From a24fc7c35324618ce5fe9c54baa4bc9a3881cc86 Mon Sep 17 00:00:00 2001 From: Rishi Panjwani Date: Tue, 25 Oct 2011 19:52:41 -0700 Subject: [PATCH] ath6kl: Implement support for power parameter control from userspace 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 Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath6kl/debug.c | 63 +++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) diff --git a/drivers/net/wireless/ath/ath6kl/debug.c b/drivers/net/wireless/ath/ath6kl/debug.c index 5214920..70ea137 100644 --- a/drivers/net/wireless/ath/ath6kl/debug.c +++ b/drivers/net/wireless/ath/ath6kl/debug.c @@ -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; } -- 2.7.4