forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

mmc: omap_hsmmc: Enable Auto CMD12

Browse source 
Enable Auto-CMD12 for multi block read/write on HSMMC.
Tested on OMAP4430, OMAP3430 and OMAP2430 SDP

Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Venkatraman S <svenkatr@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Balaji T K 2012-04-09 12:08:32 +05:30 • committed by Chris Ball
commit dba3c29ea4
1 changed files with 12 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

15
drivers/mmc/host/omap_hsmmc.c
View file

@ -85,6 +85,7 @@
#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
@ -115,6 +116,7 @@
#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
@ -175,6 +177,7 @@ 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;
@ -766,6 +769,8 @@ 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;
@ -837,11 +842,14 @@ omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data)
else
data->bytes_xfered = 0;
if (!data->stop) {
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);
omap_hsmmc_request_done(host, data->mrq);
return;
}
omap_hsmmc_start_command(host, data->stop, NULL);
}
/*
@ -1844,6 +1852,7 @@ 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);