Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify |
| 3 | * it under the terms of the GNU General Public License version 2 as |
| 4 | * published by the Free Software Foundation. |
| 5 | * |
| 6 | * h3600 atmel micro companion support, touchscreen subdevice |
| 7 | * Author : Alessandro Gardich <gremlin@gremlin.it> |
| 8 | * Author : Dmitry Artamonow <mad_soft@inbox.ru> |
| 9 | * Author : Linus Walleij <linus.walleij@linaro.org> |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <asm/byteorder.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/interrupt.h> |
| 17 | #include <linux/pm.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/device.h> |
| 20 | #include <linux/input.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/mfd/ipaq-micro.h> |
| 24 | |
| 25 | struct touchscreen_data { |
| 26 | struct input_dev *input; |
| 27 | struct ipaq_micro *micro; |
| 28 | }; |
| 29 | |
| 30 | static void micro_ts_receive(void *data, int len, unsigned char *msg) |
| 31 | { |
| 32 | struct touchscreen_data *ts = data; |
| 33 | |
| 34 | if (len == 4) { |
| 35 | input_report_abs(ts->input, ABS_X, |
| 36 | be16_to_cpup((__be16 *) &msg[2])); |
| 37 | input_report_abs(ts->input, ABS_Y, |
| 38 | be16_to_cpup((__be16 *) &msg[0])); |
| 39 | input_report_key(ts->input, BTN_TOUCH, 1); |
| 40 | input_sync(ts->input); |
| 41 | } else if (len == 0) { |
| 42 | input_report_abs(ts->input, ABS_X, 0); |
| 43 | input_report_abs(ts->input, ABS_Y, 0); |
| 44 | input_report_key(ts->input, BTN_TOUCH, 0); |
| 45 | input_sync(ts->input); |
| 46 | } |
| 47 | } |
| 48 | |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 49 | static void micro_ts_toggle_receive(struct touchscreen_data *ts, bool enable) |
| 50 | { |
| 51 | struct ipaq_micro *micro = ts->micro; |
| 52 | |
| 53 | spin_lock_irq(µ->lock); |
| 54 | |
| 55 | if (enable) { |
| 56 | micro->ts = micro_ts_receive; |
| 57 | micro->ts_data = ts; |
| 58 | } else { |
| 59 | micro->ts = NULL; |
| 60 | micro->ts_data = NULL; |
| 61 | } |
| 62 | |
| 63 | spin_unlock_irq(&ts->micro->lock); |
| 64 | } |
| 65 | |
| 66 | static int micro_ts_open(struct input_dev *input) |
| 67 | { |
| 68 | struct touchscreen_data *ts = input_get_drvdata(input); |
| 69 | |
| 70 | micro_ts_toggle_receive(ts, true); |
| 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | static void micro_ts_close(struct input_dev *input) |
| 76 | { |
| 77 | struct touchscreen_data *ts = input_get_drvdata(input); |
| 78 | |
| 79 | micro_ts_toggle_receive(ts, false); |
| 80 | } |
| 81 | |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 82 | static int micro_ts_probe(struct platform_device *pdev) |
| 83 | { |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 84 | struct ipaq_micro *micro = dev_get_drvdata(pdev->dev.parent); |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 85 | struct touchscreen_data *ts; |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 86 | int error; |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 87 | |
| 88 | ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL); |
| 89 | if (!ts) |
| 90 | return -ENOMEM; |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 91 | |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 92 | ts->micro = micro; |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 93 | |
| 94 | ts->input = devm_input_allocate_device(&pdev->dev); |
| 95 | if (!ts->input) { |
| 96 | dev_err(&pdev->dev, "failed to allocate input device\n"); |
| 97 | return -ENOMEM; |
| 98 | } |
| 99 | |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 100 | ts->input->name = "ipaq micro ts"; |
| 101 | ts->input->open = micro_ts_open; |
| 102 | ts->input->close = micro_ts_close; |
| 103 | |
| 104 | input_set_drvdata(ts->input, ts); |
| 105 | |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 106 | input_set_capability(ts->input, EV_KEY, BTN_TOUCH); |
| 107 | input_set_capability(ts->input, EV_ABS, ABS_X); |
| 108 | input_set_capability(ts->input, EV_ABS, ABS_Y); |
| 109 | input_set_abs_params(ts->input, ABS_X, 0, 1023, 0, 0); |
| 110 | input_set_abs_params(ts->input, ABS_Y, 0, 1023, 0, 0); |
| 111 | |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 112 | error = input_register_device(ts->input); |
| 113 | if (error) { |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 114 | dev_err(&pdev->dev, "error registering touch input\n"); |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 115 | return error; |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 116 | } |
| 117 | |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 118 | platform_set_drvdata(pdev, ts); |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 119 | |
| 120 | dev_info(&pdev->dev, "iPAQ micro touchscreen\n"); |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
Jingoo Han | 02b6a58 | 2014-11-02 00:04:14 -0700 | [diff] [blame^] | 125 | static int __maybe_unused micro_ts_suspend(struct device *dev) |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 126 | { |
| 127 | struct touchscreen_data *ts = dev_get_drvdata(dev); |
| 128 | |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 129 | micro_ts_toggle_receive(ts, false); |
| 130 | |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 131 | return 0; |
| 132 | } |
| 133 | |
Jingoo Han | 02b6a58 | 2014-11-02 00:04:14 -0700 | [diff] [blame^] | 134 | static int __maybe_unused micro_ts_resume(struct device *dev) |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 135 | { |
| 136 | struct touchscreen_data *ts = dev_get_drvdata(dev); |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 137 | struct input_dev *input = ts->input; |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 138 | |
Dmitry Torokhov | f348f32 | 2014-07-23 10:03:10 -0700 | [diff] [blame] | 139 | mutex_lock(&input->mutex); |
| 140 | |
| 141 | if (input->users) |
| 142 | micro_ts_toggle_receive(ts, true); |
| 143 | |
| 144 | mutex_unlock(&input->mutex); |
| 145 | |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 146 | return 0; |
| 147 | } |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 148 | |
| 149 | static const struct dev_pm_ops micro_ts_dev_pm_ops = { |
| 150 | SET_SYSTEM_SLEEP_PM_OPS(micro_ts_suspend, micro_ts_resume) |
| 151 | }; |
| 152 | |
| 153 | static struct platform_driver micro_ts_device_driver = { |
| 154 | .driver = { |
| 155 | .name = "ipaq-micro-ts", |
| 156 | .pm = µ_ts_dev_pm_ops, |
| 157 | }, |
| 158 | .probe = micro_ts_probe, |
Dmitry Artamonow | 3ea7e55 | 2014-07-23 09:56:01 -0700 | [diff] [blame] | 159 | }; |
| 160 | module_platform_driver(micro_ts_device_driver); |
| 161 | |
| 162 | MODULE_LICENSE("GPL"); |
| 163 | MODULE_DESCRIPTION("driver for iPAQ Atmel micro touchscreen"); |
| 164 | MODULE_ALIAS("platform:ipaq-micro-ts"); |