* generic mmc spi driver
*
* Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
+ * Copyright 2019 Bhargav Shah <bhargavshah1988@gmail.com>
+ *
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#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)
/* 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,
+ bool resp_match, u8 resp_match_value)
{
- struct spi_slave *spi = mmc->priv;
- u8 cmdo[7];
- u8 r1;
- int i;
+ int i, rpos = 0, ret = 0;
+ u8 cmdo[7], r;
+
+ debug("%s: cmd%d cmdarg=0x%x resp_type=0x%x "
+ "resp_size=%d resp_match=%d resp_match_value=0x%x\n",
+ __func__, cmdidx, cmdarg, resp_type,
+ resp_size, resp_match, resp_match_value);
+
cmdo[0] = 0xff;
cmdo[1] = MMC_SPI_CMD(cmdidx);
cmdo[2] = cmdarg >> 24;
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);
+
+ if (resp_match) {
+ r = ~resp_match_value;
+ i = CMD_TIMEOUT;
+ while (i--) {
+ ret = dm_spi_xfer(dev, 1 * 8, NULL, &r, 0);
+ if (ret)
+ return ret;
+ debug(" resp%d=0x%x", rpos, r);
+ rpos++;
+ if (r == resp_match_value)
+ break;
+ }
+ if (!i && (r != resp_match_value))
+ return -ETIMEDOUT;
+ }
+
+ for (i = 0; i < resp_size; i++) {
+ if (i == 0 && resp_match) {
+ resp[i] = resp_match_value;
+ continue;
+ }
+ ret = dm_spi_xfer(dev, 1 * 8, NULL, &r, 0);
+ if (ret)
+ return ret;
+ debug(" resp%d=0x%x", rpos, r);
+ rpos++;
+ resp[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;
}
}
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);
+ debug("%s: data accepted\n", __func__);
+ 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;
}
}
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;
+ u8 *resp = NULL;
+ u32 resp_size = 0;
+ bool resp_match = false;
+ 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 = true;
+ 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_SEND_STATUS:
+ 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 = true;
+ 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 = true;
+ resp_match_value = R1_SPI_IDLE;
+ break;
+ };
+
+ ret = mmc_spi_sendcmd(dev, cmd->cmdidx, cmd->cmdarg, cmd->resp_type,
+ resp, resp_size, resp_match, resp_match_value);
+ if (ret)
goto done;
- } else if (cmd->resp_type == MMC_RSP_R2) {
- r1 = mmc_spi_readdata(mmc, cmd->response, 1, 16);
+
+ 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] = 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;
- }
- } else {
- debug("%s:data %x %x %x\n", __func__,
- data->flags, data->blocks, data->blocksize);
+ 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),
+};
projects / u-boot.git / commitdiff
