diff options
| author | Philip Rakity <prakity@marvell.com> | 2012-06-27 21:49:27 -0700 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-07-22 15:25:44 -0400 |
| commit | bd6a8c30faf19b4e7abace93fb89efd6d72607ec (patch) | |
| tree | f527fbf080402c10f09076859156862fd49bf52a | |
| parent | 4dc5a79f1350718ac31e4ab87eebce112b117a34 (diff) | |
| download | lwn-bd6a8c30faf19b4e7abace93fb89efd6d72607ec.tar.gz lwn-bd6a8c30faf19b4e7abace93fb89efd6d72607ec.zip | |
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 <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 8 | ||||
| -rw-r--r-- | 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 f76736b50bc7..206b52fec443 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 e9051e1cb1ce..d989b511c9ab 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; |