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Jonas Gorski
70a3c167c4
Recent BCM63XX devices support a variety of flash types (parallel, SPI, NAND) and share the partition layout. To prevent code duplication make the CFE partition parsing code a stand alone mtd parser to allow SPI or NAND flash drivers to use it. Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> Acked-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/*
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* Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org>
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* Mike Albon <malbon@openwrt.org>
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* Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#define BCM63XX_BUSWIDTH 2 /* Buswidth */
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static struct mtd_info *bcm963xx_mtd_info;
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static struct map_info bcm963xx_map = {
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.name = "bcm963xx",
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.bankwidth = BCM63XX_BUSWIDTH,
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};
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static const char *part_types[] = { "bcm63xxpart", NULL };
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static int bcm963xx_probe(struct platform_device *pdev)
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{
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int err = 0;
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struct resource *r;
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!r) {
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dev_err(&pdev->dev, "no resource supplied\n");
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return -ENODEV;
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}
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bcm963xx_map.phys = r->start;
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bcm963xx_map.size = resource_size(r);
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bcm963xx_map.virt = ioremap(r->start, resource_size(r));
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if (!bcm963xx_map.virt) {
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dev_err(&pdev->dev, "failed to ioremap\n");
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return -EIO;
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}
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dev_info(&pdev->dev, "0x%08lx at 0x%08x\n",
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bcm963xx_map.size, bcm963xx_map.phys);
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simple_map_init(&bcm963xx_map);
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bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map);
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if (!bcm963xx_mtd_info) {
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dev_err(&pdev->dev, "failed to probe using CFI\n");
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bcm963xx_mtd_info = do_map_probe("jedec_probe", &bcm963xx_map);
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if (bcm963xx_mtd_info)
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goto probe_ok;
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dev_err(&pdev->dev, "failed to probe using JEDEC\n");
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err = -EIO;
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goto err_probe;
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}
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probe_ok:
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bcm963xx_mtd_info->owner = THIS_MODULE;
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return mtd_device_parse_register(bcm963xx_mtd_info, part_types, NULL,
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NULL, 0);
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err_probe:
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iounmap(bcm963xx_map.virt);
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return err;
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}
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static int bcm963xx_remove(struct platform_device *pdev)
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{
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if (bcm963xx_mtd_info) {
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mtd_device_unregister(bcm963xx_mtd_info);
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map_destroy(bcm963xx_mtd_info);
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}
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if (bcm963xx_map.virt) {
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iounmap(bcm963xx_map.virt);
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bcm963xx_map.virt = 0;
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}
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return 0;
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}
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static struct platform_driver bcm63xx_mtd_dev = {
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.probe = bcm963xx_probe,
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.remove = bcm963xx_remove,
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.driver = {
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.name = "bcm963xx-flash",
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.owner = THIS_MODULE,
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},
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};
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module_platform_driver(bcm63xx_mtd_dev);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Broadcom BCM63xx MTD driver for CFE and RedBoot");
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MODULE_AUTHOR("Daniel Dickinson <openwrt@cshore.neomailbox.net>");
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MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
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MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");
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