80 static void lpc32xx_fifo_clear(struct lpc32xx_tsc *tsc)  in lpc32xx_fifo_clear()  argument
82 	while (!(tsc_readl(tsc, LPC32XX_TSC_STAT) &  in lpc32xx_fifo_clear()
84 		tsc_readl(tsc, LPC32XX_TSC_FIFO);  in lpc32xx_fifo_clear()
91 	struct lpc32xx_tsc *tsc = dev_id;  in lpc32xx_ts_interrupt()  local
92 	struct input_dev *input = tsc->dev;  in lpc32xx_ts_interrupt()
94 	tmp = tsc_readl(tsc, LPC32XX_TSC_STAT);  in lpc32xx_ts_interrupt()
98 		lpc32xx_fifo_clear(tsc);  in lpc32xx_ts_interrupt()
109 	       !(tsc_readl(tsc, LPC32XX_TSC_STAT) &  in lpc32xx_ts_interrupt()
111 		tmp = tsc_readl(tsc, LPC32XX_TSC_FIFO);  in lpc32xx_ts_interrupt()
135 static void lpc32xx_stop_tsc(struct lpc32xx_tsc *tsc)  in lpc32xx_stop_tsc()  argument
138 	tsc_writel(tsc, LPC32XX_TSC_CON,  in lpc32xx_stop_tsc()
139 		   tsc_readl(tsc, LPC32XX_TSC_CON) &  in lpc32xx_stop_tsc()
142 	clk_disable_unprepare(tsc->clk);  in lpc32xx_stop_tsc()
145 static int lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc)  in lpc32xx_setup_tsc()  argument
150 	err = clk_prepare_enable(tsc->clk);  in lpc32xx_setup_tsc()
154 	tmp = tsc_readl(tsc, LPC32XX_TSC_CON) & ~LPC32XX_TSC_ADCCON_POWER_UP;  in lpc32xx_setup_tsc()
156 	/* Set the TSC FIFO depth to 4 samples @ 10-bits per sample (max) */  in lpc32xx_setup_tsc()
160 	tsc_writel(tsc, LPC32XX_TSC_CON, tmp);  in lpc32xx_setup_tsc()
163 	tsc_writel(tsc, LPC32XX_TSC_SEL, LPC32XX_TSC_SEL_DEFVAL);  in lpc32xx_setup_tsc()
164 	tsc_writel(tsc, LPC32XX_TSC_MIN_X, LPC32XX_TSC_MIN_XY_VAL);  in lpc32xx_setup_tsc()
165 	tsc_writel(tsc, LPC32XX_TSC_MAX_X, LPC32XX_TSC_MAX_XY_VAL);  in lpc32xx_setup_tsc()
166 	tsc_writel(tsc, LPC32XX_TSC_MIN_Y, LPC32XX_TSC_MIN_XY_VAL);  in lpc32xx_setup_tsc()
167 	tsc_writel(tsc, LPC32XX_TSC_MAX_Y, LPC32XX_TSC_MAX_XY_VAL);  in lpc32xx_setup_tsc()
170 	tsc_writel(tsc, LPC32XX_TSC_AUX_UTR, 0);  in lpc32xx_setup_tsc()
171 	tsc_writel(tsc, LPC32XX_TSC_AUX_MIN, 0);  in lpc32xx_setup_tsc()
172 	tsc_writel(tsc, LPC32XX_TSC_AUX_MAX, 0);  in lpc32xx_setup_tsc()
180 	tsc_writel(tsc, LPC32XX_TSC_RTR, 0x2);  in lpc32xx_setup_tsc()
181 	tsc_writel(tsc, LPC32XX_TSC_DTR, 0x2);  in lpc32xx_setup_tsc()
182 	tsc_writel(tsc, LPC32XX_TSC_TTR, 0x10);  in lpc32xx_setup_tsc()
183 	tsc_writel(tsc, LPC32XX_TSC_DXP, 0x4);  in lpc32xx_setup_tsc()
184 	tsc_writel(tsc, LPC32XX_TSC_UTR, 88);  in lpc32xx_setup_tsc()
186 	lpc32xx_fifo_clear(tsc);  in lpc32xx_setup_tsc()
189 	tsc_writel(tsc, LPC32XX_TSC_CON, tmp | LPC32XX_TSC_ADCCON_AUTO_EN);  in lpc32xx_setup_tsc()
196 	struct lpc32xx_tsc *tsc = input_get_drvdata(dev);  in lpc32xx_ts_open()  local
198 	return lpc32xx_setup_tsc(tsc);  in lpc32xx_ts_open()
203 	struct lpc32xx_tsc *tsc = input_get_drvdata(dev);  in lpc32xx_ts_close()  local
205 	lpc32xx_stop_tsc(tsc);  in lpc32xx_ts_close()
210 	struct lpc32xx_tsc *tsc;  in lpc32xx_ts_probe()  local
229 	tsc = kzalloc(sizeof(*tsc), GFP_KERNEL);  in lpc32xx_ts_probe()
231 	if (!tsc || !input) {  in lpc32xx_ts_probe()
237 	tsc->dev = input;  in lpc32xx_ts_probe()
238 	tsc->irq = irq;  in lpc32xx_ts_probe()
243 		dev_err(&pdev->dev, "TSC registers are not free\n");  in lpc32xx_ts_probe()
248 	tsc->tsc_base = ioremap(res->start, size);  in lpc32xx_ts_probe()
249 	if (!tsc->tsc_base) {  in lpc32xx_ts_probe()
255 	tsc->clk = clk_get(&pdev->dev, NULL);  in lpc32xx_ts_probe()
256 	if (IS_ERR(tsc->clk)) {  in lpc32xx_ts_probe()
258 		error = PTR_ERR(tsc->clk);  in lpc32xx_ts_probe()
279 	input_set_drvdata(input, tsc);  in lpc32xx_ts_probe()
281 	error = request_irq(tsc->irq, lpc32xx_ts_interrupt,  in lpc32xx_ts_probe()
282 			    0, pdev->name, tsc);  in lpc32xx_ts_probe()
294 	platform_set_drvdata(pdev, tsc);  in lpc32xx_ts_probe()
300 	free_irq(tsc->irq, tsc);  in lpc32xx_ts_probe()
302 	clk_put(tsc->clk);  in lpc32xx_ts_probe()
304 	iounmap(tsc->tsc_base);  in lpc32xx_ts_probe()
309 	kfree(tsc);  in lpc32xx_ts_probe()
316 	struct lpc32xx_tsc *tsc = platform_get_drvdata(pdev);  in lpc32xx_ts_remove()  local
319 	free_irq(tsc->irq, tsc);  in lpc32xx_ts_remove()
321 	input_unregister_device(tsc->dev);  in lpc32xx_ts_remove()
323 	clk_put(tsc->clk);  in lpc32xx_ts_remove()
325 	iounmap(tsc->tsc_base);  in lpc32xx_ts_remove()
329 	kfree(tsc);  in lpc32xx_ts_remove()
337 	struct lpc32xx_tsc *tsc = dev_get_drvdata(dev);  in lpc32xx_ts_suspend()  local
338 	struct input_dev *input = tsc->dev;  in lpc32xx_ts_suspend()
343 	 * avoid calling the TSC stop and start functions as the TSC  in lpc32xx_ts_suspend()
350 			enable_irq_wake(tsc->irq);  in lpc32xx_ts_suspend()
352 			lpc32xx_stop_tsc(tsc);  in lpc32xx_ts_suspend()
362 	struct lpc32xx_tsc *tsc = dev_get_drvdata(dev);  in lpc32xx_ts_resume()  local
363 	struct input_dev *input = tsc->dev;  in lpc32xx_ts_resume()
369 			disable_irq_wake(tsc->irq);  in lpc32xx_ts_resume()
371 			lpc32xx_setup_tsc(tsc);  in lpc32xx_ts_resume()
390 	{ .compatible = "nxp,lpc3220-tsc", },
408 MODULE_DESCRIPTION("LPC32XX TSC Driver");