[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/input/touchscreen/wm831x-ts.c b/src/kernel/linux/v4.14/drivers/input/touchscreen/wm831x-ts.c
new file mode 100644
index 0000000..1db0a14
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/input/touchscreen/wm831x-ts.c
@@ -0,0 +1,405 @@
+/*
+ * Touchscreen driver for WM831x PMICs
+ *
+ * Copyright 2011 Wolfson Microelectronics plc.
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/pm.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/irq.h>
+#include <linux/mfd/wm831x/pdata.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+/*
+ * R16424 (0x4028) - Touch Control 1
+ */
+#define WM831X_TCH_ENA 0x8000 /* TCH_ENA */
+#define WM831X_TCH_CVT_ENA 0x4000 /* TCH_CVT_ENA */
+#define WM831X_TCH_SLPENA 0x1000 /* TCH_SLPENA */
+#define WM831X_TCH_Z_ENA 0x0400 /* TCH_Z_ENA */
+#define WM831X_TCH_Y_ENA 0x0200 /* TCH_Y_ENA */
+#define WM831X_TCH_X_ENA 0x0100 /* TCH_X_ENA */
+#define WM831X_TCH_DELAY_MASK 0x00E0 /* TCH_DELAY - [7:5] */
+#define WM831X_TCH_DELAY_SHIFT 5 /* TCH_DELAY - [7:5] */
+#define WM831X_TCH_DELAY_WIDTH 3 /* TCH_DELAY - [7:5] */
+#define WM831X_TCH_RATE_MASK 0x001F /* TCH_RATE - [4:0] */
+#define WM831X_TCH_RATE_SHIFT 0 /* TCH_RATE - [4:0] */
+#define WM831X_TCH_RATE_WIDTH 5 /* TCH_RATE - [4:0] */
+
+/*
+ * R16425 (0x4029) - Touch Control 2
+ */
+#define WM831X_TCH_PD_WK 0x2000 /* TCH_PD_WK */
+#define WM831X_TCH_5WIRE 0x1000 /* TCH_5WIRE */
+#define WM831X_TCH_PDONLY 0x0800 /* TCH_PDONLY */
+#define WM831X_TCH_ISEL 0x0100 /* TCH_ISEL */
+#define WM831X_TCH_RPU_MASK 0x000F /* TCH_RPU - [3:0] */
+#define WM831X_TCH_RPU_SHIFT 0 /* TCH_RPU - [3:0] */
+#define WM831X_TCH_RPU_WIDTH 4 /* TCH_RPU - [3:0] */
+
+/*
+ * R16426-8 (0x402A-C) - Touch Data X/Y/X
+ */
+#define WM831X_TCH_PD 0x8000 /* TCH_PD1 */
+#define WM831X_TCH_DATA_MASK 0x0FFF /* TCH_DATA - [11:0] */
+#define WM831X_TCH_DATA_SHIFT 0 /* TCH_DATA - [11:0] */
+#define WM831X_TCH_DATA_WIDTH 12 /* TCH_DATA - [11:0] */
+
+struct wm831x_ts {
+ struct input_dev *input_dev;
+ struct wm831x *wm831x;
+ unsigned int data_irq;
+ unsigned int pd_irq;
+ bool pressure;
+ bool pen_down;
+ struct work_struct pd_data_work;
+};
+
+static void wm831x_pd_data_work(struct work_struct *work)
+{
+ struct wm831x_ts *wm831x_ts =
+ container_of(work, struct wm831x_ts, pd_data_work);
+
+ if (wm831x_ts->pen_down) {
+ enable_irq(wm831x_ts->data_irq);
+ dev_dbg(wm831x_ts->wm831x->dev, "IRQ PD->DATA done\n");
+ } else {
+ enable_irq(wm831x_ts->pd_irq);
+ dev_dbg(wm831x_ts->wm831x->dev, "IRQ DATA->PD done\n");
+ }
+}
+
+static irqreturn_t wm831x_ts_data_irq(int irq, void *irq_data)
+{
+ struct wm831x_ts *wm831x_ts = irq_data;
+ struct wm831x *wm831x = wm831x_ts->wm831x;
+ static int data_types[] = { ABS_X, ABS_Y, ABS_PRESSURE };
+ u16 data[3];
+ int count;
+ int i, ret;
+
+ if (wm831x_ts->pressure)
+ count = 3;
+ else
+ count = 2;
+
+ wm831x_set_bits(wm831x, WM831X_INTERRUPT_STATUS_1,
+ WM831X_TCHDATA_EINT, WM831X_TCHDATA_EINT);
+
+ ret = wm831x_bulk_read(wm831x, WM831X_TOUCH_DATA_X, count,
+ data);
+ if (ret != 0) {
+ dev_err(wm831x->dev, "Failed to read touch data: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ /*
+ * We get a pen down reading on every reading, report pen up if any
+ * individual reading does so.
+ */
+ wm831x_ts->pen_down = true;
+ for (i = 0; i < count; i++) {
+ if (!(data[i] & WM831X_TCH_PD)) {
+ wm831x_ts->pen_down = false;
+ continue;
+ }
+ input_report_abs(wm831x_ts->input_dev, data_types[i],
+ data[i] & WM831X_TCH_DATA_MASK);
+ }
+
+ if (!wm831x_ts->pen_down) {
+ /* Switch from data to pen down */
+ dev_dbg(wm831x->dev, "IRQ DATA->PD\n");
+
+ disable_irq_nosync(wm831x_ts->data_irq);
+
+ /* Don't need data any more */
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA |
+ WM831X_TCH_Z_ENA, 0);
+
+ /* Flush any final samples that arrived while reading */
+ wm831x_set_bits(wm831x, WM831X_INTERRUPT_STATUS_1,
+ WM831X_TCHDATA_EINT, WM831X_TCHDATA_EINT);
+
+ wm831x_bulk_read(wm831x, WM831X_TOUCH_DATA_X, count, data);
+
+ if (wm831x_ts->pressure)
+ input_report_abs(wm831x_ts->input_dev,
+ ABS_PRESSURE, 0);
+
+ input_report_key(wm831x_ts->input_dev, BTN_TOUCH, 0);
+
+ schedule_work(&wm831x_ts->pd_data_work);
+ } else {
+ input_report_key(wm831x_ts->input_dev, BTN_TOUCH, 1);
+ }
+
+ input_sync(wm831x_ts->input_dev);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t wm831x_ts_pen_down_irq(int irq, void *irq_data)
+{
+ struct wm831x_ts *wm831x_ts = irq_data;
+ struct wm831x *wm831x = wm831x_ts->wm831x;
+ int ena = 0;
+
+ if (wm831x_ts->pen_down)
+ return IRQ_HANDLED;
+
+ disable_irq_nosync(wm831x_ts->pd_irq);
+
+ /* Start collecting data */
+ if (wm831x_ts->pressure)
+ ena |= WM831X_TCH_Z_ENA;
+
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA | WM831X_TCH_Z_ENA,
+ WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA | ena);
+
+ wm831x_set_bits(wm831x, WM831X_INTERRUPT_STATUS_1,
+ WM831X_TCHPD_EINT, WM831X_TCHPD_EINT);
+
+ wm831x_ts->pen_down = true;
+
+ /* Switch from pen down to data */
+ dev_dbg(wm831x->dev, "IRQ PD->DATA\n");
+ schedule_work(&wm831x_ts->pd_data_work);
+
+ return IRQ_HANDLED;
+}
+
+static int wm831x_ts_input_open(struct input_dev *idev)
+{
+ struct wm831x_ts *wm831x_ts = input_get_drvdata(idev);
+ struct wm831x *wm831x = wm831x_ts->wm831x;
+
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_ENA | WM831X_TCH_CVT_ENA |
+ WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA |
+ WM831X_TCH_Z_ENA, WM831X_TCH_ENA);
+
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_CVT_ENA, WM831X_TCH_CVT_ENA);
+
+ return 0;
+}
+
+static void wm831x_ts_input_close(struct input_dev *idev)
+{
+ struct wm831x_ts *wm831x_ts = input_get_drvdata(idev);
+ struct wm831x *wm831x = wm831x_ts->wm831x;
+
+ /* Shut the controller down, disabling all other functionality too */
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_ENA | WM831X_TCH_X_ENA |
+ WM831X_TCH_Y_ENA | WM831X_TCH_Z_ENA, 0);
+
+ /* Make sure any pending IRQs are done, the above will prevent
+ * new ones firing.
+ */
+ synchronize_irq(wm831x_ts->data_irq);
+ synchronize_irq(wm831x_ts->pd_irq);
+
+ /* Make sure the IRQ completion work is quiesced */
+ flush_work(&wm831x_ts->pd_data_work);
+
+ /* If we ended up with the pen down then make sure we revert back
+ * to pen detection state for the next time we start up.
+ */
+ if (wm831x_ts->pen_down) {
+ disable_irq(wm831x_ts->data_irq);
+ enable_irq(wm831x_ts->pd_irq);
+ wm831x_ts->pen_down = false;
+ }
+}
+
+static int wm831x_ts_probe(struct platform_device *pdev)
+{
+ struct wm831x_ts *wm831x_ts;
+ struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
+ struct wm831x_pdata *core_pdata = dev_get_platdata(pdev->dev.parent);
+ struct wm831x_touch_pdata *pdata = NULL;
+ struct input_dev *input_dev;
+ int error, irqf;
+
+ if (core_pdata)
+ pdata = core_pdata->touch;
+
+ wm831x_ts = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ts),
+ GFP_KERNEL);
+ input_dev = devm_input_allocate_device(&pdev->dev);
+ if (!wm831x_ts || !input_dev) {
+ error = -ENOMEM;
+ goto err_alloc;
+ }
+
+ wm831x_ts->wm831x = wm831x;
+ wm831x_ts->input_dev = input_dev;
+ INIT_WORK(&wm831x_ts->pd_data_work, wm831x_pd_data_work);
+
+ /*
+ * If we have a direct IRQ use it, otherwise use the interrupt
+ * from the WM831x IRQ controller.
+ */
+ wm831x_ts->data_irq = wm831x_irq(wm831x,
+ platform_get_irq_byname(pdev,
+ "TCHDATA"));
+ if (pdata && pdata->data_irq)
+ wm831x_ts->data_irq = pdata->data_irq;
+
+ wm831x_ts->pd_irq = wm831x_irq(wm831x,
+ platform_get_irq_byname(pdev, "TCHPD"));
+ if (pdata && pdata->pd_irq)
+ wm831x_ts->pd_irq = pdata->pd_irq;
+
+ if (pdata)
+ wm831x_ts->pressure = pdata->pressure;
+ else
+ wm831x_ts->pressure = true;
+
+ /* Five wire touchscreens can't report pressure */
+ if (pdata && pdata->fivewire) {
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_5WIRE, WM831X_TCH_5WIRE);
+
+ /* Pressure measurements are not possible for five wire mode */
+ WARN_ON(pdata->pressure && pdata->fivewire);
+ wm831x_ts->pressure = false;
+ } else {
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_5WIRE, 0);
+ }
+
+ if (pdata) {
+ switch (pdata->isel) {
+ default:
+ dev_err(&pdev->dev, "Unsupported ISEL setting: %d\n",
+ pdata->isel);
+ /* Fall through */
+ case 200:
+ case 0:
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_ISEL, 0);
+ break;
+ case 400:
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_ISEL, WM831X_TCH_ISEL);
+ break;
+ }
+ }
+
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
+ WM831X_TCH_PDONLY, 0);
+
+ /* Default to 96 samples/sec */
+ wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1,
+ WM831X_TCH_RATE_MASK, 6);
+
+ if (pdata && pdata->data_irqf)
+ irqf = pdata->data_irqf;
+ else
+ irqf = IRQF_TRIGGER_HIGH;
+
+ error = request_threaded_irq(wm831x_ts->data_irq,
+ NULL, wm831x_ts_data_irq,
+ irqf | IRQF_ONESHOT,
+ "Touchscreen data", wm831x_ts);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to request data IRQ %d: %d\n",
+ wm831x_ts->data_irq, error);
+ goto err_alloc;
+ }
+ disable_irq(wm831x_ts->data_irq);
+
+ if (pdata && pdata->pd_irqf)
+ irqf = pdata->pd_irqf;
+ else
+ irqf = IRQF_TRIGGER_HIGH;
+
+ error = request_threaded_irq(wm831x_ts->pd_irq,
+ NULL, wm831x_ts_pen_down_irq,
+ irqf | IRQF_ONESHOT,
+ "Touchscreen pen down", wm831x_ts);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to request pen down IRQ %d: %d\n",
+ wm831x_ts->pd_irq, error);
+ goto err_data_irq;
+ }
+
+ /* set up touch configuration */
+ input_dev->name = "WM831x touchscreen";
+ input_dev->phys = "wm831x";
+ input_dev->open = wm831x_ts_input_open;
+ input_dev->close = wm831x_ts_input_close;
+
+ __set_bit(EV_ABS, input_dev->evbit);
+ __set_bit(EV_KEY, input_dev->evbit);
+ __set_bit(BTN_TOUCH, input_dev->keybit);
+
+ input_set_abs_params(input_dev, ABS_X, 0, 4095, 5, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, 4095, 5, 0);
+ if (wm831x_ts->pressure)
+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, 4095, 5, 0);
+
+ input_set_drvdata(input_dev, wm831x_ts);
+ input_dev->dev.parent = &pdev->dev;
+
+ error = input_register_device(input_dev);
+ if (error)
+ goto err_pd_irq;
+
+ platform_set_drvdata(pdev, wm831x_ts);
+ return 0;
+
+err_pd_irq:
+ free_irq(wm831x_ts->pd_irq, wm831x_ts);
+err_data_irq:
+ free_irq(wm831x_ts->data_irq, wm831x_ts);
+err_alloc:
+
+ return error;
+}
+
+static int wm831x_ts_remove(struct platform_device *pdev)
+{
+ struct wm831x_ts *wm831x_ts = platform_get_drvdata(pdev);
+
+ free_irq(wm831x_ts->pd_irq, wm831x_ts);
+ free_irq(wm831x_ts->data_irq, wm831x_ts);
+
+ return 0;
+}
+
+static struct platform_driver wm831x_ts_driver = {
+ .driver = {
+ .name = "wm831x-touch",
+ },
+ .probe = wm831x_ts_probe,
+ .remove = wm831x_ts_remove,
+};
+module_platform_driver(wm831x_ts_driver);
+
+/* Module information */
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("WM831x PMIC touchscreen driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm831x-touch");