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Linux/sound/firewire/tascam/tascam.h

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /*
  3  * tascam.h - a part of driver for TASCAM FireWire series
  4  *
  5  * Copyright (c) 2015 Takashi Sakamoto
  6  */
  7 
  8 #ifndef SOUND_TASCAM_H_INCLUDED
  9 #define SOUND_TASCAM_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/core.h>
 22 #include <sound/initval.h>
 23 #include <sound/info.h>
 24 #include <sound/pcm.h>
 25 #include <sound/pcm_params.h>
 26 #include <sound/firewire.h>
 27 #include <sound/hwdep.h>
 28 #include <sound/rawmidi.h>
 29 
 30 #include "../lib.h"
 31 #include "../amdtp-stream.h"
 32 #include "../iso-resources.h"
 33 
 34 struct snd_tscm_spec {
 35         const char *const name;
 36         bool has_adat;
 37         bool has_spdif;
 38         unsigned int pcm_capture_analog_channels;
 39         unsigned int pcm_playback_analog_channels;
 40         unsigned int midi_capture_ports;
 41         unsigned int midi_playback_ports;
 42 };
 43 
 44 #define TSCM_MIDI_IN_PORT_MAX   4
 45 #define TSCM_MIDI_OUT_PORT_MAX  4
 46 
 47 struct snd_fw_async_midi_port {
 48         struct fw_device *parent;
 49         struct work_struct work;
 50         bool idling;
 51         ktime_t next_ktime;
 52         bool error;
 53 
 54         struct fw_transaction transaction;
 55 
 56         u8 buf[4];
 57         u8 running_status;
 58         bool on_sysex;
 59 
 60         struct snd_rawmidi_substream *substream;
 61         int consume_bytes;
 62 };
 63 
 64 #define SND_TSCM_QUEUE_COUNT    16
 65 
 66 struct snd_tscm {
 67         struct snd_card *card;
 68         struct fw_unit *unit;
 69 
 70         struct mutex mutex;
 71         spinlock_t lock;
 72 
 73         bool registered;
 74         struct delayed_work dwork;
 75         const struct snd_tscm_spec *spec;
 76 
 77         struct fw_iso_resources tx_resources;
 78         struct fw_iso_resources rx_resources;
 79         struct amdtp_stream tx_stream;
 80         struct amdtp_stream rx_stream;
 81         unsigned int substreams_counter;
 82 
 83         int dev_lock_count;
 84         bool dev_lock_changed;
 85         wait_queue_head_t hwdep_wait;
 86 
 87         /* For MIDI message incoming transactions. */
 88         struct fw_address_handler async_handler;
 89         struct snd_rawmidi_substream *tx_midi_substreams[TSCM_MIDI_IN_PORT_MAX];
 90 
 91         /* For MIDI message outgoing transactions. */
 92         struct snd_fw_async_midi_port out_ports[TSCM_MIDI_OUT_PORT_MAX];
 93 
 94         // A cache of status information in tx isoc packets.
 95         __be32 state[SNDRV_FIREWIRE_TASCAM_STATE_COUNT];
 96         struct snd_hwdep *hwdep;
 97         struct snd_firewire_tascam_change queue[SND_TSCM_QUEUE_COUNT];
 98         unsigned int pull_pos;
 99         unsigned int push_pos;
100 
101         struct amdtp_domain domain;
102 };
103 
104 #define TSCM_ADDR_BASE                  0xffff00000000ull
105 
106 #define TSCM_OFFSET_FIRMWARE_REGISTER   0x0000
107 #define TSCM_OFFSET_FIRMWARE_FPGA       0x0004
108 #define TSCM_OFFSET_FIRMWARE_ARM        0x0008
109 #define TSCM_OFFSET_FIRMWARE_HW         0x000c
110 
111 #define TSCM_OFFSET_ISOC_TX_CH          0x0200
112 #define TSCM_OFFSET_UNKNOWN             0x0204
113 #define TSCM_OFFSET_START_STREAMING     0x0208
114 #define TSCM_OFFSET_ISOC_RX_CH          0x020c
115 #define TSCM_OFFSET_ISOC_RX_ON          0x0210  /* Little conviction. */
116 #define TSCM_OFFSET_TX_PCM_CHANNELS     0x0214
117 #define TSCM_OFFSET_RX_PCM_CHANNELS     0x0218
118 #define TSCM_OFFSET_MULTIPLEX_MODE      0x021c
119 #define TSCM_OFFSET_ISOC_TX_ON          0x0220
120 /* Unknown                              0x0224 */
121 #define TSCM_OFFSET_CLOCK_STATUS        0x0228
122 #define TSCM_OFFSET_SET_OPTION          0x022c
123 
124 #define TSCM_OFFSET_MIDI_TX_ON          0x0300
125 #define TSCM_OFFSET_MIDI_TX_ADDR_HI     0x0304
126 #define TSCM_OFFSET_MIDI_TX_ADDR_LO     0x0308
127 
128 #define TSCM_OFFSET_LED_POWER           0x0404
129 
130 #define TSCM_OFFSET_MIDI_RX_QUAD        0x4000
131 
132 // Although FE-8 supports the above registers, it has no I/O interfaces for
133 // audio samples and music messages. Otherwise it supports another notification
134 // for status and control message as well as LED brightening. The message
135 // consists of quadlet-aligned data up to 32 quadlets. The first byte of message
136 // is fixed to 0x40. The second byte is between 0x00 to 0x1f and represent each
137 // control:
138 //   fader:     0x00-0x07
139 //   button:    0x0d, 0x0e
140 //   knob:      0x14-0x1b
141 //   sensing:   0x0b
142 //
143 // The rest two bytes represent state of the controls; e.g. current value for
144 // fader and knob, bitmasks for button and sensing.
145 // Just after turning on, 32 quadlets messages with 0x00-0x1f are immediately
146 // sent in one transaction. After, several quadlets are sent in one transaction.
147 //
148 // TSCM_OFFSET_FE8_CTL_TX_ON            0x0310
149 // TSCM_OFFSET_FE8_CTL_TX_ADDR_HI       0x0314
150 // TSCM_OFFSET_FE8_CTL_TX_ADDR_LO       0x0318
151 
152 enum snd_tscm_clock {
153         SND_TSCM_CLOCK_INTERNAL = 0,
154         SND_TSCM_CLOCK_WORD     = 1,
155         SND_TSCM_CLOCK_SPDIF    = 2,
156         SND_TSCM_CLOCK_ADAT     = 3,
157 };
158 
159 int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit,
160                   enum amdtp_stream_direction dir, unsigned int pcm_channels);
161 int amdtp_tscm_set_parameters(struct amdtp_stream *s, unsigned int rate);
162 int amdtp_tscm_add_pcm_hw_constraints(struct amdtp_stream *s,
163                                       struct snd_pcm_runtime *runtime);
164 
165 int snd_tscm_stream_get_rate(struct snd_tscm *tscm, unsigned int *rate);
166 int snd_tscm_stream_get_clock(struct snd_tscm *tscm,
167                               enum snd_tscm_clock *clock);
168 int snd_tscm_stream_init_duplex(struct snd_tscm *tscm);
169 void snd_tscm_stream_update_duplex(struct snd_tscm *tscm);
170 void snd_tscm_stream_destroy_duplex(struct snd_tscm *tscm);
171 int snd_tscm_stream_reserve_duplex(struct snd_tscm *tscm, unsigned int rate,
172                                    unsigned int frames_per_period,
173                                    unsigned int frames_per_buffer);
174 int snd_tscm_stream_start_duplex(struct snd_tscm *tscm, unsigned int rate);
175 void snd_tscm_stream_stop_duplex(struct snd_tscm *tscm);
176 
177 void snd_tscm_stream_lock_changed(struct snd_tscm *tscm);
178 int snd_tscm_stream_lock_try(struct snd_tscm *tscm);
179 void snd_tscm_stream_lock_release(struct snd_tscm *tscm);
180 
181 void snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port);
182 
183 static inline void
184 snd_fw_async_midi_port_run(struct snd_fw_async_midi_port *port,
185                            struct snd_rawmidi_substream *substream)
186 {
187         if (!port->error) {
188                 port->substream = substream;
189                 schedule_work(&port->work);
190         }
191 }
192 
193 static inline void
194 snd_fw_async_midi_port_finish(struct snd_fw_async_midi_port *port)
195 {
196         port->substream = NULL;
197         cancel_work_sync(&port->work);
198         port->error = false;
199 }
200 
201 int snd_tscm_transaction_register(struct snd_tscm *tscm);
202 int snd_tscm_transaction_reregister(struct snd_tscm *tscm);
203 void snd_tscm_transaction_unregister(struct snd_tscm *tscm);
204 
205 void snd_tscm_proc_init(struct snd_tscm *tscm);
206 
207 int snd_tscm_create_pcm_devices(struct snd_tscm *tscm);
208 
209 int snd_tscm_create_midi_devices(struct snd_tscm *tscm);
210 
211 int snd_tscm_create_hwdep_device(struct snd_tscm *tscm);
212 
213 #endif
214 

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