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+/*
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+ * Map driver for Intel XScale PXA2xx platforms.
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+ *
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+ * Author: Nicolas Pitre
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+ * Copyright: (C) 2001 MontaVista Software Inc.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <linux/platform_device.h>
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+#include <linux/dma-mapping.h>
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/map.h>
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+#include <linux/mtd/partitions.h>
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+
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+#include <asm/io.h>
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+#include <asm/hardware.h>
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+
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+#include <asm/mach/flash.h>
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+
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+static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
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+ ssize_t len)
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+{
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+ consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE);
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+}
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+
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+struct pxa2xx_flash_info {
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+ struct mtd_partition *parts;
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+ int nr_parts;
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+ struct mtd_info *mtd;
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+ struct map_info map;
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+};
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+
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+
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+static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
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+
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+
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+static int __init pxa2xx_flash_probe(struct device *dev)
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+{
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+ struct platform_device *pdev = to_platform_device(dev);
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+ struct flash_platform_data *flash = pdev->dev.platform_data;
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+ struct pxa2xx_flash_info *info;
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+ struct mtd_partition *parts;
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+ struct resource *res;
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+ int ret = 0;
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+
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+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ if (!res)
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+ return -ENODEV;
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+
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+ info = kmalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
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+ if (!info)
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+ return -ENOMEM;
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+
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+ memset(info, 0, sizeof(struct pxa2xx_flash_info));
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+ info->map.name = (char *) flash->name;
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+ info->map.bankwidth = flash->width;
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+ info->map.phys = res->start;
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+ info->map.size = res->end - res->start + 1;
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+ info->parts = flash->parts;
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+ info->nr_parts = flash->nr_parts;
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+
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+ info->map.virt = ioremap(info->map.phys, info->map.size);
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+ if (!info->map.virt) {
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+ printk(KERN_WARNING "Failed to ioremap %s\n",
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+ info->map.name);
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+ return -ENOMEM;
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+ }
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+ info->map.cached =
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+ ioremap_cached(info->map.phys, info->map.size);
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+ if (!info->map.cached)
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+ printk(KERN_WARNING "Failed to ioremap cached %s\n",
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+ info->map.name);
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+ info->map.inval_cache = pxa2xx_map_inval_cache;
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+ simple_map_init(&info->map);
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+
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+ printk(KERN_NOTICE
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+ "Probing %s at physical address 0x%08lx"
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+ " (%d-bit bankwidth)\n",
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+ info->map.name, (unsigned long)info->map.phys,
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+ info->map.bankwidth * 8);
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+
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+ info->mtd = do_map_probe(flash->map_name, &info->map);
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+
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+ if (!info->mtd) {
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+ iounmap((void *)info->map.virt);
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+ if (info->map.cached)
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+ iounmap(info->map.cached);
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+ return -EIO;
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+ }
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+ info->mtd->owner = THIS_MODULE;
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+
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+#ifdef CONFIG_MTD_PARTITIONS
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+ ret = parse_mtd_partitions(info->mtd, probes, &parts, 0);
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+
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+ if (ret > 0) {
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+ info->nr_parts = ret;
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+ info->parts = parts;
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+ }
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+#endif
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+
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+ if (info->nr_parts) {
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+ add_mtd_partitions(info->mtd, info->parts,
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+ info->nr_parts);
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+ } else {
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+ printk("Registering %s as whole device\n",
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+ info->map.name);
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+ add_mtd_device(info->mtd);
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+ }
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+
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+ dev_set_drvdata(dev, info);
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+ return 0;
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+}
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+
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+static int __exit pxa2xx_flash_remove(struct device *dev)
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+{
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+ struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
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+
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+ dev_set_drvdata(dev, NULL);
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+
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+#ifdef CONFIG_MTD_PARTITIONS
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+ if (info->nr_parts)
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+ del_mtd_partitions(info->mtd);
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+ else
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+#endif
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+ del_mtd_device(info->mtd);
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+
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+ map_destroy(info->mtd);
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+ iounmap(info->map.virt);
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+ if (info->map.cached)
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+ iounmap(info->map.cached);
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+ kfree(info->parts);
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+ kfree(info);
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+ return 0;
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+}
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+
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+#ifdef CONFIG_PM
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+static int pxa2xx_flash_suspend(struct device *dev, pm_message_t state)
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+{
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+ struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
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+ int ret = 0;
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+
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+ if (info->mtd && info->mtd->suspend)
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+ ret = info->mtd->suspend(info->mtd);
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+ return ret;
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+}
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+
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+static int pxa2xx_flash_resume(struct device *dev)
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+{
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+ struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
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+
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+ if (info->mtd && info->mtd->resume)
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+ info->mtd->resume(info->mtd);
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+ return 0;
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+}
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+static void pxa2xx_flash_shutdown(struct device *dev)
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+{
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+ struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
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+
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+ if (info && info->mtd->suspend(info->mtd) == 0)
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+ info->mtd->resume(info->mtd);
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+}
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+#else
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+#define pxa2xx_flash_suspend NULL
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+#define pxa2xx_flash_resume NULL
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+#define pxa2xx_flash_shutdown NULL
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+#endif
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+
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+static struct device_driver pxa2xx_flash_driver = {
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+ .name = "pxa2xx-flash",
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+ .bus = &platform_bus_type,
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+ .probe = pxa2xx_flash_probe,
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+ .remove = __exit_p(pxa2xx_flash_remove),
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+ .suspend = pxa2xx_flash_suspend,
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+ .resume = pxa2xx_flash_resume,
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+ .shutdown = pxa2xx_flash_shutdown,
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+};
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+
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+static int __init init_pxa2xx_flash(void)
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+{
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+ return driver_register(&pxa2xx_flash_driver);
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+}
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+
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+static void __exit cleanup_pxa2xx_flash(void)
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+{
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+ driver_unregister(&pxa2xx_flash_driver);
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+}
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+
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+module_init(init_pxa2xx_flash);
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+module_exit(cleanup_pxa2xx_flash);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>");
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+MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");
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Todd Poynor