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 bool is_midi1; /* belongs to a MIDI1 FB */ 22 char name[64]; /* group name */ 23 }; 24 25 struct snd_ump_endpoint { 26 struct snd_rawmidi core; /* raw UMP access */ 27 28 struct snd_ump_endpoint_info info; 29 30 const struct snd_ump_ops *ops; /* UMP ops set by the driver */ 31 struct snd_rawmidi_substream *substreams[2]; /* opened substreams */ 32 33 void *private_data; 34 void (*private_free)(struct snd_ump_endpoint *ump); 35 36 /* UMP Stream message processing */ 37 u32 stream_wait_for; /* expected stream message status */ 38 bool stream_finished; /* set when message has been processed */ 39 bool parsed; /* UMP / FB parse finished? */ 40 bool no_process_stream; /* suppress UMP stream messages handling */ 41 wait_queue_head_t stream_wait; 42 struct snd_rawmidi_file stream_rfile; 43 44 struct list_head block_list; /* list of snd_ump_block objects */ 45 46 /* intermediate buffer for UMP input */ 47 u32 input_buf[4]; 48 int input_buf_head; 49 int input_pending; 50 51 struct mutex open_mutex; 52 53 struct snd_ump_group groups[SNDRV_UMP_MAX_GROUPS]; /* table of groups */ 54 55 #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI) 56 spinlock_t legacy_locks[2]; 57 struct snd_rawmidi *legacy_rmidi; 58 struct snd_rawmidi_substream *legacy_substreams[2][SNDRV_UMP_MAX_GROUPS]; 59 unsigned char legacy_mapping[SNDRV_UMP_MAX_GROUPS]; 60 61 /* for legacy output; need to open the actual substream unlike input */ 62 int legacy_out_opens; 63 struct snd_rawmidi_file legacy_out_rfile; 64 struct ump_cvt_to_ump *out_cvts; 65 #endif 66 67 #if IS_ENABLED(CONFIG_SND_SEQUENCER) 68 struct snd_seq_device *seq_dev; 69 const struct snd_seq_ump_ops *seq_ops; 70 void *seq_client; 71 #endif 72 }; 73 74 /* ops filled by UMP drivers */ 75 struct snd_ump_ops { 76 int (*open)(struct snd_ump_endpoint *ump, int dir); 77 void (*close)(struct snd_ump_endpoint *ump, int dir); 78 void (*trigger)(struct snd_ump_endpoint *ump, int dir, int up); 79 void (*drain)(struct snd_ump_endpoint *ump, int dir); 80 }; 81 82 /* ops filled by sequencer binding */ 83 struct snd_seq_ump_ops { 84 void (*input_receive)(struct snd_ump_endpoint *ump, 85 const u32 *data, int words); 86 int (*notify_fb_change)(struct snd_ump_endpoint *ump, 87 struct snd_ump_block *fb); 88 int (*switch_protocol)(struct snd_ump_endpoint *ump); 89 }; 90 91 struct snd_ump_block { 92 struct snd_ump_block_info info; 93 struct snd_ump_endpoint *ump; 94 95 void *private_data; 96 void (*private_free)(struct snd_ump_block *blk); 97 98 struct list_head list; 99 }; 100 101 #define rawmidi_to_ump(rmidi) container_of(rmidi, struct snd_ump_endpoint, core) 102 103 int snd_ump_endpoint_new(struct snd_card *card, char *id, int device, 104 int output, int input, 105 struct snd_ump_endpoint **ump_ret); 106 int snd_ump_parse_endpoint(struct snd_ump_endpoint *ump); 107 int snd_ump_block_new(struct snd_ump_endpoint *ump, unsigned int blk, 108 unsigned int direction, unsigned int first_group, 109 unsigned int num_groups, struct snd_ump_block **blk_ret); 110 int snd_ump_receive(struct snd_ump_endpoint *ump, const u32 *buffer, int count); 111 int snd_ump_transmit(struct snd_ump_endpoint *ump, u32 *buffer, int count); 112 113 #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI) 114 int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump, 115 char *id, int device); 116 #else 117 static inline int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump, 118 char *id, int device) 119 { 120 return 0; 121 } 122 #endif 123 124 int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val); 125 int snd_ump_switch_protocol(struct snd_ump_endpoint *ump, unsigned int protocol); 126 void snd_ump_update_group_attrs(struct snd_ump_endpoint *ump); 127 128 /* 129 * Some definitions for UMP 130 */ 131 132 /* MIDI 2.0 Message Type */ 133 enum { 134 UMP_MSG_TYPE_UTILITY = 0x00, 135 UMP_MSG_TYPE_SYSTEM = 0x01, 136 UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE = 0x02, 137 UMP_MSG_TYPE_DATA = 0x03, 138 UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE = 0x04, 139 UMP_MSG_TYPE_EXTENDED_DATA = 0x05, 140 UMP_MSG_TYPE_FLEX_DATA = 0x0d, 141 UMP_MSG_TYPE_STREAM = 0x0f, 142 }; 143 144 /* MIDI 2.0 SysEx / Data Status; same values for both 7-bit and 8-bit SysEx */ 145 enum { 146 UMP_SYSEX_STATUS_SINGLE = 0, 147 UMP_SYSEX_STATUS_START = 1, 148 UMP_SYSEX_STATUS_CONTINUE = 2, 149 UMP_SYSEX_STATUS_END = 3, 150 }; 151 152 /* UMP Utility Type Status (type 0x0) */ 153 enum { 154 UMP_UTILITY_MSG_STATUS_NOOP = 0x00, 155 UMP_UTILITY_MSG_STATUS_JR_CLOCK = 0x01, 156 UMP_UTILITY_MSG_STATUS_JR_TSTAMP = 0x02, 157 UMP_UTILITY_MSG_STATUS_DCTPQ = 0x03, 158 UMP_UTILITY_MSG_STATUS_DC = 0x04, 159 }; 160 161 /* UMP Stream Message Status (type 0xf) */ 162 enum { 163 UMP_STREAM_MSG_STATUS_EP_DISCOVERY = 0x00, 164 UMP_STREAM_MSG_STATUS_EP_INFO = 0x01, 165 UMP_STREAM_MSG_STATUS_DEVICE_INFO = 0x02, 166 UMP_STREAM_MSG_STATUS_EP_NAME = 0x03, 167 UMP_STREAM_MSG_STATUS_PRODUCT_ID = 0x04, 168 UMP_STREAM_MSG_STATUS_STREAM_CFG_REQUEST = 0x05, 169 UMP_STREAM_MSG_STATUS_STREAM_CFG = 0x06, 170 UMP_STREAM_MSG_STATUS_FB_DISCOVERY = 0x10, 171 UMP_STREAM_MSG_STATUS_FB_INFO = 0x11, 172 UMP_STREAM_MSG_STATUS_FB_NAME = 0x12, 173 UMP_STREAM_MSG_STATUS_START_CLIP = 0x20, 174 UMP_STREAM_MSG_STATUS_END_CLIP = 0x21, 175 }; 176 177 /* UMP Endpoint Discovery filter bitmap */ 178 enum { 179 UMP_STREAM_MSG_REQUEST_EP_INFO = (1U << 0), 180 UMP_STREAM_MSG_REQUEST_DEVICE_INFO = (1U << 1), 181 UMP_STREAM_MSG_REQUEST_EP_NAME = (1U << 2), 182 UMP_STREAM_MSG_REQUEST_PRODUCT_ID = (1U << 3), 183 UMP_STREAM_MSG_REQUEST_STREAM_CFG = (1U << 4), 184 }; 185 186 /* UMP Function Block Discovery filter bitmap */ 187 enum { 188 UMP_STREAM_MSG_REQUEST_FB_INFO = (1U << 0), 189 UMP_STREAM_MSG_REQUEST_FB_NAME = (1U << 1), 190 }; 191 192 /* UMP Endpoint Info capability bits (used for protocol request/notify, too) */ 193 enum { 194 UMP_STREAM_MSG_EP_INFO_CAP_TXJR = (1U << 0), /* Sending JRTS */ 195 UMP_STREAM_MSG_EP_INFO_CAP_RXJR = (1U << 1), /* Receiving JRTS */ 196 UMP_STREAM_MSG_EP_INFO_CAP_MIDI1 = (1U << 8), /* MIDI 1.0 */ 197 UMP_STREAM_MSG_EP_INFO_CAP_MIDI2 = (1U << 9), /* MIDI 2.0 */ 198 }; 199 200 /* UMP EP / FB name string format; same as SysEx string handling */ 201 enum { 202 UMP_STREAM_MSG_FORMAT_SINGLE = 0, 203 UMP_STREAM_MSG_FORMAT_START = 1, 204 UMP_STREAM_MSG_FORMAT_CONTINUE = 2, 205 UMP_STREAM_MSG_FORMAT_END = 3, 206 }; 207 208 /* 209 * Helpers for retrieving / filling bits from UMP 210 */ 211 /* get the message type (4bit) from a UMP packet (header) */ 212 static inline unsigned char ump_message_type(u32 data) 213 { 214 return data >> 28; 215 } 216 217 /* get the group number (0-based, 4bit) from a UMP packet (header) */ 218 static inline unsigned char ump_message_group(u32 data) 219 { 220 return (data >> 24) & 0x0f; 221 } 222 223 /* get the MIDI status code (4bit) from a UMP packet (header) */ 224 static inline unsigned char ump_message_status_code(u32 data) 225 { 226 return (data >> 20) & 0x0f; 227 } 228 229 /* get the MIDI channel number (0-based, 4bit) from a UMP packet (header) */ 230 static inline unsigned char ump_message_channel(u32 data) 231 { 232 return (data >> 16) & 0x0f; 233 } 234 235 /* get the MIDI status + channel combo byte (8bit) from a UMP packet (header) */ 236 static inline unsigned char ump_message_status_channel(u32 data) 237 { 238 return (data >> 16) & 0xff; 239 } 240 241 /* compose a UMP packet (header) from type, group and status values */ 242 static inline u32 ump_compose(unsigned char type, unsigned char group, 243 unsigned char status, unsigned char channel) 244 { 245 return ((u32)type << 28) | ((u32)group << 24) | ((u32)status << 20) | 246 ((u32)channel << 16); 247 } 248 249 /* get SysEx message status (for both 7 and 8bits) from a UMP packet (header) */ 250 static inline unsigned char ump_sysex_message_status(u32 data) 251 { 252 return (data >> 20) & 0xf; 253 } 254 255 /* get SysEx message length (for both 7 and 8bits) from a UMP packet (header) */ 256 static inline unsigned char ump_sysex_message_length(u32 data) 257 { 258 return (data >> 16) & 0xf; 259 } 260 261 /* For Stream Messages */ 262 static inline unsigned char ump_stream_message_format(u32 data) 263 { 264 return (data >> 26) & 0x03; 265 } 266 267 static inline unsigned int ump_stream_message_status(u32 data) 268 { 269 return (data >> 16) & 0x3ff; 270 } 271 272 static inline u32 ump_stream_compose(unsigned char status, unsigned short form) 273 { 274 return (UMP_MSG_TYPE_STREAM << 28) | ((u32)form << 26) | 275 ((u32)status << 16); 276 } 277 278 #define ump_is_groupless_msg(type) \ 279 ((type) == UMP_MSG_TYPE_UTILITY || (type) == UMP_MSG_TYPE_STREAM) 280 281 #endif /* __SOUND_UMP_H */ 282