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 | ||
1da177e4 LT |
21 | #include <asm/io.h> |
22 | #include <asm/irq.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/input.h> | |
7bbd8277 BH |
26 | #include <linux/pci.h> |
27 | #include <linux/dma-mapping.h> | |
1da177e4 LT |
28 | #include <sound/core.h> |
29 | #include <sound/control.h> | |
30 | #include "pmac.h" | |
31 | ||
65b29f50 | 32 | struct pmac_beep { |
5ebdcbc2 DT |
33 | int running; /* boolean */ |
34 | int volume; /* mixer volume: 0-100 */ | |
1da177e4 LT |
35 | int volume_play; /* currently playing volume */ |
36 | int hz; | |
37 | int nsamples; | |
38 | short *buf; /* allocated wave buffer */ | |
7bbd8277 | 39 | dma_addr_t addr; /* physical address of buffer */ |
5ebdcbc2 | 40 | struct input_dev *dev; |
1da177e4 LT |
41 | }; |
42 | ||
43 | /* | |
44 | * stop beep if running | |
45 | */ | |
65b29f50 | 46 | void snd_pmac_beep_stop(struct snd_pmac *chip) |
1da177e4 | 47 | { |
65b29f50 | 48 | struct pmac_beep *beep = chip->beep; |
1da177e4 LT |
49 | if (beep && beep->running) { |
50 | beep->running = 0; | |
51 | snd_pmac_beep_dma_stop(chip); | |
52 | } | |
53 | } | |
54 | ||
55 | /* | |
56 | * Stuff for outputting a beep. The values range from -327 to +327 | |
57 | * so we can multiply by an amplitude in the range 0..100 to get a | |
58 | * signed short value to put in the output buffer. | |
59 | */ | |
60 | static short beep_wform[256] = { | |
61 | 0, 40, 79, 117, 153, 187, 218, 245, | |
62 | 269, 288, 304, 316, 323, 327, 327, 324, | |
63 | 318, 310, 299, 288, 275, 262, 249, 236, | |
64 | 224, 213, 204, 196, 190, 186, 183, 182, | |
65 | 182, 183, 186, 189, 192, 196, 200, 203, | |
66 | 206, 208, 209, 209, 209, 207, 204, 201, | |
67 | 197, 193, 188, 183, 179, 174, 170, 166, | |
68 | 163, 161, 160, 159, 159, 160, 161, 162, | |
69 | 164, 166, 168, 169, 171, 171, 171, 170, | |
70 | 169, 167, 163, 159, 155, 150, 144, 139, | |
71 | 133, 128, 122, 117, 113, 110, 107, 105, | |
72 | 103, 103, 103, 103, 104, 104, 105, 105, | |
73 | 105, 103, 101, 97, 92, 86, 78, 68, | |
74 | 58, 45, 32, 18, 3, -11, -26, -41, | |
75 | -55, -68, -79, -88, -95, -100, -102, -102, | |
76 | -99, -93, -85, -75, -62, -48, -33, -16, | |
77 | 0, 16, 33, 48, 62, 75, 85, 93, | |
78 | 99, 102, 102, 100, 95, 88, 79, 68, | |
79 | 55, 41, 26, 11, -3, -18, -32, -45, | |
80 | -58, -68, -78, -86, -92, -97, -101, -103, | |
81 | -105, -105, -105, -104, -104, -103, -103, -103, | |
82 | -103, -105, -107, -110, -113, -117, -122, -128, | |
83 | -133, -139, -144, -150, -155, -159, -163, -167, | |
84 | -169, -170, -171, -171, -171, -169, -168, -166, | |
85 | -164, -162, -161, -160, -159, -159, -160, -161, | |
86 | -163, -166, -170, -174, -179, -183, -188, -193, | |
87 | -197, -201, -204, -207, -209, -209, -209, -208, | |
88 | -206, -203, -200, -196, -192, -189, -186, -183, | |
89 | -182, -182, -183, -186, -190, -196, -204, -213, | |
90 | -224, -236, -249, -262, -275, -288, -299, -310, | |
91 | -318, -324, -327, -327, -323, -316, -304, -288, | |
92 | -269, -245, -218, -187, -153, -117, -79, -40, | |
93 | }; | |
94 | ||
95 | #define BEEP_SRATE 22050 /* 22050 Hz sample rate */ | |
96 | #define BEEP_BUFLEN 512 | |
97 | #define BEEP_VOLUME 15 /* 0 - 100 */ | |
98 | ||
65b29f50 TI |
99 | static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type, |
100 | unsigned int code, int hz) | |
1da177e4 | 101 | { |
65b29f50 TI |
102 | struct snd_pmac *chip; |
103 | struct pmac_beep *beep; | |
1da177e4 LT |
104 | unsigned long flags; |
105 | int beep_speed = 0; | |
106 | int srate; | |
107 | int period, ncycles, nsamples; | |
108 | int i, j, f; | |
109 | short *p; | |
110 | ||
111 | if (type != EV_SND) | |
112 | return -1; | |
113 | ||
114 | switch (code) { | |
115 | case SND_BELL: if (hz) hz = 1000; | |
116 | case SND_TONE: break; | |
117 | default: return -1; | |
118 | } | |
119 | ||
1e2831db | 120 | chip = input_get_drvdata(dev); |
1da177e4 LT |
121 | if (! chip || (beep = chip->beep) == NULL) |
122 | return -1; | |
123 | ||
124 | if (! hz) { | |
125 | spin_lock_irqsave(&chip->reg_lock, flags); | |
126 | if (beep->running) | |
127 | snd_pmac_beep_stop(chip); | |
128 | spin_unlock_irqrestore(&chip->reg_lock, flags); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE); | |
133 | srate = chip->freq_table[beep_speed]; | |
134 | ||
135 | if (hz <= srate / BEEP_BUFLEN || hz > srate / 2) | |
136 | hz = 1000; | |
137 | ||
138 | spin_lock_irqsave(&chip->reg_lock, flags); | |
139 | if (chip->playback.running || chip->capture.running || beep->running) { | |
140 | spin_unlock_irqrestore(&chip->reg_lock, flags); | |
141 | return 0; | |
142 | } | |
143 | beep->running = 1; | |
144 | spin_unlock_irqrestore(&chip->reg_lock, flags); | |
145 | ||
146 | if (hz == beep->hz && beep->volume == beep->volume_play) { | |
147 | nsamples = beep->nsamples; | |
148 | } else { | |
149 | period = srate * 256 / hz; /* fixed point */ | |
150 | ncycles = BEEP_BUFLEN * 256 / period; | |
151 | nsamples = (period * ncycles) >> 8; | |
152 | f = ncycles * 65536 / nsamples; | |
153 | j = 0; | |
154 | p = beep->buf; | |
155 | for (i = 0; i < nsamples; ++i, p += 2) { | |
156 | p[0] = p[1] = beep_wform[j >> 8] * beep->volume; | |
157 | j = (j + f) & 0xffff; | |
158 | } | |
159 | beep->hz = hz; | |
160 | beep->volume_play = beep->volume; | |
161 | beep->nsamples = nsamples; | |
162 | } | |
163 | ||
164 | spin_lock_irqsave(&chip->reg_lock, flags); | |
165 | snd_pmac_beep_dma_start(chip, beep->nsamples * 4, beep->addr, beep_speed); | |
166 | spin_unlock_irqrestore(&chip->reg_lock, flags); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | /* | |
171 | * beep volume mixer | |
172 | */ | |
173 | ||
65b29f50 TI |
174 | static int snd_pmac_info_beep(struct snd_kcontrol *kcontrol, |
175 | struct snd_ctl_elem_info *uinfo) | |
1da177e4 LT |
176 | { |
177 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
178 | uinfo->count = 1; | |
179 | uinfo->value.integer.min = 0; | |
180 | uinfo->value.integer.max = 100; | |
181 | return 0; | |
182 | } | |
183 | ||
65b29f50 TI |
184 | static int snd_pmac_get_beep(struct snd_kcontrol *kcontrol, |
185 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 186 | { |
65b29f50 | 187 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
5e246b85 TI |
188 | if (snd_BUG_ON(!chip->beep)) |
189 | return -ENXIO; | |
1da177e4 LT |
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); |
d4079ac4 | 198 | unsigned int oval, nval; |
5e246b85 TI |
199 | if (snd_BUG_ON(!chip->beep)) |
200 | return -ENXIO; | |
1da177e4 | 201 | oval = chip->beep->volume; |
d4079ac4 TI |
202 | nval = ucontrol->value.integer.value[0]; |
203 | if (nval > 100) | |
204 | return -EINVAL; | |
205 | chip->beep->volume = nval; | |
1da177e4 LT |
206 | return oval != chip->beep->volume; |
207 | } | |
208 | ||
65b29f50 | 209 | static struct snd_kcontrol_new snd_pmac_beep_mixer = { |
1da177e4 LT |
210 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
211 | .name = "Beep Playback Volume", | |
212 | .info = snd_pmac_info_beep, | |
213 | .get = snd_pmac_get_beep, | |
214 | .put = snd_pmac_put_beep, | |
215 | }; | |
216 | ||
217 | /* Initialize beep stuff */ | |
15afafc2 | 218 | int snd_pmac_attach_beep(struct snd_pmac *chip) |
1da177e4 | 219 | { |
65b29f50 | 220 | struct pmac_beep *beep; |
5ebdcbc2 | 221 | struct input_dev *input_dev; |
f03d68fe | 222 | struct snd_kcontrol *beep_ctl; |
5ebdcbc2 DT |
223 | void *dmabuf; |
224 | int err = -ENOMEM; | |
1da177e4 | 225 | |
5ebdcbc2 | 226 | beep = kzalloc(sizeof(*beep), GFP_KERNEL); |
f03d68fe DT |
227 | if (! beep) |
228 | return -ENOMEM; | |
5ebdcbc2 DT |
229 | dmabuf = dma_alloc_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4, |
230 | &beep->addr, GFP_KERNEL); | |
231 | input_dev = input_allocate_device(); | |
f03d68fe DT |
232 | if (! dmabuf || ! input_dev) |
233 | goto fail1; | |
1da177e4 LT |
234 | |
235 | /* FIXME: set more better values */ | |
5ebdcbc2 DT |
236 | input_dev->name = "PowerMac Beep"; |
237 | input_dev->phys = "powermac/beep"; | |
238 | input_dev->id.bustype = BUS_ADB; | |
239 | input_dev->id.vendor = 0x001f; | |
240 | input_dev->id.product = 0x0001; | |
241 | input_dev->id.version = 0x0100; | |
242 | ||
7b19ada2 JS |
243 | input_dev->evbit[0] = BIT_MASK(EV_SND); |
244 | input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE); | |
5ebdcbc2 | 245 | input_dev->event = snd_pmac_beep_event; |
1e2831db DT |
246 | input_dev->dev.parent = &chip->pdev->dev; |
247 | input_set_drvdata(input_dev, chip); | |
1da177e4 | 248 | |
5ebdcbc2 DT |
249 | beep->dev = input_dev; |
250 | beep->buf = dmabuf; | |
1da177e4 LT |
251 | beep->volume = BEEP_VOLUME; |
252 | beep->running = 0; | |
5ebdcbc2 | 253 | |
f03d68fe DT |
254 | beep_ctl = snd_ctl_new1(&snd_pmac_beep_mixer, chip); |
255 | err = snd_ctl_add(chip->card, beep_ctl); | |
5ebdcbc2 | 256 | if (err < 0) |
f03d68fe | 257 | goto fail1; |
1e2831db DT |
258 | |
259 | chip->beep = beep; | |
1da177e4 | 260 | |
f03d68fe DT |
261 | err = input_register_device(beep->dev); |
262 | if (err) | |
263 | goto fail2; | |
264 | ||
265 | return 0; | |
266 | ||
267 | fail2: snd_ctl_remove(chip->card, beep_ctl); | |
268 | fail1: input_free_device(input_dev); | |
269 | if (dmabuf) | |
270 | dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4, | |
271 | dmabuf, beep->addr); | |
5ebdcbc2 DT |
272 | kfree(beep); |
273 | return err; | |
1da177e4 LT |
274 | } |
275 | ||
65b29f50 | 276 | void snd_pmac_detach_beep(struct snd_pmac *chip) |
1da177e4 LT |
277 | { |
278 | if (chip->beep) { | |
5ebdcbc2 | 279 | input_unregister_device(chip->beep->dev); |
7bbd8277 BH |
280 | dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4, |
281 | chip->beep->buf, chip->beep->addr); | |
1da177e4 LT |
282 | kfree(chip->beep); |
283 | chip->beep = NULL; | |
284 | } | |
285 | } |