From: Balaji T K <balajitk@xxxxxx>
Enable Auto-CMD12 for multi block read/write on HSMMC
Tested on OMAP4430, OMAP3430 and OMAP2430 SDP
Signed-off-by: Balaji T K <balajitk@xxxxxx>
---
drivers/mmc/host/omap_hsmmc.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index f29e1a2..b1e9be7 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -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 +842,16 @@ 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);
+
+ return;
}
/*
@@ -1826,6 +1836,7 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
host->mapbase = res->start;
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);
--
1.7.10.rc0.41.gfa678
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