98 	struct ps2_gpio_data *drvdata = serio->port_data;  in ps2_gpio_open()  local
100 	drvdata->t_irq_last = 0;  in ps2_gpio_open()
101 	drvdata->tx.t_xfer_end = 0;  in ps2_gpio_open()
103 	enable_irq(drvdata->irq);  in ps2_gpio_open()
109 	struct ps2_gpio_data *drvdata = serio->port_data;  in ps2_gpio_close()  local
111 	flush_delayed_work(&drvdata->tx.work);  in ps2_gpio_close()
112 	disable_irq(drvdata->irq);  in ps2_gpio_close()
117 	struct ps2_gpio_data *drvdata = serio->port_data;  in __ps2_gpio_write()  local
119 	disable_irq_nosync(drvdata->irq);  in __ps2_gpio_write()
120 	gpiod_direction_output(drvdata->gpio_clk, 0);  in __ps2_gpio_write()
122 	drvdata->mode = PS2_MODE_TX;  in __ps2_gpio_write()
123 	drvdata->tx.byte = val;  in __ps2_gpio_write()
125 	schedule_delayed_work(&drvdata->tx.work, usecs_to_jiffies(200));  in __ps2_gpio_write()
132 	struct ps2_gpio_data *drvdata = serio->port_data;  in ps2_gpio_write()  local
136 		mutex_lock(&drvdata->tx.mutex);  in ps2_gpio_write()
138 		if (!wait_for_completion_timeout(&drvdata->tx.complete,  in ps2_gpio_write()
141 		mutex_unlock(&drvdata->tx.mutex);  in ps2_gpio_write()
152 	struct ps2_gpio_data *drvdata = container_of(dwork,  in ps2_gpio_tx_work_fn()  local
156 	drvdata->tx.t_xfer_start = ktime_get();  in ps2_gpio_tx_work_fn()
157 	enable_irq(drvdata->irq);  in ps2_gpio_tx_work_fn()
158 	gpiod_direction_output(drvdata->gpio_data, 0);  in ps2_gpio_tx_work_fn()
159 	gpiod_direction_input(drvdata->gpio_clk);  in ps2_gpio_tx_work_fn()
162 static irqreturn_t ps2_gpio_irq_rx(struct ps2_gpio_data *drvdata)  in ps2_gpio_irq_rx()  argument
169 	byte = drvdata->rx.byte;  in ps2_gpio_irq_rx()
170 	cnt = drvdata->rx.cnt;  in ps2_gpio_irq_rx()
172 	drvdata->t_irq_now = ktime_get();  in ps2_gpio_irq_rx()
178 	us_delta = ktime_us_delta(drvdata->t_irq_now, drvdata->tx.t_xfer_end);  in ps2_gpio_irq_rx()
182 	us_delta = ktime_us_delta(drvdata->t_irq_now, drvdata->t_irq_last);  in ps2_gpio_irq_rx()
184 		dev_err(drvdata->dev,  in ps2_gpio_irq_rx()
191 	drvdata->t_irq_last = drvdata->t_irq_now;  in ps2_gpio_irq_rx()
193 	data = gpiod_get_value(drvdata->gpio_data);  in ps2_gpio_irq_rx()
195 		dev_err(drvdata->dev, "RX: failed to get data gpio val: %d\n",  in ps2_gpio_irq_rx()
204 			dev_err(drvdata->dev, "RX: start bit should be low\n");  in ps2_gpio_irq_rx()
224 			dev_warn(drvdata->dev, "RX: parity error\n");  in ps2_gpio_irq_rx()
225 			if (!drvdata->write_enable)  in ps2_gpio_irq_rx()
232 			dev_err(drvdata->dev, "RX: stop bit should be high\n");  in ps2_gpio_irq_rx()
240 		if (!drvdata->write_enable) {  in ps2_gpio_irq_rx()
247 		serio_interrupt(drvdata->serio, byte, rxflags);  in ps2_gpio_irq_rx()
248 		dev_dbg(drvdata->dev, "RX: sending byte 0x%x\n", byte);  in ps2_gpio_irq_rx()
254 		dev_err(drvdata->dev, "RX: got out of sync with the device\n");  in ps2_gpio_irq_rx()
263 	__ps2_gpio_write(drvdata->serio, PS2_CMD_RESEND);  in ps2_gpio_irq_rx()
265 	drvdata->rx.cnt = cnt;  in ps2_gpio_irq_rx()
266 	drvdata->rx.byte = byte;  in ps2_gpio_irq_rx()
270 static irqreturn_t ps2_gpio_irq_tx(struct ps2_gpio_data *drvdata)  in ps2_gpio_irq_tx()  argument
276 	cnt = drvdata->tx.cnt;  in ps2_gpio_irq_tx()
277 	byte = drvdata->tx.byte;  in ps2_gpio_irq_tx()
279 	drvdata->t_irq_now = ktime_get();  in ps2_gpio_irq_tx()
287 	us_delta = ktime_us_delta(drvdata->t_irq_now,  in ps2_gpio_irq_tx()
288 				  drvdata->tx.t_xfer_start);  in ps2_gpio_irq_tx()
292 	us_delta = ktime_us_delta(drvdata->t_irq_now, drvdata->t_irq_last);  in ps2_gpio_irq_tx()
294 		dev_err(drvdata->dev,  in ps2_gpio_irq_tx()
301 	drvdata->t_irq_last = drvdata->t_irq_now;  in ps2_gpio_irq_tx()
306 		dev_err(drvdata->dev,  in ps2_gpio_irq_tx()
318 		gpiod_set_value(drvdata->gpio_data, data);  in ps2_gpio_irq_tx()
323 		gpiod_set_value(drvdata->gpio_data, data);  in ps2_gpio_irq_tx()
327 		gpiod_direction_input(drvdata->gpio_data);  in ps2_gpio_irq_tx()
330 		data = gpiod_get_value(drvdata->gpio_data);  in ps2_gpio_irq_tx()
332 			dev_warn(drvdata->dev, "TX: received NACK, retry\n");  in ps2_gpio_irq_tx()
336 		drvdata->tx.t_xfer_end = ktime_get();  in ps2_gpio_irq_tx()
337 		drvdata->mode = PS2_MODE_RX;  in ps2_gpio_irq_tx()
338 		complete(&drvdata->tx.complete);  in ps2_gpio_irq_tx()
347 		gpiod_direction_input(drvdata->gpio_data);  in ps2_gpio_irq_tx()
348 		dev_err(drvdata->dev, "TX: got out of sync with the device\n");  in ps2_gpio_irq_tx()
357 	gpiod_direction_input(drvdata->gpio_data);  in ps2_gpio_irq_tx()
358 	__ps2_gpio_write(drvdata->serio, drvdata->tx.byte);  in ps2_gpio_irq_tx()
360 	drvdata->tx.cnt = cnt;  in ps2_gpio_irq_tx()
366 	struct ps2_gpio_data *drvdata = dev_id;  in ps2_gpio_irq()  local
368 	return drvdata->mode ? ps2_gpio_irq_tx(drvdata) :  in ps2_gpio_irq()
369 		ps2_gpio_irq_rx(drvdata);  in ps2_gpio_irq()
373 				 struct ps2_gpio_data *drvdata)  in ps2_gpio_get_props()  argument
380 	drvdata->gpio_data = devm_gpiod_get(dev, "data", gflags);  in ps2_gpio_get_props()
381 	if (IS_ERR(drvdata->gpio_data)) {  in ps2_gpio_get_props()
383 			PTR_ERR(drvdata->gpio_data));  in ps2_gpio_get_props()
384 		return PTR_ERR(drvdata->gpio_data);  in ps2_gpio_get_props()
387 	drvdata->gpio_clk = devm_gpiod_get(dev, "clk", gflags);  in ps2_gpio_get_props()
388 	if (IS_ERR(drvdata->gpio_clk)) {  in ps2_gpio_get_props()
390 			PTR_ERR(drvdata->gpio_clk));  in ps2_gpio_get_props()
391 		return PTR_ERR(drvdata->gpio_clk);  in ps2_gpio_get_props()
394 	drvdata->write_enable = device_property_read_bool(dev,  in ps2_gpio_get_props()
402 	struct ps2_gpio_data *drvdata;  in ps2_gpio_probe()  local
407 	drvdata = devm_kzalloc(dev, sizeof(struct ps2_gpio_data), GFP_KERNEL);  in ps2_gpio_probe()
409 	if (!drvdata || !serio) {  in ps2_gpio_probe()
414 	error = ps2_gpio_get_props(dev, drvdata);  in ps2_gpio_probe()
418 	if (gpiod_cansleep(drvdata->gpio_data) ||  in ps2_gpio_probe()
419 	    gpiod_cansleep(drvdata->gpio_clk)) {  in ps2_gpio_probe()
425 	drvdata->irq = platform_get_irq(pdev, 0);  in ps2_gpio_probe()
426 	if (drvdata->irq < 0) {  in ps2_gpio_probe()
427 		error = drvdata->irq;  in ps2_gpio_probe()
431 	error = devm_request_irq(dev, drvdata->irq, ps2_gpio_irq,  in ps2_gpio_probe()
432 				 IRQF_NO_THREAD, DRIVER_NAME, drvdata);  in ps2_gpio_probe()
435 			drvdata->irq, error);  in ps2_gpio_probe()
440 	disable_irq(drvdata->irq);  in ps2_gpio_probe()
449 	serio->write = drvdata->write_enable ? ps2_gpio_write : NULL;  in ps2_gpio_probe()
450 	serio->port_data = drvdata;  in ps2_gpio_probe()
455 	drvdata->serio = serio;  in ps2_gpio_probe()
456 	drvdata->dev = dev;  in ps2_gpio_probe()
457 	drvdata->mode = PS2_MODE_RX;  in ps2_gpio_probe()
463 	drvdata->tx.cnt = 1;  in ps2_gpio_probe()
465 	INIT_DELAYED_WORK(&drvdata->tx.work, ps2_gpio_tx_work_fn);  in ps2_gpio_probe()
466 	init_completion(&drvdata->tx.complete);  in ps2_gpio_probe()
467 	mutex_init(&drvdata->tx.mutex);  in ps2_gpio_probe()
470 	platform_set_drvdata(pdev, drvdata);  in ps2_gpio_probe()
481 	struct ps2_gpio_data *drvdata = platform_get_drvdata(pdev);  in ps2_gpio_remove()  local
483 	serio_unregister_port(drvdata->serio);  in ps2_gpio_remove()