58 static int sirf_serdev_open(struct sirf_data *data)  in sirf_serdev_open()  argument
62 	mutex_lock(&data->serdev_mutex);  in sirf_serdev_open()
63 	if (++data->serdev_count == 1) {  in sirf_serdev_open()
64 		ret = serdev_device_open(data->serdev);  in sirf_serdev_open()
66 			data->serdev_count--;  in sirf_serdev_open()
70 		serdev_device_set_baudrate(data->serdev, data->speed);  in sirf_serdev_open()
71 		serdev_device_set_flow_control(data->serdev, false);  in sirf_serdev_open()
75 	mutex_unlock(&data->serdev_mutex);  in sirf_serdev_open()
80 static void sirf_serdev_close(struct sirf_data *data)  in sirf_serdev_close()  argument
82 	mutex_lock(&data->serdev_mutex);  in sirf_serdev_close()
83 	if (--data->serdev_count == 0)  in sirf_serdev_close()
84 		serdev_device_close(data->serdev);  in sirf_serdev_close()
85 	mutex_unlock(&data->serdev_mutex);  in sirf_serdev_close()
90 	struct sirf_data *data = gnss_get_drvdata(gdev);  in sirf_open()  local
91 	struct serdev_device *serdev = data->serdev;  in sirf_open()
94 	mutex_lock(&data->gdev_mutex);  in sirf_open()
95 	data->open = true;  in sirf_open()
96 	mutex_unlock(&data->gdev_mutex);  in sirf_open()
98 	ret = sirf_serdev_open(data);  in sirf_open()
100 		mutex_lock(&data->gdev_mutex);  in sirf_open()
101 		data->open = false;  in sirf_open()
102 		mutex_unlock(&data->gdev_mutex);  in sirf_open()
116 	sirf_serdev_close(data);  in sirf_open()
118 	mutex_lock(&data->gdev_mutex);  in sirf_open()
119 	data->open = false;  in sirf_open()
120 	mutex_unlock(&data->gdev_mutex);  in sirf_open()
127 	struct sirf_data *data = gnss_get_drvdata(gdev);  in sirf_close()  local
128 	struct serdev_device *serdev = data->serdev;  in sirf_close()
130 	sirf_serdev_close(data);  in sirf_close()
134 	mutex_lock(&data->gdev_mutex);  in sirf_close()
135 	data->open = false;  in sirf_close()
136 	mutex_unlock(&data->gdev_mutex);  in sirf_close()
142 	struct sirf_data *data = gnss_get_drvdata(gdev);  in sirf_write_raw()  local
143 	struct serdev_device *serdev = data->serdev;  in sirf_write_raw()
166 	struct sirf_data *data = serdev_device_get_drvdata(serdev);  in sirf_receive_buf()  local
167 	struct gnss_device *gdev = data->gdev;  in sirf_receive_buf()
170 	if (!data->wakeup && !data->active) {  in sirf_receive_buf()
171 		data->active = true;  in sirf_receive_buf()
172 		wake_up_interruptible(&data->power_wait);  in sirf_receive_buf()
175 	mutex_lock(&data->gdev_mutex);  in sirf_receive_buf()
176 	if (data->open)  in sirf_receive_buf()
178 	mutex_unlock(&data->gdev_mutex);  in sirf_receive_buf()
190 	struct sirf_data *data = dev_id;  in sirf_wakeup_handler()  local
191 	struct device *dev = &data->serdev->dev;  in sirf_wakeup_handler()
194 	ret = gpiod_get_value_cansleep(data->wakeup);  in sirf_wakeup_handler()
199 	data->active = ret;  in sirf_wakeup_handler()
200 	wake_up_interruptible(&data->power_wait);  in sirf_wakeup_handler()
205 static int sirf_wait_for_power_state_nowakeup(struct sirf_data *data,  in sirf_wait_for_power_state_nowakeup()  argument
215 	data->active = false;  in sirf_wait_for_power_state_nowakeup()
216 	ret = wait_event_interruptible_timeout(data->power_wait,  in sirf_wait_for_power_state_nowakeup()
217 			data->active, msecs_to_jiffies(SIRF_REPORT_CYCLE));  in sirf_wait_for_power_state_nowakeup()
230 static int sirf_wait_for_power_state(struct sirf_data *data, bool active,  in sirf_wait_for_power_state()  argument
235 	if (!data->wakeup)  in sirf_wait_for_power_state()
236 		return sirf_wait_for_power_state_nowakeup(data, active, timeout);  in sirf_wait_for_power_state()
238 	ret = wait_event_interruptible_timeout(data->power_wait,  in sirf_wait_for_power_state()
239 			data->active == active, msecs_to_jiffies(timeout));  in sirf_wait_for_power_state()
244 		dev_warn(&data->serdev->dev, "timeout waiting for active state = %d\n",  in sirf_wait_for_power_state()
252 static void sirf_pulse_on_off(struct sirf_data *data)  in sirf_pulse_on_off()  argument
254 	gpiod_set_value_cansleep(data->on_off, 1);  in sirf_pulse_on_off()
256 	gpiod_set_value_cansleep(data->on_off, 0);  in sirf_pulse_on_off()
259 static int sirf_set_active(struct sirf_data *data, bool active)  in sirf_set_active()  argument
270 	if (!data->wakeup) {  in sirf_set_active()
271 		ret = sirf_serdev_open(data);  in sirf_set_active()
277 		sirf_pulse_on_off(data);  in sirf_set_active()
278 		ret = sirf_wait_for_power_state(data, active, timeout);  in sirf_set_active()
281 	if (!data->wakeup)  in sirf_set_active()
282 		sirf_serdev_close(data);  in sirf_set_active()
292 	struct sirf_data *data = dev_get_drvdata(dev);  in sirf_runtime_suspend()  local
296 	if (data->on_off)  in sirf_runtime_suspend()
297 		ret = sirf_set_active(data, false);  in sirf_runtime_suspend()
299 		ret = regulator_disable(data->vcc);  in sirf_runtime_suspend()
304 	ret = regulator_disable(data->lna);  in sirf_runtime_suspend()
311 	if (data->on_off)  in sirf_runtime_suspend()
312 		ret2 = sirf_set_active(data, true);  in sirf_runtime_suspend()
314 		ret2 = regulator_enable(data->vcc);  in sirf_runtime_suspend()
326 	struct sirf_data *data = dev_get_drvdata(dev);  in sirf_runtime_resume()  local
329 	ret = regulator_enable(data->lna);  in sirf_runtime_resume()
333 	if (data->on_off)  in sirf_runtime_resume()
334 		ret = sirf_set_active(data, true);  in sirf_runtime_resume()
336 		ret = regulator_enable(data->vcc);  in sirf_runtime_resume()
344 	regulator_disable(data->lna);  in sirf_runtime_resume()
351 	struct sirf_data *data = dev_get_drvdata(dev);  in sirf_suspend()  local
357 	if (data->wakeup)  in sirf_suspend()
358 		disable_irq(data->irq);  in sirf_suspend()
365 	struct sirf_data *data = dev_get_drvdata(dev);  in sirf_resume()  local
368 	if (data->wakeup)  in sirf_resume()
369 		enable_irq(data->irq);  in sirf_resume()
384 	struct sirf_data *data = serdev_device_get_drvdata(serdev);  in sirf_parse_dt()  local
390 	data->speed = speed;  in sirf_parse_dt()
399 	struct sirf_data *data;  in sirf_probe()  local
402 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);  in sirf_probe()
403 	if (!data)  in sirf_probe()
412 	gnss_set_drvdata(gdev, data);  in sirf_probe()
414 	data->serdev = serdev;  in sirf_probe()
415 	data->gdev = gdev;  in sirf_probe()
417 	mutex_init(&data->gdev_mutex);  in sirf_probe()
418 	mutex_init(&data->serdev_mutex);  in sirf_probe()
419 	init_waitqueue_head(&data->power_wait);  in sirf_probe()
421 	serdev_device_set_drvdata(serdev, data);  in sirf_probe()
428 	data->vcc = devm_regulator_get(dev, "vcc");  in sirf_probe()
429 	if (IS_ERR(data->vcc)) {  in sirf_probe()
430 		ret = PTR_ERR(data->vcc);  in sirf_probe()
434 	data->lna = devm_regulator_get(dev, "lna");  in sirf_probe()
435 	if (IS_ERR(data->lna)) {  in sirf_probe()
436 		ret = PTR_ERR(data->lna);  in sirf_probe()
440 	data->on_off = devm_gpiod_get_optional(dev, "sirf,onoff",  in sirf_probe()
442 	if (IS_ERR(data->on_off)) {  in sirf_probe()
443 		ret = PTR_ERR(data->on_off);  in sirf_probe()
447 	if (data->on_off) {  in sirf_probe()
448 		data->wakeup = devm_gpiod_get_optional(dev, "sirf,wakeup",  in sirf_probe()
450 		if (IS_ERR(data->wakeup)) {  in sirf_probe()
451 			ret = PTR_ERR(data->wakeup);  in sirf_probe()
455 		ret = regulator_enable(data->vcc);  in sirf_probe()
463 	if (data->wakeup) {  in sirf_probe()
464 		ret = gpiod_get_value_cansleep(data->wakeup);  in sirf_probe()
467 		data->active = ret;  in sirf_probe()
469 		ret = gpiod_to_irq(data->wakeup);  in sirf_probe()
472 		data->irq = ret;  in sirf_probe()
474 		ret = request_threaded_irq(data->irq, NULL, sirf_wakeup_handler,  in sirf_probe()
476 				"wakeup", data);  in sirf_probe()
481 	if (data->on_off) {  in sirf_probe()
482 		if (!data->wakeup) {  in sirf_probe()
483 			data->active = false;  in sirf_probe()
485 			ret = sirf_serdev_open(data);  in sirf_probe()
490 			sirf_serdev_close(data);  in sirf_probe()
494 		if (data->active) {  in sirf_probe()
495 			ret = sirf_set_active(data, false);  in sirf_probe()
525 	if (data->wakeup)  in sirf_probe()
526 		free_irq(data->irq, data);  in sirf_probe()
528 	if (data->on_off)  in sirf_probe()
529 		regulator_disable(data->vcc);  in sirf_probe()
531 	gnss_put_device(data->gdev);  in sirf_probe()
538 	struct sirf_data *data = serdev_device_get_drvdata(serdev);  in sirf_remove()  local
540 	gnss_deregister_device(data->gdev);  in sirf_remove()
547 	if (data->wakeup)  in sirf_remove()
548 		free_irq(data->irq, data);  in sirf_remove()
550 	if (data->on_off)  in sirf_remove()
551 		regulator_disable(data->vcc);  in sirf_remove()
553 	gnss_put_device(data->gdev);  in sirf_remove()