133 lines
3.4 KiB
Diff
133 lines
3.4 KiB
Diff
From 7f6ded11965b09daf6da44d4fa98da17b9fba36c Mon Sep 17 00:00:00 2001
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From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
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Date: Tue, 6 Nov 2012 19:41:26 +0100
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Subject: sf: add MTD layer driver for SPI flash devices
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Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
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--- a/drivers/mtd/spi/Makefile
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+++ b/drivers/mtd/spi/Makefile
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@@ -30,6 +30,7 @@ COBJS-$(CONFIG_SPL_SPI_LOAD) += spi_spl_
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endif
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COBJS-$(CONFIG_SPI_FLASH) += spi_flash.o
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+COBJS-$(CONFIG_SPI_FLASH_MTD) += spi_flash_mtd.o
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COBJS-$(CONFIG_SPI_FLASH_ATMEL) += atmel.o
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COBJS-$(CONFIG_SPI_FLASH_EON) += eon.o
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COBJS-$(CONFIG_SPI_FLASH_MACRONIX) += macronix.o
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--- a/drivers/mtd/spi/spi_flash_internal.h
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+++ b/drivers/mtd/spi/spi_flash_internal.h
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@@ -122,6 +122,9 @@ static inline int spi_flash_set_4byte_mo
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}
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#endif
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+/* SPI flash MTD adapter init */
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+int spi_flash_mtd_init(struct spi_flash *flash);
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+
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/* Manufacturer-specific probe functions */
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int spi_flash_probe_spansion(struct spi_flash *flash, u8 *idcode);
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int spi_flash_probe_atmel(struct spi_flash *flash, u8 *idcode);
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--- /dev/null
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+++ b/drivers/mtd/spi/spi_flash_mtd.c
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@@ -0,0 +1,101 @@
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+/*
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+ * (C) Copyright 2012 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
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+ *
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+ * MTD layer driver for SPI flash devices
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+ *
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+ * This file is released under the terms of GPL v2 and any later version.
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+ * See the file COPYING in the root directory of the source tree for details.
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+ */
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+
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+#include <common.h>
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+#include <malloc.h>
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+#include <asm/errno.h>
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+#include <linux/mtd/mtd.h>
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+#include <spi_flash.h>
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+
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+static struct mtd_info sf_mtd_info;
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+static char sf_mtd_name[8];
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+
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+static int spi_flash_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
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+{
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+ struct spi_flash *flash = mtd->priv;
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+ int err;
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+
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+ instr->state = MTD_ERASING;
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+
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+ err = spi_flash_erase(flash, instr->addr, instr->len);
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+ if (err) {
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+ instr->state = MTD_ERASE_FAILED;
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+ instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
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+ return -EIO;
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+ }
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+
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+ instr->state = MTD_ERASE_DONE;
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+ mtd_erase_callback(instr);
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+
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+ return 0;
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+}
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+
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+static int spi_flash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
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+ size_t *retlen, u_char *buf)
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+{
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+ struct spi_flash *flash = mtd->priv;
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+ int err;
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+
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+ err = spi_flash_read(flash, from, len, buf);
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+ if (!err)
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+ *retlen = len;
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+
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+ return err;
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+}
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+
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+static int spi_flash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
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+ size_t *retlen, const u_char *buf)
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+{
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+ struct spi_flash *flash = mtd->priv;
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+ int err;
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+
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+ err = spi_flash_write(flash, to, len, buf);
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+ if (!err)
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+ *retlen = len;
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+
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+ return err;
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+}
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+
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+static void spi_flash_mtd_sync(struct mtd_info *mtd)
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+{
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+}
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+
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+static int spi_flash_mtd_number(void)
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+{
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+#ifdef CONFIG_SYS_MAX_FLASH_BANKS
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+ return CONFIG_SYS_MAX_FLASH_BANKS;
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+#else
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+ return 0;
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+#endif
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+}
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+
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+int spi_flash_mtd_init(struct spi_flash *flash)
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+{
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+ memset(&sf_mtd_info, 0, sizeof(sf_mtd_info));
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+ sprintf(sf_mtd_name, "nor%d", spi_flash_mtd_number());
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+
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+ sf_mtd_info.name = sf_mtd_name;
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+ sf_mtd_info.type = MTD_NORFLASH;
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+ sf_mtd_info.flags = MTD_CAP_NORFLASH;
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+ sf_mtd_info.writesize = 1;
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+
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+ sf_mtd_info.erase = spi_flash_mtd_erase;
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+ sf_mtd_info.read = spi_flash_mtd_read;
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+ sf_mtd_info.write = spi_flash_mtd_write;
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+ sf_mtd_info.sync = spi_flash_mtd_sync;
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+
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+ sf_mtd_info.size = flash->size;
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+ sf_mtd_info.priv = flash;
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+
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+ /* Only uniform flash devices for now */
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+ sf_mtd_info.numeraseregions = 0;
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+ sf_mtd_info.erasesize = flash->sector_size;
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+
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+ return add_mtd_device(&sf_mtd_info);
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+}
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