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 | ||
ea1f3339 RF |
112 | if (arizona->aod_irq_chip) |
113 | handle_nested_irq(irq_find_mapping(arizona->virq, 0)); | |
3092f805 MB |
114 | |
115 | /* | |
116 | * Check if one of the main interrupts is asserted and only | |
117 | * check that domain if it is. | |
118 | */ | |
119 | ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS, | |
120 | &val); | |
121 | if (ret == 0 && val & ARIZONA_IRQ1_STS) { | |
122 | handle_nested_irq(irq_find_mapping(arizona->virq, 1)); | |
123 | } else if (ret != 0) { | |
124 | dev_err(arizona->dev, | |
125 | "Failed to read main IRQ status: %d\n", ret); | |
126 | } | |
3080de4e | 127 | |
3092f805 MB |
128 | /* |
129 | * Poll the IRQ pin status to see if we're really done | |
130 | * if the interrupt controller can't do it for us. | |
131 | */ | |
132 | if (!arizona->pdata.irq_gpio) { | |
133 | break; | |
134 | } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING && | |
135 | gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { | |
136 | poll = true; | |
137 | } else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING && | |
138 | !gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { | |
139 | poll = true; | |
140 | } | |
141 | } while (poll); | |
966cdc96 MB |
142 | |
143 | pm_runtime_mark_last_busy(arizona->dev); | |
144 | pm_runtime_put_autosuspend(arizona->dev); | |
145 | ||
146 | return IRQ_HANDLED; | |
147 | } | |
148 | ||
149 | static void arizona_irq_enable(struct irq_data *data) | |
150 | { | |
151 | } | |
152 | ||
153 | static void arizona_irq_disable(struct irq_data *data) | |
154 | { | |
155 | } | |
156 | ||
c38715fe CK |
157 | static int arizona_irq_set_wake(struct irq_data *data, unsigned int on) |
158 | { | |
159 | struct arizona *arizona = irq_data_get_irq_chip_data(data); | |
160 | ||
161 | return irq_set_irq_wake(arizona->irq, on); | |
162 | } | |
163 | ||
966cdc96 MB |
164 | static struct irq_chip arizona_irq_chip = { |
165 | .name = "arizona", | |
166 | .irq_disable = arizona_irq_disable, | |
167 | .irq_enable = arizona_irq_enable, | |
c38715fe | 168 | .irq_set_wake = arizona_irq_set_wake, |
966cdc96 MB |
169 | }; |
170 | ||
171 | static int arizona_irq_map(struct irq_domain *h, unsigned int virq, | |
172 | irq_hw_number_t hw) | |
173 | { | |
0a464dfd | 174 | struct arizona *data = h->host_data; |
966cdc96 MB |
175 | |
176 | irq_set_chip_data(virq, data); | |
cfeb35da | 177 | irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq); |
966cdc96 | 178 | irq_set_nested_thread(virq, 1); |
966cdc96 | 179 | irq_set_noprobe(virq); |
966cdc96 MB |
180 | |
181 | return 0; | |
182 | } | |
183 | ||
7ce7b26f | 184 | static const struct irq_domain_ops arizona_domain_ops = { |
966cdc96 MB |
185 | .map = arizona_irq_map, |
186 | .xlate = irq_domain_xlate_twocell, | |
187 | }; | |
188 | ||
189 | int arizona_irq_init(struct arizona *arizona) | |
190 | { | |
191 | int flags = IRQF_ONESHOT; | |
192 | int ret, i; | |
193 | const struct regmap_irq_chip *aod, *irq; | |
22c75fe7 | 194 | struct irq_data *irq_data; |
966cdc96 | 195 | |
30a2af3a CK |
196 | arizona->ctrlif_error = true; |
197 | ||
966cdc96 | 198 | switch (arizona->type) { |
863df8d5 | 199 | #ifdef CONFIG_MFD_WM5102 |
966cdc96 MB |
200 | case WM5102: |
201 | aod = &wm5102_aod; | |
202 | irq = &wm5102_irq; | |
92d80139 | 203 | |
30a2af3a | 204 | arizona->ctrlif_error = false; |
966cdc96 | 205 | break; |
e102befe MB |
206 | #endif |
207 | #ifdef CONFIG_MFD_WM5110 | |
208 | case WM5110: | |
e5d4ef0d | 209 | case WM8280: |
e102befe | 210 | aod = &wm5110_aod; |
3215501f CK |
211 | |
212 | switch (arizona->rev) { | |
213 | case 0 ... 2: | |
214 | irq = &wm5110_irq; | |
215 | break; | |
216 | default: | |
217 | irq = &wm5110_revd_irq; | |
218 | break; | |
219 | } | |
92d80139 | 220 | |
30a2af3a | 221 | arizona->ctrlif_error = false; |
e102befe | 222 | break; |
863df8d5 | 223 | #endif |
ea1f3339 RF |
224 | #ifdef CONFIG_MFD_CS47L24 |
225 | case WM1831: | |
226 | case CS47L24: | |
227 | aod = NULL; | |
228 | irq = &cs47l24_irq; | |
229 | ||
230 | arizona->ctrlif_error = false; | |
231 | break; | |
232 | #endif | |
dc7d4863 CK |
233 | #ifdef CONFIG_MFD_WM8997 |
234 | case WM8997: | |
235 | aod = &wm8997_aod; | |
236 | irq = &wm8997_irq; | |
237 | ||
30a2af3a | 238 | arizona->ctrlif_error = false; |
dc7d4863 CK |
239 | break; |
240 | #endif | |
6887b042 RF |
241 | #ifdef CONFIG_MFD_WM8998 |
242 | case WM8998: | |
243 | case WM1814: | |
244 | aod = &wm8998_aod; | |
245 | irq = &wm8998_irq; | |
246 | ||
247 | arizona->ctrlif_error = false; | |
248 | break; | |
249 | #endif | |
966cdc96 MB |
250 | default: |
251 | BUG_ON("Unknown Arizona class device" == NULL); | |
252 | return -EINVAL; | |
253 | } | |
254 | ||
1816cb34 MB |
255 | /* Disable all wake sources by default */ |
256 | regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0); | |
257 | ||
22c75fe7 MB |
258 | /* Read the flags from the interrupt controller if not specified */ |
259 | if (!arizona->pdata.irq_flags) { | |
260 | irq_data = irq_get_irq_data(arizona->irq); | |
261 | if (!irq_data) { | |
262 | dev_err(arizona->dev, "Invalid IRQ: %d\n", | |
263 | arizona->irq); | |
264 | return -EINVAL; | |
265 | } | |
266 | ||
267 | arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data); | |
268 | switch (arizona->pdata.irq_flags) { | |
269 | case IRQF_TRIGGER_LOW: | |
270 | case IRQF_TRIGGER_HIGH: | |
271 | case IRQF_TRIGGER_RISING: | |
272 | case IRQF_TRIGGER_FALLING: | |
273 | break; | |
274 | ||
275 | case IRQ_TYPE_NONE: | |
276 | default: | |
277 | /* Device default */ | |
278 | arizona->pdata.irq_flags = IRQF_TRIGGER_LOW; | |
279 | break; | |
280 | } | |
281 | } | |
f8a0941f MB |
282 | |
283 | if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH | | |
284 | IRQF_TRIGGER_RISING)) { | |
966cdc96 MB |
285 | ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1, |
286 | ARIZONA_IRQ_POL, 0); | |
287 | if (ret != 0) { | |
288 | dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n", | |
289 | ret); | |
290 | goto err; | |
291 | } | |
966cdc96 MB |
292 | } |
293 | ||
f8a0941f MB |
294 | flags |= arizona->pdata.irq_flags; |
295 | ||
966cdc96 MB |
296 | /* Allocate a virtual IRQ domain to distribute to the regmap domains */ |
297 | arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops, | |
298 | arizona); | |
299 | if (!arizona->virq) { | |
b7dea5dc | 300 | dev_err(arizona->dev, "Failed to add core IRQ domain\n"); |
966cdc96 MB |
301 | ret = -EINVAL; |
302 | goto err; | |
303 | } | |
304 | ||
ea1f3339 RF |
305 | if (aod) { |
306 | ret = regmap_add_irq_chip(arizona->regmap, | |
307 | irq_create_mapping(arizona->virq, 0), | |
308 | IRQF_ONESHOT, 0, aod, | |
309 | &arizona->aod_irq_chip); | |
310 | if (ret != 0) { | |
311 | dev_err(arizona->dev, | |
312 | "Failed to add AOD IRQs: %d\n", ret); | |
6c006b1b | 313 | goto err; |
ea1f3339 | 314 | } |
966cdc96 MB |
315 | } |
316 | ||
317 | ret = regmap_add_irq_chip(arizona->regmap, | |
318 | irq_create_mapping(arizona->virq, 1), | |
2a3377ee | 319 | IRQF_ONESHOT, 0, irq, |
966cdc96 MB |
320 | &arizona->irq_chip); |
321 | if (ret != 0) { | |
d1cb4cc9 | 322 | dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret); |
966cdc96 MB |
323 | goto err_aod; |
324 | } | |
325 | ||
3092f805 MB |
326 | /* Used to emulate edge trigger and to work around broken pinmux */ |
327 | if (arizona->pdata.irq_gpio) { | |
328 | if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) { | |
329 | dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n", | |
330 | arizona->irq, arizona->pdata.irq_gpio, | |
331 | gpio_to_irq(arizona->pdata.irq_gpio)); | |
332 | arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio); | |
333 | } | |
334 | ||
335 | ret = devm_gpio_request_one(arizona->dev, | |
336 | arizona->pdata.irq_gpio, | |
337 | GPIOF_IN, "arizona IRQ"); | |
338 | if (ret != 0) { | |
339 | dev_err(arizona->dev, | |
340 | "Failed to request IRQ GPIO %d:: %d\n", | |
341 | arizona->pdata.irq_gpio, ret); | |
342 | arizona->pdata.irq_gpio = 0; | |
343 | } | |
344 | } | |
345 | ||
966cdc96 MB |
346 | ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread, |
347 | flags, "arizona", arizona); | |
348 | ||
349 | if (ret != 0) { | |
7994c664 | 350 | dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n", |
966cdc96 MB |
351 | arizona->irq, ret); |
352 | goto err_main_irq; | |
353 | } | |
354 | ||
6c006b1b CK |
355 | /* Make sure the boot done IRQ is unmasked for resumes */ |
356 | i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE); | |
357 | ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT, | |
358 | "Boot done", arizona); | |
359 | if (ret != 0) { | |
360 | dev_err(arizona->dev, "Failed to request boot done %d: %d\n", | |
361 | arizona->irq, ret); | |
362 | goto err_boot_done; | |
363 | } | |
364 | ||
365 | /* Handle control interface errors in the core */ | |
366 | if (arizona->ctrlif_error) { | |
367 | i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR); | |
368 | ret = request_threaded_irq(i, NULL, arizona_ctrlif_err, | |
369 | IRQF_ONESHOT, | |
370 | "Control interface error", arizona); | |
371 | if (ret != 0) { | |
372 | dev_err(arizona->dev, | |
373 | "Failed to request CTRLIF_ERR %d: %d\n", | |
374 | arizona->irq, ret); | |
375 | goto err_ctrlif; | |
376 | } | |
377 | } | |
378 | ||
966cdc96 MB |
379 | return 0; |
380 | ||
966cdc96 MB |
381 | err_ctrlif: |
382 | free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona); | |
383 | err_boot_done: | |
6c006b1b CK |
384 | free_irq(arizona->irq, arizona); |
385 | err_main_irq: | |
966cdc96 MB |
386 | regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1), |
387 | arizona->irq_chip); | |
388 | err_aod: | |
389 | regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0), | |
390 | arizona->aod_irq_chip); | |
966cdc96 MB |
391 | err: |
392 | return ret; | |
393 | } | |
394 | ||
395 | int arizona_irq_exit(struct arizona *arizona) | |
396 | { | |
30a2af3a CK |
397 | if (arizona->ctrlif_error) |
398 | free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), | |
399 | arizona); | |
966cdc96 MB |
400 | free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona); |
401 | regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1), | |
402 | arizona->irq_chip); | |
403 | regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0), | |
404 | arizona->aod_irq_chip); | |
405 | free_irq(arizona->irq, arizona); | |
406 | ||
407 | return 0; | |
408 | } |