148 lines
4.4 KiB
Diff
148 lines
4.4 KiB
Diff
This adds a bwmode debugfs file which can be used to set alternate
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channel operating bandwidths. Only tested with AR5413 and only at
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5 and 20 mhz channels.
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Signed-off-by: Pat Erley <pat-lkml at erley.org>
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---
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Other devices will need to be added to the switch in write_file_bwmode
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drivers/net/wireless/ath/ath5k/debug.c | 86 ++++++++++++++++++++++++++++++++
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1 files changed, 86 insertions(+), 0 deletions(-)
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Index: backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/debug.c
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===================================================================
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--- backports-v4.18-rc7.orig/drivers/net/wireless/ath/ath5k/debug.c
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+++ backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/debug.c
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@@ -822,6 +822,97 @@ static const struct file_operations fops
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.llseek = default_llseek,
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};
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+/* debugfs: bwmode */
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+
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+static ssize_t read_file_bwmode(struct file *file, char __user *user_buf,
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+ size_t count, loff_t *ppos)
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+{
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+ struct ath5k_hw *ah = file->private_data;
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+ char buf[15];
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+ unsigned int len = 0;
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+
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+ int cur_ah_bwmode = ah->ah_bwmode_debug;
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+
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+#define print_selected(MODE, LABEL) \
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+ if (cur_ah_bwmode == MODE) \
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+ len += snprintf(buf+len, sizeof(buf)-len, "[%s]", LABEL); \
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+ else \
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+ len += snprintf(buf+len, sizeof(buf)-len, "%s", LABEL); \
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+ len += snprintf(buf+len, sizeof(buf)-len, " ");
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+
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+ print_selected(AR5K_BWMODE_5MHZ, "5");
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+ print_selected(AR5K_BWMODE_10MHZ, "10");
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+ print_selected(AR5K_BWMODE_DEFAULT, "20");
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+ print_selected(AR5K_BWMODE_40MHZ, "40");
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+#undef print_selected
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+
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+ len += snprintf(buf+len, sizeof(buf)-len, "\n");
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+
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+ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
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+}
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+
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+static ssize_t write_file_bwmode(struct file *file,
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+ const char __user *userbuf,
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+ size_t count, loff_t *ppos)
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+{
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+ struct ath5k_hw *ah = file->private_data;
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+ char buf[3];
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+ int bw = 20;
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+ int tobwmode = AR5K_BWMODE_DEFAULT;
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+
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+ if (copy_from_user(buf, userbuf, min(count, sizeof(buf))))
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+ return -EFAULT;
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+
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+ /* TODO: Add check for active interface */
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+
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+ if(strncmp(buf, "5", 1) == 0 ) {
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+ tobwmode = AR5K_BWMODE_5MHZ;
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+ bw = 5;
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+ } else if ( strncmp(buf, "10", 2) == 0 ) {
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+ tobwmode = AR5K_BWMODE_10MHZ;
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+ bw = 10;
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+ } else if ( strncmp(buf, "20", 2) == 0 ) {
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+ tobwmode = AR5K_BWMODE_DEFAULT;
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+ bw = 20;
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+ } else if ( strncmp(buf, "40", 2) == 0 ) {
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+ tobwmode = AR5K_BWMODE_40MHZ;
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+ bw = 40;
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+ } else
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+ return -EINVAL;
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+
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+ ATH5K_INFO(ah, "Changing to %imhz channel width[%i]\n",
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+ bw, tobwmode);
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+
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+ switch (ah->ah_radio) {
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+ /* TODO: only define radios that actually support 5/10mhz channels */
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+ case AR5K_RF5413:
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+ case AR5K_RF5110:
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+ case AR5K_RF5111:
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+ case AR5K_RF5112:
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+ case AR5K_RF2413:
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+ case AR5K_RF2316:
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+ case AR5K_RF2317:
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+ case AR5K_RF2425:
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+ if(ah->ah_bwmode_debug != tobwmode) {
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+ mutex_lock(&ah->lock);
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+ ah->ah_bwmode = tobwmode;
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+ ah->ah_bwmode_debug = tobwmode;
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+ mutex_unlock(&ah->lock);
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+ }
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+ break;
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+ default:
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+ return -EOPNOTSUPP;
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+ }
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+ return count;
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+}
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+
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+static const struct file_operations fops_bwmode = {
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+ .read = read_file_bwmode,
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+ .write = write_file_bwmode,
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+ .open = simple_open,
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+ .owner = THIS_MODULE,
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+ .llseek = default_llseek,
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+};
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/* debugfs: queues etc */
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@@ -1016,6 +1107,8 @@ ath5k_debug_init_device(struct ath5k_hw
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debugfs_create_file("queue", 0600, phydir, ah, &fops_queue);
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debugfs_create_bool("32khz_clock", 0600, phydir,
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&ah->ah_use_32khz_clock);
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+ debugfs_create_file("bwmode", S_IWUSR | S_IRUSR, phydir, ah,
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+ &fops_bwmode);
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}
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/* functions used in other places */
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Index: backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/ath5k.h
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===================================================================
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--- backports-v4.18-rc7.orig/drivers/net/wireless/ath/ath5k/ath5k.h
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+++ backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/ath5k.h
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@@ -1372,6 +1372,7 @@ struct ath5k_hw {
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u8 ah_coverage_class;
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bool ah_ack_bitrate_high;
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u8 ah_bwmode;
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+ u8 ah_bwmode_debug;
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bool ah_short_slot;
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/* Antenna Control */
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Index: backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/base.c
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===================================================================
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--- backports-v4.18-rc7.orig/drivers/net/wireless/ath/ath5k/base.c
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+++ backports-v4.18-rc7/drivers/net/wireless/ath/ath5k/base.c
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@@ -466,6 +466,9 @@ ath5k_chan_set(struct ath5k_hw *ah, stru
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return -EINVAL;
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}
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+ if (ah->ah_bwmode_debug != AR5K_BWMODE_DEFAULT)
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+ ah->ah_bwmode = ah->ah_bwmode_debug;
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+
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/*
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* To switch channels clear any pending DMA operations;
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* wait long enough for the RX fifo to drain, reset the
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