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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>
Todd Poynore644f7d2005-11-07 21:47:48 +000016#include <linux/platform_device.h>
Todd Poynore644f7d2005-11-07 21:47:48 +000017#include <linux/mtd/mtd.h>
18#include <linux/mtd/map.h>
19#include <linux/mtd/partitions.h>
20
21#include <asm/io.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010022#include <mach/hardware.h>
Todd Poynore644f7d2005-11-07 21:47:48 +000023
24#include <asm/mach/flash.h>
25
Nicolas Pitreccaf5f02009-12-11 02:21:57 +010026#define CACHELINESIZE 32
27
Todd Poynore644f7d2005-11-07 21:47:48 +000028static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
29 ssize_t len)
30{
Nicolas Pitreccaf5f02009-12-11 02:21:57 +010031 unsigned long start = (unsigned long)map->cached + from;
32 unsigned long end = start + len;
33
34 start &= ~(CACHELINESIZE - 1);
35 while (start < end) {
36 /* invalidate D cache line */
37 asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
38 start += CACHELINESIZE;
39 }
Todd Poynore644f7d2005-11-07 21:47:48 +000040}
41
42struct pxa2xx_flash_info {
Todd Poynore644f7d2005-11-07 21:47:48 +000043 struct mtd_info *mtd;
44 struct map_info map;
45};
46
Artem Bityutskiy0984c892013-03-12 10:46:37 +020047static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL };
Todd Poynore644f7d2005-11-07 21:47:48 +000048
Bill Pemberton06f25512012-11-19 13:23:07 -050049static int pxa2xx_flash_probe(struct platform_device *pdev)
Todd Poynore644f7d2005-11-07 21:47:48 +000050{
Jingoo Hand20d5a52013-07-30 17:18:06 +090051 struct flash_platform_data *flash = dev_get_platdata(&pdev->dev);
Todd Poynore644f7d2005-11-07 21:47:48 +000052 struct pxa2xx_flash_info *info;
Todd Poynore644f7d2005-11-07 21:47:48 +000053 struct resource *res;
Todd Poynore644f7d2005-11-07 21:47:48 +000054
55 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
56 if (!res)
57 return -ENODEV;
58
Julia Lawall2bfefa42010-05-13 22:03:15 +020059 info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
Todd Poynore644f7d2005-11-07 21:47:48 +000060 if (!info)
61 return -ENOMEM;
62
Geert Uytterhoeven7c4bb4f2013-11-12 20:07:15 +010063 info->map.name = flash->name;
Todd Poynore644f7d2005-11-07 21:47:48 +000064 info->map.bankwidth = flash->width;
65 info->map.phys = res->start;
Joe Perches28f65c112011-06-09 09:13:32 -070066 info->map.size = resource_size(res);
Todd Poynore644f7d2005-11-07 21:47:48 +000067
68 info->map.virt = ioremap(info->map.phys, info->map.size);
69 if (!info->map.virt) {
70 printk(KERN_WARNING "Failed to ioremap %s\n",
71 info->map.name);
72 return -ENOMEM;
73 }
Ard Biesheuvel7769aea2016-02-25 08:57:52 +010074 info->map.cached =
75 ioremap_cached(info->map.phys, info->map.size);
Todd Poynore644f7d2005-11-07 21:47:48 +000076 if (!info->map.cached)
77 printk(KERN_WARNING "Failed to ioremap cached %s\n",
78 info->map.name);
79 info->map.inval_cache = pxa2xx_map_inval_cache;
80 simple_map_init(&info->map);
81
82 printk(KERN_NOTICE
83 "Probing %s at physical address 0x%08lx"
84 " (%d-bit bankwidth)\n",
85 info->map.name, (unsigned long)info->map.phys,
86 info->map.bankwidth * 8);
87
88 info->mtd = do_map_probe(flash->map_name, &info->map);
89
90 if (!info->mtd) {
91 iounmap((void *)info->map.virt);
92 if (info->map.cached)
93 iounmap(info->map.cached);
94 return -EIO;
95 }
Frans Klaver24515812015-06-10 22:38:33 +020096 info->mtd->dev.parent = &pdev->dev;
Todd Poynore644f7d2005-11-07 21:47:48 +000097
Artem Bityutskiy42d7fbe2012-03-09 19:24:26 +020098 mtd_device_parse_register(info->mtd, probes, NULL, flash->parts,
99 flash->nr_parts);
Todd Poynore644f7d2005-11-07 21:47:48 +0000100
Ming Lei7a192ec2009-02-06 23:40:12 +0800101 platform_set_drvdata(pdev, info);
Todd Poynore644f7d2005-11-07 21:47:48 +0000102 return 0;
103}
104
Bill Pemberton810b7e02012-11-19 13:26:04 -0500105static int pxa2xx_flash_remove(struct platform_device *dev)
Todd Poynore644f7d2005-11-07 21:47:48 +0000106{
Ming Lei7a192ec2009-02-06 23:40:12 +0800107 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
Todd Poynore644f7d2005-11-07 21:47:48 +0000108
Jamie Iles3dfad122011-05-23 10:22:50 +0100109 mtd_device_unregister(info->mtd);
Todd Poynore644f7d2005-11-07 21:47:48 +0000110
111 map_destroy(info->mtd);
112 iounmap(info->map.virt);
113 if (info->map.cached)
Ard Biesheuvel7769aea2016-02-25 08:57:52 +0100114 iounmap(info->map.cached);
Todd Poynore644f7d2005-11-07 21:47:48 +0000115 kfree(info);
116 return 0;
117}
118
119#ifdef CONFIG_PM
Ming Lei7a192ec2009-02-06 23:40:12 +0800120static void pxa2xx_flash_shutdown(struct platform_device *dev)
Todd Poynore644f7d2005-11-07 21:47:48 +0000121{
Ming Lei7a192ec2009-02-06 23:40:12 +0800122 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
Todd Poynore644f7d2005-11-07 21:47:48 +0000123
Artem Bityutskiy3fe4bae2011-12-23 19:25:16 +0200124 if (info && mtd_suspend(info->mtd) == 0)
Artem Bityutskiyead995f2011-12-23 19:31:25 +0200125 mtd_resume(info->mtd);
Todd Poynore644f7d2005-11-07 21:47:48 +0000126}
127#else
Todd Poynore644f7d2005-11-07 21:47:48 +0000128#define pxa2xx_flash_shutdown NULL
129#endif
130
Ming Lei7a192ec2009-02-06 23:40:12 +0800131static struct platform_driver pxa2xx_flash_driver = {
132 .driver = {
133 .name = "pxa2xx-flash",
Ming Lei7a192ec2009-02-06 23:40:12 +0800134 },
Todd Poynore644f7d2005-11-07 21:47:48 +0000135 .probe = pxa2xx_flash_probe,
Bill Pemberton5153b882012-11-19 13:21:24 -0500136 .remove = pxa2xx_flash_remove,
Todd Poynore644f7d2005-11-07 21:47:48 +0000137 .shutdown = pxa2xx_flash_shutdown,
138};
139
Axel Linf99640d2011-11-27 20:45:03 +0800140module_platform_driver(pxa2xx_flash_driver);
Todd Poynore644f7d2005-11-07 21:47:48 +0000141
142MODULE_LICENSE("GPL");
Nicolas Pitre2f82af02009-09-14 03:25:28 -0400143MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>");
Todd Poynore644f7d2005-11-07 21:47:48 +0000144MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");