diff options
Diffstat (limited to 'sys/arm/amlogic/aml8726/aml8726_mmc.c')
| -rw-r--r-- | sys/arm/amlogic/aml8726/aml8726_mmc.c | 1114 |
1 files changed, 0 insertions, 1114 deletions
diff --git a/sys/arm/amlogic/aml8726/aml8726_mmc.c b/sys/arm/amlogic/aml8726/aml8726_mmc.c deleted file mode 100644 index b204ab930946..000000000000 --- a/sys/arm/amlogic/aml8726/aml8726_mmc.c +++ /dev/null @@ -1,1114 +0,0 @@ -/*- - * Copyright 2013-2015 John Wehle <john@feith.com> - * All rights reserved. - * - * 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. - */ - -/* - * Amlogic aml8726 MMC host controller driver. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/bus.h> -#include <sys/kernel.h> -#include <sys/module.h> -#include <sys/lock.h> -#include <sys/mutex.h> -#include <sys/resource.h> -#include <sys/rman.h> - -#include <sys/gpio.h> - -#include <machine/bus.h> -#include <machine/cpu.h> - -#include <dev/ofw/ofw_bus.h> -#include <dev/ofw/ofw_bus_subr.h> - -#include <dev/mmc/bridge.h> -#include <dev/mmc/mmcbrvar.h> - -#include <arm/amlogic/aml8726/aml8726_mmc.h> - -#include "gpio_if.h" -#include "mmcbr_if.h" - -struct aml8726_mmc_gpio { - device_t dev; - uint32_t pin; - uint32_t pol; -}; - -struct aml8726_mmc_softc { - device_t dev; - struct resource *res[2]; - struct mtx mtx; - struct callout ch; - uint32_t port; - unsigned int ref_freq; - struct aml8726_mmc_gpio pwr_en; - int voltages[2]; - struct aml8726_mmc_gpio vselect; - bus_dma_tag_t dmatag; - bus_dmamap_t dmamap; - void *ih_cookie; - struct mmc_host host; - int bus_busy; - struct mmc_command *cmd; - uint32_t stop_timeout; -}; - -static struct resource_spec aml8726_mmc_spec[] = { - { SYS_RES_MEMORY, 0, RF_ACTIVE }, - { SYS_RES_IRQ, 0, RF_ACTIVE }, - { -1, 0 } -}; - -#define AML_MMC_LOCK(sc) mtx_lock(&(sc)->mtx) -#define AML_MMC_UNLOCK(sc) mtx_unlock(&(sc)->mtx) -#define AML_MMC_LOCK_ASSERT(sc) mtx_assert(&(sc)->mtx, MA_OWNED) -#define AML_MMC_LOCK_INIT(sc) \ - mtx_init(&(sc)->mtx, device_get_nameunit((sc)->dev), \ - "mmc", MTX_DEF) -#define AML_MMC_LOCK_DESTROY(sc) mtx_destroy(&(sc)->mtx); - -#define CSR_WRITE_4(sc, reg, val) bus_write_4((sc)->res[0], reg, (val)) -#define CSR_READ_4(sc, reg) bus_read_4((sc)->res[0], reg) -#define CSR_BARRIER(sc, reg) bus_barrier((sc)->res[0], reg, 4, \ - (BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE)) - -#define PWR_ON_FLAG(pol) ((pol) == 0 ? GPIO_PIN_LOW : \ - GPIO_PIN_HIGH) -#define PWR_OFF_FLAG(pol) ((pol) == 0 ? GPIO_PIN_HIGH : \ - GPIO_PIN_LOW) - -#define MSECS_TO_TICKS(ms) (((ms)*hz)/1000 + 1) - -static void aml8726_mmc_timeout(void *arg); - -static unsigned int -aml8726_mmc_clk(phandle_t node) -{ - pcell_t prop; - ssize_t len; - phandle_t clk_node; - - len = OF_getencprop(node, "clocks", &prop, sizeof(prop)); - if ((len / sizeof(prop)) != 1 || prop == 0 || - (clk_node = OF_node_from_xref(prop)) == 0) - return (0); - - len = OF_getencprop(clk_node, "clock-frequency", &prop, sizeof(prop)); - if ((len / sizeof(prop)) != 1 || prop == 0) - return (0); - - return ((unsigned int)prop); -} - -static uint32_t -aml8726_mmc_freq(struct aml8726_mmc_softc *sc, uint32_t divisor) -{ - - return (sc->ref_freq / ((divisor + 1) * 2)); -} - -static uint32_t -aml8726_mmc_div(struct aml8726_mmc_softc *sc, uint32_t desired_freq) -{ - uint32_t divisor; - - divisor = sc->ref_freq / (desired_freq * 2); - - if (divisor == 0) - divisor = 1; - - divisor -= 1; - - if (aml8726_mmc_freq(sc, divisor) > desired_freq) - divisor += 1; - - if (divisor > (AML_MMC_CONFIG_CMD_CLK_DIV_MASK >> - AML_MMC_CONFIG_CMD_CLK_DIV_SHIFT)) { - divisor = AML_MMC_CONFIG_CMD_CLK_DIV_MASK >> - AML_MMC_CONFIG_CMD_CLK_DIV_SHIFT; - } - - return (divisor); -} - -static void -aml8726_mmc_mapmem(void *arg, bus_dma_segment_t *segs, int nseg, int error) -{ - bus_addr_t *busaddrp; - - /* - * There should only be one bus space address since - * bus_dma_tag_create was called with nsegments = 1. - */ - - busaddrp = (bus_addr_t *)arg; - *busaddrp = segs->ds_addr; -} - -static int -aml8726_mmc_power_off(struct aml8726_mmc_softc *sc) -{ - - if (sc->pwr_en.dev == NULL) - return (0); - - return (GPIO_PIN_SET(sc->pwr_en.dev, sc->pwr_en.pin, - PWR_OFF_FLAG(sc->pwr_en.pol))); -} - -static int -aml8726_mmc_power_on(struct aml8726_mmc_softc *sc) -{ - - if (sc->pwr_en.dev == NULL) - return (0); - - return (GPIO_PIN_SET(sc->pwr_en.dev, sc->pwr_en.pin, - PWR_ON_FLAG(sc->pwr_en.pol))); -} - -static void -aml8726_mmc_soft_reset(struct aml8726_mmc_softc *sc, boolean_t enable_irq) -{ - uint32_t icr; - - icr = AML_MMC_IRQ_CONFIG_SOFT_RESET; - - if (enable_irq == true) - icr |= AML_MMC_IRQ_CONFIG_CMD_DONE_EN; - - CSR_WRITE_4(sc, AML_MMC_IRQ_CONFIG_REG, icr); - CSR_BARRIER(sc, AML_MMC_IRQ_CONFIG_REG); -} - -static int -aml8726_mmc_start_command(struct aml8726_mmc_softc *sc, struct mmc_command *cmd) -{ - struct mmc_ios *ios = &sc->host.ios; - bus_addr_t baddr; - uint32_t block_size; - uint32_t bus_width; - uint32_t cmdr; - uint32_t extr; - uint32_t mcfgr; - uint32_t nbits_per_pkg; - uint32_t timeout; - int error; - struct mmc_data *data; - - if (cmd->opcode > 0x3f) - return (MMC_ERR_INVALID); - - /* - * Ensure the hardware state machine is in a known state. - */ - aml8726_mmc_soft_reset(sc, true); - - /* - * Start and transmission bits are per section 4.7.2 of the: - * - * SD Specifications Part 1 - * Physical Layer Simplified Specification - * Version 4.10 - */ - cmdr = AML_MMC_CMD_START_BIT | AML_MMC_CMD_TRANS_BIT_HOST | cmd->opcode; - baddr = 0; - extr = 0; - mcfgr = sc->port; - timeout = AML_MMC_CMD_TIMEOUT; - - /* - * If this is a linked command, then use the previous timeout. - */ - if (cmd == cmd->mrq->stop && sc->stop_timeout) - timeout = sc->stop_timeout; - sc->stop_timeout = 0; - - if ((cmd->flags & MMC_RSP_136) != 0) { - cmdr |= AML_MMC_CMD_RESP_CRC7_FROM_8; - cmdr |= (133 << AML_MMC_CMD_RESP_BITS_SHIFT); - } else if ((cmd->flags & MMC_RSP_PRESENT) != 0) - cmdr |= (45 << AML_MMC_CMD_RESP_BITS_SHIFT); - - if ((cmd->flags & MMC_RSP_CRC) == 0) - cmdr |= AML_MMC_CMD_RESP_NO_CRC7; - - if ((cmd->flags & MMC_RSP_BUSY) != 0) - cmdr |= AML_MMC_CMD_CHECK_DAT0_BUSY; - - data = cmd->data; - - if (data && data->len && - (data->flags & (MMC_DATA_READ | MMC_DATA_WRITE)) != 0) { - block_size = data->len; - - if ((data->flags & MMC_DATA_MULTI) != 0) { - block_size = MMC_SECTOR_SIZE; - if ((data->len % block_size) != 0) - return (MMC_ERR_INVALID); - } - - cmdr |= (((data->len / block_size) - 1) << - AML_MMC_CMD_REP_PKG_CNT_SHIFT); - - mcfgr |= (data->flags & MMC_DATA_STREAM) ? - AML_MMC_MULT_CONFIG_STREAM_EN : 0; - - /* - * The number of bits per package equals the number - * of data bits + the number of CRC bits. There are - * 16 bits of CRC calculate per bus line. - * - * A completed package appears to be detected by when - * a counter decremented by the width underflows, thus - * a value of zero always transfers 1 (or 4 bits depending - * on the mode) which is why bus_width is subtracted. - */ - bus_width = (ios->bus_width == bus_width_4) ? 4 : 1; - nbits_per_pkg = block_size * 8 + 16 * bus_width - bus_width; - if (nbits_per_pkg > 0x3fff) - return (MMC_ERR_INVALID); - - extr |= (nbits_per_pkg << AML_MMC_EXTENSION_PKT_SIZE_SHIFT); - - error = bus_dmamap_load(sc->dmatag, sc->dmamap, - data->data, data->len, aml8726_mmc_mapmem, &baddr, - BUS_DMA_NOWAIT); - if (error) - return (MMC_ERR_NO_MEMORY); - - if ((data->flags & MMC_DATA_READ) != 0) { - cmdr |= AML_MMC_CMD_RESP_HAS_DATA; - bus_dmamap_sync(sc->dmatag, sc->dmamap, - BUS_DMASYNC_PREREAD); - timeout = AML_MMC_READ_TIMEOUT * - (data->len / block_size); - } else { - cmdr |= AML_MMC_CMD_CMD_HAS_DATA; - bus_dmamap_sync(sc->dmatag, sc->dmamap, - BUS_DMASYNC_PREWRITE); - timeout = AML_MMC_WRITE_TIMEOUT * - (data->len / block_size); - } - - /* - * Stop terminates a multiblock read / write and thus - * can take as long to execute as an actual read / write. - */ - if (cmd->mrq->stop != NULL) - sc->stop_timeout = timeout; - } - - sc->cmd = cmd; - - cmd->error = MMC_ERR_NONE; - - if (timeout > AML_MMC_MAX_TIMEOUT) - timeout = AML_MMC_MAX_TIMEOUT; - - callout_reset(&sc->ch, MSECS_TO_TICKS(timeout), - aml8726_mmc_timeout, sc); - - CSR_WRITE_4(sc, AML_MMC_CMD_ARGUMENT_REG, cmd->arg); - CSR_WRITE_4(sc, AML_MMC_MULT_CONFIG_REG, mcfgr); - CSR_WRITE_4(sc, AML_MMC_EXTENSION_REG, extr); - CSR_WRITE_4(sc, AML_MMC_DMA_ADDR_REG, (uint32_t)baddr); - - CSR_WRITE_4(sc, AML_MMC_CMD_SEND_REG, cmdr); - CSR_BARRIER(sc, AML_MMC_CMD_SEND_REG); - - return (MMC_ERR_NONE); -} - -static void -aml8726_mmc_finish_command(struct aml8726_mmc_softc *sc, int mmc_error) -{ - int mmc_stop_error; - struct mmc_command *cmd; - struct mmc_command *stop_cmd; - struct mmc_data *data; - - AML_MMC_LOCK_ASSERT(sc); - - /* Clear all interrupts since the request is no longer in flight. */ - CSR_WRITE_4(sc, AML_MMC_IRQ_STATUS_REG, AML_MMC_IRQ_STATUS_CLEAR_IRQ); - CSR_BARRIER(sc, AML_MMC_IRQ_STATUS_REG); - - /* In some cases (e.g. finish called via timeout) this is a NOP. */ - callout_stop(&sc->ch); - - cmd = sc->cmd; - sc->cmd = NULL; - - cmd->error = mmc_error; - - data = cmd->data; - - if (data && data->len && - (data->flags & (MMC_DATA_READ | MMC_DATA_WRITE)) != 0) { - if ((data->flags & MMC_DATA_READ) != 0) - bus_dmamap_sync(sc->dmatag, sc->dmamap, - BUS_DMASYNC_POSTREAD); - else - bus_dmamap_sync(sc->dmatag, sc->dmamap, - BUS_DMASYNC_POSTWRITE); - bus_dmamap_unload(sc->dmatag, sc->dmamap); - } - - /* - * If there's a linked stop command, then start the stop command. - * In order to establish a known state attempt the stop command - * even if the original request encountered an error. - */ - - stop_cmd = (cmd->mrq->stop != cmd) ? cmd->mrq->stop : NULL; - - if (stop_cmd != NULL) { - mmc_stop_error = aml8726_mmc_start_command(sc, stop_cmd); - if (mmc_stop_error == MMC_ERR_NONE) { - AML_MMC_UNLOCK(sc); - return; - } - stop_cmd->error = mmc_stop_error; - } - - AML_MMC_UNLOCK(sc); - - /* Execute the callback after dropping the lock. */ - if (cmd->mrq) - cmd->mrq->done(cmd->mrq); -} - -static void -aml8726_mmc_timeout(void *arg) -{ - struct aml8726_mmc_softc *sc = (struct aml8726_mmc_softc *)arg; - - /* - * The command failed to complete in time so forcefully - * terminate it. - */ - aml8726_mmc_soft_reset(sc, false); - - /* - * Ensure the command has terminated before continuing on - * to things such as bus_dmamap_sync / bus_dmamap_unload. - */ - while ((CSR_READ_4(sc, AML_MMC_IRQ_STATUS_REG) & - AML_MMC_IRQ_STATUS_CMD_BUSY) != 0) - cpu_spinwait(); - - aml8726_mmc_finish_command(sc, MMC_ERR_TIMEOUT); -} - -static void -aml8726_mmc_intr(void *arg) -{ - struct aml8726_mmc_softc *sc = (struct aml8726_mmc_softc *)arg; - uint32_t cmdr; - uint32_t isr; - uint32_t mcfgr; - uint32_t previous_byte; - uint32_t resp; - int mmc_error; - unsigned int i; - - AML_MMC_LOCK(sc); - - isr = CSR_READ_4(sc, AML_MMC_IRQ_STATUS_REG); - cmdr = CSR_READ_4(sc, AML_MMC_CMD_SEND_REG); - - if (sc->cmd == NULL) - goto spurious; - - mmc_error = MMC_ERR_NONE; - - if ((isr & AML_MMC_IRQ_STATUS_CMD_DONE_IRQ) != 0) { - /* Check for CRC errors if the command has completed. */ - if ((cmdr & AML_MMC_CMD_RESP_NO_CRC7) == 0 && - (isr & AML_MMC_IRQ_STATUS_RESP_CRC7_OK) == 0) - mmc_error = MMC_ERR_BADCRC; - if ((cmdr & AML_MMC_CMD_RESP_HAS_DATA) != 0 && - (isr & AML_MMC_IRQ_STATUS_RD_CRC16_OK) == 0) - mmc_error = MMC_ERR_BADCRC; - if ((cmdr & AML_MMC_CMD_CMD_HAS_DATA) != 0 && - (isr & AML_MMC_IRQ_STATUS_WR_CRC16_OK) == 0) - mmc_error = MMC_ERR_BADCRC; - } else { -spurious: - - /* - * Clear spurious interrupts while leaving intacted any - * interrupts that may have occurred after we read the - * interrupt status register. - */ - - CSR_WRITE_4(sc, AML_MMC_IRQ_STATUS_REG, - (AML_MMC_IRQ_STATUS_CLEAR_IRQ & isr)); - CSR_BARRIER(sc, AML_MMC_IRQ_STATUS_REG); - AML_MMC_UNLOCK(sc); - return; - } - - if ((cmdr & AML_MMC_CMD_RESP_BITS_MASK) != 0) { - mcfgr = sc->port; - mcfgr |= AML_MMC_MULT_CONFIG_RESP_READOUT_EN; - CSR_WRITE_4(sc, AML_MMC_MULT_CONFIG_REG, mcfgr); - - if ((cmdr & AML_MMC_CMD_RESP_CRC7_FROM_8) != 0) { - /* - * Controller supplies 135:8 instead of - * 127:0 so discard the leading 8 bits - * and provide a trailing 8 zero bits - * where the CRC belongs. - */ - - previous_byte = 0; - - for (i = 0; i < 4; i++) { - resp = CSR_READ_4(sc, AML_MMC_CMD_ARGUMENT_REG); - sc->cmd->resp[3 - i] = (resp << 8) | - previous_byte; - previous_byte = (resp >> 24) & 0xff; - } - } else - sc->cmd->resp[0] = CSR_READ_4(sc, - AML_MMC_CMD_ARGUMENT_REG); - } - - if ((isr & AML_MMC_IRQ_STATUS_CMD_BUSY) != 0 && - /* - * A multiblock operation may keep the hardware - * busy until stop transmission is executed. - */ - (isr & AML_MMC_IRQ_STATUS_CMD_DONE_IRQ) == 0) { - if (mmc_error == MMC_ERR_NONE) - mmc_error = MMC_ERR_FAILED; - - /* - * Issue a soft reset to terminate the command. - * - * Ensure the command has terminated before continuing on - * to things such as bus_dmamap_sync / bus_dmamap_unload. - */ - - aml8726_mmc_soft_reset(sc, false); - - while ((CSR_READ_4(sc, AML_MMC_IRQ_STATUS_REG) & - AML_MMC_IRQ_STATUS_CMD_BUSY) != 0) - cpu_spinwait(); - } - - aml8726_mmc_finish_command(sc, mmc_error); -} - -static int -aml8726_mmc_probe(device_t dev) -{ - - if (!ofw_bus_status_okay(dev)) - return (ENXIO); - - if (!ofw_bus_is_compatible(dev, "amlogic,aml8726-mmc")) - return (ENXIO); - - device_set_desc(dev, "Amlogic aml8726 MMC"); - - return (BUS_PROBE_DEFAULT); -} - -static int -aml8726_mmc_attach(device_t dev) -{ - struct aml8726_mmc_softc *sc = device_get_softc(dev); - char *function_name; - char *voltages; - char *voltage; - int error; - int nvoltages; - pcell_t prop[3]; - phandle_t node; - ssize_t len; - device_t child; - - sc->dev = dev; - - node = ofw_bus_get_node(dev); - - sc->ref_freq = aml8726_mmc_clk(node); - - if (sc->ref_freq == 0) { - device_printf(dev, "missing clocks attribute in FDT\n"); - return (ENXIO); - } - - /* - * The pins must be specified as part of the device in order - * to know which port to used. - */ - - len = OF_getencprop(node, "pinctrl-0", prop, sizeof(prop)); - - if ((len / sizeof(prop[0])) != 1 || prop[0] == 0) { - device_printf(dev, "missing pinctrl-0 attribute in FDT\n"); - return (ENXIO); - } - - len = OF_getprop_alloc(OF_node_from_xref(prop[0]), "amlogic,function", - (void **)&function_name); - - if (len < 0) { - device_printf(dev, - "missing amlogic,function attribute in FDT\n"); - return (ENXIO); - } - - if (strncmp("sdio-a", function_name, len) == 0) - sc->port = AML_MMC_MULT_CONFIG_PORT_A; - else if (strncmp("sdio-b", function_name, len) == 0) - sc->port = AML_MMC_MULT_CONFIG_PORT_B; - else if (strncmp("sdio-c", function_name, len) == 0) - sc->port = AML_MMC_MULT_CONFIG_PORT_C; - else { - device_printf(dev, "unknown function attribute %.*s in FDT\n", - len, function_name); - OF_prop_free(function_name); - return (ENXIO); - } - - OF_prop_free(function_name); - - sc->pwr_en.dev = NULL; - - len = OF_getencprop(node, "mmc-pwr-en", prop, sizeof(prop)); - if (len > 0) { - if ((len / sizeof(prop[0])) == 3) { - sc->pwr_en.dev = OF_device_from_xref(prop[0]); - sc->pwr_en.pin = prop[1]; - sc->pwr_en.pol = prop[2]; - } - - if (sc->pwr_en.dev == NULL) { - device_printf(dev, - "unable to process mmc-pwr-en attribute in FDT\n"); - return (ENXIO); - } - - /* Turn off power and then configure the output driver. */ - if (aml8726_mmc_power_off(sc) != 0 || - GPIO_PIN_SETFLAGS(sc->pwr_en.dev, sc->pwr_en.pin, - GPIO_PIN_OUTPUT) != 0) { - device_printf(dev, - "could not use gpio to control power\n"); - return (ENXIO); - } - } - - len = OF_getprop_alloc(node, "mmc-voltages", - (void **)&voltages); - - if (len < 0) { - device_printf(dev, "missing mmc-voltages attribute in FDT\n"); - return (ENXIO); - } - - sc->voltages[0] = 0; - sc->voltages[1] = 0; - - voltage = voltages; - nvoltages = 0; - - while (len && nvoltages < 2) { - if (strncmp("1.8", voltage, len) == 0) - sc->voltages[nvoltages] = MMC_OCR_LOW_VOLTAGE; - else if (strncmp("3.3", voltage, len) == 0) - sc->voltages[nvoltages] = MMC_OCR_320_330 | - MMC_OCR_330_340; - else { - device_printf(dev, - "unknown voltage attribute %.*s in FDT\n", - len, voltage); - OF_prop_free(voltages); - return (ENXIO); - } - - nvoltages++; - - /* queue up next string */ - while (*voltage && len) { - voltage++; - len--; - } - if (len) { - voltage++; - len--; - } - } - - OF_prop_free(voltages); - - sc->vselect.dev = NULL; - - len = OF_getencprop(node, "mmc-vselect", prop, sizeof(prop)); - if (len > 0) { - if ((len / sizeof(prop[0])) == 2) { - sc->vselect.dev = OF_device_from_xref(prop[0]); - sc->vselect.pin = prop[1]; - sc->vselect.pol = 1; - } - - if (sc->vselect.dev == NULL) { - device_printf(dev, - "unable to process mmc-vselect attribute in FDT\n"); - return (ENXIO); - } - - /* - * With the power off select voltage 0 and then - * configure the output driver. - */ - if (GPIO_PIN_SET(sc->vselect.dev, sc->vselect.pin, 0) != 0 || - GPIO_PIN_SETFLAGS(sc->vselect.dev, sc->vselect.pin, - GPIO_PIN_OUTPUT) != 0) { - device_printf(dev, - "could not use gpio to set voltage\n"); - return (ENXIO); - } - } - - if (nvoltages == 0) { - device_printf(dev, "no voltages in FDT\n"); - return (ENXIO); - } else if (nvoltages == 1 && sc->vselect.dev != NULL) { - device_printf(dev, "only one voltage in FDT\n"); - return (ENXIO); - } else if (nvoltages == 2 && sc->vselect.dev == NULL) { - device_printf(dev, "too many voltages in FDT\n"); - return (ENXIO); - } - - if (bus_alloc_resources(dev, aml8726_mmc_spec, sc->res)) { - device_printf(dev, "could not allocate resources for device\n"); - return (ENXIO); - } - - AML_MMC_LOCK_INIT(sc); - - error = bus_dma_tag_create(bus_get_dma_tag(dev), AML_MMC_ALIGN_DMA, 0, - BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, - AML_MMC_MAX_DMA, 1, AML_MMC_MAX_DMA, 0, NULL, NULL, &sc->dmatag); - if (error) - goto fail; - - error = bus_dmamap_create(sc->dmatag, 0, &sc->dmamap); - - if (error) - goto fail; - - error = bus_setup_intr(dev, sc->res[1], INTR_TYPE_MISC | INTR_MPSAFE, - NULL, aml8726_mmc_intr, sc, &sc->ih_cookie); - if (error) { - device_printf(dev, "could not setup interrupt handler\n"); - goto fail; - } - - callout_init_mtx(&sc->ch, &sc->mtx, CALLOUT_RETURNUNLOCKED); - - sc->host.f_min = aml8726_mmc_freq(sc, aml8726_mmc_div(sc, 200000)); - sc->host.f_max = aml8726_mmc_freq(sc, aml8726_mmc_div(sc, 50000000)); - sc->host.host_ocr = sc->voltages[0] | sc->voltages[1]; - sc->host.caps = MMC_CAP_4_BIT_DATA | MMC_CAP_HSPEED; - - child = device_add_child(dev, "mmc", -1); - - if (!child) { - device_printf(dev, "could not add mmc\n"); - error = ENXIO; - goto fail; - } - - error = device_probe_and_attach(child); - - if (error) { - device_printf(dev, "could not attach mmc\n"); - goto fail; - } - - return (0); - -fail: - if (sc->ih_cookie) - bus_teardown_intr(dev, sc->res[1], sc->ih_cookie); - - if (sc->dmamap) - bus_dmamap_destroy(sc->dmatag, sc->dmamap); - - if (sc->dmatag) - bus_dma_tag_destroy(sc->dmatag); - - AML_MMC_LOCK_DESTROY(sc); - - aml8726_mmc_power_off(sc); - - bus_release_resources(dev, aml8726_mmc_spec, sc->res); - - return (error); -} - -static int -aml8726_mmc_detach(device_t dev) -{ - struct aml8726_mmc_softc *sc = device_get_softc(dev); - - AML_MMC_LOCK(sc); - - if (sc->cmd != NULL) { - AML_MMC_UNLOCK(sc); - return (EBUSY); - } - - /* - * Turn off the power, reset the hardware state machine, - * disable the interrupts, and clear the interrupts. - */ - (void)aml8726_mmc_power_off(sc); - aml8726_mmc_soft_reset(sc, false); - CSR_WRITE_4(sc, AML_MMC_IRQ_STATUS_REG, AML_MMC_IRQ_STATUS_CLEAR_IRQ); - - /* This should be a NOP since no command was in flight. */ - callout_stop(&sc->ch); - - AML_MMC_UNLOCK(sc); - - bus_generic_detach(dev); - - bus_teardown_intr(dev, sc->res[1], sc->ih_cookie); - - bus_dmamap_destroy(sc->dmatag, sc->dmamap); - - bus_dma_tag_destroy(sc->dmatag); - - AML_MMC_LOCK_DESTROY(sc); - - bus_release_resources(dev, aml8726_mmc_spec, sc->res); - - return (0); -} - -static int -aml8726_mmc_shutdown(device_t dev) -{ - struct aml8726_mmc_softc *sc = device_get_softc(dev); - - /* - * Turn off the power, reset the hardware state machine, - * disable the interrupts, and clear the interrupts. - */ - (void)aml8726_mmc_power_off(sc); - aml8726_mmc_soft_reset(sc, false); - CSR_WRITE_4(sc, AML_MMC_IRQ_STATUS_REG, AML_MMC_IRQ_STATUS_CLEAR_IRQ); - - return (0); -} - -static int -aml8726_mmc_update_ios(device_t bus, device_t child) -{ - struct aml8726_mmc_softc *sc = device_get_softc(bus); - struct mmc_ios *ios = &sc->host.ios; - int error; - int i; - uint32_t cfgr; - - cfgr = (2 << AML_MMC_CONFIG_WR_CRC_STAT_SHIFT) | - (2 << AML_MMC_CONFIG_WR_DELAY_SHIFT) | - AML_MMC_CONFIG_DMA_ENDIAN_SBW | - (39 << AML_MMC_CONFIG_CMD_ARG_BITS_SHIFT); - - switch (ios->bus_width) { - case bus_width_4: - cfgr |= AML_MMC_CONFIG_BUS_WIDTH_4; - break; - case bus_width_1: - cfgr |= AML_MMC_CONFIG_BUS_WIDTH_1; - break; - default: - return (EINVAL); - } - - cfgr |= aml8726_mmc_div(sc, ios->clock) << - AML_MMC_CONFIG_CMD_CLK_DIV_SHIFT; - - CSR_WRITE_4(sc, AML_MMC_CONFIG_REG, cfgr); - - error = 0; - - switch (ios->power_mode) { - case power_up: - /* - * Configure and power on the regulator so that the - * voltage stabilizes prior to powering on the card. - */ - if (sc->vselect.dev != NULL) { - for (i = 0; i < 2; i++) - if ((sc->voltages[i] & (1 << ios->vdd)) != 0) - break; - if (i >= 2) - return (EINVAL); - error = GPIO_PIN_SET(sc->vselect.dev, - sc->vselect.pin, i); - } - break; - case power_on: - error = aml8726_mmc_power_on(sc); - break; - case power_off: - error = aml8726_mmc_power_off(sc); - break; - default: - return (EINVAL); - } - - return (error); -} - -static int -aml8726_mmc_request(device_t bus, device_t child, struct mmc_request *req) -{ - struct aml8726_mmc_softc *sc = device_get_softc(bus); - int mmc_error; - - AML_MMC_LOCK(sc); - - if (sc->cmd != NULL) { - AML_MMC_UNLOCK(sc); - return (EBUSY); - } - - mmc_error = aml8726_mmc_start_command(sc, req->cmd); - - AML_MMC_UNLOCK(sc); - - /* Execute the callback after dropping the lock. */ - if (mmc_error != MMC_ERR_NONE) { - req->cmd->error = mmc_error; - req->done(req); - } - - return (0); -} - -static int -aml8726_mmc_read_ivar(device_t bus, device_t child, - int which, uintptr_t *result) -{ - struct aml8726_mmc_softc *sc = device_get_softc(bus); - - switch (which) { - case MMCBR_IVAR_BUS_MODE: - *(int *)result = sc->host.ios.bus_mode; - break; - case MMCBR_IVAR_BUS_WIDTH: - *(int *)result = sc->host.ios.bus_width; - break; - case MMCBR_IVAR_CHIP_SELECT: - *(int *)result = sc->host.ios.chip_select; - break; - case MMCBR_IVAR_CLOCK: - *(int *)result = sc->host.ios.clock; - break; - case MMCBR_IVAR_F_MIN: - *(int *)result = sc->host.f_min; - break; - case MMCBR_IVAR_F_MAX: - *(int *)result = sc->host.f_max; - break; - case MMCBR_IVAR_HOST_OCR: - *(int *)result = sc->host.host_ocr; - break; - case MMCBR_IVAR_MODE: - *(int *)result = sc->host.mode; - break; - case MMCBR_IVAR_OCR: - *(int *)result = sc->host.ocr; - break; - case MMCBR_IVAR_POWER_MODE: - *(int *)result = sc->host.ios.power_mode; - break; - case MMCBR_IVAR_RETUNE_REQ: - *(int *)result = return_req_none; - case MMCBR_IVAR_VDD: - *(int *)result = sc->host.ios.vdd; - break; - case MMCBR_IVAR_VCCQ: - *result = sc->sc_host.ios.vccq; - break; - case MMCBR_IVAR_CAPS: - *(int *)result = sc->host.caps; - break; - case MMCBR_IVAR_TIMING: - *(int *)result = sc->sc_host.ios.timing; - break; - case MMCBR_IVAR_MAX_DATA: - *(int *)result = AML_MMC_MAX_DMA / MMC_SECTOR_SIZE; - break; - case MMCBR_IVAR_MAX_BUSY_TIMEOUT: - *(int *)result = 1000000; /* 1s max */ - break; - default: - return (EINVAL); - } - - return (0); -} - -static int -aml8726_mmc_write_ivar(device_t bus, device_t child, - int which, uintptr_t value) -{ - struct aml8726_mmc_softc *sc = device_get_softc(bus); - - switch (which) { - case MMCBR_IVAR_BUS_MODE: - sc->host.ios.bus_mode = value; - break; - case MMCBR_IVAR_BUS_WIDTH: - sc->host.ios.bus_width = value; - break; - case MMCBR_IVAR_CHIP_SELECT: - sc->host.ios.chip_select = value; - break; - case MMCBR_IVAR_CLOCK: - sc->host.ios.clock = value; - break; - case MMCBR_IVAR_MODE: - sc->host.mode = value; - break; - case MMCBR_IVAR_OCR: - sc->host.ocr = value; - break; - case MMCBR_IVAR_POWER_MODE: - sc->host.ios.power_mode = value; - break; - case MMCBR_IVAR_VDD: - sc->host.ios.vdd = value; - break; - case MMCBR_IVAR_VCCQ: - sc->sc_host.ios.vccq = value; - break; - case MMCBR_IVAR_TIMING: - sc->sc_host.ios.timing = value; - break; - /* These are read-only */ - case MMCBR_IVAR_CAPS: - case MMCBR_IVAR_HOST_OCR: - case MMCBR_IVAR_F_MIN: - case MMCBR_IVAR_F_MAX: - case MMCBR_IVAR_MAX_DATA: - default: - return (EINVAL); - } - - return (0); -} - -static int -aml8726_mmc_get_ro(device_t bus, device_t child) -{ - - return (0); -} - -static int -aml8726_mmc_acquire_host(device_t bus, device_t child) -{ - struct aml8726_mmc_softc *sc = device_get_softc(bus); - - AML_MMC_LOCK(sc); - - while (sc->bus_busy) - mtx_sleep(sc, &sc->mtx, PZERO, "mmc", hz / 5); - sc->bus_busy++; - - AML_MMC_UNLOCK(sc); - - return (0); -} - -static int -aml8726_mmc_release_host(device_t bus, device_t child) -{ - struct aml8726_mmc_softc *sc = device_get_softc(bus); - - AML_MMC_LOCK(sc); - - sc->bus_busy--; - wakeup(sc); - - AML_MMC_UNLOCK(sc); - - return (0); -} - -static device_method_t aml8726_mmc_methods[] = { - /* Device interface */ - DEVMETHOD(device_probe, aml8726_mmc_probe), - DEVMETHOD(device_attach, aml8726_mmc_attach), - DEVMETHOD(device_detach, aml8726_mmc_detach), - DEVMETHOD(device_shutdown, aml8726_mmc_shutdown), - - /* Bus interface */ - DEVMETHOD(bus_read_ivar, aml8726_mmc_read_ivar), - DEVMETHOD(bus_write_ivar, aml8726_mmc_write_ivar), - - /* MMC bridge interface */ - DEVMETHOD(mmcbr_update_ios, aml8726_mmc_update_ios), - DEVMETHOD(mmcbr_request, aml8726_mmc_request), - DEVMETHOD(mmcbr_get_ro, aml8726_mmc_get_ro), - DEVMETHOD(mmcbr_acquire_host, aml8726_mmc_acquire_host), - DEVMETHOD(mmcbr_release_host, aml8726_mmc_release_host), - - DEVMETHOD_END -}; - -static driver_t aml8726_mmc_driver = { - "aml8726_mmc", - aml8726_mmc_methods, - sizeof(struct aml8726_mmc_softc), -}; - -static devclass_t aml8726_mmc_devclass; - -DRIVER_MODULE(aml8726_mmc, simplebus, aml8726_mmc_driver, - aml8726_mmc_devclass, NULL, NULL); -MODULE_DEPEND(aml8726_mmc, aml8726_gpio, 1, 1, 1); -MMC_DECLARE_BRIDGE(aml8726_mmc); |