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Linux/sound/oss/dmasound/dmasound.h

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  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 
 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 
186 static inline int dmasound_set_volume(int volume)
187 {
188         return dmasound.mach.setVolume(volume);
189 }
190 
191 static inline int dmasound_set_bass(int bass)
192 {
193         return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50;
194 }
195 
196 static inline int dmasound_set_treble(int treble)
197 {
198         return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50;
199 }
200 
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 SLEEP(queue)            interruptible_sleep_on_timeout(&queue, HZ)
243 #define WAKE_UP(queue)          (wake_up_interruptible(&queue))
244 
245 extern struct sound_queue dmasound_write_sq;
246 #define write_sq        dmasound_write_sq
247 
248 extern int dmasound_catchRadius;
249 #define catchRadius     dmasound_catchRadius
250 
251 /* define the value to be put in the byte-swap reg in mac-io
252    when we want it to swap for us.
253 */
254 #define BS_VAL 1
255 
256 #define SW_INPUT_VOLUME_SCALE   4
257 #define SW_INPUT_VOLUME_DEFAULT (128 / SW_INPUT_VOLUME_SCALE)
258 
259 extern int expand_read_bal;     /* Balance factor for reading */
260 extern uint software_input_volume; /* software implemented recording volume! */
261 
262 #endif /* _dmasound_h_ */
263 

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