mtd/drivers/mtd/maps pb1550-flash.c,NONE,1.1 Config.in,1.63,1.64
Makefile.common,1.8,1.9
ppopov at infradead.org
ppopov at infradead.org
Fri Feb 27 12:42:08 EST 2004
Update of /home/cvs/mtd/drivers/mtd/maps
In directory phoenix.infradead.org:/tmp/cvs-serv2725/drivers/mtd/maps
Modified Files:
Config.in Makefile.common
Added Files:
pb1550-flash.c
Log Message:
Pb1550 NOR flash mapping driver.
--- NEW FILE pb1550-flash.c ---
/*
* Flash memory access on Alchemy Pb1550 board
*
* (C) 2004 Embedded Edge, LLC, based on pb1550-flash.c:
* (C) 2003 Pete Popov <ppopov at pacbell.net>
*
*/
#include <linux/config.h>
#include <linux/init.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/io.h>
#include <asm/au1000.h>
#include <asm/pb1550.h>
#ifdef DEBUG_RW
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif
static unsigned long window_addr;
static unsigned long window_size;
static struct map_info pb1550_map = {
.name = "Pb1550 flash",
};
static unsigned char flash_buswidth = 4;
/*
* Support only 64MB NOR Flash parts
*/
#ifdef PB1550_BOTH_BANKS
/* both banks will be used. Combine the first bank and the first
* part of the second bank together into a single jffs/jffs2
* partition.
*/
static struct mtd_partition pb1550_partitions[] = {
/* assume boot[2:0]:swap is '0000' or '1000', which translates to:
* 1C00 0000 1FFF FFFF CE0 64MB Boot NOR Flash
* 1800 0000 1BFF FFFF CE0 64MB Param NOR Flash
*/
{
.name = "User FS",
.size = (0x1FC00000 - 0x18000000),
.offset = 0x0000000
},{
.name = "yamon",
.size = 0x0100000,
.offset = MTDPART_OFS_APPEND,
.mask_flags = MTD_WRITEABLE
},{
.name = "raw kernel",
.size = (0x300000 - 0x40000), /* last 256KB is yamon env */
.offset = MTDPART_OFS_APPEND,
}
};
#elif defined(PB1550_BOOT_ONLY)
static struct mtd_partition pb1550_partitions[] = {
/* assume boot[2:0]:swap is '0000' or '1000', which translates to:
* 1C00 0000 1FFF FFFF CE0 64MB Boot NOR Flash
*/
{
.name = "User FS",
.size = 0x03c00000,
.offset = 0x0000000
},{
.name = "yamon",
.size = 0x0100000,
.offset = MTDPART_OFS_APPEND,
.mask_flags = MTD_WRITEABLE
},{
.name = "raw kernel",
.size = (0x300000-0x40000), /* last 256KB is yamon env */
.offset = MTDPART_OFS_APPEND,
}
};
#elif defined(PB1550_USER_ONLY)
static struct mtd_partition pb1550_partitions[] = {
/* assume boot[2:0]:swap is '0000' or '1000', which translates to:
* 1800 0000 1BFF FFFF CE0 64MB Param NOR Flash
*/
{
.name = "User FS",
.size = (0x4000000 - 0x200000), /* reserve 2MB for raw kernel */
.offset = 0x0000000
},{
.name = "raw kernel",
.size = MTDPART_SIZ_FULL,
.offset = MTDPART_OFS_APPEND,
}
};
#else
#error MTD_PB1550 define combo error /* should never happen */
#endif
#define NB_OF(x) (sizeof(x)/sizeof(x[0]))
static struct mtd_info *mymtd;
/*
* Probe the flash density and setup window address and size
* based on user CONFIG options. There are times when we don't
* want the MTD driver to be probing the boot or user flash,
* so having the option to enable only one bank is important.
*/
int setup_flash_params(void)
{
u16 boot_swapboot;
boot_swapboot = (au_readl(MEM_STSTAT) & (0x7<<1)) |
((bcsr->status >> 6) & 0x1);
printk("Pb1550 MTD: boot:swap %d\n", boot_swapboot);
switch (boot_swapboot) {
case 0: /* 512Mbit devices, both enabled */
case 1:
case 8:
case 9:
#if defined(PB1550_BOTH_BANKS)
window_addr = 0x18000000;
window_size = 0x8000000;
#elif defined(PB1550_BOOT_ONLY)
window_addr = 0x1C000000;
window_size = 0x4000000;
#else /* USER ONLY */
window_addr = 0x1E000000;
window_size = 0x1000000;
#endif
break;
case 0xC:
case 0xD:
case 0xE:
case 0xF:
/* 64 MB Boot NOR Flash is disabled */
/* and the start address is moved to 0x0C00000 */
window_addr = 0x0C000000;
window_size = 0x4000000;
default:
printk("Pb1550 MTD: unsupported boot:swap setting\n");
return 1;
}
return 0;
}
int __init pb1550_mtd_init(void)
{
struct mtd_partition *parts;
int nb_parts = 0;
/* Default flash buswidth */
pb1550_map.buswidth = flash_buswidth;
if (setup_flash_params())
return -ENXIO;
/*
* Static partition definition selection
*/
parts = pb1550_partitions;
nb_parts = NB_OF(pb1550_partitions);
pb1550_map.size = window_size;
/*
* Now let's probe for the actual flash. Do it here since
* specific machine settings might have been set above.
*/
printk(KERN_NOTICE "Pb1550 flash: probing %d-bit flash bus\n",
pb1550_map.buswidth*8);
pb1550_map.virt =
(unsigned long)ioremap(window_addr, window_size);
mymtd = do_map_probe("cfi_probe", &pb1550_map);
if (!mymtd) return -ENXIO;
mymtd->owner = THIS_MODULE;
add_mtd_partitions(mymtd, parts, nb_parts);
return 0;
}
static void __exit pb1550_mtd_cleanup(void)
{
if (mymtd) {
del_mtd_partitions(mymtd);
map_destroy(mymtd);
}
}
module_init(pb1550_mtd_init);
module_exit(pb1550_mtd_cleanup);
MODULE_AUTHOR("Embedded Edge, LLC");
MODULE_DESCRIPTION("Pb1550 mtd map driver");
MODULE_LICENSE("GPL");
Index: Config.in
===================================================================
RCS file: /home/cvs/mtd/drivers/mtd/maps/Config.in,v
retrieving revision 1.63
retrieving revision 1.64
diff -u -r1.63 -r1.64
--- Config.in 26 Nov 2003 21:26:09 -0000 1.63
+++ Config.in 27 Feb 2004 17:42:05 -0000 1.64
@@ -80,6 +80,11 @@
bool ' Db1x00 boot flash device' CONFIG_MTD_DB1X00_BOOT
bool ' Db1x00 user flash device (2nd bank)' CONFIG_MTD_DB1X00_USER
fi
+ tristate ' Pb1550 MTD support' CONFIG_MTD_PB1550
+ if [ "$CONFIG_MTD_PB1550" = "y" -o "$CONFIG_MTD_PB1550" = "m" ]; then
+ bool ' Pb1550 Boot Flash' CONFIG_MTD_PB1550_BOOT
+ bool ' Pb1550 User Parameter Flash' CONFIG_MTD_PB1550_USER
+ fi
dep_tristate ' Flash chip mapping on ITE QED-4N-S01B, Globespan IVR or custom board' CONFIG_MTD_CSTM_MIPS_IXX $CONFIG_MTD_CFI $CONFIG_MTD_JEDEC $CONFIG_MTD_PARTITIONS
if [ "$CONFIG_MTD_CSTM_MIPS_IXX" = "y" -o "$CONFIG_MTD_CSTM_MIPS_IXX" = "m" ]; then
hex ' Physical start address of flash mapping' CONFIG_MTD_CSTM_MIPS_IXX_START 0x8000000
Index: Makefile.common
===================================================================
RCS file: /home/cvs/mtd/drivers/mtd/maps/Makefile.common,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -r1.8 -r1.9
--- Makefile.common 26 Nov 2003 21:26:09 -0000 1.8
+++ Makefile.common 27 Feb 2004 17:42:05 -0000 1.9
@@ -49,6 +49,7 @@
obj-$(CONFIG_MTD_PCI) += pci.o
obj-$(CONFIG_MTD_PB1XXX) += pb1xxx-flash.o
obj-$(CONFIG_MTD_DB1X00) += db1x00-flash.o
+obj-$(CONFIG_MTD_PB1550) += pb1550-flash.o
obj-$(CONFIG_MTD_LASAT) += lasat.o
obj-$(CONFIG_MTD_AUTCPU12) += autcpu12-nvram.o
obj-$(CONFIG_MTD_EDB7312) += edb7312.o
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