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realtek_mst_i2c_spi.c: Consolidate shifts to the one fn

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To avoid further incorrect mappings ensure all the shifting
happens within realtek_mst_i2c_spi_map_page() itself.

BUG=none
BRANCH=none
TEST=builds

Change-Id: I96c595b1abae044347fb0c2c91b891a60dd3675e
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Suggested-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/48975
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Edward O'Callaghan 2020-12-29 19:00:24 +11:00 committed by Edward O'Callaghan
parent c9b31f5738
commit e3afd77087
1 changed files with 8 additions and 9 deletions
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17
realtek_mst_i2c_spi.c
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@ -289,9 +289,14 @@ static int realtek_mst_i2c_spi_send_command(const struct flashctx *flash,
return ret;
}
static int realtek_mst_i2c_spi_map_page(int fd, uint8_t block_idx, uint8_t page_idx, uint8_t byte_idx)
static int realtek_mst_i2c_spi_map_page(int fd, uint32_t addr)
{
int ret = 0;
uint8_t block_idx = (addr >> 16) & 0xff;
uint8_t page_idx = (addr >> 8) & 0xff;
uint8_t byte_idx = addr & 0xff;
ret |= realtek_mst_i2c_spi_write_register(fd, MAP_PAGE_BYTE2, block_idx);
ret |= realtek_mst_i2c_spi_write_register(fd, MAP_PAGE_BYTE1, page_idx);
ret |= realtek_mst_i2c_spi_write_register(fd, MAP_PAGE_BYTE0, byte_idx);
@ -330,10 +335,7 @@ static int realtek_mst_i2c_spi_read(struct flashctx *flash, uint8_t *buf,
start--;
ret |= realtek_mst_i2c_spi_write_register(fd, 0x60, 0x46); // **
ret |= realtek_mst_i2c_spi_write_register(fd, 0x61, OPCODE_READ);
uint8_t block_idx = (start >> 16) & 0xff;
uint8_t page_idx = (start >> 8) & 0xff;
uint8_t byte_idx = start & 0xff;
ret |= realtek_mst_i2c_spi_map_page(fd, block_idx, page_idx, byte_idx);
ret |= realtek_mst_i2c_spi_map_page(fd, start);
ret |= realtek_mst_i2c_spi_write_register(fd, 0x6a, 0x03);
ret |= realtek_mst_i2c_spi_write_register(fd, 0x60, 0x47); // **
if (ret)
@ -384,10 +386,7 @@ static int realtek_mst_i2c_spi_write_256(struct flashctx *flash, const uint8_t *
uint16_t page_len = min(len - i, PAGE_SIZE);
if (len - i < PAGE_SIZE)
ret |= realtek_mst_i2c_spi_write_register(fd, 0x71, page_len-1);
uint8_t block_idx = ((start + i) >> 16) & 0xff;
uint8_t page_idx = ((start + i) >> 8) & 0xff;
uint8_t byte_idx = (start + i) & 0xff;
ret |= realtek_mst_i2c_spi_map_page(fd, block_idx, page_idx, byte_idx);
ret |= realtek_mst_i2c_spi_map_page(fd, start + i);
if (ret)
break;