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