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drivers/spi/winbond: Fix read protection bits 

Don't care about SRPx and print correct protected range.

Change-Id: I051f1459c585a7ed6a4878dc217d11df5ef00d74
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/28731
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Patrick Rudolph 2018-09-25 14:26:33 +02:00 committed by Patrick Rudolph
parent 339ae162b6
commit 87471366e4
1 changed files with 7 additions and 8 deletions
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15
src/drivers/spi/winbond.c
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@ -293,12 +293,10 @@ static int winbond_get_write_protection(const struct spi_flash *flash,
const size_t granularity = (1 << params->protection_granularity_shift);
if (params->bp_bits == 3) {
union status_reg1_bp3 reg1_bp3;
union status_reg1_bp3 reg1_bp3 = { .u = 0 };
ret = spi_flash_cmd(&flash->spi, flash->status_cmd, &reg1_bp3.u,
sizeof(reg1_bp3.u));
if (ret)
return ret;
if (reg1_bp3.sec) {
// FIXME: not supported
@ -308,12 +306,10 @@ static int winbond_get_write_protection(const struct spi_flash *flash,
bp = reg1_bp3.bp;
tb = reg1_bp3.tb;
} else if (params->bp_bits == 4) {
union status_reg1_bp4 reg1_bp4;
union status_reg1_bp4 reg1_bp4 = { .u = 0 };
ret = spi_flash_cmd(&flash->spi, flash->status_cmd, &reg1_bp4.u,
sizeof(reg1_bp4.u));
if (ret)
return ret;
bp = reg1_bp4.bp;
tb = reg1_bp4.tb;
@ -321,6 +317,8 @@ static int winbond_get_write_protection(const struct spi_flash *flash,
// FIXME: not supported
return -1;
}
if (ret)
return ret;
ret = spi_flash_cmd(&flash->spi, CMD_W25_RDSR2, &reg2.u,
sizeof(reg2.u));
@ -330,14 +328,15 @@ static int winbond_get_write_protection(const struct spi_flash *flash,
winbond_bpbits_to_region(granularity, bp, tb, reg2.cmp, flash->size,
&wp_region);
if (!reg2.srp1 || !wp_region.size) {
if (!region_sz(&wp_region)) {
printk(BIOS_DEBUG, "WINBOND: flash isn't protected\n");
return 0;
}
printk(BIOS_DEBUG, "WINBOND: flash protected range 0x%08zx-0x%08zx\n",
wp_region.offset, wp_region.size);
region_offset(&wp_region),
region_offset(&wp_region) + region_sz(&wp_region));
return region_is_subregion(&wp_region, region);
}