From: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
Enable high speed support for atmel-mci driver. This support is dependent
of the revision of the IP and, of course, the capacity of the SD card
used.
Signed-off-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
Reviewed-by: Haavard Skinnemoen <haavard.skinnemoen@xxxxxxxxx>
Cc: Maciej Sosnowski <maciej.sosnowski@xxxxxxxxx>
Cc: <linux-mmc@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/atmel-mci.c | 22 +++++++++++++++++++---
1 file changed, 19 insertions(+), 3 deletions(-)
diff -puN drivers/mmc/host/atmel-mci.c~mmc-atmel-mci-enable-sd-high-speed-support drivers/mmc/host/atmel-mci.c
--- a/drivers/mmc/host/atmel-mci.c~mmc-atmel-mci-enable-sd-high-speed-support
+++ a/drivers/mmc/host/atmel-mci.c
@@ -952,10 +952,21 @@ static void atmci_set_ios(struct mmc_hos
if (mci_has_rwproof())
host->mode_reg |= (MCI_MR_WRPROOF | MCI_MR_RDPROOF);
- if (list_empty(&host->queue))
+ if (atmci_is_mci2()) {
+ /* setup High Speed mode in relation with card capacity */
+ if (ios->timing == MMC_TIMING_SD_HS)
+ host->cfg_reg |= MCI_CFG_HSMODE;
+ else
+ host->cfg_reg &= ~MCI_CFG_HSMODE;
+ }
+
+ if (list_empty(&host->queue)) {
mci_writel(host, MR, host->mode_reg);
- else
+ if (atmci_is_mci2())
+ mci_writel(host, CFG, host->cfg_reg);
+ } else {
host->need_clock_update = true;
+ }
spin_unlock_bh(&host->lock);
} else {
@@ -1052,8 +1063,11 @@ static void atmci_request_end(struct atm
* necessary if set_ios() is called when a different slot is
* busy transfering data.
*/
- if (host->need_clock_update)
+ if (host->need_clock_update) {
mci_writel(host, MR, host->mode_reg);
+ if (atmci_is_mci2())
+ mci_writel(host, CFG, host->cfg_reg);
+ }
host->cur_slot->mrq = NULL;
host->mrq = NULL;
@@ -1565,6 +1579,8 @@ static int __init atmci_init_slot(struct
mmc->f_min = DIV_ROUND_UP(host->bus_hz, 512);
mmc->f_max = host->bus_hz / 2;
mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
+ if (atmci_is_mci2())
+ mmc->caps |= MMC_CAP_SD_HIGHSPEED;
if (slot_data->bus_width >= 4)
mmc->caps |= MMC_CAP_4_BIT_DATA;
_
--
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