Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
966cdc96 MB |
2 | /* |
3 | * Arizona interrupt support | |
4 | * | |
5 | * Copyright 2012 Wolfson Microelectronics plc | |
6 | * | |
7 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
966cdc96 MB |
8 | */ |
9 | ||
10 | #include <linux/delay.h> | |
11 | #include <linux/gpio.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/irq.h> | |
14 | #include <linux/irqdomain.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/pm_runtime.h> | |
17 | #include <linux/regmap.h> | |
18 | #include <linux/regulator/consumer.h> | |
19 | #include <linux/slab.h> | |
20 | ||
21 | #include <linux/mfd/arizona/core.h> | |
22 | #include <linux/mfd/arizona/registers.h> | |
23 | ||
24 | #include "arizona.h" | |
25 | ||
1a86dcb3 CK |
26 | #define ARIZONA_AOD_IRQ_INDEX 0 |
27 | #define ARIZONA_MAIN_IRQ_INDEX 1 | |
28 | ||
966cdc96 MB |
29 | static int arizona_map_irq(struct arizona *arizona, int irq) |
30 | { | |
31 | int ret; | |
32 | ||
ea1f3339 RF |
33 | if (arizona->aod_irq_chip) { |
34 | ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq); | |
35 | if (ret >= 0) | |
36 | return ret; | |
37 | } | |
966cdc96 | 38 | |
ea1f3339 | 39 | return regmap_irq_get_virq(arizona->irq_chip, irq); |
966cdc96 MB |
40 | } |
41 | ||
42 | int arizona_request_irq(struct arizona *arizona, int irq, char *name, | |
43 | irq_handler_t handler, void *data) | |
44 | { | |
45 | irq = arizona_map_irq(arizona, irq); | |
46 | if (irq < 0) | |
47 | return irq; | |
48 | ||
49 | return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, | |
50 | name, data); | |
51 | } | |
52 | EXPORT_SYMBOL_GPL(arizona_request_irq); | |
53 | ||
54 | void arizona_free_irq(struct arizona *arizona, int irq, void *data) | |
55 | { | |
56 | irq = arizona_map_irq(arizona, irq); | |
57 | if (irq < 0) | |
58 | return; | |
59 | ||
60 | free_irq(irq, data); | |
61 | } | |
62 | EXPORT_SYMBOL_GPL(arizona_free_irq); | |
63 | ||
64 | int arizona_set_irq_wake(struct arizona *arizona, int irq, int on) | |
65 | { | |
66 | irq = arizona_map_irq(arizona, irq); | |
67 | if (irq < 0) | |
68 | return irq; | |
69 | ||
70 | return irq_set_irq_wake(irq, on); | |
71 | } | |
72 | EXPORT_SYMBOL_GPL(arizona_set_irq_wake); | |
73 | ||
74 | static irqreturn_t arizona_boot_done(int irq, void *data) | |
75 | { | |
76 | struct arizona *arizona = data; | |
77 | ||
78 | dev_dbg(arizona->dev, "Boot done\n"); | |
79 | ||
80 | return IRQ_HANDLED; | |
81 | } | |
82 | ||
83 | static irqreturn_t arizona_ctrlif_err(int irq, void *data) | |
84 | { | |
85 | struct arizona *arizona = data; | |
86 | ||
87 | /* | |
88 | * For pretty much all potential sources a register cache sync | |
89 | * won't help, we've just got a software bug somewhere. | |
90 | */ | |
91 | dev_err(arizona->dev, "Control interface error\n"); | |
92 | ||
93 | return IRQ_HANDLED; | |
94 | } | |
95 | ||
96 | static irqreturn_t arizona_irq_thread(int irq, void *data) | |
97 | { | |
98 | struct arizona *arizona = data; | |
3092f805 | 99 | bool poll; |
3080de4e | 100 | unsigned int val; |
cdabc1c8 | 101 | int ret; |
966cdc96 | 102 | |
fe6df2b4 | 103 | ret = pm_runtime_resume_and_get(arizona->dev); |
966cdc96 MB |
104 | if (ret < 0) { |
105 | dev_err(arizona->dev, "Failed to resume device: %d\n", ret); | |
106 | return IRQ_NONE; | |
107 | } | |
108 | ||
3092f805 MB |
109 | do { |
110 | poll = false; | |
111 | ||
1f2c3972 RF |
112 | if (arizona->aod_irq_chip) { |
113 | /* | |
114 | * Check the AOD status register to determine whether | |
115 | * the nested IRQ handler should be called. | |
116 | */ | |
117 | ret = regmap_read(arizona->regmap, | |
118 | ARIZONA_AOD_IRQ1, &val); | |
119 | if (ret) | |
120 | dev_warn(arizona->dev, | |
121 | "Failed to read AOD IRQ1 %d\n", ret); | |
122 | else if (val) | |
123 | handle_nested_irq( | |
124 | irq_find_mapping(arizona->virq, 0)); | |
125 | } | |
3092f805 MB |
126 | |
127 | /* | |
128 | * Check if one of the main interrupts is asserted and only | |
129 | * check that domain if it is. | |
130 | */ | |
131 | ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS, | |
132 | &val); | |
133 | if (ret == 0 && val & ARIZONA_IRQ1_STS) { | |
134 | handle_nested_irq(irq_find_mapping(arizona->virq, 1)); | |
135 | } else if (ret != 0) { | |
136 | dev_err(arizona->dev, | |
137 | "Failed to read main IRQ status: %d\n", ret); | |
138 | } | |
3080de4e | 139 | |
3092f805 MB |
140 | /* |
141 | * Poll the IRQ pin status to see if we're really done | |
142 | * if the interrupt controller can't do it for us. | |
143 | */ | |
144 | if (!arizona->pdata.irq_gpio) { | |
145 | break; | |
146 | } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING && | |
147 | gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { | |
148 | poll = true; | |
149 | } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING && | |
150 | !gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { | |
151 | poll = true; | |
152 | } | |
153 | } while (poll); | |
966cdc96 MB |
154 | |
155 | pm_runtime_mark_last_busy(arizona->dev); | |
156 | pm_runtime_put_autosuspend(arizona->dev); | |
157 | ||
158 | return IRQ_HANDLED; | |
159 | } | |
160 | ||
161 | static void arizona_irq_enable(struct irq_data *data) | |
162 | { | |
163 | } | |
164 | ||
165 | static void arizona_irq_disable(struct irq_data *data) | |
166 | { | |
167 | } | |
168 | ||
c38715fe CK |
169 | static int arizona_irq_set_wake(struct irq_data *data, unsigned int on) |
170 | { | |
171 | struct arizona *arizona = irq_data_get_irq_chip_data(data); | |
172 | ||
173 | return irq_set_irq_wake(arizona->irq, on); | |
174 | } | |
175 | ||
966cdc96 MB |
176 | static struct irq_chip arizona_irq_chip = { |
177 | .name = "arizona", | |
178 | .irq_disable = arizona_irq_disable, | |
179 | .irq_enable = arizona_irq_enable, | |
c38715fe | 180 | .irq_set_wake = arizona_irq_set_wake, |
966cdc96 MB |
181 | }; |
182 | ||
dedf24a2 | 183 | static struct lock_class_key arizona_irq_lock_class; |
39c3fd58 | 184 | static struct lock_class_key arizona_irq_request_class; |
dedf24a2 | 185 | |
966cdc96 MB |
186 | static int arizona_irq_map(struct irq_domain *h, unsigned int virq, |
187 | irq_hw_number_t hw) | |
188 | { | |
0a464dfd | 189 | struct arizona *data = h->host_data; |
966cdc96 MB |
190 | |
191 | irq_set_chip_data(virq, data); | |
39c3fd58 AL |
192 | irq_set_lockdep_class(virq, &arizona_irq_lock_class, |
193 | &arizona_irq_request_class); | |
cfeb35da | 194 | irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq); |
966cdc96 | 195 | irq_set_nested_thread(virq, 1); |
966cdc96 | 196 | irq_set_noprobe(virq); |
966cdc96 MB |
197 | |
198 | return 0; | |
199 | } | |
200 | ||
7ce7b26f | 201 | static const struct irq_domain_ops arizona_domain_ops = { |
966cdc96 MB |
202 | .map = arizona_irq_map, |
203 | .xlate = irq_domain_xlate_twocell, | |
204 | }; | |
205 | ||
206 | int arizona_irq_init(struct arizona *arizona) | |
207 | { | |
208 | int flags = IRQF_ONESHOT; | |
003db34e | 209 | int ret; |
966cdc96 | 210 | const struct regmap_irq_chip *aod, *irq; |
22c75fe7 | 211 | struct irq_data *irq_data; |
3dfaff27 | 212 | unsigned int virq; |
966cdc96 | 213 | |
30a2af3a CK |
214 | arizona->ctrlif_error = true; |
215 | ||
966cdc96 | 216 | switch (arizona->type) { |
863df8d5 | 217 | #ifdef CONFIG_MFD_WM5102 |
966cdc96 MB |
218 | case WM5102: |
219 | aod = &wm5102_aod; | |
220 | irq = &wm5102_irq; | |
92d80139 | 221 | |
30a2af3a | 222 | arizona->ctrlif_error = false; |
966cdc96 | 223 | break; |
e102befe MB |
224 | #endif |
225 | #ifdef CONFIG_MFD_WM5110 | |
226 | case WM5110: | |
e5d4ef0d | 227 | case WM8280: |
e102befe | 228 | aod = &wm5110_aod; |
3215501f CK |
229 | |
230 | switch (arizona->rev) { | |
231 | case 0 ... 2: | |
232 | irq = &wm5110_irq; | |
233 | break; | |
234 | default: | |
235 | irq = &wm5110_revd_irq; | |
236 | break; | |
237 | } | |
92d80139 | 238 | |
30a2af3a | 239 | arizona->ctrlif_error = false; |
e102befe | 240 | break; |
863df8d5 | 241 | #endif |
ea1f3339 RF |
242 | #ifdef CONFIG_MFD_CS47L24 |
243 | case WM1831: | |
244 | case CS47L24: | |
245 | aod = NULL; | |
246 | irq = &cs47l24_irq; | |
247 | ||
248 | arizona->ctrlif_error = false; | |
249 | break; | |
250 | #endif | |
dc7d4863 CK |
251 | #ifdef CONFIG_MFD_WM8997 |
252 | case WM8997: | |
253 | aod = &wm8997_aod; | |
254 | irq = &wm8997_irq; | |
255 | ||
30a2af3a | 256 | arizona->ctrlif_error = false; |
dc7d4863 CK |
257 | break; |
258 | #endif | |
6887b042 RF |
259 | #ifdef CONFIG_MFD_WM8998 |
260 | case WM8998: | |
261 | case WM1814: | |
262 | aod = &wm8998_aod; | |
263 | irq = &wm8998_irq; | |
264 | ||
265 | arizona->ctrlif_error = false; | |
266 | break; | |
267 | #endif | |
966cdc96 MB |
268 | default: |
269 | BUG_ON("Unknown Arizona class device" == NULL); | |
270 | return -EINVAL; | |
271 | } | |
272 | ||
1816cb34 MB |
273 | /* Disable all wake sources by default */ |
274 | regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0); | |
275 | ||
22c75fe7 MB |
276 | /* Read the flags from the interrupt controller if not specified */ |
277 | if (!arizona->pdata.irq_flags) { | |
278 | irq_data = irq_get_irq_data(arizona->irq); | |
279 | if (!irq_data) { | |
280 | dev_err(arizona->dev, "Invalid IRQ: %d\n", | |
281 | arizona->irq); | |
282 | return -EINVAL; | |
283 | } | |
284 | ||
285 | arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data); | |
286 | switch (arizona->pdata.irq_flags) { | |
287 | case IRQF_TRIGGER_LOW: | |
288 | case IRQF_TRIGGER_HIGH: | |
289 | case IRQF_TRIGGER_RISING: | |
290 | case IRQF_TRIGGER_FALLING: | |
291 | break; | |
292 | ||
293 | case IRQ_TYPE_NONE: | |
294 | default: | |
295 | /* Device default */ | |
296 | arizona->pdata.irq_flags = IRQF_TRIGGER_LOW; | |
297 | break; | |
298 | } | |
299 | } | |
f8a0941f MB |
300 | |
301 | if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH | | |
302 | IRQF_TRIGGER_RISING)) { | |
966cdc96 MB |
303 | ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1, |
304 | ARIZONA_IRQ_POL, 0); | |
305 | if (ret != 0) { | |
306 | dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n", | |
307 | ret); | |
308 | goto err; | |
309 | } | |
966cdc96 MB |
310 | } |
311 | ||
f8a0941f MB |
312 | flags |= arizona->pdata.irq_flags; |
313 | ||
966cdc96 MB |
314 | /* Allocate a virtual IRQ domain to distribute to the regmap domains */ |
315 | arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops, | |
316 | arizona); | |
317 | if (!arizona->virq) { | |
b7dea5dc | 318 | dev_err(arizona->dev, "Failed to add core IRQ domain\n"); |
966cdc96 MB |
319 | ret = -EINVAL; |
320 | goto err; | |
321 | } | |
322 | ||
ea1f3339 | 323 | if (aod) { |
3dfaff27 CK |
324 | virq = irq_create_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX); |
325 | if (!virq) { | |
326 | dev_err(arizona->dev, "Failed to map AOD IRQs\n"); | |
327 | ret = -EINVAL; | |
328 | goto err_domain; | |
329 | } | |
330 | ||
331 | ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT, | |
332 | 0, aod, &arizona->aod_irq_chip); | |
ea1f3339 RF |
333 | if (ret != 0) { |
334 | dev_err(arizona->dev, | |
335 | "Failed to add AOD IRQs: %d\n", ret); | |
3dfaff27 | 336 | goto err_map_aod; |
ea1f3339 | 337 | } |
966cdc96 MB |
338 | } |
339 | ||
3dfaff27 CK |
340 | virq = irq_create_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX); |
341 | if (!virq) { | |
342 | dev_err(arizona->dev, "Failed to map main IRQs\n"); | |
343 | ret = -EINVAL; | |
344 | goto err_aod; | |
345 | } | |
346 | ||
347 | ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT, | |
348 | 0, irq, &arizona->irq_chip); | |
966cdc96 | 349 | if (ret != 0) { |
d1cb4cc9 | 350 | dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret); |
3dfaff27 | 351 | goto err_map_main_irq; |
966cdc96 MB |
352 | } |
353 | ||
3092f805 MB |
354 | /* Used to emulate edge trigger and to work around broken pinmux */ |
355 | if (arizona->pdata.irq_gpio) { | |
356 | if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) { | |
357 | dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n", | |
358 | arizona->irq, arizona->pdata.irq_gpio, | |
359 | gpio_to_irq(arizona->pdata.irq_gpio)); | |
360 | arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio); | |
361 | } | |
362 | ||
363 | ret = devm_gpio_request_one(arizona->dev, | |
364 | arizona->pdata.irq_gpio, | |
365 | GPIOF_IN, "arizona IRQ"); | |
366 | if (ret != 0) { | |
367 | dev_err(arizona->dev, | |
368 | "Failed to request IRQ GPIO %d:: %d\n", | |
369 | arizona->pdata.irq_gpio, ret); | |
370 | arizona->pdata.irq_gpio = 0; | |
371 | } | |
372 | } | |
373 | ||
966cdc96 MB |
374 | ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread, |
375 | flags, "arizona", arizona); | |
376 | ||
377 | if (ret != 0) { | |
7994c664 | 378 | dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n", |
966cdc96 MB |
379 | arizona->irq, ret); |
380 | goto err_main_irq; | |
381 | } | |
382 | ||
6c006b1b | 383 | /* Make sure the boot done IRQ is unmasked for resumes */ |
003db34e CK |
384 | ret = arizona_request_irq(arizona, ARIZONA_IRQ_BOOT_DONE, "Boot done", |
385 | arizona_boot_done, arizona); | |
6c006b1b CK |
386 | if (ret != 0) { |
387 | dev_err(arizona->dev, "Failed to request boot done %d: %d\n", | |
388 | arizona->irq, ret); | |
389 | goto err_boot_done; | |
390 | } | |
391 | ||
392 | /* Handle control interface errors in the core */ | |
393 | if (arizona->ctrlif_error) { | |
003db34e CK |
394 | ret = arizona_request_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, |
395 | "Control interface error", | |
396 | arizona_ctrlif_err, arizona); | |
6c006b1b CK |
397 | if (ret != 0) { |
398 | dev_err(arizona->dev, | |
399 | "Failed to request CTRLIF_ERR %d: %d\n", | |
400 | arizona->irq, ret); | |
401 | goto err_ctrlif; | |
402 | } | |
403 | } | |
404 | ||
966cdc96 MB |
405 | return 0; |
406 | ||
966cdc96 | 407 | err_ctrlif: |
003db34e | 408 | arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona); |
966cdc96 | 409 | err_boot_done: |
6c006b1b CK |
410 | free_irq(arizona->irq, arizona); |
411 | err_main_irq: | |
1a86dcb3 CK |
412 | regmap_del_irq_chip(irq_find_mapping(arizona->virq, |
413 | ARIZONA_MAIN_IRQ_INDEX), | |
966cdc96 | 414 | arizona->irq_chip); |
3dfaff27 CK |
415 | err_map_main_irq: |
416 | irq_dispose_mapping(irq_find_mapping(arizona->virq, | |
417 | ARIZONA_MAIN_IRQ_INDEX)); | |
966cdc96 | 418 | err_aod: |
1a86dcb3 CK |
419 | regmap_del_irq_chip(irq_find_mapping(arizona->virq, |
420 | ARIZONA_AOD_IRQ_INDEX), | |
966cdc96 | 421 | arizona->aod_irq_chip); |
3dfaff27 CK |
422 | err_map_aod: |
423 | irq_dispose_mapping(irq_find_mapping(arizona->virq, | |
424 | ARIZONA_AOD_IRQ_INDEX)); | |
425 | err_domain: | |
426 | irq_domain_remove(arizona->virq); | |
966cdc96 MB |
427 | err: |
428 | return ret; | |
429 | } | |
430 | ||
431 | int arizona_irq_exit(struct arizona *arizona) | |
432 | { | |
3dfaff27 CK |
433 | unsigned int virq; |
434 | ||
30a2af3a | 435 | if (arizona->ctrlif_error) |
003db34e CK |
436 | arizona_free_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, arizona); |
437 | arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona); | |
438 | ||
3dfaff27 CK |
439 | virq = irq_find_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX); |
440 | regmap_del_irq_chip(virq, arizona->irq_chip); | |
441 | irq_dispose_mapping(virq); | |
442 | ||
443 | virq = irq_find_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX); | |
444 | regmap_del_irq_chip(virq, arizona->aod_irq_chip); | |
445 | irq_dispose_mapping(virq); | |
446 | ||
447 | irq_domain_remove(arizona->virq); | |
448 | ||
966cdc96 MB |
449 | free_irq(arizona->irq, arizona); |
450 | ||
451 | return 0; | |
452 | } |