Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 259 insertions, 0 deletions

diff --git a/drivers/mtd/maps/ixp4xx.c b/drivers/mtd/maps/ixp4xx.c
new file mode 100644
index 000000000000..5afe660aa2c4
--- /dev/null
+++ b/drivers/mtd/maps/ixp4xx.c
@@ -0,0 +1,259 @@
+/*
+ * $Id: ixp4xx.c,v 1.7 2004/11/04 13:24:15 gleixner Exp $
+ *
+ * drivers/mtd/maps/ixp4xx.c
+ *
+ * MTD Map file for IXP4XX based systems. Please do not make per-board
+ * changes in here. If your board needs special setup, do it in your
+ * platform level code in arch/arm/mach-ixp4xx/board-setup.c
+ *
+ * Original Author: Intel Corporation
+ * Maintainer: Deepak Saxena <dsaxena@mvista.com>
+ *
+ * Copyright (C) 2002 Intel Corporation
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <asm/io.h>
+#include <asm/mach-types.h>
+#include <asm/mach/flash.h>
+
+#include <linux/reboot.h>
+
+#ifndef __ARMEB__
+#define BYTE0(h)        ((h) & 0xFF)
+#define BYTE1(h)        (((h) >> 8) & 0xFF)
+#else
+#define BYTE0(h)        (((h) >> 8) & 0xFF)
+#define BYTE1(h)        ((h) & 0xFF)
+#endif
+
+static map_word ixp4xx_read16(struct map_info *map, unsigned long ofs)
+{
+        map_word val;
+        val.x[0] = *(__u16 *) (map->map_priv_1 + ofs);
+        return val;
+}
+
+/*
+ * The IXP4xx expansion bus only allows 16-bit wide acceses
+ * when attached to a 16-bit wide device (such as the 28F128J3A),
+ * so we can't just memcpy_fromio().
+ */
+static void ixp4xx_copy_from(struct map_info *map, void *to,
+                             unsigned long from, ssize_t len)
+{
+        int i;
+        u8 *dest = (u8 *) to;
+        u16 *src = (u16 *) (map->map_priv_1 + from);
+        u16 data;
+
+        for (i = 0; i < (len / 2); i++) {
+                data = src[i];
+                dest[i * 2] = BYTE0(data);
+                dest[i * 2 + 1] = BYTE1(data);
+        }
+
+        if (len & 1)
+                dest[len - 1] = BYTE0(src[i]);
+}
+
+/* 
+ * Unaligned writes are ignored, causing the 8-bit
+ * probe to fail and proceed to the 16-bit probe (which succeeds).
+ */
+static void ixp4xx_probe_write16(struct map_info *map, map_word d, unsigned long adr)
+{
+        if (!(adr & 1))
+               *(__u16 *) (map->map_priv_1 + adr) = d.x[0];
+}
+
+/* 
+ * Fast write16 function without the probing check above
+ */
+static void ixp4xx_write16(struct map_info *map, map_word d, unsigned long adr)
+{
+       *(__u16 *) (map->map_priv_1 + adr) = d.x[0];
+}
+
+struct ixp4xx_flash_info {
+        struct mtd_info *mtd;
+        struct map_info map;
+        struct mtd_partition *partitions;
+        struct resource *res;
+};
+
+static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
+
+static int ixp4xx_flash_remove(struct device *_dev)
+{
+        struct platform_device *dev = to_platform_device(_dev);
+        struct flash_platform_data *plat = dev->dev.platform_data;
+        struct ixp4xx_flash_info *info = dev_get_drvdata(&dev->dev);
+        map_word d;
+
+        dev_set_drvdata(&dev->dev, NULL);
+
+        if(!info)
+                return 0;
+
+        /*
+         * This is required for a soft reboot to work.
+         */
+        d.x[0] = 0xff;
+        ixp4xx_write16(&info->map, d, 0x55 * 0x2);
+
+        if (info->mtd) {
+                del_mtd_partitions(info->mtd);
+                map_destroy(info->mtd);
+        }
+        if (info->map.map_priv_1)
+                iounmap((void *) info->map.map_priv_1);
+
+        if (info->partitions)
+                kfree(info->partitions);
+
+        if (info->res) {
+                release_resource(info->res);
+                kfree(info->res);
+        }
+
+        if (plat->exit)
+                plat->exit();
+
+        /* Disable flash write */
+        *IXP4XX_EXP_CS0 &= ~IXP4XX_FLASH_WRITABLE;
+
+        return 0;
+}
+
+static int ixp4xx_flash_probe(struct device *_dev)
+{
+        struct platform_device *dev = to_platform_device(_dev);
+        struct flash_platform_data *plat = dev->dev.platform_data;
+        struct ixp4xx_flash_info *info;
+        int err = -1;
+
+        if (!plat)
+                return -ENODEV;
+
+        if (plat->init) {
+                err = plat->init();
+                if (err)
+                        return err;
+        }
+
+        info = kmalloc(sizeof(struct ixp4xx_flash_info), GFP_KERNEL);
+        if(!info) {
+                err = -ENOMEM;
+                goto Error;
+        }       
+        memzero(info, sizeof(struct ixp4xx_flash_info));
+
+        dev_set_drvdata(&dev->dev, info);
+
+        /* 
+         * Enable flash write 
+         * TODO: Move this out to board specific code
+         */
+        *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
+
+        /*
+         * Tell the MTD layer we're not 1:1 mapped so that it does
+         * not attempt to do a direct access on us.
+         */
+        info->map.phys = NO_XIP;
+        info->map.size = dev->resource->end - dev->resource->start + 1;
+
+        /*
+         * We only support 16-bit accesses for now. If and when
+         * any board use 8-bit access, we'll fixup the driver to
+         * handle that.
+         */
+        info->map.bankwidth = 2;
+        info->map.name = dev->dev.bus_id;
+        info->map.read = ixp4xx_read16,
+        info->map.write = ixp4xx_probe_write16,
+        info->map.copy_from = ixp4xx_copy_from,
+
+        info->res = request_mem_region(dev->resource->start, 
+                        dev->resource->end - dev->resource->start + 1, 
+                        "IXP4XXFlash");
+        if (!info->res) {
+                printk(KERN_ERR "IXP4XXFlash: Could not reserve memory region\n");
+                err = -ENOMEM;
+                goto Error;
+        }
+
+        info->map.map_priv_1 = ioremap(dev->resource->start,
+                            dev->resource->end - dev->resource->start + 1);
+        if (!info->map.map_priv_1) {
+                printk(KERN_ERR "IXP4XXFlash: Failed to ioremap region\n");
+                err = -EIO;
+                goto Error;
+        }
+
+        info->mtd = do_map_probe(plat->map_name, &info->map);
+        if (!info->mtd) {
+                printk(KERN_ERR "IXP4XXFlash: map_probe failed\n");
+                err = -ENXIO;
+                goto Error;
+        }
+        info->mtd->owner = THIS_MODULE;
+        
+        /* Use the fast version */
+        info->map.write = ixp4xx_write16,
+
+        err = parse_mtd_partitions(info->mtd, probes, &info->partitions, 0);
+        if (err > 0) {
+                err = add_mtd_partitions(info->mtd, info->partitions, err);
+                if(err)
+                        printk(KERN_ERR "Could not parse partitions\n");
+        }
+
+        if (err)
+                goto Error;
+
+        return 0;
+
+Error:
+        ixp4xx_flash_remove(_dev);
+        return err;
+}
+
+static struct device_driver ixp4xx_flash_driver = {
+        .name           = "IXP4XX-Flash",
+        .bus            = &platform_bus_type,
+        .probe          = ixp4xx_flash_probe,
+        .remove         = ixp4xx_flash_remove,
+};
+
+static int __init ixp4xx_flash_init(void)
+{
+        return driver_register(&ixp4xx_flash_driver);
+}
+
+static void __exit ixp4xx_flash_exit(void)
+{
+        driver_unregister(&ixp4xx_flash_driver);
+}
+
+
+module_init(ixp4xx_flash_init);
+module_exit(ixp4xx_flash_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MTD map driver for Intel IXP4xx systems")
+MODULE_AUTHOR("Deepak Saxena");
+