shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

UPSTREAM: mmc: mmc: use ops->card_busy() to check card status in __mmc_switch()

Browse Source 
some MMC host do not support MMC_CAP_WAIT_WHILE_BUSY but provides
ops->card_busy(), So, add this method to check card status after
switch command.

This patch also fix CMD23 command response timeout which found on
evb-rk3288.

[   13.725563  ] mmcblk0: timed out sending SET_BLOCK_COUNT
command,card status 0x400e00
[   13.733328  ] mmcblk0: command error, retrying timeout
[   13.741792  ] mmcblk0: timed out sending SET_BLOCK_COUNT command,card
status 0x400e00
[   13.749555  ] mmcblk0: command error, retrying timeout
[   13.758246  ] mmcblk0: timed out sending SET_BLOCK_COUNT command,card
status 0x400e00

(cherry picked from commit 87a18a6a56)

Change-Id: I7e1b0f0001639e0b43d4a6951148ed5f625e18dd
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
This commit is contained in:
Chaotian Jing
2016-05-19 16:47:40 +08:00
committed by Ziyuan Xu
parent 6f3b9fbe7a
commit 32b3741eea
1 changed files with 16 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/mmc/core/mmc_ops.c
View File

@@ -490,6 +490,7 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
u32 status = 0;
bool use_r1b_resp = use_busy_signal;
bool expired = false;
bool busy = false;
mmc_retune_hold(host);
@@ -545,19 +546,24 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
/* Must check status to be sure of no errors. */
timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1;
do {
/*
* Due to the possibility of being preempted after
* sending the status command, check the expiration
* time first.
*/
expired = time_after(jiffies, timeout);
if (send_status) {
/*
* Due to the possibility of being preempted after
* sending the status command, check the expiration
* time first.
*/
expired = time_after(jiffies, timeout);
err = __mmc_send_status(card, &status, ignore_crc);
if (err)
goto out;
}
if ((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp)
break;
if (host->ops->card_busy) {
if (!host->ops->card_busy(host))
break;
busy = true;
}
if (mmc_host_is_spi(host))
break;
@@ -566,19 +572,20 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
* does'nt support MMC_CAP_WAIT_WHILE_BUSY, then we can only
* rely on waiting for the stated timeout to be sufficient.
*/
if (!send_status) {
if (!send_status && !host->ops->card_busy) {
mmc_delay(timeout_ms);
goto out;
}
/* Timeout if the device never leaves the program state. */
if (expired && R1_CURRENT_STATE(status) == R1_STATE_PRG) {
if (expired &&
(R1_CURRENT_STATE(status) == R1_STATE_PRG || busy)) {
pr_err("%s: Card stuck in programming state! %s\n",
mmc_hostname(host), __func__);
err = -ETIMEDOUT;
goto out;
}
} while (R1_CURRENT_STATE(status) == R1_STATE_PRG);
} while (R1_CURRENT_STATE(status) == R1_STATE_PRG || busy);
err = mmc_switch_status_error(host, status);
out: