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path: root/drivers/input/keyboard/tosakbd.c
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Diffstat (limited to 'drivers/input/keyboard/tosakbd.c')
-rw-r--r--drivers/input/keyboard/tosakbd.c431
1 files changed, 0 insertions, 431 deletions
diff --git a/drivers/input/keyboard/tosakbd.c b/drivers/input/keyboard/tosakbd.c
deleted file mode 100644
index 3910f269cfc8..000000000000
--- a/drivers/input/keyboard/tosakbd.c
+++ /dev/null
@@ -1,431 +0,0 @@
1/*
2 * Keyboard driver for Sharp Tosa models (SL-6000x)
3 *
4 * Copyright (c) 2005 Dirk Opfer
5 * Copyright (c) 2007 Dmitry Baryshkov
6 *
7 * Based on xtkbd.c/locomkbd.c/corgikbd.c
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/platform_device.h>
18#include <linux/input.h>
19#include <linux/delay.h>
20#include <linux/interrupt.h>
21#include <linux/slab.h>
22
23#include <mach/gpio.h>
24#include <mach/tosa.h>
25
26#define KB_ROWMASK(r) (1 << (r))
27#define SCANCODE(r, c) (((r)<<4) + (c) + 1)
28#define NR_SCANCODES SCANCODE(TOSA_KEY_SENSE_NUM - 1, TOSA_KEY_STROBE_NUM - 1) + 1
29
30#define SCAN_INTERVAL (HZ/10)
31
32#define KB_DISCHARGE_DELAY 10
33#define KB_ACTIVATE_DELAY 10
34
35static unsigned short tosakbd_keycode[NR_SCANCODES] = {
360,
370, KEY_W, 0, 0, 0, KEY_K, KEY_BACKSPACE, KEY_P,
380, 0, 0, 0, 0, 0, 0, 0,
39KEY_Q, KEY_E, KEY_T, KEY_Y, 0, KEY_O, KEY_I, KEY_COMMA,
400, 0, 0, 0, 0, 0, 0, 0,
41KEY_A, KEY_D, KEY_G, KEY_U, 0, KEY_L, KEY_ENTER, KEY_DOT,
420, 0, 0, 0, 0, 0, 0, 0,
43KEY_Z, KEY_C, KEY_V, KEY_J, TOSA_KEY_ADDRESSBOOK, TOSA_KEY_CANCEL, TOSA_KEY_CENTER, TOSA_KEY_OK,
44KEY_LEFTSHIFT, 0, 0, 0, 0, 0, 0, 0,
45KEY_S, KEY_R, KEY_B, KEY_N, TOSA_KEY_CALENDAR, TOSA_KEY_HOMEPAGE, KEY_LEFTCTRL, TOSA_KEY_LIGHT,
460, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, 0,
47KEY_TAB, KEY_SLASH, KEY_H, KEY_M, TOSA_KEY_MENU, 0, KEY_UP, 0,
480, 0, TOSA_KEY_FN, 0, 0, 0, 0, 0,
49KEY_X, KEY_F, KEY_SPACE, KEY_APOSTROPHE, TOSA_KEY_MAIL, KEY_LEFT, KEY_DOWN, KEY_RIGHT,
500, 0, 0,
51};
52
53struct tosakbd {
54 unsigned short keycode[ARRAY_SIZE(tosakbd_keycode)];
55 struct input_dev *input;
56 bool suspended;
57 spinlock_t lock; /* protect kbd scanning */
58 struct timer_list timer;
59};
60
61
62/* Helper functions for reading the keyboard matrix
63 * Note: We should really be using the generic gpio functions to alter
64 * GPDR but it requires a function call per GPIO bit which is
65 * excessive when we need to access 12 bits at once, multiple times.
66 * These functions must be called within local_irq_save()/local_irq_restore()
67 * or similar.
68 */
69#define GET_ROWS_STATUS(c) ((GPLR2 & TOSA_GPIO_ALL_SENSE_BIT) >> TOSA_GPIO_ALL_SENSE_RSHIFT)
70
71static inline void tosakbd_discharge_all(void)
72{
73 /* STROBE All HiZ */
74 GPCR1 = TOSA_GPIO_HIGH_STROBE_BIT;
75 GPDR1 &= ~TOSA_GPIO_HIGH_STROBE_BIT;
76 GPCR2 = TOSA_GPIO_LOW_STROBE_BIT;
77 GPDR2 &= ~TOSA_GPIO_LOW_STROBE_BIT;
78}
79
80static inline void tosakbd_activate_all(void)
81{
82 /* STROBE ALL -> High */
83 GPSR1 = TOSA_GPIO_HIGH_STROBE_BIT;
84 GPDR1 |= TOSA_GPIO_HIGH_STROBE_BIT;
85 GPSR2 = TOSA_GPIO_LOW_STROBE_BIT;
86 GPDR2 |= TOSA_GPIO_LOW_STROBE_BIT;
87
88 udelay(KB_DISCHARGE_DELAY);
89
90 /* STATE CLEAR */
91 GEDR2 |= TOSA_GPIO_ALL_SENSE_BIT;
92}
93
94static inline void tosakbd_activate_col(int col)
95{
96 if (col <= 5) {
97 /* STROBE col -> High, not col -> HiZ */
98 GPSR1 = TOSA_GPIO_STROBE_BIT(col);
99 GPDR1 = (GPDR1 & ~TOSA_GPIO_HIGH_STROBE_BIT) | TOSA_GPIO_STROBE_BIT(col);
100 } else {
101 /* STROBE col -> High, not col -> HiZ */
102 GPSR2 = TOSA_GPIO_STROBE_BIT(col);
103 GPDR2 = (GPDR2 & ~TOSA_GPIO_LOW_STROBE_BIT) | TOSA_GPIO_STROBE_BIT(col);
104 }
105}
106
107static inline void tosakbd_reset_col(int col)
108{
109 if (col <= 5) {
110 /* STROBE col -> Low */
111 GPCR1 = TOSA_GPIO_STROBE_BIT(col);
112 /* STROBE col -> out, not col -> HiZ */
113 GPDR1 = (GPDR1 & ~TOSA_GPIO_HIGH_STROBE_BIT) | TOSA_GPIO_STROBE_BIT(col);
114 } else {
115 /* STROBE col -> Low */
116 GPCR2 = TOSA_GPIO_STROBE_BIT(col);
117 /* STROBE col -> out, not col -> HiZ */
118 GPDR2 = (GPDR2 & ~TOSA_GPIO_LOW_STROBE_BIT) | TOSA_GPIO_STROBE_BIT(col);
119 }
120}
121/*
122 * The tosa keyboard only generates interrupts when a key is pressed.
123 * So when a key is pressed, we enable a timer. This timer scans the
124 * keyboard, and this is how we detect when the key is released.
125 */
126
127/* Scan the hardware keyboard and push any changes up through the input layer */
128static void tosakbd_scankeyboard(struct platform_device *dev)
129{
130 struct tosakbd *tosakbd = platform_get_drvdata(dev);
131 unsigned int row, col, rowd;
132 unsigned long flags;
133 unsigned int num_pressed = 0;
134
135 spin_lock_irqsave(&tosakbd->lock, flags);
136
137 if (tosakbd->suspended)
138 goto out;
139
140 for (col = 0; col < TOSA_KEY_STROBE_NUM; col++) {
141 /*
142 * Discharge the output driver capacitatance
143 * in the keyboard matrix. (Yes it is significant..)
144 */
145 tosakbd_discharge_all();
146 udelay(KB_DISCHARGE_DELAY);
147
148 tosakbd_activate_col(col);
149 udelay(KB_ACTIVATE_DELAY);
150
151 rowd = GET_ROWS_STATUS(col);
152
153 for (row = 0; row < TOSA_KEY_SENSE_NUM; row++) {
154 unsigned int scancode, pressed;
155 scancode = SCANCODE(row, col);
156 pressed = rowd & KB_ROWMASK(row);
157
158 if (pressed && !tosakbd->keycode[scancode])
159 dev_warn(&dev->dev,
160 "unhandled scancode: 0x%02x\n",
161 scancode);
162
163 input_report_key(tosakbd->input,
164 tosakbd->keycode[scancode],
165 pressed);
166 if (pressed)
167 num_pressed++;
168 }
169
170 tosakbd_reset_col(col);
171 }
172
173 tosakbd_activate_all();
174
175 input_sync(tosakbd->input);
176
177 /* if any keys are pressed, enable the timer */
178 if (num_pressed)
179 mod_timer(&tosakbd->timer, jiffies + SCAN_INTERVAL);
180
181 out:
182 spin_unlock_irqrestore(&tosakbd->lock, flags);
183}
184
185/*
186 * tosa keyboard interrupt handler.
187 */
188static irqreturn_t tosakbd_interrupt(int irq, void *__dev)
189{
190 struct platform_device *dev = __dev;
191 struct tosakbd *tosakbd = platform_get_drvdata(dev);
192
193 if (!timer_pending(&tosakbd->timer)) {
194 /** wait chattering delay **/
195 udelay(20);
196 tosakbd_scankeyboard(dev);
197 }
198
199 return IRQ_HANDLED;
200}
201
202/*
203 * tosa timer checking for released keys
204 */
205static void tosakbd_timer_callback(unsigned long __dev)
206{
207 struct platform_device *dev = (struct platform_device *)__dev;
208
209 tosakbd_scankeyboard(dev);
210}
211
212#ifdef CONFIG_PM
213static int tosakbd_suspend(struct platform_device *dev, pm_message_t state)
214{
215 struct tosakbd *tosakbd = platform_get_drvdata(dev);
216 unsigned long flags;
217
218 spin_lock_irqsave(&tosakbd->lock, flags);
219 tosakbd->suspended = true;
220 spin_unlock_irqrestore(&tosakbd->lock, flags);
221
222 del_timer_sync(&tosakbd->timer);
223
224 return 0;
225}
226
227static int tosakbd_resume(struct platform_device *dev)
228{
229 struct tosakbd *tosakbd = platform_get_drvdata(dev);
230
231 tosakbd->suspended = false;
232 tosakbd_scankeyboard(dev);
233
234 return 0;
235}
236#else
237#define tosakbd_suspend NULL
238#define tosakbd_resume NULL
239#endif
240
241static int __devinit tosakbd_probe(struct platform_device *pdev) {
242
243 int i;
244 struct tosakbd *tosakbd;
245 struct input_dev *input_dev;
246 int error;
247
248 tosakbd = kzalloc(sizeof(struct tosakbd), GFP_KERNEL);
249 if (!tosakbd)
250 return -ENOMEM;
251
252 input_dev = input_allocate_device();
253 if (!input_dev) {
254 kfree(tosakbd);
255 return -ENOMEM;
256 }
257
258 platform_set_drvdata(pdev, tosakbd);
259
260 spin_lock_init(&tosakbd->lock);
261
262 /* Init Keyboard rescan timer */
263 init_timer(&tosakbd->timer);
264 tosakbd->timer.function = tosakbd_timer_callback;
265 tosakbd->timer.data = (unsigned long) pdev;
266
267 tosakbd->input = input_dev;
268
269 input_set_drvdata(input_dev, tosakbd);
270 input_dev->name = "Tosa Keyboard";
271 input_dev->phys = "tosakbd/input0";
272 input_dev->dev.parent = &pdev->dev;
273
274 input_dev->id.bustype = BUS_HOST;
275 input_dev->id.vendor = 0x0001;
276 input_dev->id.product = 0x0001;
277 input_dev->id.version = 0x0100;
278
279 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
280 input_dev->keycode = tosakbd->keycode;
281 input_dev->keycodesize = sizeof(tosakbd->keycode[0]);
282 input_dev->keycodemax = ARRAY_SIZE(tosakbd_keycode);
283
284 memcpy(tosakbd->keycode, tosakbd_keycode, sizeof(tosakbd_keycode));
285
286 for (i = 0; i < ARRAY_SIZE(tosakbd_keycode); i++)
287 __set_bit(tosakbd->keycode[i], input_dev->keybit);
288 __clear_bit(KEY_RESERVED, input_dev->keybit);
289
290 /* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */
291 for (i = 0; i < TOSA_KEY_SENSE_NUM; i++) {
292 int gpio = TOSA_GPIO_KEY_SENSE(i);
293 int irq;
294 error = gpio_request(gpio, "tosakbd");
295 if (error < 0) {
296 printk(KERN_ERR "tosakbd: failed to request GPIO %d, "
297 " error %d\n", gpio, error);
298 goto fail;
299 }
300
301 error = gpio_direction_input(TOSA_GPIO_KEY_SENSE(i));
302 if (error < 0) {
303 printk(KERN_ERR "tosakbd: failed to configure input"
304 " direction for GPIO %d, error %d\n",
305 gpio, error);
306 gpio_free(gpio);
307 goto fail;
308 }
309
310 irq = gpio_to_irq(gpio);
311 if (irq < 0) {
312 error = irq;
313 printk(KERN_ERR "gpio-keys: Unable to get irq number"
314 " for GPIO %d, error %d\n",
315 gpio, error);
316 gpio_free(gpio);
317 goto fail;
318 }
319
320 error = request_irq(irq, tosakbd_interrupt,
321 IRQF_DISABLED | IRQF_TRIGGER_RISING,
322 "tosakbd", pdev);
323
324 if (error) {
325 printk("tosakbd: Can't get IRQ: %d: error %d!\n",
326 irq, error);
327 gpio_free(gpio);
328 goto fail;
329 }
330 }
331
332 /* Set Strobe lines as outputs - set high */
333 for (i = 0; i < TOSA_KEY_STROBE_NUM; i++) {
334 int gpio = TOSA_GPIO_KEY_STROBE(i);
335 error = gpio_request(gpio, "tosakbd");
336 if (error < 0) {
337 printk(KERN_ERR "tosakbd: failed to request GPIO %d, "
338 " error %d\n", gpio, error);
339 goto fail2;
340 }
341
342 error = gpio_direction_output(gpio, 1);
343 if (error < 0) {
344 printk(KERN_ERR "tosakbd: failed to configure input"
345 " direction for GPIO %d, error %d\n",
346 gpio, error);
347 gpio_free(gpio);
348 goto fail2;
349 }
350
351 }
352
353 error = input_register_device(input_dev);
354 if (error) {
355 printk(KERN_ERR "tosakbd: Unable to register input device, "
356 "error: %d\n", error);
357 goto fail2;
358 }
359
360 printk(KERN_INFO "input: Tosa Keyboard Registered\n");
361
362 return 0;
363
364fail2:
365 while (--i >= 0)
366 gpio_free(TOSA_GPIO_KEY_STROBE(i));
367
368 i = TOSA_KEY_SENSE_NUM;
369fail:
370 while (--i >= 0) {
371 free_irq(gpio_to_irq(TOSA_GPIO_KEY_SENSE(i)), pdev);
372 gpio_free(TOSA_GPIO_KEY_SENSE(i));
373 }
374
375 platform_set_drvdata(pdev, NULL);
376 input_free_device(input_dev);
377 kfree(tosakbd);
378
379 return error;
380}
381
382static int __devexit tosakbd_remove(struct platform_device *dev)
383{
384 int i;
385 struct tosakbd *tosakbd = platform_get_drvdata(dev);
386
387 for (i = 0; i < TOSA_KEY_STROBE_NUM; i++)
388 gpio_free(TOSA_GPIO_KEY_STROBE(i));
389
390 for (i = 0; i < TOSA_KEY_SENSE_NUM; i++) {
391 free_irq(gpio_to_irq(TOSA_GPIO_KEY_SENSE(i)), dev);
392 gpio_free(TOSA_GPIO_KEY_SENSE(i));
393 }
394
395 del_timer_sync(&tosakbd->timer);
396
397 input_unregister_device(tosakbd->input);
398
399 kfree(tosakbd);
400
401 return 0;
402}
403
404static struct platform_driver tosakbd_driver = {
405 .probe = tosakbd_probe,
406 .remove = __devexit_p(tosakbd_remove),
407 .suspend = tosakbd_suspend,
408 .resume = tosakbd_resume,
409 .driver = {
410 .name = "tosa-keyboard",
411 .owner = THIS_MODULE,
412 },
413};
414
415static int __devinit tosakbd_init(void)
416{
417 return platform_driver_register(&tosakbd_driver);
418}
419
420static void __exit tosakbd_exit(void)
421{
422 platform_driver_unregister(&tosakbd_driver);
423}
424
425module_init(tosakbd_init);
426module_exit(tosakbd_exit);
427
428MODULE_AUTHOR("Dirk Opfer <Dirk@Opfer-Online.de>");
429MODULE_DESCRIPTION("Tosa Keyboard Driver");
430MODULE_LICENSE("GPL v2");
431MODULE_ALIAS("platform:tosa-keyboard");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-17 10:29:45 -0500