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path: root/drivers/mmc/tifm_sd.c
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Diffstat (limited to 'drivers/mmc/tifm_sd.c')
-rw-r--r--drivers/mmc/tifm_sd.c987
1 files changed, 0 insertions, 987 deletions
diff --git a/drivers/mmc/tifm_sd.c b/drivers/mmc/tifm_sd.c
deleted file mode 100644
index 0581d09c58f..00000000000
--- a/drivers/mmc/tifm_sd.c
+++ /dev/null
@@ -1,987 +0,0 @@
-/*
- * 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.
- *
- */
-
-
-#include <linux/tifm.h>
-#include <linux/mmc/protocol.h>
-#include <linux/mmc/host.h>
-#include <linux/highmem.h>
-#include <asm/io.h>
-
-#define DRIVER_NAME "tifm_sd"
-#define DRIVER_VERSION "0.7"
-
-static int no_dma = 0;
-static int 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_DATAMASK 0x401d /* set bits: CERR, EOFB, BRS, CB, EOC */
-#define TIFM_MMCSD_ERRMASK 0x01e0 /* set bits: CCRC, CTO, DCRC, DTO */
-#define TIFM_MMCSD_EOC 0x0001 /* end of command phase */
-#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_CERR 0x4000 /* card status error */
-
-#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
-
-typedef enum {
- IDLE = 0,
- CMD, /* main command ended */
- BRS, /* block transfer finished */
- SCMD, /* stop command ended */
- CARD, /* card left busy state */
- FIFO, /* FIFO operation completed (uncertain) */
- READY
-} card_state_t;
-
-enum {
- FIFO_RDY = 0x0001, /* hardware dependent value */
- EJECT = 0x0004,
- EJECT_DONE = 0x0008,
- CARD_BUSY = 0x0010,
- OPENDRAIN = 0x0040, /* hardware dependent value */
- CARD_EVENT = 0x0100, /* hardware dependent value */
- CARD_RO = 0x0200, /* hardware dependent value */
- FIFO_EVENT = 0x10000 }; /* hardware dependent value */
-
-struct tifm_sd {
- struct tifm_dev *dev;
-
- unsigned int flags;
- card_state_t state;
- 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;
- wait_queue_head_t notify;
-
- size_t written_blocks;
- size_t buffer_size;
- size_t buffer_pos;
-
-};
-
-static char* tifm_sd_data_buffer(struct mmc_data *data)
-{
- return page_address(data->sg->page) + data->sg->offset;
-}
-
-static int tifm_sd_transfer_data(struct tifm_dev *sock, struct tifm_sd *host,
- unsigned int host_status)
-{
- struct mmc_command *cmd = host->req->cmd;
- unsigned int t_val = 0, cnt = 0;
- char *buffer;
-
- if (host_status & TIFM_MMCSD_BRS) {
- /* in non-dma rx mode BRS fires when fifo is still not empty */
- if (no_dma && (cmd->data->flags & MMC_DATA_READ)) {
- buffer = tifm_sd_data_buffer(host->req->data);
- while (host->buffer_size > host->buffer_pos) {
- t_val = readl(sock->addr + SOCK_MMCSD_DATA);
- buffer[host->buffer_pos++] = t_val & 0xff;
- buffer[host->buffer_pos++] =
- (t_val >> 8) & 0xff;
- }
- }
- return 1;
- } else if (no_dma) {
- buffer = tifm_sd_data_buffer(host->req->data);
- if ((cmd->data->flags & MMC_DATA_READ) &&
- (host_status & TIFM_MMCSD_AF)) {
- for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) {
- t_val = readl(sock->addr + SOCK_MMCSD_DATA);
- if (host->buffer_size > host->buffer_pos) {
- buffer[host->buffer_pos++] =
- t_val & 0xff;
- buffer[host->buffer_pos++] =
- (t_val >> 8) & 0xff;
- }
- }
- } else if ((cmd->data->flags & MMC_DATA_WRITE)
- && (host_status & TIFM_MMCSD_AE)) {
- for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) {
- if (host->buffer_size > host->buffer_pos) {
- t_val = buffer[host->buffer_pos++]
- & 0x00ff;
- t_val |= ((buffer[host->buffer_pos++])
- << 8) & 0xff00;
- writel(t_val,
- sock->addr + SOCK_MMCSD_DATA);
- }
- }
- }
- }
- 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) |
- (host->flags & OPENDRAIN);
-
- 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_process_cmd(struct tifm_dev *sock, struct tifm_sd *host,
- unsigned int host_status)
-{
- struct mmc_command *cmd = host->req->cmd;
-
-change_state:
- switch (host->state) {
- case IDLE:
- return;
- case CMD:
- if (host_status & (TIFM_MMCSD_EOC | TIFM_MMCSD_CERR)) {
- tifm_sd_fetch_resp(cmd, sock);
- if (cmd->data) {
- host->state = BRS;
- } else {
- host->state = READY;
- }
- goto change_state;
- }
- break;
- case BRS:
- if (tifm_sd_transfer_data(sock, host, host_status)) {
- if (cmd->data->flags & MMC_DATA_WRITE) {
- host->state = CARD;
- } else {
- if (no_dma) {
- if (host->req->stop) {
- tifm_sd_exec(host, host->req->stop);
- host->state = SCMD;
- } else {
- host->state = READY;
- }
- } else {
- host->state = FIFO;
- }
- }
- goto change_state;
- }
- break;
- case SCMD:
- if (host_status & TIFM_MMCSD_EOC) {
- tifm_sd_fetch_resp(host->req->stop, sock);
- host->state = READY;
- goto change_state;
- }
- break;
- case CARD:
- dev_dbg(&sock->dev, "waiting for CARD, have %zd blocks\n",
- host->written_blocks);
- if (!(host->flags & CARD_BUSY)
- && (host->written_blocks == cmd->data->blocks)) {
- if (no_dma) {
- if (host->req->stop) {
- tifm_sd_exec(host, host->req->stop);
- host->state = SCMD;
- } else {
- host->state = READY;
- }
- } else {
- host->state = FIFO;
- }
- goto change_state;
- }
- break;
- case FIFO:
- if (host->flags & FIFO_RDY) {
- host->flags &= ~FIFO_RDY;
- if (host->req->stop) {
- tifm_sd_exec(host, host->req->stop);
- host->state = SCMD;
- } else {
- host->state = READY;
- }
- goto change_state;
- }
- break;
- case READY:
- tasklet_schedule(&host->finish_tasklet);
- return;
- }
-
-}
-
-/* Called from interrupt handler */
-static void tifm_sd_signal_irq(struct tifm_dev *sock,
- unsigned int sock_irq_status)
-{
- struct tifm_sd *host;
- unsigned int host_status = 0, fifo_status = 0;
- int error_code = 0;
-
- spin_lock(&sock->lock);
- host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
-
- if (sock_irq_status & FIFO_EVENT) {
- fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
- writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
-
- host->flags |= fifo_status & FIFO_RDY;
- }
-
- if (sock_irq_status & CARD_EVENT) {
- host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
- writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
-
- if (!host->req)
- goto done;
-
- if (host_status & TIFM_MMCSD_ERRMASK) {
- if (host_status & (TIFM_MMCSD_CTO | TIFM_MMCSD_DTO))
- error_code = MMC_ERR_TIMEOUT;
- else if (host_status
- & (TIFM_MMCSD_CCRC | TIFM_MMCSD_DCRC))
- error_code = MMC_ERR_BADCRC;
-
- 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->state == SCMD) {
- host->req->stop->error = error_code;
- } else if (host->state == BRS
- || host->state == CARD
- || host->state == FIFO) {
- host->req->cmd->error = error_code;
- tifm_sd_exec(host, host->req->stop);
- host->state = SCMD;
- goto done;
- } else {
- host->req->cmd->error = error_code;
- }
- } else {
- host->req->cmd->error = error_code;
- }
- host->state = READY;
- }
-
- if (host_status & TIFM_MMCSD_CB)
- host->flags |= CARD_BUSY;
- if ((host_status & TIFM_MMCSD_EOFB)
- && (host->flags & CARD_BUSY)) {
- host->written_blocks++;
- host->flags &= ~CARD_BUSY;
- }
- }
-
- if (host->req)
- tifm_sd_process_cmd(sock, host, host_status);
-done:
- dev_dbg(&sock->dev, "host_status %x, fifo_status %x\n",
- host_status, fifo_status);
- spin_unlock(&sock->lock);
-}
-
-static void tifm_sd_prepare_data(struct tifm_sd *host, struct mmc_command *cmd)
-{
- struct tifm_dev *sock = host->dev;
- unsigned int dest_cnt;
-
- /* DMA style IO */
- dev_dbg(&sock->dev, "setting dma for %d blocks\n",
- cmd->data->blocks);
- writel(TIFM_FIFO_INT_SETALL,
- sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
- writel(ilog2(cmd->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);
-
- dest_cnt = (cmd->data->blocks) << 8;
-
- writel(sg_dma_address(cmd->data->sg), sock->addr + SOCK_DMA_ADDRESS);
-
- writel(cmd->data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
- writel(cmd->data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN);
-
- if (cmd->data->flags & MMC_DATA_WRITE) {
- writel(TIFM_MMCSD_TXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
- writel(dest_cnt | TIFM_DMA_TX | TIFM_DMA_EN,
- sock->addr + SOCK_DMA_CONTROL);
- } else {
- writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
- writel(dest_cnt | TIFM_DMA_EN, sock->addr + SOCK_DMA_CONTROL);
- }
-}
-
-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;
- int sg_count = 0;
- struct mmc_data *r_data = mrq->cmd->data;
-
- spin_lock_irqsave(&sock->lock, flags);
- if (host->flags & EJECT) {
- spin_unlock_irqrestore(&sock->lock, flags);
- goto err_out;
- }
-
- if (host->req) {
- printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n");
- spin_unlock_irqrestore(&sock->lock, flags);
- goto err_out;
- }
-
- if (r_data) {
- tifm_sd_set_data_timeout(host, r_data);
-
- sg_count = tifm_map_sg(sock, r_data->sg, r_data->sg_len,
- mrq->cmd->flags & MMC_DATA_WRITE
- ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
- if (sg_count != 1) {
- printk(KERN_ERR DRIVER_NAME
- ": scatterlist map failed\n");
- spin_unlock_irqrestore(&sock->lock, flags);
- goto err_out;
- }
-
- host->written_blocks = 0;
- host->flags &= ~CARD_BUSY;
- tifm_sd_prepare_data(host, mrq->cmd);
- }
-
- host->req = mrq;
- mod_timer(&host->timer, jiffies + host->timeout_jiffies);
- host->state = CMD;
- 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:
- if (sg_count > 0)
- tifm_unmap_sg(sock, r_data->sg, r_data->sg_len,
- (r_data->flags & MMC_DATA_WRITE)
- ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
-
- mrq->cmd->error = MMC_ERR_TIMEOUT;
- 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;
- host->state = IDLE;
-
- if (!mrq) {
- printk(KERN_ERR DRIVER_NAME ": no request to complete?\n");
- spin_unlock_irqrestore(&sock->lock, flags);
- return;
- }
-
- r_data = mrq->cmd->data;
- if (r_data) {
- if (r_data->flags & MMC_DATA_WRITE) {
- r_data->bytes_xfered = host->written_blocks
- * r_data->blksz;
- } else {
- 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;
- }
- tifm_unmap_sg(sock, r_data->sg, r_data->sg_len,
- (r_data->flags & MMC_DATA_WRITE)
- ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
- }
-
- 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_request_nodma(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->flags & EJECT) {
- spin_unlock_irqrestore(&sock->lock, flags);
- goto err_out;
- }
-
- if (host->req) {
- printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n");
- spin_unlock_irqrestore(&sock->lock, flags);
- goto err_out;
- }
-
- if (r_data) {
- tifm_sd_set_data_timeout(host, r_data);
-
- host->buffer_size = mrq->cmd->data->blocks
- * mrq->cmd->data->blksz;
-
- 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->written_blocks = 0;
- host->flags &= ~CARD_BUSY;
- host->buffer_pos = 0;
- 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);
- host->state = CMD;
- 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:
- mrq->cmd->error = MMC_ERR_TIMEOUT;
- mmc_request_done(mmc, mrq);
-}
-
-static void tifm_sd_end_cmd_nodma(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;
- host->state = IDLE;
-
- if (!mrq) {
- printk(KERN_ERR DRIVER_NAME ": no request to complete?\n");
- spin_unlock_irqrestore(&sock->lock, flags);
- return;
- }
-
- r_data = mrq->cmd->data;
- if (r_data) {
- writel((~TIFM_MMCSD_BUFINT) &
- readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
- sock->addr + SOCK_MMCSD_INT_ENABLE);
-
- if (r_data->flags & MMC_DATA_WRITE) {
- r_data->bytes_xfered = host->written_blocks
- * r_data->blksz;
- } else {
- 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;
- }
- host->buffer_pos = 0;
- host->buffer_size = 0;
- }
-
- 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_terminate(struct tifm_sd *host)
-{
- struct tifm_dev *sock = host->dev;
- unsigned long flags;
-
- writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
- mmiowb();
- spin_lock_irqsave(&sock->lock, flags);
- host->flags |= EJECT;
- 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);
- tasklet_schedule(&host->finish_tasklet);
- }
- spin_unlock_irqrestore(&sock->lock, flags);
-}
-
-static void tifm_sd_abort(unsigned long data)
-{
- struct tifm_sd *host = (struct tifm_sd*)data;
-
- printk(KERN_ERR DRIVER_NAME
- ": card failed to respond for a long period of time");
-
- tifm_sd_terminate(host);
- 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, "Setting bus width %d, power %d\n", ios->bus_width,
- ios->power_mode);
- 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);
-
- if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
- host->flags |= OPENDRAIN;
- else
- host->flags &= ~OPENDRAIN;
-
- /* chip_select : maybe later */
- //vdd
- //power is set before probe / after remove
- //I believe, power_off when already marked for eject is sufficient to
- // allow removal.
- if ((host->flags & EJECT) && ios->power_mode == MMC_POWER_OFF) {
- host->flags |= EJECT_DONE;
- wake_up_all(&host->notify);
- }
-
- spin_unlock_irqrestore(&sock->lock, flags);
-}
-
-static int tifm_sd_ro(struct mmc_host *mmc)
-{
- int rc;
- struct tifm_sd *host = mmc_priv(mmc);
- struct tifm_dev *sock = host->dev;
- unsigned long flags;
-
- spin_lock_irqsave(&sock->lock, flags);
-
- host->flags |= (CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE));
- rc = (host->flags & CARD_RO) ? 1 : 0;
-
- spin_unlock_irqrestore(&sock->lock, flags);
- return rc;
-}
-
-static 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 = 2; rc <= 256; rc <<= 1) {
- if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) {
- rc = 0;
- break;
- }
- msleep(rc);
- }
-
- if (rc) {
- printk(KERN_ERR DRIVER_NAME
- ": controller failed to reset\n");
- 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);
-
- /* INAB should take much less than reset */
- for (rc = 1; rc <= 16; 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) {
- printk(KERN_ERR DRIVER_NAME
- ": card not ready - probe failed on initialization\n");
- return -ENODEV;
- }
-
- writel(TIFM_MMCSD_DATAMASK | 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))) {
- printk(KERN_WARNING DRIVER_NAME ": card gone, unexpectedly\n");
- 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);
-
- init_waitqueue_head(&host->notify);
- tasklet_init(&host->finish_tasklet,
- no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd,
- (unsigned long)host);
- setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host);
-
- tifm_sd_ops.request = no_dma ? tifm_sd_request_nodma : tifm_sd_request;
- mmc->ops = &tifm_sd_ops;
- mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
- mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE;
- mmc->f_min = 20000000 / 60;
- mmc->f_max = 24000000;
- mmc->max_hw_segs = 1;
- mmc->max_phys_segs = 1;
- // limited by DMA counter - it's safer to stick with
- // block counter has 11 bits though
- mmc->max_blk_count = 256;
- // 2k maximum hw block length
- mmc->max_blk_size = 2048;
- mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
- mmc->max_seg_size = mmc->max_req_size;
- sock->signal_irq = tifm_sd_signal_irq;
- rc = tifm_sd_initialize_host(host);
-
- if (!rc)
- rc = mmc_add_host(mmc);
- if (rc)
- goto out_free_mmc;
-
- return 0;
-out_free_mmc:
- 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);
-
- del_timer_sync(&host->timer);
- tifm_sd_terminate(host);
- wait_event_timeout(host->notify, host->flags & EJECT_DONE,
- host->timeout_jiffies);
- tasklet_kill(&host->finish_tasklet);
- mmc_remove_host(mmc);
-
- /* The meaning of the bit majority in this constant is unknown. */
- writel(0xfff8 & readl(sock->addr + SOCK_CONTROL),
- sock->addr + SOCK_CONTROL);
-
- tifm_set_drvdata(sock, NULL);
- mmc_free_host(mmc);
-}
-
-#ifdef CONFIG_PM
-
-static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state)
-{
- struct mmc_host *mmc = tifm_get_drvdata(sock);
- int rc;
-
- rc = mmc_suspend_host(mmc, state);
- /* The meaning of the bit majority in this constant is unknown. */
- writel(0xfff8 & readl(sock->addr + SOCK_CONTROL),
- sock->addr + SOCK_CONTROL);
- return rc;
-}
-
-static int tifm_sd_resume(struct tifm_dev *sock)
-{
- struct mmc_host *mmc = tifm_get_drvdata(sock);
- struct tifm_sd *host = mmc_priv(mmc);
-
- if (sock->media_id != FM_SD
- || tifm_sd_initialize_host(host)) {
- tifm_eject(sock);
- return 0;
- } else {
- return mmc_resume_host(mmc);
- }
-}
-
-#else
-
-#define tifm_sd_suspend NULL
-#define tifm_sd_resume NULL
-
-#endif /* CONFIG_PM */
-
-static tifm_media_id tifm_sd_id_tbl[] = {
- FM_SD, 0
-};
-
-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);