hyperv: Remove recv_pkt_list and lock
[linux/fpc-iii.git] / drivers / mtd / maps / sun_uflash.c
blobb6f1aac3510cb58a720cb529302126ab9596b3fb
1 /* sun_uflash.c - Driver for user-programmable flash on
2 * Sun Microsystems SME boardsets.
4 * This driver does NOT provide access to the OBP-flash for
5 * safety reasons-- use <linux>/drivers/sbus/char/flash.c instead.
7 * Copyright (c) 2001 Eric Brower (ebrower@usa.net)
8 */
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/fs.h>
13 #include <linux/errno.h>
14 #include <linux/ioport.h>
15 #include <linux/of.h>
16 #include <linux/of_device.h>
17 #include <linux/slab.h>
18 #include <asm/prom.h>
19 #include <asm/uaccess.h>
20 #include <asm/io.h>
22 #include <linux/mtd/mtd.h>
23 #include <linux/mtd/map.h>
25 #define UFLASH_OBPNAME "flashprom"
26 #define DRIVER_NAME "sun_uflash"
27 #define PFX DRIVER_NAME ": "
29 #define UFLASH_WINDOW_SIZE 0x200000
30 #define UFLASH_BUSWIDTH 1 /* EBus is 8-bit */
32 MODULE_AUTHOR("Eric Brower <ebrower@usa.net>");
33 MODULE_DESCRIPTION("User-programmable flash device on Sun Microsystems boardsets");
34 MODULE_SUPPORTED_DEVICE(DRIVER_NAME);
35 MODULE_LICENSE("GPL");
36 MODULE_VERSION("2.1");
38 struct uflash_dev {
39 const char *name; /* device name */
40 struct map_info map; /* mtd map info */
41 struct mtd_info *mtd; /* mtd info */
44 struct map_info uflash_map_templ = {
45 .name = "SUNW,???-????",
46 .size = UFLASH_WINDOW_SIZE,
47 .bankwidth = UFLASH_BUSWIDTH,
50 int uflash_devinit(struct platform_device *op, struct device_node *dp)
52 struct uflash_dev *up;
54 if (op->resource[1].flags) {
55 /* Non-CFI userflash device-- once I find one we
56 * can work on supporting it.
58 printk(KERN_ERR PFX "Unsupported device at %s, 0x%llx\n",
59 dp->full_name, (unsigned long long)op->resource[0].start);
61 return -ENODEV;
64 up = kzalloc(sizeof(struct uflash_dev), GFP_KERNEL);
65 if (!up) {
66 printk(KERN_ERR PFX "Cannot allocate struct uflash_dev\n");
67 return -ENOMEM;
70 /* copy defaults and tweak parameters */
71 memcpy(&up->map, &uflash_map_templ, sizeof(uflash_map_templ));
73 up->map.size = resource_size(&op->resource[0]);
75 up->name = of_get_property(dp, "model", NULL);
76 if (up->name && 0 < strlen(up->name))
77 up->map.name = up->name;
79 up->map.phys = op->resource[0].start;
81 up->map.virt = of_ioremap(&op->resource[0], 0, up->map.size,
82 DRIVER_NAME);
83 if (!up->map.virt) {
84 printk(KERN_ERR PFX "Failed to map device.\n");
85 kfree(up);
87 return -EINVAL;
90 simple_map_init(&up->map);
92 /* MTD registration */
93 up->mtd = do_map_probe("cfi_probe", &up->map);
94 if (!up->mtd) {
95 of_iounmap(&op->resource[0], up->map.virt, up->map.size);
96 kfree(up);
98 return -ENXIO;
101 up->mtd->owner = THIS_MODULE;
103 mtd_device_register(up->mtd, NULL, 0);
105 dev_set_drvdata(&op->dev, up);
107 return 0;
110 static int uflash_probe(struct platform_device *op)
112 struct device_node *dp = op->dev.of_node;
114 /* Flashprom must have the "user" property in order to
115 * be used by this driver.
117 if (!of_find_property(dp, "user", NULL))
118 return -ENODEV;
120 return uflash_devinit(op, dp);
123 static int uflash_remove(struct platform_device *op)
125 struct uflash_dev *up = dev_get_drvdata(&op->dev);
127 if (up->mtd) {
128 mtd_device_unregister(up->mtd);
129 map_destroy(up->mtd);
131 if (up->map.virt) {
132 of_iounmap(&op->resource[0], up->map.virt, up->map.size);
133 up->map.virt = NULL;
136 kfree(up);
138 return 0;
141 static const struct of_device_id uflash_match[] = {
143 .name = UFLASH_OBPNAME,
148 MODULE_DEVICE_TABLE(of, uflash_match);
150 static struct platform_driver uflash_driver = {
151 .driver = {
152 .name = DRIVER_NAME,
153 .owner = THIS_MODULE,
154 .of_match_table = uflash_match,
156 .probe = uflash_probe,
157 .remove = uflash_remove,
160 module_platform_driver(uflash_driver);