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Commit | Line | Data |
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966cdc96 MB |
1 | /* |
2 | * Arizona interrupt support | |
3 | * | |
4 | * Copyright 2012 Wolfson Microelectronics plc | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/delay.h> | |
14 | #include <linux/gpio.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/irq.h> | |
17 | #include <linux/irqdomain.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/pm_runtime.h> | |
20 | #include <linux/regmap.h> | |
21 | #include <linux/regulator/consumer.h> | |
22 | #include <linux/slab.h> | |
23 | ||
24 | #include <linux/mfd/arizona/core.h> | |
25 | #include <linux/mfd/arizona/registers.h> | |
26 | ||
27 | #include "arizona.h" | |
28 | ||
1a86dcb3 CK |
29 | #define ARIZONA_AOD_IRQ_INDEX 0 |
30 | #define ARIZONA_MAIN_IRQ_INDEX 1 | |
31 | ||
966cdc96 MB |
32 | static int arizona_map_irq(struct arizona *arizona, int irq) |
33 | { | |
34 | int ret; | |
35 | ||
ea1f3339 RF |
36 | if (arizona->aod_irq_chip) { |
37 | ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq); | |
38 | if (ret >= 0) | |
39 | return ret; | |
40 | } | |
966cdc96 | 41 | |
ea1f3339 | 42 | return regmap_irq_get_virq(arizona->irq_chip, irq); |
966cdc96 MB |
43 | } |
44 | ||
45 | int arizona_request_irq(struct arizona *arizona, int irq, char *name, | |
46 | irq_handler_t handler, void *data) | |
47 | { | |
48 | irq = arizona_map_irq(arizona, irq); | |
49 | if (irq < 0) | |
50 | return irq; | |
51 | ||
52 | return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, | |
53 | name, data); | |
54 | } | |
55 | EXPORT_SYMBOL_GPL(arizona_request_irq); | |
56 | ||
57 | void arizona_free_irq(struct arizona *arizona, int irq, void *data) | |
58 | { | |
59 | irq = arizona_map_irq(arizona, irq); | |
60 | if (irq < 0) | |
61 | return; | |
62 | ||
63 | free_irq(irq, data); | |
64 | } | |
65 | EXPORT_SYMBOL_GPL(arizona_free_irq); | |
66 | ||
67 | int arizona_set_irq_wake(struct arizona *arizona, int irq, int on) | |
68 | { | |
69 | irq = arizona_map_irq(arizona, irq); | |
70 | if (irq < 0) | |
71 | return irq; | |
72 | ||
73 | return irq_set_irq_wake(irq, on); | |
74 | } | |
75 | EXPORT_SYMBOL_GPL(arizona_set_irq_wake); | |
76 | ||
77 | static irqreturn_t arizona_boot_done(int irq, void *data) | |
78 | { | |
79 | struct arizona *arizona = data; | |
80 | ||
81 | dev_dbg(arizona->dev, "Boot done\n"); | |
82 | ||
83 | return IRQ_HANDLED; | |
84 | } | |
85 | ||
86 | static irqreturn_t arizona_ctrlif_err(int irq, void *data) | |
87 | { | |
88 | struct arizona *arizona = data; | |
89 | ||
90 | /* | |
91 | * For pretty much all potential sources a register cache sync | |
92 | * won't help, we've just got a software bug somewhere. | |
93 | */ | |
94 | dev_err(arizona->dev, "Control interface error\n"); | |
95 | ||
96 | return IRQ_HANDLED; | |
97 | } | |
98 | ||
99 | static irqreturn_t arizona_irq_thread(int irq, void *data) | |
100 | { | |
101 | struct arizona *arizona = data; | |
3092f805 | 102 | bool poll; |
3080de4e | 103 | unsigned int val; |
cdabc1c8 | 104 | int ret; |
966cdc96 MB |
105 | |
106 | ret = pm_runtime_get_sync(arizona->dev); | |
107 | if (ret < 0) { | |
108 | dev_err(arizona->dev, "Failed to resume device: %d\n", ret); | |
109 | return IRQ_NONE; | |
110 | } | |
111 | ||
3092f805 MB |
112 | do { |
113 | poll = false; | |
114 | ||
1f2c3972 RF |
115 | if (arizona->aod_irq_chip) { |
116 | /* | |
117 | * Check the AOD status register to determine whether | |
118 | * the nested IRQ handler should be called. | |
119 | */ | |
120 | ret = regmap_read(arizona->regmap, | |
121 | ARIZONA_AOD_IRQ1, &val); | |
122 | if (ret) | |
123 | dev_warn(arizona->dev, | |
124 | "Failed to read AOD IRQ1 %d\n", ret); | |
125 | else if (val) | |
126 | handle_nested_irq( | |
127 | irq_find_mapping(arizona->virq, 0)); | |
128 | } | |
3092f805 MB |
129 | |
130 | /* | |
131 | * Check if one of the main interrupts is asserted and only | |
132 | * check that domain if it is. | |
133 | */ | |
134 | ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS, | |
135 | &val); | |
136 | if (ret == 0 && val & ARIZONA_IRQ1_STS) { | |
137 | handle_nested_irq(irq_find_mapping(arizona->virq, 1)); | |
138 | } else if (ret != 0) { | |
139 | dev_err(arizona->dev, | |
140 | "Failed to read main IRQ status: %d\n", ret); | |
141 | } | |
3080de4e | 142 | |
3092f805 MB |
143 | /* |
144 | * Poll the IRQ pin status to see if we're really done | |
145 | * if the interrupt controller can't do it for us. | |
146 | */ | |
147 | if (!arizona->pdata.irq_gpio) { | |
148 | break; | |
149 | } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING && | |
150 | gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { | |
151 | poll = true; | |
152 | } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING && | |
153 | !gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { | |
154 | poll = true; | |
155 | } | |
156 | } while (poll); | |
966cdc96 MB |
157 | |
158 | pm_runtime_mark_last_busy(arizona->dev); | |
159 | pm_runtime_put_autosuspend(arizona->dev); | |
160 | ||
161 | return IRQ_HANDLED; | |
162 | } | |
163 | ||
164 | static void arizona_irq_enable(struct irq_data *data) | |
165 | { | |
166 | } | |
167 | ||
168 | static void arizona_irq_disable(struct irq_data *data) | |
169 | { | |
170 | } | |
171 | ||
c38715fe CK |
172 | static int arizona_irq_set_wake(struct irq_data *data, unsigned int on) |
173 | { | |
174 | struct arizona *arizona = irq_data_get_irq_chip_data(data); | |
175 | ||
176 | return irq_set_irq_wake(arizona->irq, on); | |
177 | } | |
178 | ||
966cdc96 MB |
179 | static struct irq_chip arizona_irq_chip = { |
180 | .name = "arizona", | |
181 | .irq_disable = arizona_irq_disable, | |
182 | .irq_enable = arizona_irq_enable, | |
c38715fe | 183 | .irq_set_wake = arizona_irq_set_wake, |
966cdc96 MB |
184 | }; |
185 | ||
dedf24a2 | 186 | static struct lock_class_key arizona_irq_lock_class; |
39c3fd58 | 187 | static struct lock_class_key arizona_irq_request_class; |
dedf24a2 | 188 | |
966cdc96 MB |
189 | static int arizona_irq_map(struct irq_domain *h, unsigned int virq, |
190 | irq_hw_number_t hw) | |
191 | { | |
0a464dfd | 192 | struct arizona *data = h->host_data; |
966cdc96 MB |
193 | |
194 | irq_set_chip_data(virq, data); | |
39c3fd58 AL |
195 | irq_set_lockdep_class(virq, &arizona_irq_lock_class, |
196 | &arizona_irq_request_class); | |
cfeb35da | 197 | irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq); |
966cdc96 | 198 | irq_set_nested_thread(virq, 1); |
966cdc96 | 199 | irq_set_noprobe(virq); |
966cdc96 MB |
200 | |
201 | return 0; | |
202 | } | |
203 | ||
7ce7b26f | 204 | static const struct irq_domain_ops arizona_domain_ops = { |
966cdc96 MB |
205 | .map = arizona_irq_map, |
206 | .xlate = irq_domain_xlate_twocell, | |
207 | }; | |
208 | ||
209 | int arizona_irq_init(struct arizona *arizona) | |
210 | { | |
211 | int flags = IRQF_ONESHOT; | |
003db34e | 212 | int ret; |
966cdc96 | 213 | const struct regmap_irq_chip *aod, *irq; |
22c75fe7 | 214 | struct irq_data *irq_data; |
3dfaff27 | 215 | unsigned int virq; |
966cdc96 | 216 | |
30a2af3a CK |
217 | arizona->ctrlif_error = true; |
218 | ||
966cdc96 | 219 | switch (arizona->type) { |
863df8d5 | 220 | #ifdef CONFIG_MFD_WM5102 |
966cdc96 MB |
221 | case WM5102: |
222 | aod = &wm5102_aod; | |
223 | irq = &wm5102_irq; | |
92d80139 | 224 | |
30a2af3a | 225 | arizona->ctrlif_error = false; |
966cdc96 | 226 | break; |
e102befe MB |
227 | #endif |
228 | #ifdef CONFIG_MFD_WM5110 | |
229 | case WM5110: | |
e5d4ef0d | 230 | case WM8280: |
e102befe | 231 | aod = &wm5110_aod; |
3215501f CK |
232 | |
233 | switch (arizona->rev) { | |
234 | case 0 ... 2: | |
235 | irq = &wm5110_irq; | |
236 | break; | |
237 | default: | |
238 | irq = &wm5110_revd_irq; | |
239 | break; | |
240 | } | |
92d80139 | 241 | |
30a2af3a | 242 | arizona->ctrlif_error = false; |
e102befe | 243 | break; |
863df8d5 | 244 | #endif |
ea1f3339 RF |
245 | #ifdef CONFIG_MFD_CS47L24 |
246 | case WM1831: | |
247 | case CS47L24: | |
248 | aod = NULL; | |
249 | irq = &cs47l24_irq; | |
250 | ||
251 | arizona->ctrlif_error = false; | |
252 | break; | |
253 | #endif | |
dc7d4863 CK |
254 | #ifdef CONFIG_MFD_WM8997 |
255 | case WM8997: | |
256 | aod = &wm8997_aod; | |
257 | irq = &wm8997_irq; | |
258 | ||
30a2af3a | 259 | arizona->ctrlif_error = false; |
dc7d4863 CK |
260 | break; |
261 | #endif | |
6887b042 RF |
262 | #ifdef CONFIG_MFD_WM8998 |
263 | case WM8998: | |
264 | case WM1814: | |
265 | aod = &wm8998_aod; | |
266 | irq = &wm8998_irq; | |
267 | ||
268 | arizona->ctrlif_error = false; | |
269 | break; | |
270 | #endif | |
966cdc96 MB |
271 | default: |
272 | BUG_ON("Unknown Arizona class device" == NULL); | |
273 | return -EINVAL; | |
274 | } | |
275 | ||
1816cb34 MB |
276 | /* Disable all wake sources by default */ |
277 | regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0); | |
278 | ||
22c75fe7 MB |
279 | /* Read the flags from the interrupt controller if not specified */ |
280 | if (!arizona->pdata.irq_flags) { | |
281 | irq_data = irq_get_irq_data(arizona->irq); | |
282 | if (!irq_data) { | |
283 | dev_err(arizona->dev, "Invalid IRQ: %d\n", | |
284 | arizona->irq); | |
285 | return -EINVAL; | |
286 | } | |
287 | ||
288 | arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data); | |
289 | switch (arizona->pdata.irq_flags) { | |
290 | case IRQF_TRIGGER_LOW: | |
291 | case IRQF_TRIGGER_HIGH: | |
292 | case IRQF_TRIGGER_RISING: | |
293 | case IRQF_TRIGGER_FALLING: | |
294 | break; | |
295 | ||
296 | case IRQ_TYPE_NONE: | |
297 | default: | |
298 | /* Device default */ | |
299 | arizona->pdata.irq_flags = IRQF_TRIGGER_LOW; | |
300 | break; | |
301 | } | |
302 | } | |
f8a0941f MB |
303 | |
304 | if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH | | |
305 | IRQF_TRIGGER_RISING)) { | |
966cdc96 MB |
306 | ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1, |
307 | ARIZONA_IRQ_POL, 0); | |
308 | if (ret != 0) { | |
309 | dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n", | |
310 | ret); | |
311 | goto err; | |
312 | } | |
966cdc96 MB |
313 | } |
314 | ||
f8a0941f MB |
315 | flags |= arizona->pdata.irq_flags; |
316 | ||
966cdc96 MB |
317 | /* Allocate a virtual IRQ domain to distribute to the regmap domains */ |
318 | arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops, | |
319 | arizona); | |
320 | if (!arizona->virq) { | |
b7dea5dc | 321 | dev_err(arizona->dev, "Failed to add core IRQ domain\n"); |
966cdc96 MB |
322 | ret = -EINVAL; |
323 | goto err; | |
324 | } | |
325 | ||
ea1f3339 | 326 | if (aod) { |
3dfaff27 CK |
327 | virq = irq_create_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX); |
328 | if (!virq) { | |
329 | dev_err(arizona->dev, "Failed to map AOD IRQs\n"); | |
330 | ret = -EINVAL; | |
331 | goto err_domain; | |
332 | } | |
333 | ||
334 | ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT, | |
335 | 0, aod, &arizona->aod_irq_chip); | |
ea1f3339 RF |
336 | if (ret != 0) { |
337 | dev_err(arizona->dev, | |
338 | "Failed to add AOD IRQs: %d\n", ret); | |
3dfaff27 | 339 | goto err_map_aod; |
ea1f3339 | 340 | } |
966cdc96 MB |
341 | } |
342 | ||
3dfaff27 CK |
343 | virq = irq_create_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX); |
344 | if (!virq) { | |
345 | dev_err(arizona->dev, "Failed to map main IRQs\n"); | |
346 | ret = -EINVAL; | |
347 | goto err_aod; | |
348 | } | |
349 | ||
350 | ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT, | |
351 | 0, irq, &arizona->irq_chip); | |
966cdc96 | 352 | if (ret != 0) { |
d1cb4cc9 | 353 | dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret); |
3dfaff27 | 354 | goto err_map_main_irq; |
966cdc96 MB |
355 | } |
356 | ||
3092f805 MB |
357 | /* Used to emulate edge trigger and to work around broken pinmux */ |
358 | if (arizona->pdata.irq_gpio) { | |
359 | if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) { | |
360 | dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n", | |
361 | arizona->irq, arizona->pdata.irq_gpio, | |
362 | gpio_to_irq(arizona->pdata.irq_gpio)); | |
363 | arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio); | |
364 | } | |
365 | ||
366 | ret = devm_gpio_request_one(arizona->dev, | |
367 | arizona->pdata.irq_gpio, | |
368 | GPIOF_IN, "arizona IRQ"); | |
369 | if (ret != 0) { | |
370 | dev_err(arizona->dev, | |
371 | "Failed to request IRQ GPIO %d:: %d\n", | |
372 | arizona->pdata.irq_gpio, ret); | |
373 | arizona->pdata.irq_gpio = 0; | |
374 | } | |
375 | } | |
376 | ||
966cdc96 MB |
377 | ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread, |
378 | flags, "arizona", arizona); | |
379 | ||
380 | if (ret != 0) { | |
7994c664 | 381 | dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n", |
966cdc96 MB |
382 | arizona->irq, ret); |
383 | goto err_main_irq; | |
384 | } | |
385 | ||
6c006b1b | 386 | /* Make sure the boot done IRQ is unmasked for resumes */ |
003db34e CK |
387 | ret = arizona_request_irq(arizona, ARIZONA_IRQ_BOOT_DONE, "Boot done", |
388 | arizona_boot_done, arizona); | |
6c006b1b CK |
389 | if (ret != 0) { |
390 | dev_err(arizona->dev, "Failed to request boot done %d: %d\n", | |
391 | arizona->irq, ret); | |
392 | goto err_boot_done; | |
393 | } | |
394 | ||
395 | /* Handle control interface errors in the core */ | |
396 | if (arizona->ctrlif_error) { | |
003db34e CK |
397 | ret = arizona_request_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, |
398 | "Control interface error", | |
399 | arizona_ctrlif_err, arizona); | |
6c006b1b CK |
400 | if (ret != 0) { |
401 | dev_err(arizona->dev, | |
402 | "Failed to request CTRLIF_ERR %d: %d\n", | |
403 | arizona->irq, ret); | |
404 | goto err_ctrlif; | |
405 | } | |
406 | } | |
407 | ||
966cdc96 MB |
408 | return 0; |
409 | ||
966cdc96 | 410 | err_ctrlif: |
003db34e | 411 | arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona); |
966cdc96 | 412 | err_boot_done: |
6c006b1b CK |
413 | free_irq(arizona->irq, arizona); |
414 | err_main_irq: | |
1a86dcb3 CK |
415 | regmap_del_irq_chip(irq_find_mapping(arizona->virq, |
416 | ARIZONA_MAIN_IRQ_INDEX), | |
966cdc96 | 417 | arizona->irq_chip); |
3dfaff27 CK |
418 | err_map_main_irq: |
419 | irq_dispose_mapping(irq_find_mapping(arizona->virq, | |
420 | ARIZONA_MAIN_IRQ_INDEX)); | |
966cdc96 | 421 | err_aod: |
1a86dcb3 CK |
422 | regmap_del_irq_chip(irq_find_mapping(arizona->virq, |
423 | ARIZONA_AOD_IRQ_INDEX), | |
966cdc96 | 424 | arizona->aod_irq_chip); |
3dfaff27 CK |
425 | err_map_aod: |
426 | irq_dispose_mapping(irq_find_mapping(arizona->virq, | |
427 | ARIZONA_AOD_IRQ_INDEX)); | |
428 | err_domain: | |
429 | irq_domain_remove(arizona->virq); | |
966cdc96 MB |
430 | err: |
431 | return ret; | |
432 | } | |
433 | ||
434 | int arizona_irq_exit(struct arizona *arizona) | |
435 | { | |
3dfaff27 CK |
436 | unsigned int virq; |
437 | ||
30a2af3a | 438 | if (arizona->ctrlif_error) |
003db34e CK |
439 | arizona_free_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, arizona); |
440 | arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona); | |
441 | ||
3dfaff27 CK |
442 | virq = irq_find_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX); |
443 | regmap_del_irq_chip(virq, arizona->irq_chip); | |
444 | irq_dispose_mapping(virq); | |
445 | ||
446 | virq = irq_find_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX); | |
447 | regmap_del_irq_chip(virq, arizona->aod_irq_chip); | |
448 | irq_dispose_mapping(virq); | |
449 | ||
450 | irq_domain_remove(arizona->virq); | |
451 | ||
966cdc96 MB |
452 | free_irq(arizona->irq, arizona); |
453 | ||
454 | return 0; | |
455 | } |