input/touchscreen/wm831x-ts.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
25  * R16424 (0x4028) - Touch Control 1
33 #define WM831X_TCH_DELAY_MASK                   0x00E0  /* TCH_DELAY - [7:5] */
34 #define WM831X_TCH_DELAY_SHIFT                       5  /* TCH_DELAY - [7:5] */
35 #define WM831X_TCH_DELAY_WIDTH                       3  /* TCH_DELAY - [7:5] */
36 #define WM831X_TCH_RATE_MASK                    0x001F  /* TCH_RATE - [4:0] */
37 #define WM831X_TCH_RATE_SHIFT                        0  /* TCH_RATE - [4:0] */
38 #define WM831X_TCH_RATE_WIDTH                        5  /* TCH_RATE - [4:0] */
41  * R16425 (0x4029) - Touch Control 2
47 #define WM831X_TCH_RPU_MASK                     0x000F  /* TCH_RPU - [3:0] */
48 #define WM831X_TCH_RPU_SHIFT                         0  /* TCH_RPU - [3:0] */
49 #define WM831X_TCH_RPU_WIDTH                         4  /* TCH_RPU - [3:0] */
52  * R16426-8 (0x402A-C) - Touch Data X/Y/X
55 #define WM831X_TCH_DATA_MASK                    0x0FFF  /* TCH_DATA - [11:0] */
56 #define WM831X_TCH_DATA_SHIFT                        0  /* TCH_DATA - [11:0] */
57 #define WM831X_TCH_DATA_WIDTH                       12  /* TCH_DATA - [11:0] */
74 	if (wm831x_ts->pen_down) {  in wm831x_pd_data_work()
75 		enable_irq(wm831x_ts->data_irq);  in wm831x_pd_data_work()
76 		dev_dbg(wm831x_ts->wm831x->dev, "IRQ PD->DATA done\n");  in wm831x_pd_data_work()
78 		enable_irq(wm831x_ts->pd_irq);  in wm831x_pd_data_work()
79 		dev_dbg(wm831x_ts->wm831x->dev, "IRQ DATA->PD done\n");  in wm831x_pd_data_work()
86 	struct wm831x *wm831x = wm831x_ts->wm831x;  in wm831x_ts_data_irq()
92 	if (wm831x_ts->pressure)  in wm831x_ts_data_irq()
103 		dev_err(wm831x->dev, "Failed to read touch data: %d\n",  in wm831x_ts_data_irq()
109 	 * We get a pen down reading on every reading, report pen up if any  in wm831x_ts_data_irq()
112 	wm831x_ts->pen_down = true;  in wm831x_ts_data_irq()
115 			wm831x_ts->pen_down = false;  in wm831x_ts_data_irq()
118 		input_report_abs(wm831x_ts->input_dev, data_types[i],  in wm831x_ts_data_irq()
122 	if (!wm831x_ts->pen_down) {  in wm831x_ts_data_irq()
123 		/* Switch from data to pen down */  in wm831x_ts_data_irq()
124 		dev_dbg(wm831x->dev, "IRQ DATA->PD\n");  in wm831x_ts_data_irq()
126 		disable_irq_nosync(wm831x_ts->data_irq);  in wm831x_ts_data_irq()
139 		if (wm831x_ts->pressure)  in wm831x_ts_data_irq()
140 			input_report_abs(wm831x_ts->input_dev,  in wm831x_ts_data_irq()
143 		input_report_key(wm831x_ts->input_dev, BTN_TOUCH, 0);  in wm831x_ts_data_irq()
145 		schedule_work(&wm831x_ts->pd_data_work);  in wm831x_ts_data_irq()
147 		input_report_key(wm831x_ts->input_dev, BTN_TOUCH, 1);  in wm831x_ts_data_irq()
150 	input_sync(wm831x_ts->input_dev);  in wm831x_ts_data_irq()
158 	struct wm831x *wm831x = wm831x_ts->wm831x;  in wm831x_ts_pen_down_irq()
161 	if (wm831x_ts->pen_down)  in wm831x_ts_pen_down_irq()
164 	disable_irq_nosync(wm831x_ts->pd_irq);  in wm831x_ts_pen_down_irq()
167 	if (wm831x_ts->pressure)  in wm831x_ts_pen_down_irq()
177 	wm831x_ts->pen_down = true;  in wm831x_ts_pen_down_irq()
179 	/* Switch from pen down to data */  in wm831x_ts_pen_down_irq()
180 	dev_dbg(wm831x->dev, "IRQ PD->DATA\n");  in wm831x_ts_pen_down_irq()
181 	schedule_work(&wm831x_ts->pd_data_work);  in wm831x_ts_pen_down_irq()
189 	struct wm831x *wm831x = wm831x_ts->wm831x;  in wm831x_ts_input_open()
205 	struct wm831x *wm831x = wm831x_ts->wm831x;  in wm831x_ts_input_close()
215 	synchronize_irq(wm831x_ts->data_irq);  in wm831x_ts_input_close()
216 	synchronize_irq(wm831x_ts->pd_irq);  in wm831x_ts_input_close()
219 	flush_work(&wm831x_ts->pd_data_work);  in wm831x_ts_input_close()
221 	/* If we ended up with the pen down then make sure we revert back  in wm831x_ts_input_close()
222 	 * to pen detection state for the next time we start up.  in wm831x_ts_input_close()
224 	if (wm831x_ts->pen_down) {  in wm831x_ts_input_close()
225 		disable_irq(wm831x_ts->data_irq);  in wm831x_ts_input_close()
226 		enable_irq(wm831x_ts->pd_irq);  in wm831x_ts_input_close()
227 		wm831x_ts->pen_down = false;  in wm831x_ts_input_close()
234 	struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);  in wm831x_ts_probe()
235 	struct wm831x_pdata *core_pdata = dev_get_platdata(pdev->dev.parent);  in wm831x_ts_probe()
241 		pdata = core_pdata->touch;  in wm831x_ts_probe()
243 	wm831x_ts = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ts),  in wm831x_ts_probe()
245 	input_dev = devm_input_allocate_device(&pdev->dev);  in wm831x_ts_probe()
247 		error = -ENOMEM;  in wm831x_ts_probe()
251 	wm831x_ts->wm831x = wm831x;  in wm831x_ts_probe()
252 	wm831x_ts->input_dev = input_dev;  in wm831x_ts_probe()
253 	INIT_WORK(&wm831x_ts->pd_data_work, wm831x_pd_data_work);  in wm831x_ts_probe()
259 	wm831x_ts->data_irq = wm831x_irq(wm831x,  in wm831x_ts_probe()
262 	if (pdata && pdata->data_irq)  in wm831x_ts_probe()
263 		wm831x_ts->data_irq = pdata->data_irq;  in wm831x_ts_probe()
265 	wm831x_ts->pd_irq = wm831x_irq(wm831x,  in wm831x_ts_probe()
267 	if (pdata && pdata->pd_irq)  in wm831x_ts_probe()
268 		wm831x_ts->pd_irq = pdata->pd_irq;  in wm831x_ts_probe()
271 		wm831x_ts->pressure = pdata->pressure;  in wm831x_ts_probe()
273 		wm831x_ts->pressure = true;  in wm831x_ts_probe()
276 	if (pdata && pdata->fivewire) {  in wm831x_ts_probe()
281 		WARN_ON(pdata->pressure && pdata->fivewire);  in wm831x_ts_probe()
282 		wm831x_ts->pressure = false;  in wm831x_ts_probe()
289 		switch (pdata->isel) {  in wm831x_ts_probe()
291 			dev_err(&pdev->dev, "Unsupported ISEL setting: %d\n",  in wm831x_ts_probe()
292 				pdata->isel);  in wm831x_ts_probe()
313 	if (pdata && pdata->data_irqf)  in wm831x_ts_probe()
314 		irqf = pdata->data_irqf;  in wm831x_ts_probe()
318 	error = request_threaded_irq(wm831x_ts->data_irq,  in wm831x_ts_probe()
323 		dev_err(&pdev->dev, "Failed to request data IRQ %d: %d\n",  in wm831x_ts_probe()
324 			wm831x_ts->data_irq, error);  in wm831x_ts_probe()
328 	if (pdata && pdata->pd_irqf)  in wm831x_ts_probe()
329 		irqf = pdata->pd_irqf;  in wm831x_ts_probe()
333 	error = request_threaded_irq(wm831x_ts->pd_irq,  in wm831x_ts_probe()
336 				     "Touchscreen pen down", wm831x_ts);  in wm831x_ts_probe()
338 		dev_err(&pdev->dev, "Failed to request pen down IRQ %d: %d\n",  in wm831x_ts_probe()
339 			wm831x_ts->pd_irq, error);  in wm831x_ts_probe()
343 	/* set up touch configuration */  in wm831x_ts_probe()
344 	input_dev->name = "WM831x touchscreen";  in wm831x_ts_probe()
345 	input_dev->phys = "wm831x";  in wm831x_ts_probe()
346 	input_dev->open = wm831x_ts_input_open;  in wm831x_ts_probe()
347 	input_dev->close = wm831x_ts_input_close;  in wm831x_ts_probe()
349 	__set_bit(EV_ABS, input_dev->evbit);  in wm831x_ts_probe()
350 	__set_bit(EV_KEY, input_dev->evbit);  in wm831x_ts_probe()
351 	__set_bit(BTN_TOUCH, input_dev->keybit);  in wm831x_ts_probe()
355 	if (wm831x_ts->pressure)  in wm831x_ts_probe()
359 	input_dev->dev.parent = &pdev->dev;  in wm831x_ts_probe()
369 	free_irq(wm831x_ts->pd_irq, wm831x_ts);  in wm831x_ts_probe()
371 	free_irq(wm831x_ts->data_irq, wm831x_ts);  in wm831x_ts_probe()
381 	free_irq(wm831x_ts->pd_irq, wm831x_ts);  in wm831x_ts_remove()
382 	free_irq(wm831x_ts->data_irq, wm831x_ts);  in wm831x_ts_remove()
387 		.name = "wm831x-touch",
398 MODULE_ALIAS("platform:wm831x-touch");