fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / sound / ppc / beep.c
bloba1aa89f2faf3bc9e6f25ccb3784871d0631a49dd
1 /*
2 * Beep using pcm
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>
22 #include <asm/io.h>
23 #include <asm/irq.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/input.h>
27 #include <linux/pci.h>
28 #include <linux/dma-mapping.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include "pmac.h"
33 struct pmac_beep {
34 int running; /* boolean */
35 int volume; /* mixer volume: 0-100 */
36 int volume_play; /* currently playing volume */
37 int hz;
38 int nsamples;
39 short *buf; /* allocated wave buffer */
40 dma_addr_t addr; /* physical address of buffer */
41 struct input_dev *dev;
45 * stop beep if running
47 void snd_pmac_beep_stop(struct snd_pmac *chip)
49 struct pmac_beep *beep = chip->beep;
50 if (beep && beep->running) {
51 beep->running = 0;
52 snd_pmac_beep_dma_stop(chip);
57 * Stuff for outputting a beep. The values range from -327 to +327
58 * so we can multiply by an amplitude in the range 0..100 to get a
59 * signed short value to put in the output buffer.
61 static short beep_wform[256] = {
62 0, 40, 79, 117, 153, 187, 218, 245,
63 269, 288, 304, 316, 323, 327, 327, 324,
64 318, 310, 299, 288, 275, 262, 249, 236,
65 224, 213, 204, 196, 190, 186, 183, 182,
66 182, 183, 186, 189, 192, 196, 200, 203,
67 206, 208, 209, 209, 209, 207, 204, 201,
68 197, 193, 188, 183, 179, 174, 170, 166,
69 163, 161, 160, 159, 159, 160, 161, 162,
70 164, 166, 168, 169, 171, 171, 171, 170,
71 169, 167, 163, 159, 155, 150, 144, 139,
72 133, 128, 122, 117, 113, 110, 107, 105,
73 103, 103, 103, 103, 104, 104, 105, 105,
74 105, 103, 101, 97, 92, 86, 78, 68,
75 58, 45, 32, 18, 3, -11, -26, -41,
76 -55, -68, -79, -88, -95, -100, -102, -102,
77 -99, -93, -85, -75, -62, -48, -33, -16,
78 0, 16, 33, 48, 62, 75, 85, 93,
79 99, 102, 102, 100, 95, 88, 79, 68,
80 55, 41, 26, 11, -3, -18, -32, -45,
81 -58, -68, -78, -86, -92, -97, -101, -103,
82 -105, -105, -105, -104, -104, -103, -103, -103,
83 -103, -105, -107, -110, -113, -117, -122, -128,
84 -133, -139, -144, -150, -155, -159, -163, -167,
85 -169, -170, -171, -171, -171, -169, -168, -166,
86 -164, -162, -161, -160, -159, -159, -160, -161,
87 -163, -166, -170, -174, -179, -183, -188, -193,
88 -197, -201, -204, -207, -209, -209, -209, -208,
89 -206, -203, -200, -196, -192, -189, -186, -183,
90 -182, -182, -183, -186, -190, -196, -204, -213,
91 -224, -236, -249, -262, -275, -288, -299, -310,
92 -318, -324, -327, -327, -323, -316, -304, -288,
93 -269, -245, -218, -187, -153, -117, -79, -40,
96 #define BEEP_SRATE 22050 /* 22050 Hz sample rate */
97 #define BEEP_BUFLEN 512
98 #define BEEP_VOLUME 15 /* 0 - 100 */
100 static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type,
101 unsigned int code, int hz)
103 struct snd_pmac *chip;
104 struct pmac_beep *beep;
105 unsigned long flags;
106 int beep_speed = 0;
107 int srate;
108 int period, ncycles, nsamples;
109 int i, j, f;
110 short *p;
112 if (type != EV_SND)
113 return -1;
115 switch (code) {
116 case SND_BELL: if (hz) hz = 1000;
117 case SND_TONE: break;
118 default: return -1;
121 chip = input_get_drvdata(dev);
122 if (! chip || (beep = chip->beep) == NULL)
123 return -1;
125 if (! hz) {
126 spin_lock_irqsave(&chip->reg_lock, flags);
127 if (beep->running)
128 snd_pmac_beep_stop(chip);
129 spin_unlock_irqrestore(&chip->reg_lock, flags);
130 return 0;
133 beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE);
134 srate = chip->freq_table[beep_speed];
136 if (hz <= srate / BEEP_BUFLEN || hz > srate / 2)
137 hz = 1000;
139 spin_lock_irqsave(&chip->reg_lock, flags);
140 if (chip->playback.running || chip->capture.running || beep->running) {
141 spin_unlock_irqrestore(&chip->reg_lock, flags);
142 return 0;
144 beep->running = 1;
145 spin_unlock_irqrestore(&chip->reg_lock, flags);
147 if (hz == beep->hz && beep->volume == beep->volume_play) {
148 nsamples = beep->nsamples;
149 } else {
150 period = srate * 256 / hz; /* fixed point */
151 ncycles = BEEP_BUFLEN * 256 / period;
152 nsamples = (period * ncycles) >> 8;
153 f = ncycles * 65536 / nsamples;
154 j = 0;
155 p = beep->buf;
156 for (i = 0; i < nsamples; ++i, p += 2) {
157 p[0] = p[1] = beep_wform[j >> 8] * beep->volume;
158 j = (j + f) & 0xffff;
160 beep->hz = hz;
161 beep->volume_play = beep->volume;
162 beep->nsamples = nsamples;
165 spin_lock_irqsave(&chip->reg_lock, flags);
166 snd_pmac_beep_dma_start(chip, beep->nsamples * 4, beep->addr, beep_speed);
167 spin_unlock_irqrestore(&chip->reg_lock, flags);
168 return 0;
172 * beep volume mixer
175 static int snd_pmac_info_beep(struct snd_kcontrol *kcontrol,
176 struct snd_ctl_elem_info *uinfo)
178 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
179 uinfo->count = 1;
180 uinfo->value.integer.min = 0;
181 uinfo->value.integer.max = 100;
182 return 0;
185 static int snd_pmac_get_beep(struct snd_kcontrol *kcontrol,
186 struct snd_ctl_elem_value *ucontrol)
188 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
189 snd_assert(chip->beep, return -ENXIO);
190 ucontrol->value.integer.value[0] = chip->beep->volume;
191 return 0;
194 static int snd_pmac_put_beep(struct snd_kcontrol *kcontrol,
195 struct snd_ctl_elem_value *ucontrol)
197 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
198 int oval;
199 snd_assert(chip->beep, return -ENXIO);
200 oval = chip->beep->volume;
201 chip->beep->volume = ucontrol->value.integer.value[0];
202 return oval != chip->beep->volume;
205 static struct snd_kcontrol_new snd_pmac_beep_mixer = {
206 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
207 .name = "Beep Playback Volume",
208 .info = snd_pmac_info_beep,
209 .get = snd_pmac_get_beep,
210 .put = snd_pmac_put_beep,
213 /* Initialize beep stuff */
214 int __init snd_pmac_attach_beep(struct snd_pmac *chip)
216 struct pmac_beep *beep;
217 struct input_dev *input_dev;
218 struct snd_kcontrol *beep_ctl;
219 void *dmabuf;
220 int err = -ENOMEM;
222 beep = kzalloc(sizeof(*beep), GFP_KERNEL);
223 if (! beep)
224 return -ENOMEM;
225 dmabuf = dma_alloc_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
226 &beep->addr, GFP_KERNEL);
227 input_dev = input_allocate_device();
228 if (! dmabuf || ! input_dev)
229 goto fail1;
231 /* FIXME: set more better values */
232 input_dev->name = "PowerMac Beep";
233 input_dev->phys = "powermac/beep";
234 input_dev->id.bustype = BUS_ADB;
235 input_dev->id.vendor = 0x001f;
236 input_dev->id.product = 0x0001;
237 input_dev->id.version = 0x0100;
239 input_dev->evbit[0] = BIT(EV_SND);
240 input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
241 input_dev->event = snd_pmac_beep_event;
242 input_dev->dev.parent = &chip->pdev->dev;
243 input_set_drvdata(input_dev, chip);
245 beep->dev = input_dev;
246 beep->buf = dmabuf;
247 beep->volume = BEEP_VOLUME;
248 beep->running = 0;
250 beep_ctl = snd_ctl_new1(&snd_pmac_beep_mixer, chip);
251 err = snd_ctl_add(chip->card, beep_ctl);
252 if (err < 0)
253 goto fail1;
255 chip->beep = beep;
257 err = input_register_device(beep->dev);
258 if (err)
259 goto fail2;
261 return 0;
263 fail2: snd_ctl_remove(chip->card, beep_ctl);
264 fail1: input_free_device(input_dev);
265 if (dmabuf)
266 dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
267 dmabuf, beep->addr);
268 kfree(beep);
269 return err;
272 void snd_pmac_detach_beep(struct snd_pmac *chip)
274 if (chip->beep) {
275 input_unregister_device(chip->beep->dev);
276 dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
277 chip->beep->buf, chip->beep->addr);
278 kfree(chip->beep);
279 chip->beep = NULL;