4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
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.
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.
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
21 #include <sound/driver.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/input.h>
27 #include <sound/core.h>
28 #include <sound/control.h>
31 struct snd_pmac_beep {
32 int running; /* boolean */
33 int volume; /* mixer volume: 0-100 */
34 int volume_play; /* currently playing volume */
37 short *buf; /* allocated wave buffer */
38 unsigned long addr; /* physical address of buffer */
43 * stop beep if running
45 void snd_pmac_beep_stop(pmac_t *chip)
47 pmac_beep_t *beep = chip->beep;
48 if (beep && beep->running) {
50 snd_pmac_beep_dma_stop(chip);
55 * Stuff for outputting a beep. The values range from -327 to +327
56 * so we can multiply by an amplitude in the range 0..100 to get a
57 * signed short value to put in the output buffer.
59 static short beep_wform[256] = {
60 0, 40, 79, 117, 153, 187, 218, 245,
61 269, 288, 304, 316, 323, 327, 327, 324,
62 318, 310, 299, 288, 275, 262, 249, 236,
63 224, 213, 204, 196, 190, 186, 183, 182,
64 182, 183, 186, 189, 192, 196, 200, 203,
65 206, 208, 209, 209, 209, 207, 204, 201,
66 197, 193, 188, 183, 179, 174, 170, 166,
67 163, 161, 160, 159, 159, 160, 161, 162,
68 164, 166, 168, 169, 171, 171, 171, 170,
69 169, 167, 163, 159, 155, 150, 144, 139,
70 133, 128, 122, 117, 113, 110, 107, 105,
71 103, 103, 103, 103, 104, 104, 105, 105,
72 105, 103, 101, 97, 92, 86, 78, 68,
73 58, 45, 32, 18, 3, -11, -26, -41,
74 -55, -68, -79, -88, -95, -100, -102, -102,
75 -99, -93, -85, -75, -62, -48, -33, -16,
76 0, 16, 33, 48, 62, 75, 85, 93,
77 99, 102, 102, 100, 95, 88, 79, 68,
78 55, 41, 26, 11, -3, -18, -32, -45,
79 -58, -68, -78, -86, -92, -97, -101, -103,
80 -105, -105, -105, -104, -104, -103, -103, -103,
81 -103, -105, -107, -110, -113, -117, -122, -128,
82 -133, -139, -144, -150, -155, -159, -163, -167,
83 -169, -170, -171, -171, -171, -169, -168, -166,
84 -164, -162, -161, -160, -159, -159, -160, -161,
85 -163, -166, -170, -174, -179, -183, -188, -193,
86 -197, -201, -204, -207, -209, -209, -209, -208,
87 -206, -203, -200, -196, -192, -189, -186, -183,
88 -182, -182, -183, -186, -190, -196, -204, -213,
89 -224, -236, -249, -262, -275, -288, -299, -310,
90 -318, -324, -327, -327, -323, -316, -304, -288,
91 -269, -245, -218, -187, -153, -117, -79, -40,
94 #define BEEP_SRATE 22050 /* 22050 Hz sample rate */
95 #define BEEP_BUFLEN 512
96 #define BEEP_VOLUME 15 /* 0 - 100 */
98 static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type, unsigned int code, int hz)
105 int period, ncycles, nsamples;
113 case SND_BELL: if (hz) hz = 1000;
114 case SND_TONE: break;
119 if (! chip || (beep = chip->beep) == NULL)
123 spin_lock_irqsave(&chip->reg_lock, flags);
125 snd_pmac_beep_stop(chip);
126 spin_unlock_irqrestore(&chip->reg_lock, flags);
130 beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE);
131 srate = chip->freq_table[beep_speed];
133 if (hz <= srate / BEEP_BUFLEN || hz > srate / 2)
136 spin_lock_irqsave(&chip->reg_lock, flags);
137 if (chip->playback.running || chip->capture.running || beep->running) {
138 spin_unlock_irqrestore(&chip->reg_lock, flags);
142 spin_unlock_irqrestore(&chip->reg_lock, flags);
144 if (hz == beep->hz && beep->volume == beep->volume_play) {
145 nsamples = beep->nsamples;
147 period = srate * 256 / hz; /* fixed point */
148 ncycles = BEEP_BUFLEN * 256 / period;
149 nsamples = (period * ncycles) >> 8;
150 f = ncycles * 65536 / nsamples;
153 for (i = 0; i < nsamples; ++i, p += 2) {
154 p[0] = p[1] = beep_wform[j >> 8] * beep->volume;
155 j = (j + f) & 0xffff;
158 beep->volume_play = beep->volume;
159 beep->nsamples = nsamples;
162 spin_lock_irqsave(&chip->reg_lock, flags);
163 snd_pmac_beep_dma_start(chip, beep->nsamples * 4, beep->addr, beep_speed);
164 spin_unlock_irqrestore(&chip->reg_lock, flags);
172 #define chip_t pmac_t
174 static int snd_pmac_info_beep(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
176 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
178 uinfo->value.integer.min = 0;
179 uinfo->value.integer.max = 100;
183 static int snd_pmac_get_beep(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
185 pmac_t *chip = snd_kcontrol_chip(kcontrol);
186 snd_assert(chip->beep, return -ENXIO);
187 ucontrol->value.integer.value[0] = chip->beep->volume;
191 static int snd_pmac_put_beep(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
193 pmac_t *chip = snd_kcontrol_chip(kcontrol);
195 snd_assert(chip->beep, return -ENXIO);
196 oval = chip->beep->volume;
197 chip->beep->volume = ucontrol->value.integer.value[0];
198 return oval != chip->beep->volume;
201 static snd_kcontrol_new_t snd_pmac_beep_mixer = {
202 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
203 .name = "Beep Playback Volume",
204 .info = snd_pmac_info_beep,
205 .get = snd_pmac_get_beep,
206 .put = snd_pmac_put_beep,
209 /* Initialize beep stuff */
210 int __init snd_pmac_attach_beep(pmac_t *chip)
215 beep = kmalloc(sizeof(*beep), GFP_KERNEL);
219 memset(beep, 0, sizeof(*beep));
220 beep->buf = (short *) kmalloc(BEEP_BUFLEN * 4, GFP_KERNEL);
225 beep->addr = virt_to_bus(beep->buf);
227 beep->dev.evbit[0] = BIT(EV_SND);
228 beep->dev.sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
229 beep->dev.event = snd_pmac_beep_event;
230 beep->dev.private = chip;
232 /* FIXME: set more better values */
233 beep->dev.name = "PowerMac Beep";
234 beep->dev.phys = "powermac/beep";
235 beep->dev.id.bustype = BUS_ADB;
236 beep->dev.id.vendor = 0x001f;
237 beep->dev.id.product = 0x0001;
238 beep->dev.id.version = 0x0100;
240 beep->volume = BEEP_VOLUME;
242 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_pmac_beep_mixer, chip))) < 0) {
249 input_register_device(&beep->dev);
254 void snd_pmac_detach_beep(pmac_t *chip)
257 input_unregister_device(&chip->beep->dev);
258 kfree(chip->beep->buf);