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 platform_device *pdev) 45 { 46 struct flash_platform_data *flash = pdev->dev.platform_data; 47 struct pxa2xx_flash_info *info; 48 struct mtd_partition *parts; 49 struct resource *res; 50 int ret = 0; 51 52 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 53 if (!res) 54 return -ENODEV; 55 56 info = kmalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL); 57 if (!info) 58 return -ENOMEM; 59 60 memset(info, 0, sizeof(struct pxa2xx_flash_info)); 61 info->map.name = (char *) flash->name; 62 info->map.bankwidth = flash->width; 63 info->map.phys = res->start; 64 info->map.size = res->end - res->start + 1; 65 info->parts = flash->parts; 66 info->nr_parts = flash->nr_parts; 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 } 74 info->map.cached = 75 ioremap_cached(info->map.phys, info->map.size); 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 } 96 info->mtd->owner = THIS_MODULE; 97 98 #ifdef CONFIG_MTD_PARTITIONS 99 ret = parse_mtd_partitions(info->mtd, probes, &parts, 0); 100 101 if (ret > 0) { 102 info->nr_parts = ret; 103 info->parts = parts; 104 } 105 #endif 106 107 if (info->nr_parts) { 108 add_mtd_partitions(info->mtd, info->parts, 109 info->nr_parts); 110 } else { 111 printk("Registering %s as whole device\n", 112 info->map.name); 113 add_mtd_device(info->mtd); 114 } 115 116 platform_set_drvdata(pdev, info); 117 return 0; 118 } 119 120 static int __devexit pxa2xx_flash_remove(struct platform_device *dev) 121 { 122 struct pxa2xx_flash_info *info = platform_get_drvdata(dev); 123 124 platform_set_drvdata(dev, NULL); 125 126 #ifdef CONFIG_MTD_PARTITIONS 127 if (info->nr_parts) 128 del_mtd_partitions(info->mtd); 129 else 130 #endif 131 del_mtd_device(info->mtd); 132 133 map_destroy(info->mtd); 134 iounmap(info->map.virt); 135 if (info->map.cached) 136 iounmap(info->map.cached); 137 kfree(info->parts); 138 kfree(info); 139 return 0; 140 } 141 142 #ifdef CONFIG_PM 143 static int pxa2xx_flash_suspend(struct platform_device *dev, pm_message_t state) 144 { 145 struct pxa2xx_flash_info *info = platform_get_drvdata(dev); 146 int ret = 0; 147 148 if (info->mtd && info->mtd->suspend) 149 ret = info->mtd->suspend(info->mtd); 150 return ret; 151 } 152 153 static int pxa2xx_flash_resume(struct platform_device *dev) 154 { 155 struct pxa2xx_flash_info *info = platform_get_drvdata(dev); 156 157 if (info->mtd && info->mtd->resume) 158 info->mtd->resume(info->mtd); 159 return 0; 160 } 161 static void pxa2xx_flash_shutdown(struct platform_device *dev) 162 { 163 struct pxa2xx_flash_info *info = platform_get_drvdata(dev); 164 165 if (info && info->mtd->suspend(info->mtd) == 0) 166 info->mtd->resume(info->mtd); 167 } 168 #else 169 #define pxa2xx_flash_suspend NULL 170 #define pxa2xx_flash_resume NULL 171 #define pxa2xx_flash_shutdown NULL 172 #endif 173 174 static struct platform_driver pxa2xx_flash_driver = { 175 .driver = { 176 .name = "pxa2xx-flash", 177 .owner = THIS_MODULE, 178 }, 179 .probe = pxa2xx_flash_probe, 180 .remove = __devexit_p(pxa2xx_flash_remove), 181 .suspend = pxa2xx_flash_suspend, 182 .resume = pxa2xx_flash_resume, 183 .shutdown = pxa2xx_flash_shutdown, 184 }; 185 186 static int __init init_pxa2xx_flash(void) 187 { 188 return platform_driver_register(&pxa2xx_flash_driver); 189 } 190 191 static void __exit cleanup_pxa2xx_flash(void) 192 { 193 platform_driver_unregister(&pxa2xx_flash_driver); 194 } 195 196 module_init(init_pxa2xx_flash); 197 module_exit(cleanup_pxa2xx_flash); 198 199 MODULE_LICENSE("GPL"); 200 MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>"); 201 MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx"); 202