[PATCH] mtd: PMC MSP71xx flash/rootfs mappings
Patch to add flash and rootfs mappings for the PMC-Sierra
MSP71xx devices.
This patch references some platform support files previously
submitted to the linux-mips@xxxxxxxxxxxxxx list.
Thanks,
Marc
Signed-off-by: Marc St-Jean <Marc_St-Jean@xxxxxxxxxxxxxx>
---
This patch was first posted on Feb. 23rd. I didn't receive any
feedback but I'm reposting based on feedback to other patches.
If this is no longer the maintainer address please let me know.
Changes:
-Cleanup on style and formatting for comments, macros, etc.
Kconfig | 33 +++++++++
Makefile | 2
pmcmsp-flash.c | 184 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
pmcmsp-ramroot.c | 105 +++++++++++++++++++++++++++++++
4 files changed, 324 insertions(+)
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index bbf0553..e28a1ad 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -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
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 071d0bf..de036c5 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -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
diff --git a/drivers/mtd/maps/pmcmsp-flash.c b/drivers/mtd/maps/pmcmsp-flash.c
new file mode 100644
index 0000000..24cd8c0
--- /dev/null
+++ b/drivers/mtd/maps/pmcmsp-flash.c
@@ -0,0 +1,184 @@
+/*
+ * 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);
diff --git a/drivers/mtd/maps/pmcmsp-ramroot.c b/drivers/mtd/maps/pmcmsp-ramroot.c
new file mode 100644
index 0000000..18049bc
--- /dev/null
+++ b/drivers/mtd/maps/pmcmsp-ramroot.c
@@ -0,0 +1,105 @@
+/*
+ * Mapping of the rootfs in a physical region of memory
+ *
+ * Copyright (C) 2005-2007 PMC-Sierra Inc.
+ * Author: Andrew Hughes, Andrew_Hughes@xxxxxxxxxxxxxx
+ *
+ * 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);
