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Add missing dummy reads

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This commit is contained in:
Alex Forencich 2022-03-03 22:44:32 -08:00
parent d5f1da7f08
commit e3799aa1bf
1 changed files with 3 additions and 0 deletions
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3
utils/flash_spi.c
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@ -147,6 +147,7 @@ uint8_t spi_flash_read_byte(struct flash_device *fdev, int protocol)
for (int i = 7; i >= 0; i--)
{
reg_write32(fdev->ctrl_reg, 0);
reg_read32(fdev->ctrl_reg); // dummy read
val |= ((reg_read32(fdev->ctrl_reg) & FLASH_D_1) != 0) << i;
reg_write32(fdev->ctrl_reg, FLASH_CLK);
reg_read32(fdev->ctrl_reg); // dummy read
@ -158,6 +159,7 @@ uint8_t spi_flash_read_byte(struct flash_device *fdev, int protocol)
for (int i = 6; i >= 0; i -= 2)
{
reg_write32(fdev->ctrl_reg, 0);
reg_read32(fdev->ctrl_reg); // dummy read
val |= (reg_read32(fdev->ctrl_reg) & FLASH_D_01) << i;
reg_write32(fdev->ctrl_reg, FLASH_CLK);
reg_read32(fdev->ctrl_reg); // dummy read
@ -169,6 +171,7 @@ uint8_t spi_flash_read_byte(struct flash_device *fdev, int protocol)
for (int i = 4; i >= 0; i -= 4)
{
reg_write32(fdev->ctrl_reg, 0);
reg_read32(fdev->ctrl_reg); // dummy read
val |= (reg_read32(fdev->ctrl_reg) & FLASH_D_0123) << i;
reg_write32(fdev->ctrl_reg, FLASH_CLK);
reg_read32(fdev->ctrl_reg); // dummy read