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Todd Poynore644f7d2005-11-07 21:47:48 +00001/*
2 * Map driver for Intel XScale PXA2xx platforms.
3 *
4 * Author: Nicolas Pitre
5 * Copyright: (C) 2001 MontaVista Software Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/module.h>
13#include <linux/types.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Todd Poynore644f7d2005-11-07 21:47:48 +000015#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/platform_device.h>
Todd Poynore644f7d2005-11-07 21:47:48 +000018#include <linux/mtd/mtd.h>
19#include <linux/mtd/map.h>
20#include <linux/mtd/partitions.h>
21
22#include <asm/io.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010023#include <mach/hardware.h>
Todd Poynore644f7d2005-11-07 21:47:48 +000024
25#include <asm/mach/flash.h>
26
Nicolas Pitreccaf5f02009-12-11 02:21:57 +010027#define CACHELINESIZE 32
28
Todd Poynore644f7d2005-11-07 21:47:48 +000029static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
30 ssize_t len)
31{
Nicolas Pitreccaf5f02009-12-11 02:21:57 +010032 unsigned long start = (unsigned long)map->cached + from;
33 unsigned long end = start + len;
34
35 start &= ~(CACHELINESIZE - 1);
36 while (start < end) {
37 /* invalidate D cache line */
38 asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
39 start += CACHELINESIZE;
40 }
Todd Poynore644f7d2005-11-07 21:47:48 +000041}
42
43struct pxa2xx_flash_info {
Todd Poynore644f7d2005-11-07 21:47:48 +000044 struct mtd_info *mtd;
45 struct map_info map;
46};
47
Artem Bityutskiy0984c892013-03-12 10:46:37 +020048static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL };
Todd Poynore644f7d2005-11-07 21:47:48 +000049
Bill Pemberton06f25512012-11-19 13:23:07 -050050static int pxa2xx_flash_probe(struct platform_device *pdev)
Todd Poynore644f7d2005-11-07 21:47:48 +000051{
Jingoo Hand20d5a52013-07-30 17:18:06 +090052 struct flash_platform_data *flash = dev_get_platdata(&pdev->dev);
Todd Poynore644f7d2005-11-07 21:47:48 +000053 struct pxa2xx_flash_info *info;
Todd Poynore644f7d2005-11-07 21:47:48 +000054 struct resource *res;
Todd Poynore644f7d2005-11-07 21:47:48 +000055
56 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
57 if (!res)
58 return -ENODEV;
59
Julia Lawall2bfefa42010-05-13 22:03:15 +020060 info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
Todd Poynore644f7d2005-11-07 21:47:48 +000061 if (!info)
62 return -ENOMEM;
63
Geert Uytterhoeven7c4bb4f2013-11-12 20:07:15 +010064 info->map.name = flash->name;
Todd Poynore644f7d2005-11-07 21:47:48 +000065 info->map.bankwidth = flash->width;
66 info->map.phys = res->start;
Joe Perches28f65c112011-06-09 09:13:32 -070067 info->map.size = resource_size(res);
Todd Poynore644f7d2005-11-07 21:47:48 +000068
69 info->map.virt = ioremap(info->map.phys, info->map.size);
70 if (!info->map.virt) {
71 printk(KERN_WARNING "Failed to ioremap %s\n",
72 info->map.name);
73 return -ENOMEM;
74 }
75 info->map.cached =
76 ioremap_cached(info->map.phys, info->map.size);
77 if (!info->map.cached)
78 printk(KERN_WARNING "Failed to ioremap cached %s\n",
79 info->map.name);
80 info->map.inval_cache = pxa2xx_map_inval_cache;
81 simple_map_init(&info->map);
82
83 printk(KERN_NOTICE
84 "Probing %s at physical address 0x%08lx"
85 " (%d-bit bankwidth)\n",
86 info->map.name, (unsigned long)info->map.phys,
87 info->map.bankwidth * 8);
88
89 info->mtd = do_map_probe(flash->map_name, &info->map);
90
91 if (!info->mtd) {
92 iounmap((void *)info->map.virt);
93 if (info->map.cached)
94 iounmap(info->map.cached);
95 return -EIO;
96 }
97 info->mtd->owner = THIS_MODULE;
98
Artem Bityutskiy42d7fbe2012-03-09 19:24:26 +020099 mtd_device_parse_register(info->mtd, probes, NULL, flash->parts,
100 flash->nr_parts);
Todd Poynore644f7d2005-11-07 21:47:48 +0000101
Ming Lei7a192ec2009-02-06 23:40:12 +0800102 platform_set_drvdata(pdev, info);
Todd Poynore644f7d2005-11-07 21:47:48 +0000103 return 0;
104}
105
Bill Pemberton810b7e02012-11-19 13:26:04 -0500106static int pxa2xx_flash_remove(struct platform_device *dev)
Todd Poynore644f7d2005-11-07 21:47:48 +0000107{
Ming Lei7a192ec2009-02-06 23:40:12 +0800108 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
Todd Poynore644f7d2005-11-07 21:47:48 +0000109
Jamie Iles3dfad122011-05-23 10:22:50 +0100110 mtd_device_unregister(info->mtd);
Todd Poynore644f7d2005-11-07 21:47:48 +0000111
112 map_destroy(info->mtd);
113 iounmap(info->map.virt);
114 if (info->map.cached)
115 iounmap(info->map.cached);
Todd Poynore644f7d2005-11-07 21:47:48 +0000116 kfree(info);
117 return 0;
118}
119
120#ifdef CONFIG_PM
Ming Lei7a192ec2009-02-06 23:40:12 +0800121static void pxa2xx_flash_shutdown(struct platform_device *dev)
Todd Poynore644f7d2005-11-07 21:47:48 +0000122{
Ming Lei7a192ec2009-02-06 23:40:12 +0800123 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
Todd Poynore644f7d2005-11-07 21:47:48 +0000124
Artem Bityutskiy3fe4bae2011-12-23 19:25:16 +0200125 if (info && mtd_suspend(info->mtd) == 0)
Artem Bityutskiyead995f2011-12-23 19:31:25 +0200126 mtd_resume(info->mtd);
Todd Poynore644f7d2005-11-07 21:47:48 +0000127}
128#else
Todd Poynore644f7d2005-11-07 21:47:48 +0000129#define pxa2xx_flash_shutdown NULL
130#endif
131
Ming Lei7a192ec2009-02-06 23:40:12 +0800132static struct platform_driver pxa2xx_flash_driver = {
133 .driver = {
134 .name = "pxa2xx-flash",
135 .owner = THIS_MODULE,
136 },
Todd Poynore644f7d2005-11-07 21:47:48 +0000137 .probe = pxa2xx_flash_probe,
Bill Pemberton5153b882012-11-19 13:21:24 -0500138 .remove = pxa2xx_flash_remove,
Todd Poynore644f7d2005-11-07 21:47:48 +0000139 .shutdown = pxa2xx_flash_shutdown,
140};
141
Axel Linf99640d2011-11-27 20:45:03 +0800142module_platform_driver(pxa2xx_flash_driver);
Todd Poynore644f7d2005-11-07 21:47:48 +0000143
144MODULE_LICENSE("GPL");
Nicolas Pitre2f82af02009-09-14 03:25:28 -0400145MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>");
Todd Poynore644f7d2005-11-07 21:47:48 +0000146MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");