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Multibyte SPI write for the Bus Pirate

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Corresponding to flashrom svn r964.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Sean Nelson <audiohacked@gmail.com>
This commit is contained in:
Carl-Daniel Hailfinger 2010-03-22 03:30:58 +00:00
parent 50415d2e48
commit 408e47af32
3 changed files with 38 additions and 2 deletions
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37
buspirate_spi.c
View File

@ -316,4 +316,39 @@ int buspirate_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len
return spi_read_chunked(flash, buf, start, len, 12); return spi_read_chunked(flash, buf, start, len, 12);
} }
/* We could do 12-byte writes, but for now we use the generic 1-byte code. */ int buspirate_spi_write_256(struct flashchip *flash, uint8_t *buf)
{
int total_size = 1024 * flash->total_size;
int i;
spi_disable_blockprotect();
/* Erase first. */
msg_pinfo("Erasing flash before programming... ");
if (erase_flash(flash)) {
msg_perr("ERASE FAILED!\n");
return -1;
}
msg_pinfo("done.\n");
/* FIXME: We could do 12 byte writes, but then we'd have to make sure
* not to cross a 256 byte page boundary. This problem only applies to
* writes, reads can cross page boundaries just fine.
*/
for (i = 0; i < total_size; i += 8) {
int l, r;
if (i + 8 <= total_size)
l = 8;
else
l = total_size - i;
if ((r = spi_nbyte_program(i, &buf[i], l))) {
msg_perr("%s: write fail %d\n", __func__, r);
return 1;
}
while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP)
/* loop */;
}
return 0;
}

1
flash.h
View File

@ -504,6 +504,7 @@ int buspirate_spi_init(void);
int buspirate_spi_shutdown(void); int buspirate_spi_shutdown(void);
int buspirate_spi_send_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr); int buspirate_spi_send_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr);
int buspirate_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len); int buspirate_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len);
int buspirate_spi_write_256(struct flashchip *flash, uint8_t *buf);
/* dediprog.c */ /* dediprog.c */
int dediprog_init(void); int dediprog_init(void);

2
spi.c
View File

@ -108,7 +108,7 @@ const struct spi_programmer spi_programmer[] = {
.command = buspirate_spi_send_command, .command = buspirate_spi_send_command,
.multicommand = default_spi_send_multicommand, .multicommand = default_spi_send_multicommand,
.read = buspirate_spi_read, .read = buspirate_spi_read,
.write_256 = spi_chip_write_1, .write_256 = buspirate_spi_write_256,
}, },
#endif #endif