Date: Fri, 19 Dec 2014 23:13:47 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r275944 - head/sys/arm/ti Message-ID: <201412192313.sBJNDlGE024150@svn.freebsd.org>
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Author: ian Date: Fri Dec 19 23:13:46 2014 New Revision: 275944 URL: https://svnweb.freebsd.org/changeset/base/275944 Log: Add code to set and reset open-drain mode on the bus when requested. Submitted by: Michal Meloun <meloun@miracle.cz> Modified: head/sys/arm/ti/ti_sdhci.c Modified: head/sys/arm/ti/ti_sdhci.c ============================================================================== --- head/sys/arm/ti/ti_sdhci.c Fri Dec 19 20:51:54 2014 (r275943) +++ head/sys/arm/ti/ti_sdhci.c Fri Dec 19 23:13:46 2014 (r275944) @@ -112,6 +112,7 @@ static struct ofw_compat_data compat_dat #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, devi 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, devi * 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)); }
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