Commit | Line | Data |
---|---|---|
5a90e5bc | 1 | /* |
0e5f11aa | 2 | * linux/drivers/input/keyboard/pxa27x_keypad.c |
5a90e5bc RG |
3 | * |
4 | * Driver for the pxa27x matrix keyboard controller. | |
5 | * | |
6 | * Created: Feb 22, 2007 | |
7 | * Author: Rodolfo Giometti <giometti@linux.it> | |
8 | * | |
9 | * Based on a previous implementations by Kevin O'Connor | |
10 | * <kevin_at_koconnor.net> and Alex Osborne <bobofdoom@gmail.com> and | |
2f82af08 | 11 | * on some suggestions by Nicolas Pitre <nico@fluxnic.net>. |
5a90e5bc RG |
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 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/input.h> | |
24 | #include <linux/device.h> | |
25 | #include <linux/platform_device.h> | |
22d8a73a RK |
26 | #include <linux/clk.h> |
27 | #include <linux/err.h> | |
52ec7752 | 28 | #include <linux/input/matrix_keypad.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
5a90e5bc | 30 | |
5a90e5bc RG |
31 | #include <asm/mach/arch.h> |
32 | #include <asm/mach/map.h> | |
33 | ||
a09e64fb | 34 | #include <mach/hardware.h> |
293b2da1 | 35 | #include <linux/platform_data/keypad-pxa27x.h> |
9c60debd EM |
36 | /* |
37 | * Keypad Controller registers | |
38 | */ | |
39 | #define KPC 0x0000 /* Keypad Control register */ | |
40 | #define KPDK 0x0008 /* Keypad Direct Key register */ | |
41 | #define KPREC 0x0010 /* Keypad Rotary Encoder register */ | |
42 | #define KPMK 0x0018 /* Keypad Matrix Key register */ | |
43 | #define KPAS 0x0020 /* Keypad Automatic Scan register */ | |
44 | ||
45 | /* Keypad Automatic Scan Multiple Key Presser register 0-3 */ | |
46 | #define KPASMKP0 0x0028 | |
47 | #define KPASMKP1 0x0030 | |
48 | #define KPASMKP2 0x0038 | |
49 | #define KPASMKP3 0x0040 | |
50 | #define KPKDI 0x0048 | |
51 | ||
52 | /* bit definitions */ | |
688dad4f SO |
53 | #define KPC_MKRN(n) ((((n) - 1) & 0x7) << 26) /* matrix key row number */ |
54 | #define KPC_MKCN(n) ((((n) - 1) & 0x7) << 23) /* matrix key column number */ | |
55 | #define KPC_DKN(n) ((((n) - 1) & 0x7) << 6) /* direct key number */ | |
d7416f9e | 56 | |
9c60debd EM |
57 | #define KPC_AS (0x1 << 30) /* Automatic Scan bit */ |
58 | #define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */ | |
59 | #define KPC_MI (0x1 << 22) /* Matrix interrupt bit */ | |
60 | #define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */ | |
61 | ||
62 | #define KPC_MS(n) (0x1 << (13 + (n))) /* Matrix scan line 'n' */ | |
63 | #define KPC_MS_ALL (0xff << 13) | |
64 | ||
65 | #define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */ | |
66 | #define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */ | |
67 | #define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */ | |
68 | #define KPC_DI (0x1 << 5) /* Direct key interrupt bit */ | |
69 | #define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */ | |
70 | #define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */ | |
71 | #define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */ | |
72 | #define KPC_DE (0x1 << 1) /* Direct Keypad Enable */ | |
73 | #define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */ | |
74 | ||
62059d9e EM |
75 | #define KPDK_DKP (0x1 << 31) |
76 | #define KPDK_DK(n) ((n) & 0xff) | |
77 | ||
9c60debd EM |
78 | #define KPREC_OF1 (0x1 << 31) |
79 | #define kPREC_UF1 (0x1 << 30) | |
80 | #define KPREC_OF0 (0x1 << 15) | |
81 | #define KPREC_UF0 (0x1 << 14) | |
82 | ||
83 | #define KPREC_RECOUNT0(n) ((n) & 0xff) | |
84 | #define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff) | |
85 | ||
86 | #define KPMK_MKP (0x1 << 31) | |
87 | #define KPAS_SO (0x1 << 31) | |
88 | #define KPASMKPx_SO (0x1 << 31) | |
89 | ||
90 | #define KPAS_MUKP(n) (((n) >> 26) & 0x1f) | |
91 | #define KPAS_RP(n) (((n) >> 4) & 0xf) | |
92 | #define KPAS_CP(n) ((n) & 0xf) | |
5a90e5bc | 93 | |
1814db69 EM |
94 | #define KPASMKP_MKC_MASK (0xff) |
95 | ||
9c60debd EM |
96 | #define keypad_readl(off) __raw_readl(keypad->mmio_base + (off)) |
97 | #define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off)) | |
98 | ||
bd96f378 DT |
99 | #define MAX_MATRIX_KEY_NUM (MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS) |
100 | #define MAX_KEYPAD_KEYS (MAX_MATRIX_KEY_NUM + MAX_DIRECT_KEY_NUM) | |
1814db69 EM |
101 | |
102 | struct pxa27x_keypad { | |
103 | struct pxa27x_keypad_platform_data *pdata; | |
104 | ||
105 | struct clk *clk; | |
106 | struct input_dev *input_dev; | |
9c60debd | 107 | void __iomem *mmio_base; |
1814db69 | 108 | |
39ab9dde EM |
109 | int irq; |
110 | ||
bd96f378 DT |
111 | unsigned short keycodes[MAX_KEYPAD_KEYS]; |
112 | int rotary_rel_code[2]; | |
1814db69 EM |
113 | |
114 | /* state row bits of each column scan */ | |
115 | uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS]; | |
62059d9e EM |
116 | uint32_t direct_key_state; |
117 | ||
118 | unsigned int direct_key_mask; | |
1814db69 EM |
119 | }; |
120 | ||
e4156979 CX |
121 | #ifdef CONFIG_OF |
122 | static int pxa27x_keypad_matrix_key_parse_dt(struct pxa27x_keypad *keypad) | |
123 | { | |
124 | struct input_dev *input_dev = keypad->input_dev; | |
125 | struct device *dev = input_dev->dev.parent; | |
126 | struct pxa27x_keypad_platform_data *pdata = keypad->pdata; | |
127 | u32 rows, cols; | |
128 | int error; | |
129 | ||
130 | error = matrix_keypad_parse_of_params(dev, &rows, &cols); | |
131 | if (error) | |
132 | return error; | |
133 | ||
134 | if (rows > MAX_MATRIX_KEY_ROWS || cols > MAX_MATRIX_KEY_COLS) { | |
135 | dev_err(dev, "rows or cols exceeds maximum value\n"); | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
139 | pdata->matrix_key_rows = rows; | |
140 | pdata->matrix_key_cols = cols; | |
141 | ||
142 | error = matrix_keypad_build_keymap(NULL, NULL, | |
143 | pdata->matrix_key_rows, | |
144 | pdata->matrix_key_cols, | |
145 | keypad->keycodes, input_dev); | |
146 | if (error) | |
147 | return error; | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | static int pxa27x_keypad_direct_key_parse_dt(struct pxa27x_keypad *keypad) | |
153 | { | |
154 | struct input_dev *input_dev = keypad->input_dev; | |
155 | struct device *dev = input_dev->dev.parent; | |
156 | struct pxa27x_keypad_platform_data *pdata = keypad->pdata; | |
157 | struct device_node *np = dev->of_node; | |
158 | const __be16 *prop; | |
159 | unsigned short code; | |
160 | unsigned int proplen, size; | |
161 | int i; | |
162 | int error; | |
163 | ||
164 | error = of_property_read_u32(np, "marvell,direct-key-count", | |
165 | &pdata->direct_key_num); | |
166 | if (error) { | |
167 | /* | |
168 | * If do not have marvel,direct-key-count defined, | |
169 | * it means direct key is not supported. | |
170 | */ | |
171 | return error == -EINVAL ? 0 : error; | |
172 | } | |
173 | ||
174 | error = of_property_read_u32(np, "marvell,direct-key-mask", | |
175 | &pdata->direct_key_mask); | |
176 | if (error) { | |
177 | if (error != -EINVAL) | |
178 | return error; | |
179 | ||
180 | /* | |
181 | * If marvell,direct-key-mask is not defined, driver will use | |
182 | * default value. Default value is set when configure the keypad. | |
183 | */ | |
184 | pdata->direct_key_mask = 0; | |
185 | } | |
186 | ||
187 | pdata->direct_key_low_active = of_property_read_bool(np, | |
188 | "marvell,direct-key-low-active"); | |
189 | ||
190 | prop = of_get_property(np, "marvell,direct-key-map", &proplen); | |
191 | if (!prop) | |
192 | return -EINVAL; | |
193 | ||
194 | if (proplen % sizeof(u16)) | |
195 | return -EINVAL; | |
196 | ||
197 | size = proplen / sizeof(u16); | |
198 | ||
199 | /* Only MAX_DIRECT_KEY_NUM is accepted.*/ | |
200 | if (size > MAX_DIRECT_KEY_NUM) | |
201 | return -EINVAL; | |
202 | ||
203 | for (i = 0; i < size; i++) { | |
204 | code = be16_to_cpup(prop + i); | |
205 | keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = code; | |
206 | __set_bit(code, input_dev->keybit); | |
207 | } | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | static int pxa27x_keypad_rotary_parse_dt(struct pxa27x_keypad *keypad) | |
213 | { | |
214 | const __be32 *prop; | |
215 | int i, relkey_ret; | |
216 | unsigned int code, proplen; | |
217 | const char *rotaryname[2] = { | |
218 | "marvell,rotary0", "marvell,rotary1"}; | |
219 | const char relkeyname[] = {"marvell,rotary-rel-key"}; | |
220 | struct input_dev *input_dev = keypad->input_dev; | |
221 | struct device *dev = input_dev->dev.parent; | |
222 | struct pxa27x_keypad_platform_data *pdata = keypad->pdata; | |
223 | struct device_node *np = dev->of_node; | |
224 | ||
225 | relkey_ret = of_property_read_u32(np, relkeyname, &code); | |
226 | /* if can read correct rotary key-code, we do not need this. */ | |
227 | if (relkey_ret == 0) { | |
228 | unsigned short relcode; | |
229 | ||
230 | /* rotary0 taks lower half, rotary1 taks upper half. */ | |
231 | relcode = code & 0xffff; | |
232 | pdata->rotary0_rel_code = (code & 0xffff); | |
233 | __set_bit(relcode, input_dev->relbit); | |
234 | ||
235 | relcode = code >> 16; | |
236 | pdata->rotary1_rel_code = relcode; | |
237 | __set_bit(relcode, input_dev->relbit); | |
238 | } | |
239 | ||
240 | for (i = 0; i < 2; i++) { | |
241 | prop = of_get_property(np, rotaryname[i], &proplen); | |
242 | /* | |
243 | * If the prop is not set, it means keypad does not need | |
244 | * initialize the rotaryX. | |
245 | */ | |
246 | if (!prop) | |
247 | continue; | |
248 | ||
249 | code = be32_to_cpup(prop); | |
250 | /* | |
251 | * Not all up/down key code are valid. | |
252 | * Now we depends on direct-rel-code. | |
253 | */ | |
254 | if ((!(code & 0xffff) || !(code >> 16)) && relkey_ret) { | |
255 | return relkey_ret; | |
256 | } else { | |
257 | unsigned int n = MAX_MATRIX_KEY_NUM + (i << 1); | |
258 | unsigned short keycode; | |
259 | ||
260 | keycode = code & 0xffff; | |
261 | keypad->keycodes[n] = keycode; | |
262 | __set_bit(keycode, input_dev->keybit); | |
263 | ||
264 | keycode = code >> 16; | |
265 | keypad->keycodes[n + 1] = keycode; | |
266 | __set_bit(keycode, input_dev->keybit); | |
267 | ||
268 | if (i == 0) | |
269 | pdata->rotary0_rel_code = -1; | |
270 | else | |
271 | pdata->rotary1_rel_code = -1; | |
272 | } | |
273 | if (i == 0) | |
274 | pdata->enable_rotary0 = 1; | |
275 | else | |
276 | pdata->enable_rotary1 = 1; | |
277 | } | |
278 | ||
279 | keypad->rotary_rel_code[0] = pdata->rotary0_rel_code; | |
280 | keypad->rotary_rel_code[1] = pdata->rotary1_rel_code; | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | static int pxa27x_keypad_build_keycode_from_dt(struct pxa27x_keypad *keypad) | |
286 | { | |
287 | struct input_dev *input_dev = keypad->input_dev; | |
288 | struct device *dev = input_dev->dev.parent; | |
289 | struct device_node *np = dev->of_node; | |
290 | int error; | |
291 | ||
292 | keypad->pdata = devm_kzalloc(dev, sizeof(*keypad->pdata), | |
293 | GFP_KERNEL); | |
294 | if (!keypad->pdata) { | |
295 | dev_err(dev, "failed to allocate memory for pdata\n"); | |
296 | return -ENOMEM; | |
297 | } | |
298 | ||
299 | error = pxa27x_keypad_matrix_key_parse_dt(keypad); | |
300 | if (error) { | |
301 | dev_err(dev, "failed to parse matrix key\n"); | |
302 | return error; | |
303 | } | |
304 | ||
305 | error = pxa27x_keypad_direct_key_parse_dt(keypad); | |
306 | if (error) { | |
307 | dev_err(dev, "failed to parse direct key\n"); | |
308 | return error; | |
309 | } | |
310 | ||
311 | error = pxa27x_keypad_rotary_parse_dt(keypad); | |
312 | if (error) { | |
313 | dev_err(dev, "failed to parse rotary key\n"); | |
314 | return error; | |
315 | } | |
316 | ||
317 | error = of_property_read_u32(np, "marvell,debounce-interval", | |
318 | &keypad->pdata->debounce_interval); | |
319 | if (error) { | |
320 | dev_err(dev, "failed to parse debpunce-interval\n"); | |
321 | return error; | |
322 | } | |
323 | ||
324 | /* | |
325 | * The keycodes may not only includes matrix key but also the direct | |
326 | * key or rotary key. | |
327 | */ | |
328 | input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes); | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | #else | |
334 | ||
335 | static int pxa27x_keypad_build_keycode_from_dt(struct pxa27x_keypad *keypad) | |
336 | { | |
337 | dev_info(keypad->input_dev->dev.parent, "missing platform data\n"); | |
338 | ||
339 | return -EINVAL; | |
340 | } | |
341 | ||
342 | #endif | |
343 | ||
0a085a94 | 344 | static int pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad) |
1814db69 EM |
345 | { |
346 | struct pxa27x_keypad_platform_data *pdata = keypad->pdata; | |
347 | struct input_dev *input_dev = keypad->input_dev; | |
0a085a94 CX |
348 | const struct matrix_keymap_data *keymap_data = |
349 | pdata ? pdata->matrix_keymap_data : NULL; | |
bd96f378 | 350 | unsigned short keycode; |
1814db69 | 351 | int i; |
0a085a94 | 352 | int error; |
1814db69 | 353 | |
0a085a94 CX |
354 | error = matrix_keypad_build_keymap(keymap_data, NULL, |
355 | pdata->matrix_key_rows, | |
356 | pdata->matrix_key_cols, | |
357 | keypad->keycodes, input_dev); | |
358 | if (error) | |
359 | return error; | |
1814db69 | 360 | |
0a085a94 CX |
361 | /* |
362 | * The keycodes may not only include matrix keys but also the direct | |
363 | * or rotary keys. | |
364 | */ | |
365 | input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes); | |
471637a5 | 366 | |
0a085a94 | 367 | /* For direct keys. */ |
bd96f378 DT |
368 | for (i = 0; i < pdata->direct_key_num; i++) { |
369 | keycode = pdata->direct_key_map[i]; | |
370 | keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = keycode; | |
371 | __set_bit(keycode, input_dev->keybit); | |
372 | } | |
62059d9e | 373 | |
471637a5 AO |
374 | if (pdata->enable_rotary0) { |
375 | if (pdata->rotary0_up_key && pdata->rotary0_down_key) { | |
bd96f378 DT |
376 | keycode = pdata->rotary0_up_key; |
377 | keypad->keycodes[MAX_MATRIX_KEY_NUM + 0] = keycode; | |
378 | __set_bit(keycode, input_dev->keybit); | |
379 | ||
380 | keycode = pdata->rotary0_down_key; | |
381 | keypad->keycodes[MAX_MATRIX_KEY_NUM + 1] = keycode; | |
382 | __set_bit(keycode, input_dev->keybit); | |
383 | ||
384 | keypad->rotary_rel_code[0] = -1; | |
385 | } else { | |
386 | keypad->rotary_rel_code[0] = pdata->rotary0_rel_code; | |
52ec7752 | 387 | __set_bit(pdata->rotary0_rel_code, input_dev->relbit); |
bd96f378 | 388 | } |
471637a5 AO |
389 | } |
390 | ||
391 | if (pdata->enable_rotary1) { | |
392 | if (pdata->rotary1_up_key && pdata->rotary1_down_key) { | |
bd96f378 DT |
393 | keycode = pdata->rotary1_up_key; |
394 | keypad->keycodes[MAX_MATRIX_KEY_NUM + 2] = keycode; | |
395 | __set_bit(keycode, input_dev->keybit); | |
396 | ||
397 | keycode = pdata->rotary1_down_key; | |
398 | keypad->keycodes[MAX_MATRIX_KEY_NUM + 3] = keycode; | |
399 | __set_bit(keycode, input_dev->keybit); | |
400 | ||
401 | keypad->rotary_rel_code[1] = -1; | |
402 | } else { | |
403 | keypad->rotary_rel_code[1] = pdata->rotary1_rel_code; | |
52ec7752 | 404 | __set_bit(pdata->rotary1_rel_code, input_dev->relbit); |
bd96f378 | 405 | } |
471637a5 | 406 | } |
1814db69 | 407 | |
bd96f378 | 408 | __clear_bit(KEY_RESERVED, input_dev->keybit); |
0a085a94 CX |
409 | |
410 | return 0; | |
1814db69 EM |
411 | } |
412 | ||
413 | static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad) | |
414 | { | |
415 | struct pxa27x_keypad_platform_data *pdata = keypad->pdata; | |
bd96f378 | 416 | struct input_dev *input_dev = keypad->input_dev; |
1814db69 EM |
417 | int row, col, num_keys_pressed = 0; |
418 | uint32_t new_state[MAX_MATRIX_KEY_COLS]; | |
9c60debd | 419 | uint32_t kpas = keypad_readl(KPAS); |
1814db69 EM |
420 | |
421 | num_keys_pressed = KPAS_MUKP(kpas); | |
422 | ||
423 | memset(new_state, 0, sizeof(new_state)); | |
424 | ||
425 | if (num_keys_pressed == 0) | |
426 | goto scan; | |
427 | ||
428 | if (num_keys_pressed == 1) { | |
429 | col = KPAS_CP(kpas); | |
430 | row = KPAS_RP(kpas); | |
431 | ||
432 | /* if invalid row/col, treat as no key pressed */ | |
433 | if (col >= pdata->matrix_key_cols || | |
434 | row >= pdata->matrix_key_rows) | |
435 | goto scan; | |
436 | ||
437 | new_state[col] = (1 << row); | |
438 | goto scan; | |
439 | } | |
440 | ||
441 | if (num_keys_pressed > 1) { | |
9c60debd EM |
442 | uint32_t kpasmkp0 = keypad_readl(KPASMKP0); |
443 | uint32_t kpasmkp1 = keypad_readl(KPASMKP1); | |
444 | uint32_t kpasmkp2 = keypad_readl(KPASMKP2); | |
445 | uint32_t kpasmkp3 = keypad_readl(KPASMKP3); | |
1814db69 EM |
446 | |
447 | new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK; | |
448 | new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK; | |
449 | new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK; | |
450 | new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK; | |
451 | new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK; | |
452 | new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK; | |
453 | new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK; | |
454 | new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK; | |
455 | } | |
456 | scan: | |
457 | for (col = 0; col < pdata->matrix_key_cols; col++) { | |
458 | uint32_t bits_changed; | |
bd96f378 | 459 | int code; |
1814db69 EM |
460 | |
461 | bits_changed = keypad->matrix_key_state[col] ^ new_state[col]; | |
462 | if (bits_changed == 0) | |
463 | continue; | |
464 | ||
465 | for (row = 0; row < pdata->matrix_key_rows; row++) { | |
466 | if ((bits_changed & (1 << row)) == 0) | |
467 | continue; | |
468 | ||
bd96f378 DT |
469 | code = MATRIX_SCAN_CODE(row, col, MATRIX_ROW_SHIFT); |
470 | input_event(input_dev, EV_MSC, MSC_SCAN, code); | |
471 | input_report_key(input_dev, keypad->keycodes[code], | |
472 | new_state[col] & (1 << row)); | |
1814db69 EM |
473 | } |
474 | } | |
bd96f378 | 475 | input_sync(input_dev); |
1814db69 EM |
476 | memcpy(keypad->matrix_key_state, new_state, sizeof(new_state)); |
477 | } | |
22d8a73a | 478 | |
d7416f9e EM |
479 | #define DEFAULT_KPREC (0x007f007f) |
480 | ||
62059d9e EM |
481 | static inline int rotary_delta(uint32_t kprec) |
482 | { | |
483 | if (kprec & KPREC_OF0) | |
484 | return (kprec & 0xff) + 0x7f; | |
485 | else if (kprec & KPREC_UF0) | |
486 | return (kprec & 0xff) - 0x7f - 0xff; | |
487 | else | |
488 | return (kprec & 0xff) - 0x7f; | |
489 | } | |
490 | ||
491 | static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta) | |
492 | { | |
493 | struct input_dev *dev = keypad->input_dev; | |
494 | ||
495 | if (delta == 0) | |
496 | return; | |
497 | ||
bd96f378 DT |
498 | if (keypad->rotary_rel_code[r] == -1) { |
499 | int code = MAX_MATRIX_KEY_NUM + 2 * r + (delta > 0 ? 0 : 1); | |
500 | unsigned char keycode = keypad->keycodes[code]; | |
62059d9e EM |
501 | |
502 | /* simulate a press-n-release */ | |
bd96f378 | 503 | input_event(dev, EV_MSC, MSC_SCAN, code); |
62059d9e EM |
504 | input_report_key(dev, keycode, 1); |
505 | input_sync(dev); | |
bd96f378 | 506 | input_event(dev, EV_MSC, MSC_SCAN, code); |
62059d9e EM |
507 | input_report_key(dev, keycode, 0); |
508 | input_sync(dev); | |
509 | } else { | |
510 | input_report_rel(dev, keypad->rotary_rel_code[r], delta); | |
511 | input_sync(dev); | |
512 | } | |
513 | } | |
514 | ||
515 | static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad) | |
516 | { | |
517 | struct pxa27x_keypad_platform_data *pdata = keypad->pdata; | |
518 | uint32_t kprec; | |
519 | ||
520 | /* read and reset to default count value */ | |
9c60debd EM |
521 | kprec = keypad_readl(KPREC); |
522 | keypad_writel(KPREC, DEFAULT_KPREC); | |
62059d9e EM |
523 | |
524 | if (pdata->enable_rotary0) | |
525 | report_rotary_event(keypad, 0, rotary_delta(kprec)); | |
526 | ||
527 | if (pdata->enable_rotary1) | |
528 | report_rotary_event(keypad, 1, rotary_delta(kprec >> 16)); | |
529 | } | |
530 | ||
531 | static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad) | |
532 | { | |
533 | struct pxa27x_keypad_platform_data *pdata = keypad->pdata; | |
bd96f378 | 534 | struct input_dev *input_dev = keypad->input_dev; |
62059d9e EM |
535 | unsigned int new_state; |
536 | uint32_t kpdk, bits_changed; | |
537 | int i; | |
538 | ||
9c60debd | 539 | kpdk = keypad_readl(KPDK); |
62059d9e EM |
540 | |
541 | if (pdata->enable_rotary0 || pdata->enable_rotary1) | |
542 | pxa27x_keypad_scan_rotary(keypad); | |
543 | ||
ee1d8040 CX |
544 | /* |
545 | * The KPDR_DK only output the key pin level, so it relates to board, | |
546 | * and low level may be active. | |
547 | */ | |
548 | if (pdata->direct_key_low_active) | |
549 | new_state = ~KPDK_DK(kpdk) & keypad->direct_key_mask; | |
550 | else | |
551 | new_state = KPDK_DK(kpdk) & keypad->direct_key_mask; | |
552 | ||
62059d9e EM |
553 | bits_changed = keypad->direct_key_state ^ new_state; |
554 | ||
555 | if (bits_changed == 0) | |
556 | return; | |
557 | ||
558 | for (i = 0; i < pdata->direct_key_num; i++) { | |
bd96f378 DT |
559 | if (bits_changed & (1 << i)) { |
560 | int code = MAX_MATRIX_KEY_NUM + i; | |
561 | ||
562 | input_event(input_dev, EV_MSC, MSC_SCAN, code); | |
563 | input_report_key(input_dev, keypad->keycodes[code], | |
564 | new_state & (1 << i)); | |
565 | } | |
62059d9e | 566 | } |
bd96f378 | 567 | input_sync(input_dev); |
62059d9e EM |
568 | keypad->direct_key_state = new_state; |
569 | } | |
570 | ||
3587c258 MB |
571 | static void clear_wakeup_event(struct pxa27x_keypad *keypad) |
572 | { | |
573 | struct pxa27x_keypad_platform_data *pdata = keypad->pdata; | |
574 | ||
575 | if (pdata->clear_wakeup_event) | |
576 | (pdata->clear_wakeup_event)(); | |
577 | } | |
578 | ||
0e5f11aa | 579 | static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id) |
5a90e5bc | 580 | { |
1814db69 | 581 | struct pxa27x_keypad *keypad = dev_id; |
9c60debd | 582 | unsigned long kpc = keypad_readl(KPC); |
62059d9e | 583 | |
3587c258 MB |
584 | clear_wakeup_event(keypad); |
585 | ||
62059d9e EM |
586 | if (kpc & KPC_DI) |
587 | pxa27x_keypad_scan_direct(keypad); | |
5a90e5bc | 588 | |
1814db69 EM |
589 | if (kpc & KPC_MI) |
590 | pxa27x_keypad_scan_matrix(keypad); | |
5a90e5bc RG |
591 | |
592 | return IRQ_HANDLED; | |
593 | } | |
594 | ||
d7416f9e | 595 | static void pxa27x_keypad_config(struct pxa27x_keypad *keypad) |
5a90e5bc | 596 | { |
d7416f9e | 597 | struct pxa27x_keypad_platform_data *pdata = keypad->pdata; |
62059d9e | 598 | unsigned int mask = 0, direct_key_num = 0; |
d7416f9e | 599 | unsigned long kpc = 0; |
1814db69 | 600 | |
904adede VK |
601 | /* clear pending interrupt bit */ |
602 | keypad_readl(KPC); | |
603 | ||
d7416f9e EM |
604 | /* enable matrix keys with automatic scan */ |
605 | if (pdata->matrix_key_rows && pdata->matrix_key_cols) { | |
606 | kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL; | |
607 | kpc |= KPC_MKRN(pdata->matrix_key_rows) | | |
608 | KPC_MKCN(pdata->matrix_key_cols); | |
609 | } | |
5a90e5bc | 610 | |
62059d9e EM |
611 | /* enable rotary key, debounce interval same as direct keys */ |
612 | if (pdata->enable_rotary0) { | |
613 | mask |= 0x03; | |
614 | direct_key_num = 2; | |
615 | kpc |= KPC_REE0; | |
616 | } | |
617 | ||
618 | if (pdata->enable_rotary1) { | |
619 | mask |= 0x0c; | |
620 | direct_key_num = 4; | |
621 | kpc |= KPC_REE1; | |
622 | } | |
623 | ||
624 | if (pdata->direct_key_num > direct_key_num) | |
625 | direct_key_num = pdata->direct_key_num; | |
626 | ||
fb054bf2 CX |
627 | /* |
628 | * Direct keys usage may not start from KP_DKIN0, check the platfrom | |
629 | * mask data to config the specific. | |
630 | */ | |
631 | if (pdata->direct_key_mask) | |
632 | keypad->direct_key_mask = pdata->direct_key_mask; | |
633 | else | |
634 | keypad->direct_key_mask = ((1 << direct_key_num) - 1) & ~mask; | |
62059d9e EM |
635 | |
636 | /* enable direct key */ | |
637 | if (direct_key_num) | |
638 | kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num); | |
5a90e5bc | 639 | |
9c60debd EM |
640 | keypad_writel(KPC, kpc | KPC_RE_ZERO_DEB); |
641 | keypad_writel(KPREC, DEFAULT_KPREC); | |
76cb44e1 | 642 | keypad_writel(KPKDI, pdata->debounce_interval); |
d7416f9e EM |
643 | } |
644 | ||
645 | static int pxa27x_keypad_open(struct input_dev *dev) | |
646 | { | |
647 | struct pxa27x_keypad *keypad = input_get_drvdata(dev); | |
5a90e5bc RG |
648 | |
649 | /* Enable unit clock */ | |
6ce34a5f | 650 | clk_prepare_enable(keypad->clk); |
d7416f9e | 651 | pxa27x_keypad_config(keypad); |
5a90e5bc RG |
652 | |
653 | return 0; | |
654 | } | |
655 | ||
0e5f11aa | 656 | static void pxa27x_keypad_close(struct input_dev *dev) |
5a90e5bc | 657 | { |
1814db69 EM |
658 | struct pxa27x_keypad *keypad = input_get_drvdata(dev); |
659 | ||
5a90e5bc | 660 | /* Disable clock unit */ |
6ce34a5f | 661 | clk_disable_unprepare(keypad->clk); |
5a90e5bc RG |
662 | } |
663 | ||
664 | #ifdef CONFIG_PM | |
b0010911 | 665 | static int pxa27x_keypad_suspend(struct device *dev) |
5a90e5bc | 666 | { |
b0010911 | 667 | struct platform_device *pdev = to_platform_device(dev); |
1814db69 | 668 | struct pxa27x_keypad *keypad = platform_get_drvdata(pdev); |
5a90e5bc | 669 | |
6ce34a5f CX |
670 | /* |
671 | * If the keypad is used a wake up source, clock can not be disabled. | |
672 | * Or it can not detect the key pressing. | |
673 | */ | |
39ab9dde EM |
674 | if (device_may_wakeup(&pdev->dev)) |
675 | enable_irq_wake(keypad->irq); | |
6ce34a5f CX |
676 | else |
677 | clk_disable_unprepare(keypad->clk); | |
39ab9dde | 678 | |
5a90e5bc RG |
679 | return 0; |
680 | } | |
681 | ||
b0010911 | 682 | static int pxa27x_keypad_resume(struct device *dev) |
5a90e5bc | 683 | { |
b0010911 | 684 | struct platform_device *pdev = to_platform_device(dev); |
1814db69 | 685 | struct pxa27x_keypad *keypad = platform_get_drvdata(pdev); |
1814db69 | 686 | struct input_dev *input_dev = keypad->input_dev; |
5a90e5bc | 687 | |
6ce34a5f CX |
688 | /* |
689 | * If the keypad is used as wake up source, the clock is not turned | |
690 | * off. So do not need configure it again. | |
691 | */ | |
692 | if (device_may_wakeup(&pdev->dev)) { | |
39ab9dde | 693 | disable_irq_wake(keypad->irq); |
6ce34a5f CX |
694 | } else { |
695 | mutex_lock(&input_dev->mutex); | |
39ab9dde | 696 | |
6ce34a5f CX |
697 | if (input_dev->users) { |
698 | /* Enable unit clock */ | |
699 | clk_prepare_enable(keypad->clk); | |
700 | pxa27x_keypad_config(keypad); | |
701 | } | |
5a90e5bc | 702 | |
6ce34a5f | 703 | mutex_unlock(&input_dev->mutex); |
5a90e5bc RG |
704 | } |
705 | ||
5a90e5bc RG |
706 | return 0; |
707 | } | |
b0010911 DT |
708 | |
709 | static const struct dev_pm_ops pxa27x_keypad_pm_ops = { | |
710 | .suspend = pxa27x_keypad_suspend, | |
711 | .resume = pxa27x_keypad_resume, | |
712 | }; | |
5a90e5bc RG |
713 | #endif |
714 | ||
5298cc4c | 715 | static int pxa27x_keypad_probe(struct platform_device *pdev) |
5a90e5bc | 716 | { |
bd96f378 | 717 | struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data; |
e4156979 | 718 | struct device_node *np = pdev->dev.of_node; |
1814db69 | 719 | struct pxa27x_keypad *keypad; |
5a90e5bc | 720 | struct input_dev *input_dev; |
9c60debd EM |
721 | struct resource *res; |
722 | int irq, error; | |
5a90e5bc | 723 | |
e4156979 CX |
724 | /* Driver need build keycode from device tree or pdata */ |
725 | if (!np && !pdata) | |
bd96f378 | 726 | return -EINVAL; |
1814db69 | 727 | |
9c60debd EM |
728 | irq = platform_get_irq(pdev, 0); |
729 | if (irq < 0) { | |
730 | dev_err(&pdev->dev, "failed to get keypad irq\n"); | |
bd96f378 | 731 | return -ENXIO; |
9c60debd EM |
732 | } |
733 | ||
734 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
735 | if (res == NULL) { | |
736 | dev_err(&pdev->dev, "failed to get I/O memory\n"); | |
bd96f378 DT |
737 | return -ENXIO; |
738 | } | |
739 | ||
740 | keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL); | |
741 | input_dev = input_allocate_device(); | |
742 | if (!keypad || !input_dev) { | |
743 | dev_err(&pdev->dev, "failed to allocate memory\n"); | |
744 | error = -ENOMEM; | |
9c60debd EM |
745 | goto failed_free; |
746 | } | |
747 | ||
bd96f378 DT |
748 | keypad->pdata = pdata; |
749 | keypad->input_dev = input_dev; | |
750 | keypad->irq = irq; | |
751 | ||
52ec7752 | 752 | res = request_mem_region(res->start, resource_size(res), pdev->name); |
9c60debd EM |
753 | if (res == NULL) { |
754 | dev_err(&pdev->dev, "failed to request I/O memory\n"); | |
755 | error = -EBUSY; | |
756 | goto failed_free; | |
757 | } | |
758 | ||
52ec7752 | 759 | keypad->mmio_base = ioremap(res->start, resource_size(res)); |
9c60debd EM |
760 | if (keypad->mmio_base == NULL) { |
761 | dev_err(&pdev->dev, "failed to remap I/O memory\n"); | |
762 | error = -ENXIO; | |
763 | goto failed_free_mem; | |
764 | } | |
765 | ||
e0d8b13a | 766 | keypad->clk = clk_get(&pdev->dev, NULL); |
1814db69 EM |
767 | if (IS_ERR(keypad->clk)) { |
768 | dev_err(&pdev->dev, "failed to get keypad clock\n"); | |
769 | error = PTR_ERR(keypad->clk); | |
9c60debd | 770 | goto failed_free_io; |
22d8a73a RK |
771 | } |
772 | ||
9c60debd | 773 | input_dev->name = pdev->name; |
5a90e5bc | 774 | input_dev->id.bustype = BUS_HOST; |
0e5f11aa EM |
775 | input_dev->open = pxa27x_keypad_open; |
776 | input_dev->close = pxa27x_keypad_close; | |
469ba4df | 777 | input_dev->dev.parent = &pdev->dev; |
5a90e5bc | 778 | |
bd96f378 DT |
779 | input_dev->keycode = keypad->keycodes; |
780 | input_dev->keycodesize = sizeof(keypad->keycodes[0]); | |
781 | input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes); | |
782 | ||
1814db69 EM |
783 | input_set_drvdata(input_dev, keypad); |
784 | ||
471637a5 | 785 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); |
bd96f378 | 786 | input_set_capability(input_dev, EV_MSC, MSC_SCAN); |
1814db69 | 787 | |
e4156979 CX |
788 | if (pdata) |
789 | error = pxa27x_keypad_build_keycode(keypad); | |
790 | else | |
791 | error = pxa27x_keypad_build_keycode_from_dt(keypad); | |
0a085a94 CX |
792 | if (error) { |
793 | dev_err(&pdev->dev, "failed to build keycode\n"); | |
794 | goto failed_put_clk; | |
795 | } | |
bd96f378 | 796 | |
e4156979 CX |
797 | /* If device tree is supported, pdata will be allocated. */ |
798 | pdata = keypad->pdata; | |
799 | ||
bd96f378 DT |
800 | if ((pdata->enable_rotary0 && keypad->rotary_rel_code[0] != -1) || |
801 | (pdata->enable_rotary1 && keypad->rotary_rel_code[1] != -1)) { | |
802 | input_dev->evbit[0] |= BIT_MASK(EV_REL); | |
803 | } | |
5a90e5bc | 804 | |
ec4665c4 | 805 | error = request_irq(irq, pxa27x_keypad_irq_handler, 0, |
9c60debd | 806 | pdev->name, keypad); |
5a90e5bc | 807 | if (error) { |
9c60debd | 808 | dev_err(&pdev->dev, "failed to request IRQ\n"); |
bd96f378 | 809 | goto failed_put_clk; |
5a90e5bc RG |
810 | } |
811 | ||
5a90e5bc RG |
812 | /* Register the input device */ |
813 | error = input_register_device(input_dev); | |
9c60debd EM |
814 | if (error) { |
815 | dev_err(&pdev->dev, "failed to register input device\n"); | |
816 | goto failed_free_irq; | |
817 | } | |
5a90e5bc | 818 | |
bd96f378 | 819 | platform_set_drvdata(pdev, keypad); |
39ab9dde EM |
820 | device_init_wakeup(&pdev->dev, 1); |
821 | ||
5a90e5bc RG |
822 | return 0; |
823 | ||
9c60debd | 824 | failed_free_irq: |
8c7f5f58 | 825 | free_irq(irq, keypad); |
1814db69 EM |
826 | failed_put_clk: |
827 | clk_put(keypad->clk); | |
9c60debd EM |
828 | failed_free_io: |
829 | iounmap(keypad->mmio_base); | |
830 | failed_free_mem: | |
52ec7752 | 831 | release_mem_region(res->start, resource_size(res)); |
1814db69 | 832 | failed_free: |
bd96f378 | 833 | input_free_device(input_dev); |
1814db69 | 834 | kfree(keypad); |
5a90e5bc RG |
835 | return error; |
836 | } | |
837 | ||
e2619cf7 | 838 | static int pxa27x_keypad_remove(struct platform_device *pdev) |
5a90e5bc | 839 | { |
1814db69 | 840 | struct pxa27x_keypad *keypad = platform_get_drvdata(pdev); |
9c60debd | 841 | struct resource *res; |
5a90e5bc | 842 | |
8c7f5f58 | 843 | free_irq(keypad->irq, keypad); |
1814db69 EM |
844 | clk_put(keypad->clk); |
845 | ||
846 | input_unregister_device(keypad->input_dev); | |
9c60debd EM |
847 | iounmap(keypad->mmio_base); |
848 | ||
849 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
52ec7752 | 850 | release_mem_region(res->start, resource_size(res)); |
1814db69 | 851 | |
1814db69 | 852 | kfree(keypad); |
bd96f378 | 853 | |
5a90e5bc RG |
854 | return 0; |
855 | } | |
856 | ||
d7b5247b KS |
857 | /* work with hotplug and coldplug */ |
858 | MODULE_ALIAS("platform:pxa27x-keypad"); | |
859 | ||
e4156979 CX |
860 | #ifdef CONFIG_OF |
861 | static const struct of_device_id pxa27x_keypad_dt_match[] = { | |
862 | { .compatible = "marvell,pxa27x-keypad" }, | |
863 | {}, | |
864 | }; | |
865 | MODULE_DEVICE_TABLE(of, pxa27x_keypad_dt_match); | |
866 | #endif | |
867 | ||
0e5f11aa EM |
868 | static struct platform_driver pxa27x_keypad_driver = { |
869 | .probe = pxa27x_keypad_probe, | |
1cb0aa88 | 870 | .remove = pxa27x_keypad_remove, |
5a90e5bc | 871 | .driver = { |
9c60debd | 872 | .name = "pxa27x-keypad", |
e4156979 | 873 | .of_match_table = of_match_ptr(pxa27x_keypad_dt_match), |
d7b5247b | 874 | .owner = THIS_MODULE, |
b0010911 DT |
875 | #ifdef CONFIG_PM |
876 | .pm = &pxa27x_keypad_pm_ops, | |
877 | #endif | |
5a90e5bc RG |
878 | }, |
879 | }; | |
5146c84f | 880 | module_platform_driver(pxa27x_keypad_driver); |
5a90e5bc | 881 | |
0e5f11aa | 882 | MODULE_DESCRIPTION("PXA27x Keypad Controller Driver"); |
5a90e5bc | 883 | MODULE_LICENSE("GPL"); |