* Atmel SPI DataFlash support
*
* Copyright (C) 2008 Atmel Corporation
+ * Licensed under the GPL-2 or later.
*/
-#define DEBUG
+
#include <common.h>
#include <malloc.h>
#include <spi_flash.h>
const char *name;
};
+/* spi_flash needs to be first so upper layers can free() it */
struct atmel_spi_flash {
- const struct atmel_spi_flash_params *params;
struct spi_flash flash;
+ const struct atmel_spi_flash_params *params;
};
static inline struct atmel_spi_flash *
}
static const struct atmel_spi_flash_params atmel_spi_flash_table[] = {
+ {
+ .idcode1 = 0x22,
+ .l2_page_size = 8,
+ .pages_per_block = 8,
+ .blocks_per_sector = 16,
+ .nr_sectors = 4,
+ .name = "AT45DB011D",
+ },
+ {
+ .idcode1 = 0x23,
+ .l2_page_size = 8,
+ .pages_per_block = 8,
+ .blocks_per_sector = 16,
+ .nr_sectors = 8,
+ .name = "AT45DB021D",
+ },
+ {
+ .idcode1 = 0x24,
+ .l2_page_size = 8,
+ .pages_per_block = 8,
+ .blocks_per_sector = 32,
+ .nr_sectors = 8,
+ .name = "AT45DB041D",
+ },
+ {
+ .idcode1 = 0x25,
+ .l2_page_size = 8,
+ .pages_per_block = 8,
+ .blocks_per_sector = 32,
+ .nr_sectors = 16,
+ .name = "AT45DB081D",
+ },
+ {
+ .idcode1 = 0x26,
+ .l2_page_size = 9,
+ .pages_per_block = 8,
+ .blocks_per_sector = 32,
+ .nr_sectors = 16,
+ .name = "AT45DB161D",
+ },
+ {
+ .idcode1 = 0x27,
+ .l2_page_size = 9,
+ .pages_per_block = 8,
+ .blocks_per_sector = 64,
+ .nr_sectors = 64,
+ .name = "AT45DB321D",
+ },
{
.idcode1 = 0x28,
.l2_page_size = 10,
return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
}
+/*
+ * TODO: the two write funcs (_p2/_at45) should get unified ...
+ */
+static int dataflash_write_p2(struct spi_flash *flash,
+ u32 offset, size_t len, const void *buf)
+{
+ struct atmel_spi_flash *asf = to_atmel_spi_flash(flash);
+ unsigned long page_size;
+ u32 addr = offset;
+ size_t chunk_len;
+ size_t actual;
+ int ret;
+ u8 cmd[4];
+
+ /*
+ * TODO: This function currently uses only page buffer #1. We can
+ * speed this up by using both buffers and loading one buffer while
+ * the other is being programmed into main memory.
+ */
+
+ page_size = (1 << asf->params->l2_page_size);
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: Unable to claim SPI bus\n");
+ return ret;
+ }
+
+ for (actual = 0; actual < len; actual += chunk_len) {
+ chunk_len = min(len - actual, page_size - (addr % page_size));
+
+ /* Use the same address bits for both commands */
+ cmd[0] = CMD_AT45_LOAD_BUF1;
+ cmd[1] = addr >> 16;
+ cmd[2] = addr >> 8;
+ cmd[3] = addr;
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, 4,
+ buf + actual, chunk_len);
+ if (ret < 0) {
+ debug("SF: Loading AT45 buffer failed\n");
+ goto out;
+ }
+
+ cmd[0] = CMD_AT45_PROG_BUF1;
+ ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
+ if (ret < 0) {
+ debug("SF: AT45 page programming failed\n");
+ goto out;
+ }
+
+ ret = at45_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+ if (ret < 0) {
+ debug("SF: AT45 page programming timed out\n");
+ goto out;
+ }
+
+ addr += chunk_len;
+ }
+
+ debug("SF: AT45: Successfully programmed %zu bytes @ 0x%x\n",
+ len, offset);
+ ret = 0;
+
+out:
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
static int dataflash_write_at45(struct spi_flash *flash,
u32 offset, size_t len, const void *buf)
{
int ret;
u8 cmd[4];
+ /*
+ * TODO: This function currently uses only page buffer #1. We can
+ * speed this up by using both buffers and loading one buffer while
+ * the other is being programmed into main memory.
+ */
+
page_shift = asf->params->l2_page_size;
page_size = (1 << page_shift) + (1 << (page_shift - 5));
page_shift++;
return ret;
}
+/*
+ * TODO: the two erase funcs (_p2/_at45) should get unified ...
+ */
+int dataflash_erase_p2(struct spi_flash *flash, u32 offset, size_t len)
+{
+ struct atmel_spi_flash *asf = to_atmel_spi_flash(flash);
+ unsigned long page_size;
+
+ size_t actual;
+ int ret;
+ u8 cmd[4];
+
+ /*
+ * TODO: This function currently uses page erase only. We can
+ * probably speed things up by using block and/or sector erase
+ * when possible.
+ */
+
+ page_size = (1 << asf->params->l2_page_size);
+
+ if (offset % page_size || len % page_size) {
+ debug("SF: Erase offset/length not multiple of page size\n");
+ return -1;
+ }
+
+ cmd[0] = CMD_AT45_ERASE_PAGE;
+ cmd[3] = 0x00;
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: Unable to claim SPI bus\n");
+ return ret;
+ }
+
+ for (actual = 0; actual < len; actual += page_size) {
+ cmd[1] = offset >> 16;
+ cmd[2] = offset >> 8;
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
+ if (ret < 0) {
+ debug("SF: AT45 page erase failed\n");
+ goto out;
+ }
+
+ ret = at45_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
+ if (ret < 0) {
+ debug("SF: AT45 page erase timed out\n");
+ goto out;
+ }
+
+ offset += page_size;
+ }
+
+ debug("SF: AT45: Successfully erased %zu bytes @ 0x%x\n",
+ len, offset);
+ ret = 0;
+
+out:
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
int dataflash_erase_at45(struct spi_flash *flash, u32 offset, size_t len)
{
struct atmel_spi_flash *asf = to_atmel_spi_flash(flash);
page_size += 1 << (params->l2_page_size - 5);
} else {
asf->flash.read = dataflash_read_fast_p2;
+ asf->flash.write = dataflash_write_p2;
+ asf->flash.erase = dataflash_erase_p2;
}
break;
projects / karo-tx-uboot.git / blobdiff