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> | |
5a90e5bc RG |
21 | #include <linux/interrupt.h> |
22 | #include <linux/input.h> | |
d0542677 | 23 | #include <linux/io.h> |
5a90e5bc RG |
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> |
95ba7407 | 30 | #include <linux/of.h> |
5a90e5bc | 31 | |
293b2da1 | 32 | #include <linux/platform_data/keypad-pxa27x.h> |
9c60debd EM |
33 | /* |
34 | * Keypad Controller registers | |
35 | */ | |
36 | #define KPC 0x0000 /* Keypad Control register */ | |
37 | #define KPDK 0x0008 /* Keypad Direct Key register */ | |
38 | #define KPREC 0x0010 /* Keypad Rotary Encoder register */ | |
39 | #define KPMK 0x0018 /* Keypad Matrix Key register */ | |
40 | #define KPAS 0x0020 /* Keypad Automatic Scan register */ | |
41 | ||
42 | /* Keypad Automatic Scan Multiple Key Presser register 0-3 */ | |
43 | #define KPASMKP0 0x0028 | |
44 | #define KPASMKP1 0x0030 | |
45 | #define KPASMKP2 0x0038 | |
46 | #define KPASMKP3 0x0040 | |
47 | #define KPKDI 0x0048 | |
48 | ||
49 | /* bit definitions */ | |
688dad4f SO |
50 | #define KPC_MKRN(n) ((((n) - 1) & 0x7) << 26) /* matrix key row number */ |
51 | #define KPC_MKCN(n) ((((n) - 1) & 0x7) << 23) /* matrix key column number */ | |
52 | #define KPC_DKN(n) ((((n) - 1) & 0x7) << 6) /* direct key number */ | |
d7416f9e | 53 | |
9c60debd EM |
54 | #define KPC_AS (0x1 << 30) /* Automatic Scan bit */ |
55 | #define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */ | |
56 | #define KPC_MI (0x1 << 22) /* Matrix interrupt bit */ | |
57 | #define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */ | |
58 | ||
59 | #define KPC_MS(n) (0x1 << (13 + (n))) /* Matrix scan line 'n' */ | |
60 | #define KPC_MS_ALL (0xff << 13) | |
61 | ||
62 | #define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */ | |
63 | #define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */ | |
64 | #define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */ | |
65 | #define KPC_DI (0x1 << 5) /* Direct key interrupt bit */ | |
66 | #define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */ | |
67 | #define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */ | |
68 | #define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */ | |
69 | #define KPC_DE (0x1 << 1) /* Direct Keypad Enable */ | |
70 | #define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */ | |
71 | ||
62059d9e EM |
72 | #define KPDK_DKP (0x1 << 31) |
73 | #define KPDK_DK(n) ((n) & 0xff) | |
74 | ||
9c60debd EM |
75 | #define KPREC_OF1 (0x1 << 31) |
76 | #define kPREC_UF1 (0x1 << 30) | |
77 | #define KPREC_OF0 (0x1 << 15) | |
78 | #define KPREC_UF0 (0x1 << 14) | |
79 | ||
80 | #define KPREC_RECOUNT0(n) ((n) & 0xff) | |
81 | #define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff) | |
82 | ||
83 | #define KPMK_MKP (0x1 << 31) | |
84 | #define KPAS_SO (0x1 << 31) | |
85 | #define KPASMKPx_SO (0x1 << 31) | |
86 | ||
87 | #define KPAS_MUKP(n) (((n) >> 26) & 0x1f) | |
88 | #define KPAS_RP(n) (((n) >> 4) & 0xf) | |
89 | #define KPAS_CP(n) ((n) & 0xf) | |
5a90e5bc | 90 | |
1814db69 EM |
91 | #define KPASMKP_MKC_MASK (0xff) |
92 | ||
9c60debd EM |
93 | #define keypad_readl(off) __raw_readl(keypad->mmio_base + (off)) |
94 | #define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off)) | |
95 | ||
bd96f378 DT |
96 | #define MAX_MATRIX_KEY_NUM (MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS) |
97 | #define MAX_KEYPAD_KEYS (MAX_MATRIX_KEY_NUM + MAX_DIRECT_KEY_NUM) | |
1814db69 EM |
98 | |
99 | struct pxa27x_keypad { | |
9eb52139 | 100 | const struct pxa27x_keypad_platform_data *pdata; |
1814db69 EM |
101 | |
102 | struct clk *clk; | |
103 | struct input_dev *input_dev; | |
9c60debd | 104 | void __iomem *mmio_base; |
1814db69 | 105 | |
39ab9dde EM |
106 | int irq; |
107 | ||
bd96f378 DT |
108 | unsigned short keycodes[MAX_KEYPAD_KEYS]; |
109 | int rotary_rel_code[2]; | |
1814db69 | 110 | |
c5ec1948 CX |
111 | unsigned int row_shift; |
112 | ||
1814db69 EM |
113 | /* state row bits of each column scan */ |
114 | uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS]; | |
62059d9e EM |
115 | uint32_t direct_key_state; |
116 | ||
117 | unsigned int direct_key_mask; | |
1814db69 EM |
118 | }; |
119 | ||
e4156979 | 120 | #ifdef CONFIG_OF |
9eb52139 DT |
121 | static int pxa27x_keypad_matrix_key_parse_dt(struct pxa27x_keypad *keypad, |
122 | struct pxa27x_keypad_platform_data *pdata) | |
e4156979 CX |
123 | { |
124 | struct input_dev *input_dev = keypad->input_dev; | |
125 | struct device *dev = input_dev->dev.parent; | |
e4156979 CX |
126 | u32 rows, cols; |
127 | int error; | |
128 | ||
129 | error = matrix_keypad_parse_of_params(dev, &rows, &cols); | |
130 | if (error) | |
131 | return error; | |
132 | ||
133 | if (rows > MAX_MATRIX_KEY_ROWS || cols > MAX_MATRIX_KEY_COLS) { | |
134 | dev_err(dev, "rows or cols exceeds maximum value\n"); | |
135 | return -EINVAL; | |
136 | } | |
137 | ||
138 | pdata->matrix_key_rows = rows; | |
139 | pdata->matrix_key_cols = cols; | |
140 | ||
141 | error = matrix_keypad_build_keymap(NULL, NULL, | |
142 | pdata->matrix_key_rows, | |
143 | pdata->matrix_key_cols, | |
144 | keypad->keycodes, input_dev); | |
145 | if (error) | |
146 | return error; | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
9eb52139 DT |
151 | static int pxa27x_keypad_direct_key_parse_dt(struct pxa27x_keypad *keypad, |
152 | struct pxa27x_keypad_platform_data *pdata) | |
e4156979 CX |
153 | { |
154 | struct input_dev *input_dev = keypad->input_dev; | |
155 | struct device *dev = input_dev->dev.parent; | |
e4156979 CX |
156 | struct device_node *np = dev->of_node; |
157 | const __be16 *prop; | |
158 | unsigned short code; | |
159 | unsigned int proplen, size; | |
160 | int i; | |
161 | int error; | |
162 | ||
163 | error = of_property_read_u32(np, "marvell,direct-key-count", | |
164 | &pdata->direct_key_num); | |
165 | if (error) { | |
166 | /* | |
167 | * If do not have marvel,direct-key-count defined, | |
168 | * it means direct key is not supported. | |
169 | */ | |
170 | return error == -EINVAL ? 0 : error; | |
171 | } | |
172 | ||
173 | error = of_property_read_u32(np, "marvell,direct-key-mask", | |
174 | &pdata->direct_key_mask); | |
175 | if (error) { | |
176 | if (error != -EINVAL) | |
177 | return error; | |
178 | ||
179 | /* | |
180 | * If marvell,direct-key-mask is not defined, driver will use | |
181 | * default value. Default value is set when configure the keypad. | |
182 | */ | |
183 | pdata->direct_key_mask = 0; | |
184 | } | |
185 | ||
186 | pdata->direct_key_low_active = of_property_read_bool(np, | |
187 | "marvell,direct-key-low-active"); | |
188 | ||
189 | prop = of_get_property(np, "marvell,direct-key-map", &proplen); | |
190 | if (!prop) | |
191 | return -EINVAL; | |
192 | ||
193 | if (proplen % sizeof(u16)) | |
194 | return -EINVAL; | |
195 | ||
196 | size = proplen / sizeof(u16); | |
197 | ||
198 | /* Only MAX_DIRECT_KEY_NUM is accepted.*/ | |
199 | if (size > MAX_DIRECT_KEY_NUM) | |
200 | return -EINVAL; | |
201 | ||
202 | for (i = 0; i < size; i++) { | |
203 | code = be16_to_cpup(prop + i); | |
204 | keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = code; | |
205 | __set_bit(code, input_dev->keybit); | |
206 | } | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
9eb52139 DT |
211 | static int pxa27x_keypad_rotary_parse_dt(struct pxa27x_keypad *keypad, |
212 | struct pxa27x_keypad_platform_data *pdata) | |
e4156979 CX |
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; | |
e4156979 CX |
222 | struct device_node *np = dev->of_node; |
223 | ||
224 | relkey_ret = of_property_read_u32(np, relkeyname, &code); | |
225 | /* if can read correct rotary key-code, we do not need this. */ | |
226 | if (relkey_ret == 0) { | |
227 | unsigned short relcode; | |
228 | ||
229 | /* rotary0 taks lower half, rotary1 taks upper half. */ | |
230 | relcode = code & 0xffff; | |
231 | pdata->rotary0_rel_code = (code & 0xffff); | |
232 | __set_bit(relcode, input_dev->relbit); | |
233 | ||
234 | relcode = code >> 16; | |
235 | pdata->rotary1_rel_code = relcode; | |
236 | __set_bit(relcode, input_dev->relbit); | |
237 | } | |
238 | ||
239 | for (i = 0; i < 2; i++) { | |
240 | prop = of_get_property(np, rotaryname[i], &proplen); | |
241 | /* | |
242 | * If the prop is not set, it means keypad does not need | |
243 | * initialize the rotaryX. | |
244 | */ | |
245 | if (!prop) | |
246 | continue; | |
247 | ||
248 | code = be32_to_cpup(prop); | |
249 | /* | |
250 | * Not all up/down key code are valid. | |
251 | * Now we depends on direct-rel-code. | |
252 | */ | |
253 | if ((!(code & 0xffff) || !(code >> 16)) && relkey_ret) { | |
254 | return relkey_ret; | |
255 | } else { | |
256 | unsigned int n = MAX_MATRIX_KEY_NUM + (i << 1); | |
257 | unsigned short keycode; | |
258 | ||
259 | keycode = code & 0xffff; | |
260 | keypad->keycodes[n] = keycode; | |
261 | __set_bit(keycode, input_dev->keybit); | |
262 | ||
263 | keycode = code >> 16; | |
264 | keypad->keycodes[n + 1] = keycode; | |
265 | __set_bit(keycode, input_dev->keybit); | |
266 | ||
267 | if (i == 0) | |
268 | pdata->rotary0_rel_code = -1; | |
269 | else | |
270 | pdata->rotary1_rel_code = -1; | |
271 | } | |
272 | if (i == 0) | |
273 | pdata->enable_rotary0 = 1; | |
274 | else | |
275 | pdata->enable_rotary1 = 1; | |
276 | } | |
277 | ||
278 | keypad->rotary_rel_code[0] = pdata->rotary0_rel_code; | |
279 | keypad->rotary_rel_code[1] = pdata->rotary1_rel_code; | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | static int pxa27x_keypad_build_keycode_from_dt(struct pxa27x_keypad *keypad) | |
285 | { | |
286 | struct input_dev *input_dev = keypad->input_dev; | |
287 | struct device *dev = input_dev->dev.parent; | |
288 | struct device_node *np = dev->of_node; | |
9eb52139 | 289 | struct pxa27x_keypad_platform_data *pdata; |
e4156979 CX |
290 | int error; |
291 | ||
9eb52139 DT |
292 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
293 | if (!pdata) { | |
e4156979 CX |
294 | dev_err(dev, "failed to allocate memory for pdata\n"); |
295 | return -ENOMEM; | |
296 | } | |
297 | ||
9eb52139 | 298 | error = pxa27x_keypad_matrix_key_parse_dt(keypad, pdata); |
e4156979 CX |
299 | if (error) { |
300 | dev_err(dev, "failed to parse matrix key\n"); | |
301 | return error; | |
302 | } | |
303 | ||
9eb52139 | 304 | error = pxa27x_keypad_direct_key_parse_dt(keypad, pdata); |
e4156979 CX |
305 | if (error) { |
306 | dev_err(dev, "failed to parse direct key\n"); | |
307 | return error; | |
308 | } | |
309 | ||
9eb52139 | 310 | error = pxa27x_keypad_rotary_parse_dt(keypad, pdata); |
e4156979 CX |
311 | if (error) { |
312 | dev_err(dev, "failed to parse rotary key\n"); | |
313 | return error; | |
314 | } | |
315 | ||
316 | error = of_property_read_u32(np, "marvell,debounce-interval", | |
9eb52139 | 317 | &pdata->debounce_interval); |
e4156979 CX |
318 | if (error) { |
319 | dev_err(dev, "failed to parse debpunce-interval\n"); | |
320 | return error; | |
321 | } | |
322 | ||
323 | /* | |
324 | * The keycodes may not only includes matrix key but also the direct | |
325 | * key or rotary key. | |
326 | */ | |
327 | input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes); | |
328 | ||
9eb52139 | 329 | keypad->pdata = pdata; |
e4156979 CX |
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 | 345 | { |
9eb52139 | 346 | const struct pxa27x_keypad_platform_data *pdata = keypad->pdata; |
1814db69 | 347 | struct input_dev *input_dev = keypad->input_dev; |
bd96f378 | 348 | unsigned short keycode; |
1814db69 | 349 | int i; |
0a085a94 | 350 | int error; |
1814db69 | 351 | |
2b2f5147 | 352 | error = matrix_keypad_build_keymap(pdata->matrix_keymap_data, NULL, |
0a085a94 CX |
353 | pdata->matrix_key_rows, |
354 | pdata->matrix_key_cols, | |
355 | keypad->keycodes, input_dev); | |
356 | if (error) | |
357 | return error; | |
1814db69 | 358 | |
0a085a94 CX |
359 | /* |
360 | * The keycodes may not only include matrix keys but also the direct | |
361 | * or rotary keys. | |
362 | */ | |
363 | input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes); | |
471637a5 | 364 | |
0a085a94 | 365 | /* For direct keys. */ |
bd96f378 DT |
366 | for (i = 0; i < pdata->direct_key_num; i++) { |
367 | keycode = pdata->direct_key_map[i]; | |
368 | keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = keycode; | |
369 | __set_bit(keycode, input_dev->keybit); | |
370 | } | |
62059d9e | 371 | |
471637a5 AO |
372 | if (pdata->enable_rotary0) { |
373 | if (pdata->rotary0_up_key && pdata->rotary0_down_key) { | |
bd96f378 DT |
374 | keycode = pdata->rotary0_up_key; |
375 | keypad->keycodes[MAX_MATRIX_KEY_NUM + 0] = keycode; | |
376 | __set_bit(keycode, input_dev->keybit); | |
377 | ||
378 | keycode = pdata->rotary0_down_key; | |
379 | keypad->keycodes[MAX_MATRIX_KEY_NUM + 1] = keycode; | |
380 | __set_bit(keycode, input_dev->keybit); | |
381 | ||
382 | keypad->rotary_rel_code[0] = -1; | |
383 | } else { | |
384 | keypad->rotary_rel_code[0] = pdata->rotary0_rel_code; | |
52ec7752 | 385 | __set_bit(pdata->rotary0_rel_code, input_dev->relbit); |
bd96f378 | 386 | } |
471637a5 AO |
387 | } |
388 | ||
389 | if (pdata->enable_rotary1) { | |
390 | if (pdata->rotary1_up_key && pdata->rotary1_down_key) { | |
bd96f378 DT |
391 | keycode = pdata->rotary1_up_key; |
392 | keypad->keycodes[MAX_MATRIX_KEY_NUM + 2] = keycode; | |
393 | __set_bit(keycode, input_dev->keybit); | |
394 | ||
395 | keycode = pdata->rotary1_down_key; | |
396 | keypad->keycodes[MAX_MATRIX_KEY_NUM + 3] = keycode; | |
397 | __set_bit(keycode, input_dev->keybit); | |
398 | ||
399 | keypad->rotary_rel_code[1] = -1; | |
400 | } else { | |
401 | keypad->rotary_rel_code[1] = pdata->rotary1_rel_code; | |
52ec7752 | 402 | __set_bit(pdata->rotary1_rel_code, input_dev->relbit); |
bd96f378 | 403 | } |
471637a5 | 404 | } |
1814db69 | 405 | |
bd96f378 | 406 | __clear_bit(KEY_RESERVED, input_dev->keybit); |
0a085a94 CX |
407 | |
408 | return 0; | |
1814db69 EM |
409 | } |
410 | ||
411 | static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad) | |
412 | { | |
9eb52139 | 413 | const struct pxa27x_keypad_platform_data *pdata = keypad->pdata; |
bd96f378 | 414 | struct input_dev *input_dev = keypad->input_dev; |
1814db69 EM |
415 | int row, col, num_keys_pressed = 0; |
416 | uint32_t new_state[MAX_MATRIX_KEY_COLS]; | |
9c60debd | 417 | uint32_t kpas = keypad_readl(KPAS); |
1814db69 EM |
418 | |
419 | num_keys_pressed = KPAS_MUKP(kpas); | |
420 | ||
421 | memset(new_state, 0, sizeof(new_state)); | |
422 | ||
423 | if (num_keys_pressed == 0) | |
424 | goto scan; | |
425 | ||
426 | if (num_keys_pressed == 1) { | |
427 | col = KPAS_CP(kpas); | |
428 | row = KPAS_RP(kpas); | |
429 | ||
430 | /* if invalid row/col, treat as no key pressed */ | |
431 | if (col >= pdata->matrix_key_cols || | |
432 | row >= pdata->matrix_key_rows) | |
433 | goto scan; | |
434 | ||
435 | new_state[col] = (1 << row); | |
436 | goto scan; | |
437 | } | |
438 | ||
439 | if (num_keys_pressed > 1) { | |
9c60debd EM |
440 | uint32_t kpasmkp0 = keypad_readl(KPASMKP0); |
441 | uint32_t kpasmkp1 = keypad_readl(KPASMKP1); | |
442 | uint32_t kpasmkp2 = keypad_readl(KPASMKP2); | |
443 | uint32_t kpasmkp3 = keypad_readl(KPASMKP3); | |
1814db69 EM |
444 | |
445 | new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK; | |
446 | new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK; | |
447 | new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK; | |
448 | new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK; | |
449 | new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK; | |
450 | new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK; | |
451 | new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK; | |
452 | new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK; | |
453 | } | |
454 | scan: | |
455 | for (col = 0; col < pdata->matrix_key_cols; col++) { | |
456 | uint32_t bits_changed; | |
bd96f378 | 457 | int code; |
1814db69 EM |
458 | |
459 | bits_changed = keypad->matrix_key_state[col] ^ new_state[col]; | |
460 | if (bits_changed == 0) | |
461 | continue; | |
462 | ||
463 | for (row = 0; row < pdata->matrix_key_rows; row++) { | |
464 | if ((bits_changed & (1 << row)) == 0) | |
465 | continue; | |
466 | ||
c5ec1948 CX |
467 | code = MATRIX_SCAN_CODE(row, col, keypad->row_shift); |
468 | ||
bd96f378 DT |
469 | input_event(input_dev, EV_MSC, MSC_SCAN, code); |
470 | input_report_key(input_dev, keypad->keycodes[code], | |
471 | new_state[col] & (1 << row)); | |
1814db69 EM |
472 | } |
473 | } | |
bd96f378 | 474 | input_sync(input_dev); |
1814db69 EM |
475 | memcpy(keypad->matrix_key_state, new_state, sizeof(new_state)); |
476 | } | |
22d8a73a | 477 | |
d7416f9e EM |
478 | #define DEFAULT_KPREC (0x007f007f) |
479 | ||
62059d9e EM |
480 | static inline int rotary_delta(uint32_t kprec) |
481 | { | |
482 | if (kprec & KPREC_OF0) | |
483 | return (kprec & 0xff) + 0x7f; | |
484 | else if (kprec & KPREC_UF0) | |
485 | return (kprec & 0xff) - 0x7f - 0xff; | |
486 | else | |
487 | return (kprec & 0xff) - 0x7f; | |
488 | } | |
489 | ||
490 | static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta) | |
491 | { | |
492 | struct input_dev *dev = keypad->input_dev; | |
493 | ||
494 | if (delta == 0) | |
495 | return; | |
496 | ||
bd96f378 DT |
497 | if (keypad->rotary_rel_code[r] == -1) { |
498 | int code = MAX_MATRIX_KEY_NUM + 2 * r + (delta > 0 ? 0 : 1); | |
499 | unsigned char keycode = keypad->keycodes[code]; | |
62059d9e EM |
500 | |
501 | /* simulate a press-n-release */ | |
bd96f378 | 502 | input_event(dev, EV_MSC, MSC_SCAN, code); |
62059d9e EM |
503 | input_report_key(dev, keycode, 1); |
504 | input_sync(dev); | |
bd96f378 | 505 | input_event(dev, EV_MSC, MSC_SCAN, code); |
62059d9e EM |
506 | input_report_key(dev, keycode, 0); |
507 | input_sync(dev); | |
508 | } else { | |
509 | input_report_rel(dev, keypad->rotary_rel_code[r], delta); | |
510 | input_sync(dev); | |
511 | } | |
512 | } | |
513 | ||
514 | static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad) | |
515 | { | |
9eb52139 | 516 | const struct pxa27x_keypad_platform_data *pdata = keypad->pdata; |
62059d9e EM |
517 | uint32_t kprec; |
518 | ||
519 | /* read and reset to default count value */ | |
9c60debd EM |
520 | kprec = keypad_readl(KPREC); |
521 | keypad_writel(KPREC, DEFAULT_KPREC); | |
62059d9e EM |
522 | |
523 | if (pdata->enable_rotary0) | |
524 | report_rotary_event(keypad, 0, rotary_delta(kprec)); | |
525 | ||
526 | if (pdata->enable_rotary1) | |
527 | report_rotary_event(keypad, 1, rotary_delta(kprec >> 16)); | |
528 | } | |
529 | ||
530 | static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad) | |
531 | { | |
9eb52139 | 532 | const struct pxa27x_keypad_platform_data *pdata = keypad->pdata; |
bd96f378 | 533 | struct input_dev *input_dev = keypad->input_dev; |
62059d9e EM |
534 | unsigned int new_state; |
535 | uint32_t kpdk, bits_changed; | |
536 | int i; | |
537 | ||
9c60debd | 538 | kpdk = keypad_readl(KPDK); |
62059d9e EM |
539 | |
540 | if (pdata->enable_rotary0 || pdata->enable_rotary1) | |
541 | pxa27x_keypad_scan_rotary(keypad); | |
542 | ||
ee1d8040 CX |
543 | /* |
544 | * The KPDR_DK only output the key pin level, so it relates to board, | |
545 | * and low level may be active. | |
546 | */ | |
547 | if (pdata->direct_key_low_active) | |
548 | new_state = ~KPDK_DK(kpdk) & keypad->direct_key_mask; | |
549 | else | |
550 | new_state = KPDK_DK(kpdk) & keypad->direct_key_mask; | |
551 | ||
62059d9e EM |
552 | bits_changed = keypad->direct_key_state ^ new_state; |
553 | ||
554 | if (bits_changed == 0) | |
555 | return; | |
556 | ||
557 | for (i = 0; i < pdata->direct_key_num; i++) { | |
bd96f378 DT |
558 | if (bits_changed & (1 << i)) { |
559 | int code = MAX_MATRIX_KEY_NUM + i; | |
560 | ||
561 | input_event(input_dev, EV_MSC, MSC_SCAN, code); | |
562 | input_report_key(input_dev, keypad->keycodes[code], | |
563 | new_state & (1 << i)); | |
564 | } | |
62059d9e | 565 | } |
bd96f378 | 566 | input_sync(input_dev); |
62059d9e EM |
567 | keypad->direct_key_state = new_state; |
568 | } | |
569 | ||
3587c258 MB |
570 | static void clear_wakeup_event(struct pxa27x_keypad *keypad) |
571 | { | |
9eb52139 | 572 | const struct pxa27x_keypad_platform_data *pdata = keypad->pdata; |
3587c258 MB |
573 | |
574 | if (pdata->clear_wakeup_event) | |
575 | (pdata->clear_wakeup_event)(); | |
576 | } | |
577 | ||
0e5f11aa | 578 | static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id) |
5a90e5bc | 579 | { |
1814db69 | 580 | struct pxa27x_keypad *keypad = dev_id; |
9c60debd | 581 | unsigned long kpc = keypad_readl(KPC); |
62059d9e | 582 | |
3587c258 MB |
583 | clear_wakeup_event(keypad); |
584 | ||
62059d9e EM |
585 | if (kpc & KPC_DI) |
586 | pxa27x_keypad_scan_direct(keypad); | |
5a90e5bc | 587 | |
1814db69 EM |
588 | if (kpc & KPC_MI) |
589 | pxa27x_keypad_scan_matrix(keypad); | |
5a90e5bc RG |
590 | |
591 | return IRQ_HANDLED; | |
592 | } | |
593 | ||
d7416f9e | 594 | static void pxa27x_keypad_config(struct pxa27x_keypad *keypad) |
5a90e5bc | 595 | { |
9eb52139 | 596 | const struct pxa27x_keypad_platform_data *pdata = keypad->pdata; |
62059d9e | 597 | unsigned int mask = 0, direct_key_num = 0; |
d7416f9e | 598 | unsigned long kpc = 0; |
1814db69 | 599 | |
904adede VK |
600 | /* clear pending interrupt bit */ |
601 | keypad_readl(KPC); | |
602 | ||
d7416f9e EM |
603 | /* enable matrix keys with automatic scan */ |
604 | if (pdata->matrix_key_rows && pdata->matrix_key_cols) { | |
605 | kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL; | |
606 | kpc |= KPC_MKRN(pdata->matrix_key_rows) | | |
607 | KPC_MKCN(pdata->matrix_key_cols); | |
608 | } | |
5a90e5bc | 609 | |
62059d9e EM |
610 | /* enable rotary key, debounce interval same as direct keys */ |
611 | if (pdata->enable_rotary0) { | |
612 | mask |= 0x03; | |
613 | direct_key_num = 2; | |
614 | kpc |= KPC_REE0; | |
615 | } | |
616 | ||
617 | if (pdata->enable_rotary1) { | |
618 | mask |= 0x0c; | |
619 | direct_key_num = 4; | |
620 | kpc |= KPC_REE1; | |
621 | } | |
622 | ||
623 | if (pdata->direct_key_num > direct_key_num) | |
624 | direct_key_num = pdata->direct_key_num; | |
625 | ||
fb054bf2 CX |
626 | /* |
627 | * Direct keys usage may not start from KP_DKIN0, check the platfrom | |
628 | * mask data to config the specific. | |
629 | */ | |
630 | if (pdata->direct_key_mask) | |
631 | keypad->direct_key_mask = pdata->direct_key_mask; | |
632 | else | |
633 | keypad->direct_key_mask = ((1 << direct_key_num) - 1) & ~mask; | |
62059d9e EM |
634 | |
635 | /* enable direct key */ | |
636 | if (direct_key_num) | |
637 | kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num); | |
5a90e5bc | 638 | |
9c60debd EM |
639 | keypad_writel(KPC, kpc | KPC_RE_ZERO_DEB); |
640 | keypad_writel(KPREC, DEFAULT_KPREC); | |
76cb44e1 | 641 | keypad_writel(KPKDI, pdata->debounce_interval); |
d7416f9e EM |
642 | } |
643 | ||
644 | static int pxa27x_keypad_open(struct input_dev *dev) | |
645 | { | |
646 | struct pxa27x_keypad *keypad = input_get_drvdata(dev); | |
5a90e5bc RG |
647 | |
648 | /* Enable unit clock */ | |
6ce34a5f | 649 | clk_prepare_enable(keypad->clk); |
d7416f9e | 650 | pxa27x_keypad_config(keypad); |
5a90e5bc RG |
651 | |
652 | return 0; | |
653 | } | |
654 | ||
0e5f11aa | 655 | static void pxa27x_keypad_close(struct input_dev *dev) |
5a90e5bc | 656 | { |
1814db69 EM |
657 | struct pxa27x_keypad *keypad = input_get_drvdata(dev); |
658 | ||
5a90e5bc | 659 | /* Disable clock unit */ |
6ce34a5f | 660 | clk_disable_unprepare(keypad->clk); |
5a90e5bc RG |
661 | } |
662 | ||
f9f6def8 | 663 | #ifdef CONFIG_PM_SLEEP |
b0010911 | 664 | static int pxa27x_keypad_suspend(struct device *dev) |
5a90e5bc | 665 | { |
b0010911 | 666 | struct platform_device *pdev = to_platform_device(dev); |
1814db69 | 667 | struct pxa27x_keypad *keypad = platform_get_drvdata(pdev); |
5a90e5bc | 668 | |
6ce34a5f CX |
669 | /* |
670 | * If the keypad is used a wake up source, clock can not be disabled. | |
671 | * Or it can not detect the key pressing. | |
672 | */ | |
39ab9dde EM |
673 | if (device_may_wakeup(&pdev->dev)) |
674 | enable_irq_wake(keypad->irq); | |
6ce34a5f CX |
675 | else |
676 | clk_disable_unprepare(keypad->clk); | |
39ab9dde | 677 | |
5a90e5bc RG |
678 | return 0; |
679 | } | |
680 | ||
b0010911 | 681 | static int pxa27x_keypad_resume(struct device *dev) |
5a90e5bc | 682 | { |
b0010911 | 683 | struct platform_device *pdev = to_platform_device(dev); |
1814db69 | 684 | struct pxa27x_keypad *keypad = platform_get_drvdata(pdev); |
1814db69 | 685 | struct input_dev *input_dev = keypad->input_dev; |
5a90e5bc | 686 | |
6ce34a5f CX |
687 | /* |
688 | * If the keypad is used as wake up source, the clock is not turned | |
689 | * off. So do not need configure it again. | |
690 | */ | |
691 | if (device_may_wakeup(&pdev->dev)) { | |
39ab9dde | 692 | disable_irq_wake(keypad->irq); |
6ce34a5f CX |
693 | } else { |
694 | mutex_lock(&input_dev->mutex); | |
39ab9dde | 695 | |
6ce34a5f CX |
696 | if (input_dev->users) { |
697 | /* Enable unit clock */ | |
698 | clk_prepare_enable(keypad->clk); | |
699 | pxa27x_keypad_config(keypad); | |
700 | } | |
5a90e5bc | 701 | |
6ce34a5f | 702 | mutex_unlock(&input_dev->mutex); |
5a90e5bc RG |
703 | } |
704 | ||
5a90e5bc RG |
705 | return 0; |
706 | } | |
5a90e5bc RG |
707 | #endif |
708 | ||
f9f6def8 DT |
709 | static SIMPLE_DEV_PM_OPS(pxa27x_keypad_pm_ops, |
710 | pxa27x_keypad_suspend, pxa27x_keypad_resume); | |
711 | ||
712 | ||
5298cc4c | 713 | static int pxa27x_keypad_probe(struct platform_device *pdev) |
5a90e5bc | 714 | { |
9eb52139 DT |
715 | const struct pxa27x_keypad_platform_data *pdata = |
716 | dev_get_platdata(&pdev->dev); | |
e4156979 | 717 | struct device_node *np = pdev->dev.of_node; |
1814db69 | 718 | struct pxa27x_keypad *keypad; |
5a90e5bc | 719 | struct input_dev *input_dev; |
9c60debd EM |
720 | struct resource *res; |
721 | int irq, error; | |
5a90e5bc | 722 | |
e4156979 CX |
723 | /* Driver need build keycode from device tree or pdata */ |
724 | if (!np && !pdata) | |
bd96f378 | 725 | return -EINVAL; |
1814db69 | 726 | |
9c60debd EM |
727 | irq = platform_get_irq(pdev, 0); |
728 | if (irq < 0) { | |
729 | dev_err(&pdev->dev, "failed to get keypad irq\n"); | |
bd96f378 | 730 | return -ENXIO; |
9c60debd EM |
731 | } |
732 | ||
733 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
734 | if (res == NULL) { | |
735 | dev_err(&pdev->dev, "failed to get I/O memory\n"); | |
bd96f378 DT |
736 | return -ENXIO; |
737 | } | |
738 | ||
38c38072 PG |
739 | keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), |
740 | GFP_KERNEL); | |
741 | if (!keypad) | |
742 | return -ENOMEM; | |
743 | ||
744 | input_dev = devm_input_allocate_device(&pdev->dev); | |
745 | if (!input_dev) | |
746 | return -ENOMEM; | |
9c60debd | 747 | |
bd96f378 DT |
748 | keypad->pdata = pdata; |
749 | keypad->input_dev = input_dev; | |
750 | keypad->irq = irq; | |
751 | ||
38c38072 PG |
752 | keypad->mmio_base = devm_ioremap_resource(&pdev->dev, res); |
753 | if (IS_ERR(keypad->mmio_base)) | |
754 | return PTR_ERR(keypad->mmio_base); | |
9c60debd | 755 | |
38c38072 | 756 | keypad->clk = devm_clk_get(&pdev->dev, NULL); |
1814db69 EM |
757 | if (IS_ERR(keypad->clk)) { |
758 | dev_err(&pdev->dev, "failed to get keypad clock\n"); | |
38c38072 | 759 | return PTR_ERR(keypad->clk); |
22d8a73a RK |
760 | } |
761 | ||
9c60debd | 762 | input_dev->name = pdev->name; |
5a90e5bc | 763 | input_dev->id.bustype = BUS_HOST; |
0e5f11aa EM |
764 | input_dev->open = pxa27x_keypad_open; |
765 | input_dev->close = pxa27x_keypad_close; | |
469ba4df | 766 | input_dev->dev.parent = &pdev->dev; |
5a90e5bc | 767 | |
bd96f378 DT |
768 | input_dev->keycode = keypad->keycodes; |
769 | input_dev->keycodesize = sizeof(keypad->keycodes[0]); | |
770 | input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes); | |
771 | ||
1814db69 EM |
772 | input_set_drvdata(input_dev, keypad); |
773 | ||
471637a5 | 774 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); |
bd96f378 | 775 | input_set_capability(input_dev, EV_MSC, MSC_SCAN); |
1814db69 | 776 | |
049d75f7 | 777 | if (pdata) { |
e4156979 | 778 | error = pxa27x_keypad_build_keycode(keypad); |
049d75f7 | 779 | } else { |
e4156979 | 780 | error = pxa27x_keypad_build_keycode_from_dt(keypad); |
049d75f7 MD |
781 | /* |
782 | * Data that we get from DT resides in dynamically | |
783 | * allocated memory so we need to update our pdata | |
784 | * pointer. | |
785 | */ | |
786 | pdata = keypad->pdata; | |
787 | } | |
0a085a94 CX |
788 | if (error) { |
789 | dev_err(&pdev->dev, "failed to build keycode\n"); | |
38c38072 | 790 | return error; |
0a085a94 | 791 | } |
bd96f378 | 792 | |
c5ec1948 CX |
793 | keypad->row_shift = get_count_order(pdata->matrix_key_cols); |
794 | ||
bd96f378 DT |
795 | if ((pdata->enable_rotary0 && keypad->rotary_rel_code[0] != -1) || |
796 | (pdata->enable_rotary1 && keypad->rotary_rel_code[1] != -1)) { | |
797 | input_dev->evbit[0] |= BIT_MASK(EV_REL); | |
798 | } | |
5a90e5bc | 799 | |
38c38072 PG |
800 | error = devm_request_irq(&pdev->dev, irq, pxa27x_keypad_irq_handler, |
801 | 0, pdev->name, keypad); | |
5a90e5bc | 802 | if (error) { |
9c60debd | 803 | dev_err(&pdev->dev, "failed to request IRQ\n"); |
38c38072 | 804 | return error; |
5a90e5bc RG |
805 | } |
806 | ||
5a90e5bc RG |
807 | /* Register the input device */ |
808 | error = input_register_device(input_dev); | |
9c60debd EM |
809 | if (error) { |
810 | dev_err(&pdev->dev, "failed to register input device\n"); | |
38c38072 | 811 | return error; |
9c60debd | 812 | } |
5a90e5bc | 813 | |
bd96f378 | 814 | platform_set_drvdata(pdev, keypad); |
39ab9dde EM |
815 | device_init_wakeup(&pdev->dev, 1); |
816 | ||
5a90e5bc | 817 | return 0; |
5a90e5bc RG |
818 | } |
819 | ||
e4156979 CX |
820 | #ifdef CONFIG_OF |
821 | static const struct of_device_id pxa27x_keypad_dt_match[] = { | |
822 | { .compatible = "marvell,pxa27x-keypad" }, | |
823 | {}, | |
824 | }; | |
825 | MODULE_DEVICE_TABLE(of, pxa27x_keypad_dt_match); | |
826 | #endif | |
827 | ||
0e5f11aa EM |
828 | static struct platform_driver pxa27x_keypad_driver = { |
829 | .probe = pxa27x_keypad_probe, | |
5a90e5bc | 830 | .driver = { |
9c60debd | 831 | .name = "pxa27x-keypad", |
e4156979 | 832 | .of_match_table = of_match_ptr(pxa27x_keypad_dt_match), |
b0010911 | 833 | .pm = &pxa27x_keypad_pm_ops, |
5a90e5bc RG |
834 | }, |
835 | }; | |
5146c84f | 836 | module_platform_driver(pxa27x_keypad_driver); |
5a90e5bc | 837 | |
0e5f11aa | 838 | MODULE_DESCRIPTION("PXA27x Keypad Controller Driver"); |
5a90e5bc | 839 | MODULE_LICENSE("GPL"); |
38c38072 PG |
840 | /* work with hotplug and coldplug */ |
841 | MODULE_ALIAS("platform:pxa27x-keypad"); |