1 #ifndef _dmasound_h_
2 /*
3 * linux/sound/oss/dmasound/dmasound.h
4 *
5 *
6 * Minor numbers for the sound driver.
7 *
8 * Unfortunately Creative called the codec chip of SB as a DSP. For this
9 * reason the /dev/dsp is reserved for digitized audio use. There is a
10 * device for true DSP processors but it will be called something else.
11 * In v3.0 it's /dev/sndproc but this could be a temporary solution.
12 */
13 #define _dmasound_h_
14
15 #include <linux/types.h>
16
17 #define SND_NDEVS 256 /* Number of supported devices */
18 #define SND_DEV_CTL 0 /* Control port /dev/mixer */
19 #define SND_DEV_SEQ 1 /* Sequencer output /dev/sequencer (FM
20 synthesizer and MIDI output) */
21 #define SND_DEV_MIDIN 2 /* Raw midi access */
22 #define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */
23 #define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */
24 #define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */
25 #define SND_DEV_STATUS 6 /* /dev/sndstat */
26 /* #7 not in use now. Was in 2.4. Free for use after v3.0. */
27 #define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */
28 #define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */
29 #define SND_DEV_PSS SND_DEV_SNDPROC
30
31 /* switch on various prinks */
32 #define DEBUG_DMASOUND 1
33
34 #define MAX_AUDIO_DEV 5
35 #define MAX_MIXER_DEV 4
36 #define MAX_SYNTH_DEV 3
37 #define MAX_MIDI_DEV 6
38 #define MAX_TIMER_DEV 3
39
40 #define MAX_CATCH_RADIUS 10
41
42 #define le2be16(x) (((x)<<8 & 0xff00) | ((x)>>8 & 0x00ff))
43 #define le2be16dbl(x) (((x)<<8 & 0xff00ff00) | ((x)>>8 & 0x00ff00ff))
44
45 #define IOCTL_IN(arg, ret) \
46 do { int error = get_user(ret, (int __user *)(arg)); \
47 if (error) return error; \
48 } while (0)
49 #define IOCTL_OUT(arg, ret) ioctl_return((int __user *)(arg), ret)
50
ioctl_return(int __user * addr,int value)51 static inline int ioctl_return(int __user *addr, int value)
52 {
53 return value < 0 ? value : put_user(value, addr);
54 }
55
56
57 /*
58 * Configuration
59 */
60
61 #undef HAS_8BIT_TABLES
62
63 #if defined(CONFIG_DMASOUND_ATARI) || defined(CONFIG_DMASOUND_ATARI_MODULE) ||\
64 defined(CONFIG_DMASOUND_PAULA) || defined(CONFIG_DMASOUND_PAULA_MODULE) ||\
65 defined(CONFIG_DMASOUND_Q40) || defined(CONFIG_DMASOUND_Q40_MODULE)
66 #define HAS_8BIT_TABLES
67 #define MIN_BUFFERS 4
68 #define MIN_BUFSIZE (1<<12) /* in bytes (- where does this come from ?) */
69 #define MIN_FRAG_SIZE 8 /* not 100% sure about this */
70 #define MAX_BUFSIZE (1<<17) /* Limit for Amiga is 128 kb */
71 #define MAX_FRAG_SIZE 15 /* allow *4 for mono-8 => stereo-16 (for multi) */
72
73 #else /* is pmac and multi is off */
74
75 #define MIN_BUFFERS 2
76 #define MIN_BUFSIZE (1<<8) /* in bytes */
77 #define MIN_FRAG_SIZE 8
78 #define MAX_BUFSIZE (1<<18) /* this is somewhat arbitrary for pmac */
79 #define MAX_FRAG_SIZE 16 /* need to allow *4 for mono-8 => stereo-16 */
80 #endif
81
82 #define DEFAULT_N_BUFFERS 4
83 #define DEFAULT_BUFF_SIZE (1<<15)
84
85 /*
86 * Initialization
87 */
88
89 extern int dmasound_init(void);
90 #ifdef MODULE
91 extern void dmasound_deinit(void);
92 #else
93 #define dmasound_deinit() do { } while (0)
94 #endif
95
96 /* description of the set-up applies to either hard or soft settings */
97
98 typedef struct {
99 int format; /* AFMT_* */
100 int stereo; /* 0 = mono, 1 = stereo */
101 int size; /* 8/16 bit*/
102 int speed; /* speed */
103 } SETTINGS;
104
105 /*
106 * Machine definitions
107 */
108
109 typedef struct {
110 const char *name;
111 const char *name2;
112 struct module *owner;
113 void *(*dma_alloc)(unsigned int, gfp_t);
114 void (*dma_free)(void *, unsigned int);
115 int (*irqinit)(void);
116 #ifdef MODULE
117 void (*irqcleanup)(void);
118 #endif
119 void (*init)(void);
120 void (*silence)(void);
121 int (*setFormat)(int);
122 int (*setVolume)(int);
123 int (*setBass)(int);
124 int (*setTreble)(int);
125 int (*setGain)(int);
126 void (*play)(void);
127 void (*record)(void); /* optional */
128 void (*mixer_init)(void); /* optional */
129 int (*mixer_ioctl)(u_int, u_long); /* optional */
130 int (*write_sq_setup)(void); /* optional */
131 int (*read_sq_setup)(void); /* optional */
132 int (*sq_open)(fmode_t); /* optional */
133 int (*state_info)(char *, size_t); /* optional */
134 void (*abort_read)(void); /* optional */
135 int min_dsp_speed;
136 int max_dsp_speed;
137 int version ;
138 int hardware_afmts ; /* OSS says we only return h'ware info */
139 /* when queried via SNDCTL_DSP_GETFMTS */
140 int capabilities ; /* low-level reply to SNDCTL_DSP_GETCAPS */
141 SETTINGS default_hard ; /* open() or init() should set something valid */
142 SETTINGS default_soft ; /* you can make it look like old OSS, if you want to */
143 } MACHINE;
144
145 /*
146 * Low level stuff
147 */
148
149 typedef struct {
150 ssize_t (*ct_ulaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
151 ssize_t (*ct_alaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
152 ssize_t (*ct_s8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
153 ssize_t (*ct_u8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
154 ssize_t (*ct_s16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
155 ssize_t (*ct_u16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
156 ssize_t (*ct_s16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
157 ssize_t (*ct_u16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
158 } TRANS;
159
160 struct sound_settings {
161 MACHINE mach; /* machine dependent things */
162 SETTINGS hard; /* hardware settings */
163 SETTINGS soft; /* software settings */
164 SETTINGS dsp; /* /dev/dsp default settings */
165 TRANS *trans_write; /* supported translations */
166 int volume_left; /* volume (range is machine dependent) */
167 int volume_right;
168 int bass; /* tone (range is machine dependent) */
169 int treble;
170 int gain;
171 int minDev; /* minor device number currently open */
172 spinlock_t lock;
173 };
174
175 extern struct sound_settings dmasound;
176
177 #ifdef HAS_8BIT_TABLES
178 extern char dmasound_ulaw2dma8[];
179 extern char dmasound_alaw2dma8[];
180 #endif
181
182 /*
183 * Mid level stuff
184 */
185
dmasound_set_volume(int volume)186 static inline int dmasound_set_volume(int volume)
187 {
188 return dmasound.mach.setVolume(volume);
189 }
190
dmasound_set_bass(int bass)191 static inline int dmasound_set_bass(int bass)
192 {
193 return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50;
194 }
195
dmasound_set_treble(int treble)196 static inline int dmasound_set_treble(int treble)
197 {
198 return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50;
199 }
200
dmasound_set_gain(int gain)201 static inline int dmasound_set_gain(int gain)
202 {
203 return dmasound.mach.setGain ? dmasound.mach.setGain(gain) : 100;
204 }
205
206
207 /*
208 * Sound queue stuff, the heart of the driver
209 */
210
211 struct sound_queue {
212 /* buffers allocated for this queue */
213 int numBufs; /* real limits on what the user can have */
214 int bufSize; /* in bytes */
215 char **buffers;
216
217 /* current parameters */
218 int locked ; /* params cannot be modified when != 0 */
219 int user_frags ; /* user requests this many */
220 int user_frag_size ; /* of this size */
221 int max_count; /* actual # fragments <= numBufs */
222 int block_size; /* internal block size in bytes */
223 int max_active; /* in-use fragments <= max_count */
224
225 /* it shouldn't be necessary to declare any of these volatile */
226 int front, rear, count;
227 int rear_size;
228 /*
229 * The use of the playing field depends on the hardware
230 *
231 * Atari, PMac: The number of frames that are loaded/playing
232 *
233 * Amiga: Bit 0 is set: a frame is loaded
234 * Bit 1 is set: a frame is playing
235 */
236 int active;
237 wait_queue_head_t action_queue, open_queue, sync_queue;
238 int non_blocking;
239 int busy, syncing, xruns, died;
240 };
241
242 #define WAKE_UP(queue) (wake_up_interruptible(&queue))
243
244 extern struct sound_queue dmasound_write_sq;
245 #define write_sq dmasound_write_sq
246
247 extern int dmasound_catchRadius;
248 #define catchRadius dmasound_catchRadius
249
250 /* define the value to be put in the byte-swap reg in mac-io
251 when we want it to swap for us.
252 */
253 #define BS_VAL 1
254
255 #define SW_INPUT_VOLUME_SCALE 4
256 #define SW_INPUT_VOLUME_DEFAULT (128 / SW_INPUT_VOLUME_SCALE)
257
258 extern int expand_read_bal; /* Balance factor for reading */
259 extern uint software_input_volume; /* software implemented recording volume! */
260
261 #endif /* _dmasound_h_ */
262