1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mtd/mtd.h>
#include <linux/platform_device.h>
#include <linux/bcma/bcma.h>
#include "bcm47xxsflash.h"
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Serial flash driver for BCMA bus");
static const char *probes[] = { "bcm47xxpart", NULL };
static int bcm47xxsflash_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
struct bcm47xxsflash *b47s = mtd->priv;
/* Check address range */
if ((from + len) > mtd->size)
return -EINVAL;
memcpy_fromio(buf, (void __iomem *)KSEG0ADDR(b47s->window + from),
len);
*retlen = len;
return len;
}
static void bcm47xxsflash_fill_mtd(struct bcm47xxsflash *b47s)
{
struct mtd_info *mtd = &b47s->mtd;
mtd->priv = b47s;
mtd->name = "bcm47xxsflash";
mtd->owner = THIS_MODULE;
mtd->type = MTD_ROM;
mtd->size = b47s->size;
mtd->_read = bcm47xxsflash_read;
/* TODO: implement writing support and verify/change following code */
mtd->flags = MTD_CAP_ROM;
mtd->writebufsize = mtd->writesize = 1;
}
/**************************************************
* BCMA
**************************************************/
static int bcm47xxsflash_bcma_probe(struct platform_device *pdev)
{
struct bcma_sflash *sflash = dev_get_platdata(&pdev->dev);
struct bcm47xxsflash *b47s;
int err;
b47s = kzalloc(sizeof(*b47s), GFP_KERNEL);
if (!b47s) {
err = -ENOMEM;
goto out;
}
sflash->priv = b47s;
b47s->window = sflash->window;
b47s->blocksize = sflash->blocksize;
b47s->numblocks = sflash->numblocks;
b47s->size = sflash->size;
bcm47xxsflash_fill_mtd(b47s);
err = mtd_device_parse_register(&b47s->mtd, probes, NULL, NULL, 0);
if (err) {
pr_err("Failed to register MTD device: %d\n", err);
goto err_dev_reg;
}
return 0;
err_dev_reg:
kfree(&b47s->mtd);
out:
return err;
}
static int bcm47xxsflash_bcma_remove(struct platform_device *pdev)
{
struct bcma_sflash *sflash = dev_get_platdata(&pdev->dev);
struct bcm47xxsflash *b47s = sflash->priv;
mtd_device_unregister(&b47s->mtd);
kfree(b47s);
return 0;
}
static struct platform_driver bcma_sflash_driver = {
.probe = bcm47xxsflash_bcma_probe,
.remove = bcm47xxsflash_bcma_remove,
.driver = {
.name = "bcma_sflash",
.owner = THIS_MODULE,
},
};
/**************************************************
* Init
**************************************************/
static int __init bcm47xxsflash_init(void)
{
int err;
err = platform_driver_register(&bcma_sflash_driver);
if (err)
pr_err("Failed to register BCMA serial flash driver: %d\n",
err);
return err;
}
static void __exit bcm47xxsflash_exit(void)
{
platform_driver_unregister(&bcma_sflash_driver);
}
module_init(bcm47xxsflash_init);
module_exit(bcm47xxsflash_exit);
|
