diff options
Diffstat (limited to 'sys/dev/mmc/mmcspi.c')
| -rw-r--r-- | sys/dev/mmc/mmcspi.c | 2378 |
1 files changed, 2378 insertions, 0 deletions
diff --git a/sys/dev/mmc/mmcspi.c b/sys/dev/mmc/mmcspi.c new file mode 100644 index 000000000000..d18f7aeb8cc0 --- /dev/null +++ b/sys/dev/mmc/mmcspi.c @@ -0,0 +1,2378 @@ +/*- + * Copyright (c) 2012-2025 Patrick Kelsey. All rights reserved. + * Copyright (c) 2025 Ruslan Bukin <br@bsdpad.com> + * + * 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 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 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. + * + * Portions of this software may have been developed with reference to + * the SD Simplified Specification. The following disclaimer may apply: + * + * The following conditions apply to the release of the simplified + * specification ("Simplified Specification") by the SD Card Association and + * the SD Group. The Simplified Specification is a subset of the complete SD + * Specification which is owned by the SD Card Association and the SD + * Group. This Simplified Specification is provided on a non-confidential + * basis subject to the disclaimers below. Any implementation of the + * Simplified Specification may require a license from the SD Card + * Association, SD Group, SD-3C LLC or other third parties. + * + * Disclaimers: + * + * The information contained in the Simplified Specification is presented only + * as a standard specification for SD Cards and SD Host/Ancillary products and + * is provided "AS-IS" without any representations or warranties of any + * kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD + * Card Association for any damages, any infringements of patents or other + * right of the SD Group, SD-3C LLC, the SD Card Association or any third + * parties, which may result from its use. No license is granted by + * implication, estoppel or otherwise under any patent or other rights of the + * SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing + * herein shall be construed as an obligation by the SD Group, the SD-3C LLC + * or the SD Card Association to disclose or distribute any technical + * information, know-how or other confidential information to any third party. + * + * + * CRC routines adapted from public domain code written by Lammert Bies. + * + * + * This is an implementation of mmcbr that communicates with SD/MMC cards in + * SPI mode via spibus_if. In order to minimize changes to the existing + * MMC/SD stack (and allow for maximal reuse of the same), the behavior of + * the SD-bus command set is emulated as much as possible, where required. + * + * The SPI bus ownership behavior is to acquire the SPI bus for the entire + * duration that the MMC host is acquired. + * + * CRC checking is enabled by default, but can be disabled at runtime + * per-card via sysctl (e.g. sysctl dev.mmcspi.0.use_crc=0). + * + * Considered, but not implemented: + * - Card presence detection + * - Card power control + * - Detection of lock switch state on cards that have them + * - Yielding the CPU during long card busy cycles + * + * Originally developed and tested using a MicroTik RouterBOARD RB450G and + * 31 microSD cards available circa 2012. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/conf.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/module.h> +#include <sys/mutex.h> +#include <sys/resource.h> +#include <sys/sysctl.h> + +#include <dev/mmc/bridge.h> +#include <dev/mmc/mmcreg.h> +#include <dev/mmc/mmcbrvar.h> +#include <dev/spibus/spi.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include "mmcbr_if.h" +#include "spibus_if.h" + +#define MMCSPI_RETRIES 3 +#define MMCSPI_TIMEOUT_SEC 3 + +#define MMCSPI_MAX_RSP_LEN 5 /* max length of an Rn response */ +#define MMCSPI_OCR_LEN 4 + +#define MMCSPI_DATA_BLOCK_LEN 512 +#define MMCSPI_DATA_CRC_LEN 2 + +#define MMCSPI_POLL_LEN 8 /* amount to read when searching */ + +#define MMCSPI_R1_MASK 0x80 /* mask used to search for R1 tokens */ +#define MMCSPI_R1_VALUE 0x00 /* value used to search for R1 tokens */ +#define MMCSPI_DR_MASK 0x11 /* mask used to search for data resp tokens */ +#define MMCSPI_DR_VALUE 0x01 /* value used to search for data resp tokens */ + +#define MMCSPI_DR_ERR_MASK 0x0e +#define MMCSPI_DR_ERR_NONE 0x04 +#define MMCSPI_DR_ERR_CRC 0x0a +#define MMCSPI_DR_ERR_WRITE 0x0c + +#define MMCSPI_TOKEN_SB 0xfe /* start block token for read single, + read multi, and write single */ +#define MMCSPI_TOKEN_SB_WM 0xfc /* start block token for write multi */ +#define MMCSPI_TOKEN_ST 0xfd /* stop transmission token */ +#define MMCSPI_IS_DE_TOKEN(x) (0 == ((x) & 0xf0)) /* detector for data + error token */ + +#define MMCSPI_R1_IDLE 0x01 +#define MMCSPI_R1_ERASE_RST 0x02 +#define MMCSPI_R1_ILL_CMD 0x04 +#define MMCSPI_R1_CRC_ERR 0x08 +#define MMCSPI_R1_ERASE_ERR 0x10 +#define MMCSPI_R1_ADDR_ERR 0x20 +#define MMCSPI_R1_PARAM_ERR 0x40 + +#define MMCSPI_R1_ERR_MASK (MMCSPI_R1_PARAM_ERR | MMCSPI_R1_ADDR_ERR | \ + MMCSPI_R1_ERASE_ERR | MMCSPI_R1_CRC_ERR | \ + MMCSPI_R1_ILL_CMD) + +#define MMCSPI_R2_LOCKED 0x01 +#define MMCSPI_R2_WP_ER_LCK 0x02 +#define MMCSPI_R2_ERR 0x04 +#define MMCSPI_R2_CC_ERR 0x08 +#define MMCSPI_R2_ECC_FAIL 0x10 +#define MMCSPI_R2_WP_VIOLATE 0x20 +#define MMCSPI_R2_ERASE_PARAM 0x40 +#define MMCSPI_R2_OOR_CSD_OW 0x80 + +/* commands that only apply to the SPI interface */ +#define MMCSPI_READ_OCR 58 +#define MMCSPI_CRC_ON_OFF 59 + +static struct ofw_compat_data compat_data[] = { + { "mmc-spi-slot", 1 }, + { NULL, 0 } +}; + +struct mmcspi_command { + struct mmc_command *mmc_cmd; /* command passed from mmc layer */ + uint32_t opcode; /* possibly translated opcode */ + uint32_t arg; /* possibly translated arg */ + uint32_t flags; /* possibly translated flags */ + uint32_t retries; /* possibly translated retry count */ + struct mmc_data *data; /* possibly redirected data segment */ + unsigned int error_mask; /* R1 errors check mask */ + unsigned char use_crc; /* do crc checking for this command */ + unsigned char rsp_type; /* SPI response type of this command */ +#define MMCSPI_RSP_R1 0 +#define MMCSPI_RSP_R1B 1 +#define MMCSPI_RSP_R2 2 +#define MMCSPI_RSP_R3 3 +#define MMCSPI_RSP_R7 4 + unsigned char rsp_len; /* response len of this command */ + unsigned char mmc_rsp_type; /* MMC reponse type to translate to */ +#define MMCSPI_TO_MMC_RSP_NONE 0 +#define MMCSPI_TO_MMC_RSP_R1 1 +#define MMCSPI_TO_MMC_RSP_R1B 2 +#define MMCSPI_TO_MMC_RSP_R2 3 +#define MMCSPI_TO_MMC_RSP_R3 4 +#define MMCSPI_TO_MMC_RSP_R6 5 +#define MMCSPI_TO_MMC_RSP_R7 6 + struct mmc_data ldata; /* local read data */ +}; + +struct mmcspi_slot { + struct mmcspi_softc *sc; /* back pointer to parent bridge */ + device_t dev; /* mmc device for slot */ + boolean_t bus_busy; /* host has been acquired */ + struct mmc_host host; /* host parameters */ + struct mtx mtx; /* slot mutex */ + uint8_t last_ocr[MMCSPI_OCR_LEN]; /* ocr retrieved after CMD8 */ + uint32_t last_opcode; /* last opcode requested by mmc layer */ + uint32_t last_flags; /* last flags requested by mmc layer */ + unsigned int crc_enabled; /* crc checking is enabled */ + unsigned int crc_init_done; /* whether the initial crc setting has + been sent to the card */ +#define MMCSPI_MAX_LDATA_LEN 16 + uint8_t ldata_buf[MMCSPI_MAX_LDATA_LEN]; +}; + +struct mmcspi_softc { + device_t dev; /* this mmc bridge device */ + device_t busdev; + struct mmcspi_slot slot; + unsigned int use_crc; /* command CRC checking */ +}; + +#if defined(MMCSPI_ENABLE_DEBUG_FUNCS) +static void mmcspi_dump_data(device_t dev, const char *label, uint8_t *data, + unsigned int len); +static void mmcspi_dump_spi_bus(device_t dev, unsigned int len); +#endif + +#define MMCSPI_LOCK_SLOT(_slot) mtx_lock(&(_slot)->mtx) +#define MMCSPI_UNLOCK_SLOT(_slot) mtx_unlock(&(_slot)->mtx) +#define MMCSPI_SLOT_LOCK_INIT(_slot) mtx_init(&(_slot)->mtx, \ + "SD slot mtx", "mmcspi", MTX_DEF) +#define MMCSPI_SLOT_LOCK_DESTROY(_slot) mtx_destroy(&(_slot)->mtx); +#define MMCSPI_ASSERT_SLOT_LOCKED(_slot) mtx_assert(&(_slot)->mtx, \ + MA_OWNED); +#define MMCSPI_ASSERT_SLOT_UNLOCKED(_slot) mtx_assert(&(_slot)->mtx, \ + MA_NOTOWNED); + +#define TRACE_ZONE_ENABLED(zone) (trace_zone_mask & TRACE_ZONE_##zone) + +#define TRACE_ENTER(dev) \ + if (TRACE_ZONE_ENABLED(ENTER)) { \ + device_printf(dev, "%s: enter\n", __func__); \ + } + +#define TRACE_EXIT(dev) \ + if (TRACE_ZONE_ENABLED(EXIT)) { \ + device_printf(dev, "%s: exit\n", __func__); \ + } + +#define TRACE(dev, zone, ...) \ + if (TRACE_ZONE_ENABLED(zone)) { \ + device_printf(dev, __VA_ARGS__); \ + } + +#define TRACE_ZONE_ENTER (1ul << 0) /* function entrance */ +#define TRACE_ZONE_EXIT (1ul << 1) /* function exit */ +#define TRACE_ZONE_ACTION (1ul << 2) /* for narrating major actions taken */ +#define TRACE_ZONE_RESULT (1ul << 3) /* for narrating results of actions */ +#define TRACE_ZONE_ERROR (1ul << 4) /* for reporting errors */ +#define TRACE_ZONE_DATA (1ul << 5) /* for dumping bus data */ +#define TRACE_ZONE_DETAILS (1ul << 6) /* for narrating minor actions/results */ + +#define TRACE_ZONE_NONE 0 +#define TRACE_ZONE_ALL 0xffffffff + +#define CRC7_INITIAL 0x00 +#define CRC16_INITIAL 0x0000 + +SYSCTL_NODE(_hw, OID_AUTO, mmcspi, CTLFLAG_RD, 0, "mmcspi driver"); + +static unsigned int trace_zone_mask = TRACE_ZONE_ERROR; + +static uint8_t crc7tab[256]; +static uint16_t crc16tab[256]; +static uint8_t onesbuf[MMCSPI_DATA_BLOCK_LEN]; /* for driving the tx line + when receiving */ +static uint8_t junkbuf[MMCSPI_DATA_BLOCK_LEN]; /* for receiving data when + transmitting */ + +static uint8_t +update_crc7(uint8_t crc, uint8_t *buf, unsigned int len) +{ + uint8_t tmp; + int i; + + for (i = 0; i < len; i++) { + tmp = (crc << 1) ^ buf[i]; + crc = crc7tab[tmp]; + } + + return (crc); +} + +static uint16_t +update_crc16(uint16_t crc, uint8_t *buf, unsigned int len) +{ + uint16_t tmp, c16; + int i; + + for (i = 0; i < len; i++) { + c16 = 0x00ff & (uint16_t)buf[i]; + + tmp = (crc >> 8) ^ c16; + crc = (crc << 8) ^ crc16tab[tmp]; + } + + return (crc); +} + +static void +init_crc7tab(void) +{ +#define P_CRC7 0x89 + + int i, j; + uint8_t crc, c; + + for (i = 0; i < 256; i++) { + + c = (uint8_t)i; + crc = (c & 0x80) ? c ^ P_CRC7 : c; + + for (j=1; j<8; j++) { + crc = crc << 1; + + if (crc & 0x80) + crc = crc ^ P_CRC7; + } + + crc7tab[i] = crc; + } +} + +static void +init_crc16tab(void) +{ +#define P_CCITT 0x1021 + + int i, j; + uint16_t crc, c; + + for (i = 0; i < 256; i++) { + + crc = 0; + c = ((uint16_t) i) << 8; + + for (j=0; j<8; j++) { + + if ((crc ^ c) & 0x8000) crc = ( crc << 1 ) ^ P_CCITT; + else crc = crc << 1; + + c = c << 1; + } + + crc16tab[i] = crc; + } +} + +static void +mmcspi_slot_init(device_t brdev, struct mmcspi_slot *slot) +{ + struct mmcspi_softc *sc; + + TRACE_ENTER(brdev); + + sc = device_get_softc(brdev); + + slot->sc = sc; + slot->dev = NULL; /* will get real value when card is added */ + slot->bus_busy = false; + slot->host.f_min = 100000; /* this should be as low as we need to go + for any card */ + slot->host.caps = 0; + /* SPI mode requires 3.3V operation */ + slot->host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340; + + MMCSPI_SLOT_LOCK_INIT(slot); + + TRACE_EXIT(brdev); +} + +static void +mmcspi_slot_fini(device_t brdev, struct mmcspi_slot *slot) +{ + TRACE_ENTER(brdev); + + MMCSPI_SLOT_LOCK_DESTROY(slot); + + TRACE_EXIT(brdev); +} + +static void +mmcspi_card_add(struct mmcspi_slot *slot) +{ + device_t brdev; + device_t child; + + brdev = slot->sc->dev; + + TRACE_ENTER(brdev); + + child = device_add_child(brdev, "mmc", DEVICE_UNIT_ANY); + + MMCSPI_LOCK_SLOT(slot); + slot->dev = child; + device_set_ivars(slot->dev, slot); + MMCSPI_UNLOCK_SLOT(slot); + + device_probe_and_attach(slot->dev); + + TRACE_EXIT(brdev); +} + +static void +mmcspi_card_delete(struct mmcspi_slot *slot) +{ + device_t brdev; + device_t dev; + + brdev = slot->sc->dev; + + TRACE_ENTER(brdev); + + MMCSPI_LOCK_SLOT(slot); + dev = slot->dev; + slot->dev = NULL; + MMCSPI_UNLOCK_SLOT(slot); + device_delete_child(brdev, dev); + + TRACE_EXIT(brdev); +} + +static int +mmcspi_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) + return (ENXIO); + + device_set_desc(dev, "MMC SPI mode controller"); + + return (BUS_PROBE_DEFAULT); +} + +static int +mmcspi_attach(device_t dev) +{ + struct mmcspi_softc *sc; + struct sysctl_ctx_list *ctx; + struct sysctl_oid *tree; + struct sysctl_oid_list *child; + + TRACE_ENTER(dev); + + sc = device_get_softc(dev); + ctx = device_get_sysctl_ctx(dev); + tree = device_get_sysctl_tree(dev); + child = SYSCTL_CHILDREN(tree); + + sc->dev = dev; + sc->busdev = device_get_parent(dev); + sc->use_crc = 1; + + SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "use_crc", CTLFLAG_RW, + &sc->use_crc, sizeof(sc->use_crc), "Enable/disable crc checking"); + + SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "trace_mask", CTLFLAG_RW, + &trace_zone_mask, sizeof(trace_zone_mask), "Bitmask for adjusting " + "trace messages"); + + mmcspi_slot_init(dev, &sc->slot); + + /* XXX trigger this from card insert detection */ + mmcspi_card_add(&sc->slot); + + TRACE_EXIT(dev); + + return (0); +} + +static int +mmcspi_detach(device_t dev) +{ + struct mmcspi_softc *sc; + + TRACE_ENTER(dev); + + sc = device_get_softc(dev); + + /* XXX trigger this from card removal detection */ + mmcspi_card_delete(&sc->slot); + + mmcspi_slot_fini(dev, &sc->slot); + + TRACE_EXIT(dev); + + return (0); +} + +static int +mmcspi_suspend(device_t dev) +{ + int err; + + TRACE_ENTER(dev); + err = bus_generic_suspend(dev); + if (err) { + TRACE_EXIT(dev); + return (err); + } + TRACE_EXIT(dev); + + return (0); +} + +static int +mmcspi_resume(device_t dev) +{ + int err; + + TRACE_ENTER(dev); + err = bus_generic_resume(dev); + if (err) { + TRACE_EXIT(dev); + return (err); + } + TRACE_EXIT(dev); + + return (0); +} + +static int +mmcspi_read_ivar(device_t bus, device_t child, int which, uintptr_t *result) +{ + struct mmcspi_slot *slot; + + TRACE_ENTER(bus); + + slot = device_get_ivars(child); + + switch (which) { + case MMCBR_IVAR_BUS_TYPE: + *result = bus_type_spi; + break; + case MMCBR_IVAR_BUS_MODE: + *result = slot->host.ios.bus_mode; + break; + case MMCBR_IVAR_BUS_WIDTH: + *result = slot->host.ios.bus_width; + break; + case MMCBR_IVAR_CHIP_SELECT: + *result = slot->host.ios.chip_select; + break; + case MMCBR_IVAR_CLOCK: + *result = slot->host.ios.clock; + break; + case MMCBR_IVAR_F_MIN: + *result = slot->host.f_min; + break; + case MMCBR_IVAR_F_MAX: + *result = slot->host.f_max; + break; + case MMCBR_IVAR_HOST_OCR: + *result = slot->host.host_ocr; + break; + case MMCBR_IVAR_MODE: + *result = slot->host.mode; + break; + case MMCBR_IVAR_OCR: + *result = slot->host.ocr; + break; + case MMCBR_IVAR_POWER_MODE: + *result = slot->host.ios.power_mode; + break; + case MMCBR_IVAR_VDD: + *result = slot->host.ios.vdd; + break; + case MMCBR_IVAR_VCCQ: + *result = slot->host.ios.vccq; + break; + case MMCBR_IVAR_CAPS: + *result = slot->host.caps; + break; + case MMCBR_IVAR_TIMING: + *result = slot->host.ios.timing; + break; + case MMCBR_IVAR_MAX_DATA: + /* seems reasonable, not dictated by anything */ + *result = 64 * 1024; + break; + default: + return (EINVAL); + } + + TRACE_EXIT(bus); + + return (0); +} + +static int +mmcspi_write_ivar(device_t bus, device_t child, int which, uintptr_t value) +{ + struct mmcspi_slot *slot; + + TRACE_ENTER(bus); + + slot = device_get_ivars(child); + + switch (which) { + default: + return (EINVAL); + case MMCBR_IVAR_BUS_MODE: + slot->host.ios.bus_mode = value; + break; + case MMCBR_IVAR_BUS_WIDTH: + slot->host.ios.bus_width = value; + break; + case MMCBR_IVAR_CLOCK: + slot->host.ios.clock = value; + break; + case MMCBR_IVAR_CHIP_SELECT: + slot->host.ios.chip_select = value; + break; + case MMCBR_IVAR_MODE: + slot->host.mode = value; + break; + case MMCBR_IVAR_OCR: + slot->host.ocr = value; + break; + case MMCBR_IVAR_POWER_MODE: + slot->host.ios.power_mode = value; + break; + case MMCBR_IVAR_VDD: + slot->host.ios.vdd = value; + break; + case MMCBR_IVAR_VCCQ: + slot->host.ios.vccq = value; + break; + case MMCBR_IVAR_TIMING: + slot->host.ios.timing = value; + break; + case MMCBR_IVAR_BUS_TYPE: + case MMCBR_IVAR_CAPS: + case MMCBR_IVAR_HOST_OCR: + case MMCBR_IVAR_F_MIN: + case MMCBR_IVAR_F_MAX: + case MMCBR_IVAR_MAX_DATA: + return (EINVAL); + } + TRACE_EXIT(bus); + + return (0); +} + +static unsigned int +mmcspi_do_spi_read(device_t dev, uint8_t *data, unsigned int len) +{ + struct spi_command spi_cmd; + struct mmcspi_softc *sc; + int err; + + TRACE_ENTER(dev); + + sc = device_get_softc(dev); + + spi_cmd.tx_cmd = onesbuf; + spi_cmd.rx_cmd = data; + spi_cmd.tx_cmd_sz = len; + spi_cmd.rx_cmd_sz = len; + spi_cmd.tx_data = NULL; + spi_cmd.rx_data = NULL; + spi_cmd.tx_data_sz = 0; + spi_cmd.rx_data_sz = 0; + + err = SPIBUS_TRANSFER(sc->busdev, sc->dev, &spi_cmd); + +#ifdef DEBUG_RX + int i; + if (err == 0) { + printf("rx val: "); + for (i = 0; i < len; i++) + printf("%x ", data[i]); + printf("\n"); + } +#endif + + TRACE_EXIT(dev); + + return (err ? MMC_ERR_FAILED : MMC_ERR_NONE); +} + +static unsigned int +mmcspi_do_spi_write(device_t dev, uint8_t *cmd, unsigned int cmdlen, + uint8_t *data, unsigned int datalen) +{ + struct mmcspi_softc *sc; + struct spi_command spi_cmd; + int err; + + TRACE_ENTER(dev); + + sc = device_get_softc(dev); + + spi_cmd.tx_cmd = cmd; + spi_cmd.rx_cmd = junkbuf; + spi_cmd.tx_cmd_sz = cmdlen; + spi_cmd.rx_cmd_sz = cmdlen; + spi_cmd.tx_data = data; + spi_cmd.rx_data = junkbuf; + spi_cmd.tx_data_sz = datalen; + spi_cmd.rx_data_sz = datalen; + + err = SPIBUS_TRANSFER(sc->busdev, sc->dev, &spi_cmd); + + TRACE_EXIT(dev); + + return (err ? MMC_ERR_FAILED : MMC_ERR_NONE); +} + +static unsigned int +mmcspi_wait_for_not_busy(device_t dev) +{ + unsigned int busy_length; + uint8_t pollbuf[MMCSPI_POLL_LEN]; + struct bintime start, elapsed; + unsigned int err; + int i; + + busy_length = 0; + + TRACE_ENTER(dev); + TRACE(dev, ACTION, "waiting for not busy\n"); + + getbintime(&start); + do { + TRACE(dev, DETAILS, "looking for end of busy\n"); + err = mmcspi_do_spi_read(dev, pollbuf, MMCSPI_POLL_LEN); + if (MMC_ERR_NONE != err) { + TRACE(dev, ERROR, "spi read failed\n"); + TRACE_EXIT(dev); + return (err); + } + + for (i = 0; i < MMCSPI_POLL_LEN; i++) { + if (pollbuf[i] != 0x00) { + TRACE(dev, DETAILS, + "end of busy found at %d\n", i); + break; + } + busy_length++; + } + + getbintime(&elapsed); + bintime_sub(&elapsed, &start); + + if (elapsed.sec > MMCSPI_TIMEOUT_SEC) { + TRACE(dev, ERROR, "card busy timeout\n"); + return (MMC_ERR_TIMEOUT); + } + } while (MMCSPI_POLL_LEN == i); + + TRACE(dev, RESULT, "busy for %u byte slots\n", busy_length); + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static int +mmcspi_update_ios(device_t brdev, device_t reqdev) +{ + struct mmcspi_softc *sc; + struct mmcspi_slot *slot; + struct spi_command spi_cmd; + + TRACE_ENTER(brdev); + + sc = device_get_softc(brdev); + slot = device_get_ivars(reqdev); + + if (power_up == slot->host.ios.power_mode) { + /* + * This sequence provides the initialization steps required + * by the spec after card power is applied, but before any + * commands are issued. These operations are harmless if + * applied at any other time (after a warm reset, for + * example). + */ + + /* + * XXX Power-on portion of implementation of card power + * control should go here. Should probably include a power + * off first to ensure card is fully reset from any previous + * state. + */ + + /* + * Make sure power to card has ramped up. The spec requires + * power to ramp up in 35ms or less. + */ + DELAY(35000); + + /* + * Provide at least 74 clocks with CS and MOSI high that the + * spec requires after card power stabilizes. + */ + + spi_cmd.tx_cmd = onesbuf; + spi_cmd.tx_cmd_sz = 10; + spi_cmd.rx_cmd = junkbuf; + spi_cmd.rx_cmd_sz = 10; + spi_cmd.tx_data = NULL; + spi_cmd.rx_data = NULL; + spi_cmd.tx_data_sz = 0; + spi_cmd.rx_data_sz = 0; + + SPIBUS_TRANSFER(sc->busdev, sc->dev, &spi_cmd); + + /* + * Perhaps this was a warm reset and the card is in the + * middle of a long operation. + */ + mmcspi_wait_for_not_busy(brdev); + + slot->last_opcode = 0xffffffff; + slot->last_flags = 0; + memset(slot->last_ocr, 0, MMCSPI_OCR_LEN); + slot->crc_enabled = 0; + slot->crc_init_done = 0; + } + + if (power_off == slot->host.ios.power_mode) { + /* + * XXX Power-off portion of implementation of card power + * control should go here. + */ + } + + TRACE_EXIT(brdev); + + return (0); +} + +static unsigned int +mmcspi_shift_copy(uint8_t *dest, uint8_t *src, unsigned int dest_len, + unsigned int shift) +{ + unsigned int i; + + if (0 == shift) + memcpy(dest, src, dest_len); + else { + for (i = 0; i < dest_len; i++) { + dest[i] = + (src[i] << shift) | + (src[i + 1] >> (8 - shift)); + } + } + + return (dest_len); +} + +static unsigned int +mmcspi_get_response_token(device_t dev, uint8_t mask, uint8_t value, + unsigned int len, unsigned int has_busy, uint8_t *rspbuf) +{ + uint8_t pollbuf[2 * MMCSPI_MAX_RSP_LEN]; + struct bintime start, elapsed; + boolean_t found; + unsigned int err; + unsigned int offset; + unsigned int shift = 0; + unsigned int remaining; + uint16_t search_space; + uint16_t search_mask; + uint16_t search_value; + int i; + + TRACE_ENTER(dev); + + /* + * This loop searches data clocked out of the card for a response + * token matching the given mask and value. It will locate tokens + * that are not byte-aligned, as some cards send non-byte-aligned + * response tokens in some situations. For example, the following + * card consistently sends an unaligned response token to the stop + * command used to terminate multi-block reads: + * + * Transcend 2GB SDSC card, cid: + * mid=0x1b oid=0x534d pnm="00000" prv=1.0 mdt=00.2000 + */ + + offset = 0; + found = false; + getbintime(&start); + do { + TRACE(dev, DETAILS, "looking for response token with " + "mask 0x%02x, value 0x%02x\n", mask, value); + err = mmcspi_do_spi_read(dev, &pollbuf[offset], len); + if (MMC_ERR_NONE != err) { + TRACE(dev, ERROR, "spi read of resp token failed\n"); + TRACE_EXIT(dev); + return (err); + } + + for (i = 0; i < len + offset; i++) { + if ((pollbuf[i] & mask) == value) { + TRACE(dev, DETAILS, "response token found at " + "%d (0x%02x)\n", i, pollbuf[i]); + shift = 0; + found = true; + break; + } else if (i < len + offset - 1) { + /* + * Not the last byte in the buffer, so check + * for a non-aligned response. + */ + search_space = ((uint16_t)pollbuf[i] << 8) | + pollbuf[i + 1]; + search_mask = (uint16_t)mask << 8; + search_value = (uint16_t)value << 8; + + TRACE(dev, DETAILS, "search: space=0x%04x " + " mask=0x%04x val=0x%04x\n", search_space, + search_mask, search_value); + + for (shift = 1; shift < 8; shift++) { + search_space <<= 1; + if ((search_space & search_mask) == + search_value) { + found = true; + TRACE(dev, DETAILS, "Found mat" + "ch at shift %u\n", shift); + break; + } + } + + if (shift < 8) + break; + } else { + /* + * Move the last byte to the first position + * and go 'round again. + */ + pollbuf[0] = pollbuf[i]; + } + } + + if (!found) { + offset = 1; + + getbintime(&elapsed); + bintime_sub(&elapsed, &start); + + if (elapsed.sec > MMCSPI_TIMEOUT_SEC) { + TRACE(dev, ERROR, "timeout while looking for " + "response token\n"); + return (MMC_ERR_TIMEOUT); + } + } + } while (!found); + + /* + * Note that if i == 0 and offset == 1, shift is always greater than + * zero. + */ + remaining = i - offset + (shift ? 1 : 0); + + TRACE(dev, DETAILS, "len=%u i=%u rem=%u shift=%u\n", + len, i, remaining, shift); + + if (remaining) { + err = mmcspi_do_spi_read(dev, &pollbuf[len + offset], + remaining); + if (MMC_ERR_NONE != err) { + TRACE(dev, ERROR, "spi read of remainder of response " + "token failed\n"); + TRACE_EXIT(dev); + return (err); + } + } + + mmcspi_shift_copy(rspbuf, &pollbuf[i], len, shift); + + if (TRACE_ZONE_ENABLED(RESULT)) { + TRACE(dev, RESULT, "response ="); + for (i = 0; i < len; i++) + printf(" 0x%02x", rspbuf[i]); + printf("\n"); + } + + if (has_busy) { + err = mmcspi_wait_for_not_busy(dev); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + } + + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_set_up_command(device_t dev, struct mmcspi_command *mmcspi_cmd, + struct mmc_command *mmc_cmd) +{ + struct mmcspi_softc *sc; + struct mmcspi_slot *slot; + uint32_t opcode; + uint32_t arg; + uint32_t flags; + uint32_t retries; + unsigned char rsp_type; + unsigned char rsp_len; + unsigned char mmc_rsp_type; + unsigned int ldata_len = 0; + unsigned int use_crc; + + sc = device_get_softc(dev); + slot = &sc->slot; + use_crc = slot->crc_enabled; + + opcode = mmc_cmd->opcode; + arg = mmc_cmd->arg; + flags = mmc_cmd->flags; + retries = mmc_cmd->retries; + + if (flags & MMC_CMD_IS_APP) { + switch (opcode) { + case ACMD_SD_STATUS: + rsp_type = MMCSPI_RSP_R2; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R1; + break; + case ACMD_SEND_NUM_WR_BLOCKS: + case ACMD_SET_WR_BLK_ERASE_COUNT: + case ACMD_SET_CLR_CARD_DETECT: + case ACMD_SEND_SCR: + rsp_type = MMCSPI_RSP_R1; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R1; + break; + case ACMD_SD_SEND_OP_COND: + /* only HCS bit is valid in spi mode */ + arg &= 0x40000000; + rsp_type = MMCSPI_RSP_R1; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R3; + break; + default: + TRACE(dev, ERROR, "Invalid app command opcode %u\n", + opcode); + return (MMC_ERR_INVALID); + } + } else { + switch (opcode) { + case MMC_GO_IDLE_STATE: + use_crc = 1; + rsp_type = MMCSPI_RSP_R1; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_NONE; + break; + + case MMC_SEND_OP_COND: + case MMC_SWITCH_FUNC: /* also SD_SWITCH_FUNC */ + case MMC_SET_BLOCKLEN: + case MMC_READ_SINGLE_BLOCK: + case MMC_READ_MULTIPLE_BLOCK: + case MMC_WRITE_BLOCK: + case MMC_WRITE_MULTIPLE_BLOCK: + case MMC_PROGRAM_CSD: + case MMC_SEND_WRITE_PROT: + case SD_ERASE_WR_BLK_START: + case SD_ERASE_WR_BLK_END: + case MMC_LOCK_UNLOCK: + case MMC_GEN_CMD: + rsp_type = MMCSPI_RSP_R1; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R1; + break; + case MMCSPI_CRC_ON_OFF: + rsp_type = MMCSPI_RSP_R1; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_NONE; + break; + + case MMC_SEND_CSD: + case MMC_SEND_CID: + arg = 0; /* no rca in spi mode */ + rsp_type = MMCSPI_RSP_R1; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R2; + ldata_len = 16; + break; + + case MMC_APP_CMD: + arg = 0; /* no rca in spi mode */ + rsp_type = MMCSPI_RSP_R1; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R1; + break; + + case MMC_STOP_TRANSMISSION: + case MMC_SET_WRITE_PROT: + case MMC_CLR_WRITE_PROT: + case MMC_ERASE: + rsp_type = MMCSPI_RSP_R1B; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R1B; + break; + + case MMC_ALL_SEND_CID: + /* handle MMC_ALL_SEND_CID as MMC_SEND_CID */ + opcode = MMC_SEND_CID; + rsp_type = MMCSPI_RSP_R1; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R2; + ldata_len = 16; + break; + + case MMC_SEND_STATUS: + arg = 0; /* no rca in spi mode */ + rsp_type = MMCSPI_RSP_R2; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R1; + break; + + + case MMCSPI_READ_OCR: + rsp_type = MMCSPI_RSP_R3; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_NONE; + break; + + case SD_SEND_RELATIVE_ADDR: + /* + * Handle SD_SEND_RELATIVE_ADDR as MMC_SEND_STATUS - + * the rca returned to the caller will always be 0. + */ + opcode = MMC_SEND_STATUS; + rsp_type = MMCSPI_RSP_R2; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R6; + break; + + case SD_SEND_IF_COND: + use_crc = 1; + rsp_type = MMCSPI_RSP_R7; + mmc_rsp_type = MMCSPI_TO_MMC_RSP_R7; + break; + + default: + TRACE(dev, ERROR, "Invalid cmd opcode %u\n", opcode); + return (MMC_ERR_INVALID); + } + } + + switch (rsp_type) { + case MMCSPI_RSP_R1: + case MMCSPI_RSP_R1B: + rsp_len = 1; + break; + case MMCSPI_RSP_R2: + rsp_len = 2; + break; + case MMCSPI_RSP_R3: + case MMCSPI_RSP_R7: + rsp_len = 5; + break; + default: + TRACE(dev, ERROR, "Unknown response type %u\n", rsp_type); + return (MMC_ERR_INVALID); + } + + mmcspi_cmd->mmc_cmd = mmc_cmd; + mmcspi_cmd->opcode = opcode; + mmcspi_cmd->arg = arg; + mmcspi_cmd->flags = flags; + mmcspi_cmd->retries = retries; + mmcspi_cmd->use_crc = use_crc; + mmcspi_cmd->error_mask = MMCSPI_R1_ERR_MASK; + if (!mmcspi_cmd->use_crc) + mmcspi_cmd->error_mask &= ~MMCSPI_R1_CRC_ERR; + mmcspi_cmd->rsp_type = rsp_type; + mmcspi_cmd->rsp_len = rsp_len; + mmcspi_cmd->mmc_rsp_type = mmc_rsp_type; + + memset(&mmcspi_cmd->ldata, 0, sizeof(struct mmc_data)); + mmcspi_cmd->ldata.len = ldata_len; + if (ldata_len) { + mmcspi_cmd->ldata.data = sc->slot.ldata_buf; + mmcspi_cmd->ldata.flags = MMC_DATA_READ; + + mmcspi_cmd->data = &mmcspi_cmd->ldata; + } else + mmcspi_cmd->data = mmc_cmd->data; + + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_send_cmd(device_t dev, struct mmcspi_command *cmd, uint8_t *rspbuf) +{ + unsigned int err; + uint32_t opcode; + uint32_t arg; + uint8_t txbuf[8]; + uint8_t crc; + + TRACE_ENTER(dev); + + opcode = cmd->opcode; + arg = cmd->arg; + + TRACE(dev, ACTION, "sending %sMD%u(0x%08x)\n", + cmd->flags & MMC_CMD_IS_APP ? "AC": "C", opcode, arg); + + /* + * Sending this byte ahead of each command prevents some cards from + * responding with unaligned data, and doesn't bother the others. + * Examples: + * + * Sandisk 32GB SDHC card, cid: + * mid=0x03 oid=0x5344 pnm="SU32G" prv=8.0 mdt=00.2000 + */ + txbuf[0] = 0xff; + + txbuf[1] = 0x40 | (opcode & 0x3f); + txbuf[2] = arg >> 24; + txbuf[3] = (arg >> 16) & 0xff; + txbuf[4] = (arg >> 8) & 0xff; + txbuf[5] = arg & 0xff; + + if (cmd->use_crc) + crc = update_crc7(CRC7_INITIAL, &txbuf[1], 5); + else + crc = 0; + + txbuf[6] = (crc << 1) | 0x01; + + /* + * Some cards have garbage on the bus in the first byte slot after + * the last command byte. This seems to be common with the stop + * command. Clocking out an extra byte with the command will + * result in that data not being searched for the response token, + * which is ok, because no cards respond that fast. + */ + txbuf[7] = 0xff; + + err = mmcspi_do_spi_write(dev, txbuf, sizeof(txbuf), NULL, 0); + if (MMC_ERR_NONE != err) { + TRACE(dev, ERROR, "spi write of command failed\n"); + TRACE_EXIT(dev); + return (err); + } + + TRACE(dev, DETAILS, + "rx cmd bytes 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n", + junkbuf[0], junkbuf[1], junkbuf[2], junkbuf[3], junkbuf[4], + junkbuf[5] ); + TRACE(dev, DETAILS, "skipped response byte is 0x%02x\n", junkbuf[6]); + + err = mmcspi_get_response_token(dev, MMCSPI_R1_MASK, MMCSPI_R1_VALUE, + cmd->rsp_len, MMCSPI_RSP_R1B == cmd->rsp_type, rspbuf); + + if (MMC_ERR_NONE == err) { + if (rspbuf[0] & cmd->error_mask & MMCSPI_R1_CRC_ERR) + err = MMC_ERR_BADCRC; + else if (rspbuf[0] & cmd->error_mask) + err = MMC_ERR_INVALID; + } + + TRACE_EXIT(dev); + + return (err); +} + +static unsigned int +mmcspi_read_block(device_t dev, uint8_t *data, unsigned int len, + unsigned int check_crc16, unsigned int check_crc7) +{ + struct bintime start; + struct bintime elapsed; + unsigned int non_token_bytes; + unsigned int data_captured; + unsigned int crc_captured; + unsigned int pollbufpos; + unsigned int crc16_mismatch; + unsigned int err; + uint16_t crc16, computed_crc16; + uint8_t crc7, computed_crc7; + uint8_t pollbuf[MMCSPI_POLL_LEN]; + uint8_t crcbuf[MMCSPI_DATA_CRC_LEN]; + int i; + + crc16_mismatch = 0; + + TRACE_ENTER(dev); + TRACE(dev, ACTION, "read block(%u)\n", len); + + /* + * With this approach, we could pointlessly read up to + * (MMCSPI_POLL_LEN - 3 - len) bytes from the spi bus, but only in + * the odd situation where MMCSPI_POLL_LEN is greater than len + 3. + */ + getbintime(&start); + do { + TRACE(dev, DETAILS, "looking for read token\n"); + err = mmcspi_do_spi_read(dev, pollbuf, MMCSPI_POLL_LEN); + if (MMC_ERR_NONE != err) { + TRACE(dev, ERROR, "token read on spi failed\n"); + TRACE_EXIT(dev); + return (err); + } + + for (i = 0; i < MMCSPI_POLL_LEN; i++) { + if (MMCSPI_TOKEN_SB == pollbuf[i]) { + TRACE(dev, RESULT, + "found start block token at %d\n", i); + break; + } else if (MMCSPI_IS_DE_TOKEN(pollbuf[i])) { + TRACE(dev, ERROR, + "found data error token at %d\n", i); + TRACE_EXIT(dev); + return (MMC_ERR_FAILED); + } + } + + getbintime(&elapsed); + bintime_sub(&elapsed, &start); + + if (elapsed.sec > MMCSPI_TIMEOUT_SEC) { + TRACE(dev, ERROR, "timeout while looking for read " + "token\n"); + return (MMC_ERR_TIMEOUT); + } + } while (MMCSPI_POLL_LEN == i); + + /* copy any data captured in tail of poll buf to data buf */ + non_token_bytes = MMCSPI_POLL_LEN - i - 1; + data_captured = min(non_token_bytes, len); + crc_captured = non_token_bytes - data_captured; + pollbufpos = i + 1; + + TRACE(dev, DETAILS, "data bytes captured in pollbuf = %u\n", + data_captured); + + memcpy(data, &pollbuf[pollbufpos], data_captured); + pollbufpos += data_captured; + + TRACE(dev, DETAILS, "data bytes to read = %u, crc_captured = %u\n", + len - data_captured, crc_captured); + + /* get any remaining data from the spi bus */ + if (data_captured < len) { + err = mmcspi_do_spi_read(dev, &data[data_captured], + len - data_captured); + if (MMC_ERR_NONE != err) { + TRACE(dev, ERROR, + "spi read of remainder of block failed\n"); + TRACE_EXIT(dev); + return (err); + } + } + + /* copy any crc captured in the poll buf to the crc buf */ + memcpy(crcbuf, &pollbuf[pollbufpos], crc_captured); + + /* get any remaining crc */ + if (crc_captured < MMCSPI_DATA_CRC_LEN) { + TRACE(dev, DETAILS, "crc bytes to read = %u\n", + MMCSPI_DATA_CRC_LEN - crc_captured); + + err = mmcspi_do_spi_read(dev, &crcbuf[crc_captured], + MMCSPI_DATA_CRC_LEN - crc_captured); + if (MMC_ERR_NONE != err) { + TRACE(dev, ERROR, "spi read of crc failed\n"); + TRACE_EXIT(dev); + return (err); + } + } + + /* + * The following crc checking code is deliberately structured to + * allow a passing crc-7 check to override a failing crc-16 check + * when both are enabled. + */ + if (check_crc16) { + crc16 = ((uint16_t)crcbuf[0] << 8) | crcbuf[1]; + computed_crc16 = update_crc16(CRC16_INITIAL, data, len); + TRACE(dev, RESULT, "sent_crc16=0x%04x computed_crc16=0x%04x\n", + crc16, computed_crc16); + + if (computed_crc16 != crc16) { + crc16_mismatch = 1; + + TRACE(dev, ERROR, "crc16 mismatch, should be 0x%04x, " + " is 0x%04x\n", crc16, computed_crc16); + + if (!check_crc7) { + TRACE_EXIT(dev); + return (MMC_ERR_BADCRC); + } + } + } + + if (check_crc7) { + if (crc16_mismatch) { + /* + * Let the user know something else is being checked + * after announcing an error above. + */ + TRACE(dev, ERROR, "checking crc7\n"); + } + + crc7 = data[len - 1] >> 1; + computed_crc7 = update_crc7(CRC7_INITIAL, data, len - 1); + TRACE(dev, RESULT, "sent_crc7=0x%02x computed_crc7=0x%02x\n", + crc7, computed_crc7); + + if (computed_crc7 != crc7) { + TRACE(dev, ERROR, + "crc7 mismatch, should be 0x%02x, is 0x%02x\n", + crc7, computed_crc7); + + TRACE_EXIT(dev); + return (MMC_ERR_BADCRC); + } + } + + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_send_stop(device_t dev, unsigned int retries) +{ + struct mmcspi_command stop; + struct mmc_command mmc_stop; + uint8_t stop_response; + unsigned int err; + int i; + + TRACE_ENTER(dev); + + memset(&mmc_stop, 0, sizeof(mmc_stop)); + mmc_stop.opcode = MMC_STOP_TRANSMISSION; + mmc_stop.flags = MMC_RSP_R1B | MMC_CMD_AC; + + err = mmcspi_set_up_command(dev, &stop, &mmc_stop); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + /* + * Retry stop commands that fail due to bad crc here because having + * the caller retry the entire read/write command due to such a + * failure is pointlessly expensive. + */ + for (i = 0; i <= retries; i++) { + TRACE(dev, ACTION, "sending stop message\n"); + + err = mmcspi_send_cmd(dev, &stop, &stop_response); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + TRACE(dev, RESULT, "stop response=0x%02x\n", stop_response); + + /* retry on crc error */ + if (stop_response & stop.error_mask & MMCSPI_R1_CRC_ERR) { + continue; + } + } + + if (stop_response & stop.error_mask) { + TRACE_EXIT(dev); + + /* + * Don't return MMC_ERR_BADCRC here, even if + * MMCSPI_R1_CRC_ERR is set, because that would trigger the + * caller's retry-on-crc-error mechanism, effectively + * squaring the maximum number of retries of the stop + * command. + */ + return (MMC_ERR_FAILED); + } + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_read_phase(device_t dev, struct mmcspi_command *cmd) +{ + struct mmc_data *data; + unsigned int data_offset; + unsigned int num_blocks; + unsigned int len; + unsigned int err; + uint8_t *data8; + int i; + + TRACE_ENTER(dev); + + data = cmd->data; + data8 = (uint8_t *)data->data; + data_offset = 0; + + if (data->len < MMCSPI_DATA_BLOCK_LEN) { + num_blocks = 1; + len = data->len; + } else { + num_blocks = data->len / MMCSPI_DATA_BLOCK_LEN; + len = MMCSPI_DATA_BLOCK_LEN; + } + + for (i = 0; i < num_blocks; i++) { + /* + * The CID and CSD data blocks contain both a trailing crc-7 + * inside the data block and the standard crc-16 following + * the data block, so both are checked when use_crc is true. + * + * When crc checking has been enabled via CMD59, some cards + * send CID and CSD data blocks with correct crc-7 values + * but incorrect crc-16 values. read_block will accept + * those responses as valid as long as the crc-7 is correct. + * + * Examples: + * + * Super Talent 1GB SDSC card, cid: + * mid=0x1b oid=0x534d pnm="00000" prv=1.0 mdt=02.2010 + */ + err = mmcspi_read_block(dev, &data8[data_offset], len, + cmd->use_crc, cmd->use_crc && ((MMC_SEND_CID == cmd->opcode) + || (MMC_SEND_CSD == cmd->opcode))); + + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + data_offset += MMCSPI_DATA_BLOCK_LEN; + } + + /* multi-block read commands require a stop */ + if (num_blocks > 1) { + err = mmcspi_send_stop(dev, cmd->retries); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + } + + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_write_block(device_t dev, uint8_t *data, unsigned int is_multi, + unsigned char use_crc, uint8_t *status) +{ + uint8_t txbuf[max(MMCSPI_POLL_LEN, 2)]; + uint8_t response_token; + unsigned int err; + uint16_t crc; + + TRACE_ENTER(dev); + + if (use_crc) + crc = update_crc16(CRC16_INITIAL, data, MMCSPI_DATA_BLOCK_LEN); + else + crc = 0; + + TRACE(dev, ACTION, "write block(512) crc=0x%04x\n", crc); + + txbuf[0] = is_multi ? MMCSPI_TOKEN_SB_WM : MMCSPI_TOKEN_SB; + err = mmcspi_do_spi_write(dev, txbuf, 1, data, MMCSPI_DATA_BLOCK_LEN); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + txbuf[0] = crc >> 8; + txbuf[1] = crc & 0xff; + err = mmcspi_do_spi_write(dev, txbuf, 2, NULL, 0); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + err = mmcspi_get_response_token(dev, MMCSPI_DR_MASK, MMCSPI_DR_VALUE, + 1, 1, &response_token); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + *status = response_token & MMCSPI_DR_ERR_MASK; + + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_write_phase(device_t dev, struct mmcspi_command *cmd) +{ + + struct mmc_data *data; + unsigned int data_offset; + unsigned int num_blocks; + unsigned int err; + uint8_t *data8; + uint8_t token[2]; + uint8_t status; + int i; + + TRACE_ENTER(dev); + + data = cmd->data; + + data8 = (uint8_t *)data->data; + data_offset = 0; + num_blocks = data->len / MMCSPI_DATA_BLOCK_LEN; + for (i = 0; i < num_blocks; i++) { + err = mmcspi_write_block(dev, &data8[data_offset], + num_blocks > 1, cmd->use_crc, &status); + + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + if (MMCSPI_DR_ERR_NONE != status) { + if (num_blocks > 1) { + /* + * Ignore any failure reported for the stop + * command, as the return status for the + * write phase will be whatever error was + * indicated in the data respone token. + */ + mmcspi_send_stop(dev, cmd->retries); + } + + /* + * A CRC error can't be ignored here, even if crc + * use is disabled, as there is no way to simply + * carry on when a data error token has been sent. + */ + if (MMCSPI_DR_ERR_CRC == status) { + TRACE_EXIT(dev); + return (MMC_ERR_BADCRC); + } else { + TRACE_EXIT(dev); + return (MMC_ERR_FAILED); + } + } + + data_offset += MMCSPI_DATA_BLOCK_LEN; + } + + /* successful multi-block write commands require a stop token */ + if (num_blocks > 1) { + TRACE(dev, ACTION, "Sending stop token\n"); + + /* + * Most/all cards are a bit sluggish in assserting busy + * after receipt of the STOP_TRAN token. Clocking out an + * extra byte here provides a byte of dead time before + * looking for not busy, avoiding a premature not-busy + * determination with such cards. + */ + token[0] = MMCSPI_TOKEN_ST; + token[1] = 0xff; + + err = mmcspi_do_spi_write(dev, token, sizeof(token), NULL, 0); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + err = mmcspi_wait_for_not_busy(dev); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + } + + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_translate_response(device_t dev, struct mmcspi_command *cmd, + uint8_t *rspbuf) +{ + struct mmc_command *mmc_cmd; + uint32_t mmc_rsp_type; + uint8_t *ldata; + + mmc_cmd = cmd->mmc_cmd; + mmc_rsp_type = cmd->mmc_rsp_type; + ldata = cmd->ldata.data; + + TRACE_ENTER(dev); + + TRACE(dev, ACTION, "translating SPI rsp %u to SD rsp %u\n", + cmd->rsp_type, mmc_rsp_type); + + if ((MMCSPI_TO_MMC_RSP_R1 == mmc_rsp_type) || + (MMCSPI_TO_MMC_RSP_R1B == mmc_rsp_type)) { + + TRACE(dev, ACTION, "translating SPI-R1/2 to SD-R1\n"); + + if ((MMCSPI_RSP_R1 == cmd->rsp_type) || + (MMCSPI_RSP_R1B == cmd->rsp_type) || + (MMCSPI_RSP_R2 == cmd->rsp_type)) { + mmc_cmd->resp[0] = 0; + + if (rspbuf[0] & MMCSPI_R1_PARAM_ERR) + mmc_cmd->resp[0] |= R1_OUT_OF_RANGE; + + if (rspbuf[0] & MMCSPI_R1_ADDR_ERR) + mmc_cmd->resp[0] |= R1_ADDRESS_ERROR; + + if (rspbuf[0] & MMCSPI_R1_ERASE_ERR) + mmc_cmd->resp[0] |= R1_ERASE_SEQ_ERROR; + + if (rspbuf[0] & MMCSPI_R1_CRC_ERR) + mmc_cmd->resp[0] |= R1_COM_CRC_ERROR; + + if (rspbuf[0] & MMCSPI_R1_ILL_CMD) + mmc_cmd->resp[0] |= R1_ILLEGAL_COMMAND; + + if (rspbuf[0] & MMCSPI_R1_ERASE_RST) + mmc_cmd->resp[0] |= R1_ERASE_RESET; + + if (rspbuf[0] & MMCSPI_R1_IDLE) + mmc_cmd->resp[0] |= + (uint32_t)R1_STATE_IDLE << 9; + else + mmc_cmd->resp[0] |= + (uint32_t)R1_STATE_READY << 9; + + /* When MMC_CMD_IS_APP is sent, emulate R1_APP_CMD + SD-bus status bit. */ + if (!(cmd->flags & MMC_CMD_IS_APP) && + (MMC_APP_CMD == cmd->opcode)) + mmc_cmd->resp[0] |= R1_APP_CMD; + + if (MMCSPI_RSP_R2 == cmd->rsp_type) { + if (rspbuf[1] & MMCSPI_R2_OOR_CSD_OW) + mmc_cmd->resp[0] |= + R1_OUT_OF_RANGE | + R1_CSD_OVERWRITE; + + if (rspbuf[1] & MMCSPI_R2_ERASE_PARAM) + mmc_cmd->resp[0] |= R1_ERASE_PARAM; + + if (rspbuf[1] & MMCSPI_R2_WP_VIOLATE) + mmc_cmd->resp[0] |= R1_WP_VIOLATION; + + if (rspbuf[1] & MMCSPI_R2_ECC_FAIL) + mmc_cmd->resp[0] |= R1_CARD_ECC_FAILED; + + if (rspbuf[1] & MMCSPI_R2_CC_ERR) + mmc_cmd->resp[0] |= R1_CC_ERROR; + + if (rspbuf[1] & MMCSPI_R2_ERR) + mmc_cmd->resp[0] |= R1_ERROR; + + if (rspbuf[1] & MMCSPI_R2_WP_ER_LCK) + mmc_cmd->resp[0] |= + R1_LOCK_UNLOCK_FAILED | + R1_WP_ERASE_SKIP; + + if (rspbuf[1] & MMCSPI_R2_LOCKED) + mmc_cmd->resp[0] |= R1_CARD_IS_LOCKED; + + } + } else + return (MMC_ERR_INVALID); + + } else if (MMCSPI_TO_MMC_RSP_R2 == mmc_rsp_type) { + + if (16 == cmd->ldata.len) { + + TRACE(dev, ACTION, "translating SPI-R1/ldata(16) " + "to SD-R2\n"); + + /* ldata contains bits 127:0 of the spi response */ + + mmc_cmd->resp[0] = + (uint32_t)ldata[0] << 24 | + (uint32_t)ldata[1] << 16 | + (uint32_t)ldata[2] << 8 | + (uint32_t)ldata[3]; + + mmc_cmd->resp[1] = + (uint32_t)ldata[4] << 24 | + (uint32_t)ldata[5] << 16 | + (uint32_t)ldata[6] << 8 | + (uint32_t)ldata[7]; + + mmc_cmd->resp[2] = + (uint32_t)ldata[8] << 24 | + (uint32_t)ldata[9] << 16 | + (uint32_t)ldata[10] << 8 | + (uint32_t)ldata[11]; + + mmc_cmd->resp[3] = + (uint32_t)ldata[12] << 24 | + (uint32_t)ldata[13] << 16 | + (uint32_t)ldata[14] << 8; + + } else + return (MMC_ERR_INVALID); + + } else if (MMCSPI_TO_MMC_RSP_R3 == mmc_rsp_type) { + + if (MMCSPI_RSP_R3 == cmd->rsp_type) { + + TRACE(dev, ACTION, "translating SPI-R3 to SD-R3\n"); + + /* rspbuf contains a 40-bit spi-R3 from the + MMCSPI_READ_OCR response, of which bits 31:0 are + the OCR value */ + + /* spi response bits 31:0 mapped to + sdhc register bits 31:0 */ + mmc_cmd->resp[0] = + (uint32_t)rspbuf[1] << 24 | + (uint32_t)rspbuf[2] << 16 | + (uint32_t)rspbuf[3] << 8 | + (uint32_t)rspbuf[4]; + + /* Clear card busy bit (indicating busy) if the + SPI-R1 idle bit is set. */ + if (rspbuf[0] & MMCSPI_R1_IDLE) { + mmc_cmd->resp[0] &= ~MMC_OCR_CARD_BUSY; + } else { + mmc_cmd->resp[0] |= MMC_OCR_CARD_BUSY; + } + + TRACE(dev, DETAILS, "ocr=0x%08x\n", mmc_cmd->resp[0]); + } else + return (MMC_ERR_INVALID); + + } else if (MMCSPI_TO_MMC_RSP_R6 == mmc_rsp_type) { + if (MMCSPI_RSP_R2 == cmd->rsp_type) { + + TRACE(dev, ACTION, "translating SPI-R2 to SD-R6\n"); + + /* rca returned will always be zero */ + mmc_cmd->resp[0] = 0; + + if (rspbuf[0] & MMCSPI_R1_CRC_ERR) + mmc_cmd->resp[0] |= 0x8000; + + if (rspbuf[0] & MMCSPI_R1_ILL_CMD) + mmc_cmd->resp[0] |= 0x4000; + + if (rspbuf[1] & MMCSPI_R2_ERR) + mmc_cmd->resp[0] |= 0x2000; + + if (rspbuf[0] & MMCSPI_R1_IDLE) + mmc_cmd->resp[0] |= + (uint32_t)R1_STATE_IDLE << 9; + else + mmc_cmd->resp[0] |= + (uint32_t)R1_STATE_READY << 9; + } else + return (MMC_ERR_INVALID); + + } else if (MMCSPI_TO_MMC_RSP_R7 == mmc_rsp_type) { + if (MMCSPI_RSP_R7 == cmd->rsp_type) { + + TRACE(dev, ACTION, "translating SPI-R7 to SD-R7\n"); + + /* rsp buf contains a 40-bit spi-R7, of which bits + 11:0 need to be transferred */ + + /* spi response bits 11:0 mapped to + sdhc register bits 11:0 */ + mmc_cmd->resp[0] = + (uint32_t)(rspbuf[3] & 0xf) << 8 | + (uint32_t)rspbuf[4]; + } else + return (MMC_ERR_INVALID); + + } else if (MMCSPI_TO_MMC_RSP_NONE != mmc_rsp_type) + return (MMC_ERR_INVALID); + + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_get_ocr(device_t dev, uint8_t *ocrbuf) +{ + struct mmc_command mmc_cmd; + struct mmcspi_command cmd; + unsigned int err; + uint8_t r1_status; + uint8_t rspbuf[MMCSPI_MAX_RSP_LEN]; + + TRACE_ENTER(dev); + + memset(&mmc_cmd, 0, sizeof(struct mmc_command)); + mmc_cmd.opcode = MMCSPI_READ_OCR; + mmc_cmd.flags = MMC_RSP_R3 | MMC_CMD_AC; + + err = mmcspi_set_up_command(dev, &cmd, &mmc_cmd); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + err = mmcspi_send_cmd(dev, &cmd, rspbuf); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + r1_status = rspbuf[0] & cmd.error_mask; + if (r1_status) { + if (r1_status & MMCSPI_R1_CRC_ERR) + err = MMC_ERR_BADCRC; + else + err = MMC_ERR_INVALID; + + TRACE_EXIT(dev); + return (err); + } + + memcpy(ocrbuf, &rspbuf[1], MMCSPI_OCR_LEN); + + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_set_crc_on_off(device_t dev, unsigned int crc_on) +{ + struct mmc_command mmc_cmd; + struct mmcspi_command cmd; + unsigned int err; + uint8_t r1_status; + uint8_t rspbuf[MMCSPI_MAX_RSP_LEN]; + + TRACE_ENTER(dev); + + memset(&mmc_cmd, 0, sizeof(struct mmc_command)); + mmc_cmd.opcode = MMCSPI_CRC_ON_OFF; + mmc_cmd.arg = crc_on ? 1 : 0; + mmc_cmd.flags = MMC_RSP_NONE | MMC_CMD_AC; + + err = mmcspi_set_up_command(dev, &cmd, &mmc_cmd); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + err = mmcspi_send_cmd(dev, &cmd, rspbuf); + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + r1_status = rspbuf[0] & cmd.error_mask; + if (r1_status) { + if (r1_status & MMCSPI_R1_CRC_ERR) + err = MMC_ERR_BADCRC; + else + err = MMC_ERR_INVALID; + + TRACE_EXIT(dev); + return (err); + } + + TRACE_EXIT(dev); + return (MMC_ERR_NONE); +} + +static unsigned int +mmcspi_update_crc_setting(device_t dev, unsigned int crc_on) +{ + struct mmcspi_softc *sc; + struct mmcspi_slot *slot; + unsigned int err; + int i; + + TRACE_ENTER(dev); + + sc = device_get_softc(dev); + slot = &sc->slot; + + for (i = 0; i <= MMCSPI_RETRIES; i++) { + err = mmcspi_set_crc_on_off(dev, crc_on); + if (MMC_ERR_BADCRC != err) + break; + } + + if (MMC_ERR_NONE != err) { + TRACE_EXIT(dev); + return (err); + } + + if (crc_on) + slot->crc_enabled = 1; + else + slot->crc_enabled = 0; + + TRACE_EXIT(dev); + + return (MMC_ERR_NONE); +} + +static int +mmcspi_request(device_t brdev, device_t reqdev, struct mmc_request *req) +{ + TRACE_ENTER(brdev); + + struct mmcspi_softc *sc = device_get_softc(brdev); + struct mmcspi_slot *slot = &sc->slot; + struct mmcspi_command cmd; + struct mmc_command *mmc_cmd = req->cmd; + struct mmc_data *data; + unsigned int err; + unsigned int use_crc_sample; + int i, j; + uint32_t opcode; + uint32_t flags; + uint32_t last_opcode; + uint32_t last_flags; + uint8_t rspbuf[MMCSPI_MAX_RSP_LEN]; + +#define IS_CMD(code, cmd, flags) \ + (!((flags) & MMC_CMD_IS_APP) && ((code) == (cmd))) +#define IS_ACMD(code, cmd, flags) \ + (((flags) & MMC_CMD_IS_APP) && ((code) == (cmd))) + + if (power_on != slot->host.ios.power_mode) + return (MMC_ERR_INVALID); + + /* + * Sample use_crc sysctl and adjust card setting if required and + * appropriate. + */ + use_crc_sample = sc->use_crc; + if (slot->crc_init_done && + (use_crc_sample != slot->crc_enabled)) { + err = mmcspi_update_crc_setting(brdev, use_crc_sample); + if (MMC_ERR_NONE != err) + goto out; + slot->crc_init_done = 1; + } + + err = mmcspi_set_up_command(brdev, &cmd, mmc_cmd); + if (MMC_ERR_NONE != err) + goto out; + + opcode = cmd.opcode; + flags = cmd.flags; + data = cmd.data; + + last_opcode = slot->last_opcode; + last_flags = slot->last_flags; + + /* enforce restrictions on request parameters */ + if (data) { + /* + * All writes must be a multiple of the block length. All + * reads greater than the block length must be a multiple of + * the block length. + */ + if ((data->len % MMCSPI_DATA_BLOCK_LEN) && + !((data->flags & MMC_DATA_READ) && + (data->len < MMCSPI_DATA_BLOCK_LEN))) { + TRACE(brdev, ERROR, + "requested data phase not a multiple of %u\n", + MMCSPI_DATA_BLOCK_LEN); + err = MMC_ERR_INVALID; + goto out; + } + + if (((data->flags & MMC_DATA_READ) && + (data->flags & MMC_DATA_WRITE)) || + (data->flags & MMC_DATA_STREAM)) { + TRACE(brdev, ERROR, "illegal data phase flags 0x%02x\n", + data->flags); + err = MMC_ERR_INVALID; + goto out; + } + } + + for (i = 0; i <= cmd.retries; i++) { + /* + * On the next command following a CMD8, collect the OCR and + * save it off for use in the next ACMD41. + */ + if (IS_CMD(SD_SEND_IF_COND, last_opcode, last_flags)) { + err = mmcspi_get_ocr(brdev, slot->last_ocr); + if (MMC_ERR_NONE != err) { + if (MMC_ERR_BADCRC == err) + continue; + goto out; + } + } + + err = mmcspi_send_cmd(brdev, &cmd, rspbuf); + if (MMC_ERR_NONE != err) { + if (MMC_ERR_BADCRC == err) + continue; + goto out; + } + + if (data) { + if (data->flags & MMC_DATA_READ) + err = mmcspi_read_phase(brdev, &cmd); + else /* MMC_DATA_WRITE */ + err = mmcspi_write_phase(brdev, &cmd); + if (MMC_ERR_NONE != err) { + if (MMC_ERR_BADCRC == err) + continue; + goto out; + } + } + break; + } + + if (MMC_ERR_NONE != err) + goto out; + + /* + * If this was an ACMD_SD_SEND_OP_COND or MMC_SEND_OP_COND, we need + * to return an OCR value in the result. If the response from the + * card indicates it is still in the IDLE state, supply the OCR + * value obtained after the last CMD8, otherwise issue an + * MMCSPI_READ_OCR to get the current value, which will have a valid + * CCS bit. + * + * This dance is required under this emulation approach because the + * spec stipulates that no other commands should be sent while + * ACMD_SD_SEND_OP_COND is being used to poll for the end of the + * IDLE state, and some cards do enforce that requirement. + */ + if (IS_ACMD(ACMD_SD_SEND_OP_COND, opcode, flags) || + IS_CMD(MMC_SEND_OP_COND, opcode, flags)) { + + if (rspbuf[0] & MMCSPI_R1_IDLE) + memcpy(&rspbuf[1], slot->last_ocr, MMCSPI_OCR_LEN); + else { + + /* + * Some cards won't accept the MMCSPI_CRC_ON_OFF + * command until initialization is complete. + * + * Examples: + * + * Super Talent 1GB SDSC card, cid: + * mid=0x1b oid=0x534d pnm="00000" prv=1.0 mdt=02.2010 + */ + if (!slot->crc_init_done) { + err = mmcspi_update_crc_setting(brdev, + sc->use_crc); + if (MMC_ERR_NONE != err) + goto out; + slot->crc_init_done = 1; + } + + for (j = 0; j <= cmd.retries; j++) { + /* + * Note that in this case, we pass on the R1 + * from READ_OCR. + */ + err = mmcspi_get_ocr(brdev, rspbuf); + if (MMC_ERR_NONE != err) { + if (MMC_ERR_BADCRC == err) + continue; + + goto out; + } + + } + + if (MMC_ERR_NONE != err) + goto out; + + } + + /* adjust the SPI response type to include the OCR */ + cmd.rsp_type = MMCSPI_RSP_R3; + } + + err = mmcspi_translate_response(brdev, &cmd, rspbuf); + if (MMC_ERR_NONE != err) + goto out; + + out: + slot->last_opcode = mmc_cmd->opcode; + slot->last_flags = mmc_cmd->flags; + + mmc_cmd->error = err; + + if (req->done) + req->done(req); + + TRACE_EXIT(brdev); + + return (err); +} + +static int +mmcspi_get_ro(device_t brdev, device_t reqdev) +{ + + TRACE_ENTER(brdev); + TRACE_EXIT(brdev); + + /* XXX no support for this currently */ + return (0); +} + +static int +mmcspi_acquire_host(device_t brdev, device_t reqdev) +{ + struct mmcspi_slot *slot; + int err; + + TRACE_ENTER(brdev); + err = 0; + + slot = device_get_ivars(reqdev); + + MMCSPI_LOCK_SLOT(slot); + while (slot->bus_busy) + mtx_sleep(slot, &slot->mtx, 0, "mmcspiah", 0); + slot->bus_busy++; + MMCSPI_UNLOCK_SLOT(slot); + + TRACE_EXIT(brdev); + + return (err); +} + +static int +mmcspi_release_host(device_t brdev, device_t reqdev) +{ + struct mmcspi_slot *slot; + + TRACE_ENTER(brdev); + + slot = device_get_ivars(reqdev); + + MMCSPI_LOCK_SLOT(slot); + slot->bus_busy--; + MMCSPI_UNLOCK_SLOT(slot); + + wakeup(slot); + + TRACE_EXIT(brdev); + + return (0); +} + +static int +mmcspi_modevent_handler(module_t mod, int what, void *arg) +{ + + switch (what) { + case MOD_LOAD: + init_crc7tab(); + init_crc16tab(); + memset(onesbuf, 0xff, sizeof(onesbuf)); + break; + default: + return (EOPNOTSUPP); + } + + return (0); +} + +static int +mmcspi_switch_vccq(device_t bus, device_t child) +{ + + return (0); +} + +#if defined(MMCSPI_ENABLE_DEBUG_FUNCS) +static void +mmcspi_dump_data(device_t dev, const char *label, uint8_t *data, + unsigned int len) +{ + unsigned int i, j; + unsigned int num_lines; + unsigned int residual; + + TRACE_ENTER(dev); + + num_lines = len / 16; + residual = len - 16 * num_lines; + + for(i = 0; i < num_lines; i++) { + device_printf(dev, "%s:", label); + for(j = 0; j < 16; j++) + printf(" %02x", data[i * 16 + j]); + printf("\n"); + } + + if (residual) { + device_printf(dev, "%s:", label); + for(j = 0; j < residual; j++) + printf(" %02x", data[num_lines * 16 + j]); + printf("\n"); + } + + TRACE_EXIT(dev); +} + +static void +mmcspi_dump_spi_bus(device_t dev, unsigned int len) +{ + unsigned int num_blocks; + unsigned int residual; + unsigned int i; + + TRACE_ENTER(dev); + + num_blocks = len / MMCSPI_DATA_BLOCK_LEN; + residual = len - num_blocks * MMCSPI_DATA_BLOCK_LEN; + + for (i = 0; i < num_blocks; i++) { + if (MMC_ERR_NONE != mmcspi_do_spi_read(dev, junkbuf, + MMCSPI_DATA_BLOCK_LEN)) { + device_printf(dev, "spi read failed\n"); + return; + } + + mmcspi_dump_data(dev, "bus_data", junkbuf, + MMCSPI_DATA_BLOCK_LEN); + } + + if (residual) { + if (MMC_ERR_NONE != mmcspi_do_spi_read(dev, junkbuf, + residual)) { + device_printf(dev, "spi read failed\n"); + return; + } + + mmcspi_dump_data(dev, "bus_data", junkbuf, residual); + } + + TRACE_EXIT(dev); +} +#endif + +static device_method_t mmcspi_methods[] = { + /* device_if */ + DEVMETHOD(device_probe, mmcspi_probe), + DEVMETHOD(device_attach, mmcspi_attach), + DEVMETHOD(device_detach, mmcspi_detach), + DEVMETHOD(device_suspend, mmcspi_suspend), + DEVMETHOD(device_resume, mmcspi_resume), + + /* Bus interface */ + DEVMETHOD(bus_read_ivar, mmcspi_read_ivar), + DEVMETHOD(bus_write_ivar, mmcspi_write_ivar), + + /* mmcbr_if */ + DEVMETHOD(mmcbr_update_ios, mmcspi_update_ios), + DEVMETHOD(mmcbr_request, mmcspi_request), + DEVMETHOD(mmcbr_get_ro, mmcspi_get_ro), + DEVMETHOD(mmcbr_acquire_host, mmcspi_acquire_host), + DEVMETHOD(mmcbr_release_host, mmcspi_release_host), + DEVMETHOD(mmcbr_switch_vccq, mmcspi_switch_vccq), + + {0, 0}, +}; + +static driver_t mmcspi_driver = { + "mmcspi", + mmcspi_methods, + sizeof(struct mmcspi_softc), +}; + +DRIVER_MODULE(mmcspi, spibus, mmcspi_driver, mmcspi_modevent_handler, NULL); +MODULE_DEPEND(mmcspi, spibus, 1, 1, 1); +MMC_DECLARE_BRIDGE(mmcspi); +#ifdef FDT +SPIBUS_FDT_PNP_INFO(compat_data); +#endif |