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authorMarek Vasut <marex@denx.de>2012-08-03 17:26:09 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-08-17 22:52:51 +0100
commit829c1bf40b926a86e545733f6252262add3abe39 (patch)
tree8d94e9dc8ccc86a7f2cf9d1a72fae88efc9209c2 /drivers/mmc
parentf83b73806579c666fe6f1a4ed4800092c89e81db (diff)
downloadlinux-linaro-stable-829c1bf40b926a86e545733f6252262add3abe39.tar.gz
mmc: spi: Pull out parts shared between MMC and SPI
Abstract out the common part of private data shared between MMC and SPI. These shall later allow to use common clock configuration function. Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Chris Ball <cjb@laptop.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/mxs-mmc.c107
1 files changed, 59 insertions, 48 deletions
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index e80c2b6b2d7c..7b85e035a4cb 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -62,23 +62,20 @@
#define MXS_MMC_DETECT_TIMEOUT (HZ/2)
struct mxs_mmc_host {
+ struct mxs_ssp ssp;
+
struct mmc_host *mmc;
struct mmc_request *mrq;
struct mmc_command *cmd;
struct mmc_data *data;
- void __iomem *base;
int dma_channel;
- struct clk *clk;
- unsigned int clk_rate;
-
struct dma_chan *dmach;
struct mxs_dma_data dma_data;
unsigned int dma_dir;
enum dma_transfer_direction slave_dirn;
u32 ssp_pio_words[SSP_PIO_NUM];
- enum mxs_ssp_id devid;
unsigned char bus_width;
spinlock_t lock;
int sdio_irq_en;
@@ -105,16 +102,18 @@ static int mxs_mmc_get_ro(struct mmc_host *mmc)
static int mxs_mmc_get_cd(struct mmc_host *mmc)
{
struct mxs_mmc_host *host = mmc_priv(mmc);
+ struct mxs_ssp *ssp = &host->ssp;
- return !(readl(host->base + HW_SSP_STATUS(host)) &
+ return !(readl(ssp->base + HW_SSP_STATUS(ssp)) &
BM_SSP_STATUS_CARD_DETECT);
}
static void mxs_mmc_reset(struct mxs_mmc_host *host)
{
+ struct mxs_ssp *ssp = &host->ssp;
u32 ctrl0, ctrl1;
- stmp_reset_block(host->base);
+ stmp_reset_block(ssp->base);
ctrl0 = BM_SSP_CTRL0_IGNORE_CRC;
ctrl1 = BF_SSP(0x3, CTRL1_SSP_MODE) |
@@ -130,15 +129,15 @@ static void mxs_mmc_reset(struct mxs_mmc_host *host)
writel(BF_SSP(0xffff, TIMING_TIMEOUT) |
BF_SSP(2, TIMING_CLOCK_DIVIDE) |
BF_SSP(0, TIMING_CLOCK_RATE),
- host->base + HW_SSP_TIMING(host));
+ ssp->base + HW_SSP_TIMING(ssp));
if (host->sdio_irq_en) {
ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
ctrl1 |= BM_SSP_CTRL1_SDIO_IRQ_EN;
}
- writel(ctrl0, host->base + HW_SSP_CTRL0);
- writel(ctrl1, host->base + HW_SSP_CTRL1(host));
+ writel(ctrl0, ssp->base + HW_SSP_CTRL0);
+ writel(ctrl1, ssp->base + HW_SSP_CTRL1(ssp));
}
static void mxs_mmc_start_cmd(struct mxs_mmc_host *host,
@@ -149,15 +148,16 @@ static void mxs_mmc_request_done(struct mxs_mmc_host *host)
struct mmc_command *cmd = host->cmd;
struct mmc_data *data = host->data;
struct mmc_request *mrq = host->mrq;
+ struct mxs_ssp *ssp = &host->ssp;
if (mmc_resp_type(cmd) & MMC_RSP_PRESENT) {
if (mmc_resp_type(cmd) & MMC_RSP_136) {
- cmd->resp[3] = readl(host->base + HW_SSP_SDRESP0(host));
- cmd->resp[2] = readl(host->base + HW_SSP_SDRESP1(host));
- cmd->resp[1] = readl(host->base + HW_SSP_SDRESP2(host));
- cmd->resp[0] = readl(host->base + HW_SSP_SDRESP3(host));
+ cmd->resp[3] = readl(ssp->base + HW_SSP_SDRESP0(ssp));
+ cmd->resp[2] = readl(ssp->base + HW_SSP_SDRESP1(ssp));
+ cmd->resp[1] = readl(ssp->base + HW_SSP_SDRESP2(ssp));
+ cmd->resp[0] = readl(ssp->base + HW_SSP_SDRESP3(ssp));
} else {
- cmd->resp[0] = readl(host->base + HW_SSP_SDRESP0(host));
+ cmd->resp[0] = readl(ssp->base + HW_SSP_SDRESP0(ssp));
}
}
@@ -196,13 +196,14 @@ static irqreturn_t mxs_mmc_irq_handler(int irq, void *dev_id)
struct mxs_mmc_host *host = dev_id;
struct mmc_command *cmd = host->cmd;
struct mmc_data *data = host->data;
+ struct mxs_ssp *ssp = &host->ssp;
u32 stat;
spin_lock(&host->lock);
- stat = readl(host->base + HW_SSP_CTRL1(host));
+ stat = readl(ssp->base + HW_SSP_CTRL1(ssp));
writel(stat & MXS_MMC_IRQ_BITS,
- host->base + HW_SSP_CTRL1(host) + STMP_OFFSET_REG_CLR);
+ ssp->base + HW_SSP_CTRL1(ssp) + STMP_OFFSET_REG_CLR);
if ((stat & BM_SSP_CTRL1_SDIO_IRQ) && (stat & BM_SSP_CTRL1_SDIO_IRQ_EN))
mmc_signal_sdio_irq(host->mmc);
@@ -366,6 +367,8 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
unsigned int data_size = 0, log2_blksz;
unsigned int blocks = data->blocks;
+ struct mxs_ssp *ssp = &host->ssp;
+
u32 ignore_crc, get_resp, long_resp, read;
u32 ctrl0, cmd0, cmd1, val;
@@ -408,15 +411,15 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
blocks = 1;
/* xfer count, block size and count need to be set differently */
- if (ssp_is_old(host)) {
+ if (ssp_is_old(ssp)) {
ctrl0 |= BF_SSP(data_size, CTRL0_XFER_COUNT);
cmd0 |= BF_SSP(log2_blksz, CMD0_BLOCK_SIZE) |
BF_SSP(blocks - 1, CMD0_BLOCK_COUNT);
} else {
- writel(data_size, host->base + HW_SSP_XFER_SIZE);
+ writel(data_size, ssp->base + HW_SSP_XFER_SIZE);
writel(BF_SSP(log2_blksz, BLOCK_SIZE_BLOCK_SIZE) |
BF_SSP(blocks - 1, BLOCK_SIZE_BLOCK_COUNT),
- host->base + HW_SSP_BLOCK_SIZE);
+ ssp->base + HW_SSP_BLOCK_SIZE);
}
if ((cmd->opcode == MMC_STOP_TRANSMISSION) ||
@@ -431,11 +434,11 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
}
/* set the timeout count */
- timeout = mxs_ns_to_ssp_ticks(host->clk_rate, data->timeout_ns);
- val = readl(host->base + HW_SSP_TIMING(host));
+ timeout = mxs_ns_to_ssp_ticks(ssp->clk_rate, data->timeout_ns);
+ val = readl(ssp->base + HW_SSP_TIMING(ssp));
val &= ~(BM_SSP_TIMING_TIMEOUT);
val |= BF_SSP(timeout, TIMING_TIMEOUT);
- writel(val, host->base + HW_SSP_TIMING(host));
+ writel(val, ssp->base + HW_SSP_TIMING(ssp));
/* pio */
host->ssp_pio_words[0] = ctrl0;
@@ -500,11 +503,12 @@ static void mxs_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
static void mxs_mmc_set_clk_rate(struct mxs_mmc_host *host, unsigned int rate)
{
+ struct mxs_ssp *ssp = &host->ssp;
unsigned int ssp_clk, ssp_sck;
u32 clock_divide, clock_rate;
u32 val;
- ssp_clk = clk_get_rate(host->clk);
+ ssp_clk = clk_get_rate(ssp->clk);
for (clock_divide = 2; clock_divide <= 254; clock_divide += 2) {
clock_rate = DIV_ROUND_UP(ssp_clk, rate * clock_divide);
@@ -521,13 +525,13 @@ static void mxs_mmc_set_clk_rate(struct mxs_mmc_host *host, unsigned int rate)
ssp_sck = ssp_clk / clock_divide / (1 + clock_rate);
- val = readl(host->base + HW_SSP_TIMING(host));
+ val = readl(ssp->base + HW_SSP_TIMING(ssp));
val &= ~(BM_SSP_TIMING_CLOCK_DIVIDE | BM_SSP_TIMING_CLOCK_RATE);
val |= BF_SSP(clock_divide, TIMING_CLOCK_DIVIDE);
val |= BF_SSP(clock_rate, TIMING_CLOCK_RATE);
- writel(val, host->base + HW_SSP_TIMING(host));
+ writel(val, ssp->base + HW_SSP_TIMING(ssp));
- host->clk_rate = ssp_sck;
+ ssp->clk_rate = ssp_sck;
dev_dbg(mmc_dev(host->mmc),
"%s: clock_divide %d, clock_rate %d, ssp_clk %d, rate_actual %d, rate_requested %d\n",
@@ -552,6 +556,7 @@ static void mxs_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
static void mxs_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
{
struct mxs_mmc_host *host = mmc_priv(mmc);
+ struct mxs_ssp *ssp = &host->ssp;
unsigned long flags;
spin_lock_irqsave(&host->lock, flags);
@@ -560,19 +565,19 @@ static void mxs_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
if (enable) {
writel(BM_SSP_CTRL0_SDIO_IRQ_CHECK,
- host->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_SET);
+ ssp->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_SET);
writel(BM_SSP_CTRL1_SDIO_IRQ_EN,
- host->base + HW_SSP_CTRL1(host) + STMP_OFFSET_REG_SET);
+ ssp->base + HW_SSP_CTRL1(ssp) + STMP_OFFSET_REG_SET);
- if (readl(host->base + HW_SSP_STATUS(host)) &
+ if (readl(ssp->base + HW_SSP_STATUS(ssp)) &
BM_SSP_STATUS_SDIO_IRQ)
mmc_signal_sdio_irq(host->mmc);
} else {
writel(BM_SSP_CTRL0_SDIO_IRQ_CHECK,
- host->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_CLR);
+ ssp->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_CLR);
writel(BM_SSP_CTRL1_SDIO_IRQ_EN,
- host->base + HW_SSP_CTRL1(host) + STMP_OFFSET_REG_CLR);
+ ssp->base + HW_SSP_CTRL1(ssp) + STMP_OFFSET_REG_CLR);
}
spin_unlock_irqrestore(&host->lock, flags);
@@ -635,6 +640,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
dma_cap_mask_t mask;
struct regulator *reg_vmmc;
enum of_gpio_flags flags;
+ struct mxs_ssp *ssp;
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
@@ -648,14 +654,16 @@ static int mxs_mmc_probe(struct platform_device *pdev)
return -ENOMEM;
host = mmc_priv(mmc);
- host->base = devm_request_and_ioremap(&pdev->dev, iores);
- if (!host->base) {
+ ssp = &host->ssp;
+ ssp->dev = &pdev->dev;
+ ssp->base = devm_request_and_ioremap(&pdev->dev, iores);
+ if (!ssp->base) {
ret = -EADDRNOTAVAIL;
goto out_mmc_free;
}
if (np) {
- host->devid = (enum mxs_ssp_id) of_id->data;
+ ssp->devid = (enum mxs_ssp_id) of_id->data;
/*
* TODO: This is a temporary solution and should be changed
* to use generic DMA binding later when the helpers get in.
@@ -668,7 +676,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
goto out_mmc_free;
}
} else {
- host->devid = pdev->id_entry->driver_data;
+ ssp->devid = pdev->id_entry->driver_data;
host->dma_channel = dmares->start;
}
@@ -691,12 +699,12 @@ static int mxs_mmc_probe(struct platform_device *pdev)
goto out_mmc_free;
}
- host->clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(host->clk)) {
- ret = PTR_ERR(host->clk);
+ ssp->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(ssp->clk)) {
+ ret = PTR_ERR(ssp->clk);
goto out_mmc_free;
}
- clk_prepare_enable(host->clk);
+ clk_prepare_enable(ssp->clk);
mxs_mmc_reset(host);
@@ -741,8 +749,8 @@ static int mxs_mmc_probe(struct platform_device *pdev)
mmc->max_segs = 52;
mmc->max_blk_size = 1 << 0xf;
- mmc->max_blk_count = (ssp_is_old(host)) ? 0xff : 0xffffff;
- mmc->max_req_size = (ssp_is_old(host)) ? 0xffff : 0xffffffff;
+ mmc->max_blk_count = (ssp_is_old(ssp)) ? 0xff : 0xffffff;
+ mmc->max_req_size = (ssp_is_old(ssp)) ? 0xffff : 0xffffffff;
mmc->max_seg_size = dma_get_max_seg_size(host->dmach->device->dev);
platform_set_drvdata(pdev, mmc);
@@ -766,8 +774,8 @@ out_free_dma:
if (host->dmach)
dma_release_channel(host->dmach);
out_clk_put:
- clk_disable_unprepare(host->clk);
- clk_put(host->clk);
+ clk_disable_unprepare(ssp->clk);
+ clk_put(ssp->clk);
out_mmc_free:
mmc_free_host(mmc);
return ret;
@@ -777,6 +785,7 @@ static int mxs_mmc_remove(struct platform_device *pdev)
{
struct mmc_host *mmc = platform_get_drvdata(pdev);
struct mxs_mmc_host *host = mmc_priv(mmc);
+ struct mxs_ssp *ssp = &host->ssp;
mmc_remove_host(mmc);
@@ -785,8 +794,8 @@ static int mxs_mmc_remove(struct platform_device *pdev)
if (host->dmach)
dma_release_channel(host->dmach);
- clk_disable_unprepare(host->clk);
- clk_put(host->clk);
+ clk_disable_unprepare(ssp->clk);
+ clk_put(ssp->clk);
mmc_free_host(mmc);
@@ -798,11 +807,12 @@ static int mxs_mmc_suspend(struct device *dev)
{
struct mmc_host *mmc = dev_get_drvdata(dev);
struct mxs_mmc_host *host = mmc_priv(mmc);
+ struct mxs_ssp *ssp = &host->ssp;
int ret = 0;
ret = mmc_suspend_host(mmc);
- clk_disable_unprepare(host->clk);
+ clk_disable_unprepare(ssp->clk);
return ret;
}
@@ -811,9 +821,10 @@ static int mxs_mmc_resume(struct device *dev)
{
struct mmc_host *mmc = dev_get_drvdata(dev);
struct mxs_mmc_host *host = mmc_priv(mmc);
+ struct mxs_ssp *ssp = &host->ssp;
int ret = 0;
- clk_prepare_enable(host->clk);
+ clk_prepare_enable(ssp->clk);
ret = mmc_resume_host(mmc);