Adds OMAP MMC driver.
Signed-off-by: Juha Yrj?l? <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
Signed-off-by: Carlos Aguiar <[email protected]>
Index: linux-2.6.16-rc3-git6/drivers/mmc/Kconfig
===================================================================
--- linux-2.6.16-rc3-git6.orig/drivers/mmc/Kconfig 2006-02-15 16:47:13.000000000 -0400
+++ linux-2.6.16-rc3-git6/drivers/mmc/Kconfig 2006-02-16 09:10:05.000000000 -0400
@@ -49,6 +49,17 @@ config MMC_PXA
If unsure, say N.
+config MMC_OMAP
+ tristate "TI OMAP Multimedia Card Interface support"
+ depends on ARCH_OMAP && MMC
+ select TPS65010 if MACH_OMAP_H2
+ help
+ This selects the TI OMAP Multimedia card Interface.
+ If you have an OMAP board with a Multimedia Card slot,
+ say Y or M here.
+
+ If unsure, say N.
+
config MMC_WBSD
tristate "Winbond W83L51xD SD/MMC Card Interface support"
depends on MMC && ISA_DMA_API
Index: linux-2.6.16-rc3-git6/drivers/mmc/Makefile
===================================================================
--- linux-2.6.16-rc3-git6.orig/drivers/mmc/Makefile 2006-01-02 23:21:10.000000000 -0400
+++ linux-2.6.16-rc3-git6/drivers/mmc/Makefile 2006-02-16 09:10:05.000000000 -0400
@@ -19,5 +19,6 @@ obj-$(CONFIG_MMC_ARMMMCI) += mmci.o
obj-$(CONFIG_MMC_PXA) += pxamci.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
+obj-$(CONFIG_MMC_OMAP) += omap.o
mmc_core-y := mmc.o mmc_queue.o mmc_sysfs.o
Index: linux-2.6.16-rc3-git6/drivers/mmc/omap.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.16-rc3-git6/drivers/mmc/omap.c 2006-02-16 09:10:05.000000000 -0400
@@ -0,0 +1,1277 @@
+/*
+ * linux/drivers/media/mmc/omap.c
+ *
+ * Copyright (C) 2004 Nokia Corporation
+ * Written by Tuukka Tikkanen and Juha Yrj��<[email protected]>
+ * Misc hacks here and there by Tony Lindgren <[email protected]>
+ * Other hacks (DMA, SD, etc) by David Brownell
+ *
+ * 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/config.h>
+
+#ifdef CONFIG_MMC_DEBUG
+#define DEBUG /* for dev_dbg(), pr_debug(), etc */
+#endif
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/protocol.h>
+#include <linux/mmc/card.h>
+#include <linux/clk.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/scatterlist.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/board.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/fpga.h>
+#include <asm/arch/tps65010.h>
+
+#include "omap.h"
+
+#define DRIVER_NAME "mmci-omap"
+#define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE))
+
+/* Specifies how often in millisecs to poll for card status changes
+ * when the cover switch is open */
+#define OMAP_MMC_SWITCH_POLL_DELAY 500
+
+static int mmc_omap_enable_poll = 1;
+
+struct mmc_omap_host {
+ int initialized;
+ int suspended;
+ struct mmc_request * mrq;
+ struct mmc_command * cmd;
+ struct mmc_data * data;
+ struct mmc_host * mmc;
+ struct device * dev;
+ unsigned char id; /* 16xx chips have 2 MMC blocks */
+ struct clk * iclk;
+ struct clk * fclk;
+ void __iomem *base;
+ int irq;
+ unsigned char bus_mode;
+ unsigned char hw_bus_mode;
+
+ unsigned int sg_len;
+ int sg_idx;
+ u16 * buffer;
+ u32 buffer_bytes_left;
+ u32 total_bytes_left;
+
+ unsigned use_dma:1;
+ unsigned brs_received:1, dma_done:1;
+ unsigned dma_is_read:1;
+ unsigned dma_in_use:1;
+ int dma_ch;
+ spinlock_t dma_lock;
+ struct timer_list dma_timer;
+ unsigned dma_len;
+
+ short power_pin;
+ short wp_pin;
+
+ int switch_pin;
+ struct work_struct switch_work;
+ struct timer_list switch_timer;
+ int switch_last_state;
+};
+
+static inline int
+mmc_omap_cover_is_open(struct mmc_omap_host *host)
+{
+ if (host->switch_pin < 0)
+ return 0;
+ return omap_get_gpio_datain(host->switch_pin);
+}
+
+static ssize_t
+mmc_omap_show_cover_switch(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mmc_omap_host *host = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", mmc_omap_cover_is_open(host) ? "open" :
+ "closed");
+}
+
+static DEVICE_ATTR(cover_switch, S_IRUGO, mmc_omap_show_cover_switch, NULL);
+
+static ssize_t
+mmc_omap_show_enable_poll(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", mmc_omap_enable_poll);
+}
+
+static ssize_t
+mmc_omap_store_enable_poll(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ int enable_poll;
+
+ if (sscanf(buf, "%10d", &enable_poll) != 1)
+ return -EINVAL;
+
+ if (enable_poll != mmc_omap_enable_poll) {
+ struct mmc_omap_host *host = dev_get_drvdata(dev);
+
+ mmc_omap_enable_poll = enable_poll;
+ if (enable_poll && host->switch_pin >= 0)
+ schedule_work(&host->switch_work);
+ }
+ return size;
+}
+
+static DEVICE_ATTR(enable_poll, 0664,
+ mmc_omap_show_enable_poll, mmc_omap_store_enable_poll);
+
+static void
+mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
+{
+ u32 cmdreg;
+ u32 resptype;
+ u32 cmdtype;
+
+ host->cmd = cmd;
+
+ resptype = 0;
+ cmdtype = 0;
+
+ /* Our hardware needs to know exact type */
+ switch (RSP_TYPE(mmc_resp_type(cmd))) {
+ case RSP_TYPE(MMC_RSP_R1):
+ /* resp 1, resp 1b */
+ resptype = 1;
+ break;
+ case RSP_TYPE(MMC_RSP_R2):
+ resptype = 2;
+ break;
+ case RSP_TYPE(MMC_RSP_R3):
+ resptype = 3;
+ break;
+ default:
+ break;
+ }
+
+ /* Any data transfer means adtc type (but that information is not
+ * in command structure, so we flagged it into host struct.)
+ * However, telling bc, bcr and ac apart based on response is
+ * not foolproof:
+ * CMD0 = bc = resp0 CMD15 = ac = resp0
+ * CMD2 = bcr = resp2 CMD10 = ac = resp2
+ *
+ * Resolve to best guess with some exception testing:
+ * resp0 -> bc, except CMD15 = ac
+ * rest are ac, except if opendrain
+ */
+ if (host->data) {
+ cmdtype = OMAP_MMC_CMDTYPE_ADTC;
+ } else if (resptype == 0 && cmd->opcode != 15) {
+ cmdtype = OMAP_MMC_CMDTYPE_BC;
+ } else if (host->bus_mode == MMC_BUSMODE_OPENDRAIN) {
+ cmdtype = OMAP_MMC_CMDTYPE_BCR;
+ } else {
+ cmdtype = OMAP_MMC_CMDTYPE_AC;
+ }
+
+ cmdreg = cmd->opcode | (resptype << 8) | (cmdtype << 12);
+
+ if (host->bus_mode == MMC_BUSMODE_OPENDRAIN)
+ cmdreg |= 1 << 6;
+
+ if (cmd->flags & MMC_RSP_BUSY)
+ cmdreg |= 1 << 11;
+
+ if (host->data && !(host->data->flags & MMC_DATA_WRITE))
+ cmdreg |= 1 << 15;
+
+ clk_enable(host->fclk);
+
+ OMAP_MMC_WRITE(host->base, CTO, 200);
+ OMAP_MMC_WRITE(host->base, ARGL, cmd->arg & 0xffff);
+ OMAP_MMC_WRITE(host->base, ARGH, cmd->arg >> 16);
+ OMAP_MMC_WRITE(host->base, IE,
+ OMAP_MMC_STAT_A_EMPTY | OMAP_MMC_STAT_A_FULL |
+ OMAP_MMC_STAT_CMD_CRC | OMAP_MMC_STAT_CMD_TOUT |
+ OMAP_MMC_STAT_DATA_CRC | OMAP_MMC_STAT_DATA_TOUT |
+ OMAP_MMC_STAT_END_OF_CMD | OMAP_MMC_STAT_CARD_ERR |
+ OMAP_MMC_STAT_END_OF_DATA);
+ OMAP_MMC_WRITE(host->base, CMD, cmdreg);
+}
+
+static void
+mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ if (host->dma_in_use) {
+ enum dma_data_direction dma_data_dir;
+
+ BUG_ON(host->dma_ch < 0);
+ if (data->error != MMC_ERR_NONE)
+ omap_stop_dma(host->dma_ch);
+ /* Release DMA channel lazily */
+ mod_timer(&host->dma_timer, jiffies + HZ);
+ if (data->flags & MMC_DATA_WRITE)
+ dma_data_dir = DMA_TO_DEVICE;
+ else
+ dma_data_dir = DMA_FROM_DEVICE;
+ dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
+ dma_data_dir);
+ }
+ host->data = NULL;
+ host->sg_len = 0;
+ clk_disable(host->fclk);
+
+ /* NOTE: MMC layer will sometimes poll-wait CMD13 next, issuing
+ * dozens of requests until the card finishes writing data.
+ * It'd be cheaper to just wait till an EOFB interrupt arrives...
+ */
+
+ if (!data->stop) {
+ host->mrq = NULL;
+ mmc_request_done(host->mmc, data->mrq);
+ return;
+ }
+
+ mmc_omap_start_command(host, data->stop);
+}
+
+static void
+mmc_omap_end_of_data(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ unsigned long flags;
+ int done;
+
+ if (!host->dma_in_use) {
+ mmc_omap_xfer_done(host, data);
+ return;
+ }
+ done = 0;
+ spin_lock_irqsave(&host->dma_lock, flags);
+ if (host->dma_done)
+ done = 1;
+ else
+ host->brs_received = 1;
+ spin_unlock_irqrestore(&host->dma_lock, flags);
+ if (done)
+ mmc_omap_xfer_done(host, data);
+}
+
+static void
+mmc_omap_dma_timer(unsigned long data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+
+ BUG_ON(host->dma_ch < 0);
+ omap_free_dma(host->dma_ch);
+ host->dma_ch = -1;
+}
+
+static void
+mmc_omap_dma_done(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ unsigned long flags;
+ int done;
+
+ done = 0;
+ spin_lock_irqsave(&host->dma_lock, flags);
+ if (host->brs_received)
+ done = 1;
+ else
+ host->dma_done = 1;
+ spin_unlock_irqrestore(&host->dma_lock, flags);
+ if (done)
+ mmc_omap_xfer_done(host, data);
+}
+
+static void
+mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
+{
+ host->cmd = NULL;
+
+ switch (RSP_TYPE(mmc_resp_type(cmd))) {
+ case RSP_TYPE(MMC_RSP_R1):
+ case RSP_TYPE(MMC_RSP_R3):
+ /* response types 1, 1b, 3, 4, 5, 6 */
+ cmd->resp[0] =
+ OMAP_MMC_READ(host->base, RSP6) |
+ (OMAP_MMC_READ(host->base, RSP7) << 16);
+ break;
+ case RSP_TYPE(MMC_RSP_R2):
+ cmd->resp[3] =
+ OMAP_MMC_READ(host->base, RSP0) |
+ (OMAP_MMC_READ(host->base, RSP1) << 16);
+ cmd->resp[2] =
+ OMAP_MMC_READ(host->base, RSP2) |
+ (OMAP_MMC_READ(host->base, RSP3) << 16);
+ cmd->resp[1] =
+ OMAP_MMC_READ(host->base, RSP4) |
+ (OMAP_MMC_READ(host->base, RSP5) << 16);
+ cmd->resp[0] =
+ OMAP_MMC_READ(host->base, RSP6) |
+ (OMAP_MMC_READ(host->base, RSP7) << 16);
+ break;
+ default:
+ break;
+ }
+
+ if (host->data == NULL || cmd->error != MMC_ERR_NONE) {
+ host->mrq = NULL;
+ clk_disable(host->fclk);
+ mmc_request_done(host->mmc, cmd->mrq);
+ }
+}
+
+/* PIO only */
+static void
+mmc_omap_sg_to_buf(struct mmc_omap_host *host)
+{
+ struct scatterlist *sg;
+
+ sg = host->data->sg + host->sg_idx;
+ host->buffer_bytes_left = sg->length;
+ host->buffer = page_address(sg->page) + sg->offset;
+ if (host->buffer_bytes_left > host->total_bytes_left)
+ host->buffer_bytes_left = host->total_bytes_left;
+}
+
+/* PIO only */
+static void
+mmc_omap_xfer_data(struct mmc_omap_host *host, int write)
+{
+ int n;
+ void __iomem *reg;
+ u16 *p;
+
+ if (host->buffer_bytes_left == 0) {
+ host->sg_idx++;
+ BUG_ON(host->sg_idx == host->sg_len);
+ mmc_omap_sg_to_buf(host);
+ }
+ n = 64;
+ if (n > host->buffer_bytes_left)
+ n = host->buffer_bytes_left;
+ host->buffer_bytes_left -= n;
+ host->total_bytes_left -= n;
+ host->data->bytes_xfered += n;
+
+ /* Optimize the loop a bit by calculating the register only
+ * once */
+ reg = host->base + OMAP_MMC_REG_DATA;
+ p = host->buffer;
+ n /= 2;
+ if (write) {
+ while (n--)
+ __raw_writew(*p++, reg);
+ } else {
+ while (n-- > 0)
+ *p++ = __raw_readw(reg);
+ }
+ host->buffer = p;
+}
+
+static inline void mmc_omap_report_irq(u16 status)
+{
+ static const char *mmc_omap_status_bits[] = {
+ "EOC", "CD", "CB", "BRS", "EOFB", "DTO", "DCRC", "CTO",
+ "CCRC", "CRW", "AF", "AE", "OCRB", "CIRQ", "CERR"
+ };
+ int i, c = 0;
+
+ for (i = 0; i < ARRAY_SIZE(mmc_omap_status_bits); i++)
+ if (status & (1 << i)) {
+ if (c)
+ printk(" ");
+ printk("%s", mmc_omap_status_bits[i]);
+ c++;
+ }
+}
+
+static irqreturn_t mmc_omap_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct mmc_omap_host * host = (struct mmc_omap_host *)dev_id;
+ u16 status;
+ int end_command;
+ int end_transfer;
+ int transfer_error;
+
+ if (host->cmd == NULL && host->data == NULL) {
+ status = OMAP_MMC_READ(host->base, STAT);
+ printk(KERN_INFO "MMC%d: Spurious interrupt 0x%04x\n",
+ host->id, status);
+ if (status != 0) {
+ OMAP_MMC_WRITE(host->base, STAT, status);
+ OMAP_MMC_WRITE(host->base, IE, 0);
+ }
+ return IRQ_HANDLED;
+ }
+
+ end_command = 0;
+ end_transfer = 0;
+ transfer_error = 0;
+
+ while ((status = OMAP_MMC_READ(host->base, STAT)) != 0) {
+ OMAP_MMC_WRITE(host->base, STAT, status);
+#ifdef CONFIG_MMC_DEBUG
+ printk(KERN_DEBUG "MMC IRQ %04x (CMD %d): ", status,
+ host->cmd != NULL ? host->cmd->opcode : -1);
+ mmc_omap_report_irq(status);
+ printk("\n");
+#endif
+ if (host->total_bytes_left) {
+ if ((status & OMAP_MMC_STAT_A_FULL) ||
+ (status & OMAP_MMC_STAT_END_OF_DATA))
+ mmc_omap_xfer_data(host, 0);
+ if (status & OMAP_MMC_STAT_A_EMPTY)
+ mmc_omap_xfer_data(host, 1);
+ }
+
+ if (status & OMAP_MMC_STAT_END_OF_DATA) {
+ end_transfer = 1;
+ }
+
+ if (status & OMAP_MMC_STAT_DATA_TOUT) {
+ dev_dbg(mmc_dev(host->mmc), "MMC%d: Data timeout\n",
+ host->id);
+ if (host->data) {
+ host->data->error |= MMC_ERR_TIMEOUT;
+ transfer_error = 1;
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_DATA_CRC) {
+ if (host->data) {
+ host->data->error |= MMC_ERR_BADCRC;
+ dev_dbg(mmc_dev(host->mmc), "MMC%d: Data CRC
+ error, bytes left %d\n",
+ host->id,
+ host->total_bytes_left);
+ transfer_error = 1;
+ } else {
+ dev_dbg(mmc_dev(host->mmc), "MMC%d: Data CRC
+ error\n", host->id);
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_CMD_TOUT) {
+ /* Timeouts are routine with some commands */
+ if (host->cmd) {
+ if (host->cmd->opcode != MMC_ALL_SEND_CID &&
+ host->cmd->opcode !=
+ MMC_SEND_OP_COND &&
+ host->cmd->opcode !=
+ MMC_APP_CMD &&
+ !mmc_omap_cover_is_open(host))
+ dev_err(mmc_dev(host->mmc), "MMC%d:
+ Command timeout,
+ CMD%d\n", host->id,
+ host->cmd->opcode);
+ host->cmd->error = MMC_ERR_TIMEOUT;
+ end_command = 1;
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_CMD_CRC) {
+ if (host->cmd) {
+ dev_err(mmc_dev(host->mmc), "MMC%d: Command CRC
+ error (CMD%d, arg 0x%08x)\n",
+ host->id, host->cmd->opcode,
+ host->cmd->arg);
+ host->cmd->error = MMC_ERR_BADCRC;
+ end_command = 1;
+ } else
+ dev_err(mmc_dev(host->mmc), "MMC%d: Command CRC
+ error without cmd?\n",
+ host->id);
+ }
+
+ if (status & OMAP_MMC_STAT_CARD_ERR) {
+ if (host->cmd && host->cmd->opcode == MMC_STOP_TRANSMISSION) {
+ u32 response = OMAP_MMC_READ(host->base, RSP6)
+ | (OMAP_MMC_READ(host->base, RSP7) << 16);
+ /* STOP sometimes sets must-ignore bits */
+ if (!(response & (R1_CC_ERROR
+ | R1_ILLEGAL_COMMAND
+ | R1_COM_CRC_ERROR))) {
+ end_command = 1;
+ continue;
+ }
+ }
+
+ dev_dbg(mmc_dev(host->mmc), "MMC%d: Card status error (CMD%d)\n",
+ host->id, host->cmd->opcode);
+ if (host->cmd) {
+ host->cmd->error = MMC_ERR_FAILED;
+ end_command = 1;
+ }
+ if (host->data) {
+ host->data->error = MMC_ERR_FAILED;
+ transfer_error = 1;
+ }
+ }
+
+ /*
+ * NOTE: On 1610 the END_OF_CMD may come too early when
+ * starting a write
+ */
+ if ((status & OMAP_MMC_STAT_END_OF_CMD) &&
+ (!(status & OMAP_MMC_STAT_A_EMPTY))) {
+ end_command = 1;
+ }
+ }
+
+ if (end_command) {
+ mmc_omap_cmd_done(host, host->cmd);
+ }
+ if (transfer_error)
+ mmc_omap_xfer_done(host, host->data);
+ else if (end_transfer)
+ mmc_omap_end_of_data(host, host->data);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mmc_omap_switch_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) dev_id;
+
+ schedule_work(&host->switch_work);
+
+ return IRQ_HANDLED;
+}
+
+static void mmc_omap_switch_timer(unsigned long arg)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) arg;
+
+ schedule_work(&host->switch_work);
+}
+
+/* FIXME: Handle card insertion and removal properly. Maybe use a mask
+ * for MMC state? */
+static void mmc_omap_switch_callback(unsigned long data, u8 mmc_mask)
+{
+}
+
+static void mmc_omap_switch_handler(void *data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+ struct mmc_card *card;
+ static int complained = 0;
+ int cards = 0, cover_open;
+
+ if (host->switch_pin == -1)
+ return;
+ cover_open = mmc_omap_cover_is_open(host);
+ if (cover_open != host->switch_last_state) {
+ kobject_uevent(&host->dev->kobj, KOBJ_CHANGE);
+ host->switch_last_state = cover_open;
+ }
+ mmc_detect_change(host->mmc, 0);
+ list_for_each_entry(card, &host->mmc->cards, node) {
+ if (mmc_card_present(card))
+ cards++;
+ }
+ if (mmc_omap_cover_is_open(host)) {
+ if (!complained) {
+ printk(KERN_INFO "MMC%d: cover is open\n", host->id);
+ complained = 1;
+ }
+ if (mmc_omap_enable_poll)
+ mod_timer(&host->switch_timer, jiffies +
+ msecs_to_jiffies(OMAP_MMC_SWITCH_POLL_DELAY));
+ } else {
+ complained = 0;
+ }
+}
+
+/* Prepare to transfer the next segment of a scatterlist */
+static void
+mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ int dma_ch = host->dma_ch;
+ unsigned long data_addr;
+ u16 buf, frame;
+ u32 count;
+ struct scatterlist *sg = &data->sg[host->sg_idx];
+ int src_port = 0;
+ int dst_port = 0;
+ int sync_dev = 0;
+
+ data_addr = io_v2p((u32) host->base) + OMAP_MMC_REG_DATA;
+ frame = 1 << data->blksz_bits;
+ count = sg_dma_len(sg);
+
+ if ((data->blocks == 1) && (count > (1 << data->blksz_bits)))
+ count = frame;
+
+ host->dma_len = count;
+
+ /* FIFO is 16x2 bytes on 15xx, and 32x2 bytes on 16xx and 24xx.
+ * Use 16 or 32 word frames when the blocksize is at least that large.
+ * Blocksize is usually 512 bytes; but not for some SD reads.
+ */
+ if (cpu_is_omap15xx() && frame > 32)
+ frame = 32;
+ else if (frame > 64)
+ frame = 64;
+ count /= frame;
+ frame >>= 1;
+
+ if (!(data->flags & MMC_DATA_WRITE)) {
+ buf = 0x800f | ((frame - 1) << 8);
+
+ if (cpu_class_is_omap1()) {
+ src_port = OMAP_DMA_PORT_TIPB;
+ dst_port = OMAP_DMA_PORT_EMIFF;
+ }
+ if (cpu_is_omap24xx())
+ sync_dev = OMAP24XX_DMA_MMC1_RX;
+
+ omap_set_dma_src_params(dma_ch, src_port,
+ OMAP_DMA_AMODE_CONSTANT,
+ data_addr, 0, 0);
+ omap_set_dma_dest_params(dma_ch, dst_port,
+ OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sg), 0, 0);
+ omap_set_dma_dest_data_pack(dma_ch, 1);
+ omap_set_dma_dest_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
+ } else {
+ buf = 0x0f80 | ((frame - 1) << 0);
+
+ if (cpu_class_is_omap1()) {
+ src_port = OMAP_DMA_PORT_EMIFF;
+ dst_port = OMAP_DMA_PORT_TIPB;
+ }
+ if (cpu_is_omap24xx())
+ sync_dev = OMAP24XX_DMA_MMC1_TX;
+
+ omap_set_dma_dest_params(dma_ch, dst_port,
+ OMAP_DMA_AMODE_CONSTANT,
+ data_addr, 0, 0);
+ omap_set_dma_src_params(dma_ch, src_port,
+ OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sg), 0, 0);
+ omap_set_dma_src_data_pack(dma_ch, 1);
+ omap_set_dma_src_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
+ }
+
+ /* Max limit for DMA frame count is 0xffff */
+ if (unlikely(count > 0xffff))
+ BUG();
+
+ OMAP_MMC_WRITE(host->base, BUF, buf);
+ omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S16,
+ frame, count, OMAP_DMA_SYNC_FRAME,
+ sync_dev, 0);
+}
+
+/* A scatterlist segment completed */
+static void mmc_omap_dma_cb(int lch, u16 ch_status, void *data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+ struct mmc_data *mmcdat = host->data;
+
+ if (unlikely(host->dma_ch < 0)) {
+ dev_err(mmc_dev(host->mmc), "MMC%d: DMA callback while DMA not
+ enabled\n", host->id);
+ return;
+ }
+ /* FIXME: We really should do something to _handle_ the errors */
+ if (ch_status & OMAP_DMA_TOUT_IRQ) {
+ dev_err(mmc_dev(host->mmc),"MMC%d: DMA timeout\n", host->id);
+ return;
+ }
+ if (ch_status & OMAP_DMA_DROP_IRQ) {
+ dev_err(mmc_dev(host->mmc), "MMC%d: DMA sync error\n",
+ host->id);
+ return;
+ }
+ if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
+ return;
+ }
+ mmcdat->bytes_xfered += host->dma_len;
+ host->sg_idx++;
+ if (host->sg_idx < host->sg_len) {
+ mmc_omap_prepare_dma(host, host->data);
+ omap_start_dma(host->dma_ch);
+ } else
+ mmc_omap_dma_done(host, host->data);
+}
+
+static int mmc_omap_get_dma_channel(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ const char *dev_name;
+ int sync_dev, dma_ch, is_read, r;
+
+ is_read = !(data->flags & MMC_DATA_WRITE);
+ del_timer_sync(&host->dma_timer);
+ if (host->dma_ch >= 0) {
+ if (is_read == host->dma_is_read)
+ return 0;
+ omap_free_dma(host->dma_ch);
+ host->dma_ch = -1;
+ }
+
+ if (is_read) {
+ if (host->id == 1) {
+ sync_dev = OMAP_DMA_MMC_RX;
+ dev_name = "MMC1 read";
+ } else {
+ sync_dev = OMAP_DMA_MMC2_RX;
+ dev_name = "MMC2 read";
+ }
+ } else {
+ if (host->id == 1) {
+ sync_dev = OMAP_DMA_MMC_TX;
+ dev_name = "MMC1 write";
+ } else {
+ sync_dev = OMAP_DMA_MMC2_TX;
+ dev_name = "MMC2 write";
+ }
+ }
+ r = omap_request_dma(sync_dev, dev_name, mmc_omap_dma_cb,
+ host, &dma_ch);
+ if (r != 0) {
+ printk("MMC%d: omap_request_dma() failed with %d\n",
+ host->id, r);
+ return r;
+ }
+ host->dma_ch = dma_ch;
+ host->dma_is_read = is_read;
+
+ return 0;
+}
+
+static inline void set_cmd_timeout(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ u16 reg;
+
+ reg = OMAP_MMC_READ(host->base, SDIO);
+ reg &= ~(1 << 5);
+ OMAP_MMC_WRITE(host->base, SDIO, reg);
+ /* Set maximum timeout */
+ OMAP_MMC_WRITE(host->base, CTO, 0xff);
+}
+
+static inline void set_data_timeout(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ int timeout;
+ u16 reg;
+
+ /* Convert ns to clock cycles by assuming 20MHz frequency
+ * 1 cycle at 20MHz = 500 ns
+ */
+ timeout = req->data->timeout_clks + req->data->timeout_ns / 500;
+
+ /* Some cards require more time to do at least the first read operation */
+ timeout = timeout << 4;
+
+ /* Check if we need to use timeout multiplier register */
+ reg = OMAP_MMC_READ(host->base, SDIO);
+ if (timeout > 0xffff) {
+ reg |= (1 << 5);
+ timeout /= 1024;
+ } else
+ reg &= ~(1 << 5);
+ OMAP_MMC_WRITE(host->base, SDIO, reg);
+ OMAP_MMC_WRITE(host->base, DTO, timeout);
+}
+
+static void
+mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ struct mmc_data *data = req->data;
+ int i, use_dma, block_size;
+ unsigned sg_len;
+
+ host->data = data;
+ if (data == NULL) {
+ OMAP_MMC_WRITE(host->base, BLEN, 0);
+ OMAP_MMC_WRITE(host->base, NBLK, 0);
+ OMAP_MMC_WRITE(host->base, BUF, 0);
+ host->dma_in_use = 0;
+ set_cmd_timeout(host, req);
+ return;
+ }
+
+
+ block_size = 1 << data->blksz_bits;
+
+ OMAP_MMC_WRITE(host->base, NBLK, data->blocks - 1);
+ OMAP_MMC_WRITE(host->base, BLEN, block_size - 1);
+ set_data_timeout(host, req);
+
+ /* cope with calling layer confusion; it issues "single
+ * block" writes using multi-block scatterlists.
+ */
+ sg_len = (data->blocks == 1) ? 1 : data->sg_len;
+
+ /* Only do DMA for entire blocks */
+ use_dma = host->use_dma;
+ if (use_dma) {
+ for (i = 0; i < sg_len; i++) {
+ if ((data->sg[i].length % block_size) != 0) {
+ use_dma = 0;
+ break;
+ }
+ }
+ }
+
+ host->sg_idx = 0;
+ if (use_dma) {
+ if (mmc_omap_get_dma_channel(host, data) == 0) {
+ enum dma_data_direction dma_data_dir;
+
+ if (data->flags & MMC_DATA_WRITE)
+ dma_data_dir = DMA_TO_DEVICE;
+ else
+ dma_data_dir = DMA_FROM_DEVICE;
+
+ host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
+ sg_len, dma_data_dir);
+ host->total_bytes_left = 0;
+ mmc_omap_prepare_dma(host, req->data);
+ host->brs_received = 0;
+ host->dma_done = 0;
+ host->dma_in_use = 1;
+ } else
+ use_dma = 0;
+ }
+
+ /* Revert to PIO? */
+ if (!use_dma) {
+ OMAP_MMC_WRITE(host->base, BUF, 0x1f1f);
+ host->total_bytes_left = data->blocks * block_size;
+ host->sg_len = sg_len;
+ mmc_omap_sg_to_buf(host);
+ host->dma_in_use = 0;
+ }
+}
+
+static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ WARN_ON(host->mrq != NULL);
+
+ host->mrq = req;
+
+ /* only touch fifo AFTER the controller readies it */
+ mmc_omap_prepare_data(host, req);
+ mmc_omap_start_command(host, req->cmd);
+ if (host->dma_in_use)
+ omap_start_dma(host->dma_ch);
+}
+
+static void innovator_fpga_socket_power(int on)
+{
+#if defined(CONFIG_MACH_OMAP_INNOVATOR) && defined(CONFIG_ARCH_OMAP15XX)
+
+ if (on) {
+ fpga_write(fpga_read(OMAP1510_FPGA_POWER) | (1 << 3),
+ OMAP1510_FPGA_POWER);
+ } else {
+ fpga_write(fpga_read(OMAP1510_FPGA_POWER) & ~(1 << 3),
+ OMAP1510_FPGA_POWER);
+ }
+#endif
+}
+
+/*
+ * Turn the socket power on/off. Innovator uses FPGA, most boards
+ * probably use GPIO.
+ */
+static void mmc_omap_power(struct mmc_omap_host *host, int on)
+{
+#ifdef CONFIG_I2C
+ if (on) {
+ if (machine_is_omap_innovator())
+ innovator_fpga_socket_power(1);
+ else if (machine_is_omap_h2())
+ tps65010_set_gpio_out_value(GPIO3, HIGH);
+ else if (machine_is_omap_h3())
+ /* GPIO 4 of TPS65010 sends SD_EN signal */
+ tps65010_set_gpio_out_value(GPIO4, HIGH);
+ else if (cpu_is_omap24xx()) {
+ u16 reg = OMAP_MMC_READ(host->base, CON);
+ OMAP_MMC_WRITE(host->base, CON, reg | (1 << 11));
+ } else
+ if (host->power_pin >= 0)
+ omap_set_gpio_dataout(host->power_pin, 1);
+ } else {
+ if (machine_is_omap_innovator())
+ innovator_fpga_socket_power(0);
+ else if (machine_is_omap_h2())
+ tps65010_set_gpio_out_value(GPIO3, LOW);
+ else if (machine_is_omap_h3())
+ tps65010_set_gpio_out_value(GPIO4, LOW);
+ else if (cpu_is_omap24xx()) {
+ u16 reg = OMAP_MMC_READ(host->base, CON);
+ OMAP_MMC_WRITE(host->base, CON, reg & ~(1 << 11));
+ } else
+ if (host->power_pin >= 0)
+ omap_set_gpio_dataout(host->power_pin, 0);
+ }
+#endif
+}
+
+static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+ int dsor;
+ int realclock, i;
+
+ realclock = ios->clock;
+
+ if (ios->clock == 0)
+ dsor = 0;
+ else {
+ int func_clk_rate = clk_get_rate(host->fclk);
+
+ dsor = func_clk_rate / realclock;
+ if (dsor < 1)
+ dsor = 1;
+
+ if (func_clk_rate / dsor > realclock)
+ dsor++;
+
+ if (dsor > 250)
+ dsor = 250;
+ dsor++;
+
+ if (ios->bus_width == MMC_BUS_WIDTH_4)
+ dsor |= 1 << 15;
+ }
+
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF:
+#ifdef CONFIG_I2C
+ mmc_omap_power(host, 0);
+#endif
+ break;
+ case MMC_POWER_UP:
+ case MMC_POWER_ON:
+#ifdef CONFIG_I2C
+ mmc_omap_power(host, 1);
+#endif
+ dsor |= 1<<11;
+ break;
+ }
+
+ host->bus_mode = ios->bus_mode;
+ host->hw_bus_mode = host->bus_mode;
+
+ clk_enable(host->fclk);
+
+ /* On insanely high arm_per frequencies something sometimes
+ * goes somehow out of sync, and the POW bit is not being set,
+ * which results in the while loop below getting stuck.
+ * Writing to the CON register twice seems to do the trick. */
+ for (i = 0; i < 2; i++)
+ OMAP_MMC_WRITE(host->base, CON, dsor);
+ if (ios->power_mode == MMC_POWER_UP) {
+ /* Send clock cycles, poll completion */
+ OMAP_MMC_WRITE(host->base, IE, 0);
+ OMAP_MMC_WRITE(host->base, STAT, 0xffff);
+ OMAP_MMC_WRITE(host->base, CMD, 1<<7);
+ while (0 == (OMAP_MMC_READ(host->base, STAT) & 1));
+ OMAP_MMC_WRITE(host->base, STAT, 1);
+ }
+ clk_disable(host->fclk);
+}
+
+static int mmc_omap_get_ro(struct mmc_host *mmc)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ return host->wp_pin && omap_get_gpio_datain(host->wp_pin);
+}
+
+static struct mmc_host_ops mmc_omap_ops = {
+ .request = mmc_omap_request,
+ .set_ios = mmc_omap_set_ios,
+ .get_ro = mmc_omap_get_ro,
+};
+
+static int __init mmc_omap_probe(struct platform_device *pdev)
+{
+ struct omap_mmc_conf *minfo = pdev->dev.platform_data;
+ struct mmc_host *mmc;
+ struct mmc_omap_host *host = NULL;
+ int ret = 0;
+
+ if (pdev->resource[0].flags != IORESOURCE_MEM
+ || pdev->resource[1].flags != IORESOURCE_IRQ) {
+ dev_err(&pdev->dev, "mmc_omap_probe: invalid resource type\n");
+ return -ENODEV;
+ }
+
+ if (!request_mem_region(pdev->resource[0].start,
+ pdev->resource[0].end - pdev->resource[0].start + 1,
+ pdev->name)) {
+ dev_dbg(&pdev->dev, "request_mem_region failed\n");
+ return -EBUSY;
+ }
+
+ mmc = mmc_alloc_host(sizeof(struct mmc_omap_host), &pdev->dev);
+ if (!mmc) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ host = mmc_priv(mmc);
+ host->mmc = mmc;
+
+ spin_lock_init(&host->dma_lock);
+ init_timer(&host->dma_timer);
+ host->dma_timer.function = mmc_omap_dma_timer;
+ host->dma_timer.data = (unsigned long) host;
+
+ host->id = pdev->id;
+
+ if (cpu_is_omap24xx()) {
+ host->iclk = clk_get(&pdev->dev, "mmc_ick");
+ if (IS_ERR(host->iclk))
+ goto out;
+ clk_enable(host->iclk);
+ }
+
+ if (!cpu_is_omap24xx())
+ host->fclk = clk_get(&pdev->dev, "mmc_ck");
+ else
+ host->fclk = clk_get(&pdev->dev, "mmc_fck");
+
+ if (IS_ERR(host->fclk)) {
+ ret = PTR_ERR(host->fclk);
+ goto out;
+ }
+
+ /* REVISIT:
+ * Also, use minfo->cover to decide how to manage
+ * the card detect sensing.
+ */
+ host->power_pin = minfo->power_pin;
+ host->switch_pin = minfo->switch_pin;
+ host->wp_pin = minfo->wp_pin;
+ host->use_dma = 1;
+ host->dma_ch = -1;
+
+ host->irq = pdev->resource[1].start;
+ host->base = (void __iomem *)pdev->resource[0].start;
+
+ if (minfo->wire4)
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
+
+ mmc->ops = &mmc_omap_ops;
+ mmc->f_min = 400000;
+ mmc->f_max = 24000000;
+ mmc->ocr_avail = MMC_VDD_33_34;
+
+ /* Use scatterlist DMA to reduce per-transfer costs.
+ * NOTE max_seg_size assumption that small blocks aren't
+ * normally used (except e.g. for reading SD registers).
+ */
+ mmc->max_phys_segs = 32;
+ mmc->max_hw_segs = 32;
+ mmc->max_sectors = 256; /* NBLK max 11-bits, OMAP also limited by DMA */
+ mmc->max_seg_size = mmc->max_sectors * 512;
+
+ if (host->power_pin >= 0) {
+ if ((ret = omap_request_gpio(host->power_pin)) != 0) {
+ dev_err(mmc_dev(host->mmc), "MMC%d: Unable to get GPIO
+ pin for MMC power\n", host->id);
+ goto out;
+ }
+ omap_set_gpio_direction(host->power_pin, 0);
+ }
+
+ ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
+ if (ret)
+ goto out;
+
+ host->dev = &pdev->dev;
+ platform_set_drvdata(pdev, host);
+
+ mmc_add_host(mmc);
+
+ if (host->switch_pin >= 0) {
+ INIT_WORK(&host->switch_work, mmc_omap_switch_handler, host);
+ init_timer(&host->switch_timer);
+ host->switch_timer.function = mmc_omap_switch_timer;
+ host->switch_timer.data = (unsigned long) host;
+ if (omap_request_gpio(host->switch_pin) != 0) {
+ printk(KERN_WARNING "MMC%d: Unable to get GPIO pin for MMC cover switch\n",
+ host->id);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+
+ omap_set_gpio_direction(host->switch_pin, 1);
+ set_irq_type(OMAP_GPIO_IRQ(host->switch_pin), IRQT_RISING);
+ ret = request_irq(OMAP_GPIO_IRQ(host->switch_pin),
+ mmc_omap_switch_irq, 0, DRIVER_NAME, host);
+ if (ret) {
+ printk(KERN_WARNING "MMC%d: Unable to get IRQ for MMC cover switch\n",
+ host->id);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+ ret = device_create_file(&pdev->dev, &dev_attr_cover_switch);
+ if (ret == 0) {
+ ret = device_create_file(&pdev->dev, &dev_attr_enable_poll);
+ if (ret != 0)
+ device_remove_file(&pdev->dev, &dev_attr_cover_switch);
+ }
+ if (ret) {
+ printk(KERN_WARNING "MMC%d: Unable to create sysfs attributes\n",
+ host->id);
+ free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+ if (mmc_omap_enable_poll && mmc_omap_cover_is_open(host))
+ schedule_work(&host->switch_work);
+ }
+
+no_switch:
+ return 0;
+
+out:
+ /* FIXME: Free other resources too. */
+ if (host) {
+ if (host->iclk && !IS_ERR(host->iclk))
+ clk_put(host->iclk);
+ if (host->fclk && !IS_ERR(host->fclk))
+ clk_put(host->fclk);
+ mmc_free_host(host->mmc);
+ }
+ return ret;
+}
+
+static int mmc_omap_remove(struct platform_device *pdev)
+{
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (host) {
+ mmc_remove_host(host->mmc);
+ free_irq(host->irq, host);
+#ifdef CONFIG_I2C
+ mmc_omap_power(host, 0);
+#endif
+
+ if (host->power_pin >= 0)
+ omap_free_gpio(host->power_pin);
+ if (host->switch_pin >= 0) {
+ device_remove_file(&pdev->dev, &dev_attr_enable_poll);
+ device_remove_file(&pdev->dev, &dev_attr_cover_switch);
+ free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ del_timer_sync(&host->switch_timer);
+ flush_scheduled_work();
+ }
+ if (host->iclk && !IS_ERR(host->iclk))
+ clk_put(host->iclk);
+ if (host->fclk && !IS_ERR(host->fclk))
+ clk_put(host->fclk);
+ mmc_free_host(host->mmc);
+ }
+
+ release_mem_region(pdev->resource[0].start,
+ pdev->resource[0].end - pdev->resource[0].start + 1);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int mmc_omap_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ int ret = 0;
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ if (host && host->suspended)
+ return 0;
+
+ if (!irqs_disabled())
+ return -EAGAIN;
+
+ if (host) {
+ ret = mmc_suspend_host(host->mmc, mesg);
+ if (ret == 0)
+ host->suspended = 1;
+ }
+ return ret;
+}
+
+static int mmc_omap_resume(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ if (host && !host->suspended)
+ return 0;
+
+ if (host) {
+ ret = mmc_resume_host(host->mmc);
+ if (ret == 0)
+ host->suspended = 0;
+ }
+
+ return ret;
+}
+#else
+#define mmc_omap_suspend NULL
+#define mmc_omap_resume NULL
+#endif
+
+static struct platform_driver mmc_omap_driver = {
+ .probe = mmc_omap_probe,
+ .remove = mmc_omap_remove,
+ .suspend = mmc_omap_suspend,
+ .resume = mmc_omap_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+static int __init mmc_omap_init(void)
+{
+ return platform_driver_register(&mmc_omap_driver);
+}
+
+static void __exit mmc_omap_exit(void)
+{
+ platform_driver_unregister(&mmc_omap_driver);
+}
+
+module_init(mmc_omap_init);
+module_exit(mmc_omap_exit);
+
+MODULE_DESCRIPTION("OMAP Multimedia Card driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS(DRIVER_NAME);
+MODULE_AUTHOR("Juha Yrj?l?");
Index: linux-2.6.16-rc3-git6/drivers/mmc/omap.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.16-rc3-git6/drivers/mmc/omap.h 2006-02-16 09:10:05.000000000 -0400
@@ -0,0 +1,55 @@
+#ifndef DRIVERS_MEDIA_MMC_OMAP_H
+#define DRIVERS_MEDIA_MMC_OMAP_H
+
+#define OMAP_MMC_REG_CMD 0x00
+#define OMAP_MMC_REG_ARGL 0x04
+#define OMAP_MMC_REG_ARGH 0x08
+#define OMAP_MMC_REG_CON 0x0c
+#define OMAP_MMC_REG_STAT 0x10
+#define OMAP_MMC_REG_IE 0x14
+#define OMAP_MMC_REG_CTO 0x18
+#define OMAP_MMC_REG_DTO 0x1c
+#define OMAP_MMC_REG_DATA 0x20
+#define OMAP_MMC_REG_BLEN 0x24
+#define OMAP_MMC_REG_NBLK 0x28
+#define OMAP_MMC_REG_BUF 0x2c
+#define OMAP_MMC_REG_SDIO 0x34
+#define OMAP_MMC_REG_REV 0x3c
+#define OMAP_MMC_REG_RSP0 0x40
+#define OMAP_MMC_REG_RSP1 0x44
+#define OMAP_MMC_REG_RSP2 0x48
+#define OMAP_MMC_REG_RSP3 0x4c
+#define OMAP_MMC_REG_RSP4 0x50
+#define OMAP_MMC_REG_RSP5 0x54
+#define OMAP_MMC_REG_RSP6 0x58
+#define OMAP_MMC_REG_RSP7 0x5c
+#define OMAP_MMC_REG_IOSR 0x60
+#define OMAP_MMC_REG_SYSC 0x64
+#define OMAP_MMC_REG_SYSS 0x68
+
+#define OMAP_MMC_STAT_CARD_ERR (1 << 14)
+#define OMAP_MMC_STAT_CARD_IRQ (1 << 13)
+#define OMAP_MMC_STAT_OCR_BUSY (1 << 12)
+#define OMAP_MMC_STAT_A_EMPTY (1 << 11)
+#define OMAP_MMC_STAT_A_FULL (1 << 10)
+#define OMAP_MMC_STAT_CMD_CRC (1 << 8)
+#define OMAP_MMC_STAT_CMD_TOUT (1 << 7)
+#define OMAP_MMC_STAT_DATA_CRC (1 << 6)
+#define OMAP_MMC_STAT_DATA_TOUT (1 << 5)
+#define OMAP_MMC_STAT_END_BUSY (1 << 4)
+#define OMAP_MMC_STAT_END_OF_DATA (1 << 3)
+#define OMAP_MMC_STAT_CARD_BUSY (1 << 2)
+#define OMAP_MMC_STAT_END_OF_CMD (1 << 0)
+
+#define OMAP_MMC_READ(base, reg) __raw_readw((base) + OMAP_MMC_REG_##reg)
+#define OMAP_MMC_WRITE(base, reg, val) __raw_writew((val), (base) + OMAP_MMC_REG_##reg)
+
+/*
+ * Command types
+ */
+#define OMAP_MMC_CMDTYPE_BC 0
+#define OMAP_MMC_CMDTYPE_BCR 1
+#define OMAP_MMC_CMDTYPE_AC 2
+#define OMAP_MMC_CMDTYPE_ADTC 3
+
+#endif
On Thu, Feb 16, 2006 at 10:27:22AM -0400, Carlos Aguiar wrote:
> + /* Any data transfer means adtc type (but that information is not
> + * in command structure, so we flagged it into host struct.)
> + * However, telling bc, bcr and ac apart based on response is
> + * not foolproof:
> + * CMD0 = bc = resp0 CMD15 = ac = resp0
> + * CMD2 = bcr = resp2 CMD10 = ac = resp2
> + *
> + * Resolve to best guess with some exception testing:
> + * resp0 -> bc, except CMD15 = ac
> + * rest are ac, except if opendrain
> + */
> + if (host->data) {
> + cmdtype = OMAP_MMC_CMDTYPE_ADTC;
> + } else if (resptype == 0 && cmd->opcode != 15) {
> + cmdtype = OMAP_MMC_CMDTYPE_BC;
> + } else if (host->bus_mode == MMC_BUSMODE_OPENDRAIN) {
> + cmdtype = OMAP_MMC_CMDTYPE_BCR;
> + } else {
> + cmdtype = OMAP_MMC_CMDTYPE_AC;
> + }
This is no longer necessary - we now supply the command type via
cmd->flags.
> +static void
> +mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
> +{
> + host->cmd = NULL;
> +
if (cmd->flags & MMC_RSP_PRESENT) {
if (cmd->flags & MMC_RSP_136) {
cmd->resp[3] =
OMAP_MMC_READ(host->base, RSP0) |
(OMAP_MMC_READ(host->base, RSP1) << 16);
cmd->resp[2] =
OMAP_MMC_READ(host->base, RSP2) |
(OMAP_MMC_READ(host->base, RSP3) << 16);
cmd->resp[1] =
OMAP_MMC_READ(host->base, RSP4) |
(OMAP_MMC_READ(host->base, RSP5) << 16);
cmd->resp[0] =
OMAP_MMC_READ(host->base, RSP6) |
(OMAP_MMC_READ(host->base, RSP7) << 16);
} else {
cmd->resp[0] =
OMAP_MMC_READ(host->base, RSP6) |
(OMAP_MMC_READ(host->base, RSP7) << 16);
}
}
would be clearer, and probably more efficient. (gcc isn't really
that good at working out bit patterns from switch statements.)
> + /* Optimize the loop a bit by calculating the register only
> + * once */
> + reg = host->base + OMAP_MMC_REG_DATA;
> + p = host->buffer;
> + n /= 2;
> + if (write) {
> + while (n--)
> + __raw_writew(*p++, reg);
> + } else {
> + while (n-- > 0)
> + *p++ = __raw_readw(reg);
> + }
readsw / writesw would be a far more efficient implementation.
> + host->base = (void __iomem *)pdev->resource[0].start;
This is still very very very very wrong. MMIO resources do not contain
virtual addresses. Casting it to a virtual address like this is insane.
> + mmc_add_host(mmc);
At this point the host becomes live. Is the following initialisation
safe to do after the host has been manipulated to talk to MMC cards?
> +
> + if (host->switch_pin >= 0) {
> + INIT_WORK(&host->switch_work, mmc_omap_switch_handler, host);
> + init_timer(&host->switch_timer);
> + host->switch_timer.function = mmc_omap_switch_timer;
> + host->switch_timer.data = (unsigned long) host;
> + if (omap_request_gpio(host->switch_pin) != 0) {
> + printk(KERN_WARNING "MMC%d: Unable to get GPIO pin for MMC cover switch\n",
> + host->id);
> + host->switch_pin = -1;
> + goto no_switch;
> + }
> +
> + omap_set_gpio_direction(host->switch_pin, 1);
> + set_irq_type(OMAP_GPIO_IRQ(host->switch_pin), IRQT_RISING);
> + ret = request_irq(OMAP_GPIO_IRQ(host->switch_pin),
> + mmc_omap_switch_irq, 0, DRIVER_NAME, host);
Don't use set_irq_type, use request_irq with SA_TRIGGER_RISING please.
> + if (host) {
> + mmc_remove_host(host->mmc);
> + free_irq(host->irq, host);
> +#ifdef CONFIG_I2C
> + mmc_omap_power(host, 0);
> +#endif
Power should be turned off by the MMC layer anyway.
> +#ifdef CONFIG_PM
> +static int mmc_omap_suspend(struct platform_device *pdev, pm_message_t mesg)
> +{
> + int ret = 0;
> + struct mmc_omap_host *host = platform_get_drvdata(pdev);
> +
> + if (host && host->suspended)
> + return 0;
> +
> + if (!irqs_disabled())
> + return -EAGAIN;
IRQs will never be disabled here.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
One additional comment on the patch which I missed, and has shown to
be a related cause of problems on a different host controller...
On Thu, Feb 16, 2006 at 10:27:22AM -0400, Carlos Aguiar wrote:
> +static inline void set_data_timeout(struct mmc_omap_host *host, struct mmc_request *req)
> +{
> + int timeout;
> + u16 reg;
> +
> + /* Convert ns to clock cycles by assuming 20MHz frequency
> + * 1 cycle at 20MHz = 500 ns
> + */
> + timeout = req->data->timeout_clks + req->data->timeout_ns / 500;
> +
> + /* Some cards require more time to do at least the first read operation */
> + timeout = timeout << 4;
This is a hack because you got your calculation above wrong. If you
assume a fast clock, the timeout will be too slow for a slower clock.
If you do the calculation correctly and you won't need such hacks.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
Adds OMAP MMC driver.
Signed-off-by: Juha Yrj?l? <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
Signed-off-by: Carlos Aguiar <[email protected]>
Index: linux-2.6.16-rc4-git7/drivers/mmc/Kconfig
===================================================================
--- linux-2.6.16-rc4-git7.orig/drivers/mmc/Kconfig 2006-02-24 10:47:45.000000000 -0400
+++ linux-2.6.16-rc4-git7/drivers/mmc/Kconfig 2006-02-24 10:50:55.000000000 -0400
@@ -49,6 +49,17 @@ config MMC_PXA
If unsure, say N.
+config MMC_OMAP
+ tristate "TI OMAP Multimedia Card Interface support"
+ depends on ARCH_OMAP && MMC
+ select TPS65010 if MACH_OMAP_H2
+ help
+ This selects the TI OMAP Multimedia card Interface.
+ If you have an OMAP board with a Multimedia Card slot,
+ say Y or M here.
+
+ If unsure, say N.
+
config MMC_WBSD
tristate "Winbond W83L51xD SD/MMC Card Interface support"
depends on MMC && ISA_DMA_API
Index: linux-2.6.16-rc4-git7/drivers/mmc/Makefile
===================================================================
--- linux-2.6.16-rc4-git7.orig/drivers/mmc/Makefile 2006-01-02 23:21:10.000000000 -0400
+++ linux-2.6.16-rc4-git7/drivers/mmc/Makefile 2006-02-24 10:50:55.000000000 -0400
@@ -19,5 +19,6 @@ obj-$(CONFIG_MMC_ARMMMCI) += mmci.o
obj-$(CONFIG_MMC_PXA) += pxamci.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
+obj-$(CONFIG_MMC_OMAP) += omap.o
mmc_core-y := mmc.o mmc_queue.o mmc_sysfs.o
Index: linux-2.6.16-rc4-git7/drivers/mmc/omap.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.16-rc4-git7/drivers/mmc/omap.c 2006-02-24 12:31:41.000000000 -0400
@@ -0,0 +1,1247 @@
+/*
+ * linux/drivers/media/mmc/omap.c
+ *
+ * Copyright (C) 2004 Nokia Corporation
+ * Written by Tuukka Tikkanen and Juha Yrj?l?<[email protected]>
+ * Misc hacks here and there by Tony Lindgren <[email protected]>
+ * Other hacks (DMA, SD, etc) by David Brownell
+ *
+ * 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/config.h>
+
+#ifdef CONFIG_MMC_DEBUG
+#define DEBUG /* for dev_dbg(), pr_debug(), etc */
+#endif
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/protocol.h>
+#include <linux/mmc/card.h>
+#include <linux/clk.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/scatterlist.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/board.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/fpga.h>
+#include <asm/arch/tps65010.h>
+
+#include "omap.h"
+
+#define DRIVER_NAME "mmci-omap"
+#define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE))
+
+/* Specifies how often in millisecs to poll for card status changes
+ * when the cover switch is open */
+#define OMAP_MMC_SWITCH_POLL_DELAY 500
+
+static int mmc_omap_enable_poll = 1;
+
+struct mmc_omap_host {
+ int initialized;
+ int suspended;
+ struct mmc_request * mrq;
+ struct mmc_command * cmd;
+ struct mmc_data * data;
+ struct mmc_host * mmc;
+ struct device * dev;
+ unsigned char id; /* 16xx chips have 2 MMC blocks */
+ struct clk * iclk;
+ struct clk * fclk;
+ void __iomem *base;
+ int irq;
+ unsigned char bus_mode;
+ unsigned char hw_bus_mode;
+
+ unsigned int sg_len;
+ int sg_idx;
+ u16 * buffer;
+ u32 buffer_bytes_left;
+ u32 total_bytes_left;
+
+ unsigned use_dma:1;
+ unsigned brs_received:1, dma_done:1;
+ unsigned dma_is_read:1;
+ unsigned dma_in_use:1;
+ int dma_ch;
+ spinlock_t dma_lock;
+ struct timer_list dma_timer;
+ unsigned dma_len;
+
+ short power_pin;
+ short wp_pin;
+
+ int switch_pin;
+ struct work_struct switch_work;
+ struct timer_list switch_timer;
+ int switch_last_state;
+};
+
+static inline int
+mmc_omap_cover_is_open(struct mmc_omap_host *host)
+{
+ if (host->switch_pin < 0)
+ return 0;
+ return omap_get_gpio_datain(host->switch_pin);
+}
+
+static ssize_t
+mmc_omap_show_cover_switch(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mmc_omap_host *host = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", mmc_omap_cover_is_open(host) ? "open" :
+ "closed");
+}
+
+static DEVICE_ATTR(cover_switch, S_IRUGO, mmc_omap_show_cover_switch, NULL);
+
+static ssize_t
+mmc_omap_show_enable_poll(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", mmc_omap_enable_poll);
+}
+
+static ssize_t
+mmc_omap_store_enable_poll(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ int enable_poll;
+
+ if (sscanf(buf, "%10d", &enable_poll) != 1)
+ return -EINVAL;
+
+ if (enable_poll != mmc_omap_enable_poll) {
+ struct mmc_omap_host *host = dev_get_drvdata(dev);
+
+ mmc_omap_enable_poll = enable_poll;
+ if (enable_poll && host->switch_pin >= 0)
+ schedule_work(&host->switch_work);
+ }
+ return size;
+}
+
+static DEVICE_ATTR(enable_poll, 0664,
+ mmc_omap_show_enable_poll, mmc_omap_store_enable_poll);
+
+static void
+mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
+{
+ u32 cmdreg;
+ u32 resptype;
+ u32 cmdtype;
+
+ host->cmd = cmd;
+
+ resptype = 0;
+ cmdtype = 0;
+
+ /* Our hardware needs to know exact type */
+ switch (RSP_TYPE(mmc_resp_type(cmd))) {
+ case RSP_TYPE(MMC_RSP_R1):
+ /* resp 1, resp 1b */
+ resptype = 1;
+ break;
+ case RSP_TYPE(MMC_RSP_R2):
+ resptype = 2;
+ break;
+ case RSP_TYPE(MMC_RSP_R3):
+ resptype = 3;
+ break;
+ default:
+ break;
+ }
+
+ if (mmc_cmd_type(cmd) == MMC_CMD_ADTC) {
+ cmdtype = OMAP_MMC_CMDTYPE_ADTC;
+ } else if (mmc_cmd_type(cmd) == MMC_CMD_BC) {
+ cmdtype = OMAP_MMC_CMDTYPE_BC;
+ } else if (mmc_cmd_type(cmd) == MMC_CMD_BCR) {
+ cmdtype = OMAP_MMC_CMDTYPE_BCR;
+ } else {
+ cmdtype = OMAP_MMC_CMDTYPE_AC;
+ }
+
+ cmdreg = cmd->opcode | (resptype << 8) | (cmdtype << 12);
+
+ if (host->bus_mode == MMC_BUSMODE_OPENDRAIN)
+ cmdreg |= 1 << 6;
+
+ if (cmd->flags & MMC_RSP_BUSY)
+ cmdreg |= 1 << 11;
+
+ if (host->data && !(host->data->flags & MMC_DATA_WRITE))
+ cmdreg |= 1 << 15;
+
+ clk_enable(host->fclk);
+
+ OMAP_MMC_WRITE(host->base, CTO, 200);
+ OMAP_MMC_WRITE(host->base, ARGL, cmd->arg & 0xffff);
+ OMAP_MMC_WRITE(host->base, ARGH, cmd->arg >> 16);
+ OMAP_MMC_WRITE(host->base, IE,
+ OMAP_MMC_STAT_A_EMPTY | OMAP_MMC_STAT_A_FULL |
+ OMAP_MMC_STAT_CMD_CRC | OMAP_MMC_STAT_CMD_TOUT |
+ OMAP_MMC_STAT_DATA_CRC | OMAP_MMC_STAT_DATA_TOUT |
+ OMAP_MMC_STAT_END_OF_CMD | OMAP_MMC_STAT_CARD_ERR |
+ OMAP_MMC_STAT_END_OF_DATA);
+ OMAP_MMC_WRITE(host->base, CMD, cmdreg);
+}
+
+static void
+mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ if (host->dma_in_use) {
+ enum dma_data_direction dma_data_dir;
+
+ BUG_ON(host->dma_ch < 0);
+ if (data->error != MMC_ERR_NONE)
+ omap_stop_dma(host->dma_ch);
+ /* Release DMA channel lazily */
+ mod_timer(&host->dma_timer, jiffies + HZ);
+ if (data->flags & MMC_DATA_WRITE)
+ dma_data_dir = DMA_TO_DEVICE;
+ else
+ dma_data_dir = DMA_FROM_DEVICE;
+ dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
+ dma_data_dir);
+ }
+ host->data = NULL;
+ host->sg_len = 0;
+ clk_disable(host->fclk);
+
+ /* NOTE: MMC layer will sometimes poll-wait CMD13 next, issuing
+ * dozens of requests until the card finishes writing data.
+ * It'd be cheaper to just wait till an EOFB interrupt arrives...
+ */
+
+ if (!data->stop) {
+ host->mrq = NULL;
+ mmc_request_done(host->mmc, data->mrq);
+ return;
+ }
+
+ mmc_omap_start_command(host, data->stop);
+}
+
+static void
+mmc_omap_end_of_data(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ unsigned long flags;
+ int done;
+
+ if (!host->dma_in_use) {
+ mmc_omap_xfer_done(host, data);
+ return;
+ }
+ done = 0;
+ spin_lock_irqsave(&host->dma_lock, flags);
+ if (host->dma_done)
+ done = 1;
+ else
+ host->brs_received = 1;
+ spin_unlock_irqrestore(&host->dma_lock, flags);
+ if (done)
+ mmc_omap_xfer_done(host, data);
+}
+
+static void
+mmc_omap_dma_timer(unsigned long data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+
+ BUG_ON(host->dma_ch < 0);
+ omap_free_dma(host->dma_ch);
+ host->dma_ch = -1;
+}
+
+static void
+mmc_omap_dma_done(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ unsigned long flags;
+ int done;
+
+ done = 0;
+ spin_lock_irqsave(&host->dma_lock, flags);
+ if (host->brs_received)
+ done = 1;
+ else
+ host->dma_done = 1;
+ spin_unlock_irqrestore(&host->dma_lock, flags);
+ if (done)
+ mmc_omap_xfer_done(host, data);
+}
+
+static void
+mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
+{
+ host->cmd = NULL;
+
+ if (cmd->flags & MMC_RSP_PRESENT) {
+ if (cmd->flags & MMC_RSP_136) {
+ /* response type 2 */
+ cmd->resp[3] =
+ OMAP_MMC_READ(host->base, RSP0) |
+ (OMAP_MMC_READ(host->base, RSP1) << 16);
+ cmd->resp[2] =
+ OMAP_MMC_READ(host->base, RSP2) |
+ (OMAP_MMC_READ(host->base, RSP3) << 16);
+ cmd->resp[1] =
+ OMAP_MMC_READ(host->base, RSP4) |
+ (OMAP_MMC_READ(host->base, RSP5) << 16);
+ cmd->resp[0] =
+ OMAP_MMC_READ(host->base, RSP6) |
+ (OMAP_MMC_READ(host->base, RSP7) << 16);
+ } else {
+ /* response types 1, 1b, 3, 4, 5, 6 */
+ cmd->resp[0] =
+ OMAP_MMC_READ(host->base, RSP6) |
+ (OMAP_MMC_READ(host->base, RSP7) << 16);
+ }
+ }
+
+ if (host->data == NULL || cmd->error != MMC_ERR_NONE) {
+ host->mrq = NULL;
+ clk_disable(host->fclk);
+ mmc_request_done(host->mmc, cmd->mrq);
+ }
+}
+
+/* PIO only */
+static void
+mmc_omap_sg_to_buf(struct mmc_omap_host *host)
+{
+ struct scatterlist *sg;
+
+ sg = host->data->sg + host->sg_idx;
+ host->buffer_bytes_left = sg->length;
+ host->buffer = page_address(sg->page) + sg->offset;
+ if (host->buffer_bytes_left > host->total_bytes_left)
+ host->buffer_bytes_left = host->total_bytes_left;
+}
+
+/* PIO only */
+static void
+mmc_omap_xfer_data(struct mmc_omap_host *host, int write)
+{
+ int n;
+ void __iomem *reg;
+ u16 *p;
+
+ if (host->buffer_bytes_left == 0) {
+ host->sg_idx++;
+ BUG_ON(host->sg_idx == host->sg_len);
+ mmc_omap_sg_to_buf(host);
+ }
+ n = 64;
+ if (n > host->buffer_bytes_left)
+ n = host->buffer_bytes_left;
+ host->buffer_bytes_left -= n;
+ host->total_bytes_left -= n;
+ host->data->bytes_xfered += n;
+
+ /* Optimize the loop a bit by calculating the register only
+ * once */
+ reg = host->base + OMAP_MMC_REG_DATA;
+ p = host->buffer;
+ n /= 2;
+ if (write) {
+ while (n--)
+ __raw_writew(*p++, reg);
+ } else {
+ while (n-- > 0)
+ *p++ = __raw_readw(reg);
+ }
+ host->buffer = p;
+}
+
+static inline void mmc_omap_report_irq(u16 status)
+{
+ static const char *mmc_omap_status_bits[] = {
+ "EOC", "CD", "CB", "BRS", "EOFB", "DTO", "DCRC", "CTO",
+ "CCRC", "CRW", "AF", "AE", "OCRB", "CIRQ", "CERR"
+ };
+ int i, c = 0;
+
+ for (i = 0; i < ARRAY_SIZE(mmc_omap_status_bits); i++)
+ if (status & (1 << i)) {
+ if (c)
+ printk(" ");
+ printk("%s", mmc_omap_status_bits[i]);
+ c++;
+ }
+}
+
+static irqreturn_t mmc_omap_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct mmc_omap_host * host = (struct mmc_omap_host *)dev_id;
+ u16 status;
+ int end_command;
+ int end_transfer;
+ int transfer_error;
+
+ if (host->cmd == NULL && host->data == NULL) {
+ status = OMAP_MMC_READ(host->base, STAT);
+ printk(KERN_INFO "MMC%d: Spurious interrupt 0x%04x\n",
+ host->id, status);
+ if (status != 0) {
+ OMAP_MMC_WRITE(host->base, STAT, status);
+ OMAP_MMC_WRITE(host->base, IE, 0);
+ }
+ return IRQ_HANDLED;
+ }
+
+ end_command = 0;
+ end_transfer = 0;
+ transfer_error = 0;
+
+ while ((status = OMAP_MMC_READ(host->base, STAT)) != 0) {
+ OMAP_MMC_WRITE(host->base, STAT, status);
+#ifdef CONFIG_MMC_DEBUG
+ printk(KERN_DEBUG "MMC IRQ %04x (CMD %d): ", status,
+ host->cmd != NULL ? host->cmd->opcode : -1);
+ mmc_omap_report_irq(status);
+ printk("\n");
+#endif
+ if (host->total_bytes_left) {
+ if ((status & OMAP_MMC_STAT_A_FULL) ||
+ (status & OMAP_MMC_STAT_END_OF_DATA))
+ mmc_omap_xfer_data(host, 0);
+ if (status & OMAP_MMC_STAT_A_EMPTY)
+ mmc_omap_xfer_data(host, 1);
+ }
+
+ if (status & OMAP_MMC_STAT_END_OF_DATA) {
+ end_transfer = 1;
+ }
+
+ if (status & OMAP_MMC_STAT_DATA_TOUT) {
+ dev_dbg(mmc_dev(host->mmc), "MMC%d: Data timeout\n",
+ host->id);
+ if (host->data) {
+ host->data->error |= MMC_ERR_TIMEOUT;
+ transfer_error = 1;
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_DATA_CRC) {
+ if (host->data) {
+ host->data->error |= MMC_ERR_BADCRC;
+ dev_dbg(mmc_dev(host->mmc), "MMC%d: Data CRC
+ error, bytes left %d\n",
+ host->id,
+ host->total_bytes_left);
+ transfer_error = 1;
+ } else {
+ dev_dbg(mmc_dev(host->mmc), "MMC%d: Data CRC
+ error\n", host->id);
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_CMD_TOUT) {
+ /* Timeouts are routine with some commands */
+ if (host->cmd) {
+ if (host->cmd->opcode != MMC_ALL_SEND_CID &&
+ host->cmd->opcode !=
+ MMC_SEND_OP_COND &&
+ host->cmd->opcode !=
+ MMC_APP_CMD &&
+ !mmc_omap_cover_is_open(host))
+ dev_err(mmc_dev(host->mmc), "MMC%d:
+ Command timeout,
+ CMD%d\n", host->id,
+ host->cmd->opcode);
+ host->cmd->error = MMC_ERR_TIMEOUT;
+ end_command = 1;
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_CMD_CRC) {
+ if (host->cmd) {
+ dev_err(mmc_dev(host->mmc), "MMC%d: Command CRC
+ error (CMD%d, arg 0x%08x)\n",
+ host->id, host->cmd->opcode,
+ host->cmd->arg);
+ host->cmd->error = MMC_ERR_BADCRC;
+ end_command = 1;
+ } else
+ dev_err(mmc_dev(host->mmc), "MMC%d: Command CRC
+ error without cmd?\n",
+ host->id);
+ }
+
+ if (status & OMAP_MMC_STAT_CARD_ERR) {
+ if (host->cmd && host->cmd->opcode == MMC_STOP_TRANSMISSION) {
+ u32 response = OMAP_MMC_READ(host->base, RSP6)
+ | (OMAP_MMC_READ(host->base, RSP7) << 16);
+ /* STOP sometimes sets must-ignore bits */
+ if (!(response & (R1_CC_ERROR
+ | R1_ILLEGAL_COMMAND
+ | R1_COM_CRC_ERROR))) {
+ end_command = 1;
+ continue;
+ }
+ }
+
+ dev_dbg(mmc_dev(host->mmc), "MMC%d: Card status error (CMD%d)\n",
+ host->id, host->cmd->opcode);
+ if (host->cmd) {
+ host->cmd->error = MMC_ERR_FAILED;
+ end_command = 1;
+ }
+ if (host->data) {
+ host->data->error = MMC_ERR_FAILED;
+ transfer_error = 1;
+ }
+ }
+
+ /*
+ * NOTE: On 1610 the END_OF_CMD may come too early when
+ * starting a write
+ */
+ if ((status & OMAP_MMC_STAT_END_OF_CMD) &&
+ (!(status & OMAP_MMC_STAT_A_EMPTY))) {
+ end_command = 1;
+ }
+ }
+
+ if (end_command) {
+ mmc_omap_cmd_done(host, host->cmd);
+ }
+ if (transfer_error)
+ mmc_omap_xfer_done(host, host->data);
+ else if (end_transfer)
+ mmc_omap_end_of_data(host, host->data);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mmc_omap_switch_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) dev_id;
+
+ schedule_work(&host->switch_work);
+
+ return IRQ_HANDLED;
+}
+
+static void mmc_omap_switch_timer(unsigned long arg)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) arg;
+
+ schedule_work(&host->switch_work);
+}
+
+/* FIXME: Handle card insertion and removal properly. Maybe use a mask
+ * for MMC state? */
+static void mmc_omap_switch_callback(unsigned long data, u8 mmc_mask)
+{
+}
+
+static void mmc_omap_switch_handler(void *data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+ struct mmc_card *card;
+ static int complained = 0;
+ int cards = 0, cover_open;
+
+ if (host->switch_pin == -1)
+ return;
+ cover_open = mmc_omap_cover_is_open(host);
+ if (cover_open != host->switch_last_state) {
+ kobject_uevent(&host->dev->kobj, KOBJ_CHANGE);
+ host->switch_last_state = cover_open;
+ }
+ mmc_detect_change(host->mmc, 0);
+ list_for_each_entry(card, &host->mmc->cards, node) {
+ if (mmc_card_present(card))
+ cards++;
+ }
+ if (mmc_omap_cover_is_open(host)) {
+ if (!complained) {
+ printk(KERN_INFO "MMC%d: cover is open\n", host->id);
+ complained = 1;
+ }
+ if (mmc_omap_enable_poll)
+ mod_timer(&host->switch_timer, jiffies +
+ msecs_to_jiffies(OMAP_MMC_SWITCH_POLL_DELAY));
+ } else {
+ complained = 0;
+ }
+}
+
+/* Prepare to transfer the next segment of a scatterlist */
+static void
+mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ int dma_ch = host->dma_ch;
+ unsigned long data_addr;
+ u16 buf, frame;
+ u32 count;
+ struct scatterlist *sg = &data->sg[host->sg_idx];
+ int src_port = 0;
+ int dst_port = 0;
+ int sync_dev = 0;
+
+ data_addr = io_v2p((u32) host->base) + OMAP_MMC_REG_DATA;
+ frame = 1 << data->blksz_bits;
+ count = sg_dma_len(sg);
+
+ if ((data->blocks == 1) && (count > (1 << data->blksz_bits)))
+ count = frame;
+
+ host->dma_len = count;
+
+ /* FIFO is 16x2 bytes on 15xx, and 32x2 bytes on 16xx and 24xx.
+ * Use 16 or 32 word frames when the blocksize is at least that large.
+ * Blocksize is usually 512 bytes; but not for some SD reads.
+ */
+ if (cpu_is_omap15xx() && frame > 32)
+ frame = 32;
+ else if (frame > 64)
+ frame = 64;
+ count /= frame;
+ frame >>= 1;
+
+ if (!(data->flags & MMC_DATA_WRITE)) {
+ buf = 0x800f | ((frame - 1) << 8);
+
+ if (cpu_class_is_omap1()) {
+ src_port = OMAP_DMA_PORT_TIPB;
+ dst_port = OMAP_DMA_PORT_EMIFF;
+ }
+ if (cpu_is_omap24xx())
+ sync_dev = OMAP24XX_DMA_MMC1_RX;
+
+ omap_set_dma_src_params(dma_ch, src_port,
+ OMAP_DMA_AMODE_CONSTANT,
+ data_addr, 0, 0);
+ omap_set_dma_dest_params(dma_ch, dst_port,
+ OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sg), 0, 0);
+ omap_set_dma_dest_data_pack(dma_ch, 1);
+ omap_set_dma_dest_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
+ } else {
+ buf = 0x0f80 | ((frame - 1) << 0);
+
+ if (cpu_class_is_omap1()) {
+ src_port = OMAP_DMA_PORT_EMIFF;
+ dst_port = OMAP_DMA_PORT_TIPB;
+ }
+ if (cpu_is_omap24xx())
+ sync_dev = OMAP24XX_DMA_MMC1_TX;
+
+ omap_set_dma_dest_params(dma_ch, dst_port,
+ OMAP_DMA_AMODE_CONSTANT,
+ data_addr, 0, 0);
+ omap_set_dma_src_params(dma_ch, src_port,
+ OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sg), 0, 0);
+ omap_set_dma_src_data_pack(dma_ch, 1);
+ omap_set_dma_src_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
+ }
+
+ /* Max limit for DMA frame count is 0xffff */
+ if (unlikely(count > 0xffff))
+ BUG();
+
+ OMAP_MMC_WRITE(host->base, BUF, buf);
+ omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S16,
+ frame, count, OMAP_DMA_SYNC_FRAME,
+ sync_dev, 0);
+}
+
+/* A scatterlist segment completed */
+static void mmc_omap_dma_cb(int lch, u16 ch_status, void *data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+ struct mmc_data *mmcdat = host->data;
+
+ if (unlikely(host->dma_ch < 0)) {
+ dev_err(mmc_dev(host->mmc), "MMC%d: DMA callback while DMA not
+ enabled\n", host->id);
+ return;
+ }
+ /* FIXME: We really should do something to _handle_ the errors */
+ if (ch_status & OMAP_DMA_TOUT_IRQ) {
+ dev_err(mmc_dev(host->mmc),"MMC%d: DMA timeout\n", host->id);
+ return;
+ }
+ if (ch_status & OMAP_DMA_DROP_IRQ) {
+ dev_err(mmc_dev(host->mmc), "MMC%d: DMA sync error\n",
+ host->id);
+ return;
+ }
+ if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
+ return;
+ }
+ mmcdat->bytes_xfered += host->dma_len;
+ host->sg_idx++;
+ if (host->sg_idx < host->sg_len) {
+ mmc_omap_prepare_dma(host, host->data);
+ omap_start_dma(host->dma_ch);
+ } else
+ mmc_omap_dma_done(host, host->data);
+}
+
+static int mmc_omap_get_dma_channel(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ const char *dev_name;
+ int sync_dev, dma_ch, is_read, r;
+
+ is_read = !(data->flags & MMC_DATA_WRITE);
+ del_timer_sync(&host->dma_timer);
+ if (host->dma_ch >= 0) {
+ if (is_read == host->dma_is_read)
+ return 0;
+ omap_free_dma(host->dma_ch);
+ host->dma_ch = -1;
+ }
+
+ if (is_read) {
+ if (host->id == 1) {
+ sync_dev = OMAP_DMA_MMC_RX;
+ dev_name = "MMC1 read";
+ } else {
+ sync_dev = OMAP_DMA_MMC2_RX;
+ dev_name = "MMC2 read";
+ }
+ } else {
+ if (host->id == 1) {
+ sync_dev = OMAP_DMA_MMC_TX;
+ dev_name = "MMC1 write";
+ } else {
+ sync_dev = OMAP_DMA_MMC2_TX;
+ dev_name = "MMC2 write";
+ }
+ }
+ r = omap_request_dma(sync_dev, dev_name, mmc_omap_dma_cb,
+ host, &dma_ch);
+ if (r != 0) {
+ printk("MMC%d: omap_request_dma() failed with %d\n",
+ host->id, r);
+ return r;
+ }
+ host->dma_ch = dma_ch;
+ host->dma_is_read = is_read;
+
+ return 0;
+}
+
+static inline void set_cmd_timeout(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ u16 reg;
+
+ reg = OMAP_MMC_READ(host->base, SDIO);
+ reg &= ~(1 << 5);
+ OMAP_MMC_WRITE(host->base, SDIO, reg);
+ /* Set maximum timeout */
+ OMAP_MMC_WRITE(host->base, CTO, 0xff);
+}
+
+static inline void set_data_timeout(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ int timeout;
+ u16 reg;
+
+ /* Convert ns to clock cycles by assuming 20MHz frequency
+ * 1 cycle at 20MHz = 500 ns
+ */
+ timeout = req->data->timeout_clks + req->data->timeout_ns / 500;
+
+ /* Check if we need to use timeout multiplier register */
+ reg = OMAP_MMC_READ(host->base, SDIO);
+ if (timeout > 0xffff) {
+ reg |= (1 << 5);
+ timeout /= 1024;
+ } else
+ reg &= ~(1 << 5);
+ OMAP_MMC_WRITE(host->base, SDIO, reg);
+ OMAP_MMC_WRITE(host->base, DTO, timeout);
+}
+
+static void
+mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ struct mmc_data *data = req->data;
+ int i, use_dma, block_size;
+ unsigned sg_len;
+
+ host->data = data;
+ if (data == NULL) {
+ OMAP_MMC_WRITE(host->base, BLEN, 0);
+ OMAP_MMC_WRITE(host->base, NBLK, 0);
+ OMAP_MMC_WRITE(host->base, BUF, 0);
+ host->dma_in_use = 0;
+ set_cmd_timeout(host, req);
+ return;
+ }
+
+
+ block_size = 1 << data->blksz_bits;
+
+ OMAP_MMC_WRITE(host->base, NBLK, data->blocks - 1);
+ OMAP_MMC_WRITE(host->base, BLEN, block_size - 1);
+ set_data_timeout(host, req);
+
+ /* cope with calling layer confusion; it issues "single
+ * block" writes using multi-block scatterlists.
+ */
+ sg_len = (data->blocks == 1) ? 1 : data->sg_len;
+
+ /* Only do DMA for entire blocks */
+ use_dma = host->use_dma;
+ if (use_dma) {
+ for (i = 0; i < sg_len; i++) {
+ if ((data->sg[i].length % block_size) != 0) {
+ use_dma = 0;
+ break;
+ }
+ }
+ }
+
+ host->sg_idx = 0;
+ if (use_dma) {
+ if (mmc_omap_get_dma_channel(host, data) == 0) {
+ enum dma_data_direction dma_data_dir;
+
+ if (data->flags & MMC_DATA_WRITE)
+ dma_data_dir = DMA_TO_DEVICE;
+ else
+ dma_data_dir = DMA_FROM_DEVICE;
+
+ host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
+ sg_len, dma_data_dir);
+ host->total_bytes_left = 0;
+ mmc_omap_prepare_dma(host, req->data);
+ host->brs_received = 0;
+ host->dma_done = 0;
+ host->dma_in_use = 1;
+ } else
+ use_dma = 0;
+ }
+
+ /* Revert to PIO? */
+ if (!use_dma) {
+ OMAP_MMC_WRITE(host->base, BUF, 0x1f1f);
+ host->total_bytes_left = data->blocks * block_size;
+ host->sg_len = sg_len;
+ mmc_omap_sg_to_buf(host);
+ host->dma_in_use = 0;
+ }
+}
+
+static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ WARN_ON(host->mrq != NULL);
+
+ host->mrq = req;
+
+ /* only touch fifo AFTER the controller readies it */
+ mmc_omap_prepare_data(host, req);
+ mmc_omap_start_command(host, req->cmd);
+ if (host->dma_in_use)
+ omap_start_dma(host->dma_ch);
+}
+
+static void innovator_fpga_socket_power(int on)
+{
+#if defined(CONFIG_MACH_OMAP_INNOVATOR) && defined(CONFIG_ARCH_OMAP15XX)
+
+ if (on) {
+ fpga_write(fpga_read(OMAP1510_FPGA_POWER) | (1 << 3),
+ OMAP1510_FPGA_POWER);
+ } else {
+ fpga_write(fpga_read(OMAP1510_FPGA_POWER) & ~(1 << 3),
+ OMAP1510_FPGA_POWER);
+ }
+#endif
+}
+
+/*
+ * Turn the socket power on/off. Innovator uses FPGA, most boards
+ * probably use GPIO.
+ */
+static void mmc_omap_power(struct mmc_omap_host *host, int on)
+{
+ if (on) {
+ if (machine_is_omap_innovator())
+ innovator_fpga_socket_power(1);
+ else if (machine_is_omap_h2())
+ tps65010_set_gpio_out_value(GPIO3, HIGH);
+ else if (machine_is_omap_h3())
+ /* GPIO 4 of TPS65010 sends SD_EN signal */
+ tps65010_set_gpio_out_value(GPIO4, HIGH);
+ else if (cpu_is_omap24xx()) {
+ u16 reg = OMAP_MMC_READ(host->base, CON);
+ OMAP_MMC_WRITE(host->base, CON, reg | (1 << 11));
+ } else
+ if (host->power_pin >= 0)
+ omap_set_gpio_dataout(host->power_pin, 1);
+ } else {
+ if (machine_is_omap_innovator())
+ innovator_fpga_socket_power(0);
+ else if (machine_is_omap_h2())
+ tps65010_set_gpio_out_value(GPIO3, LOW);
+ else if (machine_is_omap_h3())
+ tps65010_set_gpio_out_value(GPIO4, LOW);
+ else if (cpu_is_omap24xx()) {
+ u16 reg = OMAP_MMC_READ(host->base, CON);
+ OMAP_MMC_WRITE(host->base, CON, reg & ~(1 << 11));
+ } else
+ if (host->power_pin >= 0)
+ omap_set_gpio_dataout(host->power_pin, 0);
+ }
+}
+
+static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+ int dsor;
+ int realclock, i;
+
+ realclock = ios->clock;
+
+ if (ios->clock == 0)
+ dsor = 0;
+ else {
+ int func_clk_rate = clk_get_rate(host->fclk);
+
+ dsor = func_clk_rate / realclock;
+ if (dsor < 1)
+ dsor = 1;
+
+ if (func_clk_rate / dsor > realclock)
+ dsor++;
+
+ if (dsor > 250)
+ dsor = 250;
+ dsor++;
+
+ if (ios->bus_width == MMC_BUS_WIDTH_4)
+ dsor |= 1 << 15;
+ }
+
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF:
+ mmc_omap_power(host, 0);
+ break;
+ case MMC_POWER_UP:
+ case MMC_POWER_ON:
+ mmc_omap_power(host, 1);
+ dsor |= 1<<11;
+ break;
+ }
+
+ host->bus_mode = ios->bus_mode;
+ host->hw_bus_mode = host->bus_mode;
+
+ clk_enable(host->fclk);
+
+ /* On insanely high arm_per frequencies something sometimes
+ * goes somehow out of sync, and the POW bit is not being set,
+ * which results in the while loop below getting stuck.
+ * Writing to the CON register twice seems to do the trick. */
+ for (i = 0; i < 2; i++)
+ OMAP_MMC_WRITE(host->base, CON, dsor);
+ if (ios->power_mode == MMC_POWER_UP) {
+ /* Send clock cycles, poll completion */
+ OMAP_MMC_WRITE(host->base, IE, 0);
+ OMAP_MMC_WRITE(host->base, STAT, 0xffff);
+ OMAP_MMC_WRITE(host->base, CMD, 1<<7);
+ while (0 == (OMAP_MMC_READ(host->base, STAT) & 1));
+ OMAP_MMC_WRITE(host->base, STAT, 1);
+ }
+ clk_disable(host->fclk);
+}
+
+static int mmc_omap_get_ro(struct mmc_host *mmc)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ return host->wp_pin && omap_get_gpio_datain(host->wp_pin);
+}
+
+static struct mmc_host_ops mmc_omap_ops = {
+ .request = mmc_omap_request,
+ .set_ios = mmc_omap_set_ios,
+ .get_ro = mmc_omap_get_ro,
+};
+
+static int __init mmc_omap_probe(struct platform_device *pdev)
+{
+ struct omap_mmc_conf *minfo = pdev->dev.platform_data;
+ struct mmc_host *mmc;
+ struct mmc_omap_host *host = NULL;
+ int ret = 0;
+
+ if (platform_get_resource(pdev, IORESOURCE_MEM, 0) ||
+ platform_get_irq(pdev, IORESOURCE_IRQ, 0)) {
+ dev_err(&pdev->dev, "mmc_omap_probe: invalid resource type\n");
+ return -ENODEV;
+ }
+
+ if (!request_mem_region(pdev->resource[0].start,
+ pdev->resource[0].end - pdev->resource[0].start + 1,
+ pdev->name)) {
+ dev_dbg(&pdev->dev, "request_mem_region failed\n");
+ return -EBUSY;
+ }
+
+ mmc = mmc_alloc_host(sizeof(struct mmc_omap_host), &pdev->dev);
+ if (!mmc) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ host = mmc_priv(mmc);
+ host->mmc = mmc;
+
+ spin_lock_init(&host->dma_lock);
+ init_timer(&host->dma_timer);
+ host->dma_timer.function = mmc_omap_dma_timer;
+ host->dma_timer.data = (unsigned long) host;
+
+ host->id = pdev->id;
+
+ if (cpu_is_omap24xx()) {
+ host->iclk = clk_get(&pdev->dev, "mmc_ick");
+ if (IS_ERR(host->iclk))
+ goto out;
+ clk_enable(host->iclk);
+ }
+
+ if (!cpu_is_omap24xx())
+ host->fclk = clk_get(&pdev->dev, "mmc_ck");
+ else
+ host->fclk = clk_get(&pdev->dev, "mmc_fck");
+
+ if (IS_ERR(host->fclk)) {
+ ret = PTR_ERR(host->fclk);
+ goto out;
+ }
+
+ /* REVISIT:
+ * Also, use minfo->cover to decide how to manage
+ * the card detect sensing.
+ */
+ host->power_pin = minfo->power_pin;
+ host->switch_pin = minfo->switch_pin;
+ host->wp_pin = minfo->wp_pin;
+ host->use_dma = 1;
+ host->dma_ch = -1;
+
+ host->irq = pdev->resource[1].start;
+ host->base = ioremap(pdev->res.start, SZ_4K);
+
+ if (minfo->wire4)
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
+
+ mmc->ops = &mmc_omap_ops;
+ mmc->f_min = 400000;
+ mmc->f_max = 24000000;
+ mmc->ocr_avail = MMC_VDD_33_34;
+
+ /* Use scatterlist DMA to reduce per-transfer costs.
+ * NOTE max_seg_size assumption that small blocks aren't
+ * normally used (except e.g. for reading SD registers).
+ */
+ mmc->max_phys_segs = 32;
+ mmc->max_hw_segs = 32;
+ mmc->max_sectors = 256; /* NBLK max 11-bits, OMAP also limited by DMA */
+ mmc->max_seg_size = mmc->max_sectors * 512;
+
+ if (host->power_pin >= 0) {
+ if ((ret = omap_request_gpio(host->power_pin)) != 0) {
+ dev_err(mmc_dev(host->mmc), "MMC%d: Unable to get GPIO
+ pin for MMC power\n", host->id);
+ goto out;
+ }
+ omap_set_gpio_direction(host->power_pin, 0);
+ }
+
+ ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
+ if (ret)
+ goto out;
+
+ host->dev = &pdev->dev;
+ platform_set_drvdata(pdev, host);
+
+ mmc_add_host(mmc);
+
+ if (host->switch_pin >= 0) {
+ INIT_WORK(&host->switch_work, mmc_omap_switch_handler, host);
+ init_timer(&host->switch_timer);
+ host->switch_timer.function = mmc_omap_switch_timer;
+ host->switch_timer.data = (unsigned long) host;
+ if (omap_request_gpio(host->switch_pin) != 0) {
+ printk(KERN_WARNING "MMC%d: Unable to get GPIO pin for MMC cover switch\n",
+ host->id);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+
+ omap_set_gpio_direction(host->switch_pin, 1);
+ ret = request_irq(OMAP_GPIO_IRQ(host->switch_pin),
+ mmc_omap_switch_irq, SA_TRIGGER_RISING, DRIVER_NAME, host);
+ if (ret) {
+ printk(KERN_WARNING "MMC%d: Unable to get IRQ for MMC cover switch\n",
+ host->id);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+ ret = device_create_file(&pdev->dev, &dev_attr_cover_switch);
+ if (ret == 0) {
+ ret = device_create_file(&pdev->dev, &dev_attr_enable_poll);
+ if (ret != 0)
+ device_remove_file(&pdev->dev, &dev_attr_cover_switch);
+ }
+ if (ret) {
+ printk(KERN_WARNING "MMC%d: Unable to create sysfs attributes\n",
+ host->id);
+ free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+ if (mmc_omap_enable_poll && mmc_omap_cover_is_open(host))
+ schedule_work(&host->switch_work);
+ }
+
+no_switch:
+ return 0;
+
+out:
+ /* FIXME: Free other resources too. */
+ if (host) {
+ if (host->iclk && !IS_ERR(host->iclk))
+ clk_put(host->iclk);
+ if (host->fclk && !IS_ERR(host->fclk))
+ clk_put(host->fclk);
+ mmc_free_host(host->mmc);
+ }
+ return ret;
+}
+
+static int mmc_omap_remove(struct platform_device *pdev)
+{
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (host) {
+ mmc_remove_host(host->mmc);
+ free_irq(host->irq, host);
+
+ if (host->power_pin >= 0)
+ omap_free_gpio(host->power_pin);
+ if (host->switch_pin >= 0) {
+ device_remove_file(&pdev->dev, &dev_attr_enable_poll);
+ device_remove_file(&pdev->dev, &dev_attr_cover_switch);
+ free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ del_timer_sync(&host->switch_timer);
+ flush_scheduled_work();
+ }
+ if (host->iclk && !IS_ERR(host->iclk))
+ clk_put(host->iclk);
+ if (host->fclk && !IS_ERR(host->fclk))
+ clk_put(host->fclk);
+ mmc_free_host(host->mmc);
+ }
+
+ release_mem_region(pdev->resource[0].start,
+ pdev->resource[0].end - pdev->resource[0].start + 1);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int mmc_omap_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ int ret = 0;
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ if (host && host->suspended)
+ return 0;
+
+ if (host) {
+ ret = mmc_suspend_host(host->mmc, mesg);
+ if (ret == 0)
+ host->suspended = 1;
+ }
+ return ret;
+}
+
+static int mmc_omap_resume(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ if (host && !host->suspended)
+ return 0;
+
+ if (host) {
+ ret = mmc_resume_host(host->mmc);
+ if (ret == 0)
+ host->suspended = 0;
+ }
+
+ return ret;
+}
+#else
+#define mmc_omap_suspend NULL
+#define mmc_omap_resume NULL
+#endif
+
+static struct platform_driver mmc_omap_driver = {
+ .probe = mmc_omap_probe,
+ .remove = mmc_omap_remove,
+ .suspend = mmc_omap_suspend,
+ .resume = mmc_omap_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+static int __init mmc_omap_init(void)
+{
+ return platform_driver_register(&mmc_omap_driver);
+}
+
+static void __exit mmc_omap_exit(void)
+{
+ platform_driver_unregister(&mmc_omap_driver);
+}
+
+module_init(mmc_omap_init);
+module_exit(mmc_omap_exit);
+
+MODULE_DESCRIPTION("OMAP Multimedia Card driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS(DRIVER_NAME);
+MODULE_AUTHOR("Juha Yrj?l?");
Index: linux-2.6.16-rc4-git7/drivers/mmc/omap.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.16-rc4-git7/drivers/mmc/omap.h 2006-02-24 10:50:55.000000000 -0400
@@ -0,0 +1,55 @@
+#ifndef DRIVERS_MEDIA_MMC_OMAP_H
+#define DRIVERS_MEDIA_MMC_OMAP_H
+
+#define OMAP_MMC_REG_CMD 0x00
+#define OMAP_MMC_REG_ARGL 0x04
+#define OMAP_MMC_REG_ARGH 0x08
+#define OMAP_MMC_REG_CON 0x0c
+#define OMAP_MMC_REG_STAT 0x10
+#define OMAP_MMC_REG_IE 0x14
+#define OMAP_MMC_REG_CTO 0x18
+#define OMAP_MMC_REG_DTO 0x1c
+#define OMAP_MMC_REG_DATA 0x20
+#define OMAP_MMC_REG_BLEN 0x24
+#define OMAP_MMC_REG_NBLK 0x28
+#define OMAP_MMC_REG_BUF 0x2c
+#define OMAP_MMC_REG_SDIO 0x34
+#define OMAP_MMC_REG_REV 0x3c
+#define OMAP_MMC_REG_RSP0 0x40
+#define OMAP_MMC_REG_RSP1 0x44
+#define OMAP_MMC_REG_RSP2 0x48
+#define OMAP_MMC_REG_RSP3 0x4c
+#define OMAP_MMC_REG_RSP4 0x50
+#define OMAP_MMC_REG_RSP5 0x54
+#define OMAP_MMC_REG_RSP6 0x58
+#define OMAP_MMC_REG_RSP7 0x5c
+#define OMAP_MMC_REG_IOSR 0x60
+#define OMAP_MMC_REG_SYSC 0x64
+#define OMAP_MMC_REG_SYSS 0x68
+
+#define OMAP_MMC_STAT_CARD_ERR (1 << 14)
+#define OMAP_MMC_STAT_CARD_IRQ (1 << 13)
+#define OMAP_MMC_STAT_OCR_BUSY (1 << 12)
+#define OMAP_MMC_STAT_A_EMPTY (1 << 11)
+#define OMAP_MMC_STAT_A_FULL (1 << 10)
+#define OMAP_MMC_STAT_CMD_CRC (1 << 8)
+#define OMAP_MMC_STAT_CMD_TOUT (1 << 7)
+#define OMAP_MMC_STAT_DATA_CRC (1 << 6)
+#define OMAP_MMC_STAT_DATA_TOUT (1 << 5)
+#define OMAP_MMC_STAT_END_BUSY (1 << 4)
+#define OMAP_MMC_STAT_END_OF_DATA (1 << 3)
+#define OMAP_MMC_STAT_CARD_BUSY (1 << 2)
+#define OMAP_MMC_STAT_END_OF_CMD (1 << 0)
+
+#define OMAP_MMC_READ(base, reg) __raw_readw((base) + OMAP_MMC_REG_##reg)
+#define OMAP_MMC_WRITE(base, reg, val) __raw_writew((val), (base) + OMAP_MMC_REG_##reg)
+
+/*
+ * Command types
+ */
+#define OMAP_MMC_CMDTYPE_BC 0
+#define OMAP_MMC_CMDTYPE_BCR 1
+#define OMAP_MMC_CMDTYPE_AC 2
+#define OMAP_MMC_CMDTYPE_ADTC 3
+
+#endif
On Fri, Feb 24, 2006 at 12:38:24PM -0400, Carlos Aguiar wrote:
> All suggestions and comments are welcome.
Okay, further comments. Almost there!
> +/* PIO only */
> +static void
> +mmc_omap_xfer_data(struct mmc_omap_host *host, int write)
> +{
> + int n;
> + void __iomem *reg;
> + u16 *p;
> +
> + if (host->buffer_bytes_left == 0) {
> + host->sg_idx++;
> + BUG_ON(host->sg_idx == host->sg_len);
> + mmc_omap_sg_to_buf(host);
> + }
> + n = 64;
> + if (n > host->buffer_bytes_left)
> + n = host->buffer_bytes_left;
> + host->buffer_bytes_left -= n;
> + host->total_bytes_left -= n;
> + host->data->bytes_xfered += n;
> +
> + /* Optimize the loop a bit by calculating the register only
> + * once */
> + reg = host->base + OMAP_MMC_REG_DATA;
> + p = host->buffer;
> + n /= 2;
> + if (write) {
> + while (n--)
> + __raw_writew(*p++, reg);
> + } else {
> + while (n-- > 0)
> + *p++ = __raw_readw(reg);
> + }
I thought I made a comment about readsw/writesw being more efficient
versions of these?
> + host->buffer = p;
> +}
> +static irqreturn_t mmc_omap_irq(int irq, void *dev_id, struct pt_regs *regs)
> +{
> + struct mmc_omap_host * host = (struct mmc_omap_host *)dev_id;
> + u16 status;
> + int end_command;
> + int end_transfer;
> + int transfer_error;
> +
> + if (host->cmd == NULL && host->data == NULL) {
> + status = OMAP_MMC_READ(host->base, STAT);
> + printk(KERN_INFO "MMC%d: Spurious interrupt 0x%04x\n",
> + host->id, status);
dev_info(mmc_dev(host->mmc), "spurious irq 0x%04x\n", status);
There's no need to print host->id - mmc_dev(host->mmc) will print the
platform device bus_id, which is generated from the platform device
name and the platform device id.
> + if (status != 0) {
> + OMAP_MMC_WRITE(host->base, STAT, status);
> + OMAP_MMC_WRITE(host->base, IE, 0);
> + }
> + return IRQ_HANDLED;
> + }
> +
> + end_command = 0;
> + end_transfer = 0;
> + transfer_error = 0;
> +
> + while ((status = OMAP_MMC_READ(host->base, STAT)) != 0) {
> + OMAP_MMC_WRITE(host->base, STAT, status);
> +#ifdef CONFIG_MMC_DEBUG
> + printk(KERN_DEBUG "MMC IRQ %04x (CMD %d): ", status,
> + host->cmd != NULL ? host->cmd->opcode : -1);
dev_dbg(mmc_dev(host->mmc), "MMC IRQ %04x (CMD %d): ",
status, host->cmd != NULL ? host->cmd->opcode : -1);
> + mmc_omap_report_irq(status);
> + printk("\n");
> +#endif
> + if (host->total_bytes_left) {
> + if ((status & OMAP_MMC_STAT_A_FULL) ||
> + (status & OMAP_MMC_STAT_END_OF_DATA))
> + mmc_omap_xfer_data(host, 0);
> + if (status & OMAP_MMC_STAT_A_EMPTY)
> + mmc_omap_xfer_data(host, 1);
> + }
> +
> + if (status & OMAP_MMC_STAT_END_OF_DATA) {
> + end_transfer = 1;
> + }
> +
> + if (status & OMAP_MMC_STAT_DATA_TOUT) {
> + dev_dbg(mmc_dev(host->mmc), "MMC%d: Data timeout\n",
> + host->id);
dev_dbg(mmc_dev(host->mmc), "data timeout\n");
> + if (host->data) {
> + host->data->error |= MMC_ERR_TIMEOUT;
> + transfer_error = 1;
> + }
> + }
> +
> + if (status & OMAP_MMC_STAT_DATA_CRC) {
> + if (host->data) {
> + host->data->error |= MMC_ERR_BADCRC;
> + dev_dbg(mmc_dev(host->mmc), "MMC%d: Data CRC
> + error, bytes left %d\n",
> + host->id,
> + host->total_bytes_left);
dev_dbg(mmc_dev(host->mmc),
"data CRC error, bytes left %d\n",
host->total_bytes_left);
> + transfer_error = 1;
> + } else {
> + dev_dbg(mmc_dev(host->mmc), "MMC%d: Data CRC
> + error\n", host->id);
dev_dbg(mmc_dev(host->mmc), "data CRC error\n");
> + }
> + }
> +
> + if (status & OMAP_MMC_STAT_CMD_TOUT) {
> + /* Timeouts are routine with some commands */
> + if (host->cmd) {
> + if (host->cmd->opcode != MMC_ALL_SEND_CID &&
> + host->cmd->opcode !=
> + MMC_SEND_OP_COND &&
> + host->cmd->opcode !=
> + MMC_APP_CMD &&
> + !mmc_omap_cover_is_open(host))
> + dev_err(mmc_dev(host->mmc), "MMC%d:
> + Command timeout,
> + CMD%d\n", host->id,
> + host->cmd->opcode);
dev_err(mmc_dev(host->mmc),
"command timeout, CMD %d\n",
host->cmd->opcode);
> + host->cmd->error = MMC_ERR_TIMEOUT;
> + end_command = 1;
> + }
> + }
> +
> + if (status & OMAP_MMC_STAT_CMD_CRC) {
> + if (host->cmd) {
> + dev_err(mmc_dev(host->mmc), "MMC%d: Command CRC
> + error (CMD%d, arg 0x%08x)\n",
> + host->id, host->cmd->opcode,
> + host->cmd->arg);
dev_err(mmc_dev(host->mmc),
"command CRC error (CMD%d, arg 0x%08x)\n",
host->cmd->opcode, host->cmd->arg);
> + host->cmd->error = MMC_ERR_BADCRC;
> + end_command = 1;
> + } else
> + dev_err(mmc_dev(host->mmc), "MMC%d: Command CRC
> + error without cmd?\n",
> + host->id);
dev_err(mmc_dev(host->mmc),
"command CRC error without cmd?\n");
> + }
> +
> + if (status & OMAP_MMC_STAT_CARD_ERR) {
> + if (host->cmd && host->cmd->opcode == MMC_STOP_TRANSMISSION) {
> + u32 response = OMAP_MMC_READ(host->base, RSP6)
> + | (OMAP_MMC_READ(host->base, RSP7) << 16);
> + /* STOP sometimes sets must-ignore bits */
> + if (!(response & (R1_CC_ERROR
> + | R1_ILLEGAL_COMMAND
> + | R1_COM_CRC_ERROR))) {
> + end_command = 1;
> + continue;
> + }
> + }
> +
> + dev_dbg(mmc_dev(host->mmc), "MMC%d: Card status error (CMD%d)\n",
> + host->id, host->cmd->opcode);
dev_dbg(mmc_dev(host->mmc), "card status error (CMD%d)\n",
host->cmd->opcode);
> + if (host->cmd) {
> + host->cmd->error = MMC_ERR_FAILED;
> + end_command = 1;
> + }
> + if (host->data) {
> + host->data->error = MMC_ERR_FAILED;
> + transfer_error = 1;
> + }
> + }
> +
> + /*
> + * NOTE: On 1610 the END_OF_CMD may come too early when
> + * starting a write
> + */
> + if ((status & OMAP_MMC_STAT_END_OF_CMD) &&
> + (!(status & OMAP_MMC_STAT_A_EMPTY))) {
> + end_command = 1;
> + }
> + }
> +
> + if (end_command) {
> + mmc_omap_cmd_done(host, host->cmd);
> + }
> + if (transfer_error)
> + mmc_omap_xfer_done(host, host->data);
> + else if (end_transfer)
> + mmc_omap_end_of_data(host, host->data);
> +
> + return IRQ_HANDLED;
> +}
Same comments for the other dev_* and printk's.
> +static int __init mmc_omap_probe(struct platform_device *pdev)
> +{
> + struct omap_mmc_conf *minfo = pdev->dev.platform_data;
> + struct mmc_host *mmc;
> + struct mmc_omap_host *host = NULL;
> + int ret = 0;
> +
> + if (platform_get_resource(pdev, IORESOURCE_MEM, 0) ||
> + platform_get_irq(pdev, IORESOURCE_IRQ, 0)) {
> + dev_err(&pdev->dev, "mmc_omap_probe: invalid resource type\n");
> + return -ENODEV;
> + }
> +
> + if (!request_mem_region(pdev->resource[0].start,
> + pdev->resource[0].end - pdev->resource[0].start + 1,
> + pdev->name)) {
> + dev_dbg(&pdev->dev, "request_mem_region failed\n");
> + return -EBUSY;
> + }
> +
> + mmc = mmc_alloc_host(sizeof(struct mmc_omap_host), &pdev->dev);
> + if (!mmc) {
> + ret = -ENOMEM;
> + goto out;
> + }
> +
> + host = mmc_priv(mmc);
> + host->mmc = mmc;
> +
> + spin_lock_init(&host->dma_lock);
> + init_timer(&host->dma_timer);
> + host->dma_timer.function = mmc_omap_dma_timer;
> + host->dma_timer.data = (unsigned long) host;
> +
> + host->id = pdev->id;
> +
> + if (cpu_is_omap24xx()) {
> + host->iclk = clk_get(&pdev->dev, "mmc_ick");
> + if (IS_ERR(host->iclk))
> + goto out;
> + clk_enable(host->iclk);
> + }
> +
> + if (!cpu_is_omap24xx())
> + host->fclk = clk_get(&pdev->dev, "mmc_ck");
> + else
> + host->fclk = clk_get(&pdev->dev, "mmc_fck");
> +
> + if (IS_ERR(host->fclk)) {
> + ret = PTR_ERR(host->fclk);
> + goto out;
> + }
> +
> + /* REVISIT:
> + * Also, use minfo->cover to decide how to manage
> + * the card detect sensing.
> + */
> + host->power_pin = minfo->power_pin;
> + host->switch_pin = minfo->switch_pin;
> + host->wp_pin = minfo->wp_pin;
> + host->use_dma = 1;
> + host->dma_ch = -1;
> +
> + host->irq = pdev->resource[1].start;
> + host->base = ioremap(pdev->res.start, SZ_4K);
What if ioremap fails with NULL?
> +
> + if (minfo->wire4)
> + mmc->caps |= MMC_CAP_4_BIT_DATA;
> +
> + mmc->ops = &mmc_omap_ops;
> + mmc->f_min = 400000;
> + mmc->f_max = 24000000;
> + mmc->ocr_avail = MMC_VDD_33_34;
Some cards want at least two bits set - use MMC_VDD_32_33|MMC_VDD_33_34
here please.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
Hi Russel and folks,
This patch has the following corrections:
- In function mmc_omap_probe(), some cards want at least two bits set,
so was used MMC_VDD_32_33|MMC_VDD_33_34 to set mmc->ocr_avail.
- In omap.c, there's no need to print host->id - mmc_dev(host->mmc) will
print the platform device bus_id, which is generated from the platform device
name and the platform device id. Same change for the other dev_err, dev_dbg,
dev_warn, dev_info and printk's.
It' s simple because I' m outside office and returning this weekend.
The final patch with the whole corrections I' ll send on Mon (Mar,
06).
BR,
Carlos Aguiar
Instituto Nokia de Tecnologia
Adds OMAP MMC driver.
Signed-off-by: Juha Yrj?l? <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
Signed-off-by: Carlos Aguiar <[email protected]>
Index: linux-2.6.16-rc5-git7/drivers/mmc/Kconfig
===================================================================
--- linux-2.6.16-rc5-git7.orig/drivers/mmc/Kconfig 2006-03-03
08:19:15.000000000 -0400
+++ linux-2.6.16-rc5-git7/drivers/mmc/Kconfig 2006-03-03
08:20:33.000000000 -0400
@@ -49,6 +49,17 @@ config MMC_PXA
If unsure, say N.
+config MMC_OMAP
+ tristate "TI OMAP Multimedia Card Interface support"
+ depends on ARCH_OMAP && MMC
+ select TPS65010 if MACH_OMAP_H2
+ help
+ This selects the TI OMAP Multimedia card Interface.
+ If you have an OMAP board with a Multimedia Card slot,
+ say Y or M here.
+
+ If unsure, say N.
+
config MMC_WBSD
tristate "Winbond W83L51xD SD/MMC Card Interface support"
depends on MMC && ISA_DMA_API
Index: linux-2.6.16-rc5-git7/drivers/mmc/Makefile
===================================================================
--- linux-2.6.16-rc5-git7.orig/drivers/mmc/Makefile 2006-03-03
08:19:15.000000000 -0400
+++ linux-2.6.16-rc5-git7/drivers/mmc/Makefile 2006-03-03
08:20:33.000000000 -0400
@@ -19,5 +19,6 @@ obj-$(CONFIG_MMC_ARMMMCI) += mmci.o
obj-$(CONFIG_MMC_PXA) += pxamci.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
+obj-$(CONFIG_MMC_OMAP) += omap.o
mmc_core-y := mmc.o mmc_queue.o mmc_sysfs.o
Index: linux-2.6.16-rc5-git7/drivers/mmc/omap.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.16-rc5-git7/drivers/mmc/omap.c 2006-03-03
08:36:17.000000000 -0400
@@ -0,0 +1,1235 @@
+/*
+ * linux/drivers/media/mmc/omap.c
+ *
+ * Copyright (C) 2004 Nokia Corporation
+ * Written by Tuukka Tikkanen and Juha Yrj?l?<[email protected]>
+ * Misc hacks here and there by Tony Lindgren <[email protected]>
+ * Other hacks (DMA, SD, etc) by David Brownell
+ *
+ * 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/config.h>
+
+#ifdef CONFIG_MMC_DEBUG
+#define DEBUG /* for dev_dbg(), pr_debug(), etc */
+#endif
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/protocol.h>
+#include <linux/mmc/card.h>
+#include <linux/clk.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/scatterlist.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/board.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/fpga.h>
+#include <asm/arch/tps65010.h>
+
+#include "omap.h"
+
+#define DRIVER_NAME "mmci-omap"
+#define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE))
+
+/* Specifies how often in millisecs to poll for card status changes
+ * when the cover switch is open */
+#define OMAP_MMC_SWITCH_POLL_DELAY 500
+
+static int mmc_omap_enable_poll = 1;
+
+struct mmc_omap_host {
+ int initialized;
+ int suspended;
+ struct mmc_request * mrq;
+ struct mmc_command * cmd;
+ struct mmc_data * data;
+ struct mmc_host * mmc;
+ struct device * dev;
+ unsigned char id; /* 16xx chips have 2 MMC blocks */
+ struct clk * iclk;
+ struct clk * fclk;
+ void __iomem *base;
+ int irq;
+ unsigned char bus_mode;
+ unsigned char hw_bus_mode;
+
+ unsigned int sg_len;
+ int sg_idx;
+ u16 * buffer;
+ u32 buffer_bytes_left;
+ u32 total_bytes_left;
+
+ unsigned use_dma:1;
+ unsigned brs_received:1, dma_done:1;
+ unsigned dma_is_read:1;
+ unsigned dma_in_use:1;
+ int dma_ch;
+ spinlock_t dma_lock;
+ struct timer_list dma_timer;
+ unsigned dma_len;
+
+ short power_pin;
+ short wp_pin;
+
+ int switch_pin;
+ struct work_struct switch_work;
+ struct timer_list switch_timer;
+ int switch_last_state;
+};
+
+static inline int
+mmc_omap_cover_is_open(struct mmc_omap_host *host)
+{
+ if (host->switch_pin < 0)
+ return 0;
+ return omap_get_gpio_datain(host->switch_pin);
+}
+
+static ssize_t
+mmc_omap_show_cover_switch(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mmc_omap_host *host = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", mmc_omap_cover_is_open(host) ? "open" :
+ "closed");
+}
+
+static DEVICE_ATTR(cover_switch, S_IRUGO, mmc_omap_show_cover_switch, NULL);
+
+static ssize_t
+mmc_omap_show_enable_poll(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", mmc_omap_enable_poll);
+}
+
+static ssize_t
+mmc_omap_store_enable_poll(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ int enable_poll;
+
+ if (sscanf(buf, "%10d", &enable_poll) != 1)
+ return -EINVAL;
+
+ if (enable_poll != mmc_omap_enable_poll) {
+ struct mmc_omap_host *host = dev_get_drvdata(dev);
+
+ mmc_omap_enable_poll = enable_poll;
+ if (enable_poll && host->switch_pin >= 0)
+ schedule_work(&host->switch_work);
+ }
+ return size;
+}
+
+static DEVICE_ATTR(enable_poll, 0664,
+ mmc_omap_show_enable_poll, mmc_omap_store_enable_poll);
+
+static void
+mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
+{
+ u32 cmdreg;
+ u32 resptype;
+ u32 cmdtype;
+
+ host->cmd = cmd;
+
+ resptype = 0;
+ cmdtype = 0;
+
+ /* Our hardware needs to know exact type */
+ switch (RSP_TYPE(mmc_resp_type(cmd))) {
+ case RSP_TYPE(MMC_RSP_R1):
+ /* resp 1, resp 1b */
+ resptype = 1;
+ break;
+ case RSP_TYPE(MMC_RSP_R2):
+ resptype = 2;
+ break;
+ case RSP_TYPE(MMC_RSP_R3):
+ resptype = 3;
+ break;
+ default:
+ break;
+ }
+
+ if (mmc_cmd_type(cmd) == MMC_CMD_ADTC) {
+ cmdtype = OMAP_MMC_CMDTYPE_ADTC;
+ } else if (mmc_cmd_type(cmd) == MMC_CMD_BC) {
+ cmdtype = OMAP_MMC_CMDTYPE_BC;
+ } else if (mmc_cmd_type(cmd) == MMC_CMD_BCR) {
+ cmdtype = OMAP_MMC_CMDTYPE_BCR;
+ } else {
+ cmdtype = OMAP_MMC_CMDTYPE_AC;
+ }
+
+ cmdreg = cmd->opcode | (resptype << 8) | (cmdtype << 12);
+
+ if (host->bus_mode == MMC_BUSMODE_OPENDRAIN)
+ cmdreg |= 1 << 6;
+
+ if (cmd->flags & MMC_RSP_BUSY)
+ cmdreg |= 1 << 11;
+
+ if (host->data && !(host->data->flags & MMC_DATA_WRITE))
+ cmdreg |= 1 << 15;
+
+ clk_enable(host->fclk);
+
+ OMAP_MMC_WRITE(host->base, CTO, 200);
+ OMAP_MMC_WRITE(host->base, ARGL, cmd->arg & 0xffff);
+ OMAP_MMC_WRITE(host->base, ARGH, cmd->arg >> 16);
+ OMAP_MMC_WRITE(host->base, IE,
+ OMAP_MMC_STAT_A_EMPTY | OMAP_MMC_STAT_A_FULL |
+ OMAP_MMC_STAT_CMD_CRC | OMAP_MMC_STAT_CMD_TOUT |
+ OMAP_MMC_STAT_DATA_CRC | OMAP_MMC_STAT_DATA_TOUT |
+ OMAP_MMC_STAT_END_OF_CMD | OMAP_MMC_STAT_CARD_ERR |
+ OMAP_MMC_STAT_END_OF_DATA);
+ OMAP_MMC_WRITE(host->base, CMD, cmdreg);
+}
+
+static void
+mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ if (host->dma_in_use) {
+ enum dma_data_direction dma_data_dir;
+
+ BUG_ON(host->dma_ch < 0);
+ if (data->error != MMC_ERR_NONE)
+ omap_stop_dma(host->dma_ch);
+ /* Release DMA channel lazily */
+ mod_timer(&host->dma_timer, jiffies + HZ);
+ if (data->flags & MMC_DATA_WRITE)
+ dma_data_dir = DMA_TO_DEVICE;
+ else
+ dma_data_dir = DMA_FROM_DEVICE;
+ dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
+ dma_data_dir);
+ }
+ host->data = NULL;
+ host->sg_len = 0;
+ clk_disable(host->fclk);
+
+ /* NOTE: MMC layer will sometimes poll-wait CMD13 next, issuing
+ * dozens of requests until the card finishes writing data.
+ * It'd be cheaper to just wait till an EOFB interrupt arrives...
+ */
+
+ if (!data->stop) {
+ host->mrq = NULL;
+ mmc_request_done(host->mmc, data->mrq);
+ return;
+ }
+
+ mmc_omap_start_command(host, data->stop);
+}
+
+static void
+mmc_omap_end_of_data(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ unsigned long flags;
+ int done;
+
+ if (!host->dma_in_use) {
+ mmc_omap_xfer_done(host, data);
+ return;
+ }
+ done = 0;
+ spin_lock_irqsave(&host->dma_lock, flags);
+ if (host->dma_done)
+ done = 1;
+ else
+ host->brs_received = 1;
+ spin_unlock_irqrestore(&host->dma_lock, flags);
+ if (done)
+ mmc_omap_xfer_done(host, data);
+}
+
+static void
+mmc_omap_dma_timer(unsigned long data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+
+ BUG_ON(host->dma_ch < 0);
+ omap_free_dma(host->dma_ch);
+ host->dma_ch = -1;
+}
+
+static void
+mmc_omap_dma_done(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ unsigned long flags;
+ int done;
+
+ done = 0;
+ spin_lock_irqsave(&host->dma_lock, flags);
+ if (host->brs_received)
+ done = 1;
+ else
+ host->dma_done = 1;
+ spin_unlock_irqrestore(&host->dma_lock, flags);
+ if (done)
+ mmc_omap_xfer_done(host, data);
+}
+
+static void
+mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
+{
+ host->cmd = NULL;
+
+ if (cmd->flags & MMC_RSP_PRESENT) {
+ if (cmd->flags & MMC_RSP_136) {
+ /* response type 2 */
+ cmd->resp[3] =
+ OMAP_MMC_READ(host->base, RSP0) |
+ (OMAP_MMC_READ(host->base, RSP1) << 16);
+ cmd->resp[2] =
+ OMAP_MMC_READ(host->base, RSP2) |
+ (OMAP_MMC_READ(host->base, RSP3) << 16);
+ cmd->resp[1] =
+ OMAP_MMC_READ(host->base, RSP4) |
+ (OMAP_MMC_READ(host->base, RSP5) << 16);
+ cmd->resp[0] =
+ OMAP_MMC_READ(host->base, RSP6) |
+ (OMAP_MMC_READ(host->base, RSP7) << 16);
+ } else {
+ /* response types 1, 1b, 3, 4, 5, 6 */
+ cmd->resp[0] =
+ OMAP_MMC_READ(host->base, RSP6) |
+ (OMAP_MMC_READ(host->base, RSP7) << 16);
+ }
+ }
+
+ if (host->data == NULL || cmd->error != MMC_ERR_NONE) {
+ host->mrq = NULL;
+ clk_disable(host->fclk);
+ mmc_request_done(host->mmc, cmd->mrq);
+ }
+}
+
+/* PIO only */
+static void
+mmc_omap_sg_to_buf(struct mmc_omap_host *host)
+{
+ struct scatterlist *sg;
+
+ sg = host->data->sg + host->sg_idx;
+ host->buffer_bytes_left = sg->length;
+ host->buffer = page_address(sg->page) + sg->offset;
+ if (host->buffer_bytes_left > host->total_bytes_left)
+ host->buffer_bytes_left = host->total_bytes_left;
+}
+
+/* PIO only */
+static void
+mmc_omap_xfer_data(struct mmc_omap_host *host, int write)
+{
+ int n;
+ void __iomem *reg;
+ u16 *p;
+
+ if (host->buffer_bytes_left == 0) {
+ host->sg_idx++;
+ BUG_ON(host->sg_idx == host->sg_len);
+ mmc_omap_sg_to_buf(host);
+ }
+ n = 64;
+ if (n > host->buffer_bytes_left)
+ n = host->buffer_bytes_left;
+ host->buffer_bytes_left -= n;
+ host->total_bytes_left -= n;
+ host->data->bytes_xfered += n;
+
+ /* Optimize the loop a bit by calculating the register only
+ * once */
+ reg = host->base + OMAP_MMC_REG_DATA;
+ p = host->buffer;
+ n /= 2;
+ if (write) {
+ while (n--)
+ __raw_writew(*p++, reg);
+ } else {
+ while (n-- > 0)
+ *p++ = __raw_readw(reg);
+ }
+ host->buffer = p;
+}
+
+static inline void mmc_omap_report_irq(u16 status)
+{
+ static const char *mmc_omap_status_bits[] = {
+ "EOC", "CD", "CB", "BRS", "EOFB", "DTO", "DCRC", "CTO",
+ "CCRC", "CRW", "AF", "AE", "OCRB", "CIRQ", "CERR"
+ };
+ int i, c = 0;
+
+ for (i = 0; i < ARRAY_SIZE(mmc_omap_status_bits); i++)
+ if (status & (1 << i)) {
+ if (c)
+ printk(" ");
+ printk("%s", mmc_omap_status_bits[i]);
+ c++;
+ }
+}
+
+static irqreturn_t mmc_omap_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct mmc_omap_host * host = (struct mmc_omap_host *)dev_id;
+ u16 status;
+ int end_command;
+ int end_transfer;
+ int transfer_error;
+
+ if (host->cmd == NULL && host->data == NULL) {
+ status = OMAP_MMC_READ(host->base, STAT);
+ dev_info(mmc_dev(host->mmc),"spurious irq 0x%04x\n", status);
+ if (status != 0) {
+ OMAP_MMC_WRITE(host->base, STAT, status);
+ OMAP_MMC_WRITE(host->base, IE, 0);
+ }
+ return IRQ_HANDLED;
+ }
+
+ end_command = 0;
+ end_transfer = 0;
+ transfer_error = 0;
+
+ while ((status = OMAP_MMC_READ(host->base, STAT)) != 0) {
+ OMAP_MMC_WRITE(host->base, STAT, status);
+#ifdef CONFIG_MMC_DEBUG
+ dev_dbg(mmc_dev(host->mmc), "MMC IRQ %04x (CMD %d): ",
+ status, host->cmd != NULL ? host->cmd->opcode : -1);
+ mmc_omap_report_irq(status);
+ printk("\n");
+#endif
+ if (host->total_bytes_left) {
+ if ((status & OMAP_MMC_STAT_A_FULL) ||
+ (status & OMAP_MMC_STAT_END_OF_DATA))
+ mmc_omap_xfer_data(host, 0);
+ if (status & OMAP_MMC_STAT_A_EMPTY)
+ mmc_omap_xfer_data(host, 1);
+ }
+
+ if (status & OMAP_MMC_STAT_END_OF_DATA) {
+ end_transfer = 1;
+ }
+
+ if (status & OMAP_MMC_STAT_DATA_TOUT) {
+ dev_dbg(mmc_dev(host->mmc), "data timeout\n");
+ if (host->data) {
+ host->data->error |= MMC_ERR_TIMEOUT;
+ transfer_error = 1;
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_DATA_CRC) {
+ if (host->data) {
+ host->data->error |= MMC_ERR_BADCRC;
+ dev_dbg(mmc_dev(host->mmc),
+ "data CRC error, bytes left %d\n",
+ host->total_bytes_left);
+ transfer_error = 1;
+ } else {
+ dev_dbg(mmc_dev(host->mmc), "data CRC error\n");
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_CMD_TOUT) {
+ /* Timeouts are routine with some commands */
+ if (host->cmd) {
+ if (host->cmd->opcode != MMC_ALL_SEND_CID &&
+ host->cmd->opcode !=
+ MMC_SEND_OP_COND &&
+ host->cmd->opcode !=
+ MMC_APP_CMD &&
+ !mmc_omap_cover_is_open(host))
+ dev_err(mmc_dev(host->mmc),
+ "command timeout, CMD %d\n",
+ host->cmd->opcode);
+ host->cmd->error = MMC_ERR_TIMEOUT;
+ end_command = 1;
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_CMD_CRC) {
+ if (host->cmd) {
+ dev_err(mmc_dev(host->mmc),
+ "command CRC error (CMD%d, arg 0x%08x)\n",
+ host->cmd->opcode, host->cmd->arg);
+ host->cmd->error = MMC_ERR_BADCRC;
+ end_command = 1;
+ } else
+ dev_err(mmc_dev(host->mmc),
+ "command CRC error without cmd?\n");
+ }
+
+ if (status & OMAP_MMC_STAT_CARD_ERR) {
+ if (host->cmd && host->cmd->opcode == MMC_STOP_TRANSMISSION) {
+ u32 response = OMAP_MMC_READ(host->base, RSP6)
+ | (OMAP_MMC_READ(host->base, RSP7) << 16);
+ /* STOP sometimes sets must-ignore bits */
+ if (!(response & (R1_CC_ERROR
+ | R1_ILLEGAL_COMMAND
+ | R1_COM_CRC_ERROR))) {
+ end_command = 1;
+ continue;
+ }
+ }
+
+ dev_dbg(mmc_dev(host->mmc), "card status error (CMD%d)\n",
+ host->cmd->opcode);
+ if (host->cmd) {
+ host->cmd->error = MMC_ERR_FAILED;
+ end_command = 1;
+ }
+ if (host->data) {
+ host->data->error = MMC_ERR_FAILED;
+ transfer_error = 1;
+ }
+ }
+
+ /*
+ * NOTE: On 1610 the END_OF_CMD may come too early when
+ * starting a write
+ */
+ if ((status & OMAP_MMC_STAT_END_OF_CMD) &&
+ (!(status & OMAP_MMC_STAT_A_EMPTY))) {
+ end_command = 1;
+ }
+ }
+
+ if (end_command) {
+ mmc_omap_cmd_done(host, host->cmd);
+ }
+ if (transfer_error)
+ mmc_omap_xfer_done(host, host->data);
+ else if (end_transfer)
+ mmc_omap_end_of_data(host, host->data);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mmc_omap_switch_irq(int irq, void *dev_id, struct
pt_regs *regs)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) dev_id;
+
+ schedule_work(&host->switch_work);
+
+ return IRQ_HANDLED;
+}
+
+static void mmc_omap_switch_timer(unsigned long arg)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) arg;
+
+ schedule_work(&host->switch_work);
+}
+
+/* FIXME: Handle card insertion and removal properly. Maybe use a mask
+ * for MMC state? */
+static void mmc_omap_switch_callback(unsigned long data, u8 mmc_mask)
+{
+}
+
+static void mmc_omap_switch_handler(void *data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+ struct mmc_card *card;
+ static int complained = 0;
+ int cards = 0, cover_open;
+
+ if (host->switch_pin == -1)
+ return;
+ cover_open = mmc_omap_cover_is_open(host);
+ if (cover_open != host->switch_last_state) {
+ kobject_uevent(&host->dev->kobj, KOBJ_CHANGE);
+ host->switch_last_state = cover_open;
+ }
+ mmc_detect_change(host->mmc, 0);
+ list_for_each_entry(card, &host->mmc->cards, node) {
+ if (mmc_card_present(card))
+ cards++;
+ }
+ if (mmc_omap_cover_is_open(host)) {
+ if (!complained) {
+ dev_info(mmc_dev(host->mmc), "cover is open");
+ complained = 1;
+ }
+ if (mmc_omap_enable_poll)
+ mod_timer(&host->switch_timer, jiffies +
+ msecs_to_jiffies(OMAP_MMC_SWITCH_POLL_DELAY));
+ } else {
+ complained = 0;
+ }
+}
+
+/* Prepare to transfer the next segment of a scatterlist */
+static void
+mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ int dma_ch = host->dma_ch;
+ unsigned long data_addr;
+ u16 buf, frame;
+ u32 count;
+ struct scatterlist *sg = &data->sg[host->sg_idx];
+ int src_port = 0;
+ int dst_port = 0;
+ int sync_dev = 0;
+
+ data_addr = io_v2p((u32) host->base) + OMAP_MMC_REG_DATA;
+ frame = 1 << data->blksz_bits;
+ count = sg_dma_len(sg);
+
+ if ((data->blocks == 1) && (count > (1 << data->blksz_bits)))
+ count = frame;
+
+ host->dma_len = count;
+
+ /* FIFO is 16x2 bytes on 15xx, and 32x2 bytes on 16xx and 24xx.
+ * Use 16 or 32 word frames when the blocksize is at least that large.
+ * Blocksize is usually 512 bytes; but not for some SD reads.
+ */
+ if (cpu_is_omap15xx() && frame > 32)
+ frame = 32;
+ else if (frame > 64)
+ frame = 64;
+ count /= frame;
+ frame >>= 1;
+
+ if (!(data->flags & MMC_DATA_WRITE)) {
+ buf = 0x800f | ((frame - 1) << 8);
+
+ if (cpu_class_is_omap1()) {
+ src_port = OMAP_DMA_PORT_TIPB;
+ dst_port = OMAP_DMA_PORT_EMIFF;
+ }
+ if (cpu_is_omap24xx())
+ sync_dev = OMAP24XX_DMA_MMC1_RX;
+
+ omap_set_dma_src_params(dma_ch, src_port,
+ OMAP_DMA_AMODE_CONSTANT,
+ data_addr, 0, 0);
+ omap_set_dma_dest_params(dma_ch, dst_port,
+ OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sg), 0, 0);
+ omap_set_dma_dest_data_pack(dma_ch, 1);
+ omap_set_dma_dest_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
+ } else {
+ buf = 0x0f80 | ((frame - 1) << 0);
+
+ if (cpu_class_is_omap1()) {
+ src_port = OMAP_DMA_PORT_EMIFF;
+ dst_port = OMAP_DMA_PORT_TIPB;
+ }
+ if (cpu_is_omap24xx())
+ sync_dev = OMAP24XX_DMA_MMC1_TX;
+
+ omap_set_dma_dest_params(dma_ch, dst_port,
+ OMAP_DMA_AMODE_CONSTANT,
+ data_addr, 0, 0);
+ omap_set_dma_src_params(dma_ch, src_port,
+ OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sg), 0, 0);
+ omap_set_dma_src_data_pack(dma_ch, 1);
+ omap_set_dma_src_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
+ }
+
+ /* Max limit for DMA frame count is 0xffff */
+ if (unlikely(count > 0xffff))
+ BUG();
+
+ OMAP_MMC_WRITE(host->base, BUF, buf);
+ omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S16,
+ frame, count, OMAP_DMA_SYNC_FRAME,
+ sync_dev, 0);
+}
+
+/* A scatterlist segment completed */
+static void mmc_omap_dma_cb(int lch, u16 ch_status, void *data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+ struct mmc_data *mmcdat = host->data;
+
+ if (unlikely(host->dma_ch < 0)) {
+ dev_err(mmc_dev(host->mmc), "DMA callback while DMA not
+ enabled\n");
+ return;
+ }
+ /* FIXME: We really should do something to _handle_ the errors */
+ if (ch_status & OMAP_DMA_TOUT_IRQ) {
+ dev_err(mmc_dev(host->mmc),"DMA timeout\n");
+ return;
+ }
+ if (ch_status & OMAP_DMA_DROP_IRQ) {
+ dev_err(mmc_dev(host->mmc), "DMA sync error\n");
+ return;
+ }
+ if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
+ return;
+ }
+ mmcdat->bytes_xfered += host->dma_len;
+ host->sg_idx++;
+ if (host->sg_idx < host->sg_len) {
+ mmc_omap_prepare_dma(host, host->data);
+ omap_start_dma(host->dma_ch);
+ } else
+ mmc_omap_dma_done(host, host->data);
+}
+
+static int mmc_omap_get_dma_channel(struct mmc_omap_host *host,
struct mmc_data *data)
+{
+ const char *dev_name;
+ int sync_dev, dma_ch, is_read, r;
+
+ is_read = !(data->flags & MMC_DATA_WRITE);
+ del_timer_sync(&host->dma_timer);
+ if (host->dma_ch >= 0) {
+ if (is_read == host->dma_is_read)
+ return 0;
+ omap_free_dma(host->dma_ch);
+ host->dma_ch = -1;
+ }
+
+ if (is_read) {
+ if (host->id == 1) {
+ sync_dev = OMAP_DMA_MMC_RX;
+ dev_name = "MMC1 read";
+ } else {
+ sync_dev = OMAP_DMA_MMC2_RX;
+ dev_name = "MMC2 read";
+ }
+ } else {
+ if (host->id == 1) {
+ sync_dev = OMAP_DMA_MMC_TX;
+ dev_name = "MMC1 write";
+ } else {
+ sync_dev = OMAP_DMA_MMC2_TX;
+ dev_name = "MMC2 write";
+ }
+ }
+ r = omap_request_dma(sync_dev, dev_name, mmc_omap_dma_cb,
+ host, &dma_ch);
+ if (r != 0) {
+ dev_dbg(mmc_dev(host->mmc), "omap_request_dma() failed with %d\n", r);
+ return r;
+ }
+ host->dma_ch = dma_ch;
+ host->dma_is_read = is_read;
+
+ return 0;
+}
+
+static inline void set_cmd_timeout(struct mmc_omap_host *host,
struct mmc_request *req)
+{
+ u16 reg;
+
+ reg = OMAP_MMC_READ(host->base, SDIO);
+ reg &= ~(1 << 5);
+ OMAP_MMC_WRITE(host->base, SDIO, reg);
+ /* Set maximum timeout */
+ OMAP_MMC_WRITE(host->base, CTO, 0xff);
+}
+
+static inline void set_data_timeout(struct mmc_omap_host *host,
struct mmc_request *req)
+{
+ int timeout;
+ u16 reg;
+
+ /* Convert ns to clock cycles by assuming 20MHz frequency
+ * 1 cycle at 20MHz = 500 ns
+ */
+ timeout = req->data->timeout_clks + req->data->timeout_ns / 500;
+
+ /* Check if we need to use timeout multiplier register */
+ reg = OMAP_MMC_READ(host->base, SDIO);
+ if (timeout > 0xffff) {
+ reg |= (1 << 5);
+ timeout /= 1024;
+ } else
+ reg &= ~(1 << 5);
+ OMAP_MMC_WRITE(host->base, SDIO, reg);
+ OMAP_MMC_WRITE(host->base, DTO, timeout);
+}
+
+static void
+mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ struct mmc_data *data = req->data;
+ int i, use_dma, block_size;
+ unsigned sg_len;
+
+ host->data = data;
+ if (data == NULL) {
+ OMAP_MMC_WRITE(host->base, BLEN, 0);
+ OMAP_MMC_WRITE(host->base, NBLK, 0);
+ OMAP_MMC_WRITE(host->base, BUF, 0);
+ host->dma_in_use = 0;
+ set_cmd_timeout(host, req);
+ return;
+ }
+
+
+ block_size = 1 << data->blksz_bits;
+
+ OMAP_MMC_WRITE(host->base, NBLK, data->blocks - 1);
+ OMAP_MMC_WRITE(host->base, BLEN, block_size - 1);
+ set_data_timeout(host, req);
+
+ /* cope with calling layer confusion; it issues "single
+ * block" writes using multi-block scatterlists.
+ */
+ sg_len = (data->blocks == 1) ? 1 : data->sg_len;
+
+ /* Only do DMA for entire blocks */
+ use_dma = host->use_dma;
+ if (use_dma) {
+ for (i = 0; i < sg_len; i++) {
+ if ((data->sg[i].length % block_size) != 0) {
+ use_dma = 0;
+ break;
+ }
+ }
+ }
+
+ host->sg_idx = 0;
+ if (use_dma) {
+ if (mmc_omap_get_dma_channel(host, data) == 0) {
+ enum dma_data_direction dma_data_dir;
+
+ if (data->flags & MMC_DATA_WRITE)
+ dma_data_dir = DMA_TO_DEVICE;
+ else
+ dma_data_dir = DMA_FROM_DEVICE;
+
+ host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
+ sg_len, dma_data_dir);
+ host->total_bytes_left = 0;
+ mmc_omap_prepare_dma(host, req->data);
+ host->brs_received = 0;
+ host->dma_done = 0;
+ host->dma_in_use = 1;
+ } else
+ use_dma = 0;
+ }
+
+ /* Revert to PIO? */
+ if (!use_dma) {
+ OMAP_MMC_WRITE(host->base, BUF, 0x1f1f);
+ host->total_bytes_left = data->blocks * block_size;
+ host->sg_len = sg_len;
+ mmc_omap_sg_to_buf(host);
+ host->dma_in_use = 0;
+ }
+}
+
+static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ WARN_ON(host->mrq != NULL);
+
+ host->mrq = req;
+
+ /* only touch fifo AFTER the controller readies it */
+ mmc_omap_prepare_data(host, req);
+ mmc_omap_start_command(host, req->cmd);
+ if (host->dma_in_use)
+ omap_start_dma(host->dma_ch);
+}
+
+static void innovator_fpga_socket_power(int on)
+{
+#if defined(CONFIG_MACH_OMAP_INNOVATOR) && defined(CONFIG_ARCH_OMAP15XX)
+
+ if (on) {
+ fpga_write(fpga_read(OMAP1510_FPGA_POWER) | (1 << 3),
+ OMAP1510_FPGA_POWER);
+ } else {
+ fpga_write(fpga_read(OMAP1510_FPGA_POWER) & ~(1 << 3),
+ OMAP1510_FPGA_POWER);
+ }
+#endif
+}
+
+/*
+ * Turn the socket power on/off. Innovator uses FPGA, most boards
+ * probably use GPIO.
+ */
+static void mmc_omap_power(struct mmc_omap_host *host, int on)
+{
+ if (on) {
+ if (machine_is_omap_innovator())
+ innovator_fpga_socket_power(1);
+ else if (machine_is_omap_h2())
+ tps65010_set_gpio_out_value(GPIO3, HIGH);
+ else if (machine_is_omap_h3())
+ /* GPIO 4 of TPS65010 sends SD_EN signal */
+ tps65010_set_gpio_out_value(GPIO4, HIGH);
+ else if (cpu_is_omap24xx()) {
+ u16 reg = OMAP_MMC_READ(host->base, CON);
+ OMAP_MMC_WRITE(host->base, CON, reg | (1 << 11));
+ } else
+ if (host->power_pin >= 0)
+ omap_set_gpio_dataout(host->power_pin, 1);
+ } else {
+ if (machine_is_omap_innovator())
+ innovator_fpga_socket_power(0);
+ else if (machine_is_omap_h2())
+ tps65010_set_gpio_out_value(GPIO3, LOW);
+ else if (machine_is_omap_h3())
+ tps65010_set_gpio_out_value(GPIO4, LOW);
+ else if (cpu_is_omap24xx()) {
+ u16 reg = OMAP_MMC_READ(host->base, CON);
+ OMAP_MMC_WRITE(host->base, CON, reg & ~(1 << 11));
+ } else
+ if (host->power_pin >= 0)
+ omap_set_gpio_dataout(host->power_pin, 0);
+ }
+}
+
+static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+ int dsor;
+ int realclock, i;
+
+ realclock = ios->clock;
+
+ if (ios->clock == 0)
+ dsor = 0;
+ else {
+ int func_clk_rate = clk_get_rate(host->fclk);
+
+ dsor = func_clk_rate / realclock;
+ if (dsor < 1)
+ dsor = 1;
+
+ if (func_clk_rate / dsor > realclock)
+ dsor++;
+
+ if (dsor > 250)
+ dsor = 250;
+ dsor++;
+
+ if (ios->bus_width == MMC_BUS_WIDTH_4)
+ dsor |= 1 << 15;
+ }
+
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF:
+ mmc_omap_power(host, 0);
+ break;
+ case MMC_POWER_UP:
+ case MMC_POWER_ON:
+ mmc_omap_power(host, 1);
+ dsor |= 1<<11;
+ break;
+ }
+
+ host->bus_mode = ios->bus_mode;
+ host->hw_bus_mode = host->bus_mode;
+
+ clk_enable(host->fclk);
+
+ /* On insanely high arm_per frequencies something sometimes
+ * goes somehow out of sync, and the POW bit is not being set,
+ * which results in the while loop below getting stuck.
+ * Writing to the CON register twice seems to do the trick. */
+ for (i = 0; i < 2; i++)
+ OMAP_MMC_WRITE(host->base, CON, dsor);
+ if (ios->power_mode == MMC_POWER_UP) {
+ /* Send clock cycles, poll completion */
+ OMAP_MMC_WRITE(host->base, IE, 0);
+ OMAP_MMC_WRITE(host->base, STAT, 0xffff);
+ OMAP_MMC_WRITE(host->base, CMD, 1<<7);
+ while (0 == (OMAP_MMC_READ(host->base, STAT) & 1));
+ OMAP_MMC_WRITE(host->base, STAT, 1);
+ }
+ clk_disable(host->fclk);
+}
+
+static int mmc_omap_get_ro(struct mmc_host *mmc)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ return host->wp_pin && omap_get_gpio_datain(host->wp_pin);
+}
+
+static struct mmc_host_ops mmc_omap_ops = {
+ .request = mmc_omap_request,
+ .set_ios = mmc_omap_set_ios,
+ .get_ro = mmc_omap_get_ro,
+};
+
+static int __init mmc_omap_probe(struct platform_device *pdev)
+{
+ struct omap_mmc_conf *minfo = pdev->dev.platform_data;
+ struct mmc_host *mmc;
+ struct mmc_omap_host *host = NULL;
+ int ret = 0;
+
+ if (platform_get_resource(pdev, IORESOURCE_MEM, 0) ||
+ platform_get_irq(pdev, IORESOURCE_IRQ, 0)) {
+ dev_err(&pdev->dev, "mmc_omap_probe: invalid resource type\n");
+ return -ENODEV;
+ }
+
+ if (!request_mem_region(pdev->resource[0].start,
+ pdev->resource[0].end - pdev->resource[0].start + 1,
+ pdev->name)) {
+ dev_dbg(&pdev->dev, "request_mem_region failed\n");
+ return -EBUSY;
+ }
+
+ mmc = mmc_alloc_host(sizeof(struct mmc_omap_host), &pdev->dev);
+ if (!mmc) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ host = mmc_priv(mmc);
+ host->mmc = mmc;
+
+ spin_lock_init(&host->dma_lock);
+ init_timer(&host->dma_timer);
+ host->dma_timer.function = mmc_omap_dma_timer;
+ host->dma_timer.data = (unsigned long) host;
+
+ host->id = pdev->id;
+
+ if (cpu_is_omap24xx()) {
+ host->iclk = clk_get(&pdev->dev, "mmc_ick");
+ if (IS_ERR(host->iclk))
+ goto out;
+ clk_enable(host->iclk);
+ }
+
+ if (!cpu_is_omap24xx())
+ host->fclk = clk_get(&pdev->dev, "mmc_ck");
+ else
+ host->fclk = clk_get(&pdev->dev, "mmc_fck");
+
+ if (IS_ERR(host->fclk)) {
+ ret = PTR_ERR(host->fclk);
+ goto out;
+ }
+
+ /* REVISIT:
+ * Also, use minfo->cover to decide how to manage
+ * the card detect sensing.
+ */
+ host->power_pin = minfo->power_pin;
+ host->switch_pin = minfo->switch_pin;
+ host->wp_pin = minfo->wp_pin;
+ host->use_dma = 1;
+ host->dma_ch = -1;
+
+ host->irq = pdev->resource[1].start;
+ host->base = ioremap(pdev->res.start, SZ_4K);
+
+ if (minfo->wire4)
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
+
+ mmc->ops = &mmc_omap_ops;
+ mmc->f_min = 400000;
+ mmc->f_max = 24000000;
+ mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34;
+
+ /* Use scatterlist DMA to reduce per-transfer costs.
+ * NOTE max_seg_size assumption that small blocks aren't
+ * normally used (except e.g. for reading SD registers).
+ */
+ mmc->max_phys_segs = 32;
+ mmc->max_hw_segs = 32;
+ mmc->max_sectors = 256; /* NBLK max 11-bits, OMAP also limited by DMA */
+ mmc->max_seg_size = mmc->max_sectors * 512;
+
+ if (host->power_pin >= 0) {
+ if ((ret = omap_request_gpio(host->power_pin)) != 0) {
+ dev_err(mmc_dev(host->mmc), "Unable to get GPIO
+ pin for MMC power\n");
+ goto out;
+ }
+ omap_set_gpio_direction(host->power_pin, 0);
+ }
+
+ ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
+ if (ret)
+ goto out;
+
+ host->dev = &pdev->dev;
+ platform_set_drvdata(pdev, host);
+
+ mmc_add_host(mmc);
+
+ if (host->switch_pin >= 0) {
+ INIT_WORK(&host->switch_work, mmc_omap_switch_handler, host);
+ init_timer(&host->switch_timer);
+ host->switch_timer.function = mmc_omap_switch_timer;
+ host->switch_timer.data = (unsigned long) host;
+ if (omap_request_gpio(host->switch_pin) != 0) {
+ dev_warn(mmc_dev(host->mmc), "Unable to get GPIO pin for
MMC cover switch\n");
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+
+ omap_set_gpio_direction(host->switch_pin, 1);
+ ret = request_irq(OMAP_GPIO_IRQ(host->switch_pin),
+ mmc_omap_switch_irq, SA_TRIGGER_RISING, DRIVER_NAME, host);
+ if (ret) {
+ dev_warn(mmc_dev(host->mmc), "Unable to get IRQ for MMC
cover switch\n");
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+ ret = device_create_file(&pdev->dev, &dev_attr_cover_switch);
+ if (ret == 0) {
+ ret = device_create_file(&pdev->dev, &dev_attr_enable_poll);
+ if (ret != 0)
+ device_remove_file(&pdev->dev, &dev_attr_cover_switch);
+ }
+ if (ret) {
+ dev_wan(mmc_dev(host->mmc), "Unable to create sysfs
attributes\n");
+ free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+ if (mmc_omap_enable_poll && mmc_omap_cover_is_open(host))
+ schedule_work(&host->switch_work);
+ }
+
+no_switch:
+ return 0;
+
+out:
+ /* FIXME: Free other resources too. */
+ if (host) {
+ if (host->iclk && !IS_ERR(host->iclk))
+ clk_put(host->iclk);
+ if (host->fclk && !IS_ERR(host->fclk))
+ clk_put(host->fclk);
+ mmc_free_host(host->mmc);
+ }
+ return ret;
+}
+
+static int mmc_omap_remove(struct platform_device *pdev)
+{
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (host) {
+ mmc_remove_host(host->mmc);
+ free_irq(host->irq, host);
+
+ if (host->power_pin >= 0)
+ omap_free_gpio(host->power_pin);
+ if (host->switch_pin >= 0) {
+ device_remove_file(&pdev->dev, &dev_attr_enable_poll);
+ device_remove_file(&pdev->dev, &dev_attr_cover_switch);
+ free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ del_timer_sync(&host->switch_timer);
+ flush_scheduled_work();
+ }
+ if (host->iclk && !IS_ERR(host->iclk))
+ clk_put(host->iclk);
+ if (host->fclk && !IS_ERR(host->fclk))
+ clk_put(host->fclk);
+ mmc_free_host(host->mmc);
+ }
+
+ release_mem_region(pdev->resource[0].start,
+ pdev->resource[0].end - pdev->resource[0].start + 1);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int mmc_omap_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ int ret = 0;
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ if (host && host->suspended)
+ return 0;
+
+ if (host) {
+ ret = mmc_suspend_host(host->mmc, mesg);
+ if (ret == 0)
+ host->suspended = 1;
+ }
+ return ret;
+}
+
+static int mmc_omap_resume(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ if (host && !host->suspended)
+ return 0;
+
+ if (host) {
+ ret = mmc_resume_host(host->mmc);
+ if (ret == 0)
+ host->suspended = 0;
+ }
+
+ return ret;
+}
+#else
+#define mmc_omap_suspend NULL
+#define mmc_omap_resume NULL
+#endif
+
+static struct platform_driver mmc_omap_driver = {
+ .probe = mmc_omap_probe,
+ .remove = mmc_omap_remove,
+ .suspend = mmc_omap_suspend,
+ .resume = mmc_omap_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+static int __init mmc_omap_init(void)
+{
+ return platform_driver_register(&mmc_omap_driver);
+}
+
+static void __exit mmc_omap_exit(void)
+{
+ platform_driver_unregister(&mmc_omap_driver);
+}
+
+module_init(mmc_omap_init);
+module_exit(mmc_omap_exit);
+
+MODULE_DESCRIPTION("OMAP Multimedia Card driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS(DRIVER_NAME);
+MODULE_AUTHOR("Juha Yrj?l?");
Index: linux-2.6.16-rc5-git7/drivers/mmc/omap.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.16-rc5-git7/drivers/mmc/omap.h 2006-03-03
08:20:33.000000000 -0400
@@ -0,0 +1,55 @@
+#ifndef DRIVERS_MEDIA_MMC_OMAP_H
+#define DRIVERS_MEDIA_MMC_OMAP_H
+
+#define OMAP_MMC_REG_CMD 0x00
+#define OMAP_MMC_REG_ARGL 0x04
+#define OMAP_MMC_REG_ARGH 0x08
+#define OMAP_MMC_REG_CON 0x0c
+#define OMAP_MMC_REG_STAT 0x10
+#define OMAP_MMC_REG_IE 0x14
+#define OMAP_MMC_REG_CTO 0x18
+#define OMAP_MMC_REG_DTO 0x1c
+#define OMAP_MMC_REG_DATA 0x20
+#define OMAP_MMC_REG_BLEN 0x24
+#define OMAP_MMC_REG_NBLK 0x28
+#define OMAP_MMC_REG_BUF 0x2c
+#define OMAP_MMC_REG_SDIO 0x34
+#define OMAP_MMC_REG_REV 0x3c
+#define OMAP_MMC_REG_RSP0 0x40
+#define OMAP_MMC_REG_RSP1 0x44
+#define OMAP_MMC_REG_RSP2 0x48
+#define OMAP_MMC_REG_RSP3 0x4c
+#define OMAP_MMC_REG_RSP4 0x50
+#define OMAP_MMC_REG_RSP5 0x54
+#define OMAP_MMC_REG_RSP6 0x58
+#define OMAP_MMC_REG_RSP7 0x5c
+#define OMAP_MMC_REG_IOSR 0x60
+#define OMAP_MMC_REG_SYSC 0x64
+#define OMAP_MMC_REG_SYSS 0x68
+
+#define OMAP_MMC_STAT_CARD_ERR (1 << 14)
+#define OMAP_MMC_STAT_CARD_IRQ (1 << 13)
+#define OMAP_MMC_STAT_OCR_BUSY (1 << 12)
+#define OMAP_MMC_STAT_A_EMPTY (1 << 11)
+#define OMAP_MMC_STAT_A_FULL (1 << 10)
+#define OMAP_MMC_STAT_CMD_CRC (1 << 8)
+#define OMAP_MMC_STAT_CMD_TOUT (1 << 7)
+#define OMAP_MMC_STAT_DATA_CRC (1 << 6)
+#define OMAP_MMC_STAT_DATA_TOUT (1 << 5)
+#define OMAP_MMC_STAT_END_BUSY (1 << 4)
+#define OMAP_MMC_STAT_END_OF_DATA (1 << 3)
+#define OMAP_MMC_STAT_CARD_BUSY (1 << 2)
+#define OMAP_MMC_STAT_END_OF_CMD (1 << 0)
+
+#define OMAP_MMC_READ(base, reg) __raw_readw((base) + OMAP_MMC_REG_##reg)
+#define OMAP_MMC_WRITE(base, reg, val) __raw_writew((val), (base)
+ OMAP_MMC_REG_##reg)
+
+/*
+ * Command types
+ */
+#define OMAP_MMC_CMDTYPE_BC 0
+#define OMAP_MMC_CMDTYPE_BCR 1
+#define OMAP_MMC_CMDTYPE_AC 2
+#define OMAP_MMC_CMDTYPE_ADTC 3
+
+#endif
Adds OMAP MMC driver.
Signed-off-by: Juha Yrj?l? <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
Signed-off-by: Carlos Aguiar <[email protected]>
Index: linux-2.6.16-rc5-git9/drivers/mmc/Kconfig
===================================================================
--- linux-2.6.16-rc5-git9.orig/drivers/mmc/Kconfig 2006-03-07 08:27:42.000000000 -0400
+++ linux-2.6.16-rc5-git9/drivers/mmc/Kconfig 2006-03-07 08:32:29.000000000 -0400
@@ -49,6 +49,17 @@ config MMC_PXA
If unsure, say N.
+config MMC_OMAP
+ tristate "TI OMAP Multimedia Card Interface support"
+ depends on ARCH_OMAP && MMC
+ select TPS65010 if MACH_OMAP_H2
+ help
+ This selects the TI OMAP Multimedia card Interface.
+ If you have an OMAP board with a Multimedia Card slot,
+ say Y or M here.
+
+ If unsure, say N.
+
config MMC_WBSD
tristate "Winbond W83L51xD SD/MMC Card Interface support"
depends on MMC && ISA_DMA_API
Index: linux-2.6.16-rc5-git9/drivers/mmc/Makefile
===================================================================
--- linux-2.6.16-rc5-git9.orig/drivers/mmc/Makefile 2006-03-07 08:27:42.000000000 -0400
+++ linux-2.6.16-rc5-git9/drivers/mmc/Makefile 2006-03-07 08:32:29.000000000 -0400
@@ -19,5 +19,6 @@ obj-$(CONFIG_MMC_ARMMMCI) += mmci.o
obj-$(CONFIG_MMC_PXA) += pxamci.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
+obj-$(CONFIG_MMC_OMAP) += omap.o
mmc_core-y := mmc.o mmc_queue.o mmc_sysfs.o
Index: linux-2.6.16-rc5-git9/drivers/mmc/omap.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.16-rc5-git9/drivers/mmc/omap.c 2006-03-07 16:44:09.000000000 -0400
@@ -0,0 +1,1231 @@
+/*
+ * linux/drivers/media/mmc/omap.c
+ *
+ * Copyright (C) 2004 Nokia Corporation
+ * Written by Tuukka Tikkanen and Juha Yrj?l?<[email protected]>
+ * Misc hacks here and there by Tony Lindgren <[email protected]>
+ * Other hacks (DMA, SD, etc) by David Brownell
+ *
+ * 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/config.h>
+
+#ifdef CONFIG_MMC_DEBUG
+#define DEBUG /* for dev_dbg(), pr_debug(), etc */
+#endif
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/protocol.h>
+#include <linux/mmc/card.h>
+#include <linux/clk.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/scatterlist.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/board.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/fpga.h>
+#include <asm/arch/tps65010.h>
+
+#include "omap.h"
+
+#define DRIVER_NAME "mmci-omap"
+#define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE))
+
+/* Specifies how often in millisecs to poll for card status changes
+ * when the cover switch is open */
+#define OMAP_MMC_SWITCH_POLL_DELAY 500
+
+static int mmc_omap_enable_poll = 1;
+
+struct mmc_omap_host {
+ int initialized;
+ int suspended;
+ struct mmc_request * mrq;
+ struct mmc_command * cmd;
+ struct mmc_data * data;
+ struct mmc_host * mmc;
+ struct device * dev;
+ unsigned char id; /* 16xx chips have 2 MMC blocks */
+ struct clk * iclk;
+ struct clk * fclk;
+ void __iomem *base;
+ int irq;
+ unsigned char bus_mode;
+ unsigned char hw_bus_mode;
+
+ unsigned int sg_len;
+ int sg_idx;
+ u16 * buffer;
+ u32 buffer_bytes_left;
+ u32 total_bytes_left;
+
+ unsigned use_dma:1;
+ unsigned brs_received:1, dma_done:1;
+ unsigned dma_is_read:1;
+ unsigned dma_in_use:1;
+ int dma_ch;
+ spinlock_t dma_lock;
+ struct timer_list dma_timer;
+ unsigned dma_len;
+
+ short power_pin;
+ short wp_pin;
+
+ int switch_pin;
+ struct work_struct switch_work;
+ struct timer_list switch_timer;
+ int switch_last_state;
+};
+
+static inline int
+mmc_omap_cover_is_open(struct mmc_omap_host *host)
+{
+ if (host->switch_pin < 0)
+ return 0;
+ return omap_get_gpio_datain(host->switch_pin);
+}
+
+static ssize_t
+mmc_omap_show_cover_switch(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mmc_omap_host *host = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", mmc_omap_cover_is_open(host) ? "open" :
+ "closed");
+}
+
+static DEVICE_ATTR(cover_switch, S_IRUGO, mmc_omap_show_cover_switch, NULL);
+
+static ssize_t
+mmc_omap_show_enable_poll(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", mmc_omap_enable_poll);
+}
+
+static ssize_t
+mmc_omap_store_enable_poll(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ int enable_poll;
+
+ if (sscanf(buf, "%10d", &enable_poll) != 1)
+ return -EINVAL;
+
+ if (enable_poll != mmc_omap_enable_poll) {
+ struct mmc_omap_host *host = dev_get_drvdata(dev);
+
+ mmc_omap_enable_poll = enable_poll;
+ if (enable_poll && host->switch_pin >= 0)
+ schedule_work(&host->switch_work);
+ }
+ return size;
+}
+
+static DEVICE_ATTR(enable_poll, 0664,
+ mmc_omap_show_enable_poll, mmc_omap_store_enable_poll);
+
+static void
+mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
+{
+ u32 cmdreg;
+ u32 resptype;
+ u32 cmdtype;
+
+ host->cmd = cmd;
+
+ resptype = 0;
+ cmdtype = 0;
+
+ /* Our hardware needs to know exact type */
+ switch (RSP_TYPE(mmc_resp_type(cmd))) {
+ case RSP_TYPE(MMC_RSP_R1):
+ /* resp 1, resp 1b */
+ resptype = 1;
+ break;
+ case RSP_TYPE(MMC_RSP_R2):
+ resptype = 2;
+ break;
+ case RSP_TYPE(MMC_RSP_R3):
+ resptype = 3;
+ break;
+ default:
+ break;
+ }
+
+ if (mmc_cmd_type(cmd) == MMC_CMD_ADTC) {
+ cmdtype = OMAP_MMC_CMDTYPE_ADTC;
+ } else if (mmc_cmd_type(cmd) == MMC_CMD_BC) {
+ cmdtype = OMAP_MMC_CMDTYPE_BC;
+ } else if (mmc_cmd_type(cmd) == MMC_CMD_BCR) {
+ cmdtype = OMAP_MMC_CMDTYPE_BCR;
+ } else {
+ cmdtype = OMAP_MMC_CMDTYPE_AC;
+ }
+
+ cmdreg = cmd->opcode | (resptype << 8) | (cmdtype << 12);
+
+ if (host->bus_mode == MMC_BUSMODE_OPENDRAIN)
+ cmdreg |= 1 << 6;
+
+ if (cmd->flags & MMC_RSP_BUSY)
+ cmdreg |= 1 << 11;
+
+ if (host->data && !(host->data->flags & MMC_DATA_WRITE))
+ cmdreg |= 1 << 15;
+
+ clk_enable(host->fclk);
+
+ OMAP_MMC_WRITE(host->base, CTO, 200);
+ OMAP_MMC_WRITE(host->base, ARGL, cmd->arg & 0xffff);
+ OMAP_MMC_WRITE(host->base, ARGH, cmd->arg >> 16);
+ OMAP_MMC_WRITE(host->base, IE,
+ OMAP_MMC_STAT_A_EMPTY | OMAP_MMC_STAT_A_FULL |
+ OMAP_MMC_STAT_CMD_CRC | OMAP_MMC_STAT_CMD_TOUT |
+ OMAP_MMC_STAT_DATA_CRC | OMAP_MMC_STAT_DATA_TOUT |
+ OMAP_MMC_STAT_END_OF_CMD | OMAP_MMC_STAT_CARD_ERR |
+ OMAP_MMC_STAT_END_OF_DATA);
+ OMAP_MMC_WRITE(host->base, CMD, cmdreg);
+}
+
+static void
+mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ if (host->dma_in_use) {
+ enum dma_data_direction dma_data_dir;
+
+ BUG_ON(host->dma_ch < 0);
+ if (data->error != MMC_ERR_NONE)
+ omap_stop_dma(host->dma_ch);
+ /* Release DMA channel lazily */
+ mod_timer(&host->dma_timer, jiffies + HZ);
+ if (data->flags & MMC_DATA_WRITE)
+ dma_data_dir = DMA_TO_DEVICE;
+ else
+ dma_data_dir = DMA_FROM_DEVICE;
+ dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
+ dma_data_dir);
+ }
+ host->data = NULL;
+ host->sg_len = 0;
+ clk_disable(host->fclk);
+
+ /* NOTE: MMC layer will sometimes poll-wait CMD13 next, issuing
+ * dozens of requests until the card finishes writing data.
+ * It'd be cheaper to just wait till an EOFB interrupt arrives...
+ */
+
+ if (!data->stop) {
+ host->mrq = NULL;
+ mmc_request_done(host->mmc, data->mrq);
+ return;
+ }
+
+ mmc_omap_start_command(host, data->stop);
+}
+
+static void
+mmc_omap_end_of_data(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ unsigned long flags;
+ int done;
+
+ if (!host->dma_in_use) {
+ mmc_omap_xfer_done(host, data);
+ return;
+ }
+ done = 0;
+ spin_lock_irqsave(&host->dma_lock, flags);
+ if (host->dma_done)
+ done = 1;
+ else
+ host->brs_received = 1;
+ spin_unlock_irqrestore(&host->dma_lock, flags);
+ if (done)
+ mmc_omap_xfer_done(host, data);
+}
+
+static void
+mmc_omap_dma_timer(unsigned long data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+
+ BUG_ON(host->dma_ch < 0);
+ omap_free_dma(host->dma_ch);
+ host->dma_ch = -1;
+}
+
+static void
+mmc_omap_dma_done(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ unsigned long flags;
+ int done;
+
+ done = 0;
+ spin_lock_irqsave(&host->dma_lock, flags);
+ if (host->brs_received)
+ done = 1;
+ else
+ host->dma_done = 1;
+ spin_unlock_irqrestore(&host->dma_lock, flags);
+ if (done)
+ mmc_omap_xfer_done(host, data);
+}
+
+static void
+mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
+{
+ host->cmd = NULL;
+
+ if (cmd->flags & MMC_RSP_PRESENT) {
+ if (cmd->flags & MMC_RSP_136) {
+ /* response type 2 */
+ cmd->resp[3] =
+ OMAP_MMC_READ(host->base, RSP0) |
+ (OMAP_MMC_READ(host->base, RSP1) << 16);
+ cmd->resp[2] =
+ OMAP_MMC_READ(host->base, RSP2) |
+ (OMAP_MMC_READ(host->base, RSP3) << 16);
+ cmd->resp[1] =
+ OMAP_MMC_READ(host->base, RSP4) |
+ (OMAP_MMC_READ(host->base, RSP5) << 16);
+ cmd->resp[0] =
+ OMAP_MMC_READ(host->base, RSP6) |
+ (OMAP_MMC_READ(host->base, RSP7) << 16);
+ } else {
+ /* response types 1, 1b, 3, 4, 5, 6 */
+ cmd->resp[0] =
+ OMAP_MMC_READ(host->base, RSP6) |
+ (OMAP_MMC_READ(host->base, RSP7) << 16);
+ }
+ }
+
+ if (host->data == NULL || cmd->error != MMC_ERR_NONE) {
+ host->mrq = NULL;
+ clk_disable(host->fclk);
+ mmc_request_done(host->mmc, cmd->mrq);
+ }
+}
+
+/* PIO only */
+static void
+mmc_omap_sg_to_buf(struct mmc_omap_host *host)
+{
+ struct scatterlist *sg;
+
+ sg = host->data->sg + host->sg_idx;
+ host->buffer_bytes_left = sg->length;
+ host->buffer = page_address(sg->page) + sg->offset;
+ if (host->buffer_bytes_left > host->total_bytes_left)
+ host->buffer_bytes_left = host->total_bytes_left;
+}
+
+/* PIO only */
+static void
+mmc_omap_xfer_data(struct mmc_omap_host *host, int write)
+{
+ int n;
+ void __iomem *reg;
+ u16 *p;
+
+ if (host->buffer_bytes_left == 0) {
+ host->sg_idx++;
+ BUG_ON(host->sg_idx == host->sg_len);
+ mmc_omap_sg_to_buf(host);
+ }
+ n = 64;
+ if (n > host->buffer_bytes_left)
+ n = host->buffer_bytes_left;
+ host->buffer_bytes_left -= n;
+ host->total_bytes_left -= n;
+ host->data->bytes_xfered += n;
+
+ if (write) {
+ __raw_writesw(host->base + OMAP_MMC_REG_DATA, host->buffer, n);
+ } else {
+ __raw_readsw(host->base + OMAP_MMC_REG_DATA, host->buffer, n);
+ }
+}
+
+static inline void mmc_omap_report_irq(u16 status)
+{
+ static const char *mmc_omap_status_bits[] = {
+ "EOC", "CD", "CB", "BRS", "EOFB", "DTO", "DCRC", "CTO",
+ "CCRC", "CRW", "AF", "AE", "OCRB", "CIRQ", "CERR"
+ };
+ int i, c = 0;
+
+ for (i = 0; i < ARRAY_SIZE(mmc_omap_status_bits); i++)
+ if (status & (1 << i)) {
+ if (c)
+ printk(" ");
+ printk("%s", mmc_omap_status_bits[i]);
+ c++;
+ }
+}
+
+static irqreturn_t mmc_omap_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct mmc_omap_host * host = (struct mmc_omap_host *)dev_id;
+ u16 status;
+ int end_command;
+ int end_transfer;
+ int transfer_error;
+
+ if (host->cmd == NULL && host->data == NULL) {
+ status = OMAP_MMC_READ(host->base, STAT);
+ dev_info(mmc_dev(host->mmc),"spurious irq 0x%04x\n", status);
+ if (status != 0) {
+ OMAP_MMC_WRITE(host->base, STAT, status);
+ OMAP_MMC_WRITE(host->base, IE, 0);
+ }
+ return IRQ_HANDLED;
+ }
+
+ end_command = 0;
+ end_transfer = 0;
+ transfer_error = 0;
+
+ while ((status = OMAP_MMC_READ(host->base, STAT)) != 0) {
+ OMAP_MMC_WRITE(host->base, STAT, status);
+#ifdef CONFIG_MMC_DEBUG
+ dev_dbg(mmc_dev(host->mmc), "MMC IRQ %04x (CMD %d): ",
+ status, host->cmd != NULL ? host->cmd->opcode : -1);
+ mmc_omap_report_irq(status);
+ printk("\n");
+#endif
+ if (host->total_bytes_left) {
+ if ((status & OMAP_MMC_STAT_A_FULL) ||
+ (status & OMAP_MMC_STAT_END_OF_DATA))
+ mmc_omap_xfer_data(host, 0);
+ if (status & OMAP_MMC_STAT_A_EMPTY)
+ mmc_omap_xfer_data(host, 1);
+ }
+
+ if (status & OMAP_MMC_STAT_END_OF_DATA) {
+ end_transfer = 1;
+ }
+
+ if (status & OMAP_MMC_STAT_DATA_TOUT) {
+ dev_dbg(mmc_dev(host->mmc), "data timeout\n");
+ if (host->data) {
+ host->data->error |= MMC_ERR_TIMEOUT;
+ transfer_error = 1;
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_DATA_CRC) {
+ if (host->data) {
+ host->data->error |= MMC_ERR_BADCRC;
+ dev_dbg(mmc_dev(host->mmc),
+ "data CRC error, bytes left %d\n",
+ host->total_bytes_left);
+ transfer_error = 1;
+ } else {
+ dev_dbg(mmc_dev(host->mmc), "data CRC error\n");
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_CMD_TOUT) {
+ /* Timeouts are routine with some commands */
+ if (host->cmd) {
+ if (host->cmd->opcode != MMC_ALL_SEND_CID &&
+ host->cmd->opcode !=
+ MMC_SEND_OP_COND &&
+ host->cmd->opcode !=
+ MMC_APP_CMD &&
+ !mmc_omap_cover_is_open(host))
+ dev_err(mmc_dev(host->mmc),
+ "command timeout, CMD %d\n",
+ host->cmd->opcode);
+ host->cmd->error = MMC_ERR_TIMEOUT;
+ end_command = 1;
+ }
+ }
+
+ if (status & OMAP_MMC_STAT_CMD_CRC) {
+ if (host->cmd) {
+ dev_err(mmc_dev(host->mmc),
+ "command CRC error (CMD%d, arg 0x%08x)\n",
+ host->cmd->opcode, host->cmd->arg);
+ host->cmd->error = MMC_ERR_BADCRC;
+ end_command = 1;
+ } else
+ dev_err(mmc_dev(host->mmc),
+ "command CRC error without cmd?\n");
+ }
+
+ if (status & OMAP_MMC_STAT_CARD_ERR) {
+ if (host->cmd && host->cmd->opcode == MMC_STOP_TRANSMISSION) {
+ u32 response = OMAP_MMC_READ(host->base, RSP6)
+ | (OMAP_MMC_READ(host->base, RSP7) << 16);
+ /* STOP sometimes sets must-ignore bits */
+ if (!(response & (R1_CC_ERROR
+ | R1_ILLEGAL_COMMAND
+ | R1_COM_CRC_ERROR))) {
+ end_command = 1;
+ continue;
+ }
+ }
+
+ dev_dbg(mmc_dev(host->mmc), "card status error (CMD%d)\n",
+ host->cmd->opcode);
+ if (host->cmd) {
+ host->cmd->error = MMC_ERR_FAILED;
+ end_command = 1;
+ }
+ if (host->data) {
+ host->data->error = MMC_ERR_FAILED;
+ transfer_error = 1;
+ }
+ }
+
+ /*
+ * NOTE: On 1610 the END_OF_CMD may come too early when
+ * starting a write
+ */
+ if ((status & OMAP_MMC_STAT_END_OF_CMD) &&
+ (!(status & OMAP_MMC_STAT_A_EMPTY))) {
+ end_command = 1;
+ }
+ }
+
+ if (end_command) {
+ mmc_omap_cmd_done(host, host->cmd);
+ }
+ if (transfer_error)
+ mmc_omap_xfer_done(host, host->data);
+ else if (end_transfer)
+ mmc_omap_end_of_data(host, host->data);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mmc_omap_switch_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) dev_id;
+
+ schedule_work(&host->switch_work);
+
+ return IRQ_HANDLED;
+}
+
+static void mmc_omap_switch_timer(unsigned long arg)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) arg;
+
+ schedule_work(&host->switch_work);
+}
+
+/* FIXME: Handle card insertion and removal properly. Maybe use a mask
+ * for MMC state? */
+static void mmc_omap_switch_callback(unsigned long data, u8 mmc_mask)
+{
+}
+
+static void mmc_omap_switch_handler(void *data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+ struct mmc_card *card;
+ static int complained = 0;
+ int cards = 0, cover_open;
+
+ if (host->switch_pin == -1)
+ return;
+ cover_open = mmc_omap_cover_is_open(host);
+ if (cover_open != host->switch_last_state) {
+ kobject_uevent(&host->dev->kobj, KOBJ_CHANGE);
+ host->switch_last_state = cover_open;
+ }
+ mmc_detect_change(host->mmc, 0);
+ list_for_each_entry(card, &host->mmc->cards, node) {
+ if (mmc_card_present(card))
+ cards++;
+ }
+ if (mmc_omap_cover_is_open(host)) {
+ if (!complained) {
+ dev_info(mmc_dev(host->mmc), "cover is open");
+ complained = 1;
+ }
+ if (mmc_omap_enable_poll)
+ mod_timer(&host->switch_timer, jiffies +
+ msecs_to_jiffies(OMAP_MMC_SWITCH_POLL_DELAY));
+ } else {
+ complained = 0;
+ }
+}
+
+/* Prepare to transfer the next segment of a scatterlist */
+static void
+mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ int dma_ch = host->dma_ch;
+ unsigned long data_addr;
+ u16 buf, frame;
+ u32 count;
+ struct scatterlist *sg = &data->sg[host->sg_idx];
+ int src_port = 0;
+ int dst_port = 0;
+ int sync_dev = 0;
+
+ data_addr = io_v2p((u32) host->base) + OMAP_MMC_REG_DATA;
+ frame = 1 << data->blksz_bits;
+ count = sg_dma_len(sg);
+
+ if ((data->blocks == 1) && (count > (1 << data->blksz_bits)))
+ count = frame;
+
+ host->dma_len = count;
+
+ /* FIFO is 16x2 bytes on 15xx, and 32x2 bytes on 16xx and 24xx.
+ * Use 16 or 32 word frames when the blocksize is at least that large.
+ * Blocksize is usually 512 bytes; but not for some SD reads.
+ */
+ if (cpu_is_omap15xx() && frame > 32)
+ frame = 32;
+ else if (frame > 64)
+ frame = 64;
+ count /= frame;
+ frame >>= 1;
+
+ if (!(data->flags & MMC_DATA_WRITE)) {
+ buf = 0x800f | ((frame - 1) << 8);
+
+ if (cpu_class_is_omap1()) {
+ src_port = OMAP_DMA_PORT_TIPB;
+ dst_port = OMAP_DMA_PORT_EMIFF;
+ }
+ if (cpu_is_omap24xx())
+ sync_dev = OMAP24XX_DMA_MMC1_RX;
+
+ omap_set_dma_src_params(dma_ch, src_port,
+ OMAP_DMA_AMODE_CONSTANT,
+ data_addr, 0, 0);
+ omap_set_dma_dest_params(dma_ch, dst_port,
+ OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sg), 0, 0);
+ omap_set_dma_dest_data_pack(dma_ch, 1);
+ omap_set_dma_dest_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
+ } else {
+ buf = 0x0f80 | ((frame - 1) << 0);
+
+ if (cpu_class_is_omap1()) {
+ src_port = OMAP_DMA_PORT_EMIFF;
+ dst_port = OMAP_DMA_PORT_TIPB;
+ }
+ if (cpu_is_omap24xx())
+ sync_dev = OMAP24XX_DMA_MMC1_TX;
+
+ omap_set_dma_dest_params(dma_ch, dst_port,
+ OMAP_DMA_AMODE_CONSTANT,
+ data_addr, 0, 0);
+ omap_set_dma_src_params(dma_ch, src_port,
+ OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sg), 0, 0);
+ omap_set_dma_src_data_pack(dma_ch, 1);
+ omap_set_dma_src_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
+ }
+
+ /* Max limit for DMA frame count is 0xffff */
+ if (unlikely(count > 0xffff))
+ BUG();
+
+ OMAP_MMC_WRITE(host->base, BUF, buf);
+ omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S16,
+ frame, count, OMAP_DMA_SYNC_FRAME,
+ sync_dev, 0);
+}
+
+/* A scatterlist segment completed */
+static void mmc_omap_dma_cb(int lch, u16 ch_status, void *data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+ struct mmc_data *mmcdat = host->data;
+
+ if (unlikely(host->dma_ch < 0)) {
+ dev_err(mmc_dev(host->mmc), "DMA callback while DMA not
+ enabled\n");
+ return;
+ }
+ /* FIXME: We really should do something to _handle_ the errors */
+ if (ch_status & OMAP_DMA_TOUT_IRQ) {
+ dev_err(mmc_dev(host->mmc),"DMA timeout\n");
+ return;
+ }
+ if (ch_status & OMAP_DMA_DROP_IRQ) {
+ dev_err(mmc_dev(host->mmc), "DMA sync error\n");
+ return;
+ }
+ if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
+ return;
+ }
+ mmcdat->bytes_xfered += host->dma_len;
+ host->sg_idx++;
+ if (host->sg_idx < host->sg_len) {
+ mmc_omap_prepare_dma(host, host->data);
+ omap_start_dma(host->dma_ch);
+ } else
+ mmc_omap_dma_done(host, host->data);
+}
+
+static int mmc_omap_get_dma_channel(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ const char *dev_name;
+ int sync_dev, dma_ch, is_read, r;
+
+ is_read = !(data->flags & MMC_DATA_WRITE);
+ del_timer_sync(&host->dma_timer);
+ if (host->dma_ch >= 0) {
+ if (is_read == host->dma_is_read)
+ return 0;
+ omap_free_dma(host->dma_ch);
+ host->dma_ch = -1;
+ }
+
+ if (is_read) {
+ if (host->id == 1) {
+ sync_dev = OMAP_DMA_MMC_RX;
+ dev_name = "MMC1 read";
+ } else {
+ sync_dev = OMAP_DMA_MMC2_RX;
+ dev_name = "MMC2 read";
+ }
+ } else {
+ if (host->id == 1) {
+ sync_dev = OMAP_DMA_MMC_TX;
+ dev_name = "MMC1 write";
+ } else {
+ sync_dev = OMAP_DMA_MMC2_TX;
+ dev_name = "MMC2 write";
+ }
+ }
+ r = omap_request_dma(sync_dev, dev_name, mmc_omap_dma_cb,
+ host, &dma_ch);
+ if (r != 0) {
+ dev_dbg(mmc_dev(host->mmc), "omap_request_dma() failed with %d\n", r);
+ return r;
+ }
+ host->dma_ch = dma_ch;
+ host->dma_is_read = is_read;
+
+ return 0;
+}
+
+static inline void set_cmd_timeout(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ u16 reg;
+
+ reg = OMAP_MMC_READ(host->base, SDIO);
+ reg &= ~(1 << 5);
+ OMAP_MMC_WRITE(host->base, SDIO, reg);
+ /* Set maximum timeout */
+ OMAP_MMC_WRITE(host->base, CTO, 0xff);
+}
+
+static inline void set_data_timeout(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ int timeout;
+ u16 reg;
+
+ /* Convert ns to clock cycles by assuming 20MHz frequency
+ * 1 cycle at 20MHz = 500 ns
+ */
+ timeout = req->data->timeout_clks + req->data->timeout_ns / 500;
+
+ /* Check if we need to use timeout multiplier register */
+ reg = OMAP_MMC_READ(host->base, SDIO);
+ if (timeout > 0xffff) {
+ reg |= (1 << 5);
+ timeout /= 1024;
+ } else
+ reg &= ~(1 << 5);
+ OMAP_MMC_WRITE(host->base, SDIO, reg);
+ OMAP_MMC_WRITE(host->base, DTO, timeout);
+}
+
+static void
+mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
+{
+ struct mmc_data *data = req->data;
+ int i, use_dma, block_size;
+ unsigned sg_len;
+
+ host->data = data;
+ if (data == NULL) {
+ OMAP_MMC_WRITE(host->base, BLEN, 0);
+ OMAP_MMC_WRITE(host->base, NBLK, 0);
+ OMAP_MMC_WRITE(host->base, BUF, 0);
+ host->dma_in_use = 0;
+ set_cmd_timeout(host, req);
+ return;
+ }
+
+
+ block_size = 1 << data->blksz_bits;
+
+ OMAP_MMC_WRITE(host->base, NBLK, data->blocks - 1);
+ OMAP_MMC_WRITE(host->base, BLEN, block_size - 1);
+ set_data_timeout(host, req);
+
+ /* cope with calling layer confusion; it issues "single
+ * block" writes using multi-block scatterlists.
+ */
+ sg_len = (data->blocks == 1) ? 1 : data->sg_len;
+
+ /* Only do DMA for entire blocks */
+ use_dma = host->use_dma;
+ if (use_dma) {
+ for (i = 0; i < sg_len; i++) {
+ if ((data->sg[i].length % block_size) != 0) {
+ use_dma = 0;
+ break;
+ }
+ }
+ }
+
+ host->sg_idx = 0;
+ if (use_dma) {
+ if (mmc_omap_get_dma_channel(host, data) == 0) {
+ enum dma_data_direction dma_data_dir;
+
+ if (data->flags & MMC_DATA_WRITE)
+ dma_data_dir = DMA_TO_DEVICE;
+ else
+ dma_data_dir = DMA_FROM_DEVICE;
+
+ host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
+ sg_len, dma_data_dir);
+ host->total_bytes_left = 0;
+ mmc_omap_prepare_dma(host, req->data);
+ host->brs_received = 0;
+ host->dma_done = 0;
+ host->dma_in_use = 1;
+ } else
+ use_dma = 0;
+ }
+
+ /* Revert to PIO? */
+ if (!use_dma) {
+ OMAP_MMC_WRITE(host->base, BUF, 0x1f1f);
+ host->total_bytes_left = data->blocks * block_size;
+ host->sg_len = sg_len;
+ mmc_omap_sg_to_buf(host);
+ host->dma_in_use = 0;
+ }
+}
+
+static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ WARN_ON(host->mrq != NULL);
+
+ host->mrq = req;
+
+ /* only touch fifo AFTER the controller readies it */
+ mmc_omap_prepare_data(host, req);
+ mmc_omap_start_command(host, req->cmd);
+ if (host->dma_in_use)
+ omap_start_dma(host->dma_ch);
+}
+
+static void innovator_fpga_socket_power(int on)
+{
+#if defined(CONFIG_MACH_OMAP_INNOVATOR) && defined(CONFIG_ARCH_OMAP15XX)
+
+ if (on) {
+ fpga_write(fpga_read(OMAP1510_FPGA_POWER) | (1 << 3),
+ OMAP1510_FPGA_POWER);
+ } else {
+ fpga_write(fpga_read(OMAP1510_FPGA_POWER) & ~(1 << 3),
+ OMAP1510_FPGA_POWER);
+ }
+#endif
+}
+
+/*
+ * Turn the socket power on/off. Innovator uses FPGA, most boards
+ * probably use GPIO.
+ */
+static void mmc_omap_power(struct mmc_omap_host *host, int on)
+{
+ if (on) {
+ if (machine_is_omap_innovator())
+ innovator_fpga_socket_power(1);
+ else if (machine_is_omap_h2())
+ tps65010_set_gpio_out_value(GPIO3, HIGH);
+ else if (machine_is_omap_h3())
+ /* GPIO 4 of TPS65010 sends SD_EN signal */
+ tps65010_set_gpio_out_value(GPIO4, HIGH);
+ else if (cpu_is_omap24xx()) {
+ u16 reg = OMAP_MMC_READ(host->base, CON);
+ OMAP_MMC_WRITE(host->base, CON, reg | (1 << 11));
+ } else
+ if (host->power_pin >= 0)
+ omap_set_gpio_dataout(host->power_pin, 1);
+ } else {
+ if (machine_is_omap_innovator())
+ innovator_fpga_socket_power(0);
+ else if (machine_is_omap_h2())
+ tps65010_set_gpio_out_value(GPIO3, LOW);
+ else if (machine_is_omap_h3())
+ tps65010_set_gpio_out_value(GPIO4, LOW);
+ else if (cpu_is_omap24xx()) {
+ u16 reg = OMAP_MMC_READ(host->base, CON);
+ OMAP_MMC_WRITE(host->base, CON, reg & ~(1 << 11));
+ } else
+ if (host->power_pin >= 0)
+ omap_set_gpio_dataout(host->power_pin, 0);
+ }
+}
+
+static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+ int dsor;
+ int realclock, i;
+
+ realclock = ios->clock;
+
+ if (ios->clock == 0)
+ dsor = 0;
+ else {
+ int func_clk_rate = clk_get_rate(host->fclk);
+
+ dsor = func_clk_rate / realclock;
+ if (dsor < 1)
+ dsor = 1;
+
+ if (func_clk_rate / dsor > realclock)
+ dsor++;
+
+ if (dsor > 250)
+ dsor = 250;
+ dsor++;
+
+ if (ios->bus_width == MMC_BUS_WIDTH_4)
+ dsor |= 1 << 15;
+ }
+
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF:
+ mmc_omap_power(host, 0);
+ break;
+ case MMC_POWER_UP:
+ case MMC_POWER_ON:
+ mmc_omap_power(host, 1);
+ dsor |= 1<<11;
+ break;
+ }
+
+ host->bus_mode = ios->bus_mode;
+ host->hw_bus_mode = host->bus_mode;
+
+ clk_enable(host->fclk);
+
+ /* On insanely high arm_per frequencies something sometimes
+ * goes somehow out of sync, and the POW bit is not being set,
+ * which results in the while loop below getting stuck.
+ * Writing to the CON register twice seems to do the trick. */
+ for (i = 0; i < 2; i++)
+ OMAP_MMC_WRITE(host->base, CON, dsor);
+ if (ios->power_mode == MMC_POWER_UP) {
+ /* Send clock cycles, poll completion */
+ OMAP_MMC_WRITE(host->base, IE, 0);
+ OMAP_MMC_WRITE(host->base, STAT, 0xffff);
+ OMAP_MMC_WRITE(host->base, CMD, 1<<7);
+ while (0 == (OMAP_MMC_READ(host->base, STAT) & 1));
+ OMAP_MMC_WRITE(host->base, STAT, 1);
+ }
+ clk_disable(host->fclk);
+}
+
+static int mmc_omap_get_ro(struct mmc_host *mmc)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ return host->wp_pin && omap_get_gpio_datain(host->wp_pin);
+}
+
+static struct mmc_host_ops mmc_omap_ops = {
+ .request = mmc_omap_request,
+ .set_ios = mmc_omap_set_ios,
+ .get_ro = mmc_omap_get_ro,
+};
+
+static int __init mmc_omap_probe(struct platform_device *pdev)
+{
+ struct omap_mmc_conf *minfo = pdev->dev.platform_data;
+ struct mmc_host *mmc;
+ struct mmc_omap_host *host = NULL;
+ int ret = 0;
+
+ if (platform_get_resource(pdev, IORESOURCE_MEM, 0) ||
+ platform_get_irq(pdev, IORESOURCE_IRQ, 0)) {
+ dev_err(&pdev->dev, "mmc_omap_probe: invalid resource type\n");
+ return -ENODEV;
+ }
+
+ if (!request_mem_region(pdev->resource[0].start,
+ pdev->resource[0].end - pdev->resource[0].start + 1,
+ pdev->name)) {
+ dev_dbg(&pdev->dev, "request_mem_region failed\n");
+ return -EBUSY;
+ }
+
+ mmc = mmc_alloc_host(sizeof(struct mmc_omap_host), &pdev->dev);
+ if (!mmc) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ host = mmc_priv(mmc);
+ host->mmc = mmc;
+
+ spin_lock_init(&host->dma_lock);
+ init_timer(&host->dma_timer);
+ host->dma_timer.function = mmc_omap_dma_timer;
+ host->dma_timer.data = (unsigned long) host;
+
+ host->id = pdev->id;
+
+ if (cpu_is_omap24xx()) {
+ host->iclk = clk_get(&pdev->dev, "mmc_ick");
+ if (IS_ERR(host->iclk))
+ goto out;
+ clk_enable(host->iclk);
+ }
+
+ if (!cpu_is_omap24xx())
+ host->fclk = clk_get(&pdev->dev, "mmc_ck");
+ else
+ host->fclk = clk_get(&pdev->dev, "mmc_fck");
+
+ if (IS_ERR(host->fclk)) {
+ ret = PTR_ERR(host->fclk);
+ goto out;
+ }
+
+ /* REVISIT:
+ * Also, use minfo->cover to decide how to manage
+ * the card detect sensing.
+ */
+ host->power_pin = minfo->power_pin;
+ host->switch_pin = minfo->switch_pin;
+ host->wp_pin = minfo->wp_pin;
+ host->use_dma = 1;
+ host->dma_ch = -1;
+
+ host->irq = pdev->resource[1].start;
+ host->base = ioremap(pdev->res.start, SZ_4K);
+ if (!host->base) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (minfo->wire4)
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
+
+ mmc->ops = &mmc_omap_ops;
+ mmc->f_min = 400000;
+ mmc->f_max = 24000000;
+ mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34;
+
+ /* Use scatterlist DMA to reduce per-transfer costs.
+ * NOTE max_seg_size assumption that small blocks aren't
+ * normally used (except e.g. for reading SD registers).
+ */
+ mmc->max_phys_segs = 32;
+ mmc->max_hw_segs = 32;
+ mmc->max_sectors = 256; /* NBLK max 11-bits, OMAP also limited by DMA */
+ mmc->max_seg_size = mmc->max_sectors * 512;
+
+ if (host->power_pin >= 0) {
+ if ((ret = omap_request_gpio(host->power_pin)) != 0) {
+ dev_err(mmc_dev(host->mmc), "Unable to get GPIO
+ pin for MMC power\n");
+ goto out;
+ }
+ omap_set_gpio_direction(host->power_pin, 0);
+ }
+
+ ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
+ if (ret)
+ goto out;
+
+ host->dev = &pdev->dev;
+ platform_set_drvdata(pdev, host);
+
+ mmc_add_host(mmc);
+
+ if (host->switch_pin >= 0) {
+ INIT_WORK(&host->switch_work, mmc_omap_switch_handler, host);
+ init_timer(&host->switch_timer);
+ host->switch_timer.function = mmc_omap_switch_timer;
+ host->switch_timer.data = (unsigned long) host;
+ if (omap_request_gpio(host->switch_pin) != 0) {
+ dev_warn(mmc_dev(host->mmc), "Unable to get GPIO pin for MMC cover switch\n");
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+
+ omap_set_gpio_direction(host->switch_pin, 1);
+ ret = request_irq(OMAP_GPIO_IRQ(host->switch_pin),
+ mmc_omap_switch_irq, SA_TRIGGER_RISING, DRIVER_NAME, host);
+ if (ret) {
+ dev_warn(mmc_dev(host->mmc), "Unable to get IRQ for MMC cover switch\n");
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+ ret = device_create_file(&pdev->dev, &dev_attr_cover_switch);
+ if (ret == 0) {
+ ret = device_create_file(&pdev->dev, &dev_attr_enable_poll);
+ if (ret != 0)
+ device_remove_file(&pdev->dev, &dev_attr_cover_switch);
+ }
+ if (ret) {
+ dev_wan(mmc_dev(host->mmc), "Unable to create sysfs attributes\n");
+ free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ goto no_switch;
+ }
+ if (mmc_omap_enable_poll && mmc_omap_cover_is_open(host))
+ schedule_work(&host->switch_work);
+ }
+
+no_switch:
+ return 0;
+
+out:
+ /* FIXME: Free other resources too. */
+ if (host) {
+ if (host->iclk && !IS_ERR(host->iclk))
+ clk_put(host->iclk);
+ if (host->fclk && !IS_ERR(host->fclk))
+ clk_put(host->fclk);
+ mmc_free_host(host->mmc);
+ }
+ return ret;
+}
+
+static int mmc_omap_remove(struct platform_device *pdev)
+{
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (host) {
+ mmc_remove_host(host->mmc);
+ free_irq(host->irq, host);
+
+ if (host->power_pin >= 0)
+ omap_free_gpio(host->power_pin);
+ if (host->switch_pin >= 0) {
+ device_remove_file(&pdev->dev, &dev_attr_enable_poll);
+ device_remove_file(&pdev->dev, &dev_attr_cover_switch);
+ free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
+ omap_free_gpio(host->switch_pin);
+ host->switch_pin = -1;
+ del_timer_sync(&host->switch_timer);
+ flush_scheduled_work();
+ }
+ if (host->iclk && !IS_ERR(host->iclk))
+ clk_put(host->iclk);
+ if (host->fclk && !IS_ERR(host->fclk))
+ clk_put(host->fclk);
+ mmc_free_host(host->mmc);
+ }
+
+ release_mem_region(pdev->resource[0].start,
+ pdev->resource[0].end - pdev->resource[0].start + 1);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int mmc_omap_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ int ret = 0;
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ if (host && host->suspended)
+ return 0;
+
+ if (host) {
+ ret = mmc_suspend_host(host->mmc, mesg);
+ if (ret == 0)
+ host->suspended = 1;
+ }
+ return ret;
+}
+
+static int mmc_omap_resume(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct mmc_omap_host *host = platform_get_drvdata(pdev);
+
+ if (host && !host->suspended)
+ return 0;
+
+ if (host) {
+ ret = mmc_resume_host(host->mmc);
+ if (ret == 0)
+ host->suspended = 0;
+ }
+
+ return ret;
+}
+#else
+#define mmc_omap_suspend NULL
+#define mmc_omap_resume NULL
+#endif
+
+static struct platform_driver mmc_omap_driver = {
+ .probe = mmc_omap_probe,
+ .remove = mmc_omap_remove,
+ .suspend = mmc_omap_suspend,
+ .resume = mmc_omap_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+static int __init mmc_omap_init(void)
+{
+ return platform_driver_register(&mmc_omap_driver);
+}
+
+static void __exit mmc_omap_exit(void)
+{
+ platform_driver_unregister(&mmc_omap_driver);
+}
+
+module_init(mmc_omap_init);
+module_exit(mmc_omap_exit);
+
+MODULE_DESCRIPTION("OMAP Multimedia Card driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS(DRIVER_NAME);
+MODULE_AUTHOR("Juha Yrj?l?");
Index: linux-2.6.16-rc5-git9/drivers/mmc/omap.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.16-rc5-git9/drivers/mmc/omap.h 2006-03-07 08:32:29.000000000 -0400
@@ -0,0 +1,55 @@
+#ifndef DRIVERS_MEDIA_MMC_OMAP_H
+#define DRIVERS_MEDIA_MMC_OMAP_H
+
+#define OMAP_MMC_REG_CMD 0x00
+#define OMAP_MMC_REG_ARGL 0x04
+#define OMAP_MMC_REG_ARGH 0x08
+#define OMAP_MMC_REG_CON 0x0c
+#define OMAP_MMC_REG_STAT 0x10
+#define OMAP_MMC_REG_IE 0x14
+#define OMAP_MMC_REG_CTO 0x18
+#define OMAP_MMC_REG_DTO 0x1c
+#define OMAP_MMC_REG_DATA 0x20
+#define OMAP_MMC_REG_BLEN 0x24
+#define OMAP_MMC_REG_NBLK 0x28
+#define OMAP_MMC_REG_BUF 0x2c
+#define OMAP_MMC_REG_SDIO 0x34
+#define OMAP_MMC_REG_REV 0x3c
+#define OMAP_MMC_REG_RSP0 0x40
+#define OMAP_MMC_REG_RSP1 0x44
+#define OMAP_MMC_REG_RSP2 0x48
+#define OMAP_MMC_REG_RSP3 0x4c
+#define OMAP_MMC_REG_RSP4 0x50
+#define OMAP_MMC_REG_RSP5 0x54
+#define OMAP_MMC_REG_RSP6 0x58
+#define OMAP_MMC_REG_RSP7 0x5c
+#define OMAP_MMC_REG_IOSR 0x60
+#define OMAP_MMC_REG_SYSC 0x64
+#define OMAP_MMC_REG_SYSS 0x68
+
+#define OMAP_MMC_STAT_CARD_ERR (1 << 14)
+#define OMAP_MMC_STAT_CARD_IRQ (1 << 13)
+#define OMAP_MMC_STAT_OCR_BUSY (1 << 12)
+#define OMAP_MMC_STAT_A_EMPTY (1 << 11)
+#define OMAP_MMC_STAT_A_FULL (1 << 10)
+#define OMAP_MMC_STAT_CMD_CRC (1 << 8)
+#define OMAP_MMC_STAT_CMD_TOUT (1 << 7)
+#define OMAP_MMC_STAT_DATA_CRC (1 << 6)
+#define OMAP_MMC_STAT_DATA_TOUT (1 << 5)
+#define OMAP_MMC_STAT_END_BUSY (1 << 4)
+#define OMAP_MMC_STAT_END_OF_DATA (1 << 3)
+#define OMAP_MMC_STAT_CARD_BUSY (1 << 2)
+#define OMAP_MMC_STAT_END_OF_CMD (1 << 0)
+
+#define OMAP_MMC_READ(base, reg) __raw_readw((base) + OMAP_MMC_REG_##reg)
+#define OMAP_MMC_WRITE(base, reg, val) __raw_writew((val), (base) + OMAP_MMC_REG_##reg)
+
+/*
+ * Command types
+ */
+#define OMAP_MMC_CMDTYPE_BC 0
+#define OMAP_MMC_CMDTYPE_BCR 1
+#define OMAP_MMC_CMDTYPE_AC 2
+#define OMAP_MMC_CMDTYPE_ADTC 3
+
+#endif