提交 bd6a8c30 编写于 作者: P Philip Rakity 提交者: Chris Ball

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: NPhilip Rakity <prakity@marvell.com>
Signed-off-by: NChris Ball <cjb@laptop.org>
上级 4dc5a79f
......@@ -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;
......
......@@ -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;
......
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