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Add code to set and reset open-drain mode on the bus when requested.

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Submitted by:	Michal Meloun <meloun@miracle.cz>
This commit is contained in:
ian 2014-12-19 23:13:46 +00:00
parent df0aca7fc1
commit e666523a3e
1 changed files with 14 additions and 3 deletions
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17
sys/arm/ti/ti_sdhci.c
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@ -112,6 +112,7 @@ static struct ofw_compat_data compat_data[] = {
#define MMCHS_CON 0x02C
#define MMCHS_CON_DW8 (1 << 5)
#define MMCHS_CON_DVAL_8_4MS (3 << 9)
#define MMCHS_CON_OD (1 << 0)
#define MMCHS_SYSCTL 0x12C
#define MMCHS_SYSCTL_CLKD_MASK 0x3FF
#define MMCHS_SYSCTL_CLKD_SHIFT 6
@ -327,7 +328,7 @@ ti_sdhci_update_ios(device_t brdev, device_t reqdev)
struct ti_sdhci_softc *sc = device_get_softc(brdev);
struct sdhci_slot *slot;
struct mmc_ios *ios;
uint32_t val32;
uint32_t val32, newval32;
slot = device_get_ivars(reqdev);
ios = &slot->host.ios;
@ -339,10 +340,20 @@ ti_sdhci_update_ios(device_t brdev, device_t reqdev)
* requested, then let the standard driver handle everything else.
*/
val32 = ti_mmchs_read_4(sc, MMCHS_CON);
newval32 = val32;
if (ios->bus_width == bus_width_8)
ti_mmchs_write_4(sc, MMCHS_CON, val32 | MMCHS_CON_DW8);
newval32 |= MMCHS_CON_DW8;
else
ti_mmchs_write_4(sc, MMCHS_CON, val32 & ~MMCHS_CON_DW8);
newval32 &= ~MMCHS_CON_DW8;
if (ios->bus_mode == opendrain)
newval32 |= MMCHS_CON_OD;
else /* if (ios->bus_mode == pushpull) */
newval32 &= ~MMCHS_CON_OD;
if (newval32 != val32)
ti_mmchs_write_4(sc, MMCHS_CON, newval32);
return (sdhci_generic_update_ios(brdev, reqdev));
}