From 99ddffd8ef84c0389e31cb4b90d9e5415ea19cb0 Mon Sep 17 00:00:00 2001 From: Nicolas Ferre Date: Wed, 26 May 2010 14:41:59 -0700 Subject: [PATCH] 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 Reviewed-by: Haavard Skinnemoen Cc: Maciej Sosnowski Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/mmc/host/atmel-mci.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index df0e8a88d85f..f6013ccbc619 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; -- 2.20.1