1 files changed, 217 insertions, 0 deletions

diff --git a/drivers/mtd/maps/integrator-flash.c b/drivers/mtd/maps/integrator-flash.c
new file mode 100644
index 000000000000..e39a98a0171c
--- /dev/null
+++ b/drivers/mtd/maps/integrator-flash.c
@@ -0,0 +1,217 @@
+/*======================================================================
+
+    drivers/mtd/maps/integrator-flash.c: ARM Integrator flash map driver
+  
+    Copyright (C) 2000 ARM Limited
+    Copyright (C) 2003 Deep Blue Solutions Ltd.
+  
+   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 program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+  
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+  
+   This is access code for flashes using ARM's flash partitioning 
+   standards.
+
+   $Id: integrator-flash.c,v 1.18 2004/11/01 13:26:15 rmk Exp $
+
+======================================================================*/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/init.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/mach/flash.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#ifdef CONFIG_ARCH_P720T
+#define FLASH_BASE              (0x04000000)
+#define FLASH_SIZE              (64*1024*1024)
+#endif
+
+struct armflash_info {
+        struct flash_platform_data *plat;
+        struct resource         *res;
+        struct mtd_partition    *parts;
+        struct mtd_info         *mtd;
+        struct map_info         map;
+};
+
+static void armflash_set_vpp(struct map_info *map, int on)
+{
+        struct armflash_info *info = container_of(map, struct armflash_info, map);
+
+        if (info->plat && info->plat->set_vpp)
+                info->plat->set_vpp(on);
+}
+
+static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL };
+
+static int armflash_probe(struct device *_dev)
+{
+        struct platform_device *dev = to_platform_device(_dev);
+        struct flash_platform_data *plat = dev->dev.platform_data;
+        struct resource *res = dev->resource;
+        unsigned int size = res->end - res->start + 1;
+        struct armflash_info *info;
+        int err;
+        void __iomem *base;
+
+        info = kmalloc(sizeof(struct armflash_info), GFP_KERNEL);
+        if (!info) {
+                err = -ENOMEM;
+                goto out;
+        }
+
+        memset(info, 0, sizeof(struct armflash_info));
+
+        info->plat = plat;
+        if (plat && plat->init) {
+                err = plat->init();
+                if (err)
+                        goto no_resource;
+        }
+
+        info->res = request_mem_region(res->start, size, "armflash");
+        if (!info->res) {
+                err = -EBUSY;
+                goto no_resource;
+        }
+
+        base = ioremap(res->start, size);
+        if (!base) {
+                err = -ENOMEM;
+                goto no_mem;
+        }
+
+        /*
+         * look for CFI based flash parts fitted to this board
+         */
+        info->map.size          = size;
+        info->map.bankwidth     = plat->width;
+        info->map.phys          = res->start;
+        info->map.virt          = base;
+        info->map.name          = dev->dev.bus_id;
+        info->map.set_vpp       = armflash_set_vpp;
+
+        simple_map_init(&info->map);
+
+        /*
+         * Also, the CFI layer automatically works out what size
+         * of chips we have, and does the necessary identification
+         * for us automatically.
+         */
+        info->mtd = do_map_probe(plat->map_name, &info->map);
+        if (!info->mtd) {
+                err = -ENXIO;
+                goto no_device;
+        }
+
+        info->mtd->owner = THIS_MODULE;
+
+        err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0);
+        if (err > 0) {
+                err = add_mtd_partitions(info->mtd, info->parts, err);
+                if (err)
+                        printk(KERN_ERR
+                               "mtd partition registration failed: %d\n", err);
+        }
+
+        if (err == 0)
+                dev_set_drvdata(&dev->dev, info);
+
+        /*
+         * If we got an error, free all resources.
+         */
+        if (err < 0) {
+                if (info->mtd) {
+                        del_mtd_partitions(info->mtd);
+                        map_destroy(info->mtd);
+                }
+                if (info->parts)
+                        kfree(info->parts);
+
+ no_device:
+                iounmap(base);
+ no_mem:
+                release_mem_region(res->start, size);
+ no_resource:
+                if (plat && plat->exit)
+                        plat->exit();
+                kfree(info);
+        }
+ out:
+        return err;
+}
+
+static int armflash_remove(struct device *_dev)
+{
+        struct platform_device *dev = to_platform_device(_dev);
+        struct armflash_info *info = dev_get_drvdata(&dev->dev);
+
+        dev_set_drvdata(&dev->dev, NULL);
+
+        if (info) {
+                if (info->mtd) {
+                        del_mtd_partitions(info->mtd);
+                        map_destroy(info->mtd);
+                }
+                if (info->parts)
+                        kfree(info->parts);
+
+                iounmap(info->map.virt);
+                release_resource(info->res);
+                kfree(info->res);
+
+                if (info->plat && info->plat->exit)
+                        info->plat->exit();
+
+                kfree(info);
+        }
+
+        return 0;
+}
+
+static struct device_driver armflash_driver = {
+        .name           = "armflash",
+        .bus            = &platform_bus_type,
+        .probe          = armflash_probe,
+        .remove         = armflash_remove,
+};
+
+static int __init armflash_init(void)
+{
+        return driver_register(&armflash_driver);
+}
+
+static void __exit armflash_exit(void)
+{
+        driver_unregister(&armflash_driver);
+}
+
+module_init(armflash_init);
+module_exit(armflash_exit);
+
+MODULE_AUTHOR("ARM Ltd");
+MODULE_DESCRIPTION("ARM Integrator CFI map driver");
+MODULE_LICENSE("GPL");