mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 09:36:25 +00:00
2f82af08fc
Due to problems at cam.org, my nico@cam.org email address is no longer valid. FRom now on, nico@fluxnic.net should be used instead. Signed-off-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
461 lines
11 KiB
C
461 lines
11 KiB
C
/*
|
|
* Flash memory access on iPAQ Handhelds (either SA1100 or PXA250 based)
|
|
*
|
|
* (C) 2000 Nicolas Pitre <nico@fluxnic.net>
|
|
* (C) 2002 Hewlett-Packard Company <jamey.hicks@hp.com>
|
|
* (C) 2003 Christian Pellegrin <chri@ascensit.com>, <chri@infis.univ.ts.it>: concatenation of multiple flashes
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/page.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/system.h>
|
|
#include <asm/errno.h>
|
|
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
#include <linux/mtd/partitions.h>
|
|
#ifdef CONFIG_MTD_CONCAT
|
|
#include <linux/mtd/concat.h>
|
|
#endif
|
|
|
|
#include <mach/hardware.h>
|
|
#include <mach/h3600.h>
|
|
#include <asm/io.h>
|
|
|
|
|
|
#ifndef CONFIG_IPAQ_HANDHELD
|
|
#error This is for iPAQ Handhelds only
|
|
#endif
|
|
#ifdef CONFIG_SA1100_JORNADA56X
|
|
|
|
static void jornada56x_set_vpp(struct map_info *map, int vpp)
|
|
{
|
|
if (vpp)
|
|
GPSR = GPIO_GPIO26;
|
|
else
|
|
GPCR = GPIO_GPIO26;
|
|
GPDR |= GPIO_GPIO26;
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SA1100_JORNADA720
|
|
|
|
static void jornada720_set_vpp(struct map_info *map, int vpp)
|
|
{
|
|
if (vpp)
|
|
PPSR |= 0x80;
|
|
else
|
|
PPSR &= ~0x80;
|
|
PPDR |= 0x80;
|
|
}
|
|
|
|
#endif
|
|
|
|
#define MAX_IPAQ_CS 2 /* Number of CS we are going to test */
|
|
|
|
#define IPAQ_MAP_INIT(X) \
|
|
{ \
|
|
name: "IPAQ flash " X, \
|
|
}
|
|
|
|
|
|
static struct map_info ipaq_map[MAX_IPAQ_CS] = {
|
|
IPAQ_MAP_INIT("bank 1"),
|
|
IPAQ_MAP_INIT("bank 2")
|
|
};
|
|
|
|
static struct mtd_info *my_sub_mtd[MAX_IPAQ_CS] = {
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
/*
|
|
* Here are partition information for all known IPAQ-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 be no more than
|
|
* the value specified in the "struct map_desc *_io_desc" mapping
|
|
* definition for the corresponding machine.
|
|
*
|
|
* Please keep these in alphabetical order, and formatted as per existing
|
|
* entries. Thanks.
|
|
*/
|
|
|
|
#ifdef CONFIG_IPAQ_HANDHELD
|
|
static unsigned long h3xxx_max_flash_size = 0x04000000;
|
|
static struct mtd_partition h3xxx_partitions[] = {
|
|
{
|
|
name: "H3XXX boot firmware",
|
|
#ifndef CONFIG_LAB
|
|
size: 0x00040000,
|
|
#else
|
|
size: 0x00080000,
|
|
#endif
|
|
offset: 0,
|
|
#ifndef CONFIG_LAB
|
|
mask_flags: MTD_WRITEABLE, /* force read-only */
|
|
#endif
|
|
},
|
|
{
|
|
name: "H3XXX root jffs2",
|
|
#ifndef CONFIG_LAB
|
|
size: 0x2000000 - 2*0x40000, /* Warning, this is fixed later */
|
|
offset: 0x00040000,
|
|
#else
|
|
size: 0x2000000 - 0x40000 - 0x80000, /* Warning, this is fixed later */
|
|
offset: 0x00080000,
|
|
#endif
|
|
},
|
|
{
|
|
name: "asset",
|
|
size: 0x40000,
|
|
offset: 0x2000000 - 0x40000, /* Warning, this is fixed later */
|
|
mask_flags: MTD_WRITEABLE, /* force read-only */
|
|
}
|
|
};
|
|
|
|
#ifndef CONFIG_MTD_CONCAT
|
|
static struct mtd_partition h3xxx_partitions_bank2[] = {
|
|
/* this is used only on 2 CS machines when concat is not present */
|
|
{
|
|
name: "second H3XXX root jffs2",
|
|
size: 0x1000000 - 0x40000, /* Warning, this is fixed later */
|
|
offset: 0x00000000,
|
|
},
|
|
{
|
|
name: "second asset",
|
|
size: 0x40000,
|
|
offset: 0x1000000 - 0x40000, /* Warning, this is fixed later */
|
|
mask_flags: MTD_WRITEABLE, /* force read-only */
|
|
}
|
|
};
|
|
#endif
|
|
|
|
static DEFINE_SPINLOCK(ipaq_vpp_lock);
|
|
|
|
static void h3xxx_set_vpp(struct map_info *map, int vpp)
|
|
{
|
|
static int nest = 0;
|
|
|
|
spin_lock(&ipaq_vpp_lock);
|
|
if (vpp)
|
|
nest++;
|
|
else
|
|
nest--;
|
|
if (nest)
|
|
assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 1);
|
|
else
|
|
assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 0);
|
|
spin_unlock(&ipaq_vpp_lock);
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(CONFIG_SA1100_JORNADA56X) || defined(CONFIG_SA1100_JORNADA720)
|
|
static unsigned long jornada_max_flash_size = 0x02000000;
|
|
static struct mtd_partition jornada_partitions[] = {
|
|
{
|
|
name: "Jornada boot firmware",
|
|
size: 0x00040000,
|
|
offset: 0,
|
|
mask_flags: MTD_WRITEABLE, /* force read-only */
|
|
}, {
|
|
name: "Jornada root jffs2",
|
|
size: MTDPART_SIZ_FULL,
|
|
offset: 0x00040000,
|
|
}
|
|
};
|
|
#endif
|
|
|
|
|
|
static struct mtd_partition *parsed_parts;
|
|
static struct mtd_info *mymtd;
|
|
|
|
static unsigned long cs_phys[] = {
|
|
#ifdef CONFIG_ARCH_SA1100
|
|
SA1100_CS0_PHYS,
|
|
SA1100_CS1_PHYS,
|
|
SA1100_CS2_PHYS,
|
|
SA1100_CS3_PHYS,
|
|
SA1100_CS4_PHYS,
|
|
SA1100_CS5_PHYS,
|
|
#else
|
|
PXA_CS0_PHYS,
|
|
PXA_CS1_PHYS,
|
|
PXA_CS2_PHYS,
|
|
PXA_CS3_PHYS,
|
|
PXA_CS4_PHYS,
|
|
PXA_CS5_PHYS,
|
|
#endif
|
|
};
|
|
|
|
static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
|
|
|
|
static int __init h1900_special_case(void);
|
|
|
|
static int __init ipaq_mtd_init(void)
|
|
{
|
|
struct mtd_partition *parts = NULL;
|
|
int nb_parts = 0;
|
|
int parsed_nr_parts = 0;
|
|
const char *part_type;
|
|
int i; /* used when we have >1 flash chips */
|
|
unsigned long tot_flashsize = 0; /* used when we have >1 flash chips */
|
|
|
|
/* Default flash bankwidth */
|
|
// ipaq_map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;
|
|
|
|
if (machine_is_h1900())
|
|
{
|
|
/* For our intents, the h1900 is not a real iPAQ, so we special-case it. */
|
|
return h1900_special_case();
|
|
}
|
|
|
|
if (machine_is_h3100() || machine_is_h1900())
|
|
for(i=0; i<MAX_IPAQ_CS; i++)
|
|
ipaq_map[i].bankwidth = 2;
|
|
else
|
|
for(i=0; i<MAX_IPAQ_CS; i++)
|
|
ipaq_map[i].bankwidth = 4;
|
|
|
|
/*
|
|
* Static partition definition selection
|
|
*/
|
|
part_type = "static";
|
|
|
|
simple_map_init(&ipaq_map[0]);
|
|
simple_map_init(&ipaq_map[1]);
|
|
|
|
#ifdef CONFIG_IPAQ_HANDHELD
|
|
if (machine_is_ipaq()) {
|
|
parts = h3xxx_partitions;
|
|
nb_parts = ARRAY_SIZE(h3xxx_partitions);
|
|
for(i=0; i<MAX_IPAQ_CS; i++) {
|
|
ipaq_map[i].size = h3xxx_max_flash_size;
|
|
ipaq_map[i].set_vpp = h3xxx_set_vpp;
|
|
ipaq_map[i].phys = cs_phys[i];
|
|
ipaq_map[i].virt = ioremap(cs_phys[i], 0x04000000);
|
|
if (machine_is_h3100 () || machine_is_h1900())
|
|
ipaq_map[i].bankwidth = 2;
|
|
}
|
|
if (machine_is_h3600()) {
|
|
/* No asset partition here */
|
|
h3xxx_partitions[1].size += 0x40000;
|
|
nb_parts--;
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_ARCH_H5400
|
|
if (machine_is_h5400()) {
|
|
ipaq_map[0].size = 0x02000000;
|
|
ipaq_map[1].size = 0x02000000;
|
|
ipaq_map[1].phys = 0x02000000;
|
|
ipaq_map[1].virt = ipaq_map[0].virt + 0x02000000;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_ARCH_H1900
|
|
if (machine_is_h1900()) {
|
|
ipaq_map[0].size = 0x00400000;
|
|
ipaq_map[1].size = 0x02000000;
|
|
ipaq_map[1].phys = 0x00080000;
|
|
ipaq_map[1].virt = ipaq_map[0].virt + 0x00080000;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_SA1100_JORNADA56X
|
|
if (machine_is_jornada56x()) {
|
|
parts = jornada_partitions;
|
|
nb_parts = ARRAY_SIZE(jornada_partitions);
|
|
ipaq_map[0].size = jornada_max_flash_size;
|
|
ipaq_map[0].set_vpp = jornada56x_set_vpp;
|
|
ipaq_map[0].virt = (__u32)ioremap(0x0, 0x04000000);
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_SA1100_JORNADA720
|
|
if (machine_is_jornada720()) {
|
|
parts = jornada_partitions;
|
|
nb_parts = ARRAY_SIZE(jornada_partitions);
|
|
ipaq_map[0].size = jornada_max_flash_size;
|
|
ipaq_map[0].set_vpp = jornada720_set_vpp;
|
|
}
|
|
#endif
|
|
|
|
|
|
if (machine_is_ipaq()) { /* for iPAQs only */
|
|
for(i=0; i<MAX_IPAQ_CS; i++) {
|
|
printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with CFI.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
|
|
my_sub_mtd[i] = do_map_probe("cfi_probe", &ipaq_map[i]);
|
|
if (!my_sub_mtd[i]) {
|
|
printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
|
|
my_sub_mtd[i] = do_map_probe("jedec_probe", &ipaq_map[i]);
|
|
}
|
|
if (!my_sub_mtd[i]) {
|
|
printk(KERN_NOTICE "iPAQ flash: failed to find flash.\n");
|
|
if (i)
|
|
break;
|
|
else
|
|
return -ENXIO;
|
|
} else
|
|
printk(KERN_NOTICE "iPAQ flash: found %d bytes\n", my_sub_mtd[i]->size);
|
|
|
|
/* do we really need this debugging? --joshua 20030703 */
|
|
// printk("my_sub_mtd[%d]=%p\n", i, my_sub_mtd[i]);
|
|
my_sub_mtd[i]->owner = THIS_MODULE;
|
|
tot_flashsize += my_sub_mtd[i]->size;
|
|
}
|
|
#ifdef CONFIG_MTD_CONCAT
|
|
/* fix the asset location */
|
|
# ifdef CONFIG_LAB
|
|
h3xxx_partitions[1].size = tot_flashsize - 0x40000 - 0x80000 /* extra big boot block */;
|
|
# else
|
|
h3xxx_partitions[1].size = tot_flashsize - 2 * 0x40000;
|
|
# endif
|
|
h3xxx_partitions[2].offset = tot_flashsize - 0x40000;
|
|
/* and concat the devices */
|
|
mymtd = mtd_concat_create(&my_sub_mtd[0], i,
|
|
"ipaq");
|
|
if (!mymtd) {
|
|
printk("Cannot create iPAQ concat device\n");
|
|
return -ENXIO;
|
|
}
|
|
#else
|
|
mymtd = my_sub_mtd[0];
|
|
|
|
/*
|
|
*In the very near future, command line partition parsing
|
|
* will use the device name as 'mtd-id' instead of a value
|
|
* passed to the parse_cmdline_partitions() routine. Since
|
|
* the bootldr says 'ipaq', make sure it continues to work.
|
|
*/
|
|
mymtd->name = "ipaq";
|
|
|
|
if ((machine_is_h3600())) {
|
|
# ifdef CONFIG_LAB
|
|
h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x80000;
|
|
# else
|
|
h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000;
|
|
# endif
|
|
nb_parts = 2;
|
|
} else {
|
|
# ifdef CONFIG_LAB
|
|
h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000 - 0x80000; /* extra big boot block */
|
|
# else
|
|
h3xxx_partitions[1].size = my_sub_mtd[0]->size - 2*0x40000;
|
|
# endif
|
|
h3xxx_partitions[2].offset = my_sub_mtd[0]->size - 0x40000;
|
|
}
|
|
|
|
if (my_sub_mtd[1]) {
|
|
# ifdef CONFIG_LAB
|
|
h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x80000;
|
|
# else
|
|
h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x40000;
|
|
# endif
|
|
h3xxx_partitions_bank2[1].offset = my_sub_mtd[1]->size - 0x40000;
|
|
}
|
|
#endif
|
|
}
|
|
else {
|
|
/*
|
|
* Now let's probe for the actual flash. Do it here since
|
|
* specific machine settings might have been set above.
|
|
*/
|
|
printk(KERN_NOTICE "IPAQ flash: probing %d-bit flash bus, window=%lx\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
|
|
mymtd = do_map_probe("cfi_probe", &ipaq_map[0]);
|
|
if (!mymtd)
|
|
return -ENXIO;
|
|
mymtd->owner = THIS_MODULE;
|
|
}
|
|
|
|
|
|
/*
|
|
* Dynamic partition selection stuff (might override the static ones)
|
|
*/
|
|
|
|
i = parse_mtd_partitions(mymtd, part_probes, &parsed_parts, 0);
|
|
|
|
if (i > 0) {
|
|
nb_parts = parsed_nr_parts = i;
|
|
parts = parsed_parts;
|
|
part_type = "dynamic";
|
|
}
|
|
|
|
if (!parts) {
|
|
printk(KERN_NOTICE "IPAQ flash: no partition info available, registering whole flash at once\n");
|
|
add_mtd_device(mymtd);
|
|
#ifndef CONFIG_MTD_CONCAT
|
|
if (my_sub_mtd[1])
|
|
add_mtd_device(my_sub_mtd[1]);
|
|
#endif
|
|
} else {
|
|
printk(KERN_NOTICE "Using %s partition definition\n", part_type);
|
|
add_mtd_partitions(mymtd, parts, nb_parts);
|
|
#ifndef CONFIG_MTD_CONCAT
|
|
if (my_sub_mtd[1])
|
|
add_mtd_partitions(my_sub_mtd[1], h3xxx_partitions_bank2, ARRAY_SIZE(h3xxx_partitions_bank2));
|
|
#endif
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit ipaq_mtd_cleanup(void)
|
|
{
|
|
int i;
|
|
|
|
if (mymtd) {
|
|
del_mtd_partitions(mymtd);
|
|
#ifndef CONFIG_MTD_CONCAT
|
|
if (my_sub_mtd[1])
|
|
del_mtd_partitions(my_sub_mtd[1]);
|
|
#endif
|
|
map_destroy(mymtd);
|
|
#ifdef CONFIG_MTD_CONCAT
|
|
for(i=0; i<MAX_IPAQ_CS; i++)
|
|
#else
|
|
for(i=1; i<MAX_IPAQ_CS; i++)
|
|
#endif
|
|
{
|
|
if (my_sub_mtd[i])
|
|
map_destroy(my_sub_mtd[i]);
|
|
}
|
|
kfree(parsed_parts);
|
|
}
|
|
}
|
|
|
|
static int __init h1900_special_case(void)
|
|
{
|
|
/* The iPAQ h1900 is a special case - it has weird ROM. */
|
|
simple_map_init(&ipaq_map[0]);
|
|
ipaq_map[0].size = 0x80000;
|
|
ipaq_map[0].set_vpp = h3xxx_set_vpp;
|
|
ipaq_map[0].phys = 0x0;
|
|
ipaq_map[0].virt = ioremap(0x0, 0x04000000);
|
|
ipaq_map[0].bankwidth = 2;
|
|
|
|
printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
|
|
mymtd = do_map_probe("jedec_probe", &ipaq_map[0]);
|
|
if (!mymtd)
|
|
return -ENODEV;
|
|
add_mtd_device(mymtd);
|
|
printk(KERN_NOTICE "iPAQ flash: registered h1910 flash\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_init(ipaq_mtd_init);
|
|
module_exit(ipaq_mtd_cleanup);
|
|
|
|
MODULE_AUTHOR("Jamey Hicks");
|
|
MODULE_DESCRIPTION("IPAQ CFI map driver");
|
|
MODULE_LICENSE("MIT");
|