Newton if (!(ctrl & (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | 1529f95f3850SWill Newton SDMMC_CTRL_DMA_RESET))) 1530f95f3850SWill Newton return true; 1531f95f3850SWill Newton } while (time_before(jiffies, timeout)); 1532f95f3850SWill Newton 1533f95f3850SWill Newton dev_err(dev, "Timeout resetting block (ctrl %#x)\n", ctrl); 1534f95f3850SWill Newton 1535f95f3850SWill Newton return false; 1536f95f3850SWill Newton } 1537f95f3850SWill Newton 1538f95f3850SWill Newton static int dw_mci_probe(struct platform_device *pdev) 1539f95f3850SWill Newton { 1540f95f3850SWill Newton struct dw_mci *host; 1541f95f3850SWill Newton struct resource *regs; 1542f95f3850SWill Newton struct dw_mci_board *pdata; 1543f95f3850SWill Newton int irq, ret, i, width; 1544f95f3850SWill Newton u32 fifo_size; 1545f95f3850SWill Newton 1546f95f3850SWill Newton regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1547f95f3850SWill Newton if (!regs) 1548f95f3850SWill Newton return -ENXIO; 1549f95f3850SWill Newton 1550f95f3850SWill Newton irq = platform_get_irq(pdev, 0); 1551f95f3850SWill Newton if (irq < 0) 1552f95f3850SWill Newton return irq; 1553f95f3850SWill Newton 1554f95f3850SWill Newton host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL); 1555f95f3850SWill Newton if (!host) 1556f95f3850SWill Newton return -ENOMEM; 1557f95f3850SWill Newton 1558f95f3850SWill Newton host->pdev = pdev; 1559f95f3850SWill Newton host->pdata = pdata = pdev->dev.platform_data; 1560f95f3850SWill Newton if (!pdata || !pdata->init) { 1561f95f3850SWill Newton dev_err(&pdev->dev, 1562f95f3850SWill Newton "Platform data must supply init function\n"); 1563f95f3850SWill Newton ret = -ENODEV; 1564f95f3850SWill Newton goto err_freehost; 1565f95f3850SWill Newton } 1566f95f3850SWill Newton 1567f95f3850SWill Newton if (!pdata->select_slot && pdata->num_slots > 1) { 1568f95f3850SWill Newton dev_err(&pdev->dev, 1569f95f3850SWill Newton "Platform data must supply select_slot function\n"); 1570f95f3850SWill Newton ret = -ENODEV; 1571f95f3850SWill Newton goto err_freehost; 1572f95f3850SWill Newton } 1573f95f3850SWill Newton 1574f95f3850SWill Newton if (!pdata->bus_hz) { 1575f95f3850SWill Newton dev_err(&pdev->dev, 1576f95f3850SWill Newton "Platform data must supply bus speed\n"); 1577f95f3850SWill Newton ret = -ENODEV; 1578f95f3850SWill Newton goto err_freehost; 1579f95f3850SWill Newton } 1580f95f3850SWill Newton 1581f95f3850SWill Newton host->bus_hz = pdata->bus_hz; 1582f95f3850SWill Newton host->quirks = pdata->quirks; 1583f95f3850SWill Newton 1584f95f3850SWill Newton spin_lock_init(&host->lock); 1585f95f3850SWill Newton INIT_LIST_HEAD(&host->queue); 1586f95f3850SWill Newton 1587f95f3850SWill Newton ret = -ENOMEM; 1588f95f3850SWill Newton host->regs = ioremap(regs->start, regs->end - regs->start + 1); 1589f95f3850SWill Newton if (!host->regs) 1590f95f3850SWill Newton goto err_freehost; 1591f95f3850SWill Newton 1592f95f3850SWill Newton host->dma_ops = pdata->dma_ops; 1593f95f3850SWill Newton dw_mci_init_dma(host); 1594f95f3850SWill Newton 1595f95f3850SWill Newton /* 1596f95f3850SWill Newton * Get the host data width - this assumes that HCON has been set with 1597f95f3850SWill Newton * the correct values. 1598f95f3850SWill Newton */ 1599f95f3850SWill Newton i = (mci_readl(host, HCON) >> 7) & 0x7; 1600f95f3850SWill Newton if (!i) { 1601f95f3850SWill Newton host->push_data = dw_mci_push_data16; 1602f95f3850SWill Newton host->pull_data = dw_mci_pull_data16; 1603f95f3850SWill Newton width = 16; 1604f95f3850SWill Newton host->data_shift = 1; 1605f95f3850SWill Newton } else if (i == 2) { 1606f95f3850SWill Newton host->push_data = dw_mci_push_data64; 1607f95f3850SWill Newton host->pull_data = dw_mci_pull_data64; 1608f95f3850SWill Newton width = 64; 1609f95f3850SWill Newton host->data_shift = 3; 1610f95f3850SWill Newton } else { 1611f95f3850SWill Newton /* Check for a reserved value, and warn if it is */ 1612f95f3850SWill Newton WARN((i != 1), 1613f95f3850SWill Newton "HCON reports a reserved host data width!\n" 1614f95f3850SWill Newton "Defaulting to 32-bit access.\n"); 1615f95f3850SWill Newton host->push_data = dw_mci_push_data32; 1616f95f3850SWill Newton host->pull_data = dw_mci_pull_data32; 1617f95f3850SWill Newton width = 32; 1618f95f3850SWill Newton host->data_shift = 2; 1619f95f3850SWill Newton } 1620f95f3850SWill Newton 1621f95f3850SWill Newton /* Reset all blocks */ 1622f95f3850SWill Newton if (!mci_wait_reset(&pdev->dev, host)) { 1623f95f3850SWill Newton ret = -ENODEV; 1624f95f3850SWill Newton goto err_dmaunmap; 1625f95f3850SWill Newton } 1626f95f3850SWill Newton 1627f95f3850SWill Newton /* Clear the interrupts for the host controller */ 1628f95f3850SWill Newton mci_writel(host, RINTSTS, 0xFFFFFFFF); 1629f95f3850SWill Newton mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ 1630f95f3850SWill Newton 1631f95f3850SWill Newton /* Put in max timeout */ 1632f95f3850SWill Newton mci_writel(host, TMOUT, 0xFFFFFFFF); 1633f95f3850SWill Newton 1634f95f3850SWill Newton /* 1635f95f3850SWill Newton * FIFO threshold settings RxMark = fifo_size / 2 - 1, 1636f95f3850SWill Newton * Tx Mark = fifo_size / 2 DMA Size = 8 1637f95f3850SWill Newton */ 1638f95f3850SWill Newton fifo_size = mci_readl(host, FIFOTH); 1639f95f3850SWill Newton fifo_size = (fifo_size >> 16) & 0x7ff; 1640f95f3850SWill Newton mci_writel(host, FIFOTH, ((0x2 << 28) | ((fifo_size/2 - 1) << 16) | 1641f95f3850SWill Newton ((fifo_size/2) << 0))); 1642f95f3850SWill Newton 1643f95f3850SWill Newton /* disable clock to CIU */ 1644f95f3850SWill Newton mci_writel(host, CLKENA, 0); 1645f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 1646f95f3850SWill Newton 1647f95f3850SWill Newton tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); 1648f95f3850SWill Newton tasklet_init(&host->card_tasklet, 1649f95f3850SWill Newton dw_mci_tasklet_card, (unsigned long)host); 1650f95f3850SWill Newton 1651f95f3850SWill Newton ret = request_irq(irq, dw_mci_interrupt, 0, "dw-mci", host); 1652f95f3850SWill Newton if (ret) 1653f95f3850SWill Newton goto err_dmaunmap; 1654f95f3850SWill Newton 1655f95f3850SWill Newton platform_set_drvdata(pdev, host); 1656f95f3850SWill Newton 1657f95f3850SWill Newton if (host->pdata->num_slots) 1658f95f3850SWill Newton host->num_slots = host->pdata->num_slots; 1659f95f3850SWill Newton else 1660f95f3850SWill Newton host->num_slots = ((mci_readl(host, HCON) >> 1) & 0x1F) + 1; 1661f95f3850SWill Newton 1662f95f3850SWill Newton /* We need at least one slot to succeed */ 1663f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 1664f95f3850SWill Newton ret = dw_mci_init_slot(host, i); 1665f95f3850SWill Newton if (ret) { 1666f95f3850SWill Newton ret = -ENODEV; 1667f95f3850SWill Newton goto err_init_slot; 1668f95f3850SWill Newton } 1669f95f3850SWill Newton } 1670f95f3850SWill Newton 1671f95f3850SWill Newton /* 1672f95f3850SWill Newton * Enable interrupts for command done, data over, data empty, card det, 1673f95f3850SWill Newton * receive ready and error such as transmit, receive timeout, crc error 1674f95f3850SWill Newton */ 1675f95f3850SWill Newton mci_writel(host, RINTSTS, 0xFFFFFFFF); 1676f95f3850SWill Newton mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | 1677f95f3850SWill Newton SDMMC_INT_TXDR | SDMMC_INT_RXDR | 1678f95f3850SWill Newton DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); 1679f95f3850SWill Newton mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */ 1680f95f3850SWill Newton 1681f95f3850SWill Newton dev_info(&pdev->dev, "DW MMC controller at irq %d, " 1682f95f3850SWill Newton "%d bit host data width\n", irq, width); 1683f95f3850SWill Newton if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) 1684f95f3850SWill Newton dev_info(&pdev->dev, "Internal DMAC interrupt fix enabled.\n"); 1685f95f3850SWill Newton 1686f95f3850SWill Newton return 0; 1687f95f3850SWill Newton 1688f95f3850SWill Newton err_init_slot: 1689f95f3850SWill Newton /* De-init any initialized slots */ 1690f95f3850SWill Newton while (i > 0) { 1691f95f3850SWill Newton if (host->slot[i]) 1692f95f3850SWill Newton dw_mci_cleanup_slot(host->slot[i], i); 1693f95f3850SWill Newton i--; 1694f95f3850SWill Newton } 1695f95f3850SWill Newton free_irq(irq, host); 1696f95f3850SWill Newton 1697f95f3850SWill Newton err_dmaunmap: 1698f95f3850SWill Newton if (host->use_dma && host->dma_ops->exit) 1699f95f3850SWill Newton host->dma_ops->exit(host); 1700f95f3850SWill Newton dma_free_coherent(&host->pdev->dev, PAGE_SIZE, 1701f95f3850SWill Newton host->sg_cpu, host->sg_dma); 1702f95f3850SWill Newton iounmap(host->regs); 1703f95f3850SWill Newton 1704f95f3850SWill Newton err_freehost: 1705f95f3850SWill Newton kfree(host); 1706f95f3850SWill Newton return ret; 1707f95f3850SWill Newton } 1708f95f3850SWill Newton 1709f95f3850SWill Newton static int __exit dw_mci_remove(struct platform_device *pdev) 1710f95f3850SWill Newton { 1711f95f3850SWill Newton struct dw_mci *host = platform_get_drvdata(pdev); 1712f95f3850SWill Newton int i; 1713f95f3850SWill Newton 1714f95f3850SWill Newton mci_writel(host, RINTSTS, 0xFFFFFFFF); 1715f95f3850SWill Newton mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ 1716f95f3850SWill Newton 1717f95f3850SWill Newton platform_set_drvdata(pdev, NULL); 1718f95f3850SWill Newton 1719f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 1720f95f3850SWill Newton dev_dbg(&pdev->dev, "remove slot %d\n", i); 1721f95f3850SWill Newton if (host->slot[i]) 1722f95f3850SWill Newton dw_mci_cleanup_slot(host->slot[i], i); 1723f95f3850SWill Newton } 1724f95f3850SWill Newton 1725f95f3850SWill Newton /* disable clock to CIU */ 1726f95f3850SWill Newton mci_writel(host, CLKENA, 0); 1727f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 1728f95f3850SWill Newton 1729f95f3850SWill Newton free_irq(platform_get_irq(pdev, 0), host); 1730f95f3850SWill Newton dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); 1731f95f3850SWill Newton 1732f95f3850SWill Newton if (host->use_dma && host->dma_ops->exit) 1733f95f3850SWill Newton host->dma_ops->exit(host); 1734f95f3850SWill Newton 1735f95f3850SWill Newton iounmap(host->regs); 1736f95f3850SWill Newton 1737f95f3850SWill Newton kfree(host); 1738f95f3850SWill Newton return 0; 1739f95f3850SWill Newton } 1740f95f3850SWill Newton 1741f95f3850SWill Newton #ifdef CONFIG_PM 1742f95f3850SWill Newton /* 1743f95f3850SWill Newton * TODO: we should probably disable the clock to the card in the suspend path. 1744f95f3850SWill Newton */ 1745f95f3850SWill Newton static int dw_mci_suspend(struct platform_device *pdev, pm_message_t mesg) 1746f95f3850SWill Newton { 1747f95f3850SWill Newton int i, ret; 1748f95f3850SWill Newton struct dw_mci *host = platform_get_drvdata(pdev); 1749f95f3850SWill Newton 1750f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 1751f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 1752f95f3850SWill Newton if (!slot) 1753f95f3850SWill Newton continue; 1754f95f3850SWill Newton ret = mmc_suspend_host(slot->mmc); 1755f95f3850SWill Newton if (ret < 0) { 1756f95f3850SWill Newton while (--i >= 0) { 1757f95f3850SWill Newton slot = host->slot[i]; 1758f95f3850SWill Newton if (slot) 1759f95f3850SWill Newton mmc_resume_host(host->slot[i]->mmc); 1760f95f3850SWill Newton } 1761f95f3850SWill Newton return ret; 1762f95f3850SWill Newton } 1763f95f3850SWill Newton } 1764f95f3850SWill Newton 1765f95f3850SWill Newton return 0; 1766f95f3850SWill Newton } 1767f95f3850SWill Newton 1768f95f3850SWill Newton static int dw_mci_resume(struct platform_device *pdev) 1769f95f3850SWill Newton { 1770f95f3850SWill Newton int i, ret; 1771f95f3850SWill Newton struct dw_mci *host = platform_get_drvdata(pdev); 1772f95f3850SWill Newton 1773f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 1774f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 1775f95f3850SWill Newton if (!slot) 1776f95f3850SWill Newton continue; 1777f95f3850SWill Newton ret = mmc_resume_host(host->slot[i]->mmc); 1778f95f3850SWill Newton if (ret < 0) 1779f95f3850SWill Newton return ret; 1780f95f3850SWill Newton } 1781f95f3850SWill Newton 1782f95f3850SWill Newton return 0; 1783f95f3850SWill Newton } 1784f95f3850SWill Newton #else 1785f95f3850SWill Newton #define dw_mci_suspend NULL 1786f95f3850SWill Newton #define dw_mci_resume NULL 1787f95f3850SWill Newton #endif /* CONFIG_PM */ 1788f95f3850SWill Newton 1789f95f3850SWill Newton static struct platform_driver dw_mci_driver = { 1790f95f3850SWill Newton .remove = __exit_p(dw_mci_remove), 1791f95f3850SWill Newton .suspend = dw_mci_suspend, 1792f95f3850SWill Newton .resume = dw_mci_resume, 1793f95f3850SWill Newton .driver = { 1794f95f3850SWill Newton .name = "dw_mmc", 1795f95f3850SWill Newton }, 1796f95f3850SWill Newton }; 1797f95f3850SWill Newton 1798f95f3850SWill Newton static int __init dw_mci_init(void) 1799f95f3850SWill Newton { 1800f95f3850SWill Newton return platform_driver_probe(&dw_mci_driver, dw_mci_probe); 1801f95f3850SWill Newton } 1802f95f3850SWill Newton 1803f95f3850SWill Newton static void __exit dw_mci_exit(void) 1804f95f3850SWill Newton { 1805f95f3850SWill Newton platform_driver_unregister(&dw_mci_driver); 1806f95f3850SWill Newton } 1807f95f3850SWill Newton 1808f95f3850SWill Newton module_init(dw_mci_init); 1809f95f3850SWill Newton module_exit(dw_mci_exit); 1810f95f3850SWill Newton 1811f95f3850SWill Newton MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 1812f95f3850SWill Newton MODULE_AUTHOR("NXP Semiconductor VietNam"); 1813f95f3850SWill Newton MODULE_AUTHOR("Imagination Technologies Ltd"); 1814f95f3850SWill Newton MODULE_LICENSE("GPL v2"); 1815