Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 1 | /* |
| 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 Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 14 | #include <linux/slab.h> |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 15 | #include <linux/kernel.h> |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 16 | #include <linux/platform_device.h> |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 17 | #include <linux/mtd/mtd.h> |
| 18 | #include <linux/mtd/map.h> |
| 19 | #include <linux/mtd/partitions.h> |
| 20 | |
| 21 | #include <asm/io.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 22 | #include <mach/hardware.h> |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 23 | |
| 24 | #include <asm/mach/flash.h> |
| 25 | |
Nicolas Pitre | ccaf5f0 | 2009-12-11 02:21:57 +0100 | [diff] [blame] | 26 | #define CACHELINESIZE 32 |
| 27 | |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 28 | static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from, |
| 29 | ssize_t len) |
| 30 | { |
Nicolas Pitre | ccaf5f0 | 2009-12-11 02:21:57 +0100 | [diff] [blame] | 31 | 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 Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | struct pxa2xx_flash_info { |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 43 | struct mtd_info *mtd; |
| 44 | struct map_info map; |
| 45 | }; |
| 46 | |
Artem Bityutskiy | 0984c89 | 2013-03-12 10:46:37 +0200 | [diff] [blame] | 47 | static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL }; |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 48 | |
Bill Pemberton | 06f2551 | 2012-11-19 13:23:07 -0500 | [diff] [blame] | 49 | static int pxa2xx_flash_probe(struct platform_device *pdev) |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 50 | { |
Jingoo Han | d20d5a5 | 2013-07-30 17:18:06 +0900 | [diff] [blame] | 51 | struct flash_platform_data *flash = dev_get_platdata(&pdev->dev); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 52 | struct pxa2xx_flash_info *info; |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 53 | struct resource *res; |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 54 | |
| 55 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 56 | if (!res) |
| 57 | return -ENODEV; |
| 58 | |
Julia Lawall | 2bfefa4 | 2010-05-13 22:03:15 +0200 | [diff] [blame] | 59 | info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 60 | if (!info) |
| 61 | return -ENOMEM; |
| 62 | |
Geert Uytterhoeven | 7c4bb4f | 2013-11-12 20:07:15 +0100 | [diff] [blame] | 63 | info->map.name = flash->name; |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 64 | info->map.bankwidth = flash->width; |
| 65 | info->map.phys = res->start; |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 66 | info->map.size = resource_size(res); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 67 | |
| 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 Biesheuvel | 7769aea | 2016-02-25 08:57:52 +0100 | [diff] [blame] | 74 | info->map.cached = |
| 75 | ioremap_cached(info->map.phys, info->map.size); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 76 | 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 Klaver | 2451581 | 2015-06-10 22:38:33 +0200 | [diff] [blame] | 96 | info->mtd->dev.parent = &pdev->dev; |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 97 | |
Artem Bityutskiy | 42d7fbe | 2012-03-09 19:24:26 +0200 | [diff] [blame] | 98 | mtd_device_parse_register(info->mtd, probes, NULL, flash->parts, |
| 99 | flash->nr_parts); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 100 | |
Ming Lei | 7a192ec | 2009-02-06 23:40:12 +0800 | [diff] [blame] | 101 | platform_set_drvdata(pdev, info); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 102 | return 0; |
| 103 | } |
| 104 | |
Bill Pemberton | 810b7e0 | 2012-11-19 13:26:04 -0500 | [diff] [blame] | 105 | static int pxa2xx_flash_remove(struct platform_device *dev) |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 106 | { |
Ming Lei | 7a192ec | 2009-02-06 23:40:12 +0800 | [diff] [blame] | 107 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 108 | |
Jamie Iles | 3dfad12 | 2011-05-23 10:22:50 +0100 | [diff] [blame] | 109 | mtd_device_unregister(info->mtd); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 110 | |
| 111 | map_destroy(info->mtd); |
| 112 | iounmap(info->map.virt); |
| 113 | if (info->map.cached) |
Ard Biesheuvel | 7769aea | 2016-02-25 08:57:52 +0100 | [diff] [blame] | 114 | iounmap(info->map.cached); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 115 | kfree(info); |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | #ifdef CONFIG_PM |
Ming Lei | 7a192ec | 2009-02-06 23:40:12 +0800 | [diff] [blame] | 120 | static void pxa2xx_flash_shutdown(struct platform_device *dev) |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 121 | { |
Ming Lei | 7a192ec | 2009-02-06 23:40:12 +0800 | [diff] [blame] | 122 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 123 | |
Artem Bityutskiy | 3fe4bae | 2011-12-23 19:25:16 +0200 | [diff] [blame] | 124 | if (info && mtd_suspend(info->mtd) == 0) |
Artem Bityutskiy | ead995f | 2011-12-23 19:31:25 +0200 | [diff] [blame] | 125 | mtd_resume(info->mtd); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 126 | } |
| 127 | #else |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 128 | #define pxa2xx_flash_shutdown NULL |
| 129 | #endif |
| 130 | |
Ming Lei | 7a192ec | 2009-02-06 23:40:12 +0800 | [diff] [blame] | 131 | static struct platform_driver pxa2xx_flash_driver = { |
| 132 | .driver = { |
| 133 | .name = "pxa2xx-flash", |
Ming Lei | 7a192ec | 2009-02-06 23:40:12 +0800 | [diff] [blame] | 134 | }, |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 135 | .probe = pxa2xx_flash_probe, |
Bill Pemberton | 5153b88 | 2012-11-19 13:21:24 -0500 | [diff] [blame] | 136 | .remove = pxa2xx_flash_remove, |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 137 | .shutdown = pxa2xx_flash_shutdown, |
| 138 | }; |
| 139 | |
Axel Lin | f99640d | 2011-11-27 20:45:03 +0800 | [diff] [blame] | 140 | module_platform_driver(pxa2xx_flash_driver); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 141 | |
| 142 | MODULE_LICENSE("GPL"); |
Nicolas Pitre | 2f82af0 | 2009-09-14 03:25:28 -0400 | [diff] [blame] | 143 | MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>"); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 144 | MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx"); |