AA: mac80211: backport package from trunk r39886
[openwrt/svn-archive/archive.git] / package / 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 @@ -821,6 +821,97 @@ 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_debug;
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:
82 + case AR5K_RF5110:
83 + case AR5K_RF5111:
84 + case AR5K_RF5112:
85 + case AR5K_RF2413:
86 + case AR5K_RF2316:
87 + case AR5K_RF2317:
88 + case AR5K_RF2425:
89 + if(ah->ah_bwmode_debug != tobwmode) {
90 + mutex_lock(&ah->lock);
91 + ah->ah_bwmode = tobwmode;
92 + ah->ah_bwmode_debug = tobwmode;
93 + mutex_unlock(&ah->lock);
94 + }
95 + break;
96 + default:
97 + return -EOPNOTSUPP;
98 + }
99 + return count;
100 +}
101 +
102 +static const struct file_operations fops_bwmode = {
103 + .read = read_file_bwmode,
104 + .write = write_file_bwmode,
105 + .open = simple_open,
106 + .owner = THIS_MODULE,
107 + .llseek = default_llseek,
108 +};
109
110 /* debugfs: queues etc */
111
112 @@ -914,6 +1005,9 @@ ath5k_debug_init_device(struct ath5k_hw
113 debugfs_create_file("beacon", S_IWUSR | S_IRUSR, phydir, ah,
114 &fops_beacon);
115
116 + debugfs_create_file("bwmode", S_IWUSR | S_IRUSR, phydir, ah,
117 + &fops_bwmode);
118 +
119 debugfs_create_file("reset", S_IWUSR, phydir, ah, &fops_reset);
120
121 debugfs_create_file("antenna", S_IWUSR | S_IRUSR, phydir, ah,
122 --- a/drivers/net/wireless/ath/ath5k/ath5k.h
123 +++ b/drivers/net/wireless/ath/ath5k/ath5k.h
124 @@ -1369,6 +1369,7 @@ struct ath5k_hw {
125 u8 ah_coverage_class;
126 bool ah_ack_bitrate_high;
127 u8 ah_bwmode;
128 + u8 ah_bwmode_debug;
129 bool ah_short_slot;
130
131 /* Antenna Control */
132 --- a/drivers/net/wireless/ath/ath5k/base.c
133 +++ b/drivers/net/wireless/ath/ath5k/base.c
134 @@ -466,6 +466,9 @@ ath5k_chan_set(struct ath5k_hw *ah, stru
135 return -EINVAL;
136 }
137
138 + if (ah->ah_bwmode_debug != AR5K_BWMODE_DEFAULT)
139 + ah->ah_bwmode = ah->ah_bwmode_debug;
140 +
141 /*
142 * To switch channels clear any pending DMA operations;
143 * wait long enough for the RX fifo to drain, reset the