static ssize_t b43legacy_debugfs_write(struct file *file,
const char __user *userbuf,
size_t count, loff_t *ppos)
{
struct b43legacy_wldev *dev;
struct b43legacy_debugfs_fops *dfops;
char *buf;
int err = 0;
if (!count)
return 0;
if (count > PAGE_SIZE)
return -E2BIG;
dev = file->private_data;
if (!dev)
return -ENODEV;
mutex_lock(&dev->wl->mutex);
if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
err = -ENODEV;
goto out_unlock;
}
dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops);
if (!dfops->write) {
err = -ENOSYS;
goto out_unlock;
}
buf = (char *)get_zeroed_page(GFP_KERNEL);
if (!buf) {
err = -ENOMEM;
goto out_unlock;
}
if (copy_from_user(buf, userbuf, count)) {
err = -EFAULT;
goto out_freepage;
}
if (dfops->take_irqlock) {
spin_lock_irq(&dev->wl->irq_lock);
err = dfops->write(dev, buf, count);
spin_unlock_irq(&dev->wl->irq_lock);
} else
err = dfops->write(dev, buf, count);
if (err)
goto out_freepage;
out_freepage:
free_page((unsigned long)buf);
out_unlock:
mutex_unlock(&dev->wl->mutex);
return err ? err : count;
}
bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
{
if (dev->phy.rev >= 3) {
if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
& B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
return 1;
} else {
if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
return 1;
if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
& B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
return 1;
}
return 0;
}
/* Returns TRUE, if the radio is enabled in hardware. */
bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
{
if (dev->phy.rev >= 3) {
if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
& B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
return 1;
} else {
/* To prevent CPU fault on PPC, do not read a register
* unless the interface is started; however, on resume
* for hibernation, this routine is entered early. When
* that happens, unconditionally return TRUE.
*/
if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
return 1;
if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
& B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
return 1;
}
return 0;
}
int b43legacy_sysfs_register(struct b43legacy_wldev *wldev)
{
struct device *dev = wldev->dev->dev;
int err;
B43legacy_WARN_ON(b43legacy_status(wldev) !=
B43legacy_STAT_INITIALIZED);
err = device_create_file(dev, &dev_attr_interference);
if (err)
goto out;
err = device_create_file(dev, &dev_attr_shortpreamble);
if (err)
goto err_remove_interfmode;
out:
return err;
err_remove_interfmode:
device_remove_file(dev, &dev_attr_interference);
goto out;
}
void b43legacy_rfkill_poll(struct ieee80211_hw *hw)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev = wl->current_dev;
struct ssb_bus *bus = dev->dev->bus;
bool enabled;
bool brought_up = false;
mutex_lock(&wl->mutex);
if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
if (ssb_bus_powerup(bus, 0)) {
mutex_unlock(&wl->mutex);
return;
}
ssb_device_enable(dev->dev, 0);
brought_up = true;
}
enabled = b43legacy_is_hw_radio_enabled(dev);
if (unlikely(enabled != dev->radio_hw_enable)) {
dev->radio_hw_enable = enabled;
b43legacyinfo(wl, "Radio hardware status changed to %s\n",
enabled ? "ENABLED" : "DISABLED");
wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
if (enabled != dev->phy.radio_on) {
if (enabled)
b43legacy_radio_turn_on(dev);
else
b43legacy_radio_turn_off(dev, 0);
}
}
if (brought_up) {
ssb_device_disable(dev->dev, 0);
ssb_bus_may_powerdown(bus);
}
mutex_unlock(&wl->mutex);
}
static ssize_t b43legacy_debugfs_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct b43legacy_wldev *dev;
struct b43legacy_debugfs_fops *dfops;
struct b43legacy_dfs_file *dfile;
ssize_t uninitialized_var(ret);
char *buf;
const size_t bufsize = 1024 * 16; /* 16 KiB buffer */
const size_t buforder = get_order(bufsize);
int err = 0;
if (!count)
return 0;
dev = file->private_data;
if (!dev)
return -ENODEV;
mutex_lock(&dev->wl->mutex);
if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
err = -ENODEV;
goto out_unlock;
}
dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops);
if (!dfops->read) {
err = -ENOSYS;
goto out_unlock;
}
dfile = fops_to_dfs_file(dev, dfops);
if (!dfile->buffer) {
buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
if (!buf) {
err = -ENOMEM;
goto out_unlock;
}
memset(buf, 0, bufsize);
if (dfops->take_irqlock) {
spin_lock_irq(&dev->wl->irq_lock);
ret = dfops->read(dev, buf, bufsize);
spin_unlock_irq(&dev->wl->irq_lock);
} else
ret = dfops->read(dev, buf, bufsize);
if (ret <= 0) {
free_pages((unsigned long)buf, buforder);
err = ret;
goto out_unlock;
}
dfile->data_len = ret;
dfile->buffer = buf;
}
ret = simple_read_from_buffer(userbuf, count, ppos,
dfile->buffer,
dfile->data_len);
if (*ppos >= dfile->data_len) {
free_pages((unsigned long)dfile->buffer, buforder);
dfile->buffer = NULL;
dfile->data_len = 0;
}
out_unlock:
mutex_unlock(&dev->wl->mutex);
return err ? err : ret;
}