1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/fs.h>
21#include <linux/proc_fs.h>
22#include <linux/uaccess.h>
23
24#include "smd_private.h"
25
26static void *radio_log_base;
27static size_t radio_log_size;
28
29extern void *smem_item(unsigned id, unsigned *size);
30
31static ssize_t last_radio_log_read(struct file *file, char __user *buf,
32 size_t len, loff_t *offset)
33{
34 return simple_read_from_buffer(buf, len, offset,
35 radio_log_base, radio_log_size);
36}
37
38static struct file_operations last_radio_log_fops = {
39 .read = last_radio_log_read,
40 .llseek = default_llseek,
41};
42
43void msm_init_last_radio_log(struct module *owner)
44{
45 struct proc_dir_entry *entry;
46
47 if (last_radio_log_fops.owner) {
48 pr_err("%s: already claimed\n", __func__);
49 return;
50 }
51
52 radio_log_base = smem_item(SMEM_CLKREGIM_BSP, &radio_log_size);
53 if (!radio_log_base) {
54 pr_err("%s: could not retrieve SMEM_CLKREGIM_BSP\n", __func__);
55 return;
56 }
57
58 entry = proc_create("last_radio_log", S_IRUGO, NULL,
59 &last_radio_log_fops);
60 if (!entry) {
61 pr_err("%s: could not create proc entry for radio log\n",
62 __func__);
63 return;
64 }
65
66 pr_err("%s: last radio log is %d bytes long\n", __func__,
67 radio_log_size);
68 last_radio_log_fops.owner = owner;
69 proc_set_size(entry, radio_log_size);
70}
71EXPORT_SYMBOL(msm_init_last_radio_log);
72