You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
170 lines
6.1 KiB
170 lines
6.1 KiB
From 830574225e621809600902b69bbdd563e67ef4eb Mon Sep 17 00:00:00 2001
|
|
From: Chaotian Jing <chaotian.jing@mediatek.com>
|
|
Date: Mon, 16 Oct 2017 09:46:33 +0800
|
|
Subject: [PATCH 154/224] mmc: mediatek: add async fifo and data tune support
|
|
|
|
mt2701/mt2712 supports async fifo & data tune, 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>
|
|
---
|
|
drivers/mmc/host/mtk-sd.c | 52 +++++++++++++++++++++++++++++++++++++++++++++--
|
|
1 file changed, 50 insertions(+), 2 deletions(-)
|
|
|
|
--- a/drivers/mmc/host/mtk-sd.c
|
|
+++ b/drivers/mmc/host/mtk-sd.c
|
|
@@ -74,6 +74,7 @@
|
|
#define MSDC_DMA_CFG 0x9c
|
|
#define MSDC_PATCH_BIT 0xb0
|
|
#define MSDC_PATCH_BIT1 0xb4
|
|
+#define MSDC_PATCH_BIT2 0xb8
|
|
#define MSDC_PAD_TUNE 0xec
|
|
#define MSDC_PAD_TUNE0 0xf0
|
|
#define PAD_DS_TUNE 0x188
|
|
@@ -216,11 +217,20 @@
|
|
#define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */
|
|
#define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */
|
|
|
|
+#define MSDC_PATCH_BIT2_CFGRESP (0x1 << 15) /* RW */
|
|
+#define MSDC_PATCH_BIT2_CFGCRCSTS (0x1 << 28) /* RW */
|
|
+#define MSDC_PB2_RESPWAIT (0x3 << 2) /* RW */
|
|
+#define MSDC_PB2_RESPSTSENSEL (0x7 << 16) /* RW */
|
|
+#define MSDC_PB2_CRCSTSENSEL (0x7 << 29) /* RW */
|
|
+
|
|
#define MSDC_PAD_TUNE_DATWRDLY (0x1f << 0) /* RW */
|
|
#define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */
|
|
#define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */
|
|
#define MSDC_PAD_TUNE_CMDRRDLY (0x1f << 22) /* RW */
|
|
#define MSDC_PAD_TUNE_CLKTDLY (0x1f << 27) /* RW */
|
|
+#define MSDC_PAD_TUNE_RXDLYSEL (0x1 << 15) /* RW */
|
|
+#define MSDC_PAD_TUNE_RD_SEL (0x1 << 13) /* RW */
|
|
+#define MSDC_PAD_TUNE_CMD_SEL (0x1 << 21) /* RW */
|
|
|
|
#define PAD_DS_TUNE_DLY1 (0x1f << 2) /* RW */
|
|
#define PAD_DS_TUNE_DLY2 (0x1f << 7) /* RW */
|
|
@@ -294,6 +304,7 @@ struct msdc_save_para {
|
|
u32 pad_tune;
|
|
u32 patch_bit0;
|
|
u32 patch_bit1;
|
|
+ u32 patch_bit2;
|
|
u32 pad_ds_tune;
|
|
u32 pad_cmd_tune;
|
|
u32 emmc50_cfg0;
|
|
@@ -303,6 +314,8 @@ struct mtk_mmc_compatible {
|
|
u8 clk_div_bits;
|
|
bool hs400_tune; /* only used for MT8173 */
|
|
u32 pad_tune_reg;
|
|
+ bool async_fifo;
|
|
+ bool data_tune;
|
|
};
|
|
|
|
struct msdc_tune_para {
|
|
@@ -365,24 +378,32 @@ static const struct mtk_mmc_compatible m
|
|
.clk_div_bits = 8,
|
|
.hs400_tune = false,
|
|
.pad_tune_reg = MSDC_PAD_TUNE,
|
|
+ .async_fifo = false,
|
|
+ .data_tune = false,
|
|
};
|
|
|
|
static const struct mtk_mmc_compatible mt8173_compat = {
|
|
.clk_div_bits = 8,
|
|
.hs400_tune = true,
|
|
.pad_tune_reg = MSDC_PAD_TUNE,
|
|
+ .async_fifo = false,
|
|
+ .data_tune = false,
|
|
};
|
|
|
|
static const struct mtk_mmc_compatible mt2701_compat = {
|
|
.clk_div_bits = 12,
|
|
.hs400_tune = false,
|
|
.pad_tune_reg = MSDC_PAD_TUNE0,
|
|
+ .async_fifo = true,
|
|
+ .data_tune = true,
|
|
};
|
|
|
|
static const struct mtk_mmc_compatible mt2712_compat = {
|
|
.clk_div_bits = 12,
|
|
.hs400_tune = false,
|
|
.pad_tune_reg = MSDC_PAD_TUNE0,
|
|
+ .async_fifo = true,
|
|
+ .data_tune = true,
|
|
};
|
|
|
|
static const struct of_device_id msdc_of_ids[] = {
|
|
@@ -1252,8 +1273,29 @@ static void msdc_init_hw(struct msdc_hos
|
|
sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0);
|
|
writel(0x403c0046, host->base + MSDC_PATCH_BIT);
|
|
sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1);
|
|
- writel(0xffff0089, host->base + MSDC_PATCH_BIT1);
|
|
+ writel(0xffff4089, host->base + MSDC_PATCH_BIT1);
|
|
sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL);
|
|
+ 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);
|
|
+ /* use async fifo, then no need tune internal delay */
|
|
+ sdr_clr_bits(host->base + MSDC_PATCH_BIT2,
|
|
+ MSDC_PATCH_BIT2_CFGRESP);
|
|
+ sdr_set_bits(host->base + MSDC_PATCH_BIT2,
|
|
+ MSDC_PATCH_BIT2_CFGCRCSTS);
|
|
+ }
|
|
+
|
|
+ if (host->dev_comp->data_tune) {
|
|
+ sdr_set_bits(host->base + tune_reg,
|
|
+ MSDC_PAD_TUNE_RD_SEL | MSDC_PAD_TUNE_CMD_SEL);
|
|
+ } else {
|
|
+ /* choose clock tune */
|
|
+ sdr_set_bits(host->base + tune_reg, MSDC_PAD_TUNE_RXDLYSEL);
|
|
+ }
|
|
|
|
/* Configure to enable SDIO mode.
|
|
* it's must otherwise sdio cmd5 failed
|
|
@@ -1268,6 +1310,8 @@ static void msdc_init_hw(struct msdc_hos
|
|
|
|
host->def_tune_para.iocon = readl(host->base + MSDC_IOCON);
|
|
host->def_tune_para.pad_tune = readl(host->base + tune_reg);
|
|
+ host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
|
|
+ host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
|
|
dev_dbg(host->dev, "init hardware done!");
|
|
}
|
|
|
|
@@ -1480,7 +1524,7 @@ skip_fall:
|
|
final_fall_delay.final_phase);
|
|
final_delay = final_fall_delay.final_phase;
|
|
}
|
|
- if (host->hs200_cmd_int_delay)
|
|
+ if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay)
|
|
goto skip_internal;
|
|
|
|
for (i = 0; i < PAD_DELAY_MAX; i++) {
|
|
@@ -1638,6 +1682,8 @@ static int msdc_prepare_hs400_tuning(str
|
|
host->hs400_mode = true;
|
|
|
|
writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE);
|
|
+ /* hs400 mode must set it to 0 */
|
|
+ sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS);
|
|
return 0;
|
|
}
|
|
|
|
@@ -1876,6 +1922,7 @@ static void msdc_save_reg(struct msdc_ho
|
|
host->save_para.pad_tune = readl(host->base + tune_reg);
|
|
host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT);
|
|
host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1);
|
|
+ host->save_para.patch_bit2 = readl(host->base + MSDC_PATCH_BIT2);
|
|
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);
|
|
@@ -1891,6 +1938,7 @@ static void msdc_restore_reg(struct msdc
|
|
writel(host->save_para.pad_tune, host->base + tune_reg);
|
|
writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT);
|
|
writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1);
|
|
+ writel(host->save_para.patch_bit2, host->base + MSDC_PATCH_BIT2);
|
|
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);
|
|
|