mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-26 17:01:14 +00:00
56 lines
1.5 KiB
Diff
56 lines
1.5 KiB
Diff
|
From 0add8e5c60961d2b99174610df8d3d9d6d192b74 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
|
||
|
|
Date: Wed, 7 Nov 2012 14:16:11 +0100
|
||
|
|
Subject: sf: spansion: add support for 4-byte address mode
|
||
|
|
|
||
|
|
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
|
||
|
|
|
||
|
|
--- a/drivers/mtd/spi/spansion.c
|
||
|
|
+++ b/drivers/mtd/spi/spansion.c
|
||
|
|
@@ -31,6 +31,10 @@
|
||
|
|
|
||
|
|
#include "spi_flash_internal.h"
|
||
|
|
|
||
|
|
+#define S25FLXX_BRRD 0x16 /* Read Bank Register */
|
||
|
|
+#define S25FLXX_BRWR 0x17 /* Write Bank Register */
|
||
|
|
+#define S25FLXX_BAR_EXTADD (1 << 7) /* Extended address enable */
|
||
|
|
+
|
||
|
|
struct spansion_spi_flash_params {
|
||
|
|
u16 idcode1;
|
||
|
|
u16 idcode2;
|
||
|
|
@@ -112,6 +116,23 @@ static const struct spansion_spi_flash_p
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
+static __maybe_unused int spansion_set_4byte_mode(struct spi_flash *flash)
|
||
|
|
+{
|
||
|
|
+ struct spi_slave *spi = flash->spi;
|
||
|
|
+ u8 bar, cmd;
|
||
|
|
+ int err;
|
||
|
|
+
|
||
|
|
+ cmd = S25FLXX_BRRD;
|
||
|
|
+ err = spi_flash_cmd(spi, cmd, &bar, 1);
|
||
|
|
+ if (err)
|
||
|
|
+ return err;
|
||
|
|
+
|
||
|
|
+ bar |= S25FLXX_BAR_EXTADD;
|
||
|
|
+ cmd = S25FLXX_BRWR;
|
||
|
|
+
|
||
|
|
+ return spi_flash_cmd_write(spi, &cmd, 1, &bar, 1);
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
int spi_flash_probe_spansion(struct spi_flash *flash, u8 *idcode)
|
||
|
|
{
|
||
|
|
const struct spansion_spi_flash_params *params;
|
||
|
|
@@ -144,5 +165,10 @@ int spi_flash_probe_spansion(struct spi_
|
||
|
|
flash->sector_size = 256 * params->pages_per_sector;
|
||
|
|
flash->size = flash->sector_size * params->nr_sectors;
|
||
|
|
|
||
|
|
+#ifdef CONFIG_SPI_FLASH_4BYTE_MODE
|
||
|
|
+ if (flash->size > (1 << 24))
|
||
|
|
+ flash->set_4byte_mode = spansion_set_4byte_mode;
|
||
|
|
+#endif
|
||
|
|
+
|
||
|
|
return 1;
|
||
|
|
}
|