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/*
* Flash mapping for BCM947XX boards
*
* Copyright 2004, Broadcom Corporation
* All Rights Reserved.
*
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
*
* $Id$
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/config.h>
#include <typedefs.h>
#include <bcmnvram.h>
#include <bcmutils.h>
#include <sbconfig.h>
#include <sbchipc.h>
#include <sbutils.h>
#include <trxhdr.h>
/* Global SB handle */
extern void *bcm947xx_sbh;
extern spinlock_t bcm947xx_sbh_lock;
/* Convenience */
#define sbh bcm947xx_sbh
#define sbh_lock bcm947xx_sbh_lock
#ifdef CONFIG_MTD_PARTITIONS
extern struct mtd_partition * init_mtd_partitions(struct mtd_info *mtd, size_t size);
#endif
#define WINDOW_ADDR 0x1fc00000
#define WINDOW_SIZE 0x400000
#define BUSWIDTH 2
/* e.g., flash=2M or flash=4M */
static int flash = 0;
MODULE_PARM(flash, "i");
static int __init
bcm947xx_setup(char *str)
{
flash = memparse(str, &str);
return 1;
}
__setup("flash=", bcm947xx_setup);
static struct mtd_info *bcm947xx_mtd;
__u8 bcm947xx_map_read8(struct map_info *map, unsigned long ofs)
{
if (map->map_priv_2 == 1)
return __raw_readb(map->map_priv_1 + ofs);
u16 val = __raw_readw(map->map_priv_1 + (ofs & ~1));
if (ofs & 1)
return ((val >> 8) & 0xff);
else
return (val & 0xff);
}
__u16 bcm947xx_map_read16(struct map_info *map, unsigned long ofs)
{
return __raw_readw(map->map_priv_1 + ofs);
}
__u32 bcm947xx_map_read32(struct map_info *map, unsigned long ofs)
{
return __raw_readl(map->map_priv_1 + ofs);
}
void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
if (len==1) {
memcpy_fromio(to, map->map_priv_1 + from, len);
} else {
int i;
u16 *dest = (u16 *) to;
u16 *src = (u16 *) (map->map_priv_1 + from);
for (i = 0; i < (len / 2); i++) {
dest[i] = src[i];
}
if (len & 1)
*((u8 *)dest+len-1) = src[i] & 0xff;
}
}
void bcm947xx_map_write8(struct map_info *map, __u8 d, unsigned long adr)
{
__raw_writeb(d, map->map_priv_1 + adr);
mb();
}
void bcm947xx_map_write16(struct map_info *map, __u16 d, unsigned long adr)
{
__raw_writew(d, map->map_priv_1 + adr);
mb();
}
void bcm947xx_map_write32(struct map_info *map, __u32 d, unsigned long adr)
{
__raw_writel(d, map->map_priv_1 + adr);
mb();
}
void bcm947xx_map_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
{
memcpy_toio(map->map_priv_1 + to, from, len);
}
struct map_info bcm947xx_map = {
name: "Physically mapped flash",
size: WINDOW_SIZE,
buswidth: BUSWIDTH,
read8: bcm947xx_map_read8,
read16: bcm947xx_map_read16,
read32: bcm947xx_map_read32,
copy_from: bcm947xx_map_copy_from,
write8: bcm947xx_map_write8,
write16: bcm947xx_map_write16,
write32: bcm947xx_map_write32,
copy_to: bcm947xx_map_copy_to
};
#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
#define init_bcm947xx_map init_module
#define cleanup_bcm947xx_map cleanup_module
#endif
mod_init_t init_bcm947xx_map(void)
{
ulong flags;
uint coreidx;
chipcregs_t *cc;
uint32 fltype;
uint window_addr = 0, window_size = 0;
size_t size;
int ret = 0;
#ifdef CONFIG_MTD_PARTITIONS
struct mtd_partition *parts;
int i;
#endif
spin_lock_irqsave(&sbh_lock, flags);
coreidx = sb_coreidx(sbh);
/* Check strapping option if chipcommon exists */
if ((cc = sb_setcore(sbh, SB_CC, 0))) {
fltype = readl(&cc->capabilities) & CAP_FLASH_MASK;
if (fltype == PFLASH) {
bcm947xx_map.map_priv_2 = 1;
window_addr = 0x1c000000;
bcm947xx_map.size = window_size = 32 * 1024 * 1024;
if ((readl(&cc->flash_config) & CC_CFG_DS) == 0)
bcm947xx_map.buswidth = 1;
}
} else {
fltype = PFLASH;
bcm947xx_map.map_priv_2 = 0;
window_addr = WINDOW_ADDR;
window_size = WINDOW_SIZE;
}
sb_setcoreidx(sbh, coreidx);
spin_unlock_irqrestore(&sbh_lock, flags);
if (fltype != PFLASH) {
printk(KERN_ERR "pflash: found no supported devices\n");
ret = -ENODEV;
goto fail;
}
bcm947xx_map.map_priv_1 = (unsigned long) ioremap(window_addr, window_size);
if (!bcm947xx_map.map_priv_1) {
printk(KERN_ERR "pflash: ioremap failed\n");
ret = -EIO;
goto fail;
}
if (!(bcm947xx_mtd = do_map_probe("cfi_probe", &bcm947xx_map))) {
printk(KERN_ERR "pflash: cfi_probe failed\n");
ret = -ENXIO;
goto fail;
}
bcm947xx_mtd->module = THIS_MODULE;
/* Allow size override for testing */
size = flash ? : bcm947xx_mtd->size;
printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, window_addr);
#ifdef CONFIG_MTD_PARTITIONS
parts = init_mtd_partitions(bcm947xx_mtd, size);
for (i = 0; parts[i].name; i++);
ret = add_mtd_partitions(bcm947xx_mtd, parts, i);
if (ret) {
printk(KERN_ERR "pflash: add_mtd_partitions failed\n");
goto fail;
}
#endif
return 0;
fail:
if (bcm947xx_mtd)
map_destroy(bcm947xx_mtd);
if (bcm947xx_map.map_priv_1)
iounmap((void *) bcm947xx_map.map_priv_1);
bcm947xx_map.map_priv_1 = 0;
return ret;
}
mod_exit_t cleanup_bcm947xx_map(void)
{
#ifdef CONFIG_MTD_PARTITIONS
del_mtd_partitions(bcm947xx_mtd);
#endif
map_destroy(bcm947xx_mtd);
iounmap((void *) bcm947xx_map.map_priv_1);
bcm947xx_map.map_priv_1 = 0;
}
module_init(init_bcm947xx_map);
module_exit(cleanup_bcm947xx_map);
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