drivers/spi/spi_flash: Add page_size to struct spi_flash

Add a new member page_size to spi_flash structure so that the various
spi flash drivers can store this info in spi_flash along with the
other sizes (sector size and total size) during flash probe. This
removes the need to have {driver}_spi_flash structure in every spi
flash driver.

This is part of patch series to clean up the SPI flash and SPI driver
interface.

BUG=b:38330715

Change-Id: I0f83e52cb1041432b0b575a8ee3bd173cc038d1f
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/19704
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 18 insertions, 35 deletions

diff --git a/src/drivers/spi/atmel.c b/src/drivers/spi/atmel.c
index 4fe679d036..4f614ff283 100644
--- a/src/drivers/spi/atmel.c
+++ b/src/drivers/spi/atmel.c
@@ -38,18 +38,6 @@ struct atmel_spi_flash_params {
 	const char	*name;
 };
 
-/* spi_flash needs to be first so upper layers can free() it */
-struct atmel_spi_flash {
-	struct spi_flash flash;
-	const struct atmel_spi_flash_params *params;
-};
-
-static inline struct atmel_spi_flash *
-to_atmel_spi_flash(const struct spi_flash *flash)
-{
-	return container_of(flash, struct atmel_spi_flash, flash);
-}
-
 static const struct atmel_spi_flash_params atmel_spi_flash_table[] = {
 	{
 		.id			= 0x3015,
@@ -112,7 +100,6 @@ static const struct atmel_spi_flash_params atmel_spi_flash_table[] = {
 static int atmel_write(const struct spi_flash *flash, u32 offset, size_t len,
 		const void *buf)
 {
-	struct atmel_spi_flash *stm = to_atmel_spi_flash(flash);
 	unsigned long byte_addr;
 	unsigned long page_size;
 	size_t chunk_len;
@@ -120,7 +107,7 @@ static int atmel_write(const struct spi_flash *flash, u32 offset, size_t len,
 	int ret;
 	u8 cmd[4];
 
-	page_size = 1 << stm->params->l2_page_size;
+	page_size = flash->page_size;
 
 	for (actual = 0; actual < len; actual += chunk_len) {
 		byte_addr = offset % page_size;
@@ -170,9 +157,8 @@ out:
 struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode)
 {
 	const struct atmel_spi_flash_params *params;
-	unsigned page_size;
-	struct atmel_spi_flash *stm;
 	unsigned int i;
+	struct spi_flash *flash;
 
 	for (i = 0; i < ARRAY_SIZE(atmel_spi_flash_table); i++) {
 		params = &atmel_spi_flash_table[i];
@@ -186,32 +172,29 @@ struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode)
 		return NULL;
 	}
 
-	stm = malloc(sizeof(struct atmel_spi_flash));
-	if (!stm) {
+	flash = malloc(sizeof(*flash));
+	if (!flash) {
 		printk(BIOS_WARNING, "SF: Failed to allocate memory\n");
 		return NULL;
 	}
 
-	stm->params = params;
-	memcpy(&stm->flash.spi, spi, sizeof(*spi));
-	stm->flash.name = params->name;
+	memcpy(&flash->spi, spi, sizeof(*spi));
+	flash->name = params->name;
 
 	/* Assuming power-of-two page size initially. */
-	page_size = 1 << params->l2_page_size;
-
-	stm->flash.internal_write = atmel_write;
-	stm->flash.internal_erase = spi_flash_cmd_erase;
+	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->erase_cmd = CMD_AT25_SE;
+
+	flash->internal_write = atmel_write;
+	flash->internal_erase = spi_flash_cmd_erase;
 #if CONFIG_SPI_FLASH_NO_FAST_READ
-	stm->flash.internal_read = spi_flash_cmd_read_slow;
+	flash->internal_read = spi_flash_cmd_read_slow;
 #else
-	stm->flash.internal_read = spi_flash_cmd_read_fast;
+	flash->internal_read = spi_flash_cmd_read_fast;
 #endif
-	stm->flash.sector_size = (1 << stm->params->l2_page_size) *
-		stm->params->pages_per_sector;
-	stm->flash.size = page_size * params->pages_per_sector
-				* params->sectors_per_block
-				* params->nr_blocks;
-	stm->flash.erase_cmd = CMD_AT25_SE;
-
-	return &stm->flash;
+
+	return flash;
 }