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mmc: mxcmmc: add mpc512x SDHC support

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The SDHC controller on mpc512x is compatible with i.MX31 SDHC,
so the mxcmmc driver can be used on mpc512x, too. Extend the
driver to support mpc512x as well.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Anatolij Gustschin 2013-04-08 23:28:06 +02:00 committed by Chris Ball
parent 70aa610959
commit c7ceab0254
2 changed files with 94 additions and 49 deletions
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10
drivers/mmc/host/Kconfig
View File

@ -320,12 +320,12 @@ config MMC_MSM
support for SDIO devices.
config MMC_MXC
tristate "Freescale i.MX21/27/31 Multimedia Card Interface support"
depends on ARCH_MXC
tristate "Freescale i.MX21/27/31 or MPC512x Multimedia Card support"
depends on ARCH_MXC || PPC_MPC512x
help
This selects the Freescale i.MX21, i.MX27 and i.MX31 Multimedia card
Interface. If you have a i.MX platform with a Multimedia Card slot,
say Y or M here.
This selects the Freescale i.MX21, i.MX27, i.MX31 or MPC512x
Multimedia Card Interface. If you have an i.MX or MPC512x platform
with a Multimedia Card slot, say Y or M here.
If unsure, say N.

133
drivers/mmc/host/mxcmmc.c
View File

@ -41,7 +41,6 @@
#include <asm/dma.h>
#include <asm/irq.h>
#include <asm/sizes.h>
#include <linux/platform_data/mmc-mxcmmc.h>
#include <linux/platform_data/dma-imx.h>
@ -119,6 +118,7 @@
enum mxcmci_type {
IMX21_MMC,
IMX31_MMC,
MPC512X_MMC,
};
struct mxcmci_host {
@ -171,6 +171,9 @@ static struct platform_device_id mxcmci_devtype[] = {
}, {
.name = "imx31-mmc",
.driver_data = IMX31_MMC,
}, {
.name = "mpc512x-sdhc",
.driver_data = MPC512X_MMC,
}, {
/* sentinel */
}
@ -184,6 +187,9 @@ static const struct of_device_id mxcmci_of_match[] = {
}, {
.compatible = "fsl,imx31-mmc",
.data = &mxcmci_devtype[IMX31_MMC],
}, {
.compatible = "fsl,mpc5121-sdhc",
.data = &mxcmci_devtype[MPC512X_MMC],
}, {
/* sentinel */
}
@ -195,6 +201,43 @@ static inline int is_imx31_mmc(struct mxcmci_host *host)
return host->devtype == IMX31_MMC;
}
static inline int is_mpc512x_mmc(struct mxcmci_host *host)
{
return host->devtype == MPC512X_MMC;
}
static inline u32 mxcmci_readl(struct mxcmci_host *host, int reg)
{
if (IS_ENABLED(CONFIG_PPC_MPC512x))
return ioread32be(host->base + reg);
else
return readl(host->base + reg);
}
static inline void mxcmci_writel(struct mxcmci_host *host, u32 val, int reg)
{
if (IS_ENABLED(CONFIG_PPC_MPC512x))
iowrite32be(val, host->base + reg);
else
writel(val, host->base + reg);
}
static inline u16 mxcmci_readw(struct mxcmci_host *host, int reg)
{
if (IS_ENABLED(CONFIG_PPC_MPC512x))
return ioread32be(host->base + reg);
else
return readw(host->base + reg);
}
static inline void mxcmci_writew(struct mxcmci_host *host, u16 val, int reg)
{
if (IS_ENABLED(CONFIG_PPC_MPC512x))
iowrite32be(val, host->base + reg);
else
writew(val, host->base + reg);
}
static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios);
static inline void mxcmci_init_ocr(struct mxcmci_host *host)
@ -246,14 +289,14 @@ static void mxcmci_softreset(struct mxcmci_host *host)
dev_dbg(mmc_dev(host->mmc), "mxcmci_softreset\n");
/* reset sequence */
writew(STR_STP_CLK_RESET, host->base + MMC_REG_STR_STP_CLK);
writew(STR_STP_CLK_RESET | STR_STP_CLK_START_CLK,
host->base + MMC_REG_STR_STP_CLK);
mxcmci_writew(host, STR_STP_CLK_RESET, MMC_REG_STR_STP_CLK);
mxcmci_writew(host, STR_STP_CLK_RESET | STR_STP_CLK_START_CLK,
MMC_REG_STR_STP_CLK);
for (i = 0; i < 8; i++)
writew(STR_STP_CLK_START_CLK, host->base + MMC_REG_STR_STP_CLK);
mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK);
writew(0xff, host->base + MMC_REG_RES_TO);
mxcmci_writew(host, 0xff, MMC_REG_RES_TO);
}
static int mxcmci_setup_dma(struct mmc_host *mmc);
@ -272,8 +315,8 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
host->data = data;
data->bytes_xfered = 0;
writew(nob, host->base + MMC_REG_NOB);
writew(blksz, host->base + MMC_REG_BLK_LEN);
mxcmci_writew(host, nob, MMC_REG_NOB);
mxcmci_writew(host, blksz, MMC_REG_BLK_LEN);
host->datasize = datasize;
if (!mxcmci_use_dma(host))
@ -329,13 +372,13 @@ static void mxcmci_dma_callback(void *data)
del_timer(&host->watchdog);
stat = readl(host->base + MMC_REG_STATUS);
writel(stat & ~STATUS_DATA_TRANS_DONE, host->base + MMC_REG_STATUS);
stat = mxcmci_readl(host, MMC_REG_STATUS);
mxcmci_writel(host, stat & ~STATUS_DATA_TRANS_DONE, MMC_REG_STATUS);
dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat);
if (stat & STATUS_READ_OP_DONE)
writel(STATUS_READ_OP_DONE, host->base + MMC_REG_STATUS);
mxcmci_writel(host, STATUS_READ_OP_DONE, MMC_REG_STATUS);
mxcmci_data_done(host, stat);
}
@ -383,12 +426,12 @@ static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd,
spin_lock_irqsave(&host->lock, flags);
if (host->use_sdio)
int_cntr |= INT_SDIO_IRQ_EN;
writel(int_cntr, host->base + MMC_REG_INT_CNTR);
mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR);
spin_unlock_irqrestore(&host->lock, flags);
writew(cmd->opcode, host->base + MMC_REG_CMD);
writel(cmd->arg, host->base + MMC_REG_ARG);
writew(cmdat, host->base + MMC_REG_CMD_DAT_CONT);
mxcmci_writew(host, cmd->opcode, MMC_REG_CMD);
mxcmci_writel(host, cmd->arg, MMC_REG_ARG);
mxcmci_writew(host, cmdat, MMC_REG_CMD_DAT_CONT);
return 0;
}
@ -402,7 +445,7 @@ static void mxcmci_finish_request(struct mxcmci_host *host,
spin_lock_irqsave(&host->lock, flags);
if (host->use_sdio)
int_cntr |= INT_SDIO_IRQ_EN;
writel(int_cntr, host->base + MMC_REG_INT_CNTR);
mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR);
spin_unlock_irqrestore(&host->lock, flags);
host->req = NULL;
@ -477,14 +520,14 @@ static void mxcmci_read_response(struct mxcmci_host *host, unsigned int stat)
if (cmd->flags & MMC_RSP_PRESENT) {
if (cmd->flags & MMC_RSP_136) {
for (i = 0; i < 4; i++) {
a = readw(host->base + MMC_REG_RES_FIFO);
b = readw(host->base + MMC_REG_RES_FIFO);
a = mxcmci_readw(host, MMC_REG_RES_FIFO);
b = mxcmci_readw(host, MMC_REG_RES_FIFO);
cmd->resp[i] = a << 16 | b;
}
} else {
a = readw(host->base + MMC_REG_RES_FIFO);
b = readw(host->base + MMC_REG_RES_FIFO);
c = readw(host->base + MMC_REG_RES_FIFO);
a = mxcmci_readw(host, MMC_REG_RES_FIFO);
b = mxcmci_readw(host, MMC_REG_RES_FIFO);
c = mxcmci_readw(host, MMC_REG_RES_FIFO);
cmd->resp[0] = a << 24 | b << 8 | c >> 8;
}
}
@ -496,7 +539,7 @@ static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask)
unsigned long timeout = jiffies + HZ;
do {
stat = readl(host->base + MMC_REG_STATUS);
stat = mxcmci_readl(host, MMC_REG_STATUS);
if (stat & STATUS_ERR_MASK)
return stat;
if (time_after(jiffies, timeout)) {
@ -520,7 +563,7 @@ static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes)
STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE);
if (stat)
return stat;
*buf++ = readl(host->base + MMC_REG_BUFFER_ACCESS);
*buf++ = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS));
bytes -= 4;
}
@ -532,7 +575,7 @@ static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes)
STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE);
if (stat)
return stat;
tmp = readl(host->base + MMC_REG_BUFFER_ACCESS);
tmp = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS));
memcpy(b, &tmp, bytes);
}
@ -548,7 +591,7 @@ static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes)
stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY);
if (stat)
return stat;
writel(*buf++, host->base + MMC_REG_BUFFER_ACCESS);
mxcmci_writel(host, cpu_to_le32(*buf++), MMC_REG_BUFFER_ACCESS);
bytes -= 4;
}
@ -561,7 +604,7 @@ static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes)
return stat;
memcpy(&tmp, b, bytes);
writel(tmp, host->base + MMC_REG_BUFFER_ACCESS);
mxcmci_writel(host, cpu_to_le32(tmp), MMC_REG_BUFFER_ACCESS);
}
stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY);
@ -607,8 +650,8 @@ static void mxcmci_datawork(struct work_struct *work)
datawork);
int datastat = mxcmci_transfer_data(host);
writel(STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE,
host->base + MMC_REG_STATUS);
mxcmci_writel(host, STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE,
MMC_REG_STATUS);
mxcmci_finish_data(host, datastat);
if (host->req->stop) {
@ -686,9 +729,11 @@ static irqreturn_t mxcmci_irq(int irq, void *devid)
bool sdio_irq;
u32 stat;
stat = readl(host->base + MMC_REG_STATUS);
writel(stat & ~(STATUS_SDIO_INT_ACTIVE | STATUS_DATA_TRANS_DONE |
STATUS_WRITE_OP_DONE), host->base + MMC_REG_STATUS);
stat = mxcmci_readl(host, MMC_REG_STATUS);
mxcmci_writel(host,
stat & ~(STATUS_SDIO_INT_ACTIVE | STATUS_DATA_TRANS_DONE |
STATUS_WRITE_OP_DONE),
MMC_REG_STATUS);
dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat);
@ -698,11 +743,11 @@ static irqreturn_t mxcmci_irq(int irq, void *devid)
if (mxcmci_use_dma(host) &&
(stat & (STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE)))
writel(STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE,
host->base + MMC_REG_STATUS);
mxcmci_writel(host, STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE,
MMC_REG_STATUS);
if (sdio_irq) {
writel(STATUS_SDIO_INT_ACTIVE, host->base + MMC_REG_STATUS);
mxcmci_writel(host, STATUS_SDIO_INT_ACTIVE, MMC_REG_STATUS);
mmc_signal_sdio_irq(host->mmc);
}
@ -784,7 +829,7 @@ static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios)
prescaler <<= 1;
}
writew((prescaler << 4) | divider, host->base + MMC_REG_CLK_RATE);
mxcmci_writew(host, (prescaler << 4) | divider, MMC_REG_CLK_RATE);
dev_dbg(mmc_dev(host->mmc), "scaler: %d divider: %d in: %d out: %d\n",
prescaler, divider, clk_in, clk_ios);
@ -847,9 +892,9 @@ static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
if (ios->clock) {
mxcmci_set_clk_rate(host, ios->clock);
writew(STR_STP_CLK_START_CLK, host->base + MMC_REG_STR_STP_CLK);
mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK);
} else {
writew(STR_STP_CLK_STOP_CLK, host->base + MMC_REG_STR_STP_CLK);
mxcmci_writew(host, STR_STP_CLK_STOP_CLK, MMC_REG_STR_STP_CLK);
}
host->clock = ios->clock;
@ -886,14 +931,14 @@ static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable)
spin_lock_irqsave(&host->lock, flags);
host->use_sdio = enable;
int_cntr = readl(host->base + MMC_REG_INT_CNTR);
int_cntr = mxcmci_readl(host, MMC_REG_INT_CNTR);
if (enable)
int_cntr |= INT_SDIO_IRQ_EN;
else
int_cntr &= ~INT_SDIO_IRQ_EN;
writel(int_cntr, host->base + MMC_REG_INT_CNTR);
mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR);
spin_unlock_irqrestore(&host->lock, flags);
}
@ -931,7 +976,7 @@ static void mxcmci_watchdog(unsigned long data)
struct mmc_host *mmc = (struct mmc_host *)data;
struct mxcmci_host *host = mmc_priv(mmc);
struct mmc_request *req = host->req;
unsigned int stat = readl(host->base + MMC_REG_STATUS);
unsigned int stat = mxcmci_readl(host, MMC_REG_STATUS);
if (host->dma_dir == DMA_FROM_DEVICE) {
dmaengine_terminate_all(host->dma);
@ -974,7 +1019,7 @@ static int mxcmci_probe(struct platform_device *pdev)
const struct of_device_id *of_id;
struct imxmmc_platform_data *pdata = pdev->dev.platform_data;
pr_info("i.MX SDHC driver\n");
pr_info("i.MX/MPC512x SDHC driver\n");
of_id = of_match_device(mxcmci_of_match, &pdev->dev);
@ -1060,7 +1105,7 @@ static int mxcmci_probe(struct platform_device *pdev)
mxcmci_softreset(host);
host->rev_no = readw(host->base + MMC_REG_REV_NO);
host->rev_no = mxcmci_readw(host, MMC_REG_REV_NO);
if (host->rev_no != 0x400) {
ret = -ENODEV;
dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n",
@ -1072,9 +1117,9 @@ static int mxcmci_probe(struct platform_device *pdev)
mmc->f_max = clk_get_rate(host->clk_per) >> 1;
/* recommended in data sheet */
writew(0x2db4, host->base + MMC_REG_READ_TO);
mxcmci_writew(host, 0x2db4, MMC_REG_READ_TO);
writel(host->default_irq_mask, host->base + MMC_REG_INT_CNTR);
mxcmci_writel(host, host->default_irq_mask, MMC_REG_INT_CNTR);
if (!host->pdata) {
host->dma = dma_request_slave_channel(&pdev->dev, "rx-tx");