1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * motu.h - a part of driver for MOTU FireWire series
4 *
5 * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
6 */
7
8 #ifndef SOUND_FIREWIRE_MOTU_H_INCLUDED
9 #define SOUND_FIREWIRE_MOTU_H_INCLUDED
10
11 #include <linux/device.h>
12 #include <linux/firewire.h>
13 #include <linux/firewire-constants.h>
14 #include <linux/module.h>
15 #include <linux/mod_devicetable.h>
16 #include <linux/mutex.h>
17 #include <linux/slab.h>
18 #include <linux/compat.h>
19 #include <linux/sched/signal.h>
20
21 #include <sound/control.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/info.h>
25 #include <sound/rawmidi.h>
26 #include <sound/firewire.h>
27 #include <sound/hwdep.h>
28
29 #include "../lib.h"
30 #include "../amdtp-stream.h"
31 #include "../iso-resources.h"
32
33 struct snd_motu_packet_format {
34 unsigned char midi_flag_offset;
35 unsigned char midi_byte_offset;
36 unsigned char pcm_byte_offset;
37
38 unsigned char msg_chunks;
39 unsigned char pcm_chunks[3];
40 };
41
42 struct snd_motu {
43 struct snd_card *card;
44 struct fw_unit *unit;
45 struct mutex mutex;
46 spinlock_t lock;
47
48 bool registered;
49 struct delayed_work dwork;
50
51 /* Model dependent information. */
52 const struct snd_motu_spec *spec;
53
54 /* For packet streaming */
55 struct snd_motu_packet_format tx_packet_formats;
56 struct snd_motu_packet_format rx_packet_formats;
57 struct amdtp_stream tx_stream;
58 struct amdtp_stream rx_stream;
59 struct fw_iso_resources tx_resources;
60 struct fw_iso_resources rx_resources;
61 unsigned int substreams_counter;
62
63 /* For notification. */
64 struct fw_address_handler async_handler;
65 u32 msg;
66
67 /* For uapi */
68 int dev_lock_count;
69 bool dev_lock_changed;
70 wait_queue_head_t hwdep_wait;
71
72 struct amdtp_domain domain;
73 };
74
75 enum snd_motu_spec_flags {
76 SND_MOTU_SPEC_RX_MIDI_2ND_Q = 0x0001,
77 SND_MOTU_SPEC_RX_MIDI_3RD_Q = 0x0002,
78 SND_MOTU_SPEC_TX_MIDI_2ND_Q = 0x0004,
79 SND_MOTU_SPEC_TX_MIDI_3RD_Q = 0x0008,
80 };
81
82 #define SND_MOTU_CLOCK_RATE_COUNT 6
83 extern const unsigned int snd_motu_clock_rates[SND_MOTU_CLOCK_RATE_COUNT];
84
85 enum snd_motu_clock_source {
86 SND_MOTU_CLOCK_SOURCE_INTERNAL,
87 SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB,
88 SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT,
89 SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_A,
90 SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_B,
91 SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT,
92 SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_A,
93 SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_B,
94 SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX,
95 SND_MOTU_CLOCK_SOURCE_AESEBU_ON_XLR,
96 SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC,
97 SND_MOTU_CLOCK_SOURCE_SPH,
98 SND_MOTU_CLOCK_SOURCE_UNKNOWN,
99 };
100
101 enum snd_motu_protocol_version {
102 SND_MOTU_PROTOCOL_V2,
103 SND_MOTU_PROTOCOL_V3,
104 };
105
106 struct snd_motu_spec {
107 const char *const name;
108 enum snd_motu_protocol_version protocol_version;
109 enum snd_motu_spec_flags flags;
110
111 unsigned char tx_fixed_pcm_chunks[3];
112 unsigned char rx_fixed_pcm_chunks[3];
113 };
114
115 extern const struct snd_motu_spec snd_motu_spec_828mk2;
116 extern const struct snd_motu_spec snd_motu_spec_traveler;
117 extern const struct snd_motu_spec snd_motu_spec_ultralite;
118 extern const struct snd_motu_spec snd_motu_spec_8pre;
119
120 extern const struct snd_motu_spec snd_motu_spec_828mk3;
121 extern const struct snd_motu_spec snd_motu_spec_ultralite_mk3;
122 extern const struct snd_motu_spec snd_motu_spec_audio_express;
123 extern const struct snd_motu_spec snd_motu_spec_4pre;
124
125 int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
126 enum amdtp_stream_direction dir,
127 const struct snd_motu_spec *spec);
128 int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate,
129 unsigned int midi_ports,
130 struct snd_motu_packet_format *formats);
131 int amdtp_motu_add_pcm_hw_constraints(struct amdtp_stream *s,
132 struct snd_pcm_runtime *runtime);
133 void amdtp_motu_midi_trigger(struct amdtp_stream *s, unsigned int port,
134 struct snd_rawmidi_substream *midi);
135
136 int snd_motu_transaction_read(struct snd_motu *motu, u32 offset, __be32 *reg,
137 size_t size);
138 int snd_motu_transaction_write(struct snd_motu *motu, u32 offset, __be32 *reg,
139 size_t size);
140 int snd_motu_transaction_register(struct snd_motu *motu);
141 int snd_motu_transaction_reregister(struct snd_motu *motu);
142 void snd_motu_transaction_unregister(struct snd_motu *motu);
143
144 int snd_motu_stream_init_duplex(struct snd_motu *motu);
145 void snd_motu_stream_destroy_duplex(struct snd_motu *motu);
146 int snd_motu_stream_cache_packet_formats(struct snd_motu *motu);
147 int snd_motu_stream_reserve_duplex(struct snd_motu *motu, unsigned int rate,
148 unsigned int frames_per_period,
149 unsigned int frames_per_buffer);
150 int snd_motu_stream_start_duplex(struct snd_motu *motu);
151 void snd_motu_stream_stop_duplex(struct snd_motu *motu);
152 int snd_motu_stream_lock_try(struct snd_motu *motu);
153 void snd_motu_stream_lock_release(struct snd_motu *motu);
154
155 void snd_motu_proc_init(struct snd_motu *motu);
156
157 int snd_motu_create_pcm_devices(struct snd_motu *motu);
158
159 int snd_motu_create_midi_devices(struct snd_motu *motu);
160
161 int snd_motu_create_hwdep_device(struct snd_motu *motu);
162
163 int snd_motu_protocol_v2_get_clock_rate(struct snd_motu *motu,
164 unsigned int *rate);
165 int snd_motu_protocol_v2_set_clock_rate(struct snd_motu *motu,
166 unsigned int rate);
167 int snd_motu_protocol_v2_get_clock_source(struct snd_motu *motu,
168 enum snd_motu_clock_source *src);
169 int snd_motu_protocol_v2_switch_fetching_mode(struct snd_motu *motu,
170 bool enable);
171 int snd_motu_protocol_v2_cache_packet_formats(struct snd_motu *motu);
172
173 int snd_motu_protocol_v3_get_clock_rate(struct snd_motu *motu,
174 unsigned int *rate);
175 int snd_motu_protocol_v3_set_clock_rate(struct snd_motu *motu,
176 unsigned int rate);
177 int snd_motu_protocol_v3_get_clock_source(struct snd_motu *motu,
178 enum snd_motu_clock_source *src);
179 int snd_motu_protocol_v3_switch_fetching_mode(struct snd_motu *motu,
180 bool enable);
181 int snd_motu_protocol_v3_cache_packet_formats(struct snd_motu *motu);
182
snd_motu_protocol_get_clock_rate(struct snd_motu * motu,unsigned int * rate)183 static inline int snd_motu_protocol_get_clock_rate(struct snd_motu *motu,
184 unsigned int *rate)
185 {
186 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2)
187 return snd_motu_protocol_v2_get_clock_rate(motu, rate);
188 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
189 return snd_motu_protocol_v3_get_clock_rate(motu, rate);
190 else
191 return -ENXIO;
192 }
193
snd_motu_protocol_set_clock_rate(struct snd_motu * motu,unsigned int rate)194 static inline int snd_motu_protocol_set_clock_rate(struct snd_motu *motu,
195 unsigned int rate)
196 {
197 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2)
198 return snd_motu_protocol_v2_set_clock_rate(motu, rate);
199 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
200 return snd_motu_protocol_v3_set_clock_rate(motu, rate);
201 else
202 return -ENXIO;
203 }
204
snd_motu_protocol_get_clock_source(struct snd_motu * motu,enum snd_motu_clock_source * source)205 static inline int snd_motu_protocol_get_clock_source(struct snd_motu *motu,
206 enum snd_motu_clock_source *source)
207 {
208 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2)
209 return snd_motu_protocol_v2_get_clock_source(motu, source);
210 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
211 return snd_motu_protocol_v3_get_clock_source(motu, source);
212 else
213 return -ENXIO;
214 }
215
snd_motu_protocol_switch_fetching_mode(struct snd_motu * motu,bool enable)216 static inline int snd_motu_protocol_switch_fetching_mode(struct snd_motu *motu,
217 bool enable)
218 {
219 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2)
220 return snd_motu_protocol_v2_switch_fetching_mode(motu, enable);
221 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
222 return snd_motu_protocol_v3_switch_fetching_mode(motu, enable);
223 else
224 return -ENXIO;
225 }
226
snd_motu_protocol_cache_packet_formats(struct snd_motu * motu)227 static inline int snd_motu_protocol_cache_packet_formats(struct snd_motu *motu)
228 {
229 if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V2)
230 return snd_motu_protocol_v2_cache_packet_formats(motu);
231 else if (motu->spec->protocol_version == SND_MOTU_PROTOCOL_V3)
232 return snd_motu_protocol_v3_cache_packet_formats(motu);
233 else
234 return -ENXIO;
235 }
236
237 #endif
238