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