From 1c3f730ddbf84c456a52fa8e0e5b8f9a73cd3409 Mon Sep 17 00:00:00 2001 From: Rishi Panjwani Date: Tue, 25 Oct 2011 17:26:29 -0700 Subject: [PATCH] ath6kl: Implement support for listen interval from userspace In order to allow user space based control of listen interval, we use available debugfs infrastructure. Listen interval implies how frequently we want the WLAN chip to wake up and synchronize the beacons in case it is in sleep mode. The command requires two parameters in the following order: 1) listen_interval_time 2) listen_interval_beacons The user has to write the listen interval_time (in msecs) and listen_interval_beacons (in no. of beacons) to the listen_interval file in ath6kl debug directory. Example: echo "30 1" > listen_interval Signed-off-by: Rishi Panjwani Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath6kl/debug.c | 64 +++++++++++++++++++++++++ 1 file changed, 64 insertions(+) diff --git a/drivers/net/wireless/ath/ath6kl/debug.c b/drivers/net/wireless/ath/ath6kl/debug.c index d537ccfe938e9..52149202ffb79 100644 --- a/drivers/net/wireless/ath/ath6kl/debug.c +++ b/drivers/net/wireless/ath/ath6kl/debug.c @@ -1503,6 +1503,70 @@ static const struct file_operations fops_bgscan_int = { .llseek = default_llseek, }; +static ssize_t ath6kl_listen_int_write(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath6kl *ar = file->private_data; + u16 listen_int_t, listen_int_b; + char buf[32]; + char *sptr, *token; + ssize_t len; + + len = min(count, sizeof(buf) - 1); + if (copy_from_user(buf, user_buf, len)) + return -EFAULT; + + buf[len] = '\0'; + sptr = buf; + + token = strsep(&sptr, " "); + if (!token) + return -EINVAL; + + if (kstrtou16(token, 0, &listen_int_t)) + return -EINVAL; + + if (kstrtou16(sptr, 0, &listen_int_b)) + return -EINVAL; + + if ((listen_int_t < 15) || (listen_int_t > 5000)) + return -EINVAL; + + if ((listen_int_b < 1) || (listen_int_b > 50)) + return -EINVAL; + + ar->listen_intvl_t = listen_int_t; + ar->listen_intvl_b = listen_int_b; + + ath6kl_wmi_listeninterval_cmd(ar->wmi, 0, ar->listen_intvl_t, + ar->listen_intvl_b); + + return count; +} + +static ssize_t ath6kl_listen_int_read(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath6kl *ar = file->private_data; + char buf[16]; + int len; + + len = snprintf(buf, sizeof(buf), "%u %u\n", ar->listen_intvl_t, + ar->listen_intvl_b); + + return simple_read_from_buffer(user_buf, count, ppos, buf, len); +} + +static const struct file_operations fops_listen_int = { + .read = ath6kl_listen_int_read, + .write = ath6kl_listen_int_write, + .open = ath6kl_debugfs_open, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + int ath6kl_debug_init(struct ath6kl *ar) { ar->debug.fwlog_buf.buf = vmalloc(ATH6KL_FWLOG_SIZE); -- 2.39.5