70 static int titsc_config_wires(struct titsc *ts_dev)  in titsc_config_wires()  argument
81 		analog_line[i] = (ts_dev->config_inp[i] & 0xF0) >> 4;  in titsc_config_wires()
82 		wire_order[i] = ts_dev->config_inp[i] & 0x0F;  in titsc_config_wires()
100 			ts_dev->bit_xp = bit_cfg;  in titsc_config_wires()
101 			ts_dev->inp_xp = an_line;  in titsc_config_wires()
105 			ts_dev->bit_xn = bit_cfg;  in titsc_config_wires()
106 			ts_dev->inp_xn = an_line;  in titsc_config_wires()
110 			ts_dev->bit_yp = bit_cfg;  in titsc_config_wires()
111 			ts_dev->inp_yp = an_line;  in titsc_config_wires()
114 			ts_dev->bit_yn = bit_cfg;  in titsc_config_wires()
115 			ts_dev->inp_yn = an_line;  in titsc_config_wires()
122 static void titsc_step_config(struct titsc *ts_dev)  in titsc_step_config()  argument
130 			STEPCONFIG_AVG_16 | ts_dev->bit_xp;  in titsc_step_config()
131 	switch (ts_dev->wires) {  in titsc_step_config()
133 		config |= STEPCONFIG_INP(ts_dev->inp_yp) | ts_dev->bit_xn;  in titsc_step_config()
136 		config |= ts_dev->bit_yn |  in titsc_step_config()
137 				STEPCONFIG_INP_AN4 | ts_dev->bit_xn |  in titsc_step_config()
138 				ts_dev->bit_yp;  in titsc_step_config()
141 		config |= STEPCONFIG_INP(ts_dev->inp_yp) | ts_dev->bit_xn;  in titsc_step_config()
145 	tsc_steps = ts_dev->coordinate_readouts * 2 + 2;  in titsc_step_config()
149 	for (i = end_step - ts_dev->coordinate_readouts; i < end_step; i++) {  in titsc_step_config()
150 		titsc_writel(ts_dev, REG_STEPCONFIG(i), config);  in titsc_step_config()
151 		titsc_writel(ts_dev, REG_STEPDELAY(i), STEPCONFIG_OPENDLY);  in titsc_step_config()
156 			STEPCONFIG_AVG_16 | ts_dev->bit_yn |  in titsc_step_config()
158 	switch (ts_dev->wires) {  in titsc_step_config()
160 		config |= ts_dev->bit_yp | STEPCONFIG_INP(ts_dev->inp_xp);  in titsc_step_config()
163 		config |= ts_dev->bit_xp | STEPCONFIG_INP_AN4 |  in titsc_step_config()
164 				ts_dev->bit_xn | ts_dev->bit_yp;  in titsc_step_config()
167 		config |= ts_dev->bit_yp | STEPCONFIG_INP(ts_dev->inp_xp);  in titsc_step_config()
172 	end_step = first_step + ts_dev->coordinate_readouts;  in titsc_step_config()
174 		titsc_writel(ts_dev, REG_STEPCONFIG(i), config);  in titsc_step_config()
175 		titsc_writel(ts_dev, REG_STEPDELAY(i), STEPCONFIG_OPENDLY);  in titsc_step_config()
180 	config = titsc_readl(ts_dev, REG_IDLECONFIG);  in titsc_step_config()
181 	titsc_writel(ts_dev, REG_CHARGECONFIG, config);  in titsc_step_config()
182 	titsc_writel(ts_dev, REG_CHARGEDELAY, ts_dev->charge_delay);  in titsc_step_config()
186 			STEPCONFIG_AVG_16 | ts_dev->bit_yp |  in titsc_step_config()
187 			ts_dev->bit_xn | STEPCONFIG_INM_ADCREFM |  in titsc_step_config()
188 			STEPCONFIG_INP(ts_dev->inp_xp);  in titsc_step_config()
189 	titsc_writel(ts_dev, REG_STEPCONFIG(end_step), config);  in titsc_step_config()
190 	titsc_writel(ts_dev, REG_STEPDELAY(end_step),  in titsc_step_config()
194 	config |= STEPCONFIG_INP(ts_dev->inp_yn);  in titsc_step_config()
195 	titsc_writel(ts_dev, REG_STEPCONFIG(end_step), config);  in titsc_step_config()
196 	titsc_writel(ts_dev, REG_STEPDELAY(end_step),  in titsc_step_config()
204 	ts_dev->step_mask = stepenable;  in titsc_step_config()
205 	am335x_tsc_se_set_cache(ts_dev->mfd_tscadc, ts_dev->step_mask);  in titsc_step_config()
213 static void titsc_read_coordinates(struct titsc *ts_dev,  in titsc_read_coordinates()  argument
218 	unsigned int creads = ts_dev->coordinate_readouts;  in titsc_read_coordinates()
221 		yvals[i] = titsc_readl(ts_dev, REG_FIFO0);  in titsc_read_coordinates()
225 	*z1 = titsc_readl(ts_dev, REG_FIFO0);  in titsc_read_coordinates()
227 	*z2 = titsc_readl(ts_dev, REG_FIFO0);  in titsc_read_coordinates()
231 		xvals[i] = titsc_readl(ts_dev, REG_FIFO0);  in titsc_read_coordinates()
267 	struct titsc *ts_dev = dev;  in titsc_irq()  local
268 	struct input_dev *input_dev = ts_dev->input;  in titsc_irq()
273 	status = titsc_readl(ts_dev, REG_RAWIRQSTATUS);  in titsc_irq()
275 		ts_dev->pen_down = true;  in titsc_irq()
276 		titsc_writel(ts_dev, REG_IRQWAKEUP, 0x00);  in titsc_irq()
277 		titsc_writel(ts_dev, REG_IRQCLR, IRQENB_HW_PEN);  in titsc_irq()
282 		fsm = titsc_readl(ts_dev, REG_ADCFSM);  in titsc_irq()
284 			ts_dev->pen_down = false;  in titsc_irq()
289 			ts_dev->pen_down = true;  in titsc_irq()
303 		titsc_read_coordinates(ts_dev, &x, &y, &z1, &z2);  in titsc_irq()
305 		if (ts_dev->pen_down && z1 != 0 && z2 != 0) {  in titsc_irq()
313 			z *= ts_dev->x_plate_resistance;  in titsc_irq()
328 		titsc_writel(ts_dev, REG_IRQSTATUS, irqclr);  in titsc_irq()
330 			am335x_tsc_se_set_cache(ts_dev->mfd_tscadc,  in titsc_irq()
331 						ts_dev->step_mask);  in titsc_irq()
338 					struct titsc *ts_dev)  in titsc_parse_dt()  argument
346 	err = of_property_read_u32(node, "ti,wires", &ts_dev->wires);  in titsc_parse_dt()
349 	switch (ts_dev->wires) {  in titsc_parse_dt()
359 			&ts_dev->x_plate_resistance);  in titsc_parse_dt()
368 			&ts_dev->coordinate_readouts);  in titsc_parse_dt()
372 				&ts_dev->coordinate_readouts);  in titsc_parse_dt()
378 	if (ts_dev->coordinate_readouts <= 0) {  in titsc_parse_dt()
381 		ts_dev->coordinate_readouts = 5;  in titsc_parse_dt()
385 				   &ts_dev->charge_delay);  in titsc_parse_dt()
391 		ts_dev->charge_delay = CHARGEDLY_OPENDLY;  in titsc_parse_dt()
396 			ts_dev->config_inp, ARRAY_SIZE(ts_dev->config_inp));  in titsc_parse_dt()
405 	struct titsc *ts_dev;  in titsc_probe()  local
411 	ts_dev = kzalloc(sizeof(struct titsc), GFP_KERNEL);  in titsc_probe()
413 	if (!ts_dev || !input_dev) {  in titsc_probe()
419 	tscadc_dev->tsc = ts_dev;  in titsc_probe()
420 	ts_dev->mfd_tscadc = tscadc_dev;  in titsc_probe()
421 	ts_dev->input = input_dev;  in titsc_probe()
422 	ts_dev->irq = tscadc_dev->irq;  in titsc_probe()
424 	err = titsc_parse_dt(pdev, ts_dev);  in titsc_probe()
430 	err = request_irq(ts_dev->irq, titsc_irq,  in titsc_probe()
431 			  IRQF_SHARED, pdev->dev.driver->name, ts_dev);  in titsc_probe()
437 	titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO0THRES);  in titsc_probe()
438 	titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_EOS);  in titsc_probe()
439 	err = titsc_config_wires(ts_dev);  in titsc_probe()
444 	titsc_step_config(ts_dev);  in titsc_probe()
445 	titsc_writel(ts_dev, REG_FIFO0THR,  in titsc_probe()
446 			ts_dev->coordinate_readouts * 2 + 2 - 1);  in titsc_probe()
463 	platform_set_drvdata(pdev, ts_dev);  in titsc_probe()
467 	free_irq(ts_dev->irq, ts_dev);  in titsc_probe()
470 	kfree(ts_dev);  in titsc_probe()
476 	struct titsc *ts_dev = platform_get_drvdata(pdev);  in titsc_remove()  local
479 	free_irq(ts_dev->irq, ts_dev);  in titsc_remove()
482 	steps = 2 * ts_dev->coordinate_readouts + 2;  in titsc_remove()
484 	am335x_tsc_se_clr(ts_dev->mfd_tscadc, steps);  in titsc_remove()
486 	input_unregister_device(ts_dev->input);  in titsc_remove()
488 	kfree(ts_dev);  in titsc_remove()
495 	struct titsc *ts_dev = dev_get_drvdata(dev);  in titsc_suspend()  local
501 		idle = titsc_readl(ts_dev, REG_IRQENABLE);  in titsc_suspend()
502 		titsc_writel(ts_dev, REG_IRQENABLE,  in titsc_suspend()
504 		titsc_writel(ts_dev, REG_IRQWAKEUP, IRQWKUP_ENB);  in titsc_suspend()
511 	struct titsc *ts_dev = dev_get_drvdata(dev);  in titsc_resume()  local
516 		titsc_writel(ts_dev, REG_IRQWAKEUP,  in titsc_resume()
518 		titsc_writel(ts_dev, REG_IRQCLR, IRQENB_HW_PEN);  in titsc_resume()
520 	titsc_step_config(ts_dev);  in titsc_resume()
521 	titsc_writel(ts_dev, REG_FIFO0THR,  in titsc_resume()
522 			ts_dev->coordinate_readouts * 2 + 2 - 1);  in titsc_resume()