emmc: report response crc error on tl1 when hs400 200M busmode [1/1]

PD#SWPL-7740

Problem:
tl1 report response crc error on tl1 when hs400 200M busmode

Solution:
find a eyetest hole between 14-20 or 48-54, otherwise
tuning tx_delay and find again

Verify:
passed on tl1_skt

Change-Id: I46e2c3c4d7ef24bcac7b44fee73112894540fc33
Signed-off-by: Ruixuan Li <ruixuan.li@amlogic.com>

diff --git a/drivers/amlogic/mmc/aml_sd_emmc_v3.c b/drivers/amlogic/mmc/aml_sd_emmc_v3.c
index de9982c..828e371 100644 (file)
--- a/drivers/amlogic/mmc/aml_sd_emmc_v3.c
+++ b/drivers/amlogic/mmc/aml_sd_emmc_v3.c
@@ -1582,7 +1582,8 @@ int aml_emmc_hs200_tl1(struct mmc_host *mmc)
        struct para_e *para = &(host->data->sdmmc);
        u32 clk_bak = 0;
        u32 delay2 = 0, count = 0;
-       int i, err = 0;
+       int i, j, err = 0;
+       int retry_times = 0;
 
        clk_bak = vclkc;
        clkc->tx_phase = para->hs4.tx_phase;
@@ -1594,18 +1595,52 @@ int aml_emmc_hs200_tl1(struct mmc_host *mmc)
        pr_info("[%s][%d] clk config:0x%x\n",
                __func__, __LINE__, readl(host->base + SD_EMMC_CLOCK_V3));
        for (i = 0; i < 63; i++) {
+               retry_times = 0;
                delay2 += (1 << 24);
                writel(delay2, host->base + SD_EMMC_DELAY2_V3);
+retry:
                err = emmc_eyetest_log(mmc, 9);
                if (err)
                        continue;
                count = fbinary(pdata->align[9]);
-               if (((count >= 10) && (count <= 22))
-                       || ((count >= 45) && (count <= 56)))
-                       break;
+               if (host->data->chip_type == MMC_CHIP_TL1) {
+                       if (((count >= 14) && (count <= 20))
+                               || ((count >= 48) && (count <= 54))) {
+                               if (retry_times != 3) {
+                                       retry_times++;
+                                       goto retry;
+                               } else
+                                       break;
+                       }
+               } else {
+                       if (((count >= 10) && (count <= 22))
+                               || ((count >= 45) && (count <= 56)))
+                               break;
+               }
        }
-       if (i == 63)
-               pr_err("[%s]no find cmd timing\n", __func__);
+
+       if (host->data->chip_type == MMC_CHIP_TL1) {
+               if (delay2 == 63) {
+                       for (j = 0; j < 6; j++) {
+                               clkc->tx_delay++;
+                               pr_info("modify tx delay to %d\n",
+                                               clkc->tx_delay);
+                               writel(vclkc, host->base + SD_EMMC_CLOCK_V3);
+                               err = emmc_eyetest_log(mmc, 9);
+                               if (err)
+                                       continue;
+                               count = fbinary(pdata->align[9]);
+                               if (((count >= 14) && (count <= 20))
+                                       || ((count >= 48) && (count <= 54)))
+                                       break;
+                       }
+                       pdata->tx_delay = clkc->tx_delay;
+               }
+       } else {
+               if (i == 63)
+                       pr_err("[%s]no find cmd timing\n", __func__);
+       }
+
        pdata->cmd_c = (delay2 >> 24);
        pr_info("cmd->u64eyet:0x%016llx\n",
                        pdata->align[9]);