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