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/**
* SPI Flash probe code.
* (C) 2006 Atmark Techno, Inc.
*/
#include <linux/init.h>
#include <linux/kernel.h>
//#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/mtd/map.h>
#include <linux/mtd/gen_probe.h>
#include "spi_flash.h"
#include <linux/autoconf.h>
//#include "spi_common.h"
#include <linux/mtd/mtd.h>
//#define MTD_SPI_DEBUG
#define REG32(reg) (*(volatile unsigned int *)((unsigned int)reg))
#if defined(MTD_SPI_DEBUG)
#define KDEBUG(args...) printk(args)
#else
#define KDEBUG(args...)
#endif
typedef struct spi_chip_info *(spi_probe_func)(struct map_info *, struct chip_probe *);
//extern spi_probe_func spi_probe_suzaku;
struct spi_chip_info *spi_probe_flash_chip(struct map_info *map, struct chip_probe *cp);
static spi_probe_func *probe_func[] = {
//#if defined(CONFIG_MTD_SPI_SUZAKU) || defined(CONFIG_MTD_SPI_SUZAKU_MODULE)
spi_probe_flash_chip,
//#endif
NULL
};
extern int mtd_spi_erase(struct mtd_info *mtd, struct erase_info *instr);
extern int mtd_spi_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
extern int mtd_spi_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
extern void mtd_spi_sync(struct mtd_info *mtd);
extern int mtd_spi_lock(struct mtd_info *mtd, loff_t ofs, size_t len);
extern int mtd_spi_unlock(struct mtd_info *mtd, loff_t ofs, size_t len);
extern int mtd_spi_suspend(struct mtd_info *mtd);
extern void mtd_spi_resume(struct mtd_info *mtd);
static struct mtd_info *spi_chip_setup(struct map_info *map, struct spi_chip_info *chip_info);
static struct mtd_info *spi_probe_chip(struct map_info *map, struct chip_probe *cp);
struct mtd_info *spi_probe1(struct map_info *map);
static void spi_destroy1(struct mtd_info *mtd);
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
struct mtd_info *spi_probe2(struct map_info *map);
static void spi_destroy2(struct mtd_info *mtd);
#endif
static struct mtd_chip_driver spi_chipdrv1 = {
probe: spi_probe1,
destroy: spi_destroy1,
name: "flash_bank_1",
module: THIS_MODULE,
};
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
static struct mtd_chip_driver spi_chipdrv2 = {
probe: spi_probe2,
destroy: spi_destroy2,
name: "flash_bank_2",
module: THIS_MODULE,
};
#endif
static struct mtd_info *spi_chip_setup(struct map_info *map, struct spi_chip_info *chip_info)
{
struct mtd_info *mtd;
mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
if (!mtd) {
printk(KERN_WARNING "Failed to allocate memory for MTD device\n");
return NULL;
}
memset(mtd, 0, sizeof(struct mtd_info));
mtd->type = MTD_NORFLASH;//MTD_OTHER;
mtd->flags = MTD_CAP_NORFLASH;
mtd->name = map->name;
mtd->size = chip_info->flash->deviceSize;
mtd->erasesize = chip_info->flash->sectorSize;
mtd->erase = mtd_spi_erase;
mtd->read = mtd_spi_read;
mtd->write = mtd_spi_write;
mtd->sync = mtd_spi_sync;
mtd->lock = mtd_spi_lock;
mtd->unlock = mtd_spi_unlock;
mtd->suspend = mtd_spi_suspend;
mtd->resume = mtd_spi_resume;
mtd->priv = (void *)map;
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
if (0 == chip_info->chip_select) map->fldrv = &spi_chipdrv1;
else map->fldrv = &spi_chipdrv2;
#else
map->fldrv = &spi_chipdrv1;
#endif
map->fldrv_priv = chip_info;
mtd->writesize = 1;
printk(KERN_INFO "SPI flash(%s) was found at CS%d, size 0x%x\n",
chip_info->flash->name, chip_info->chip_select, chip_info->flash->deviceSize );
return mtd;
}
static struct mtd_info *spi_probe_chip(struct map_info *map, struct chip_probe *cp)
{
struct mtd_info *mtd = NULL;
struct spi_chip_info *chip_info = NULL;
int i;
for (i = 0; probe_func[i]; i++) {
chip_info = probe_func[i](map, cp);
if (!chip_info) continue;
mtd = spi_chip_setup(map, chip_info);
if (!mtd) {
kfree(chip_info);
continue;
}
return mtd;
}
return NULL;
}
static struct chip_probe spi_chip_probe1 = {
name: "SPI1",
};
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
static struct chip_probe spi_chip_probe2 = {
name: "SPI2",
};
#endif
struct mtd_info *spi_probe1(struct map_info *map)
{
KDEBUG("SPI flash 1\n");
return spi_probe_chip(map, &spi_chip_probe1);
}
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
struct mtd_info *spi_probe2(struct map_info *map)
{
KDEBUG("SPI flash 2\n");
return spi_probe_chip(map, &spi_chip_probe2);
}
#endif
static void spi_destroy1(struct mtd_info *mtd)
{
KDEBUG("SPI flash 1\n");
struct map_info *map = (struct map_info *)mtd->priv;
struct spi_chip_info *chip_info = (struct spi_chip_info *)map->fldrv_priv;
if (chip_info->destroy) {
chip_info->destroy(chip_info);
}
}
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
static void spi_destroy2(struct mtd_info *mtd)
{
KDEBUG("SPI flash 2\n");
struct map_info *map = (struct map_info *)mtd->priv;
struct spi_chip_info *chip_info = (struct spi_chip_info *)map->fldrv_priv;
if (chip_info->destroy) {
chip_info->destroy(chip_info);
}
}
#endif
int __init spi_probe_init(void)
{
printk("SPI INIT\n");
register_mtd_chip_driver(&spi_chipdrv1);
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
register_mtd_chip_driver(&spi_chipdrv2);
#endif
return 0;
}
void __exit spi_probe_exit(void)
{
unregister_mtd_chip_driver(&spi_chipdrv1);
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
unregister_mtd_chip_driver(&spi_chipdrv2);
#endif
}
module_init(spi_probe_init);
module_exit(spi_probe_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Masahiro Nakai <nakai@atmark-techno.com> et al.");
MODULE_DESCRIPTION("Probe code for SPI flash chips");
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