Commit | Line | Data |
---|---|---|
1f7b49d0 BH |
1 | /* |
2 | * Mac Mini "toonie" mixer control | |
3 | * | |
4 | * Copyright (c) 2005 by Benjamin Herrenschmidt <benh@kernel.crashing.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | #include <sound/driver.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/i2c.h> | |
1f7b49d0 BH |
25 | #include <linux/kmod.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <sound/core.h> | |
29 | #include <asm/io.h> | |
30 | #include <asm/irq.h> | |
31 | #include <asm/machdep.h> | |
32 | #include <asm/pmac_feature.h> | |
33 | #include "pmac.h" | |
34 | ||
35 | #undef DEBUG | |
36 | ||
37 | #ifdef DEBUG | |
38 | #define DBG(fmt...) printk(fmt) | |
39 | #else | |
40 | #define DBG(fmt...) | |
41 | #endif | |
42 | ||
43 | struct pmac_gpio { | |
44 | unsigned int addr; | |
45 | u8 active_val; | |
46 | u8 inactive_val; | |
47 | u8 active_state; | |
48 | }; | |
49 | ||
50 | struct pmac_toonie | |
51 | { | |
52 | struct pmac_gpio hp_detect_gpio; | |
53 | struct pmac_gpio hp_mute_gpio; | |
54 | struct pmac_gpio amp_mute_gpio; | |
55 | int hp_detect_irq; | |
56 | int auto_mute_notify; | |
57 | struct work_struct detect_work; | |
58 | }; | |
59 | ||
60 | ||
61 | /* | |
62 | * gpio access | |
63 | */ | |
64 | #define do_gpio_write(gp, val) \ | |
65 | pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, (gp)->addr, val) | |
66 | #define do_gpio_read(gp) \ | |
67 | pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, (gp)->addr, 0) | |
68 | #define tumbler_gpio_free(gp) /* NOP */ | |
69 | ||
70 | static void write_audio_gpio(struct pmac_gpio *gp, int active) | |
71 | { | |
72 | if (! gp->addr) | |
73 | return; | |
74 | active = active ? gp->active_val : gp->inactive_val; | |
75 | do_gpio_write(gp, active); | |
76 | DBG("(I) gpio %x write %d\n", gp->addr, active); | |
77 | } | |
78 | ||
79 | static int check_audio_gpio(struct pmac_gpio *gp) | |
80 | { | |
81 | int ret; | |
82 | ||
83 | if (! gp->addr) | |
84 | return 0; | |
85 | ||
86 | ret = do_gpio_read(gp); | |
87 | ||
88 | return (ret & 0xd) == (gp->active_val & 0xd); | |
89 | } | |
90 | ||
91 | static int read_audio_gpio(struct pmac_gpio *gp) | |
92 | { | |
93 | int ret; | |
94 | if (! gp->addr) | |
95 | return 0; | |
96 | ret = ((do_gpio_read(gp) & 0x02) !=0); | |
97 | return ret == gp->active_state; | |
98 | } | |
99 | ||
100 | ||
101 | enum { TOONIE_MUTE_HP, TOONIE_MUTE_AMP }; | |
102 | ||
65b29f50 TI |
103 | static int toonie_get_mute_switch(struct snd_kcontrol *kcontrol, |
104 | struct snd_ctl_elem_value *ucontrol) | |
1f7b49d0 | 105 | { |
65b29f50 | 106 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
1f7b49d0 BH |
107 | struct pmac_toonie *mix = chip->mixer_data; |
108 | struct pmac_gpio *gp; | |
109 | ||
110 | if (mix == NULL) | |
111 | return -ENODEV; | |
112 | switch(kcontrol->private_value) { | |
113 | case TOONIE_MUTE_HP: | |
114 | gp = &mix->hp_mute_gpio; | |
115 | break; | |
116 | case TOONIE_MUTE_AMP: | |
117 | gp = &mix->amp_mute_gpio; | |
118 | break; | |
119 | default: | |
53b3531b | 120 | return -EINVAL; |
1f7b49d0 BH |
121 | } |
122 | ucontrol->value.integer.value[0] = !check_audio_gpio(gp); | |
123 | return 0; | |
124 | } | |
125 | ||
65b29f50 TI |
126 | static int toonie_put_mute_switch(struct snd_kcontrol *kcontrol, |
127 | struct snd_ctl_elem_value *ucontrol) | |
1f7b49d0 | 128 | { |
65b29f50 | 129 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
1f7b49d0 BH |
130 | struct pmac_toonie *mix = chip->mixer_data; |
131 | struct pmac_gpio *gp; | |
132 | int val; | |
133 | ||
134 | if (chip->update_automute && chip->auto_mute) | |
135 | return 0; /* don't touch in the auto-mute mode */ | |
136 | ||
137 | if (mix == NULL) | |
138 | return -ENODEV; | |
139 | ||
140 | switch(kcontrol->private_value) { | |
141 | case TOONIE_MUTE_HP: | |
142 | gp = &mix->hp_mute_gpio; | |
143 | break; | |
144 | case TOONIE_MUTE_AMP: | |
145 | gp = &mix->amp_mute_gpio; | |
146 | break; | |
147 | default: | |
53b3531b | 148 | return -EINVAL; |
1f7b49d0 BH |
149 | } |
150 | val = ! check_audio_gpio(gp); | |
151 | if (val != ucontrol->value.integer.value[0]) { | |
152 | write_audio_gpio(gp, ! ucontrol->value.integer.value[0]); | |
153 | return 1; | |
154 | } | |
155 | return 0; | |
156 | } | |
157 | ||
65b29f50 | 158 | static struct snd_kcontrol_new toonie_hp_sw __initdata = { |
1f7b49d0 BH |
159 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
160 | .name = "Headphone Playback Switch", | |
161 | .info = snd_pmac_boolean_mono_info, | |
162 | .get = toonie_get_mute_switch, | |
163 | .put = toonie_put_mute_switch, | |
164 | .private_value = TOONIE_MUTE_HP, | |
165 | }; | |
65b29f50 | 166 | static struct snd_kcontrol_new toonie_speaker_sw __initdata = { |
1f7b49d0 BH |
167 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
168 | .name = "PC Speaker Playback Switch", | |
169 | .info = snd_pmac_boolean_mono_info, | |
170 | .get = toonie_get_mute_switch, | |
171 | .put = toonie_put_mute_switch, | |
172 | .private_value = TOONIE_MUTE_AMP, | |
173 | }; | |
174 | ||
175 | /* | |
176 | * auto-mute stuffs | |
177 | */ | |
65b29f50 | 178 | static int toonie_detect_headphone(struct snd_pmac *chip) |
1f7b49d0 BH |
179 | { |
180 | struct pmac_toonie *mix = chip->mixer_data; | |
181 | int detect = 0; | |
182 | ||
183 | if (mix->hp_detect_gpio.addr) | |
184 | detect |= read_audio_gpio(&mix->hp_detect_gpio); | |
185 | return detect; | |
186 | } | |
187 | ||
65b29f50 TI |
188 | static void toonie_check_mute(struct snd_pmac *chip, struct pmac_gpio *gp, int val, |
189 | int do_notify, struct snd_kcontrol *sw) | |
1f7b49d0 BH |
190 | { |
191 | if (check_audio_gpio(gp) != val) { | |
192 | write_audio_gpio(gp, val); | |
193 | if (do_notify) | |
194 | snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, | |
195 | &sw->id); | |
196 | } | |
197 | } | |
198 | ||
199 | static void toonie_detect_handler(void *self) | |
200 | { | |
65b29f50 | 201 | struct snd_pmac *chip = (struct snd_pmac *) self; |
1f7b49d0 BH |
202 | struct pmac_toonie *mix; |
203 | int headphone; | |
204 | ||
205 | if (!chip) | |
206 | return; | |
207 | ||
208 | mix = chip->mixer_data; | |
209 | snd_assert(mix, return); | |
210 | ||
211 | headphone = toonie_detect_headphone(chip); | |
212 | ||
213 | DBG("headphone: %d, lineout: %d\n", headphone, lineout); | |
214 | ||
215 | if (headphone) { | |
216 | /* unmute headphone/lineout & mute speaker */ | |
217 | toonie_check_mute(chip, &mix->hp_mute_gpio, 0, | |
218 | mix->auto_mute_notify, chip->master_sw_ctl); | |
219 | toonie_check_mute(chip, &mix->amp_mute_gpio, 1, | |
220 | mix->auto_mute_notify, chip->speaker_sw_ctl); | |
221 | } else { | |
222 | /* unmute speaker, mute others */ | |
223 | toonie_check_mute(chip, &mix->amp_mute_gpio, 0, | |
224 | mix->auto_mute_notify, chip->speaker_sw_ctl); | |
225 | toonie_check_mute(chip, &mix->hp_mute_gpio, 1, | |
226 | mix->auto_mute_notify, chip->master_sw_ctl); | |
227 | } | |
228 | if (mix->auto_mute_notify) { | |
229 | snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, | |
230 | &chip->hp_detect_ctl->id); | |
231 | } | |
232 | } | |
233 | ||
65b29f50 | 234 | static void toonie_update_automute(struct snd_pmac *chip, int do_notify) |
1f7b49d0 BH |
235 | { |
236 | if (chip->auto_mute) { | |
237 | struct pmac_toonie *mix; | |
238 | mix = chip->mixer_data; | |
239 | snd_assert(mix, return); | |
240 | mix->auto_mute_notify = do_notify; | |
241 | schedule_work(&mix->detect_work); | |
242 | } | |
243 | } | |
244 | ||
245 | /* interrupt - headphone plug changed */ | |
246 | static irqreturn_t toonie_hp_intr(int irq, void *devid, struct pt_regs *regs) | |
247 | { | |
65b29f50 | 248 | struct snd_pmac *chip = devid; |
1f7b49d0 BH |
249 | |
250 | if (chip->update_automute && chip->initialized) { | |
251 | chip->update_automute(chip, 1); | |
252 | return IRQ_HANDLED; | |
253 | } | |
254 | return IRQ_NONE; | |
255 | } | |
256 | ||
257 | /* look for audio gpio device */ | |
258 | static int find_audio_gpio(const char *name, const char *platform, | |
259 | struct pmac_gpio *gp) | |
260 | { | |
261 | struct device_node *np; | |
262 | u32 *base, addr; | |
263 | ||
264 | if (! (np = find_devices("gpio"))) | |
265 | return -ENODEV; | |
266 | ||
267 | for (np = np->child; np; np = np->sibling) { | |
268 | char *property = get_property(np, "audio-gpio", NULL); | |
269 | if (property && strcmp(property, name) == 0) | |
270 | break; | |
271 | if (device_is_compatible(np, name)) | |
272 | break; | |
273 | } | |
274 | if (np == NULL) | |
275 | return -ENODEV; | |
276 | ||
277 | base = (u32 *)get_property(np, "AAPL,address", NULL); | |
278 | if (! base) { | |
279 | base = (u32 *)get_property(np, "reg", NULL); | |
280 | if (!base) { | |
7eb8073e | 281 | DBG("(E) cannot find address for device %s !\n", name); |
1f7b49d0 BH |
282 | return -ENODEV; |
283 | } | |
284 | addr = *base; | |
285 | if (addr < 0x50) | |
286 | addr += 0x50; | |
287 | } else | |
288 | addr = *base; | |
289 | ||
290 | gp->addr = addr & 0x0000ffff; | |
291 | ||
292 | /* Try to find the active state, default to 0 ! */ | |
293 | base = (u32 *)get_property(np, "audio-gpio-active-state", NULL); | |
294 | if (base) { | |
295 | gp->active_state = *base; | |
296 | gp->active_val = (*base) ? 0x5 : 0x4; | |
297 | gp->inactive_val = (*base) ? 0x4 : 0x5; | |
298 | } else { | |
299 | u32 *prop = NULL; | |
300 | gp->active_state = 0; | |
301 | gp->active_val = 0x4; | |
302 | gp->inactive_val = 0x5; | |
303 | /* Here are some crude hacks to extract the GPIO polarity and | |
304 | * open collector informations out of the do-platform script | |
305 | * as we don't yet have an interpreter for these things | |
306 | */ | |
307 | if (platform) | |
308 | prop = (u32 *)get_property(np, platform, NULL); | |
309 | if (prop) { | |
310 | if (prop[3] == 0x9 && prop[4] == 0x9) { | |
311 | gp->active_val = 0xd; | |
312 | gp->inactive_val = 0xc; | |
313 | } | |
314 | if (prop[3] == 0x1 && prop[4] == 0x1) { | |
315 | gp->active_val = 0x5; | |
316 | gp->inactive_val = 0x4; | |
317 | } | |
318 | } | |
319 | } | |
320 | ||
321 | DBG("(I) GPIO device %s found, offset: %x, active state: %d !\n", | |
6995f17a | 322 | name, gp->addr, gp->active_state); |
1f7b49d0 BH |
323 | |
324 | return (np->n_intrs > 0) ? np->intrs[0].line : 0; | |
325 | } | |
326 | ||
65b29f50 | 327 | static void toonie_cleanup(struct snd_pmac *chip) |
1f7b49d0 BH |
328 | { |
329 | struct pmac_toonie *mix = chip->mixer_data; | |
330 | if (! mix) | |
331 | return; | |
332 | if (mix->hp_detect_irq >= 0) | |
333 | free_irq(mix->hp_detect_irq, chip); | |
334 | kfree(mix); | |
335 | chip->mixer_data = NULL; | |
336 | } | |
337 | ||
65b29f50 | 338 | int snd_pmac_toonie_init(struct snd_pmac *chip) |
1f7b49d0 BH |
339 | { |
340 | struct pmac_toonie *mix; | |
341 | ||
342 | mix = kmalloc(sizeof(*mix), GFP_KERNEL); | |
343 | if (! mix) | |
344 | return -ENOMEM; | |
345 | ||
346 | chip->mixer_data = mix; | |
347 | chip->mixer_free = toonie_cleanup; | |
348 | ||
349 | find_audio_gpio("headphone-mute", NULL, &mix->hp_mute_gpio); | |
350 | find_audio_gpio("amp-mute", NULL, &mix->amp_mute_gpio); | |
351 | mix->hp_detect_irq = find_audio_gpio("headphone-detect", | |
352 | NULL, &mix->hp_detect_gpio); | |
353 | ||
354 | strcpy(chip->card->mixername, "PowerMac Toonie"); | |
355 | ||
356 | chip->master_sw_ctl = snd_ctl_new1(&toonie_hp_sw, chip); | |
357 | snd_ctl_add(chip->card, chip->master_sw_ctl); | |
358 | ||
359 | chip->speaker_sw_ctl = snd_ctl_new1(&toonie_speaker_sw, chip); | |
360 | snd_ctl_add(chip->card, chip->speaker_sw_ctl); | |
361 | ||
362 | INIT_WORK(&mix->detect_work, toonie_detect_handler, (void *)chip); | |
363 | ||
364 | if (mix->hp_detect_irq >= 0) { | |
365 | snd_pmac_add_automute(chip); | |
366 | ||
367 | chip->detect_headphone = toonie_detect_headphone; | |
368 | chip->update_automute = toonie_update_automute; | |
369 | toonie_update_automute(chip, 0); | |
370 | ||
371 | if (request_irq(mix->hp_detect_irq, toonie_hp_intr, 0, | |
372 | "Sound Headphone Detection", chip) < 0) | |
373 | mix->hp_detect_irq = -1; | |
374 | } | |
375 | ||
376 | return 0; | |
377 | } | |
378 |