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emmc: get emmc cmd-window for HS400 busmode

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PD#169808: emmc: get emmc cmd-window for HS400 busmode

Change-Id: I88de1e9e5470bb6be7ad91e1ee58f5636f994923
Signed-off-by: Long Yu <long.yu@amlogic.com>
This commit is contained in:
Long Yu
2018-07-31 14:45:21 +08:00
committed by Jianxin Pan
parent 73c0a0b001
commit 133c9560ef
1 changed files with 71 additions and 19 deletions
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90
drivers/amlogic/mmc/aml_sd_emmc_v3.c
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@@ -864,6 +864,66 @@ static void update_all_line_eyetest(struct mmc_host *mmc)
emmc_eyetest_log(mmc, line_x);
}
}
static unsigned int get_emmc_cmd_win(struct mmc_host *mmc)
{
struct amlsd_platform *pdata = mmc_priv(mmc);
struct amlsd_host *host = pdata->host;
u32 delay2 = readl(host->base + SD_EMMC_DELAY2_V3);
u32 max = 0, i, temp;
u32 str[64] = {0};
int best_start = -1, best_size = -1;
int cur_start = -1, cur_size = 0;
for (i = 0; i < 64; i++) {
delay2 &= ~(0x3f << 24);
delay2 |= (i << 24);
writel(delay2, host->base + SD_EMMC_DELAY2_V3);
emmc_eyetest_log(mmc, 9);
temp = fbinary(pdata->align[9]);
str[i] = temp;
if (max < temp)
max = temp;
}
for (i = 0; i < 64; i++) {
if (str[i] >= 4) {
if (cur_start < 0)
cur_start = i;
cur_size++;
} else {
if (cur_start >= 0) {
if (best_start < 0) {
best_start = cur_start;
best_size = cur_size;
} else {
if (best_size < cur_size) {
best_start = cur_start;
best_size = cur_size;
}
}
cur_start = -1;
cur_size = 0;
}
}
}
if (cur_start >= 0) {
if (best_start < 0) {
best_start = cur_start;
best_size = cur_size;
} else if (best_size < cur_size) {
best_start = cur_start;
best_size = cur_size;
}
cur_start = -1;
cur_size = -1;
}
delay2 &= ~(0x3f << 24);
delay2 |= ((best_start + best_size / 2) << 24);
writel(delay2, host->base + SD_EMMC_DELAY2_V3);
emmc_eyetest_log(mmc, 9);
return max;
}
/* first step*/
static int emmc_ds_core_align(struct mmc_host *mmc)
{
@@ -872,8 +932,7 @@ static int emmc_ds_core_align(struct mmc_host *mmc)
u32 delay1 = readl(host->base + SD_EMMC_DELAY1_V3);
u32 delay2 = readl(host->base + SD_EMMC_DELAY2_V3);
u32 delay2_bak = delay2;
u32 count = 0;
u32 ds_count = 0, cmd_count = 0;
u32 count = 0, ds_count = 0, cmd_count = 0;
ds_count = fbinary(pdata->align[8]);
if (ds_count == 0)
@@ -900,26 +959,19 @@ static int emmc_ds_core_align(struct mmc_host *mmc)
count = ((delay2>>18) & 0x3f) - ((delay2_bak>>18) & 0x3f);
delay1 += (count<<0)|(count<<6)|(count<<12)|(count<<18)|(count<<24);
delay2 += (count<<0)|(count<<6)|(count<<12);
writel(delay1, host->base + SD_EMMC_DELAY1_V3);
writel(delay2, host->base + SD_EMMC_DELAY2_V3);
out_cmd:
cmd_count = fbinary(pdata->align[9]);
if (cmd_count <= (pdata->count/3))
cmd_count = (pdata->count/3)-cmd_count;
else if (cmd_count <= 2*pdata->count/3)
cmd_count = 0;
else if (cmd_count <= pdata->count)
cmd_count = (pdata->count-cmd_count)+pdata->count/3;
else
cmd_count = pdata->count/3;
delay2 += (cmd_count<<24);
writel(delay1, host->base + SD_EMMC_DELAY1_V3);
writel(delay2, host->base + SD_EMMC_DELAY2_V3);
pdata->dly1 = delay1;
pdata->dly2 = delay2;
pr_info("cmd_count:%d,delay1:0x%x,delay2:0x%x,count: %u\n",
cmd_count, readl(host->base + SD_EMMC_DELAY1_V3),
readl(host->base + SD_EMMC_DELAY2_V3), count);
cmd_count = get_emmc_cmd_win(mmc);
pdata->dly1 = readl(host->base + SD_EMMC_DELAY1_V3);
pdata->dly2 = readl(host->base + SD_EMMC_DELAY2_V3);
pr_info("ds_count:%u,count:%d, cmd_count:%u\n",
ds_count, count, cmd_count);
pr_info("delay1:0x%x,delay2:0x%x\n",
readl(host->base + SD_EMMC_DELAY1_V3),
readl(host->base + SD_EMMC_DELAY2_V3));
return 0;
}