[MTD] Add mapping driver for Intel PXA27x Mainstone board flash.
From: Nicolas Pitre <nico@cam.org> Signed-off-by: Todd Poynor <tpoynor@mvista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Nico Pitre
Thomas Gleixner
parent
ba9fb37ba0
commit
cbec19aeb3
3 changed files with 189 additions and 2 deletions
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@ -1,5 +1,5 @@
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# drivers/mtd/maps/Kconfig
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# $Id: Kconfig,v 1.51 2005/03/18 02:07:22 gleixner Exp $
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# $Id: Kconfig,v 1.54 2005/06/30 22:41:36 tpoynor Exp $
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menu "Mapping drivers for chip access"
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depends on MTD!=n
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@ -129,6 +129,14 @@ config MTD_LUBBOCK
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This provides a driver for the on-board flash of the Intel
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'Lubbock' XScale evaluation board.
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config MTD_MAINSTONE
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tristate "CFI Flash device mapped on Intel Mainstone XScale eval board"
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depends on MACH_MAINSTONE && MTD_CFI_INTELEXT
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select MTD_PARTITIONS
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help
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This provides a driver for the on-board flash of the Intel
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'Mainstone PXA27x evaluation board.
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config MTD_OCTAGON
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tristate "JEDEC Flash device mapped on Octagon 5066 SBC"
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depends on X86 && MTD_JEDEC && MTD_COMPLEX_MAPPINGS
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@ -1,7 +1,7 @@
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#
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# linux/drivers/maps/Makefile
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#
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# $Id: Makefile.common,v 1.26 2005/03/02 14:51:04 dvrabel Exp $
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# $Id: Makefile.common,v 1.29 2005/06/30 22:41:36 tpoynor Exp $
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ifeq ($(CONFIG_MTD_COMPLEX_MAPPINGS),y)
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obj-$(CONFIG_MTD) += map_funcs.o
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@ -22,6 +22,7 @@ obj-$(CONFIG_MTD_AMD76XROM) += amd76xrom.o
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obj-$(CONFIG_MTD_ICHXROM) += ichxrom.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-$(CONFIG_MTD_MAINSTONE) += mainstone-flash.o
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obj-$(CONFIG_MTD_MBX860) += mbx860.o
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obj-$(CONFIG_MTD_CEIVA) += ceiva.o
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obj-$(CONFIG_MTD_OCTAGON) += octagon-5066.o
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178
drivers/mtd/maps/mainstone-flash.c
Normal file
178
drivers/mtd/maps/mainstone-flash.c
Normal file
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@ -0,0 +1,178 @@
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/*
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* $Id: $
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*
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* Map driver for the Mainstone developer platform.
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*
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* Author: Nicolas Pitre
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* Copyright: (C) 2001 MontaVista Software Inc.
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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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#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/dma-mapping.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/pxa-regs.h>
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#include <asm/arch/mainstone.h>
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#define ROM_ADDR 0x00000000
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#define FLASH_ADDR 0x04000000
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#define WINDOW_SIZE 0x04000000
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static void mainstone_map_inval_cache(struct map_info *map, unsigned long from,
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ssize_t len)
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{
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consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE);
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}
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static struct map_info mainstone_maps[2] = { {
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.size = WINDOW_SIZE,
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.phys = PXA_CS0_PHYS,
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.inval_cache = mainstone_map_inval_cache,
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}, {
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.size = WINDOW_SIZE,
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.phys = PXA_CS1_PHYS,
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.inval_cache = mainstone_map_inval_cache,
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} };
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static struct mtd_partition mainstone_partitions[] = {
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{
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.name = "Bootloader",
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.size = 0x00040000,
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.offset = 0,
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.mask_flags = MTD_WRITEABLE /* force read-only */
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},{
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.name = "Kernel",
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.size = 0x00400000,
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.offset = 0x00040000,
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},{
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.name = "Filesystem",
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.size = MTDPART_SIZ_FULL,
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.offset = 0x00440000
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}
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};
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static struct mtd_info *mymtds[2];
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static struct mtd_partition *parsed_parts[2];
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static int nr_parsed_parts[2];
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static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
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static int __init init_mainstone(void)
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{
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int SW7 = 0; /* FIXME: get from SCR (Mst doc section 3.2.1.1) */
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int ret = 0, i;
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mainstone_maps[0].bankwidth = (BOOT_DEF & 1) ? 2 : 4;
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mainstone_maps[1].bankwidth = 4;
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/* Compensate for SW7 which swaps the flash banks */
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mainstone_maps[SW7].name = "processor flash";
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mainstone_maps[SW7 ^ 1].name = "main board flash";
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printk(KERN_NOTICE "Mainstone configured to boot from %s\n",
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mainstone_maps[0].name);
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for (i = 0; i < 2; i++) {
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mainstone_maps[i].virt = ioremap(mainstone_maps[i].phys,
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WINDOW_SIZE);
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if (!mainstone_maps[i].virt) {
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printk(KERN_WARNING "Failed to ioremap %s\n",
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mainstone_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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mainstone_maps[i].cached =
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ioremap_cached(mainstone_maps[i].phys, WINDOW_SIZE);
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if (!mainstone_maps[i].cached)
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printk(KERN_WARNING "Failed to ioremap cached %s\n",
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mainstone_maps[i].name);
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simple_map_init(&mainstone_maps[i]);
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printk(KERN_NOTICE
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"Probing %s at physical address 0x%08lx"
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" (%d-bit bankwidth)\n",
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mainstone_maps[i].name, mainstone_maps[i].phys,
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mainstone_maps[i].bankwidth * 8);
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mymtds[i] = do_map_probe("cfi_probe", &mainstone_maps[i]);
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if (!mymtds[i]) {
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iounmap((void *)mainstone_maps[i].virt);
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if (mainstone_maps[i].cached)
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iounmap(mainstone_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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ret = parse_mtd_partitions(mymtds[i], probes,
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&parsed_parts[i], 0);
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if (ret > 0)
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nr_parsed_parts[i] = ret;
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}
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if (!mymtds[0] && !mymtds[1])
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return ret;
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for (i = 0; i < 2; i++) {
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if (!mymtds[i]) {
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printk(KERN_WARNING "%s is absent. Skipping\n",
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mainstone_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],
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nr_parsed_parts[i]);
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} else if (!i) {
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printk("Using static partitions on %s\n",
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mainstone_maps[i].name);
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add_mtd_partitions(mymtds[i], mainstone_partitions,
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ARRAY_SIZE(mainstone_partitions));
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} else {
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printk("Registering %s as whole device\n",
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mainstone_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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static void __exit cleanup_mainstone(void)
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{
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int i;
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for (i = 0; i < 2; i++) {
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if (!mymtds[i])
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continue;
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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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map_destroy(mymtds[i]);
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iounmap((void *)mainstone_maps[i].virt);
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if (mainstone_maps[i].cached)
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iounmap(mainstone_maps[i].cached);
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kfree(parsed_parts[i]);
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}
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}
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module_init(init_mainstone);
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module_exit(cleanup_mainstone);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>");
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MODULE_DESCRIPTION("MTD map driver for Intel Mainstone");
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