/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2020 - 2021 Alstom Group. * Copyright (c) 2020 - 2021 Semihalf. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* eSDHC controller driver for NXP QorIQ Layerscape SoCs. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mmcbr_if.h" #include "sdhci_if.h" #include "syscon_if.h" #define RD4 (sc->read) #define WR4 (sc->write) #define SDHCI_FSL_PRES_STATE 0x24 #define SDHCI_FSL_PRES_SDSTB (1 << 3) #define SDHCI_FSL_PRES_COMPAT_MASK 0x000f0f07 #define SDHCI_FSL_PROT_CTRL 0x28 #define SDHCI_FSL_PROT_CTRL_WIDTH_1BIT (0 << 1) #define SDHCI_FSL_PROT_CTRL_WIDTH_4BIT (1 << 1) #define SDHCI_FSL_PROT_CTRL_WIDTH_8BIT (2 << 1) #define SDHCI_FSL_PROT_CTRL_WIDTH_MASK (3 << 1) #define SDHCI_FSL_PROT_CTRL_BYTE_SWAP (0 << 4) #define SDHCI_FSL_PROT_CTRL_BYTE_NATIVE (2 << 4) #define SDHCI_FSL_PROT_CTRL_BYTE_MASK (3 << 4) #define SDHCI_FSL_PROT_CTRL_DMA_MASK (3 << 8) #define SDHCI_FSL_PROT_CTRL_VOLT_SEL (1 << 10) #define SDHCI_FSL_IRQSTAT 0x30 #define SDHCI_FSL_IRQSTAT_BRR (1 << 5) #define SDHCI_FSL_IRQSTAT_CINTSEN (1 << 8) #define SDHCI_FSL_IRQSTAT_RTE (1 << 12) #define SDHCI_FSL_IRQSTAT_TNE (1 << 26) #define SDHCI_FSL_SYS_CTRL 0x2c #define SDHCI_FSL_CLK_IPGEN (1 << 0) #define SDHCI_FSL_CLK_SDCLKEN (1 << 3) #define SDHCI_FSL_CLK_DIVIDER_MASK 0x000000f0 #define SDHCI_FSL_CLK_DIVIDER_SHIFT 4 #define SDHCI_FSL_CLK_PRESCALE_MASK 0x0000ff00 #define SDHCI_FSL_CLK_PRESCALE_SHIFT 8 #define SDHCI_FSL_WTMK_LVL 0x44 #define SDHCI_FSL_WTMK_RD_512B (0 << 0) #define SDHCI_FSL_WTMK_WR_512B (0 << 15) #define SDHCI_FSL_AUTOCERR 0x3C #define SDHCI_FSL_AUTOCERR_UHMS_HS200 (3 << 16) #define SDHCI_FSL_AUTOCERR_UHMS (7 << 16) #define SDHCI_FSL_AUTOCERR_EXTN (1 << 22) #define SDHCI_FSL_AUTOCERR_SMPCLKSEL (1 << 23) #define SDHCI_FSL_AUTOCERR_UHMS_SHIFT 16 #define SDHCI_FSL_HOST_VERSION 0xfc #define SDHCI_FSL_VENDOR_V23 0x13 #define SDHCI_FSL_CAPABILITIES2 0x114 #define SDHCI_FSL_TBCTL 0x120 #define SDHCI_FSL_TBSTAT 0x124 #define SDHCI_FSL_TBCTL_TBEN (1 << 2) #define SDHCI_FSL_TBCTL_HS400_EN (1 << 4) #define SDHCI_FSL_TBCTL_SAMP_CMD_DQS (1 << 5) #define SDHCI_FSL_TBCTL_HS400_WND_ADJ (1 << 6) #define SDHCI_FSL_TBCTL_TB_MODE_MASK 0x3 #define SDHCI_FSL_TBCTL_MODE_1 0 #define SDHCI_FSL_TBCTL_MODE_2 1 #define SDHCI_FSL_TBCTL_MODE_3 2 #define SDHCI_FSL_TBCTL_MODE_SW 3 #define SDHCI_FSL_TBPTR 0x128 #define SDHCI_FSL_TBPTR_WND_START_SHIFT 8 #define SDHCI_FSL_TBPTR_WND_MASK 0x7F #define SDHCI_FSL_SDCLKCTL 0x144 #define SDHCI_FSL_SDCLKCTL_CMD_CLK_CTL (1 << 15) #define SDHCI_FSL_SDCLKCTL_LPBK_CLK_SEL (1 << 31) #define SDHCI_FSL_SDTIMINGCTL 0x148 #define SDHCI_FSL_SDTIMINGCTL_FLW_CTL (1 << 15) #define SDHCI_FSL_DLLCFG0 0x160 #define SDHCI_FSL_DLLCFG0_FREQ_SEL (1 << 27) #define SDHCI_FSL_DLLCFG0_RESET (1 << 30) #define SDHCI_FSL_DLLCFG0_EN (1 << 31) #define SDHCI_FSL_DLLCFG1 0x164 #define SDHCI_FSL_DLLCFG1_PULSE_STRETCH (1 << 31) #define SDHCI_FSL_DLLSTAT0 0x170 #define SDHCI_FSL_DLLSTAT0_SLV_STS (1 << 27) #define SDHCI_FSL_ESDHC_CTRL 0x40c #define SDHCI_FSL_ESDHC_CTRL_SNOOP (1 << 6) #define SDHCI_FSL_ESDHC_CTRL_FAF (1 << 18) #define SDHCI_FSL_ESDHC_CTRL_CLK_DIV2 (1 << 19) #define SCFG_SDHCIOVSELCR 0x408 #define SCFG_SDHCIOVSELCR_TGLEN (1 << 0) #define SCFG_SDHCIOVSELCR_VS (1 << 31) #define SCFG_SDHCIOVSELCR_VSELVAL_MASK (3 << 1) #define SCFG_SDHCIOVSELCR_VSELVAL_1_8 0x0 #define SCFG_SDHCIOVSELCR_VSELVAL_3_3 0x2 #define SDHCI_FSL_CAN_VDD_MASK \ (SDHCI_CAN_VDD_180 | SDHCI_CAN_VDD_300 | SDHCI_CAN_VDD_330) /* Some platforms do not detect pulse width correctly. */ #define SDHCI_FSL_UNRELIABLE_PULSE_DET (1 << 0) /* On some platforms switching voltage to 1.8V is not supported */ #define SDHCI_FSL_UNSUPP_1_8V (1 << 1) /* Hardware tuning can fail, fallback to SW tuning in that case. */ #define SDHCI_FSL_TUNING_ERRATUM_TYPE1 (1 << 2) /* * Pointer window might not be set properly on some platforms. * Check window and perform SW tuning. */ #define SDHCI_FSL_TUNING_ERRATUM_TYPE2 (1 << 3) /* * In HS400 mode only 4, 8, 12 clock dividers can be used. * Use the smallest value, bigger than requested in that case. */ #define SDHCI_FSL_HS400_LIMITED_CLK_DIV (1 << 4) /* * Some SoCs don't have a fixed regulator. Switching voltage * requires special routine including syscon registers. */ #define SDHCI_FSL_MISSING_VCCQ_REG (1 << 5) /* * HS400 tuning is done in HS200 mode, but it has to be done using * the target frequency. In order to apply the errata above we need to * know the target mode during tuning procedure. Use this flag for just that. */ #define SDHCI_FSL_HS400_FLAG (1 << 0) #define SDHCI_FSL_MAX_RETRIES 20000 /* DELAY(10) * this = 200ms */ struct sdhci_fsl_fdt_softc { device_t dev; const struct sdhci_fsl_fdt_soc_data *soc_data; struct resource *mem_res; struct resource *irq_res; void *irq_cookie; uint32_t baseclk_hz; uint32_t maxclk_hz; struct sdhci_fdt_gpio *gpio; struct sdhci_slot slot; bool slot_init_done; uint32_t cmd_and_mode; uint16_t sdclk_bits; struct mmc_helper fdt_helper; uint32_t div_ratio; uint8_t vendor_ver; uint32_t flags; uint32_t (* read)(struct sdhci_fsl_fdt_softc *, bus_size_t); void (* write)(struct sdhci_fsl_fdt_softc *, bus_size_t, uint32_t); }; struct sdhci_fsl_fdt_soc_data { int quirks; int baseclk_div; uint8_t errata; char *syscon_compat; }; static const struct sdhci_fsl_fdt_soc_data sdhci_fsl_fdt_ls1012a_soc_data = { .quirks = 0, .baseclk_div = 1, .errata = SDHCI_FSL_MISSING_VCCQ_REG | SDHCI_FSL_TUNING_ERRATUM_TYPE2, .syscon_compat = "fsl,ls1012a-scfg", }; static const struct sdhci_fsl_fdt_soc_data sdhci_fsl_fdt_ls1028a_soc_data = { .quirks = SDHCI_QUIRK_DONT_SET_HISPD_BIT | SDHCI_QUIRK_BROKEN_AUTO_STOP | SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK, .baseclk_div = 2, .errata = SDHCI_FSL_UNRELIABLE_PULSE_DET | SDHCI_FSL_HS400_LIMITED_CLK_DIV, }; static const struct sdhci_fsl_fdt_soc_data sdhci_fsl_fdt_ls1046a_soc_data = { .quirks = SDHCI_QUIRK_DONT_SET_HISPD_BIT | SDHCI_QUIRK_BROKEN_AUTO_STOP, .baseclk_div = 2, .errata = SDHCI_FSL_MISSING_VCCQ_REG | SDHCI_FSL_TUNING_ERRATUM_TYPE2, .syscon_compat = "fsl,ls1046a-scfg", }; static const struct sdhci_fsl_fdt_soc_data sdhci_fsl_fdt_lx2160a_soc_data = { .quirks = 0, .baseclk_div = 2, .errata = SDHCI_FSL_UNRELIABLE_PULSE_DET | SDHCI_FSL_HS400_LIMITED_CLK_DIV, }; static const struct sdhci_fsl_fdt_soc_data sdhci_fsl_fdt_gen_data = { .quirks = 0, .baseclk_div = 1, }; static const struct ofw_compat_data sdhci_fsl_fdt_compat_data[] = { {"fsl,ls1012a-esdhc", (uintptr_t)&sdhci_fsl_fdt_ls1012a_soc_data}, {"fsl,ls1028a-esdhc", (uintptr_t)&sdhci_fsl_fdt_ls1028a_soc_data}, {"fsl,ls1046a-esdhc", (uintptr_t)&sdhci_fsl_fdt_ls1046a_soc_data}, {"fsl,esdhc", (uintptr_t)&sdhci_fsl_fdt_gen_data}, {NULL, 0} }; static uint32_t read_be(struct sdhci_fsl_fdt_softc *sc, bus_size_t off) { return (be32toh(bus_read_4(sc->mem_res, off))); } static void write_be(struct sdhci_fsl_fdt_softc *sc, bus_size_t off, uint32_t val) { bus_write_4(sc->mem_res, off, htobe32(val)); } static uint32_t read_le(struct sdhci_fsl_fdt_softc *sc, bus_size_t off) { return (bus_read_4(sc->mem_res, off)); } static void write_le(struct sdhci_fsl_fdt_softc *sc, bus_size_t off, uint32_t val) { bus_write_4(sc->mem_res, off, val); } static uint16_t sdhci_fsl_fdt_get_clock(struct sdhci_fsl_fdt_softc *sc) { uint16_t val; val = sc->sdclk_bits | SDHCI_CLOCK_INT_EN; if (RD4(sc, SDHCI_FSL_PRES_STATE) & SDHCI_FSL_PRES_SDSTB) val |= SDHCI_CLOCK_INT_STABLE; if (RD4(sc, SDHCI_FSL_SYS_CTRL) & SDHCI_FSL_CLK_SDCLKEN) val |= SDHCI_CLOCK_CARD_EN; return (val); } /* * Calculate clock prescaler and divisor values based on the following formula: * `frequency = base clock / (prescaler * divisor)`. */ #define SDHCI_FSL_FDT_CLK_DIV(sc, base, freq, pre, div) \ do { \ (pre) = (sc)->vendor_ver < SDHCI_FSL_VENDOR_V23 ? 2 : 1;\ while ((freq) < (base) / ((pre) * 16) && (pre) < 256) \ (pre) <<= 1; \ /* div/pre can't both be set to 1, according to PM. */ \ (div) = ((pre) == 1 ? 2 : 1); \ while ((freq) < (base) / ((pre) * (div)) && (div) < 16) \ ++(div); \ } while (0) static void fsl_sdhc_fdt_set_clock(struct sdhci_fsl_fdt_softc *sc, struct sdhci_slot *slot, uint16_t val) { uint32_t prescale, div, val32, div_ratio; sc->sdclk_bits = val & SDHCI_DIVIDERS_MASK; val32 = RD4(sc, SDHCI_CLOCK_CONTROL); if ((val & SDHCI_CLOCK_CARD_EN) == 0) { WR4(sc, SDHCI_CLOCK_CONTROL, val32 & ~SDHCI_FSL_CLK_SDCLKEN); return; } /* * Ignore dividers provided by core in `sdhci_set_clock` and calculate * them anew with higher accuracy. */ SDHCI_FSL_FDT_CLK_DIV(sc, sc->baseclk_hz, slot->clock, prescale, div); div_ratio = prescale * div; /* * According to limited clock division erratum, clock dividers in hs400 * can be only 4, 8 or 12 */ if ((sc->soc_data->errata & SDHCI_FSL_HS400_LIMITED_CLK_DIV) && (sc->slot.host.ios.timing == bus_timing_mmc_hs400 || (sc->flags & SDHCI_FSL_HS400_FLAG))) { if (div_ratio <= 4) { prescale = 4; div = 1; } else if (div_ratio <= 8) { prescale = 4; div = 2; } else if (div_ratio <= 12) { prescale = 4; div = 3; } else { device_printf(sc->dev, "Unsupported clock divider.\n"); } } sc->div_ratio = prescale * div; if (bootverbose) device_printf(sc->dev, "Desired SD/MMC freq: %d, actual: %d; base %d prescale %d divisor %d\n", slot->clock, sc->baseclk_hz / (prescale * div), sc->baseclk_hz, prescale, div); prescale >>= 1; div -= 1; val32 &= ~(SDHCI_FSL_CLK_DIVIDER_MASK | SDHCI_FSL_CLK_PRESCALE_MASK); val32 |= div << SDHCI_FSL_CLK_DIVIDER_SHIFT; val32 |= prescale << SDHCI_FSL_CLK_PRESCALE_SHIFT; val32 |= SDHCI_FSL_CLK_IPGEN | SDHCI_FSL_CLK_SDCLKEN; WR4(sc, SDHCI_CLOCK_CONTROL, val32); } static uint8_t sdhci_fsl_fdt_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off) { struct sdhci_fsl_fdt_softc *sc; uint32_t wrk32, val32; sc = device_get_softc(dev); switch (off) { case SDHCI_HOST_CONTROL: wrk32 = RD4(sc, SDHCI_FSL_PROT_CTRL); val32 = wrk32 & (SDHCI_CTRL_LED | SDHCI_CTRL_CARD_DET | SDHCI_CTRL_FORCE_CARD); if (wrk32 & SDHCI_FSL_PROT_CTRL_WIDTH_4BIT) val32 |= SDHCI_CTRL_4BITBUS; else if (wrk32 & SDHCI_FSL_PROT_CTRL_WIDTH_8BIT) val32 |= SDHCI_CTRL_8BITBUS; return (val32); case SDHCI_POWER_CONTROL: return (SDHCI_POWER_ON | SDHCI_POWER_300); default: break; } return ((RD4(sc, off & ~3) >> (off & 3) * 8) & UINT8_MAX); } static uint16_t sdhci_fsl_fdt_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off) { struct sdhci_fsl_fdt_softc *sc; uint32_t val32; sc = device_get_softc(dev); switch (off) { case SDHCI_CLOCK_CONTROL: return (sdhci_fsl_fdt_get_clock(sc)); case SDHCI_HOST_VERSION: return (RD4(sc, SDHCI_FSL_HOST_VERSION) & UINT16_MAX); case SDHCI_TRANSFER_MODE: return (sc->cmd_and_mode & UINT16_MAX); case SDHCI_COMMAND_FLAGS: return (sc->cmd_and_mode >> 16); case SDHCI_SLOT_INT_STATUS: /* * eSDHC hardware manages only a single slot. * Synthesize a slot interrupt status register for slot 1 below. */ val32 = RD4(sc, SDHCI_INT_STATUS); val32 &= RD4(sc, SDHCI_SIGNAL_ENABLE); return (!!val32); default: return ((RD4(sc, off & ~3) >> (off & 3) * 8) & UINT16_MAX); } } static uint32_t sdhci_fsl_fdt_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off) { struct sdhci_fsl_fdt_softc *sc; uint32_t wrk32, val32; sc = device_get_softc(dev); if (off == SDHCI_BUFFER) return (bus_read_4(sc->mem_res, off)); if (off == SDHCI_CAPABILITIES2) off = SDHCI_FSL_CAPABILITIES2; val32 = RD4(sc, off); if (off == SDHCI_PRESENT_STATE) { wrk32 = val32; val32 &= SDHCI_FSL_PRES_COMPAT_MASK; val32 |= (wrk32 >> 4) & SDHCI_STATE_DAT_MASK; val32 |= (wrk32 << 1) & SDHCI_STATE_CMD; } return (val32); } static void sdhci_fsl_fdt_read_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint32_t *data, bus_size_t count) { struct sdhci_fsl_fdt_softc *sc; sc = device_get_softc(dev); bus_read_multi_4(sc->mem_res, off, data, count); } static void sdhci_fsl_fdt_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint8_t val) { struct sdhci_fsl_fdt_softc *sc; uint32_t val32; sc = device_get_softc(dev); switch (off) { case SDHCI_HOST_CONTROL: val32 = RD4(sc, SDHCI_FSL_PROT_CTRL); val32 &= ~SDHCI_FSL_PROT_CTRL_WIDTH_MASK; val32 |= (val & SDHCI_CTRL_LED); if (val & SDHCI_CTRL_8BITBUS) val32 |= SDHCI_FSL_PROT_CTRL_WIDTH_8BIT; else /* Bus width is 1-bit when this flag is not set. */ val32 |= (val & SDHCI_CTRL_4BITBUS); /* Enable SDMA by masking out this field. */ val32 &= ~SDHCI_FSL_PROT_CTRL_DMA_MASK; val32 &= ~(SDHCI_CTRL_CARD_DET | SDHCI_CTRL_FORCE_CARD); val32 |= (val & (SDHCI_CTRL_CARD_DET | SDHCI_CTRL_FORCE_CARD)); WR4(sc, SDHCI_FSL_PROT_CTRL, val32); return; case SDHCI_POWER_CONTROL: return; default: val32 = RD4(sc, off & ~3); val32 &= ~(UINT8_MAX << (off & 3) * 8); val32 |= (val << (off & 3) * 8); WR4(sc, off & ~3, val32); return; } } static void sdhci_fsl_fdt_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint16_t val) { struct sdhci_fsl_fdt_softc *sc; uint32_t val32; sc = device_get_softc(dev); switch (off) { case SDHCI_CLOCK_CONTROL: fsl_sdhc_fdt_set_clock(sc, slot, val); return; /* * eSDHC hardware combines command and mode into a single * register. Cache it here, so that command isn't written * until after mode. */ case SDHCI_TRANSFER_MODE: sc->cmd_and_mode = val; return; case SDHCI_COMMAND_FLAGS: sc->cmd_and_mode = (sc->cmd_and_mode & UINT16_MAX) | (val << 16); WR4(sc, SDHCI_TRANSFER_MODE, sc->cmd_and_mode); sc->cmd_and_mode = 0; return; case SDHCI_HOST_CONTROL2: /* * Switching to HS400 requires a special procedure, * which is done in sdhci_fsl_fdt_set_uhs_timing. */ if ((val & SDHCI_CTRL2_UHS_MASK) == SDHCI_CTRL2_MMC_HS400) val &= ~SDHCI_CTRL2_MMC_HS400; default: val32 = RD4(sc, off & ~3); val32 &= ~(UINT16_MAX << (off & 3) * 8); val32 |= ((val & UINT16_MAX) << (off & 3) * 8); WR4(sc, off & ~3, val32); return; } } static void sdhci_fsl_fdt_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint32_t val) { struct sdhci_fsl_fdt_softc *sc; sc = device_get_softc(dev); switch (off) { case SDHCI_BUFFER: bus_write_4(sc->mem_res, off, val); return; /* * eSDHC hardware lacks support for the SDMA buffer boundary * feature and instead generates SDHCI_INT_DMA_END interrupts * after each completed DMA data transfer. * Since this duplicates the SDHCI_INT_DATA_END functionality, * mask out the unneeded SDHCI_INT_DMA_END interrupt. */ case SDHCI_INT_ENABLE: case SDHCI_SIGNAL_ENABLE: val &= ~SDHCI_INT_DMA_END; /* FALLTHROUGH. */ default: WR4(sc, off, val); return; } } static void sdhci_fsl_fdt_write_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint32_t *data, bus_size_t count) { struct sdhci_fsl_fdt_softc *sc; sc = device_get_softc(dev); bus_write_multi_4(sc->mem_res, off, data, count); } static void sdhci_fsl_fdt_irq(void *arg) { struct sdhci_fsl_fdt_softc *sc; sc = arg; sdhci_generic_intr(&sc->slot); return; } static int sdhci_fsl_fdt_update_ios(device_t brdev, device_t reqdev) { int err; struct sdhci_fsl_fdt_softc *sc; struct mmc_ios *ios; struct sdhci_slot *slot; err = sdhci_generic_update_ios(brdev, reqdev); if (err != 0) return (err); sc = device_get_softc(brdev); slot = device_get_ivars(reqdev); ios = &slot->host.ios; switch (ios->power_mode) { case power_on: break; case power_off: if (bootverbose) device_printf(sc->dev, "Powering down sd/mmc\n"); if (sc->fdt_helper.vmmc_supply) regulator_disable(sc->fdt_helper.vmmc_supply); if (sc->fdt_helper.vqmmc_supply) regulator_disable(sc->fdt_helper.vqmmc_supply); break; case power_up: if (bootverbose) device_printf(sc->dev, "Powering up sd/mmc\n"); if (sc->fdt_helper.vmmc_supply) regulator_enable(sc->fdt_helper.vmmc_supply); if (sc->fdt_helper.vqmmc_supply) regulator_enable(sc->fdt_helper.vqmmc_supply); break; }; return (0); } static int sdhci_fsl_fdt_switch_syscon_voltage(device_t dev, struct sdhci_fsl_fdt_softc *sc, enum mmc_vccq vccq) { struct syscon *syscon; phandle_t syscon_node; uint32_t reg; if (sc->soc_data->syscon_compat == NULL) { device_printf(dev, "Empty syscon compat string.\n"); return (ENXIO); } syscon_node = ofw_bus_find_compatible(OF_finddevice("/"), sc->soc_data->syscon_compat); if (syscon_get_by_ofw_node(dev, syscon_node, &syscon) != 0) { device_printf(dev, "Could not find syscon node.\n"); return (ENXIO); } reg = SYSCON_READ_4(syscon, SCFG_SDHCIOVSELCR); reg &= ~SCFG_SDHCIOVSELCR_VSELVAL_MASK; reg |= SCFG_SDHCIOVSELCR_TGLEN; switch (vccq) { case vccq_180: reg |= SCFG_SDHCIOVSELCR_VSELVAL_1_8; SYSCON_WRITE_4(syscon, SCFG_SDHCIOVSELCR, reg); DELAY(5000); reg = SYSCON_READ_4(syscon, SCFG_SDHCIOVSELCR); reg |= SCFG_SDHCIOVSELCR_VS; break; case vccq_330: reg |= SCFG_SDHCIOVSELCR_VSELVAL_3_3; SYSCON_WRITE_4(syscon, SCFG_SDHCIOVSELCR, reg); DELAY(5000); reg = SYSCON_READ_4(syscon, SCFG_SDHCIOVSELCR); reg &= ~SCFG_SDHCIOVSELCR_VS; break; default: device_printf(dev, "Unsupported voltage requested.\n"); return (ENXIO); } SYSCON_WRITE_4(syscon, SCFG_SDHCIOVSELCR, reg); return (0); } static int sdhci_fsl_fdt_switch_vccq(device_t brdev, device_t reqdev) { struct sdhci_fsl_fdt_softc *sc; struct sdhci_slot *slot; regulator_t vqmmc_supply; uint32_t val_old, val; int uvolt, err = 0; sc = device_get_softc(brdev); slot = device_get_ivars(reqdev); val_old = val = RD4(sc, SDHCI_FSL_PROT_CTRL); switch (slot->host.ios.vccq) { case vccq_180: if (sc->soc_data->errata & SDHCI_FSL_UNSUPP_1_8V) return (EOPNOTSUPP); val |= SDHCI_FSL_PROT_CTRL_VOLT_SEL; uvolt = 1800000; break; case vccq_330: val &= ~SDHCI_FSL_PROT_CTRL_VOLT_SEL; uvolt = 3300000; break; default: return (EOPNOTSUPP); } WR4(sc, SDHCI_FSL_PROT_CTRL, val); if (sc->soc_data->errata & SDHCI_FSL_MISSING_VCCQ_REG) { err = sdhci_fsl_fdt_switch_syscon_voltage(brdev, sc, slot->host.ios.vccq); if (err != 0) goto vccq_fail; } vqmmc_supply = sc->fdt_helper.vqmmc_supply; /* * Even though we expect to find a fixed regulator in this controller * family, let's play safe. */ if (vqmmc_supply != NULL) { err = regulator_set_voltage(vqmmc_supply, uvolt, uvolt); if (err != 0) goto vccq_fail; } return (0); vccq_fail: device_printf(sc->dev, "Cannot set vqmmc to %d<->%d\n", uvolt, uvolt); WR4(sc, SDHCI_FSL_PROT_CTRL, val_old); return (err); } static int sdhci_fsl_fdt_get_ro(device_t bus, device_t child) { struct sdhci_fsl_fdt_softc *sc; sc = device_get_softc(bus); return (sdhci_fdt_gpio_get_readonly(sc->gpio)); } static bool sdhci_fsl_fdt_get_card_present(device_t dev, struct sdhci_slot *slot) { struct sdhci_fsl_fdt_softc *sc; sc = device_get_softc(dev); return (sdhci_fdt_gpio_get_present(sc->gpio)); } static uint32_t sdhci_fsl_fdt_vddrange_to_mask(device_t dev, uint32_t *vdd_ranges, int len) { uint32_t vdd_min, vdd_max; uint32_t vdd_mask = 0; int i; /* Ranges are organized as pairs of values. */ if ((len % 2) != 0) { device_printf(dev, "Invalid voltage range\n"); return (0); } len = len / 2; for (i = 0; i < len; i++) { vdd_min = vdd_ranges[2 * i]; vdd_max = vdd_ranges[2 * i + 1]; if (vdd_min > vdd_max || vdd_min < 1650 || vdd_min > 3600 || vdd_max < 1650 || vdd_max > 3600) { device_printf(dev, "Voltage range %d - %d is out of bounds\n", vdd_min, vdd_max); return (0); } if (vdd_min <= 1800 && vdd_max >= 1800) vdd_mask |= SDHCI_CAN_VDD_180; if (vdd_min <= 3000 && vdd_max >= 3000) vdd_mask |= SDHCI_CAN_VDD_300; if (vdd_min <= 3300 && vdd_max >= 3300) vdd_mask |= SDHCI_CAN_VDD_330; } return (vdd_mask); } static void sdhci_fsl_fdt_of_parse(device_t dev) { struct sdhci_fsl_fdt_softc *sc; phandle_t node; pcell_t *voltage_ranges; uint32_t vdd_mask = 0; ssize_t num_ranges; sc = device_get_softc(dev); node = ofw_bus_get_node(dev); /* Call mmc_fdt_parse in order to get mmc related properties. */ mmc_fdt_parse(dev, node, &sc->fdt_helper, &sc->slot.host); sc->slot.quirks |= SDHCI_QUIRK_MISSING_CAPS; sc->slot.caps = sdhci_fsl_fdt_read_4(dev, &sc->slot, SDHCI_CAPABILITIES) & ~(SDHCI_CAN_DO_SUSPEND); sc->slot.caps2 = sdhci_fsl_fdt_read_4(dev, &sc->slot, SDHCI_CAPABILITIES2); /* Parse the "voltage-ranges" dts property. */ num_ranges = OF_getencprop_alloc(node, "voltage-ranges", (void **) &voltage_ranges); if (num_ranges <= 0) return; vdd_mask = sdhci_fsl_fdt_vddrange_to_mask(dev, voltage_ranges, num_ranges / sizeof(uint32_t)); OF_prop_free(voltage_ranges); /* Overwrite voltage caps only if we got something from dts. */ if (vdd_mask != 0 && (vdd_mask != (sc->slot.caps & SDHCI_FSL_CAN_VDD_MASK))) { sc->slot.caps &= ~(SDHCI_FSL_CAN_VDD_MASK); sc->slot.caps |= vdd_mask; } } static int sdhci_fsl_poll_register(struct sdhci_fsl_fdt_softc *sc, uint32_t reg, uint32_t mask, int value) { int retries; retries = SDHCI_FSL_MAX_RETRIES; while ((RD4(sc, reg) & mask) != value) { if (!retries--) return (ENXIO); DELAY(10); } return (0); } static int sdhci_fsl_fdt_attach(device_t dev) { struct sdhci_fsl_fdt_softc *sc; struct mmc_host *host; uint32_t val, buf_order; uintptr_t ocd_data; uint64_t clk_hz; phandle_t node; int rid, ret; clk_t clk; node = ofw_bus_get_node(dev); sc = device_get_softc(dev); ocd_data = ofw_bus_search_compatible(dev, sdhci_fsl_fdt_compat_data)->ocd_data; sc->dev = dev; sc->flags = 0; host = &sc->slot.host; rid = 0; /* * LX2160A needs its own soc_data in order to apply SoC * specific quriks. Since the controller is identified * only with a generic compatible string we need to do this dance here. */ if (ofw_bus_node_is_compatible(OF_finddevice("/"), "fsl,lx2160a")) sc->soc_data = &sdhci_fsl_fdt_lx2160a_soc_data; else sc->soc_data = (struct sdhci_fsl_fdt_soc_data *)ocd_data; sc->slot.quirks = sc->soc_data->quirks; sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); if (sc->mem_res == NULL) { device_printf(dev, "Could not allocate resources for controller\n"); return (ENOMEM); } rid = 0; sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); if (sc->irq_res == NULL) { device_printf(dev, "Could not allocate irq resources for controller\n"); ret = ENOMEM; goto err_free_mem; } ret = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_BIO | INTR_MPSAFE, NULL, sdhci_fsl_fdt_irq, sc, &sc->irq_cookie); if (ret != 0) { device_printf(dev, "Could not setup IRQ handler\n"); goto err_free_irq_res; } ret = clk_get_by_ofw_index(dev, node, 0, &clk); if (ret != 0) { device_printf(dev, "Parent clock not found\n"); goto err_free_irq; } ret = clk_get_freq(clk, &clk_hz); if (ret != 0) { device_printf(dev, "Could not get parent clock frequency\n"); goto err_free_irq; } sc->baseclk_hz = clk_hz / sc->soc_data->baseclk_div; /* Figure out eSDHC block endianness before we touch any HW regs. */ if (OF_hasprop(node, "little-endian")) { sc->read = read_le; sc->write = write_le; buf_order = SDHCI_FSL_PROT_CTRL_BYTE_NATIVE; } else { sc->read = read_be; sc->write = write_be; buf_order = SDHCI_FSL_PROT_CTRL_BYTE_SWAP; } sc->vendor_ver = (RD4(sc, SDHCI_FSL_HOST_VERSION) & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT; sdhci_fsl_fdt_of_parse(dev); sc->maxclk_hz = host->f_max ? host->f_max : sc->baseclk_hz; /* * Setting this register affects byte order in SDHCI_BUFFER only. * If the eSDHC block is connected over a big-endian bus, the data * read from/written to the buffer will be already byte swapped. * In such a case, setting SDHCI_FSL_PROT_CTRL_BYTE_SWAP will convert * the byte order again, resulting in a native byte order. * The read/write callbacks accommodate for this behavior. */ val = RD4(sc, SDHCI_FSL_PROT_CTRL); val &= ~SDHCI_FSL_PROT_CTRL_BYTE_MASK; WR4(sc, SDHCI_FSL_PROT_CTRL, val | buf_order); /* * Gate the SD clock and set its source to * peripheral clock / baseclk_div. The frequency in baseclk_hz is set * to match this. */ val = RD4(sc, SDHCI_CLOCK_CONTROL); WR4(sc, SDHCI_CLOCK_CONTROL, val & ~SDHCI_FSL_CLK_SDCLKEN); val = RD4(sc, SDHCI_FSL_ESDHC_CTRL); WR4(sc, SDHCI_FSL_ESDHC_CTRL, val | SDHCI_FSL_ESDHC_CTRL_CLK_DIV2); sc->slot.max_clk = sc->maxclk_hz; sc->gpio = sdhci_fdt_gpio_setup(dev, &sc->slot); /* * Set the buffer watermark level to 128 words (512 bytes) for both * read and write. The hardware has a restriction that when the read or * write ready status is asserted, that means you can read exactly the * number of words set in the watermark register before you have to * re-check the status and potentially wait for more data. The main * sdhci driver provides no hook for doing status checking on less than * a full block boundary, so we set the watermark level to be a full * block. Reads and writes where the block size is less than the * watermark size will work correctly too, no need to change the * watermark for different size blocks. However, 128 is the maximum * allowed for the watermark, so PIO is limitted to 512 byte blocks. */ WR4(sc, SDHCI_FSL_WTMK_LVL, SDHCI_FSL_WTMK_WR_512B | SDHCI_FSL_WTMK_RD_512B); ret = sdhci_init_slot(dev, &sc->slot, 0); if (ret != 0) goto err_free_gpio; sc->slot_init_done = true; sdhci_start_slot(&sc->slot); bus_attach_children(dev); return (0); err_free_gpio: sdhci_fdt_gpio_teardown(sc->gpio); err_free_irq: bus_teardown_intr(dev, sc->irq_res, sc->irq_cookie); err_free_irq_res: bus_free_resource(dev, SYS_RES_IRQ, sc->irq_res); err_free_mem: bus_free_resource(dev, SYS_RES_MEMORY, sc->mem_res); return (ret); } static int sdhci_fsl_fdt_detach(device_t dev) { struct sdhci_fsl_fdt_softc *sc; sc = device_get_softc(dev); if (sc->slot_init_done) sdhci_cleanup_slot(&sc->slot); if (sc->gpio != NULL) sdhci_fdt_gpio_teardown(sc->gpio); if (sc->irq_cookie != NULL) bus_teardown_intr(dev, sc->irq_res, sc->irq_cookie); if (sc->irq_res != NULL) bus_free_resource(dev, SYS_RES_IRQ, sc->irq_res); if (sc->mem_res != NULL) bus_free_resource(dev, SYS_RES_MEMORY, sc->mem_res); return (0); } static int sdhci_fsl_fdt_probe(device_t dev) { if (!ofw_bus_status_okay(dev)) return (ENXIO); if (!ofw_bus_search_compatible(dev, sdhci_fsl_fdt_compat_data)->ocd_data) return (ENXIO); device_set_desc(dev, "NXP QorIQ Layerscape eSDHC controller"); return (BUS_PROBE_DEFAULT); } static int sdhci_fsl_fdt_read_ivar(device_t bus, device_t child, int which, uintptr_t *result) { struct sdhci_slot *slot = device_get_ivars(child); if (which == MMCBR_IVAR_MAX_DATA && (slot->opt & SDHCI_HAVE_DMA)) { /* * In the absence of SDMA buffer boundary functionality, * limit the maximum data length per read/write command * to bounce buffer size. */ *result = howmany(slot->sdma_bbufsz, 512); return (0); } return (sdhci_generic_read_ivar(bus, child, which, result)); } static int sdhci_fsl_fdt_write_ivar(device_t bus, device_t child, int which, uintptr_t value) { struct sdhci_fsl_fdt_softc *sc; struct sdhci_slot *slot = device_get_ivars(child); uint32_t prescale, div; /* Don't depend on clock resolution limits from sdhci core. */ if (which == MMCBR_IVAR_CLOCK) { if (value == 0) { slot->host.ios.clock = 0; return (0); } sc = device_get_softc(bus); SDHCI_FSL_FDT_CLK_DIV(sc, sc->baseclk_hz, value, prescale, div); slot->host.ios.clock = sc->baseclk_hz / (prescale * div); return (0); } return (sdhci_generic_write_ivar(bus, child, which, value)); } static void sdhci_fsl_fdt_reset(device_t dev, struct sdhci_slot *slot, uint8_t mask) { struct sdhci_fsl_fdt_softc *sc; uint32_t val; sdhci_generic_reset(dev, slot, mask); if (!(mask & SDHCI_RESET_ALL)) return; sc = device_get_softc(dev); /* Some registers have to be cleared by hand. */ if (slot->version >= SDHCI_SPEC_300) { val = RD4(sc, SDHCI_FSL_TBCTL); val &= ~SDHCI_FSL_TBCTL_TBEN; WR4(sc, SDHCI_FSL_TBCTL, val); } /* * Pulse width detection is not reliable on some boards. Perform * workaround by clearing register's bit according to errata. */ if (sc->soc_data->errata & SDHCI_FSL_UNRELIABLE_PULSE_DET) { val = RD4(sc, SDHCI_FSL_DLLCFG1); val &= ~SDHCI_FSL_DLLCFG1_PULSE_STRETCH; WR4(sc, SDHCI_FSL_DLLCFG1, val); } sc->flags = 0; } static void sdhci_fsl_switch_tuning_block(device_t dev, bool enable) { struct sdhci_fsl_fdt_softc *sc; uint32_t reg; sc = device_get_softc(dev); reg = RD4(sc, SDHCI_FSL_TBCTL); if (enable) reg |= SDHCI_FSL_TBCTL_TBEN; else reg &= ~SDHCI_FSL_TBCTL_TBEN; WR4(sc, SDHCI_FSL_TBCTL, reg); } static int sdhci_fsl_sw_tuning(struct sdhci_fsl_fdt_softc *sc, device_t bus, device_t child, bool hs400, uint32_t wnd_start, uint32_t wnd_end) { uint32_t reg; int error; if (sc->soc_data->errata & SDHCI_FSL_TUNING_ERRATUM_TYPE1 || abs(wnd_start - wnd_end) <= (4 * sc->div_ratio + 2)) { wnd_start = 5 * sc->div_ratio; wnd_end = 3 * sc->div_ratio; } else { wnd_start = 8 * sc->div_ratio; wnd_end = 4 * sc->div_ratio; } reg = RD4(sc, SDHCI_FSL_TBPTR); reg &= ~SDHCI_FSL_TBPTR_WND_MASK; reg &= ~(SDHCI_FSL_TBPTR_WND_MASK << SDHCI_FSL_TBPTR_WND_START_SHIFT); reg |= wnd_start << SDHCI_FSL_TBPTR_WND_START_SHIFT; reg |= wnd_end; WR4(sc, SDHCI_FSL_TBPTR, reg); /* * Normally those are supposed to be set in sdhci_execute_tuning. * However in our case we need a small delay between setting the two. */ reg = RD4(sc, SDHCI_FSL_AUTOCERR); reg |= SDHCI_FSL_AUTOCERR_EXTN; WR4(sc, SDHCI_FSL_AUTOCERR, reg); DELAY(10); reg |= SDHCI_FSL_AUTOCERR_SMPCLKSEL; WR4(sc, SDHCI_FSL_AUTOCERR, reg); reg = RD4(sc, SDHCI_FSL_TBCTL); reg &= ~SDHCI_FSL_TBCTL_TB_MODE_MASK; reg |= SDHCI_FSL_TBCTL_MODE_SW; WR4(sc, SDHCI_FSL_TBCTL, reg); error = sdhci_generic_tune(bus, child, hs400); if (error != 0) { device_printf(bus, "Failed to execute generic tune while performing software tuning.\n"); } return (error); } static int sdhci_fsl_fdt_tune(device_t bus, device_t child, bool hs400) { struct sdhci_fsl_fdt_softc *sc; uint32_t wnd_start, wnd_end; uint32_t clk_divider, reg; struct sdhci_slot *slot; int error; sc = device_get_softc(bus); slot = device_get_ivars(child); if (sc->slot.host.ios.timing == bus_timing_uhs_sdr50 && !(slot->opt & SDHCI_SDR50_NEEDS_TUNING)) return (0); /* * For tuning mode SD clock divider must be within 3 to 16. * We also need to match the frequency to whatever mode is used. * For that reason we're just bailing if the dividers don't match * that requirement. */ clk_divider = sc->baseclk_hz / slot->clock; if (clk_divider < 3 || clk_divider > 16) return (ENXIO); if (hs400) sc->flags |= SDHCI_FSL_HS400_FLAG; /* Disable clock. */ fsl_sdhc_fdt_set_clock(sc, slot, sc->sdclk_bits); /* Wait for PRSSTAT[SDSTB] to be set by hardware. */ error = sdhci_fsl_poll_register(sc, SDHCI_FSL_PRES_STATE, SDHCI_FSL_PRES_SDSTB, SDHCI_FSL_PRES_SDSTB); if (error != 0) device_printf(bus, "Timeout while waiting for clock to stabilize.\n"); /* Flush async IO. */ reg = RD4(sc, SDHCI_FSL_ESDHC_CTRL); reg |= SDHCI_FSL_ESDHC_CTRL_FAF; WR4(sc, SDHCI_FSL_ESDHC_CTRL, reg); /* Wait for ESDHC[FAF] to be cleared by hardware. */ error = sdhci_fsl_poll_register(sc, SDHCI_FSL_ESDHC_CTRL, SDHCI_FSL_ESDHC_CTRL_FAF, 0); if (error) device_printf(bus, "Timeout while waiting for hardware.\n"); /* * Set TBCTL[TB_EN] register and program valid tuning mode. * According to RM MODE_3 means that: * "eSDHC takes care of the re-tuning during data transfer * (auto re-tuning).". * Tuning mode can only be changed while the clock is disabled. */ reg = RD4(sc, SDHCI_FSL_TBCTL); reg &= ~SDHCI_FSL_TBCTL_TB_MODE_MASK; reg |= SDHCI_FSL_TBCTL_TBEN | SDHCI_FSL_TBCTL_MODE_3; WR4(sc, SDHCI_FSL_TBCTL, reg); /* Enable clock. */ fsl_sdhc_fdt_set_clock(sc, slot, SDHCI_CLOCK_CARD_EN | sc->sdclk_bits); /* Wait for clock to stabilize. */ error = sdhci_fsl_poll_register(sc, SDHCI_FSL_PRES_STATE, SDHCI_FSL_PRES_SDSTB, SDHCI_FSL_PRES_SDSTB); if (error) device_printf(bus, "Timeout while waiting for clock to stabilize.\n"); /* Perform hardware tuning. */ error = sdhci_generic_tune(bus, child, hs400); reg = RD4(sc, SDHCI_FSL_TBPTR); wnd_start = reg >> SDHCI_FSL_TBPTR_WND_START_SHIFT; wnd_start &= SDHCI_FSL_TBPTR_WND_MASK; wnd_end = reg & SDHCI_FSL_TBPTR_WND_MASK; /* * For erratum type2 affected platforms, the controller can erroneously * declare that the tuning was successful. Verify the tuning window to * make sure that we're fine. */ if (error == 0 && sc->soc_data->errata & SDHCI_FSL_TUNING_ERRATUM_TYPE2 && abs(wnd_start - wnd_end) > (4 * sc->div_ratio + 2)) { error = EIO; } /* If hardware tuning failed, try software tuning. */ if (error != 0 && (sc->soc_data->errata & (SDHCI_FSL_TUNING_ERRATUM_TYPE1 | SDHCI_FSL_TUNING_ERRATUM_TYPE2))) { error = sdhci_fsl_sw_tuning(sc, bus, child, hs400, wnd_start, wnd_end); if (error != 0) device_printf(bus, "Software tuning failed.\n"); } if (error != 0) { sdhci_fsl_switch_tuning_block(bus, false); return (error); } if (hs400) { reg = RD4(sc, SDHCI_FSL_SDTIMINGCTL); reg |= SDHCI_FSL_SDTIMINGCTL_FLW_CTL; WR4(sc, SDHCI_FSL_SDTIMINGCTL, reg); } return (0); } static int sdhci_fsl_fdt_retune(device_t bus, device_t child, bool reset) { struct sdhci_slot *slot; struct sdhci_fsl_fdt_softc *sc; slot = device_get_ivars(child); sc = device_get_softc(bus); if (!(slot->opt & SDHCI_TUNING_ENABLED)) return (0); /* HS400 must be tuned in HS200 mode. */ if (slot->host.ios.timing == bus_timing_mmc_hs400) return (EINVAL); /* * Only re-tuning with full reset is supported. * The controller is normally put in "mode 3", which means that * periodic re-tuning is done automatically. See comment in * sdhci_fsl_fdt_tune for details. * Because of that re-tuning should only be triggered as a result * of a CRC error. */ if (!reset) return (ENOTSUP); return (sdhci_fsl_fdt_tune(bus, child, sc->flags & SDHCI_FSL_HS400_FLAG)); } static void sdhci_fsl_disable_hs400_mode(device_t dev, struct sdhci_fsl_fdt_softc *sc) { uint32_t reg; int error; /* Check if HS400 is enabled right now. */ reg = RD4(sc, SDHCI_FSL_TBCTL); if ((reg & SDHCI_FSL_TBCTL_HS400_EN) == 0) return; reg = RD4(sc, SDHCI_FSL_SDTIMINGCTL); reg &= ~SDHCI_FSL_SDTIMINGCTL_FLW_CTL; WR4(sc, SDHCI_FSL_SDTIMINGCTL, reg); reg = RD4(sc, SDHCI_FSL_SDCLKCTL); reg &= ~SDHCI_FSL_SDCLKCTL_CMD_CLK_CTL; WR4(sc, SDHCI_FSL_SDCLKCTL, reg); fsl_sdhc_fdt_set_clock(sc, &sc->slot, sc->sdclk_bits); error = sdhci_fsl_poll_register(sc, SDHCI_FSL_PRES_STATE, SDHCI_FSL_PRES_SDSTB, SDHCI_FSL_PRES_SDSTB); if (error != 0) device_printf(dev, "Internal clock never stabilized.\n"); reg = RD4(sc, SDHCI_FSL_TBCTL); reg &= ~SDHCI_FSL_TBCTL_HS400_EN; WR4(sc, SDHCI_FSL_TBCTL, reg); fsl_sdhc_fdt_set_clock(sc, &sc->slot, SDHCI_CLOCK_CARD_EN | sc->sdclk_bits); error = sdhci_fsl_poll_register(sc, SDHCI_FSL_PRES_STATE, SDHCI_FSL_PRES_SDSTB, SDHCI_FSL_PRES_SDSTB); if (error != 0) device_printf(dev, "Internal clock never stabilized.\n"); reg = RD4(sc, SDHCI_FSL_DLLCFG0); reg &= ~(SDHCI_FSL_DLLCFG0_EN | SDHCI_FSL_DLLCFG0_FREQ_SEL); WR4(sc, SDHCI_FSL_DLLCFG0, reg); reg = RD4(sc, SDHCI_FSL_TBCTL); reg &= ~SDHCI_FSL_TBCTL_HS400_WND_ADJ; WR4(sc, SDHCI_FSL_TBCTL, reg); sdhci_fsl_switch_tuning_block(dev, false); } static void sdhci_fsl_enable_hs400_mode(device_t dev, struct sdhci_slot *slot, struct sdhci_fsl_fdt_softc *sc) { uint32_t reg; int error; sdhci_fsl_switch_tuning_block(dev, true); fsl_sdhc_fdt_set_clock(sc, slot, sc->sdclk_bits); error = sdhci_fsl_poll_register(sc, SDHCI_FSL_PRES_STATE, SDHCI_FSL_PRES_SDSTB, SDHCI_FSL_PRES_SDSTB); if (error != 0) device_printf(dev, "Timeout while waiting for clock to stabilize.\n"); reg = RD4(sc, SDHCI_FSL_TBCTL); reg |= SDHCI_FSL_TBCTL_HS400_EN; WR4(sc, SDHCI_FSL_TBCTL, reg); reg = RD4(sc, SDHCI_FSL_SDCLKCTL); reg |= SDHCI_FSL_SDCLKCTL_CMD_CLK_CTL; WR4(sc, SDHCI_FSL_SDCLKCTL, reg); fsl_sdhc_fdt_set_clock(sc, slot, SDHCI_CLOCK_CARD_EN | sc->sdclk_bits); error = sdhci_fsl_poll_register(sc, SDHCI_FSL_PRES_STATE, SDHCI_FSL_PRES_SDSTB, SDHCI_FSL_PRES_SDSTB); if (error != 0) device_printf(dev, "Timeout while waiting for clock to stabilize.\n"); reg = RD4(sc, SDHCI_FSL_DLLCFG0); reg |= SDHCI_FSL_DLLCFG0_EN | SDHCI_FSL_DLLCFG0_RESET | SDHCI_FSL_DLLCFG0_FREQ_SEL; WR4(sc, SDHCI_FSL_DLLCFG0, reg); /* * The reset bit is not a self clearing one. * Give it some time and clear it manually. */ DELAY(100); reg &= ~SDHCI_FSL_DLLCFG0_RESET; WR4(sc, SDHCI_FSL_DLLCFG0, reg); error = sdhci_fsl_poll_register(sc, SDHCI_FSL_DLLSTAT0, SDHCI_FSL_DLLSTAT0_SLV_STS, SDHCI_FSL_DLLSTAT0_SLV_STS); if (error != 0) device_printf(dev, "Timeout while waiting for DLL0.\n"); reg = RD4(sc, SDHCI_FSL_TBCTL); reg |= SDHCI_FSL_TBCTL_HS400_WND_ADJ; WR4(sc, SDHCI_FSL_TBCTL, reg); fsl_sdhc_fdt_set_clock(sc, slot, sc->sdclk_bits); error = sdhci_fsl_poll_register(sc, SDHCI_FSL_PRES_STATE, SDHCI_FSL_PRES_SDSTB, SDHCI_FSL_PRES_SDSTB); if (error != 0) device_printf(dev, "timeout while waiting for clock to stabilize.\n"); reg = RD4(sc, SDHCI_FSL_ESDHC_CTRL); reg |= SDHCI_FSL_ESDHC_CTRL_FAF; WR4(sc, SDHCI_FSL_ESDHC_CTRL, reg); error = sdhci_fsl_poll_register(sc, SDHCI_FSL_ESDHC_CTRL, SDHCI_FSL_ESDHC_CTRL_FAF, 0); if (error != 0) device_printf(dev, "Timeout while waiting for hardware.\n"); fsl_sdhc_fdt_set_clock(sc, slot, SDHCI_CLOCK_CARD_EN | sc->sdclk_bits); error = sdhci_fsl_poll_register(sc, SDHCI_FSL_PRES_STATE, SDHCI_FSL_PRES_SDSTB, SDHCI_FSL_PRES_SDSTB); if (error != 0) device_printf(dev, "Timeout while waiting for clock to stabilize.\n"); } static void sdhci_fsl_fdt_set_uhs_timing(device_t dev, struct sdhci_slot *slot) { struct sdhci_fsl_fdt_softc *sc; const struct mmc_ios *ios; uint32_t mode, reg; sc = device_get_softc(dev); ios = &slot->host.ios; mode = 0; /* * When we switch to HS400 this function is called twice. * First after the timing is set, and then after the clock * is changed to the target frequency. * The controller can be switched to HS400 only after the latter * is done. */ if (slot->host.ios.timing == bus_timing_mmc_hs400 && ios->clock > SD_SDR50_MAX) sdhci_fsl_enable_hs400_mode(dev, slot, sc); else if (slot->host.ios.timing < bus_timing_mmc_hs400) { sdhci_fsl_disable_hs400_mode(dev, sc); /* * Switching to HS400 requires a custom procedure executed in * sdhci_fsl_enable_hs400_mode in case above. * For all other modes we just need to set the corresponding flag. */ reg = RD4(sc, SDHCI_FSL_AUTOCERR); reg &= ~SDHCI_FSL_AUTOCERR_UHMS; if (ios->clock > SD_SDR50_MAX) mode = SDHCI_CTRL2_UHS_SDR104; else if (ios->clock > SD_SDR25_MAX) mode = SDHCI_CTRL2_UHS_SDR50; else if (ios->clock > SD_SDR12_MAX) { if (ios->timing == bus_timing_uhs_ddr50 || ios->timing == bus_timing_mmc_ddr52) mode = SDHCI_CTRL2_UHS_DDR50; else mode = SDHCI_CTRL2_UHS_SDR25; } else if (ios->clock > SD_MMC_CARD_ID_FREQUENCY) mode = SDHCI_CTRL2_UHS_SDR12; reg |= mode << SDHCI_FSL_AUTOCERR_UHMS_SHIFT; WR4(sc, SDHCI_FSL_AUTOCERR, reg); } } static const device_method_t sdhci_fsl_fdt_methods[] = { /* Device interface. */ DEVMETHOD(device_probe, sdhci_fsl_fdt_probe), DEVMETHOD(device_attach, sdhci_fsl_fdt_attach), DEVMETHOD(device_detach, sdhci_fsl_fdt_detach), /* Bus interface. */ DEVMETHOD(bus_read_ivar, sdhci_fsl_fdt_read_ivar), DEVMETHOD(bus_write_ivar, sdhci_fsl_fdt_write_ivar), /* MMC bridge interface. */ DEVMETHOD(mmcbr_request, sdhci_generic_request), DEVMETHOD(mmcbr_get_ro, sdhci_fsl_fdt_get_ro), DEVMETHOD(mmcbr_acquire_host, sdhci_generic_acquire_host), DEVMETHOD(mmcbr_release_host, sdhci_generic_release_host), DEVMETHOD(mmcbr_switch_vccq, sdhci_fsl_fdt_switch_vccq), DEVMETHOD(mmcbr_update_ios, sdhci_fsl_fdt_update_ios), DEVMETHOD(mmcbr_tune, sdhci_fsl_fdt_tune), DEVMETHOD(mmcbr_retune, sdhci_fsl_fdt_retune), /* SDHCI accessors. */ DEVMETHOD(sdhci_read_1, sdhci_fsl_fdt_read_1), DEVMETHOD(sdhci_read_2, sdhci_fsl_fdt_read_2), DEVMETHOD(sdhci_read_4, sdhci_fsl_fdt_read_4), DEVMETHOD(sdhci_read_multi_4, sdhci_fsl_fdt_read_multi_4), DEVMETHOD(sdhci_write_1, sdhci_fsl_fdt_write_1), DEVMETHOD(sdhci_write_2, sdhci_fsl_fdt_write_2), DEVMETHOD(sdhci_write_4, sdhci_fsl_fdt_write_4), DEVMETHOD(sdhci_write_multi_4, sdhci_fsl_fdt_write_multi_4), DEVMETHOD(sdhci_get_card_present, sdhci_fsl_fdt_get_card_present), DEVMETHOD(sdhci_reset, sdhci_fsl_fdt_reset), DEVMETHOD(sdhci_set_uhs_timing, sdhci_fsl_fdt_set_uhs_timing), DEVMETHOD_END }; static driver_t sdhci_fsl_fdt_driver = { "sdhci_fsl_fdt", sdhci_fsl_fdt_methods, sizeof(struct sdhci_fsl_fdt_softc), }; DRIVER_MODULE(sdhci_fsl_fdt, simplebus, sdhci_fsl_fdt_driver, NULL, NULL); SDHCI_DEPEND(sdhci_fsl_fdt); #ifndef MMCCAM MMC_DECLARE_BRIDGE(sdhci_fsl_fdt); #endif