4  * MTD Map file for IXP4XX based systems. Please do not make per-board
6  * platform level code in arch/arm/mach-ixp4xx/board-setup.c
12  * Copyright (C) 2003-2004 MontaVista Software, Inc.
38  * When the cpu is in little-endian mode it swizzles the address lines
45  *     +---+---+
47  *     +---+---+
49  *     +---+---+
52  * data and other flash commands which are always in D7-D0.
91 	val.x[0] = flash_read16(map->virt + ofs);  in ixp4xx_read16()
96  * The IXP4xx expansion bus only allows 16-bit wide acceses
97  * when attached to a 16-bit wide device (such as the 28F128J3A),
104 	void __iomem *src = map->virt + from;  in ixp4xx_copy_from()
110 		*dest++ = BYTE1(flash_read16(src-1));  in ixp4xx_copy_from()
112 		--len;  in ixp4xx_copy_from()
120 		len -= 2;  in ixp4xx_copy_from()
128  * Unaligned writes are ignored, causing the 8-bit
129  * probe to fail and proceed to the 16-bit probe (which succeeds).
134 		flash_write16(d.x[0], map->virt + adr);  in ixp4xx_probe_write16()
138  * Fast write16 function without the probing check above
142 	flash_write16(d.x[0], map->virt + adr);  in ixp4xx_write16()
155 	struct flash_platform_data *plat = dev->dev.platform_data;  in ixp4xx_flash_remove()
163 	if (info->mtd) {  in ixp4xx_flash_remove()
164 		mtd_device_unregister(info->mtd);  in ixp4xx_flash_remove()
165 		map_destroy(info->mtd);  in ixp4xx_flash_remove()
167 	if (info->map.virt)  in ixp4xx_flash_remove()
168 		iounmap(info->map.virt);  in ixp4xx_flash_remove()
170 	if (info->res) {  in ixp4xx_flash_remove()
171 		release_resource(info->res);  in ixp4xx_flash_remove()
172 		kfree(info->res);  in ixp4xx_flash_remove()
175 	if (plat->exit)  in ixp4xx_flash_remove()
176 		plat->exit();  in ixp4xx_flash_remove()
183 	struct flash_platform_data *plat = dev->dev.platform_data;  in ixp4xx_flash_probe()
185 	int err = -1;  in ixp4xx_flash_probe()
188 		return -ENODEV;  in ixp4xx_flash_probe()
190 	if (plat->init) {  in ixp4xx_flash_probe()
191 		err = plat->init();  in ixp4xx_flash_probe()
198 		err = -ENOMEM;  in ixp4xx_flash_probe()
208 	info->map.phys = NO_XIP;  in ixp4xx_flash_probe()
209 	info->map.size = resource_size(dev->resource);  in ixp4xx_flash_probe()
212 	 * We only support 16-bit accesses for now. If and when  in ixp4xx_flash_probe()
213 	 * any board use 8-bit access, we'll fixup the driver to  in ixp4xx_flash_probe()
216 	info->map.bankwidth = 2;  in ixp4xx_flash_probe()
217 	info->map.name = dev_name(&dev->dev);  in ixp4xx_flash_probe()
218 	info->map.read = ixp4xx_read16;  in ixp4xx_flash_probe()
219 	info->map.write = ixp4xx_probe_write16;  in ixp4xx_flash_probe()
220 	info->map.copy_from = ixp4xx_copy_from;  in ixp4xx_flash_probe()
222 	info->res = request_mem_region(dev->resource->start,  in ixp4xx_flash_probe()
223 			resource_size(dev->resource),  in ixp4xx_flash_probe()
225 	if (!info->res) {  in ixp4xx_flash_probe()
227 		err = -ENOMEM;  in ixp4xx_flash_probe()
231 	info->map.virt = ioremap(dev->resource->start,  in ixp4xx_flash_probe()
232 				 resource_size(dev->resource));  in ixp4xx_flash_probe()
233 	if (!info->map.virt) {  in ixp4xx_flash_probe()
235 		err = -EIO;  in ixp4xx_flash_probe()
239 	info->mtd = do_map_probe(plat->map_name, &info->map);  in ixp4xx_flash_probe()
240 	if (!info->mtd) {  in ixp4xx_flash_probe()
242 		err = -ENXIO;  in ixp4xx_flash_probe()
245 	info->mtd->owner = THIS_MODULE;  in ixp4xx_flash_probe()
247 	/* Use the fast version */  in ixp4xx_flash_probe()
248 	info->map.write = ixp4xx_write16;  in ixp4xx_flash_probe()
250 	err = mtd_device_parse_register(info->mtd, probes, dev->resource->start,  in ixp4xx_flash_probe()
251 			plat->parts, plat->nr_parts);  in ixp4xx_flash_probe()
268 		.name	= "IXP4XX-Flash",
278 MODULE_ALIAS("platform:IXP4XX-Flash");