1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Universal MIDI Packet (UMP) Support 4 */ 5 #ifndef __SOUND_UMP_H 6 #define __SOUND_UMP_H 7 8 #include <sound/rawmidi.h> 9 10 struct snd_ump_endpoint; 11 struct snd_ump_block; 12 struct snd_ump_ops; 13 struct ump_cvt_to_ump; 14 struct snd_seq_ump_ops; 15 16 struct snd_ump_group { 17 int group; /* group index (0-based) */ 18 unsigned int dir_bits; /* directions */ 19 bool active; /* activeness */ 20 bool valid; /* valid group (referred by blocks) */ 21 char name[64]; /* group name */ 22 }; 23 24 struct snd_ump_endpoint { 25 struct snd_rawmidi core; /* raw UMP access */ 26 27 struct snd_ump_endpoint_info info; 28 29 const struct snd_ump_ops *ops; /* UMP ops set by the driver */ 30 struct snd_rawmidi_substream *substreams[2]; /* opened substreams */ 31 32 void *private_data; 33 void (*private_free)(struct snd_ump_endpoint *ump); 34 35 /* UMP Stream message processing */ 36 u32 stream_wait_for; /* expected stream message status */ 37 bool stream_finished; /* set when message has been processed */ 38 bool parsed; /* UMP / FB parse finished? */ 39 bool no_process_stream; /* suppress UMP stream messages handling */ 40 wait_queue_head_t stream_wait; 41 struct snd_rawmidi_file stream_rfile; 42 43 struct list_head block_list; /* list of snd_ump_block objects */ 44 45 /* intermediate buffer for UMP input */ 46 u32 input_buf[4]; 47 int input_buf_head; 48 int input_pending; 49 50 struct mutex open_mutex; 51 52 struct snd_ump_group groups[SNDRV_UMP_MAX_GROUPS]; /* table of groups */ 53 54 #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI) 55 spinlock_t legacy_locks[2]; 56 struct snd_rawmidi *legacy_rmidi; 57 struct snd_rawmidi_substream *legacy_substreams[2][SNDRV_UMP_MAX_GROUPS]; 58 unsigned char legacy_mapping[SNDRV_UMP_MAX_GROUPS]; 59 60 /* for legacy output; need to open the actual substream unlike input */ 61 int legacy_out_opens; 62 struct snd_rawmidi_file legacy_out_rfile; 63 struct ump_cvt_to_ump *out_cvts; 64 #endif 65 66 #if IS_ENABLED(CONFIG_SND_SEQUENCER) 67 struct snd_seq_device *seq_dev; 68 const struct snd_seq_ump_ops *seq_ops; 69 void *seq_client; 70 #endif 71 }; 72 73 /* ops filled by UMP drivers */ 74 struct snd_ump_ops { 75 int (*open)(struct snd_ump_endpoint *ump, int dir); 76 void (*close)(struct snd_ump_endpoint *ump, int dir); 77 void (*trigger)(struct snd_ump_endpoint *ump, int dir, int up); 78 void (*drain)(struct snd_ump_endpoint *ump, int dir); 79 }; 80 81 /* ops filled by sequencer binding */ 82 struct snd_seq_ump_ops { 83 void (*input_receive)(struct snd_ump_endpoint *ump, 84 const u32 *data, int words); 85 int (*notify_fb_change)(struct snd_ump_endpoint *ump, 86 struct snd_ump_block *fb); 87 int (*switch_protocol)(struct snd_ump_endpoint *ump); 88 }; 89 90 struct snd_ump_block { 91 struct snd_ump_block_info info; 92 struct snd_ump_endpoint *ump; 93 94 void *private_data; 95 void (*private_free)(struct snd_ump_block *blk); 96 97 struct list_head list; 98 }; 99 100 #define rawmidi_to_ump(rmidi) container_of(rmidi, struct snd_ump_endpoint, core) 101 102 int snd_ump_endpoint_new(struct snd_card *card, char *id, int device, 103 int output, int input, 104 struct snd_ump_endpoint **ump_ret); 105 int snd_ump_parse_endpoint(struct snd_ump_endpoint *ump); 106 int snd_ump_block_new(struct snd_ump_endpoint *ump, unsigned int blk, 107 unsigned int direction, unsigned int first_group, 108 unsigned int num_groups, struct snd_ump_block **blk_ret); 109 int snd_ump_receive(struct snd_ump_endpoint *ump, const u32 *buffer, int count); 110 int snd_ump_transmit(struct snd_ump_endpoint *ump, u32 *buffer, int count); 111 112 #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI) 113 int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump, 114 char *id, int device); 115 #else 116 static inline int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump, 117 char *id, int device) 118 { 119 return 0; 120 } 121 #endif 122 123 int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val); 124 int snd_ump_switch_protocol(struct snd_ump_endpoint *ump, unsigned int protocol); 125 126 /* 127 * Some definitions for UMP 128 */ 129 130 /* MIDI 2.0 Message Type */ 131 enum { 132 UMP_MSG_TYPE_UTILITY = 0x00, 133 UMP_MSG_TYPE_SYSTEM = 0x01, 134 UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE = 0x02, 135 UMP_MSG_TYPE_DATA = 0x03, 136 UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE = 0x04, 137 UMP_MSG_TYPE_EXTENDED_DATA = 0x05, 138 UMP_MSG_TYPE_FLEX_DATA = 0x0d, 139 UMP_MSG_TYPE_STREAM = 0x0f, 140 }; 141 142 /* MIDI 2.0 SysEx / Data Status; same values for both 7-bit and 8-bit SysEx */ 143 enum { 144 UMP_SYSEX_STATUS_SINGLE = 0, 145 UMP_SYSEX_STATUS_START = 1, 146 UMP_SYSEX_STATUS_CONTINUE = 2, 147 UMP_SYSEX_STATUS_END = 3, 148 }; 149 150 /* UMP Utility Type Status (type 0x0) */ 151 enum { 152 UMP_UTILITY_MSG_STATUS_NOOP = 0x00, 153 UMP_UTILITY_MSG_STATUS_JR_CLOCK = 0x01, 154 UMP_UTILITY_MSG_STATUS_JR_TSTAMP = 0x02, 155 UMP_UTILITY_MSG_STATUS_DCTPQ = 0x03, 156 UMP_UTILITY_MSG_STATUS_DC = 0x04, 157 }; 158 159 /* UMP Stream Message Status (type 0xf) */ 160 enum { 161 UMP_STREAM_MSG_STATUS_EP_DISCOVERY = 0x00, 162 UMP_STREAM_MSG_STATUS_EP_INFO = 0x01, 163 UMP_STREAM_MSG_STATUS_DEVICE_INFO = 0x02, 164 UMP_STREAM_MSG_STATUS_EP_NAME = 0x03, 165 UMP_STREAM_MSG_STATUS_PRODUCT_ID = 0x04, 166 UMP_STREAM_MSG_STATUS_STREAM_CFG_REQUEST = 0x05, 167 UMP_STREAM_MSG_STATUS_STREAM_CFG = 0x06, 168 UMP_STREAM_MSG_STATUS_FB_DISCOVERY = 0x10, 169 UMP_STREAM_MSG_STATUS_FB_INFO = 0x11, 170 UMP_STREAM_MSG_STATUS_FB_NAME = 0x12, 171 UMP_STREAM_MSG_STATUS_START_CLIP = 0x20, 172 UMP_STREAM_MSG_STATUS_END_CLIP = 0x21, 173 }; 174 175 /* UMP Endpoint Discovery filter bitmap */ 176 enum { 177 UMP_STREAM_MSG_REQUEST_EP_INFO = (1U << 0), 178 UMP_STREAM_MSG_REQUEST_DEVICE_INFO = (1U << 1), 179 UMP_STREAM_MSG_REQUEST_EP_NAME = (1U << 2), 180 UMP_STREAM_MSG_REQUEST_PRODUCT_ID = (1U << 3), 181 UMP_STREAM_MSG_REQUEST_STREAM_CFG = (1U << 4), 182 }; 183 184 /* UMP Function Block Discovery filter bitmap */ 185 enum { 186 UMP_STREAM_MSG_REQUEST_FB_INFO = (1U << 0), 187 UMP_STREAM_MSG_REQUEST_FB_NAME = (1U << 1), 188 }; 189 190 /* UMP Endpoint Info capability bits (used for protocol request/notify, too) */ 191 enum { 192 UMP_STREAM_MSG_EP_INFO_CAP_TXJR = (1U << 0), /* Sending JRTS */ 193 UMP_STREAM_MSG_EP_INFO_CAP_RXJR = (1U << 1), /* Receiving JRTS */ 194 UMP_STREAM_MSG_EP_INFO_CAP_MIDI1 = (1U << 8), /* MIDI 1.0 */ 195 UMP_STREAM_MSG_EP_INFO_CAP_MIDI2 = (1U << 9), /* MIDI 2.0 */ 196 }; 197 198 /* UMP EP / FB name string format; same as SysEx string handling */ 199 enum { 200 UMP_STREAM_MSG_FORMAT_SINGLE = 0, 201 UMP_STREAM_MSG_FORMAT_START = 1, 202 UMP_STREAM_MSG_FORMAT_CONTINUE = 2, 203 UMP_STREAM_MSG_FORMAT_END = 3, 204 }; 205 206 /* 207 * Helpers for retrieving / filling bits from UMP 208 */ 209 /* get the message type (4bit) from a UMP packet (header) */ 210 static inline unsigned char ump_message_type(u32 data) 211 { 212 return data >> 28; 213 } 214 215 /* get the group number (0-based, 4bit) from a UMP packet (header) */ 216 static inline unsigned char ump_message_group(u32 data) 217 { 218 return (data >> 24) & 0x0f; 219 } 220 221 /* get the MIDI status code (4bit) from a UMP packet (header) */ 222 static inline unsigned char ump_message_status_code(u32 data) 223 { 224 return (data >> 20) & 0x0f; 225 } 226 227 /* get the MIDI channel number (0-based, 4bit) from a UMP packet (header) */ 228 static inline unsigned char ump_message_channel(u32 data) 229 { 230 return (data >> 16) & 0x0f; 231 } 232 233 /* get the MIDI status + channel combo byte (8bit) from a UMP packet (header) */ 234 static inline unsigned char ump_message_status_channel(u32 data) 235 { 236 return (data >> 16) & 0xff; 237 } 238 239 /* compose a UMP packet (header) from type, group and status values */ 240 static inline u32 ump_compose(unsigned char type, unsigned char group, 241 unsigned char status, unsigned char channel) 242 { 243 return ((u32)type << 28) | ((u32)group << 24) | ((u32)status << 20) | 244 ((u32)channel << 16); 245 } 246 247 /* get SysEx message status (for both 7 and 8bits) from a UMP packet (header) */ 248 static inline unsigned char ump_sysex_message_status(u32 data) 249 { 250 return (data >> 20) & 0xf; 251 } 252 253 /* get SysEx message length (for both 7 and 8bits) from a UMP packet (header) */ 254 static inline unsigned char ump_sysex_message_length(u32 data) 255 { 256 return (data >> 16) & 0xf; 257 } 258 259 /* For Stream Messages */ 260 static inline unsigned char ump_stream_message_format(u32 data) 261 { 262 return (data >> 26) & 0x03; 263 } 264 265 static inline unsigned int ump_stream_message_status(u32 data) 266 { 267 return (data >> 16) & 0x3ff; 268 } 269 270 static inline u32 ump_stream_compose(unsigned char status, unsigned short form) 271 { 272 return (UMP_MSG_TYPE_STREAM << 28) | ((u32)form << 26) | 273 ((u32)status << 16); 274 } 275 276 #define ump_is_groupless_msg(type) \ 277 ((type) == UMP_MSG_TYPE_UTILITY || (type) == UMP_MSG_TYPE_STREAM) 278 279 #endif /* __SOUND_UMP_H */ 280