mac80211: rebase ontop of v4.18.5

[openwrt/openwrt.git] / package / kernel / mac80211 / patches / ath / 440-ath5k_channel_bw_debugfs.patch

diff --git a/package/kernel/mac80211/patches/ath/440-ath5k_channel_bw_debugfs.patch b/package/kernel/mac80211/patches/ath/440-ath5k_channel_bw_debugfs.patch
new file mode 100644 (file)
index 0000000..20d67d2
--- /dev/null
+++ b/package/kernel/mac80211/patches/ath/440-ath5k_channel_bw_debugfs.patch
@@ -0,0 +1,148 @@
+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(-)
+
+Index: backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/debug.c
+===================================================================
+--- backports-v4.18-rc7.orig/drivers/net/wireless/ath/ath5k/debug.c
++++ backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/debug.c
+@@ -822,6 +822,97 @@ 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 */
+ 
+@@ -1016,6 +1107,8 @@ ath5k_debug_init_device(struct ath5k_hw
+       debugfs_create_file("queue", 0600, phydir, ah, &fops_queue);
+       debugfs_create_bool("32khz_clock", 0600, phydir,
+                           &ah->ah_use_32khz_clock);
++      debugfs_create_file("bwmode", S_IWUSR | S_IRUSR, phydir, ah,
++                          &fops_bwmode);
+ }
+ 
+ /* functions used in other places */
+Index: backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/ath5k.h
+===================================================================
+--- backports-v4.18-rc7.orig/drivers/net/wireless/ath/ath5k/ath5k.h
++++ backports-v4.18-rc7/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 */
+Index: backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/base.c
+===================================================================
+--- backports-v4.18-rc7.orig/drivers/net/wireless/ath/ath5k/base.c
++++ backports-v4.18-rc7/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