1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * drivers/input/keyboard/jornada720_kbd.c
4 *
5 * HP Jornada 720 keyboard platform driver
6 *
7 * Copyright (C) 2006/2007 Kristoffer Ericson <Kristoffer.Ericson@Gmail.com>
8 *
9 *    Copyright (C) 2006 jornada 720 kbd driver by
10		Filip Zyzniewsk <Filip.Zyzniewski@tefnet.plX
11 *     based on (C) 2004 jornada 720 kbd driver by
12		Alex Lange <chicken@handhelds.org>
13 */
14#include <linux/device.h>
15#include <linux/errno.h>
16#include <linux/interrupt.h>
17#include <linux/input.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/slab.h>
22
23#include <mach/jornada720.h>
24
25MODULE_AUTHOR("Kristoffer Ericson <Kristoffer.Ericson@gmail.com>");
26MODULE_DESCRIPTION("HP Jornada 710/720/728 keyboard driver");
27MODULE_LICENSE("GPL v2");
28
29static unsigned short jornada_std_keymap[128] = {					/* ROW */
30	0, KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,		/* #1  */
31	KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,	/*  -> */
32	0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9,		/* #2  */
33	KEY_0, KEY_MINUS, KEY_EQUAL,0, 0, 0,						/*  -> */
34	0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O,		/* #3  */
35	KEY_P, KEY_BACKSLASH, KEY_BACKSPACE, 0, 0, 0,					/*  -> */
36	0, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L,		/* #4  */
37	KEY_SEMICOLON, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0,				/*  -> */
38	0, KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M, KEY_COMMA,			/* #5  */
39	KEY_DOT, KEY_KPMINUS, KEY_APOSTROPHE, KEY_ENTER, 0, 0,0,			/*  -> */
40	0, KEY_TAB, 0, KEY_LEFTSHIFT, 0, KEY_APOSTROPHE, 0, 0, 0, 0,			/* #6  */
41	KEY_UP, 0, KEY_RIGHTSHIFT, 0, 0, 0,0, 0, 0, 0, 0, KEY_LEFTALT, KEY_GRAVE,	/*  -> */
42	0, 0, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0,0, KEY_KPASTERISK,		/*  -> */
43	KEY_LEFTCTRL, 0, KEY_SPACE, 0, 0, 0, KEY_SLASH, KEY_DELETE, 0, 0,		/*  -> */
44	0, 0, 0, KEY_POWER,								/*  -> */
45};
46
47struct jornadakbd {
48	unsigned short keymap[ARRAY_SIZE(jornada_std_keymap)];
49	struct input_dev *input;
50};
51
52static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id)
53{
54	struct platform_device *pdev = dev_id;
55	struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
56	struct input_dev *input = jornadakbd->input;
57	u8 count, kbd_data, scan_code;
58
59	/* startup ssp with spinlock */
60	jornada_ssp_start();
61
62	if (jornada_ssp_inout(GETSCANKEYCODE) != TXDUMMY) {
63		dev_dbg(&pdev->dev,
64			"GetKeycode command failed with ETIMEDOUT, flushed bus\n");
65	} else {
66		/* How many keycodes are waiting for us? */
67		count = jornada_ssp_byte(TXDUMMY);
68
69		/* Lets drag them out one at a time */
70		while (count--) {
71			/* Exchange TxDummy for location (keymap[kbddata]) */
72			kbd_data = jornada_ssp_byte(TXDUMMY);
73			scan_code = kbd_data & 0x7f;
74
75			input_event(input, EV_MSC, MSC_SCAN, scan_code);
76			input_report_key(input, jornadakbd->keymap[scan_code],
77					 !(kbd_data & 0x80));
78			input_sync(input);
79		}
80	}
81
82	/* release spinlock and turn off ssp */
83	jornada_ssp_end();
84
85	return IRQ_HANDLED;
86};
87
88static int jornada720_kbd_probe(struct platform_device *pdev)
89{
90	struct jornadakbd *jornadakbd;
91	struct input_dev *input_dev;
92	int i, err, irq;
93
94	irq = platform_get_irq(pdev, 0);
95	if (irq <= 0)
96		return irq < 0 ? irq : -EINVAL;
97
98	jornadakbd = devm_kzalloc(&pdev->dev, sizeof(*jornadakbd), GFP_KERNEL);
99	input_dev = devm_input_allocate_device(&pdev->dev);
100	if (!jornadakbd || !input_dev)
101		return -ENOMEM;
102
103	platform_set_drvdata(pdev, jornadakbd);
104
105	memcpy(jornadakbd->keymap, jornada_std_keymap,
106		sizeof(jornada_std_keymap));
107	jornadakbd->input = input_dev;
108
109	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
110	input_dev->name = "HP Jornada 720 keyboard";
111	input_dev->phys = "jornadakbd/input0";
112	input_dev->keycode = jornadakbd->keymap;
113	input_dev->keycodesize = sizeof(unsigned short);
114	input_dev->keycodemax = ARRAY_SIZE(jornada_std_keymap);
115	input_dev->id.bustype = BUS_HOST;
116	input_dev->dev.parent = &pdev->dev;
117
118	for (i = 0; i < ARRAY_SIZE(jornadakbd->keymap); i++)
119		__set_bit(jornadakbd->keymap[i], input_dev->keybit);
120	__clear_bit(KEY_RESERVED, input_dev->keybit);
121
122	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
123
124	err = devm_request_irq(&pdev->dev, irq, jornada720_kbd_interrupt,
125			       IRQF_TRIGGER_FALLING, "jornadakbd", pdev);
126	if (err) {
127		dev_err(&pdev->dev, "unable to grab IRQ%d: %d\n", irq, err);
128		return err;
129	}
130
131	return input_register_device(jornadakbd->input);
132};
133
134/* work with hotplug and coldplug */
135MODULE_ALIAS("platform:jornada720_kbd");
136
137static struct platform_driver jornada720_kbd_driver = {
138	.driver  = {
139		.name    = "jornada720_kbd",
140	 },
141	.probe   = jornada720_kbd_probe,
142};
143module_platform_driver(jornada720_kbd_driver);
144