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mmc: atmel-mci: enable SD high speed support

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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>
This commit is contained in:
Nicolas Ferre 2010-05-26 14:41:59 -07:00 committed by Linus Torvalds
parent 6dd6bca3fb
commit 99ddffd8ef
1 changed files with 19 additions and 3 deletions
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22
drivers/mmc/host/atmel-mci.c
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@ -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;