emmc: report response crc error on G12B when hs400 200M busmode [1/1]

PD#SWPL-8670

Problem:
G12B report response crc error when hs400 200M busmode

Solution:
find a eyetest hole between 14-20 or 48-54, otherwise
tuning tx_delay and find again and
adjust CMD rx timing dynamically in HS400 mode

Verify:
passed on G12B

Change-Id: I23e4d5118e0ca0564367a77102aea9e1085633a9
Signed-off-by: Long Yu <long.yu@amlogic.com>

diff --git a/drivers/amlogic/mmc/aml_sd_emmc.c b/drivers/amlogic/mmc/aml_sd_emmc.c
index 80add27..d8446d6 100644 (file)
--- a/drivers/amlogic/mmc/aml_sd_emmc.c
+++ b/drivers/amlogic/mmc/aml_sd_emmc.c
@@ -3128,7 +3128,8 @@ static int meson_mmc_probe(struct platform_device *pdev)
        host->pinctrl = NULL;
        host->status = HOST_INVALID;
        host->is_tunning = 0;
-       host->is_timming = 0;
+       host->find_win = 0;
+       host->cmd_retune = 0;
 
        if (host->ctrl_ver >= 3)
                ret = meson_mmc_clk_init_v3(host);

diff --git a/drivers/amlogic/mmc/aml_sd_emmc_v3.c b/drivers/amlogic/mmc/aml_sd_emmc_v3.c
index 828e371..002b057 100644 (file)
--- a/drivers/amlogic/mmc/aml_sd_emmc_v3.c
+++ b/drivers/amlogic/mmc/aml_sd_emmc_v3.c
@@ -514,6 +514,7 @@ irqreturn_t meson_mmc_irq_thread_v3(int irq, void *dev_id)
        unsigned long flags;
        enum aml_mmc_waitfor xfer_step;
        u32 status, xfer_bytes = 0;
+       u32 delay2 = 0, tmp = 0;
 
        spin_lock_irqsave(&host->mrq_lock, flags);
        pdata = mmc_priv(host->mmc);
@@ -589,9 +590,6 @@ irqreturn_t meson_mmc_irq_thread_v3(int irq, void *dev_id)
        case HOST_DAT_TIMEOUT_ERR:
        case HOST_RSP_CRC_ERR:
        case HOST_DAT_CRC_ERR:
-               if (host->is_tunning == 0)
-                       pr_info("%s %d %s: cmd:%d\n", __func__, __LINE__,
-                               mmc_hostname(host->mmc), mrq->cmd->opcode);
                if (mrq->cmd->data) {
                        dma_unmap_sg(mmc_dev(host->mmc), mrq->cmd->data->sg,
                                mrq->cmd->data->sg_len,
@@ -600,14 +598,29 @@ irqreturn_t meson_mmc_irq_thread_v3(int irq, void *dev_id)
                }
                meson_mmc_read_resp(host->mmc, host->mrq->cmd);
 
+               if (((status == HOST_RSP_CRC_ERR)
+                       || (status == HOST_RSP_TIMEOUT_ERR))
+                       && (host->cmd_retune == 1)) {
+
+                       if (host->error_flag == 0)
+                               host->is_tunning = 0;
+                       delay2 = readl(host->base + SD_EMMC_DELAY2_V3);
+                       tmp = (((delay2 >> 24) & 0x3f) + 3) % 0x3f;
+                       delay2 = (delay2 & ~(0x3f << 24)) | (tmp << 24);
+                       writel(delay2, host->base + SD_EMMC_DELAY2_V3);
+                       pr_err("retune cmd-delay:0x%x\n", delay2);
+               }
                /* set retry @ 1st error happens! */
                if ((host->error_flag == 0)
                        && (aml_card_type_mmc(pdata)
                                || aml_card_type_non_sdio(pdata))
                        && (host->is_tunning == 0)) {
 
-                       pr_err("%s() %d: set 1st retry!\n",
+                       if (host->find_win == 0)
+                               pr_err("%s() %d: set 1st retry!\n",
                                        __func__, __LINE__);
+                       else
+                               host->is_tunning = 1;
                        host->error_flag |= (1<<0);
                        spin_lock_irqsave(&host->mrq_lock, flags);
                        mrq->cmd->retries = 3;
@@ -616,7 +629,8 @@ irqreturn_t meson_mmc_irq_thread_v3(int irq, void *dev_id)
 
                if (aml_card_type_mmc(pdata) &&
                        (host->error_flag & (1<<0)) && mrq->cmd->retries) {
-                       pr_err("retry cmd %d the %d-th time(s)\n",
+                       if (host->find_win == 0)
+                               pr_err("retry cmd %d the %d-th time(s)\n",
                                        mrq->cmd->opcode, mrq->cmd->retries);
                        /* chage configs on current host */
                }
@@ -624,7 +638,8 @@ irqreturn_t meson_mmc_irq_thread_v3(int irq, void *dev_id)
                if ((aml_card_type_mmc(pdata) || aml_card_type_non_sdio(pdata))
                        && host->error_flag && (mrq->cmd->retries == 0)) {
                        host->error_flag |= (1<<30);
-                       pr_err("Command retried failed line:%d, cmd:%d\n",
+                       if (host->find_win == 0)
+                               pr_err("Command retried failed line:%d, cmd:%d\n",
                                        __LINE__, mrq->cmd->opcode);
                }
                /* retry need send a stop 2 emmc... */
@@ -1084,9 +1099,14 @@ static int emmc_ds_manual_sht(struct mmc_host *mmc)
        int best_start = -1, best_size = -1;
        int cur_start = -1, cur_size = 0;
 
-       host->is_tunning = 1;
+       if (host->data->chip_type >= MMC_CHIP_TL1) {
+               host->cmd_retune = 1;
+               host->find_win = 1;
+       }
        for (i = 0; i < 64; i++) {
+               host->is_tunning = 1;
                err = emmc_test_bus(mmc);
+               host->is_tunning = 0;
                pr_debug("intf3: 0x%x, err[%d]: %d\n",
                                readl(host->base + SD_EMMC_INTF3), i, err);
                if (!err)
@@ -1139,7 +1159,7 @@ static int emmc_ds_manual_sht(struct mmc_host *mmc)
                        readl(host->base + SD_EMMC_INTF3),
                        readl(host->base + SD_EMMC_CLOCK_V3));
        pr_info("adjust:0x%x\n", readl(host->base + SD_EMMC_ADJUST_V3));
-       host->is_tunning = 0;
+       host->find_win = 0;
        return 0;
 }
 #endif
@@ -1528,7 +1548,6 @@ int aml_get_data_eyetest(struct mmc_host *mmc)
        u32 delay2 = readl(host->base + SD_EMMC_DELAY2_V3);
        int ret = 0, retry = 10, line_x;
 
-       host->is_timming = 1;
        host->is_tunning = 1;
        pr_info("[%s] 2018-4-18 emmc HS200 Timming\n", __func__);
        aml_sd_emmc_clktest(mmc);
@@ -1568,7 +1587,6 @@ RETRY:
                readl(host->base + SD_EMMC_DELAY1_V3),
                readl(host->base + SD_EMMC_DELAY2_V3));
        update_all_line_eyetest(mmc);
-       host->is_timming = 0;
        host->is_tunning = 0;
        return 0;
 }
@@ -1585,6 +1603,7 @@ int aml_emmc_hs200_tl1(struct mmc_host *mmc)
        int i, j, err = 0;
        int retry_times = 0;
 
+       aml_sd_emmc_clktest(mmc);
        clk_bak = vclkc;
        clkc->tx_phase = para->hs4.tx_phase;
        clkc->core_phase = para->hs4.core_phase;
@@ -1603,42 +1622,31 @@ retry:
                if (err)
                        continue;
                count = fbinary(pdata->align[9]);
-               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)))
+               if (((count >= 14) && (count <= 20))
+                       || ((count >= 48) && (count <= 54))) {
+                       if (retry_times != 3) {
+                               retry_times++;
+                               goto retry;
+                       } else
                                break;
                }
        }
 
-       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;
+       if (i == 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;
                }
-       } else {
-               if (i == 63)
-                       pr_err("[%s]no find cmd timing\n", __func__);
+               pdata->tx_delay = clkc->tx_delay;
        }
 
        pdata->cmd_c = (delay2 >> 24);

diff --git a/include/linux/amlogic/sd.h b/include/linux/amlogic/sd.h
index 20aeb95..c31fe57 100644 (file)
--- a/include/linux/amlogic/sd.h
+++ b/include/linux/amlogic/sd.h
@@ -441,7 +441,8 @@ struct amlsd_host {
        dma_addr_t              dma_gping; /* 0x400 */
        dma_addr_t              dma_gpong; /* 0x800 */
        char is_tunning;
-       char is_timming;
+       char cmd_retune;
+       char find_win;
        char tuning_mode;
        unsigned int is_sduart;
        unsigned int irq;