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13#include <linux/slab.h>
14#include <linux/module.h>
15#include <linux/input.h>
16#include <linux/serio.h>
17
18#define DRIVER_DESC "Newton keyboard driver"
19
20MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
21MODULE_DESCRIPTION(DRIVER_DESC);
22MODULE_LICENSE("GPL");
23
24#define NKBD_KEY 0x7f
25#define NKBD_PRESS 0x80
26
27static unsigned char nkbd_keycode[128] = {
28 KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
29 KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
30 KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
31 KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
32 KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
33 KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
34 KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
35 KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0,
36 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
37 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
38 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
39 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
40 KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
41};
42
43struct nkbd {
44 unsigned char keycode[128];
45 struct input_dev *dev;
46 struct serio *serio;
47 char phys[32];
48};
49
50static irqreturn_t nkbd_interrupt(struct serio *serio,
51 unsigned char data, unsigned int flags)
52{
53 struct nkbd *nkbd = serio_get_drvdata(serio);
54
55
56 if (nkbd->keycode[data & NKBD_KEY]) {
57 input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
58 input_sync(nkbd->dev);
59 }
60
61 else if (data == 0xe7)
62 printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
63 return IRQ_HANDLED;
64
65}
66
67static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
68{
69 struct nkbd *nkbd;
70 struct input_dev *input_dev;
71 int err = -ENOMEM;
72 int i;
73
74 nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL);
75 input_dev = input_allocate_device();
76 if (!nkbd || !input_dev)
77 goto fail1;
78
79 nkbd->serio = serio;
80 nkbd->dev = input_dev;
81 snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
82 memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
83
84 input_dev->name = "Newton Keyboard";
85 input_dev->phys = nkbd->phys;
86 input_dev->id.bustype = BUS_RS232;
87 input_dev->id.vendor = SERIO_NEWTON;
88 input_dev->id.product = 0x0001;
89 input_dev->id.version = 0x0100;
90 input_dev->dev.parent = &serio->dev;
91
92 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
93 input_dev->keycode = nkbd->keycode;
94 input_dev->keycodesize = sizeof(unsigned char);
95 input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
96 for (i = 0; i < 128; i++)
97 set_bit(nkbd->keycode[i], input_dev->keybit);
98 clear_bit(0, input_dev->keybit);
99
100 serio_set_drvdata(serio, nkbd);
101
102 err = serio_open(serio, drv);
103 if (err)
104 goto fail2;
105
106 err = input_register_device(nkbd->dev);
107 if (err)
108 goto fail3;
109
110 return 0;
111
112 fail3: serio_close(serio);
113 fail2: serio_set_drvdata(serio, NULL);
114 fail1: input_free_device(input_dev);
115 kfree(nkbd);
116 return err;
117}
118
119static void nkbd_disconnect(struct serio *serio)
120{
121 struct nkbd *nkbd = serio_get_drvdata(serio);
122
123 serio_close(serio);
124 serio_set_drvdata(serio, NULL);
125 input_unregister_device(nkbd->dev);
126 kfree(nkbd);
127}
128
129static const struct serio_device_id nkbd_serio_ids[] = {
130 {
131 .type = SERIO_RS232,
132 .proto = SERIO_NEWTON,
133 .id = SERIO_ANY,
134 .extra = SERIO_ANY,
135 },
136 { 0 }
137};
138
139MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
140
141static struct serio_driver nkbd_drv = {
142 .driver = {
143 .name = "newtonkbd",
144 },
145 .description = DRIVER_DESC,
146 .id_table = nkbd_serio_ids,
147 .interrupt = nkbd_interrupt,
148 .connect = nkbd_connect,
149 .disconnect = nkbd_disconnect,
150};
151
152module_serio_driver(nkbd_drv);
153
