/*
* Flash memory access on iPAQ Handhelds (either SA1100 or PXA250 based)
*
* (C) 2000 Nicolas Pitre <nico@cam.org>
* (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
*
* $Id: ipaq-flash.c,v 1.5 2005/11/07 11:14:27 gleixner Exp $
*/
#include <linux/config.h>
#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 <asm/hardware.h>
#include <asm/arch-sa1100/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);
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, 0, 1);
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, 0, 1);
}
#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, 0, 1);
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");
