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-rw-r--r--common/Makefile1
-rw-r--r--common/cmd_mmc.c3
-rw-r--r--common/cmd_mmc_spi.c88
-rw-r--r--drivers/mmc/Makefile1
-rw-r--r--drivers/mmc/fsl_esdhc.c6
-rw-r--r--drivers/mmc/mmc.c262
-rw-r--r--drivers/mmc/mmc_spi.c280
-rw-r--r--drivers/spi/cf_spi.c14
-rw-r--r--include/mmc.h11
9 files changed, 616 insertions, 50 deletions
diff --git a/common/Makefile b/common/Makefile
index 4555716..6f41ce4 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -118,6 +118,7 @@ COBJS-$(CONFIG_CMD_MII) += miiphyutil.o
COBJS-$(CONFIG_CMD_MII) += cmd_mii.o
COBJS-$(CONFIG_CMD_MISC) += cmd_misc.o
COBJS-$(CONFIG_CMD_MMC) += cmd_mmc.o
+COBJS-$(CONFIG_CMD_MMC_SPI) += cmd_mmc_spi.o
COBJS-$(CONFIG_MP) += cmd_mp.o
COBJS-$(CONFIG_CMD_MTDPARTS) += cmd_mtdparts.o
COBJS-$(CONFIG_CMD_NAND) += cmd_nand.o
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
index 4323f76..6166749 100644
--- a/common/cmd_mmc.c
+++ b/common/cmd_mmc.c
@@ -104,7 +104,8 @@ static void print_mmcinfo(struct mmc *mmc)
(mmc->version >> 4) & 0xf, mmc->version & 0xf);
printf("High Capacity: %s\n", mmc->high_capacity ? "Yes" : "No");
- printf("Capacity: %lld\n", mmc->capacity);
+ puts("Capacity: ");
+ print_size(mmc->capacity, "\n");
printf("Bus Width: %d-bit\n", mmc->bus_width);
}
diff --git a/common/cmd_mmc_spi.c b/common/cmd_mmc_spi.c
new file mode 100644
index 0000000..63fe313
--- /dev/null
+++ b/common/cmd_mmc_spi.c
@@ -0,0 +1,88 @@
+/*
+ * Command for mmc_spi setup.
+ *
+ * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include <spi.h>
+
+#ifndef CONFIG_MMC_SPI_BUS
+# define CONFIG_MMC_SPI_BUS 0
+#endif
+#ifndef CONFIG_MMC_SPI_CS
+# define CONFIG_MMC_SPI_CS 1
+#endif
+/* in SPI mode, MMC speed limit is 20MHz, while SD speed limit is 25MHz */
+#ifndef CONFIG_MMC_SPI_SPEED
+# define CONFIG_MMC_SPI_SPEED 25000000
+#endif
+/* MMC and SD specs only seem to care that sampling is on the
+ * rising edge ... meaning SPI modes 0 or 3. So either SPI mode
+ * should be legit. We'll use mode 0 since the steady state is 0,
+ * which is appropriate for hotplugging, unless the platform data
+ * specify mode 3 (if hardware is not compatible to mode 0).
+ */
+#ifndef CONFIG_MMC_SPI_MODE
+# define CONFIG_MMC_SPI_MODE SPI_MODE_0
+#endif
+
+static int do_mmc_spi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ uint bus = CONFIG_MMC_SPI_BUS;
+ uint cs = CONFIG_MMC_SPI_CS;
+ uint speed = CONFIG_MMC_SPI_SPEED;
+ uint mode = CONFIG_MMC_SPI_MODE;
+ char *endp;
+ struct mmc *mmc;
+
+ if (argc < 2)
+ goto usage;
+
+ cs = simple_strtoul(argv[1], &endp, 0);
+ if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
+ goto usage;
+ if (*endp == ':') {
+ if (endp[1] == 0)
+ goto usage;
+ bus = cs;
+ cs = simple_strtoul(endp + 1, &endp, 0);
+ if (*endp != 0)
+ goto usage;
+ }
+ if (argc >= 3) {
+ speed = simple_strtoul(argv[2], &endp, 0);
+ if (*argv[2] == 0 || *endp != 0)
+ goto usage;
+ }
+ if (argc >= 4) {
+ mode = simple_strtoul(argv[3], &endp, 16);
+ if (*argv[3] == 0 || *endp != 0)
+ goto usage;
+ }
+ if (!spi_cs_is_valid(bus, cs)) {
+ printf("Invalid SPI bus %u cs %u\n", bus, cs);
+ return 1;
+ }
+
+ mmc = mmc_spi_init(bus, cs, speed, mode);
+ if (!mmc) {
+ printf("Failed to create MMC Device\n");
+ return 1;
+ }
+ printf("%s: %d at %u:%u hz %u mode %u\n", mmc->name, mmc->block_dev.dev,
+ bus, cs, speed, mode);
+ return 0;
+
+usage:
+ cmd_usage(cmdtp);
+ return 1;
+}
+
+U_BOOT_CMD(
+ mmc_spi, 4, 0, do_mmc_spi,
+ "mmc_spi setup",
+ "[bus:]cs [hz] [mode] - setup mmc_spi device"
+);
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 3496f0a..9aca3a2 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -31,6 +31,7 @@ COBJS-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o
COBJS-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o
COBJS-$(CONFIG_GENERIC_MMC) += mmc.o
COBJS-$(CONFIG_GENERIC_ATMEL_MCI) += gen_atmel_mci.o
+COBJS-$(CONFIG_MMC_SPI) += mmc_spi.o
COBJS-$(CONFIG_MXC_MMC) += mxcmmc.o
COBJS-$(CONFIG_OMAP3_MMC) += omap3_mmc.o
COBJS-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 4f1b515..2838795 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -332,11 +332,11 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
do {
irqstat = esdhc_read32(&regs->irqstat);
- if (irqstat & DATA_ERR)
- return COMM_ERR;
-
if (irqstat & IRQSTAT_DTOE)
return TIMEOUT;
+
+ if (irqstat & DATA_ERR)
+ return COMM_ERR;
} while (!(irqstat & IRQSTAT_TC) &&
(esdhc_read32(&regs->prsstat) & PRSSTAT_DLA));
#endif
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 6805b33..f27b7c7 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -30,9 +30,13 @@
#include <part.h>
#include <malloc.h>
#include <linux/list.h>
-#include <mmc.h>
#include <div64.h>
+/* Set block count limit because of 16 bit register limit on some hardware*/
+#ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT
+#define CONFIG_SYS_MMC_MAX_BLK_COUNT 65535
+#endif
+
static struct list_head mmc_devices;
static int cur_dev_num = -1;
@@ -45,7 +49,100 @@ int board_mmc_getcd(u8 *cd, struct mmc *mmc)__attribute__((weak,
int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
+#ifdef CONFIG_MMC_TRACE
+ int ret;
+ int i;
+ u8 *ptr;
+
+ printf("CMD_SEND:%d\n", cmd->cmdidx);
+ printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg);
+ printf("\t\tFLAG\t\t\t %d\n", cmd->flags);
+ ret = mmc->send_cmd(mmc, cmd, data);
+ switch (cmd->resp_type) {
+ case MMC_RSP_NONE:
+ printf("\t\tMMC_RSP_NONE\n");
+ break;
+ case MMC_RSP_R1:
+ printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n",
+ cmd->response[0]);
+ break;
+ case MMC_RSP_R1b:
+ printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n",
+ cmd->response[0]);
+ break;
+ case MMC_RSP_R2:
+ printf("\t\tMMC_RSP_R2\t\t 0x%08X \n",
+ cmd->response[0]);
+ printf("\t\t \t\t 0x%08X \n",
+ cmd->response[1]);
+ printf("\t\t \t\t 0x%08X \n",
+ cmd->response[2]);
+ printf("\t\t \t\t 0x%08X \n",
+ cmd->response[3]);
+ printf("\n");
+ printf("\t\t\t\t\tDUMPING DATA\n");
+ for (i = 0; i < 4; i++) {
+ int j;
+ printf("\t\t\t\t\t%03d - ", i*4);
+ ptr = &cmd->response[i];
+ ptr += 3;
+ for (j = 0; j < 4; j++)
+ printf("%02X ", *ptr--);
+ printf("\n");
+ }
+ break;
+ case MMC_RSP_R3:
+ printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n",
+ cmd->response[0]);
+ break;
+ default:
+ printf("\t\tERROR MMC rsp not supported\n");
+ break;
+ }
+ return ret;
+#else
return mmc->send_cmd(mmc, cmd, data);
+#endif
+}
+
+int mmc_send_status(struct mmc *mmc, int timeout)
+{
+ struct mmc_cmd cmd;
+ int err;
+#ifdef CONFIG_MMC_TRACE
+ int status;
+#endif
+
+ cmd.cmdidx = MMC_CMD_SEND_STATUS;
+ cmd.resp_type = MMC_RSP_R1;
+ cmd.cmdarg = 0;
+ cmd.flags = 0;
+
+ do {
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+ if (err)
+ return err;
+ else if (cmd.response[0] & MMC_STATUS_RDY_FOR_DATA)
+ break;
+
+ udelay(1000);
+
+ if (cmd.response[0] & MMC_STATUS_MASK) {
+ printf("Status Error: 0x%08X\n", cmd.response[0]);
+ return COMM_ERR;
+ }
+ } while (timeout--);
+
+#ifdef CONFIG_MMC_TRACE
+ status = (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9;
+ printf("CURR STATE:%d\n", status);
+#endif
+ if (!timeout) {
+ printf("Timeout waiting card ready\n");
+ return TIMEOUT;
+ }
+
+ return 0;
}
int mmc_set_blocklen(struct mmc *mmc, int len)
@@ -82,6 +179,7 @@ mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
{
struct mmc_cmd cmd;
struct mmc_data data;
+ int timeout = 1000;
if ((start + blkcnt) > mmc->block_dev.lba) {
printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
@@ -112,7 +210,10 @@ mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
return 0;
}
- if (blkcnt > 1) {
+ /* SPI multiblock writes terminate using a special
+ * token, not a STOP_TRANSMISSION request.
+ */
+ if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
cmd.cmdarg = 0;
cmd.resp_type = MMC_RSP_R1b;
@@ -121,6 +222,9 @@ mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
printf("mmc fail to send stop cmd\n");
return 0;
}
+
+ /* Waiting for the ready status */
+ mmc_send_status(mmc, timeout);
}
return blkcnt;
@@ -139,11 +243,8 @@ mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
return 0;
do {
- /*
- * The 65535 constraint comes from some hardware has
- * only 16 bit width block number counter
- */
- cur = (blocks_todo > 65535) ? 65535 : blocks_todo;
+ cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
+ CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
if(mmc_write_blocks(mmc, start, cur, src) != cur)
return 0;
blocks_todo -= cur;
@@ -158,6 +259,7 @@ int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
{
struct mmc_cmd cmd;
struct mmc_data data;
+ int timeout = 1000;
if (blkcnt > 1)
cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
@@ -189,6 +291,9 @@ int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
printf("mmc fail to send stop cmd\n");
return 0;
}
+
+ /* Waiting for the ready status */
+ mmc_send_status(mmc, timeout);
}
return blkcnt;
@@ -215,11 +320,8 @@ static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
return 0;
do {
- /*
- * The 65535 constraint comes from some hardware has
- * only 16 bit width block number counter
- */
- cur = (blocks_todo > 65535) ? 65535 : blocks_todo;
+ cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
+ CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
if(mmc_read_blocks(mmc, dst, start, cur) != cur)
return 0;
blocks_todo -= cur;
@@ -280,7 +382,8 @@ sd_send_op_cond(struct mmc *mmc)
* how to manage low voltages SD card is not yet
* specified.
*/
- cmd.cmdarg = mmc->voltages & 0xff8000;
+ cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
+ (mmc->voltages & 0xff8000);
if (mmc->version == SD_VERSION_2)
cmd.cmdarg |= OCR_HCS;
@@ -299,6 +402,18 @@ sd_send_op_cond(struct mmc *mmc)
if (mmc->version != SD_VERSION_2)
mmc->version = SD_VERSION_1_0;
+ if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
+ cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
+ cmd.resp_type = MMC_RSP_R3;
+ cmd.cmdarg = 0;
+ cmd.flags = 0;
+
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+
+ if (err)
+ return err;
+ }
+
mmc->ocr = cmd.response[0];
mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
@@ -309,17 +424,33 @@ sd_send_op_cond(struct mmc *mmc)
int mmc_send_op_cond(struct mmc *mmc)
{
- int timeout = 1000;
+ int timeout = 10000;
struct mmc_cmd cmd;
int err;
/* Some cards seem to need this */
mmc_go_idle(mmc);
+ /* Asking to the card its capabilities */
+ cmd.cmdidx = MMC_CMD_SEND_OP_COND;
+ cmd.resp_type = MMC_RSP_R3;
+ cmd.cmdarg = 0;
+ cmd.flags = 0;
+
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+
+ if (err)
+ return err;
+
+ udelay(1000);
+
do {
cmd.cmdidx = MMC_CMD_SEND_OP_COND;
cmd.resp_type = MMC_RSP_R3;
- cmd.cmdarg = OCR_HCS | mmc->voltages;
+ cmd.cmdarg = (mmc_host_is_spi(mmc) ? 0 :
+ (mmc->voltages &
+ (cmd.response[0] & OCR_VOLTAGE_MASK)) |
+ (cmd.response[0] & OCR_ACCESS_MODE));
cmd.flags = 0;
err = mmc_send_cmd(mmc, &cmd, NULL);
@@ -333,6 +464,18 @@ int mmc_send_op_cond(struct mmc *mmc)
if (timeout <= 0)
return UNUSABLE_ERR;
+ if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
+ cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
+ cmd.resp_type = MMC_RSP_R3;
+ cmd.cmdarg = 0;
+ cmd.flags = 0;
+
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+
+ if (err)
+ return err;
+ }
+
mmc->version = MMC_VERSION_UNKNOWN;
mmc->ocr = cmd.response[0];
@@ -369,15 +512,23 @@ int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
{
struct mmc_cmd cmd;
+ int timeout = 1000;
+ int ret;
cmd.cmdidx = MMC_CMD_SWITCH;
cmd.resp_type = MMC_RSP_R1b;
cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
- (index << 16) |
- (value << 8);
+ (index << 16) |
+ (value << 8);
cmd.flags = 0;
- return mmc_send_cmd(mmc, &cmd, NULL);
+ ret = mmc_send_cmd(mmc, &cmd, NULL);
+
+ /* Waiting for the ready status */
+ mmc_send_status(mmc, timeout);
+
+ return ret;
+
}
int mmc_change_freq(struct mmc *mmc)
@@ -388,6 +539,9 @@ int mmc_change_freq(struct mmc *mmc)
mmc->card_caps = 0;
+ if (mmc_host_is_spi(mmc))
+ return 0;
+
/* Only version 4 supports high-speed */
if (mmc->version < MMC_VERSION_4)
return 0;
@@ -399,9 +553,6 @@ int mmc_change_freq(struct mmc *mmc)
if (err)
return err;
- if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])
- mmc->high_capacity = 1;
-
cardtype = ext_csd[196] & 0xf;
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
@@ -461,6 +612,9 @@ int sd_change_freq(struct mmc *mmc)
mmc->card_caps = 0;
+ if (mmc_host_is_spi(mmc))
+ return 0;
+
/* Read the SCR to find out if this card supports higher speeds */
cmd.cmdidx = MMC_CMD_APP_CMD;
cmd.resp_type = MMC_RSP_R1;
@@ -512,6 +666,9 @@ retry_scr:
break;
}
+ if (mmc->scr[0] & SD_DATA_4BIT)
+ mmc->card_caps |= MMC_MODE_4BIT;
+
/* Version 1.0 doesn't support switching */
if (mmc->version == SD_VERSION_1_0)
return 0;
@@ -529,9 +686,6 @@ retry_scr:
break;
}
- if (mmc->scr[0] & SD_DATA_4BIT)
- mmc->card_caps |= MMC_MODE_4BIT;
-
/* If high-speed isn't supported, we return */
if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
return 0;
@@ -549,7 +703,7 @@ retry_scr:
/* frequency bases */
/* divided by 10 to be nice to platforms without floating point */
-int fbase[] = {
+static const int fbase[] = {
10000,
100000,
1000000,
@@ -559,7 +713,7 @@ int fbase[] = {
/* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
* to platforms without floating point.
*/
-int multipliers[] = {
+static const int multipliers[] = {
0, /* reserved */
10,
12,
@@ -610,9 +764,24 @@ int mmc_startup(struct mmc *mmc)
u64 cmult, csize;
struct mmc_cmd cmd;
char ext_csd[512];
+ int timeout = 1000;
+
+#ifdef CONFIG_MMC_SPI_CRC_ON
+ if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
+ cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
+ cmd.resp_type = MMC_RSP_R1;
+ cmd.cmdarg = 1;
+ cmd.flags = 0;
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+
+ if (err)
+ return err;
+ }
+#endif
/* Put the Card in Identify Mode */
- cmd.cmdidx = MMC_CMD_ALL_SEND_CID;
+ cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
+ MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
cmd.resp_type = MMC_RSP_R2;
cmd.cmdarg = 0;
cmd.flags = 0;
@@ -629,18 +798,20 @@ int mmc_startup(struct mmc *mmc)
* For SD cards, get the Relatvie Address.
* This also puts the cards into Standby State
*/
- cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
- cmd.cmdarg = mmc->rca << 16;
- cmd.resp_type = MMC_RSP_R6;
- cmd.flags = 0;
+ if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
+ cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
+ cmd.cmdarg = mmc->rca << 16;
+ cmd.resp_type = MMC_RSP_R6;
+ cmd.flags = 0;
- err = mmc_send_cmd(mmc, &cmd, NULL);
+ err = mmc_send_cmd(mmc, &cmd, NULL);
- if (err)
- return err;
+ if (err)
+ return err;
- if (IS_SD(mmc))
- mmc->rca = (cmd.response[0] >> 16) & 0xffff;
+ if (IS_SD(mmc))
+ mmc->rca = (cmd.response[0] >> 16) & 0xffff;
+ }
/* Get the Card-Specific Data */
cmd.cmdidx = MMC_CMD_SEND_CSD;
@@ -650,6 +821,9 @@ int mmc_startup(struct mmc *mmc)
err = mmc_send_cmd(mmc, &cmd, NULL);
+ /* Waiting for the ready status */
+ mmc_send_status(mmc, timeout);
+
if (err)
return err;
@@ -716,14 +890,16 @@ int mmc_startup(struct mmc *mmc)
mmc->write_bl_len = 512;
/* Select the card, and put it into Transfer Mode */
- cmd.cmdidx = MMC_CMD_SELECT_CARD;
- cmd.resp_type = MMC_RSP_R1b;
- cmd.cmdarg = mmc->rca << 16;
- cmd.flags = 0;
- err = mmc_send_cmd(mmc, &cmd, NULL);
+ if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
+ cmd.cmdidx = MMC_CMD_SELECT_CARD;
+ cmd.resp_type = MMC_RSP_R1b;
+ cmd.cmdarg = mmc->rca << 16;
+ cmd.flags = 0;
+ err = mmc_send_cmd(mmc, &cmd, NULL);
- if (err)
- return err;
+ if (err)
+ return err;
+ }
if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
/* check ext_csd version and capacity */
diff --git a/drivers/mmc/mmc_spi.c b/drivers/mmc/mmc_spi.c
new file mode 100644
index 0000000..dc7574c
--- /dev/null
+++ b/drivers/mmc/mmc_spi.c
@@ -0,0 +1,280 @@
+/*
+ * generic mmc spi driver
+ *
+ * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
+ * Licensed under the GPL-2 or later.
+ */
+#include <common.h>
+#include <malloc.h>
+#include <part.h>
+#include <mmc.h>
+#include <spi.h>
+#include <crc.h>
+#include <linux/crc7.h>
+#include <linux/byteorder/swab.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)
+/* R1 bit 7 is always zero, reuse this bit for error */
+#define R1_SPI_ERROR (1 << 7)
+
+/* Response tokens used to ack each block written: */
+#define SPI_MMC_RESPONSE_CODE(x) ((x) & 0x1f)
+#define SPI_RESPONSE_ACCEPTED ((2 << 1)|1)
+#define SPI_RESPONSE_CRC_ERR ((5 << 1)|1)
+#define SPI_RESPONSE_WRITE_ERR ((6 << 1)|1)
+
+/* 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 */
+
+/* MMC SPI commands start with a start bit "0" and a transmit bit "1" */
+#define MMC_SPI_CMD(x) (0x40 | (x & 0x3f))
+
+/* 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 */
+
+/* timeout value */
+#define CTOUT 8
+#define RTOUT 3000000 /* 1 sec */
+#define WTOUT 3000000 /* 1 sec */
+
+static uint mmc_spi_sendcmd(struct mmc *mmc, ushort cmdidx, u32 cmdarg)
+{
+ struct spi_slave *spi = mmc->priv;
+ u8 cmdo[7];
+ u8 r1;
+ int i;
+ cmdo[0] = 0xff;
+ cmdo[1] = MMC_SPI_CMD(cmdidx);
+ cmdo[2] = cmdarg >> 24;
+ cmdo[3] = cmdarg >> 16;
+ 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;
+ }
+ debug("%s:cmd%d resp%d %x\n", __func__, cmdidx, i, r1);
+ return r1;
+}
+
+static uint mmc_spi_readdata(struct mmc *mmc, void *xbuf,
+ u32 bcnt, u32 bsize)
+{
+ struct spi_slave *spi = mmc->priv;
+ u8 *buf = xbuf;
+ u8 r1;
+ u16 crc;
+ int i;
+ while (bcnt--) {
+ for (i = 0; i < RTOUT; i++) {
+ spi_xfer(spi, 1 * 8, NULL, &r1, 0);
+ if (r1 != 0xff) /* data token */
+ break;
+ }
+ debug("%s:tok%d %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);
+#ifdef CONFIG_MMC_SPI_CRC_ON
+ if (swab16(cyg_crc16(buf, bsize)) != crc) {
+ debug("%s: CRC error\n", mmc->name);
+ r1 = R1_SPI_COM_CRC;
+ break;
+ }
+#endif
+ r1 = 0;
+ } else {
+ r1 = R1_SPI_ERROR;
+ break;
+ }
+ buf += bsize;
+ }
+ return r1;
+}
+
+static uint mmc_spi_writedata(struct mmc *mmc, const void *xbuf,
+ u32 bcnt, u32 bsize, int multi)
+{
+ struct spi_slave *spi = mmc->priv;
+ const u8 *buf = xbuf;
+ u8 r1;
+ u16 crc;
+ u8 tok[2];
+ int i;
+ tok[0] = 0xff;
+ tok[1] = multi ? SPI_TOKEN_MULTI_WRITE : SPI_TOKEN_SINGLE;
+ while (bcnt--) {
+#ifdef CONFIG_MMC_SPI_CRC_ON
+ crc = swab16(cyg_crc16((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);
+ if ((r1 & 0x10) == 0) /* response token */
+ break;
+ }
+ debug("%s:tok%d %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);
+ if (i && r1 == 0xff) {
+ r1 = 0;
+ break;
+ }
+ }
+ if (i == WTOUT) {
+ debug("%s:wtout %x\n", __func__, r1);
+ r1 = R1_SPI_ERROR;
+ break;
+ }
+ } else {
+ debug("%s: err %x\n", __func__, r1);
+ r1 = R1_SPI_COM_CRC;
+ break;
+ }
+ buf += bsize;
+ }
+ 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);
+ if (i && r1 == 0xff) {
+ r1 = 0;
+ break;
+ }
+ }
+ if (i == WTOUT) {
+ debug("%s:wstop %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 %x\n", __func__,
+ cmd->cmdidx, cmd->resp_type, cmd->cmdarg, cmd->flags);
+ spi_claim_bus(spi);
+ spi_cs_activate(spi);
+ r1 = mmc_spi_sendcmd(mmc, cmd->cmdidx, cmd->cmdarg);
+ if (r1 == 0xff) { /* no response */
+ ret = NO_CARD_ERR;
+ goto done;
+ } else if (r1 & R1_SPI_COM_CRC) {
+ ret = COMM_ERR;
+ goto done;
+ } else if (r1 & ~R1_SPI_IDLE) { /* other errors */
+ ret = TIMEOUT;
+ 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] = swab32(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] = swab32(cmd->response[0]);
+ debug("r32 %x\n", cmd->response[0]);
+ break;
+ }
+ } else {
+ debug("%s:data %x %x %x\n", __func__,
+ data->flags, data->blocks, data->blocksize);
+ if (data->flags == MMC_DATA_READ)
+ r1 = mmc_spi_readdata(mmc, 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 = COMM_ERR;
+ else if (r1) /* other errors */
+ ret = TIMEOUT;
+ }
+done:
+ spi_cs_deactivate(spi);
+ spi_release_bus(spi);
+ return ret;
+}
+
+static void mmc_spi_set_ios(struct mmc *mmc)
+{
+ struct spi_slave *spi = mmc->priv;
+ debug("%s: clock %u\n", __func__, mmc->clock);
+ if (mmc->clock)
+ spi_set_speed(spi, mmc->clock);
+}
+
+static int mmc_spi_init_p(struct mmc *mmc)
+{
+ struct spi_slave *spi = mmc->priv;
+ mmc->clock = 0;
+ 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 *mmc_spi_init(uint bus, uint cs, uint speed, uint mode)
+{
+ struct mmc *mmc;
+
+ mmc = malloc(sizeof(*mmc));
+ if (!mmc)
+ return NULL;
+ memset(mmc, 0, sizeof(*mmc));
+ mmc->priv = spi_setup_slave(bus, cs, speed, mode);
+ if (!mmc->priv) {
+ free(mmc);
+ return NULL;
+ }
+ sprintf(mmc->name, "MMC_SPI");
+ mmc->send_cmd = mmc_spi_request;
+ mmc->set_ios = mmc_spi_set_ios;
+ mmc->init = mmc_spi_init_p;
+ mmc->host_caps = MMC_MODE_SPI;
+
+ mmc->voltages = MMC_SPI_VOLTAGE;
+ mmc->f_max = speed;
+ mmc->f_min = MMC_SPI_MIN_CLOCK;
+ mmc->block_dev.part_type = PART_TYPE_DOS;
+
+ mmc_register(mmc);
+
+ return mmc;
+}
diff --git a/drivers/spi/cf_spi.c b/drivers/spi/cf_spi.c
index 722aafc..a883da9 100644
--- a/drivers/spi/cf_spi.c
+++ b/drivers/spi/cf_spi.c
@@ -49,6 +49,14 @@ extern void cfspi_release_bus(uint bus, uint cs);
DECLARE_GLOBAL_DATA_PTR;
+#ifndef CONFIG_SPI_IDLE_VAL
+#if defined(CONFIG_SPI_MMC)
+#define CONFIG_SPI_IDLE_VAL 0xFFFF
+#else
+#define CONFIG_SPI_IDLE_VAL 0x0
+#endif
+#endif
+
#if defined(CONFIG_CF_DSPI)
/* DSPI specific mode */
#define SPI_MODE_MOD 0x00200000
@@ -145,7 +153,7 @@ int cfspi_xfer(struct spi_slave *slave, uint bitlen, const void *dout,
}
if (din != NULL) {
- cfspi_tx(ctrl, 0);
+ cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL);
if (cfslave->charbit == 16)
*spi_rd16++ = cfspi_rx();
else
@@ -169,7 +177,7 @@ int cfspi_xfer(struct spi_slave *slave, uint bitlen, const void *dout,
}
if (din != NULL) {
- cfspi_tx(ctrl, 0);
+ cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL);
if (cfslave->charbit == 16)
*spi_rd16 = cfspi_rx();
else
@@ -177,7 +185,7 @@ int cfspi_xfer(struct spi_slave *slave, uint bitlen, const void *dout,
}
} else {
/* dummy read */
- cfspi_tx(ctrl, 0);
+ cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL);
cfspi_rx();
}
diff --git a/include/mmc.h b/include/mmc.h
index fcd0fd1..e0a56d9 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -44,6 +44,7 @@
#define MMC_MODE_HS_52MHz 0x010
#define MMC_MODE_4BIT 0x100
#define MMC_MODE_8BIT 0x200
+#define MMC_MODE_SPI 0x400
#define SD_DATA_4BIT 0x00040000
@@ -75,6 +76,8 @@
#define MMC_CMD_WRITE_SINGLE_BLOCK 24
#define MMC_CMD_WRITE_MULTIPLE_BLOCK 25
#define MMC_CMD_APP_CMD 55
+#define MMC_CMD_SPI_READ_OCR 58
+#define MMC_CMD_SPI_CRC_ON_OFF 59
#define SD_CMD_SEND_RELATIVE_ADDR 3
#define SD_CMD_SWITCH_FUNC 6
@@ -93,6 +96,12 @@
#define OCR_BUSY 0x80000000
#define OCR_HCS 0x40000000
+#define OCR_VOLTAGE_MASK 0x007FFF80
+#define OCR_ACCESS_MODE 0x60000000
+
+#define MMC_STATUS_MASK (~0x0206BF7F)
+#define MMC_STATUS_RDY_FOR_DATA (1<<8)
+#define MMC_STATUS_CURR_STATE (0xf<<9)
#define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */
#define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */
@@ -291,6 +300,8 @@ int board_mmc_getcd(u8 *cd, struct mmc *mmc);
#ifdef CONFIG_GENERIC_MMC
int atmel_mci_init(void *regs);
+#define mmc_host_is_spi(mmc) ((mmc)->host_caps & MMC_MODE_SPI)
+struct mmc *mmc_spi_init(uint bus, uint cs, uint speed, uint mode);
#else
int mmc_legacy_init(int verbose);
#endif
generated by cgit v1.1 at 2024-11-28 10:54:34 +0000