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-rw-r--r--package/kernel/mac80211/patches/440-ath5k_channel_bw_debugfs.patch113
1 files changed, 113 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/440-ath5k_channel_bw_debugfs.patch b/package/kernel/mac80211/patches/440-ath5k_channel_bw_debugfs.patch
new file mode 100644
index 0000000000..01c28bcca2
--- /dev/null
+++ b/package/kernel/mac80211/patches/440-ath5k_channel_bw_debugfs.patch
@@ -0,0 +1,113 @@
+This adds a bwmode debugfs file which can be used to set alternate
+channel operating bandwidths. Only tested with AR5413 and only at
+5 and 20 mhz channels.
+
+Signed-off-by: Pat Erley <pat-lkml at erley.org>
+---
+Other devices will need to be added to the switch in write_file_bwmode
+
+drivers/net/wireless/ath/ath5k/debug.c | 86 ++++++++++++++++++++++++++++++++
+ 1 files changed, 86 insertions(+), 0 deletions(-)
+
+--- a/drivers/net/wireless/ath/ath5k/debug.c
++++ b/drivers/net/wireless/ath/ath5k/debug.c
+@@ -811,6 +811,89 @@ static const struct file_operations fops
+ .llseek = default_llseek,
+ };
+
++/* debugfs: bwmode */
++
++static ssize_t read_file_bwmode(struct file *file, char __user *user_buf,
++ size_t count, loff_t *ppos)
++{
++ struct ath5k_hw *ah = file->private_data;
++ char buf[15];
++ unsigned int len = 0;
++
++ int cur_ah_bwmode = ah->ah_bwmode;
++
++#define print_selected(MODE, LABEL) \
++ if (cur_ah_bwmode == MODE) \
++ len += snprintf(buf+len, sizeof(buf)-len, "[%s]", LABEL); \
++ else \
++ len += snprintf(buf+len, sizeof(buf)-len, "%s", LABEL); \
++ len += snprintf(buf+len, sizeof(buf)-len, " ");
++
++ print_selected(AR5K_BWMODE_5MHZ, "5");
++ print_selected(AR5K_BWMODE_10MHZ, "10");
++ print_selected(AR5K_BWMODE_DEFAULT, "20");
++ print_selected(AR5K_BWMODE_40MHZ, "40");
++#undef print_selected
++
++ len += snprintf(buf+len, sizeof(buf)-len, "\n");
++
++ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
++}
++
++static ssize_t write_file_bwmode(struct file *file,
++ const char __user *userbuf,
++ size_t count, loff_t *ppos)
++{
++ struct ath5k_hw *ah = file->private_data;
++ char buf[3];
++ int bw = 20;
++ int tobwmode = AR5K_BWMODE_DEFAULT;
++
++ if (copy_from_user(buf, userbuf, min(count, sizeof(buf))))
++ return -EFAULT;
++
++ /* TODO: Add check for active interface */
++
++ if(strncmp(buf, "5", 1) == 0 ) {
++ tobwmode = AR5K_BWMODE_5MHZ;
++ bw = 5;
++ } else if ( strncmp(buf, "10", 2) == 0 ) {
++ tobwmode = AR5K_BWMODE_10MHZ;
++ bw = 10;
++ } else if ( strncmp(buf, "20", 2) == 0 ) {
++ tobwmode = AR5K_BWMODE_DEFAULT;
++ bw = 20;
++ } else if ( strncmp(buf, "40", 2) == 0 ) {
++ tobwmode = AR5K_BWMODE_40MHZ;
++ bw = 40;
++ } else
++ return -EINVAL;
++
++ ATH5K_INFO(ah, "Changing to %imhz channel width[%i]\n",
++ bw, tobwmode);
++
++ switch (ah->ah_radio) {
++ /* TODO: only define radios that actually support 5/10mhz channels */
++ case AR5K_RF5413: case AR5K_RF5110: case AR5K_RF5111: case AR5K_RF5112: case AR5K_RF2413: case AR5K_RF2316: case AR5K_RF2317: case AR5K_RF2425:
++ if(ah->ah_bwmode != tobwmode) {
++ mutex_lock(&ah->lock);
++ ah->ah_bwmode = tobwmode;
++ mutex_unlock(&ah->lock);
++ }
++ break;
++ default:
++ return -EOPNOTSUPP;
++ }
++ return count;
++}
++
++static const struct file_operations fops_bwmode = {
++ .read = read_file_bwmode,
++ .write = write_file_bwmode,
++ .open = simple_open,
++ .owner = THIS_MODULE,
++ .llseek = default_llseek,
++};
+
+ /* debugfs: queues etc */
+
+@@ -902,6 +985,9 @@ ath5k_debug_init_device(struct ath5k_hw
+ debugfs_create_file("beacon", S_IWUSR | S_IRUSR, phydir, ah,
+ &fops_beacon);
+
++ debugfs_create_file("bwmode", S_IWUSR | S_IRUSR, phydir, ah,
++ &fops_bwmode);
++
+ debugfs_create_file("reset", S_IWUSR, phydir, ah, &fops_reset);
+
+ debugfs_create_file("antenna", S_IWUSR | S_IRUSR, phydir, ah,