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7
8#include <linux/io.h>
9#include <asm/irq.h>
10#include <linux/init.h>
11#include <linux/slab.h>
12#include <linux/input.h>
13#include <linux/pci.h>
14#include <linux/dma-mapping.h>
15#include <sound/core.h>
16#include <sound/control.h>
17#include "pmac.h"
18
19struct pmac_beep {
20 int running;
21 int volume;
22 int volume_play;
23 int hz;
24 int nsamples;
25 short *buf;
26 dma_addr_t addr;
27 struct input_dev *dev;
28};
29
30
31
32
33void snd_pmac_beep_stop(struct snd_pmac *chip)
34{
35 struct pmac_beep *beep = chip->beep;
36 if (beep && beep->running) {
37 beep->running = 0;
38 snd_pmac_beep_dma_stop(chip);
39 }
40}
41
42
43
44
45
46
47static short beep_wform[256] = {
48 0, 40, 79, 117, 153, 187, 218, 245,
49 269, 288, 304, 316, 323, 327, 327, 324,
50 318, 310, 299, 288, 275, 262, 249, 236,
51 224, 213, 204, 196, 190, 186, 183, 182,
52 182, 183, 186, 189, 192, 196, 200, 203,
53 206, 208, 209, 209, 209, 207, 204, 201,
54 197, 193, 188, 183, 179, 174, 170, 166,
55 163, 161, 160, 159, 159, 160, 161, 162,
56 164, 166, 168, 169, 171, 171, 171, 170,
57 169, 167, 163, 159, 155, 150, 144, 139,
58 133, 128, 122, 117, 113, 110, 107, 105,
59 103, 103, 103, 103, 104, 104, 105, 105,
60 105, 103, 101, 97, 92, 86, 78, 68,
61 58, 45, 32, 18, 3, -11, -26, -41,
62 -55, -68, -79, -88, -95, -100, -102, -102,
63 -99, -93, -85, -75, -62, -48, -33, -16,
64 0, 16, 33, 48, 62, 75, 85, 93,
65 99, 102, 102, 100, 95, 88, 79, 68,
66 55, 41, 26, 11, -3, -18, -32, -45,
67 -58, -68, -78, -86, -92, -97, -101, -103,
68 -105, -105, -105, -104, -104, -103, -103, -103,
69 -103, -105, -107, -110, -113, -117, -122, -128,
70 -133, -139, -144, -150, -155, -159, -163, -167,
71 -169, -170, -171, -171, -171, -169, -168, -166,
72 -164, -162, -161, -160, -159, -159, -160, -161,
73 -163, -166, -170, -174, -179, -183, -188, -193,
74 -197, -201, -204, -207, -209, -209, -209, -208,
75 -206, -203, -200, -196, -192, -189, -186, -183,
76 -182, -182, -183, -186, -190, -196, -204, -213,
77 -224, -236, -249, -262, -275, -288, -299, -310,
78 -318, -324, -327, -327, -323, -316, -304, -288,
79 -269, -245, -218, -187, -153, -117, -79, -40,
80};
81
82#define BEEP_SRATE 22050
83#define BEEP_BUFLEN 512
84#define BEEP_VOLUME 15
85
86static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type,
87 unsigned int code, int hz)
88{
89 struct snd_pmac *chip;
90 struct pmac_beep *beep;
91 unsigned long flags;
92 int beep_speed = 0;
93 int srate;
94 int period, ncycles, nsamples;
95 int i, j, f;
96 short *p;
97
98 if (type != EV_SND)
99 return -1;
100
101 switch (code) {
102 case SND_BELL: if (hz) hz = 1000;
103 case SND_TONE: break;
104 default: return -1;
105 }
106
107 chip = input_get_drvdata(dev);
108 if (! chip || (beep = chip->beep) == NULL)
109 return -1;
110
111 if (! hz) {
112 spin_lock_irqsave(&chip->reg_lock, flags);
113 if (beep->running)
114 snd_pmac_beep_stop(chip);
115 spin_unlock_irqrestore(&chip->reg_lock, flags);
116 return 0;
117 }
118
119 beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE);
120 srate = chip->freq_table[beep_speed];
121
122 if (hz <= srate / BEEP_BUFLEN || hz > srate / 2)
123 hz = 1000;
124
125 spin_lock_irqsave(&chip->reg_lock, flags);
126 if (chip->playback.running || chip->capture.running || beep->running) {
127 spin_unlock_irqrestore(&chip->reg_lock, flags);
128 return 0;
129 }
130 beep->running = 1;
131 spin_unlock_irqrestore(&chip->reg_lock, flags);
132
133 if (hz == beep->hz && beep->volume == beep->volume_play) {
134 nsamples = beep->nsamples;
135 } else {
136 period = srate * 256 / hz;
137 ncycles = BEEP_BUFLEN * 256 / period;
138 nsamples = (period * ncycles) >> 8;
139 f = ncycles * 65536 / nsamples;
140 j = 0;
141 p = beep->buf;
142 for (i = 0; i < nsamples; ++i, p += 2) {
143 p[0] = p[1] = beep_wform[j >> 8] * beep->volume;
144 j = (j + f) & 0xffff;
145 }
146 beep->hz = hz;
147 beep->volume_play = beep->volume;
148 beep->nsamples = nsamples;
149 }
150
151 spin_lock_irqsave(&chip->reg_lock, flags);
152 snd_pmac_beep_dma_start(chip, beep->nsamples * 4, beep->addr, beep_speed);
153 spin_unlock_irqrestore(&chip->reg_lock, flags);
154 return 0;
155}
156
157
158
159
160
161static int snd_pmac_info_beep(struct snd_kcontrol *kcontrol,
162 struct snd_ctl_elem_info *uinfo)
163{
164 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
165 uinfo->count = 1;
166 uinfo->value.integer.min = 0;
167 uinfo->value.integer.max = 100;
168 return 0;
169}
170
171static int snd_pmac_get_beep(struct snd_kcontrol *kcontrol,
172 struct snd_ctl_elem_value *ucontrol)
173{
174 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
175 if (snd_BUG_ON(!chip->beep))
176 return -ENXIO;
177 ucontrol->value.integer.value[0] = chip->beep->volume;
178 return 0;
179}
180
181static int snd_pmac_put_beep(struct snd_kcontrol *kcontrol,
182 struct snd_ctl_elem_value *ucontrol)
183{
184 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
185 unsigned int oval, nval;
186 if (snd_BUG_ON(!chip->beep))
187 return -ENXIO;
188 oval = chip->beep->volume;
189 nval = ucontrol->value.integer.value[0];
190 if (nval > 100)
191 return -EINVAL;
192 chip->beep->volume = nval;
193 return oval != chip->beep->volume;
194}
195
196static const struct snd_kcontrol_new snd_pmac_beep_mixer = {
197 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
198 .name = "Beep Playback Volume",
199 .info = snd_pmac_info_beep,
200 .get = snd_pmac_get_beep,
201 .put = snd_pmac_put_beep,
202};
203
204
205int snd_pmac_attach_beep(struct snd_pmac *chip)
206{
207 struct pmac_beep *beep;
208 struct input_dev *input_dev;
209 struct snd_kcontrol *beep_ctl;
210 void *dmabuf;
211 int err = -ENOMEM;
212
213 beep = kzalloc(sizeof(*beep), GFP_KERNEL);
214 if (! beep)
215 return -ENOMEM;
216 dmabuf = dma_alloc_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
217 &beep->addr, GFP_KERNEL);
218 input_dev = input_allocate_device();
219 if (! dmabuf || ! input_dev)
220 goto fail1;
221
222
223 input_dev->name = "PowerMac Beep";
224 input_dev->phys = "powermac/beep";
225 input_dev->id.bustype = BUS_ADB;
226 input_dev->id.vendor = 0x001f;
227 input_dev->id.product = 0x0001;
228 input_dev->id.version = 0x0100;
229
230 input_dev->evbit[0] = BIT_MASK(EV_SND);
231 input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
232 input_dev->event = snd_pmac_beep_event;
233 input_dev->dev.parent = &chip->pdev->dev;
234 input_set_drvdata(input_dev, chip);
235
236 beep->dev = input_dev;
237 beep->buf = dmabuf;
238 beep->volume = BEEP_VOLUME;
239 beep->running = 0;
240
241 beep_ctl = snd_ctl_new1(&snd_pmac_beep_mixer, chip);
242 err = snd_ctl_add(chip->card, beep_ctl);
243 if (err < 0)
244 goto fail1;
245
246 chip->beep = beep;
247
248 err = input_register_device(beep->dev);
249 if (err)
250 goto fail2;
251
252 return 0;
253
254 fail2: snd_ctl_remove(chip->card, beep_ctl);
255 fail1: input_free_device(input_dev);
256 if (dmabuf)
257 dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
258 dmabuf, beep->addr);
259 kfree(beep);
260 return err;
261}
262
263void snd_pmac_detach_beep(struct snd_pmac *chip)
264{
265 if (chip->beep) {
266 input_unregister_device(chip->beep->dev);
267 dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
268 chip->beep->buf, chip->beep->addr);
269 kfree(chip->beep);
270 chip->beep = NULL;
271 }
272}
273
