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iceprog: Add option that set QE=1 bit in SR2 

This is useful when testing litex SoC that rely on that bit being set

The setting is non-volatile so it only needs to be done once in case
you happen to have used a flash chip that's not by default QE=1

(This has been designed for winbond flash. Others might use
 different bit ...)

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This commit is contained in:
Sylvain Munaut 2020-03-26 09:44:57 +01:00
parent 83b8ef947f
commit 502d847b41
1 changed files with 40 additions and 5 deletions
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45
iceprog/iceprog.c
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@ -446,6 +446,34 @@ static void flash_disable_protection()
}
static void flash_enable_quad()
{
fprintf(stderr, "Enabling Quad operation...\n");
// Allow write
flash_write_enable();
// Write Status Register 2 <- 0x02
uint8_t data[2] = { FC_WSR2, 0x02 };
flash_chip_select();
mpsse_xfer_spi(data, 2);
flash_chip_deselect();
flash_wait();
// Read Status Register 1
data[0] = FC_RSR2;
flash_chip_select();
mpsse_xfer_spi(data, 2);
flash_chip_deselect();
if ((data[1] & 0x02) != 0x02)
fprintf(stderr, "failed to set QE=1, SR2 now equal to 0x%02x (expected 0x%02x)\n", data[1], data[1] | 0x02);
fprintf(stderr, "SR2: %08x\n", data[1]);
}
// ---------------------------------------------------------
// iceprog implementation
// ---------------------------------------------------------
@ -484,6 +512,7 @@ static void help(const char *progname)
fprintf(stderr, " -c do not write flash, only verify (`check')\n");
fprintf(stderr, " -S perform SRAM programming\n");
fprintf(stderr, " -t just read the flash ID sequence\n");
fprintf(stderr, " -Q just set the flash QE=1 bit\n");
fprintf(stderr, "\n");
fprintf(stderr, "Erase mode (only meaningful in default mode):\n");
fprintf(stderr, " [default] erase aligned chunks of 64kB in write mode\n");
@ -543,7 +572,7 @@ int main(int argc, char **argv)
bool bulk_erase = false;
bool dont_erase = false;
bool prog_sram = false;
bool test_mode = false;
int test_mode = 0;
bool slow_clock = false;
bool disable_protect = false;
bool disable_verify = false;
@ -565,7 +594,7 @@ int main(int argc, char **argv)
/* Decode command line parameters */
int opt;
char *endptr;
while ((opt = getopt_long(argc, argv, "d:i:I:rR:e:o:cbnStvspXk", long_options, NULL)) != -1) {
while ((opt = getopt_long(argc, argv, "d:i:I:rR:e:o:cbnStQvspXk", long_options, NULL)) != -1) {
switch (opt) {
case 'd': /* device string */
devstr = optarg;
@ -653,7 +682,10 @@ int main(int argc, char **argv)
prog_sram = true;
break;
case 't': /* just read flash id */
test_mode = true;
test_mode = 1;
break;
case 'Q': /* just read flash id */
test_mode = 2;
break;
case 'v': /* provide verbose output */
verbose = true;
@ -682,7 +714,7 @@ int main(int argc, char **argv)
/* Make sure that the combination of provided parameters makes sense */
if (read_mode + erase_mode + check_mode + prog_sram + test_mode > 1) {
if (read_mode + erase_mode + check_mode + prog_sram + !!test_mode > 1) {
fprintf(stderr, "%s: options `-r'/`-R', `-e`, `-c', `-S', and `-t' are mutually exclusive\n", my_name);
return EXIT_FAILURE;
}
@ -840,7 +872,10 @@ int main(int argc, char **argv)
flash_reset();
flash_power_up();
flash_read_id();
if (test_mode == 1)
flash_read_id();
else
flash_enable_quad();
flash_power_down();