c2fc6b6947
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it was merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20230714174751.4060439-1-robh@kernel.org
158 lines
3.5 KiB
C
158 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/platform_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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return -ENOMEM;
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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_property_read_bool(dp, "user"))
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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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