mirror of https://github.com/hak5/openwrt-owl.git
108 lines
3.2 KiB
Diff
108 lines
3.2 KiB
Diff
|
From acb2721e1cd2e7488a7b08a4ed590177369a1689 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
|
||
|
|
Date: Tue, 6 Nov 2012 19:10:40 +0100
|
||
|
|
Subject: sf: factor out the flash address calculation
|
||
|
|
|
||
|
|
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
|
||
|
|
|
||
|
|
--- a/drivers/mtd/spi/spi_flash.c
|
||
|
|
+++ b/drivers/mtd/spi/spi_flash.c
|
||
|
|
@@ -15,12 +15,22 @@
|
||
|
|
|
||
|
|
#include "spi_flash_internal.h"
|
||
|
|
|
||
|
|
-static void spi_flash_addr(u32 addr, u8 *cmd)
|
||
|
|
+static void spi_flash_addr(struct spi_flash *flash, u32 addr, u8 *cmd, u8 *cmd_len)
|
||
|
|
{
|
||
|
|
/* cmd[0] is actual command */
|
||
|
|
cmd[1] = addr >> 16;
|
||
|
|
cmd[2] = addr >> 8;
|
||
|
|
cmd[3] = addr >> 0;
|
||
|
|
+ *cmd_len = 4;
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+static void spi_flash_page_addr(struct spi_flash *flash, u32 page_addr, u32 byte_addr, u8 *cmd, u8 *cmd_len)
|
||
|
|
+{
|
||
|
|
+ /* cmd[0] is actual command */
|
||
|
|
+ cmd[1] = page_addr >> 8;
|
||
|
|
+ cmd[2] = page_addr >> 0;
|
||
|
|
+ cmd[3] = byte_addr;
|
||
|
|
+ *cmd_len = 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int spi_flash_read_write(struct spi_slave *spi,
|
||
|
|
@@ -71,7 +81,7 @@ int spi_flash_cmd_write_multi(struct spi
|
||
|
|
unsigned long page_addr, byte_addr, page_size;
|
||
|
|
size_t chunk_len, actual;
|
||
|
|
int ret;
|
||
|
|
- u8 cmd[4];
|
||
|
|
+ u8 cmd[4], cmd_len;
|
||
|
|
|
||
|
|
page_size = flash->page_size;
|
||
|
|
page_addr = offset / page_size;
|
||
|
|
@@ -87,9 +97,7 @@ int spi_flash_cmd_write_multi(struct spi
|
||
|
|
for (actual = 0; actual < len; actual += chunk_len) {
|
||
|
|
chunk_len = min(len - actual, page_size - byte_addr);
|
||
|
|
|
||
|
|
- cmd[1] = page_addr >> 8;
|
||
|
|
- cmd[2] = page_addr;
|
||
|
|
- cmd[3] = byte_addr;
|
||
|
|
+ spi_flash_page_addr(flash, page_addr, byte_addr, cmd, &cmd_len);
|
||
|
|
|
||
|
|
debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
|
||
|
|
buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
|
||
|
|
@@ -100,7 +108,7 @@ int spi_flash_cmd_write_multi(struct spi
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
- ret = spi_flash_cmd_write(flash->spi, cmd, 4,
|
||
|
|
+ ret = spi_flash_cmd_write(flash->spi, cmd, cmd_len,
|
||
|
|
buf + actual, chunk_len);
|
||
|
|
if (ret < 0) {
|
||
|
|
debug("SF: write failed\n");
|
||
|
|
@@ -138,13 +146,13 @@ int spi_flash_read_common(struct spi_fla
|
||
|
|
int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
|
||
|
|
size_t len, void *data)
|
||
|
|
{
|
||
|
|
- u8 cmd[5];
|
||
|
|
+ u8 cmd[5], cmd_len;
|
||
|
|
|
||
|
|
cmd[0] = CMD_READ_ARRAY_FAST;
|
||
|
|
- spi_flash_addr(offset, cmd);
|
||
|
|
- cmd[4] = 0x00;
|
||
|
|
+ spi_flash_addr(flash, offset, cmd, &cmd_len);
|
||
|
|
+ cmd[cmd_len] = 0x00;
|
||
|
|
|
||
|
|
- return spi_flash_read_common(flash, cmd, sizeof(cmd), data, len);
|
||
|
|
+ return spi_flash_read_common(flash, cmd, cmd_len + 1, data, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
|
||
|
|
@@ -194,7 +202,7 @@ int spi_flash_cmd_erase(struct spi_flash
|
||
|
|
{
|
||
|
|
u32 start, end, erase_size;
|
||
|
|
int ret;
|
||
|
|
- u8 cmd[4];
|
||
|
|
+ u8 cmd[4], cmd_len;
|
||
|
|
|
||
|
|
erase_size = flash->sector_size;
|
||
|
|
if (offset % erase_size || len % erase_size) {
|
||
|
|
@@ -216,7 +224,7 @@ int spi_flash_cmd_erase(struct spi_flash
|
||
|
|
end = start + len;
|
||
|
|
|
||
|
|
while (offset < end) {
|
||
|
|
- spi_flash_addr(offset, cmd);
|
||
|
|
+ spi_flash_addr(flash, offset, cmd, &cmd_len);
|
||
|
|
offset += erase_size;
|
||
|
|
|
||
|
|
debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
|
||
|
|
@@ -226,7 +234,7 @@ int spi_flash_cmd_erase(struct spi_flash
|
||
|
|
if (ret)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
- ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
|
||
|
|
+ ret = spi_flash_cmd_write(flash->spi, cmd, cmd_len, NULL, 0);
|
||
|
|
if (ret)
|
||
|
|
goto out;
|
||
|
|
|