ath9k: add some cleanups and minor fixes
[openwrt/svn-archive/archive.git] / package / kernel / mac80211 / patches / 440-ath5k_channel_bw_debugfs.patch
1 This adds a bwmode debugfs file which can be used to set alternate
2 channel operating bandwidths. Only tested with AR5413 and only at
3 5 and 20 mhz channels.
4
5 Signed-off-by: Pat Erley <pat-lkml at erley.org>
6 ---
7 Other devices will need to be added to the switch in write_file_bwmode
8
9 drivers/net/wireless/ath/ath5k/debug.c | 86 ++++++++++++++++++++++++++++++++
10 1 files changed, 86 insertions(+), 0 deletions(-)
11
12 --- a/drivers/net/wireless/ath/ath5k/debug.c
13 +++ b/drivers/net/wireless/ath/ath5k/debug.c
14 @@ -811,6 +811,89 @@ static const struct file_operations fops
15 .llseek = default_llseek,
16 };
17
18 +/* debugfs: bwmode */
19 +
20 +static ssize_t read_file_bwmode(struct file *file, char __user *user_buf,
21 + size_t count, loff_t *ppos)
22 +{
23 + struct ath5k_hw *ah = file->private_data;
24 + char buf[15];
25 + unsigned int len = 0;
26 +
27 + int cur_ah_bwmode = ah->ah_bwmode;
28 +
29 +#define print_selected(MODE, LABEL) \
30 + if (cur_ah_bwmode == MODE) \
31 + len += snprintf(buf+len, sizeof(buf)-len, "[%s]", LABEL); \
32 + else \
33 + len += snprintf(buf+len, sizeof(buf)-len, "%s", LABEL); \
34 + len += snprintf(buf+len, sizeof(buf)-len, " ");
35 +
36 + print_selected(AR5K_BWMODE_5MHZ, "5");
37 + print_selected(AR5K_BWMODE_10MHZ, "10");
38 + print_selected(AR5K_BWMODE_DEFAULT, "20");
39 + print_selected(AR5K_BWMODE_40MHZ, "40");
40 +#undef print_selected
41 +
42 + len += snprintf(buf+len, sizeof(buf)-len, "\n");
43 +
44 + return simple_read_from_buffer(user_buf, count, ppos, buf, len);
45 +}
46 +
47 +static ssize_t write_file_bwmode(struct file *file,
48 + const char __user *userbuf,
49 + size_t count, loff_t *ppos)
50 +{
51 + struct ath5k_hw *ah = file->private_data;
52 + char buf[3];
53 + int bw = 20;
54 + int tobwmode = AR5K_BWMODE_DEFAULT;
55 +
56 + if (copy_from_user(buf, userbuf, min(count, sizeof(buf))))
57 + return -EFAULT;
58 +
59 + /* TODO: Add check for active interface */
60 +
61 + if(strncmp(buf, "5", 1) == 0 ) {
62 + tobwmode = AR5K_BWMODE_5MHZ;
63 + bw = 5;
64 + } else if ( strncmp(buf, "10", 2) == 0 ) {
65 + tobwmode = AR5K_BWMODE_10MHZ;
66 + bw = 10;
67 + } else if ( strncmp(buf, "20", 2) == 0 ) {
68 + tobwmode = AR5K_BWMODE_DEFAULT;
69 + bw = 20;
70 + } else if ( strncmp(buf, "40", 2) == 0 ) {
71 + tobwmode = AR5K_BWMODE_40MHZ;
72 + bw = 40;
73 + } else
74 + return -EINVAL;
75 +
76 + ATH5K_INFO(ah, "Changing to %imhz channel width[%i]\n",
77 + bw, tobwmode);
78 +
79 + switch (ah->ah_radio) {
80 + /* TODO: only define radios that actually support 5/10mhz channels */
81 + case AR5K_RF5413: case AR5K_RF5110: case AR5K_RF5111: case AR5K_RF5112: case AR5K_RF2413: case AR5K_RF2316: case AR5K_RF2317: case AR5K_RF2425:
82 + if(ah->ah_bwmode != tobwmode) {
83 + mutex_lock(&ah->lock);
84 + ah->ah_bwmode = tobwmode;
85 + mutex_unlock(&ah->lock);
86 + }
87 + break;
88 + default:
89 + return -EOPNOTSUPP;
90 + }
91 + return count;
92 +}
93 +
94 +static const struct file_operations fops_bwmode = {
95 + .read = read_file_bwmode,
96 + .write = write_file_bwmode,
97 + .open = simple_open,
98 + .owner = THIS_MODULE,
99 + .llseek = default_llseek,
100 +};
101
102 /* debugfs: queues etc */
103
104 @@ -902,6 +985,9 @@ ath5k_debug_init_device(struct ath5k_hw
105 debugfs_create_file("beacon", S_IWUSR | S_IRUSR, phydir, ah,
106 &fops_beacon);
107
108 + debugfs_create_file("bwmode", S_IWUSR | S_IRUSR, phydir, ah,
109 + &fops_bwmode);
110 +
111 debugfs_create_file("reset", S_IWUSR, phydir, ah, &fops_reset);
112
113 debugfs_create_file("antenna", S_IWUSR | S_IRUSR, phydir, ah,