drivers/spi/spi_flash: organize spi flash by sector topology

By grouping the spi flash parts by their {vendor, sector topology}
tuple one can use a common probe function for looking up the part
instead of having per-vendor probe functions. Additionally, by
grouping by the command set one can save more space as well. SST
is the exception that requires after_probe() function to unlock the
parts.

2KiB of savings in each of verstage, romstage, and ramstage
on Aleena Chrome OS Build.

Change-Id: I9cc20ca0f3d0a1b97154b000c95ff2e7e87f3375
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38379
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

1 files changed, 8 insertions, 47 deletions

diff --git a/src/drivers/spi/atmel.c b/src/drivers/spi/atmel.c
index a49484464e..ae282c323b 100644
--- a/src/drivers/spi/atmel.c
+++ b/src/drivers/spi/atmel.c
@@ -39,84 +39,45 @@ static const struct spi_flash_part_id flash_table[] = {
 		.id			= 0x3015,
 		.name			= "AT25X16",
 		.nr_sectors_shift	= 9,
-		.sector_size_kib_shift	= 2,
 	},
 	{
 		.id			= 0x47,
 		.name			= "AT25DF32",
 		.nr_sectors_shift	= 10,
-		.sector_size_kib_shift	= 2,
 	},
 	{
 		.id			= 0x3017,
 		.name			= "AT25X64",
 		.nr_sectors_shift	= 11,
-		.sector_size_kib_shift	= 2,
 	},
 	{
 		.id			= 0x4015,
 		.name			= "AT25Q16",
 		.nr_sectors_shift	= 9,
-		.sector_size_kib_shift	= 2,
 	},
 	{
 		.id			= 0x4016,
 		.name			= "AT25Q32",
 		.nr_sectors_shift	= 10,
-		.sector_size_kib_shift	= 2,
 	},
 	{
 		.id			= 0x4017,
 		.name			= "AT25Q64",
 		.nr_sectors_shift	= 11,
-		.sector_size_kib_shift	= 2,
 	},
 	{
 		.id			= 0x4018,
 		.name			= "AT25Q128",
 		.nr_sectors_shift	= 12,
-		.sector_size_kib_shift	= 2,
 	},
 };
 
-static const struct spi_flash_ops spi_flash_ops = {
-	.read = spi_flash_cmd_read,
-	.write = spi_flash_cmd_write_page_program,
-	.erase = spi_flash_cmd_erase,
-	.status = spi_flash_cmd_status,
+const struct spi_flash_vendor_info spi_flash_atmel_vi = {
+	.id = VENDOR_ID_ATMEL,
+	.page_size_shift = 8,
+	.sector_size_kib_shift = 2,
+	.match_id_mask = 0xffff,
+	.ids = flash_table,
+	.nr_part_ids = ARRAY_SIZE(flash_table),
+	.desc = &spi_flash_pp_0x20_sector_desc,
 };
-
-int spi_flash_probe_atmel(const struct spi_slave *spi, u8 *idcode,
-			  struct spi_flash *flash)
-{
-	const struct spi_flash_part_id *params;
-	unsigned int i;
-
-	for (i = 0; i < ARRAY_SIZE(flash_table); i++) {
-		params = &flash_table[i];
-		if (params->id == ((idcode[1] << 8) | idcode[2]))
-			break;
-	}
-
-	if (i == ARRAY_SIZE(flash_table)) {
-		printk(BIOS_WARNING, "SF: Unsupported Atmel ID %02x%02x\n",
-				idcode[1], idcode[2]);
-		return -1;
-	}
-
-	memcpy(&flash->spi, spi, sizeof(*spi));
-	flash->name = params->name;
-
-	/* Assuming power-of-two page size initially. */
-	flash->page_size = 256;
-	flash->sector_size = (1U << params->sector_size_kib_shift) * KiB;
-	flash->size = flash->sector_size * (1U << params->nr_sectors_shift);
-	flash->erase_cmd = CMD_AT25_SE;
-	flash->status_cmd = CMD_AT25_RDSR;
-	flash->pp_cmd = CMD_AT25_PP;
-	flash->wren_cmd = CMD_AT25_WREN;
-
-	flash->ops = &spi_flash_ops;
-
-	return 0;
-}