static int lenovo_sl_procfs_init(void)
{
struct proc_dir_entry *proc_ec;
proc_dir = proc_mkdir(LENSL_PROC_DIRNAME, acpi_root_dir);
if (!proc_dir) {
vdbg_printk(LENSL_ERR,
"Failed to create proc dir acpi/%s/\n", LENSL_PROC_DIRNAME);
return -ENOENT;
}
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,29)
proc_dir->owner = THIS_MODULE;
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
proc_ec = create_proc_entry(LENSL_PROC_EC, 0600, proc_dir);
#else
proc_ec = proc_create(LENSL_PROC_EC, 0600, proc_dir, &proc_fops);
#endif
if (!proc_ec) {
vdbg_printk(LENSL_ERR,
"Failed to create proc entry acpi/%s/%s\n",
LENSL_PROC_DIRNAME, LENSL_PROC_EC);
return -ENOENT;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
proc_ec->proc_fops = &proc_fops;
#endif
vdbg_printk(LENSL_DEBUG, "Initialized procfs debugging interface\n");
return 0;
}
static int lensl_radio_new_rfkill(struct lensl_radio *radio,
struct rfkill **rfk, bool sw_blocked,
bool hw_blocked)
{
int res;
*rfk = rfkill_alloc(radio->rfkname, &lensl_pdev->dev, radio->rfktype,
&rfkops, radio);
if (!*rfk) {
vdbg_printk(LENSL_ERR,
"Failed to allocate memory for rfkill class\n");
return -ENOMEM;
}
rfkill_set_hw_state(*rfk, hw_blocked);
rfkill_set_sw_state(*rfk, sw_blocked);
res = rfkill_register(*rfk);
if (res < 0) {
vdbg_printk(LENSL_ERR,
"Failed to register %s rfkill switch: %d\n",
radio->rfkname, res);
rfkill_destroy(*rfk);
*rfk = NULL;
return res;
}
return 0;
}
static int hkey_inputdev_init(void)
{
int result;
struct key_entry *key;
hkey_inputdev = input_allocate_device();
if (!hkey_inputdev) {
vdbg_printk(LENSL_ERR,
"Failed to allocate hotkey input device\n");
return -ENODEV;
}
hkey_inputdev->name = "Lenovo ThinkPad SL Series extra buttons";
hkey_inputdev->phys = LENSL_HKEY_FILE "/input0";
hkey_inputdev->uniq = LENSL_HKEY_FILE;
hkey_inputdev->id.bustype = BUS_HOST;
hkey_inputdev->id.vendor = PCI_VENDOR_ID_LENOVO;
hkey_inputdev->getkeycode = hkey_inputdev_getkeycode;
hkey_inputdev->setkeycode = hkey_inputdev_setkeycode;
set_bit(EV_KEY, hkey_inputdev->evbit);
for (key = ec_keymap; key->type != KE_END; key++)
set_bit(key->keycode, hkey_inputdev->keybit);
result = input_register_device(hkey_inputdev);
if (result) {
vdbg_printk(LENSL_ERR,
"Failed to register hotkey input device\n");
input_free_device(hkey_inputdev);
hkey_inputdev = NULL;
return -ENODEV;
}
vdbg_printk(LENSL_DEBUG, "Initialized hotkey subdriver\n");
return 0;
}
static int hwmon_init(void)
{
int res;
pwm1_value = -1;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,9,0)
lensl_hwmon_device = hwmon_device_register_with_info(&lensl_pdev->dev, "lenovo_sl_laptop", NULL, NULL, NULL);
#else
lensl_hwmon_device = hwmon_device_register(&lensl_pdev->dev);
#endif
if (!lensl_hwmon_device) {
vdbg_printk(LENSL_ERR, "Failed to register hwmon device\n");
return -ENODEV;
}
res = sysfs_create_group(&lensl_hwmon_device->kobj,
&hwmon_attr_group);
if (res < 0) {
vdbg_printk(LENSL_ERR, "Failed to create hwmon sysfs group\n");
hwmon_device_unregister(lensl_hwmon_device);
lensl_hwmon_device = NULL;
return -ENODEV;
}
vdbg_printk(LENSL_DEBUG, "Initialized hwmon subdriver\n");
return 0;
}
static int __init lenovo_sl_laptop_init(void)
{
int ret;
acpi_status status;
hkey_handle = ec0_handle = NULL;
if (acpi_disabled)
return -ENODEV;
lensl_wq = create_singlethread_workqueue(LENSL_WORKQUEUE_NAME);
if (!lensl_wq) {
vdbg_printk(LENSL_ERR, "Failed to create a workqueue\n");
return -ENOMEM;
}
status = acpi_get_handle(NULL, LENSL_HKEY, &hkey_handle);
if (ACPI_FAILURE(status)) {
vdbg_printk(LENSL_ERR,
"Failed to get ACPI handle for %s\n", LENSL_HKEY);
return -ENODEV;
}
status = acpi_get_handle(NULL, LENSL_EC0, &ec0_handle);
if (ACPI_FAILURE(status)) {
vdbg_printk(LENSL_ERR,
"Failed to get ACPI handle for %s\n", LENSL_EC0);
return -ENODEV;
}
lensl_pdev = platform_device_register_simple(LENSL_DRVR_NAME, -1,
NULL, 0);
if (IS_ERR(lensl_pdev)) {
ret = PTR_ERR(lensl_pdev);
lensl_pdev = NULL;
vdbg_printk(LENSL_ERR, "Failed to register platform device\n");
return ret;
}
ret = hkey_inputdev_init();
if (ret)
return -ENODEV;
radio_init(LENSL_BLUETOOTH);
radio_init(LENSL_WWAN);
radio_init(LENSL_UWB);
led_init();
mutex_init(&hkey_poll_mutex);
hwmon_init();
if (debug_ec)
lenovo_sl_procfs_init();
vdbg_printk(LENSL_INFO, "Loaded Lenovo ThinkPad SL Series driver\n");
return 0;
}
static int get_bcl(struct lensl_vector *levels)
{
int i, status;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *o, *obj;
if (!levels)
return -EINVAL;
if (levels->count) {
levels->count = 0;
kfree(levels->values);
}
/* _BCL returns an array sorted from high to low; the first two values
are *not* special (non-standard behavior) */
status = acpi_evaluate_object(lcdd_handle, "_BCL", NULL, &buffer);
if (!ACPI_SUCCESS(status))
return status;
obj = (union acpi_object *)buffer.pointer;
if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
vdbg_printk(LENSL_ERR, "Invalid _BCL data\n");
status = -EFAULT;
goto out;
}
levels->count = obj->package.count;
if (!levels->count)
goto out;
levels->values = kmalloc(levels->count * sizeof(int), GFP_KERNEL);
if (!levels->values) {
vdbg_printk(LENSL_ERR,
"Failed to allocate memory for brightness levels\n");
status = -ENOMEM;
goto out;
}
for (i = 0; i < obj->package.count; i++) {
o = (union acpi_object *)&obj->package.elements[i];
if (o->type != ACPI_TYPE_INTEGER) {
vdbg_printk(LENSL_ERR, "Invalid brightness data\n");
goto err;
}
levels->values[i] = (int) o->integer.value;
}
goto out;
err:
levels->count = 0;
kfree(levels->values);
out:
kfree(buffer.pointer);
return status;
}
static int led_init(void)
{
int res;
memset(&led_tv, 0, sizeof(led_tv));
led_tv.cdev.brightness_get = led_tv_brightness_get_sysfs;
led_tv.cdev.brightness_set = led_tv_brightness_set_sysfs;
led_tv.cdev.blink_set = led_tv_blink_set_sysfs;
led_tv.cdev.name = LENSL_LED_TV_NAME;
INIT_WORK(&led_tv.work, led_tv_worker);
set_tvls(LENSL_LED_TV_OFF);
res = led_classdev_register(&lensl_pdev->dev, &led_tv.cdev);
if (res) {
vdbg_printk(LENSL_WARNING, "Failed to register LED device\n");
return res;
}
led_tv.supported = 1;
vdbg_printk(LENSL_DEBUG, "Initialized LED subdriver\n");
return 0;
}
static int backlight_init(void)
{
int status = 0;
lcdd_handle = NULL;
backlight = NULL;
backlight_levels.count = 0;
backlight_levels.values = NULL;
status = acpi_get_handle(NULL, LENSL_LCDD, &lcdd_handle);
if (ACPI_FAILURE(status)) {
vdbg_printk(LENSL_ERR,
"Failed to get ACPI handle for %s\n", LENSL_LCDD);
return -EIO;
}
status = get_bcl(&backlight_levels);
if (status || !backlight_levels.count)
goto err;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,34)
backlight = backlight_device_register(LENSL_BACKLIGHT_NAME,
NULL, NULL, &lensl_backlight_ops, NULL);
#else
backlight = backlight_device_register(LENSL_BACKLIGHT_NAME,
NULL, NULL, &lensl_backlight_ops);
#endif
backlight->props.max_brightness = backlight_levels.count - 1;
backlight->props.brightness = lensl_bd_get_brightness(backlight);
vdbg_printk(LENSL_INFO, "Started backlight brightness control\n");
goto out;
err:
if (backlight_levels.count) {
kfree(backlight_levels.values);
backlight_levels.count = 0;
}
vdbg_printk(LENSL_ERR,
"Failed to start backlight brightness control\n");
out:
return status;
}
static void hkey_poll_start(void)
{
hkey_ec_prev_offset = 0;
mutex_lock(&hkey_poll_mutex);
hkey_poll_task = kthread_run(hkey_poll_kthread,
NULL, LENSL_HKEY_POLL_KTHREAD_NAME);
if (IS_ERR(hkey_poll_task)) {
hkey_poll_task = NULL;
vdbg_printk(LENSL_ERR,
"Could not create kernel thread for hotkey polling\n");
}
mutex_unlock(&hkey_poll_mutex);
}
static int hwmon_init(void)
{
int res;
pwm1_value = -1;
lensl_hwmon_device = hwmon_device_register(&lensl_pdev->dev);
if (!lensl_hwmon_device) {
vdbg_printk(LENSL_ERR, "Failed to register hwmon device\n");
return -ENODEV;
}
res = sysfs_create_group(&lensl_hwmon_device->kobj,
&hwmon_attr_group);
if (res < 0) {
vdbg_printk(LENSL_ERR, "Failed to create hwmon sysfs group\n");
hwmon_device_unregister(lensl_hwmon_device);
lensl_hwmon_device = NULL;
return -ENODEV;
}
vdbg_printk(LENSL_DEBUG, "Initialized hwmon subdriver\n");
return 0;
}
static int lensl_acpi_int_func(acpi_handle handle, char *pathname, int *ret,
int n_arg, ...)
{
acpi_status status;
struct acpi_object_list params;
union acpi_object in_obj[LENSL_MAX_ACPI_ARGS], out_obj;
struct acpi_buffer result, *resultp;
int i;
va_list ap;
if (!handle)
return -EINVAL;
if (n_arg < 0 || n_arg > LENSL_MAX_ACPI_ARGS)
return -EINVAL;
va_start(ap, n_arg);
for (i = 0; i < n_arg; i++) {
in_obj[i].integer.value = va_arg(ap, int);
in_obj[i].type = ACPI_TYPE_INTEGER;
}
va_end(ap);
params.count = n_arg;
params.pointer = in_obj;
if (ret) {
result.length = sizeof(out_obj);
result.pointer = &out_obj;
resultp = &result;
} else
resultp = NULL;
status = acpi_evaluate_object(handle, pathname, ¶ms, resultp);
if (ACPI_FAILURE(status))
return -EIO;
if (ret)
*ret = out_obj.integer.value;
vdbg_printk(LENSL_DEBUG, "ACPI : %s(", pathname);
if (dbg_level >= LENSL_DEBUG) {
for (i = 0; i < n_arg; i++) {
if (i)
printk(", ");
printk("%d", (int)in_obj[i].integer.value);
}
printk(")");
if (ret)
printk(" == %d", *ret);
printk("\n");
}
return 0;
}
static void __exit lenovo_sl_laptop_exit(void)
{
lenovo_sl_procfs_exit();
hwmon_exit();
hkey_poll_stop();
led_exit();
backlight_exit();
bluetooth_exit();
hkey_inputdev_exit();
if (lensl_pdev)
platform_device_unregister(lensl_pdev);
destroy_workqueue(lensl_wq);
vdbg_printk(LENSL_INFO, "Unloaded Lenovo ThinkPad SL Series driver\n");
}
static int lensl_radio_new_rfkill(struct lensl_radio *radio,
struct rfkill **rfk, bool sw_blocked,
bool hw_blocked)
{
int res;
*rfk = rfkill_allocate(&lensl_pdev->dev, radio->rfktype);
if (!*rfk) {
vdbg_printk(LENSL_ERR,
"Failed to allocate memory for rfkill class\n");
return -ENOMEM;
}
(*rfk)->name = radio->rfkname;
(*rfk)->get_state = lensl_radio_rfkill_get_state;
(*rfk)->toggle_radio = lensl_radio_rfkill_toggle_radio;
(*rfk)->data = radio;
if (hw_blocked)
(*rfk)->state = RFKILL_STATE_HARD_BLOCKED;
else if (sw_blocked)
(*rfk)->state = RFKILL_STATE_SOFT_BLOCKED;
else
(*rfk)->state = RFKILL_STATE_UNBLOCKED;
res = rfkill_register(*rfk);
if (res < 0) {
vdbg_printk(LENSL_ERR,
"Failed to register %s rfkill switch: %d\n",
radio->rfkname, res);
rfkill_free(*rfk);
*rfk = NULL;
return res;
}
return 0;
}
static int bluetooth_init(void)
{
int value, res;
bluetooth_present = 0;
if (!hkey_handle)
return -ENODEV;
if (get_gbdc(&value))
return -EIO;
if (!(value & TP_ACPI_BLUETOOTH_HWPRESENT))
return -ENODEV;
bluetooth_present = 1;
res = sysfs_create_group(&lensl_pdev->dev.kobj,
&bluetooth_attr_group);
if (res) {
vdbg_printk(LENSL_ERR,
"Failed to register bluetooth sysfs group\n");
return res;
}
bluetooth_pretend_blocked = !bluetooth_auto_enable;
res = lensl_new_rfkill(LENSL_RFK_BLUETOOTH_SW_ID,
&bluetooth_rfkill,
RFKILL_TYPE_BLUETOOTH,
"lensl_bluetooth_sw",
bluetooth_rfk_set,
bluetooth_rfk_get);
bluetooth_pretend_blocked = 0;
if (res) {
bluetooth_exit();
return res;
}
vdbg_printk(LENSL_DEBUG, "Initialized bluetooth subdriver\n");
return 0;
}
static int lensl_new_rfkill(const unsigned int id,
struct rfkill **rfk,
const enum rfkill_type rfktype,
const char *name,
int (*toggle_radio)(void *, enum rfkill_state),
int (*get_state)(void *, enum rfkill_state *))
{
int res;
enum rfkill_state initial_state;
*rfk = rfkill_allocate(&lensl_pdev->dev, rfktype);
if (!*rfk) {
vdbg_printk(LENSL_ERR,
"Failed to allocate memory for rfkill class\n");
return -ENOMEM;
}
(*rfk)->name = name;
(*rfk)->get_state = get_state;
(*rfk)->toggle_radio = toggle_radio;
if (!get_state(NULL, &initial_state))
(*rfk)->state = initial_state;
res = rfkill_register(*rfk);
if (res < 0) {
vdbg_printk(LENSL_ERR,
"Failed to register %s rfkill switch: %d\n",
name, res);
rfkill_free(*rfk);
*rfk = NULL;
return res;
}
return 0;
}
static int lenovo_sl_procfs_init(void)
{
struct proc_dir_entry *proc_ec;
proc_dir = proc_mkdir(LENSL_PROC_DIRNAME, acpi_root_dir);
if (!proc_dir) {
vdbg_printk(LENSL_ERR,
"Failed to create proc dir acpi/%s/\n", LENSL_PROC_DIRNAME);
return -ENOENT;
}
proc_dir->owner = THIS_MODULE;
proc_ec = create_proc_entry(LENSL_PROC_EC, 0600, proc_dir);
if (!proc_ec) {
vdbg_printk(LENSL_ERR,
"Failed to create proc entry acpi/%s/%s\n",
LENSL_PROC_DIRNAME, LENSL_PROC_EC);
return -ENOENT;
}
proc_ec->read_proc = lensl_ec_read_procmem;
proc_ec->write_proc = lensl_ec_write_procmem;
vdbg_printk(LENSL_DEBUG, "Initialized procfs debugging interface\n");
return 0;
}
static int radio_init(lensl_radio_type type)
{
int value, res, hw_blocked = 0, sw_blocked;
if (!hkey_handle)
return -ENODEV;
lensl_radios[type].present = 1; /* need for lensl_radio_get */
res = lensl_radio_get(&lensl_radios[type], &hw_blocked, &value);
lensl_radios[type].present = 0;
if (res && !hw_blocked)
return -EIO;
if (!(value & LENSL_RADIO_HWPRESENT))
return -ENODEV;
lensl_radios[type].present = 1;
if (*lensl_radios[type].auto_enable) {
sw_blocked = 0;
value |= LENSL_RADIO_RADIOSSW;
lensl_radios[type].set_acpi(value);
} else {
sw_blocked = 1;
value &= ~LENSL_RADIO_RADIOSSW;
lensl_radios[type].set_acpi(value);
}
res = lensl_radio_new_rfkill(&lensl_radios[type], &lensl_radios[type].rfk,
sw_blocked, hw_blocked);
if (res) {
radio_exit(type);
return res;
}
vdbg_printk(LENSL_DEBUG, "Initialized %s subdriver\n",
lensl_radios[type].name);
return 0;
}
static int hkey_poll_kthread(void *data)
{
unsigned long t = 0;
int offset, level;
unsigned int keycode;
u8 scancode;
mutex_lock(&hkey_poll_mutex);
offset = hkey_ec_get_offset();
if (offset < 0) {
vdbg_printk(LENSL_WARNING,
"Failed to read hotkey register offset from EC\n");
hkey_ec_prev_offset = 0;
} else
hkey_ec_prev_offset = offset;
while (!kthread_should_stop() && hkey_poll_hz) {
if (t == 0)
t = 1000/hkey_poll_hz;
t = msleep_interruptible(t);
if (unlikely(kthread_should_stop()))
break;
try_to_freeze();
if (t > 0)
continue;
offset = hkey_ec_get_offset();
if (offset < 0) {
vdbg_printk(LENSL_WARNING,
"Failed to read hotkey register offset from EC\n");
continue;
}
if (offset == hkey_ec_prev_offset)
continue;
if (ec_read(0x0A + offset, &scancode)) {
vdbg_printk(LENSL_WARNING,
"Failed to read hotkey code from EC\n");
continue;
}
keycode = ec_scancode_to_keycode(scancode);
vdbg_printk(LENSL_DEBUG,
"Got hotkey keycode %d (scancode %d)\n", keycode, scancode);
/* Special handling for brightness keys. We do it here and not
via an ACPI notifier in order to prevent possible conflicts
with video.c */
if (keycode == KEY_BRIGHTNESSDOWN) {
if (control_backlight && backlight) {
level = lensl_bd_get_brightness(backlight);
if (0 <= --level)
lensl_bd_set_brightness_int(level);
} else
keycode = KEY_RESERVED;
} else if (keycode == KEY_BRIGHTNESSUP) {
if (control_backlight && backlight) {
level = lensl_bd_get_brightness(backlight);
if (backlight_levels.count > ++level)
lensl_bd_set_brightness_int(level);
} else
keycode = KEY_RESERVED;
}
if (keycode != KEY_RESERVED) {
input_report_key(hkey_inputdev, keycode, 1);
input_sync(hkey_inputdev);
input_report_key(hkey_inputdev, keycode, 0);
input_sync(hkey_inputdev);
}
hkey_ec_prev_offset = offset;
}
mutex_unlock(&hkey_poll_mutex);
return 0;
}
static int __init lenovo_sl_laptop_init(void)
{
int ret;
acpi_status status;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
if (!acpi_video_backlight_support())
control_backlight = 1;
#endif
hkey_handle = ec0_handle = NULL;
if (acpi_disabled)
return -ENODEV;
lensl_wq = create_singlethread_workqueue(LENSL_WORKQUEUE_NAME);
if (!lensl_wq) {
vdbg_printk(LENSL_ERR, "Failed to create a workqueue\n");
return -ENOMEM;
}
status = acpi_get_handle(NULL, LENSL_HKEY, &hkey_handle);
if (ACPI_FAILURE(status)) {
vdbg_printk(LENSL_ERR,
"Failed to get ACPI handle for %s\n", LENSL_HKEY);
return -ENODEV;
}
status = acpi_get_handle(NULL, LENSL_EC0, &ec0_handle);
if (ACPI_FAILURE(status)) {
vdbg_printk(LENSL_ERR,
"Failed to get ACPI handle for %s\n", LENSL_EC0);
return -ENODEV;
}
lensl_pdev = platform_device_register_simple(LENSL_DRVR_NAME, -1,
NULL, 0);
if (IS_ERR(lensl_pdev)) {
ret = PTR_ERR(lensl_pdev);
lensl_pdev = NULL;
vdbg_printk(LENSL_ERR, "Failed to register platform device\n");
return ret;
}
ret = hkey_inputdev_init();
if (ret)
return -ENODEV;
bluetooth_init();
if (control_backlight)
backlight_init();
led_init();
mutex_init(&hkey_poll_mutex);
hkey_poll_start();
hwmon_init();
if (debug_ec)
lenovo_sl_procfs_init();
vdbg_printk(LENSL_INFO, "Loaded Lenovo ThinkPad SL Series driver\n");
return 0;
}