[MTD] PMC MSP71xx flash/rootfs mappings (68aa0fa8) · Commits · 戴 / test

drivers/mtd/maps/Kconfig

+33 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/mtd/maps/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/mtd/maps/pmcmsp-flash.c

0 → 100644

+184 −0

Original line number	Diff line number	Diff line
		/*
		* 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);

drivers/mtd/maps/pmcmsp-ramroot.c

0 → 100644

+105 −0

Original line number	Diff line number	Diff line
		/*
		* 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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