mtd/drivers/mtd/maps sbc8240.c,NONE,1.1 Config.in,1.56,1.57
Makefile.common,1.3,1.4
Thayne Harbaugh
tharbaugh at lnxi.com
Tue Sep 30 12:15:07 EDT 2003
Update of /home/cvs/mtd/drivers/mtd/maps
In directory phoenix.infradead.org:/tmp/cvs-serv5777
Modified Files:
Config.in Makefile.common
Added Files:
sbc8240.c
Log Message:
sbc8240 map driver contributed by Carolyn J Smith
--- NEW FILE sbc8240.c ---
/*
* Handle mapping of the flash memory access routines on the SBC8240 board.
*
* Carolyn Smith, Tektronix, Inc.
*
* This code is GPLed
*
*/
/*
* The SBC8240 has 2 flash banks.
* Bank 0 is a 512 KB AMD AM29F040B; 8 x 64 KB sectors.
* It contains the U-Boot code (7 sectors) and the environment (1 sector).
* Bank 1 is 4 x 1 MB AMD AM29LV800BT; 15 x 64 KB sectors, 1 x 32 KB sector,
* 2 x 8 KB sectors, 1 x 16 KB sectors.
* Both parts are JEDEC compatible.
*/
#include <linux/config.h>
#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/cfi.h>
#ifdef CONFIG_MTD_PARTITIONS
#include <linux/mtd/partitions.h>
#endif
#define DEBUG
#ifdef DEBUG
# define debugk(fmt,args...) printk(fmt ,##args)
#else
# define debugk(fmt,args...)
#endif
#define WINDOW_ADDR0 0xFFF00000 /* 512 KB */
#define WINDOW_SIZE0 0x00080000
#define BUSWIDTH0 1
#define WINDOW_ADDR1 0xFF000000 /* 4 MB */
#define WINDOW_SIZE1 0x00400000
#define BUSWIDTH1 8
#define MSG_PREFIX "sbc8240:" /* prefix for our printk()'s */
#define MTDID "sbc8240-%d" /* for mtdparts= partitioning */
static __u8 sbc8240_read8 (struct map_info *map, unsigned long ofs)
{
return __raw_readb(map->map_priv_1 + ofs);
}
static __u16 sbc8240_read16 (struct map_info *map, unsigned long ofs)
{
return __raw_readw(map->map_priv_1 + ofs);
}
static __u32 sbc8240_read32 (struct map_info *map, unsigned long ofs)
{
return __raw_readl(map->map_priv_1 + ofs);
}
unsigned long long result64;
static __u64 sbc8240_read64 (struct map_info *map, unsigned long ofs)
{
unsigned long flags, msr, saved_msr;
volatile long saved_fr[2];
volatile unsigned long long result;
volatile unsigned long *p;
save_flags(flags);
cli();
/* turn off floating point unavailable exceptions */
__asm__ __volatile__ (
"mfmsr %0"
: "=r" (msr) :);
saved_msr = msr;
msr |= MSR_FP;
msr &= ~(MSR_FE0 | MSR_FE1);
__asm__ __volatile__ (
"mtmsr %0\n"
"isync\n"
: : "r" (msr));
/* read the data via a floating point register */
ofs = map->map_priv_1 + ofs;
p = (unsigned long *) &result64;
__asm__ __volatile__ (
"lfd 1,0(%1)\n"
"stfd 1,0(%0)\n"
: : "r" (p), "r" (ofs)
);
/* restore state */
__asm__ __volatile__ (
"mtmsr %0\n"
"isync\n"
: : "r" (saved_msr));
restore_flags(flags);
p = (unsigned long *) &result64;
debugk("sbc8240_read64 ofs 0x%x result 0x%08x%08x\n", ofs, *p, *(p+1));
return result64;
}
static void sbc8240_copy_from (struct map_info *map,
void *to, unsigned long from, ssize_t len)
{
memcpy_fromio (to, (void *) (map->map_priv_1 + from), len);
}
static void sbc8240_write8 (struct map_info *map, __u8 d, unsigned long adr)
{
__raw_writeb(d, map->map_priv_1 + adr);
mb();
}
static void sbc8240_write16 (struct map_info *map, __u16 d,
unsigned long adr)
{
__raw_writew(d, map->map_priv_1 + adr);
mb();
}
static void sbc8240_write32 (struct map_info *map, __u32 d,
unsigned long adr)
{
__raw_writel(d, map->map_priv_1 + adr);
mb();
}
static void sbc8240_write64 (struct map_info *map, __u64 data,
unsigned long adr)
{
unsigned long long tmp;
unsigned long flags, msr, saved_msr, *p;
volatile long saved_fr[2];
save_flags(flags);
cli();
/* turn off floating point unavailable exceptions */
__asm__ __volatile__ (
"mfmsr %0"
: "=r" (msr) :);
saved_msr = msr;
msr |= MSR_FP;
msr &= ~(MSR_FE0 | MSR_FE1);
__asm__ __volatile__ (
"mtmsr %0\n"
"isync\n"
: : "r" (msr));
/* write the data via a floating point register */
tmp = data;
p = (unsigned long *) &tmp;
adr = map->map_priv_1 + adr;
debugk("sbc8240_write64 adr 0x%x data 0x%08x%08x\n", adr, *p, *(p+1));
__asm__ __volatile__ (
"stfd 1,0(%2)\n"
"lfd 1,0(%0)\n"
"stfd 1,0(%1)\n"
"lfd 1,0(%2)\n"
: : "r" (p), "r" (adr), "b" (saved_fr)
);
/* restore state */
__asm__ __volatile__ (
"mtmsr %0\n"
"isync\n"
: : "r" (saved_msr));
restore_flags(flags);
}
static void sbc8240_copy_to (struct map_info *map,
unsigned long to, const void *from, ssize_t len)
{
memcpy_toio ((void *) (map->map_priv_1 + to), from, len);
}
static struct map_info sbc8240_map[2] = {
{
name: "sbc8240 Flash Bank #0",
size: WINDOW_SIZE0,
buswidth: BUSWIDTH0,
read8: sbc8240_read8,
read16: sbc8240_read16,
read32: sbc8240_read32,
read64: sbc8240_read64,
copy_from: sbc8240_copy_from,
write8: sbc8240_write8,
write16: sbc8240_write16,
write32: sbc8240_write32,
write64: sbc8240_write64,
copy_to: sbc8240_copy_to
},
{
name: "sbc8240 Flash Bank #1",
size: WINDOW_SIZE1,
buswidth: BUSWIDTH1,
read8: sbc8240_read8,
read16: sbc8240_read16,
read32: sbc8240_read32,
read64: sbc8240_read64,
copy_from: sbc8240_copy_from,
write8: sbc8240_write8,
write16: sbc8240_write16,
write32: sbc8240_write32,
write64: sbc8240_write64,
copy_to: sbc8240_copy_to
}
};
#define NUM_FLASH_BANKS (sizeof(sbc8240_map) / sizeof(struct map_info))
/*
* The following defines the partition layout of SBC8240 boards.
*
* 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_MTD_PARTITIONS
static struct mtd_partition sbc8240_uboot_partitions [] = {
/* Bank 0 */
{
name: "U-boot", /* U-Boot Firmware */
offset: 0,
size: 0x00070000, /* 7 x 64 KB sectors */
mask_flags: MTD_WRITEABLE, /* force read-only */
},
{
name: "environment", /* U-Boot environment */
offset: 0x00070000,
size: 0x00010000, /* 1 x 64 KB sector */
},
};
static struct mtd_partition sbc8240_fs_partitions [] = {
{
name: "jffs", /* JFFS filesystem */
offset: 0,
size: 0x003C0000, /* 4 * 15 * 64KB */
},
{
name: "tmp32",
offset: 0x003C0000,
size: 0x00020000, /* 4 * 32KB */
},
{
name: "tmp8a",
offset: 0x003E0000,
size: 0x00008000, /* 4 * 8KB */
},
{
name: "tmp8b",
offset: 0x003E8000,
size: 0x00008000, /* 4 * 8KB */
},
{
name: "tmp16",
offset: 0x003F0000,
size: 0x00010000, /* 4 * 16KB */
}
};
#define NB_OF(x) (sizeof (x) / sizeof (x[0]))
/* trivial struct to describe partition information */
struct mtd_part_def
{
int nums;
unsigned char *type;
struct mtd_partition* mtd_part;
};
static struct mtd_info *sbc8240_mtd[NUM_FLASH_BANKS];
static struct mtd_part_def sbc8240_part_banks[NUM_FLASH_BANKS];
#endif /* CONFIG_MTD_PARTITIONS */
int __init init_sbc8240_mtd (void)
{
static struct _cjs {
u_long addr;
u_long size;
} pt[NUM_FLASH_BANKS] = {
{ WINDOW_ADDR0, WINDOW_SIZE0 },
{ WINDOW_ADDR1, WINDOW_SIZE1 },
};
int devicesfound = 0;
int i;
for (i = 0; i < NUM_FLASH_BANKS; i++) {
printk (KERN_NOTICE MSG_PREFIX
"Probing 0x%08lx at 0x%08lx\n", pt[i].size, pt[i].addr);
sbc8240_map[i].map_priv_1 =
(unsigned long) ioremap (pt[i].addr, pt[i].size);
if (!sbc8240_map[i].map_priv_1) {
printk (MSG_PREFIX "failed to ioremap\n");
return -EIO;
}
sbc8240_mtd[i] = do_map_probe("jedec_probe", &sbc8240_map[i]);
if (sbc8240_mtd[i]) {
sbc8240_mtd[i]->module = THIS_MODULE;
devicesfound++;
}
}
if (!devicesfound) {
printk(KERN_NOTICE MSG_PREFIX
"No suppported flash chips found!\n");
return -ENXIO;
}
#ifdef CONFIG_MTD_PARTITIONS
sbc8240_part_banks[0].mtd_part = sbc8240_uboot_partitions;
sbc8240_part_banks[0].type = "static image";
sbc8240_part_banks[0].nums = NB_OF(sbc8240_uboot_partitions);
sbc8240_part_banks[1].mtd_part = sbc8240_fs_partitions;
sbc8240_part_banks[1].type = "static file system";
sbc8240_part_banks[1].nums = NB_OF(sbc8240_fs_partitions);
for (i = 0; i < NUM_FLASH_BANKS; i++) {
if (!sbc8240_mtd[i]) continue;
if (sbc8240_part_banks[i].nums == 0) {
printk (KERN_NOTICE MSG_PREFIX
"No partition info available, registering whole device\n");
add_mtd_device(sbc8240_mtd[i]);
} else {
printk (KERN_NOTICE MSG_PREFIX
"Using %s partition definition\n", sbc8240_part_banks[i].mtd_part->name);
add_mtd_partitions (sbc8240_mtd[i],
sbc8240_part_banks[i].mtd_part,
sbc8240_part_banks[i].nums);
}
}
#else
printk(KERN_NOTICE MSG_PREFIX
"Registering %d flash banks at once\n", devicesfound);
for (i = 0; i < devicesfound; i++) {
add_mtd_device(sbc8240_mtd[i]);
}
#endif /* CONFIG_MTD_PARTITIONS */
return devicesfound == 0 ? -ENXIO : 0;
}
static void __exit cleanup_sbc8240_mtd (void)
{
int i;
for (i = 0; i < NUM_FLASH_BANKS; i++) {
if (sbc8240_mtd[i]) {
del_mtd_device (sbc8240_mtd[i]);
map_destroy (sbc8240_mtd[i]);
}
if (sbc8240_map[i].map_priv_1) {
iounmap ((void *) sbc8240_map[i].map_priv_1);
sbc8240_map[i].map_priv_1 = 0;
}
}
}
module_init (init_sbc8240_mtd);
module_exit (cleanup_sbc8240_mtd);
MODULE_LICENSE ("GPL");
MODULE_AUTHOR ("Carolyn Smith <carolyn.smith at tektronix.com>");
MODULE_DESCRIPTION ("MTD map driver for SBC8240 boards");
Index: Config.in
===================================================================
RCS file: /home/cvs/mtd/drivers/mtd/maps/Config.in,v
retrieving revision 1.56
retrieving revision 1.57
diff -u -r1.56 -r1.57
--- Config.in 22 Sep 2003 16:56:33 -0000 1.56
+++ Config.in 30 Sep 2003 16:15:05 -0000 1.57
@@ -40,6 +40,9 @@
fi
if [ "$CONFIG_PPC32" = "y" ]; then
+ if [ "$CLASSIC_PPC" = "y" ]; then
+ dep_tristate ' CFI Flash device mapped on SBC8240' CONFIG_MTD_SBC8240 $CONFIG_MTD_JEDECPROBE
+ fi
if [ "$CONFIG_8xx" = "y" ]; then
if [ "$CONFIG_TQM8xxL" = "y" ]; then
dep_tristate ' CFI Flash device mapped on TQM8XXL' CONFIG_MTD_TQM8XXL $CONFIG_MTD_CFI
Index: Makefile.common
===================================================================
RCS file: /home/cvs/mtd/drivers/mtd/maps/Makefile.common,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -r1.3 -r1.4
--- Makefile.common 28 Aug 2003 06:50:24 -0000 1.3
+++ Makefile.common 30 Sep 2003 16:15:05 -0000 1.4
@@ -62,5 +62,6 @@
obj-$(CONFIG_MTD_BEECH) += beech-mtd.o
obj-$(CONFIG_MTD_ARCTIC) += arctic-mtd.o
obj-$(CONFIG_MTD_H720X) += h720x-flash.o
+obj-$(CONFIG_MTD_SBC8240) += sbc8240.o
-include $(TOPDIR)/Rules.make
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