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cmd-spi: Add binary mode for flashrom

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In order to improve reliability, add a binary mode for interacting
with the SPI chip.  This lets us hook up flashrom.

Signed-off-by: Sean Cross <xobs@kosagi.com>
This commit is contained in:
Sean Cross 2015-02-04 21:28:29 +08:00
parent 7fd6d1d093
commit fb9c876148
1 changed files with 28 additions and 1 deletions
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29
cmd-spi.c
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@ -4,6 +4,29 @@
#include "printf.h"
#include "spi.h"
static int do_flashrom(void)
{
uint8_t out_count;
uint8_t in_count;
uint8_t out[256];
uint8_t in[256];
serial_putc(0x05);
(void)serial_getc(); // Dummy read, necessary for some reason
while (1) {
out_count = serial_getc();
in_count = serial_getc();
if ((!in_count) && (!out_count))
return 0;
serial_read(out, out_count);
spi_cmd_txrx(out_count, in_count, out, in);
serial_write(in, in_count);
}
}
int cmd_spi(int argc, char **argv)
{
uint32_t recv_bytes_count;
@ -21,13 +44,17 @@ int cmd_spi(int argc, char **argv)
return 0;
}
if (argc > 0 && !_strcasecmp(argv[0], "flashrom"))
return do_flashrom();
if (argc < 2) {
printf("Send SPI bytes out and read the response.\n");
printf("Usage:\n");
printf(" spi [count] [byte 1] [byte 2] ...\n");
printf(" Where \"count\" is the number of bytes to expect"
" in response.\n");
printf(" spi id -- get device id\n");
printf(" spi id get device id\n");
printf(" spi flashrom enter 'flashrom' prog mode\n");
return 1;
}