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> 35c07946a3SJaehoon Chung #include <linux/regulator/consumer.h> 361791b13eSJames Hogan #include <linux/workqueue.h> 37f95f3850SWill Newton 38f95f3850SWill Newton #include "dw_mmc.h" 39f95f3850SWill Newton 40f95f3850SWill Newton /* Common flag combinations */ 41f95f3850SWill Newton #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DTO | SDMMC_INT_DCRC | \ 42f95f3850SWill Newton SDMMC_INT_HTO | SDMMC_INT_SBE | \ 43f95f3850SWill Newton SDMMC_INT_EBE) 44f95f3850SWill Newton #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \ 45f95f3850SWill Newton SDMMC_INT_RESP_ERR) 46f95f3850SWill Newton #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \ 47f95f3850SWill Newton DW_MCI_CMD_ERROR_FLAGS | SDMMC_INT_HLE) 48f95f3850SWill Newton #define DW_MCI_SEND_STATUS 1 49f95f3850SWill Newton #define DW_MCI_RECV_STATUS 2 50f95f3850SWill Newton #define DW_MCI_DMA_THRESHOLD 16 51f95f3850SWill Newton 52f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 53f95f3850SWill Newton struct idmac_desc { 54f95f3850SWill Newton u32 des0; /* Control Descriptor */ 55f95f3850SWill Newton #define IDMAC_DES0_DIC BIT(1) 56f95f3850SWill Newton #define IDMAC_DES0_LD BIT(2) 57f95f3850SWill Newton #define IDMAC_DES0_FD BIT(3) 58f95f3850SWill Newton #define IDMAC_DES0_CH BIT(4) 59f95f3850SWill Newton #define IDMAC_DES0_ER BIT(5) 60f95f3850SWill Newton #define IDMAC_DES0_CES BIT(30) 61f95f3850SWill Newton #define IDMAC_DES0_OWN BIT(31) 62f95f3850SWill Newton 63f95f3850SWill Newton u32 des1; /* Buffer sizes */ 64f95f3850SWill Newton #define IDMAC_SET_BUFFER1_SIZE(d, s) \ 659b7bbe10SShashidhar Hiremath ((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff)) 66f95f3850SWill Newton 67f95f3850SWill Newton u32 des2; /* buffer 1 physical address */ 68f95f3850SWill Newton 69f95f3850SWill Newton u32 des3; /* buffer 2 physical address */ 70f95f3850SWill Newton }; 71f95f3850SWill Newton #endif /* CONFIG_MMC_DW_IDMAC */ 72f95f3850SWill Newton 73f95f3850SWill Newton /** 74f95f3850SWill Newton * struct dw_mci_slot - MMC slot state 75f95f3850SWill Newton * @mmc: The mmc_host representing this slot. 76f95f3850SWill Newton * @host: The MMC controller this slot is using. 77f95f3850SWill Newton * @ctype: Card type for this slot. 78f95f3850SWill Newton * @mrq: mmc_request currently being processed or waiting to be 79f95f3850SWill Newton * processed, or NULL when the slot is idle. 80f95f3850SWill Newton * @queue_node: List node for placing this node in the @queue list of 81f95f3850SWill Newton * &struct dw_mci. 82f95f3850SWill Newton * @clock: Clock rate configured by set_ios(). Protected by host->lock. 83f95f3850SWill Newton * @flags: Random state bits associated with the slot. 84f95f3850SWill Newton * @id: Number of this slot. 85f95f3850SWill Newton * @last_detect_state: Most recently observed card detect state. 86f95f3850SWill Newton */ 87f95f3850SWill Newton struct dw_mci_slot { 88f95f3850SWill Newton struct mmc_host *mmc; 89f95f3850SWill Newton struct dw_mci *host; 90f95f3850SWill Newton 91f95f3850SWill Newton u32 ctype; 92f95f3850SWill Newton 93f95f3850SWill Newton struct mmc_request *mrq; 94f95f3850SWill Newton struct list_head queue_node; 95f95f3850SWill Newton 96f95f3850SWill Newton unsigned int clock; 97f95f3850SWill Newton unsigned long flags; 98f95f3850SWill Newton #define DW_MMC_CARD_PRESENT 0 99f95f3850SWill Newton #define DW_MMC_CARD_NEED_INIT 1 100f95f3850SWill Newton int id; 101f95f3850SWill Newton int last_detect_state; 102f95f3850SWill Newton }; 103f95f3850SWill Newton 1041791b13eSJames Hogan static struct workqueue_struct *dw_mci_card_workqueue; 1051791b13eSJames Hogan 106f95f3850SWill Newton #if defined(CONFIG_DEBUG_FS) 107f95f3850SWill Newton static int dw_mci_req_show(struct seq_file *s, void *v) 108f95f3850SWill Newton { 109f95f3850SWill Newton struct dw_mci_slot *slot = s->private; 110f95f3850SWill Newton struct mmc_request *mrq; 111f95f3850SWill Newton struct mmc_command *cmd; 112f95f3850SWill Newton struct mmc_command *stop; 113f95f3850SWill Newton struct mmc_data *data; 114f95f3850SWill Newton 115f95f3850SWill Newton /* Make sure we get a consistent snapshot */ 116f95f3850SWill Newton spin_lock_bh(&slot->host->lock); 117f95f3850SWill Newton mrq = slot->mrq; 118f95f3850SWill Newton 119f95f3850SWill Newton if (mrq) { 120f95f3850SWill Newton cmd = mrq->cmd; 121f95f3850SWill Newton data = mrq->data; 122f95f3850SWill Newton stop = mrq->stop; 123f95f3850SWill Newton 124f95f3850SWill Newton if (cmd) 125f95f3850SWill Newton seq_printf(s, 126f95f3850SWill Newton "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 127f95f3850SWill Newton cmd->opcode, cmd->arg, cmd->flags, 128f95f3850SWill Newton cmd->resp[0], cmd->resp[1], cmd->resp[2], 129f95f3850SWill Newton cmd->resp[2], cmd->error); 130f95f3850SWill Newton if (data) 131f95f3850SWill Newton seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", 132f95f3850SWill Newton data->bytes_xfered, data->blocks, 133f95f3850SWill Newton data->blksz, data->flags, data->error); 134f95f3850SWill Newton if (stop) 135f95f3850SWill Newton seq_printf(s, 136f95f3850SWill Newton "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 137f95f3850SWill Newton stop->opcode, stop->arg, stop->flags, 138f95f3850SWill Newton stop->resp[0], stop->resp[1], stop->resp[2], 139f95f3850SWill Newton stop->resp[2], stop->error); 140f95f3850SWill Newton } 141f95f3850SWill Newton 142f95f3850SWill Newton spin_unlock_bh(&slot->host->lock); 143f95f3850SWill Newton 144f95f3850SWill Newton return 0; 145f95f3850SWill Newton } 146f95f3850SWill Newton 147f95f3850SWill Newton static int dw_mci_req_open(struct inode *inode, struct file *file) 148f95f3850SWill Newton { 149f95f3850SWill Newton return single_open(file, dw_mci_req_show, inode->i_private); 150f95f3850SWill Newton } 151f95f3850SWill Newton 152f95f3850SWill Newton static const struct file_operations dw_mci_req_fops = { 153f95f3850SWill Newton .owner = THIS_MODULE, 154f95f3850SWill Newton .open = dw_mci_req_open, 155f95f3850SWill Newton .read = seq_read, 156f95f3850SWill Newton .llseek = seq_lseek, 157f95f3850SWill Newton .release = single_release, 158f95f3850SWill Newton }; 159f95f3850SWill Newton 160f95f3850SWill Newton static int dw_mci_regs_show(struct seq_file *s, void *v) 161f95f3850SWill Newton { 162f95f3850SWill Newton seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); 163f95f3850SWill Newton seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); 164f95f3850SWill Newton seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); 165f95f3850SWill Newton seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); 166f95f3850SWill Newton seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); 167f95f3850SWill Newton seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); 168f95f3850SWill Newton 169f95f3850SWill Newton return 0; 170f95f3850SWill Newton } 171f95f3850SWill Newton 172f95f3850SWill Newton static int dw_mci_regs_open(struct inode *inode, struct file *file) 173f95f3850SWill Newton { 174f95f3850SWill Newton return single_open(file, dw_mci_regs_show, inode->i_private); 175f95f3850SWill Newton } 176f95f3850SWill Newton 177f95f3850SWill Newton static const struct file_operations dw_mci_regs_fops = { 178f95f3850SWill Newton .owner = THIS_MODULE, 179f95f3850SWill Newton .open = dw_mci_regs_open, 180f95f3850SWill Newton .read = seq_read, 181f95f3850SWill Newton .llseek = seq_lseek, 182f95f3850SWill Newton .release = single_release, 183f95f3850SWill Newton }; 184f95f3850SWill Newton 185f95f3850SWill Newton static void dw_mci_init_debugfs(struct dw_mci_slot *slot) 186f95f3850SWill Newton { 187f95f3850SWill Newton struct mmc_host *mmc = slot->mmc; 188f95f3850SWill Newton struct dw_mci *host = slot->host; 189f95f3850SWill Newton struct dentry *root; 190f95f3850SWill Newton struct dentry *node; 191f95f3850SWill Newton 192f95f3850SWill Newton root = mmc->debugfs_root; 193f95f3850SWill Newton if (!root) 194f95f3850SWill Newton return; 195f95f3850SWill Newton 196f95f3850SWill Newton node = debugfs_create_file("regs", S_IRUSR, root, host, 197f95f3850SWill Newton &dw_mci_regs_fops); 198f95f3850SWill Newton if (!node) 199f95f3850SWill Newton goto err; 200f95f3850SWill Newton 201f95f3850SWill Newton node = debugfs_create_file("req", S_IRUSR, root, slot, 202f95f3850SWill Newton &dw_mci_req_fops); 203f95f3850SWill Newton if (!node) 204f95f3850SWill Newton goto err; 205f95f3850SWill Newton 206f95f3850SWill Newton node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); 207f95f3850SWill Newton if (!node) 208f95f3850SWill Newton goto err; 209f95f3850SWill Newton 210f95f3850SWill Newton node = debugfs_create_x32("pending_events", S_IRUSR, root, 211f95f3850SWill Newton (u32 *)&host->pending_events); 212f95f3850SWill Newton if (!node) 213f95f3850SWill Newton goto err; 214f95f3850SWill Newton 215f95f3850SWill Newton node = debugfs_create_x32("completed_events", S_IRUSR, root, 216f95f3850SWill Newton (u32 *)&host->completed_events); 217f95f3850SWill Newton if (!node) 218f95f3850SWill Newton goto err; 219f95f3850SWill Newton 220f95f3850SWill Newton return; 221f95f3850SWill Newton 222f95f3850SWill Newton err: 223f95f3850SWill Newton dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); 224f95f3850SWill Newton } 225f95f3850SWill Newton #endif /* defined(CONFIG_DEBUG_FS) */ 226f95f3850SWill Newton 227f95f3850SWill Newton static void dw_mci_set_timeout(struct dw_mci *host) 228f95f3850SWill Newton { 229f95f3850SWill Newton /* timeout (maximum) */ 230f95f3850SWill Newton mci_writel(host, TMOUT, 0xffffffff); 231f95f3850SWill Newton } 232f95f3850SWill Newton 233f95f3850SWill Newton static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) 234f95f3850SWill Newton { 235f95f3850SWill Newton struct mmc_data *data; 236f95f3850SWill Newton u32 cmdr; 237f95f3850SWill Newton cmd->error = -EINPROGRESS; 238f95f3850SWill Newton 239f95f3850SWill Newton cmdr = cmd->opcode; 240f95f3850SWill Newton 241f95f3850SWill Newton if (cmdr == MMC_STOP_TRANSMISSION) 242f95f3850SWill Newton cmdr |= SDMMC_CMD_STOP; 243f95f3850SWill Newton else 244f95f3850SWill Newton cmdr |= SDMMC_CMD_PRV_DAT_WAIT; 245f95f3850SWill Newton 246f95f3850SWill Newton if (cmd->flags & MMC_RSP_PRESENT) { 247f95f3850SWill Newton /* We expect a response, so set this bit */ 248f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_EXP; 249f95f3850SWill Newton if (cmd->flags & MMC_RSP_136) 250f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_LONG; 251f95f3850SWill Newton } 252f95f3850SWill Newton 253f95f3850SWill Newton if (cmd->flags & MMC_RSP_CRC) 254f95f3850SWill Newton cmdr |= SDMMC_CMD_RESP_CRC; 255f95f3850SWill Newton 256f95f3850SWill Newton data = cmd->data; 257f95f3850SWill Newton if (data) { 258f95f3850SWill Newton cmdr |= SDMMC_CMD_DAT_EXP; 259f95f3850SWill Newton if (data->flags & MMC_DATA_STREAM) 260f95f3850SWill Newton cmdr |= SDMMC_CMD_STRM_MODE; 261f95f3850SWill Newton if (data->flags & MMC_DATA_WRITE) 262f95f3850SWill Newton cmdr |= SDMMC_CMD_DAT_WR; 263f95f3850SWill Newton } 264f95f3850SWill Newton 265f95f3850SWill Newton return cmdr; 266f95f3850SWill Newton } 267f95f3850SWill Newton 268f95f3850SWill Newton static void dw_mci_start_command(struct dw_mci *host, 269f95f3850SWill Newton struct mmc_command *cmd, u32 cmd_flags) 270f95f3850SWill Newton { 271f95f3850SWill Newton host->cmd = cmd; 272f95f3850SWill Newton dev_vdbg(&host->pdev->dev, 273f95f3850SWill Newton "start command: ARGR=0x%08x CMDR=0x%08x\n", 274f95f3850SWill Newton cmd->arg, cmd_flags); 275f95f3850SWill Newton 276f95f3850SWill Newton mci_writel(host, CMDARG, cmd->arg); 277f95f3850SWill Newton wmb(); 278f95f3850SWill Newton 279f95f3850SWill Newton mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); 280f95f3850SWill Newton } 281f95f3850SWill Newton 282f95f3850SWill Newton static void send_stop_cmd(struct dw_mci *host, struct mmc_data *data) 283f95f3850SWill Newton { 284f95f3850SWill Newton dw_mci_start_command(host, data->stop, host->stop_cmdr); 285f95f3850SWill Newton } 286f95f3850SWill Newton 287f95f3850SWill Newton /* DMA interface functions */ 288f95f3850SWill Newton static void dw_mci_stop_dma(struct dw_mci *host) 289f95f3850SWill Newton { 29003e8cb53SJames Hogan if (host->using_dma) { 291f95f3850SWill Newton host->dma_ops->stop(host); 292f95f3850SWill Newton host->dma_ops->cleanup(host); 293f95f3850SWill Newton } else { 294f95f3850SWill Newton /* Data transfer was stopped by the interrupt handler */ 295f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 296f95f3850SWill Newton } 297f95f3850SWill Newton } 298f95f3850SWill Newton 299f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 300f95f3850SWill Newton static void dw_mci_dma_cleanup(struct dw_mci *host) 301f95f3850SWill Newton { 302f95f3850SWill Newton struct mmc_data *data = host->data; 303f95f3850SWill Newton 304f95f3850SWill Newton if (data) 305f95f3850SWill Newton dma_unmap_sg(&host->pdev->dev, data->sg, data->sg_len, 306f95f3850SWill Newton ((data->flags & MMC_DATA_WRITE) 307f95f3850SWill Newton ? DMA_TO_DEVICE : DMA_FROM_DEVICE)); 308f95f3850SWill Newton } 309f95f3850SWill Newton 310f95f3850SWill Newton static void dw_mci_idmac_stop_dma(struct dw_mci *host) 311f95f3850SWill Newton { 312f95f3850SWill Newton u32 temp; 313f95f3850SWill Newton 314f95f3850SWill Newton /* Disable and reset the IDMAC interface */ 315f95f3850SWill Newton temp = mci_readl(host, CTRL); 316f95f3850SWill Newton temp &= ~SDMMC_CTRL_USE_IDMAC; 317f95f3850SWill Newton temp |= SDMMC_CTRL_DMA_RESET; 318f95f3850SWill Newton mci_writel(host, CTRL, temp); 319f95f3850SWill Newton 320f95f3850SWill Newton /* Stop the IDMAC running */ 321f95f3850SWill Newton temp = mci_readl(host, BMOD); 322a5289a43SJaehoon Chung temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB); 323f95f3850SWill Newton mci_writel(host, BMOD, temp); 324f95f3850SWill Newton } 325f95f3850SWill Newton 326f95f3850SWill Newton static void dw_mci_idmac_complete_dma(struct dw_mci *host) 327f95f3850SWill Newton { 328f95f3850SWill Newton struct mmc_data *data = host->data; 329f95f3850SWill Newton 330f95f3850SWill Newton dev_vdbg(&host->pdev->dev, "DMA complete\n"); 331f95f3850SWill Newton 332f95f3850SWill Newton host->dma_ops->cleanup(host); 333f95f3850SWill Newton 334f95f3850SWill Newton /* 335f95f3850SWill Newton * If the card was removed, data will be NULL. No point in trying to 336f95f3850SWill Newton * send the stop command or waiting for NBUSY in this case. 337f95f3850SWill Newton */ 338f95f3850SWill Newton if (data) { 339f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 340f95f3850SWill Newton tasklet_schedule(&host->tasklet); 341f95f3850SWill Newton } 342f95f3850SWill Newton } 343f95f3850SWill Newton 344f95f3850SWill Newton static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, 345f95f3850SWill Newton unsigned int sg_len) 346f95f3850SWill Newton { 347f95f3850SWill Newton int i; 348f95f3850SWill Newton struct idmac_desc *desc = host->sg_cpu; 349f95f3850SWill Newton 350f95f3850SWill Newton for (i = 0; i < sg_len; i++, desc++) { 351f95f3850SWill Newton unsigned int length = sg_dma_len(&data->sg[i]); 352f95f3850SWill Newton u32 mem_addr = sg_dma_address(&data->sg[i]); 353f95f3850SWill Newton 354f95f3850SWill Newton /* Set the OWN bit and disable interrupts for this descriptor */ 355f95f3850SWill Newton desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | IDMAC_DES0_CH; 356f95f3850SWill Newton 357f95f3850SWill Newton /* Buffer length */ 358f95f3850SWill Newton IDMAC_SET_BUFFER1_SIZE(desc, length); 359f95f3850SWill Newton 360f95f3850SWill Newton /* Physical address to DMA to/from */ 361f95f3850SWill Newton desc->des2 = mem_addr; 362f95f3850SWill Newton } 363f95f3850SWill Newton 364f95f3850SWill Newton /* Set first descriptor */ 365f95f3850SWill Newton desc = host->sg_cpu; 366f95f3850SWill Newton desc->des0 |= IDMAC_DES0_FD; 367f95f3850SWill Newton 368f95f3850SWill Newton /* Set last descriptor */ 369f95f3850SWill Newton desc = host->sg_cpu + (i - 1) * sizeof(struct idmac_desc); 370f95f3850SWill Newton desc->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); 371f95f3850SWill Newton desc->des0 |= IDMAC_DES0_LD; 372f95f3850SWill Newton 373f95f3850SWill Newton wmb(); 374f95f3850SWill Newton } 375f95f3850SWill Newton 376f95f3850SWill Newton static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) 377f95f3850SWill Newton { 378f95f3850SWill Newton u32 temp; 379f95f3850SWill Newton 380f95f3850SWill Newton dw_mci_translate_sglist(host, host->data, sg_len); 381f95f3850SWill Newton 382f95f3850SWill Newton /* Select IDMAC interface */ 383f95f3850SWill Newton temp = mci_readl(host, CTRL); 384f95f3850SWill Newton temp |= SDMMC_CTRL_USE_IDMAC; 385f95f3850SWill Newton mci_writel(host, CTRL, temp); 386f95f3850SWill Newton 387f95f3850SWill Newton wmb(); 388f95f3850SWill Newton 389f95f3850SWill Newton /* Enable the IDMAC */ 390f95f3850SWill Newton temp = mci_readl(host, BMOD); 391a5289a43SJaehoon Chung temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB; 392f95f3850SWill Newton mci_writel(host, BMOD, temp); 393f95f3850SWill Newton 394f95f3850SWill Newton /* Start it running */ 395f95f3850SWill Newton mci_writel(host, PLDMND, 1); 396f95f3850SWill Newton } 397f95f3850SWill Newton 398f95f3850SWill Newton static int dw_mci_idmac_init(struct dw_mci *host) 399f95f3850SWill Newton { 400f95f3850SWill Newton struct idmac_desc *p; 401f95f3850SWill Newton int i; 402f95f3850SWill Newton 403f95f3850SWill Newton /* Number of descriptors in the ring buffer */ 404f95f3850SWill Newton host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc); 405f95f3850SWill Newton 406f95f3850SWill Newton /* Forward link the descriptor list */ 407f95f3850SWill Newton for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++) 408f95f3850SWill Newton p->des3 = host->sg_dma + (sizeof(struct idmac_desc) * (i + 1)); 409f95f3850SWill Newton 410f95f3850SWill Newton /* Set the last descriptor as the end-of-ring descriptor */ 411f95f3850SWill Newton p->des3 = host->sg_dma; 412f95f3850SWill Newton p->des0 = IDMAC_DES0_ER; 413f95f3850SWill Newton 414f95f3850SWill Newton /* Mask out interrupts - get Tx & Rx complete only */ 415f95f3850SWill Newton mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | SDMMC_IDMAC_INT_RI | 416f95f3850SWill Newton SDMMC_IDMAC_INT_TI); 417f95f3850SWill Newton 418f95f3850SWill Newton /* Set the descriptor base address */ 419f95f3850SWill Newton mci_writel(host, DBADDR, host->sg_dma); 420f95f3850SWill Newton return 0; 421f95f3850SWill Newton } 422f95f3850SWill Newton 423f95f3850SWill Newton static struct dw_mci_dma_ops dw_mci_idmac_ops = { 424f95f3850SWill Newton .init = dw_mci_idmac_init, 425f95f3850SWill Newton .start = dw_mci_idmac_start_dma, 426f95f3850SWill Newton .stop = dw_mci_idmac_stop_dma, 427f95f3850SWill Newton .complete = dw_mci_idmac_complete_dma, 428f95f3850SWill Newton .cleanup = dw_mci_dma_cleanup, 429f95f3850SWill Newton }; 430f95f3850SWill Newton #endif /* CONFIG_MMC_DW_IDMAC */ 431f95f3850SWill Newton 432f95f3850SWill Newton static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) 433f95f3850SWill Newton { 434f95f3850SWill Newton struct scatterlist *sg; 435f95f3850SWill Newton unsigned int i, direction, sg_len; 436f95f3850SWill Newton u32 temp; 437f95f3850SWill Newton 43803e8cb53SJames Hogan host->using_dma = 0; 43903e8cb53SJames Hogan 440f95f3850SWill Newton /* If we don't have a channel, we can't do DMA */ 441f95f3850SWill Newton if (!host->use_dma) 442f95f3850SWill Newton return -ENODEV; 443f95f3850SWill Newton 444f95f3850SWill Newton /* 445f95f3850SWill Newton * We don't do DMA on "complex" transfers, i.e. with 446f95f3850SWill Newton * non-word-aligned buffers or lengths. Also, we don't bother 447f95f3850SWill Newton * with all the DMA setup overhead for short transfers. 448f95f3850SWill Newton */ 449f95f3850SWill Newton if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) 450f95f3850SWill Newton return -EINVAL; 451f95f3850SWill Newton if (data->blksz & 3) 452f95f3850SWill Newton return -EINVAL; 453f95f3850SWill Newton 454f95f3850SWill Newton for_each_sg(data->sg, sg, data->sg_len, i) { 455f95f3850SWill Newton if (sg->offset & 3 || sg->length & 3) 456f95f3850SWill Newton return -EINVAL; 457f95f3850SWill Newton } 458f95f3850SWill Newton 45903e8cb53SJames Hogan host->using_dma = 1; 46003e8cb53SJames Hogan 461f95f3850SWill Newton if (data->flags & MMC_DATA_READ) 462f95f3850SWill Newton direction = DMA_FROM_DEVICE; 463f95f3850SWill Newton else 464f95f3850SWill Newton direction = DMA_TO_DEVICE; 465f95f3850SWill Newton 466f95f3850SWill Newton sg_len = dma_map_sg(&host->pdev->dev, data->sg, data->sg_len, 467f95f3850SWill Newton direction); 468f95f3850SWill Newton 469f95f3850SWill Newton dev_vdbg(&host->pdev->dev, 470f95f3850SWill Newton "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", 471f95f3850SWill Newton (unsigned long)host->sg_cpu, (unsigned long)host->sg_dma, 472f95f3850SWill Newton sg_len); 473f95f3850SWill Newton 474f95f3850SWill Newton /* Enable the DMA interface */ 475f95f3850SWill Newton temp = mci_readl(host, CTRL); 476f95f3850SWill Newton temp |= SDMMC_CTRL_DMA_ENABLE; 477f95f3850SWill Newton mci_writel(host, CTRL, temp); 478f95f3850SWill Newton 479f95f3850SWill Newton /* Disable RX/TX IRQs, let DMA handle it */ 480f95f3850SWill Newton temp = mci_readl(host, INTMASK); 481f95f3850SWill Newton temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); 482f95f3850SWill Newton mci_writel(host, INTMASK, temp); 483f95f3850SWill Newton 484f95f3850SWill Newton host->dma_ops->start(host, sg_len); 485f95f3850SWill Newton 486f95f3850SWill Newton return 0; 487f95f3850SWill Newton } 488f95f3850SWill Newton 489f95f3850SWill Newton static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) 490f95f3850SWill Newton { 491f95f3850SWill Newton u32 temp; 492f95f3850SWill Newton 493f95f3850SWill Newton data->error = -EINPROGRESS; 494f95f3850SWill Newton 495f95f3850SWill Newton WARN_ON(host->data); 496f95f3850SWill Newton host->sg = NULL; 497f95f3850SWill Newton host->data = data; 498f95f3850SWill Newton 49955c5efbcSJames Hogan if (data->flags & MMC_DATA_READ) 50055c5efbcSJames Hogan host->dir_status = DW_MCI_RECV_STATUS; 50155c5efbcSJames Hogan else 50255c5efbcSJames Hogan host->dir_status = DW_MCI_SEND_STATUS; 50355c5efbcSJames Hogan 504f95f3850SWill Newton if (dw_mci_submit_data_dma(host, data)) { 505f95f3850SWill Newton host->sg = data->sg; 506f95f3850SWill Newton host->pio_offset = 0; 50734b664a2SJames Hogan host->part_buf_start = 0; 50834b664a2SJames Hogan host->part_buf_count = 0; 509f95f3850SWill Newton 510b40af3aaSJames Hogan mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR); 511f95f3850SWill Newton temp = mci_readl(host, INTMASK); 512f95f3850SWill Newton temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; 513f95f3850SWill Newton mci_writel(host, INTMASK, temp); 514f95f3850SWill Newton 515f95f3850SWill Newton temp = mci_readl(host, CTRL); 516f95f3850SWill Newton temp &= ~SDMMC_CTRL_DMA_ENABLE; 517f95f3850SWill Newton mci_writel(host, CTRL, temp); 518f95f3850SWill Newton } 519f95f3850SWill Newton } 520f95f3850SWill Newton 521f95f3850SWill Newton static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) 522f95f3850SWill Newton { 523f95f3850SWill Newton struct dw_mci *host = slot->host; 524f95f3850SWill Newton unsigned long timeout = jiffies + msecs_to_jiffies(500); 525f95f3850SWill Newton unsigned int cmd_status = 0; 526f95f3850SWill Newton 527f95f3850SWill Newton mci_writel(host, CMDARG, arg); 528f95f3850SWill Newton wmb(); 529f95f3850SWill Newton mci_writel(host, CMD, SDMMC_CMD_START | cmd); 530f95f3850SWill Newton 531f95f3850SWill Newton while (time_before(jiffies, timeout)) { 532f95f3850SWill Newton cmd_status = mci_readl(host, CMD); 533f95f3850SWill Newton if (!(cmd_status & SDMMC_CMD_START)) 534f95f3850SWill Newton return; 535f95f3850SWill Newton } 536f95f3850SWill Newton dev_err(&slot->mmc->class_dev, 537f95f3850SWill Newton "Timeout sending command (cmd %#x arg %#x status %#x)\n", 538f95f3850SWill Newton cmd, arg, cmd_status); 539f95f3850SWill Newton } 540f95f3850SWill Newton 541f95f3850SWill Newton static void dw_mci_setup_bus(struct dw_mci_slot *slot) 542f95f3850SWill Newton { 543f95f3850SWill Newton struct dw_mci *host = slot->host; 544f95f3850SWill Newton u32 div; 545f95f3850SWill Newton 546f95f3850SWill Newton if (slot->clock != host->current_speed) { 547f95f3850SWill Newton if (host->bus_hz % slot->clock) 548f95f3850SWill Newton /* 549f95f3850SWill Newton * move the + 1 after the divide to prevent 550f95f3850SWill Newton * over-clocking the card. 551f95f3850SWill Newton */ 552f95f3850SWill Newton div = ((host->bus_hz / slot->clock) >> 1) + 1; 553f95f3850SWill Newton else 554f95f3850SWill Newton div = (host->bus_hz / slot->clock) >> 1; 555f95f3850SWill Newton 556f95f3850SWill Newton dev_info(&slot->mmc->class_dev, 557f95f3850SWill Newton "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ" 558f95f3850SWill Newton " div = %d)\n", slot->id, host->bus_hz, slot->clock, 559f95f3850SWill Newton div ? ((host->bus_hz / div) >> 1) : host->bus_hz, div); 560f95f3850SWill Newton 561f95f3850SWill Newton /* disable clock */ 562f95f3850SWill Newton mci_writel(host, CLKENA, 0); 563f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 564f95f3850SWill Newton 565f95f3850SWill Newton /* inform CIU */ 566f95f3850SWill Newton mci_send_cmd(slot, 567f95f3850SWill Newton SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); 568f95f3850SWill Newton 569f95f3850SWill Newton /* set clock to desired speed */ 570f95f3850SWill Newton mci_writel(host, CLKDIV, div); 571f95f3850SWill Newton 572f95f3850SWill Newton /* inform CIU */ 573f95f3850SWill Newton mci_send_cmd(slot, 574f95f3850SWill Newton SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); 575f95f3850SWill Newton 576f95f3850SWill Newton /* enable clock */ 577aadb9f41SWill Newton mci_writel(host, CLKENA, SDMMC_CLKEN_ENABLE | 578aadb9f41SWill Newton SDMMC_CLKEN_LOW_PWR); 579f95f3850SWill Newton 580f95f3850SWill Newton /* inform CIU */ 581f95f3850SWill Newton mci_send_cmd(slot, 582f95f3850SWill Newton SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); 583f95f3850SWill Newton 584f95f3850SWill Newton host->current_speed = slot->clock; 585f95f3850SWill Newton } 586f95f3850SWill Newton 587f95f3850SWill Newton /* Set the current slot bus width */ 5881d56c453SSeungwon Jeon mci_writel(host, CTYPE, (slot->ctype << slot->id)); 589f95f3850SWill Newton } 590f95f3850SWill Newton 591*053b3ce6SSeungwon Jeon static void __dw_mci_start_request(struct dw_mci *host, 592*053b3ce6SSeungwon Jeon struct dw_mci_slot *slot, 593*053b3ce6SSeungwon Jeon struct mmc_command *cmd) 594f95f3850SWill Newton { 595f95f3850SWill Newton struct mmc_request *mrq; 596f95f3850SWill Newton struct mmc_data *data; 597f95f3850SWill Newton u32 cmdflags; 598f95f3850SWill Newton 599f95f3850SWill Newton mrq = slot->mrq; 600f95f3850SWill Newton if (host->pdata->select_slot) 601f95f3850SWill Newton host->pdata->select_slot(slot->id); 602f95f3850SWill Newton 603f95f3850SWill Newton /* Slot specific timing and width adjustment */ 604f95f3850SWill Newton dw_mci_setup_bus(slot); 605f95f3850SWill Newton 606f95f3850SWill Newton host->cur_slot = slot; 607f95f3850SWill Newton host->mrq = mrq; 608f95f3850SWill Newton 609f95f3850SWill Newton host->pending_events = 0; 610f95f3850SWill Newton host->completed_events = 0; 611f95f3850SWill Newton host->data_status = 0; 612f95f3850SWill Newton 613*053b3ce6SSeungwon Jeon data = cmd->data; 614f95f3850SWill Newton if (data) { 615f95f3850SWill Newton dw_mci_set_timeout(host); 616f95f3850SWill Newton mci_writel(host, BYTCNT, data->blksz*data->blocks); 617f95f3850SWill Newton mci_writel(host, BLKSIZ, data->blksz); 618f95f3850SWill Newton } 619f95f3850SWill Newton 620f95f3850SWill Newton cmdflags = dw_mci_prepare_command(slot->mmc, cmd); 621f95f3850SWill Newton 622f95f3850SWill Newton /* this is the first command, send the initialization clock */ 623f95f3850SWill Newton if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) 624f95f3850SWill Newton cmdflags |= SDMMC_CMD_INIT; 625f95f3850SWill Newton 626f95f3850SWill Newton if (data) { 627f95f3850SWill Newton dw_mci_submit_data(host, data); 628f95f3850SWill Newton wmb(); 629f95f3850SWill Newton } 630f95f3850SWill Newton 631f95f3850SWill Newton dw_mci_start_command(host, cmd, cmdflags); 632f95f3850SWill Newton 633f95f3850SWill Newton if (mrq->stop) 634f95f3850SWill Newton host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); 635f95f3850SWill Newton } 636f95f3850SWill Newton 637*053b3ce6SSeungwon Jeon static void dw_mci_start_request(struct dw_mci *host, 638*053b3ce6SSeungwon Jeon struct dw_mci_slot *slot) 639*053b3ce6SSeungwon Jeon { 640*053b3ce6SSeungwon Jeon struct mmc_request *mrq = slot->mrq; 641*053b3ce6SSeungwon Jeon struct mmc_command *cmd; 642*053b3ce6SSeungwon Jeon 643*053b3ce6SSeungwon Jeon cmd = mrq->sbc ? mrq->sbc : mrq->cmd; 644*053b3ce6SSeungwon Jeon __dw_mci_start_request(host, slot, cmd); 645*053b3ce6SSeungwon Jeon } 646*053b3ce6SSeungwon Jeon 6477456caaeSJames Hogan /* must be called with host->lock held */ 648f95f3850SWill Newton static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, 649f95f3850SWill Newton struct mmc_request *mrq) 650f95f3850SWill Newton { 651f95f3850SWill Newton dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", 652f95f3850SWill Newton host->state); 653f95f3850SWill Newton 654f95f3850SWill Newton slot->mrq = mrq; 655f95f3850SWill Newton 656f95f3850SWill Newton if (host->state == STATE_IDLE) { 657f95f3850SWill Newton host->state = STATE_SENDING_CMD; 658f95f3850SWill Newton dw_mci_start_request(host, slot); 659f95f3850SWill Newton } else { 660f95f3850SWill Newton list_add_tail(&slot->queue_node, &host->queue); 661f95f3850SWill Newton } 662f95f3850SWill Newton } 663f95f3850SWill Newton 664f95f3850SWill Newton static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) 665f95f3850SWill Newton { 666f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 667f95f3850SWill Newton struct dw_mci *host = slot->host; 668f95f3850SWill Newton 669f95f3850SWill Newton WARN_ON(slot->mrq); 670f95f3850SWill Newton 6717456caaeSJames Hogan /* 6727456caaeSJames Hogan * The check for card presence and queueing of the request must be 6737456caaeSJames Hogan * atomic, otherwise the card could be removed in between and the 6747456caaeSJames Hogan * request wouldn't fail until another card was inserted. 6757456caaeSJames Hogan */ 6767456caaeSJames Hogan spin_lock_bh(&host->lock); 6777456caaeSJames Hogan 678f95f3850SWill Newton if (!test_bit(DW_MMC_CARD_PRESENT, &slot->flags)) { 6797456caaeSJames Hogan spin_unlock_bh(&host->lock); 680f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 681f95f3850SWill Newton mmc_request_done(mmc, mrq); 682f95f3850SWill Newton return; 683f95f3850SWill Newton } 684f95f3850SWill Newton 685f95f3850SWill Newton dw_mci_queue_request(host, slot, mrq); 6867456caaeSJames Hogan 6877456caaeSJames Hogan spin_unlock_bh(&host->lock); 688f95f3850SWill Newton } 689f95f3850SWill Newton 690f95f3850SWill Newton static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 691f95f3850SWill Newton { 692f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 69341babf75SJaehoon Chung u32 regs; 694f95f3850SWill Newton 695f95f3850SWill Newton /* set default 1 bit mode */ 696f95f3850SWill Newton slot->ctype = SDMMC_CTYPE_1BIT; 697f95f3850SWill Newton 698f95f3850SWill Newton switch (ios->bus_width) { 699f95f3850SWill Newton case MMC_BUS_WIDTH_1: 700f95f3850SWill Newton slot->ctype = SDMMC_CTYPE_1BIT; 701f95f3850SWill Newton break; 702f95f3850SWill Newton case MMC_BUS_WIDTH_4: 703f95f3850SWill Newton slot->ctype = SDMMC_CTYPE_4BIT; 704f95f3850SWill Newton break; 705c9b2a06fSJaehoon Chung case MMC_BUS_WIDTH_8: 706c9b2a06fSJaehoon Chung slot->ctype = SDMMC_CTYPE_8BIT; 707c9b2a06fSJaehoon Chung break; 708f95f3850SWill Newton } 709f95f3850SWill Newton 71041babf75SJaehoon Chung /* DDR mode set */ 7116daa7778SSeungwon Jeon if (ios->timing == MMC_TIMING_UHS_DDR50) { 71241babf75SJaehoon Chung regs = mci_readl(slot->host, UHS_REG); 71341babf75SJaehoon Chung regs |= (0x1 << slot->id) << 16; 71441babf75SJaehoon Chung mci_writel(slot->host, UHS_REG, regs); 71541babf75SJaehoon Chung } 71641babf75SJaehoon Chung 717f95f3850SWill Newton if (ios->clock) { 718f95f3850SWill Newton /* 719f95f3850SWill Newton * Use mirror of ios->clock to prevent race with mmc 720f95f3850SWill Newton * core ios update when finding the minimum. 721f95f3850SWill Newton */ 722f95f3850SWill Newton slot->clock = ios->clock; 723f95f3850SWill Newton } 724f95f3850SWill Newton 725f95f3850SWill Newton switch (ios->power_mode) { 726f95f3850SWill Newton case MMC_POWER_UP: 727f95f3850SWill Newton set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); 728f95f3850SWill Newton break; 729f95f3850SWill Newton default: 730f95f3850SWill Newton break; 731f95f3850SWill Newton } 732f95f3850SWill Newton } 733f95f3850SWill Newton 734f95f3850SWill Newton static int dw_mci_get_ro(struct mmc_host *mmc) 735f95f3850SWill Newton { 736f95f3850SWill Newton int read_only; 737f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 738f95f3850SWill Newton struct dw_mci_board *brd = slot->host->pdata; 739f95f3850SWill Newton 740f95f3850SWill Newton /* Use platform get_ro function, else try on board write protect */ 741f95f3850SWill Newton if (brd->get_ro) 742f95f3850SWill Newton read_only = brd->get_ro(slot->id); 743f95f3850SWill Newton else 744f95f3850SWill Newton read_only = 745f95f3850SWill Newton mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; 746f95f3850SWill Newton 747f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is %s\n", 748f95f3850SWill Newton read_only ? "read-only" : "read-write"); 749f95f3850SWill Newton 750f95f3850SWill Newton return read_only; 751f95f3850SWill Newton } 752f95f3850SWill Newton 753f95f3850SWill Newton static int dw_mci_get_cd(struct mmc_host *mmc) 754f95f3850SWill Newton { 755f95f3850SWill Newton int present; 756f95f3850SWill Newton struct dw_mci_slot *slot = mmc_priv(mmc); 757f95f3850SWill Newton struct dw_mci_board *brd = slot->host->pdata; 758f95f3850SWill Newton 759f95f3850SWill Newton /* Use platform get_cd function, else try onboard card detect */ 760fc3d7720SJaehoon Chung if (brd->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION) 761fc3d7720SJaehoon Chung present = 1; 762fc3d7720SJaehoon Chung else if (brd->get_cd) 763f95f3850SWill Newton present = !brd->get_cd(slot->id); 764f95f3850SWill Newton else 765f95f3850SWill Newton present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) 766f95f3850SWill Newton == 0 ? 1 : 0; 767f95f3850SWill Newton 768f95f3850SWill Newton if (present) 769f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is present\n"); 770f95f3850SWill Newton else 771f95f3850SWill Newton dev_dbg(&mmc->class_dev, "card is not present\n"); 772f95f3850SWill Newton 773f95f3850SWill Newton return present; 774f95f3850SWill Newton } 775f95f3850SWill Newton 7761a5c8e1fSShashidhar Hiremath static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) 7771a5c8e1fSShashidhar Hiremath { 7781a5c8e1fSShashidhar Hiremath struct dw_mci_slot *slot = mmc_priv(mmc); 7791a5c8e1fSShashidhar Hiremath struct dw_mci *host = slot->host; 7801a5c8e1fSShashidhar Hiremath u32 int_mask; 7811a5c8e1fSShashidhar Hiremath 7821a5c8e1fSShashidhar Hiremath /* Enable/disable Slot Specific SDIO interrupt */ 7831a5c8e1fSShashidhar Hiremath int_mask = mci_readl(host, INTMASK); 7841a5c8e1fSShashidhar Hiremath if (enb) { 7851a5c8e1fSShashidhar Hiremath mci_writel(host, INTMASK, 7861a5c8e1fSShashidhar Hiremath (int_mask | (1 << SDMMC_INT_SDIO(slot->id)))); 7871a5c8e1fSShashidhar Hiremath } else { 7881a5c8e1fSShashidhar Hiremath mci_writel(host, INTMASK, 7891a5c8e1fSShashidhar Hiremath (int_mask & ~(1 << SDMMC_INT_SDIO(slot->id)))); 7901a5c8e1fSShashidhar Hiremath } 7911a5c8e1fSShashidhar Hiremath } 7921a5c8e1fSShashidhar Hiremath 793f95f3850SWill Newton static const struct mmc_host_ops dw_mci_ops = { 794f95f3850SWill Newton .request = dw_mci_request, 795f95f3850SWill Newton .set_ios = dw_mci_set_ios, 796f95f3850SWill Newton .get_ro = dw_mci_get_ro, 797f95f3850SWill Newton .get_cd = dw_mci_get_cd, 7981a5c8e1fSShashidhar Hiremath .enable_sdio_irq = dw_mci_enable_sdio_irq, 799f95f3850SWill Newton }; 800f95f3850SWill Newton 801f95f3850SWill Newton static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) 802f95f3850SWill Newton __releases(&host->lock) 803f95f3850SWill Newton __acquires(&host->lock) 804f95f3850SWill Newton { 805f95f3850SWill Newton struct dw_mci_slot *slot; 806f95f3850SWill Newton struct mmc_host *prev_mmc = host->cur_slot->mmc; 807f95f3850SWill Newton 808f95f3850SWill Newton WARN_ON(host->cmd || host->data); 809f95f3850SWill Newton 810f95f3850SWill Newton host->cur_slot->mrq = NULL; 811f95f3850SWill Newton host->mrq = NULL; 812f95f3850SWill Newton if (!list_empty(&host->queue)) { 813f95f3850SWill Newton slot = list_entry(host->queue.next, 814f95f3850SWill Newton struct dw_mci_slot, queue_node); 815f95f3850SWill Newton list_del(&slot->queue_node); 816f95f3850SWill Newton dev_vdbg(&host->pdev->dev, "list not empty: %s is next\n", 817f95f3850SWill Newton mmc_hostname(slot->mmc)); 818f95f3850SWill Newton host->state = STATE_SENDING_CMD; 819f95f3850SWill Newton dw_mci_start_request(host, slot); 820f95f3850SWill Newton } else { 821f95f3850SWill Newton dev_vdbg(&host->pdev->dev, "list empty\n"); 822f95f3850SWill Newton host->state = STATE_IDLE; 823f95f3850SWill Newton } 824f95f3850SWill Newton 825f95f3850SWill Newton spin_unlock(&host->lock); 826f95f3850SWill Newton mmc_request_done(prev_mmc, mrq); 827f95f3850SWill Newton spin_lock(&host->lock); 828f95f3850SWill Newton } 829f95f3850SWill Newton 830f95f3850SWill Newton static void dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) 831f95f3850SWill Newton { 832f95f3850SWill Newton u32 status = host->cmd_status; 833f95f3850SWill Newton 834f95f3850SWill Newton host->cmd_status = 0; 835f95f3850SWill Newton 836f95f3850SWill Newton /* Read the response from the card (up to 16 bytes) */ 837f95f3850SWill Newton if (cmd->flags & MMC_RSP_PRESENT) { 838f95f3850SWill Newton if (cmd->flags & MMC_RSP_136) { 839f95f3850SWill Newton cmd->resp[3] = mci_readl(host, RESP0); 840f95f3850SWill Newton cmd->resp[2] = mci_readl(host, RESP1); 841f95f3850SWill Newton cmd->resp[1] = mci_readl(host, RESP2); 842f95f3850SWill Newton cmd->resp[0] = mci_readl(host, RESP3); 843f95f3850SWill Newton } else { 844f95f3850SWill Newton cmd->resp[0] = mci_readl(host, RESP0); 845f95f3850SWill Newton cmd->resp[1] = 0; 846f95f3850SWill Newton cmd->resp[2] = 0; 847f95f3850SWill Newton cmd->resp[3] = 0; 848f95f3850SWill Newton } 849f95f3850SWill Newton } 850f95f3850SWill Newton 851f95f3850SWill Newton if (status & SDMMC_INT_RTO) 852f95f3850SWill Newton cmd->error = -ETIMEDOUT; 853f95f3850SWill Newton else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) 854f95f3850SWill Newton cmd->error = -EILSEQ; 855f95f3850SWill Newton else if (status & SDMMC_INT_RESP_ERR) 856f95f3850SWill Newton cmd->error = -EIO; 857f95f3850SWill Newton else 858f95f3850SWill Newton cmd->error = 0; 859f95f3850SWill Newton 860f95f3850SWill Newton if (cmd->error) { 861f95f3850SWill Newton /* newer ip versions need a delay between retries */ 862f95f3850SWill Newton if (host->quirks & DW_MCI_QUIRK_RETRY_DELAY) 863f95f3850SWill Newton mdelay(20); 864f95f3850SWill Newton 865f95f3850SWill Newton if (cmd->data) { 866f95f3850SWill Newton host->data = NULL; 867f95f3850SWill Newton dw_mci_stop_dma(host); 868f95f3850SWill Newton } 869f95f3850SWill Newton } 870f95f3850SWill Newton } 871f95f3850SWill Newton 872f95f3850SWill Newton static void dw_mci_tasklet_func(unsigned long priv) 873f95f3850SWill Newton { 874f95f3850SWill Newton struct dw_mci *host = (struct dw_mci *)priv; 875f95f3850SWill Newton struct mmc_data *data; 876f95f3850SWill Newton struct mmc_command *cmd; 877f95f3850SWill Newton enum dw_mci_state state; 878f95f3850SWill Newton enum dw_mci_state prev_state; 87994dd5b33SJames Hogan u32 status, ctrl; 880f95f3850SWill Newton 881f95f3850SWill Newton spin_lock(&host->lock); 882f95f3850SWill Newton 883f95f3850SWill Newton state = host->state; 884f95f3850SWill Newton data = host->data; 885f95f3850SWill Newton 886f95f3850SWill Newton do { 887f95f3850SWill Newton prev_state = state; 888f95f3850SWill Newton 889f95f3850SWill Newton switch (state) { 890f95f3850SWill Newton case STATE_IDLE: 891f95f3850SWill Newton break; 892f95f3850SWill Newton 893f95f3850SWill Newton case STATE_SENDING_CMD: 894f95f3850SWill Newton if (!test_and_clear_bit(EVENT_CMD_COMPLETE, 895f95f3850SWill Newton &host->pending_events)) 896f95f3850SWill Newton break; 897f95f3850SWill Newton 898f95f3850SWill Newton cmd = host->cmd; 899f95f3850SWill Newton host->cmd = NULL; 900f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->completed_events); 901*053b3ce6SSeungwon Jeon dw_mci_command_complete(host, cmd); 902*053b3ce6SSeungwon Jeon if (cmd == host->mrq->sbc && !cmd->error) { 903*053b3ce6SSeungwon Jeon prev_state = state = STATE_SENDING_CMD; 904*053b3ce6SSeungwon Jeon __dw_mci_start_request(host, host->cur_slot, 905*053b3ce6SSeungwon Jeon host->mrq->cmd); 906*053b3ce6SSeungwon Jeon goto unlock; 907*053b3ce6SSeungwon Jeon } 908*053b3ce6SSeungwon Jeon 909f95f3850SWill Newton if (!host->mrq->data || cmd->error) { 910f95f3850SWill Newton dw_mci_request_end(host, host->mrq); 911f95f3850SWill Newton goto unlock; 912f95f3850SWill Newton } 913f95f3850SWill Newton 914f95f3850SWill Newton prev_state = state = STATE_SENDING_DATA; 915f95f3850SWill Newton /* fall through */ 916f95f3850SWill Newton 917f95f3850SWill Newton case STATE_SENDING_DATA: 918f95f3850SWill Newton if (test_and_clear_bit(EVENT_DATA_ERROR, 919f95f3850SWill Newton &host->pending_events)) { 920f95f3850SWill Newton dw_mci_stop_dma(host); 921f95f3850SWill Newton if (data->stop) 922f95f3850SWill Newton send_stop_cmd(host, data); 923f95f3850SWill Newton state = STATE_DATA_ERROR; 924f95f3850SWill Newton break; 925f95f3850SWill Newton } 926f95f3850SWill Newton 927f95f3850SWill Newton if (!test_and_clear_bit(EVENT_XFER_COMPLETE, 928f95f3850SWill Newton &host->pending_events)) 929f95f3850SWill Newton break; 930f95f3850SWill Newton 931f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->completed_events); 932f95f3850SWill Newton prev_state = state = STATE_DATA_BUSY; 933f95f3850SWill Newton /* fall through */ 934f95f3850SWill Newton 935f95f3850SWill Newton case STATE_DATA_BUSY: 936f95f3850SWill Newton if (!test_and_clear_bit(EVENT_DATA_COMPLETE, 937f95f3850SWill Newton &host->pending_events)) 938f95f3850SWill Newton break; 939f95f3850SWill Newton 940f95f3850SWill Newton host->data = NULL; 941f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->completed_events); 942f95f3850SWill Newton status = host->data_status; 943f95f3850SWill Newton 944f95f3850SWill Newton if (status & DW_MCI_DATA_ERROR_FLAGS) { 945f95f3850SWill Newton if (status & SDMMC_INT_DTO) { 946f95f3850SWill Newton data->error = -ETIMEDOUT; 947f95f3850SWill Newton } else if (status & SDMMC_INT_DCRC) { 948f95f3850SWill Newton data->error = -EILSEQ; 94955c5efbcSJames Hogan } else if (status & SDMMC_INT_EBE && 95055c5efbcSJames Hogan host->dir_status == 95155c5efbcSJames Hogan DW_MCI_SEND_STATUS) { 95255c5efbcSJames Hogan /* 95355c5efbcSJames Hogan * No data CRC status was returned. 95455c5efbcSJames Hogan * The number of bytes transferred will 95555c5efbcSJames Hogan * be exaggerated in PIO mode. 95655c5efbcSJames Hogan */ 95755c5efbcSJames Hogan data->bytes_xfered = 0; 95855c5efbcSJames Hogan data->error = -ETIMEDOUT; 959f95f3850SWill Newton } else { 960f95f3850SWill Newton dev_err(&host->pdev->dev, 961f95f3850SWill Newton "data FIFO error " 962f95f3850SWill Newton "(status=%08x)\n", 963f95f3850SWill Newton status); 964f95f3850SWill Newton data->error = -EIO; 965f95f3850SWill Newton } 96694dd5b33SJames Hogan /* 96794dd5b33SJames Hogan * After an error, there may be data lingering 96894dd5b33SJames Hogan * in the FIFO, so reset it - doing so 96994dd5b33SJames Hogan * generates a block interrupt, hence setting 97094dd5b33SJames Hogan * the scatter-gather pointer to NULL. 97194dd5b33SJames Hogan */ 97294dd5b33SJames Hogan host->sg = NULL; 97394dd5b33SJames Hogan ctrl = mci_readl(host, CTRL); 97494dd5b33SJames Hogan ctrl |= SDMMC_CTRL_FIFO_RESET; 97594dd5b33SJames Hogan mci_writel(host, CTRL, ctrl); 976f95f3850SWill Newton } else { 977f95f3850SWill Newton data->bytes_xfered = data->blocks * data->blksz; 978f95f3850SWill Newton data->error = 0; 979f95f3850SWill Newton } 980f95f3850SWill Newton 981f95f3850SWill Newton if (!data->stop) { 982f95f3850SWill Newton dw_mci_request_end(host, host->mrq); 983f95f3850SWill Newton goto unlock; 984f95f3850SWill Newton } 985f95f3850SWill Newton 986*053b3ce6SSeungwon Jeon if (host->mrq->sbc && !data->error) { 987*053b3ce6SSeungwon Jeon data->stop->error = 0; 988*053b3ce6SSeungwon Jeon dw_mci_request_end(host, host->mrq); 989*053b3ce6SSeungwon Jeon goto unlock; 990*053b3ce6SSeungwon Jeon } 991*053b3ce6SSeungwon Jeon 992f95f3850SWill Newton prev_state = state = STATE_SENDING_STOP; 993f95f3850SWill Newton if (!data->error) 994f95f3850SWill Newton send_stop_cmd(host, data); 995f95f3850SWill Newton /* fall through */ 996f95f3850SWill Newton 997f95f3850SWill Newton case STATE_SENDING_STOP: 998f95f3850SWill Newton if (!test_and_clear_bit(EVENT_CMD_COMPLETE, 999f95f3850SWill Newton &host->pending_events)) 1000f95f3850SWill Newton break; 1001f95f3850SWill Newton 1002f95f3850SWill Newton host->cmd = NULL; 1003f95f3850SWill Newton dw_mci_command_complete(host, host->mrq->stop); 1004f95f3850SWill Newton dw_mci_request_end(host, host->mrq); 1005f95f3850SWill Newton goto unlock; 1006f95f3850SWill Newton 1007f95f3850SWill Newton case STATE_DATA_ERROR: 1008f95f3850SWill Newton if (!test_and_clear_bit(EVENT_XFER_COMPLETE, 1009f95f3850SWill Newton &host->pending_events)) 1010f95f3850SWill Newton break; 1011f95f3850SWill Newton 1012f95f3850SWill Newton state = STATE_DATA_BUSY; 1013f95f3850SWill Newton break; 1014f95f3850SWill Newton } 1015f95f3850SWill Newton } while (state != prev_state); 1016f95f3850SWill Newton 1017f95f3850SWill Newton host->state = state; 1018f95f3850SWill Newton unlock: 1019f95f3850SWill Newton spin_unlock(&host->lock); 1020f95f3850SWill Newton 1021f95f3850SWill Newton } 1022f95f3850SWill Newton 102334b664a2SJames Hogan /* push final bytes to part_buf, only use during push */ 102434b664a2SJames Hogan static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt) 102534b664a2SJames Hogan { 102634b664a2SJames Hogan memcpy((void *)&host->part_buf, buf, cnt); 102734b664a2SJames Hogan host->part_buf_count = cnt; 102834b664a2SJames Hogan } 102934b664a2SJames Hogan 103034b664a2SJames Hogan /* append bytes to part_buf, only use during push */ 103134b664a2SJames Hogan static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt) 103234b664a2SJames Hogan { 103334b664a2SJames Hogan cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count); 103434b664a2SJames Hogan memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt); 103534b664a2SJames Hogan host->part_buf_count += cnt; 103634b664a2SJames Hogan return cnt; 103734b664a2SJames Hogan } 103834b664a2SJames Hogan 103934b664a2SJames Hogan /* pull first bytes from part_buf, only use during pull */ 104034b664a2SJames Hogan static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt) 104134b664a2SJames Hogan { 104234b664a2SJames Hogan cnt = min(cnt, (int)host->part_buf_count); 104334b664a2SJames Hogan if (cnt) { 104434b664a2SJames Hogan memcpy(buf, (void *)&host->part_buf + host->part_buf_start, 104534b664a2SJames Hogan cnt); 104634b664a2SJames Hogan host->part_buf_count -= cnt; 104734b664a2SJames Hogan host->part_buf_start += cnt; 104834b664a2SJames Hogan } 104934b664a2SJames Hogan return cnt; 105034b664a2SJames Hogan } 105134b664a2SJames Hogan 105234b664a2SJames Hogan /* pull final bytes from the part_buf, assuming it's just been filled */ 105334b664a2SJames Hogan static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt) 105434b664a2SJames Hogan { 105534b664a2SJames Hogan memcpy(buf, &host->part_buf, cnt); 105634b664a2SJames Hogan host->part_buf_start = cnt; 105734b664a2SJames Hogan host->part_buf_count = (1 << host->data_shift) - cnt; 105834b664a2SJames Hogan } 105934b664a2SJames Hogan 1060f95f3850SWill Newton static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) 1061f95f3850SWill Newton { 106234b664a2SJames Hogan /* try and push anything in the part_buf */ 106334b664a2SJames Hogan if (unlikely(host->part_buf_count)) { 106434b664a2SJames Hogan int len = dw_mci_push_part_bytes(host, buf, cnt); 106534b664a2SJames Hogan buf += len; 106634b664a2SJames Hogan cnt -= len; 106734b664a2SJames Hogan if (!sg_next(host->sg) || host->part_buf_count == 2) { 10684e0a5adfSJaehoon Chung mci_writew(host, DATA(host->data_offset), 10694e0a5adfSJaehoon Chung host->part_buf16); 107034b664a2SJames Hogan host->part_buf_count = 0; 107134b664a2SJames Hogan } 107234b664a2SJames Hogan } 107334b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 107434b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x1)) { 107534b664a2SJames Hogan while (cnt >= 2) { 107634b664a2SJames Hogan u16 aligned_buf[64]; 107734b664a2SJames Hogan int len = min(cnt & -2, (int)sizeof(aligned_buf)); 107834b664a2SJames Hogan int items = len >> 1; 107934b664a2SJames Hogan int i; 108034b664a2SJames Hogan /* memcpy from input buffer into aligned buffer */ 108134b664a2SJames Hogan memcpy(aligned_buf, buf, len); 108234b664a2SJames Hogan buf += len; 108334b664a2SJames Hogan cnt -= len; 108434b664a2SJames Hogan /* push data from aligned buffer into fifo */ 108534b664a2SJames Hogan for (i = 0; i < items; ++i) 10864e0a5adfSJaehoon Chung mci_writew(host, DATA(host->data_offset), 10874e0a5adfSJaehoon Chung aligned_buf[i]); 108834b664a2SJames Hogan } 108934b664a2SJames Hogan } else 109034b664a2SJames Hogan #endif 109134b664a2SJames Hogan { 109234b664a2SJames Hogan u16 *pdata = buf; 109334b664a2SJames Hogan for (; cnt >= 2; cnt -= 2) 10944e0a5adfSJaehoon Chung mci_writew(host, DATA(host->data_offset), *pdata++); 109534b664a2SJames Hogan buf = pdata; 109634b664a2SJames Hogan } 109734b664a2SJames Hogan /* put anything remaining in the part_buf */ 109834b664a2SJames Hogan if (cnt) { 109934b664a2SJames Hogan dw_mci_set_part_bytes(host, buf, cnt); 110034b664a2SJames Hogan if (!sg_next(host->sg)) 11014e0a5adfSJaehoon Chung mci_writew(host, DATA(host->data_offset), 11024e0a5adfSJaehoon Chung host->part_buf16); 1103f95f3850SWill Newton } 1104f95f3850SWill Newton } 1105f95f3850SWill Newton 1106f95f3850SWill Newton static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) 1107f95f3850SWill Newton { 110834b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 110934b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x1)) { 111034b664a2SJames Hogan while (cnt >= 2) { 111134b664a2SJames Hogan /* pull data from fifo into aligned buffer */ 111234b664a2SJames Hogan u16 aligned_buf[64]; 111334b664a2SJames Hogan int len = min(cnt & -2, (int)sizeof(aligned_buf)); 111434b664a2SJames Hogan int items = len >> 1; 111534b664a2SJames Hogan int i; 111634b664a2SJames Hogan for (i = 0; i < items; ++i) 11174e0a5adfSJaehoon Chung aligned_buf[i] = mci_readw(host, 11184e0a5adfSJaehoon Chung DATA(host->data_offset)); 111934b664a2SJames Hogan /* memcpy from aligned buffer into output buffer */ 112034b664a2SJames Hogan memcpy(buf, aligned_buf, len); 112134b664a2SJames Hogan buf += len; 112234b664a2SJames Hogan cnt -= len; 112334b664a2SJames Hogan } 112434b664a2SJames Hogan } else 112534b664a2SJames Hogan #endif 112634b664a2SJames Hogan { 112734b664a2SJames Hogan u16 *pdata = buf; 112834b664a2SJames Hogan for (; cnt >= 2; cnt -= 2) 11294e0a5adfSJaehoon Chung *pdata++ = mci_readw(host, DATA(host->data_offset)); 113034b664a2SJames Hogan buf = pdata; 113134b664a2SJames Hogan } 113234b664a2SJames Hogan if (cnt) { 11334e0a5adfSJaehoon Chung host->part_buf16 = mci_readw(host, DATA(host->data_offset)); 113434b664a2SJames Hogan dw_mci_pull_final_bytes(host, buf, cnt); 1135f95f3850SWill Newton } 1136f95f3850SWill Newton } 1137f95f3850SWill Newton 1138f95f3850SWill Newton static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) 1139f95f3850SWill Newton { 114034b664a2SJames Hogan /* try and push anything in the part_buf */ 114134b664a2SJames Hogan if (unlikely(host->part_buf_count)) { 114234b664a2SJames Hogan int len = dw_mci_push_part_bytes(host, buf, cnt); 114334b664a2SJames Hogan buf += len; 114434b664a2SJames Hogan cnt -= len; 114534b664a2SJames Hogan if (!sg_next(host->sg) || host->part_buf_count == 4) { 11464e0a5adfSJaehoon Chung mci_writel(host, DATA(host->data_offset), 11474e0a5adfSJaehoon Chung host->part_buf32); 114834b664a2SJames Hogan host->part_buf_count = 0; 114934b664a2SJames Hogan } 115034b664a2SJames Hogan } 115134b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 115234b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x3)) { 115334b664a2SJames Hogan while (cnt >= 4) { 115434b664a2SJames Hogan u32 aligned_buf[32]; 115534b664a2SJames Hogan int len = min(cnt & -4, (int)sizeof(aligned_buf)); 115634b664a2SJames Hogan int items = len >> 2; 115734b664a2SJames Hogan int i; 115834b664a2SJames Hogan /* memcpy from input buffer into aligned buffer */ 115934b664a2SJames Hogan memcpy(aligned_buf, buf, len); 116034b664a2SJames Hogan buf += len; 116134b664a2SJames Hogan cnt -= len; 116234b664a2SJames Hogan /* push data from aligned buffer into fifo */ 116334b664a2SJames Hogan for (i = 0; i < items; ++i) 11644e0a5adfSJaehoon Chung mci_writel(host, DATA(host->data_offset), 11654e0a5adfSJaehoon Chung aligned_buf[i]); 116634b664a2SJames Hogan } 116734b664a2SJames Hogan } else 116834b664a2SJames Hogan #endif 116934b664a2SJames Hogan { 117034b664a2SJames Hogan u32 *pdata = buf; 117134b664a2SJames Hogan for (; cnt >= 4; cnt -= 4) 11724e0a5adfSJaehoon Chung mci_writel(host, DATA(host->data_offset), *pdata++); 117334b664a2SJames Hogan buf = pdata; 117434b664a2SJames Hogan } 117534b664a2SJames Hogan /* put anything remaining in the part_buf */ 117634b664a2SJames Hogan if (cnt) { 117734b664a2SJames Hogan dw_mci_set_part_bytes(host, buf, cnt); 117834b664a2SJames Hogan if (!sg_next(host->sg)) 11794e0a5adfSJaehoon Chung mci_writel(host, DATA(host->data_offset), 11804e0a5adfSJaehoon Chung host->part_buf32); 1181f95f3850SWill Newton } 1182f95f3850SWill Newton } 1183f95f3850SWill Newton 1184f95f3850SWill Newton static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) 1185f95f3850SWill Newton { 118634b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 118734b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x3)) { 118834b664a2SJames Hogan while (cnt >= 4) { 118934b664a2SJames Hogan /* pull data from fifo into aligned buffer */ 119034b664a2SJames Hogan u32 aligned_buf[32]; 119134b664a2SJames Hogan int len = min(cnt & -4, (int)sizeof(aligned_buf)); 119234b664a2SJames Hogan int items = len >> 2; 119334b664a2SJames Hogan int i; 119434b664a2SJames Hogan for (i = 0; i < items; ++i) 11954e0a5adfSJaehoon Chung aligned_buf[i] = mci_readl(host, 11964e0a5adfSJaehoon Chung DATA(host->data_offset)); 119734b664a2SJames Hogan /* memcpy from aligned buffer into output buffer */ 119834b664a2SJames Hogan memcpy(buf, aligned_buf, len); 119934b664a2SJames Hogan buf += len; 120034b664a2SJames Hogan cnt -= len; 120134b664a2SJames Hogan } 120234b664a2SJames Hogan } else 120334b664a2SJames Hogan #endif 120434b664a2SJames Hogan { 120534b664a2SJames Hogan u32 *pdata = buf; 120634b664a2SJames Hogan for (; cnt >= 4; cnt -= 4) 12074e0a5adfSJaehoon Chung *pdata++ = mci_readl(host, DATA(host->data_offset)); 120834b664a2SJames Hogan buf = pdata; 120934b664a2SJames Hogan } 121034b664a2SJames Hogan if (cnt) { 12114e0a5adfSJaehoon Chung host->part_buf32 = mci_readl(host, DATA(host->data_offset)); 121234b664a2SJames Hogan dw_mci_pull_final_bytes(host, buf, cnt); 1213f95f3850SWill Newton } 1214f95f3850SWill Newton } 1215f95f3850SWill Newton 1216f95f3850SWill Newton static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) 1217f95f3850SWill Newton { 121834b664a2SJames Hogan /* try and push anything in the part_buf */ 121934b664a2SJames Hogan if (unlikely(host->part_buf_count)) { 122034b664a2SJames Hogan int len = dw_mci_push_part_bytes(host, buf, cnt); 122134b664a2SJames Hogan buf += len; 122234b664a2SJames Hogan cnt -= len; 122334b664a2SJames Hogan if (!sg_next(host->sg) || host->part_buf_count == 8) { 12244e0a5adfSJaehoon Chung mci_writew(host, DATA(host->data_offset), 12254e0a5adfSJaehoon Chung host->part_buf); 122634b664a2SJames Hogan host->part_buf_count = 0; 122734b664a2SJames Hogan } 122834b664a2SJames Hogan } 122934b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 123034b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x7)) { 123134b664a2SJames Hogan while (cnt >= 8) { 123234b664a2SJames Hogan u64 aligned_buf[16]; 123334b664a2SJames Hogan int len = min(cnt & -8, (int)sizeof(aligned_buf)); 123434b664a2SJames Hogan int items = len >> 3; 123534b664a2SJames Hogan int i; 123634b664a2SJames Hogan /* memcpy from input buffer into aligned buffer */ 123734b664a2SJames Hogan memcpy(aligned_buf, buf, len); 123834b664a2SJames Hogan buf += len; 123934b664a2SJames Hogan cnt -= len; 124034b664a2SJames Hogan /* push data from aligned buffer into fifo */ 124134b664a2SJames Hogan for (i = 0; i < items; ++i) 12424e0a5adfSJaehoon Chung mci_writeq(host, DATA(host->data_offset), 12434e0a5adfSJaehoon Chung aligned_buf[i]); 124434b664a2SJames Hogan } 124534b664a2SJames Hogan } else 124634b664a2SJames Hogan #endif 124734b664a2SJames Hogan { 124834b664a2SJames Hogan u64 *pdata = buf; 124934b664a2SJames Hogan for (; cnt >= 8; cnt -= 8) 12504e0a5adfSJaehoon Chung mci_writeq(host, DATA(host->data_offset), *pdata++); 125134b664a2SJames Hogan buf = pdata; 125234b664a2SJames Hogan } 125334b664a2SJames Hogan /* put anything remaining in the part_buf */ 125434b664a2SJames Hogan if (cnt) { 125534b664a2SJames Hogan dw_mci_set_part_bytes(host, buf, cnt); 125634b664a2SJames Hogan if (!sg_next(host->sg)) 12574e0a5adfSJaehoon Chung mci_writeq(host, DATA(host->data_offset), 12584e0a5adfSJaehoon Chung host->part_buf); 1259f95f3850SWill Newton } 1260f95f3850SWill Newton } 1261f95f3850SWill Newton 1262f95f3850SWill Newton static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) 1263f95f3850SWill Newton { 126434b664a2SJames Hogan #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 126534b664a2SJames Hogan if (unlikely((unsigned long)buf & 0x7)) { 126634b664a2SJames Hogan while (cnt >= 8) { 126734b664a2SJames Hogan /* pull data from fifo into aligned buffer */ 126834b664a2SJames Hogan u64 aligned_buf[16]; 126934b664a2SJames Hogan int len = min(cnt & -8, (int)sizeof(aligned_buf)); 127034b664a2SJames Hogan int items = len >> 3; 127134b664a2SJames Hogan int i; 127234b664a2SJames Hogan for (i = 0; i < items; ++i) 12734e0a5adfSJaehoon Chung aligned_buf[i] = mci_readq(host, 12744e0a5adfSJaehoon Chung DATA(host->data_offset)); 127534b664a2SJames Hogan /* memcpy from aligned buffer into output buffer */ 127634b664a2SJames Hogan memcpy(buf, aligned_buf, len); 127734b664a2SJames Hogan buf += len; 127834b664a2SJames Hogan cnt -= len; 1279f95f3850SWill Newton } 128034b664a2SJames Hogan } else 128134b664a2SJames Hogan #endif 128234b664a2SJames Hogan { 128334b664a2SJames Hogan u64 *pdata = buf; 128434b664a2SJames Hogan for (; cnt >= 8; cnt -= 8) 12854e0a5adfSJaehoon Chung *pdata++ = mci_readq(host, DATA(host->data_offset)); 128634b664a2SJames Hogan buf = pdata; 128734b664a2SJames Hogan } 128834b664a2SJames Hogan if (cnt) { 12894e0a5adfSJaehoon Chung host->part_buf = mci_readq(host, DATA(host->data_offset)); 129034b664a2SJames Hogan dw_mci_pull_final_bytes(host, buf, cnt); 129134b664a2SJames Hogan } 129234b664a2SJames Hogan } 129334b664a2SJames Hogan 129434b664a2SJames Hogan static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt) 129534b664a2SJames Hogan { 129634b664a2SJames Hogan int len; 129734b664a2SJames Hogan 129834b664a2SJames Hogan /* get remaining partial bytes */ 129934b664a2SJames Hogan len = dw_mci_pull_part_bytes(host, buf, cnt); 130034b664a2SJames Hogan if (unlikely(len == cnt)) 130134b664a2SJames Hogan return; 130234b664a2SJames Hogan buf += len; 130334b664a2SJames Hogan cnt -= len; 130434b664a2SJames Hogan 130534b664a2SJames Hogan /* get the rest of the data */ 130634b664a2SJames Hogan host->pull_data(host, buf, cnt); 1307f95f3850SWill Newton } 1308f95f3850SWill Newton 1309f95f3850SWill Newton static void dw_mci_read_data_pio(struct dw_mci *host) 1310f95f3850SWill Newton { 1311f95f3850SWill Newton struct scatterlist *sg = host->sg; 1312f95f3850SWill Newton void *buf = sg_virt(sg); 1313f95f3850SWill Newton unsigned int offset = host->pio_offset; 1314f95f3850SWill Newton struct mmc_data *data = host->data; 1315f95f3850SWill Newton int shift = host->data_shift; 1316f95f3850SWill Newton u32 status; 1317ba6a902dSChris Ball unsigned int nbytes = 0, len; 1318f95f3850SWill Newton 1319f95f3850SWill Newton do { 132034b664a2SJames Hogan len = host->part_buf_count + 132134b664a2SJames Hogan (SDMMC_GET_FCNT(mci_readl(host, STATUS)) << shift); 1322f95f3850SWill Newton if (offset + len <= sg->length) { 132334b664a2SJames Hogan dw_mci_pull_data(host, (void *)(buf + offset), len); 1324f95f3850SWill Newton 1325f95f3850SWill Newton offset += len; 1326f95f3850SWill Newton nbytes += len; 1327f95f3850SWill Newton 1328f95f3850SWill Newton if (offset == sg->length) { 1329f95f3850SWill Newton flush_dcache_page(sg_page(sg)); 1330f95f3850SWill Newton host->sg = sg = sg_next(sg); 1331f95f3850SWill Newton if (!sg) 1332f95f3850SWill Newton goto done; 1333f95f3850SWill Newton 1334f95f3850SWill Newton offset = 0; 1335f95f3850SWill Newton buf = sg_virt(sg); 1336f95f3850SWill Newton } 1337f95f3850SWill Newton } else { 1338f95f3850SWill Newton unsigned int remaining = sg->length - offset; 133934b664a2SJames Hogan dw_mci_pull_data(host, (void *)(buf + offset), 1340f95f3850SWill Newton remaining); 1341f95f3850SWill Newton nbytes += remaining; 1342f95f3850SWill Newton 1343f95f3850SWill Newton flush_dcache_page(sg_page(sg)); 1344f95f3850SWill Newton host->sg = sg = sg_next(sg); 1345f95f3850SWill Newton if (!sg) 1346f95f3850SWill Newton goto done; 1347f95f3850SWill Newton 1348f95f3850SWill Newton offset = len - remaining; 1349f95f3850SWill Newton buf = sg_virt(sg); 135034b664a2SJames Hogan dw_mci_pull_data(host, buf, offset); 1351f95f3850SWill Newton nbytes += offset; 1352f95f3850SWill Newton } 1353f95f3850SWill Newton 1354f95f3850SWill Newton status = mci_readl(host, MINTSTS); 1355f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_RXDR); 1356f95f3850SWill Newton if (status & DW_MCI_DATA_ERROR_FLAGS) { 1357f95f3850SWill Newton host->data_status = status; 1358f95f3850SWill Newton data->bytes_xfered += nbytes; 1359f95f3850SWill Newton smp_wmb(); 1360f95f3850SWill Newton 1361f95f3850SWill Newton set_bit(EVENT_DATA_ERROR, &host->pending_events); 1362f95f3850SWill Newton 1363f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1364f95f3850SWill Newton return; 1365f95f3850SWill Newton } 1366f95f3850SWill Newton } while (status & SDMMC_INT_RXDR); /*if the RXDR is ready read again*/ 1367f95f3850SWill Newton host->pio_offset = offset; 1368f95f3850SWill Newton data->bytes_xfered += nbytes; 1369f95f3850SWill Newton return; 1370f95f3850SWill Newton 1371f95f3850SWill Newton done: 1372f95f3850SWill Newton data->bytes_xfered += nbytes; 1373f95f3850SWill Newton smp_wmb(); 1374f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 1375f95f3850SWill Newton } 1376f95f3850SWill Newton 1377f95f3850SWill Newton static void dw_mci_write_data_pio(struct dw_mci *host) 1378f95f3850SWill Newton { 1379f95f3850SWill Newton struct scatterlist *sg = host->sg; 1380f95f3850SWill Newton void *buf = sg_virt(sg); 1381f95f3850SWill Newton unsigned int offset = host->pio_offset; 1382f95f3850SWill Newton struct mmc_data *data = host->data; 1383f95f3850SWill Newton int shift = host->data_shift; 1384f95f3850SWill Newton u32 status; 1385f95f3850SWill Newton unsigned int nbytes = 0, len; 1386f95f3850SWill Newton 1387f95f3850SWill Newton do { 138834b664a2SJames Hogan len = ((host->fifo_depth - 138934b664a2SJames Hogan SDMMC_GET_FCNT(mci_readl(host, STATUS))) << shift) 139034b664a2SJames Hogan - host->part_buf_count; 1391f95f3850SWill Newton if (offset + len <= sg->length) { 1392f95f3850SWill Newton host->push_data(host, (void *)(buf + offset), len); 1393f95f3850SWill Newton 1394f95f3850SWill Newton offset += len; 1395f95f3850SWill Newton nbytes += len; 1396f95f3850SWill Newton if (offset == sg->length) { 1397f95f3850SWill Newton host->sg = sg = sg_next(sg); 1398f95f3850SWill Newton if (!sg) 1399f95f3850SWill Newton goto done; 1400f95f3850SWill Newton 1401f95f3850SWill Newton offset = 0; 1402f95f3850SWill Newton buf = sg_virt(sg); 1403f95f3850SWill Newton } 1404f95f3850SWill Newton } else { 1405f95f3850SWill Newton unsigned int remaining = sg->length - offset; 1406f95f3850SWill Newton 1407f95f3850SWill Newton host->push_data(host, (void *)(buf + offset), 1408f95f3850SWill Newton remaining); 1409f95f3850SWill Newton nbytes += remaining; 1410f95f3850SWill Newton 1411f95f3850SWill Newton host->sg = sg = sg_next(sg); 1412f95f3850SWill Newton if (!sg) 1413f95f3850SWill Newton goto done; 1414f95f3850SWill Newton 1415f95f3850SWill Newton offset = len - remaining; 1416f95f3850SWill Newton buf = sg_virt(sg); 1417f95f3850SWill Newton host->push_data(host, (void *)buf, offset); 1418f95f3850SWill Newton nbytes += offset; 1419f95f3850SWill Newton } 1420f95f3850SWill Newton 1421f95f3850SWill Newton status = mci_readl(host, MINTSTS); 1422f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_TXDR); 1423f95f3850SWill Newton if (status & DW_MCI_DATA_ERROR_FLAGS) { 1424f95f3850SWill Newton host->data_status = status; 1425f95f3850SWill Newton data->bytes_xfered += nbytes; 1426f95f3850SWill Newton 1427f95f3850SWill Newton smp_wmb(); 1428f95f3850SWill Newton 1429f95f3850SWill Newton set_bit(EVENT_DATA_ERROR, &host->pending_events); 1430f95f3850SWill Newton 1431f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1432f95f3850SWill Newton return; 1433f95f3850SWill Newton } 1434f95f3850SWill Newton } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ 1435f95f3850SWill Newton host->pio_offset = offset; 1436f95f3850SWill Newton data->bytes_xfered += nbytes; 1437f95f3850SWill Newton return; 1438f95f3850SWill Newton 1439f95f3850SWill Newton done: 1440f95f3850SWill Newton data->bytes_xfered += nbytes; 1441f95f3850SWill Newton smp_wmb(); 1442f95f3850SWill Newton set_bit(EVENT_XFER_COMPLETE, &host->pending_events); 1443f95f3850SWill Newton } 1444f95f3850SWill Newton 1445f95f3850SWill Newton static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) 1446f95f3850SWill Newton { 1447f95f3850SWill Newton if (!host->cmd_status) 1448f95f3850SWill Newton host->cmd_status = status; 1449f95f3850SWill Newton 1450f95f3850SWill Newton smp_wmb(); 1451f95f3850SWill Newton 1452f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->pending_events); 1453f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1454f95f3850SWill Newton } 1455f95f3850SWill Newton 1456f95f3850SWill Newton static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) 1457f95f3850SWill Newton { 1458f95f3850SWill Newton struct dw_mci *host = dev_id; 1459f95f3850SWill Newton u32 status, pending; 1460f95f3850SWill Newton unsigned int pass_count = 0; 14611a5c8e1fSShashidhar Hiremath int i; 1462f95f3850SWill Newton 1463f95f3850SWill Newton do { 1464f95f3850SWill Newton status = mci_readl(host, RINTSTS); 1465f95f3850SWill Newton pending = mci_readl(host, MINTSTS); /* read-only mask reg */ 1466f95f3850SWill Newton 1467f95f3850SWill Newton /* 1468f95f3850SWill Newton * DTO fix - version 2.10a and below, and only if internal DMA 1469f95f3850SWill Newton * is configured. 1470f95f3850SWill Newton */ 1471f95f3850SWill Newton if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) { 1472f95f3850SWill Newton if (!pending && 1473f95f3850SWill Newton ((mci_readl(host, STATUS) >> 17) & 0x1fff)) 1474f95f3850SWill Newton pending |= SDMMC_INT_DATA_OVER; 1475f95f3850SWill Newton } 1476f95f3850SWill Newton 1477f95f3850SWill Newton if (!pending) 1478f95f3850SWill Newton break; 1479f95f3850SWill Newton 1480f95f3850SWill Newton if (pending & DW_MCI_CMD_ERROR_FLAGS) { 1481f95f3850SWill Newton mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); 1482f95f3850SWill Newton host->cmd_status = status; 1483f95f3850SWill Newton smp_wmb(); 1484f95f3850SWill Newton set_bit(EVENT_CMD_COMPLETE, &host->pending_events); 1485f95f3850SWill Newton } 1486f95f3850SWill Newton 1487f95f3850SWill Newton if (pending & DW_MCI_DATA_ERROR_FLAGS) { 1488f95f3850SWill Newton /* if there is an error report DATA_ERROR */ 1489f95f3850SWill Newton mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); 1490f95f3850SWill Newton host->data_status = status; 1491f95f3850SWill Newton smp_wmb(); 1492f95f3850SWill Newton set_bit(EVENT_DATA_ERROR, &host->pending_events); 14936e83e10dSSeungwon Jeon if (!(pending & (SDMMC_INT_DTO | SDMMC_INT_DCRC | 14946e83e10dSSeungwon Jeon SDMMC_INT_SBE | SDMMC_INT_EBE))) 1495f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1496f95f3850SWill Newton } 1497f95f3850SWill Newton 1498f95f3850SWill Newton if (pending & SDMMC_INT_DATA_OVER) { 1499f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); 1500f95f3850SWill Newton if (!host->data_status) 1501f95f3850SWill Newton host->data_status = status; 1502f95f3850SWill Newton smp_wmb(); 1503f95f3850SWill Newton if (host->dir_status == DW_MCI_RECV_STATUS) { 1504f95f3850SWill Newton if (host->sg != NULL) 1505f95f3850SWill Newton dw_mci_read_data_pio(host); 1506f95f3850SWill Newton } 1507f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->pending_events); 1508f95f3850SWill Newton tasklet_schedule(&host->tasklet); 1509f95f3850SWill Newton } 1510f95f3850SWill Newton 1511f95f3850SWill Newton if (pending & SDMMC_INT_RXDR) { 1512f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_RXDR); 1513b40af3aaSJames Hogan if (host->dir_status == DW_MCI_RECV_STATUS && host->sg) 1514f95f3850SWill Newton dw_mci_read_data_pio(host); 1515f95f3850SWill Newton } 1516f95f3850SWill Newton 1517f95f3850SWill Newton if (pending & SDMMC_INT_TXDR) { 1518f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_TXDR); 1519b40af3aaSJames Hogan if (host->dir_status == DW_MCI_SEND_STATUS && host->sg) 1520f95f3850SWill Newton dw_mci_write_data_pio(host); 1521f95f3850SWill Newton } 1522f95f3850SWill Newton 1523f95f3850SWill Newton if (pending & SDMMC_INT_CMD_DONE) { 1524f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); 1525f95f3850SWill Newton dw_mci_cmd_interrupt(host, status); 1526f95f3850SWill Newton } 1527f95f3850SWill Newton 1528f95f3850SWill Newton if (pending & SDMMC_INT_CD) { 1529f95f3850SWill Newton mci_writel(host, RINTSTS, SDMMC_INT_CD); 15301791b13eSJames Hogan queue_work(dw_mci_card_workqueue, &host->card_work); 1531f95f3850SWill Newton } 1532f95f3850SWill Newton 15331a5c8e1fSShashidhar Hiremath /* Handle SDIO Interrupts */ 15341a5c8e1fSShashidhar Hiremath for (i = 0; i < host->num_slots; i++) { 15351a5c8e1fSShashidhar Hiremath struct dw_mci_slot *slot = host->slot[i]; 15361a5c8e1fSShashidhar Hiremath if (pending & SDMMC_INT_SDIO(i)) { 15371a5c8e1fSShashidhar Hiremath mci_writel(host, RINTSTS, SDMMC_INT_SDIO(i)); 15381a5c8e1fSShashidhar Hiremath mmc_signal_sdio_irq(slot->mmc); 15391a5c8e1fSShashidhar Hiremath } 15401a5c8e1fSShashidhar Hiremath } 15411a5c8e1fSShashidhar Hiremath 1542f95f3850SWill Newton } while (pass_count++ < 5); 1543f95f3850SWill Newton 1544f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1545f95f3850SWill Newton /* Handle DMA interrupts */ 1546f95f3850SWill Newton pending = mci_readl(host, IDSTS); 1547f95f3850SWill Newton if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { 1548f95f3850SWill Newton mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI); 1549f95f3850SWill Newton mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); 1550f95f3850SWill Newton set_bit(EVENT_DATA_COMPLETE, &host->pending_events); 1551f95f3850SWill Newton host->dma_ops->complete(host); 1552f95f3850SWill Newton } 1553f95f3850SWill Newton #endif 1554f95f3850SWill Newton 1555f95f3850SWill Newton return IRQ_HANDLED; 1556f95f3850SWill Newton } 1557f95f3850SWill Newton 15581791b13eSJames Hogan static void dw_mci_work_routine_card(struct work_struct *work) 1559f95f3850SWill Newton { 15601791b13eSJames Hogan struct dw_mci *host = container_of(work, struct dw_mci, card_work); 1561f95f3850SWill Newton int i; 1562f95f3850SWill Newton 1563f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 1564f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 1565f95f3850SWill Newton struct mmc_host *mmc = slot->mmc; 1566f95f3850SWill Newton struct mmc_request *mrq; 1567f95f3850SWill Newton int present; 1568f95f3850SWill Newton u32 ctrl; 1569f95f3850SWill Newton 1570f95f3850SWill Newton present = dw_mci_get_cd(mmc); 1571f95f3850SWill Newton while (present != slot->last_detect_state) { 1572f95f3850SWill Newton dev_dbg(&slot->mmc->class_dev, "card %s\n", 1573f95f3850SWill Newton present ? "inserted" : "removed"); 1574f95f3850SWill Newton 15751791b13eSJames Hogan /* Power up slot (before spin_lock, may sleep) */ 15761791b13eSJames Hogan if (present != 0 && host->pdata->setpower) 15771791b13eSJames Hogan host->pdata->setpower(slot->id, mmc->ocr_avail); 15781791b13eSJames Hogan 15791791b13eSJames Hogan spin_lock_bh(&host->lock); 15801791b13eSJames Hogan 1581f95f3850SWill Newton /* Card change detected */ 1582f95f3850SWill Newton slot->last_detect_state = present; 1583f95f3850SWill Newton 15841791b13eSJames Hogan /* Mark card as present if applicable */ 15851791b13eSJames Hogan if (present != 0) 1586f95f3850SWill Newton set_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1587f95f3850SWill Newton 1588f95f3850SWill Newton /* Clean up queue if present */ 1589f95f3850SWill Newton mrq = slot->mrq; 1590f95f3850SWill Newton if (mrq) { 1591f95f3850SWill Newton if (mrq == host->mrq) { 1592f95f3850SWill Newton host->data = NULL; 1593f95f3850SWill Newton host->cmd = NULL; 1594f95f3850SWill Newton 1595f95f3850SWill Newton switch (host->state) { 1596f95f3850SWill Newton case STATE_IDLE: 1597f95f3850SWill Newton break; 1598f95f3850SWill Newton case STATE_SENDING_CMD: 1599f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 1600f95f3850SWill Newton if (!mrq->data) 1601f95f3850SWill Newton break; 1602f95f3850SWill Newton /* fall through */ 1603f95f3850SWill Newton case STATE_SENDING_DATA: 1604f95f3850SWill Newton mrq->data->error = -ENOMEDIUM; 1605f95f3850SWill Newton dw_mci_stop_dma(host); 1606f95f3850SWill Newton break; 1607f95f3850SWill Newton case STATE_DATA_BUSY: 1608f95f3850SWill Newton case STATE_DATA_ERROR: 1609f95f3850SWill Newton if (mrq->data->error == -EINPROGRESS) 1610f95f3850SWill Newton mrq->data->error = -ENOMEDIUM; 1611f95f3850SWill Newton if (!mrq->stop) 1612f95f3850SWill Newton break; 1613f95f3850SWill Newton /* fall through */ 1614f95f3850SWill Newton case STATE_SENDING_STOP: 1615f95f3850SWill Newton mrq->stop->error = -ENOMEDIUM; 1616f95f3850SWill Newton break; 1617f95f3850SWill Newton } 1618f95f3850SWill Newton 1619f95f3850SWill Newton dw_mci_request_end(host, mrq); 1620f95f3850SWill Newton } else { 1621f95f3850SWill Newton list_del(&slot->queue_node); 1622f95f3850SWill Newton mrq->cmd->error = -ENOMEDIUM; 1623f95f3850SWill Newton if (mrq->data) 1624f95f3850SWill Newton mrq->data->error = -ENOMEDIUM; 1625f95f3850SWill Newton if (mrq->stop) 1626f95f3850SWill Newton mrq->stop->error = -ENOMEDIUM; 1627f95f3850SWill Newton 1628f95f3850SWill Newton spin_unlock(&host->lock); 1629f95f3850SWill Newton mmc_request_done(slot->mmc, mrq); 1630f95f3850SWill Newton spin_lock(&host->lock); 1631f95f3850SWill Newton } 1632f95f3850SWill Newton } 1633f95f3850SWill Newton 1634f95f3850SWill Newton /* Power down slot */ 1635f95f3850SWill Newton if (present == 0) { 1636f95f3850SWill Newton clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1637f95f3850SWill Newton 1638f95f3850SWill Newton /* 1639f95f3850SWill Newton * Clear down the FIFO - doing so generates a 1640f95f3850SWill Newton * block interrupt, hence setting the 1641f95f3850SWill Newton * scatter-gather pointer to NULL. 1642f95f3850SWill Newton */ 1643f95f3850SWill Newton host->sg = NULL; 1644f95f3850SWill Newton 1645f95f3850SWill Newton ctrl = mci_readl(host, CTRL); 1646f95f3850SWill Newton ctrl |= SDMMC_CTRL_FIFO_RESET; 1647f95f3850SWill Newton mci_writel(host, CTRL, ctrl); 1648f95f3850SWill Newton 1649f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1650f95f3850SWill Newton ctrl = mci_readl(host, BMOD); 1651f95f3850SWill Newton ctrl |= 0x01; /* Software reset of DMA */ 1652f95f3850SWill Newton mci_writel(host, BMOD, ctrl); 1653f95f3850SWill Newton #endif 1654f95f3850SWill Newton 1655f95f3850SWill Newton } 1656f95f3850SWill Newton 16571791b13eSJames Hogan spin_unlock_bh(&host->lock); 16581791b13eSJames Hogan 16591791b13eSJames Hogan /* Power down slot (after spin_unlock, may sleep) */ 16601791b13eSJames Hogan if (present == 0 && host->pdata->setpower) 16611791b13eSJames Hogan host->pdata->setpower(slot->id, 0); 16621791b13eSJames Hogan 1663f95f3850SWill Newton present = dw_mci_get_cd(mmc); 1664f95f3850SWill Newton } 1665f95f3850SWill Newton 1666f95f3850SWill Newton mmc_detect_change(slot->mmc, 1667f95f3850SWill Newton msecs_to_jiffies(host->pdata->detect_delay_ms)); 1668f95f3850SWill Newton } 1669f95f3850SWill Newton } 1670f95f3850SWill Newton 1671f95f3850SWill Newton static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id) 1672f95f3850SWill Newton { 1673f95f3850SWill Newton struct mmc_host *mmc; 1674f95f3850SWill Newton struct dw_mci_slot *slot; 1675f95f3850SWill Newton 1676f95f3850SWill Newton mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), &host->pdev->dev); 1677f95f3850SWill Newton if (!mmc) 1678f95f3850SWill Newton return -ENOMEM; 1679f95f3850SWill Newton 1680f95f3850SWill Newton slot = mmc_priv(mmc); 1681f95f3850SWill Newton slot->id = id; 1682f95f3850SWill Newton slot->mmc = mmc; 1683f95f3850SWill Newton slot->host = host; 1684f95f3850SWill Newton 1685f95f3850SWill Newton mmc->ops = &dw_mci_ops; 1686f95f3850SWill Newton mmc->f_min = DIV_ROUND_UP(host->bus_hz, 510); 1687f95f3850SWill Newton mmc->f_max = host->bus_hz; 1688f95f3850SWill Newton 1689f95f3850SWill Newton if (host->pdata->get_ocr) 1690f95f3850SWill Newton mmc->ocr_avail = host->pdata->get_ocr(id); 1691f95f3850SWill Newton else 1692f95f3850SWill Newton mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1693f95f3850SWill Newton 1694f95f3850SWill Newton /* 1695f95f3850SWill Newton * Start with slot power disabled, it will be enabled when a card 1696f95f3850SWill Newton * is detected. 1697f95f3850SWill Newton */ 1698f95f3850SWill Newton if (host->pdata->setpower) 1699f95f3850SWill Newton host->pdata->setpower(id, 0); 1700f95f3850SWill Newton 1701fc3d7720SJaehoon Chung if (host->pdata->caps) 1702fc3d7720SJaehoon Chung mmc->caps = host->pdata->caps; 1703fc3d7720SJaehoon Chung 17044f408cc6SSeungwon Jeon if (host->pdata->caps2) 17054f408cc6SSeungwon Jeon mmc->caps2 = host->pdata->caps2; 17064f408cc6SSeungwon Jeon 1707f95f3850SWill Newton if (host->pdata->get_bus_wd) 1708f95f3850SWill Newton if (host->pdata->get_bus_wd(slot->id) >= 4) 1709f95f3850SWill Newton mmc->caps |= MMC_CAP_4_BIT_DATA; 1710f95f3850SWill Newton 1711f95f3850SWill Newton if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED) 17126daa7778SSeungwon Jeon mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; 1713f95f3850SWill Newton 1714f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1715f95f3850SWill Newton mmc->max_segs = host->ring_size; 1716f95f3850SWill Newton mmc->max_blk_size = 65536; 1717f95f3850SWill Newton mmc->max_blk_count = host->ring_size; 1718f95f3850SWill Newton mmc->max_seg_size = 0x1000; 1719f95f3850SWill Newton mmc->max_req_size = mmc->max_seg_size * mmc->max_blk_count; 1720f95f3850SWill Newton #else 1721f95f3850SWill Newton if (host->pdata->blk_settings) { 1722f95f3850SWill Newton mmc->max_segs = host->pdata->blk_settings->max_segs; 1723f95f3850SWill Newton mmc->max_blk_size = host->pdata->blk_settings->max_blk_size; 1724f95f3850SWill Newton mmc->max_blk_count = host->pdata->blk_settings->max_blk_count; 1725f95f3850SWill Newton mmc->max_req_size = host->pdata->blk_settings->max_req_size; 1726f95f3850SWill Newton mmc->max_seg_size = host->pdata->blk_settings->max_seg_size; 1727f95f3850SWill Newton } else { 1728f95f3850SWill Newton /* Useful defaults if platform data is unset. */ 1729f95f3850SWill Newton mmc->max_segs = 64; 1730f95f3850SWill Newton mmc->max_blk_size = 65536; /* BLKSIZ is 16 bits */ 1731f95f3850SWill Newton mmc->max_blk_count = 512; 1732f95f3850SWill Newton mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 1733f95f3850SWill Newton mmc->max_seg_size = mmc->max_req_size; 1734f95f3850SWill Newton } 1735f95f3850SWill Newton #endif /* CONFIG_MMC_DW_IDMAC */ 1736f95f3850SWill Newton 1737c07946a3SJaehoon Chung host->vmmc = regulator_get(mmc_dev(mmc), "vmmc"); 1738c07946a3SJaehoon Chung if (IS_ERR(host->vmmc)) { 1739a3c76eb9SGirish K S pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc)); 1740c07946a3SJaehoon Chung host->vmmc = NULL; 1741c07946a3SJaehoon Chung } else 1742c07946a3SJaehoon Chung regulator_enable(host->vmmc); 1743c07946a3SJaehoon Chung 1744f95f3850SWill Newton if (dw_mci_get_cd(mmc)) 1745f95f3850SWill Newton set_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1746f95f3850SWill Newton else 1747f95f3850SWill Newton clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); 1748f95f3850SWill Newton 1749f95f3850SWill Newton host->slot[id] = slot; 1750f95f3850SWill Newton mmc_add_host(mmc); 1751f95f3850SWill Newton 1752f95f3850SWill Newton #if defined(CONFIG_DEBUG_FS) 1753f95f3850SWill Newton dw_mci_init_debugfs(slot); 1754f95f3850SWill Newton #endif 1755f95f3850SWill Newton 1756f95f3850SWill Newton /* Card initially undetected */ 1757f95f3850SWill Newton slot->last_detect_state = 0; 1758f95f3850SWill Newton 1759dd6c4b98SWill Newton /* 1760dd6c4b98SWill Newton * Card may have been plugged in prior to boot so we 1761dd6c4b98SWill Newton * need to run the detect tasklet 1762dd6c4b98SWill Newton */ 17631791b13eSJames Hogan queue_work(dw_mci_card_workqueue, &host->card_work); 1764dd6c4b98SWill Newton 1765f95f3850SWill Newton return 0; 1766f95f3850SWill Newton } 1767f95f3850SWill Newton 1768f95f3850SWill Newton static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) 1769f95f3850SWill Newton { 1770f95f3850SWill Newton /* Shutdown detect IRQ */ 1771f95f3850SWill Newton if (slot->host->pdata->exit) 1772f95f3850SWill Newton slot->host->pdata->exit(id); 1773f95f3850SWill Newton 1774f95f3850SWill Newton /* Debugfs stuff is cleaned up by mmc core */ 1775f95f3850SWill Newton mmc_remove_host(slot->mmc); 1776f95f3850SWill Newton slot->host->slot[id] = NULL; 1777f95f3850SWill Newton mmc_free_host(slot->mmc); 1778f95f3850SWill Newton } 1779f95f3850SWill Newton 1780f95f3850SWill Newton static void dw_mci_init_dma(struct dw_mci *host) 1781f95f3850SWill Newton { 1782f95f3850SWill Newton /* Alloc memory for sg translation */ 1783f95f3850SWill Newton host->sg_cpu = dma_alloc_coherent(&host->pdev->dev, PAGE_SIZE, 1784f95f3850SWill Newton &host->sg_dma, GFP_KERNEL); 1785f95f3850SWill Newton if (!host->sg_cpu) { 1786f95f3850SWill Newton dev_err(&host->pdev->dev, "%s: could not alloc DMA memory\n", 1787f95f3850SWill Newton __func__); 1788f95f3850SWill Newton goto no_dma; 1789f95f3850SWill Newton } 1790f95f3850SWill Newton 1791f95f3850SWill Newton /* Determine which DMA interface to use */ 1792f95f3850SWill Newton #ifdef CONFIG_MMC_DW_IDMAC 1793f95f3850SWill Newton host->dma_ops = &dw_mci_idmac_ops; 1794f95f3850SWill Newton dev_info(&host->pdev->dev, "Using internal DMA controller.\n"); 1795f95f3850SWill Newton #endif 1796f95f3850SWill Newton 1797f95f3850SWill Newton if (!host->dma_ops) 1798f95f3850SWill Newton goto no_dma; 1799f95f3850SWill Newton 1800f95f3850SWill Newton if (host->dma_ops->init) { 1801f95f3850SWill Newton if (host->dma_ops->init(host)) { 1802f95f3850SWill Newton dev_err(&host->pdev->dev, "%s: Unable to initialize " 1803f95f3850SWill Newton "DMA Controller.\n", __func__); 1804f95f3850SWill Newton goto no_dma; 1805f95f3850SWill Newton } 1806f95f3850SWill Newton } else { 1807f95f3850SWill Newton dev_err(&host->pdev->dev, "DMA initialization not found.\n"); 1808f95f3850SWill Newton goto no_dma; 1809f95f3850SWill Newton } 1810f95f3850SWill Newton 1811f95f3850SWill Newton host->use_dma = 1; 1812f95f3850SWill Newton return; 1813f95f3850SWill Newton 1814f95f3850SWill Newton no_dma: 1815f95f3850SWill Newton dev_info(&host->pdev->dev, "Using PIO mode.\n"); 1816f95f3850SWill Newton host->use_dma = 0; 1817f95f3850SWill Newton return; 1818f95f3850SWill Newton } 1819f95f3850SWill Newton 1820f95f3850SWill Newton static bool mci_wait_reset(struct device *dev, struct dw_mci *host) 1821f95f3850SWill Newton { 1822f95f3850SWill Newton unsigned long timeout = jiffies + msecs_to_jiffies(500); 1823f95f3850SWill Newton unsigned int ctrl; 1824f95f3850SWill Newton 1825f95f3850SWill Newton mci_writel(host, CTRL, (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | 1826f95f3850SWill Newton SDMMC_CTRL_DMA_RESET)); 1827f95f3850SWill Newton 1828f95f3850SWill Newton /* wait till resets clear */ 1829f95f3850SWill Newton do { 1830f95f3850SWill Newton ctrl = mci_readl(host, CTRL); 1831f95f3850SWill Newton if (!(ctrl & (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | 1832f95f3850SWill Newton SDMMC_CTRL_DMA_RESET))) 1833f95f3850SWill Newton return true; 1834f95f3850SWill Newton } while (time_before(jiffies, timeout)); 1835f95f3850SWill Newton 1836f95f3850SWill Newton dev_err(dev, "Timeout resetting block (ctrl %#x)\n", ctrl); 1837f95f3850SWill Newton 1838f95f3850SWill Newton return false; 1839f95f3850SWill Newton } 1840f95f3850SWill Newton 1841f95f3850SWill Newton static int dw_mci_probe(struct platform_device *pdev) 1842f95f3850SWill Newton { 1843f95f3850SWill Newton struct dw_mci *host; 1844f95f3850SWill Newton struct resource *regs; 1845f95f3850SWill Newton struct dw_mci_board *pdata; 1846f95f3850SWill Newton int irq, ret, i, width; 1847f95f3850SWill Newton u32 fifo_size; 1848f95f3850SWill Newton 1849f95f3850SWill Newton regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1850f95f3850SWill Newton if (!regs) 1851f95f3850SWill Newton return -ENXIO; 1852f95f3850SWill Newton 1853f95f3850SWill Newton irq = platform_get_irq(pdev, 0); 1854f95f3850SWill Newton if (irq < 0) 1855f95f3850SWill Newton return irq; 1856f95f3850SWill Newton 1857f95f3850SWill Newton host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL); 1858f95f3850SWill Newton if (!host) 1859f95f3850SWill Newton return -ENOMEM; 1860f95f3850SWill Newton 1861f95f3850SWill Newton host->pdev = pdev; 1862f95f3850SWill Newton host->pdata = pdata = pdev->dev.platform_data; 1863f95f3850SWill Newton if (!pdata || !pdata->init) { 1864f95f3850SWill Newton dev_err(&pdev->dev, 1865f95f3850SWill Newton "Platform data must supply init function\n"); 1866f95f3850SWill Newton ret = -ENODEV; 1867f95f3850SWill Newton goto err_freehost; 1868f95f3850SWill Newton } 1869f95f3850SWill Newton 1870f95f3850SWill Newton if (!pdata->select_slot && pdata->num_slots > 1) { 1871f95f3850SWill Newton dev_err(&pdev->dev, 1872f95f3850SWill Newton "Platform data must supply select_slot function\n"); 1873f95f3850SWill Newton ret = -ENODEV; 1874f95f3850SWill Newton goto err_freehost; 1875f95f3850SWill Newton } 1876f95f3850SWill Newton 1877f95f3850SWill Newton if (!pdata->bus_hz) { 1878f95f3850SWill Newton dev_err(&pdev->dev, 1879f95f3850SWill Newton "Platform data must supply bus speed\n"); 1880f95f3850SWill Newton ret = -ENODEV; 1881f95f3850SWill Newton goto err_freehost; 1882f95f3850SWill Newton } 1883f95f3850SWill Newton 1884f95f3850SWill Newton host->bus_hz = pdata->bus_hz; 1885f95f3850SWill Newton host->quirks = pdata->quirks; 1886f95f3850SWill Newton 1887f95f3850SWill Newton spin_lock_init(&host->lock); 1888f95f3850SWill Newton INIT_LIST_HEAD(&host->queue); 1889f95f3850SWill Newton 1890f95f3850SWill Newton ret = -ENOMEM; 189128f65c11SJoe Perches host->regs = ioremap(regs->start, resource_size(regs)); 1892f95f3850SWill Newton if (!host->regs) 1893f95f3850SWill Newton goto err_freehost; 1894f95f3850SWill Newton 1895f95f3850SWill Newton host->dma_ops = pdata->dma_ops; 1896f95f3850SWill Newton dw_mci_init_dma(host); 1897f95f3850SWill Newton 1898f95f3850SWill Newton /* 1899f95f3850SWill Newton * Get the host data width - this assumes that HCON has been set with 1900f95f3850SWill Newton * the correct values. 1901f95f3850SWill Newton */ 1902f95f3850SWill Newton i = (mci_readl(host, HCON) >> 7) & 0x7; 1903f95f3850SWill Newton if (!i) { 1904f95f3850SWill Newton host->push_data = dw_mci_push_data16; 1905f95f3850SWill Newton host->pull_data = dw_mci_pull_data16; 1906f95f3850SWill Newton width = 16; 1907f95f3850SWill Newton host->data_shift = 1; 1908f95f3850SWill Newton } else if (i == 2) { 1909f95f3850SWill Newton host->push_data = dw_mci_push_data64; 1910f95f3850SWill Newton host->pull_data = dw_mci_pull_data64; 1911f95f3850SWill Newton width = 64; 1912f95f3850SWill Newton host->data_shift = 3; 1913f95f3850SWill Newton } else { 1914f95f3850SWill Newton /* Check for a reserved value, and warn if it is */ 1915f95f3850SWill Newton WARN((i != 1), 1916f95f3850SWill Newton "HCON reports a reserved host data width!\n" 1917f95f3850SWill Newton "Defaulting to 32-bit access.\n"); 1918f95f3850SWill Newton host->push_data = dw_mci_push_data32; 1919f95f3850SWill Newton host->pull_data = dw_mci_pull_data32; 1920f95f3850SWill Newton width = 32; 1921f95f3850SWill Newton host->data_shift = 2; 1922f95f3850SWill Newton } 1923f95f3850SWill Newton 1924f95f3850SWill Newton /* Reset all blocks */ 1925f95f3850SWill Newton if (!mci_wait_reset(&pdev->dev, host)) { 1926f95f3850SWill Newton ret = -ENODEV; 1927f95f3850SWill Newton goto err_dmaunmap; 1928f95f3850SWill Newton } 1929f95f3850SWill Newton 1930f95f3850SWill Newton /* Clear the interrupts for the host controller */ 1931f95f3850SWill Newton mci_writel(host, RINTSTS, 0xFFFFFFFF); 1932f95f3850SWill Newton mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ 1933f95f3850SWill Newton 1934f95f3850SWill Newton /* Put in max timeout */ 1935f95f3850SWill Newton mci_writel(host, TMOUT, 0xFFFFFFFF); 1936f95f3850SWill Newton 1937f95f3850SWill Newton /* 1938f95f3850SWill Newton * FIFO threshold settings RxMark = fifo_size / 2 - 1, 1939f95f3850SWill Newton * Tx Mark = fifo_size / 2 DMA Size = 8 1940f95f3850SWill Newton */ 1941b86d8253SJames Hogan if (!host->pdata->fifo_depth) { 1942b86d8253SJames Hogan /* 1943b86d8253SJames Hogan * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may 1944b86d8253SJames Hogan * have been overwritten by the bootloader, just like we're 1945b86d8253SJames Hogan * about to do, so if you know the value for your hardware, you 1946b86d8253SJames Hogan * should put it in the platform data. 1947b86d8253SJames Hogan */ 1948f95f3850SWill Newton fifo_size = mci_readl(host, FIFOTH); 1949b86d8253SJames Hogan fifo_size = 1 + ((fifo_size >> 16) & 0x7ff); 1950b86d8253SJames Hogan } else { 1951b86d8253SJames Hogan fifo_size = host->pdata->fifo_depth; 1952b86d8253SJames Hogan } 1953b86d8253SJames Hogan host->fifo_depth = fifo_size; 1954e61cf118SJaehoon Chung host->fifoth_val = ((0x2 << 28) | ((fifo_size/2 - 1) << 16) | 1955e61cf118SJaehoon Chung ((fifo_size/2) << 0)); 1956e61cf118SJaehoon Chung mci_writel(host, FIFOTH, host->fifoth_val); 1957f95f3850SWill Newton 1958f95f3850SWill Newton /* disable clock to CIU */ 1959f95f3850SWill Newton mci_writel(host, CLKENA, 0); 1960f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 1961f95f3850SWill Newton 1962f95f3850SWill Newton tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); 19631791b13eSJames Hogan dw_mci_card_workqueue = alloc_workqueue("dw-mci-card", 19641791b13eSJames Hogan WQ_MEM_RECLAIM | WQ_NON_REENTRANT, 1); 19651791b13eSJames Hogan if (!dw_mci_card_workqueue) 19661791b13eSJames Hogan goto err_dmaunmap; 19671791b13eSJames Hogan INIT_WORK(&host->card_work, dw_mci_work_routine_card); 1968f95f3850SWill Newton 1969f95f3850SWill Newton ret = request_irq(irq, dw_mci_interrupt, 0, "dw-mci", host); 1970f95f3850SWill Newton if (ret) 19711791b13eSJames Hogan goto err_workqueue; 1972f95f3850SWill Newton 1973f95f3850SWill Newton platform_set_drvdata(pdev, host); 1974f95f3850SWill Newton 1975f95f3850SWill Newton if (host->pdata->num_slots) 1976f95f3850SWill Newton host->num_slots = host->pdata->num_slots; 1977f95f3850SWill Newton else 1978f95f3850SWill Newton host->num_slots = ((mci_readl(host, HCON) >> 1) & 0x1F) + 1; 1979f95f3850SWill Newton 1980f95f3850SWill Newton /* We need at least one slot to succeed */ 1981f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 1982f95f3850SWill Newton ret = dw_mci_init_slot(host, i); 1983f95f3850SWill Newton if (ret) { 1984f95f3850SWill Newton ret = -ENODEV; 1985f95f3850SWill Newton goto err_init_slot; 1986f95f3850SWill Newton } 1987f95f3850SWill Newton } 1988f95f3850SWill Newton 1989f95f3850SWill Newton /* 19904e0a5adfSJaehoon Chung * In 2.40a spec, Data offset is changed. 19914e0a5adfSJaehoon Chung * Need to check the version-id and set data-offset for DATA register. 19924e0a5adfSJaehoon Chung */ 19934e0a5adfSJaehoon Chung host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); 19944e0a5adfSJaehoon Chung dev_info(&pdev->dev, "Version ID is %04x\n", host->verid); 19954e0a5adfSJaehoon Chung 19964e0a5adfSJaehoon Chung if (host->verid < DW_MMC_240A) 19974e0a5adfSJaehoon Chung host->data_offset = DATA_OFFSET; 19984e0a5adfSJaehoon Chung else 19994e0a5adfSJaehoon Chung host->data_offset = DATA_240A_OFFSET; 20004e0a5adfSJaehoon Chung 20014e0a5adfSJaehoon Chung /* 2002f95f3850SWill Newton * Enable interrupts for command done, data over, data empty, card det, 2003f95f3850SWill Newton * receive ready and error such as transmit, receive timeout, crc error 2004f95f3850SWill Newton */ 2005f95f3850SWill Newton mci_writel(host, RINTSTS, 0xFFFFFFFF); 2006f95f3850SWill Newton mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | 2007f95f3850SWill Newton SDMMC_INT_TXDR | SDMMC_INT_RXDR | 2008f95f3850SWill Newton DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); 2009f95f3850SWill Newton mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */ 2010f95f3850SWill Newton 2011f95f3850SWill Newton dev_info(&pdev->dev, "DW MMC controller at irq %d, " 2012b86d8253SJames Hogan "%d bit host data width, " 2013b86d8253SJames Hogan "%u deep fifo\n", 2014b86d8253SJames Hogan irq, width, fifo_size); 2015f95f3850SWill Newton if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) 2016f95f3850SWill Newton dev_info(&pdev->dev, "Internal DMAC interrupt fix enabled.\n"); 2017f95f3850SWill Newton 2018f95f3850SWill Newton return 0; 2019f95f3850SWill Newton 2020f95f3850SWill Newton err_init_slot: 2021f95f3850SWill Newton /* De-init any initialized slots */ 2022f95f3850SWill Newton while (i > 0) { 2023f95f3850SWill Newton if (host->slot[i]) 2024f95f3850SWill Newton dw_mci_cleanup_slot(host->slot[i], i); 2025f95f3850SWill Newton i--; 2026f95f3850SWill Newton } 2027f95f3850SWill Newton free_irq(irq, host); 2028f95f3850SWill Newton 20291791b13eSJames Hogan err_workqueue: 20301791b13eSJames Hogan destroy_workqueue(dw_mci_card_workqueue); 20311791b13eSJames Hogan 2032f95f3850SWill Newton err_dmaunmap: 2033f95f3850SWill Newton if (host->use_dma && host->dma_ops->exit) 2034f95f3850SWill Newton host->dma_ops->exit(host); 2035f95f3850SWill Newton dma_free_coherent(&host->pdev->dev, PAGE_SIZE, 2036f95f3850SWill Newton host->sg_cpu, host->sg_dma); 2037f95f3850SWill Newton iounmap(host->regs); 2038f95f3850SWill Newton 2039c07946a3SJaehoon Chung if (host->vmmc) { 2040c07946a3SJaehoon Chung regulator_disable(host->vmmc); 2041c07946a3SJaehoon Chung regulator_put(host->vmmc); 2042c07946a3SJaehoon Chung } 2043c07946a3SJaehoon Chung 2044c07946a3SJaehoon Chung 2045f95f3850SWill Newton err_freehost: 2046f95f3850SWill Newton kfree(host); 2047f95f3850SWill Newton return ret; 2048f95f3850SWill Newton } 2049f95f3850SWill Newton 2050f95f3850SWill Newton static int __exit dw_mci_remove(struct platform_device *pdev) 2051f95f3850SWill Newton { 2052f95f3850SWill Newton struct dw_mci *host = platform_get_drvdata(pdev); 2053f95f3850SWill Newton int i; 2054f95f3850SWill Newton 2055f95f3850SWill Newton mci_writel(host, RINTSTS, 0xFFFFFFFF); 2056f95f3850SWill Newton mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ 2057f95f3850SWill Newton 2058f95f3850SWill Newton platform_set_drvdata(pdev, NULL); 2059f95f3850SWill Newton 2060f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 2061f95f3850SWill Newton dev_dbg(&pdev->dev, "remove slot %d\n", i); 2062f95f3850SWill Newton if (host->slot[i]) 2063f95f3850SWill Newton dw_mci_cleanup_slot(host->slot[i], i); 2064f95f3850SWill Newton } 2065f95f3850SWill Newton 2066f95f3850SWill Newton /* disable clock to CIU */ 2067f95f3850SWill Newton mci_writel(host, CLKENA, 0); 2068f95f3850SWill Newton mci_writel(host, CLKSRC, 0); 2069f95f3850SWill Newton 2070f95f3850SWill Newton free_irq(platform_get_irq(pdev, 0), host); 20711791b13eSJames Hogan destroy_workqueue(dw_mci_card_workqueue); 2072f95f3850SWill Newton dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); 2073f95f3850SWill Newton 2074f95f3850SWill Newton if (host->use_dma && host->dma_ops->exit) 2075f95f3850SWill Newton host->dma_ops->exit(host); 2076f95f3850SWill Newton 2077c07946a3SJaehoon Chung if (host->vmmc) { 2078c07946a3SJaehoon Chung regulator_disable(host->vmmc); 2079c07946a3SJaehoon Chung regulator_put(host->vmmc); 2080c07946a3SJaehoon Chung } 2081c07946a3SJaehoon Chung 2082f95f3850SWill Newton iounmap(host->regs); 2083f95f3850SWill Newton 2084f95f3850SWill Newton kfree(host); 2085f95f3850SWill Newton return 0; 2086f95f3850SWill Newton } 2087f95f3850SWill Newton 20886fe8890dSJaehoon Chung #ifdef CONFIG_PM_SLEEP 2089f95f3850SWill Newton /* 2090f95f3850SWill Newton * TODO: we should probably disable the clock to the card in the suspend path. 2091f95f3850SWill Newton */ 20926fe8890dSJaehoon Chung static int dw_mci_suspend(struct device *dev) 2093f95f3850SWill Newton { 2094f95f3850SWill Newton int i, ret; 20956fe8890dSJaehoon Chung struct dw_mci *host = dev_get_drvdata(dev); 2096f95f3850SWill Newton 2097f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 2098f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 2099f95f3850SWill Newton if (!slot) 2100f95f3850SWill Newton continue; 2101f95f3850SWill Newton ret = mmc_suspend_host(slot->mmc); 2102f95f3850SWill Newton if (ret < 0) { 2103f95f3850SWill Newton while (--i >= 0) { 2104f95f3850SWill Newton slot = host->slot[i]; 2105f95f3850SWill Newton if (slot) 2106f95f3850SWill Newton mmc_resume_host(host->slot[i]->mmc); 2107f95f3850SWill Newton } 2108f95f3850SWill Newton return ret; 2109f95f3850SWill Newton } 2110f95f3850SWill Newton } 2111f95f3850SWill Newton 2112c07946a3SJaehoon Chung if (host->vmmc) 2113c07946a3SJaehoon Chung regulator_disable(host->vmmc); 2114c07946a3SJaehoon Chung 2115f95f3850SWill Newton return 0; 2116f95f3850SWill Newton } 2117f95f3850SWill Newton 21186fe8890dSJaehoon Chung static int dw_mci_resume(struct device *dev) 2119f95f3850SWill Newton { 2120f95f3850SWill Newton int i, ret; 21216fe8890dSJaehoon Chung struct dw_mci *host = dev_get_drvdata(dev); 2122f95f3850SWill Newton 21231d6c4e0aSJaehoon Chung if (host->vmmc) 21241d6c4e0aSJaehoon Chung regulator_enable(host->vmmc); 21251d6c4e0aSJaehoon Chung 2126e61cf118SJaehoon Chung if (host->dma_ops->init) 2127e61cf118SJaehoon Chung host->dma_ops->init(host); 2128e61cf118SJaehoon Chung 21296fe8890dSJaehoon Chung if (!mci_wait_reset(dev, host)) { 2130e61cf118SJaehoon Chung ret = -ENODEV; 2131e61cf118SJaehoon Chung return ret; 2132e61cf118SJaehoon Chung } 2133e61cf118SJaehoon Chung 2134e61cf118SJaehoon Chung /* Restore the old value at FIFOTH register */ 2135e61cf118SJaehoon Chung mci_writel(host, FIFOTH, host->fifoth_val); 2136e61cf118SJaehoon Chung 2137e61cf118SJaehoon Chung mci_writel(host, RINTSTS, 0xFFFFFFFF); 2138e61cf118SJaehoon Chung mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | 2139e61cf118SJaehoon Chung SDMMC_INT_TXDR | SDMMC_INT_RXDR | 2140e61cf118SJaehoon Chung DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); 2141e61cf118SJaehoon Chung mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); 2142e61cf118SJaehoon Chung 2143f95f3850SWill Newton for (i = 0; i < host->num_slots; i++) { 2144f95f3850SWill Newton struct dw_mci_slot *slot = host->slot[i]; 2145f95f3850SWill Newton if (!slot) 2146f95f3850SWill Newton continue; 2147f95f3850SWill Newton ret = mmc_resume_host(host->slot[i]->mmc); 2148f95f3850SWill Newton if (ret < 0) 2149f95f3850SWill Newton return ret; 2150f95f3850SWill Newton } 2151f95f3850SWill Newton 2152f95f3850SWill Newton return 0; 2153f95f3850SWill Newton } 2154f95f3850SWill Newton #else 2155f95f3850SWill Newton #define dw_mci_suspend NULL 2156f95f3850SWill Newton #define dw_mci_resume NULL 21576fe8890dSJaehoon Chung #endif /* CONFIG_PM_SLEEP */ 21586fe8890dSJaehoon Chung 21596fe8890dSJaehoon Chung static SIMPLE_DEV_PM_OPS(dw_mci_pmops, dw_mci_suspend, dw_mci_resume); 2160f95f3850SWill Newton 2161f95f3850SWill Newton static struct platform_driver dw_mci_driver = { 2162f95f3850SWill Newton .remove = __exit_p(dw_mci_remove), 2163f95f3850SWill Newton .driver = { 2164f95f3850SWill Newton .name = "dw_mmc", 21656fe8890dSJaehoon Chung .pm = &dw_mci_pmops, 2166f95f3850SWill Newton }, 2167f95f3850SWill Newton }; 2168f95f3850SWill Newton 2169f95f3850SWill Newton static int __init dw_mci_init(void) 2170f95f3850SWill Newton { 2171f95f3850SWill Newton return platform_driver_probe(&dw_mci_driver, dw_mci_probe); 2172f95f3850SWill Newton } 2173f95f3850SWill Newton 2174f95f3850SWill Newton static void __exit dw_mci_exit(void) 2175f95f3850SWill Newton { 2176f95f3850SWill Newton platform_driver_unregister(&dw_mci_driver); 2177f95f3850SWill Newton } 2178f95f3850SWill Newton 2179f95f3850SWill Newton module_init(dw_mci_init); 2180f95f3850SWill Newton module_exit(dw_mci_exit); 2181f95f3850SWill Newton 2182f95f3850SWill Newton MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 2183f95f3850SWill Newton MODULE_AUTHOR("NXP Semiconductor VietNam"); 2184f95f3850SWill Newton MODULE_AUTHOR("Imagination Technologies Ltd"); 2185f95f3850SWill Newton MODULE_LICENSE("GPL v2"); 2186