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> 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 <mach/hardware.h> 23 #include <asm/cacheflush.h> 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 { 30 flush_ioremap_region(map->phys, map->cached, from, len); 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"); 201