spi_flash: gigadevice: Adopt Winbond chip info structure

This patch changes the Gigadevice SPI flash driver to adopt the same
structure packing improvements for the hardcoded parameters of
individual chips that was implemented for Winbond last year. This cuts
the size of the hardcoded info nearly in half and should save us a few
hundred bytes in every stage.

Change-Id: I9910dcb9b649f51b317f3f8fcba49e5e893f67d2
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33285
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 95 insertions, 94 deletions

diff --git a/src/drivers/spi/gigadevice.c b/src/drivers/spi/gigadevice.c
index 83216c06d1..714ed894f7 100644
--- a/src/drivers/spi/gigadevice.c
+++ b/src/drivers/spi/gigadevice.c
@@ -41,118 +41,117 @@
 
 struct gigadevice_spi_flash_params {
 	uint16_t	id;
-	/* Log2 of page size in power-of-two mode */
-	uint8_t		l2_page_size;
-	uint16_t	pages_per_sector;
-	uint16_t	sectors_per_block;
-	uint16_t	nr_blocks;
-	const char	*name;
+	uint8_t		l2_page_size_shift;
+	uint8_t		pages_per_sector_shift : 4;
+	uint8_t		sectors_per_block_shift : 4;
+	uint8_t		nr_blocks_shift;
+	const char	name[10];
 };
 
 static const struct gigadevice_spi_flash_params gigadevice_spi_flash_table[] = {
 	{
-		.id			= 0x3114,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 16,
-		.name			= "GD25T80",
+		.id				= 0x3114,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 4,
+		.name				= "GD25T80",
 	},
 	{
-		.id			= 0x4014,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 16,
-		.name			= "GD25Q80(B)",
-	},
+		.id				= 0x4014,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 4,
+		.name				= "GD25Q80",
+	},					/* also GD25Q80B */
 	{
-		.id			= 0x4015,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 32,
-		.name			= "GD25Q16(B)",
-	},
+		.id				= 0x4015,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 5,
+		.name				= "GD25Q16",
+	},					/* also GD25Q16B */
 	{
-		.id			= 0x4016,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 64,
-		.name			= "GD25Q32(B)",
-	},
+		.id				= 0x4016,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 6,
+		.name				= "GD25Q32B",
+	},					/* also GD25Q32B */
 	{
-		.id			= 0x4017,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 128,
-		.name			= "GD25Q64(B)/GD25B64C",
-	},
+		.id				= 0x4017,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 7,
+		.name				= "GD25Q64",
+	},					/* also GD25Q64B, GD25B64C */
 	{
-		.id			= 0x4018,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 256,
-		.name			= "GD25Q128(B)",
-	},
+		.id				= 0x4018,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 8,
+		.name				= "GD25Q128",
+	},					/* also GD25Q128B */
 	{
-		.id			= 0x4214,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 16,
-		.name			= "GD25VQ80C",
+		.id				= 0x4214,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 4,
+		.name				= "GD25VQ80C",
 	},
 	{
-		.id			= 0x4215,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 32,
-		.name			= "GD25VQ16C",
+		.id				= 0x4215,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 5,
+		.name				= "GD25VQ16C",
 	},
 	{
-		.id			= 0x6014,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 16,
-		.name			= "GD25LQ80",
+		.id				= 0x6014,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 4,
+		.name				= "GD25LQ80",
 	},
 	{
-		.id			= 0x6015,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 32,
-		.name			= "GD25LQ16",
+		.id				= 0x6015,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 5,
+		.name				= "GD25LQ16",
 	},
 	{
-		.id			= 0x6016,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 64,
-		.name			= "GD25LQ32",
+		.id				= 0x6016,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 6,
+		.name				= "GD25LQ32",
 	},
 	{
-		.id			= 0x6017,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 128,
-		.name			= "GD25LQ64C/GD25LB64C",
-	},
+		.id				= 0x6017,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 7,
+		.name				= "GD25LQ64C",
+	},					/* also GD25LB64C */
 	{
-		.id			= 0x6018,
-		.l2_page_size		= 8,
-		.pages_per_sector	= 16,
-		.sectors_per_block	= 16,
-		.nr_blocks		= 256,
-		.name			= "GD25LQ128",
+		.id				= 0x6018,
+		.l2_page_size_shift		= 8,
+		.pages_per_sector_shift		= 4,
+		.sectors_per_block_shift	= 4,
+		.nr_blocks_shift		= 8,
+		.name				= "GD25LQ128",
 	},
 };
 
@@ -252,10 +251,12 @@ int spi_flash_probe_gigadevice(const struct spi_slave *spi, u8 *idcode,
 	flash->name = params->name;
 
 	/* Assuming power-of-two page size initially. */
-	flash->page_size = 1 << params->l2_page_size;
-	flash->sector_size = flash->page_size * params->pages_per_sector;
-	flash->size = flash->sector_size * params->sectors_per_block *
-			params->nr_blocks;
+	flash->page_size = 1 << params->l2_page_size_shift;
+	flash->sector_size = flash->page_size *
+			     (1 << params->pages_per_sector_shift);
+	flash->size = flash->sector_size *
+		      (1 << params->sectors_per_block_shift) *
+		      (1 << params->nr_blocks_shift);
 	flash->erase_cmd = CMD_GD25_SE;
 	flash->status_cmd = CMD_GD25_RDSR;