emmc: optimize ds and core clock alignment

PD#166221: emmc: optimize ds and core clock alignment

[problem] If the DS and core clock are aligned

at the beginning of the period, the program will

return directly without setting up CMD delay.

Change-Id: I65f32530884a2bea5171cc92e297a60f375a70f7
Signed-off-by: Long Yu <long.yu@amlogic.com>

diff --git a/drivers/amlogic/mmc/aml_sd_emmc_v3.c b/drivers/amlogic/mmc/aml_sd_emmc_v3.c
index 82c1288..4cd922c 100644 (file)
--- a/drivers/amlogic/mmc/aml_sd_emmc_v3.c
+++ b/drivers/amlogic/mmc/aml_sd_emmc_v3.c
@@ -577,7 +577,6 @@ static int emmc_eyetest_log(struct mmc_host *mmc, u32 line_x)
        u32 eyetest_out0 = 0, eyetest_out1 = 0;
        u32 intf3 = readl(host->base + SD_EMMC_INTF3);
        struct intf3 *gintf3 = (struct intf3 *)&(intf3);
-       u32 vcfg = readl(host->base + SD_EMMC_CFG);
        int retry = 3;
        u64 tmp = 0;
        u32 blksz = 512;
@@ -612,16 +611,16 @@ RETRY:
        eyetest_log = readl(host->base + SD_EMMC_EYETEST_LOG);
 
        if (!(geyetest_log->eyetest_done & 0x1)) {
-               pr_warn("testing eyetest times: 0x%x, out: 0x%x, 0x%x\n",
+               pr_warn("testing eyetest times:0x%x,out:0x%x,0x%x,line:%d\n",
                        readl(host->base + SD_EMMC_EYETEST_LOG),
-                       eyetest_out0, eyetest_out1);
+                       eyetest_out0, eyetest_out1, line_x);
                gintf3->eyetest_on = 0;
                writel(intf3, host->base + SD_EMMC_INTF3);
                pdata->intf3 = intf3;
                retry--;
                if (retry == 0) {
-                       pr_warn("[%s][%d] retry eyetest failed\n",
-                                       __func__, __LINE__);
+                       pr_warn("[%s][%d] retry eyetest failed-line:%d\n",
+                                       __func__, __LINE__, line_x);
                        return 1;
                }
                goto RETRY;
@@ -631,15 +630,11 @@ RETRY:
        gintf3->eyetest_on = 0;
        writel(intf3, host->base + SD_EMMC_INTF3);
        pdata->intf3 = intf3;
-       if (vcfg & 0x4) {
-               if (pdata->count > 32) {
-                       eyetest_out1 <<= (32 - (pdata->count - 32));
-                       eyetest_out1 >>= (32 - (pdata->count - 32));
-               } else
-                       eyetest_out1 = 0x0;
-       }
        pdata->align[line_x] = ((tmp | eyetest_out1) << 32) | eyetest_out0;
-       pr_debug("u64 eyetestout 0x%llx\n", pdata->align[line_x]);
+       pr_debug("d1:0x%x,d2:0x%x,u64eyet:0x%016llx,l_x:%d\n",
+                       readl(host->base + SD_EMMC_DELAY1_V3),
+                       readl(host->base + SD_EMMC_DELAY2_V3),
+                       pdata->align[line_x], line_x);
        host->is_tunning = 0;
        return 0;
 }
@@ -774,8 +769,8 @@ static int emmc_ds_core_align(struct mmc_host *mmc)
 
        ds_count = fbinary(pdata->align[8]);
        if (ds_count == 0)
-               if ((pdata->align[8] & 0xf0) == 0)
-                       return 0;
+               if ((pdata->align[8] & 0x1e0) == 0)
+                       goto out_cmd;
        pr_debug("ds_count:%d,delay1:0x%x,delay2:0x%x\n",
                        ds_count, readl(host->base + SD_EMMC_DELAY1_V3),
                        readl(host->base + SD_EMMC_DELAY2_V3));
@@ -794,11 +789,12 @@ static int emmc_ds_core_align(struct mmc_host *mmc)
        }
        delay1 = readl(host->base + SD_EMMC_DELAY1_V3);
        delay2 = readl(host->base + SD_EMMC_DELAY2_V3);
-       ds_count = fbinary(pdata->align[8]);
        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);
 
+out_cmd:
+
        cmd_count = fbinary(pdata->align[9]);
        if (cmd_count <= (pdata->count/3))
                cmd_count = (pdata->count/3)-cmd_count;
@@ -813,7 +809,7 @@ static int emmc_ds_core_align(struct mmc_host *mmc)
        writel(delay2, host->base + SD_EMMC_DELAY2_V3);
        pdata->dly1 = delay1;
        pdata->dly2 = delay2;
-       pr_debug("cmd_count:%d,delay1:0x%x,delay2:0x%x,count: %u\n",
+       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);
        return 0;
@@ -891,9 +887,10 @@ static int emmc_ds_manual_sht(struct mmc_host *mmc)
        gintf3->ds_sht_m = best_start + best_size / 2;
        writel(intf3, host->base + SD_EMMC_INTF3);
        pdata->intf3 = intf3;
-       pr_info("ds_sht:%u, window:%d, intf3:0x%x",
+       pr_info("ds_sht:%u, window:%d, intf3:0x%x, clock:0x%x",
                        gintf3->ds_sht_m, best_size,
-                       readl(host->base +  SD_EMMC_INTF3));
+                       readl(host->base + SD_EMMC_INTF3),
+                       readl(host->base + SD_EMMC_CLOCK_V3));
        host->is_tunning = 0;
        return 0;
 }