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openwrt-packages/utils/mmc-utils/patches/0009-mmc-utils-let-FFU-mode...

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From f54f401085e011e6f9c7b120aa1794b19c32b493 Mon Sep 17 00:00:00 2001
From: "Shivamurthy Shastri (sshivamurthy)" <sshivamurthy@micron.com>
Date: Wed, 10 Apr 2019 13:38:08 +0000
Subject: [PATCH] mmc-utils: let FFU mode use CMD23 and CMD25
As per specification, the host can use either CMD24 or CMD25 in
closed-ended or open-ended way.
CMD25 is better option as it can flash the firmware image in one go.
Signed-off-by: Shivamurthy Shastri <sshivamurthy@micron.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
---
mmc.h | 2 ++
mmc_cmds.c | 70 ++++++++++++++++++++++++++++++------------------------
2 files changed, 41 insertions(+), 31 deletions(-)
--- a/mmc.h
+++ b/mmc.h
@@ -25,10 +25,12 @@
/* From kernel linux/mmc/mmc.h */
#define MMC_SWITCH 6 /* ac [31:0] See below R1b */
#define MMC_SEND_EXT_CSD 8 /* adtc R1 */
+#define MMC_STOP_TRANSMISSION 12 /* ac R1b */
#define MMC_SEND_STATUS 13 /* ac [31:16] RCA R1 */
#define R1_SWITCH_ERROR (1 << 7) /* sx, c */
#define MMC_SWITCH_MODE_WRITE_BYTE 0x03 /* Set target to value */
#define MMC_READ_MULTIPLE_BLOCK 18 /* adtc [31:0] data addr R1 */
+#define MMC_SET_BLOCK_COUNT 23 /* adtc [31:0] data addr R1 */
#define MMC_WRITE_BLOCK 24 /* adtc [31:0] data addr R1 */
#define MMC_WRITE_MULTIPLE_BLOCK 25 /* adtc R1 */
#define MMC_SET_WRITE_PROT 28 /* ac [31:0] data addr R1b */
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -2456,12 +2456,13 @@ int do_ffu(int nargs, char **argv)
int sect_done = 0, retry = 3, ret = -EINVAL;
unsigned int sect_size;
__u8 ext_csd[512];
- __u8 *buf;
+ __u8 *buf = NULL;
__u32 arg;
off_t fw_size;
ssize_t chunk_size;
char *device;
- struct mmc_ioc_multi_cmd *multi_cmd;
+ struct mmc_ioc_multi_cmd *multi_cmd = NULL;
+ __u32 blocks = 1;
if (nargs != 3) {
fprintf(stderr, "Usage: ffu <image name> </path/to/mmcblkX> \n");
@@ -2481,14 +2482,6 @@ int do_ffu(int nargs, char **argv)
exit(1);
}
- buf = malloc(512);
- multi_cmd = calloc(1, sizeof(struct mmc_ioc_multi_cmd) +
- 3 * sizeof(struct mmc_ioc_cmd));
- if (!buf || !multi_cmd) {
- perror("failed to allocate memory");
- goto out;
- }
-
ret = read_extcsd(dev_fd, ext_csd);
if (ret) {
fprintf(stderr, "Could not read EXT_CSD from %s\n", device);
@@ -2513,9 +2506,17 @@ int do_ffu(int nargs, char **argv)
}
fw_size = lseek(img_fd, 0, SEEK_END);
+ if (fw_size > MMC_IOC_MAX_BYTES || fw_size == 0) {
+ fprintf(stderr, "Wrong firmware size");
+ goto out;
+ }
- if (fw_size == 0) {
- fprintf(stderr, "Firmware image is empty");
+ /* allocate maximum required */
+ buf = malloc(fw_size);
+ multi_cmd = calloc(1, sizeof(struct mmc_ioc_multi_cmd) +
+ 4 * sizeof(struct mmc_ioc_cmd));
+ if (!buf || !multi_cmd) {
+ perror("failed to allocate memory");
goto out;
}
@@ -2525,14 +2526,19 @@ int do_ffu(int nargs, char **argv)
goto out;
}
+ /* calculate required fw blocks for CMD25 */
+ blocks = fw_size / sect_size;
+
/* set CMD ARG */
arg = ext_csd[EXT_CSD_FFU_ARG_0] |
ext_csd[EXT_CSD_FFU_ARG_1] << 8 |
ext_csd[EXT_CSD_FFU_ARG_2] << 16 |
ext_csd[EXT_CSD_FFU_ARG_3] << 24;
+ /* prepare multi_cmd for FFU based on cmd to be used */
+
/* prepare multi_cmd to be sent */
- multi_cmd->num_of_cmds = 3;
+ multi_cmd->num_of_cmds = 4;
/* put device into ffu mode */
multi_cmd->cmds[0].opcode = MMC_SWITCH;
@@ -2543,37 +2549,42 @@ int do_ffu(int nargs, char **argv)
multi_cmd->cmds[0].flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
multi_cmd->cmds[0].write_flag = 1;
+ /* send block count */
+ multi_cmd->cmds[1].opcode = MMC_SET_BLOCK_COUNT;
+ multi_cmd->cmds[1].arg = blocks;
+ multi_cmd->cmds[1].flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+
/* send image chunk */
- multi_cmd->cmds[1].opcode = MMC_WRITE_BLOCK;
- multi_cmd->cmds[1].blksz = sect_size;
- multi_cmd->cmds[1].blocks = 1;
- multi_cmd->cmds[1].arg = arg;
- multi_cmd->cmds[1].flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
- multi_cmd->cmds[1].write_flag = 1;
- mmc_ioc_cmd_set_data(multi_cmd->cmds[1], buf);
+ multi_cmd->cmds[2].opcode = MMC_WRITE_MULTIPLE_BLOCK;
+ multi_cmd->cmds[2].blksz = sect_size;
+ multi_cmd->cmds[2].blocks = blocks;
+ multi_cmd->cmds[2].arg = arg;
+ multi_cmd->cmds[2].flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+ multi_cmd->cmds[2].write_flag = 1;
+ mmc_ioc_cmd_set_data(multi_cmd->cmds[2], buf);
/* return device into normal mode */
- multi_cmd->cmds[2].opcode = MMC_SWITCH;
- multi_cmd->cmds[2].arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+ multi_cmd->cmds[3].opcode = MMC_SWITCH;
+ multi_cmd->cmds[3].arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
(EXT_CSD_MODE_CONFIG << 16) |
(EXT_CSD_NORMAL_MODE << 8) |
EXT_CSD_CMD_SET_NORMAL;
- multi_cmd->cmds[2].flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
- multi_cmd->cmds[2].write_flag = 1;
+ multi_cmd->cmds[3].flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+ multi_cmd->cmds[3].write_flag = 1;
do_retry:
/* read firmware chunk */
lseek(img_fd, 0, SEEK_SET);
- chunk_size = read(img_fd, buf, 512);
+ chunk_size = read(img_fd, buf, fw_size);
- while (chunk_size > 0) {
+ if (chunk_size > 0) {
/* send ioctl with multi-cmd */
ret = ioctl(dev_fd, MMC_IOC_MULTI_CMD, multi_cmd);
if (ret) {
perror("Multi-cmd ioctl");
/* In case multi-cmd ioctl failed before exiting from ffu mode */
- ioctl(dev_fd, MMC_IOC_CMD, &multi_cmd->cmds[2]);
+ ioctl(dev_fd, MMC_IOC_CMD, &multi_cmd->cmds[3]);
goto out;
}
@@ -2600,9 +2611,6 @@ do_retry:
} else {
fprintf(stderr, "Programmed %d/%jd bytes\r", sect_done * sect_size, (intmax_t)fw_size);
}
-
- /* read the next firmware chunk (if any) */
- chunk_size = read(img_fd, buf, 512);
}
if ((sect_done * sect_size) == fw_size) {
@@ -2639,7 +2647,7 @@ do_retry:
if (ret) {
perror("Multi-cmd ioctl failed setting install mode");
/* In case multi-cmd ioctl failed before exiting from ffu mode */
- ioctl(dev_fd, MMC_IOC_CMD, &multi_cmd->cmds[2]);
+ ioctl(dev_fd, MMC_IOC_CMD, &multi_cmd->cmds[3]);
goto out;
}
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