The patch titled
From: Lars-Peter Clausen <l...@metafoo.de>
has been added to the -mm tree. Its filename is
mmc-add-jz4740-mmc-driver-v6.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: From: Lars-Peter Clausen <l...@metafoo.de>
- Rework Kconfig entry
- Avoid reloading the fifo address before each read/write
Signed-off-by: Lars-Peter Clausen <l...@metafoo.de>
Cc: Matt Fleming <m...@console-pimps.org>
Cc: Ralf Baechle <r...@linux-mips.org>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
---
arch/mips/include/asm/mach-jz4740/jz4740_mmc.h | 15
drivers/mmc/host/Kconfig | 17
drivers/mmc/host/jz4740_mmc.c | 490 ++++++++-------
include/linux/mmc/jz4740_mmc.h | 15
4 files changed, 301 insertions(+), 236 deletions(-)
diff -puN /dev/null arch/mips/include/asm/mach-jz4740/jz4740_mmc.h
--- /dev/null
+++ a/arch/mips/include/asm/mach-jz4740/jz4740_mmc.h
@@ -0,0 +1,15 @@
+#ifndef __LINUX_MMC_JZ4740_MMC
+#define __LINUX_MMC_JZ4740_MMC
+
+struct jz4740_mmc_platform_data {
+ int gpio_power;
+ int gpio_card_detect;
+ int gpio_read_only;
+ unsigned card_detect_active_low:1;
+ unsigned read_only_active_low:1;
+ unsigned power_active_low:1;
+
+ unsigned data_1bit:1;
+};
+
+#endif
diff -puN drivers/mmc/host/Kconfig~mmc-add-jz4740-mmc-driver-v6
drivers/mmc/host/Kconfig
--- a/drivers/mmc/host/Kconfig~mmc-add-jz4740-mmc-driver-v6
+++ a/drivers/mmc/host/Kconfig
@@ -81,14 +81,6 @@ config MMC_RICOH_MMC
If unsure, say Y.
-config MMC_JZ4740
- tristate "JZ4740 SD/Multimedia Card Interface support"
- depends on MACH_JZ4740
- help
- This selects the Ingenic Z4740 SD/Multimedia card Interface.
- If you have an ngenic platform with a Multimedia Card slot,
- say Y or M here.
-
config MMC_SDHCI_OF
tristate "SDHCI support on OpenFirmware platforms"
depends on MMC_SDHCI && PPC_OF
@@ -440,3 +432,12 @@ config MMC_SH_MMCIF
This selects the MMC Host Interface controler (MMCIF).
This driver supports MMCIF in sh7724/sh7757/sh7372.
+
+config MMC_JZ4740
+ tristate "JZ4740 SD/Multimedia Card Interface support"
+ depends on MACH_JZ4740
+ help
+ This selects support for the SD/MMC controller on Ingenic JZ4740
+ SoCs.
+ If you have a board based on such a SoC and with a SD/MMC slot,
+ say Y or M here.
diff -puN drivers/mmc/host/jz4740_mmc.c~mmc-add-jz4740-mmc-driver-v6
drivers/mmc/host/jz4740_mmc.c
--- a/drivers/mmc/host/jz4740_mmc.c~mmc-add-jz4740-mmc-driver-v6
+++ a/drivers/mmc/host/jz4740_mmc.c
@@ -22,7 +22,6 @@
#include <linux/delay.h>
#include <linux/scatterlist.h>
#include <linux/clk.h>
-#include <linux/mmc/jz4740_mmc.h>
#include <linux/bitops.h>
#include <linux/gpio.h>
@@ -30,6 +29,7 @@
#include <asm/cacheflush.h>
#include <linux/dma-mapping.h>
+#include <asm/mach-jz4740/jz4740_mmc.h>
#define JZ_REG_MMC_STRPCL 0x00
#define JZ_REG_MMC_STATUS 0x04
@@ -103,7 +103,12 @@
#define JZ_MMC_CLK_RATE 24000000
-#define JZ4740_MMC_MAX_TIMEOUT 10000000
+enum jz4740_mmc_state {
+ JZ4740_MMC_STATE_READ_RESPONSE,
+ JZ4740_MMC_STATE_TRANSFER_DATA,
+ JZ4740_MMC_STATE_SEND_STOP,
+ JZ4740_MMC_STATE_DONE,
+};
struct jz4740_mmc_host {
struct mmc_host *mmc;
@@ -121,7 +126,6 @@ struct jz4740_mmc_host {
unsigned long waiting;
- int max_clock;
uint32_t cmdat;
uint16_t irq_mask;
@@ -129,6 +133,8 @@ struct jz4740_mmc_host {
spinlock_t lock;
struct timer_list timeout_timer;
+ struct sg_mapping_iter miter;
+ enum jz4740_mmc_state state;
};
static void jz4740_mmc_set_irq_enabled(struct jz4740_mmc_host *host,
@@ -160,22 +166,24 @@ static void jz4740_mmc_clock_enable(stru
static void jz4740_mmc_clock_disable(struct jz4740_mmc_host *host)
{
uint32_t status;
+ unsigned int timeout = 1000;
writew(JZ_MMC_STRPCL_CLOCK_STOP, host->base + JZ_REG_MMC_STRPCL);
do {
status = readl(host->base + JZ_REG_MMC_STATUS);
- } while (status & JZ_MMC_STATUS_CLK_EN);
+ } while (status & JZ_MMC_STATUS_CLK_EN && --timeout);
}
static void jz4740_mmc_reset(struct jz4740_mmc_host *host)
{
uint32_t status;
+ unsigned int timeout = 1000;
writew(JZ_MMC_STRPCL_RESET, host->base + JZ_REG_MMC_STRPCL);
udelay(10);
do {
status = readl(host->base + JZ_REG_MMC_STATUS);
- } while (status & JZ_MMC_STATUS_IS_RESETTING);
+ } while (status & JZ_MMC_STATUS_IS_RESETTING && --timeout);
}
static void jz4740_mmc_request_done(struct jz4740_mmc_host *host)
@@ -188,177 +196,171 @@ static void jz4740_mmc_request_done(stru
mmc_request_done(host->mmc, req);
}
-static unsigned int jz4740_mmc_wait_irq(struct jz4740_mmc_host *host,
+static unsigned int jz4740_mmc_poll_irq(struct jz4740_mmc_host *host,
unsigned int irq)
{
- unsigned int timeout = JZ4740_MMC_MAX_TIMEOUT;
+ unsigned int timeout = 0x800;
uint16_t status;
do {
status = readw(host->base + JZ_REG_MMC_IREG);
} while (!(status & irq) && --timeout);
- return timeout;
+ if (timeout == 0) {
+ set_bit(0, &host->waiting);
+ mod_timer(&host->timeout_timer, jiffies + 5*HZ);
+ jz4740_mmc_set_irq_enabled(host, irq, true);
+ return true;
+ }
+
+ return false;
}
-static void jz4740_mmc_write_data(struct jz4740_mmc_host *host,
+static void jz4740_mmc_transfer_check_state(struct jz4740_mmc_host *host,
struct mmc_data *data)
{
- struct sg_mapping_iter miter;
- uint32_t *buf;
int status;
- unsigned int timeout;
+
+ status = readl(host->base + JZ_REG_MMC_STATUS);
+ if (status & JZ_MMC_STATUS_WRITE_ERROR_MASK) {
+ if (status & (JZ_MMC_STATUS_TIMEOUT_WRITE)) {
+ host->req->cmd->error = -ETIMEDOUT;
+ data->error = -ETIMEDOUT;
+ } else {
+ host->req->cmd->error = -EIO;
+ data->error = -EIO;
+ }
+ }
+}
+
+static bool jz4740_mmc_write_data(struct jz4740_mmc_host *host,
+ struct mmc_data *data)
+{
+ struct sg_mapping_iter *miter = &host->miter;
+ void __iomem *fifo_addr = host->base + JZ_REG_MMC_TXFIFO;
+ uint32_t *buf;
+ bool timeout;
size_t i, j;
- sg_miter_start(&miter, data->sg, data->sg_len, SG_MITER_FROM_SG);
- while (sg_miter_next(&miter)) {
- buf = miter.addr;
- i = miter.length / 4;
- j = i >> 3;
+ while (sg_miter_next(miter)) {
+ buf = miter->addr;
+ i = miter->length / 4;
+ j = i / 8;
i = i & 0x7;
while (j) {
- timeout = jz4740_mmc_wait_irq(host,
JZ_MMC_IRQ_TXFIFO_WR_REQ);
- if (unlikely(timeout == 0)) {
- sg_miter_stop(&miter);
- goto err_timeout;
- }
-
- writel(buf[0], host->base + JZ_REG_MMC_TXFIFO);
- writel(buf[1], host->base + JZ_REG_MMC_TXFIFO);
- writel(buf[2], host->base + JZ_REG_MMC_TXFIFO);
- writel(buf[3], host->base + JZ_REG_MMC_TXFIFO);
- writel(buf[4], host->base + JZ_REG_MMC_TXFIFO);
- writel(buf[5], host->base + JZ_REG_MMC_TXFIFO);
- writel(buf[6], host->base + JZ_REG_MMC_TXFIFO);
- writel(buf[7], host->base + JZ_REG_MMC_TXFIFO);
+ timeout = jz4740_mmc_poll_irq(host,
JZ_MMC_IRQ_TXFIFO_WR_REQ);
+ if (unlikely(timeout))
+ goto poll_timeout;
+
+ writel(buf[0], fifo_addr);
+ writel(buf[1], fifo_addr);
+ writel(buf[2], fifo_addr);
+ writel(buf[3], fifo_addr);
+ writel(buf[4], fifo_addr);
+ writel(buf[5], fifo_addr);
+ writel(buf[6], fifo_addr);
+ writel(buf[7], fifo_addr);
buf += 8;
--j;
}
if (unlikely(i)) {
- timeout = jz4740_mmc_wait_irq(host,
JZ_MMC_IRQ_TXFIFO_WR_REQ);
- if (unlikely(timeout == 0)) {
- sg_miter_stop(&miter);
- goto err_timeout;
- }
+ timeout = jz4740_mmc_poll_irq(host,
JZ_MMC_IRQ_TXFIFO_WR_REQ);
+ if (unlikely(timeout))
+ goto poll_timeout;
while (i) {
- writel(*buf, host->base + JZ_REG_MMC_TXFIFO);
+ writel(*buf, fifo_addr);
++buf;
--i;
}
}
- data->bytes_xfered += miter.length;
- }
- sg_miter_stop(&miter);
-
- status = readl(host->base + JZ_REG_MMC_STATUS);
- if (status & JZ_MMC_STATUS_WRITE_ERROR_MASK) {
- if (status & (JZ_MMC_STATUS_TIMEOUT_WRITE)) {
- host->req->cmd->error = -ETIMEDOUT;
- data->error = -ETIMEDOUT;
- } else {
- host->req->cmd->error = -EIO;
- data->error = -EIO;
- }
- return;
+ data->bytes_xfered += miter->length;
}
+ sg_miter_stop(miter);
- timeout = JZ4740_MMC_MAX_TIMEOUT;
- do {
- status = readl(host->base + JZ_REG_MMC_STATUS);
- } while ((status & JZ_MMC_STATUS_DATA_TRAN_DONE) == 0 && --timeout);
+ return false;
- if (unlikely(timeout == 0))
- goto err_timeout;
- writew(JZ_MMC_IRQ_DATA_TRAN_DONE, host->base + JZ_REG_MMC_IREG);
+poll_timeout:
+ miter->consumed = (void *)buf - miter->addr;
+ data->bytes_xfered += miter->consumed;
+ sg_miter_stop(miter);
- return;
-
-err_timeout:
- host->req->cmd->error = -ETIMEDOUT;
- data->error = -ETIMEDOUT;
+ return true;
}
-static void jz4740_mmc_read_data(struct jz4740_mmc_host *host,
+static bool jz4740_mmc_read_data(struct jz4740_mmc_host *host,
struct mmc_data *data)
{
- struct sg_mapping_iter miter;
+ struct sg_mapping_iter *miter = &host->miter;
+ void __iomem *fifo_addr = host->base + JZ_REG_MMC_RXFIFO;
uint32_t *buf;
uint32_t d;
- uint16_t status = 0;
+ uint16_t status;
size_t i, j;
unsigned int timeout;
- sg_miter_start(&miter, data->sg, data->sg_len, SG_MITER_TO_SG);
- while (sg_miter_next(&miter)) {
- buf = miter.addr;
- i = miter.length;
- j = i >> 5;
+ while (sg_miter_next(miter)) {
+ buf = miter->addr;
+ i = miter->length;
+ j = i / 32;
i = i & 0x1f;
while (j) {
- timeout = jz4740_mmc_wait_irq(host,
JZ_MMC_IRQ_RXFIFO_RD_REQ);
- if (unlikely(timeout == 0)) {
- sg_miter_stop(&miter);
- goto err_timeout;
- }
-
- buf[0] = readl(host->base + JZ_REG_MMC_RXFIFO);
- buf[1] = readl(host->base + JZ_REG_MMC_RXFIFO);
- buf[2] = readl(host->base + JZ_REG_MMC_RXFIFO);
- buf[3] = readl(host->base + JZ_REG_MMC_RXFIFO);
- buf[4] = readl(host->base + JZ_REG_MMC_RXFIFO);
- buf[5] = readl(host->base + JZ_REG_MMC_RXFIFO);
- buf[6] = readl(host->base + JZ_REG_MMC_RXFIFO);
- buf[7] = readl(host->base + JZ_REG_MMC_RXFIFO);
+ timeout = jz4740_mmc_poll_irq(host,
JZ_MMC_IRQ_RXFIFO_RD_REQ);
+ if (unlikely(timeout))
+ goto poll_timeout;
+
+ buf[0] = readl(fifo_addr);
+ buf[1] = readl(fifo_addr);
+ buf[2] = readl(fifo_addr);
+ buf[3] = readl(fifo_addr);
+ buf[4] = readl(fifo_addr);
+ buf[5] = readl(fifo_addr);
+ buf[6] = readl(fifo_addr);
+ buf[7] = readl(fifo_addr);
buf += 8;
--j;
}
- while (i >= 4) {
- timeout = jz4740_mmc_wait_irq(host,
JZ_MMC_IRQ_RXFIFO_RD_REQ);
- if (unlikely(timeout == 0)) {
- sg_miter_stop(&miter);
- goto err_timeout;
+ if (unlikely(i)) {
+ timeout = jz4740_mmc_poll_irq(host,
JZ_MMC_IRQ_RXFIFO_RD_REQ);
+ if (unlikely(timeout))
+ goto poll_timeout;
+
+ while (i >= 4) {
+ *buf++ = readl(fifo_addr);
+ i -= 4;
+ }
+ if (unlikely(i > 0)) {
+ d = readl(fifo_addr);
+ memcpy(buf, &d, i);
}
-
- *buf++ = readl(host->base + JZ_REG_MMC_RXFIFO);
- i -= 4;
- }
- if (unlikely(i > 0)) {
- d = readl(host->base + JZ_REG_MMC_RXFIFO);
- memcpy(buf, &d, i);
}
- data->bytes_xfered += miter.length;
+ data->bytes_xfered += miter->length;
- /* This can go away once MIPS implements
flush_kernel_dcache_page */
- flush_dcache_page(miter.page);
- }
- sg_miter_stop(&miter);
-
- status = readl(host->base + JZ_REG_MMC_STATUS);
- if (status & JZ_MMC_STATUS_READ_ERROR_MASK) {
- if (status & JZ_MMC_STATUS_TIMEOUT_READ) {
- host->req->cmd->error = -ETIMEDOUT;
- data->error = -ETIMEDOUT;
- } else {
- host->req->cmd->error = -EIO;
- data->error = -EIO;
- }
- return;
+ /* This can go away once MIPS implements
+ * flush_kernel_dcache_page */
+ flush_dcache_page(miter->page);
}
+ sg_miter_stop(miter);
/* For whatever reason there is sometime one word more in the fifo then
* requested */
- while ((status & JZ_MMC_STATUS_DATA_FIFO_EMPTY) == 0 && --timeout) {
- d = readl(host->base + JZ_REG_MMC_RXFIFO);
+ timeout = 1000;
+ status = readl(host->base + JZ_REG_MMC_STATUS);
+ while (!(status & JZ_MMC_STATUS_DATA_FIFO_EMPTY) && --timeout) {
+ d = readl(fifo_addr);
status = readl(host->base + JZ_REG_MMC_STATUS);
}
- return;
-err_timeout:
- host->req->cmd->error = -ETIMEDOUT;
- data->error = -ETIMEDOUT;
+ return false;
+
+poll_timeout:
+ miter->consumed = (void *)buf - miter->addr;
+ data->bytes_xfered += miter->consumed;
+ sg_miter_stop(miter);
+
+ return true;
}
static void jz4740_mmc_timeout(unsigned long data)
@@ -379,19 +381,21 @@ static void jz4740_mmc_read_response(str
{
int i;
uint16_t tmp;
+ void __iomem *fifo_addr = host->base + JZ_REG_MMC_RESP_FIFO;
if (cmd->flags & MMC_RSP_136) {
- tmp = readw(host->base + JZ_REG_MMC_RESP_FIFO);
+ tmp = readw(fifo_addr);
for (i = 0; i < 4; ++i) {
cmd->resp[i] = tmp << 24;
- cmd->resp[i] |= readw(host->base +
JZ_REG_MMC_RESP_FIFO) << 8;
- tmp = readw(host->base + JZ_REG_MMC_RESP_FIFO);
+ tmp = readw(fifo_addr);
+ cmd->resp[i] |= tmp << 8;
+ tmp = readw(fifo_addr);
cmd->resp[i] |= tmp >> 8;
}
} else {
- cmd->resp[0] = readw(host->base + JZ_REG_MMC_RESP_FIFO) << 24;
- cmd->resp[0] |= readw(host->base + JZ_REG_MMC_RESP_FIFO) << 8;
- cmd->resp[0] |= readw(host->base + JZ_REG_MMC_RESP_FIFO) & 0xff;
+ cmd->resp[0] = readw(fifo_addr) << 24;
+ cmd->resp[0] |= readw(fifo_addr) << 8;
+ cmd->resp[0] |= readw(fifo_addr) & 0xff;
}
}
@@ -441,41 +445,78 @@ static void jz4740_mmc_send_command(stru
jz4740_mmc_clock_enable(host, 1);
}
+static void jz_mmc_prepare_data_transfer(struct jz4740_mmc_host *host)
+{
+ struct mmc_command *cmd = host->req->cmd;
+ struct mmc_data *data = cmd->data;
+ int direction;
+
+ if (data->flags & MMC_DATA_READ)
+ direction = SG_MITER_TO_SG;
+ else
+ direction = SG_MITER_FROM_SG;
+
+ sg_miter_start(&host->miter, data->sg, data->sg_len, direction);
+}
+
static irqreturn_t jz_mmc_irq_worker(int irq, void *devid)
{
struct jz4740_mmc_host *host = (struct jz4740_mmc_host *)devid;
struct mmc_command *cmd = host->req->cmd;
struct mmc_request *req = host->req;
- unsigned int timeout = JZ4740_MMC_MAX_TIMEOUT;
- uint32_t status;
+ bool timeout = false;
if (cmd->error)
- goto done;
+ host->state = JZ4740_MMC_STATE_DONE;
- if (cmd->flags & MMC_RSP_PRESENT)
- jz4740_mmc_read_response(host, cmd);
+ switch (host->state) {
+ case JZ4740_MMC_STATE_READ_RESPONSE:
+ if (cmd->flags & MMC_RSP_PRESENT)
+ jz4740_mmc_read_response(host, cmd);
- if (cmd->data) {
+ if (!cmd->data)
+ break;
+
+ jz_mmc_prepare_data_transfer(host);
+
+ case JZ4740_MMC_STATE_TRANSFER_DATA:
if (cmd->data->flags & MMC_DATA_READ)
- jz4740_mmc_read_data(host, cmd->data);
+ timeout = jz4740_mmc_read_data(host, cmd->data);
else
- jz4740_mmc_write_data(host, cmd->data);
- }
+ timeout = jz4740_mmc_write_data(host, cmd->data);
+
+ if (unlikely(timeout)) {
+ host->state = JZ4740_MMC_STATE_TRANSFER_DATA;
+ break;
+ }
+
+ jz4740_mmc_transfer_check_state(host, cmd->data);
+
+ timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_DATA_TRAN_DONE);
+ if (unlikely(timeout)) {
+ host->state = JZ4740_MMC_STATE_SEND_STOP;
+ break;
+ }
+ writew(JZ_MMC_IRQ_DATA_TRAN_DONE, host->base + JZ_REG_MMC_IREG);
+
+ case JZ4740_MMC_STATE_SEND_STOP:
+ if (!req->stop)
+ break;
- if (req->stop) {
jz4740_mmc_send_command(host, req->stop);
- do {
- status = readw(host->base + JZ_REG_MMC_IREG);
- } while ((status & JZ_MMC_IRQ_PRG_DONE) == 0 && --timeout);
- writew(JZ_MMC_IRQ_PRG_DONE, host->base + JZ_REG_MMC_IREG);
- }
- if (unlikely(timeout == 0))
- req->stop->error = -ETIMEDOUT;
+ timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_PRG_DONE);
+ if (timeout) {
+ host->state = JZ4740_MMC_STATE_DONE;
+ break;
+ }
+ case JZ4740_MMC_STATE_DONE:
+ break;
+ }
-done:
- jz4740_mmc_request_done(host);
+ if (!timeout)
+ jz4740_mmc_request_done(host);
return IRQ_HANDLED;
}
@@ -483,8 +524,8 @@ done:
static irqreturn_t jz_mmc_irq(int irq, void *devid)
{
struct jz4740_mmc_host *host = devid;
+ struct mmc_command *cmd = host->cmd;
uint16_t irq_reg, status, tmp;
- irqreturn_t ret = IRQ_HANDLED;
irq_reg = readw(host->base + JZ_REG_MMC_IREG);
@@ -492,7 +533,7 @@ static irqreturn_t jz_mmc_irq(int irq, v
irq_reg &= ~host->irq_mask;
tmp &= ~(JZ_MMC_IRQ_TXFIFO_WR_REQ | JZ_MMC_IRQ_RXFIFO_RD_REQ |
- JZ_MMC_IRQ_PRG_DONE | JZ_MMC_IRQ_DATA_TRAN_DONE);
+ JZ_MMC_IRQ_PRG_DONE | JZ_MMC_IRQ_DATA_TRAN_DONE);
if (tmp != irq_reg)
writew(tmp & ~irq_reg, host->base + JZ_REG_MMC_IREG);
@@ -500,39 +541,39 @@ static irqreturn_t jz_mmc_irq(int irq, v
if (irq_reg & JZ_MMC_IRQ_SDIO) {
writew(JZ_MMC_IRQ_SDIO, host->base + JZ_REG_MMC_IREG);
mmc_signal_sdio_irq(host->mmc);
+ irq_reg &= ~JZ_MMC_IRQ_SDIO;
}
- if (!host->req || !host->cmd)
- goto handled;
-
- if (!(irq_reg & JZ_MMC_IRQ_END_CMD_RES))
- goto handled;
-
- if (test_and_clear_bit(0, &host->waiting)) {
- del_timer(&host->timeout_timer);
+ if (host->req && cmd && irq_reg) {
+ if (test_and_clear_bit(0, &host->waiting)) {
+ del_timer(&host->timeout_timer);
+
+ status = readl(host->base + JZ_REG_MMC_STATUS);
+
+ if (status & JZ_MMC_STATUS_TIMEOUT_RES) {
+ cmd->error = -ETIMEDOUT;
+ } else if (status & JZ_MMC_STATUS_CRC_RES_ERR) {
+ cmd->error = -EIO;
+ } else if (status & (JZ_MMC_STATUS_CRC_READ_ERROR |
+ JZ_MMC_STATUS_CRC_WRITE_ERROR)) {
+ if (cmd->data)
+ cmd->data->error = -EIO;
+ cmd->error = -EIO;
+ } else if (status & (JZ_MMC_STATUS_CRC_READ_ERROR |
+ JZ_MMC_STATUS_CRC_WRITE_ERROR)) {
+ if (cmd->data)
+ cmd->data->error = -EIO;
+ cmd->error = -EIO;
+ }
- status = readl(host->base + JZ_REG_MMC_STATUS);
+ jz4740_mmc_set_irq_enabled(host, irq_reg, false);
+ writew(irq_reg, host->base + JZ_REG_MMC_IREG);
- if (status & JZ_MMC_STATUS_TIMEOUT_RES) {
- host->cmd->error = -ETIMEDOUT;
- } else if (status & JZ_MMC_STATUS_CRC_RES_ERR) {
- host->cmd->error = -EIO;
- } else if (status & (JZ_MMC_STATUS_CRC_READ_ERROR |
- JZ_MMC_STATUS_CRC_WRITE_ERROR)) {
- host->cmd->data->error = -EIO;
- } else if (status & (JZ_MMC_STATUS_CRC_READ_ERROR |
- JZ_MMC_STATUS_CRC_WRITE_ERROR)) {
- host->cmd->data->error = -EIO;
+ return IRQ_WAKE_THREAD;
}
-
- ret = IRQ_WAKE_THREAD;
}
- jz4740_mmc_set_irq_enabled(host, JZ_MMC_IRQ_END_CMD_RES, false);
- writew(JZ_MMC_IRQ_END_CMD_RES, host->base + JZ_REG_MMC_IREG);
-
-handled:
- return ret;
+ return IRQ_HANDLED;
}
static int jz4740_mmc_set_clock_rate(struct jz4740_mmc_host *host, int rate)
@@ -565,6 +606,7 @@ static void jz4740_mmc_request(struct mm
writew(JZ_MMC_IRQ_END_CMD_RES, host->base + JZ_REG_MMC_IREG);
jz4740_mmc_set_irq_enabled(host, JZ_MMC_IRQ_END_CMD_RES, true);
+ host->state = JZ4740_MMC_STATE_READ_RESPONSE;
set_bit(0, &host->waiting);
mod_timer(&host->timeout_timer, jiffies + 5*HZ);
jz4740_mmc_send_command(host, req->cmd);
@@ -631,7 +673,7 @@ static irqreturn_t jz4740_mmc_card_detec
{
struct jz4740_mmc_host *host = devid;
- mmc_detect_change(host->mmc, HZ / 3);
+ mmc_detect_change(host->mmc, HZ / 2);
return IRQ_HANDLED;
}
@@ -659,6 +701,28 @@ static const struct jz_gpio_bulk_request
JZ_GPIO_BULK_PIN(MSC_DATA3),
};
+static int __devinit jz4740_mmc_request_gpio(struct device *dev, int gpio,
+ const char *name, bool output, int value)
+{
+ int ret;
+
+ if (!gpio_is_valid(gpio))
+ return 0;
+
+ ret = gpio_request(gpio, name);
+ if (ret) {
+ dev_err(dev, "Failed to request %s gpio: %d\n", name, ret);
+ return ret;
+ }
+
+ if (output)
+ gpio_direction_output(gpio, value);
+ else
+ gpio_direction_input(gpio);
+
+ return 0;
+}
+
static int __devinit jz4740_mmc_request_gpios(struct platform_device *pdev)
{
int ret;
@@ -667,32 +731,20 @@ static int __devinit jz4740_mmc_request_
if (!pdata)
return 0;
- if (gpio_is_valid(pdata->gpio_card_detect)) {
- ret = gpio_request(pdata->gpio_card_detect, "MMC detect
change");
- if (ret) {
- dev_err(&pdev->dev, "Failed to request detect change
gpio\n");
- goto err;
- }
- gpio_direction_input(pdata->gpio_card_detect);
- }
+ ret = jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_card_detect,
+ "MMC detect change", false, 0);
+ if (ret)
+ goto err;
- if (gpio_is_valid(pdata->gpio_read_only)) {
- ret = gpio_request(pdata->gpio_read_only, "MMC read only");
- if (ret) {
- dev_err(&pdev->dev, "Failed to request read only gpio:
%d\n", ret);
- goto err_free_gpio_card_detect;
- }
- gpio_direction_input(pdata->gpio_read_only);
- }
+ ret = jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_read_only,
+ "MMC read only", false, 0);
+ if (ret)
+ goto err_free_gpio_card_detect;
- if (gpio_is_valid(pdata->gpio_power)) {
- ret = gpio_request(pdata->gpio_power, "MMC power");
- if (ret) {
- dev_err(&pdev->dev, "Failed to request power gpio:
%d\n", ret);
- goto err_free_gpio_read_only;
- }
- gpio_direction_output(pdata->gpio_power,
pdata->power_active_low);
- }
+ ret = jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_power,
+ "MMC read only", true, pdata->power_active_low);
+ if (ret)
+ goto err_free_gpio_read_only;
return 0;
@@ -706,6 +758,29 @@ err:
return ret;
}
+static int __devinit jz4740_mmc_request_cd_irq(struct platform_device *pdev,
+ struct jz4740_mmc_host *host)
+{
+ int ret;
+ struct jz4740_mmc_platform_data *pdata = pdev->dev.platform_data;
+
+ if (gpio_is_valid(pdata->gpio_card_detect))
+ return 0;
+
+ host->card_detect_irq = gpio_to_irq(pdata->gpio_card_detect);
+
+ if (host->card_detect_irq < 0) {
+ dev_warn(&pdev->dev, "Failed to get card detect irq\n");
+ return 0;
+ }
+ return request_irq(host->card_detect_irq, jz4740_mmc_card_detect_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ "MMC card detect", host);
+
+
+ return ret;
+}
+
static void jz4740_mmc_free_gpios(struct platform_device *pdev)
{
struct jz4740_mmc_platform_data *pdata = pdev->dev.platform_data;
@@ -811,24 +886,13 @@ static int __devinit jz4740_mmc_probe(st
host->mmc = mmc;
host->pdev = pdev;
- host->max_clock = JZ_MMC_CLK_RATE;
spin_lock_init(&host->lock);
host->irq_mask = 0xffff;
- host->card_detect_irq = gpio_to_irq(pdata->gpio_card_detect);
-
- if (host->card_detect_irq < 0) {
- dev_warn(&pdev->dev, "Failed to get irq for card detect
gpio\n");
- } else {
- ret = request_irq(host->card_detect_irq,
- jz4740_mmc_card_detect_irq,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- "MMC card detect", host);
-
- if (ret) {
- dev_err(&pdev->dev, "Failed to request card detect
irq");
- goto err_free_gpios;
- }
+ ret = jz4740_mmc_request_cd_irq(pdev, host);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request card detect irq\n");
+ goto err_free_gpios;
}
ret = request_threaded_irq(host->irq, jz_mmc_irq, jz_mmc_irq_worker, 0,
@@ -842,7 +906,7 @@ static int __devinit jz4740_mmc_probe(st
jz4740_mmc_clock_disable(host);
setup_timer(&host->timeout_timer, jz4740_mmc_timeout,
(unsigned long)host);
- /* It is not that important when it times out, it just needs to
timeout. */
+ /* It is not important when it times out, it just needs to timeout. */
set_timer_slack(&host->timeout_timer, HZ);
platform_set_drvdata(pdev, host);
diff -puN include/linux/mmc/jz4740_mmc.h~mmc-add-jz4740-mmc-driver-v6 /dev/null
--- a/include/linux/mmc/jz4740_mmc.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef __LINUX_MMC_JZ4740_MMC
-#define __LINUX_MMC_JZ4740_MMC
-
-struct jz4740_mmc_platform_data {
- int gpio_power;
- int gpio_card_detect;
- int gpio_read_only;
- unsigned card_detect_active_low:1;
- unsigned read_only_active_low:1;
- unsigned power_active_low:1;
-
- unsigned data_1bit:1;
-};
-
-#endif
_
Patches currently in -mm which might be from l...@metafoo.de are
linux-next.patch
mmc-add-jz4740-mmc-driver.patch
mmc-add-jz4740-mmc-driver-v6.patch
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