[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: Marc St-Jean <Marc_St-Jean@pmc-sierra.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
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@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);