Commit | Line | Data |
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27e34995 | 1 | /* |
1a6e4b74 VK |
2 | * ST Microelectronics MFD: stmpe's driver |
3 | * | |
27e34995 RV |
4 | * Copyright (C) ST-Ericsson SA 2010 |
5 | * | |
6 | * License Terms: GNU General Public License, version 2 | |
7 | * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson | |
8 | */ | |
9 | ||
73de16db | 10 | #include <linux/gpio.h> |
27e34995 | 11 | #include <linux/kernel.h> |
27e34995 RV |
12 | #include <linux/interrupt.h> |
13 | #include <linux/irq.h> | |
1a6e4b74 | 14 | #include <linux/pm.h> |
27e34995 | 15 | #include <linux/slab.h> |
27e34995 | 16 | #include <linux/mfd/core.h> |
27e34995 RV |
17 | #include "stmpe.h" |
18 | ||
19 | static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks) | |
20 | { | |
21 | return stmpe->variant->enable(stmpe, blocks, true); | |
22 | } | |
23 | ||
24 | static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks) | |
25 | { | |
26 | return stmpe->variant->enable(stmpe, blocks, false); | |
27 | } | |
28 | ||
29 | static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg) | |
30 | { | |
31 | int ret; | |
32 | ||
1a6e4b74 | 33 | ret = stmpe->ci->read_byte(stmpe, reg); |
27e34995 | 34 | if (ret < 0) |
1a6e4b74 | 35 | dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret); |
27e34995 RV |
36 | |
37 | dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret); | |
38 | ||
39 | return ret; | |
40 | } | |
41 | ||
42 | static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) | |
43 | { | |
44 | int ret; | |
45 | ||
46 | dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val); | |
47 | ||
1a6e4b74 | 48 | ret = stmpe->ci->write_byte(stmpe, reg, val); |
27e34995 | 49 | if (ret < 0) |
1a6e4b74 | 50 | dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret); |
27e34995 RV |
51 | |
52 | return ret; | |
53 | } | |
54 | ||
55 | static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) | |
56 | { | |
57 | int ret; | |
58 | ||
59 | ret = __stmpe_reg_read(stmpe, reg); | |
60 | if (ret < 0) | |
61 | return ret; | |
62 | ||
63 | ret &= ~mask; | |
64 | ret |= val; | |
65 | ||
66 | return __stmpe_reg_write(stmpe, reg, ret); | |
67 | } | |
68 | ||
69 | static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, | |
70 | u8 *values) | |
71 | { | |
72 | int ret; | |
73 | ||
1a6e4b74 | 74 | ret = stmpe->ci->read_block(stmpe, reg, length, values); |
27e34995 | 75 | if (ret < 0) |
1a6e4b74 | 76 | dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret); |
27e34995 RV |
77 | |
78 | dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret); | |
79 | stmpe_dump_bytes("stmpe rd: ", values, length); | |
80 | ||
81 | return ret; | |
82 | } | |
83 | ||
84 | static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, | |
85 | const u8 *values) | |
86 | { | |
87 | int ret; | |
88 | ||
89 | dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length); | |
90 | stmpe_dump_bytes("stmpe wr: ", values, length); | |
91 | ||
1a6e4b74 | 92 | ret = stmpe->ci->write_block(stmpe, reg, length, values); |
27e34995 | 93 | if (ret < 0) |
1a6e4b74 | 94 | dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret); |
27e34995 RV |
95 | |
96 | return ret; | |
97 | } | |
98 | ||
99 | /** | |
100 | * stmpe_enable - enable blocks on an STMPE device | |
101 | * @stmpe: Device to work on | |
102 | * @blocks: Mask of blocks (enum stmpe_block values) to enable | |
103 | */ | |
104 | int stmpe_enable(struct stmpe *stmpe, unsigned int blocks) | |
105 | { | |
106 | int ret; | |
107 | ||
108 | mutex_lock(&stmpe->lock); | |
109 | ret = __stmpe_enable(stmpe, blocks); | |
110 | mutex_unlock(&stmpe->lock); | |
111 | ||
112 | return ret; | |
113 | } | |
114 | EXPORT_SYMBOL_GPL(stmpe_enable); | |
115 | ||
116 | /** | |
117 | * stmpe_disable - disable blocks on an STMPE device | |
118 | * @stmpe: Device to work on | |
119 | * @blocks: Mask of blocks (enum stmpe_block values) to enable | |
120 | */ | |
121 | int stmpe_disable(struct stmpe *stmpe, unsigned int blocks) | |
122 | { | |
123 | int ret; | |
124 | ||
125 | mutex_lock(&stmpe->lock); | |
126 | ret = __stmpe_disable(stmpe, blocks); | |
127 | mutex_unlock(&stmpe->lock); | |
128 | ||
129 | return ret; | |
130 | } | |
131 | EXPORT_SYMBOL_GPL(stmpe_disable); | |
132 | ||
133 | /** | |
134 | * stmpe_reg_read() - read a single STMPE register | |
135 | * @stmpe: Device to read from | |
136 | * @reg: Register to read | |
137 | */ | |
138 | int stmpe_reg_read(struct stmpe *stmpe, u8 reg) | |
139 | { | |
140 | int ret; | |
141 | ||
142 | mutex_lock(&stmpe->lock); | |
143 | ret = __stmpe_reg_read(stmpe, reg); | |
144 | mutex_unlock(&stmpe->lock); | |
145 | ||
146 | return ret; | |
147 | } | |
148 | EXPORT_SYMBOL_GPL(stmpe_reg_read); | |
149 | ||
150 | /** | |
151 | * stmpe_reg_write() - write a single STMPE register | |
152 | * @stmpe: Device to write to | |
153 | * @reg: Register to write | |
154 | * @val: Value to write | |
155 | */ | |
156 | int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) | |
157 | { | |
158 | int ret; | |
159 | ||
160 | mutex_lock(&stmpe->lock); | |
161 | ret = __stmpe_reg_write(stmpe, reg, val); | |
162 | mutex_unlock(&stmpe->lock); | |
163 | ||
164 | return ret; | |
165 | } | |
166 | EXPORT_SYMBOL_GPL(stmpe_reg_write); | |
167 | ||
168 | /** | |
169 | * stmpe_set_bits() - set the value of a bitfield in a STMPE register | |
170 | * @stmpe: Device to write to | |
171 | * @reg: Register to write | |
172 | * @mask: Mask of bits to set | |
173 | * @val: Value to set | |
174 | */ | |
175 | int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) | |
176 | { | |
177 | int ret; | |
178 | ||
179 | mutex_lock(&stmpe->lock); | |
180 | ret = __stmpe_set_bits(stmpe, reg, mask, val); | |
181 | mutex_unlock(&stmpe->lock); | |
182 | ||
183 | return ret; | |
184 | } | |
185 | EXPORT_SYMBOL_GPL(stmpe_set_bits); | |
186 | ||
187 | /** | |
188 | * stmpe_block_read() - read multiple STMPE registers | |
189 | * @stmpe: Device to read from | |
190 | * @reg: First register | |
191 | * @length: Number of registers | |
192 | * @values: Buffer to write to | |
193 | */ | |
194 | int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values) | |
195 | { | |
196 | int ret; | |
197 | ||
198 | mutex_lock(&stmpe->lock); | |
199 | ret = __stmpe_block_read(stmpe, reg, length, values); | |
200 | mutex_unlock(&stmpe->lock); | |
201 | ||
202 | return ret; | |
203 | } | |
204 | EXPORT_SYMBOL_GPL(stmpe_block_read); | |
205 | ||
206 | /** | |
207 | * stmpe_block_write() - write multiple STMPE registers | |
208 | * @stmpe: Device to write to | |
209 | * @reg: First register | |
210 | * @length: Number of registers | |
211 | * @values: Values to write | |
212 | */ | |
213 | int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, | |
214 | const u8 *values) | |
215 | { | |
216 | int ret; | |
217 | ||
218 | mutex_lock(&stmpe->lock); | |
219 | ret = __stmpe_block_write(stmpe, reg, length, values); | |
220 | mutex_unlock(&stmpe->lock); | |
221 | ||
222 | return ret; | |
223 | } | |
224 | EXPORT_SYMBOL_GPL(stmpe_block_write); | |
225 | ||
226 | /** | |
4dcaa6b6 | 227 | * stmpe_set_altfunc()- set the alternate function for STMPE pins |
27e34995 RV |
228 | * @stmpe: Device to configure |
229 | * @pins: Bitmask of pins to affect | |
230 | * @block: block to enable alternate functions for | |
231 | * | |
232 | * @pins is assumed to have a bit set for each of the bits whose alternate | |
233 | * function is to be changed, numbered according to the GPIOXY numbers. | |
234 | * | |
235 | * If the GPIO module is not enabled, this function automatically enables it in | |
236 | * order to perform the change. | |
237 | */ | |
238 | int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block) | |
239 | { | |
240 | struct stmpe_variant_info *variant = stmpe->variant; | |
241 | u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB]; | |
242 | int af_bits = variant->af_bits; | |
243 | int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8); | |
244 | int afperreg = 8 / af_bits; | |
245 | int mask = (1 << af_bits) - 1; | |
246 | u8 regs[numregs]; | |
247 | int af; | |
248 | int ret; | |
249 | ||
250 | mutex_lock(&stmpe->lock); | |
251 | ||
252 | ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO); | |
253 | if (ret < 0) | |
254 | goto out; | |
255 | ||
256 | ret = __stmpe_block_read(stmpe, regaddr, numregs, regs); | |
257 | if (ret < 0) | |
258 | goto out; | |
259 | ||
260 | af = variant->get_altfunc(stmpe, block); | |
261 | ||
262 | while (pins) { | |
263 | int pin = __ffs(pins); | |
264 | int regoffset = numregs - (pin / afperreg) - 1; | |
265 | int pos = (pin % afperreg) * (8 / afperreg); | |
266 | ||
267 | regs[regoffset] &= ~(mask << pos); | |
268 | regs[regoffset] |= af << pos; | |
269 | ||
270 | pins &= ~(1 << pin); | |
271 | } | |
272 | ||
273 | ret = __stmpe_block_write(stmpe, regaddr, numregs, regs); | |
274 | ||
275 | out: | |
276 | mutex_unlock(&stmpe->lock); | |
277 | return ret; | |
278 | } | |
279 | EXPORT_SYMBOL_GPL(stmpe_set_altfunc); | |
280 | ||
281 | /* | |
282 | * GPIO (all variants) | |
283 | */ | |
284 | ||
285 | static struct resource stmpe_gpio_resources[] = { | |
286 | /* Start and end filled dynamically */ | |
287 | { | |
288 | .flags = IORESOURCE_IRQ, | |
289 | }, | |
290 | }; | |
291 | ||
292 | static struct mfd_cell stmpe_gpio_cell = { | |
293 | .name = "stmpe-gpio", | |
294 | .resources = stmpe_gpio_resources, | |
295 | .num_resources = ARRAY_SIZE(stmpe_gpio_resources), | |
296 | }; | |
297 | ||
298 | /* | |
299 | * Keypad (1601, 2401, 2403) | |
300 | */ | |
301 | ||
302 | static struct resource stmpe_keypad_resources[] = { | |
303 | { | |
304 | .name = "KEYPAD", | |
305 | .start = 0, | |
306 | .end = 0, | |
307 | .flags = IORESOURCE_IRQ, | |
308 | }, | |
309 | { | |
310 | .name = "KEYPAD_OVER", | |
311 | .start = 1, | |
312 | .end = 1, | |
313 | .flags = IORESOURCE_IRQ, | |
314 | }, | |
315 | }; | |
316 | ||
317 | static struct mfd_cell stmpe_keypad_cell = { | |
318 | .name = "stmpe-keypad", | |
319 | .resources = stmpe_keypad_resources, | |
320 | .num_resources = ARRAY_SIZE(stmpe_keypad_resources), | |
321 | }; | |
322 | ||
323 | /* | |
324 | * Touchscreen (STMPE811) | |
325 | */ | |
326 | ||
327 | static struct resource stmpe_ts_resources[] = { | |
328 | { | |
329 | .name = "TOUCH_DET", | |
330 | .start = 0, | |
331 | .end = 0, | |
332 | .flags = IORESOURCE_IRQ, | |
333 | }, | |
334 | { | |
335 | .name = "FIFO_TH", | |
336 | .start = 1, | |
337 | .end = 1, | |
338 | .flags = IORESOURCE_IRQ, | |
339 | }, | |
340 | }; | |
341 | ||
342 | static struct mfd_cell stmpe_ts_cell = { | |
343 | .name = "stmpe-ts", | |
344 | .resources = stmpe_ts_resources, | |
345 | .num_resources = ARRAY_SIZE(stmpe_ts_resources), | |
346 | }; | |
347 | ||
348 | /* | |
349 | * STMPE811 | |
350 | */ | |
351 | ||
352 | static const u8 stmpe811_regs[] = { | |
353 | [STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID, | |
354 | [STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL, | |
355 | [STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN, | |
356 | [STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA, | |
357 | [STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA, | |
358 | [STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN, | |
359 | [STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN, | |
360 | [STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR, | |
361 | [STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE, | |
362 | [STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE, | |
363 | [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF, | |
364 | [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN, | |
365 | [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA, | |
366 | [STMPE_IDX_GPEDR_MSB] = STMPE811_REG_GPIO_ED, | |
367 | }; | |
368 | ||
369 | static struct stmpe_variant_block stmpe811_blocks[] = { | |
370 | { | |
371 | .cell = &stmpe_gpio_cell, | |
372 | .irq = STMPE811_IRQ_GPIOC, | |
373 | .block = STMPE_BLOCK_GPIO, | |
374 | }, | |
375 | { | |
376 | .cell = &stmpe_ts_cell, | |
377 | .irq = STMPE811_IRQ_TOUCH_DET, | |
378 | .block = STMPE_BLOCK_TOUCHSCREEN, | |
379 | }, | |
380 | }; | |
381 | ||
382 | static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks, | |
383 | bool enable) | |
384 | { | |
385 | unsigned int mask = 0; | |
386 | ||
387 | if (blocks & STMPE_BLOCK_GPIO) | |
388 | mask |= STMPE811_SYS_CTRL2_GPIO_OFF; | |
389 | ||
390 | if (blocks & STMPE_BLOCK_ADC) | |
391 | mask |= STMPE811_SYS_CTRL2_ADC_OFF; | |
392 | ||
393 | if (blocks & STMPE_BLOCK_TOUCHSCREEN) | |
394 | mask |= STMPE811_SYS_CTRL2_TSC_OFF; | |
395 | ||
396 | return __stmpe_set_bits(stmpe, STMPE811_REG_SYS_CTRL2, mask, | |
397 | enable ? 0 : mask); | |
398 | } | |
399 | ||
400 | static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) | |
401 | { | |
402 | /* 0 for touchscreen, 1 for GPIO */ | |
403 | return block != STMPE_BLOCK_TOUCHSCREEN; | |
404 | } | |
405 | ||
406 | static struct stmpe_variant_info stmpe811 = { | |
407 | .name = "stmpe811", | |
408 | .id_val = 0x0811, | |
409 | .id_mask = 0xffff, | |
410 | .num_gpios = 8, | |
411 | .af_bits = 1, | |
412 | .regs = stmpe811_regs, | |
413 | .blocks = stmpe811_blocks, | |
414 | .num_blocks = ARRAY_SIZE(stmpe811_blocks), | |
415 | .num_irqs = STMPE811_NR_INTERNAL_IRQS, | |
416 | .enable = stmpe811_enable, | |
417 | .get_altfunc = stmpe811_get_altfunc, | |
418 | }; | |
419 | ||
420 | /* | |
421 | * STMPE1601 | |
422 | */ | |
423 | ||
424 | static const u8 stmpe1601_regs[] = { | |
425 | [STMPE_IDX_CHIP_ID] = STMPE1601_REG_CHIP_ID, | |
426 | [STMPE_IDX_ICR_LSB] = STMPE1601_REG_ICR_LSB, | |
427 | [STMPE_IDX_IER_LSB] = STMPE1601_REG_IER_LSB, | |
428 | [STMPE_IDX_ISR_MSB] = STMPE1601_REG_ISR_MSB, | |
429 | [STMPE_IDX_GPMR_LSB] = STMPE1601_REG_GPIO_MP_LSB, | |
430 | [STMPE_IDX_GPSR_LSB] = STMPE1601_REG_GPIO_SET_LSB, | |
431 | [STMPE_IDX_GPCR_LSB] = STMPE1601_REG_GPIO_CLR_LSB, | |
432 | [STMPE_IDX_GPDR_LSB] = STMPE1601_REG_GPIO_SET_DIR_LSB, | |
433 | [STMPE_IDX_GPRER_LSB] = STMPE1601_REG_GPIO_RE_LSB, | |
434 | [STMPE_IDX_GPFER_LSB] = STMPE1601_REG_GPIO_FE_LSB, | |
435 | [STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB, | |
436 | [STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB, | |
437 | [STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB, | |
438 | [STMPE_IDX_GPEDR_MSB] = STMPE1601_REG_GPIO_ED_MSB, | |
439 | }; | |
440 | ||
441 | static struct stmpe_variant_block stmpe1601_blocks[] = { | |
442 | { | |
443 | .cell = &stmpe_gpio_cell, | |
444 | .irq = STMPE24XX_IRQ_GPIOC, | |
445 | .block = STMPE_BLOCK_GPIO, | |
446 | }, | |
447 | { | |
448 | .cell = &stmpe_keypad_cell, | |
449 | .irq = STMPE24XX_IRQ_KEYPAD, | |
450 | .block = STMPE_BLOCK_KEYPAD, | |
451 | }, | |
452 | }; | |
453 | ||
5981f4e6 SI |
454 | /* supported autosleep timeout delay (in msecs) */ |
455 | static const int stmpe_autosleep_delay[] = { | |
456 | 4, 16, 32, 64, 128, 256, 512, 1024, | |
457 | }; | |
458 | ||
459 | static int stmpe_round_timeout(int timeout) | |
460 | { | |
461 | int i; | |
462 | ||
463 | for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) { | |
464 | if (stmpe_autosleep_delay[i] >= timeout) | |
465 | return i; | |
466 | } | |
467 | ||
468 | /* | |
469 | * requests for delays longer than supported should not return the | |
470 | * longest supported delay | |
471 | */ | |
472 | return -EINVAL; | |
473 | } | |
474 | ||
475 | static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout) | |
476 | { | |
477 | int ret; | |
478 | ||
479 | if (!stmpe->variant->enable_autosleep) | |
480 | return -ENOSYS; | |
481 | ||
482 | mutex_lock(&stmpe->lock); | |
483 | ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout); | |
484 | mutex_unlock(&stmpe->lock); | |
485 | ||
486 | return ret; | |
487 | } | |
488 | ||
489 | /* | |
490 | * Both stmpe 1601/2403 support same layout for autosleep | |
491 | */ | |
492 | static int stmpe1601_autosleep(struct stmpe *stmpe, | |
493 | int autosleep_timeout) | |
494 | { | |
495 | int ret, timeout; | |
496 | ||
497 | /* choose the best available timeout */ | |
498 | timeout = stmpe_round_timeout(autosleep_timeout); | |
499 | if (timeout < 0) { | |
500 | dev_err(stmpe->dev, "invalid timeout\n"); | |
501 | return timeout; | |
502 | } | |
503 | ||
504 | ret = __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2, | |
505 | STMPE1601_AUTOSLEEP_TIMEOUT_MASK, | |
506 | timeout); | |
507 | if (ret < 0) | |
508 | return ret; | |
509 | ||
510 | return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2, | |
511 | STPME1601_AUTOSLEEP_ENABLE, | |
512 | STPME1601_AUTOSLEEP_ENABLE); | |
513 | } | |
514 | ||
27e34995 RV |
515 | static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks, |
516 | bool enable) | |
517 | { | |
518 | unsigned int mask = 0; | |
519 | ||
520 | if (blocks & STMPE_BLOCK_GPIO) | |
521 | mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO; | |
522 | ||
523 | if (blocks & STMPE_BLOCK_KEYPAD) | |
524 | mask |= STMPE1601_SYS_CTRL_ENABLE_KPC; | |
525 | ||
526 | return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL, mask, | |
527 | enable ? mask : 0); | |
528 | } | |
529 | ||
530 | static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) | |
531 | { | |
532 | switch (block) { | |
533 | case STMPE_BLOCK_PWM: | |
534 | return 2; | |
535 | ||
536 | case STMPE_BLOCK_KEYPAD: | |
537 | return 1; | |
538 | ||
539 | case STMPE_BLOCK_GPIO: | |
540 | default: | |
541 | return 0; | |
542 | } | |
543 | } | |
544 | ||
545 | static struct stmpe_variant_info stmpe1601 = { | |
546 | .name = "stmpe1601", | |
547 | .id_val = 0x0210, | |
548 | .id_mask = 0xfff0, /* at least 0x0210 and 0x0212 */ | |
549 | .num_gpios = 16, | |
550 | .af_bits = 2, | |
551 | .regs = stmpe1601_regs, | |
552 | .blocks = stmpe1601_blocks, | |
553 | .num_blocks = ARRAY_SIZE(stmpe1601_blocks), | |
554 | .num_irqs = STMPE1601_NR_INTERNAL_IRQS, | |
555 | .enable = stmpe1601_enable, | |
556 | .get_altfunc = stmpe1601_get_altfunc, | |
5981f4e6 | 557 | .enable_autosleep = stmpe1601_autosleep, |
27e34995 RV |
558 | }; |
559 | ||
560 | /* | |
561 | * STMPE24XX | |
562 | */ | |
563 | ||
564 | static const u8 stmpe24xx_regs[] = { | |
565 | [STMPE_IDX_CHIP_ID] = STMPE24XX_REG_CHIP_ID, | |
566 | [STMPE_IDX_ICR_LSB] = STMPE24XX_REG_ICR_LSB, | |
567 | [STMPE_IDX_IER_LSB] = STMPE24XX_REG_IER_LSB, | |
568 | [STMPE_IDX_ISR_MSB] = STMPE24XX_REG_ISR_MSB, | |
569 | [STMPE_IDX_GPMR_LSB] = STMPE24XX_REG_GPMR_LSB, | |
570 | [STMPE_IDX_GPSR_LSB] = STMPE24XX_REG_GPSR_LSB, | |
571 | [STMPE_IDX_GPCR_LSB] = STMPE24XX_REG_GPCR_LSB, | |
572 | [STMPE_IDX_GPDR_LSB] = STMPE24XX_REG_GPDR_LSB, | |
573 | [STMPE_IDX_GPRER_LSB] = STMPE24XX_REG_GPRER_LSB, | |
574 | [STMPE_IDX_GPFER_LSB] = STMPE24XX_REG_GPFER_LSB, | |
575 | [STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB, | |
576 | [STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB, | |
577 | [STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB, | |
578 | [STMPE_IDX_GPEDR_MSB] = STMPE24XX_REG_GPEDR_MSB, | |
579 | }; | |
580 | ||
581 | static struct stmpe_variant_block stmpe24xx_blocks[] = { | |
582 | { | |
583 | .cell = &stmpe_gpio_cell, | |
584 | .irq = STMPE24XX_IRQ_GPIOC, | |
585 | .block = STMPE_BLOCK_GPIO, | |
586 | }, | |
587 | { | |
588 | .cell = &stmpe_keypad_cell, | |
589 | .irq = STMPE24XX_IRQ_KEYPAD, | |
590 | .block = STMPE_BLOCK_KEYPAD, | |
591 | }, | |
592 | }; | |
593 | ||
594 | static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks, | |
595 | bool enable) | |
596 | { | |
597 | unsigned int mask = 0; | |
598 | ||
599 | if (blocks & STMPE_BLOCK_GPIO) | |
600 | mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO; | |
601 | ||
602 | if (blocks & STMPE_BLOCK_KEYPAD) | |
603 | mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC; | |
604 | ||
605 | return __stmpe_set_bits(stmpe, STMPE24XX_REG_SYS_CTRL, mask, | |
606 | enable ? mask : 0); | |
607 | } | |
608 | ||
609 | static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) | |
610 | { | |
611 | switch (block) { | |
612 | case STMPE_BLOCK_ROTATOR: | |
613 | return 2; | |
614 | ||
615 | case STMPE_BLOCK_KEYPAD: | |
616 | return 1; | |
617 | ||
618 | case STMPE_BLOCK_GPIO: | |
619 | default: | |
620 | return 0; | |
621 | } | |
622 | } | |
623 | ||
624 | static struct stmpe_variant_info stmpe2401 = { | |
625 | .name = "stmpe2401", | |
626 | .id_val = 0x0101, | |
627 | .id_mask = 0xffff, | |
628 | .num_gpios = 24, | |
629 | .af_bits = 2, | |
630 | .regs = stmpe24xx_regs, | |
631 | .blocks = stmpe24xx_blocks, | |
632 | .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), | |
633 | .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, | |
634 | .enable = stmpe24xx_enable, | |
635 | .get_altfunc = stmpe24xx_get_altfunc, | |
636 | }; | |
637 | ||
638 | static struct stmpe_variant_info stmpe2403 = { | |
639 | .name = "stmpe2403", | |
640 | .id_val = 0x0120, | |
641 | .id_mask = 0xffff, | |
642 | .num_gpios = 24, | |
643 | .af_bits = 2, | |
644 | .regs = stmpe24xx_regs, | |
645 | .blocks = stmpe24xx_blocks, | |
646 | .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), | |
647 | .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, | |
648 | .enable = stmpe24xx_enable, | |
649 | .get_altfunc = stmpe24xx_get_altfunc, | |
5981f4e6 | 650 | .enable_autosleep = stmpe1601_autosleep, /* same as stmpe1601 */ |
27e34995 RV |
651 | }; |
652 | ||
653 | static struct stmpe_variant_info *stmpe_variant_info[] = { | |
654 | [STMPE811] = &stmpe811, | |
655 | [STMPE1601] = &stmpe1601, | |
656 | [STMPE2401] = &stmpe2401, | |
657 | [STMPE2403] = &stmpe2403, | |
658 | }; | |
659 | ||
660 | static irqreturn_t stmpe_irq(int irq, void *data) | |
661 | { | |
662 | struct stmpe *stmpe = data; | |
663 | struct stmpe_variant_info *variant = stmpe->variant; | |
664 | int num = DIV_ROUND_UP(variant->num_irqs, 8); | |
665 | u8 israddr = stmpe->regs[STMPE_IDX_ISR_MSB]; | |
666 | u8 isr[num]; | |
667 | int ret; | |
668 | int i; | |
669 | ||
670 | ret = stmpe_block_read(stmpe, israddr, num, isr); | |
671 | if (ret < 0) | |
672 | return IRQ_NONE; | |
673 | ||
674 | for (i = 0; i < num; i++) { | |
675 | int bank = num - i - 1; | |
676 | u8 status = isr[i]; | |
677 | u8 clear; | |
678 | ||
679 | status &= stmpe->ier[bank]; | |
680 | if (!status) | |
681 | continue; | |
682 | ||
683 | clear = status; | |
684 | while (status) { | |
685 | int bit = __ffs(status); | |
686 | int line = bank * 8 + bit; | |
687 | ||
688 | handle_nested_irq(stmpe->irq_base + line); | |
689 | status &= ~(1 << bit); | |
690 | } | |
691 | ||
692 | stmpe_reg_write(stmpe, israddr + i, clear); | |
693 | } | |
694 | ||
695 | return IRQ_HANDLED; | |
696 | } | |
697 | ||
43b8c084 | 698 | static void stmpe_irq_lock(struct irq_data *data) |
27e34995 | 699 | { |
43b8c084 | 700 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
27e34995 RV |
701 | |
702 | mutex_lock(&stmpe->irq_lock); | |
703 | } | |
704 | ||
43b8c084 | 705 | static void stmpe_irq_sync_unlock(struct irq_data *data) |
27e34995 | 706 | { |
43b8c084 | 707 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
27e34995 RV |
708 | struct stmpe_variant_info *variant = stmpe->variant; |
709 | int num = DIV_ROUND_UP(variant->num_irqs, 8); | |
710 | int i; | |
711 | ||
712 | for (i = 0; i < num; i++) { | |
713 | u8 new = stmpe->ier[i]; | |
714 | u8 old = stmpe->oldier[i]; | |
715 | ||
716 | if (new == old) | |
717 | continue; | |
718 | ||
719 | stmpe->oldier[i] = new; | |
720 | stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB] - i, new); | |
721 | } | |
722 | ||
723 | mutex_unlock(&stmpe->irq_lock); | |
724 | } | |
725 | ||
43b8c084 | 726 | static void stmpe_irq_mask(struct irq_data *data) |
27e34995 | 727 | { |
43b8c084 MB |
728 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
729 | int offset = data->irq - stmpe->irq_base; | |
27e34995 RV |
730 | int regoffset = offset / 8; |
731 | int mask = 1 << (offset % 8); | |
732 | ||
733 | stmpe->ier[regoffset] &= ~mask; | |
734 | } | |
735 | ||
43b8c084 | 736 | static void stmpe_irq_unmask(struct irq_data *data) |
27e34995 | 737 | { |
43b8c084 MB |
738 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
739 | int offset = data->irq - stmpe->irq_base; | |
27e34995 RV |
740 | int regoffset = offset / 8; |
741 | int mask = 1 << (offset % 8); | |
742 | ||
743 | stmpe->ier[regoffset] |= mask; | |
744 | } | |
745 | ||
746 | static struct irq_chip stmpe_irq_chip = { | |
747 | .name = "stmpe", | |
43b8c084 MB |
748 | .irq_bus_lock = stmpe_irq_lock, |
749 | .irq_bus_sync_unlock = stmpe_irq_sync_unlock, | |
750 | .irq_mask = stmpe_irq_mask, | |
751 | .irq_unmask = stmpe_irq_unmask, | |
27e34995 RV |
752 | }; |
753 | ||
754 | static int __devinit stmpe_irq_init(struct stmpe *stmpe) | |
755 | { | |
756 | int num_irqs = stmpe->variant->num_irqs; | |
757 | int base = stmpe->irq_base; | |
758 | int irq; | |
759 | ||
760 | for (irq = base; irq < base + num_irqs; irq++) { | |
d5bb1221 TG |
761 | irq_set_chip_data(irq, stmpe); |
762 | irq_set_chip_and_handler(irq, &stmpe_irq_chip, | |
27e34995 | 763 | handle_edge_irq); |
d5bb1221 | 764 | irq_set_nested_thread(irq, 1); |
27e34995 RV |
765 | #ifdef CONFIG_ARM |
766 | set_irq_flags(irq, IRQF_VALID); | |
767 | #else | |
d5bb1221 | 768 | irq_set_noprobe(irq); |
27e34995 RV |
769 | #endif |
770 | } | |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
775 | static void stmpe_irq_remove(struct stmpe *stmpe) | |
776 | { | |
777 | int num_irqs = stmpe->variant->num_irqs; | |
778 | int base = stmpe->irq_base; | |
779 | int irq; | |
780 | ||
781 | for (irq = base; irq < base + num_irqs; irq++) { | |
782 | #ifdef CONFIG_ARM | |
783 | set_irq_flags(irq, 0); | |
784 | #endif | |
d5bb1221 TG |
785 | irq_set_chip_and_handler(irq, NULL, NULL); |
786 | irq_set_chip_data(irq, NULL); | |
27e34995 RV |
787 | } |
788 | } | |
789 | ||
790 | static int __devinit stmpe_chip_init(struct stmpe *stmpe) | |
791 | { | |
792 | unsigned int irq_trigger = stmpe->pdata->irq_trigger; | |
5981f4e6 | 793 | int autosleep_timeout = stmpe->pdata->autosleep_timeout; |
27e34995 RV |
794 | struct stmpe_variant_info *variant = stmpe->variant; |
795 | u8 icr = STMPE_ICR_LSB_GIM; | |
796 | unsigned int id; | |
797 | u8 data[2]; | |
798 | int ret; | |
799 | ||
800 | ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID], | |
801 | ARRAY_SIZE(data), data); | |
802 | if (ret < 0) | |
803 | return ret; | |
804 | ||
805 | id = (data[0] << 8) | data[1]; | |
806 | if ((id & variant->id_mask) != variant->id_val) { | |
807 | dev_err(stmpe->dev, "unknown chip id: %#x\n", id); | |
808 | return -EINVAL; | |
809 | } | |
810 | ||
811 | dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id); | |
812 | ||
813 | /* Disable all modules -- subdrivers should enable what they need. */ | |
814 | ret = stmpe_disable(stmpe, ~0); | |
815 | if (ret) | |
816 | return ret; | |
817 | ||
818 | if (irq_trigger == IRQF_TRIGGER_FALLING || | |
819 | irq_trigger == IRQF_TRIGGER_RISING) | |
820 | icr |= STMPE_ICR_LSB_EDGE; | |
821 | ||
822 | if (irq_trigger == IRQF_TRIGGER_RISING || | |
823 | irq_trigger == IRQF_TRIGGER_HIGH) | |
824 | icr |= STMPE_ICR_LSB_HIGH; | |
825 | ||
826 | if (stmpe->pdata->irq_invert_polarity) | |
827 | icr ^= STMPE_ICR_LSB_HIGH; | |
828 | ||
5981f4e6 SI |
829 | if (stmpe->pdata->autosleep) { |
830 | ret = stmpe_autosleep(stmpe, autosleep_timeout); | |
831 | if (ret) | |
832 | return ret; | |
833 | } | |
834 | ||
27e34995 RV |
835 | return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr); |
836 | } | |
837 | ||
838 | static int __devinit stmpe_add_device(struct stmpe *stmpe, | |
839 | struct mfd_cell *cell, int irq) | |
840 | { | |
841 | return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1, | |
842 | NULL, stmpe->irq_base + irq); | |
843 | } | |
844 | ||
845 | static int __devinit stmpe_devices_init(struct stmpe *stmpe) | |
846 | { | |
847 | struct stmpe_variant_info *variant = stmpe->variant; | |
848 | unsigned int platform_blocks = stmpe->pdata->blocks; | |
849 | int ret = -EINVAL; | |
850 | int i; | |
851 | ||
852 | for (i = 0; i < variant->num_blocks; i++) { | |
853 | struct stmpe_variant_block *block = &variant->blocks[i]; | |
854 | ||
855 | if (!(platform_blocks & block->block)) | |
856 | continue; | |
857 | ||
858 | platform_blocks &= ~block->block; | |
859 | ret = stmpe_add_device(stmpe, block->cell, block->irq); | |
860 | if (ret) | |
861 | return ret; | |
862 | } | |
863 | ||
864 | if (platform_blocks) | |
865 | dev_warn(stmpe->dev, | |
866 | "platform wants blocks (%#x) not present on variant", | |
867 | platform_blocks); | |
868 | ||
869 | return ret; | |
870 | } | |
871 | ||
1a6e4b74 VK |
872 | /* Called from client specific probe routines */ |
873 | int stmpe_probe(struct stmpe_client_info *ci, int partnum) | |
208c4343 | 874 | { |
1a6e4b74 | 875 | struct stmpe_platform_data *pdata = dev_get_platdata(ci->dev); |
27e34995 RV |
876 | struct stmpe *stmpe; |
877 | int ret; | |
878 | ||
879 | if (!pdata) | |
880 | return -EINVAL; | |
881 | ||
882 | stmpe = kzalloc(sizeof(struct stmpe), GFP_KERNEL); | |
883 | if (!stmpe) | |
884 | return -ENOMEM; | |
885 | ||
886 | mutex_init(&stmpe->irq_lock); | |
887 | mutex_init(&stmpe->lock); | |
888 | ||
1a6e4b74 VK |
889 | stmpe->dev = ci->dev; |
890 | stmpe->client = ci->client; | |
27e34995 RV |
891 | stmpe->pdata = pdata; |
892 | stmpe->irq_base = pdata->irq_base; | |
1a6e4b74 VK |
893 | stmpe->ci = ci; |
894 | stmpe->partnum = partnum; | |
895 | stmpe->variant = stmpe_variant_info[partnum]; | |
27e34995 RV |
896 | stmpe->regs = stmpe->variant->regs; |
897 | stmpe->num_gpios = stmpe->variant->num_gpios; | |
1a6e4b74 | 898 | dev_set_drvdata(stmpe->dev, stmpe); |
27e34995 | 899 | |
1a6e4b74 VK |
900 | if (ci->init) |
901 | ci->init(stmpe); | |
27e34995 | 902 | |
73de16db VK |
903 | if (pdata->irq_over_gpio) { |
904 | ret = gpio_request_one(pdata->irq_gpio, GPIOF_DIR_IN, "stmpe"); | |
905 | if (ret) { | |
906 | dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n", | |
907 | ret); | |
908 | goto out_free; | |
909 | } | |
910 | ||
911 | stmpe->irq = gpio_to_irq(pdata->irq_gpio); | |
912 | } else { | |
1a6e4b74 | 913 | stmpe->irq = ci->irq; |
73de16db VK |
914 | } |
915 | ||
27e34995 RV |
916 | ret = stmpe_chip_init(stmpe); |
917 | if (ret) | |
73de16db | 918 | goto free_gpio; |
27e34995 RV |
919 | |
920 | ret = stmpe_irq_init(stmpe); | |
921 | if (ret) | |
73de16db | 922 | goto free_gpio; |
27e34995 | 923 | |
73de16db | 924 | ret = request_threaded_irq(stmpe->irq, NULL, stmpe_irq, |
1a6e4b74 | 925 | pdata->irq_trigger | IRQF_ONESHOT, "stmpe", stmpe); |
27e34995 RV |
926 | if (ret) { |
927 | dev_err(stmpe->dev, "failed to request IRQ: %d\n", ret); | |
928 | goto out_removeirq; | |
929 | } | |
930 | ||
931 | ret = stmpe_devices_init(stmpe); | |
932 | if (ret) { | |
933 | dev_err(stmpe->dev, "failed to add children\n"); | |
934 | goto out_removedevs; | |
935 | } | |
936 | ||
937 | return 0; | |
938 | ||
939 | out_removedevs: | |
940 | mfd_remove_devices(stmpe->dev); | |
73de16db | 941 | free_irq(stmpe->irq, stmpe); |
27e34995 RV |
942 | out_removeirq: |
943 | stmpe_irq_remove(stmpe); | |
73de16db VK |
944 | free_gpio: |
945 | if (pdata->irq_over_gpio) | |
946 | gpio_free(pdata->irq_gpio); | |
27e34995 RV |
947 | out_free: |
948 | kfree(stmpe); | |
949 | return ret; | |
950 | } | |
951 | ||
1a6e4b74 | 952 | int stmpe_remove(struct stmpe *stmpe) |
27e34995 | 953 | { |
27e34995 RV |
954 | mfd_remove_devices(stmpe->dev); |
955 | ||
73de16db | 956 | free_irq(stmpe->irq, stmpe); |
27e34995 RV |
957 | stmpe_irq_remove(stmpe); |
958 | ||
73de16db VK |
959 | if (stmpe->pdata->irq_over_gpio) |
960 | gpio_free(stmpe->pdata->irq_gpio); | |
961 | ||
27e34995 RV |
962 | kfree(stmpe); |
963 | ||
964 | return 0; | |
965 | } | |
966 | ||
208c4343 | 967 | #ifdef CONFIG_PM |
1a6e4b74 VK |
968 | static int stmpe_suspend(struct device *dev) |
969 | { | |
970 | struct stmpe *stmpe = dev_get_drvdata(dev); | |
208c4343 | 971 | |
1a6e4b74 VK |
972 | if (device_may_wakeup(dev)) |
973 | enable_irq_wake(stmpe->irq); | |
27e34995 | 974 | |
1a6e4b74 | 975 | return 0; |
27e34995 | 976 | } |
27e34995 | 977 | |
1a6e4b74 | 978 | static int stmpe_resume(struct device *dev) |
27e34995 | 979 | { |
1a6e4b74 VK |
980 | struct stmpe *stmpe = dev_get_drvdata(dev); |
981 | ||
982 | if (device_may_wakeup(dev)) | |
983 | disable_irq_wake(stmpe->irq); | |
984 | ||
985 | return 0; | |
27e34995 | 986 | } |
27e34995 | 987 | |
1a6e4b74 VK |
988 | const struct dev_pm_ops stmpe_dev_pm_ops = { |
989 | .suspend = stmpe_suspend, | |
990 | .resume = stmpe_resume, | |
991 | }; | |
992 | #endif |