diff options
Diffstat (limited to 'sound/ppc/beep.c')
-rw-r--r-- | sound/ppc/beep.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/sound/ppc/beep.c b/sound/ppc/beep.c new file mode 100644 index 000000000000..c23f601a37f9 --- /dev/null +++ b/sound/ppc/beep.c | |||
@@ -0,0 +1,262 @@ | |||
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> | ||
27 | #include <sound/core.h> | ||
28 | #include <sound/control.h> | ||
29 | #include "pmac.h" | ||
30 | |||
31 | struct snd_pmac_beep { | ||
32 | int running; /* boolean */ | ||
33 | int volume; /* mixer volume: 0-100 */ | ||
34 | int volume_play; /* currently playing volume */ | ||
35 | int hz; | ||
36 | int nsamples; | ||
37 | short *buf; /* allocated wave buffer */ | ||
38 | unsigned long addr; /* physical address of buffer */ | ||
39 | struct input_dev dev; | ||
40 | }; | ||
41 | |||
42 | /* | ||
43 | * stop beep if running | ||
44 | */ | ||
45 | void snd_pmac_beep_stop(pmac_t *chip) | ||
46 | { | ||
47 | pmac_beep_t *beep = chip->beep; | ||
48 | if (beep && beep->running) { | ||
49 | beep->running = 0; | ||
50 | snd_pmac_beep_dma_stop(chip); | ||
51 | } | ||
52 | } | ||
53 | |||
54 | /* | ||
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. | ||
58 | */ | ||
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, | ||
92 | }; | ||
93 | |||
94 | #define BEEP_SRATE 22050 /* 22050 Hz sample rate */ | ||
95 | #define BEEP_BUFLEN 512 | ||
96 | #define BEEP_VOLUME 15 /* 0 - 100 */ | ||
97 | |||
98 | static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type, unsigned int code, int hz) | ||
99 | { | ||
100 | pmac_t *chip; | ||
101 | pmac_beep_t *beep; | ||
102 | unsigned long flags; | ||
103 | int beep_speed = 0; | ||
104 | int srate; | ||
105 | int period, ncycles, nsamples; | ||
106 | int i, j, f; | ||
107 | short *p; | ||
108 | |||
109 | if (type != EV_SND) | ||
110 | return -1; | ||
111 | |||
112 | switch (code) { | ||
113 | case SND_BELL: if (hz) hz = 1000; | ||
114 | case SND_TONE: break; | ||
115 | default: return -1; | ||
116 | } | ||
117 | |||
118 | chip = dev->private; | ||
119 | if (! chip || (beep = chip->beep) == NULL) | ||
120 | return -1; | ||
121 | |||
122 | if (! hz) { | ||
123 | spin_lock_irqsave(&chip->reg_lock, flags); | ||
124 | if (beep->running) | ||
125 | snd_pmac_beep_stop(chip); | ||
126 | spin_unlock_irqrestore(&chip->reg_lock, flags); | ||
127 | return 0; | ||
128 | } | ||
129 | |||
130 | beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE); | ||
131 | srate = chip->freq_table[beep_speed]; | ||
132 | |||
133 | if (hz <= srate / BEEP_BUFLEN || hz > srate / 2) | ||
134 | hz = 1000; | ||
135 | |||
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); | ||
139 | return 0; | ||
140 | } | ||
141 | beep->running = 1; | ||
142 | spin_unlock_irqrestore(&chip->reg_lock, flags); | ||
143 | |||
144 | if (hz == beep->hz && beep->volume == beep->volume_play) { | ||
145 | nsamples = beep->nsamples; | ||
146 | } else { | ||
147 | period = srate * 256 / hz; /* fixed point */ | ||
148 | ncycles = BEEP_BUFLEN * 256 / period; | ||
149 | nsamples = (period * ncycles) >> 8; | ||
150 | f = ncycles * 65536 / nsamples; | ||
151 | j = 0; | ||
152 | p = beep->buf; | ||
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; | ||
156 | } | ||
157 | beep->hz = hz; | ||
158 | beep->volume_play = beep->volume; | ||
159 | beep->nsamples = nsamples; | ||
160 | } | ||
161 | |||
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); | ||
165 | return 0; | ||
166 | } | ||
167 | |||
168 | /* | ||
169 | * beep volume mixer | ||
170 | */ | ||
171 | |||
172 | #define chip_t pmac_t | ||
173 | |||
174 | static int snd_pmac_info_beep(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo) | ||
175 | { | ||
176 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | ||
177 | uinfo->count = 1; | ||
178 | uinfo->value.integer.min = 0; | ||
179 | uinfo->value.integer.max = 100; | ||
180 | return 0; | ||
181 | } | ||
182 | |||
183 | static int snd_pmac_get_beep(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) | ||
184 | { | ||
185 | pmac_t *chip = snd_kcontrol_chip(kcontrol); | ||
186 | snd_assert(chip->beep, return -ENXIO); | ||
187 | ucontrol->value.integer.value[0] = chip->beep->volume; | ||
188 | return 0; | ||
189 | } | ||
190 | |||
191 | static int snd_pmac_put_beep(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) | ||
192 | { | ||
193 | pmac_t *chip = snd_kcontrol_chip(kcontrol); | ||
194 | int oval; | ||
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; | ||
199 | } | ||
200 | |||
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, | ||
207 | }; | ||
208 | |||
209 | /* Initialize beep stuff */ | ||
210 | int __init snd_pmac_attach_beep(pmac_t *chip) | ||
211 | { | ||
212 | pmac_beep_t *beep; | ||
213 | int err; | ||
214 | |||
215 | beep = kmalloc(sizeof(*beep), GFP_KERNEL); | ||
216 | if (! beep) | ||
217 | return -ENOMEM; | ||
218 | |||
219 | memset(beep, 0, sizeof(*beep)); | ||
220 | beep->buf = (short *) kmalloc(BEEP_BUFLEN * 4, GFP_KERNEL); | ||
221 | if (! beep->buf) { | ||
222 | kfree(beep); | ||
223 | return -ENOMEM; | ||
224 | } | ||
225 | beep->addr = virt_to_bus(beep->buf); | ||
226 | |||
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; | ||
231 | |||
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; | ||
239 | |||
240 | beep->volume = BEEP_VOLUME; | ||
241 | beep->running = 0; | ||
242 | if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_pmac_beep_mixer, chip))) < 0) { | ||
243 | kfree(beep->buf); | ||
244 | kfree(beep); | ||
245 | return err; | ||
246 | } | ||
247 | |||
248 | chip->beep = beep; | ||
249 | input_register_device(&beep->dev); | ||
250 | |||
251 | return 0; | ||
252 | } | ||
253 | |||
254 | void snd_pmac_detach_beep(pmac_t *chip) | ||
255 | { | ||
256 | if (chip->beep) { | ||
257 | input_unregister_device(&chip->beep->dev); | ||
258 | kfree(chip->beep->buf); | ||
259 | kfree(chip->beep); | ||
260 | chip->beep = NULL; | ||
261 | } | ||
262 | } | ||