1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _dmasound_h_ 3 /* 4 * linux/sound/oss/dmasound/dmasound.h 5 * 6 * 7 * Minor numbers for the sound driver. 8 * 9 * Unfortunately Creative called the codec chip of SB as a DSP. For this 10 * reason the /dev/dsp is reserved for digitized audio use. There is a 11 * device for true DSP processors but it will be called something else. 12 * In v3.0 it's /dev/sndproc but this could be a temporary solution. 13 */ 14 #define _dmasound_h_ 15 16 #include <linux/types.h> 17 18 #define SND_NDEVS 256 /* Number of supported devices */ 19 #define SND_DEV_CTL 0 /* Control port /dev/mixer */ 20 #define SND_DEV_SEQ 1 /* Sequencer output /dev/sequencer (FM 21 synthesizer and MIDI output) */ 22 #define SND_DEV_MIDIN 2 /* Raw midi access */ 23 #define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */ 24 #define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */ 25 #define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */ 26 #define SND_DEV_STATUS 6 /* /dev/sndstat */ 27 /* #7 not in use now. Was in 2.4. Free for use after v3.0. */ 28 #define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */ 29 #define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */ 30 #define SND_DEV_PSS SND_DEV_SNDPROC 31 32 /* switch on various prinks */ 33 #define DEBUG_DMASOUND 1 34 35 #define MAX_AUDIO_DEV 5 36 #define MAX_MIXER_DEV 4 37 #define MAX_SYNTH_DEV 3 38 #define MAX_MIDI_DEV 6 39 #define MAX_TIMER_DEV 3 40 41 #define MAX_CATCH_RADIUS 10 42 43 #define le2be16(x) (((x)<<8 & 0xff00) | ((x)>>8 & 0x00ff)) 44 #define le2be16dbl(x) (((x)<<8 & 0xff00ff00) | ((x)>>8 & 0x00ff00ff)) 45 46 #define IOCTL_IN(arg, ret) \ 47 do { int error = get_user(ret, (int __user *)(arg)); \ 48 if (error) return error; \ 49 } while (0) 50 #define IOCTL_OUT(arg, ret) ioctl_return((int __user *)(arg), ret) 51 52 static inline int ioctl_return(int __user *addr, int value) 53 { 54 return value < 0 ? value : put_user(value, addr); 55 } 56 57 58 /* 59 * Configuration 60 */ 61 62 #undef HAS_8BIT_TABLES 63 64 #if defined(CONFIG_DMASOUND_ATARI) || defined(CONFIG_DMASOUND_ATARI_MODULE) ||\ 65 defined(CONFIG_DMASOUND_PAULA) || defined(CONFIG_DMASOUND_PAULA_MODULE) ||\ 66 defined(CONFIG_DMASOUND_Q40) || defined(CONFIG_DMASOUND_Q40_MODULE) 67 #define HAS_8BIT_TABLES 68 #define MIN_BUFFERS 4 69 #define MIN_BUFSIZE (1<<12) /* in bytes (- where does this come from ?) */ 70 #define MIN_FRAG_SIZE 8 /* not 100% sure about this */ 71 #define MAX_BUFSIZE (1<<17) /* Limit for Amiga is 128 kb */ 72 #define MAX_FRAG_SIZE 15 /* allow *4 for mono-8 => stereo-16 (for multi) */ 73 74 #else /* is pmac and multi is off */ 75 76 #define MIN_BUFFERS 2 77 #define MIN_BUFSIZE (1<<8) /* in bytes */ 78 #define MIN_FRAG_SIZE 8 79 #define MAX_BUFSIZE (1<<18) /* this is somewhat arbitrary for pmac */ 80 #define MAX_FRAG_SIZE 16 /* need to allow *4 for mono-8 => stereo-16 */ 81 #endif 82 83 #define DEFAULT_N_BUFFERS 4 84 #define DEFAULT_BUFF_SIZE (1<<15) 85 86 /* 87 * Initialization 88 */ 89 90 extern int dmasound_init(void); 91 extern void dmasound_deinit(void); 92 93 /* description of the set-up applies to either hard or soft settings */ 94 95 typedef struct { 96 int format; /* AFMT_* */ 97 int stereo; /* 0 = mono, 1 = stereo */ 98 int size; /* 8/16 bit*/ 99 int speed; /* speed */ 100 } SETTINGS; 101 102 /* 103 * Machine definitions 104 */ 105 106 typedef struct { 107 const char *name; 108 const char *name2; 109 struct module *owner; 110 void *(*dma_alloc)(unsigned int, gfp_t); 111 void (*dma_free)(void *, unsigned int); 112 int (*irqinit)(void); 113 void (*irqcleanup)(void); 114 void (*init)(void); 115 void (*silence)(void); 116 int (*setFormat)(int); 117 int (*setVolume)(int); 118 int (*setBass)(int); 119 int (*setTreble)(int); 120 int (*setGain)(int); 121 void (*play)(void); 122 void (*record)(void); /* optional */ 123 void (*mixer_init)(void); /* optional */ 124 int (*mixer_ioctl)(u_int, u_long); /* optional */ 125 int (*write_sq_setup)(void); /* optional */ 126 int (*read_sq_setup)(void); /* optional */ 127 int (*sq_open)(fmode_t); /* optional */ 128 int (*state_info)(char *, size_t); /* optional */ 129 void (*abort_read)(void); /* optional */ 130 int min_dsp_speed; 131 int max_dsp_speed; 132 int version ; 133 int hardware_afmts ; /* OSS says we only return h'ware info */ 134 /* when queried via SNDCTL_DSP_GETFMTS */ 135 int capabilities ; /* low-level reply to SNDCTL_DSP_GETCAPS */ 136 SETTINGS default_hard ; /* open() or init() should set something valid */ 137 SETTINGS default_soft ; /* you can make it look like old OSS, if you want to */ 138 } MACHINE; 139 140 /* 141 * Low level stuff 142 */ 143 144 typedef struct { 145 ssize_t (*ct_ulaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); 146 ssize_t (*ct_alaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); 147 ssize_t (*ct_s8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); 148 ssize_t (*ct_u8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); 149 ssize_t (*ct_s16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); 150 ssize_t (*ct_u16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); 151 ssize_t (*ct_s16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); 152 ssize_t (*ct_u16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); 153 } TRANS; 154 155 struct sound_settings { 156 MACHINE mach; /* machine dependent things */ 157 SETTINGS hard; /* hardware settings */ 158 SETTINGS soft; /* software settings */ 159 SETTINGS dsp; /* /dev/dsp default settings */ 160 TRANS *trans_write; /* supported translations */ 161 int volume_left; /* volume (range is machine dependent) */ 162 int volume_right; 163 int bass; /* tone (range is machine dependent) */ 164 int treble; 165 int gain; 166 int minDev; /* minor device number currently open */ 167 spinlock_t lock; 168 }; 169 170 extern struct sound_settings dmasound; 171 172 #ifdef HAS_8BIT_TABLES 173 extern char dmasound_ulaw2dma8[]; 174 extern char dmasound_alaw2dma8[]; 175 #endif 176 177 /* 178 * Mid level stuff 179 */ 180 181 static inline int dmasound_set_volume(int volume) 182 { 183 return dmasound.mach.setVolume(volume); 184 } 185 186 static inline int dmasound_set_bass(int bass) 187 { 188 return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50; 189 } 190 191 static inline int dmasound_set_treble(int treble) 192 { 193 return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50; 194 } 195 196 static inline int dmasound_set_gain(int gain) 197 { 198 return dmasound.mach.setGain ? dmasound.mach.setGain(gain) : 100; 199 } 200 201 202 /* 203 * Sound queue stuff, the heart of the driver 204 */ 205 206 struct sound_queue { 207 /* buffers allocated for this queue */ 208 int numBufs; /* real limits on what the user can have */ 209 int bufSize; /* in bytes */ 210 char **buffers; 211 212 /* current parameters */ 213 int locked ; /* params cannot be modified when != 0 */ 214 int user_frags ; /* user requests this many */ 215 int user_frag_size ; /* of this size */ 216 int max_count; /* actual # fragments <= numBufs */ 217 int block_size; /* internal block size in bytes */ 218 int max_active; /* in-use fragments <= max_count */ 219 220 /* it shouldn't be necessary to declare any of these volatile */ 221 int front, rear, count; 222 int rear_size; 223 /* 224 * The use of the playing field depends on the hardware 225 * 226 * Atari, PMac: The number of frames that are loaded/playing 227 * 228 * Amiga: Bit 0 is set: a frame is loaded 229 * Bit 1 is set: a frame is playing 230 */ 231 int active; 232 wait_queue_head_t action_queue, open_queue, sync_queue; 233 int non_blocking; 234 int busy, syncing, xruns, died; 235 }; 236 237 #define WAKE_UP(queue) (wake_up_interruptible(&queue)) 238 239 extern struct sound_queue dmasound_write_sq; 240 #define write_sq dmasound_write_sq 241 242 extern int dmasound_catchRadius; 243 #define catchRadius dmasound_catchRadius 244 245 /* define the value to be put in the byte-swap reg in mac-io 246 when we want it to swap for us. 247 */ 248 #define BS_VAL 1 249 250 #define SW_INPUT_VOLUME_SCALE 4 251 #define SW_INPUT_VOLUME_DEFAULT (128 / SW_INPUT_VOLUME_SCALE) 252 253 extern int expand_read_bal; /* Balance factor for reading */ 254 extern uint software_input_volume; /* software implemented recording volume! */ 255 256 #endif /* _dmasound_h_ */ 257