diff options
Diffstat (limited to 'sys/arm/freescale/imx/imx_sdhci.c')
| -rw-r--r-- | sys/arm/freescale/imx/imx_sdhci.c | 73 |
1 files changed, 66 insertions, 7 deletions
diff --git a/sys/arm/freescale/imx/imx_sdhci.c b/sys/arm/freescale/imx/imx_sdhci.c index baa9162..7c9af18 100644 --- a/sys/arm/freescale/imx/imx_sdhci.c +++ b/sys/arm/freescale/imx/imx_sdhci.c @@ -71,6 +71,7 @@ struct imx_sdhci_softc { uint32_t r1bfix_intmask; uint8_t r1bfix_type; uint8_t hwtype; + boolean_t force_card_present; }; #define R1BFIX_NONE 0 /* No fix needed at next interrupt. */ @@ -89,6 +90,27 @@ struct imx_sdhci_softc { #define SDHC_VEND_HCKEN (1 << 12) #define SDHC_VEND_PEREN (1 << 13) +#define SDHC_PRES_STATE 0x24 +#define SDHC_PRES_CIHB (1 << 0) +#define SDHC_PRES_CDIHB (1 << 1) +#define SDHC_PRES_DLA (1 << 2) +#define SDHC_PRES_SDSTB (1 << 3) +#define SDHC_PRES_IPGOFF (1 << 4) +#define SDHC_PRES_HCKOFF (1 << 5) +#define SDHC_PRES_PEROFF (1 << 6) +#define SDHC_PRES_SDOFF (1 << 7) +#define SDHC_PRES_WTA (1 << 8) +#define SDHC_PRES_RTA (1 << 9) +#define SDHC_PRES_BWEN (1 << 10) +#define SDHC_PRES_BREN (1 << 11) +#define SDHC_PRES_RTR (1 << 12) +#define SDHC_PRES_CINST (1 << 16) +#define SDHC_PRES_CDPL (1 << 18) +#define SDHC_PRES_WPSPL (1 << 19) +#define SDHC_PRES_CLSL (1 << 23) +#define SDHC_PRES_DLSL_SHIFT 24 +#define SDHC_PRES_DLSL_MASK (0xffU << SDHC_PRES_DLSL_SHIFT) + #define SDHC_PROT_CTRL 0x28 #define SDHC_PROT_LED (1 << 0) #define SDHC_PROT_WIDTH_1BIT (0 << 1) @@ -254,8 +276,8 @@ imx_sdhci_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off) wrk32 = RD4(sc, SDHC_VEND_SPEC); if (wrk32 & SDHC_VEND_FRC_SDCLK_ON) val32 |= SDHCI_CLOCK_INT_EN | SDHCI_CLOCK_CARD_EN; - wrk32 = RD4(sc, SDHCI_PRESENT_STATE); - if (wrk32 & 0x08) + wrk32 = RD4(sc, SDHC_PRES_STATE); + if (wrk32 & SDHC_PRES_SDSTB) val32 |= SDHCI_CLOCK_INT_STABLE; val32 |= sc->sdclockreg_freq_bits; return (val32); @@ -268,7 +290,9 @@ static uint32_t imx_sdhci_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off) { struct imx_sdhci_softc *sc = device_get_softc(dev); - uint32_t val32; + uint32_t val32, wrk32; + + val32 = RD4(sc, off); /* * The hardware leaves the base clock frequency out of the capabilities @@ -280,7 +304,6 @@ imx_sdhci_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off) * doesn't yet handle (1.8v, suspend/resume, etc). */ if (off == SDHCI_CAPABILITIES) { - val32 = RD4(sc, off); val32 &= ~SDHCI_CAN_VDD_180; val32 &= ~SDHCI_CAN_DO_SUSPEND; val32 |= SDHCI_CAN_DO_8BITBUS; @@ -288,14 +311,30 @@ imx_sdhci_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off) return (val32); } - val32 = RD4(sc, off); + /* + * The hardware moves bits around in the present state register to make + * room for all 8 data line state bits. To translate, mask out all the + * bits which are not in the same position in both registers (this also + * masks out some freescale-specific bits in locations defined as + * reserved by sdhci), then shift the data line and retune request bits + * down to their standard locations. + */ + if (off == SDHCI_PRESENT_STATE) { + wrk32 = val32; + val32 &= 0x000F0F07; + val32 |= (wrk32 >> 4) & SDHCI_STATE_DAT_MASK; + val32 |= (wrk32 >> 9) & SDHCI_RETUNE_REQUEST; + if (sc->force_card_present) + val32 |= SDHCI_CARD_PRESENT; + return (val32); + } /* * imx_sdhci_intr() can synthesize a DATA_END interrupt following a * command with an R1B response, mix it into the hardware status. */ if (off == SDHCI_INT_STATUS) { - val32 |= sc->r1bfix_intmask; + return (val32 | sc->r1bfix_intmask); } return val32; @@ -522,7 +561,7 @@ imx_sdhci_intr(void *arg) count = 0; /* XXX use a callout or something instead of busy-waiting. */ while (count < 250000 && - (RD4(sc, SDHCI_PRESENT_STATE) & SDHCI_DAT_ACTIVE)) { + (RD4(sc, SDHC_PRES_STATE) & SDHC_PRES_DLA)) { ++count; DELAY(1); } @@ -555,6 +594,7 @@ imx_sdhci_attach(device_t dev) { struct imx_sdhci_softc *sc = device_get_softc(dev); int rid, err; + phandle_t node; sc->dev = dev; @@ -621,6 +661,25 @@ imx_sdhci_attach(device_t dev) sdhci_init_slot(dev, &sc->slot, 0); + /* + * If the slot is flagged with the non-removable property, set our flag + * to always force the SDHCI_CARD_PRESENT bit on. + * + * XXX Workaround for gpio-based card detect... + * + * We don't have gpio support yet. If there's a cd-gpios property just + * force the SDHCI_CARD_PRESENT bit on for now. If there isn't really a + * card there it will fail to probe at the mmc layer and nothing bad + * happens except instantiating a /dev/mmcN device for an empty slot. + */ + node = ofw_bus_get_node(dev); + if (OF_hasprop(node, "non-removable")) + sc->force_card_present = true; + else if (OF_hasprop(node, "cd-gpios")) { + /* XXX put real gpio hookup here. */ + sc->force_card_present = true; + } + bus_generic_probe(dev); bus_generic_attach(dev); |
