ath6kl: Implement support for power parameter control from userspace
authorRishi Panjwani <rpanjwan@qca.qualcomm.com>
Wed, 26 Oct 2011 02:52:41 +0000 (19:52 -0700)
committerKalle Valo <kvalo@qca.qualcomm.com>
Fri, 11 Nov 2011 10:58:55 +0000 (12:58 +0200)
In order to allow user space based control of power parameters, we use
available debugfs infrastructure. With these features user can control
power consumption by adjusting various sleep/wake up related parameters.
The feature has been added for testing purposes. All 5 parameters are
mandatory in correct order. They have to be written to the power_params
file. These are:

1) idle_period
2) no_of_pspoll
3) dtim_policy
4) tx_wakeup_policy
5) no_tx_to_wakeup

Example:

echo "200 1 0 1 1" > power_params

Signed-off-by: Rishi Panjwani <rpanjwan@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
drivers/net/wireless/ath/ath6kl/debug.c

index 52149202ffb79397eebdd6ccbe9d968cd2bd6247..70ea137cc8170448a75b5011d90a5ea519987e99 100644 (file)
@@ -1567,6 +1567,66 @@ static const struct file_operations fops_listen_int = {
        .llseek = default_llseek,
 };
 
+static ssize_t ath6kl_power_params_write(struct file *file,
+                                               const char __user *user_buf,
+                                               size_t count, loff_t *ppos)
+{
+       struct ath6kl *ar = file->private_data;
+       u8 buf[100];
+       unsigned int len = 0;
+       char *sptr, *token;
+       u16 idle_period, ps_poll_num, dtim,
+               tx_wakeup, num_tx;
+
+       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, &idle_period))
+               return -EINVAL;
+
+       token = strsep(&sptr, " ");
+       if (!token)
+               return -EINVAL;
+       if (kstrtou16(token, 0, &ps_poll_num))
+               return -EINVAL;
+
+       token = strsep(&sptr, " ");
+       if (!token)
+               return -EINVAL;
+       if (kstrtou16(token, 0, &dtim))
+               return -EINVAL;
+
+       token = strsep(&sptr, " ");
+       if (!token)
+               return -EINVAL;
+       if (kstrtou16(token, 0, &tx_wakeup))
+               return -EINVAL;
+
+       token = strsep(&sptr, " ");
+       if (!token)
+               return -EINVAL;
+       if (kstrtou16(token, 0, &num_tx))
+               return -EINVAL;
+
+       ath6kl_wmi_pmparams_cmd(ar->wmi, 0, idle_period, ps_poll_num,
+                               dtim, tx_wakeup, num_tx, 0);
+
+       return count;
+}
+
+static const struct file_operations fops_power_params = {
+       .write = ath6kl_power_params_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);
@@ -1649,6 +1709,9 @@ int ath6kl_debug_init(struct ath6kl *ar)
        debugfs_create_file("bgscan_interval", S_IWUSR,
                                ar->debugfs_phy, ar, &fops_bgscan_int);
 
+       debugfs_create_file("power_params", S_IWUSR, ar->debugfs_phy, ar,
+                                               &fops_power_params);
+
        return 0;
 }