[U-Boot] [PATCH 3/4] mmc: mmc_spi: Re-write driver using DM framework
Anup Patel
anup at brainfault.org
Sat Jun 29 04:54:05 UTC 2019
On Fri, Jun 28, 2019 at 2:08 PM Anup Patel <Anup.Patel at wdc.com> wrote:
>
> From: Bhargav Shah <bhargavshah1988 at gmail.com>
>
> This patch rewrites MMC SPI driver using U-Boot DM
> framework and get it's working on SiFive Unleashed
> board.
>
> Signed-off-by: Bhargav Shah <bhargavshah1988 at gmail.com>
> Signed-off-by: Anup Patel <anup.patel at wdc.com>
> ---
> drivers/mmc/Kconfig | 18 ++
> drivers/mmc/mmc_spi.c | 455 ++++++++++++++++++++++++++----------------
> 2 files changed, 306 insertions(+), 167 deletions(-)
>
> diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
> index c23299ea96..f750dad00a 100644
> --- a/drivers/mmc/Kconfig
> +++ b/drivers/mmc/Kconfig
> @@ -46,6 +46,24 @@ config SPL_DM_MMC
>
> if MMC
>
> +config MMC_SPI
> + bool "Support for SPI-based MMC controller"
> + depends on DM_MMC && DM_SPI
> + help
> + This selects SPI-based MMC controllers.
> + If you have an MMC controller on a SPI bus, say Y here.
> +
> + If unsure, say N.
> +
> +config MMC_SPI_CRC_ON
> + bool "Support CRC for SPI-based MMC controller"
> + depends on MMC_SPI
> + default y
> + help
> + This enables CRC for SPI-based MMC controllers.
> +
> + If unsure, say N.
> +
> config ARM_PL180_MMCI
> bool "ARM AMBA Multimedia Card Interface and compatible support"
> depends on DM_MMC && OF_CONTROL
> diff --git a/drivers/mmc/mmc_spi.c b/drivers/mmc/mmc_spi.c
> index 4f57990d9c..640c0ba6e6 100644
> --- a/drivers/mmc/mmc_spi.c
> +++ b/drivers/mmc/mmc_spi.c
> @@ -2,6 +2,8 @@
> * generic mmc spi driver
> *
> * Copyright (C) 2010 Thomas Chou <thomas at wytron.com.tw>
> + * Copyright 2019 Bhargav Shah <bhargavshah1988 at gmail.com>
> + *
> * Licensed under the GPL-2 or later.
> */
> #include <common.h>
> @@ -9,21 +11,23 @@
> #include <malloc.h>
> #include <part.h>
> #include <mmc.h>
> -#include <spi.h>
> +#include <stdlib.h>
> #include <u-boot/crc.h>
> #include <linux/crc7.h>
> #include <asm/byteorder.h>
> +#include <dm.h>
> +#include <spi.h>
>
> /* MMC/SD in SPI mode reports R1 status always */
> -#define R1_SPI_IDLE (1 << 0)
> -#define R1_SPI_ERASE_RESET (1 << 1)
> -#define R1_SPI_ILLEGAL_COMMAND (1 << 2)
> -#define R1_SPI_COM_CRC (1 << 3)
> -#define R1_SPI_ERASE_SEQ (1 << 4)
> -#define R1_SPI_ADDRESS (1 << 5)
> -#define R1_SPI_PARAMETER (1 << 6)
> +#define R1_SPI_IDLE BIT(0)
> +#define R1_SPI_ERASE_RESET BIT(1)
> +#define R1_SPI_ILLEGAL_COMMAND BIT(2)
> +#define R1_SPI_COM_CRC BIT(3)
> +#define R1_SPI_ERASE_SEQ BIT(4)
> +#define R1_SPI_ADDRESS BIT(5)
> +#define R1_SPI_PARAMETER BIT(6)
> /* R1 bit 7 is always zero, reuse this bit for error */
> -#define R1_SPI_ERROR (1 << 7)
> +#define R1_SPI_ERROR BIT(7)
>
> /* Response tokens used to ack each block written: */
> #define SPI_MMC_RESPONSE_CODE(x) ((x) & 0x1f)
> @@ -34,28 +38,42 @@
> /* Read and write blocks start with these tokens and end with crc;
> * on error, read tokens act like a subset of R2_SPI_* values.
> */
> -#define SPI_TOKEN_SINGLE 0xfe /* single block r/w, multiblock read */
> -#define SPI_TOKEN_MULTI_WRITE 0xfc /* multiblock write */
> -#define SPI_TOKEN_STOP_TRAN 0xfd /* terminate multiblock write */
> +/* single block write multiblock read */
> +#define SPI_TOKEN_SINGLE 0xfe
> +/* multiblock write */
> +#define SPI_TOKEN_MULTI_WRITE 0xfc
> +/* terminate multiblock write */
> +#define SPI_TOKEN_STOP_TRAN 0xfd
>
> /* MMC SPI commands start with a start bit "0" and a transmit bit "1" */
> -#define MMC_SPI_CMD(x) (0x40 | (x & 0x3f))
> +#define MMC_SPI_CMD(x) (0x40 | (x))
>
> /* bus capability */
> -#define MMC_SPI_VOLTAGE (MMC_VDD_32_33 | MMC_VDD_33_34)
> -#define MMC_SPI_MIN_CLOCK 400000 /* 400KHz to meet MMC spec */
> +#define MMC_SPI_VOLTAGE (MMC_VDD_32_33 | MMC_VDD_33_34)
> +#define MMC_SPI_MIN_CLOCK 400000 /* 400KHz to meet MMC spec */
> +#define MMC_SPI_MAX_CLOCK 25000000 /* SD/MMC legacy speed */
>
> /* timeout value */
> -#define CTOUT 8
> -#define RTOUT 3000000 /* 1 sec */
> -#define WTOUT 3000000 /* 1 sec */
> +#define CMD_TIMEOUT 8
> +#define READ_TIMEOUT 3000000 /* 1 sec */
> +#define WRITE_TIMEOUT 3000000 /* 1 sec */
>
> -static uint mmc_spi_sendcmd(struct mmc *mmc, ushort cmdidx, u32 cmdarg)
> +struct mmc_spi_priv {
> + struct spi_slave *spi;
> + struct mmc_config cfg;
> + struct mmc mmc;
> +};
> +
> +static int mmc_spi_sendcmd(struct udevice *dev,
> + ushort cmdidx, u32 cmdarg, u32 resp_type,
> + u8 *resp, u32 resp_size)
> {
> - struct spi_slave *spi = mmc->priv;
> - u8 cmdo[7];
> - u8 r1;
> - int i;
> + int i, ret = 0;
> + u8 cmdo[7], r;
> +
> + debug("%s: cmd%d cmdarg=0x%x resp_type=0x%x\n",
> + __func__, cmdidx, cmdarg, resp_type);
> +
> cmdo[0] = 0xff;
> cmdo[1] = MMC_SPI_CMD(cmdidx);
> cmdo[2] = cmdarg >> 24;
> @@ -63,37 +81,58 @@ static uint mmc_spi_sendcmd(struct mmc *mmc, ushort cmdidx, u32 cmdarg)
> cmdo[4] = cmdarg >> 8;
> cmdo[5] = cmdarg;
> cmdo[6] = (crc7(0, &cmdo[1], 5) << 1) | 0x01;
> - spi_xfer(spi, sizeof(cmdo) * 8, cmdo, NULL, 0);
> - for (i = 0; i < CTOUT; i++) {
> - spi_xfer(spi, 1 * 8, NULL, &r1, 0);
> - if (i && (r1 & 0x80) == 0) /* r1 response */
> - break;
> + ret = dm_spi_xfer(dev, sizeof(cmdo) * 8, cmdo, NULL, 0);
> + if (ret)
> + return ret;
> +
> + ret = dm_spi_xfer(dev, 1 * 8, NULL, &r, 0);
> + if (ret)
> + return ret;
> +
> + if (!resp || !resp_size)
> + return 0;
> +
> + debug("%s: cmd%d", __func__, cmdidx);
> +
> + for (i = 0; i < resp_size; i++) {
> + ret = dm_spi_xfer(dev, 1 * 8, NULL, &r, 0);
> + if (ret)
> + return ret;
> + resp[i] = r;
> + debug(" resp%d=0x%x", i, r);
> }
> - debug("%s:cmd%d resp%d %x\n", __func__, cmdidx, i, r1);
> - return r1;
> +
> + debug("\n");
> +
> + return 0;
> }
>
> -static uint mmc_spi_readdata(struct mmc *mmc, void *xbuf,
> - u32 bcnt, u32 bsize)
> +static int mmc_spi_readdata(struct udevice *dev,
> + void *xbuf, u32 bcnt, u32 bsize)
> {
> - struct spi_slave *spi = mmc->priv;
> - u8 *buf = xbuf;
> - u8 r1;
> u16 crc;
> - int i;
> + u8 *buf = xbuf, r1;
> + int i, ret = 0;
> +
> while (bcnt--) {
> - for (i = 0; i < RTOUT; i++) {
> - spi_xfer(spi, 1 * 8, NULL, &r1, 0);
> - if (r1 != 0xff) /* data token */
> + for (i = 0; i < READ_TIMEOUT; i++) {
> + ret = dm_spi_xfer(dev, 1 * 8, NULL, &r1, 0);
> + if (ret)
> + return ret;
> + if (r1 == SPI_TOKEN_SINGLE)
> break;
> }
> - debug("%s:tok%d %x\n", __func__, i, r1);
> + debug("%s: data tok%d 0x%x\n", __func__, i, r1);
> if (r1 == SPI_TOKEN_SINGLE) {
> - spi_xfer(spi, bsize * 8, NULL, buf, 0);
> - spi_xfer(spi, 2 * 8, NULL, &crc, 0);
> + ret = dm_spi_xfer(dev, bsize * 8, NULL, buf, 0);
> + if (ret)
> + return ret;
> + ret = dm_spi_xfer(dev, 2 * 8, NULL, &crc, 0);
> + if (ret)
> + return ret;
> #ifdef CONFIG_MMC_SPI_CRC_ON
> - if (be_to_cpu16(crc16_ccitt(0, buf, bsize)) != crc) {
> - debug("%s: CRC error\n", mmc->cfg->name);
> + if (be16_to_cpu(crc16_ccitt(0, buf, bsize)) != crc) {
> + debug("%s: data crc error\n", __func__);
> r1 = R1_SPI_COM_CRC;
> break;
> }
> @@ -105,48 +144,55 @@ static uint mmc_spi_readdata(struct mmc *mmc, void *xbuf,
> }
> buf += bsize;
> }
> - return r1;
> +
> + if (r1 & R1_SPI_COM_CRC)
> + ret = -ECOMM;
> + else if (r1) /* other errors */
> + ret = -ETIMEDOUT;
> +
> + return ret;
> }
>
> -static uint mmc_spi_writedata(struct mmc *mmc, const void *xbuf,
> - u32 bcnt, u32 bsize, int multi)
> +static int mmc_spi_writedata(struct udevice *dev, const void *xbuf,
> + u32 bcnt, u32 bsize, int multi)
> {
> - struct spi_slave *spi = mmc->priv;
> const u8 *buf = xbuf;
> - u8 r1;
> + u8 r1, tok[2];
> u16 crc;
> - u8 tok[2];
> - int i;
> + int i, ret = 0;
> +
> tok[0] = 0xff;
> tok[1] = multi ? SPI_TOKEN_MULTI_WRITE : SPI_TOKEN_SINGLE;
> +
> while (bcnt--) {
> #ifdef CONFIG_MMC_SPI_CRC_ON
> crc = cpu_to_be16(crc16_ccitt(0, (u8 *)buf, bsize));
> #endif
> - spi_xfer(spi, 2 * 8, tok, NULL, 0);
> - spi_xfer(spi, bsize * 8, buf, NULL, 0);
> - spi_xfer(spi, 2 * 8, &crc, NULL, 0);
> - for (i = 0; i < CTOUT; i++) {
> - spi_xfer(spi, 1 * 8, NULL, &r1, 0);
> + dm_spi_xfer(dev, 2 * 8, tok, NULL, 0);
> + dm_spi_xfer(dev, bsize * 8, buf, NULL, 0);
> + dm_spi_xfer(dev, 2 * 8, &crc, NULL, 0);
> + for (i = 0; i < CMD_TIMEOUT; i++) {
> + dm_spi_xfer(dev, 1 * 8, NULL, &r1, 0);
> if ((r1 & 0x10) == 0) /* response token */
> break;
> }
> - debug("%s:tok%d %x\n", __func__, i, r1);
> + debug("%s: data tok%d 0x%x\n", __func__, i, r1);
> if (SPI_MMC_RESPONSE_CODE(r1) == SPI_RESPONSE_ACCEPTED) {
> - for (i = 0; i < WTOUT; i++) { /* wait busy */
> - spi_xfer(spi, 1 * 8, NULL, &r1, 0);
> + for (i = 0; i < WRITE_TIMEOUT; i++) { /* wait busy */
> + dm_spi_xfer(dev, 1 * 8, NULL, &r1, 0);
> if (i && r1 == 0xff) {
> r1 = 0;
> break;
> }
> }
> - if (i == WTOUT) {
> - debug("%s:wtout %x\n", __func__, r1);
> + if (i == WRITE_TIMEOUT) {
> + debug("%s: data write timeout 0x%x\n",
> + __func__, r1);
> r1 = R1_SPI_ERROR;
> break;
> }
> } else {
> - debug("%s: err %x\n", __func__, r1);
> + debug("%s: data error 0x%x\n", __func__, r1);
> r1 = R1_SPI_COM_CRC;
> break;
> }
> @@ -154,140 +200,215 @@ static uint mmc_spi_writedata(struct mmc *mmc, const void *xbuf,
> }
> if (multi && bcnt == -1) { /* stop multi write */
> tok[1] = SPI_TOKEN_STOP_TRAN;
> - spi_xfer(spi, 2 * 8, tok, NULL, 0);
> - for (i = 0; i < WTOUT; i++) { /* wait busy */
> - spi_xfer(spi, 1 * 8, NULL, &r1, 0);
> + dm_spi_xfer(dev, 2 * 8, tok, NULL, 0);
> + for (i = 0; i < WRITE_TIMEOUT; i++) { /* wait busy */
> + dm_spi_xfer(dev, 1 * 8, NULL, &r1, 0);
> if (i && r1 == 0xff) {
> r1 = 0;
> break;
> }
> }
> - if (i == WTOUT) {
> - debug("%s:wstop %x\n", __func__, r1);
> + if (i == WRITE_TIMEOUT) {
> + debug("%s: data write timeout 0x%x\n", __func__, r1);
> r1 = R1_SPI_ERROR;
> }
> }
> - return r1;
> -}
>
> -static int mmc_spi_request(struct mmc *mmc, struct mmc_cmd *cmd,
> - struct mmc_data *data)
> -{
> - struct spi_slave *spi = mmc->priv;
> - u8 r1;
> - int i;
> - int ret = 0;
> - debug("%s:cmd%d %x %x\n", __func__,
> - cmd->cmdidx, cmd->resp_type, cmd->cmdarg);
> - spi_claim_bus(spi);
> - spi_cs_activate(spi);
> - r1 = mmc_spi_sendcmd(mmc, cmd->cmdidx, cmd->cmdarg);
> - if (r1 == 0xff) { /* no response */
> - ret = -ENOMEDIUM;
> - goto done;
> - } else if (r1 & R1_SPI_COM_CRC) {
> + if (r1 & R1_SPI_COM_CRC)
> ret = -ECOMM;
> - goto done;
> - } else if (r1 & ~R1_SPI_IDLE) { /* other errors */
> + else if (r1) /* other errors */
> ret = -ETIMEDOUT;
> +
> + return ret;
> +}
> +
> +static int dm_mmc_spi_set_ios(struct udevice *dev)
> +{
> + return 0;
> +}
> +
> +static int dm_mmc_spi_request(struct udevice *dev, struct mmc_cmd *cmd,
> + struct mmc_data *data)
> +{
> + int i, multi, ret = 0;
> + u32 resp_size = 0;
> + u8 *resp = NULL, *resp_match = NULL;
> + u8 resp8 = 0, resp40[5] = { 0 }, resp_match_value = 0;
> +
> + dm_spi_claim_bus(dev);
> +
> + for (i = 0; i < 4; i++)
> + cmd->response[i] = 0;
> +
> + switch (cmd->cmdidx) {
> + case SD_CMD_APP_SEND_OP_COND:
> + case MMC_CMD_SEND_OP_COND:
> + resp = &resp8;
> + resp_size = sizeof(resp8);
> + cmd->cmdarg = 0x40000000;
> + break;
> + case SD_CMD_SEND_IF_COND:
> + resp = (u8 *)&resp40[0];
> + resp_size = sizeof(resp40);
> + resp_match = &resp40[0];
> + resp_match_value = R1_SPI_IDLE;
> + break;
> + case MMC_CMD_SPI_READ_OCR:
> + resp = (u8 *)&resp40[0];
> + resp_size = sizeof(resp40);
> + break;
> + case MMC_CMD_SET_BLOCKLEN:
> + case MMC_CMD_SPI_CRC_ON_OFF:
> + case MMC_CMD_STOP_TRANSMISSION:
> + resp = &resp8;
> + resp_size = sizeof(resp8);
> + resp_match = &resp8;
> + resp_match_value = 0x0;
> + break;
> + case MMC_CMD_SEND_CSD:
> + case MMC_CMD_SEND_CID:
> + case MMC_CMD_READ_SINGLE_BLOCK:
> + case MMC_CMD_READ_MULTIPLE_BLOCK:
> + case MMC_CMD_WRITE_SINGLE_BLOCK:
> + case MMC_CMD_WRITE_MULTIPLE_BLOCK:
> + break;
> + default:
> + resp = &resp8;
> + resp_size = sizeof(resp8);
> + resp_match = &resp8;
> + resp_match_value = R1_SPI_IDLE;
> + break;
> + };
> +
> + ret = mmc_spi_sendcmd(dev, cmd->cmdidx, cmd->cmdarg, cmd->resp_type,
> + resp, resp_size);
> + if (ret)
> goto done;
> - } else if (cmd->resp_type == MMC_RSP_R2) {
> - r1 = mmc_spi_readdata(mmc, cmd->response, 1, 16);
> - for (i = 0; i < 4; i++)
> - cmd->response[i] = be32_to_cpu(cmd->response[i]);
> - debug("r128 %x %x %x %x\n", cmd->response[0], cmd->response[1],
> - cmd->response[2], cmd->response[3]);
> - } else if (!data) {
> - switch (cmd->cmdidx) {
> - case SD_CMD_APP_SEND_OP_COND:
> - case MMC_CMD_SEND_OP_COND:
> - cmd->response[0] = (r1 & R1_SPI_IDLE) ? 0 : OCR_BUSY;
> - break;
> - case SD_CMD_SEND_IF_COND:
> - case MMC_CMD_SPI_READ_OCR:
> - spi_xfer(spi, 4 * 8, NULL, cmd->response, 0);
> - cmd->response[0] = be32_to_cpu(cmd->response[0]);
> - debug("r32 %x\n", cmd->response[0]);
> - break;
> - case MMC_CMD_SEND_STATUS:
> - spi_xfer(spi, 1 * 8, NULL, cmd->response, 0);
> - cmd->response[0] = (cmd->response[0] & 0xff) ?
> - MMC_STATUS_ERROR : MMC_STATUS_RDY_FOR_DATA;
> - break;
> +
> + if (resp && resp_match && (*resp_match != resp_match_value)) {
> + i = CMD_TIMEOUT;
> + while (i--) {
> + ret = dm_spi_xfer(dev, 1 * 8, NULL, resp, resp_size);
> + if (ret)
> + return ret;
> + if (*resp_match == resp_match_value)
> + break;
The response matching part belongs to mmc_spi_sendcmd().
Also, we should match zero for SEND_STATUS (CMD13).
I will send v2 to take care of above.
Regards,
Anup
> }
> - } else {
> - debug("%s:data %x %x %x\n", __func__,
> - data->flags, data->blocks, data->blocksize);
> + if (!i && (*resp_match != resp_match_value))
> + return -ETIMEDOUT;
> + }
> +
> + switch (cmd->cmdidx) {
> + case SD_CMD_APP_SEND_OP_COND:
> + case MMC_CMD_SEND_OP_COND:
> + cmd->response[0] = (resp8 & R1_SPI_IDLE) ? 0 : OCR_BUSY;
> + break;
> + case SD_CMD_SEND_IF_COND:
> + case MMC_CMD_SPI_READ_OCR:
> + cmd->response[0] = resp40[4];
> + cmd->response[0] |= (uint)resp40[3] << 8;
> + cmd->response[0] |= (uint)resp40[2] << 16;
> + cmd->response[0] |= (uint)resp40[1] << 24;
> + break;
> + case MMC_CMD_SEND_STATUS:
> + cmd->response[0] = (resp8 & 0xff) ?
> + MMC_STATUS_ERROR : MMC_STATUS_RDY_FOR_DATA;
> + break;
> + case MMC_CMD_SEND_CID:
> + case MMC_CMD_SEND_CSD:
> + ret = mmc_spi_readdata(dev, cmd->response, 1, 16);
> + if (ret)
> + return ret;
> + for (i = 0; i < 4; i++)
> + cmd->response[i] =
> + cpu_to_be32(cmd->response[i]);
> + break;
> + default:
> + cmd->response[0] = resp8;
> + break;
> + }
> +
> + debug("%s: cmd%d resp0=0x%x resp1=0x%x resp2=0x%x resp3=0x%x\n",
> + __func__, cmd->cmdidx, cmd->response[0], cmd->response[1],
> + cmd->response[2], cmd->response[3]);
> +
> + if (data) {
> + debug("%s: data flags=0x%x blocks=%d block_size=%d\n",
> + __func__, data->flags, data->blocks, data->blocksize);
> + multi = (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK);
> if (data->flags == MMC_DATA_READ)
> - r1 = mmc_spi_readdata(mmc, data->dest,
> - data->blocks, data->blocksize);
> + ret = mmc_spi_readdata(dev, data->dest,
> + data->blocks, data->blocksize);
> else if (data->flags == MMC_DATA_WRITE)
> - r1 = mmc_spi_writedata(mmc, data->src,
> - data->blocks, data->blocksize,
> - (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK));
> - if (r1 & R1_SPI_COM_CRC)
> - ret = -ECOMM;
> - else if (r1) /* other errors */
> - ret = -ETIMEDOUT;
> + ret = mmc_spi_writedata(dev, data->src,
> + data->blocks, data->blocksize,
> + multi);
> }
> +
> done:
> - spi_cs_deactivate(spi);
> - spi_release_bus(spi);
> + dm_spi_release_bus(dev);
> +
> return ret;
> }
>
> -static int mmc_spi_set_ios(struct mmc *mmc)
> +static int mmc_spi_probe(struct udevice *dev)
> {
> - struct spi_slave *spi = mmc->priv;
> + struct mmc_spi_priv *priv = dev_get_priv(dev);
> + struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
> + char *name;
> +
> + priv->spi = dev_get_parent_priv(dev);
> + if (!priv->spi->max_hz)
> + priv->spi->max_hz = MMC_SPI_MAX_CLOCK;
> + priv->spi->speed = 0;
> + priv->spi->mode = SPI_MODE_0;
> + priv->spi->wordlen = 8;
> +
> + name = malloc(strlen(dev->parent->name) + strlen(dev->name) + 4);
> + if (!name)
> + return -ENOMEM;
> + sprintf(name, "%s:%s", dev->parent->name, dev->name);
> +
> + priv->cfg.name = name;
> + priv->cfg.host_caps = MMC_MODE_SPI;
> + priv->cfg.voltages = MMC_SPI_VOLTAGE;
> + priv->cfg.f_min = MMC_SPI_MIN_CLOCK;
> + priv->cfg.f_max = priv->spi->max_hz;
> + priv->cfg.part_type = PART_TYPE_DOS;
> + priv->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
> +
> + priv->mmc.cfg = &priv->cfg;
> + priv->mmc.priv = priv;
> + priv->mmc.dev = dev;
> +
> + upriv->mmc = &priv->mmc;
>
> - debug("%s: clock %u\n", __func__, mmc->clock);
> - if (mmc->clock)
> - spi_set_speed(spi, mmc->clock);
> return 0;
> }
>
> -static int mmc_spi_init_p(struct mmc *mmc)
> +static int mmc_spi_bind(struct udevice *dev)
> {
> - struct spi_slave *spi = mmc->priv;
> - spi_set_speed(spi, MMC_SPI_MIN_CLOCK);
> - spi_claim_bus(spi);
> - /* cs deactivated for 100+ clock */
> - spi_xfer(spi, 18 * 8, NULL, NULL, 0);
> - spi_release_bus(spi);
> - return 0;
> + struct mmc_spi_priv *priv = dev_get_priv(dev);
> +
> + return mmc_bind(dev, &priv->mmc, &priv->cfg);
> }
>
> -static const struct mmc_ops mmc_spi_ops = {
> - .send_cmd = mmc_spi_request,
> - .set_ios = mmc_spi_set_ios,
> - .init = mmc_spi_init_p,
> +static const struct dm_mmc_ops mmc_spi_ops = {
> + .send_cmd = dm_mmc_spi_request,
> + .set_ios = dm_mmc_spi_set_ios,
> };
>
> -static struct mmc_config mmc_spi_cfg = {
> - .name = "MMC_SPI",
> - .ops = &mmc_spi_ops,
> - .host_caps = MMC_MODE_SPI,
> - .voltages = MMC_SPI_VOLTAGE,
> - .f_min = MMC_SPI_MIN_CLOCK,
> - .part_type = PART_TYPE_DOS,
> - .b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
> +static const struct udevice_id dm_mmc_spi_match[] = {
> + { .compatible = "mmc-spi-slot" },
> + { /* sentinel */ }
> };
>
> -struct mmc *mmc_spi_init(uint bus, uint cs, uint speed, uint mode)
> -{
> - struct mmc *mmc;
> - struct spi_slave *spi;
> -
> - spi = spi_setup_slave(bus, cs, speed, mode);
> - if (spi == NULL)
> - return NULL;
> -
> - mmc_spi_cfg.f_max = speed;
> -
> - mmc = mmc_create(&mmc_spi_cfg, spi);
> - if (mmc == NULL) {
> - spi_free_slave(spi);
> - return NULL;
> - }
> - return mmc;
> -}
> +U_BOOT_DRIVER(mmc_spi) = {
> + .name = "mmc_spi",
> + .id = UCLASS_MMC,
> + .of_match = dm_mmc_spi_match,
> + .ops = &mmc_spi_ops,
> + .probe = mmc_spi_probe,
> + .bind = mmc_spi_bind,
> + .priv_auto_alloc_size = sizeof(struct mmc_spi_priv),
> +};
> --
> 2.17.1
>
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