sa1100-flash.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

/*
 * Flash memory access on SA11x0 based devices
 * 
 * (C) 2000 Nicolas Pitre <[e-mail]>
 * 
 * $Id: sa1100-flash.c,v 1.22 2001/10/02 10:04:52 rmk Exp $
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>

#include <asm/hardware.h>
#include <asm/io.h>


#ifndef CONFIG_ARCH_SA1100
#error This is for SA1100 architecture only
#endif


#define WINDOW_ADDR 0xe8000000

static __u8 sa1100_read8(struct map_info *map, unsigned long ofs)
{
	return readb(map->map_priv_1 + ofs);
}

static __u16 sa1100_read16(struct map_info *map, unsigned long ofs)
{
	return readw(map->map_priv_1 + ofs);
}

static __u32 sa1100_read32(struct map_info *map, unsigned long ofs)
{
	return readl(map->map_priv_1 + ofs);
}

static void sa1100_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
	memcpy(to, (void *)(map->map_priv_1 + from), len);
}

static void sa1100_write8(struct map_info *map, __u8 d, unsigned long adr)
{
	writeb(d, map->map_priv_1 + adr);
}

static void sa1100_write16(struct map_info *map, __u16 d, unsigned long adr)
{
	writew(d, map->map_priv_1 + adr);
}

static void sa1100_write32(struct map_info *map, __u32 d, unsigned long adr)
{
	writel(d, map->map_priv_1 + adr);
}

static void sa1100_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
{
	memcpy((void *)(map->map_priv_1 + to), from, len);
}


#ifdef CONFIG_SA1100_H3600

static void h3600_set_vpp(struct map_info *map, int vpp)
{
	if (vpp)
		set_h3600_egpio(EGPIO_H3600_VPP_ON);
	else
		clr_h3600_egpio(EGPIO_H3600_VPP_ON);
}

#endif

#ifdef CONFIG_SA1100_JORNADA720

static void jornada720_set_vpp(int vpp)
{
  if (vpp)
      PPSR |= 0x80;
  else
      PPSR &= ~0x80;
  PPDR |= 0x80;
}

#endif

static struct map_info sa1100_map = {
	name:		"SA1100 flash",
	read8:		sa1100_read8,
	read16:		sa1100_read16,
	read32:		sa1100_read32,
	copy_from:	sa1100_copy_from,
	write8:		sa1100_write8,
	write16:	sa1100_write16,
	write32:	sa1100_write32,
	copy_to:	sa1100_copy_to,

	map_priv_1:	WINDOW_ADDR,
};


/*
 * Here are partition information for all known SA1100-based devices.
 * See include/linux/mtd/partitions.h for definition of the mtd_partition
 * structure.
 * 
 * The *_max_flash_size is the maximum possible mapped flash size which
 * is not necessarily the actual flash size.  It must correspond to the 
 * value specified in the mapping definition defined by the
 * "struct map_desc *_io_desc" for the corresponding machine.
 */

#ifdef CONFIG_SA1100_ASSABET

/* Phase 4 Assabet has two 28F160B3 flash parts in bank 0: */
static unsigned long assabet4_max_flash_size = 0x00400000;
static struct mtd_partition assabet4_partitions[] = {
        {
                name: "bootloader",
                size: 0x00020000,
                offset: 0,
                mask_flags: MTD_WRITEABLE
        },{
                name: "bootloader params",
                size: 0x00020000,
                offset: MTDPART_OFS_APPEND,
                mask_flags: MTD_WRITEABLE
        },{
                name: "jffs",
                size: MTDPART_SIZ_FULL,
                offset: MTDPART_OFS_APPEND
        }
};

/* Phase 5 Assabet has two 28F128J3A flash parts in bank 0: */
static unsigned long assabet5_max_flash_size = 0x02000000;
static struct mtd_partition assabet5_partitions[] = {
        {
                name: "bootloader",
                size: 0x00040000,
                offset: 0,
                mask_flags: MTD_WRITEABLE
        },{
                name: "bootloader params",
                size: 0x00040000,
                offset: MTDPART_OFS_APPEND,
                mask_flags: MTD_WRITEABLE
        },{
                name: "jffs",
                size: MTDPART_SIZ_FULL,
                offset: MTDPART_OFS_APPEND
        }
};

#define assabet_max_flash_size assabet5_max_flash_size
#define assabet_partitions     assabet5_partitions

#endif

#ifdef CONFIG_SA1100_FLEXANET

/* Flexanet has two 28F128J3A flash parts in bank 0: */
static unsigned long flexanet_max_flash_size = 0x02000000;
static struct mtd_partition flexanet_partitions[] = {
        {
                name: "bootloader",
                size: 0x00040000,
                offset: 0,
                mask_flags: MTD_WRITEABLE
        },{
                name: "bootloader params",
                size: 0x00040000,
                offset: MTDPART_OFS_APPEND,
                mask_flags: MTD_WRITEABLE
        },{
                name: "kernel",
                size: 0x000C0000,
                offset: MTDPART_OFS_APPEND,
                mask_flags: MTD_WRITEABLE
        },{
                name: "altkernel",
                size: 0x000C0000,
                offset: MTDPART_OFS_APPEND,
                mask_flags: MTD_WRITEABLE
        },{
                name: "root",
                size: 0x00400000,
                offset: MTDPART_OFS_APPEND,
                mask_flags: MTD_WRITEABLE
        },{
                name: "free1",
                size: 0x00300000,
                offset: MTDPART_OFS_APPEND,
                mask_flags: MTD_WRITEABLE
        },{
                name: "free2",
                size: 0x00300000,
                offset: MTDPART_OFS_APPEND,
                mask_flags: MTD_WRITEABLE
        },{
                name: "free3",
                size: MTDPART_SIZ_FULL,
                offset: MTDPART_OFS_APPEND,
                mask_flags: MTD_WRITEABLE
        }
};

#endif

#ifdef CONFIG_SA1100_HUW_WEBPANEL
static unsigned long huw_webpanel_max_flash_size = 0x01000000;
static struct mtd_partition huw_webpanel_partitions[] = {
	{ 
	  name: "Loader",
	  size: 0x00040000,
	  offset: 0,
	},{
	  name: "Sector 1",
	  size: 0x00040000,
	  offset: MTDPART_OFS_APPEND,
	},{
	  size: MTDPART_SIZ_FULL,
	  offset: MTDPART_OFS_APPEND,
	}
};
#endif /* CONFIG_SA1100_HUW_WEBPANEL */


#ifdef CONFIG_SA1100_H3600

static unsigned long h3600_max_flash_size = 0x02000000;
static struct mtd_partition h3600_partitions[] = {
	{
		name: "H3600 boot firmware",
		size: 0x00040000,
		offset: 0,
		mask_flags: MTD_WRITEABLE  /* force read-only */
	},{
		name: "H3600 kernel",
		size: 0x00080000,
		offset: 0x40000
	},{
		name: "H3600 params",
		size: 0x00040000,
		offset: 0xC0000
	},{
#ifdef CONFIG_JFFS2_FS
		name: "H3600 root jffs2",
		offset: 0x00100000,
		size: MTDPART_SIZ_FULL
#else
		name: "H3600 initrd",
		size: 0x00100000,
		offset: 0x00100000
	},{
		name: "H3600 root cramfs",
		size: 0x00300000,
		offset: 0x00200000
	},{
		name: "H3600 usr cramfs",
		size: 0x00800000,
		offset: 0x00500000
	},{
		name: "H3600 usr local",
		offset: 0x00d00000,
		size: MTDPART_SIZ_FULL
#endif
	}
};

#endif
#ifdef CONFIG_SA1100_FREEBIRD
static unsigned long freebird_max_flash_size = 0x02000000;
static struct mtd_partition freebird_partitions[] = {
#if CONFIG_SA1100_FREEBIRD_NEW
    {
     name: "firmware",
     size: 0x00040000,
     offset: 0,
     mask_flags: MTD_WRITEABLE  /* force read-only */
    },{
     name: "kernel",
     size: 0x00080000,
     offset: 0x40000
    },{
     name: "params",
     size: 0x00040000,
     offset: 0xC0000
    },{
     name: "initrd",
     size: 0x00100000,
     offset: 0x00100000
    },{
     name: "root cramfs",
     size: 0x00300000,
     offset: 0x00200000
    },{
     name: "usr cramfs",
     size: 0x00C00000,
     offset: 0x00500000
    },{
	 name: "local",
	 offset: 0x01100000,
	 size: MTDPART_SIZ_FULL 
	}
#else
	{ offset: 0,            		size: 0x00040000,   },
	{ offset: MTDPART_OFS_APPEND,   size: 0x000c0000,   },
	{ offset: MTDPART_OFS_APPEND,	size: 0x00400000,	},
	{ offset: MTDPART_OFS_APPEND,   size: MTDPART_SIZ_FULL  }
#endif
	};
#endif
																									

#ifdef CONFIG_SA1100_CERF

static unsigned long cerf_max_flash_size = 0x01000000;
static struct mtd_partition cerf_partitions[] = {
	{ offset: 0,			size: 0x00800000 	},
	{ offset: MTDPART_OFS_APPEND,	size: 0x00800000 	}
};

#endif

#ifdef CONFIG_SA1100_GRAPHICSCLIENT

static unsigned long graphicsclient_max_flash_size = 0x01000000;
static struct mtd_partition graphicsclient_partitions[] = {
	{ 
	 name: "zImage",
	 offset: 0,
	 size: 0x100000
	},
	{ 
         name: "ramdisk.gz",
         offset: MTDPART_OFS_APPEND,
         size: 0x300000 		
	},
	{ 
	  name: "User FS",
          offset: MTDPART_OFS_APPEND,	
          size: MTDPART_SIZ_FULL
	}
};

#endif

#ifdef CONFIG_SA1100_GRAPHICSMASTER