Commit | Line | Data |
---|---|---|
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 | ||
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 MB |
102 | |
103 | ret = pm_runtime_get_sync(arizona->dev); | |
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 CK |
183 | static struct lock_class_key arizona_irq_lock_class; |
184 | ||
966cdc96 MB |
185 | static int arizona_irq_map(struct irq_domain *h, unsigned int virq, |
186 | irq_hw_number_t hw) | |
187 | { | |
0a464dfd | 188 | struct arizona *data = h->host_data; |
966cdc96 MB |
189 | |
190 | irq_set_chip_data(virq, data); | |
dedf24a2 | 191 | irq_set_lockdep_class(virq, &arizona_irq_lock_class); |
cfeb35da | 192 | irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq); |
966cdc96 | 193 | irq_set_nested_thread(virq, 1); |
966cdc96 | 194 | irq_set_noprobe(virq); |
966cdc96 MB |
195 | |
196 | return 0; | |
197 | } | |
198 | ||
7ce7b26f | 199 | static const struct irq_domain_ops arizona_domain_ops = { |
966cdc96 MB |
200 | .map = arizona_irq_map, |
201 | .xlate = irq_domain_xlate_twocell, | |
202 | }; | |
203 | ||
204 | int arizona_irq_init(struct arizona *arizona) | |
205 | { | |
206 | int flags = IRQF_ONESHOT; | |
207 | int ret, i; | |
208 | const struct regmap_irq_chip *aod, *irq; | |
22c75fe7 | 209 | struct irq_data *irq_data; |
966cdc96 | 210 | |
30a2af3a CK |
211 | arizona->ctrlif_error = true; |
212 | ||
966cdc96 | 213 | switch (arizona->type) { |
863df8d5 | 214 | #ifdef CONFIG_MFD_WM5102 |
966cdc96 MB |
215 | case WM5102: |
216 | aod = &wm5102_aod; | |
217 | irq = &wm5102_irq; | |
92d80139 | 218 | |
30a2af3a | 219 | arizona->ctrlif_error = false; |
966cdc96 | 220 | break; |
e102befe MB |
221 | #endif |
222 | #ifdef CONFIG_MFD_WM5110 | |
223 | case WM5110: | |
e5d4ef0d | 224 | case WM8280: |
e102befe | 225 | aod = &wm5110_aod; |
3215501f CK |
226 | |
227 | switch (arizona->rev) { | |
228 | case 0 ... 2: | |
229 | irq = &wm5110_irq; | |
230 | break; | |
231 | default: | |
232 | irq = &wm5110_revd_irq; | |
233 | break; | |
234 | } | |
92d80139 | 235 | |
30a2af3a | 236 | arizona->ctrlif_error = false; |
e102befe | 237 | break; |
863df8d5 | 238 | #endif |
ea1f3339 RF |
239 | #ifdef CONFIG_MFD_CS47L24 |
240 | case WM1831: | |
241 | case CS47L24: | |
242 | aod = NULL; | |
243 | irq = &cs47l24_irq; | |
244 | ||
245 | arizona->ctrlif_error = false; | |
246 | break; | |
247 | #endif | |
dc7d4863 CK |
248 | #ifdef CONFIG_MFD_WM8997 |
249 | case WM8997: | |
250 | aod = &wm8997_aod; | |
251 | irq = &wm8997_irq; | |
252 | ||
30a2af3a | 253 | arizona->ctrlif_error = false; |
dc7d4863 CK |
254 | break; |
255 | #endif | |
6887b042 RF |
256 | #ifdef CONFIG_MFD_WM8998 |
257 | case WM8998: | |
258 | case WM1814: | |
259 | aod = &wm8998_aod; | |
260 | irq = &wm8998_irq; | |
261 | ||
262 | arizona->ctrlif_error = false; | |
263 | break; | |
264 | #endif | |
966cdc96 MB |
265 | default: |
266 | BUG_ON("Unknown Arizona class device" == NULL); | |
267 | return -EINVAL; | |
268 | } | |
269 | ||
1816cb34 MB |
270 | /* Disable all wake sources by default */ |
271 | regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0); | |
272 | ||
22c75fe7 MB |
273 | /* Read the flags from the interrupt controller if not specified */ |
274 | if (!arizona->pdata.irq_flags) { | |
275 | irq_data = irq_get_irq_data(arizona->irq); | |
276 | if (!irq_data) { | |
277 | dev_err(arizona->dev, "Invalid IRQ: %d\n", | |
278 | arizona->irq); | |
279 | return -EINVAL; | |
280 | } | |
281 | ||
282 | arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data); | |
283 | switch (arizona->pdata.irq_flags) { | |
284 | case IRQF_TRIGGER_LOW: | |
285 | case IRQF_TRIGGER_HIGH: | |
286 | case IRQF_TRIGGER_RISING: | |
287 | case IRQF_TRIGGER_FALLING: | |
288 | break; | |
289 | ||
290 | case IRQ_TYPE_NONE: | |
291 | default: | |
292 | /* Device default */ | |
293 | arizona->pdata.irq_flags = IRQF_TRIGGER_LOW; | |
294 | break; | |
295 | } | |
296 | } | |
f8a0941f MB |
297 | |
298 | if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH | | |
299 | IRQF_TRIGGER_RISING)) { | |
966cdc96 MB |
300 | ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1, |
301 | ARIZONA_IRQ_POL, 0); | |
302 | if (ret != 0) { | |
303 | dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n", | |
304 | ret); | |
305 | goto err; | |
306 | } | |
966cdc96 MB |
307 | } |
308 | ||
f8a0941f MB |
309 | flags |= arizona->pdata.irq_flags; |
310 | ||
966cdc96 MB |
311 | /* Allocate a virtual IRQ domain to distribute to the regmap domains */ |
312 | arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops, | |
313 | arizona); | |
314 | if (!arizona->virq) { | |
b7dea5dc | 315 | dev_err(arizona->dev, "Failed to add core IRQ domain\n"); |
966cdc96 MB |
316 | ret = -EINVAL; |
317 | goto err; | |
318 | } | |
319 | ||
ea1f3339 RF |
320 | if (aod) { |
321 | ret = regmap_add_irq_chip(arizona->regmap, | |
322 | irq_create_mapping(arizona->virq, 0), | |
323 | IRQF_ONESHOT, 0, aod, | |
324 | &arizona->aod_irq_chip); | |
325 | if (ret != 0) { | |
326 | dev_err(arizona->dev, | |
327 | "Failed to add AOD IRQs: %d\n", ret); | |
6c006b1b | 328 | goto err; |
ea1f3339 | 329 | } |
966cdc96 MB |
330 | } |
331 | ||
332 | ret = regmap_add_irq_chip(arizona->regmap, | |
333 | irq_create_mapping(arizona->virq, 1), | |
2a3377ee | 334 | IRQF_ONESHOT, 0, irq, |
966cdc96 MB |
335 | &arizona->irq_chip); |
336 | if (ret != 0) { | |
d1cb4cc9 | 337 | dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret); |
966cdc96 MB |
338 | goto err_aod; |
339 | } | |
340 | ||
3092f805 MB |
341 | /* Used to emulate edge trigger and to work around broken pinmux */ |
342 | if (arizona->pdata.irq_gpio) { | |
343 | if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) { | |
344 | dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n", | |
345 | arizona->irq, arizona->pdata.irq_gpio, | |
346 | gpio_to_irq(arizona->pdata.irq_gpio)); | |
347 | arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio); | |
348 | } | |
349 | ||
350 | ret = devm_gpio_request_one(arizona->dev, | |
351 | arizona->pdata.irq_gpio, | |
352 | GPIOF_IN, "arizona IRQ"); | |
353 | if (ret != 0) { | |
354 | dev_err(arizona->dev, | |
355 | "Failed to request IRQ GPIO %d:: %d\n", | |
356 | arizona->pdata.irq_gpio, ret); | |
357 | arizona->pdata.irq_gpio = 0; | |
358 | } | |
359 | } | |
360 | ||
966cdc96 MB |
361 | ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread, |
362 | flags, "arizona", arizona); | |
363 | ||
364 | if (ret != 0) { | |
7994c664 | 365 | dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n", |
966cdc96 MB |
366 | arizona->irq, ret); |
367 | goto err_main_irq; | |
368 | } | |
369 | ||
6c006b1b CK |
370 | /* Make sure the boot done IRQ is unmasked for resumes */ |
371 | i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE); | |
372 | ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT, | |
373 | "Boot done", arizona); | |
374 | if (ret != 0) { | |
375 | dev_err(arizona->dev, "Failed to request boot done %d: %d\n", | |
376 | arizona->irq, ret); | |
377 | goto err_boot_done; | |
378 | } | |
379 | ||
380 | /* Handle control interface errors in the core */ | |
381 | if (arizona->ctrlif_error) { | |
382 | i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR); | |
383 | ret = request_threaded_irq(i, NULL, arizona_ctrlif_err, | |
384 | IRQF_ONESHOT, | |
385 | "Control interface error", arizona); | |
386 | if (ret != 0) { | |
387 | dev_err(arizona->dev, | |
388 | "Failed to request CTRLIF_ERR %d: %d\n", | |
389 | arizona->irq, ret); | |
390 | goto err_ctrlif; | |
391 | } | |
392 | } | |
393 | ||
966cdc96 MB |
394 | return 0; |
395 | ||
966cdc96 MB |
396 | err_ctrlif: |
397 | free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona); | |
398 | err_boot_done: | |
6c006b1b CK |
399 | free_irq(arizona->irq, arizona); |
400 | err_main_irq: | |
d34bffb5 | 401 | regmap_del_irq_chip(irq_find_mapping(arizona->virq, 1), |
966cdc96 MB |
402 | arizona->irq_chip); |
403 | err_aod: | |
d34bffb5 | 404 | regmap_del_irq_chip(irq_find_mapping(arizona->virq, 0), |
966cdc96 | 405 | arizona->aod_irq_chip); |
966cdc96 MB |
406 | err: |
407 | return ret; | |
408 | } | |
409 | ||
410 | int arizona_irq_exit(struct arizona *arizona) | |
411 | { | |
30a2af3a CK |
412 | if (arizona->ctrlif_error) |
413 | free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), | |
414 | arizona); | |
966cdc96 | 415 | free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona); |
d34bffb5 | 416 | regmap_del_irq_chip(irq_find_mapping(arizona->virq, 1), |
966cdc96 | 417 | arizona->irq_chip); |
d34bffb5 | 418 | regmap_del_irq_chip(irq_find_mapping(arizona->virq, 0), |
966cdc96 MB |
419 | arizona->aod_irq_chip); |
420 | free_irq(arizona->irq, arizona); | |
421 | ||
422 | return 0; | |
423 | } |