1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Copyright (C) 2013 - 2014 Hans de Goede <hdegoede@redhat.com>
12  * The sun4i-ts controller is capable of detecting a second touch, but when a
18  * open / close movement, and then reports emulated multi-touch events around
19  * the last touch coordinate (as the dual-touch coordinates are worthless).
22  * in the kernel). So this driver offers straight forward, reliable single
122 		x = readl(ts->base + TP_DATA);  in sun4i_ts_irq_handle_input()
123 		y = readl(ts->base + TP_DATA);  in sun4i_ts_irq_handle_input()
125 		if (!ts->ignore_fifo_data) {  in sun4i_ts_irq_handle_input()
126 			input_report_abs(ts->input, ABS_X, x);  in sun4i_ts_irq_handle_input()
127 			input_report_abs(ts->input, ABS_Y, y);  in sun4i_ts_irq_handle_input()
133 			input_report_key(ts->input, BTN_TOUCH, 1);  in sun4i_ts_irq_handle_input()
134 			input_sync(ts->input);  in sun4i_ts_irq_handle_input()
136 			ts->ignore_fifo_data = false;  in sun4i_ts_irq_handle_input()
141 		ts->ignore_fifo_data = true;  in sun4i_ts_irq_handle_input()
142 		input_report_key(ts->input, BTN_TOUCH, 0);  in sun4i_ts_irq_handle_input()
143 		input_sync(ts->input);  in sun4i_ts_irq_handle_input()
152 	reg_val  = readl(ts->base + TP_INT_FIFOS);  in sun4i_ts_irq()
155 		ts->temp_data = readl(ts->base + TEMP_DATA);  in sun4i_ts_irq()
157 	if (ts->input)  in sun4i_ts_irq()
160 	writel(reg_val, ts->base + TP_INT_FIFOS);  in sun4i_ts_irq()
171 		TP_UP_IRQ_EN(1), ts->base + TP_INT_FIFOC);  in sun4i_ts_open()
181 	writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC);  in sun4i_ts_close()
187 	if (ts->temp_data == -1)  in sun4i_get_temp()
188 		return -EAGAIN;  in sun4i_get_temp()
190 	*temp = ts->temp_data * ts->temp_step - ts->temp_offset;  in sun4i_get_temp()
237 	struct device *dev = &pdev->dev;  in sun4i_ts_probe()
238 	struct device_node *np = dev->of_node;  in sun4i_ts_probe()
249 		return -ENOMEM;  in sun4i_ts_probe()
251 	ts->dev = dev;  in sun4i_ts_probe()
252 	ts->ignore_fifo_data = true;  in sun4i_ts_probe()
253 	ts->temp_data = -1;  in sun4i_ts_probe()
254 	if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts")) {  in sun4i_ts_probe()
255 		/* Allwinner SDK has temperature (C) = (value / 6) - 271 */  in sun4i_ts_probe()
256 		ts->temp_offset = 271000;  in sun4i_ts_probe()
257 		ts->temp_step = 167;  in sun4i_ts_probe()
258 	} else if (of_device_is_compatible(np, "allwinner,sun4i-a10-ts")) {  in sun4i_ts_probe()
263 		 * temp_step from 0.096 - 0.170 and temp_offset from 176 - 331.  in sun4i_ts_probe()
265 		ts->temp_offset = 257000;  in sun4i_ts_probe()
266 		ts->temp_step = 133;  in sun4i_ts_probe()
271 		 * which is designed by X-Powers, an affiliate of Allwinner:  in sun4i_ts_probe()
273 		 *     temperature (C) = (value * 0.1) - 144.7  in sun4i_ts_probe()
279 		ts->temp_offset = 144700;  in sun4i_ts_probe()
280 		ts->temp_step = 100;  in sun4i_ts_probe()
283 	ts_attached = of_property_read_bool(np, "allwinner,ts-attached");  in sun4i_ts_probe()
285 		ts->input = devm_input_allocate_device(dev);  in sun4i_ts_probe()
286 		if (!ts->input)  in sun4i_ts_probe()
287 			return -ENOMEM;  in sun4i_ts_probe()
289 		ts->input->name = pdev->name;  in sun4i_ts_probe()
290 		ts->input->phys = "sun4i_ts/input0";  in sun4i_ts_probe()
291 		ts->input->open = sun4i_ts_open;  in sun4i_ts_probe()
292 		ts->input->close = sun4i_ts_close;  in sun4i_ts_probe()
293 		ts->input->id.bustype = BUS_HOST;  in sun4i_ts_probe()
294 		ts->input->id.vendor = 0x0001;  in sun4i_ts_probe()
295 		ts->input->id.product = 0x0001;  in sun4i_ts_probe()
296 		ts->input->id.version = 0x0100;  in sun4i_ts_probe()
297 		ts->input->evbit[0] =  BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS);  in sun4i_ts_probe()
298 		__set_bit(BTN_TOUCH, ts->input->keybit);  in sun4i_ts_probe()
299 		input_set_abs_params(ts->input, ABS_X, 0, 4095, 0, 0);  in sun4i_ts_probe()
300 		input_set_abs_params(ts->input, ABS_Y, 0, 4095, 0, 0);  in sun4i_ts_probe()
301 		input_set_drvdata(ts->input, ts);  in sun4i_ts_probe()
304 	ts->base = devm_platform_ioremap_resource(pdev, 0);  in sun4i_ts_probe()
305 	if (IS_ERR(ts->base))  in sun4i_ts_probe()
306 		return PTR_ERR(ts->base);  in sun4i_ts_probe()
308 	ts->irq = platform_get_irq(pdev, 0);  in sun4i_ts_probe()
309 	error = devm_request_irq(dev, ts->irq, sun4i_ts_irq, 0, "sun4i-ts", ts);  in sun4i_ts_probe()
318 	       ts->base + TP_CTRL0);  in sun4i_ts_probe()
324 	of_property_read_u32(np, "allwinner,tp-sensitive-adjust",  in sun4i_ts_probe()
327 	       ts->base + TP_CTRL2);  in sun4i_ts_probe()
333 	of_property_read_u32(np, "allwinner,filter-type", &filter_type);  in sun4i_ts_probe()
334 	writel(FILTER_EN(1) | FILTER_TYPE(filter_type), ts->base + TP_CTRL3);  in sun4i_ts_probe()
337 	writel(TEMP_ENABLE(1) | TEMP_PERIOD(1953), ts->base + TP_TPR);  in sun4i_ts_probe()
344 	if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts"))  in sun4i_ts_probe()
348 	writel(reg, ts->base + TP_CTRL1);  in sun4i_ts_probe()
351 	 * The thermal core does not register hwmon devices for DT-based  in sun4i_ts_probe()
354 	hwmon = devm_hwmon_device_register_with_groups(ts->dev, "sun4i_ts",  in sun4i_ts_probe()
359 	thermal = devm_thermal_of_zone_register(ts->dev, 0, ts,  in sun4i_ts_probe()
364 	writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC);  in sun4i_ts_probe()
367 		error = input_register_device(ts->input);  in sun4i_ts_probe()
369 			writel(0, ts->base + TP_INT_FIFOC);  in sun4i_ts_probe()
383 	if (ts->input)  in sun4i_ts_remove()
384 		input_unregister_device(ts->input);  in sun4i_ts_remove()
387 	writel(0, ts->base + TP_INT_FIFOC);  in sun4i_ts_remove()
391 	{ .compatible = "allwinner,sun4i-a10-ts", },
392 	{ .compatible = "allwinner,sun5i-a13-ts", },
393 	{ .compatible = "allwinner,sun6i-a31-ts", },
400 		.name	= "sun4i-ts",