Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Beep using pcm | |
3 | * | |
4 | * Copyright (c) by Takashi Iwai <tiwai@suse.de> | |
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 <asm/io.h> | |
23 | #include <asm/irq.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/input.h> | |
7bbd8277 BH |
27 | #include <linux/pci.h> |
28 | #include <linux/dma-mapping.h> | |
1da177e4 LT |
29 | #include <sound/core.h> |
30 | #include <sound/control.h> | |
31 | #include "pmac.h" | |
32 | ||
65b29f50 | 33 | struct pmac_beep { |
5ebdcbc2 DT |
34 | int running; /* boolean */ |
35 | int volume; /* mixer volume: 0-100 */ | |
1da177e4 LT |
36 | int volume_play; /* currently playing volume */ |
37 | int hz; | |
38 | int nsamples; | |
39 | short *buf; /* allocated wave buffer */ | |
7bbd8277 | 40 | dma_addr_t addr; /* physical address of buffer */ |
5ebdcbc2 | 41 | struct input_dev *dev; |
1da177e4 LT |
42 | }; |
43 | ||
44 | /* | |
45 | * stop beep if running | |
46 | */ | |
65b29f50 | 47 | void snd_pmac_beep_stop(struct snd_pmac *chip) |
1da177e4 | 48 | { |
65b29f50 | 49 | struct pmac_beep *beep = chip->beep; |
1da177e4 LT |
50 | if (beep && beep->running) { |
51 | beep->running = 0; | |
52 | snd_pmac_beep_dma_stop(chip); | |
53 | } | |
54 | } | |
55 | ||
56 | /* | |
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. | |
60 | */ | |
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, | |
94 | }; | |
95 | ||
96 | #define BEEP_SRATE 22050 /* 22050 Hz sample rate */ | |
97 | #define BEEP_BUFLEN 512 | |
98 | #define BEEP_VOLUME 15 /* 0 - 100 */ | |
99 | ||
65b29f50 TI |
100 | static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type, |
101 | unsigned int code, int hz) | |
1da177e4 | 102 | { |
65b29f50 TI |
103 | struct snd_pmac *chip; |
104 | struct pmac_beep *beep; | |
1da177e4 LT |
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; | |
111 | ||
112 | if (type != EV_SND) | |
113 | return -1; | |
114 | ||
115 | switch (code) { | |
116 | case SND_BELL: if (hz) hz = 1000; | |
117 | case SND_TONE: break; | |
118 | default: return -1; | |
119 | } | |
120 | ||
121 | chip = dev->private; | |
122 | if (! chip || (beep = chip->beep) == NULL) | |
123 | return -1; | |
124 | ||
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; | |
131 | } | |
132 | ||
133 | beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE); | |
134 | srate = chip->freq_table[beep_speed]; | |
135 | ||
136 | if (hz <= srate / BEEP_BUFLEN || hz > srate / 2) | |
137 | hz = 1000; | |
138 | ||
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; | |
143 | } | |
144 | beep->running = 1; | |
145 | spin_unlock_irqrestore(&chip->reg_lock, flags); | |
146 | ||
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; | |
159 | } | |
160 | beep->hz = hz; | |
161 | beep->volume_play = beep->volume; | |
162 | beep->nsamples = nsamples; | |
163 | } | |
164 | ||
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; | |
169 | } | |
170 | ||
171 | /* | |
172 | * beep volume mixer | |
173 | */ | |
174 | ||
65b29f50 TI |
175 | static int snd_pmac_info_beep(struct snd_kcontrol *kcontrol, |
176 | struct snd_ctl_elem_info *uinfo) | |
1da177e4 LT |
177 | { |
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; | |
183 | } | |
184 | ||
65b29f50 TI |
185 | static int snd_pmac_get_beep(struct snd_kcontrol *kcontrol, |
186 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 187 | { |
65b29f50 | 188 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
189 | snd_assert(chip->beep, return -ENXIO); |
190 | ucontrol->value.integer.value[0] = chip->beep->volume; | |
191 | return 0; | |
192 | } | |
193 | ||
65b29f50 TI |
194 | static int snd_pmac_put_beep(struct snd_kcontrol *kcontrol, |
195 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 196 | { |
65b29f50 | 197 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
1da177e4 LT |
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; | |
203 | } | |
204 | ||
65b29f50 | 205 | static struct snd_kcontrol_new snd_pmac_beep_mixer = { |
1da177e4 LT |
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, | |
211 | }; | |
212 | ||
213 | /* Initialize beep stuff */ | |
65b29f50 | 214 | int __init snd_pmac_attach_beep(struct snd_pmac *chip) |
1da177e4 | 215 | { |
65b29f50 | 216 | struct pmac_beep *beep; |
5ebdcbc2 | 217 | struct input_dev *input_dev; |
f03d68fe | 218 | struct snd_kcontrol *beep_ctl; |
5ebdcbc2 DT |
219 | void *dmabuf; |
220 | int err = -ENOMEM; | |
1da177e4 | 221 | |
5ebdcbc2 | 222 | beep = kzalloc(sizeof(*beep), GFP_KERNEL); |
f03d68fe DT |
223 | if (! beep) |
224 | return -ENOMEM; | |
5ebdcbc2 DT |
225 | dmabuf = dma_alloc_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4, |
226 | &beep->addr, GFP_KERNEL); | |
227 | input_dev = input_allocate_device(); | |
f03d68fe DT |
228 | if (! dmabuf || ! input_dev) |
229 | goto fail1; | |
1da177e4 LT |
230 | |
231 | /* FIXME: set more better values */ | |
5ebdcbc2 DT |
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; | |
238 | ||
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->private = chip; | |
243 | input_dev->cdev.dev = &chip->pdev->dev; | |
1da177e4 | 244 | |
5ebdcbc2 DT |
245 | beep->dev = input_dev; |
246 | beep->buf = dmabuf; | |
1da177e4 LT |
247 | beep->volume = BEEP_VOLUME; |
248 | beep->running = 0; | |
5ebdcbc2 | 249 | |
f03d68fe DT |
250 | beep_ctl = snd_ctl_new1(&snd_pmac_beep_mixer, chip); |
251 | err = snd_ctl_add(chip->card, beep_ctl); | |
5ebdcbc2 | 252 | if (err < 0) |
f03d68fe DT |
253 | goto fail1; |
254 | ||
255 | chip->beep = beep; | |
1da177e4 | 256 | |
f03d68fe DT |
257 | err = input_register_device(beep->dev); |
258 | if (err) | |
259 | goto fail2; | |
260 | ||
261 | return 0; | |
262 | ||
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); | |
5ebdcbc2 DT |
268 | kfree(beep); |
269 | return err; | |
1da177e4 LT |
270 | } |
271 | ||
65b29f50 | 272 | void snd_pmac_detach_beep(struct snd_pmac *chip) |
1da177e4 LT |
273 | { |
274 | if (chip->beep) { | |
5ebdcbc2 | 275 | input_unregister_device(chip->beep->dev); |
7bbd8277 BH |
276 | dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4, |
277 | chip->beep->buf, chip->beep->addr); | |
1da177e4 LT |
278 | kfree(chip->beep); |
279 | chip->beep = NULL; | |
280 | } | |
281 | } |