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32#include <linux/slab.h>
33#include <linux/module.h>
34#include <linux/input.h>
35#include <linux/serio.h>
36
37#define DRIVER_DESC "Stowaway keyboard driver"
38
39MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
40MODULE_DESCRIPTION(DRIVER_DESC);
41MODULE_LICENSE("GPL");
42
43#define SKBD_KEY_MASK 0x7f
44#define SKBD_RELEASE 0x80
45
46static unsigned char skbd_keycode[128] = {
47 KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7,
48 0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE,
49 KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE,
50 KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0,
51 0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0,
52 0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N,
53 KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC,
54 KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P,
55 KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON,
56 KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT,
57 KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0,
58 KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0,
59 0, 0, 0, 0, 0, 0, 0, 0,
60 0, 0, 0, 0, 0, 0, 0, 0,
61 0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,
62 KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0
63};
64
65struct skbd {
66 unsigned char keycode[128];
67 struct input_dev *dev;
68 struct serio *serio;
69 char phys[32];
70};
71
72static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data,
73 unsigned int flags)
74{
75 struct skbd *skbd = serio_get_drvdata(serio);
76 struct input_dev *dev = skbd->dev;
77
78 if (skbd->keycode[data & SKBD_KEY_MASK]) {
79 input_report_key(dev, skbd->keycode[data & SKBD_KEY_MASK],
80 !(data & SKBD_RELEASE));
81 input_sync(dev);
82 }
83
84 return IRQ_HANDLED;
85}
86
87static int skbd_connect(struct serio *serio, struct serio_driver *drv)
88{
89 struct skbd *skbd;
90 struct input_dev *input_dev;
91 int err = -ENOMEM;
92 int i;
93
94 skbd = kzalloc(sizeof(struct skbd), GFP_KERNEL);
95 input_dev = input_allocate_device();
96 if (!skbd || !input_dev)
97 goto fail1;
98
99 skbd->serio = serio;
100 skbd->dev = input_dev;
101 snprintf(skbd->phys, sizeof(skbd->phys), "%s/input0", serio->phys);
102 memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode));
103
104 input_dev->name = "Stowaway Keyboard";
105 input_dev->phys = skbd->phys;
106 input_dev->id.bustype = BUS_RS232;
107 input_dev->id.vendor = SERIO_STOWAWAY;
108 input_dev->id.product = 0x0001;
109 input_dev->id.version = 0x0100;
110 input_dev->dev.parent = &serio->dev;
111
112 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
113 input_dev->keycode = skbd->keycode;
114 input_dev->keycodesize = sizeof(unsigned char);
115 input_dev->keycodemax = ARRAY_SIZE(skbd_keycode);
116 for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++)
117 set_bit(skbd_keycode[i], input_dev->keybit);
118 clear_bit(0, input_dev->keybit);
119
120 serio_set_drvdata(serio, skbd);
121
122 err = serio_open(serio, drv);
123 if (err)
124 goto fail2;
125
126 err = input_register_device(skbd->dev);
127 if (err)
128 goto fail3;
129
130 return 0;
131
132 fail3: serio_close(serio);
133 fail2: serio_set_drvdata(serio, NULL);
134 fail1: input_free_device(input_dev);
135 kfree(skbd);
136 return err;
137}
138
139static void skbd_disconnect(struct serio *serio)
140{
141 struct skbd *skbd = serio_get_drvdata(serio);
142
143 serio_close(serio);
144 serio_set_drvdata(serio, NULL);
145 input_unregister_device(skbd->dev);
146 kfree(skbd);
147}
148
149static struct serio_device_id skbd_serio_ids[] = {
150 {
151 .type = SERIO_RS232,
152 .proto = SERIO_STOWAWAY,
153 .id = SERIO_ANY,
154 .extra = SERIO_ANY,
155 },
156 { 0 }
157};
158
159MODULE_DEVICE_TABLE(serio, skbd_serio_ids);
160
161static struct serio_driver skbd_drv = {
162 .driver = {
163 .name = "stowaway",
164 },
165 .description = DRIVER_DESC,
166 .id_table = skbd_serio_ids,
167 .interrupt = skbd_interrupt,
168 .connect = skbd_connect,
169 .disconnect = skbd_disconnect,
170};
171
172module_serio_driver(skbd_drv);
173
