iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mmc: mediatek: add stop_clk fix and enhance_rx support

Browse Source 
mt2712 supports stop_clk fix and enhance_rx, which can improve
host stability.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Tested-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Chaotian Jing 2017-10-16 09:46:35 +08:00 committed by Ulf Hansson
parent acde28c434
commit d9dcbfc880
1 changed files with 43 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
drivers/mmc/host/mtk-sd.c
View File

@ -67,6 +67,7 @@
#define SDC_RESP2 0x48
#define SDC_RESP3 0x4c
#define SDC_BLK_NUM 0x50
#define SDC_ADV_CFG0 0x64
#define EMMC_IOCON 0x7c
#define SDC_ACMD_RESP 0x80
#define MSDC_DMA_SA 0x90
@ -80,6 +81,7 @@
#define PAD_DS_TUNE 0x188
#define PAD_CMD_TUNE 0x18c
#define EMMC50_CFG0 0x208
#define SDC_FIFO_CFG 0x228
/*--------------------------------------------------------------------------*/
/* Register Mask */
@ -188,6 +190,9 @@
#define SDC_STS_CMDBUSY (0x1 << 1) /* RW */
#define SDC_STS_SWR_COMPL (0x1 << 31) /* RW */
/* SDC_ADV_CFG0 mask */
#define SDC_RX_ENHANCE_EN (0x1 << 20) /* RW */
/* MSDC_DMA_CTRL mask */
#define MSDC_DMA_CTRL_START (0x1 << 0) /* W */
#define MSDC_DMA_CTRL_STOP (0x1 << 1) /* W */
@ -217,6 +222,8 @@
#define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */
#define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */
#define MSDC_PATCH_BIT1_STOP_DLY (0xf << 8) /* RW */
#define MSDC_PATCH_BIT2_CFGRESP (0x1 << 15) /* RW */
#define MSDC_PATCH_BIT2_CFGCRCSTS (0x1 << 28) /* RW */
#define MSDC_PB2_RESPWAIT (0x3 << 2) /* RW */
@ -242,6 +249,9 @@
#define EMMC50_CFG_CRCSTS_EDGE (0x1 << 3) /* RW */
#define EMMC50_CFG_CFCSTS_SEL (0x1 << 4) /* RW */
#define SDC_FIFO_CFG_WRVALIDSEL (0x1 << 24) /* RW */
#define SDC_FIFO_CFG_RDVALIDSEL (0x1 << 25) /* RW */
#define REQ_CMD_EIO (0x1 << 0)
#define REQ_CMD_TMO (0x1 << 1)
#define REQ_DAT_ERR (0x1 << 2)
@ -308,6 +318,7 @@ struct msdc_save_para {
u32 pad_ds_tune;
u32 pad_cmd_tune;
u32 emmc50_cfg0;
u32 sdc_fifo_cfg;
};
struct mtk_mmc_compatible {
@ -317,6 +328,8 @@ struct mtk_mmc_compatible {
bool async_fifo;
bool data_tune;
bool busy_check;
bool stop_clk_fix;
bool enhance_rx;
};
struct msdc_tune_para {
@ -382,6 +395,8 @@ static const struct mtk_mmc_compatible mt8135_compat = {
.async_fifo = false,
.data_tune = false,
.busy_check = false,
.stop_clk_fix = false,
.enhance_rx = false,
};
static const struct mtk_mmc_compatible mt8173_compat = {
@ -391,6 +406,8 @@ static const struct mtk_mmc_compatible mt8173_compat = {
.async_fifo = false,
.data_tune = false,
.busy_check = false,
.stop_clk_fix = false,
.enhance_rx = false,
};
static const struct mtk_mmc_compatible mt2701_compat = {
@ -400,6 +417,8 @@ static const struct mtk_mmc_compatible mt2701_compat = {
.async_fifo = true,
.data_tune = true,
.busy_check = false,
.stop_clk_fix = false,
.enhance_rx = false,
};
static const struct mtk_mmc_compatible mt2712_compat = {
@ -409,6 +428,8 @@ static const struct mtk_mmc_compatible mt2712_compat = {
.async_fifo = true,
.data_tune = true,
.busy_check = true,
.stop_clk_fix = true,
.enhance_rx = true,
};
static const struct of_device_id msdc_of_ids[] = {
@ -1280,15 +1301,31 @@ static void msdc_init_hw(struct msdc_host *host)
sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1);
writel(0xffff4089, host->base + MSDC_PATCH_BIT1);
sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL);
if (host->dev_comp->stop_clk_fix) {
sdr_set_field(host->base + MSDC_PATCH_BIT1,
MSDC_PATCH_BIT1_STOP_DLY, 3);
sdr_clr_bits(host->base + SDC_FIFO_CFG,
SDC_FIFO_CFG_WRVALIDSEL);
sdr_clr_bits(host->base + SDC_FIFO_CFG,
SDC_FIFO_CFG_RDVALIDSEL);
}
if (host->dev_comp->busy_check)
sdr_clr_bits(host->base + MSDC_PATCH_BIT1, (1 << 7));
if (host->dev_comp->async_fifo) {
sdr_set_field(host->base + MSDC_PATCH_BIT2,
MSDC_PB2_RESPWAIT, 3);
sdr_set_field(host->base + MSDC_PATCH_BIT2,
MSDC_PB2_RESPSTSENSEL, 2);
sdr_set_field(host->base + MSDC_PATCH_BIT2,
MSDC_PB2_CRCSTSENSEL, 2);
if (host->dev_comp->enhance_rx) {
sdr_set_bits(host->base + SDC_ADV_CFG0,
SDC_RX_ENHANCE_EN);
} else {
sdr_set_field(host->base + MSDC_PATCH_BIT2,
MSDC_PB2_RESPSTSENSEL, 2);
sdr_set_field(host->base + MSDC_PATCH_BIT2,
MSDC_PB2_CRCSTSENSEL, 2);
}
/* use async fifo, then no need tune internal delay */
sdr_clr_bits(host->base + MSDC_PATCH_BIT2,
MSDC_PATCH_BIT2_CFGRESP);
@ -1933,6 +1970,7 @@ static void msdc_save_reg(struct msdc_host *host)
host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE);
host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0);
host->save_para.sdc_fifo_cfg = readl(host->base + SDC_FIFO_CFG);
}
static void msdc_restore_reg(struct msdc_host *host)
@ -1949,6 +1987,7 @@ static void msdc_restore_reg(struct msdc_host *host)
writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE);
writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE);
writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0);
writel(host->save_para.sdc_fifo_cfg, host->base + SDC_FIFO_CFG);
}
static int msdc_runtime_suspend(struct device *dev)