725 lines
21 KiB
C
725 lines
21 KiB
C
/*-
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* Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
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* Copyright (c) 2011 Ben Gray <ben.r.gray@gmail.com>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/gpio.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <sys/taskqueue.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <machine/intr.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/mmc/bridge.h>
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#include <dev/mmc/mmcreg.h>
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#include <dev/mmc/mmcbrvar.h>
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#include <dev/sdhci/sdhci.h>
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#include "sdhci_if.h"
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#include <arm/ti/ti_cpuid.h>
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#include <arm/ti/ti_prcm.h>
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#include <arm/ti/ti_hwmods.h>
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#include "gpio_if.h"
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struct ti_sdhci_softc {
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device_t dev;
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device_t gpio_dev;
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struct resource * mem_res;
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struct resource * irq_res;
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void * intr_cookie;
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struct sdhci_slot slot;
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clk_ident_t mmchs_clk_id;
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uint32_t mmchs_reg_off;
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uint32_t sdhci_reg_off;
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uint32_t baseclk_hz;
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uint32_t wp_gpio_pin;
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uint32_t cmd_and_mode;
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uint32_t sdhci_clkdiv;
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boolean_t disable_highspeed;
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boolean_t force_card_present;
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};
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/*
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* Table of supported FDT compat strings.
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*
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* Note that "ti,mmchs" is our own invention, and should be phased out in favor
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* of the documented names.
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*
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* Note that vendor Beaglebone dtsi files use "ti,omap3-hsmmc" for the am335x.
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*/
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static struct ofw_compat_data compat_data[] = {
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{"ti,omap3-hsmmc", 1},
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{"ti,omap4-hsmmc", 1},
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{"ti,mmchs", 1},
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{NULL, 0},
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};
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/*
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* The MMCHS hardware has a few control and status registers at the beginning of
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* the device's memory map, followed by the standard sdhci register block.
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* Different SoCs have the register blocks at different offsets from the
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* beginning of the device. Define some constants to map out the registers we
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* access, and the various per-SoC offsets. The SDHCI_REG_OFFSET is how far
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* beyond the MMCHS block the SDHCI block is found; it's the same on all SoCs.
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*/
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#define OMAP3_MMCHS_REG_OFFSET 0x000
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#define OMAP4_MMCHS_REG_OFFSET 0x100
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#define AM335X_MMCHS_REG_OFFSET 0x100
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#define SDHCI_REG_OFFSET 0x100
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#define MMCHS_SYSCONFIG 0x010
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#define MMCHS_SYSCONFIG_RESET (1 << 1)
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#define MMCHS_SYSSTATUS 0x014
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#define MMCHS_SYSSTATUS_RESETDONE (1 << 0)
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#define MMCHS_CON 0x02C
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#define MMCHS_CON_DW8 (1 << 5)
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#define MMCHS_CON_DVAL_8_4MS (3 << 9)
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#define MMCHS_CON_OD (1 << 0)
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#define MMCHS_SYSCTL 0x12C
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#define MMCHS_SYSCTL_CLKD_MASK 0x3FF
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#define MMCHS_SYSCTL_CLKD_SHIFT 6
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#define MMCHS_SD_CAPA 0x140
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#define MMCHS_SD_CAPA_VS18 (1 << 26)
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#define MMCHS_SD_CAPA_VS30 (1 << 25)
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#define MMCHS_SD_CAPA_VS33 (1 << 24)
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static inline uint32_t
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ti_mmchs_read_4(struct ti_sdhci_softc *sc, bus_size_t off)
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{
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return (bus_read_4(sc->mem_res, off + sc->mmchs_reg_off));
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}
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static inline void
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ti_mmchs_write_4(struct ti_sdhci_softc *sc, bus_size_t off, uint32_t val)
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{
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bus_write_4(sc->mem_res, off + sc->mmchs_reg_off, val);
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}
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static inline uint32_t
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RD4(struct ti_sdhci_softc *sc, bus_size_t off)
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{
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return (bus_read_4(sc->mem_res, off + sc->sdhci_reg_off));
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}
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static inline void
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WR4(struct ti_sdhci_softc *sc, bus_size_t off, uint32_t val)
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{
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bus_write_4(sc->mem_res, off + sc->sdhci_reg_off, val);
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}
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static uint8_t
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ti_sdhci_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off)
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{
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struct ti_sdhci_softc *sc = device_get_softc(dev);
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return ((RD4(sc, off & ~3) >> (off & 3) * 8) & 0xff);
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}
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static uint16_t
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ti_sdhci_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off)
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{
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struct ti_sdhci_softc *sc = device_get_softc(dev);
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uint32_t clkdiv, val32;
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/*
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* The MMCHS hardware has a non-standard interpretation of the sdclock
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* divisor bits. It uses the same bit positions as SDHCI 3.0 (15..6)
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* but doesn't split them into low:high fields. Instead they're a
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* single number in the range 0..1023 and the number is exactly the
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* clock divisor (with 0 and 1 both meaning divide by 1). The SDHCI
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* driver code expects a v2.0 or v3.0 divisor. The shifting and masking
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* here extracts the MMCHS representation from the hardware word, cleans
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* those bits out, applies the 2N adjustment, and plugs the result into
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* the bit positions for the 2.0 or 3.0 divisor in the returned register
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* value. The ti_sdhci_write_2() routine performs the opposite
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* transformation when the SDHCI driver writes to the register.
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*/
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if (off == SDHCI_CLOCK_CONTROL) {
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val32 = RD4(sc, SDHCI_CLOCK_CONTROL);
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clkdiv = ((val32 >> MMCHS_SYSCTL_CLKD_SHIFT) &
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MMCHS_SYSCTL_CLKD_MASK) / 2;
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val32 &= ~(MMCHS_SYSCTL_CLKD_MASK << MMCHS_SYSCTL_CLKD_SHIFT);
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val32 |= (clkdiv & SDHCI_DIVIDER_MASK) << SDHCI_DIVIDER_SHIFT;
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if (slot->version >= SDHCI_SPEC_300)
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val32 |= ((clkdiv >> SDHCI_DIVIDER_MASK_LEN) &
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SDHCI_DIVIDER_HI_MASK) << SDHCI_DIVIDER_HI_SHIFT;
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return (val32 & 0xffff);
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}
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/*
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* Standard 32-bit handling of command and transfer mode.
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*/
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if (off == SDHCI_TRANSFER_MODE) {
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return (sc->cmd_and_mode >> 16);
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} else if (off == SDHCI_COMMAND_FLAGS) {
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return (sc->cmd_and_mode & 0x0000ffff);
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}
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return ((RD4(sc, off & ~3) >> (off & 3) * 8) & 0xffff);
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}
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static uint32_t
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ti_sdhci_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off)
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{
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struct ti_sdhci_softc *sc = device_get_softc(dev);
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uint32_t val32;
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val32 = RD4(sc, off);
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/*
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* If we need to disallow highspeed mode due to the OMAP4 erratum, strip
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* that flag from the returned capabilities.
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*/
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if (off == SDHCI_CAPABILITIES && sc->disable_highspeed)
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val32 &= ~SDHCI_CAN_DO_HISPD;
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/*
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* Force the card-present state if necessary.
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*/
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if (off == SDHCI_PRESENT_STATE && sc->force_card_present)
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val32 |= SDHCI_CARD_PRESENT;
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return (val32);
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}
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static void
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ti_sdhci_read_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
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uint32_t *data, bus_size_t count)
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{
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struct ti_sdhci_softc *sc = device_get_softc(dev);
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bus_read_multi_4(sc->mem_res, off + sc->sdhci_reg_off, data, count);
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}
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static void
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ti_sdhci_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off,
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uint8_t val)
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{
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struct ti_sdhci_softc *sc = device_get_softc(dev);
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uint32_t val32;
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val32 = RD4(sc, off & ~3);
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val32 &= ~(0xff << (off & 3) * 8);
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val32 |= (val << (off & 3) * 8);
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WR4(sc, off & ~3, val32);
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}
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static void
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ti_sdhci_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off,
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uint16_t val)
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{
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struct ti_sdhci_softc *sc = device_get_softc(dev);
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uint32_t clkdiv, val32;
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/*
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* Translate between the hardware and SDHCI 2.0 or 3.0 representations
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* of the clock divisor. See the comments in ti_sdhci_read_2() for
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* details.
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*/
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if (off == SDHCI_CLOCK_CONTROL) {
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clkdiv = (val >> SDHCI_DIVIDER_SHIFT) & SDHCI_DIVIDER_MASK;
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if (slot->version >= SDHCI_SPEC_300)
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clkdiv |= ((val >> SDHCI_DIVIDER_HI_SHIFT) &
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SDHCI_DIVIDER_HI_MASK) << SDHCI_DIVIDER_MASK_LEN;
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clkdiv *= 2;
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if (clkdiv > MMCHS_SYSCTL_CLKD_MASK)
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clkdiv = MMCHS_SYSCTL_CLKD_MASK;
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val32 = RD4(sc, SDHCI_CLOCK_CONTROL);
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val32 &= 0xffff0000;
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val32 |= val & ~(MMCHS_SYSCTL_CLKD_MASK <<
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MMCHS_SYSCTL_CLKD_SHIFT);
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val32 |= clkdiv << MMCHS_SYSCTL_CLKD_SHIFT;
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WR4(sc, SDHCI_CLOCK_CONTROL, val32);
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return;
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}
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/*
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* Standard 32-bit handling of command and transfer mode.
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*/
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if (off == SDHCI_TRANSFER_MODE) {
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sc->cmd_and_mode = (sc->cmd_and_mode & 0xffff0000) |
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((uint32_t)val & 0x0000ffff);
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return;
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} else if (off == SDHCI_COMMAND_FLAGS) {
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sc->cmd_and_mode = (sc->cmd_and_mode & 0x0000ffff) |
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((uint32_t)val << 16);
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WR4(sc, SDHCI_TRANSFER_MODE, sc->cmd_and_mode);
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return;
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}
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val32 = RD4(sc, off & ~3);
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val32 &= ~(0xffff << (off & 3) * 8);
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val32 |= ((val & 0xffff) << (off & 3) * 8);
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WR4(sc, off & ~3, val32);
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}
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static void
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ti_sdhci_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
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uint32_t val)
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{
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struct ti_sdhci_softc *sc = device_get_softc(dev);
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WR4(sc, off, val);
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}
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static void
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ti_sdhci_write_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
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uint32_t *data, bus_size_t count)
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{
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struct ti_sdhci_softc *sc = device_get_softc(dev);
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bus_write_multi_4(sc->mem_res, off + sc->sdhci_reg_off, data, count);
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}
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static void
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ti_sdhci_intr(void *arg)
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{
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struct ti_sdhci_softc *sc = arg;
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sdhci_generic_intr(&sc->slot);
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}
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static int
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ti_sdhci_update_ios(device_t brdev, device_t reqdev)
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{
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struct ti_sdhci_softc *sc = device_get_softc(brdev);
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struct sdhci_slot *slot;
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struct mmc_ios *ios;
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uint32_t val32, newval32;
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slot = device_get_ivars(reqdev);
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ios = &slot->host.ios;
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/*
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* There is an 8-bit-bus bit in the MMCHS control register which, when
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* set, overrides the 1 vs 4 bit setting in the standard SDHCI
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* registers. Set that bit first according to whether an 8-bit bus is
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* requested, then let the standard driver handle everything else.
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*/
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val32 = ti_mmchs_read_4(sc, MMCHS_CON);
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newval32 = val32;
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if (ios->bus_width == bus_width_8)
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newval32 |= MMCHS_CON_DW8;
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else
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newval32 &= ~MMCHS_CON_DW8;
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if (ios->bus_mode == opendrain)
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newval32 |= MMCHS_CON_OD;
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else /* if (ios->bus_mode == pushpull) */
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newval32 &= ~MMCHS_CON_OD;
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if (newval32 != val32)
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ti_mmchs_write_4(sc, MMCHS_CON, newval32);
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return (sdhci_generic_update_ios(brdev, reqdev));
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}
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static int
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ti_sdhci_get_ro(device_t brdev, device_t reqdev)
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{
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struct ti_sdhci_softc *sc = device_get_softc(brdev);
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unsigned int readonly = 0;
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/* If a gpio pin is configured, read it. */
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if (sc->gpio_dev != NULL) {
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GPIO_PIN_GET(sc->gpio_dev, sc->wp_gpio_pin, &readonly);
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}
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return (readonly);
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}
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static int
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ti_sdhci_detach(device_t dev)
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{
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return (EBUSY);
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}
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static void
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ti_sdhci_hw_init(device_t dev)
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{
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struct ti_sdhci_softc *sc = device_get_softc(dev);
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uint32_t regval;
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unsigned long timeout;
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/* Enable the controller and interface/functional clocks */
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if (ti_prcm_clk_enable(sc->mmchs_clk_id) != 0) {
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device_printf(dev, "Error: failed to enable MMC clock\n");
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return;
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}
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/* Get the frequency of the source clock */
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if (ti_prcm_clk_get_source_freq(sc->mmchs_clk_id,
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&sc->baseclk_hz) != 0) {
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device_printf(dev, "Error: failed to get source clock freq\n");
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return;
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}
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/* Issue a softreset to the controller */
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ti_mmchs_write_4(sc, MMCHS_SYSCONFIG, MMCHS_SYSCONFIG_RESET);
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timeout = 1000;
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while (!(ti_mmchs_read_4(sc, MMCHS_SYSSTATUS) &
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MMCHS_SYSSTATUS_RESETDONE)) {
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if (--timeout == 0) {
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device_printf(dev,
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"Error: Controller reset operation timed out\n");
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break;
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}
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DELAY(100);
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}
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/*
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* Reset the command and data state machines and also other aspects of
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* the controller such as bus clock and power.
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*
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* If we read the software reset register too fast after writing it we
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* can get back a zero that means the reset hasn't started yet rather
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* than that the reset is complete. Per TI recommendations, work around
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* it by reading until we see the reset bit asserted, then read until
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* it's clear. We also set the SDHCI_QUIRK_WAITFOR_RESET_ASSERTED quirk
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* so that the main sdhci driver uses this same logic in its resets.
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*/
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ti_sdhci_write_1(dev, NULL, SDHCI_SOFTWARE_RESET, SDHCI_RESET_ALL);
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timeout = 10000;
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while ((ti_sdhci_read_1(dev, NULL, SDHCI_SOFTWARE_RESET) &
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SDHCI_RESET_ALL) != SDHCI_RESET_ALL) {
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if (--timeout == 0) {
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break;
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}
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DELAY(1);
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}
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timeout = 10000;
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while ((ti_sdhci_read_1(dev, NULL, SDHCI_SOFTWARE_RESET) &
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SDHCI_RESET_ALL)) {
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if (--timeout == 0) {
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device_printf(dev,
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"Error: Software reset operation timed out\n");
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break;
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}
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DELAY(100);
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}
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/*
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* The attach() routine has examined fdt data and set flags in
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* slot.host.caps to reflect what voltages we can handle. Set those
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* values in the CAPA register. The manual says that these values can
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* only be set once, "before initialization" whatever that means, and
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* that they survive a reset. So maybe doing this will be a no-op if
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* u-boot has already initialized the hardware.
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*/
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regval = ti_mmchs_read_4(sc, MMCHS_SD_CAPA);
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if (sc->slot.host.caps & MMC_OCR_LOW_VOLTAGE)
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regval |= MMCHS_SD_CAPA_VS18;
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if (sc->slot.host.caps & (MMC_OCR_290_300 | MMC_OCR_300_310))
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regval |= MMCHS_SD_CAPA_VS30;
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ti_mmchs_write_4(sc, MMCHS_SD_CAPA, regval);
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/* Set initial host configuration (1-bit, std speed, pwr off). */
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ti_sdhci_write_1(dev, NULL, SDHCI_HOST_CONTROL, 0);
|
|
ti_sdhci_write_1(dev, NULL, SDHCI_POWER_CONTROL, 0);
|
|
|
|
/* Set the initial controller configuration. */
|
|
ti_mmchs_write_4(sc, MMCHS_CON, MMCHS_CON_DVAL_8_4MS);
|
|
}
|
|
|
|
static int
|
|
ti_sdhci_attach(device_t dev)
|
|
{
|
|
struct ti_sdhci_softc *sc = device_get_softc(dev);
|
|
int rid, err;
|
|
pcell_t prop;
|
|
phandle_t node;
|
|
|
|
sc->dev = dev;
|
|
|
|
/*
|
|
* Get the MMCHS device id from FDT. If it's not there use the newbus
|
|
* unit number (which will work as long as the devices are in order and
|
|
* none are skipped in the fdt). Note that this is a property we made
|
|
* up and added in freebsd, it doesn't exist in the published bindings.
|
|
*/
|
|
node = ofw_bus_get_node(dev);
|
|
sc->mmchs_clk_id = ti_hwmods_get_clock(dev);
|
|
if (sc->mmchs_clk_id == INVALID_CLK_IDENT) {
|
|
device_printf(dev, "failed to get clock based on hwmods property\n");
|
|
}
|
|
|
|
/*
|
|
* The hardware can inherently do dual-voltage (1p8v, 3p0v) on the first
|
|
* device, and only 1p8v on other devices unless an external transceiver
|
|
* is used. The only way we could know about a transceiver is fdt data.
|
|
* Note that we have to do this before calling ti_sdhci_hw_init() so
|
|
* that it can set the right values in the CAPA register, which can only
|
|
* be done once and never reset.
|
|
*/
|
|
sc->slot.host.caps |= MMC_OCR_LOW_VOLTAGE;
|
|
if (sc->mmchs_clk_id == MMC1_CLK || OF_hasprop(node, "ti,dual-volt")) {
|
|
sc->slot.host.caps |= MMC_OCR_290_300 | MMC_OCR_300_310;
|
|
}
|
|
|
|
/*
|
|
* See if we've got a GPIO-based write detect pin. This is not the
|
|
* standard documented property for this, we added it in freebsd.
|
|
*/
|
|
if ((OF_getencprop(node, "mmchs-wp-gpio-pin", &prop, sizeof(prop))) <= 0)
|
|
sc->wp_gpio_pin = 0xffffffff;
|
|
else
|
|
sc->wp_gpio_pin = prop;
|
|
|
|
if (sc->wp_gpio_pin != 0xffffffff) {
|
|
sc->gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
|
|
if (sc->gpio_dev == NULL)
|
|
device_printf(dev, "Error: No GPIO device, "
|
|
"Write Protect pin will not function\n");
|
|
else
|
|
GPIO_PIN_SETFLAGS(sc->gpio_dev, sc->wp_gpio_pin,
|
|
GPIO_PIN_INPUT);
|
|
}
|
|
|
|
/*
|
|
* Set the offset from the device's memory start to the MMCHS registers.
|
|
* Also for OMAP4 disable high speed mode due to erratum ID i626.
|
|
*/
|
|
switch (ti_chip()) {
|
|
#ifdef SOC_OMAP4
|
|
case CHIP_OMAP_4:
|
|
sc->mmchs_reg_off = OMAP4_MMCHS_REG_OFFSET;
|
|
sc->disable_highspeed = true;
|
|
break;
|
|
#endif
|
|
#ifdef SOC_TI_AM335X
|
|
case CHIP_AM335X:
|
|
sc->mmchs_reg_off = AM335X_MMCHS_REG_OFFSET;
|
|
break;
|
|
#endif
|
|
default:
|
|
panic("Unknown OMAP device\n");
|
|
}
|
|
|
|
/*
|
|
* The standard SDHCI registers are at a fixed offset (the same on all
|
|
* SoCs) beyond the MMCHS registers.
|
|
*/
|
|
sc->sdhci_reg_off = sc->mmchs_reg_off + SDHCI_REG_OFFSET;
|
|
|
|
/* Resource setup. */
|
|
rid = 0;
|
|
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
|
|
RF_ACTIVE);
|
|
if (!sc->mem_res) {
|
|
device_printf(dev, "cannot allocate memory window\n");
|
|
err = ENXIO;
|
|
goto fail;
|
|
}
|
|
|
|
rid = 0;
|
|
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
|
|
RF_ACTIVE);
|
|
if (!sc->irq_res) {
|
|
device_printf(dev, "cannot allocate interrupt\n");
|
|
err = ENXIO;
|
|
goto fail;
|
|
}
|
|
|
|
if (bus_setup_intr(dev, sc->irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
|
|
NULL, ti_sdhci_intr, sc, &sc->intr_cookie)) {
|
|
device_printf(dev, "cannot setup interrupt handler\n");
|
|
err = ENXIO;
|
|
goto fail;
|
|
}
|
|
|
|
/* Initialise the MMCHS hardware. */
|
|
ti_sdhci_hw_init(dev);
|
|
|
|
/*
|
|
* The capabilities register can only express base clock frequencies in
|
|
* the range of 0-63MHz for a v2.0 controller. Since our clock runs
|
|
* faster than that, the hardware sets the frequency to zero in the
|
|
* register. When the register contains zero, the sdhci driver expects
|
|
* slot.max_clk to already have the right value in it.
|
|
*/
|
|
sc->slot.max_clk = sc->baseclk_hz;
|
|
|
|
/*
|
|
* The MMCHS timeout counter is based on the output sdclock. Tell the
|
|
* sdhci driver to recalculate the timeout clock whenever the output
|
|
* sdclock frequency changes.
|
|
*/
|
|
sc->slot.quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
|
|
|
|
/*
|
|
* The MMCHS hardware shifts the 136-bit response data (in violation of
|
|
* the spec), so tell the sdhci driver not to do the same in software.
|
|
*/
|
|
sc->slot.quirks |= SDHCI_QUIRK_DONT_SHIFT_RESPONSE;
|
|
|
|
/*
|
|
* Reset bits are broken, have to wait to see the bits asserted
|
|
* before waiting to see them de-asserted.
|
|
*/
|
|
sc->slot.quirks |= SDHCI_QUIRK_WAITFOR_RESET_ASSERTED;
|
|
|
|
/*
|
|
* DMA is not really broken, I just haven't implemented it yet.
|
|
*/
|
|
sc->slot.quirks |= SDHCI_QUIRK_BROKEN_DMA;
|
|
|
|
/*
|
|
* Set up the hardware and go. Note that this sets many of the
|
|
* slot.host.* fields, so we have to do this before overriding any of
|
|
* those values based on fdt data, below.
|
|
*/
|
|
sdhci_init_slot(dev, &sc->slot, 0);
|
|
|
|
/*
|
|
* The SDHCI controller doesn't realize it, but we can support 8-bit
|
|
* even though we're not a v3.0 controller. If there's an fdt bus-width
|
|
* property, honor it.
|
|
*/
|
|
if (OF_getencprop(node, "bus-width", &prop, sizeof(prop)) > 0) {
|
|
sc->slot.host.caps &= ~(MMC_CAP_4_BIT_DATA |
|
|
MMC_CAP_8_BIT_DATA);
|
|
switch (prop) {
|
|
case 8:
|
|
sc->slot.host.caps |= MMC_CAP_8_BIT_DATA;
|
|
/* FALLTHROUGH */
|
|
case 4:
|
|
sc->slot.host.caps |= MMC_CAP_4_BIT_DATA;
|
|
break;
|
|
case 1:
|
|
break;
|
|
default:
|
|
device_printf(dev, "Bad bus-width value %u\n", prop);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the slot is flagged with the non-removable property, set our flag
|
|
* to always force the SDHCI_CARD_PRESENT bit on.
|
|
*/
|
|
node = ofw_bus_get_node(dev);
|
|
if (OF_hasprop(node, "non-removable"))
|
|
sc->force_card_present = true;
|
|
|
|
bus_generic_probe(dev);
|
|
bus_generic_attach(dev);
|
|
|
|
sdhci_start_slot(&sc->slot);
|
|
|
|
return (0);
|
|
|
|
fail:
|
|
if (sc->intr_cookie)
|
|
bus_teardown_intr(dev, sc->irq_res, sc->intr_cookie);
|
|
if (sc->irq_res)
|
|
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
|
|
if (sc->mem_res)
|
|
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
|
|
|
|
return (err);
|
|
}
|
|
|
|
static int
|
|
ti_sdhci_probe(device_t dev)
|
|
{
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
|
|
device_set_desc(dev, "TI MMCHS (SDHCI 2.0)");
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
return (ENXIO);
|
|
}
|
|
|
|
static device_method_t ti_sdhci_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, ti_sdhci_probe),
|
|
DEVMETHOD(device_attach, ti_sdhci_attach),
|
|
DEVMETHOD(device_detach, ti_sdhci_detach),
|
|
|
|
/* Bus interface */
|
|
DEVMETHOD(bus_read_ivar, sdhci_generic_read_ivar),
|
|
DEVMETHOD(bus_write_ivar, sdhci_generic_write_ivar),
|
|
DEVMETHOD(bus_print_child, bus_generic_print_child),
|
|
|
|
/* MMC bridge interface */
|
|
DEVMETHOD(mmcbr_update_ios, ti_sdhci_update_ios),
|
|
DEVMETHOD(mmcbr_request, sdhci_generic_request),
|
|
DEVMETHOD(mmcbr_get_ro, ti_sdhci_get_ro),
|
|
DEVMETHOD(mmcbr_acquire_host, sdhci_generic_acquire_host),
|
|
DEVMETHOD(mmcbr_release_host, sdhci_generic_release_host),
|
|
|
|
/* SDHCI registers accessors */
|
|
DEVMETHOD(sdhci_read_1, ti_sdhci_read_1),
|
|
DEVMETHOD(sdhci_read_2, ti_sdhci_read_2),
|
|
DEVMETHOD(sdhci_read_4, ti_sdhci_read_4),
|
|
DEVMETHOD(sdhci_read_multi_4, ti_sdhci_read_multi_4),
|
|
DEVMETHOD(sdhci_write_1, ti_sdhci_write_1),
|
|
DEVMETHOD(sdhci_write_2, ti_sdhci_write_2),
|
|
DEVMETHOD(sdhci_write_4, ti_sdhci_write_4),
|
|
DEVMETHOD(sdhci_write_multi_4, ti_sdhci_write_multi_4),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static devclass_t ti_sdhci_devclass;
|
|
|
|
static driver_t ti_sdhci_driver = {
|
|
"sdhci_ti",
|
|
ti_sdhci_methods,
|
|
sizeof(struct ti_sdhci_softc),
|
|
};
|
|
|
|
DRIVER_MODULE(sdhci_ti, simplebus, ti_sdhci_driver, ti_sdhci_devclass, 0, 0);
|
|
MODULE_DEPEND(sdhci_ti, sdhci, 1, 1, 1);
|
|
DRIVER_MODULE(mmc, sdhci_ti, mmc_driver, mmc_devclass, NULL, NULL);
|
|
MODULE_DEPEND(sdhci_ti, mmc, 1, 1, 1);
|