1 /*
2 * drivers/input/keyboard/jornada720_kbd.c
3 *
4 * HP Jornada 720 keyboard platform driver
5 *
6 * Copyright (C) 2006/2007 Kristoffer Ericson <Kristoffer.Ericson@Gmail.com>
7 *
8 * Copyright (C) 2006 jornada 720 kbd driver by
9 Filip Zyzniewsk <Filip.Zyzniewski@tefnet.plX
10 * based on (C) 2004 jornada 720 kbd driver by
11 Alex Lange <chicken@handhelds.org>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 *
17 */
18 #include <linux/device.h>
19 #include <linux/errno.h>
20 #include <linux/interrupt.h>
21 #include <linux/init.h>
22 #include <linux/input.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/platform_device.h>
26
27 #include <asm/arch/jornada720.h>
28 #include <asm/hardware.h>
29
30 MODULE_AUTHOR("Kristoffer Ericson <Kristoffer.Ericson@gmail.com>");
31 MODULE_DESCRIPTION("HP Jornada 710/720/728 keyboard driver");
32 MODULE_LICENSE("GPLv2");
33
34 static unsigned short jornada_std_keymap[128] = { /* ROW */
35 0, KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, /* #1 */
36 KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE, /* -> */
37 0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9, /* #2 */
38 KEY_0, KEY_MINUS, KEY_EQUAL,0, 0, 0, /* -> */
39 0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O, /* #3 */
40 KEY_P, KEY_BACKSLASH, KEY_BACKSPACE, 0, 0, 0, /* -> */
41 0, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L, /* #4 */
42 KEY_SEMICOLON, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0, /* -> */
43 0, KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M, KEY_COMMA, /* #5 */
44 KEY_DOT, KEY_KPMINUS, KEY_APOSTROPHE, KEY_ENTER, 0, 0,0, /* -> */
45 0, KEY_TAB, 0, KEY_LEFTSHIFT, 0, KEY_APOSTROPHE, 0, 0, 0, 0, /* #6 */
46 KEY_UP, 0, KEY_RIGHTSHIFT, 0, 0, 0,0, 0, 0, 0, 0, KEY_LEFTALT, KEY_GRAVE, /* -> */
47 0, 0, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0,0, KEY_KPASTERISK, /* -> */
48 KEY_LEFTCTRL, 0, KEY_SPACE, 0, 0, 0, KEY_SLASH, KEY_DELETE, 0, 0, /* -> */
49 0, 0, 0, KEY_POWER, /* -> */
50 };
51
52 struct jornadakbd {
53 unsigned short keymap[ARRAY_SIZE(jornada_std_keymap)];
54 struct input_dev *input;
55 };
56
57 static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id)
58 {
59 struct platform_device *pdev = dev_id;
60 struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
61 struct input_dev *input = jornadakbd->input;
62 u8 count, kbd_data, scan_code;
63
64 /* startup ssp with spinlock */
65 jornada_ssp_start();
66
67 if (jornada_ssp_inout(GETSCANKEYCODE) != TXDUMMY) {
68 printk(KERN_DEBUG
69 "jornada720_kbd: "
70 "GetKeycode command failed with ETIMEDOUT, "
71 "flushed bus\n");
72 } else {
73 /* How many keycodes are waiting for us? */
74 count = jornada_ssp_byte(TXDUMMY);
75
76 /* Lets drag them out one at a time */
77 while (count--) {
78 /* Exchange TxDummy for location (keymap[kbddata]) */
79 kbd_data = jornada_ssp_byte(TXDUMMY);
80 scan_code = kbd_data & 0x7f;
81
82 input_event(input, EV_MSC, MSC_SCAN, scan_code);
83 input_report_key(input, jornadakbd->keymap[scan_code],
84 !(kbd_data & 0x80));
85 input_sync(input);
86 }
87 }
88
89 /* release spinlock and turn off ssp */
90 jornada_ssp_end();
91
92 return IRQ_HANDLED;
93 };
94
95 static int __devinit jornada720_kbd_probe(struct platform_device *pdev)
96 {
97 struct jornadakbd *jornadakbd;
98 struct input_dev *input_dev;
99 int i, err;
100
101 jornadakbd = kzalloc(sizeof(struct jornadakbd), GFP_KERNEL);
102 input_dev = input_allocate_device();
103 if (!jornadakbd || !input_dev) {
104 err = -ENOMEM;
105 goto fail1;
106 }
107
108 platform_set_drvdata(pdev, jornadakbd);
109
110 memcpy(jornadakbd->keymap, jornada_std_keymap,
111 sizeof(jornada_std_keymap));
112 jornadakbd->input = input_dev;
113
114 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
115 input_dev->name = "HP Jornada 720 keyboard";
116 input_dev->phys = "jornadakbd/input0";
117 input_dev->keycode = jornadakbd->keymap;
118 input_dev->keycodesize = sizeof(unsigned short);
119 input_dev->keycodemax = ARRAY_SIZE(jornada_std_keymap);
120 input_dev->id.bustype = BUS_HOST;
121 input_dev->dev.parent = &pdev->dev;
122
123 for (i = 0; i < ARRAY_SIZE(jornadakbd->keymap); i++)
124 __set_bit(jornadakbd->keymap[i], input_dev->keybit);
125 __clear_bit(KEY_RESERVED, input_dev->keybit);
126
127 input_set_capability(input_dev, EV_MSC, MSC_SCAN);
128
129 err = request_irq(IRQ_GPIO0,
130 jornada720_kbd_interrupt,
131 IRQF_DISABLED | IRQF_TRIGGER_FALLING,
132 "jornadakbd", pdev);
133 if (err) {
134 printk(KERN_INFO "jornadakbd720_kbd: Unable to grab IRQ\n");
135 goto fail1;
136 }
137
138 err = input_register_device(jornadakbd->input);
139 if (err)
140 goto fail2;
141
142 return 0;
143
144 fail2: /* IRQ, DEVICE, MEMORY */
145 free_irq(IRQ_GPIO0, pdev);
146 fail1: /* DEVICE, MEMORY */
147 platform_set_drvdata(pdev, NULL);
148 input_free_device(input_dev);
149 kfree(jornadakbd);
150 return err;
151 };
152
153 static int __devexit jornada720_kbd_remove(struct platform_device *pdev)
154 {
155 struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
156
157 free_irq(IRQ_GPIO0, pdev);
158 platform_set_drvdata(pdev, NULL);
159 input_unregister_device(jornadakbd->input);
160 kfree(jornadakbd);
161
162 return 0;
163 }
164
165 static struct platform_driver jornada720_kbd_driver = {
166 .driver = {
167 .name = "jornada720_kbd",
168 },
169 .probe = jornada720_kbd_probe,
170 .remove = __devexit_p(jornada720_kbd_remove),
171 };
172
173 static int __init jornada720_kbd_init(void)
174 {
175 return platform_driver_register(&jornada720_kbd_driver);
176 }
177
178 static void __exit jornada720_kbd_exit(void)
179 {
180 platform_driver_unregister(&jornada720_kbd_driver);
181 }
182
183 module_init(jornada720_kbd_init);
184 module_exit(jornada720_kbd_exit);
185
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