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authorSarthak Garg <sartgarg@codeaurora.org>2021-08-06 12:24:59 +0530
committerUlf Hansson <ulf.hansson@linaro.org>2021-08-24 10:15:33 +0200
commite30314f255117f37412d41e918f941a9ae0835f3 (patch)
treedc1af0af34c13adefdc67cc3269ac47790c1714e /drivers
parent3ac5e45291f3f0d699a721357380d4593bc2dcb3 (diff)
mmc: sdhci: Introduce max_timeout_count variable in sdhci_host
Introduce max_timeout_count variable in the sdhci_host structure and use in timeout calculation. By default its set to 0xE (max timeout register value as per SDHC spec). But at the same time vendors drivers can update it if they support different max timeout register value than 0xE. Signed-off-by: Sarthak Garg <sartgarg@codeaurora.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/1628232901-30897-2-git-send-email-sartgarg@codeaurora.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/host/sdhci.c16
-rw-r--r--drivers/mmc/host/sdhci.h1
2 files changed, 10 insertions, 7 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index aba6e10b8605..613e1ab6cac4 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -934,21 +934,21 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd,
/*
* If the host controller provides us with an incorrect timeout
- * value, just skip the check and use 0xE. The hardware may take
+ * value, just skip the check and use the maximum. The hardware may take
* longer to time out, but that's much better than having a too-short
* timeout value.
*/
if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL)
- return 0xE;
+ return host->max_timeout_count;
/* Unspecified command, asume max */
if (cmd == NULL)
- return 0xE;
+ return host->max_timeout_count;
data = cmd->data;
/* Unspecified timeout, assume max */
if (!data && !cmd->busy_timeout)
- return 0xE;
+ return host->max_timeout_count;
/* timeout in us */
target_timeout = sdhci_target_timeout(host, cmd, data);
@@ -968,15 +968,15 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd,
while (current_timeout < target_timeout) {
count++;
current_timeout <<= 1;
- if (count >= 0xF)
+ if (count > host->max_timeout_count)
break;
}
- if (count >= 0xF) {
+ if (count > host->max_timeout_count) {
if (!(host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT))
DBG("Too large timeout 0x%x requested for CMD%d!\n",
count, cmd->opcode);
- count = 0xE;
+ count = host->max_timeout_count;
} else {
*too_big = false;
}
@@ -3940,6 +3940,8 @@ struct sdhci_host *sdhci_alloc_host(struct device *dev,
*/
host->adma_table_cnt = SDHCI_MAX_SEGS * 2 + 1;
+ host->max_timeout_count = 0xE;
+
return host;
}
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 074dc182b184..e8d04e42a5af 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -517,6 +517,7 @@ struct sdhci_host {
unsigned int max_clk; /* Max possible freq (MHz) */
unsigned int timeout_clk; /* Timeout freq (KHz) */
+ u8 max_timeout_count; /* Vendor specific max timeout count */
unsigned int clk_mul; /* Clock Muliplier value */
unsigned int clock; /* Current clock (MHz) */