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> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/init.h> |
| 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> |
| 22 | #include <asm/hardware.h> |
Linus Torvalds | 355aaff | 2007-10-15 12:55:20 -0700 | [diff] [blame^] | 23 | #include <asm/cacheflush.h> |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 24 | |
| 25 | #include <asm/mach/flash.h> |
| 26 | |
| 27 | static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from, |
| 28 | ssize_t len) |
| 29 | { |
Linus Torvalds | 355aaff | 2007-10-15 12:55:20 -0700 | [diff] [blame^] | 30 | flush_ioremap_region(map->phys, map->cached, from, len); |
Todd Poynor | e644f7d | 2005-11-07 21:47:48 +0000 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | struct pxa2xx_flash_info { |
| 34 | struct mtd_partition *parts; |
| 35 | int nr_parts; |
| 36 | struct mtd_info *mtd; |
| 37 | struct map_info map; |
| 38 | }; |
| 39 | |
| 40 | |
| 41 | static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; |
| 42 | |
| 43 | |
| 44 | static int __init pxa2xx_flash_probe(struct device *dev) |
| 45 | { |
| 46 | struct platform_device *pdev = to_platform_device(dev); |
| 47 | struct flash_platform_data *flash = pdev->dev.platform_data; |
| 48 | struct pxa2xx_flash_info *info; |
| 49 | struct mtd_partition *parts; |
| 50 | struct resource *res; |
| 51 | int ret = 0; |
| 52 | |
| 53 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 54 | if (!res) |
| 55 | return -ENODEV; |
| 56 | |
| 57 | info = kmalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL); |
| 58 | if (!info) |
| 59 | return -ENOMEM; |
| 60 | |
| 61 | memset(info, 0, sizeof(struct pxa2xx_flash_info)); |
| 62 | info->map.name = (char *) flash->name; |
| 63 | info->map.bankwidth = flash->width; |
| 64 | info->map.phys = res->start; |
| 65 | info->map.size = res->end - res->start + 1; |
| 66 | info->parts = flash->parts; |
| 67 | info->nr_parts = flash->nr_parts; |
| 68 | |
| 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 | |
| 99 | #ifdef CONFIG_MTD_PARTITIONS |
| 100 | ret = parse_mtd_partitions(info->mtd, probes, &parts, 0); |
| 101 | |
| 102 | if (ret > 0) { |
| 103 | info->nr_parts = ret; |
| 104 | info->parts = parts; |
| 105 | } |
| 106 | #endif |
| 107 | |
| 108 | if (info->nr_parts) { |
| 109 | add_mtd_partitions(info->mtd, info->parts, |
| 110 | info->nr_parts); |
| 111 | } else { |
| 112 | printk("Registering %s as whole device\n", |
| 113 | info->map.name); |
| 114 | add_mtd_device(info->mtd); |
| 115 | } |
| 116 | |
| 117 | dev_set_drvdata(dev, info); |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | static int __exit pxa2xx_flash_remove(struct device *dev) |
| 122 | { |
| 123 | struct pxa2xx_flash_info *info = dev_get_drvdata(dev); |
| 124 | |
| 125 | dev_set_drvdata(dev, NULL); |
| 126 | |
| 127 | #ifdef CONFIG_MTD_PARTITIONS |
| 128 | if (info->nr_parts) |
| 129 | del_mtd_partitions(info->mtd); |
| 130 | else |
| 131 | #endif |
| 132 | del_mtd_device(info->mtd); |
| 133 | |
| 134 | map_destroy(info->mtd); |
| 135 | iounmap(info->map.virt); |
| 136 | if (info->map.cached) |
| 137 | iounmap(info->map.cached); |
| 138 | kfree(info->parts); |
| 139 | kfree(info); |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | #ifdef CONFIG_PM |
| 144 | static int pxa2xx_flash_suspend(struct device *dev, pm_message_t state) |
| 145 | { |
| 146 | struct pxa2xx_flash_info *info = dev_get_drvdata(dev); |
| 147 | int ret = 0; |
| 148 | |
| 149 | if (info->mtd && info->mtd->suspend) |
| 150 | ret = info->mtd->suspend(info->mtd); |
| 151 | return ret; |
| 152 | } |
| 153 | |
| 154 | static int pxa2xx_flash_resume(struct device *dev) |
| 155 | { |
| 156 | struct pxa2xx_flash_info *info = dev_get_drvdata(dev); |
| 157 | |
| 158 | if (info->mtd && info->mtd->resume) |
| 159 | info->mtd->resume(info->mtd); |
| 160 | return 0; |
| 161 | } |
| 162 | static void pxa2xx_flash_shutdown(struct device *dev) |
| 163 | { |
| 164 | struct pxa2xx_flash_info *info = dev_get_drvdata(dev); |
| 165 | |
| 166 | if (info && info->mtd->suspend(info->mtd) == 0) |
| 167 | info->mtd->resume(info->mtd); |
| 168 | } |
| 169 | #else |
| 170 | #define pxa2xx_flash_suspend NULL |
| 171 | #define pxa2xx_flash_resume NULL |
| 172 | #define pxa2xx_flash_shutdown NULL |
| 173 | #endif |
| 174 | |
| 175 | static struct device_driver pxa2xx_flash_driver = { |
| 176 | .name = "pxa2xx-flash", |
| 177 | .bus = &platform_bus_type, |
| 178 | .probe = pxa2xx_flash_probe, |
| 179 | .remove = __exit_p(pxa2xx_flash_remove), |
| 180 | .suspend = pxa2xx_flash_suspend, |
| 181 | .resume = pxa2xx_flash_resume, |
| 182 | .shutdown = pxa2xx_flash_shutdown, |
| 183 | }; |
| 184 | |
| 185 | static int __init init_pxa2xx_flash(void) |
| 186 | { |
| 187 | return driver_register(&pxa2xx_flash_driver); |
| 188 | } |
| 189 | |
| 190 | static void __exit cleanup_pxa2xx_flash(void) |
| 191 | { |
| 192 | driver_unregister(&pxa2xx_flash_driver); |
| 193 | } |
| 194 | |
| 195 | module_init(init_pxa2xx_flash); |
| 196 | module_exit(cleanup_pxa2xx_flash); |
| 197 | |
| 198 | MODULE_LICENSE("GPL"); |
| 199 | MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>"); |
| 200 | MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx"); |