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path: root/drivers/mmc/host/sunxi-mmc.c
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Diffstat (limited to 'drivers/mmc/host/sunxi-mmc.c')
-rw-r--r--drivers/mmc/host/sunxi-mmc.c53
1 files changed, 39 insertions, 14 deletions
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index a7b7a6771598..b981b8552e43 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -210,6 +210,16 @@
#define SDXC_IDMAC_DES0_CES BIT(30) /* card error summary */
#define SDXC_IDMAC_DES0_OWN BIT(31) /* 1-idma owns it, 0-host owns it */
+#define SDXC_CLK_400K 0
+#define SDXC_CLK_25M 1
+#define SDXC_CLK_50M 2
+#define SDXC_CLK_50M_DDR 3
+
+struct sunxi_mmc_clk_delay {
+ u32 output;
+ u32 sample;
+};
+
struct sunxi_idma_des {
u32 config;
u32 buf_size;
@@ -229,6 +239,7 @@ struct sunxi_mmc_host {
struct clk *clk_mmc;
struct clk *clk_sample;
struct clk *clk_output;
+ const struct sunxi_mmc_clk_delay *clk_delays;
/* irq */
spinlock_t lock;
@@ -654,25 +665,19 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host,
/* determine delays */
if (rate <= 400000) {
- oclk_dly = 180;
- sclk_dly = 42;
+ oclk_dly = host->clk_delays[SDXC_CLK_400K].output;
+ sclk_dly = host->clk_delays[SDXC_CLK_400K].sample;
} else if (rate <= 25000000) {
- oclk_dly = 180;
- sclk_dly = 75;
+ oclk_dly = host->clk_delays[SDXC_CLK_25M].output;
+ sclk_dly = host->clk_delays[SDXC_CLK_25M].sample;
} else if (rate <= 50000000) {
if (ios->timing == MMC_TIMING_UHS_DDR50) {
- oclk_dly = 60;
- sclk_dly = 120;
+ oclk_dly = host->clk_delays[SDXC_CLK_50M_DDR].output;
+ sclk_dly = host->clk_delays[SDXC_CLK_50M_DDR].sample;
} else {
- oclk_dly = 90;
- sclk_dly = 150;
+ oclk_dly = host->clk_delays[SDXC_CLK_50M].output;
+ sclk_dly = host->clk_delays[SDXC_CLK_50M].sample;
}
- } else if (rate <= 100000000) {
- oclk_dly = 6;
- sclk_dly = 24;
- } else if (rate <= 200000000) {
- oclk_dly = 3;
- sclk_dly = 12;
} else {
return -EINVAL;
}
@@ -871,6 +876,7 @@ static void sunxi_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
static const struct of_device_id sunxi_mmc_of_match[] = {
{ .compatible = "allwinner,sun4i-a10-mmc", },
{ .compatible = "allwinner,sun5i-a13-mmc", },
+ { .compatible = "allwinner,sun9i-a80-mmc", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sunxi_mmc_of_match);
@@ -884,6 +890,20 @@ static struct mmc_host_ops sunxi_mmc_ops = {
.hw_reset = sunxi_mmc_hw_reset,
};
+static const struct sunxi_mmc_clk_delay sunxi_mmc_clk_delays[] = {
+ [SDXC_CLK_400K] = { .output = 180, .sample = 180 },
+ [SDXC_CLK_25M] = { .output = 180, .sample = 75 },
+ [SDXC_CLK_50M] = { .output = 90, .sample = 120 },
+ [SDXC_CLK_50M_DDR] = { .output = 60, .sample = 120 },
+};
+
+static const struct sunxi_mmc_clk_delay sun9i_mmc_clk_delays[] = {
+ [SDXC_CLK_400K] = { .output = 180, .sample = 180 },
+ [SDXC_CLK_25M] = { .output = 180, .sample = 75 },
+ [SDXC_CLK_50M] = { .output = 150, .sample = 120 },
+ [SDXC_CLK_50M_DDR] = { .output = 90, .sample = 120 },
+};
+
static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
struct platform_device *pdev)
{
@@ -895,6 +915,11 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
else
host->idma_des_size_bits = 16;
+ if (of_device_is_compatible(np, "allwinner,sun9i-a80-mmc"))
+ host->clk_delays = sun9i_mmc_clk_delays;
+ else
+ host->clk_delays = sunxi_mmc_clk_delays;
+
ret = mmc_regulator_get_supply(host->mmc);
if (ret) {
if (ret != -EPROBE_DEFER)