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authorWolfgang Denk <wd@denx.de>2011-04-13 22:04:11 +0200
committerWolfgang Denk <wd@denx.de>2011-04-13 22:04:11 +0200
commitf16b608ae7d0c4611d3a41d2570616a498e64d4c (patch)
tree213c9f261e590c22f21683a619d997a895ada35b /common
parent107b56bdd8e82b07458df11f8df4a01067512281 (diff)
parent1c091f59a03af9f2e821cb054fd555a2748dd091 (diff)
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Merge branch 'sf' of git://git.denx.de/u-boot-blackfin
Diffstat (limited to 'common')
-rw-r--r--common/cmd_sf.c111
1 files changed, 75 insertions, 36 deletions
diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index 6e7be81..11a491d 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -19,6 +19,47 @@
static struct spi_flash *flash;
+
+/*
+ * This function computes the length argument for the erase command.
+ * The length on which the command is to operate can be given in two forms:
+ * 1. <cmd> offset len - operate on <'offset', 'len')
+ * 2. <cmd> offset +len - operate on <'offset', 'round_up(len)')
+ * If the second form is used and the length doesn't fall on the
+ * sector boundary, than it will be adjusted to the next sector boundary.
+ * If it isn't in the flash, the function will fail (return -1).
+ * Input:
+ * arg: length specification (i.e. both command arguments)
+ * Output:
+ * len: computed length for operation
+ * Return:
+ * 1: success
+ * -1: failure (bad format, bad address).
+ */
+static int sf_parse_len_arg(char *arg, ulong *len)
+{
+ char *ep;
+ char round_up_len; /* indicates if the "+length" form used */
+ ulong len_arg;
+
+ round_up_len = 0;
+ if (*arg == '+') {
+ round_up_len = 1;
+ ++arg;
+ }
+
+ len_arg = simple_strtoul(arg, &ep, 16);
+ if (ep == arg || *ep != '\0')
+ return -1;
+
+ if (round_up_len && flash->sector_size > 0)
+ *len = ROUND(len_arg - 1, flash->sector_size);
+ else
+ *len = len_arg;
+
+ return 1;
+}
+
static int do_spi_flash_probe(int argc, char * const argv[])
{
unsigned int bus = 0;
@@ -29,30 +70,30 @@ static int do_spi_flash_probe(int argc, char * const argv[])
struct spi_flash *new;
if (argc < 2)
- goto usage;
+ return -1;
cs = simple_strtoul(argv[1], &endp, 0);
if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
- goto usage;
+ return -1;
if (*endp == ':') {
if (endp[1] == 0)
- goto usage;
+ return -1;
bus = cs;
cs = simple_strtoul(endp + 1, &endp, 0);
if (*endp != 0)
- goto usage;
+ return -1;
}
if (argc >= 3) {
speed = simple_strtoul(argv[2], &endp, 0);
if (*argv[2] == 0 || *endp != 0)
- goto usage;
+ return -1;
}
if (argc >= 4) {
mode = simple_strtoul(argv[3], &endp, 16);
if (*argv[3] == 0 || *endp != 0)
- goto usage;
+ return -1;
}
new = spi_flash_probe(bus, cs, speed, mode);
@@ -65,14 +106,7 @@ static int do_spi_flash_probe(int argc, char * const argv[])
spi_flash_free(flash);
flash = new;
- printf("%u KiB %s at %u:%u is now current device\n",
- flash->size >> 10, flash->name, bus, cs);
-
return 0;
-
-usage:
- puts("Usage: sf probe [bus:]cs [hz] [mode]\n");
- return 1;
}
static int do_spi_flash_read_write(int argc, char * const argv[])
@@ -85,17 +119,17 @@ static int do_spi_flash_read_write(int argc, char * const argv[])
int ret;
if (argc < 4)
- goto usage;
+ return -1;
addr = simple_strtoul(argv[1], &endp, 16);
if (*argv[1] == 0 || *endp != 0)
- goto usage;
+ return -1;
offset = simple_strtoul(argv[2], &endp, 16);
if (*argv[2] == 0 || *endp != 0)
- goto usage;
+ return -1;
len = simple_strtoul(argv[3], &endp, 16);
if (*argv[3] == 0 || *endp != 0)
- goto usage;
+ return -1;
buf = map_physmem(addr, len, MAP_WRBACK);
if (!buf) {
@@ -116,10 +150,6 @@ static int do_spi_flash_read_write(int argc, char * const argv[])
}
return 0;
-
-usage:
- printf("Usage: sf %s addr offset len\n", argv[0]);
- return 1;
}
static int do_spi_flash_erase(int argc, char * const argv[])
@@ -130,14 +160,15 @@ static int do_spi_flash_erase(int argc, char * const argv[])
int ret;
if (argc < 3)
- goto usage;
+ return -1;
offset = simple_strtoul(argv[1], &endp, 16);
if (*argv[1] == 0 || *endp != 0)
- goto usage;
- len = simple_strtoul(argv[2], &endp, 16);
- if (*argv[2] == 0 || *endp != 0)
- goto usage;
+ return -1;
+
+ ret = sf_parse_len_arg(argv[2], &len);
+ if (ret != 1)
+ return -1;
ret = spi_flash_erase(flash, offset, len);
if (ret) {
@@ -146,24 +177,25 @@ static int do_spi_flash_erase(int argc, char * const argv[])
}
return 0;
-
-usage:
- puts("Usage: sf erase offset len\n");
- return 1;
}
static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
const char *cmd;
+ int ret;
/* need at least two arguments */
if (argc < 2)
goto usage;
cmd = argv[1];
+ --argc;
+ ++argv;
- if (strcmp(cmd, "probe") == 0)
- return do_spi_flash_probe(argc - 1, argv + 1);
+ if (strcmp(cmd, "probe") == 0) {
+ ret = do_spi_flash_probe(argc, argv);
+ goto done;
+ }
/* The remaining commands require a selected device */
if (!flash) {
@@ -172,9 +204,15 @@ static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[
}
if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0)
- return do_spi_flash_read_write(argc - 1, argv + 1);
- if (strcmp(cmd, "erase") == 0)
- return do_spi_flash_erase(argc - 1, argv + 1);
+ ret = do_spi_flash_read_write(argc, argv);
+ else if (strcmp(cmd, "erase") == 0)
+ ret = do_spi_flash_erase(argc, argv);
+ else
+ ret = -1;
+
+done:
+ if (ret != -1)
+ return ret;
usage:
return cmd_usage(cmdtp);
@@ -189,5 +227,6 @@ U_BOOT_CMD(
" `offset' to memory at `addr'\n"
"sf write addr offset len - write `len' bytes from memory\n"
" at `addr' to flash at `offset'\n"
- "sf erase offset len - erase `len' bytes from `offset'"
+ "sf erase offset [+]len - erase `len' bytes from `offset'\n"
+ " `+len' round up `len' to block size"
);