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pyrite: Support older micron flash chips

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2026-02-26 01:23:50 -08:00
parent ae3fa375f4
commit 442eb06868
1 changed files with 39 additions and 39 deletions
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56
src/pyrite/utils/flash_spi.c
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@@ -588,6 +588,21 @@ int spi_flash_write(struct flash_device *fdev, size_t addr, size_t len, const vo
}
while (len > 0) {
// check alignment
if ((addr & (SPI_PAGE_SIZE-1)) != 0) {
fprintf(stderr, "Invalid write request\n");
spi_flash_deselect(fdev);
return -1;
}
// set extended address
// note: some devices do not support 4B address program operations (e.g. N25Q256Ax1E)
// so we always use 3B operations
if (fdev->size > 0x1000000) {
spi_flash_write_ext_addr_reg(fdev, addr >> 24, SPI_PROTO_STR);
}
// enable writing
spi_flash_write_enable(fdev, SPI_PROTO_STR);
if (!(spi_flash_read_status_reg(fdev, SPI_PROTO_STR) & 0x02)) {
@@ -596,22 +611,13 @@ int spi_flash_write(struct flash_device *fdev, size_t addr, size_t len, const vo
return -1;
}
if (fdev->size > 0x1000000) {
// four byte address page program
// write page
if (protocol == SPI_PROTO_QUAD_STR) {
spi_flash_write_byte(fdev, SPI_CMD_4B_PAGE_PROGRAM_QUAD_IN_EXT, SPI_PROTO_STR);
} else {
spi_flash_write_byte(fdev, SPI_CMD_4B_PAGE_PROGRAM, SPI_PROTO_STR);
}
spi_flash_write_addr_4b(fdev, addr, protocol);
} else {
// normal page program
if (protocol == SPI_PROTO_QUAD_STR) {
spi_flash_write_byte(fdev, SPI_CMD_PAGE_PROGRAM_QUAD_IN_EXT, SPI_PROTO_STR);
spi_flash_write_byte(fdev, SPI_CMD_PAGE_PROGRAM_QUAD_IN, SPI_PROTO_STR);
spi_flash_write_addr(fdev, addr, SPI_PROTO_STR);
} else {
spi_flash_write_byte(fdev, SPI_CMD_PAGE_PROGRAM, SPI_PROTO_STR);
}
spi_flash_write_addr(fdev, addr, protocol);
spi_flash_write_addr(fdev, addr, SPI_PROTO_STR);
}
while (len > 0) {
@@ -620,7 +626,7 @@ int spi_flash_write(struct flash_device *fdev, size_t addr, size_t len, const vo
s++;
len--;
if ((addr & 0xff) == 0)
if ((addr & (SPI_PAGE_SIZE-1)) == 0)
break;
}
@@ -640,7 +646,7 @@ int spi_flash_erase(struct flash_device *fdev, size_t addr, size_t len)
size_t erase_block_size = fdev->erase_block_size;
while (len > 0) {
// determine sector size
// determine sector size and check alignment
erase_block_size = 0;
if ((addr & (SPI_SECTOR_SIZE-1)) == 0 && len >= SPI_SECTOR_SIZE) {
@@ -649,13 +655,19 @@ int spi_flash_erase(struct flash_device *fdev, size_t addr, size_t len)
erase_block_size = SPI_SUBSECTOR_SIZE;
}
// check size and alignment
if (!erase_block_size) {
fprintf(stderr, "Invalid erase request\n");
spi_flash_deselect(fdev);
return -1;
}
// set extended address
// note: some devices do not support 4B address program operations (e.g. N25Q256Ax1E)
// so we always use 3B operations
if (fdev->size > 0x1000000) {
spi_flash_write_ext_addr_reg(fdev, addr >> 24, SPI_PROTO_STR);
}
// enable writing
spi_flash_write_enable(fdev, SPI_PROTO_STR);
@@ -666,17 +678,6 @@ int spi_flash_erase(struct flash_device *fdev, size_t addr, size_t len)
}
// block erase
if (fdev->size > 0x1000000) {
if (erase_block_size == SPI_SECTOR_SIZE) {
// four byte address sector erase
spi_flash_write_byte(fdev, SPI_CMD_4B_SECTOR_ERASE, SPI_PROTO_STR);
spi_flash_write_addr_4b(fdev, addr, SPI_PROTO_STR);
} else if (erase_block_size == SPI_SUBSECTOR_SIZE) {
// normal 4KB subsector erase
spi_flash_write_byte(fdev, SPI_CMD_4B_4KB_SUBSECTOR_ERASE, SPI_PROTO_STR);
spi_flash_write_addr_4b(fdev, addr, SPI_PROTO_STR);
}
} else {
if (erase_block_size == SPI_SECTOR_SIZE) {
// normal sector erase
spi_flash_write_byte(fdev, SPI_CMD_SECTOR_ERASE, SPI_PROTO_STR);
@@ -686,7 +687,6 @@ int spi_flash_erase(struct flash_device *fdev, size_t addr, size_t len)
spi_flash_write_byte(fdev, SPI_CMD_4KB_SUBSECTOR_ERASE, SPI_PROTO_STR);
spi_flash_write_addr(fdev, addr, SPI_PROTO_STR);
}
}
spi_flash_deselect(fdev);