+++ /dev/null
-/*
- * $Id: ocelot.c,v 1.17 2005/11/07 11:14:27 gleixner Exp $
- *
- * Flash on Momenco Ocelot
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <asm/io.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-
-#define OCELOT_PLD 0x2c000000
-#define FLASH_WINDOW_ADDR 0x2fc00000
-#define FLASH_WINDOW_SIZE 0x00080000
-#define FLASH_BUSWIDTH 1
-#define NVRAM_WINDOW_ADDR 0x2c800000
-#define NVRAM_WINDOW_SIZE 0x00007FF0
-#define NVRAM_BUSWIDTH 1
-
-static unsigned int cacheflush = 0;
-
-static struct mtd_info *flash_mtd;
-static struct mtd_info *nvram_mtd;
-
-static void ocelot_ram_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
-{
- struct map_info *map = mtd->priv;
- size_t done = 0;
-
- /* If we use memcpy, it does word-wide writes. Even though we told the
- GT64120A that it's an 8-bit wide region, word-wide writes don't work.
- We end up just writing the first byte of the four to all four bytes.
- So we have this loop instead */
- *retlen = len;
- while(len) {
- __raw_writeb(*(unsigned char *) from, map->virt + to);
- from++;
- to++;
- len--;
- }
-}
-
-static struct mtd_partition *parsed_parts;
-
-struct map_info ocelot_flash_map = {
- .name = "Ocelot boot flash",
- .size = FLASH_WINDOW_SIZE,
- .bankwidth = FLASH_BUSWIDTH,
- .phys = FLASH_WINDOW_ADDR,
-};
-
-struct map_info ocelot_nvram_map = {
- .name = "Ocelot NVRAM",
- .size = NVRAM_WINDOW_SIZE,
- .bankwidth = NVRAM_BUSWIDTH,
- .phys = NVRAM_WINDOW_ADDR,
-};
-
-static const char *probes[] = { "RedBoot", NULL };
-
-static int __init init_ocelot_maps(void)
-{
- void *pld;
- int nr_parts;
- unsigned char brd_status;
-
- printk(KERN_INFO "Momenco Ocelot MTD mappings: Flash 0x%x at 0x%x, NVRAM 0x%x at 0x%x\n",
- FLASH_WINDOW_SIZE, FLASH_WINDOW_ADDR, NVRAM_WINDOW_SIZE, NVRAM_WINDOW_ADDR);
-
- /* First check whether the flash jumper is present */
- pld = ioremap(OCELOT_PLD, 0x10);
- if (!pld) {
- printk(KERN_NOTICE "Failed to ioremap Ocelot PLD\n");
- return -EIO;
- }
- brd_status = readb(pld+4);
- iounmap(pld);
-
- /* Now ioremap the NVRAM space */
- ocelot_nvram_map.virt = ioremap_nocache(NVRAM_WINDOW_ADDR, NVRAM_WINDOW_SIZE);
- if (!ocelot_nvram_map.virt) {
- printk(KERN_NOTICE "Failed to ioremap Ocelot NVRAM space\n");
- return -EIO;
- }
-
- simple_map_init(&ocelot_nvram_map);
-
- /* And do the RAM probe on it to get an MTD device */
- nvram_mtd = do_map_probe("map_ram", &ocelot_nvram_map);
- if (!nvram_mtd) {
- printk("NVRAM probe failed\n");
- goto fail_1;
- }
- nvram_mtd->owner = THIS_MODULE;
- nvram_mtd->erasesize = 16;
- /* Override the write() method */
- nvram_mtd->write = ocelot_ram_write;
-
- /* Now map the flash space */
- ocelot_flash_map.virt = ioremap_nocache(FLASH_WINDOW_ADDR, FLASH_WINDOW_SIZE);
- if (!ocelot_flash_map.virt) {
- printk(KERN_NOTICE "Failed to ioremap Ocelot flash space\n");
- goto fail_2;
- }
- /* Now the cached version */
- ocelot_flash_map.cached = (unsigned long)__ioremap(FLASH_WINDOW_ADDR, FLASH_WINDOW_SIZE, 0);
-
- simple_map_init(&ocelot_flash_map);
-
- /* Only probe for flash if the write jumper is present */
- if (brd_status & 0x40) {
- flash_mtd = do_map_probe("jedec", &ocelot_flash_map);
- } else {
- printk(KERN_NOTICE "Ocelot flash write jumper not present. Treating as ROM\n");
- }
- /* If that failed or the jumper's absent, pretend it's ROM */
- if (!flash_mtd) {
- flash_mtd = do_map_probe("map_rom", &ocelot_flash_map);
- /* If we're treating it as ROM, set the erase size */
- if (flash_mtd)
- flash_mtd->erasesize = 0x10000;
- }
- if (!flash_mtd)
- goto fail3;
-
- add_mtd_device(nvram_mtd);
-
- flash_mtd->owner = THIS_MODULE;
- nr_parts = parse_mtd_partitions(flash_mtd, probes, &parsed_parts, 0);
-
- if (nr_parts > 0)
- add_mtd_partitions(flash_mtd, parsed_parts, nr_parts);
- else
- add_mtd_device(flash_mtd);
-
- return 0;
-
- fail3:
- iounmap((void *)ocelot_flash_map.virt);
- if (ocelot_flash_map.cached)
- iounmap((void *)ocelot_flash_map.cached);
- fail_2:
- map_destroy(nvram_mtd);
- fail_1:
- iounmap((void *)ocelot_nvram_map.virt);
-
- return -ENXIO;
-}
-
-static void __exit cleanup_ocelot_maps(void)
-{
- del_mtd_device(nvram_mtd);
- map_destroy(nvram_mtd);
- iounmap((void *)ocelot_nvram_map.virt);
-
- if (parsed_parts)
- del_mtd_partitions(flash_mtd);
- else
- del_mtd_device(flash_mtd);
- map_destroy(flash_mtd);
- iounmap((void *)ocelot_flash_map.virt);
- if (ocelot_flash_map.cached)
- iounmap((void *)ocelot_flash_map.cached);
-}
-
-module_init(init_ocelot_maps);
-module_exit(cleanup_ocelot_maps);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Red Hat, Inc. - David Woodhouse <dwmw2@cambridge.redhat.com>");
-MODULE_DESCRIPTION("MTD map driver for Momenco Ocelot board");
projects / linux-2.6-omap-h63xx.git / commitdiff