mmc.h
36a37,45
> #define MMC_ERASE_GROUP_START 35 /* ac [31:0] data addr R1 */
> #define MMC_ERASE_GROUP_END 36 /* ac [31:0] data addr R1 */
> #define MMC_ERASE 38 /* ac [31] Secure request
> [30:16] set to 0
> [15] Force Garbage
Collect request4
> [14:2] set to 0
> [1] Discard Enable
> [0] Identify Write
Blocks for Erase (or TRIM Enable)
> R1b */
mmc_cmds.h
33a34
> int do_erase(int nargs, char **argv);
mmc_cmds.c
226a227,291
> int erase(int fd, __u32 argin, __u32 start, __u32 end)
> {
> int ret = 0;
> struct mmc_ioc_cmd idata;
> __u32 response;
>
> // Set Start address
> memset(&idata, 0, sizeof(idata));
> idata.opcode = MMC_ERASE_GROUP_START;
> idata.arg = start;
> idata.flags = MMC_RSP_R1 | MMC_CMD_AC;
> ret = ioctl(fd, MMC_IOC_CMD, &idata);
> if (ret) {
> perror("ioctl");
> printf("Erase Group Start Address command failed\n");
> return ret;
> }
> ret = send_status(fd, &response);
> if (response & 0xFFF900C0) {
> printf("CMD13 returns: 0x%08x during CMD35\n", response);
> }
>
> // Set end address
> memset(&idata, 0, sizeof(idata));
> idata.opcode = MMC_ERASE_GROUP_END;
> idata.arg = end;
> idata.flags = MMC_RSP_R1 | MMC_CMD_AC;
> ret = ioctl(fd, MMC_IOC_CMD, &idata);
> if (ret) {
> perror("ioctl");
> printf("Erase Group End Address command failed\n");
> return ret;
> }
> ret = send_status(fd, &response);
> if (response & 0xFFF900C0)
> printf("CMD13 returns: 0x%08x during CMD36\n", response);
>
> // Send Erase Command
> memset(&idata, 0, sizeof(idata));
> idata.opcode = MMC_ERASE;
> idata.arg = argin;
> idata.cmd_timeout_ms = 60000;
> idata.data_timeout_ns = 60000000;
> idata.flags = MMC_RSP_R1B | MMC_CMD_AC;
> ret = ioctl(fd, MMC_IOC_CMD, &idata);
> if (ret) {
> perror("ioctl");
> printf("Erase command failed\n");
> return ret;
> }
>
> // Send Status Command
> // 1098 7654 3210 9876 5432 1098 7654 3210
> // 3322 2222 2222 1111 1111 1100 0000 0000
> // 1111 1111 1111 1xx1 xxxx xxxx 11xx xxxx Device Status Error bits
> // F F F 9 0 0 C 0 0xFFF900C0
> ret = send_status(fd, &response);
> if (response & 0xFFF900C0)
> printf("CMD13 returns: 0x%08x during CMD38\n", response);
> if (ret)
> printf("Send Status Command returned 0x%08X\n", response);
>
> return ret;
> }
>
1150a1216
>
1842a1909,1985
>
>
>
> int do_erase(int nargs, char **argv)
> {
> int fd, ret;
> char *device;
> char **eptr=NULL;
> __u32 argin, start, end;
>
>
> if (nargs != 5) {
> fprintf(stderr, "Usage: mmc erase <arg> <start address> <end
address> </path/to/mmcblkX>\n");
> exit(1);
> }
>
> if ((argv[1][0] == '0') && (argv[1][1] == 'x'))
> argin = strtol(argv[1], eptr, 16);
> else
> argin = strtol(argv[1], eptr, 10);
> if ((argv[2][0] == '0') && (argv[2][1] == 'x'))
> start = strtol(argv[2], eptr, 16);
> else
> start = strtol(argv[2], eptr, 10);
> if ((argv[3][0] == '0') && (argv[3][1] == 'x'))
> end = strtol(argv[3], eptr, 16);
> else
> end = strtol(argv[3], eptr, 10);
> device = argv[4];
>
> fd = open(device, O_RDWR);
> if (fd < 0) {
> perror("open");
> exit(1);
> }
>
> printf("Executing (0x%08X): ", argin);
> switch(argin) {
> case 0x00000000:
> printf("Erase ");
> break;
> case 0x00000003:
> printf("Discard ");
> break;
> case 0x80000000:
> printf("Secure Erase ");
> break;
> case 0x80008000:
> printf("Secure Trim Step 2 ");
> break;
> case 0x80000001:
> printf("Secure Trim Step 1 ");
> break;
> case 0x00000001:
> printf("Trim ");
> break;
> default:
> printf("Unknown Argument ");
> }
> printf("From:0x%08X To:0x%08X\n", start, end);
>
> ret = erase(fd, argin, start, end);
> if (ret) {
> fprintf(stderr, "Error in Erase Command to %s with Arg=0x%08X
Start=0x%08X End=0x%08X\n",
> device,
> argin,
> start,
> end);
> exit(1);
> }
>
> return ret;
>
> }
>
>
>
mmc.c
29c29
< #define MMC_VERSION "0.1"
---
> #define MMC_VERSION "0.1_KS"
135a136,140
> NULL
> },
> { do_erase, -4,
> "erase", "<arg> " "<start address> " "<end address> " "<device>\n"
> "Send Erase command to the <device>.\nThis will delete all
user data in the specified region of the device.",
