Commit 68aa0fa8 authored by Marc St-Jean's avatar Marc St-Jean Committed by David Woodhouse

[MTD] PMC MSP71xx flash/rootfs mappings

Add flash and rootfs mappings for the PMC-Sierra MSP71xx devices.

This patch references some platform support files previously submitted to
the linux-mips@linux-mips.org list.
Signed-off-by: default avatarMarc St-Jean <Marc_St-Jean@pmc-sierra.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
parent 93339070
......@@ -69,6 +69,39 @@ config MTD_PHYSMAP_OF
physically into the CPU's memory. The mapping description here is
taken from OF device tree.
config MTD_PMC_MSP_EVM
tristate "CFI Flash device mapped on PMC-Sierra MSP"
depends on PMC_MSP && MTD_CFI
select MTD_PARTITIONS
help
This provides a 'mapping' driver which support the way
in which user-programmable flash chips are connected on the
PMC-Sierra MSP eval/demo boards
choice
prompt "Maximum mappable memory avialable for flash IO"
depends on MTD_PMC_MSP_EVM
default MSP_FLASH_MAP_LIMIT_32M
config MSP_FLASH_MAP_LIMIT_32M
bool "32M"
endchoice
config MSP_FLASH_MAP_LIMIT
hex
default "0x02000000"
depends on MSP_FLASH_MAP_LIMIT_32M
config MTD_PMC_MSP_RAMROOT
tristate "Embedded RAM block device for root on PMC-Sierra MSP"
depends on PMC_MSP_EMBEDDED_ROOTFS && \
(MTD_BLOCK || MTD_BLOCK_RO) && \
MTD_RAM
help
This provides support for the embedded root file system
on PMC MSP devices. This memory is mapped as a MTD block device.
config MTD_SUN_UFLASH
tristate "Sun Microsystems userflash support"
depends on SPARC && MTD_CFI
......
......@@ -27,6 +27,8 @@ obj-$(CONFIG_MTD_CEIVA) += ceiva.o
obj-$(CONFIG_MTD_OCTAGON) += octagon-5066.o
obj-$(CONFIG_MTD_PHYSMAP) += physmap.o
obj-$(CONFIG_MTD_PHYSMAP_OF) += physmap_of.o
obj-$(CONFIG_MTD_PMC_MSP_EVM) += pmcmsp-flash.o
obj-$(CONFIG_MTD_PMC_MSP_RAMROOT)+= pmcmsp-ramroot.o
obj-$(CONFIG_MTD_PNC2000) += pnc2000.o
obj-$(CONFIG_MTD_PCMCIA) += pcmciamtd.o
obj-$(CONFIG_MTD_RPXLITE) += rpxlite.o
......
/*
* Mapping of a custom board with both AMD CFI and JEDEC flash in partitions.
* Config with both CFI and JEDEC device support.
*
* Basically physmap.c with the addition of partitions and
* an array of mapping info to accomodate more than one flash type per board.
*
* Copyright 2005-2007 PMC-Sierra, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#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 <msp_prom.h>
#include <msp_regs.h>
static struct mtd_info **msp_flash;
static struct mtd_partition **msp_parts;
static struct map_info *msp_maps;
static int fcnt;
#define DEBUG_MARKER printk(KERN_NOTICE "%s[%d]\n",__FUNCTION__,__LINE__)
int __init init_msp_flash(void)
{
int i, j;
int offset, coff;
char *env;
int pcnt;
char flash_name[] = "flash0";
char part_name[] = "flash0_0";
unsigned addr, size;
/* If ELB is disabled by "ful-mux" mode, we can't get at flash */
if ((*DEV_ID_REG & DEV_ID_SINGLE_PC) &&
(*ELB_1PC_EN_REG & SINGLE_PCCARD)) {
printk(KERN_NOTICE "Single PC Card mode: no flash access\n");
return -ENXIO;
}
/* examine the prom environment for flash devices */
for (fcnt = 0; (env = prom_getenv(flash_name)); fcnt++)
flash_name[5] = '0' + fcnt + 1;
if (fcnt < 1)
return -ENXIO;
printk(KERN_NOTICE "Found %d PMC flash devices\n", fcnt);
msp_flash = (struct mtd_info **)kmalloc(
fcnt * sizeof(struct map_info *), GFP_KERNEL);
msp_parts = (struct mtd_partition **)kmalloc(
fcnt * sizeof(struct mtd_partition *), GFP_KERNEL);
msp_maps = (struct map_info *)kmalloc(
fcnt * sizeof(struct mtd_info), GFP_KERNEL);
memset(msp_maps, 0, fcnt * sizeof(struct mtd_info));
/* loop over the flash devices, initializing each */
for (i = 0; i < fcnt; i++) {
/* examine the prom environment for flash partititions */
part_name[5] = '0' + i;
part_name[7] = '0';
for (pcnt = 0; (env = prom_getenv(part_name)); pcnt++)
part_name[7] = '0' + pcnt + 1;
if (pcnt == 0) {
printk(KERN_NOTICE "Skipping flash device %d "
"(no partitions defined)\n", i);
continue;
}
msp_parts[i] = (struct mtd_partition *)kmalloc(
pcnt * sizeof(struct mtd_partition), GFP_KERNEL);
memset(msp_parts[i], 0, pcnt * sizeof(struct mtd_partition));
/* now initialize the devices proper */
flash_name[5] = '0' + i;
env = prom_getenv(flash_name);
if (sscanf(env, "%x:%x", &addr, &size) < 2)
return -ENXIO;
addr = CPHYSADDR(addr);
printk(KERN_NOTICE
"MSP flash device \"%s\": 0x%08x at 0x%08x\n",
flash_name, size, addr);
/* This must matchs the actual size of the flash chip */
msp_maps[i].size = size;
msp_maps[i].phys = addr;
/*
* Platforms have a specific limit of the size of memory
* which may be mapped for flash:
*/
if (size > CONFIG_MSP_FLASH_MAP_LIMIT)
size = CONFIG_MSP_FLASH_MAP_LIMIT;
msp_maps[i].virt = ioremap(addr, size);
msp_maps[i].bankwidth = 1;
msp_maps[i].name = strncpy(kmalloc(7, GFP_KERNEL),
flash_name, 7);
if (msp_maps[i].virt == NULL)
return -ENXIO;
for (j = 0; j < pcnt; j++) {
part_name[5] = '0' + i;
part_name[7] = '0' + j;
env = prom_getenv(part_name);
if (sscanf(env, "%x:%x:%n", &offset, &size, &coff) < 2)
return -ENXIO;
msp_parts[i][j].size = size;
msp_parts[i][j].offset = offset;
msp_parts[i][j].name = env + coff;
}
/* now probe and add the device */
simple_map_init(&msp_maps[i]);
msp_flash[i] = do_map_probe("cfi_probe", &msp_maps[i]);
if (msp_flash[i]) {
msp_flash[i]->owner = THIS_MODULE;
add_mtd_partitions(msp_flash[i], msp_parts[i], pcnt);
} else {
printk(KERN_ERR "map probe failed for flash\n");
return -ENXIO;
}
}
return 0;
}
static void __exit cleanup_msp_flash(void)
{
int i;
for (i = 0; i < sizeof(msp_flash) / sizeof(struct mtd_info **); i++) {
del_mtd_partitions(msp_flash[i]);
map_destroy(msp_flash[i]);
iounmap((void *)msp_maps[i].virt);
/* free the memory */
kfree(msp_maps[i].name);
kfree(msp_parts[i]);
}
kfree(msp_flash);
kfree(msp_parts);
kfree(msp_maps);
}
MODULE_AUTHOR("PMC-Sierra, Inc");
MODULE_DESCRIPTION("MTD map driver for PMC-Sierra MSP boards");
MODULE_LICENSE("GPL");
module_init(init_msp_flash);
module_exit(cleanup_msp_flash);
/*
* Mapping of the rootfs in a physical region of memory
*
* Copyright (C) 2005-2007 PMC-Sierra Inc.
* Author: Andrew Hughes, Andrew_Hughes@pmc-sierra.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/root_dev.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <asm/io.h>
#include <msp_prom.h>
static struct mtd_info *rr_mtd;
struct map_info rr_map = {
.name = "ramroot",
.bankwidth = 4,
};
static int __init init_rrmap(void)
{
void *ramroot_start;
unsigned long ramroot_size;
/* Check for supported rootfs types */
if (get_ramroot(&ramroot_start, &ramroot_size)) {
rr_map.phys = CPHYSADDR(ramroot_start);
rr_map.size = ramroot_size;
printk(KERN_NOTICE
"PMC embedded root device: 0x%08lx @ 0x%08lx\n",
rr_map.size, (unsigned long)rr_map.phys);
} else {
printk(KERN_ERR
"init_rrmap: no supported embedded rootfs detected!\n");
return -ENXIO;
}
/* Map rootfs to I/O space for block device driver */
rr_map.virt = ioremap(rr_map.phys, rr_map.size);
if (!rr_map.virt) {
printk(KERN_ERR "Failed to ioremap\n");
return -EIO;
}
simple_map_init(&rr_map);
rr_mtd = do_map_probe("map_ram", &rr_map);
if (rr_mtd) {
rr_mtd->owner = THIS_MODULE;
add_mtd_device(rr_mtd);
ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, rr_mtd->index);
return 0;
}
iounmap(rr_map.virt);
return -ENXIO;
}
static void __exit cleanup_rrmap(void)
{
del_mtd_device(rr_mtd);
map_destroy(rr_mtd);
iounmap(rr_map.virt);
rr_map.virt = NULL;
}
MODULE_AUTHOR("PMC-Sierra, Inc");
MODULE_DESCRIPTION("MTD map driver for embedded PMC-Sierra MSP filesystem");
MODULE_LICENSE("GPL");
module_init(init_rrmap);
module_exit(cleanup_rrmap);
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