Kristoffer Ericson | 5637f02 | 2007-09-26 00:02:56 -0400 | [diff] [blame] | 1 | /* |
| 2 | * drivers/input/touchscreen/jornada720_ts.c |
| 3 | * |
| 4 | * Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com> |
| 5 | * |
| 6 | * Copyright (C) 2006 Filip Zyzniewski <filip.zyzniewski@tefnet.pl> |
| 7 | * based on HP Jornada 56x touchscreen driver by Alex Lange <chicken@handhelds.org> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * HP Jornada 710/720/729 Touchscreen Driver |
| 14 | */ |
| 15 | |
| 16 | #include <linux/platform_device.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/input.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 21 | #include <linux/slab.h> |
Kristoffer Ericson | 5637f02 | 2007-09-26 00:02:56 -0400 | [diff] [blame] | 22 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 23 | #include <mach/hardware.h> |
| 24 | #include <mach/jornada720.h> |
Kristoffer Ericson | 5637f02 | 2007-09-26 00:02:56 -0400 | [diff] [blame] | 25 | |
| 26 | MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>"); |
| 27 | MODULE_DESCRIPTION("HP Jornada 710/720/728 touchscreen driver"); |
Al Viro | 839cd31 | 2008-05-21 06:32:11 +0100 | [diff] [blame] | 28 | MODULE_LICENSE("GPL v2"); |
Kristoffer Ericson | 5637f02 | 2007-09-26 00:02:56 -0400 | [diff] [blame] | 29 | |
| 30 | struct jornada_ts { |
| 31 | struct input_dev *dev; |
| 32 | int x_data[4]; /* X sample values */ |
| 33 | int y_data[4]; /* Y sample values */ |
| 34 | }; |
| 35 | |
| 36 | static void jornada720_ts_collect_data(struct jornada_ts *jornada_ts) |
| 37 | { |
| 38 | |
| 39 | /* 3 low word X samples */ |
| 40 | jornada_ts->x_data[0] = jornada_ssp_byte(TXDUMMY); |
| 41 | jornada_ts->x_data[1] = jornada_ssp_byte(TXDUMMY); |
| 42 | jornada_ts->x_data[2] = jornada_ssp_byte(TXDUMMY); |
| 43 | |
| 44 | /* 3 low word Y samples */ |
| 45 | jornada_ts->y_data[0] = jornada_ssp_byte(TXDUMMY); |
| 46 | jornada_ts->y_data[1] = jornada_ssp_byte(TXDUMMY); |
| 47 | jornada_ts->y_data[2] = jornada_ssp_byte(TXDUMMY); |
| 48 | |
| 49 | /* combined x samples bits */ |
| 50 | jornada_ts->x_data[3] = jornada_ssp_byte(TXDUMMY); |
| 51 | |
| 52 | /* combined y samples bits */ |
| 53 | jornada_ts->y_data[3] = jornada_ssp_byte(TXDUMMY); |
| 54 | } |
| 55 | |
| 56 | static int jornada720_ts_average(int coords[4]) |
| 57 | { |
| 58 | int coord, high_bits = coords[3]; |
| 59 | |
| 60 | coord = coords[0] | ((high_bits & 0x03) << 8); |
| 61 | coord += coords[1] | ((high_bits & 0x0c) << 6); |
| 62 | coord += coords[2] | ((high_bits & 0x30) << 4); |
| 63 | |
| 64 | return coord / 3; |
| 65 | } |
| 66 | |
| 67 | static irqreturn_t jornada720_ts_interrupt(int irq, void *dev_id) |
| 68 | { |
| 69 | struct platform_device *pdev = dev_id; |
| 70 | struct jornada_ts *jornada_ts = platform_get_drvdata(pdev); |
| 71 | struct input_dev *input = jornada_ts->dev; |
| 72 | int x, y; |
| 73 | |
| 74 | /* If GPIO_GPIO9 is set to high then report pen up */ |
| 75 | if (GPLR & GPIO_GPIO(9)) { |
| 76 | input_report_key(input, BTN_TOUCH, 0); |
| 77 | input_sync(input); |
| 78 | } else { |
| 79 | jornada_ssp_start(); |
| 80 | |
| 81 | /* proper reply to request is always TXDUMMY */ |
| 82 | if (jornada_ssp_inout(GETTOUCHSAMPLES) == TXDUMMY) { |
| 83 | jornada720_ts_collect_data(jornada_ts); |
| 84 | |
| 85 | x = jornada720_ts_average(jornada_ts->x_data); |
| 86 | y = jornada720_ts_average(jornada_ts->y_data); |
| 87 | |
| 88 | input_report_key(input, BTN_TOUCH, 1); |
| 89 | input_report_abs(input, ABS_X, x); |
| 90 | input_report_abs(input, ABS_Y, y); |
| 91 | input_sync(input); |
| 92 | } |
| 93 | |
| 94 | jornada_ssp_end(); |
| 95 | } |
| 96 | |
| 97 | return IRQ_HANDLED; |
| 98 | } |
| 99 | |
| 100 | static int __devinit jornada720_ts_probe(struct platform_device *pdev) |
| 101 | { |
| 102 | struct jornada_ts *jornada_ts; |
| 103 | struct input_dev *input_dev; |
| 104 | int error; |
| 105 | |
| 106 | jornada_ts = kzalloc(sizeof(struct jornada_ts), GFP_KERNEL); |
| 107 | input_dev = input_allocate_device(); |
| 108 | |
| 109 | if (!jornada_ts || !input_dev) { |
| 110 | error = -ENOMEM; |
| 111 | goto fail1; |
| 112 | } |
| 113 | |
| 114 | platform_set_drvdata(pdev, jornada_ts); |
| 115 | |
| 116 | jornada_ts->dev = input_dev; |
| 117 | |
| 118 | input_dev->name = "HP Jornada 7xx Touchscreen"; |
| 119 | input_dev->phys = "jornadats/input0"; |
| 120 | input_dev->id.bustype = BUS_HOST; |
| 121 | input_dev->dev.parent = &pdev->dev; |
| 122 | |
Kristoffer Ericson | 1577e4b | 2008-09-16 14:19:25 -0400 | [diff] [blame] | 123 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
| 124 | input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); |
Kristoffer Ericson | 5637f02 | 2007-09-26 00:02:56 -0400 | [diff] [blame] | 125 | input_set_abs_params(input_dev, ABS_X, 270, 3900, 0, 0); |
| 126 | input_set_abs_params(input_dev, ABS_Y, 180, 3700, 0, 0); |
| 127 | |
| 128 | error = request_irq(IRQ_GPIO9, |
| 129 | jornada720_ts_interrupt, |
Yong Zhang | ec4665c | 2011-09-07 14:04:16 -0700 | [diff] [blame] | 130 | IRQF_TRIGGER_RISING, |
Kristoffer Ericson | 5637f02 | 2007-09-26 00:02:56 -0400 | [diff] [blame] | 131 | "HP7XX Touchscreen driver", pdev); |
| 132 | if (error) { |
| 133 | printk(KERN_INFO "HP7XX TS : Unable to acquire irq!\n"); |
| 134 | goto fail1; |
| 135 | } |
| 136 | |
| 137 | error = input_register_device(jornada_ts->dev); |
| 138 | if (error) |
| 139 | goto fail2; |
| 140 | |
| 141 | return 0; |
| 142 | |
| 143 | fail2: |
| 144 | free_irq(IRQ_GPIO9, pdev); |
| 145 | fail1: |
| 146 | platform_set_drvdata(pdev, NULL); |
| 147 | input_free_device(input_dev); |
| 148 | kfree(jornada_ts); |
| 149 | return error; |
| 150 | } |
| 151 | |
| 152 | static int __devexit jornada720_ts_remove(struct platform_device *pdev) |
| 153 | { |
| 154 | struct jornada_ts *jornada_ts = platform_get_drvdata(pdev); |
| 155 | |
| 156 | free_irq(IRQ_GPIO9, pdev); |
| 157 | platform_set_drvdata(pdev, NULL); |
| 158 | input_unregister_device(jornada_ts->dev); |
| 159 | kfree(jornada_ts); |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
Kay Sievers | d7b5247 | 2008-04-18 00:24:42 -0400 | [diff] [blame] | 164 | /* work with hotplug and coldplug */ |
| 165 | MODULE_ALIAS("platform:jornada_ts"); |
| 166 | |
Kristoffer Ericson | 5637f02 | 2007-09-26 00:02:56 -0400 | [diff] [blame] | 167 | static struct platform_driver jornada720_ts_driver = { |
| 168 | .probe = jornada720_ts_probe, |
| 169 | .remove = __devexit_p(jornada720_ts_remove), |
| 170 | .driver = { |
| 171 | .name = "jornada_ts", |
Kay Sievers | d7b5247 | 2008-04-18 00:24:42 -0400 | [diff] [blame] | 172 | .owner = THIS_MODULE, |
Kristoffer Ericson | 5637f02 | 2007-09-26 00:02:56 -0400 | [diff] [blame] | 173 | }, |
| 174 | }; |
JJ Ding | cdcc96e | 2011-11-29 11:14:13 -0800 | [diff] [blame] | 175 | module_platform_driver(jornada720_ts_driver); |