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Message-Id: <1243279681-4233-3-git-send-email-philipp.zabel@gmail.com>
Date: Mon, 25 May 2009 21:27:58 +0200
From: Philipp Zabel <philipp.zabel@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Ian Molton <spyro@....com>,
Philipp Zabel <philipp.zabel@...il.com>,
Pierre Ossman <pierre@...man.eu>
Subject: [PATCH 2/5] mmc: tmio_mmc: add bus_shift support
Some ASIC3 devices in the wild are connected with the address bus shifted
by one line, so that its 16-bit registers appear 32-bit aligned in host
memory space.
Signed-off-by: Philipp Zabel <philipp.zabel@...il.com>
Cc: Pierre Ossman <pierre@...man.eu>
Cc: Ian Molton <spyro@....com>
---
drivers/mmc/host/tmio_mmc.c | 127 +++++++++++++++++++------------------------
drivers/mmc/host/tmio_mmc.h | 72 +++++++++++++++++++++---
2 files changed, 118 insertions(+), 81 deletions(-)
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index 9c488a8..245de05 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -37,8 +37,6 @@
static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)
{
- void __iomem *cnf = host->cnf;
- void __iomem *ctl = host->ctl;
u32 clk = 0, clock;
if (new_clock) {
@@ -50,45 +48,39 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)
clk = 0x20000;
clk >>= 2;
- tmio_iowrite8((clk & 0x8000) ? 0 : 1, cnf + CNF_SD_CLK_MODE);
+ sd_config_write8(host, CNF_SD_CLK_MODE, (clk & 0x8000) ? 0 : 1);
clk |= 0x100;
}
- tmio_iowrite16(clk, ctl + CTL_SD_CARD_CLK_CTL);
+ sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk);
}
static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
{
- void __iomem *ctl = host->ctl;
-
- tmio_iowrite16(0x0000, ctl + CTL_CLK_AND_WAIT_CTL);
+ sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
msleep(10);
- tmio_iowrite16(tmio_ioread16(ctl + CTL_SD_CARD_CLK_CTL) & ~0x0100,
- ctl + CTL_SD_CARD_CLK_CTL);
+ sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 &
+ sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
msleep(10);
}
static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
{
- void __iomem *ctl = host->ctl;
-
- tmio_iowrite16(tmio_ioread16(ctl + CTL_SD_CARD_CLK_CTL) | 0x0100,
- ctl + CTL_SD_CARD_CLK_CTL);
+ sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 |
+ sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
msleep(10);
- tmio_iowrite16(0x0100, ctl + CTL_CLK_AND_WAIT_CTL);
+ sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
msleep(10);
}
static void reset(struct tmio_mmc_host *host)
{
- void __iomem *ctl = host->ctl;
-
/* FIXME - should we set stop clock reg here */
- tmio_iowrite16(0x0000, ctl + CTL_RESET_SD);
- tmio_iowrite16(0x0000, ctl + CTL_RESET_SDIO);
+ sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
+ sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
msleep(10);
- tmio_iowrite16(0x0001, ctl + CTL_RESET_SD);
- tmio_iowrite16(0x0001, ctl + CTL_RESET_SDIO);
+ sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
+ sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
msleep(10);
}
@@ -120,13 +112,12 @@ tmio_mmc_finish_request(struct tmio_mmc_host *host)
static int
tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
{
- void __iomem *ctl = host->ctl;
struct mmc_data *data = host->data;
int c = cmd->opcode;
/* Command 12 is handled by hardware */
if (cmd->opcode == 12 && !cmd->arg) {
- tmio_iowrite16(0x001, ctl + CTL_STOP_INTERNAL_ACTION);
+ sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001);
return 0;
}
@@ -151,18 +142,18 @@ tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
if (data) {
c |= DATA_PRESENT;
if (data->blocks > 1) {
- tmio_iowrite16(0x100, ctl + CTL_STOP_INTERNAL_ACTION);
+ sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100);
c |= TRANSFER_MULTI;
}
if (data->flags & MMC_DATA_READ)
c |= TRANSFER_READ;
}
- enable_mmc_irqs(ctl, TMIO_MASK_CMD);
+ enable_mmc_irqs(host, TMIO_MASK_CMD);
/* Fire off the command */
- tmio_iowrite32(cmd->arg, ctl + CTL_ARG_REG);
- tmio_iowrite16(c, ctl + CTL_SD_CMD);
+ sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg);
+ sd_ctrl_write16(host, CTL_SD_CMD, c);
return 0;
}
@@ -174,7 +165,6 @@ tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
*/
static inline void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
{
- void __iomem *ctl = host->ctl;
struct mmc_data *data = host->data;
unsigned short *buf;
unsigned int count;
@@ -197,9 +187,9 @@ static inline void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
/* Transfer the data */
if (data->flags & MMC_DATA_READ)
- tmio_ioread16_rep(ctl + CTL_SD_DATA_PORT, buf, count >> 1);
+ sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
else
- tmio_iowrite16_rep(ctl + CTL_SD_DATA_PORT, buf, count >> 1);
+ sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
host->sg_off += count;
@@ -213,7 +203,6 @@ static inline void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
static inline void tmio_mmc_data_irq(struct tmio_mmc_host *host)
{
- void __iomem *ctl = host->ctl;
struct mmc_data *data = host->data;
struct mmc_command *stop;
@@ -242,13 +231,13 @@ static inline void tmio_mmc_data_irq(struct tmio_mmc_host *host)
*/
if (data->flags & MMC_DATA_READ)
- disable_mmc_irqs(ctl, TMIO_MASK_READOP);
+ disable_mmc_irqs(host, TMIO_MASK_READOP);
else
- disable_mmc_irqs(ctl, TMIO_MASK_WRITEOP);
+ disable_mmc_irqs(host, TMIO_MASK_WRITEOP);
if (stop) {
if (stop->opcode == 12 && !stop->arg)
- tmio_iowrite16(0x000, ctl + CTL_STOP_INTERNAL_ACTION);
+ sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000);
else
BUG();
}
@@ -259,9 +248,8 @@ static inline void tmio_mmc_data_irq(struct tmio_mmc_host *host)
static inline void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
unsigned int stat)
{
- void __iomem *ctl = host->ctl, *addr;
struct mmc_command *cmd = host->cmd;
- int i;
+ int i, addr;
if (!host->cmd) {
pr_debug("Spurious CMD irq\n");
@@ -275,8 +263,8 @@ static inline void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
* modify the order of the response for short response command types.
*/
- for (i = 3, addr = ctl + CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
- cmd->resp[i] = tmio_ioread32(addr);
+ for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
+ cmd->resp[i] = sd_ctrl_read32(host, addr);
if (cmd->flags & MMC_RSP_136) {
cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
@@ -298,9 +286,9 @@ static inline void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
*/
if (host->data && !cmd->error) {
if (host->data->flags & MMC_DATA_READ)
- enable_mmc_irqs(ctl, TMIO_MASK_READOP);
+ enable_mmc_irqs(host, TMIO_MASK_READOP);
else
- enable_mmc_irqs(ctl, TMIO_MASK_WRITEOP);
+ enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
} else {
tmio_mmc_finish_request(host);
}
@@ -312,20 +300,19 @@ static inline void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
static irqreturn_t tmio_mmc_irq(int irq, void *devid)
{
struct tmio_mmc_host *host = devid;
- void __iomem *ctl = host->ctl;
unsigned int ireg, irq_mask, status;
pr_debug("MMC IRQ begin\n");
- status = tmio_ioread32(ctl + CTL_STATUS);
- irq_mask = tmio_ioread32(ctl + CTL_IRQ_MASK);
+ status = sd_ctrl_read32(host, CTL_STATUS);
+ irq_mask = sd_ctrl_read32(host, CTL_IRQ_MASK);
ireg = status & TMIO_MASK_IRQ & ~irq_mask;
pr_debug_status(status);
pr_debug_status(ireg);
if (!ireg) {
- disable_mmc_irqs(ctl, status & ~irq_mask);
+ disable_mmc_irqs(host, status & ~irq_mask);
pr_debug("tmio_mmc: Spurious irq, disabling! "
"0x%08x 0x%08x 0x%08x\n", status, irq_mask, ireg);
@@ -337,7 +324,7 @@ static irqreturn_t tmio_mmc_irq(int irq, void *devid)
while (ireg) {
/* Card insert / remove attempts */
if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
- ack_mmc_irqs(ctl, TMIO_STAT_CARD_INSERT |
+ ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT |
TMIO_STAT_CARD_REMOVE);
mmc_detect_change(host->mmc, 0);
}
@@ -349,25 +336,25 @@ static irqreturn_t tmio_mmc_irq(int irq, void *devid)
/* Command completion */
if (ireg & TMIO_MASK_CMD) {
- ack_mmc_irqs(ctl, TMIO_MASK_CMD);
+ ack_mmc_irqs(host, TMIO_MASK_CMD);
tmio_mmc_cmd_irq(host, status);
}
/* Data transfer */
if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
- ack_mmc_irqs(ctl, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
+ ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
tmio_mmc_pio_irq(host);
}
/* Data transfer completion */
if (ireg & TMIO_STAT_DATAEND) {
- ack_mmc_irqs(ctl, TMIO_STAT_DATAEND);
+ ack_mmc_irqs(host, TMIO_STAT_DATAEND);
tmio_mmc_data_irq(host);
}
/* Check status - keep going until we've handled it all */
- status = tmio_ioread32(ctl + CTL_STATUS);
- irq_mask = tmio_ioread32(ctl + CTL_IRQ_MASK);
+ status = sd_ctrl_read32(host, CTL_STATUS);
+ irq_mask = sd_ctrl_read32(host, CTL_IRQ_MASK);
ireg = status & TMIO_MASK_IRQ & ~irq_mask;
pr_debug("Status at end of loop: %08x\n", status);
@@ -382,8 +369,6 @@ out:
static int tmio_mmc_start_data(struct tmio_mmc_host *host,
struct mmc_data *data)
{
- void __iomem *ctl = host->ctl;
-
pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n",
data->blksz, data->blocks);
@@ -398,8 +383,8 @@ static int tmio_mmc_start_data(struct tmio_mmc_host *host,
host->data = data;
/* Set transfer length / blocksize */
- tmio_iowrite16(data->blksz, ctl + CTL_SD_XFER_LEN);
- tmio_iowrite16(data->blocks, ctl + CTL_XFER_BLK_COUNT);
+ sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
+ sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
return 0;
}
@@ -440,8 +425,6 @@ fail:
static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct tmio_mmc_host *host = mmc_priv(mmc);
- void __iomem *cnf = host->cnf;
- void __iomem *ctl = host->ctl;
if (ios->clock)
tmio_mmc_set_clock(host, ios->clock);
@@ -449,12 +432,12 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
/* Power sequence - OFF -> ON -> UP */
switch (ios->power_mode) {
case MMC_POWER_OFF: /* power down SD bus */
- tmio_iowrite8(0x00, cnf + CNF_PWR_CTL_2);
+ sd_config_write8(host, CNF_PWR_CTL_2, 0x00);
tmio_mmc_clk_stop(host);
break;
case MMC_POWER_ON: /* power up SD bus */
- tmio_iowrite8(0x02, cnf + CNF_PWR_CTL_2);
+ sd_config_write8(host, CNF_PWR_CTL_2, 0x02);
break;
case MMC_POWER_UP: /* start bus clock */
tmio_mmc_clk_start(host);
@@ -463,10 +446,10 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
switch (ios->bus_width) {
case MMC_BUS_WIDTH_1:
- tmio_iowrite16(0x80e0, ctl + CTL_SD_MEM_CARD_OPT);
+ sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
break;
case MMC_BUS_WIDTH_4:
- tmio_iowrite16(0x00e0, ctl + CTL_SD_MEM_CARD_OPT);
+ sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
break;
}
@@ -477,9 +460,8 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
static int tmio_mmc_get_ro(struct mmc_host *mmc)
{
struct tmio_mmc_host *host = mmc_priv(mmc);
- void __iomem *ctl = host->ctl;
- return (tmio_ioread16(ctl + CTL_STATUS) & TMIO_STAT_WRPROTECT) ? 0 : 1;
+ return (sd_ctrl_read16(host, CTL_STATUS) & TMIO_STAT_WRPROTECT) ? 0 : 1;
}
static struct mmc_host_ops tmio_mmc_ops = {
@@ -509,12 +491,11 @@ static int tmio_mmc_resume(struct platform_device *dev)
struct mfd_cell *cell = (struct mfd_cell *)dev->dev.platform_data;
struct mmc_host *mmc = platform_get_drvdata(dev);
struct tmio_mmc_host *host = mmc_priv(mmc);
- void __iomem *cnf = host->cnf;
int ret = 0;
/* Enable the MMC/SD Control registers */
- tmio_iowrite16(SDCREN, cnf + CNF_CMD);
- tmio_iowrite32(dev->resource[0].start & 0xfffe, cnf + CNF_CTL_BASE);
+ sd_config_write16(host, CNF_CMD, SDCREN);
+ sd_config_write32(host, CNF_CTL_BASE, dev->resource[0].start & 0xfffe);
/* Tell the MFD core we are ready to be enabled */
if (cell->enable) {
@@ -566,6 +547,9 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev)
host->mmc = mmc;
platform_set_drvdata(dev, mmc);
+ /* SD control register space size is 0x200, 0x400 for bus_shift=1 */
+ host->bus_shift = resource_size(res_ctl) >> 10;
+
host->ctl = ioremap(res_ctl->start, resource_size(res_ctl));
if (!host->ctl)
goto host_free;
@@ -581,9 +565,8 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev)
mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
/* Enable the MMC/SD Control registers */
- tmio_iowrite16(SDCREN, host->cnf + CNF_CMD);
- tmio_iowrite32(dev->resource[0].start & 0xfffe,
- host->cnf + CNF_CTL_BASE);
+ sd_config_write16(host, CNF_CMD, SDCREN);
+ sd_config_write32(host, CNF_CTL_BASE, dev->resource[0].start & 0xfffe);
/* Tell the MFD core we are ready to be enabled */
if (cell->enable) {
@@ -593,13 +576,13 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev)
}
/* Disable SD power during suspend */
- tmio_iowrite8(0x01, host->cnf + CNF_PWR_CTL_3);
+ sd_config_write8(host, CNF_PWR_CTL_3, 0x01);
/* The below is required but why? FIXME */
- tmio_iowrite8(0x1f, host->cnf + CNF_STOP_CLK_CTL);
+ sd_config_write8(host, CNF_STOP_CLK_CTL, 0x1f);
/* Power down SD bus*/
- tmio_iowrite8(0x0, host->cnf + CNF_PWR_CTL_2);
+ sd_config_write8(host, CNF_PWR_CTL_2, 0x00);
tmio_mmc_clk_stop(host);
reset(host);
@@ -610,7 +593,7 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev)
else
goto unmap_cnf;
- disable_mmc_irqs(host->ctl, TMIO_MASK_ALL);
+ disable_mmc_irqs(host, TMIO_MASK_ALL);
ret = request_irq(host->irq, tmio_mmc_irq, IRQF_DISABLED, "tmio-mmc",
host);
@@ -625,7 +608,7 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev)
(unsigned long)host->ctl, host->irq);
/* Unmask the IRQs we want to know about */
- enable_mmc_irqs(host->ctl, TMIO_MASK_IRQ);
+ enable_mmc_irqs(host, TMIO_MASK_IRQ);
return 0;
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 9c831ab..9b97afa 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -83,34 +83,36 @@
TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
-#define enable_mmc_irqs(ctl, i) \
+
+#define enable_mmc_irqs(host, i) \
do { \
u32 mask;\
- mask = tmio_ioread32((ctl) + CTL_IRQ_MASK); \
+ mask = sd_ctrl_read32((host), CTL_IRQ_MASK); \
mask &= ~((i) & TMIO_MASK_IRQ); \
- tmio_iowrite32(mask, (ctl) + CTL_IRQ_MASK); \
+ sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
} while (0)
-#define disable_mmc_irqs(ctl, i) \
+#define disable_mmc_irqs(host, i) \
do { \
u32 mask;\
- mask = tmio_ioread32((ctl) + CTL_IRQ_MASK); \
+ mask = sd_ctrl_read32((host), CTL_IRQ_MASK); \
mask |= ((i) & TMIO_MASK_IRQ); \
- tmio_iowrite32(mask, (ctl) + CTL_IRQ_MASK); \
+ sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
} while (0)
-#define ack_mmc_irqs(ctl, i) \
+#define ack_mmc_irqs(host, i) \
do { \
u32 mask;\
- mask = tmio_ioread32((ctl) + CTL_STATUS); \
+ mask = sd_ctrl_read32((host), CTL_STATUS); \
mask &= ~((i) & TMIO_MASK_IRQ); \
- tmio_iowrite32(mask, (ctl) + CTL_STATUS); \
+ sd_ctrl_write32((host), CTL_STATUS, mask); \
} while (0)
struct tmio_mmc_host {
void __iomem *cnf;
void __iomem *ctl;
+ unsigned long bus_shift;
struct mmc_command *cmd;
struct mmc_request *mrq;
struct mmc_data *data;
@@ -123,6 +125,58 @@ struct tmio_mmc_host {
unsigned int sg_off;
};
+#include <linux/io.h>
+
+static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
+{
+ return readw(host->ctl + (addr << host->bus_shift));
+}
+
+static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
+ u16 *buf, int count)
+{
+ readsw(host->ctl + (addr << host->bus_shift), buf, count);
+}
+
+static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
+{
+ return readw(host->ctl + (addr << host->bus_shift)) |
+ readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
+}
+
+static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
+{
+ writew(val, host->ctl + (addr << host->bus_shift));
+}
+
+static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
+ u16 *buf, int count)
+{
+ writesw(host->ctl + (addr << host->bus_shift), buf, count);
+}
+
+static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
+{
+ writew(val, host->ctl + (addr << host->bus_shift));
+ writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
+}
+
+static inline void sd_config_write8(struct tmio_mmc_host *host, int addr, u8 val)
+{
+ writeb(val, host->cnf + (addr << host->bus_shift));
+}
+
+static inline void sd_config_write16(struct tmio_mmc_host *host, int addr, u16 val)
+{
+ writew(val, host->cnf + (addr << host->bus_shift));
+}
+
+static inline void sd_config_write32(struct tmio_mmc_host *host, int addr, u32 val)
+{
+ writew(val, host->cnf + (addr << host->bus_shift));
+ writew(val >> 16, host->cnf + ((addr + 2) << host->bus_shift));
+}
+
#include <linux/scatterlist.h>
#include <linux/blkdev.h>
--
1.6.3.1
--
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