6417f03132
MODULE_SUPPORTED_DEVICE was added in pre-git era and never was implemented. We can safely remove it, because the kernel has grown to have many more reliable mechanisms to determine if device is supported or not. Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
160 lines
3.5 KiB
C
160 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* sun_uflash.c - Driver for user-programmable flash on
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* Sun Microsystems SME boardsets.
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*
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* This driver does NOT provide access to the OBP-flash for
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* safety reasons-- use <linux>/drivers/sbus/char/flash.c instead.
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*
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* Copyright (c) 2001 Eric Brower (ebrower@usa.net)
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/slab.h>
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#include <asm/prom.h>
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#include <linux/uaccess.h>
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#include <asm/io.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#define UFLASH_OBPNAME "flashprom"
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#define DRIVER_NAME "sun_uflash"
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#define PFX DRIVER_NAME ": "
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#define UFLASH_WINDOW_SIZE 0x200000
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#define UFLASH_BUSWIDTH 1 /* EBus is 8-bit */
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MODULE_AUTHOR("Eric Brower <ebrower@usa.net>");
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MODULE_DESCRIPTION("User-programmable flash device on Sun Microsystems boardsets");
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MODULE_LICENSE("GPL");
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MODULE_VERSION("2.1");
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struct uflash_dev {
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const char *name; /* device name */
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struct map_info map; /* mtd map info */
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struct mtd_info *mtd; /* mtd info */
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};
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struct map_info uflash_map_templ = {
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.name = "SUNW,???-????",
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.size = UFLASH_WINDOW_SIZE,
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.bankwidth = UFLASH_BUSWIDTH,
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};
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int uflash_devinit(struct platform_device *op, struct device_node *dp)
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{
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struct uflash_dev *up;
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if (op->resource[1].flags) {
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/* Non-CFI userflash device-- once I find one we
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* can work on supporting it.
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*/
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printk(KERN_ERR PFX "Unsupported device at %pOF, 0x%llx\n",
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dp, (unsigned long long)op->resource[0].start);
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return -ENODEV;
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}
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up = kzalloc(sizeof(struct uflash_dev), GFP_KERNEL);
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if (!up) {
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printk(KERN_ERR PFX "Cannot allocate struct uflash_dev\n");
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return -ENOMEM;
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}
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/* copy defaults and tweak parameters */
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memcpy(&up->map, &uflash_map_templ, sizeof(uflash_map_templ));
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up->map.size = resource_size(&op->resource[0]);
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up->name = of_get_property(dp, "model", NULL);
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if (up->name && 0 < strlen(up->name))
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up->map.name = up->name;
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up->map.phys = op->resource[0].start;
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up->map.virt = of_ioremap(&op->resource[0], 0, up->map.size,
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DRIVER_NAME);
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if (!up->map.virt) {
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printk(KERN_ERR PFX "Failed to map device.\n");
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kfree(up);
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return -EINVAL;
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}
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simple_map_init(&up->map);
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/* MTD registration */
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up->mtd = do_map_probe("cfi_probe", &up->map);
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if (!up->mtd) {
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of_iounmap(&op->resource[0], up->map.virt, up->map.size);
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kfree(up);
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return -ENXIO;
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}
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up->mtd->owner = THIS_MODULE;
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mtd_device_register(up->mtd, NULL, 0);
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dev_set_drvdata(&op->dev, up);
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return 0;
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}
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static int uflash_probe(struct platform_device *op)
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{
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struct device_node *dp = op->dev.of_node;
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/* Flashprom must have the "user" property in order to
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* be used by this driver.
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*/
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if (!of_find_property(dp, "user", NULL))
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return -ENODEV;
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return uflash_devinit(op, dp);
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}
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static int uflash_remove(struct platform_device *op)
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{
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struct uflash_dev *up = dev_get_drvdata(&op->dev);
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if (up->mtd) {
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mtd_device_unregister(up->mtd);
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map_destroy(up->mtd);
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}
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if (up->map.virt) {
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of_iounmap(&op->resource[0], up->map.virt, up->map.size);
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up->map.virt = NULL;
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}
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kfree(up);
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return 0;
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}
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static const struct of_device_id uflash_match[] = {
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{
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.name = UFLASH_OBPNAME,
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, uflash_match);
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static struct platform_driver uflash_driver = {
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.driver = {
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.name = DRIVER_NAME,
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.of_match_table = uflash_match,
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},
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.probe = uflash_probe,
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.remove = uflash_remove,
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};
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module_platform_driver(uflash_driver);
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