mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
166 lines
4.5 KiB
Diff
166 lines
4.5 KiB
Diff
--- /dev/null
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+++ b/drivers/mtd/maps/gumstix-flash.c
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@@ -0,0 +1,136 @@
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+/*
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+ * Map driver for the Gumstix platform
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+ *
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+ * Author: Craig Hughes
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/map.h>
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+#include <linux/mtd/partitions.h>
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+#include <asm/io.h>
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+#include <asm/hardware.h>
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+#include <asm/arch/gumstix.h>
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+
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+
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+#define ROM_ADDR 0x00000000
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+#define FLASH_ADDR 0x00000000
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+
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+#define WINDOW_SIZE 64*1024*1024
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+
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+static struct map_info gumstix_flash_maps[1] = { {
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+ .name = "Gumstix Flash ROM",
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+ .size = WINDOW_SIZE,
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+ .phys = FLASH_ADDR,
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+ .bankwidth = 2,
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+} };
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+
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+static struct mtd_partition gumstix_flash_partitions[] = {
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+ {
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+ .name = "Bootloader",
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+ .size = 0x00040000,
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+ .offset = FLASH_ADDR
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+ },{
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+ .name = "RootFS",
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+ .size = MTDPART_SIZ_FULL,
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+ .offset = MTDPART_OFS_APPEND
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+ }
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+};
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+
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+static struct mtd_info *mymtds[1];
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+static struct mtd_partition *parsed_parts[1];
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+static int nr_parsed_parts[1];
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+
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+static const char *probes[] = { NULL };
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+
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+static int __init gumstix_flashmap_init(void)
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+{
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+ int ret = 0, i;
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+
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+ for (i = 0; i < 1; i++) {
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+ gumstix_flash_maps[i].virt = ioremap(gumstix_flash_maps[i].phys, WINDOW_SIZE);
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+ if (!gumstix_flash_maps[i].virt) {
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+ printk(KERN_WARNING "Failed to ioremap %s\n", gumstix_flash_maps[i].name);
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+ if (!ret)
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+ ret = -ENOMEM;
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+ continue;
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+ }
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+ simple_map_init(&gumstix_flash_maps[i]);
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+
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+ printk(KERN_NOTICE "Probing %s at physical address 0x%08lx (%d-bit bankwidth)\n",
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+ gumstix_flash_maps[i].name, gumstix_flash_maps[i].phys,
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+ gumstix_flash_maps[i].bankwidth * 8);
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+
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+ mymtds[i] = do_map_probe("cfi_probe", &gumstix_flash_maps[i]);
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+
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+ if (!mymtds[i]) {
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+ iounmap((void *)gumstix_flash_maps[i].virt);
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+ if (gumstix_flash_maps[i].cached)
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+ iounmap(gumstix_flash_maps[i].cached);
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+ if (!ret)
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+ ret = -EIO;
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+ continue;
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+ }
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+ mymtds[i]->owner = THIS_MODULE;
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+
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+ ret = parse_mtd_partitions(mymtds[i], probes,
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+ &parsed_parts[i], 0);
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+
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+ if (ret > 0)
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+ nr_parsed_parts[i] = ret;
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+ }
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+
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+ if (!mymtds[0])
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+ return ret;
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+
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+ for (i = 0; i < 1; i++) {
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+ if (!mymtds[i]) {
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+ printk(KERN_WARNING "%s is absent. Skipping\n", gumstix_flash_maps[i].name);
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+ } else if (nr_parsed_parts[i]) {
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+ add_mtd_partitions(mymtds[i], parsed_parts[i], nr_parsed_parts[i]);
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+ } else if (!i) {
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+ printk("Using static partitions on %s\n", gumstix_flash_maps[i].name);
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+ add_mtd_partitions(mymtds[i], gumstix_flash_partitions, ARRAY_SIZE(gumstix_flash_partitions));
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+ } else {
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+ printk("Registering %s as whole device\n", gumstix_flash_maps[i].name);
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+ add_mtd_device(mymtds[i]);
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+ }
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+ }
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+ return 0;
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+}
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+
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+static void __exit gumstix_flashmap_cleanup(void)
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+{
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+ int i;
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+ for (i = 0; i < 1; i++) {
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+ if (!mymtds[i])
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+ continue;
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+
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+ if (nr_parsed_parts[i] || !i)
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+ del_mtd_partitions(mymtds[i]);
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+ else
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+ del_mtd_device(mymtds[i]);
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+
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+ map_destroy(mymtds[i]);
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+ iounmap((void *)gumstix_flash_maps[i].virt);
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+ if (gumstix_flash_maps[i].cached)
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+ iounmap(gumstix_flash_maps[i].cached);
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+
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+ if (parsed_parts[i])
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+ kfree(parsed_parts[i]);
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+ }
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+}
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+
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+module_init(gumstix_flashmap_init);
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+module_exit(gumstix_flashmap_cleanup);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_AUTHOR("Gumstix, Inc. <gumstix-users@lists.sf.net>");
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+MODULE_DESCRIPTION("MTD map driver for the Gumstix Platform");
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--- a/drivers/mtd/maps/Kconfig
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+++ b/drivers/mtd/maps/Kconfig
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@@ -131,6 +131,13 @@ config MTD_SBC_GXX
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More info at
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<http://www.arcomcontrols.com/products/icp/pc104/processors/SBC_GX1.htm>.
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+config MTD_GUMSTIX
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+ tristate "CFI Flash device mapped on Gumstix"
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+ depends on ARCH_GUMSTIX && MTD_CFI_INTELEXT && MTD_PARTITIONS
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+ help
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+ This provides a driver for the on-board flash of the Gumstix
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+ single board computers.
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+
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config MTD_LUBBOCK
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tristate "CFI Flash device mapped on Intel Lubbock XScale eval board"
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depends on ARCH_LUBBOCK && MTD_CFI_INTELEXT && MTD_PARTITIONS
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--- a/drivers/mtd/maps/Makefile
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+++ b/drivers/mtd/maps/Makefile
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@@ -21,6 +21,7 @@ obj-$(CONFIG_MTD_ICHXROM) += ichxrom.o
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obj-$(CONFIG_MTD_CK804XROM) += ck804xrom.o
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obj-$(CONFIG_MTD_TSUNAMI) += tsunami_flash.o
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obj-$(CONFIG_MTD_LUBBOCK) += lubbock-flash.o
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+obj-$(CONFIG_MTD_GUMSTIX) += gumstix-flash.o
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obj-$(CONFIG_MTD_MAINSTONE) += mainstone-flash.o
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obj-$(CONFIG_MTD_MBX860) += mbx860.o
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obj-$(CONFIG_MTD_CEIVA) += ceiva.o
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