Commit | Line | Data |
---|---|---|
f3d9478b JB |
1 | /* |
2 | * Apple Onboard Audio feature call GPIO control | |
3 | * | |
4 | * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> | |
5 | * | |
6 | * GPL v2, can be found in COPYING. | |
7 | * | |
888dcb7c | 8 | * This file contains the GPIO control routines for |
f3d9478b JB |
9 | * direct (through feature calls) access to the GPIO |
10 | * registers. | |
11 | */ | |
12 | ||
5af50730 | 13 | #include <linux/of_irq.h> |
f3d9478b | 14 | #include <linux/interrupt.h> |
5af50730 | 15 | #include <asm/pmac_feature.h> |
f3d9478b JB |
16 | #include "../aoa.h" |
17 | ||
5f17e79c | 18 | /* TODO: these are lots of global variables |
f3d9478b JB |
19 | * that aren't used on most machines... |
20 | * Move them into a dynamically allocated | |
21 | * structure and use that. | |
22 | */ | |
23 | ||
24 | /* these are the GPIO numbers (register addresses as offsets into | |
25 | * the GPIO space) */ | |
26 | static int headphone_mute_gpio; | |
5f17e79c | 27 | static int master_mute_gpio; |
f3d9478b JB |
28 | static int amp_mute_gpio; |
29 | static int lineout_mute_gpio; | |
30 | static int hw_reset_gpio; | |
31 | static int lineout_detect_gpio; | |
32 | static int headphone_detect_gpio; | |
33 | static int linein_detect_gpio; | |
34 | ||
35 | /* see the SWITCH_GPIO macro */ | |
36 | static int headphone_mute_gpio_activestate; | |
5f17e79c | 37 | static int master_mute_gpio_activestate; |
f3d9478b JB |
38 | static int amp_mute_gpio_activestate; |
39 | static int lineout_mute_gpio_activestate; | |
40 | static int hw_reset_gpio_activestate; | |
41 | static int lineout_detect_gpio_activestate; | |
42 | static int headphone_detect_gpio_activestate; | |
43 | static int linein_detect_gpio_activestate; | |
44 | ||
45 | /* node pointers that we save when getting the GPIO number | |
46 | * to get the interrupt later */ | |
47 | static struct device_node *lineout_detect_node; | |
48 | static struct device_node *linein_detect_node; | |
49 | static struct device_node *headphone_detect_node; | |
50 | ||
51 | static int lineout_detect_irq; | |
52 | static int linein_detect_irq; | |
53 | static int headphone_detect_irq; | |
54 | ||
55 | static struct device_node *get_gpio(char *name, | |
56 | char *altname, | |
57 | int *gpioptr, | |
58 | int *gpioactiveptr) | |
59 | { | |
60 | struct device_node *np, *gpio; | |
a7edd0e6 | 61 | const u32 *reg; |
abddd185 | 62 | const char *audio_gpio; |
f3d9478b JB |
63 | |
64 | *gpioptr = -1; | |
65 | ||
66 | /* check if we can get it the easy way ... */ | |
67 | np = of_find_node_by_name(NULL, name); | |
68 | if (!np) { | |
69 | /* some machines have only gpioX/extint-gpioX nodes, | |
70 | * and an audio-gpio property saying what it is ... | |
71 | * So what we have to do is enumerate all children | |
72 | * of the gpio node and check them all. */ | |
73 | gpio = of_find_node_by_name(NULL, "gpio"); | |
74 | if (!gpio) | |
75 | return NULL; | |
76 | while ((np = of_get_next_child(gpio, np))) { | |
c4f55b39 | 77 | audio_gpio = of_get_property(np, "audio-gpio", NULL); |
f3d9478b JB |
78 | if (!audio_gpio) |
79 | continue; | |
80 | if (strcmp(audio_gpio, name) == 0) | |
81 | break; | |
82 | if (altname && (strcmp(audio_gpio, altname) == 0)) | |
83 | break; | |
84 | } | |
85 | /* still not found, assume not there */ | |
86 | if (!np) | |
87 | return NULL; | |
88 | } | |
89 | ||
c4f55b39 | 90 | reg = of_get_property(np, "reg", NULL); |
f3d9478b JB |
91 | if (!reg) |
92 | return NULL; | |
93 | ||
94 | *gpioptr = *reg; | |
95 | ||
96 | /* this is a hack, usually the GPIOs 'reg' property | |
97 | * should have the offset based from the GPIO space | |
98 | * which is at 0x50, but apparently not always... */ | |
99 | if (*gpioptr < 0x50) | |
100 | *gpioptr += 0x50; | |
101 | ||
c4f55b39 | 102 | reg = of_get_property(np, "audio-gpio-active-state", NULL); |
f3d9478b JB |
103 | if (!reg) |
104 | /* Apple seems to default to 1, but | |
105 | * that doesn't seem right at least on most | |
106 | * machines. So until proven that the opposite | |
107 | * is necessary, we default to 0 | |
108 | * (which, incidentally, snd-powermac also does...) */ | |
109 | *gpioactiveptr = 0; | |
110 | else | |
111 | *gpioactiveptr = *reg; | |
112 | ||
113 | return np; | |
114 | } | |
115 | ||
116 | static void get_irq(struct device_node * np, int *irqptr) | |
117 | { | |
2566d36a JB |
118 | if (np) |
119 | *irqptr = irq_of_parse_and_map(np, 0); | |
120 | else | |
121 | *irqptr = NO_IRQ; | |
f3d9478b JB |
122 | } |
123 | ||
124 | /* 0x4 is outenable, 0x1 is out, thus 4 or 5 */ | |
125 | #define SWITCH_GPIO(name, v, on) \ | |
126 | (((v)&~1) | ((on)? \ | |
127 | (name##_gpio_activestate==0?4:5): \ | |
128 | (name##_gpio_activestate==0?5:4))) | |
129 | ||
130 | #define FTR_GPIO(name, bit) \ | |
131 | static void ftr_gpio_set_##name(struct gpio_runtime *rt, int on)\ | |
132 | { \ | |
133 | int v; \ | |
134 | \ | |
135 | if (unlikely(!rt)) return; \ | |
136 | \ | |
137 | if (name##_mute_gpio < 0) \ | |
138 | return; \ | |
139 | \ | |
140 | v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, \ | |
141 | name##_mute_gpio, \ | |
142 | 0); \ | |
143 | \ | |
144 | /* muted = !on... */ \ | |
145 | v = SWITCH_GPIO(name##_mute, v, !on); \ | |
146 | \ | |
147 | pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, \ | |
148 | name##_mute_gpio, v); \ | |
149 | \ | |
150 | rt->implementation_private &= ~(1<<bit); \ | |
151 | rt->implementation_private |= (!!on << bit); \ | |
152 | } \ | |
153 | static int ftr_gpio_get_##name(struct gpio_runtime *rt) \ | |
154 | { \ | |
155 | if (unlikely(!rt)) return 0; \ | |
156 | return (rt->implementation_private>>bit)&1; \ | |
157 | } | |
158 | ||
159 | FTR_GPIO(headphone, 0); | |
160 | FTR_GPIO(amp, 1); | |
161 | FTR_GPIO(lineout, 2); | |
5f17e79c | 162 | FTR_GPIO(master, 3); |
f3d9478b JB |
163 | |
164 | static void ftr_gpio_set_hw_reset(struct gpio_runtime *rt, int on) | |
165 | { | |
166 | int v; | |
167 | ||
168 | if (unlikely(!rt)) return; | |
169 | if (hw_reset_gpio < 0) | |
170 | return; | |
171 | ||
172 | v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, | |
173 | hw_reset_gpio, 0); | |
174 | v = SWITCH_GPIO(hw_reset, v, on); | |
175 | pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, | |
176 | hw_reset_gpio, v); | |
177 | } | |
178 | ||
5f17e79c JB |
179 | static struct gpio_methods methods; |
180 | ||
f3d9478b JB |
181 | static void ftr_gpio_all_amps_off(struct gpio_runtime *rt) |
182 | { | |
183 | int saved; | |
184 | ||
185 | if (unlikely(!rt)) return; | |
186 | saved = rt->implementation_private; | |
187 | ftr_gpio_set_headphone(rt, 0); | |
188 | ftr_gpio_set_amp(rt, 0); | |
189 | ftr_gpio_set_lineout(rt, 0); | |
5f17e79c JB |
190 | if (methods.set_master) |
191 | ftr_gpio_set_master(rt, 0); | |
f3d9478b JB |
192 | rt->implementation_private = saved; |
193 | } | |
194 | ||
195 | static void ftr_gpio_all_amps_restore(struct gpio_runtime *rt) | |
196 | { | |
197 | int s; | |
198 | ||
199 | if (unlikely(!rt)) return; | |
200 | s = rt->implementation_private; | |
201 | ftr_gpio_set_headphone(rt, (s>>0)&1); | |
202 | ftr_gpio_set_amp(rt, (s>>1)&1); | |
203 | ftr_gpio_set_lineout(rt, (s>>2)&1); | |
5f17e79c JB |
204 | if (methods.set_master) |
205 | ftr_gpio_set_master(rt, (s>>3)&1); | |
f3d9478b JB |
206 | } |
207 | ||
c4028958 | 208 | static void ftr_handle_notify(struct work_struct *work) |
f3d9478b | 209 | { |
c4028958 DH |
210 | struct gpio_notification *notif = |
211 | container_of(work, struct gpio_notification, work.work); | |
f3d9478b JB |
212 | |
213 | mutex_lock(¬if->mutex); | |
214 | if (notif->notify) | |
215 | notif->notify(notif->data); | |
216 | mutex_unlock(¬if->mutex); | |
217 | } | |
218 | ||
bd66f3bb JB |
219 | static void gpio_enable_dual_edge(int gpio) |
220 | { | |
221 | int v; | |
222 | ||
223 | if (gpio == -1) | |
224 | return; | |
225 | v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0); | |
226 | v |= 0x80; /* enable dual edge */ | |
227 | pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, gpio, v); | |
228 | } | |
229 | ||
f3d9478b JB |
230 | static void ftr_gpio_init(struct gpio_runtime *rt) |
231 | { | |
232 | get_gpio("headphone-mute", NULL, | |
233 | &headphone_mute_gpio, | |
234 | &headphone_mute_gpio_activestate); | |
235 | get_gpio("amp-mute", NULL, | |
236 | &_mute_gpio, | |
237 | &_mute_gpio_activestate); | |
238 | get_gpio("lineout-mute", NULL, | |
239 | &lineout_mute_gpio, | |
240 | &lineout_mute_gpio_activestate); | |
241 | get_gpio("hw-reset", "audio-hw-reset", | |
242 | &hw_reset_gpio, | |
243 | &hw_reset_gpio_activestate); | |
5f17e79c JB |
244 | if (get_gpio("master-mute", NULL, |
245 | &master_mute_gpio, | |
246 | &master_mute_gpio_activestate)) { | |
247 | methods.set_master = ftr_gpio_set_master; | |
248 | methods.get_master = ftr_gpio_get_master; | |
249 | } | |
f3d9478b JB |
250 | |
251 | headphone_detect_node = get_gpio("headphone-detect", NULL, | |
252 | &headphone_detect_gpio, | |
253 | &headphone_detect_gpio_activestate); | |
254 | /* go Apple, and thanks for giving these different names | |
255 | * across the board... */ | |
256 | lineout_detect_node = get_gpio("lineout-detect", "line-output-detect", | |
257 | &lineout_detect_gpio, | |
258 | &lineout_detect_gpio_activestate); | |
259 | linein_detect_node = get_gpio("linein-detect", "line-input-detect", | |
260 | &linein_detect_gpio, | |
261 | &linein_detect_gpio_activestate); | |
262 | ||
bd66f3bb JB |
263 | gpio_enable_dual_edge(headphone_detect_gpio); |
264 | gpio_enable_dual_edge(lineout_detect_gpio); | |
265 | gpio_enable_dual_edge(linein_detect_gpio); | |
266 | ||
f3d9478b JB |
267 | get_irq(headphone_detect_node, &headphone_detect_irq); |
268 | get_irq(lineout_detect_node, &lineout_detect_irq); | |
269 | get_irq(linein_detect_node, &linein_detect_irq); | |
270 | ||
271 | ftr_gpio_all_amps_off(rt); | |
272 | rt->implementation_private = 0; | |
c4028958 DH |
273 | INIT_DELAYED_WORK(&rt->headphone_notify.work, ftr_handle_notify); |
274 | INIT_DELAYED_WORK(&rt->line_in_notify.work, ftr_handle_notify); | |
275 | INIT_DELAYED_WORK(&rt->line_out_notify.work, ftr_handle_notify); | |
f3d9478b JB |
276 | mutex_init(&rt->headphone_notify.mutex); |
277 | mutex_init(&rt->line_in_notify.mutex); | |
278 | mutex_init(&rt->line_out_notify.mutex); | |
279 | } | |
280 | ||
281 | static void ftr_gpio_exit(struct gpio_runtime *rt) | |
282 | { | |
283 | ftr_gpio_all_amps_off(rt); | |
284 | rt->implementation_private = 0; | |
285 | if (rt->headphone_notify.notify) | |
286 | free_irq(headphone_detect_irq, &rt->headphone_notify); | |
287 | if (rt->line_in_notify.gpio_private) | |
288 | free_irq(linein_detect_irq, &rt->line_in_notify); | |
289 | if (rt->line_out_notify.gpio_private) | |
290 | free_irq(lineout_detect_irq, &rt->line_out_notify); | |
5b84ba26 TH |
291 | cancel_delayed_work_sync(&rt->headphone_notify.work); |
292 | cancel_delayed_work_sync(&rt->line_in_notify.work); | |
293 | cancel_delayed_work_sync(&rt->line_out_notify.work); | |
f3d9478b JB |
294 | mutex_destroy(&rt->headphone_notify.mutex); |
295 | mutex_destroy(&rt->line_in_notify.mutex); | |
296 | mutex_destroy(&rt->line_out_notify.mutex); | |
297 | } | |
298 | ||
7d12e780 | 299 | static irqreturn_t ftr_handle_notify_irq(int xx, void *data) |
f3d9478b JB |
300 | { |
301 | struct gpio_notification *notif = data; | |
302 | ||
c4028958 | 303 | schedule_delayed_work(¬if->work, 0); |
f3d9478b JB |
304 | |
305 | return IRQ_HANDLED; | |
306 | } | |
307 | ||
308 | static int ftr_set_notify(struct gpio_runtime *rt, | |
309 | enum notify_type type, | |
310 | notify_func_t notify, | |
311 | void *data) | |
312 | { | |
313 | struct gpio_notification *notif; | |
314 | notify_func_t old; | |
315 | int irq; | |
316 | char *name; | |
317 | int err = -EBUSY; | |
318 | ||
319 | switch (type) { | |
320 | case AOA_NOTIFY_HEADPHONE: | |
321 | notif = &rt->headphone_notify; | |
322 | name = "headphone-detect"; | |
323 | irq = headphone_detect_irq; | |
324 | break; | |
325 | case AOA_NOTIFY_LINE_IN: | |
326 | notif = &rt->line_in_notify; | |
327 | name = "linein-detect"; | |
328 | irq = linein_detect_irq; | |
329 | break; | |
330 | case AOA_NOTIFY_LINE_OUT: | |
331 | notif = &rt->line_out_notify; | |
332 | name = "lineout-detect"; | |
333 | irq = lineout_detect_irq; | |
334 | break; | |
335 | default: | |
336 | return -EINVAL; | |
337 | } | |
338 | ||
2566d36a | 339 | if (irq == NO_IRQ) |
f3d9478b JB |
340 | return -ENODEV; |
341 | ||
342 | mutex_lock(¬if->mutex); | |
343 | ||
344 | old = notif->notify; | |
345 | ||
346 | if (!old && !notify) { | |
347 | err = 0; | |
348 | goto out_unlock; | |
349 | } | |
350 | ||
351 | if (old && notify) { | |
352 | if (old == notify && notif->data == data) | |
353 | err = 0; | |
354 | goto out_unlock; | |
355 | } | |
356 | ||
357 | if (old && !notify) | |
358 | free_irq(irq, notif); | |
359 | ||
360 | if (!old && notify) { | |
361 | err = request_irq(irq, ftr_handle_notify_irq, 0, name, notif); | |
362 | if (err) | |
363 | goto out_unlock; | |
364 | } | |
365 | ||
366 | notif->notify = notify; | |
367 | notif->data = data; | |
368 | ||
369 | err = 0; | |
370 | out_unlock: | |
371 | mutex_unlock(¬if->mutex); | |
372 | return err; | |
373 | } | |
374 | ||
375 | static int ftr_get_detect(struct gpio_runtime *rt, | |
376 | enum notify_type type) | |
377 | { | |
378 | int gpio, ret, active; | |
379 | ||
380 | switch (type) { | |
381 | case AOA_NOTIFY_HEADPHONE: | |
382 | gpio = headphone_detect_gpio; | |
383 | active = headphone_detect_gpio_activestate; | |
384 | break; | |
385 | case AOA_NOTIFY_LINE_IN: | |
386 | gpio = linein_detect_gpio; | |
387 | active = linein_detect_gpio_activestate; | |
388 | break; | |
389 | case AOA_NOTIFY_LINE_OUT: | |
390 | gpio = lineout_detect_gpio; | |
391 | active = lineout_detect_gpio_activestate; | |
392 | break; | |
393 | default: | |
394 | return -EINVAL; | |
395 | } | |
396 | ||
397 | if (gpio == -1) | |
398 | return -ENODEV; | |
399 | ||
400 | ret = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0); | |
401 | if (ret < 0) | |
402 | return ret; | |
403 | return ((ret >> 1) & 1) == active; | |
404 | } | |
405 | ||
406 | static struct gpio_methods methods = { | |
407 | .init = ftr_gpio_init, | |
408 | .exit = ftr_gpio_exit, | |
409 | .all_amps_off = ftr_gpio_all_amps_off, | |
410 | .all_amps_restore = ftr_gpio_all_amps_restore, | |
411 | .set_headphone = ftr_gpio_set_headphone, | |
412 | .set_speakers = ftr_gpio_set_amp, | |
413 | .set_lineout = ftr_gpio_set_lineout, | |
414 | .set_hw_reset = ftr_gpio_set_hw_reset, | |
415 | .get_headphone = ftr_gpio_get_headphone, | |
416 | .get_speakers = ftr_gpio_get_amp, | |
417 | .get_lineout = ftr_gpio_get_lineout, | |
418 | .set_notify = ftr_set_notify, | |
419 | .get_detect = ftr_get_detect, | |
420 | }; | |
421 | ||
422 | struct gpio_methods *ftr_gpio_methods = &methods; | |
423 | EXPORT_SYMBOL_GPL(ftr_gpio_methods); |