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path: root/drivers/mtd/maps/sun_uflash.c
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Diffstat (limited to 'drivers/mtd/maps/sun_uflash.c')
-rw-r--r--drivers/mtd/maps/sun_uflash.c213
1 files changed, 99 insertions, 114 deletions
diff --git a/drivers/mtd/maps/sun_uflash.c b/drivers/mtd/maps/sun_uflash.c
index 0758cb1d010..b6f1aac3510 100644
--- a/drivers/mtd/maps/sun_uflash.c
+++ b/drivers/mtd/maps/sun_uflash.c
@@ -1,23 +1,21 @@
-/* $Id: sun_uflash.c,v 1.13 2005/11/07 11:14:28 gleixner Exp $
- *
- * 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>
#include <linux/module.h>
#include <linux/fs.h>
#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 <linux/slab.h>
+#include <asm/prom.h>
#include <asm/uaccess.h>
#include <asm/io.h>
@@ -25,151 +23,138 @@
#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_LICENSE
- ("GPL");
+MODULE_AUTHOR("Eric Brower <ebrower@usa.net>");
+MODULE_DESCRIPTION("User-programmable flash device on Sun Microsystems boardsets");
+MODULE_SUPPORTED_DEVICE(DRIVER_NAME);
+MODULE_LICENSE("GPL");
+MODULE_VERSION("2.1");
-static LIST_HEAD(device_list);
struct uflash_dev {
- char * name; /* device name */
+ const char *name; /* device name */
struct map_info map; /* mtd map info */
- struct mtd_info * mtd; /* mtd info */
- struct list_head list;
+ struct mtd_info *mtd; /* mtd info */
};
-
struct map_info uflash_map_templ = {
- .name = "SUNW,???-????",
- .size = UFLASH_WINDOW_SIZE,
- .bankwidth = UFLASH_BUSWIDTH,
+ .name = "SUNW,???-????",
+ .size = UFLASH_WINDOW_SIZE,
+ .bankwidth = UFLASH_BUSWIDTH,
};
-int uflash_devinit(struct linux_ebus_device* edev)
+int uflash_devinit(struct platform_device *op, struct device_node *dp)
{
- int iTmp, nregs;
- struct linux_prom_registers regs[2];
- struct uflash_dev *pdev;
-
- iTmp = prom_getproperty(
- edev->prom_node, "reg", (void *)regs, sizeof(regs));
- if ((iTmp % sizeof(regs[0])) != 0) {
- printk("%s: Strange reg property size %d\n",
- UFLASH_DEVNAME, iTmp);
- return -ENODEV;
- }
-
- nregs = iTmp / sizeof(regs[0]);
+ struct uflash_dev *up;
- if (nregs != 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%lx (%d regs): " \
- "email ebrower@usa.net\n",
- UFLASH_DEVNAME, edev->resource[0].start, nregs);
+ printk(KERN_ERR PFX "Unsupported device at %s, 0x%llx\n",
+ dp->full_name, (unsigned long long)op->resource[0].start);
+
return -ENODEV;
}
- if(0 == (pdev = kmalloc(sizeof(struct uflash_dev), GFP_KERNEL))) {
- printk("%s: unable to kmalloc new device\n", UFLASH_DEVNAME);
- return(-ENOMEM);
+ up = kzalloc(sizeof(struct uflash_dev), GFP_KERNEL);
+ if (!up) {
+ printk(KERN_ERR PFX "Cannot allocate struct uflash_dev\n");
+ return -ENOMEM;
}
/* copy defaults and tweak parameters */
- memcpy(&pdev->map, &uflash_map_templ, sizeof(uflash_map_templ));
- pdev->map.size = regs[0].reg_size;
-
- iTmp = prom_getproplen(edev->prom_node, "model");
- pdev->name = kmalloc(iTmp, GFP_KERNEL);
- prom_getstring(edev->prom_node, "model", pdev->name, iTmp);
- if(0 != pdev->name && 0 < strlen(pdev->name)) {
- pdev->map.name = pdev->name;
- }
- pdev->map.phys = edev->resource[0].start;
- pdev->map.virt = ioremap_nocache(edev->resource[0].start, pdev->map.size);
- if(0 == pdev->map.virt) {
- printk("%s: failed to map device\n", __FUNCTION__);
- kfree(pdev->name);
- kfree(pdev);
- return(-1);
+ memcpy(&up->map, &uflash_map_templ, sizeof(uflash_map_templ));
+
+ 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 = up->name;
+
+ up->map.phys = op->resource[0].start;
+
+ up->map.virt = of_ioremap(&op->resource[0], 0, up->map.size,
+ DRIVER_NAME);
+ if (!up->map.virt) {
+ printk(KERN_ERR PFX "Failed to map device.\n");
+ kfree(up);
+
+ return -EINVAL;
}
- simple_map_init(&pdev->map);
+ simple_map_init(&up->map);
/* MTD registration */
- pdev->mtd = do_map_probe("cfi_probe", &pdev->map);
- if(0 == pdev->mtd) {
- iounmap(pdev->map.virt);
- kfree(pdev->name);
- kfree(pdev);
- return(-ENXIO);
+ up->mtd = do_map_probe("cfi_probe", &up->map);
+ if (!up->mtd) {
+ of_iounmap(&op->resource[0], up->map.virt, up->map.size);
+ kfree(up);
+
+ return -ENXIO;
}
- list_add(&pdev->list, &device_list);
+ up->mtd->owner = THIS_MODULE;
- pdev->mtd->owner = THIS_MODULE;
+ mtd_device_register(up->mtd, NULL, 0);
- add_mtd_device(pdev->mtd);
- return(0);
+ dev_set_drvdata(&op->dev, up);
+
+ return 0;
}
-static int __init uflash_init(void)
+static int uflash_probe(struct platform_device *op)
{
- struct linux_ebus *ebus = NULL;
- struct linux_ebus_device *edev = NULL;
-
- for_each_ebus(ebus) {
- for_each_ebusdev(edev, ebus) {
- if (!strcmp(edev->prom_name, UFLASH_OBPNAME)) {
- if(0 > prom_getproplen(edev->prom_node, "user")) {
- DEBUG(2, "%s: ignoring device at 0x%lx\n",
- UFLASH_DEVNAME, edev->resource[0].start);
- } else {
- uflash_devinit(edev);
- }
- }
- }
- }
+ struct device_node *dp = op->dev.of_node;
- if(list_empty(&device_list)) {
- printk("%s: unable to locate device\n", UFLASH_DEVNAME);
+ /* Flashprom must have the "user" property in order to
+ * be used by this driver.
+ */
+ if (!of_find_property(dp, "user", NULL))
return -ENODEV;
- }
- return(0);
+
+ return uflash_devinit(op, dp);
}
-static void __exit uflash_cleanup(void)
+static int uflash_remove(struct platform_device *op)
{
- struct list_head *udevlist;
- struct uflash_dev *udev;
-
- list_for_each(udevlist, &device_list) {
- udev = list_entry(udevlist, struct uflash_dev, list);
- DEBUG(2, "%s: removing device %s\n",
- UFLASH_DEVNAME, udev->name);
-
- if(0 != udev->mtd) {
- del_mtd_device(udev->mtd);
- map_destroy(udev->mtd);
- }
- if(0 != udev->map.virt) {
- iounmap(udev->map.virt);
- udev->map.virt = NULL;
- }
- kfree(udev->name);
- kfree(udev);
+ struct uflash_dev *up = dev_get_drvdata(&op->dev);
+
+ if (up->mtd) {
+ mtd_device_unregister(up->mtd);
+ map_destroy(up->mtd);
+ }
+ if (up->map.virt) {
+ of_iounmap(&op->resource[0], up->map.virt, up->map.size);
+ up->map.virt = NULL;
}
+
+ kfree(up);
+
+ return 0;
}
-module_init(uflash_init);
-module_exit(uflash_cleanup);
+static const struct of_device_id uflash_match[] = {
+ {
+ .name = UFLASH_OBPNAME,
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, uflash_match);
+
+static struct platform_driver uflash_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = uflash_match,
+ },
+ .probe = uflash_probe,
+ .remove = uflash_remove,
+};
+
+module_platform_driver(uflash_driver);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 17:28:33 +0000