2005-04-16 18:20:36 -04:00
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/*
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* Flash memory access on SA11x0 based devices
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2005-11-07 06:15:40 -05:00
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*
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2005-04-16 18:20:36 -04:00
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* (C) 2000 Nicolas Pitre <nico@cam.org>
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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2005-10-29 14:07:23 -04:00
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#include <linux/platform_device.h>
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2005-04-16 18:20:36 -04:00
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#include <linux/err.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/concat.h>
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2008-08-05 11:14:15 -04:00
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#include <mach/hardware.h>
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2005-04-16 18:20:36 -04:00
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#include <asm/io.h>
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#include <asm/sizes.h>
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#include <asm/mach/flash.h>
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#if 0
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/*
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* This is here for documentation purposes only - until these people
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* submit their machine types. It will be gone January 2005.
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*/
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static struct mtd_partition consus_partitions[] = {
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{
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.name = "Consus boot firmware",
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.offset = 0,
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.size = 0x00040000,
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.mask_flags = MTD_WRITABLE, /* force read-only */
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}, {
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.name = "Consus kernel",
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.offset = 0x00040000,
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.size = 0x00100000,
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.mask_flags = 0,
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}, {
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.name = "Consus disk",
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.offset = 0x00140000,
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/* The rest (up to 16M) for jffs. We could put 0 and
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make it find the size automatically, but right now
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i have 32 megs. jffs will use all 32 megs if given
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the chance, and this leads to horrible problems
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when you try to re-flash the image because blob
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won't erase the whole partition. */
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.size = 0x01000000 - 0x00140000,
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.mask_flags = 0,
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}, {
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/* this disk is a secondary disk, which can be used as
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needed, for simplicity, make it the size of the other
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consus partition, although realistically it could be
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the remainder of the disk (depending on the file
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system used) */
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.name = "Consus disk2",
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.offset = 0x01000000,
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.size = 0x01000000 - 0x00140000,
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.mask_flags = 0,
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}
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};
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/* Frodo has 2 x 16M 28F128J3A flash chips in bank 0: */
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static struct mtd_partition frodo_partitions[] =
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{
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{
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.name = "bootloader",
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.size = 0x00040000,
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.offset = 0x00000000,
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.mask_flags = MTD_WRITEABLE
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}, {
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.name = "bootloader params",
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.size = 0x00040000,
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.offset = MTDPART_OFS_APPEND,
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.mask_flags = MTD_WRITEABLE
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}, {
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.name = "kernel",
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.size = 0x00100000,
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.offset = MTDPART_OFS_APPEND,
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.mask_flags = MTD_WRITEABLE
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}, {
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.name = "ramdisk",
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.size = 0x00400000,
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.offset = MTDPART_OFS_APPEND,
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.mask_flags = MTD_WRITEABLE
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}, {
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.name = "file system",
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.size = MTDPART_SIZ_FULL,
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.offset = MTDPART_OFS_APPEND
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}
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};
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static struct mtd_partition jornada56x_partitions[] = {
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{
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.name = "bootldr",
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.size = 0x00040000,
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.offset = 0,
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.mask_flags = MTD_WRITEABLE,
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}, {
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.name = "rootfs",
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.size = MTDPART_SIZ_FULL,
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.offset = MTDPART_OFS_APPEND,
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}
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};
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static void jornada56x_set_vpp(int vpp)
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{
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if (vpp)
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GPSR = GPIO_GPIO26;
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else
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GPCR = GPIO_GPIO26;
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GPDR |= GPIO_GPIO26;
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}
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/*
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* Machine Phys Size set_vpp
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* Consus : SA1100_CS0_PHYS SZ_32M
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* Frodo : SA1100_CS0_PHYS SZ_32M
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* Jornada56x: SA1100_CS0_PHYS SZ_32M jornada56x_set_vpp
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*/
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#endif
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struct sa_subdev_info {
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char name[16];
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struct map_info map;
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struct mtd_info *mtd;
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2005-10-29 10:51:14 -04:00
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struct flash_platform_data *plat;
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2005-04-16 18:20:36 -04:00
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};
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struct sa_info {
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struct mtd_partition *parts;
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struct mtd_info *mtd;
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int num_subdev;
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2005-10-29 11:03:24 -04:00
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unsigned int nr_parts;
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2005-04-16 18:20:36 -04:00
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struct sa_subdev_info subdev[0];
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};
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static void sa1100_set_vpp(struct map_info *map, int on)
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{
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struct sa_subdev_info *subdev = container_of(map, struct sa_subdev_info, map);
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2005-10-29 10:51:14 -04:00
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subdev->plat->set_vpp(on);
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2005-04-16 18:20:36 -04:00
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}
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static void sa1100_destroy_subdev(struct sa_subdev_info *subdev)
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{
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if (subdev->mtd)
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map_destroy(subdev->mtd);
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if (subdev->map.virt)
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iounmap(subdev->map.virt);
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release_mem_region(subdev->map.phys, subdev->map.size);
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}
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static int sa1100_probe_subdev(struct sa_subdev_info *subdev, struct resource *res)
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{
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unsigned long phys;
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unsigned int size;
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int ret;
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phys = res->start;
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size = res->end - phys + 1;
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/*
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* Retrieve the bankwidth from the MSC registers.
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* We currently only implement CS0 and CS1 here.
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*/
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switch (phys) {
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default:
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printk(KERN_WARNING "SA1100 flash: unknown base address "
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"0x%08lx, assuming CS0\n", phys);
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case SA1100_CS0_PHYS:
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subdev->map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;
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break;
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case SA1100_CS1_PHYS:
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subdev->map.bankwidth = ((MSC0 >> 16) & MSC_RBW) ? 2 : 4;
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break;
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}
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if (!request_mem_region(phys, size, subdev->name)) {
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ret = -EBUSY;
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goto out;
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}
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2005-10-29 10:51:14 -04:00
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if (subdev->plat->set_vpp)
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2005-04-16 18:20:36 -04:00
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subdev->map.set_vpp = sa1100_set_vpp;
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subdev->map.phys = phys;
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subdev->map.size = size;
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subdev->map.virt = ioremap(phys, size);
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if (!subdev->map.virt) {
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ret = -ENOMEM;
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goto err;
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}
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simple_map_init(&subdev->map);
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/*
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* Now let's probe for the actual flash. Do it here since
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* specific machine settings might have been set above.
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*/
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2005-10-29 10:51:14 -04:00
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subdev->mtd = do_map_probe(subdev->plat->map_name, &subdev->map);
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2005-04-16 18:20:36 -04:00
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if (subdev->mtd == NULL) {
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ret = -ENXIO;
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goto err;
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}
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subdev->mtd->owner = THIS_MODULE;
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printk(KERN_INFO "SA1100 flash: CFI device at 0x%08lx, %dMiB, "
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"%d-bit\n", phys, subdev->mtd->size >> 20,
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subdev->map.bankwidth * 8);
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return 0;
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err:
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sa1100_destroy_subdev(subdev);
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out:
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return ret;
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}
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2005-10-29 10:57:20 -04:00
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static void sa1100_destroy(struct sa_info *info, struct flash_platform_data *plat)
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2005-04-16 18:20:36 -04:00
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{
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int i;
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if (info->mtd) {
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2005-10-29 11:03:24 -04:00
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if (info->nr_parts == 0)
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del_mtd_device(info->mtd);
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#ifdef CONFIG_MTD_PARTITIONS
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else
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del_mtd_partitions(info->mtd);
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#endif
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2005-04-16 18:20:36 -04:00
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#ifdef CONFIG_MTD_CONCAT
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if (info->mtd != info->subdev[0].mtd)
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mtd_concat_destroy(info->mtd);
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#endif
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}
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2005-11-07 04:01:27 -05:00
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kfree(info->parts);
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2005-04-16 18:20:36 -04:00
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for (i = info->num_subdev - 1; i >= 0; i--)
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sa1100_destroy_subdev(&info->subdev[i]);
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kfree(info);
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2005-10-29 10:57:20 -04:00
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if (plat->exit)
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plat->exit();
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2005-04-16 18:20:36 -04:00
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}
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static struct sa_info *__init
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2005-10-29 10:51:14 -04:00
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sa1100_setup_mtd(struct platform_device *pdev, struct flash_platform_data *plat)
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2005-04-16 18:20:36 -04:00
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{
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struct sa_info *info;
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int nr, size, i, ret = 0;
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/*
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* Count number of devices.
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*/
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for (nr = 0; ; nr++)
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if (!platform_get_resource(pdev, IORESOURCE_MEM, nr))
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break;
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if (nr == 0) {
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ret = -ENODEV;
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goto out;
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}
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size = sizeof(struct sa_info) + sizeof(struct sa_subdev_info) * nr;
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/*
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* Allocate the map_info structs in one go.
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*/
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2006-11-15 14:10:29 -05:00
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info = kzalloc(size, GFP_KERNEL);
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2005-04-16 18:20:36 -04:00
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if (!info) {
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ret = -ENOMEM;
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goto out;
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}
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2005-10-29 10:57:20 -04:00
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if (plat->init) {
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ret = plat->init();
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if (ret)
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goto err;
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}
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2005-04-16 18:20:36 -04:00
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/*
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* Claim and then map the memory regions.
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*/
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for (i = 0; i < nr; i++) {
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struct sa_subdev_info *subdev = &info->subdev[i];
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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_MEM, i);
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if (!res)
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break;
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subdev->map.name = subdev->name;
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2005-10-29 11:08:31 -04:00
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sprintf(subdev->name, "%s-%d", plat->name, i);
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2005-10-29 10:51:14 -04:00
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subdev->plat = plat;
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2005-04-16 18:20:36 -04:00
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ret = sa1100_probe_subdev(subdev, res);
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if (ret)
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break;
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}
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info->num_subdev = i;
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/*
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* ENXIO is special. It means we didn't find a chip when we probed.
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*/
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if (ret != 0 && !(ret == -ENXIO && info->num_subdev > 0))
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goto err;
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/*
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* If we found one device, don't bother with concat support. If
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* we found multiple devices, use concat if we have it available,
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* otherwise fail. Either way, it'll be called "sa1100".
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*/
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if (info->num_subdev == 1) {
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2005-10-29 11:08:31 -04:00
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strcpy(info->subdev[0].name, plat->name);
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2005-04-16 18:20:36 -04:00
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info->mtd = info->subdev[0].mtd;
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ret = 0;
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} else if (info->num_subdev > 1) {
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#ifdef CONFIG_MTD_CONCAT
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struct mtd_info *cdev[nr];
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/*
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* We detected multiple devices. Concatenate them together.
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*/
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for (i = 0; i < info->num_subdev; i++)
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cdev[i] = info->subdev[i].mtd;
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info->mtd = mtd_concat_create(cdev, info->num_subdev,
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2005-10-29 11:08:31 -04:00
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plat->name);
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2005-04-16 18:20:36 -04:00
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if (info->mtd == NULL)
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ret = -ENXIO;
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#else
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printk(KERN_ERR "SA1100 flash: multiple devices "
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"found but MTD concat support disabled.\n");
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ret = -ENXIO;
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#endif
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}
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if (ret == 0)
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return info;
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err:
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2005-10-29 10:57:20 -04:00
|
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sa1100_destroy(info, plat);
|
2005-04-16 18:20:36 -04:00
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out:
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return ERR_PTR(ret);
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}
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|
static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
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|
2005-11-09 17:32:44 -05:00
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static int __init sa1100_mtd_probe(struct platform_device *pdev)
|
2005-04-16 18:20:36 -04:00
|
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{
|
2005-10-29 10:51:14 -04:00
|
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|
struct flash_platform_data *plat = pdev->dev.platform_data;
|
2005-04-16 18:20:36 -04:00
|
|
|
struct mtd_partition *parts;
|
|
|
|
const char *part_type = NULL;
|
|
|
|
struct sa_info *info;
|
|
|
|
int err, nr_parts = 0;
|
|
|
|
|
2005-10-29 10:51:14 -04:00
|
|
|
if (!plat)
|
2005-04-16 18:20:36 -04:00
|
|
|
return -ENODEV;
|
|
|
|
|
2005-10-29 10:51:14 -04:00
|
|
|
info = sa1100_setup_mtd(pdev, plat);
|
2005-04-16 18:20:36 -04:00
|
|
|
if (IS_ERR(info)) {
|
|
|
|
err = PTR_ERR(info);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Partition selection stuff.
|
|
|
|
*/
|
|
|
|
#ifdef CONFIG_MTD_PARTITIONS
|
|
|
|
nr_parts = parse_mtd_partitions(info->mtd, part_probes, &parts, 0);
|
|
|
|
if (nr_parts > 0) {
|
|
|
|
info->parts = parts;
|
|
|
|
part_type = "dynamic";
|
|
|
|
} else
|
|
|
|
#endif
|
|
|
|
{
|
2005-10-29 10:51:14 -04:00
|
|
|
parts = plat->parts;
|
|
|
|
nr_parts = plat->nr_parts;
|
2005-04-16 18:20:36 -04:00
|
|
|
part_type = "static";
|
|
|
|
}
|
|
|
|
|
|
|
|
if (nr_parts == 0) {
|
|
|
|
printk(KERN_NOTICE "SA1100 flash: no partition info "
|
|
|
|
"available, registering whole flash\n");
|
|
|
|
add_mtd_device(info->mtd);
|
|
|
|
} else {
|
|
|
|
printk(KERN_NOTICE "SA1100 flash: using %s partition "
|
|
|
|
"definition\n", part_type);
|
|
|
|
add_mtd_partitions(info->mtd, parts, nr_parts);
|
|
|
|
}
|
|
|
|
|
2005-10-29 11:03:24 -04:00
|
|
|
info->nr_parts = nr_parts;
|
|
|
|
|
2005-11-09 17:32:44 -05:00
|
|
|
platform_set_drvdata(pdev, info);
|
2005-04-16 18:20:36 -04:00
|
|
|
err = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2005-11-09 17:32:44 -05:00
|
|
|
static int __exit sa1100_mtd_remove(struct platform_device *pdev)
|
2005-04-16 18:20:36 -04:00
|
|
|
{
|
2005-11-09 17:32:44 -05:00
|
|
|
struct sa_info *info = platform_get_drvdata(pdev);
|
|
|
|
struct flash_platform_data *plat = pdev->dev.platform_data;
|
2005-10-29 10:57:20 -04:00
|
|
|
|
2005-11-09 17:32:44 -05:00
|
|
|
platform_set_drvdata(pdev, NULL);
|
2005-10-29 10:57:20 -04:00
|
|
|
sa1100_destroy(info, plat);
|
|
|
|
|
2005-04-16 18:20:36 -04:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM
|
2005-11-09 17:32:44 -05:00
|
|
|
static int sa1100_mtd_suspend(struct platform_device *dev, pm_message_t state)
|
2005-04-16 18:20:36 -04:00
|
|
|
{
|
2005-11-09 17:32:44 -05:00
|
|
|
struct sa_info *info = platform_get_drvdata(dev);
|
2005-04-16 18:20:36 -04:00
|
|
|
int ret = 0;
|
|
|
|
|
2005-10-28 12:52:56 -04:00
|
|
|
if (info)
|
2005-04-16 18:20:36 -04:00
|
|
|
ret = info->mtd->suspend(info->mtd);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2005-11-09 17:32:44 -05:00
|
|
|
static int sa1100_mtd_resume(struct platform_device *dev)
|
2005-04-16 18:20:36 -04:00
|
|
|
{
|
2005-11-09 17:32:44 -05:00
|
|
|
struct sa_info *info = platform_get_drvdata(dev);
|
2005-10-28 12:52:56 -04:00
|
|
|
if (info)
|
2005-04-16 18:20:36 -04:00
|
|
|
info->mtd->resume(info->mtd);
|
|
|
|
return 0;
|
|
|
|
}
|
2005-10-29 11:14:08 -04:00
|
|
|
|
2005-11-09 17:32:44 -05:00
|
|
|
static void sa1100_mtd_shutdown(struct platform_device *dev)
|
2005-10-29 11:14:08 -04:00
|
|
|
{
|
2005-11-09 17:32:44 -05:00
|
|
|
struct sa_info *info = platform_get_drvdata(dev);
|
2005-10-29 11:14:08 -04:00
|
|
|
if (info && info->mtd->suspend(info->mtd) == 0)
|
|
|
|
info->mtd->resume(info->mtd);
|
|
|
|
}
|
2005-04-16 18:20:36 -04:00
|
|
|
#else
|
|
|
|
#define sa1100_mtd_suspend NULL
|
|
|
|
#define sa1100_mtd_resume NULL
|
2005-10-29 11:14:08 -04:00
|
|
|
#define sa1100_mtd_shutdown NULL
|
2005-04-16 18:20:36 -04:00
|
|
|
#endif
|
|
|
|
|
2005-11-09 17:32:44 -05:00
|
|
|
static struct platform_driver sa1100_mtd_driver = {
|
2005-04-16 18:20:36 -04:00
|
|
|
.probe = sa1100_mtd_probe,
|
|
|
|
.remove = __exit_p(sa1100_mtd_remove),
|
|
|
|
.suspend = sa1100_mtd_suspend,
|
|
|
|
.resume = sa1100_mtd_resume,
|
2005-10-29 11:14:08 -04:00
|
|
|
.shutdown = sa1100_mtd_shutdown,
|
2005-11-09 17:32:44 -05:00
|
|
|
.driver = {
|
|
|
|
.name = "flash",
|
2008-04-18 16:44:26 -04:00
|
|
|
.owner = THIS_MODULE,
|
2005-11-09 17:32:44 -05:00
|
|
|
},
|
2005-04-16 18:20:36 -04:00
|
|
|
};
|
|
|
|
|
|
|
|
static int __init sa1100_mtd_init(void)
|
|
|
|
{
|
2005-11-09 17:32:44 -05:00
|
|
|
return platform_driver_register(&sa1100_mtd_driver);
|
2005-04-16 18:20:36 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit sa1100_mtd_exit(void)
|
|
|
|
{
|
2005-11-09 17:32:44 -05:00
|
|
|
platform_driver_unregister(&sa1100_mtd_driver);
|
2005-04-16 18:20:36 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
module_init(sa1100_mtd_init);
|
|
|
|
module_exit(sa1100_mtd_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Nicolas Pitre");
|
|
|
|
MODULE_DESCRIPTION("SA1100 CFI map driver");
|
|
|
|
MODULE_LICENSE("GPL");
|
2008-04-18 16:44:26 -04:00
|
|
|
MODULE_ALIAS("platform:flash");
|