[MTD] maps: Add support for the "TQM834x" Boards

The following patch adds support for the TQ Systems  TQM834x  Boards.
Verified on TQM8349L.

This is a resubmit after integrating the suggested changes.

Signed-off-by: Marian Balakowicz <m8@semihalf.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Marian Balakowicz 2005-11-07 08:33:38 +00:00 committed by Thomas Gleixner
parent ea17629f3e
commit be30c10fd8
3 changed files with 302 additions and 2 deletions

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@ -1,5 +1,5 @@
# drivers/mtd/maps/Kconfig
# $Id: Kconfig,v 1.59 2005/09/18 10:46:41 joern Exp $
# $Id: Kconfig,v 1.60 2005/11/07 08:33:35 gleixner Exp $
menu "Mapping drivers for chip access"
depends on MTD!=n
@ -347,6 +347,14 @@ config MTD_REDWOOD
Redwood board. If you have one of these boards and would like to
use the flash chips on it, say 'Y'.
config MTD_TQM834x
tristate "Flash device mapped on TQ Components TQM834x Boards"
depends on MTD_CFI && TQM834x
help
This enables access routines for the flash chips on the
TQ Components TQM834x boards. If you have one of these boards
and would like to use the flash chips on it, say 'Y'.
config MTD_CSTM_MIPS_IXX
tristate "Flash chip mapping on ITE QED-4N-S01B, Globespan IVR or custom board"
depends on MIPS && MTD_CFI && MTD_JEDECPROBE && MTD_PARTITIONS

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@ -1,7 +1,7 @@
#
# linux/drivers/maps/Makefile
#
# $Id: Makefile.common,v 1.32 2005/09/18 10:46:41 joern Exp $
# $Id: Makefile.common,v 1.33 2005/11/07 08:33:35 gleixner Exp $
ifeq ($(CONFIG_MTD_COMPLEX_MAPPINGS),y)
obj-$(CONFIG_MTD) += map_funcs.o
@ -72,3 +72,4 @@ obj-$(CONFIG_MTD_PLATRAM) += plat-ram.o
obj-$(CONFIG_MTD_OMAP_NOR) += omap_nor.o
obj-$(CONFIG_MTD_PQ2FADS) += pq2fads.o
obj-$(CONFIG_MTD_MTX1) += mtx-1_flash.o
obj-$(CONFIG_MTD_TQM834x) += tqm834x.o

291
drivers/mtd/maps/tqm834x.c Normal file
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@ -0,0 +1,291 @@
/*
* drivers/mtd/maps/tqm834x.c
*
* MTD mapping driver for TQM834x boards
*
* Copyright 2005 Wolfgang Denk, DENX Software Engineering, <wd@denx.de>.
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <asm/ppcboot.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#define FLASH_BANK_MAX 2
extern unsigned char __res[];
/* trivial struct to describe partition information */
struct mtd_part_def
{
int nums;
unsigned char *type;
struct mtd_partition* mtd_part;
};
static struct mtd_info* mtd_banks[FLASH_BANK_MAX];
static struct map_info* map_banks[FLASH_BANK_MAX];
static struct mtd_part_def part_banks[FLASH_BANK_MAX];
static unsigned long num_banks;
static unsigned long start_scan_addr;
#ifdef CONFIG_MTD_PARTITIONS
/*
* The following defines the partition layout of TQM834x boards.
*
* See include/linux/mtd/partitions.h for definition of the
* mtd_partition structure.
*
* Assume minimal initial size of 4 MiB per bank, will be updated
* later in init_tqm834x_mtd() routine.
*/
/* Partition definition for the first flash bank which is always present. */
static struct mtd_partition tqm834x_partitions_bank1[] = {
{
.name = "u-boot", /* u-boot firmware */
.offset = 0x00000000,
.size = 0x00040000, /* 256 KiB */
/*mask_flags: MTD_WRITEABLE, * force read-only */
},
{
.name = "env", /* u-boot environment */
.offset = 0x00040000,
.size = 0x00020000, /* 128 KiB */
/*mask_flags: MTD_WRITEABLE, * force read-only */
},
{
.name = "kernel", /* linux kernel image */
.offset = 0x00060000,
.size = 0x00100000, /* 1 MiB */
/*mask_flags: MTD_WRITEABLE, * force read-only */
},
{
.name = "initrd", /* ramdisk image */
.offset = 0x00160000,
.size = 0x00200000, /* 2 MiB */
},
{
.name = "user", /* user data */
.offset = 0x00360000,
.size = 0x000a0000, /* remaining space */
/* NOTE: this parttion size is re-calcated in */
/* init_tqm834x_mtd() to cover actual remaining space. */
},
};
/* Partition definition for the second flash bank which may be present on some
* TQM834x boards.
*/
static struct mtd_partition tqm834x_partitions_bank2[] = {
{
.name = "jffs2", /* jffs2 filesystem */
.offset = 0x00000000,
.size = 0x00400000, /* whole device */
/* NOTE: this parttion size is re-calcated in */
/* init_tqm834x_mtd() to cover actual device size. */
},
};
#endif /* CONFIG_MTD_PARTITIONS */
static int __init init_tqm834x_mtd(void)
{
int idx = 0, ret = 0;
unsigned long flash_addr, flash_size, mtd_size = 0;
/* pointer to TQM834x board info data */
bd_t *bd = (bd_t *)__res;
#ifdef CONFIG_MTD_CMDLINE_PARTS
int n;
char mtdid[4];
const char *part_probes[] = { "cmdlinepart", NULL };
#endif
flash_addr = bd->bi_flashstart;
flash_size = bd->bi_flashsize;
/* request maximum flash size address space */
start_scan_addr = (unsigned long)ioremap(flash_addr, flash_size);
if (!start_scan_addr) {
printk("%s: Failed to ioremap address: 0x%lx\n",
__FUNCTION__, flash_addr);
return -EIO;
}
for(idx = 0 ; idx < FLASH_BANK_MAX ; idx++) {
if (mtd_size >= flash_size)
break;
pr_debug("%s: chip probing count %d\n", __FUNCTION__, idx);
map_banks[idx] =
(struct map_info *)kmalloc(sizeof(struct map_info),
GFP_KERNEL);
if (map_banks[idx] == NULL) {
ret = -ENOMEM;
goto error_mem;
}
memset((void *)map_banks[idx], 0, sizeof(struct map_info));
map_banks[idx]->name = (char *)kmalloc(16, GFP_KERNEL);
if (map_banks[idx]->name == NULL) {
ret = -ENOMEM;
goto error_mem;
}
memset((void *)map_banks[idx]->name, 0, 16);
sprintf(map_banks[idx]->name, "TQM834x-%d", idx);
map_banks[idx]->size = flash_size;
map_banks[idx]->bankwidth = 4;
simple_map_init(map_banks[idx]);
map_banks[idx]->virt = (void __iomem *)
(start_scan_addr + ((idx > 0) ?
(mtd_banks[idx-1] ? mtd_banks[idx-1]->size : 0) : 0));
map_banks[idx]->phys =
flash_addr + ((idx > 0) ?
(mtd_banks[idx-1] ? mtd_banks[idx-1]->size : 0) : 0);
/* start to probe flash chips */
mtd_banks[idx] = do_map_probe("cfi_probe", map_banks[idx]);
if (mtd_banks[idx]) {
mtd_banks[idx]->owner = THIS_MODULE;
mtd_size += mtd_banks[idx]->size;
num_banks++;
pr_debug("%s: bank %ld, name: %s, size: %d bytes \n",
__FUNCTION__, num_banks,
mtd_banks[idx]->name, mtd_banks[idx]->size);
}
}
/* no supported flash chips found */
if (!num_banks) {
printk("TQM834x: No supported flash chips found!\n");
ret = -ENXIO;
goto error_mem;
}
#ifdef CONFIG_MTD_PARTITIONS
/*
* Select static partition definitions
*/
n = ARRAY_SIZE(tqm834x_partitions_bank1);
part_banks[0].mtd_part = tqm834x_partitions_bank1;
part_banks[0].type = "static image bank1";
part_banks[0].nums = n;
/* update last partition size to cover actual remaining space */
tqm834x_partitions_bank1[n - 1].size =
mtd_banks[0]->size -
tqm834x_partitions_bank1[n - 1].offset;
/* check if we have second bank? */
if (num_banks == 2) {
n = ARRAY_SIZE(tqm834x_partitions_bank2);
part_banks[1].mtd_part = tqm834x_partitions_bank2;
part_banks[1].type = "static image bank2";
part_banks[1].nums = n;
/* update last partition size to cover actual remaining space */
tqm834x_partitions_bank2[n - 1].size =
mtd_banks[1]->size -
tqm834x_partitions_bank2[n - 1].offset;
}
for(idx = 0; idx < num_banks ; idx++) {
#ifdef CONFIG_MTD_CMDLINE_PARTS
sprintf(mtdid, "%d", idx);
n = parse_mtd_partitions(mtd_banks[idx],
part_probes,
&part_banks[idx].mtd_part,
0);
pr_debug("%s: %d command line partitions on bank %s\n",
__FUNCTION__, n, mtdid);
if (n > 0) {
part_banks[idx].type = "command line";
part_banks[idx].nums = n;
}
#endif /* CONFIG_MTD_CMDLINE_PARTS */
if (part_banks[idx].nums == 0) {
printk(KERN_NOTICE
"TQM834x flash bank %d: no partition info "
"available, registering whole device\n", idx);
add_mtd_device(mtd_banks[idx]);
} else {
printk(KERN_NOTICE
"TQM834x flash bank %d: Using %s partition "
"definition\n", idx, part_banks[idx].type);
add_mtd_partitions(mtd_banks[idx],
part_banks[idx].mtd_part,
part_banks[idx].nums);
}
}
#else /* ! CONFIG_MTD_PARTITIONS */
printk(KERN_NOTICE "TQM834x flash: registering %d flash banks "
"at once\n", num_banks);
for(idx = 0 ; idx < num_banks ; idx++)
add_mtd_device(mtd_banks[idx]);
#endif /* CONFIG_MTD_PARTITIONS */
return 0;
error_mem:
for (idx = 0 ; idx < FLASH_BANK_MAX ; idx++) {
if (map_banks[idx] != NULL) {
if (map_banks[idx]->name != NULL) {
kfree(map_banks[idx]->name);
map_banks[idx]->name = NULL;
}
kfree(map_banks[idx]);
map_banks[idx] = NULL;
}
}
iounmap((void *)start_scan_addr);
return ret;
}
static void __exit cleanup_tqm834x_mtd(void)
{
unsigned int idx = 0;
for(idx = 0 ; idx < num_banks ; idx++) {
/* destroy mtd_info previously allocated */
if (mtd_banks[idx]) {
del_mtd_partitions(mtd_banks[idx]);
map_destroy(mtd_banks[idx]);
}
/* release map_info not used anymore */
kfree(map_banks[idx]->name);
kfree(map_banks[idx]);
}
if (start_scan_addr) {
iounmap((void *)start_scan_addr);
start_scan_addr = 0;
}
}
module_init(init_tqm834x_mtd);
module_exit(cleanup_tqm834x_mtd);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Wolfgang Denk <wd@denx.de>");
MODULE_DESCRIPTION("MTD map driver for TQM834x boards");