aboutsummaryrefslogtreecommitdiff
path: root/sound/oss/dmasound/dmasound.h
blob: 1cb13fe56ec46fa617e19fa98c5f46a5034e9e45 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
#ifndef _dmasound_h_
/*
 *  linux/sound/oss/dmasound/dmasound.h
 *
 *
 *  Minor numbers for the sound driver.
 *
 *  Unfortunately Creative called the codec chip of SB as a DSP. For this
 *  reason the /dev/dsp is reserved for digitized audio use. There is a
 *  device for true DSP processors but it will be called something else.
 *  In v3.0 it's /dev/sndproc but this could be a temporary solution.
 */
#define _dmasound_h_

#include <linux/types.h>

#define SND_NDEVS	256	/* Number of supported devices */
#define SND_DEV_CTL	0	/* Control port /dev/mixer */
#define SND_DEV_SEQ	1	/* Sequencer output /dev/sequencer (FM
				   synthesizer and MIDI output) */
#define SND_DEV_MIDIN	2	/* Raw midi access */
#define SND_DEV_DSP	3	/* Digitized voice /dev/dsp */
#define SND_DEV_AUDIO	4	/* Sparc compatible /dev/audio */
#define SND_DEV_DSP16	5	/* Like /dev/dsp but 16 bits/sample */
#define SND_DEV_STATUS	6	/* /dev/sndstat */
/* #7 not in use now. Was in 2.4. Free for use after v3.0. */
#define SND_DEV_SEQ2	8	/* /dev/sequencer, level 2 interface */
#define SND_DEV_SNDPROC 9	/* /dev/sndproc for programmable devices */
#define SND_DEV_PSS	SND_DEV_SNDPROC

/* switch on various prinks */
#define DEBUG_DMASOUND 1

#define MAX_AUDIO_DEV	5
#define MAX_MIXER_DEV	4
#define MAX_SYNTH_DEV	3
#define MAX_MIDI_DEV	6
#define MAX_TIMER_DEV	3

#define MAX_CATCH_RADIUS	10

#define le2be16(x)	(((x)<<8 & 0xff00) | ((x)>>8 & 0x00ff))
#define le2be16dbl(x)	(((x)<<8 & 0xff00ff00) | ((x)>>8 & 0x00ff00ff))

#define IOCTL_IN(arg, ret) \
	do { int error = get_user(ret, (int __user *)(arg)); \
		if (error) return error; \
	} while (0)
#define IOCTL_OUT(arg, ret)	ioctl_return((int __user *)(arg), ret)

static inline int ioctl_return(int __user *addr, int value)
{
	return value < 0 ? value : put_user(value, addr);
}


    /*
     *  Configuration
     */

#undef HAS_8BIT_TABLES

#if defined(CONFIG_DMASOUND_ATARI) || defined(CONFIG_DMASOUND_ATARI_MODULE) ||\
    defined(CONFIG_DMASOUND_PAULA) || defined(CONFIG_DMASOUND_PAULA_MODULE) ||\
    defined(CONFIG_DMASOUND_Q40) || defined(CONFIG_DMASOUND_Q40_MODULE)
#define HAS_8BIT_TABLES
#define MIN_BUFFERS	4
#define MIN_BUFSIZE	(1<<12)	/* in bytes (- where does this come from ?) */
#define MIN_FRAG_SIZE	8	/* not 100% sure about this */
#define MAX_BUFSIZE	(1<<17)	/* Limit for Amiga is 128 kb */
#define MAX_FRAG_SIZE	15	/* allow *4 for mono-8 => stereo-16 (for multi) */

#else /* is pmac and multi is off */

#define MIN_BUFFERS	2
#define MIN_BUFSIZE	(1<<8)	/* in bytes */
#define MIN_FRAG_SIZE	8
#define MAX_BUFSIZE	(1<<18)	/* this is somewhat arbitrary for pmac */
#define MAX_FRAG_SIZE	16	/* need to allow *4 for mono-8 => stereo-16 */
#endif

#define DEFAULT_N_BUFFERS 4
#define DEFAULT_BUFF_SIZE (1<<15)

    /*
     *  Initialization
     */

extern int dmasound_init(void);
#ifdef MODULE
extern void dmasound_deinit(void);
#else
#define dmasound_deinit()	do { } while (0)
#endif

/* description of the set-up applies to either hard or soft settings */

typedef struct {
    int format;		/* AFMT_* */
    int stereo;		/* 0 = mono, 1 = stereo */
    int size;		/* 8/16 bit*/
    int speed;		/* speed */
} SETTINGS;

    /*
     *  Machine definitions
     */

typedef struct {
    const char *name;
    const char *name2;
    struct module *owner;
    void *(*dma_alloc)(unsigned int, gfp_t);
    void (*dma_free)(void *, unsigned int);
    int (*irqinit)(void);
#ifdef MODULE
    void (*irqcleanup)(void);
#endif
    void (*init)(void);
    void (*silence)(void);
    int (*setFormat)(int);
    int (*setVolume)(int);
    int (*setBass)(int);
    int (*setTreble)(int);
    int (*setGain)(int);
    void (*play)(void);
    void (*record)(void);		/* optional */
    void (*mixer_init)(void);		/* optional */
    int (*mixer_ioctl)(u_int, u_long);	/* optional */
    int (*write_sq_setup)(void);	/* optional */
    int (*read_sq_setup)(void);		/* optional */
    int (*sq_open)(fmode_t);		/* optional */
    int (*state_info)(char *, size_t);	/* optional */
    void (*abort_read)(void);		/* optional */
    int min_dsp_speed;
    int max_dsp_speed;
    int version ;
    int hardware_afmts ;		/* OSS says we only return h'ware info */
					/* when queried via SNDCTL_DSP_GETFMTS */
    int capabilities ;		/* low-level reply to SNDCTL_DSP_GETCAPS */
    SETTINGS default_hard ;	/* open() or init() should set something valid */
    SETTINGS default_soft ;	/* you can make it look like old OSS, if you want to */
} MACHINE;

    /*
     *  Low level stuff
     */

typedef struct {
    ssize_t (*ct_ulaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    ssize_t (*ct_alaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    ssize_t (*ct_s8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    ssize_t (*ct_u8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    ssize_t (*ct_s16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    ssize_t (*ct_u16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    ssize_t (*ct_s16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    ssize_t (*ct_u16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
} TRANS;

struct sound_settings {
    MACHINE mach;	/* machine dependent things */
    SETTINGS hard;	/* hardware settings */
    SETTINGS soft;	/* software settings */
    SETTINGS dsp;	/* /dev/dsp default settings */
    TRANS *trans_write;	/* supported translations */
    int volume_left;	/* volume (range is machine dependent) */
    int volume_right;
    int bass;		/* tone (range is machine dependent) */
    int treble;
    int gain;
    int minDev;		/* minor device number currently open */
    spinlock_t lock;
};

extern struct sound_settings dmasound;

#ifdef HAS_8BIT_TABLES
extern char dmasound_ulaw2dma8[];
extern char dmasound_alaw2dma8[];
#endif

    /*
     *  Mid level stuff
     */

static inline int dmasound_set_volume(int volume)
{
	return dmasound.mach.setVolume(volume);
}

static inline int dmasound_set_bass(int bass)
{
	return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50;
}

static inline int dmasound_set_treble(int treble)
{
	return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50;
}

static inline int dmasound_set_gain(int gain)
{
	return dmasound.mach.setGain ? dmasound.mach.setGain(gain) : 100;
}


    /*
     * Sound queue stuff, the heart of the driver
     */

struct sound_queue {
    /* buffers allocated for this queue */
    int numBufs;		/* real limits on what the user can have */
    int bufSize;		/* in bytes */
    char **buffers;

    /* current parameters */
    int locked ;		/* params cannot be modified when != 0 */
    int user_frags ;		/* user requests this many */
    int user_frag_size ;	/* of this size */
    int max_count;		/* actual # fragments <= numBufs */
    int block_size;		/* internal block size in bytes */
    int max_active;		/* in-use fragments <= max_count */

    /* it shouldn't be necessary to declare any of these volatile */
    int front, rear, count;
    int rear_size;
    /*
     *	The use of the playing field depends on the hardware
     *
     *	Atari, PMac: The number of frames that are loaded/playing
     *
     *	Amiga: Bit 0 is set: a frame is loaded
     *	       Bit 1 is set: a frame is playing
     */
    int active;
    wait_queue_head_t action_queue, open_queue, sync_queue;
    fmode_t open_mode;
    int busy, syncing, xruns, died;
};

#define SLEEP(queue)		interruptible_sleep_on_timeout(&queue, HZ)
#define WAKE_UP(queue)		(wake_up_interruptible(&queue))

extern struct sound_queue dmasound_write_sq;
#define write_sq	dmasound_write_sq

extern int dmasound_catchRadius;
#define catchRadius	dmasound_catchRadius

/* define the value to be put in the byte-swap reg in mac-io
   when we want it to swap for us.
*/
#define BS_VAL 1

#define SW_INPUT_VOLUME_SCALE	4
#define SW_INPUT_VOLUME_DEFAULT	(128 / SW_INPUT_VOLUME_SCALE)

extern int expand_read_bal;	/* Balance factor for reading */
extern uint software_input_volume; /* software implemented recording volume! */

#endif /* _dmasound_h_ */