diff options
Diffstat (limited to 'package/kernel/mac80211/patches/440-ath5k_channel_bw_debugfs.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/440-ath5k_channel_bw_debugfs.patch | 143 |
1 files changed, 143 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 0000000..924b62e --- /dev/null +++ b/package/kernel/mac80211/patches/440-ath5k_channel_bw_debugfs.patch @@ -0,0 +1,143 @@ +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 +@@ -823,6 +823,97 @@ 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_debug; ++ ++#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_debug != tobwmode) { ++ mutex_lock(&ah->lock); ++ ah->ah_bwmode = tobwmode; ++ ah->ah_bwmode_debug = 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 */ + +@@ -1010,6 +1101,9 @@ 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, +--- a/drivers/net/wireless/ath/ath5k/ath5k.h ++++ b/drivers/net/wireless/ath/ath5k/ath5k.h +@@ -1372,6 +1372,7 @@ struct ath5k_hw { + u8 ah_coverage_class; + bool ah_ack_bitrate_high; + u8 ah_bwmode; ++ u8 ah_bwmode_debug; + bool ah_short_slot; + + /* Antenna Control */ +--- a/drivers/net/wireless/ath/ath5k/base.c ++++ b/drivers/net/wireless/ath/ath5k/base.c +@@ -466,6 +466,9 @@ ath5k_chan_set(struct ath5k_hw *ah, stru + return -EINVAL; + } + ++ if (ah->ah_bwmode_debug != AR5K_BWMODE_DEFAULT) ++ ah->ah_bwmode = ah->ah_bwmode_debug; ++ + /* + * To switch channels clear any pending DMA operations; + * wait long enough for the RX fifo to drain, reset the |