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29#include <linux/slab.h>
30#include <linux/module.h>
31#include <linux/input.h>
32#include <linux/serio.h>
33
34#define DRIVER_DESC "XT keyboard driver"
35
36MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
37MODULE_DESCRIPTION(DRIVER_DESC);
38MODULE_LICENSE("GPL");
39
40#define XTKBD_EMUL0 0xe0
41#define XTKBD_EMUL1 0xe1
42#define XTKBD_KEY 0x7f
43#define XTKBD_RELEASE 0x80
44
45static unsigned char xtkbd_keycode[256] = {
46 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
47 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
48 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
49 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
50 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
51 80, 81, 82, 83, 0, 0, 0, 87, 88, 0, 0, 0, 0, 0, 0, 0,
52 0, 0, 0, 0, 0, 87, 88, 0, 0, 0, 0,110,111,103,108,105,
53 106
54};
55
56struct xtkbd {
57 unsigned char keycode[256];
58 struct input_dev *dev;
59 struct serio *serio;
60 char phys[32];
61};
62
63static irqreturn_t xtkbd_interrupt(struct serio *serio,
64 unsigned char data, unsigned int flags)
65{
66 struct xtkbd *xtkbd = serio_get_drvdata(serio);
67
68 switch (data) {
69 case XTKBD_EMUL0:
70 case XTKBD_EMUL1:
71 break;
72 default:
73
74 if (xtkbd->keycode[data & XTKBD_KEY]) {
75 input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
76 input_sync(xtkbd->dev);
77 } else {
78 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
79 data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
80 }
81 }
82 return IRQ_HANDLED;
83}
84
85static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)
86{
87 struct xtkbd *xtkbd;
88 struct input_dev *input_dev;
89 int err = -ENOMEM;
90 int i;
91
92 xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL);
93 input_dev = input_allocate_device();
94 if (!xtkbd || !input_dev)
95 goto fail1;
96
97 xtkbd->serio = serio;
98 xtkbd->dev = input_dev;
99 snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys);
100 memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
101
102 input_dev->name = "XT Keyboard";
103 input_dev->phys = xtkbd->phys;
104 input_dev->id.bustype = BUS_XTKBD;
105 input_dev->id.vendor = 0x0001;
106 input_dev->id.product = 0x0001;
107 input_dev->id.version = 0x0100;
108 input_dev->dev.parent = &serio->dev;
109
110 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
111 input_dev->keycode = xtkbd->keycode;
112 input_dev->keycodesize = sizeof(unsigned char);
113 input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode);
114
115 for (i = 0; i < 255; i++)
116 set_bit(xtkbd->keycode[i], input_dev->keybit);
117 clear_bit(0, input_dev->keybit);
118
119 serio_set_drvdata(serio, xtkbd);
120
121 err = serio_open(serio, drv);
122 if (err)
123 goto fail2;
124
125 err = input_register_device(xtkbd->dev);
126 if (err)
127 goto fail3;
128
129 return 0;
130
131 fail3: serio_close(serio);
132 fail2: serio_set_drvdata(serio, NULL);
133 fail1: input_free_device(input_dev);
134 kfree(xtkbd);
135 return err;
136}
137
138static void xtkbd_disconnect(struct serio *serio)
139{
140 struct xtkbd *xtkbd = serio_get_drvdata(serio);
141
142 serio_close(serio);
143 serio_set_drvdata(serio, NULL);
144 input_unregister_device(xtkbd->dev);
145 kfree(xtkbd);
146}
147
148static const struct serio_device_id xtkbd_serio_ids[] = {
149 {
150 .type = SERIO_XT,
151 .proto = SERIO_ANY,
152 .id = SERIO_ANY,
153 .extra = SERIO_ANY,
154 },
155 { 0 }
156};
157
158MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids);
159
160static struct serio_driver xtkbd_drv = {
161 .driver = {
162 .name = "xtkbd",
163 },
164 .description = DRIVER_DESC,
165 .id_table = xtkbd_serio_ids,
166 .interrupt = xtkbd_interrupt,
167 .connect = xtkbd_connect,
168 .disconnect = xtkbd_disconnect,
169};
170
171module_serio_driver(xtkbd_drv);
172
