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Revert "mmc: omap_hsmmc: Enable Auto CMD12"

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This patch reverts the commit dba3c29ea4.

After bisecting, this commit dba3c29 is found to ruin micro-SD card data
(writing incorrect file, or fs is corrupt after several times mount)
on the beagle-xm revB, and reverting the commit will fix the problem.

Also from TRM of OMAP3/OMAP4/DM37x, the below is mentioned about
the Auto CMD12 Enable bit.
        - SDIO does not support this feature.
        - SD card only.
Looks it is not suitable to always enable Auto CMD12 in host controller
driver.

Considered that the commit is not mature enough, so ask to revert it
first.

Cc: Balaji T K <balajitk@ti.com>
Cc: Venkatraman S <svenkatr@ti.com>
Buglink: https://lkml.org/lkml/2012/6/10/225
Reported-by: Paolo Pisati <p.pisati@gmail.com>
Reported-bisected-and-tested-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Acked-by: Venkatraman S <svenkatr@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Ming Lei 2012-06-22 18:49:35 +08:00 committed by Chris Ball
parent d380443cd0
commit fe85227347
1 changed files with 3 additions and 12 deletions
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15
drivers/mmc/host/omap_hsmmc.c
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@ -85,7 +85,6 @@
#define BRR_ENABLE (1 << 5)
#define DTO_ENABLE (1 << 20)
#define INIT_STREAM (1 << 1)
#define ACEN_ACMD12 (1 << 2)
#define DP_SELECT (1 << 21)
#define DDIR (1 << 4)
#define DMA_EN 0x1
@ -117,7 +116,6 @@
#define OMAP_MMC_MAX_CLOCK 52000000
#define DRIVER_NAME "omap_hsmmc"
#define AUTO_CMD12 (1 << 0) /* Auto CMD12 support */
/*
* One controller can have multiple slots, like on some omap boards using
* omap.c controller driver. Luckily this is not currently done on any known
@ -177,7 +175,6 @@ struct omap_hsmmc_host {
int reqs_blocked;
int use_reg;
int req_in_progress;
unsigned int flags;
struct omap_hsmmc_next next_data;
struct omap_mmc_platform_data *pdata;
@ -773,8 +770,6 @@ omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd,
cmdtype = 0x3;
cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22);
if ((host->flags & AUTO_CMD12) && mmc_op_multi(cmd->opcode))
cmdreg |= ACEN_ACMD12;
if (data) {
cmdreg |= DP_SELECT | MSBS | BCE;
@ -847,14 +842,11 @@ omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data)
else
data->bytes_xfered = 0;
if (data->stop && ((!(host->flags & AUTO_CMD12)) || data->error)) {
omap_hsmmc_start_command(host, data->stop, NULL);
} else {
if (data->stop)
data->stop->resp[0] = OMAP_HSMMC_READ(host->base,
RSP76);
if (!data->stop) {
omap_hsmmc_request_done(host, data->mrq);
return;
}
omap_hsmmc_start_command(host, data->stop, NULL);
}
/*
@ -1859,7 +1851,6 @@ static int __devinit omap_hsmmc_probe(struct platform_device *pdev)
host->mapbase = res->start + pdata->reg_offset;
host->base = ioremap(host->mapbase, SZ_4K);
host->power_mode = MMC_POWER_OFF;
host->flags = AUTO_CMD12;
host->next_data.cookie = 1;
platform_set_drvdata(pdev, host);