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authorJaehoon Chung <jh80.chung@samsung.com>2015-02-04 15:48:40 +0900
committerPantelis Antoniou <pantelis.antoniou@konsulko.com>2015-02-23 19:39:51 +0200
commit5dab81cea5500558b7bfc43a7364ae7ed706d2fc (patch)
tree6c1ab4c9b6aa293f03ff29a1bc20ac3c9c3ea719 /drivers
parent3a33bb1874a75abde8872915f808945b6d20f6f2 (diff)
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mmc: exynos_dw_mmc: use the exynos specific data structure
Clksel value is exynos specific value. It removed "clksel_val" into dwmci_host and created the "dwmci_exynos_priv_data" structure for exynos specific data. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/exynos_dw_mmc.c60
1 files changed, 47 insertions, 13 deletions
diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c
index 3936660..c66c0b0 100644
--- a/drivers/mmc/exynos_dw_mmc.c
+++ b/drivers/mmc/exynos_dw_mmc.c
@@ -19,8 +19,13 @@
#define DWMMC_MAX_CH_NUM 4
#define DWMMC_MAX_FREQ 52000000
#define DWMMC_MIN_FREQ 400000
-#define DWMMC_MMC0_CLKSEL_VAL 0x03030001
-#define DWMMC_MMC2_CLKSEL_VAL 0x03020001
+#define DWMMC_MMC0_SDR_TIMING_VAL 0x03030001
+#define DWMMC_MMC2_SDR_TIMING_VAL 0x03020001
+
+/* Exynos implmentation specific drver private data */
+struct dwmci_exynos_priv_data {
+ u32 sdr_timing;
+};
/*
* Function used as callback function to initialise the
@@ -28,7 +33,9 @@
*/
static void exynos_dwmci_clksel(struct dwmci_host *host)
{
- dwmci_writel(host, DWMCI_CLKSEL, host->clksel_val);
+ struct dwmci_exynos_priv_data *priv = host->priv;
+
+ dwmci_writel(host, DWMCI_CLKSEL, priv->sdr_timing);
}
unsigned int exynos_dwmci_get_clk(struct dwmci_host *host)
@@ -55,6 +62,8 @@ unsigned int exynos_dwmci_get_clk(struct dwmci_host *host)
static void exynos_dwmci_board_init(struct dwmci_host *host)
{
+ struct dwmci_exynos_priv_data *priv = host->priv;
+
if (host->quirks & DWMCI_QUIRK_DISABLE_SMU) {
dwmci_writel(host, EMMCP_MPSBEGIN0, 0);
dwmci_writel(host, EMMCP_SEND0, 0);
@@ -65,8 +74,8 @@ static void exynos_dwmci_board_init(struct dwmci_host *host)
MPSCTRL_NON_SECURE_WRITE_BIT | MPSCTRL_VALID);
}
- /* Set to clksel_val at initial time */
- if (host->clksel_val)
+ /* Set to timing value at initial time */
+ if (priv->sdr_timing)
exynos_dwmci_clksel(host);
}
@@ -74,6 +83,7 @@ static int exynos_dwmci_core_init(struct dwmci_host *host, int index)
{
unsigned int div;
unsigned long freq, sclk;
+ struct dwmci_exynos_priv_data *priv = host->priv;
if (host->bus_hz)
freq = host->bus_hz;
@@ -92,11 +102,11 @@ static int exynos_dwmci_core_init(struct dwmci_host *host, int index)
#endif
host->board_init = exynos_dwmci_board_init;
- if (!host->clksel_val) {
+ if (!priv->sdr_timing) {
if (index == 0)
- host->clksel_val = DWMMC_MMC0_CLKSEL_VAL;
+ priv->sdr_timing = DWMMC_MMC0_SDR_TIMING_VAL;
else if (index == 2)
- host->clksel_val = DWMMC_MMC2_CLKSEL_VAL;
+ priv->sdr_timing = DWMMC_MMC2_SDR_TIMING_VAL;
}
host->caps = MMC_MODE_DDR_52MHz;
@@ -122,6 +132,7 @@ static int exynos_dwmci_core_init(struct dwmci_host *host, int index)
int exynos_dwmci_add_port(int index, u32 regbase, int bus_width, u32 clksel)
{
struct dwmci_host *host = NULL;
+ struct dwmci_exynos_priv_data *priv;
host = malloc(sizeof(struct dwmci_host));
if (!host) {
@@ -129,11 +140,19 @@ int exynos_dwmci_add_port(int index, u32 regbase, int bus_width, u32 clksel)
return -ENOMEM;
}
+ priv = malloc(sizeof(struct dwmci_exynos_priv_data));
+ if (!priv) {
+ error("dwmci_exynos_priv_data malloc fail!\n");
+ return -ENOMEM;
+ }
+
host->ioaddr = (void *)regbase;
host->buswidth = bus_width;
if (clksel)
- host->clksel_val = clksel;
+ priv->sdr_timing = clksel;
+
+ host->priv = priv;
return exynos_dwmci_core_init(host, index);
}
@@ -161,7 +180,14 @@ static int exynos_dwmci_get_config(const void *blob, int node,
struct dwmci_host *host)
{
int err = 0;
- u32 base, clksel_val, timing[3];
+ u32 base, timing[3];
+ struct dwmci_exynos_priv_data *priv;
+
+ priv = malloc(sizeof(struct dwmci_exynos_priv_data));
+ if (!priv) {
+ error("dwmci_exynos_priv_data malloc fail!\n");
+ return -ENOMEM;
+ }
/* Extract device id for each mmc channel */
host->dev_id = pinmux_decode_periph_id(blob, node);
@@ -194,16 +220,24 @@ static int exynos_dwmci_get_config(const void *blob, int node,
return -EINVAL;
}
- clksel_val = (DWMCI_SET_SAMPLE_CLK(timing[0]) |
+ priv->sdr_timing = (DWMCI_SET_SAMPLE_CLK(timing[0]) |
DWMCI_SET_DRV_CLK(timing[1]) |
DWMCI_SET_DIV_RATIO(timing[2]));
- if (clksel_val)
- host->clksel_val = clksel_val;
+
+ /* sdr_timing didn't assigned anything, use the default value */
+ if (!priv->sdr_timing) {
+ if (host->dev_index == 0)
+ priv->sdr_timing = DWMMC_MMC0_SDR_TIMING_VAL;
+ else if (host->dev_index == 2)
+ priv->sdr_timing = DWMMC_MMC2_SDR_TIMING_VAL;
+ }
host->fifoth_val = fdtdec_get_int(blob, node, "fifoth_val", 0);
host->bus_hz = fdtdec_get_int(blob, node, "bus_hz", 0);
host->div = fdtdec_get_int(blob, node, "div", 0);
+ host->priv = priv;
+
return 0;
}