sun_uflash: Convert to pure OF driver. (0e52fe8c) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/mtd/maps/sun_uflash.c

+35 −38

Original line number	Diff line number	Diff line
		/*
		*
		* sun_uflash - Driver implementation for user-programmable flash
		* present on many Sun Microsystems SME boardsets.
		/* sun_uflash.c - Driver for user-programmable flash on
		* Sun Microsystems SME boardsets.
		*
		* This driver does NOT provide access to the OBP-flash for
		* safety reasons-- use <linux>/drivers/sbus/char/flash.c instead.
		*
		* Copyright (c) 2001 Eric Brower (ebrower@usa.net)
		*
		*/

		#include <linux/kernel.h>
		@@ -16,8 +13,8 @@
		#include <linux/errno.h>
		#include <linux/init.h>
		#include <linux/ioport.h>
		#include <asm/ebus.h>
		#include <asm/oplib.h>
		#include <linux/of.h>
		#include <linux/of_device.h>
		#include <asm/prom.h>
		#include <asm/uaccess.h>
		#include <asm/io.h>
		@@ -26,67 +23,65 @@
		#include <linux/mtd/map.h>

		#define UFLASH_OBPNAME "flashprom"
		#define UFLASH_DEVNAME "userflash"
		#define DRIVER_NAME "sun_uflash"
		#define PFX DRIVER_NAME ": "

		#define UFLASH_WINDOW_SIZE 0x200000
		#define UFLASH_BUSWIDTH 1 /* EBus is 8-bit */

		MODULE_AUTHOR("Eric Brower <ebrower@usa.net>");
		MODULE_DESCRIPTION("User-programmable flash device on Sun Microsystems boardsets");
		MODULE_SUPPORTED_DEVICE("userflash");
		MODULE_SUPPORTED_DEVICE(DRIVER_NAME);
		MODULE_LICENSE("GPL");
		MODULE_VERSION("2.0");
		MODULE_VERSION("2.1");

		static LIST_HEAD(device_list);
		struct uflash_dev {
		const char name; / device name */
		struct map_info map; /* mtd map info */
		struct mtd_info mtd; / mtd info */
		};


		struct map_info uflash_map_templ = {
		.name = "SUNW,???-????",
		.size = UFLASH_WINDOW_SIZE,
		.bankwidth = UFLASH_BUSWIDTH,
		};

		int uflash_devinit(struct linux_ebus_device edev, struct device_node dp)
		int uflash_devinit(struct of_device op, struct device_node dp)
		{
		struct uflash_dev *up;
		struct resource *res;

		res = &edev->resource[0];

		if (edev->num_addrs != 1) {
		if (op->resource[1].flags) {
		/* Non-CFI userflash device-- once I find one we
		* can work on supporting it.
		*/
		printk("%s: unsupported device at 0x%llx (%d regs): " \
		"email ebrower@usa.net\n",
		dp->full_name, (unsigned long long)res->start,
		edev->num_addrs);
		printk(KERN_ERR PFX "Unsupported device at %s, 0x%llx\n",
		dp->full_name, (unsigned long long)op->resource[0].start);

		return -ENODEV;
		}

		up = kzalloc(sizeof(struct uflash_dev), GFP_KERNEL);
		if (!up)
		if (!up) {
		printk(KERN_ERR PFX "Cannot allocate struct uflash_dev\n");
		return -ENOMEM;
		}

		/* copy defaults and tweak parameters */
		memcpy(&up->map, &uflash_map_templ, sizeof(uflash_map_templ));
		up->map.size = (res->end - res->start) + 1UL;

		up->map.size = resource_size(&op->resource[0]);

		up->name = of_get_property(dp, "model", NULL);
		if (up->name && 0 < strlen(up->name))
		up->map.name = (char *)up->name;

		up->map.phys = res->start;
		up->map.phys = op->resource[0].start;

		up->map.virt = ioremap_nocache(res->start, up->map.size);
		up->map.virt = of_ioremap(&op->resource[0], 0, up->map.size,
		DRIVER_NAME);
		if (!up->map.virt) {
		printk("%s: Failed to map device.\n", dp->full_name);
		printk(KERN_ERR PFX "Failed to map device.\n");
		kfree(up);

		return -EINVAL;
		@@ -97,7 +92,7 @@ int uflash_devinit(struct linux_ebus_device edev, struct device_node dp)
		/* MTD registration */
		up->mtd = do_map_probe("cfi_probe", &up->map);
		if (!up->mtd) {
		iounmap(up->map.virt);
		of_iounmap(&op->resource[0], up->map.virt, up->map.size);
		kfree(up);

		return -ENXIO;
		@@ -107,32 +102,34 @@ int uflash_devinit(struct linux_ebus_device edev, struct device_node dp)

		add_mtd_device(up->mtd);

		dev_set_drvdata(&edev->ofdev.dev, up);
		dev_set_drvdata(&op->dev, up);

		return 0;
		}

		static int __devinit uflash_probe(struct of_device dev, const struct of_device_id match)
		static int __devinit uflash_probe(struct of_device op, const struct of_device_id match)
		{
		struct linux_ebus_device *edev = to_ebus_device(&dev->dev);
		struct device_node *dp = dev->node;
		struct device_node *dp = op->node;

		if (of_find_property(dp, "user", NULL))
		/* Flashprom must have the "user" property in order to
		* be used by this driver.
		*/
		if (!of_find_property(dp, "user", NULL))
		return -ENODEV;

		return uflash_devinit(edev, dp);
		return uflash_devinit(op, dp);
		}

		static int __devexit uflash_remove(struct of_device *dev)
		static int __devexit uflash_remove(struct of_device *op)
		{
		struct uflash_dev *up = dev_get_drvdata(&dev->dev);
		struct uflash_dev *up = dev_get_drvdata(&op->dev);

		if (up->mtd) {
		del_mtd_device(up->mtd);
		map_destroy(up->mtd);
		}
		if (up->map.virt) {
		iounmap(up->map.virt);
		of_iounmap(&op->resource[0], up->map.virt, up->map.size);
		up->map.virt = NULL;
		}

		@@ -151,7 +148,7 @@ static struct of_device_id uflash_match[] = {
		MODULE_DEVICE_TABLE(of, uflash_match);

		static struct of_platform_driver uflash_driver = {
		.name = UFLASH_DEVNAME,
		.name = DRIVER_NAME,
		.match_table = uflash_match,
		.probe = uflash_probe,
		.remove = __devexit_p(uflash_remove),
		@@ -159,7 +156,7 @@ static struct of_platform_driver uflash_driver = {

		static int __init uflash_init(void)
		{
		return of_register_driver(&uflash_driver, &ebus_bus_type);
		return of_register_driver(&uflash_driver, &of_bus_type);
		}

		static void __exit uflash_exit(void)