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- /*
- * tifm_sd.c - TI FlashMedia driver
- *
- * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Special thanks to Brad Campbell for extensive testing of this driver.
- *
- */
- #include <linux/tifm.h>
- #include <linux/mmc/host.h>
- #include <linux/highmem.h>
- #include <linux/scatterlist.h>
- #include <linux/module.h>
- #include <asm/io.h>
- #define DRIVER_NAME "tifm_sd"
- #define DRIVER_VERSION "0.8"
- static bool no_dma = 0;
- static bool fixed_timeout = 0;
- module_param(no_dma, bool, 0644);
- module_param(fixed_timeout, bool, 0644);
- /* Constants here are mostly from OMAP5912 datasheet */
- #define TIFM_MMCSD_RESET 0x0002
- #define TIFM_MMCSD_CLKMASK 0x03ff
- #define TIFM_MMCSD_POWER 0x0800
- #define TIFM_MMCSD_4BBUS 0x8000
- #define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */
- #define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */
- #define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */
- #define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */
- #define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */
- #define TIFM_MMCSD_READ 0x8000
- #define TIFM_MMCSD_ERRMASK 0x01e0 /* set bits: CCRC, CTO, DCRC, DTO */
- #define TIFM_MMCSD_EOC 0x0001 /* end of command phase */
- #define TIFM_MMCSD_CD 0x0002 /* card detect */
- #define TIFM_MMCSD_CB 0x0004 /* card enter busy state */
- #define TIFM_MMCSD_BRS 0x0008 /* block received/sent */
- #define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */
- #define TIFM_MMCSD_DTO 0x0020 /* data time-out */
- #define TIFM_MMCSD_DCRC 0x0040 /* data crc error */
- #define TIFM_MMCSD_CTO 0x0080 /* command time-out */
- #define TIFM_MMCSD_CCRC 0x0100 /* command crc error */
- #define TIFM_MMCSD_AF 0x0400 /* fifo almost full */
- #define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */
- #define TIFM_MMCSD_OCRB 0x1000 /* OCR busy */
- #define TIFM_MMCSD_CIRQ 0x2000 /* card irq (cmd40/sdio) */
- #define TIFM_MMCSD_CERR 0x4000 /* card status error */
- #define TIFM_MMCSD_ODTO 0x0040 /* open drain / extended timeout */
- #define TIFM_MMCSD_CARD_RO 0x0200 /* card is read-only */
- #define TIFM_MMCSD_FIFO_SIZE 0x0020
- #define TIFM_MMCSD_RSP_R0 0x0000
- #define TIFM_MMCSD_RSP_R1 0x0100
- #define TIFM_MMCSD_RSP_R2 0x0200
- #define TIFM_MMCSD_RSP_R3 0x0300
- #define TIFM_MMCSD_RSP_R4 0x0400
- #define TIFM_MMCSD_RSP_R5 0x0500
- #define TIFM_MMCSD_RSP_R6 0x0600
- #define TIFM_MMCSD_RSP_BUSY 0x0800
- #define TIFM_MMCSD_CMD_BC 0x0000
- #define TIFM_MMCSD_CMD_BCR 0x1000
- #define TIFM_MMCSD_CMD_AC 0x2000
- #define TIFM_MMCSD_CMD_ADTC 0x3000
- #define TIFM_MMCSD_MAX_BLOCK_SIZE 0x0800UL
- enum {
- CMD_READY = 0x0001,
- FIFO_READY = 0x0002,
- BRS_READY = 0x0004,
- SCMD_ACTIVE = 0x0008,
- SCMD_READY = 0x0010,
- CARD_BUSY = 0x0020,
- DATA_CARRY = 0x0040
- };
- struct tifm_sd {
- struct tifm_dev *dev;
- unsigned short eject:1,
- open_drain:1,
- no_dma:1;
- unsigned short cmd_flags;
- unsigned int clk_freq;
- unsigned int clk_div;
- unsigned long timeout_jiffies;
- struct tasklet_struct finish_tasklet;
- struct timer_list timer;
- struct mmc_request *req;
- int sg_len;
- int sg_pos;
- unsigned int block_pos;
- struct scatterlist bounce_buf;
- unsigned char bounce_buf_data[TIFM_MMCSD_MAX_BLOCK_SIZE];
- };
- /* for some reason, host won't respond correctly to readw/writew */
- static void tifm_sd_read_fifo(struct tifm_sd *host, struct page *pg,
- unsigned int off, unsigned int cnt)
- {
- struct tifm_dev *sock = host->dev;
- unsigned char *buf;
- unsigned int pos = 0, val;
- buf = kmap_atomic(pg) + off;
- if (host->cmd_flags & DATA_CARRY) {
- buf[pos++] = host->bounce_buf_data[0];
- host->cmd_flags &= ~DATA_CARRY;
- }
- while (pos < cnt) {
- val = readl(sock->addr + SOCK_MMCSD_DATA);
- buf[pos++] = val & 0xff;
- if (pos == cnt) {
- host->bounce_buf_data[0] = (val >> 8) & 0xff;
- host->cmd_flags |= DATA_CARRY;
- break;
- }
- buf[pos++] = (val >> 8) & 0xff;
- }
- kunmap_atomic(buf - off);
- }
- static void tifm_sd_write_fifo(struct tifm_sd *host, struct page *pg,
- unsigned int off, unsigned int cnt)
- {
- struct tifm_dev *sock = host->dev;
- unsigned char *buf;
- unsigned int pos = 0, val;
- buf = kmap_atomic(pg) + off;
- if (host->cmd_flags & DATA_CARRY) {
- val = host->bounce_buf_data[0] | ((buf[pos++] << 8) & 0xff00);
- writel(val, sock->addr + SOCK_MMCSD_DATA);
- host->cmd_flags &= ~DATA_CARRY;
- }
- while (pos < cnt) {
- val = buf[pos++];
- if (pos == cnt) {
- host->bounce_buf_data[0] = val & 0xff;
- host->cmd_flags |= DATA_CARRY;
- break;
- }
- val |= (buf[pos++] << 8) & 0xff00;
- writel(val, sock->addr + SOCK_MMCSD_DATA);
- }
- kunmap_atomic(buf - off);
- }
- static void tifm_sd_transfer_data(struct tifm_sd *host)
- {
- struct mmc_data *r_data = host->req->cmd->data;
- struct scatterlist *sg = r_data->sg;
- unsigned int off, cnt, t_size = TIFM_MMCSD_FIFO_SIZE * 2;
- unsigned int p_off, p_cnt;
- struct page *pg;
- if (host->sg_pos == host->sg_len)
- return;
- while (t_size) {
- cnt = sg[host->sg_pos].length - host->block_pos;
- if (!cnt) {
- host->block_pos = 0;
- host->sg_pos++;
- if (host->sg_pos == host->sg_len) {
- if ((r_data->flags & MMC_DATA_WRITE)
- && (host->cmd_flags & DATA_CARRY))
- writel(host->bounce_buf_data[0],
- host->dev->addr
- + SOCK_MMCSD_DATA);
- return;
- }
- cnt = sg[host->sg_pos].length;
- }
- off = sg[host->sg_pos].offset + host->block_pos;
- pg = nth_page(sg_page(&sg[host->sg_pos]), off >> PAGE_SHIFT);
- p_off = offset_in_page(off);
- p_cnt = PAGE_SIZE - p_off;
- p_cnt = min(p_cnt, cnt);
- p_cnt = min(p_cnt, t_size);
- if (r_data->flags & MMC_DATA_READ)
- tifm_sd_read_fifo(host, pg, p_off, p_cnt);
- else if (r_data->flags & MMC_DATA_WRITE)
- tifm_sd_write_fifo(host, pg, p_off, p_cnt);
- t_size -= p_cnt;
- host->block_pos += p_cnt;
- }
- }
- static void tifm_sd_copy_page(struct page *dst, unsigned int dst_off,
- struct page *src, unsigned int src_off,
- unsigned int count)
- {
- unsigned char *src_buf = kmap_atomic(src) + src_off;
- unsigned char *dst_buf = kmap_atomic(dst) + dst_off;
- memcpy(dst_buf, src_buf, count);
- kunmap_atomic(dst_buf - dst_off);
- kunmap_atomic(src_buf - src_off);
- }
- static void tifm_sd_bounce_block(struct tifm_sd *host, struct mmc_data *r_data)
- {
- struct scatterlist *sg = r_data->sg;
- unsigned int t_size = r_data->blksz;
- unsigned int off, cnt;
- unsigned int p_off, p_cnt;
- struct page *pg;
- dev_dbg(&host->dev->dev, "bouncing block\n");
- while (t_size) {
- cnt = sg[host->sg_pos].length - host->block_pos;
- if (!cnt) {
- host->block_pos = 0;
- host->sg_pos++;
- if (host->sg_pos == host->sg_len)
- return;
- cnt = sg[host->sg_pos].length;
- }
- off = sg[host->sg_pos].offset + host->block_pos;
- pg = nth_page(sg_page(&sg[host->sg_pos]), off >> PAGE_SHIFT);
- p_off = offset_in_page(off);
- p_cnt = PAGE_SIZE - p_off;
- p_cnt = min(p_cnt, cnt);
- p_cnt = min(p_cnt, t_size);
- if (r_data->flags & MMC_DATA_WRITE)
- tifm_sd_copy_page(sg_page(&host->bounce_buf),
- r_data->blksz - t_size,
- pg, p_off, p_cnt);
- else if (r_data->flags & MMC_DATA_READ)
- tifm_sd_copy_page(pg, p_off, sg_page(&host->bounce_buf),
- r_data->blksz - t_size, p_cnt);
- t_size -= p_cnt;
- host->block_pos += p_cnt;
- }
- }
- static int tifm_sd_set_dma_data(struct tifm_sd *host, struct mmc_data *r_data)
- {
- struct tifm_dev *sock = host->dev;
- unsigned int t_size = TIFM_DMA_TSIZE * r_data->blksz;
- unsigned int dma_len, dma_blk_cnt, dma_off;
- struct scatterlist *sg = NULL;
- unsigned long flags;
- if (host->sg_pos == host->sg_len)
- return 1;
- if (host->cmd_flags & DATA_CARRY) {
- host->cmd_flags &= ~DATA_CARRY;
- local_irq_save(flags);
- tifm_sd_bounce_block(host, r_data);
- local_irq_restore(flags);
- if (host->sg_pos == host->sg_len)
- return 1;
- }
- dma_len = sg_dma_len(&r_data->sg[host->sg_pos]) - host->block_pos;
- if (!dma_len) {
- host->block_pos = 0;
- host->sg_pos++;
- if (host->sg_pos == host->sg_len)
- return 1;
- dma_len = sg_dma_len(&r_data->sg[host->sg_pos]);
- }
- if (dma_len < t_size) {
- dma_blk_cnt = dma_len / r_data->blksz;
- dma_off = host->block_pos;
- host->block_pos += dma_blk_cnt * r_data->blksz;
- } else {
- dma_blk_cnt = TIFM_DMA_TSIZE;
- dma_off = host->block_pos;
- host->block_pos += t_size;
- }
- if (dma_blk_cnt)
- sg = &r_data->sg[host->sg_pos];
- else if (dma_len) {
- if (r_data->flags & MMC_DATA_WRITE) {
- local_irq_save(flags);
- tifm_sd_bounce_block(host, r_data);
- local_irq_restore(flags);
- } else
- host->cmd_flags |= DATA_CARRY;
- sg = &host->bounce_buf;
- dma_off = 0;
- dma_blk_cnt = 1;
- } else
- return 1;
- dev_dbg(&sock->dev, "setting dma for %d blocks\n", dma_blk_cnt);
- writel(sg_dma_address(sg) + dma_off, sock->addr + SOCK_DMA_ADDRESS);
- if (r_data->flags & MMC_DATA_WRITE)
- writel((dma_blk_cnt << 8) | TIFM_DMA_TX | TIFM_DMA_EN,
- sock->addr + SOCK_DMA_CONTROL);
- else
- writel((dma_blk_cnt << 8) | TIFM_DMA_EN,
- sock->addr + SOCK_DMA_CONTROL);
- return 0;
- }
- static unsigned int tifm_sd_op_flags(struct mmc_command *cmd)
- {
- unsigned int rc = 0;
- switch (mmc_resp_type(cmd)) {
- case MMC_RSP_NONE:
- rc |= TIFM_MMCSD_RSP_R0;
- break;
- case MMC_RSP_R1B:
- rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through
- case MMC_RSP_R1:
- rc |= TIFM_MMCSD_RSP_R1;
- break;
- case MMC_RSP_R2:
- rc |= TIFM_MMCSD_RSP_R2;
- break;
- case MMC_RSP_R3:
- rc |= TIFM_MMCSD_RSP_R3;
- break;
- default:
- BUG();
- }
- switch (mmc_cmd_type(cmd)) {
- case MMC_CMD_BC:
- rc |= TIFM_MMCSD_CMD_BC;
- break;
- case MMC_CMD_BCR:
- rc |= TIFM_MMCSD_CMD_BCR;
- break;
- case MMC_CMD_AC:
- rc |= TIFM_MMCSD_CMD_AC;
- break;
- case MMC_CMD_ADTC:
- rc |= TIFM_MMCSD_CMD_ADTC;
- break;
- default:
- BUG();
- }
- return rc;
- }
- static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd)
- {
- struct tifm_dev *sock = host->dev;
- unsigned int cmd_mask = tifm_sd_op_flags(cmd);
- if (host->open_drain)
- cmd_mask |= TIFM_MMCSD_ODTO;
- if (cmd->data && (cmd->data->flags & MMC_DATA_READ))
- cmd_mask |= TIFM_MMCSD_READ;
- dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n",
- cmd->opcode, cmd->arg, cmd_mask);
- writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH);
- writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW);
- writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND);
- }
- static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock)
- {
- cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16)
- | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18);
- cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16)
- | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10);
- cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16)
- | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08);
- cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16)
- | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00);
- }
- static void tifm_sd_check_status(struct tifm_sd *host)
- {
- struct tifm_dev *sock = host->dev;
- struct mmc_command *cmd = host->req->cmd;
- if (cmd->error)
- goto finish_request;
- if (!(host->cmd_flags & CMD_READY))
- return;
- if (cmd->data) {
- if (cmd->data->error) {
- if ((host->cmd_flags & SCMD_ACTIVE)
- && !(host->cmd_flags & SCMD_READY))
- return;
- goto finish_request;
- }
- if (!(host->cmd_flags & BRS_READY))
- return;
- if (!(host->no_dma || (host->cmd_flags & FIFO_READY)))
- return;
- if (cmd->data->flags & MMC_DATA_WRITE) {
- if (host->req->stop) {
- if (!(host->cmd_flags & SCMD_ACTIVE)) {
- host->cmd_flags |= SCMD_ACTIVE;
- writel(TIFM_MMCSD_EOFB
- | readl(sock->addr
- + SOCK_MMCSD_INT_ENABLE),
- sock->addr
- + SOCK_MMCSD_INT_ENABLE);
- tifm_sd_exec(host, host->req->stop);
- return;
- } else {
- if (!(host->cmd_flags & SCMD_READY)
- || (host->cmd_flags & CARD_BUSY))
- return;
- writel((~TIFM_MMCSD_EOFB)
- & readl(sock->addr
- + SOCK_MMCSD_INT_ENABLE),
- sock->addr
- + SOCK_MMCSD_INT_ENABLE);
- }
- } else {
- if (host->cmd_flags & CARD_BUSY)
- return;
- writel((~TIFM_MMCSD_EOFB)
- & readl(sock->addr
- + SOCK_MMCSD_INT_ENABLE),
- sock->addr + SOCK_MMCSD_INT_ENABLE);
- }
- } else {
- if (host->req->stop) {
- if (!(host->cmd_flags & SCMD_ACTIVE)) {
- host->cmd_flags |= SCMD_ACTIVE;
- tifm_sd_exec(host, host->req->stop);
- return;
- } else {
- if (!(host->cmd_flags & SCMD_READY))
- return;
- }
- }
- }
- }
- finish_request:
- tasklet_schedule(&host->finish_tasklet);
- }
- /* Called from interrupt handler */
- static void tifm_sd_data_event(struct tifm_dev *sock)
- {
- struct tifm_sd *host;
- unsigned int fifo_status = 0;
- struct mmc_data *r_data = NULL;
- spin_lock(&sock->lock);
- host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
- fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
- dev_dbg(&sock->dev, "data event: fifo_status %x, flags %x\n",
- fifo_status, host->cmd_flags);
- if (host->req) {
- r_data = host->req->cmd->data;
- if (r_data && (fifo_status & TIFM_FIFO_READY)) {
- if (tifm_sd_set_dma_data(host, r_data)) {
- host->cmd_flags |= FIFO_READY;
- tifm_sd_check_status(host);
- }
- }
- }
- writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
- spin_unlock(&sock->lock);
- }
- /* Called from interrupt handler */
- static void tifm_sd_card_event(struct tifm_dev *sock)
- {
- struct tifm_sd *host;
- unsigned int host_status = 0;
- int cmd_error = 0;
- struct mmc_command *cmd = NULL;
- unsigned long flags;
- spin_lock(&sock->lock);
- host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
- host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
- dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n",
- host_status, host->cmd_flags);
- if (host->req) {
- cmd = host->req->cmd;
- if (host_status & TIFM_MMCSD_ERRMASK) {
- writel(host_status & TIFM_MMCSD_ERRMASK,
- sock->addr + SOCK_MMCSD_STATUS);
- if (host_status & TIFM_MMCSD_CTO)
- cmd_error = -ETIMEDOUT;
- else if (host_status & TIFM_MMCSD_CCRC)
- cmd_error = -EILSEQ;
- if (cmd->data) {
- if (host_status & TIFM_MMCSD_DTO)
- cmd->data->error = -ETIMEDOUT;
- else if (host_status & TIFM_MMCSD_DCRC)
- cmd->data->error = -EILSEQ;
- }
- writel(TIFM_FIFO_INT_SETALL,
- sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
- writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
- if (host->req->stop) {
- if (host->cmd_flags & SCMD_ACTIVE) {
- host->req->stop->error = cmd_error;
- host->cmd_flags |= SCMD_READY;
- } else {
- cmd->error = cmd_error;
- host->cmd_flags |= SCMD_ACTIVE;
- tifm_sd_exec(host, host->req->stop);
- goto done;
- }
- } else
- cmd->error = cmd_error;
- } else {
- if (host_status & (TIFM_MMCSD_EOC | TIFM_MMCSD_CERR)) {
- if (!(host->cmd_flags & CMD_READY)) {
- host->cmd_flags |= CMD_READY;
- tifm_sd_fetch_resp(cmd, sock);
- } else if (host->cmd_flags & SCMD_ACTIVE) {
- host->cmd_flags |= SCMD_READY;
- tifm_sd_fetch_resp(host->req->stop,
- sock);
- }
- }
- if (host_status & TIFM_MMCSD_BRS)
- host->cmd_flags |= BRS_READY;
- }
- if (host->no_dma && cmd->data) {
- if (host_status & TIFM_MMCSD_AE)
- writel(host_status & TIFM_MMCSD_AE,
- sock->addr + SOCK_MMCSD_STATUS);
- if (host_status & (TIFM_MMCSD_AE | TIFM_MMCSD_AF
- | TIFM_MMCSD_BRS)) {
- local_irq_save(flags);
- tifm_sd_transfer_data(host);
- local_irq_restore(flags);
- host_status &= ~TIFM_MMCSD_AE;
- }
- }
- if (host_status & TIFM_MMCSD_EOFB)
- host->cmd_flags &= ~CARD_BUSY;
- else if (host_status & TIFM_MMCSD_CB)
- host->cmd_flags |= CARD_BUSY;
- tifm_sd_check_status(host);
- }
- done:
- writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
- spin_unlock(&sock->lock);
- }
- static void tifm_sd_set_data_timeout(struct tifm_sd *host,
- struct mmc_data *data)
- {
- struct tifm_dev *sock = host->dev;
- unsigned int data_timeout = data->timeout_clks;
- if (fixed_timeout)
- return;
- data_timeout += data->timeout_ns /
- ((1000000000UL / host->clk_freq) * host->clk_div);
- if (data_timeout < 0xffff) {
- writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
- writel((~TIFM_MMCSD_DPE)
- & readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
- sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
- } else {
- data_timeout = (data_timeout >> 10) + 1;
- if (data_timeout > 0xffff)
- data_timeout = 0; /* set to unlimited */
- writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
- writel(TIFM_MMCSD_DPE
- | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
- sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
- }
- }
- static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
- {
- struct tifm_sd *host = mmc_priv(mmc);
- struct tifm_dev *sock = host->dev;
- unsigned long flags;
- struct mmc_data *r_data = mrq->cmd->data;
- spin_lock_irqsave(&sock->lock, flags);
- if (host->eject) {
- mrq->cmd->error = -ENOMEDIUM;
- goto err_out;
- }
- if (host->req) {
- pr_err("%s : unfinished request detected\n",
- dev_name(&sock->dev));
- mrq->cmd->error = -ETIMEDOUT;
- goto err_out;
- }
- host->cmd_flags = 0;
- host->block_pos = 0;
- host->sg_pos = 0;
- if (mrq->data && !is_power_of_2(mrq->data->blksz))
- host->no_dma = 1;
- else
- host->no_dma = no_dma ? 1 : 0;
- if (r_data) {
- tifm_sd_set_data_timeout(host, r_data);
- if ((r_data->flags & MMC_DATA_WRITE) && !mrq->stop)
- writel(TIFM_MMCSD_EOFB
- | readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
- sock->addr + SOCK_MMCSD_INT_ENABLE);
- if (host->no_dma) {
- writel(TIFM_MMCSD_BUFINT
- | readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
- sock->addr + SOCK_MMCSD_INT_ENABLE);
- writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8)
- | (TIFM_MMCSD_FIFO_SIZE - 1),
- sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
- host->sg_len = r_data->sg_len;
- } else {
- sg_init_one(&host->bounce_buf, host->bounce_buf_data,
- r_data->blksz);
- if(1 != tifm_map_sg(sock, &host->bounce_buf, 1,
- r_data->flags & MMC_DATA_WRITE
- ? PCI_DMA_TODEVICE
- : PCI_DMA_FROMDEVICE)) {
- pr_err("%s : scatterlist map failed\n",
- dev_name(&sock->dev));
- mrq->cmd->error = -ENOMEM;
- goto err_out;
- }
- host->sg_len = tifm_map_sg(sock, r_data->sg,
- r_data->sg_len,
- r_data->flags
- & MMC_DATA_WRITE
- ? PCI_DMA_TODEVICE
- : PCI_DMA_FROMDEVICE);
- if (host->sg_len < 1) {
- pr_err("%s : scatterlist map failed\n",
- dev_name(&sock->dev));
- tifm_unmap_sg(sock, &host->bounce_buf, 1,
- r_data->flags & MMC_DATA_WRITE
- ? PCI_DMA_TODEVICE
- : PCI_DMA_FROMDEVICE);
- mrq->cmd->error = -ENOMEM;
- goto err_out;
- }
- writel(TIFM_FIFO_INT_SETALL,
- sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
- writel(ilog2(r_data->blksz) - 2,
- sock->addr + SOCK_FIFO_PAGE_SIZE);
- writel(TIFM_FIFO_ENABLE,
- sock->addr + SOCK_FIFO_CONTROL);
- writel(TIFM_FIFO_INTMASK,
- sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
- if (r_data->flags & MMC_DATA_WRITE)
- writel(TIFM_MMCSD_TXDE,
- sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
- else
- writel(TIFM_MMCSD_RXDE,
- sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
- tifm_sd_set_dma_data(host, r_data);
- }
- writel(r_data->blocks - 1,
- sock->addr + SOCK_MMCSD_NUM_BLOCKS);
- writel(r_data->blksz - 1,
- sock->addr + SOCK_MMCSD_BLOCK_LEN);
- }
- host->req = mrq;
- mod_timer(&host->timer, jiffies + host->timeout_jiffies);
- writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
- sock->addr + SOCK_CONTROL);
- tifm_sd_exec(host, mrq->cmd);
- spin_unlock_irqrestore(&sock->lock, flags);
- return;
- err_out:
- spin_unlock_irqrestore(&sock->lock, flags);
- mmc_request_done(mmc, mrq);
- }
- static void tifm_sd_end_cmd(unsigned long data)
- {
- struct tifm_sd *host = (struct tifm_sd*)data;
- struct tifm_dev *sock = host->dev;
- struct mmc_host *mmc = tifm_get_drvdata(sock);
- struct mmc_request *mrq;
- struct mmc_data *r_data = NULL;
- unsigned long flags;
- spin_lock_irqsave(&sock->lock, flags);
- del_timer(&host->timer);
- mrq = host->req;
- host->req = NULL;
- if (!mrq) {
- pr_err(" %s : no request to complete?\n",
- dev_name(&sock->dev));
- spin_unlock_irqrestore(&sock->lock, flags);
- return;
- }
- r_data = mrq->cmd->data;
- if (r_data) {
- if (host->no_dma) {
- writel((~TIFM_MMCSD_BUFINT)
- & readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
- sock->addr + SOCK_MMCSD_INT_ENABLE);
- } else {
- tifm_unmap_sg(sock, &host->bounce_buf, 1,
- (r_data->flags & MMC_DATA_WRITE)
- ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
- tifm_unmap_sg(sock, r_data->sg, r_data->sg_len,
- (r_data->flags & MMC_DATA_WRITE)
- ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
- }
- r_data->bytes_xfered = r_data->blocks
- - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1;
- r_data->bytes_xfered *= r_data->blksz;
- r_data->bytes_xfered += r_data->blksz
- - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1;
- }
- writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
- sock->addr + SOCK_CONTROL);
- spin_unlock_irqrestore(&sock->lock, flags);
- mmc_request_done(mmc, mrq);
- }
- static void tifm_sd_abort(unsigned long data)
- {
- struct tifm_sd *host = (struct tifm_sd*)data;
- pr_err("%s : card failed to respond for a long period of time "
- "(%x, %x)\n",
- dev_name(&host->dev->dev), host->req->cmd->opcode, host->cmd_flags);
- tifm_eject(host->dev);
- }
- static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios)
- {
- struct tifm_sd *host = mmc_priv(mmc);
- struct tifm_dev *sock = host->dev;
- unsigned int clk_div1, clk_div2;
- unsigned long flags;
- spin_lock_irqsave(&sock->lock, flags);
- dev_dbg(&sock->dev, "ios: clock = %u, vdd = %x, bus_mode = %x, "
- "chip_select = %x, power_mode = %x, bus_width = %x\n",
- ios->clock, ios->vdd, ios->bus_mode, ios->chip_select,
- ios->power_mode, ios->bus_width);
- if (ios->bus_width == MMC_BUS_WIDTH_4) {
- writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG),
- sock->addr + SOCK_MMCSD_CONFIG);
- } else {
- writel((~TIFM_MMCSD_4BBUS)
- & readl(sock->addr + SOCK_MMCSD_CONFIG),
- sock->addr + SOCK_MMCSD_CONFIG);
- }
- if (ios->clock) {
- clk_div1 = 20000000 / ios->clock;
- if (!clk_div1)
- clk_div1 = 1;
- clk_div2 = 24000000 / ios->clock;
- if (!clk_div2)
- clk_div2 = 1;
- if ((20000000 / clk_div1) > ios->clock)
- clk_div1++;
- if ((24000000 / clk_div2) > ios->clock)
- clk_div2++;
- if ((20000000 / clk_div1) > (24000000 / clk_div2)) {
- host->clk_freq = 20000000;
- host->clk_div = clk_div1;
- writel((~TIFM_CTRL_FAST_CLK)
- & readl(sock->addr + SOCK_CONTROL),
- sock->addr + SOCK_CONTROL);
- } else {
- host->clk_freq = 24000000;
- host->clk_div = clk_div2;
- writel(TIFM_CTRL_FAST_CLK
- | readl(sock->addr + SOCK_CONTROL),
- sock->addr + SOCK_CONTROL);
- }
- } else {
- host->clk_div = 0;
- }
- host->clk_div &= TIFM_MMCSD_CLKMASK;
- writel(host->clk_div
- | ((~TIFM_MMCSD_CLKMASK)
- & readl(sock->addr + SOCK_MMCSD_CONFIG)),
- sock->addr + SOCK_MMCSD_CONFIG);
- host->open_drain = (ios->bus_mode == MMC_BUSMODE_OPENDRAIN);
- /* chip_select : maybe later */
- //vdd
- //power is set before probe / after remove
- spin_unlock_irqrestore(&sock->lock, flags);
- }
- static int tifm_sd_ro(struct mmc_host *mmc)
- {
- int rc = 0;
- struct tifm_sd *host = mmc_priv(mmc);
- struct tifm_dev *sock = host->dev;
- unsigned long flags;
- spin_lock_irqsave(&sock->lock, flags);
- if (TIFM_MMCSD_CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE))
- rc = 1;
- spin_unlock_irqrestore(&sock->lock, flags);
- return rc;
- }
- static const struct mmc_host_ops tifm_sd_ops = {
- .request = tifm_sd_request,
- .set_ios = tifm_sd_ios,
- .get_ro = tifm_sd_ro
- };
- static int tifm_sd_initialize_host(struct tifm_sd *host)
- {
- int rc;
- unsigned int host_status = 0;
- struct tifm_dev *sock = host->dev;
- writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
- mmiowb();
- host->clk_div = 61;
- host->clk_freq = 20000000;
- writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL);
- writel(host->clk_div | TIFM_MMCSD_POWER,
- sock->addr + SOCK_MMCSD_CONFIG);
- /* wait up to 0.51 sec for reset */
- for (rc = 32; rc <= 256; rc <<= 1) {
- if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) {
- rc = 0;
- break;
- }
- msleep(rc);
- }
- if (rc) {
- pr_err("%s : controller failed to reset\n",
- dev_name(&sock->dev));
- return -ENODEV;
- }
- writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
- writel(host->clk_div | TIFM_MMCSD_POWER,
- sock->addr + SOCK_MMCSD_CONFIG);
- writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
- // command timeout fixed to 64 clocks for now
- writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO);
- writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND);
- for (rc = 16; rc <= 64; rc <<= 1) {
- host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
- writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
- if (!(host_status & TIFM_MMCSD_ERRMASK)
- && (host_status & TIFM_MMCSD_EOC)) {
- rc = 0;
- break;
- }
- msleep(rc);
- }
- if (rc) {
- pr_err("%s : card not ready - probe failed on initialization\n",
- dev_name(&sock->dev));
- return -ENODEV;
- }
- writel(TIFM_MMCSD_CERR | TIFM_MMCSD_BRS | TIFM_MMCSD_EOC
- | TIFM_MMCSD_ERRMASK,
- sock->addr + SOCK_MMCSD_INT_ENABLE);
- mmiowb();
- return 0;
- }
- static int tifm_sd_probe(struct tifm_dev *sock)
- {
- struct mmc_host *mmc;
- struct tifm_sd *host;
- int rc = -EIO;
- if (!(TIFM_SOCK_STATE_OCCUPIED
- & readl(sock->addr + SOCK_PRESENT_STATE))) {
- pr_warning("%s : card gone, unexpectedly\n",
- dev_name(&sock->dev));
- return rc;
- }
- mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev);
- if (!mmc)
- return -ENOMEM;
- host = mmc_priv(mmc);
- tifm_set_drvdata(sock, mmc);
- host->dev = sock;
- host->timeout_jiffies = msecs_to_jiffies(1000);
- tasklet_init(&host->finish_tasklet, tifm_sd_end_cmd,
- (unsigned long)host);
- setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host);
- mmc->ops = &tifm_sd_ops;
- mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
- mmc->caps = MMC_CAP_4_BIT_DATA;
- mmc->f_min = 20000000 / 60;
- mmc->f_max = 24000000;
- mmc->max_blk_count = 2048;
- mmc->max_segs = mmc->max_blk_count;
- mmc->max_blk_size = min(TIFM_MMCSD_MAX_BLOCK_SIZE, PAGE_SIZE);
- mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
- mmc->max_req_size = mmc->max_seg_size;
- sock->card_event = tifm_sd_card_event;
- sock->data_event = tifm_sd_data_event;
- rc = tifm_sd_initialize_host(host);
- if (!rc)
- rc = mmc_add_host(mmc);
- if (!rc)
- return 0;
- mmc_free_host(mmc);
- return rc;
- }
- static void tifm_sd_remove(struct tifm_dev *sock)
- {
- struct mmc_host *mmc = tifm_get_drvdata(sock);
- struct tifm_sd *host = mmc_priv(mmc);
- unsigned long flags;
- spin_lock_irqsave(&sock->lock, flags);
- host->eject = 1;
- writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
- mmiowb();
- spin_unlock_irqrestore(&sock->lock, flags);
- tasklet_kill(&host->finish_tasklet);
- spin_lock_irqsave(&sock->lock, flags);
- if (host->req) {
- writel(TIFM_FIFO_INT_SETALL,
- sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
- writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
- host->req->cmd->error = -ENOMEDIUM;
- if (host->req->stop)
- host->req->stop->error = -ENOMEDIUM;
- tasklet_schedule(&host->finish_tasklet);
- }
- spin_unlock_irqrestore(&sock->lock, flags);
- mmc_remove_host(mmc);
- dev_dbg(&sock->dev, "after remove\n");
- mmc_free_host(mmc);
- }
- #ifdef CONFIG_PM
- static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state)
- {
- return mmc_suspend_host(tifm_get_drvdata(sock));
- }
- static int tifm_sd_resume(struct tifm_dev *sock)
- {
- struct mmc_host *mmc = tifm_get_drvdata(sock);
- struct tifm_sd *host = mmc_priv(mmc);
- int rc;
- rc = tifm_sd_initialize_host(host);
- dev_dbg(&sock->dev, "resume initialize %d\n", rc);
- if (rc)
- host->eject = 1;
- else
- rc = mmc_resume_host(mmc);
- return rc;
- }
- #else
- #define tifm_sd_suspend NULL
- #define tifm_sd_resume NULL
- #endif /* CONFIG_PM */
- static struct tifm_device_id tifm_sd_id_tbl[] = {
- { TIFM_TYPE_SD }, { }
- };
- static struct tifm_driver tifm_sd_driver = {
- .driver = {
- .name = DRIVER_NAME,
- .owner = THIS_MODULE
- },
- .id_table = tifm_sd_id_tbl,
- .probe = tifm_sd_probe,
- .remove = tifm_sd_remove,
- .suspend = tifm_sd_suspend,
- .resume = tifm_sd_resume
- };
- static int __init tifm_sd_init(void)
- {
- return tifm_register_driver(&tifm_sd_driver);
- }
- static void __exit tifm_sd_exit(void)
- {
- tifm_unregister_driver(&tifm_sd_driver);
- }
- MODULE_AUTHOR("Alex Dubov");
- MODULE_DESCRIPTION("TI FlashMedia SD driver");
- MODULE_LICENSE("GPL");
- MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl);
- MODULE_VERSION(DRIVER_VERSION);
- module_init(tifm_sd_init);
- module_exit(tifm_sd_exit);
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