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path: root/drivers/mtd/maps/mainstone-flash.c
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Diffstat (limited to 'drivers/mtd/maps/mainstone-flash.c')
-rw-r--r--drivers/mtd/maps/mainstone-flash.c178
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/mtd/maps/mainstone-flash.c b/drivers/mtd/maps/mainstone-flash.c
new file mode 100644
index 00000000000..87e93fa6058
--- /dev/null
+++ b/drivers/mtd/maps/mainstone-flash.c
@@ -0,0 +1,178 @@
+/*
+ * $Id: $
+ *
+ * Map driver for the Mainstone developer platform.
+ *
+ * Author: Nicolas Pitre
+ * Copyright: (C) 2001 MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/mainstone.h>
+
+
+#define ROM_ADDR 0x00000000
+#define FLASH_ADDR 0x04000000
+
+#define WINDOW_SIZE 0x04000000
+
+static void mainstone_map_inval_cache(struct map_info *map, unsigned long from,
+ ssize_t len)
+{
+ consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE);
+}
+
+static struct map_info mainstone_maps[2] = { {
+ .size = WINDOW_SIZE,
+ .phys = PXA_CS0_PHYS,
+ .inval_cache = mainstone_map_inval_cache,
+}, {
+ .size = WINDOW_SIZE,
+ .phys = PXA_CS1_PHYS,
+ .inval_cache = mainstone_map_inval_cache,
+} };
+
+static struct mtd_partition mainstone_partitions[] = {
+ {
+ .name = "Bootloader",
+ .size = 0x00040000,
+ .offset = 0,
+ .mask_flags = MTD_WRITEABLE /* force read-only */
+ },{
+ .name = "Kernel",
+ .size = 0x00400000,
+ .offset = 0x00040000,
+ },{
+ .name = "Filesystem",
+ .size = MTDPART_SIZ_FULL,
+ .offset = 0x00440000
+ }
+};
+
+static struct mtd_info *mymtds[2];
+static struct mtd_partition *parsed_parts[2];
+static int nr_parsed_parts[2];
+
+static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
+
+static int __init init_mainstone(void)
+{
+ int SW7 = 0; /* FIXME: get from SCR (Mst doc section 3.2.1.1) */
+ int ret = 0, i;
+
+ mainstone_maps[0].bankwidth = (BOOT_DEF & 1) ? 2 : 4;
+ mainstone_maps[1].bankwidth = 4;
+
+ /* Compensate for SW7 which swaps the flash banks */
+ mainstone_maps[SW7].name = "processor flash";
+ mainstone_maps[SW7 ^ 1].name = "main board flash";
+
+ printk(KERN_NOTICE "Mainstone configured to boot from %s\n",
+ mainstone_maps[0].name);
+
+ for (i = 0; i < 2; i++) {
+ mainstone_maps[i].virt = ioremap(mainstone_maps[i].phys,
+ WINDOW_SIZE);
+ if (!mainstone_maps[i].virt) {
+ printk(KERN_WARNING "Failed to ioremap %s\n",
+ mainstone_maps[i].name);
+ if (!ret)
+ ret = -ENOMEM;
+ continue;
+ }
+ mainstone_maps[i].cached =
+ ioremap_cached(mainstone_maps[i].phys, WINDOW_SIZE);
+ if (!mainstone_maps[i].cached)
+ printk(KERN_WARNING "Failed to ioremap cached %s\n",
+ mainstone_maps[i].name);
+ simple_map_init(&mainstone_maps[i]);
+
+ printk(KERN_NOTICE
+ "Probing %s at physical address 0x%08lx"
+ " (%d-bit bankwidth)\n",
+ mainstone_maps[i].name, mainstone_maps[i].phys,
+ mainstone_maps[i].bankwidth * 8);
+
+ mymtds[i] = do_map_probe("cfi_probe", &mainstone_maps[i]);
+
+ if (!mymtds[i]) {
+ iounmap((void *)mainstone_maps[i].virt);
+ if (mainstone_maps[i].cached)
+ iounmap(mainstone_maps[i].cached);
+ if (!ret)
+ ret = -EIO;
+ continue;
+ }
+ mymtds[i]->owner = THIS_MODULE;
+
+ ret = parse_mtd_partitions(mymtds[i], probes,
+ &parsed_parts[i], 0);
+
+ if (ret > 0)
+ nr_parsed_parts[i] = ret;
+ }
+
+ if (!mymtds[0] && !mymtds[1])
+ return ret;
+
+ for (i = 0; i < 2; i++) {
+ if (!mymtds[i]) {
+ printk(KERN_WARNING "%s is absent. Skipping\n",
+ mainstone_maps[i].name);
+ } else if (nr_parsed_parts[i]) {
+ add_mtd_partitions(mymtds[i], parsed_parts[i],
+ nr_parsed_parts[i]);
+ } else if (!i) {
+ printk("Using static partitions on %s\n",
+ mainstone_maps[i].name);
+ add_mtd_partitions(mymtds[i], mainstone_partitions,
+ ARRAY_SIZE(mainstone_partitions));
+ } else {
+ printk("Registering %s as whole device\n",
+ mainstone_maps[i].name);
+ add_mtd_device(mymtds[i]);
+ }
+ }
+ return 0;
+}
+
+static void __exit cleanup_mainstone(void)
+{
+ int i;
+ for (i = 0; i < 2; i++) {
+ if (!mymtds[i])
+ continue;
+
+ if (nr_parsed_parts[i] || !i)
+ del_mtd_partitions(mymtds[i]);
+ else
+ del_mtd_device(mymtds[i]);
+
+ map_destroy(mymtds[i]);
+ iounmap((void *)mainstone_maps[i].virt);
+ if (mainstone_maps[i].cached)
+ iounmap(mainstone_maps[i].cached);
+ kfree(parsed_parts[i]);
+ }
+}
+
+module_init(init_mainstone);
+module_exit(cleanup_mainstone);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>");
+MODULE_DESCRIPTION("MTD map driver for Intel Mainstone");