Message ID | 1297888074-8344-3-git-send-email-RichardRetanubun@RuggedCom.com |
---|---|
State | Superseded |
Headers | show |
Dear Richard Retanubun, In message <1297888074-8344-3-git-send-email-RichardRetanubun@RuggedCom.com> you wrote: > This patch adds [+]len handler for the erase command that will > automatically round up the requested erase length to the flash's > sector_size. > --- > common/cmd_sf.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++---- > 1 files changed, 49 insertions(+), 4 deletions(-) Please run your patches through checkpatch - this helps avoiding the frustration of seeing rejects due to simple issues like these: ERROR: Missing Signed-off-by: line(s) > + if (*arg == '+'){ ERROR: space required before the open brace '{' > + if (ret != 1) { > goto usage; > + } WARNING: braces {} are not necessary for single statement blocks Best regards, Wolfgang Denk
On Wed, 16 Feb 2011 15:27:54 -0500 Richard Retanubun <RichardRetanubun@ruggedcom.com> wrote: > This patch adds [+]len handler for the erase command that will > automatically round up the requested erase length to the flash's > sector_size. > --- > common/cmd_sf.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++---- > 1 files changed, 49 insertions(+), 4 deletions(-) > > diff --git a/common/cmd_sf.c b/common/cmd_sf.c > index 6e7be81..bbd4842 100644 > --- a/common/cmd_sf.c > +++ b/common/cmd_sf.c > @@ -19,6 +19,48 @@ > > 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). On NOR, + is used to indicate that the second argument is a length, as opposed to an ending address. Rounding seems like a side effect of length mode. On NAND we unconditionally round up erase lengths, as we don't support ending-address mode (looks like SPI doesn't either). -Scott
diff --git a/common/cmd_sf.c b/common/cmd_sf.c index 6e7be81..bbd4842 100644 --- a/common/cmd_sf.c +++ b/common/cmd_sf.c @@ -19,6 +19,48 @@ 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 = DIV_ROUND_UP(len_arg, flash->sector_size); + else + *len = len_arg; + + return 1; +} + static int do_spi_flash_probe(int argc, char * const argv[]) { unsigned int bus = 0; @@ -135,9 +177,11 @@ static int do_spi_flash_erase(int argc, char * const argv[]) 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) + + ret = sf_parse_len_arg(argv[2], &len); + if (ret != 1) { goto usage; + } ret = spi_flash_erase(flash, offset, len); if (ret) { @@ -148,7 +192,7 @@ static int do_spi_flash_erase(int argc, char * const argv[]) return 0; usage: - puts("Usage: sf erase offset len\n"); + puts("Usage: sf erase offset [+]len\n"); return 1; } @@ -189,5 +233,6 @@ 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" );