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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> | |
25 | #include <linux/i2c-dev.h> | |
26 | #include <linux/kmod.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <sound/core.h> | |
30 | #include <asm/io.h> | |
31 | #include <asm/irq.h> | |
32 | #include <asm/machdep.h> | |
33 | #include <asm/pmac_feature.h> | |
34 | #include "pmac.h" | |
35 | ||
36 | #undef DEBUG | |
37 | ||
38 | #ifdef DEBUG | |
39 | #define DBG(fmt...) printk(fmt) | |
40 | #else | |
41 | #define DBG(fmt...) | |
42 | #endif | |
43 | ||
44 | struct pmac_gpio { | |
45 | unsigned int addr; | |
46 | u8 active_val; | |
47 | u8 inactive_val; | |
48 | u8 active_state; | |
49 | }; | |
50 | ||
51 | struct pmac_toonie | |
52 | { | |
53 | struct pmac_gpio hp_detect_gpio; | |
54 | struct pmac_gpio hp_mute_gpio; | |
55 | struct pmac_gpio amp_mute_gpio; | |
56 | int hp_detect_irq; | |
57 | int auto_mute_notify; | |
58 | struct work_struct detect_work; | |
59 | }; | |
60 | ||
61 | ||
62 | /* | |
63 | * gpio access | |
64 | */ | |
65 | #define do_gpio_write(gp, val) \ | |
66 | pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, (gp)->addr, val) | |
67 | #define do_gpio_read(gp) \ | |
68 | pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, (gp)->addr, 0) | |
69 | #define tumbler_gpio_free(gp) /* NOP */ | |
70 | ||
71 | static void write_audio_gpio(struct pmac_gpio *gp, int active) | |
72 | { | |
73 | if (! gp->addr) | |
74 | return; | |
75 | active = active ? gp->active_val : gp->inactive_val; | |
76 | do_gpio_write(gp, active); | |
77 | DBG("(I) gpio %x write %d\n", gp->addr, active); | |
78 | } | |
79 | ||
80 | static int check_audio_gpio(struct pmac_gpio *gp) | |
81 | { | |
82 | int ret; | |
83 | ||
84 | if (! gp->addr) | |
85 | return 0; | |
86 | ||
87 | ret = do_gpio_read(gp); | |
88 | ||
89 | return (ret & 0xd) == (gp->active_val & 0xd); | |
90 | } | |
91 | ||
92 | static int read_audio_gpio(struct pmac_gpio *gp) | |
93 | { | |
94 | int ret; | |
95 | if (! gp->addr) | |
96 | return 0; | |
97 | ret = ((do_gpio_read(gp) & 0x02) !=0); | |
98 | return ret == gp->active_state; | |
99 | } | |
100 | ||
101 | ||
102 | enum { TOONIE_MUTE_HP, TOONIE_MUTE_AMP }; | |
103 | ||
65b29f50 TI |
104 | static int toonie_get_mute_switch(struct snd_kcontrol *kcontrol, |
105 | struct snd_ctl_elem_value *ucontrol) | |
1f7b49d0 | 106 | { |
65b29f50 | 107 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
1f7b49d0 BH |
108 | struct pmac_toonie *mix = chip->mixer_data; |
109 | struct pmac_gpio *gp; | |
110 | ||
111 | if (mix == NULL) | |
112 | return -ENODEV; | |
113 | switch(kcontrol->private_value) { | |
114 | case TOONIE_MUTE_HP: | |
115 | gp = &mix->hp_mute_gpio; | |
116 | break; | |
117 | case TOONIE_MUTE_AMP: | |
118 | gp = &mix->amp_mute_gpio; | |
119 | break; | |
120 | default: | |
121 | return -EINVAL;; | |
122 | } | |
123 | ucontrol->value.integer.value[0] = !check_audio_gpio(gp); | |
124 | return 0; | |
125 | } | |
126 | ||
65b29f50 TI |
127 | static int toonie_put_mute_switch(struct snd_kcontrol *kcontrol, |
128 | struct snd_ctl_elem_value *ucontrol) | |
1f7b49d0 | 129 | { |
65b29f50 | 130 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
1f7b49d0 BH |
131 | struct pmac_toonie *mix = chip->mixer_data; |
132 | struct pmac_gpio *gp; | |
133 | int val; | |
134 | ||
135 | if (chip->update_automute && chip->auto_mute) | |
136 | return 0; /* don't touch in the auto-mute mode */ | |
137 | ||
138 | if (mix == NULL) | |
139 | return -ENODEV; | |
140 | ||
141 | switch(kcontrol->private_value) { | |
142 | case TOONIE_MUTE_HP: | |
143 | gp = &mix->hp_mute_gpio; | |
144 | break; | |
145 | case TOONIE_MUTE_AMP: | |
146 | gp = &mix->amp_mute_gpio; | |
147 | break; | |
148 | default: | |
149 | return -EINVAL;; | |
150 | } | |
151 | val = ! check_audio_gpio(gp); | |
152 | if (val != ucontrol->value.integer.value[0]) { | |
153 | write_audio_gpio(gp, ! ucontrol->value.integer.value[0]); | |
154 | return 1; | |
155 | } | |
156 | return 0; | |
157 | } | |
158 | ||
65b29f50 | 159 | static struct snd_kcontrol_new toonie_hp_sw __initdata = { |
1f7b49d0 BH |
160 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
161 | .name = "Headphone Playback Switch", | |
162 | .info = snd_pmac_boolean_mono_info, | |
163 | .get = toonie_get_mute_switch, | |
164 | .put = toonie_put_mute_switch, | |
165 | .private_value = TOONIE_MUTE_HP, | |
166 | }; | |
65b29f50 | 167 | static struct snd_kcontrol_new toonie_speaker_sw __initdata = { |
1f7b49d0 BH |
168 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
169 | .name = "PC Speaker Playback Switch", | |
170 | .info = snd_pmac_boolean_mono_info, | |
171 | .get = toonie_get_mute_switch, | |
172 | .put = toonie_put_mute_switch, | |
173 | .private_value = TOONIE_MUTE_AMP, | |
174 | }; | |
175 | ||
176 | /* | |
177 | * auto-mute stuffs | |
178 | */ | |
65b29f50 | 179 | static int toonie_detect_headphone(struct snd_pmac *chip) |
1f7b49d0 BH |
180 | { |
181 | struct pmac_toonie *mix = chip->mixer_data; | |
182 | int detect = 0; | |
183 | ||
184 | if (mix->hp_detect_gpio.addr) | |
185 | detect |= read_audio_gpio(&mix->hp_detect_gpio); | |
186 | return detect; | |
187 | } | |
188 | ||
65b29f50 TI |
189 | static void toonie_check_mute(struct snd_pmac *chip, struct pmac_gpio *gp, int val, |
190 | int do_notify, struct snd_kcontrol *sw) | |
1f7b49d0 BH |
191 | { |
192 | if (check_audio_gpio(gp) != val) { | |
193 | write_audio_gpio(gp, val); | |
194 | if (do_notify) | |
195 | snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, | |
196 | &sw->id); | |
197 | } | |
198 | } | |
199 | ||
200 | static void toonie_detect_handler(void *self) | |
201 | { | |
65b29f50 | 202 | struct snd_pmac *chip = (struct snd_pmac *) self; |
1f7b49d0 BH |
203 | struct pmac_toonie *mix; |
204 | int headphone; | |
205 | ||
206 | if (!chip) | |
207 | return; | |
208 | ||
209 | mix = chip->mixer_data; | |
210 | snd_assert(mix, return); | |
211 | ||
212 | headphone = toonie_detect_headphone(chip); | |
213 | ||
214 | DBG("headphone: %d, lineout: %d\n", headphone, lineout); | |
215 | ||
216 | if (headphone) { | |
217 | /* unmute headphone/lineout & mute speaker */ | |
218 | toonie_check_mute(chip, &mix->hp_mute_gpio, 0, | |
219 | mix->auto_mute_notify, chip->master_sw_ctl); | |
220 | toonie_check_mute(chip, &mix->amp_mute_gpio, 1, | |
221 | mix->auto_mute_notify, chip->speaker_sw_ctl); | |
222 | } else { | |
223 | /* unmute speaker, mute others */ | |
224 | toonie_check_mute(chip, &mix->amp_mute_gpio, 0, | |
225 | mix->auto_mute_notify, chip->speaker_sw_ctl); | |
226 | toonie_check_mute(chip, &mix->hp_mute_gpio, 1, | |
227 | mix->auto_mute_notify, chip->master_sw_ctl); | |
228 | } | |
229 | if (mix->auto_mute_notify) { | |
230 | snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, | |
231 | &chip->hp_detect_ctl->id); | |
232 | } | |
233 | } | |
234 | ||
65b29f50 | 235 | static void toonie_update_automute(struct snd_pmac *chip, int do_notify) |
1f7b49d0 BH |
236 | { |
237 | if (chip->auto_mute) { | |
238 | struct pmac_toonie *mix; | |
239 | mix = chip->mixer_data; | |
240 | snd_assert(mix, return); | |
241 | mix->auto_mute_notify = do_notify; | |
242 | schedule_work(&mix->detect_work); | |
243 | } | |
244 | } | |
245 | ||
246 | /* interrupt - headphone plug changed */ | |
247 | static irqreturn_t toonie_hp_intr(int irq, void *devid, struct pt_regs *regs) | |
248 | { | |
65b29f50 | 249 | struct snd_pmac *chip = devid; |
1f7b49d0 BH |
250 | |
251 | if (chip->update_automute && chip->initialized) { | |
252 | chip->update_automute(chip, 1); | |
253 | return IRQ_HANDLED; | |
254 | } | |
255 | return IRQ_NONE; | |
256 | } | |
257 | ||
258 | /* look for audio gpio device */ | |
259 | static int find_audio_gpio(const char *name, const char *platform, | |
260 | struct pmac_gpio *gp) | |
261 | { | |
262 | struct device_node *np; | |
263 | u32 *base, addr; | |
264 | ||
265 | if (! (np = find_devices("gpio"))) | |
266 | return -ENODEV; | |
267 | ||
268 | for (np = np->child; np; np = np->sibling) { | |
269 | char *property = get_property(np, "audio-gpio", NULL); | |
270 | if (property && strcmp(property, name) == 0) | |
271 | break; | |
272 | if (device_is_compatible(np, name)) | |
273 | break; | |
274 | } | |
275 | if (np == NULL) | |
276 | return -ENODEV; | |
277 | ||
278 | base = (u32 *)get_property(np, "AAPL,address", NULL); | |
279 | if (! base) { | |
280 | base = (u32 *)get_property(np, "reg", NULL); | |
281 | if (!base) { | |
7eb8073e | 282 | DBG("(E) cannot find address for device %s !\n", name); |
1f7b49d0 BH |
283 | return -ENODEV; |
284 | } | |
285 | addr = *base; | |
286 | if (addr < 0x50) | |
287 | addr += 0x50; | |
288 | } else | |
289 | addr = *base; | |
290 | ||
291 | gp->addr = addr & 0x0000ffff; | |
292 | ||
293 | /* Try to find the active state, default to 0 ! */ | |
294 | base = (u32 *)get_property(np, "audio-gpio-active-state", NULL); | |
295 | if (base) { | |
296 | gp->active_state = *base; | |
297 | gp->active_val = (*base) ? 0x5 : 0x4; | |
298 | gp->inactive_val = (*base) ? 0x4 : 0x5; | |
299 | } else { | |
300 | u32 *prop = NULL; | |
301 | gp->active_state = 0; | |
302 | gp->active_val = 0x4; | |
303 | gp->inactive_val = 0x5; | |
304 | /* Here are some crude hacks to extract the GPIO polarity and | |
305 | * open collector informations out of the do-platform script | |
306 | * as we don't yet have an interpreter for these things | |
307 | */ | |
308 | if (platform) | |
309 | prop = (u32 *)get_property(np, platform, NULL); | |
310 | if (prop) { | |
311 | if (prop[3] == 0x9 && prop[4] == 0x9) { | |
312 | gp->active_val = 0xd; | |
313 | gp->inactive_val = 0xc; | |
314 | } | |
315 | if (prop[3] == 0x1 && prop[4] == 0x1) { | |
316 | gp->active_val = 0x5; | |
317 | gp->inactive_val = 0x4; | |
318 | } | |
319 | } | |
320 | } | |
321 | ||
322 | DBG("(I) GPIO device %s found, offset: %x, active state: %d !\n", | |
6995f17a | 323 | name, gp->addr, gp->active_state); |
1f7b49d0 BH |
324 | |
325 | return (np->n_intrs > 0) ? np->intrs[0].line : 0; | |
326 | } | |
327 | ||
65b29f50 | 328 | static void toonie_cleanup(struct snd_pmac *chip) |
1f7b49d0 BH |
329 | { |
330 | struct pmac_toonie *mix = chip->mixer_data; | |
331 | if (! mix) | |
332 | return; | |
333 | if (mix->hp_detect_irq >= 0) | |
334 | free_irq(mix->hp_detect_irq, chip); | |
335 | kfree(mix); | |
336 | chip->mixer_data = NULL; | |
337 | } | |
338 | ||
65b29f50 | 339 | int snd_pmac_toonie_init(struct snd_pmac *chip) |
1f7b49d0 BH |
340 | { |
341 | struct pmac_toonie *mix; | |
342 | ||
343 | mix = kmalloc(sizeof(*mix), GFP_KERNEL); | |
344 | if (! mix) | |
345 | return -ENOMEM; | |
346 | ||
347 | chip->mixer_data = mix; | |
348 | chip->mixer_free = toonie_cleanup; | |
349 | ||
350 | find_audio_gpio("headphone-mute", NULL, &mix->hp_mute_gpio); | |
351 | find_audio_gpio("amp-mute", NULL, &mix->amp_mute_gpio); | |
352 | mix->hp_detect_irq = find_audio_gpio("headphone-detect", | |
353 | NULL, &mix->hp_detect_gpio); | |
354 | ||
355 | strcpy(chip->card->mixername, "PowerMac Toonie"); | |
356 | ||
357 | chip->master_sw_ctl = snd_ctl_new1(&toonie_hp_sw, chip); | |
358 | snd_ctl_add(chip->card, chip->master_sw_ctl); | |
359 | ||
360 | chip->speaker_sw_ctl = snd_ctl_new1(&toonie_speaker_sw, chip); | |
361 | snd_ctl_add(chip->card, chip->speaker_sw_ctl); | |
362 | ||
363 | INIT_WORK(&mix->detect_work, toonie_detect_handler, (void *)chip); | |
364 | ||
365 | if (mix->hp_detect_irq >= 0) { | |
366 | snd_pmac_add_automute(chip); | |
367 | ||
368 | chip->detect_headphone = toonie_detect_headphone; | |
369 | chip->update_automute = toonie_update_automute; | |
370 | toonie_update_automute(chip, 0); | |
371 | ||
372 | if (request_irq(mix->hp_detect_irq, toonie_hp_intr, 0, | |
373 | "Sound Headphone Detection", chip) < 0) | |
374 | mix->hp_detect_irq = -1; | |
375 | } | |
376 | ||
377 | return 0; | |
378 | } | |
379 |