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authorFurquan Shaikh <furquan@chromium.org>2016-11-17 20:38:07 -0800
committerFurquan Shaikh <furquan@google.com>2016-11-22 17:37:57 +0100
commitd2fb6ae813880b8fd1b3983e0e61c7e51fb9b20b (patch)
treece8dcf60dd013444448e2be2ef6d52c7179ceac2 /src/drivers/spi
parentdc34fb60b4151a7fad3882cc85dac4379f2d8dd8 (diff)
downloadcoreboot-d2fb6ae813880b8fd1b3983e0e61c7e51fb9b20b.tar.xz
spi: Get rid of flash_programmer_probe in spi_slave structure
flash_programmer_probe is a property of the spi flash driver and does not belong in the spi_slave structure. Thus, make spi_flash_programmer_probe a callback from the spi_flash_probe function. Logic still remains the same as before (order matters): 1. Try spi_flash_programmer_probe without force option 2. Try generic flash probing 3. Try spi_flash_programmer_probe with force option If none of the above steps work, fail probing. Flash controller is expected to honor force option to decide whether to perform specialized probing or to defer to generic probing. BUG=None BRANCH=None TEST=Compiles successfully Change-Id: I4163593eea034fa044ec2216e56d0ea3fbc86c7d Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17465 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/drivers/spi')
-rw-r--r--src/drivers/spi/spi_flash.c81
1 files changed, 46 insertions, 35 deletions
diff --git a/src/drivers/spi/spi_flash.c b/src/drivers/spi/spi_flash.c
index baa1f1aeab..b2fdab9f2d 100644
--- a/src/drivers/spi/spi_flash.c
+++ b/src/drivers/spi/spi_flash.c
@@ -296,46 +296,39 @@ static struct {
};
#define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN)
+struct spi_flash *
+__attribute__((weak)) spi_flash_programmer_probe(struct spi_slave *spi,
+ int force)
+{
+ /* Default weak implementation. Do nothing. */
+ return NULL;
+}
-/* Public API implementations. */
-struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs)
+static struct spi_flash *__spi_flash_probe(struct spi_slave *spi)
{
- struct spi_slave *spi;
- struct spi_flash *flash = NULL;
int ret, i, shift;
u8 idcode[IDCODE_LEN], *idp;
-
- spi = spi_setup_slave(bus, cs);
- if (!spi) {
- printk(BIOS_WARNING, "SF: Failed to set up slave\n");
- return NULL;
- }
-
- if (spi->force_programmer_specific && spi->programmer_specific_probe) {
- flash = spi->programmer_specific_probe (spi);
- if (!flash)
- goto err_read_id;
- goto flash_detected;
- }
+ struct spi_flash *flash = NULL;
/* Read the ID codes */
ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
if (ret)
- goto err_read_id;
+ return NULL;
-#if CONFIG_DEBUG_SPI_FLASH
- printk(BIOS_SPEW, "SF: Got idcode: ");
- for (i = 0; i < sizeof(idcode); i++)
- printk(BIOS_SPEW, "%02x ", idcode[i]);
- printk(BIOS_SPEW, "\n");
-#endif
+ if (IS_ENABLED(CONFIG_DEBUG_SPI_FLASH)) {
+ printk(BIOS_SPEW, "SF: Got idcode: ");
+ for (i = 0; i < sizeof(idcode); i++)
+ printk(BIOS_SPEW, "%02x ", idcode[i]);
+ printk(BIOS_SPEW, "\n");
+ }
/* count the number of continuation bytes */
- for (shift = 0, idp = idcode;
- shift < IDCODE_CONT_LEN && *idp == 0x7f;
+ for (shift = 0, idp = idcode; shift < IDCODE_CONT_LEN && *idp == 0x7f;
++shift, ++idp)
continue;
+ printk(BIOS_INFO, "Manufacturer: %02x\n", *idp);
+
/* search the table for matches in shift and id */
for (i = 0; i < ARRAY_SIZE(flashes); ++i)
if (flashes[i].shift == shift && flashes[i].idcode == *idp) {
@@ -345,15 +338,37 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs)
break;
}
- if (!flash && spi->programmer_specific_probe) {
- flash = spi->programmer_specific_probe (spi);
+ return flash;
+}
+
+struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs)
+{
+ struct spi_slave *spi;
+ struct spi_flash *flash;
+
+ spi = spi_setup_slave(bus, cs);
+ if (!spi) {
+ printk(BIOS_WARNING, "SF: Failed to set up slave\n");
+ return NULL;
}
+
+ /* Try special programmer probe if any (without force). */
+ flash = spi_flash_programmer_probe(spi, 0);
+
+ /* If flash is not found, try generic spi flash probe. */
+ if (!flash)
+ flash = __spi_flash_probe(spi);
+
+ /* If flash is not yet found, force special programmer probe if any. */
+ if (!flash)
+ flash = spi_flash_programmer_probe(spi, 1);
+
+ /* Give up -- nothing more to try if flash is not found. */
if (!flash) {
- printk(BIOS_WARNING, "SF: Unsupported manufacturer %02x\n", *idp);
- goto err_manufacturer_probe;
+ printk(BIOS_WARNING, "SF: Unsupported manufacturer!\n");
+ return NULL;
}
-flash_detected:
printk(BIOS_INFO, "SF: Detected %s with sector size 0x%x, total 0x%x\n",
flash->name, flash->sector_size, flash->size);
@@ -366,10 +381,6 @@ flash_detected:
spi_flash_dev = flash;
return flash;
-
-err_manufacturer_probe:
-err_read_id:
- return NULL;
}
int spi_flash_read(const struct spi_flash *flash, u32 offset, size_t len,