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authorNicolas Ferre <nicolas.ferre@atmel.com>2010-05-26 14:41:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-27 09:12:39 -0700
commit99ddffd8ef84c0389e31cb4b90d9e5415ea19cb0 (patch)
tree75821d731ab191fd5d1475e83e955397b6ce6c6a /drivers/mmc
parent6dd6bca3fb6d4f186cdc67ba9e3949ef456dcc53 (diff)
mmc: atmel-mci: enable SD high speed support
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@atmel.com> Reviewed-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: Maciej Sosnowski <maciej.sosnowski@intel.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/atmel-mci.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index df0e8a88d85..f6013ccbc61 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -952,10 +952,21 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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 atmel_mci *host, struct mmc_request *mrq)
* 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 atmel_mci *host,
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;