[PATCH] MMC: atmel-mci: enable SD high speed support

Nicolas Ferre
2010-04-19T09:00:59Z

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>
---
drivers/mmc/host/atmel-mci.c | 22 +++++++++++++++++++---
1 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 88be37d..4338750 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -951,10 +951,21 @@ 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 {
@@ -1051,8 +1062,11 @@ 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;
@@ -1563,6 +1577,8 @@ 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;

--
1.5.6.5