Date: Tue, 26 Apr 2016 12:02:36 +0000 (UTC) From: Jared McNeill <jmcneill@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r298630 - head/sys/arm/allwinner Message-ID: <201604261202.u3QC2aJm080939@repo.freebsd.org>
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Author: jmcneill Date: Tue Apr 26 12:02:36 2016 New Revision: 298630 URL: https://svnweb.freebsd.org/changeset/base/298630 Log: Add support for 8-bit eMMC. Set MMC_CAP_4_BIT_DATA and MMC_CAP_8_BIT_DATA based on the "bus-width" DT property and reduce maximum bus frequency from 52MHz to 50MHz to match the capabilities of the clock provider. Tested on a BananaPi BPI-M3 (A83T). Modified: head/sys/arm/allwinner/a10_mmc.c Modified: head/sys/arm/allwinner/a10_mmc.c ============================================================================== --- head/sys/arm/allwinner/a10_mmc.c Tue Apr 26 12:00:04 2016 (r298629) +++ head/sys/arm/allwinner/a10_mmc.c Tue Apr 26 12:02:36 2016 (r298630) @@ -152,8 +152,11 @@ a10_mmc_attach(device_t dev) struct a10_mmc_softc *sc; struct sysctl_ctx_list *ctx; struct sysctl_oid_list *tree; + uint32_t bus_width; + phandle_t node; int error; + node = ofw_bus_get_node(dev); sc = device_get_softc(dev); sc->a10_dev = dev; sc->a10_req = NULL; @@ -251,11 +254,18 @@ a10_mmc_attach(device_t dev) device_printf(sc->a10_dev, "DMA status: %s\n", a10_mmc_pio_mode ? "disabled" : "enabled"); + if (OF_getencprop(node, "bus-width", &bus_width, sizeof(uint32_t)) <= 0) + bus_width = 1; + sc->a10_host.f_min = 400000; - sc->a10_host.f_max = 52000000; + sc->a10_host.f_max = 50000000; sc->a10_host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340; - sc->a10_host.caps = MMC_CAP_4_BIT_DATA | MMC_CAP_HSPEED; sc->a10_host.mode = mode_sd; + sc->a10_host.caps = MMC_CAP_HSPEED; + if (bus_width >= 4) + sc->a10_host.caps |= MMC_CAP_4_BIT_DATA; + if (bus_width >= 8) + sc->a10_host.caps |= MMC_CAP_8_BIT_DATA; child = device_add_child(dev, "mmc", -1); if (child == NULL) {
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