-/* $Id: flash.c,v 1.25 2001/12/21 04:56:16 davem Exp $
- * flash.c: Allow mmap access to the OBP Flash, for OBP updates.
+/* flash.c: Allow mmap access to the OBP Flash, for OBP updates.
*
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/miscdevice.h>
-#include <linux/slab.h>
#include <linux/fcntl.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
-#include <asm/sbus.h>
-#include <asm/ebus.h>
#include <asm/upa.h>
static DEFINE_SPINLOCK(flash_lock);
static int
flash_open(struct inode *inode, struct file *file)
{
- if (test_and_set_bit(0, (void *)&flash.busy) != 0)
+ lock_kernel();
+ if (test_and_set_bit(0, (void *)&flash.busy) != 0) {
+ unlock_kernel();
return -EBUSY;
+ }
+ unlock_kernel();
return 0;
}
return 0;
}
-static struct file_operations flash_fops = {
+static const struct file_operations flash_fops = {
/* no write to the Flash, use mmap
* and play flash dependent tricks.
*/
static struct miscdevice flash_dev = { FLASH_MINOR, "flash", &flash_fops };
-static int __init flash_init(void)
+static int __devinit flash_probe(struct of_device *op,
+ const struct of_device_id *match)
{
- struct sbus_bus *sbus;
- struct sbus_dev *sdev = NULL;
-#ifdef CONFIG_PCI
- struct linux_ebus *ebus;
- struct linux_ebus_device *edev = NULL;
- struct linux_prom_registers regs[2];
- int len, nregs;
-#endif
- int err;
-
- for_all_sbusdev(sdev, sbus) {
- if (!strcmp(sdev->prom_name, "flashprom")) {
- if (sdev->reg_addrs[0].phys_addr == sdev->reg_addrs[1].phys_addr) {
- flash.read_base = ((unsigned long)sdev->reg_addrs[0].phys_addr) |
- (((unsigned long)sdev->reg_addrs[0].which_io)<<32UL);
- flash.read_size = sdev->reg_addrs[0].reg_size;
- flash.write_base = flash.read_base;
- flash.write_size = flash.read_size;
- } else {
- flash.read_base = ((unsigned long)sdev->reg_addrs[0].phys_addr) |
- (((unsigned long)sdev->reg_addrs[0].which_io)<<32UL);
- flash.read_size = sdev->reg_addrs[0].reg_size;
- flash.write_base = ((unsigned long)sdev->reg_addrs[1].phys_addr) |
- (((unsigned long)sdev->reg_addrs[1].which_io)<<32UL);
- flash.write_size = sdev->reg_addrs[1].reg_size;
- }
- flash.busy = 0;
- break;
- }
- }
- if (!sdev) {
-#ifdef CONFIG_PCI
- struct linux_prom_registers *ebus_regs;
-
- for_each_ebus(ebus) {
- for_each_ebusdev(edev, ebus) {
- if (!strcmp(edev->prom_node->name, "flashprom"))
- goto ebus_done;
- }
- }
- ebus_done:
- if (!edev)
- return -ENODEV;
-
- ebus_regs = of_get_property(edev->prom_node, "reg", &len);
- if (!ebus_regs || (len % sizeof(regs[0])) != 0) {
- printk("flash: Strange reg property size %d\n", len);
- return -ENODEV;
- }
-
- nregs = len / sizeof(ebus_regs[0]);
-
- flash.read_base = edev->resource[0].start;
- flash.read_size = ebus_regs[0].reg_size;
-
- if (nregs == 1) {
- flash.write_base = edev->resource[0].start;
- flash.write_size = ebus_regs[0].reg_size;
- } else if (nregs == 2) {
- flash.write_base = edev->resource[1].start;
- flash.write_size = ebus_regs[1].reg_size;
- } else {
- printk("flash: Strange number of regs %d\n", nregs);
- return -ENODEV;
- }
+ struct device_node *dp = op->dev.of_node;
+ struct device_node *parent;
- flash.busy = 0;
+ parent = dp->parent;
-#else
+ if (strcmp(parent->name, "sbus") &&
+ strcmp(parent->name, "sbi") &&
+ strcmp(parent->name, "ebus"))
return -ENODEV;
-#endif
+
+ flash.read_base = op->resource[0].start;
+ flash.read_size = resource_size(&op->resource[0]);
+ if (op->resource[1].flags) {
+ flash.write_base = op->resource[1].start;
+ flash.write_size = resource_size(&op->resource[1]);
+ } else {
+ flash.write_base = op->resource[0].start;
+ flash.write_size = resource_size(&op->resource[0]);
}
+ flash.busy = 0;
- printk("OBP Flash: RD %lx[%lx] WR %lx[%lx]\n",
+ printk(KERN_INFO "%s: OBP Flash, RD %lx[%lx] WR %lx[%lx]\n",
+ op->dev.of_node->full_name,
flash.read_base, flash.read_size,
flash.write_base, flash.write_size);
- err = misc_register(&flash_dev);
- if (err) {
- printk(KERN_ERR "flash: unable to get misc minor\n");
- return err;
- }
+ return misc_register(&flash_dev);
+}
+
+static int __devexit flash_remove(struct of_device *op)
+{
+ misc_deregister(&flash_dev);
return 0;
}
+static const struct of_device_id flash_match[] = {
+ {
+ .name = "flashprom",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, flash_match);
+
+static struct of_platform_driver flash_driver = {
+ .name = "flash",
+ .match_table = flash_match,
+ .probe = flash_probe,
+ .remove = __devexit_p(flash_remove),
+};
+
+static int __init flash_init(void)
+{
+ return of_register_driver(&flash_driver, &of_bus_type);
+}
+
static void __exit flash_cleanup(void)
{
- misc_deregister(&flash_dev);
+ of_unregister_driver(&flash_driver);
}
module_init(flash_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff