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MTD map support for pxa27x on the EZX
diff -Nru --exclude-from=/sunbeam/home/laforge/scripts/dontdiff linux-2.6.16.5/drivers/mtd/maps/Kconfig linux-2.6.16.5-exz/drivers/mtd/maps/Kconfig
--- linux-2.6.16.5/drivers/mtd/maps/Kconfig 2006-04-12 22:27:57.000000000 +0200
+++ linux-2.6.16.5-exz/drivers/mtd/maps/Kconfig 2006-04-16 22:31:41.000000000 +0200
@@ -621,6 +621,13 @@
help
This enables access to the flash chip on the Sharp SL Series of PDAs.
+config MTD_PXA27x
+ bool "Map driver for Intel PXA27x"
+ depends on MTD && ARCH_PXA
+ help
+ This enables access to the flash chip on the Intel PXA27x
+
+
config MTD_PLATRAM
tristate "Map driver for platform device RAM (mtd-ram)"
depends on MTD
diff -Nru --exclude-from=/sunbeam/home/laforge/scripts/dontdiff linux-2.6.16.5/drivers/mtd/maps/Makefile linux-2.6.16.5-exz/drivers/mtd/maps/Makefile
--- linux-2.6.16.5/drivers/mtd/maps/Makefile 2006-04-12 22:27:57.000000000 +0200
+++ linux-2.6.16.5-exz/drivers/mtd/maps/Makefile 2006-04-16 22:30:56.000000000 +0200
@@ -71,3 +71,4 @@
obj-$(CONFIG_MTD_OMAP_NOR) += omap_nor.o
obj-$(CONFIG_MTD_MTX1) += mtx-1_flash.o
obj-$(CONFIG_MTD_TQM834x) += tqm834x.o
+obj-$(CONFIG_MTD_PXA27x) += pxa27x.o
diff -Nru --exclude-from=/sunbeam/home/laforge/scripts/dontdiff linux-2.6.16.5/drivers/mtd/maps/pxa27x.c linux-2.6.16.5-exz/drivers/mtd/maps/pxa27x.c
--- linux-2.6.16.5/drivers/mtd/maps/pxa27x.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.16.5-exz/drivers/mtd/maps/pxa27x.c 2006-04-16 22:53:13.000000000 +0200
@@ -0,0 +1,187 @@
+/*
+ * $Id: $
+ *
+ * Map driver for the PXA27x
+ *
+ * Author: Harald Welte
+ * 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/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.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 WINDOW_ADDR 0x0
+#define WINDOW_SIZE (32*1024*1024)
+#define WINDOW_CACHE_ADDR 0x0
+#define WINDOW_CACHE_SIZE 0x1a00000
+
+static void pxa27x_map_inval_cache(struct map_info *map, unsigned long from,
+ ssize_t len)
+{
+ unsigned long endaddress, i, j;
+
+ /* FIXME: can this be replaced by consistent_sync? */
+
+ endaddress = from + len -1;
+ from &= ~(32-1);
+ endaddress &= ~(32-1);
+ for (i = from; i <= endaddress; i += 32)
+ asm("mcr p15, 0, %0, c7, c6, 1"::"r"(i));
+
+ asm( "mrc p15, 0, %0, c2, c0, 0\n"
+ "mov %0, %0\n"
+ "sub pc, pc #4"
+ :"=r"(j));
+}
+
+
+struct map_info pxa27x_map = {
+ .name = "PXA27x flash",
+ .size = WINDOW_SIZE,
+ .phys = WINDOW_ADDR,
+ .inval_cache = &pxa27x_map_inval_cache,
+};
+
+#if defined (CONFIG_PXA_EZX_A780) || defined (CONFIG_PXA_EZX_E680)
+static struct mtd_partition pxa27x_partitions[] = {
+ {
+ .name = "Bootloader",
+ .size = 0x00020000,
+ .offset = 0,
+ .mask_flags = MTD_WRITEABLE,
+ }, {
+ .name = "Kernel",
+ .size = 0x000e0000,
+ .offset = 0x00020000,
+ } , {
+ .name = "rootfs",
+ .size = 0x018e0000,
+ .offset = 0x00120000,
+ } , {
+ .name = "VFM_Filesystem",
+ .size = 0x00580000,
+ .offset = 0x01a00000,
+ } , {
+ .name = "setup",
+ .size = 0x00020000,
+ .offset = 0x01fa0000,
+ } , {
+ .name = "Logo",
+ .size = 0x00020000,
+ .offset = 0x01fc0000,
+ },
+};
+#else
+#error "please define partition for this PXA27x implementation"
+#endif
+
+
+static struct mtd_info *mymtd;
+static struct mtd_partition *parsed_parts;
+
+static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
+
+static int __init init_pxa27x(void)
+{
+ struct mtd_partition *parts;
+ int nb_parts = 0;
+ int parsed_nr_parts = 0;
+ char *part_type = "static";
+
+ pxa27x_map.bankwidth = (BOOT_DEF & 1) ? 2 : 4;
+
+ printk("Probing PXA27x flash at physical address 0x%08x (%d-bit bankwidth)\n",
+ WINDOW_ADDR, pxa27x_map.bankwidth * 8);
+ pxa27x_map.virt = ioremap(pxa27x_map.phys, pxa27x_map.size);
+
+ if (!pxa27x_map.virt) {
+ printk("Failed to ioremap\n");
+ return -EIO;
+ }
+
+ mymtd = do_map_probe("cfi_probe", &pxa27x_map);
+ if (!mymtd) {
+ iounmap((void *)pxa27x_map.virt);
+ return -ENXIO;
+ }
+ mymtd->owner = THIS_MODULE;
+
+#if 0
+ /* ioremap the first flash chip as cacheable */
+ pxa27x_map.cached = ioremap_cached(pxa27x_map.phys, pxa27x_map.size);
+ if (!pxa27x_map.cached) {
+ printk("Failed to do cacheable-ioremap\n");
+ iounmap((void *)pxa27x_map.virt);
+ return -EIO;
+ }
+#endif
+ simple_map_init(&pxa27x_map);
+
+ if (parsed_nr_parts == 0) {
+ int ret = parse_mtd_partitions(mymtd, probes, &parsed_parts, 0);
+
+ if (ret > 0) {
+ part_type = "RedBoot";
+ parsed_nr_parts = ret;
+ }
+ }
+
+ if (parsed_nr_parts > 0) {
+ parts = parsed_parts;
+ nb_parts = parsed_nr_parts;
+ } else {
+ parts = pxa27x_partitions;
+ nb_parts = ARRAY_SIZE(pxa27x_partitions);
+ }
+
+ if (nb_parts) {
+ printk(KERN_NOTICE "Using %s partition definition\n", part_type);
+ add_mtd_partitions(mymtd, parts, nb_parts);
+ } else {
+ add_mtd_device(mymtd);
+ }
+#if 0
+ if (ret = ezx_partition_init())
+#endif
+ return 0;
+}
+
+static void __exit cleanup_pxa27x(void)
+{
+ if (mymtd) {
+ del_mtd_partitions(mymtd);
+ map_destroy(mymtd);
+ if (parsed_parts)
+ kfree(parsed_parts);
+ }
+ if (pxa27x_map.virt)
+ iounmap((void *)pxa27x_map.virt);
+ if (pxa27x_map.cached)
+ iounmap((void *)pxa27x_map.cached);
+ return;
+}
+
+module_init(init_pxa27x);
+module_exit(cleanup_pxa27x);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
+MODULE_DESCRIPTION("MTD map driver for Intel PXA27x");
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