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/*
* This file is part of wlcore
*
* Copyright (C) 2013 Texas Instruments Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include "wlcore.h"
#include "debug.h"
#include "ps.h"
#include "sysfs.h"
static ssize_t wl1271_sysfs_show_bt_coex_state(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct wl1271 *wl = dev_get_drvdata(dev);
ssize_t len;
len = PAGE_SIZE;
mutex_lock(&wl->mutex);
len = snprintf(buf, len, "%d\n\n0 - off\n1 - on\n",
wl->sg_enabled);
mutex_unlock(&wl->mutex);
return len;
}
static ssize_t wl1271_sysfs_store_bt_coex_state(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct wl1271 *wl = dev_get_drvdata(dev);
unsigned long res;
int ret;
ret = kstrtoul(buf, 10, &res);
if (ret < 0) {
wl1271_warning("incorrect value written to bt_coex_mode");
return count;
}
mutex_lock(&wl->mutex);
res = !!res;
if (res == wl->sg_enabled)
goto out;
wl->sg_enabled = res;
if (unlikely(wl->state != WLCORE_STATE_ON))
goto out;
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
wl1271_acx_sg_enable(wl, wl->sg_enabled);
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return count;
}
static DEVICE_ATTR(bt_coex_state, S_IRUGO | S_IWUSR,
wl1271_sysfs_show_bt_coex_state,
wl1271_sysfs_store_bt_coex_state);
static ssize_t wl1271_sysfs_show_hw_pg_ver(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct wl1271 *wl = dev_get_drvdata(dev);
ssize_t len;
len = PAGE_SIZE;
mutex_lock(&wl->mutex);
if (wl->hw_pg_ver >= 0)
len = snprintf(buf, len, "%d\n", wl->hw_pg_ver);
else
len = snprintf(buf, len, "n/a\n");
mutex_unlock(&wl->mutex);
return len;
}
static DEVICE_ATTR(hw_pg_ver, S_IRUGO,
wl1271_sysfs_show_hw_pg_ver, NULL);
static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buffer, loff_t pos, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct wl1271 *wl = dev_get_drvdata(dev);
ssize_t len;
int ret;
ret = mutex_lock_interruptible(&wl->mutex);
if (ret < 0)
return -ERESTARTSYS;
/* Let only one thread read the log at a time, blocking others */
while (wl->fwlog_size == 0) {
DEFINE_WAIT(wait);
prepare_to_wait_exclusive(&wl->fwlog_waitq,
&wait,
TASK_INTERRUPTIBLE);
if (wl->fwlog_size != 0) {
finish_wait(&wl->fwlog_waitq, &wait);
break;
}
mutex_unlock(&wl->mutex);
schedule();
finish_wait(&wl->fwlog_waitq, &wait);
if (signal_pending(current))
return -ERESTARTSYS;
ret = mutex_lock_interruptible(&wl->mutex);
if (ret < 0)
return -ERESTARTSYS;
}
/* Check if the fwlog is still valid */
if (wl->fwlog_size < 0) {
mutex_unlock(&wl->mutex);
return 0;
}
/* Seeking is not supported - old logs are not kept. Disregard pos. */
len = min(count, (size_t)wl->fwlog_size);
wl->fwlog_size -= len;
memcpy(buffer, wl->fwlog, len);
/* Make room for new messages */
memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size);
mutex_unlock(&wl->mutex);
return len;
}
static struct bin_attribute fwlog_attr = {
.attr = {.name = "fwlog", .mode = S_IRUSR},
.read = wl1271_sysfs_read_fwlog,
};
int wlcore_sysfs_init(struct wl1271 *wl)
{
int ret;
/* Create sysfs file to control bt coex state */
ret = device_create_file(wl->dev, &dev_attr_bt_coex_state);
if (ret < 0) {
wl1271_error("failed to create sysfs file bt_coex_state");
goto out;
}
/* Create sysfs file to get HW PG version */
ret = device_create_file(wl->dev, &dev_attr_hw_pg_ver);
if (ret < 0) {
wl1271_error("failed to create sysfs file hw_pg_ver");
goto out_bt_coex_state;
}
/* Create sysfs file for the FW log */
ret = device_create_bin_file(wl->dev, &fwlog_attr);
if (ret < 0) {
wl1271_error("failed to create sysfs file fwlog");
goto out_hw_pg_ver;
}
goto out;
out_hw_pg_ver:
device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
out_bt_coex_state:
device_remove_file(wl->dev, &dev_attr_bt_coex_state);
out:
return ret;
}
void wlcore_sysfs_free(struct wl1271 *wl)
{
device_remove_bin_file(wl->dev, &fwlog_attr);
device_remove_file(wl->dev, &dev_attr_hw_pg_ver);
device_remove_file(wl->dev, &dev_attr_bt_coex_state);
}
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