[PATCH v2 7/9] mmc: mmc: extend the mmc_send_tuning()
Chaotian Jing
chaotian.jing at mediatek.com
Tue Oct 20 02:13:09 PDT 2015
The mmc_execute_tuning() has already prepared the opcode,
there is no need to prepare it again at mmc_send_tuning(),
and, there is a BUG of mmc_send_tuning() to determine the opcode
by bus width, assume eMMC was running at HS200, 4bit mode,
then the mmc_send_tuning() will overwrite the opcode from CMD21
to CMD19, then got error.
in addition, extend an argument of "cmd_error" to allow getting
if there was cmd error when tune response.
Signed-off-by: Chaotian Jing <chaotian.jing at mediatek.com>
---
drivers/mmc/core/mmc_ops.c | 8 ++++----
drivers/mmc/host/dw_mmc-exynos.c | 4 ++--
drivers/mmc/host/dw_mmc.c | 2 +-
drivers/mmc/host/dw_mmc.h | 2 +-
drivers/mmc/host/sdhci-esdhc-imx.c | 6 +++---
drivers/mmc/host/sdhci-msm.c | 2 +-
drivers/mmc/host/sdhci-sirf.c | 2 +-
include/linux/mmc/core.h | 2 +-
8 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 0e9ae1c..4305f75 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -589,7 +589,7 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
}
EXPORT_SYMBOL_GPL(mmc_switch);
-int mmc_send_tuning(struct mmc_host *host)
+int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error)
{
struct mmc_request mrq = {NULL};
struct mmc_command cmd = {0};
@@ -599,16 +599,13 @@ int mmc_send_tuning(struct mmc_host *host)
const u8 *tuning_block_pattern;
int size, err = 0;
u8 *data_buf;
- u32 opcode;
if (ios->bus_width == MMC_BUS_WIDTH_8) {
tuning_block_pattern = tuning_blk_pattern_8bit;
size = sizeof(tuning_blk_pattern_8bit);
- opcode = MMC_SEND_TUNING_BLOCK_HS200;
} else if (ios->bus_width == MMC_BUS_WIDTH_4) {
tuning_block_pattern = tuning_blk_pattern_4bit;
size = sizeof(tuning_blk_pattern_4bit);
- opcode = MMC_SEND_TUNING_BLOCK;
} else
return -EINVAL;
@@ -639,6 +636,9 @@ int mmc_send_tuning(struct mmc_host *host)
mmc_wait_for_req(host, &mrq);
+ if (cmd_error)
+ *cmd_error = cmd.error;
+
if (cmd.error) {
err = cmd.error;
goto out;
diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index 1e75309..3a7e835 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -446,7 +446,7 @@ out:
return loc;
}
-static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot)
+static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot, u32 opcode)
{
struct dw_mci *host = slot->host;
struct dw_mci_exynos_priv_data *priv = host->priv;
@@ -461,7 +461,7 @@ static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot)
mci_writel(host, TMOUT, ~0);
smpl = dw_mci_exynos_move_next_clksmpl(host);
- if (!mmc_send_tuning(mmc))
+ if (!mmc_send_tuning(mmc, opcode, NULL))
candiates |= (1 << smpl);
} while (start_smpl != smpl);
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index fcbf552..be8441d 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1427,7 +1427,7 @@ static int dw_mci_execute_tuning(struct mmc_host *mmc, u32 opcode)
int err = -EINVAL;
if (drv_data && drv_data->execute_tuning)
- err = drv_data->execute_tuning(slot);
+ err = drv_data->execute_tuning(slot, opcode);
return err;
}
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 8ce4674..394340f 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -281,7 +281,7 @@ struct dw_mci_drv_data {
void (*prepare_command)(struct dw_mci *host, u32 *cmdr);
void (*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
int (*parse_dt)(struct dw_mci *host);
- int (*execute_tuning)(struct dw_mci_slot *slot);
+ int (*execute_tuning)(struct dw_mci_slot *slot, u32 opcode);
int (*prepare_hs400_tuning)(struct dw_mci *host,
struct mmc_ios *ios);
int (*switch_voltage)(struct mmc_host *mmc,
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 886d230..1f1582f 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -759,7 +759,7 @@ static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode)
min = ESDHC_TUNE_CTRL_MIN;
while (min < ESDHC_TUNE_CTRL_MAX) {
esdhc_prepare_tuning(host, min);
- if (!mmc_send_tuning(host->mmc))
+ if (!mmc_send_tuning(host->mmc, opcode, NULL))
break;
min += ESDHC_TUNE_CTRL_STEP;
}
@@ -768,7 +768,7 @@ static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode)
max = min + ESDHC_TUNE_CTRL_STEP;
while (max < ESDHC_TUNE_CTRL_MAX) {
esdhc_prepare_tuning(host, max);
- if (mmc_send_tuning(host->mmc)) {
+ if (mmc_send_tuning(host->mmc, opcode, NULL)) {
max -= ESDHC_TUNE_CTRL_STEP;
break;
}
@@ -778,7 +778,7 @@ static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode)
/* use average delay to get the best timing */
avg = (min + max) / 2;
esdhc_prepare_tuning(host, avg);
- ret = mmc_send_tuning(host->mmc);
+ ret = mmc_send_tuning(host->mmc, opcode, NULL);
esdhc_post_tuning(host);
dev_dbg(mmc_dev(host->mmc), "tunning %s at 0x%x ret %d\n",
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 4bcee03..4695bee 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -373,7 +373,7 @@ retry:
if (rc)
return rc;
- rc = mmc_send_tuning(mmc);
+ rc = mmc_send_tuning(mmc, opcode, NULL);
if (!rc) {
/* Tuning is successful at this tuning point */
tuned_phases[tuned_phase_cnt++] = phase;
diff --git a/drivers/mmc/host/sdhci-sirf.c b/drivers/mmc/host/sdhci-sirf.c
index 8842945..d0c7ffe 100644
--- a/drivers/mmc/host/sdhci-sirf.c
+++ b/drivers/mmc/host/sdhci-sirf.c
@@ -97,7 +97,7 @@ retry:
clock_setting | phase,
SDHCI_CLK_DELAY_SETTING);
- if (!mmc_send_tuning(mmc)) {
+ if (!mmc_send_tuning(mmc, opcode, NULL)) {
/* Tuning is successful at this tuning point */
tuned_phase_cnt++;
dev_dbg(mmc_dev(mmc), "%s: Found good phase = %d\n",
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 258daf9..43a283a 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -155,7 +155,7 @@ extern void mmc_start_bkops(struct mmc_card *card, bool from_exception);
extern int __mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int, bool,
bool, bool);
extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
-extern int mmc_send_tuning(struct mmc_host *host);
+extern int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error);
extern int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
#define MMC_ERASE_ARG 0x00000000
--
1.8.1.1.dirty
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