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Commit b9c7a17f authored by Chris Ball's avatar Chris Ball
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Rename extcsd read/write to writeprotect get/set 



This leaves "extcsd read" pointing to Giuseppe's code.  Also, abstract
out the writeprotect code so that there's only one shared implementation
in print_writeprotect_status(), used by both "extcsd read" and
"writeprotect get".
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent a5bf4a20
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Inline Side-by-side
mmc.c
View file @ b9c7a17f
......@@ -55,9 +55,14 @@ static struct Command commands[] = {
"Print extcsd data from <device>.",
NULL
},
{ do_write_extcsd, -1,
"extcsd write", "<device>\n"
"Write extcsd data to <device>.",
{ do_writeprotect_get, -1,
"writeprotect get", "<device>\n"
"Determine the eMMC writeprotect status of <device>.",
NULL
},
{ do_writeprotect_set, -1,
"writeprotect set", "<device>\n"
"Set the eMMC writeprotect status of <device>.",
NULL
},
{ 0, 0, 0, 0 }
......
mmc_cmds.c
View file @ b9c7a17f
......@@ -72,6 +72,102 @@ int write_extcsd_value(int fd, __u8 index, __u8 value)
return ret;
}
void print_writeprotect_status(__u8 *ext_csd)
{
__u8 reg;
__u8 ext_csd_rev = ext_csd[192];
/* A43: reserved [174:0] */
if (ext_csd_rev >= 5) {
printf("Boot write protection status registers"
" [BOOT_WP_STATUS]: 0x%02x\n", ext_csd[174]);
reg = ext_csd[EXT_CSD_BOOT_WP];
printf("Boot Area Write protection [BOOT_WP]: 0x%02x\n", reg);
printf(" Power ro locking: ");
if (reg & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
printf("not possible\n");
else
printf("possible\n");
printf(" Permanent ro locking: ");
if (reg & EXT_CSD_BOOT_WP_B_PERM_WP_DIS)
printf("not possible\n");
else
printf("possible\n");
printf(" ro lock status: ");
if (reg & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
printf("locked until next power on\n");
else if (reg & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
printf("locked permanently\n");
else
printf("not locked\n");
}
}
int do_writeprotect_get(int nargs, char **argv)
{
__u8 ext_csd[512];
int fd, ret;
char *device;
CHECK(nargs != 2, "Usage: mmc </path/to/mmcblkX>\n", exit(1));
device = argv[1];
fd = open(device, O_RDWR);
if (fd < 0) {
perror("open");
exit(1);
}
ret = read_extcsd(fd, ext_csd);
if (ret) {
fprintf(stderr, "Could not read EXT_CSD from %s\n", device);
exit(1);
}
print_writeprotect_status(ext_csd);
return ret;
}
int do_writeprotect_set(int nargs, char **argv)
{
__u8 ext_csd[512], value;
int fd, ret;
char *device;
CHECK(nargs != 2, "Usage: mmc </path/to/mmcblkX>\n", exit(1));
device = argv[1];
fd = open(device, O_RDWR);
if (fd < 0) {
perror("open");
exit(1);
}
ret = read_extcsd(fd, ext_csd);
if (ret) {
fprintf(stderr, "Could not read EXT_CSD from %s\n", device);
exit(1);
}
value = ext_csd[EXT_CSD_BOOT_WP] |
EXT_CSD_BOOT_WP_B_PWR_WP_EN;
ret = write_extcsd_value(fd, EXT_CSD_BOOT_WP, value);
if (ret) {
fprintf(stderr, "Could not write 0x%02x to "
"EXT_CSD[%d] in %s\n",
value, EXT_CSD_BOOT_WP, device);
exit(1);
}
return ret;
}
int do_read_extcsd(int nargs, char **argv)
{
__u8 ext_csd[512], ext_csd_rev, reg;
......@@ -133,13 +229,13 @@ int do_read_extcsd(int nargs, char **argv)
reg = ext_csd[EXT_CSD_S_CMD_SET];
printf("Card Supported Command sets [S_CMD_SET: 0x%02x]\n", reg);
if (!reg)
printf(" - Standard MMC coomand sets\n");
printf(" - Standard MMC command sets\n");
reg = ext_csd[EXT_CSD_HPI_FEATURE];
printf("HPI Features [HPI_FEATURE: 0x%02x]: ", reg);
if (reg & EXT_CSD_HPI_SUPP) {
if (reg & EXT_CSD_HPI_IMPL)
printf("implementationbased on CMD12\n");
printf("implementation based on CMD12\n");
else
printf("implementation based on CMD13\n");
}
......@@ -177,9 +273,8 @@ int do_read_extcsd(int nargs, char **argv)
/* A441: Reserved [501:247]
A43: reserved [246:229] */
if (ext_csd_rev >= 5) {
printf("Background operations status"
"[BKOPS_STATUS: 0x%02x]\n", ext_csd[246]);
" [BKOPS_STATUS: 0x%02x]\n", ext_csd[246]);
/* CORRECTLY_PRG_SECTORS_NUM [245:242] TODO */
......@@ -187,7 +282,6 @@ int do_read_extcsd(int nargs, char **argv)
" [INI_TIMEOUT_AP: 0x%02x]\n", ext_csd[241]);
/* A441: reserved [240] */
printf("Power class for 52MHz, DDR at 3.6V"
" [PWR_CL_DDR_52_360: 0x%02x]\n", ext_csd[239]);
printf("Power class for 52MHz, DDR at 1.95V"
......@@ -201,7 +295,7 @@ int do_read_extcsd(int nargs, char **argv)
printf("Power class for 200MHz, at 1.95V"
" [PWR_CL_200_195: 0x%02x]\n", ext_csd[236]);
}
printf("Minimum Performances for 8bit at 52MHz in DDR mode:\n");
printf("Minimum Performance for 8bit at 52MHz in DDR mode:\n");
printf(" [MIN_PERF_DDR_W_8_52: 0x%02x]\n", ext_csd[235]);
printf(" [MIN_PERF_DDR_R_8_52: 0x%02x]\n", ext_csd[234]);
/* A441: reserved [233] */
......@@ -346,34 +440,9 @@ int do_read_extcsd(int nargs, char **argv)
printf("High-density erase group definition"
" [ERASE_GROUP_DEF: 0x%02x]\n", ext_csd[175]);
/* A43: reserved [174:0] */
if (ext_csd_rev >= 5) {
printf("Boot write protection status registers"
" [BOOT_WP_STATUS]: 0x%02x\n", ext_csd[174]);
reg = ext_csd[EXT_CSD_BOOT_WP];
printf("Boot Area Write protection [BOOT_WP]: 0x%02x\n", reg);
printf(" Power ro locking: ");
if (reg & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
printf("not possible\n");
else
printf("possible\n");
printf(" Permanent ro locking: ");
if (reg & EXT_CSD_BOOT_WP_B_PERM_WP_DIS)
printf("not possible\n");
else
printf("possible\n");
printf(" ro lock status: ");
if (reg & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
printf("locked until next power on\n");
else if (reg &
EXT_CSD_BOOT_WP_B_PERM_WP_EN)
printf("locked permanently\n");
else
printf("not locked\n");
print_writeprotect_status(ext_csd);
if (ext_csd_rev >= 5) {
/* A441]: reserved [172] */
printf("User area write protection register"
" [USER_WP]: 0x%02x\n", ext_csd[171]);
......@@ -480,51 +549,11 @@ int do_read_extcsd(int nargs, char **argv)
" [PACKED_FAILURE_INDEX]: 0x%02x\n", ext_csd[35]);
printf("Power Off Notification"
" [POWER_OFF_NOTIFICATION]: 0x%02x\n", ext_csd[34]);
printf("Control to turn the Cache ON/OFF"
" [CACHE_CTRL]: 0x%02x\n", ext_csd[33]);
printf("Control to turn the Cache ON/OFF" " [CACHE_CTRL]: 0x%02x\n", ext_csd[33]);
/* flush_cache ext_csd[32] not readable */
/*Reserved [31:0] */
}
out_free:
return ret;
}
int do_write_extcsd(int nargs, char **argv)
{
__u8 ext_csd[512], value;
int fd, ret;
char *device;
if (nargs != 2) {
fprintf (stderr, "Usage: %s </path/to/mmcblkX>\n",
argv[0]);
exit (1);
}
device = argv[1];
fd = open(device, O_RDWR);
if (fd < 0) {
perror("open");
exit(1);
}
ret = read_extcsd(fd, ext_csd);
if (ret) {
fprintf(stderr, "Could not read EXT_CSD from %s\n", device);
exit(1);
}
value = ext_csd[EXT_CSD_BOOT_WP] |
EXT_CSD_BOOT_WP_B_PWR_WP_EN;
ret = write_extcsd_value(fd, EXT_CSD_BOOT_WP, value);
if (ret) {
fprintf(stderr, "Could not write 0x%02x to "
"EXT_CSD[%d] in %s\n",
value, EXT_CSD_BOOT_WP, device);
exit(1);
}
return ret;
}
mmc_cmds.h
View file @ b9c7a17f
......@@ -17,3 +17,5 @@
/* mmc_cmds.c */
int do_read_extcsd(int nargs, char **argv);
int do_write_extcsd(int nargs, char **argv);
int do_writeprotect_get(int nargs, char **argv);
int do_writeprotect_set(int nargs, char **argv);
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