From bd6a8c30faf19b4e7abace93fb89efd6d72607ec Mon Sep 17 00:00:00 2001 From: Philip Rakity Date: Wed, 27 Jun 2012 21:49:27 -0700 Subject: [PATCH] mmc: sdhci: Allow caps[1] to be set via SDHCI_QUIRK_MISSING_CAPS Currently only the capability_0 register can be set if SDHCI_QUIRK_MISSING_CAPS is defined. This is a problem when the capability_1 register also needs changing. Use the quirk SDHCI_QUIRK_MISSING_CAPS to allow both registers to be set. Redefining caps[1] is useful when the board design does not support 1.8v vccq so UHS modes are not available. The code that calls sdhci_add_host can then detect this condition and adjust the caps so the UHS mode will not be attempted on UHS cards. Signed-off-by: Philip Rakity Signed-off-by: Chris Ball --- drivers/mmc/host/sdhci.c | 8 +++++--- include/linux/mmc/sdhci.h | 3 ++- 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index f76736b..206b52f 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2584,7 +2584,7 @@ EXPORT_SYMBOL_GPL(sdhci_alloc_host); int sdhci_add_host(struct sdhci_host *host) { struct mmc_host *mmc; - u32 caps[2]; + u32 caps[2] = {0, 0}; u32 max_current_caps; unsigned int ocr_avail; int ret; @@ -2614,8 +2614,10 @@ int sdhci_add_host(struct sdhci_host *host) caps[0] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps : sdhci_readl(host, SDHCI_CAPABILITIES); - caps[1] = (host->version >= SDHCI_SPEC_300) ? - sdhci_readl(host, SDHCI_CAPABILITIES_1) : 0; + if (host->version >= SDHCI_SPEC_300) + caps[1] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? + host->caps1 : + sdhci_readl(host, SDHCI_CAPABILITIES_1); if (host->quirks & SDHCI_QUIRK_FORCE_DMA) host->flags |= SDHCI_USE_SDMA; diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h index e9051e1..d989b51 100644 --- a/include/linux/mmc/sdhci.h +++ b/include/linux/mmc/sdhci.h @@ -155,7 +155,8 @@ struct sdhci_host { struct timer_list timer; /* Timer for timeouts */ - unsigned int caps; /* Alternative capabilities */ + unsigned int caps; /* Alternative CAPABILITY_0 */ + unsigned int caps1; /* Alternative CAPABILITY_1 */ unsigned int ocr_avail_sdio; /* OCR bit masks */ unsigned int ocr_avail_sd; -- 2.7.4