Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #include <linux/input.h> |
2 | #include <linux/module.h> | |
3 | #include <linux/init.h> | |
4 | ||
5 | #include <linux/interrupt.h> | |
6 | #include <asm/io.h> | |
7 | #include <asm/delay.h> | |
8 | #include <asm/adc.h> | |
9 | #include <asm/hp6xx/hp6xx.h> | |
10 | ||
11 | #define MODNAME "hp680_ts_input" | |
12 | ||
13 | #define HP680_TS_ABS_X_MIN 40 | |
14 | #define HP680_TS_ABS_X_MAX 950 | |
15 | #define HP680_TS_ABS_Y_MIN 80 | |
16 | #define HP680_TS_ABS_Y_MAX 910 | |
17 | ||
1da177e4 LT |
18 | #define PHDR 0xa400012e |
19 | #define SCPDR 0xa4000136 | |
20 | ||
21 | static void do_softint(void *data); | |
22 | ||
eca1ed19 | 23 | static struct input_dev *hp680_ts_dev; |
1da177e4 | 24 | static DECLARE_WORK(work, do_softint, 0); |
1da177e4 LT |
25 | |
26 | static void do_softint(void *data) | |
27 | { | |
28 | int absx = 0, absy = 0; | |
29 | u8 scpdr; | |
30 | int touched = 0; | |
31 | ||
32 | if (ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN) { | |
33 | scpdr = ctrl_inb(SCPDR); | |
34 | scpdr |= SCPDR_TS_SCAN_ENABLE; | |
35 | scpdr &= ~SCPDR_TS_SCAN_Y; | |
36 | ctrl_outb(scpdr, SCPDR); | |
37 | udelay(30); | |
38 | ||
39 | absy = adc_single(ADC_CHANNEL_TS_Y); | |
40 | ||
41 | scpdr = ctrl_inb(SCPDR); | |
42 | scpdr |= SCPDR_TS_SCAN_Y; | |
43 | scpdr &= ~SCPDR_TS_SCAN_X; | |
44 | ctrl_outb(scpdr, SCPDR); | |
45 | udelay(30); | |
46 | ||
47 | absx = adc_single(ADC_CHANNEL_TS_X); | |
48 | ||
49 | scpdr = ctrl_inb(SCPDR); | |
50 | scpdr |= SCPDR_TS_SCAN_X; | |
51 | scpdr &= ~SCPDR_TS_SCAN_ENABLE; | |
52 | ctrl_outb(scpdr, SCPDR); | |
53 | udelay(100); | |
54 | touched = ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN; | |
55 | } | |
56 | ||
57 | if (touched) { | |
eca1ed19 DT |
58 | input_report_key(hp680_ts_dev, BTN_TOUCH, 1); |
59 | input_report_abs(hp680_ts_dev, ABS_X, absx); | |
60 | input_report_abs(hp680_ts_dev, ABS_Y, absy); | |
1da177e4 | 61 | } else { |
eca1ed19 | 62 | input_report_key(hp680_ts_dev, BTN_TOUCH, 0); |
1da177e4 LT |
63 | } |
64 | ||
eca1ed19 | 65 | input_sync(hp680_ts_dev); |
1da177e4 LT |
66 | enable_irq(HP680_TS_IRQ); |
67 | } | |
68 | ||
7d12e780 | 69 | static irqreturn_t hp680_ts_interrupt(int irq, void *dev) |
1da177e4 LT |
70 | { |
71 | disable_irq_nosync(irq); | |
72 | schedule_delayed_work(&work, HZ / 20); | |
73 | ||
74 | return IRQ_HANDLED; | |
75 | } | |
76 | ||
77 | static int __init hp680_ts_init(void) | |
78 | { | |
eca1ed19 DT |
79 | hp680_ts_dev = input_allocate_device(); |
80 | if (!hp680_ts_dev) | |
81 | return -ENOMEM; | |
1da177e4 | 82 | |
eca1ed19 DT |
83 | hp680_ts_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY); |
84 | hp680_ts_dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y); | |
85 | hp680_ts_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); | |
1da177e4 | 86 | |
eca1ed19 DT |
87 | hp680_ts_dev->absmin[ABS_X] = HP680_TS_ABS_X_MIN; |
88 | hp680_ts_dev->absmin[ABS_Y] = HP680_TS_ABS_Y_MIN; | |
89 | hp680_ts_dev->absmax[ABS_X] = HP680_TS_ABS_X_MAX; | |
90 | hp680_ts_dev->absmax[ABS_Y] = HP680_TS_ABS_Y_MAX; | |
1da177e4 | 91 | |
eca1ed19 DT |
92 | hp680_ts_dev->name = "HP Jornada touchscreen"; |
93 | hp680_ts_dev->phys = "hp680_ts/input0"; | |
1da177e4 | 94 | |
eca1ed19 DT |
95 | input_register_device(hp680_ts_dev); |
96 | ||
97 | if (request_irq(HP680_TS_IRQ, hp680_ts_interrupt, | |
dace1453 | 98 | IRQF_DISABLED, MODNAME, 0) < 0) { |
eca1ed19 | 99 | printk(KERN_ERR "hp680_touchscreen.c: Can't allocate irq %d\n", |
1da177e4 | 100 | HP680_TS_IRQ); |
eca1ed19 | 101 | input_unregister_device(hp680_ts_dev); |
1da177e4 LT |
102 | return -EBUSY; |
103 | } | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static void __exit hp680_ts_exit(void) | |
109 | { | |
110 | free_irq(HP680_TS_IRQ, 0); | |
111 | cancel_delayed_work(&work); | |
112 | flush_scheduled_work(); | |
eca1ed19 | 113 | input_unregister_device(hp680_ts_dev); |
1da177e4 LT |
114 | } |
115 | ||
116 | module_init(hp680_ts_init); | |
117 | module_exit(hp680_ts_exit); | |
118 | ||
119 | MODULE_AUTHOR("Andriy Skulysh, askulysh@image.kiev.ua"); | |
120 | MODULE_DESCRIPTION("HP Jornada 680 touchscreen driver"); | |
121 | MODULE_LICENSE("GPL"); |