sf: Read flash bank addr register at probe time

[u-boot] / drivers / mtd / spi / spi_flash.c

diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 17f3d3cb147c1e1734a38a3fc26f95c0acc83c12..64b57ecc7103f4ce07d056bceb6e4e198a1d2c6a 100644 (file)
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <fdtdec.h>
 #include <malloc.h>
 #include <spi.h>
 #include <spi_flash.h>
@@ -15,6 +16,8 @@
 
 #include "spi_flash_internal.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
 static void spi_flash_addr(u32 addr, u8 *cmd)
 {
        /* cmd[0] is actual command */
@@ -87,6 +90,9 @@ int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
        for (actual = 0; actual < len; actual += chunk_len) {
                chunk_len = min(len - actual, page_size - byte_addr);
 
+               if (flash->spi->max_write_size)
+                       chunk_len = min(chunk_len, flash->spi->max_write_size);
+
                cmd[1] = page_addr >> 8;
                cmd[2] = page_addr;
                cmd[3] = byte_addr;
@@ -111,13 +117,13 @@ int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
                if (ret)
                        break;
 
-               page_addr++;
-               byte_addr = 0;
+               byte_addr += chunk_len;
+               if (byte_addr == page_size) {
+                       page_addr++;
+                       byte_addr = 0;
+               }
        }
 
-       debug("SF: program %s %zu bytes @ %#x\n",
-             ret ? "failure" : "success", len, offset);
-
        spi_release_bus(flash->spi);
        return ret;
 }
@@ -140,6 +146,12 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
 {
        u8 cmd[5];
 
+       /* Handle memory-mapped SPI */
+       if (flash->memory_map) {
+               memcpy(data, flash->memory_map + offset, len);
+               return 0;
+       }
+
        cmd[0] = CMD_READ_ARRAY_FAST;
        spi_flash_addr(offset, cmd);
        cmd[4] = 0x00;
@@ -192,7 +204,7 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
 
 int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
-       u32 start, end, erase_size;
+       u32 end, erase_size;
        int ret;
        u8 cmd[4];
 
@@ -212,8 +224,7 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
                cmd[0] = CMD_ERASE_4K;
        else
                cmd[0] = CMD_ERASE_64K;
-       start = offset;
-       end = start + len;
+       end = offset + len;
 
        while (offset < end) {
                spi_flash_addr(offset, cmd);
@@ -235,8 +246,6 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
                        goto out;
        }
 
-       debug("SF: Successfully erased %zu bytes @ %#x\n", len, start);
-
  out:
        spi_release_bus(flash->spi);
        return ret;
@@ -269,6 +278,103 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
        return 0;
 }
 
+int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel)
+{
+       u8 cmd;
+       int ret;
+
+       if (flash->bank_curr == bank_sel) {
+               debug("SF: not require to enable bank%d\n", bank_sel);
+               return 0;
+       }
+
+       cmd = flash->bank_write_cmd;
+       ret = spi_flash_cmd_write_enable(flash);
+       if (ret < 0) {
+               debug("SF: enabling write failed\n");
+               return ret;
+       }
+
+       ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &bank_sel, 1);
+       if (ret) {
+               debug("SF: fail to write bank addr register\n");
+               return ret;
+       }
+       flash->bank_curr = bank_sel;
+
+       ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+       if (ret < 0) {
+               debug("SF: write bank addr register timed out\n");
+               return ret;
+       }
+
+       return 0;
+}
+
+int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
+{
+       u8 cmd;
+       u8 curr_bank = 0;
+
+       /* discover bank cmds */
+       switch (idcode0) {
+       case SPI_FLASH_SPANSION_IDCODE0:
+               flash->bank_read_cmd = CMD_BANKADDR_BRRD;
+               flash->bank_write_cmd = CMD_BANKADDR_BRWR;
+               break;
+       case SPI_FLASH_STMICRO_IDCODE0:
+       case SPI_FLASH_WINBOND_IDCODE0:
+               flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
+               flash->bank_write_cmd = CMD_EXTNADDR_WREAR;
+               break;
+       default:
+               printf("SF: Unsupported bank commands %02x\n", idcode0);
+               return -1;
+       }
+
+       /* read the bank reg - on which bank the flash is in currently */
+       cmd = flash->bank_read_cmd;
+       if (flash->size > SPI_FLASH_16MB_BOUN) {
+               if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) {
+                       debug("SF: fail to read bank addr register\n");
+                       return -1;
+               }
+               flash->bank_curr = curr_bank;
+       } else {
+               flash->bank_curr = curr_bank;
+       }
+
+       return 0;
+}
+
+#ifdef CONFIG_OF_CONTROL
+int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
+{
+       fdt_addr_t addr;
+       fdt_size_t size;
+       int node;
+
+       /* If there is no node, do nothing */
+       node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
+       if (node < 0)
+               return 0;
+
+       addr = fdtdec_get_addr_size(blob, node, "memory-map", &size);
+       if (addr == FDT_ADDR_T_NONE) {
+               debug("%s: Cannot decode address\n", __func__);
+               return 0;
+       }
+
+       if (flash->size != size) {
+               debug("%s: Memory map must cover entire device\n", __func__);
+               return -1;
+       }
+       flash->memory_map = (void *)addr;
+
+       return 0;
+}
+#endif /* CONFIG_OF_CONTROL */
+
 /*
  * The following table holds all device probe functions
  *
@@ -385,9 +491,23 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
                goto err_manufacturer_probe;
        }
 
+       /* Configure the BAR - disover bank cmds and read current bank  */
+       ret = spi_flash_bank_config(flash, *idp);
+       if (ret < 0)
+               goto err_manufacturer_probe;
+
+#ifdef CONFIG_OF_CONTROL
+       if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
+               debug("SF: FDT decode error\n");
+               goto err_manufacturer_probe;
+       }
+#endif
        printf("SF: Detected %s with page size ", flash->name);
        print_size(flash->sector_size, ", total ");
-       print_size(flash->size, "\n");
+       print_size(flash->size, "");
+       if (flash->memory_map)
+               printf(", mapped at %p", flash->memory_map);
+       puts("\n");
 
        spi_release_bus(spi);