mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
mmc: sdhci: Add sdhci_read_caps()
Add sdhci_read_caps() and __sdhci_read_caps() to make it easier for drivers to fix the version and capabilities registers. Pedantically, the SDHCI specification states that the capabilities registers are valid when the host controller resets the Software Reset For All bit. That requirement has always been satisfied by performing a reset at the start of initialization, and consequently that is now part of the new functions. Although the SDHCI_QUIRK_MISSING_CAPS quirk has not yet been removed, drivers that want to provide their own caps can now use these functions instead of that quirk. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
parent
28da35899e
commit
6132a3bf07
@ -2841,6 +2841,38 @@ static int sdhci_set_dma_mask(struct sdhci_host *host)
|
||||
return ret;
|
||||
}
|
||||
|
||||
void __sdhci_read_caps(struct sdhci_host *host, u16 *ver, u32 *caps, u32 *caps1)
|
||||
{
|
||||
u16 v;
|
||||
|
||||
if (host->read_caps)
|
||||
return;
|
||||
|
||||
host->read_caps = true;
|
||||
|
||||
if (debug_quirks)
|
||||
host->quirks = debug_quirks;
|
||||
|
||||
if (debug_quirks2)
|
||||
host->quirks2 = debug_quirks2;
|
||||
|
||||
sdhci_do_reset(host, SDHCI_RESET_ALL);
|
||||
|
||||
v = ver ? *ver : sdhci_readw(host, SDHCI_HOST_VERSION);
|
||||
host->version = (v & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
|
||||
|
||||
if (host->quirks & SDHCI_QUIRK_MISSING_CAPS)
|
||||
return;
|
||||
|
||||
host->caps = caps ? *caps : sdhci_readl(host, SDHCI_CAPABILITIES);
|
||||
|
||||
if (host->version < SDHCI_SPEC_300)
|
||||
return;
|
||||
|
||||
host->caps1 = caps1 ? *caps1 : sdhci_readl(host, SDHCI_CAPABILITIES_1);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(__sdhci_read_caps);
|
||||
|
||||
int sdhci_setup_host(struct sdhci_host *host)
|
||||
{
|
||||
struct mmc_host *mmc;
|
||||
@ -2856,29 +2888,15 @@ int sdhci_setup_host(struct sdhci_host *host)
|
||||
|
||||
mmc = host->mmc;
|
||||
|
||||
if (debug_quirks)
|
||||
host->quirks = debug_quirks;
|
||||
if (debug_quirks2)
|
||||
host->quirks2 = debug_quirks2;
|
||||
sdhci_read_caps(host);
|
||||
|
||||
override_timeout_clk = host->timeout_clk;
|
||||
|
||||
sdhci_do_reset(host, SDHCI_RESET_ALL);
|
||||
|
||||
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
|
||||
host->version = (host->version & SDHCI_SPEC_VER_MASK)
|
||||
>> SDHCI_SPEC_VER_SHIFT;
|
||||
if (host->version > SDHCI_SPEC_300) {
|
||||
pr_err("%s: Unknown controller version (%d). You may experience problems.\n",
|
||||
mmc_hostname(mmc), host->version);
|
||||
}
|
||||
|
||||
if (!(host->quirks & SDHCI_QUIRK_MISSING_CAPS)) {
|
||||
host->caps = sdhci_readl(host, SDHCI_CAPABILITIES);
|
||||
if (host->version >= SDHCI_SPEC_300)
|
||||
host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
|
||||
}
|
||||
|
||||
if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
|
||||
host->flags |= SDHCI_USE_SDMA;
|
||||
else if (!(host->caps & SDHCI_CAN_DO_SDMA))
|
||||
|
@ -492,6 +492,7 @@ struct sdhci_host {
|
||||
|
||||
u32 caps; /* CAPABILITY_0 */
|
||||
u32 caps1; /* CAPABILITY_1 */
|
||||
bool read_caps; /* Capability flags have been read */
|
||||
|
||||
unsigned int ocr_avail_sdio; /* OCR bit masks */
|
||||
unsigned int ocr_avail_sd;
|
||||
@ -648,6 +649,8 @@ static inline void *sdhci_priv(struct sdhci_host *host)
|
||||
}
|
||||
|
||||
extern void sdhci_card_detect(struct sdhci_host *host);
|
||||
extern void __sdhci_read_caps(struct sdhci_host *host, u16 *ver, u32 *caps,
|
||||
u32 *caps1);
|
||||
extern int sdhci_setup_host(struct sdhci_host *host);
|
||||
extern int __sdhci_add_host(struct sdhci_host *host);
|
||||
extern int sdhci_add_host(struct sdhci_host *host);
|
||||
@ -655,6 +658,11 @@ extern void sdhci_remove_host(struct sdhci_host *host, int dead);
|
||||
extern void sdhci_send_command(struct sdhci_host *host,
|
||||
struct mmc_command *cmd);
|
||||
|
||||
static inline void sdhci_read_caps(struct sdhci_host *host)
|
||||
{
|
||||
__sdhci_read_caps(host, NULL, NULL, NULL);
|
||||
}
|
||||
|
||||
static inline bool sdhci_sdio_irq_enabled(struct sdhci_host *host)
|
||||
{
|
||||
return !!(host->flags & SDHCI_SDIO_IRQ_ENABLED);
|
||||
|
Loading…
Reference in New Issue
Block a user