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1 /* 1 /*
2 * drivers/input/touchscreen/jornada720_ts.c 2 * drivers/input/touchscreen/jornada720_ts.c
3 * 3 *
4 * Copyright (C) 2007 Kristoffer Ericson <Kris 4 * Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
5 * 5 *
6 * Copyright (C) 2006 Filip Zyzniewski <filip 6 * Copyright (C) 2006 Filip Zyzniewski <filip.zyzniewski@tefnet.pl>
7 * based on HP Jornada 56x touchscreen driver 7 * based on HP Jornada 56x touchscreen driver by Alex Lange <chicken@handhelds.org>
8 * 8 *
9 * This program is free software; you can redi 9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Publi 10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation. 11 * published by the Free Software Foundation.
12 * 12 *
13 * HP Jornada 710/720/729 Touchscreen Driver 13 * HP Jornada 710/720/729 Touchscreen Driver
14 */ 14 */
15 15
16 #include <linux/platform_device.h> 16 #include <linux/platform_device.h>
17 #include <linux/init.h> 17 #include <linux/init.h>
18 #include <linux/input.h> 18 #include <linux/input.h>
19 #include <linux/interrupt.h> 19 #include <linux/interrupt.h>
20 #include <linux/module.h> 20 #include <linux/module.h>
21 21
22 #include <asm/hardware.h> !! 22 #include <mach/hardware.h>
23 #include <asm/arch/jornada720.h> !! 23 #include <mach/jornada720.h>
24 24
25 MODULE_AUTHOR("Kristoffer Ericson <kristoffer. 25 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
26 MODULE_DESCRIPTION("HP Jornada 710/720/728 tou 26 MODULE_DESCRIPTION("HP Jornada 710/720/728 touchscreen driver");
27 MODULE_LICENSE("GPLv2"); !! 27 MODULE_LICENSE("GPL v2");
28 28
29 struct jornada_ts { 29 struct jornada_ts {
30 struct input_dev *dev; 30 struct input_dev *dev;
31 int x_data[4]; /* X sample va 31 int x_data[4]; /* X sample values */
32 int y_data[4]; /* Y sample va 32 int y_data[4]; /* Y sample values */
33 }; 33 };
34 34
35 static void jornada720_ts_collect_data(struct 35 static void jornada720_ts_collect_data(struct jornada_ts *jornada_ts)
36 { 36 {
37 37
38 /* 3 low word X samples */ 38 /* 3 low word X samples */
39 jornada_ts->x_data[0] = jornada_ssp_byte(T 39 jornada_ts->x_data[0] = jornada_ssp_byte(TXDUMMY);
40 jornada_ts->x_data[1] = jornada_ssp_byte(T 40 jornada_ts->x_data[1] = jornada_ssp_byte(TXDUMMY);
41 jornada_ts->x_data[2] = jornada_ssp_byte(T 41 jornada_ts->x_data[2] = jornada_ssp_byte(TXDUMMY);
42 42
43 /* 3 low word Y samples */ 43 /* 3 low word Y samples */
44 jornada_ts->y_data[0] = jornada_ssp_byte(T 44 jornada_ts->y_data[0] = jornada_ssp_byte(TXDUMMY);
45 jornada_ts->y_data[1] = jornada_ssp_byte(T 45 jornada_ts->y_data[1] = jornada_ssp_byte(TXDUMMY);
46 jornada_ts->y_data[2] = jornada_ssp_byte(T 46 jornada_ts->y_data[2] = jornada_ssp_byte(TXDUMMY);
47 47
48 /* combined x samples bits */ 48 /* combined x samples bits */
49 jornada_ts->x_data[3] = jornada_ssp_byte(T 49 jornada_ts->x_data[3] = jornada_ssp_byte(TXDUMMY);
50 50
51 /* combined y samples bits */ 51 /* combined y samples bits */
52 jornada_ts->y_data[3] = jornada_ssp_byte(T 52 jornada_ts->y_data[3] = jornada_ssp_byte(TXDUMMY);
53 } 53 }
54 54
55 static int jornada720_ts_average(int coords[4] 55 static int jornada720_ts_average(int coords[4])
56 { 56 {
57 int coord, high_bits = coords[3]; 57 int coord, high_bits = coords[3];
58 58
59 coord = coords[0] | ((high_bits & 0x0 59 coord = coords[0] | ((high_bits & 0x03) << 8);
60 coord += coords[1] | ((high_bits & 0x0 60 coord += coords[1] | ((high_bits & 0x0c) << 6);
61 coord += coords[2] | ((high_bits & 0x3 61 coord += coords[2] | ((high_bits & 0x30) << 4);
62 62
63 return coord / 3; 63 return coord / 3;
64 } 64 }
65 65
66 static irqreturn_t jornada720_ts_interrupt(int 66 static irqreturn_t jornada720_ts_interrupt(int irq, void *dev_id)
67 { 67 {
68 struct platform_device *pdev = dev_id; 68 struct platform_device *pdev = dev_id;
69 struct jornada_ts *jornada_ts = platfo 69 struct jornada_ts *jornada_ts = platform_get_drvdata(pdev);
70 struct input_dev *input = jornada_ts-> 70 struct input_dev *input = jornada_ts->dev;
71 int x, y; 71 int x, y;
72 72
73 /* If GPIO_GPIO9 is set to high then r 73 /* If GPIO_GPIO9 is set to high then report pen up */
74 if (GPLR & GPIO_GPIO(9)) { 74 if (GPLR & GPIO_GPIO(9)) {
75 input_report_key(input, BTN_TO 75 input_report_key(input, BTN_TOUCH, 0);
76 input_sync(input); 76 input_sync(input);
77 } else { 77 } else {
78 jornada_ssp_start(); 78 jornada_ssp_start();
79 79
80 /* proper reply to request is 80 /* proper reply to request is always TXDUMMY */
81 if (jornada_ssp_inout(GETTOUCH 81 if (jornada_ssp_inout(GETTOUCHSAMPLES) == TXDUMMY) {
82 jornada720_ts_collect_ 82 jornada720_ts_collect_data(jornada_ts);
83 83
84 x = jornada720_ts_aver 84 x = jornada720_ts_average(jornada_ts->x_data);
85 y = jornada720_ts_aver 85 y = jornada720_ts_average(jornada_ts->y_data);
86 86
87 input_report_key(input 87 input_report_key(input, BTN_TOUCH, 1);
88 input_report_abs(input 88 input_report_abs(input, ABS_X, x);
89 input_report_abs(input 89 input_report_abs(input, ABS_Y, y);
90 input_sync(input); 90 input_sync(input);
91 } 91 }
92 92
93 jornada_ssp_end(); 93 jornada_ssp_end();
94 } 94 }
95 95
96 return IRQ_HANDLED; 96 return IRQ_HANDLED;
97 } 97 }
98 98
99 static int __devinit jornada720_ts_probe(struc 99 static int __devinit jornada720_ts_probe(struct platform_device *pdev)
100 { 100 {
101 struct jornada_ts *jornada_ts; 101 struct jornada_ts *jornada_ts;
102 struct input_dev *input_dev; 102 struct input_dev *input_dev;
103 int error; 103 int error;
104 104
105 jornada_ts = kzalloc(sizeof(struct jor 105 jornada_ts = kzalloc(sizeof(struct jornada_ts), GFP_KERNEL);
106 input_dev = input_allocate_device(); 106 input_dev = input_allocate_device();
107 107
108 if (!jornada_ts || !input_dev) { 108 if (!jornada_ts || !input_dev) {
109 error = -ENOMEM; 109 error = -ENOMEM;
110 goto fail1; 110 goto fail1;
111 } 111 }
112 112
113 platform_set_drvdata(pdev, jornada_ts) 113 platform_set_drvdata(pdev, jornada_ts);
114 114
115 jornada_ts->dev = input_dev; 115 jornada_ts->dev = input_dev;
116 116
117 input_dev->name = "HP Jornada 7xx Touc 117 input_dev->name = "HP Jornada 7xx Touchscreen";
118 input_dev->phys = "jornadats/input0"; 118 input_dev->phys = "jornadats/input0";
119 input_dev->id.bustype = BUS_HOST; 119 input_dev->id.bustype = BUS_HOST;
120 input_dev->dev.parent = &pdev->dev; 120 input_dev->dev.parent = &pdev->dev;
121 121
122 input_dev->evbit[0] = BIT(EV_KEY) | BI !! 122 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
123 input_dev->keybit[LONG(BTN_TOUCH)] = B !! 123 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
124 input_set_abs_params(input_dev, ABS_X, 124 input_set_abs_params(input_dev, ABS_X, 270, 3900, 0, 0);
125 input_set_abs_params(input_dev, ABS_Y, 125 input_set_abs_params(input_dev, ABS_Y, 180, 3700, 0, 0);
126 126
127 error = request_irq(IRQ_GPIO9, 127 error = request_irq(IRQ_GPIO9,
128 jornada720_ts_interrup 128 jornada720_ts_interrupt,
129 IRQF_DISABLED | IRQF_T 129 IRQF_DISABLED | IRQF_TRIGGER_RISING,
130 "HP7XX Touchscreen dri 130 "HP7XX Touchscreen driver", pdev);
131 if (error) { 131 if (error) {
132 printk(KERN_INFO "HP7XX TS : U 132 printk(KERN_INFO "HP7XX TS : Unable to acquire irq!\n");
133 goto fail1; 133 goto fail1;
134 } 134 }
135 135
136 error = input_register_device(jornada_ 136 error = input_register_device(jornada_ts->dev);
137 if (error) 137 if (error)
138 goto fail2; 138 goto fail2;
139 139
140 return 0; 140 return 0;
141 141
142 fail2: 142 fail2:
143 free_irq(IRQ_GPIO9, pdev); 143 free_irq(IRQ_GPIO9, pdev);
144 fail1: 144 fail1:
145 platform_set_drvdata(pdev, NULL); 145 platform_set_drvdata(pdev, NULL);
146 input_free_device(input_dev); 146 input_free_device(input_dev);
147 kfree(jornada_ts); 147 kfree(jornada_ts);
148 return error; 148 return error;
149 } 149 }
150 150
151 static int __devexit jornada720_ts_remove(stru 151 static int __devexit jornada720_ts_remove(struct platform_device *pdev)
152 { 152 {
153 struct jornada_ts *jornada_ts = platfo 153 struct jornada_ts *jornada_ts = platform_get_drvdata(pdev);
154 154
155 free_irq(IRQ_GPIO9, pdev); 155 free_irq(IRQ_GPIO9, pdev);
156 platform_set_drvdata(pdev, NULL); 156 platform_set_drvdata(pdev, NULL);
157 input_unregister_device(jornada_ts->de 157 input_unregister_device(jornada_ts->dev);
158 kfree(jornada_ts); 158 kfree(jornada_ts);
159 159
160 return 0; 160 return 0;
161 } 161 }
162 162
>> 163 /* work with hotplug and coldplug */
>> 164 MODULE_ALIAS("platform:jornada_ts");
>> 165
163 static struct platform_driver jornada720_ts_dr 166 static struct platform_driver jornada720_ts_driver = {
164 .probe = jornada720_ts_probe, 167 .probe = jornada720_ts_probe,
165 .remove = __devexit_p(jornada7 168 .remove = __devexit_p(jornada720_ts_remove),
166 .driver = { 169 .driver = {
167 .name = "jornada_ts", 170 .name = "jornada_ts",
>> 171 .owner = THIS_MODULE,
168 }, 172 },
169 }; 173 };
170 174
171 static int __init jornada720_ts_init(void) 175 static int __init jornada720_ts_init(void)
172 { 176 {
173 return platform_driver_register(&jorna 177 return platform_driver_register(&jornada720_ts_driver);
174 } 178 }
175 179
176 static void __exit jornada720_ts_exit(void) 180 static void __exit jornada720_ts_exit(void)
177 { 181 {
178 platform_driver_unregister(&jornada720 182 platform_driver_unregister(&jornada720_ts_driver);
179 } 183 }
180 184
181 module_init(jornada720_ts_init); 185 module_init(jornada720_ts_init);
182 module_exit(jornada720_ts_exit); 186 module_exit(jornada720_ts_exit);
183 187
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