xref: /openbmc/linux/sound/firewire/tascam/tascam.h (revision 7ae2f179)
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 	const struct snd_tscm_spec *spec;
74 
75 	struct fw_iso_resources tx_resources;
76 	struct fw_iso_resources rx_resources;
77 	struct amdtp_stream tx_stream;
78 	struct amdtp_stream rx_stream;
79 	unsigned int substreams_counter;
80 
81 	int dev_lock_count;
82 	bool dev_lock_changed;
83 	wait_queue_head_t hwdep_wait;
84 
85 	/* For MIDI message incoming transactions. */
86 	struct fw_address_handler async_handler;
87 	struct snd_rawmidi_substream *tx_midi_substreams[TSCM_MIDI_IN_PORT_MAX];
88 
89 	/* For MIDI message outgoing transactions. */
90 	struct snd_fw_async_midi_port out_ports[TSCM_MIDI_OUT_PORT_MAX];
91 
92 	// A cache of status information in tx isoc packets.
93 	__be32 state[SNDRV_FIREWIRE_TASCAM_STATE_COUNT];
94 	struct snd_hwdep *hwdep;
95 	struct snd_firewire_tascam_change queue[SND_TSCM_QUEUE_COUNT];
96 	unsigned int pull_pos;
97 	unsigned int push_pos;
98 
99 	struct amdtp_domain domain;
100 	bool need_long_tx_init_skip;
101 };
102 
103 #define TSCM_ADDR_BASE			0xffff00000000ull
104 
105 #define TSCM_OFFSET_FIRMWARE_REGISTER	0x0000
106 #define TSCM_OFFSET_FIRMWARE_FPGA	0x0004
107 #define TSCM_OFFSET_FIRMWARE_ARM	0x0008
108 #define TSCM_OFFSET_FIRMWARE_HW		0x000c
109 
110 #define TSCM_OFFSET_ISOC_TX_CH		0x0200
111 #define TSCM_OFFSET_UNKNOWN		0x0204
112 #define TSCM_OFFSET_START_STREAMING	0x0208
113 #define TSCM_OFFSET_ISOC_RX_CH		0x020c
114 #define TSCM_OFFSET_ISOC_RX_ON		0x0210	/* Little conviction. */
115 #define TSCM_OFFSET_TX_PCM_CHANNELS	0x0214
116 #define TSCM_OFFSET_RX_PCM_CHANNELS	0x0218
117 #define TSCM_OFFSET_MULTIPLEX_MODE	0x021c
118 #define TSCM_OFFSET_ISOC_TX_ON		0x0220
119 /* Unknown				0x0224 */
120 #define TSCM_OFFSET_CLOCK_STATUS	0x0228
121 #define TSCM_OFFSET_SET_OPTION		0x022c
122 
123 #define TSCM_OFFSET_MIDI_TX_ON		0x0300
124 #define TSCM_OFFSET_MIDI_TX_ADDR_HI	0x0304
125 #define TSCM_OFFSET_MIDI_TX_ADDR_LO	0x0308
126 
127 #define TSCM_OFFSET_LED_POWER		0x0404
128 
129 #define TSCM_OFFSET_MIDI_RX_QUAD	0x4000
130 
131 // Although FE-8 supports the above registers, it has no I/O interfaces for
132 // audio samples and music messages. Otherwise it supports another notification
133 // for status and control message as well as LED brightening. The message
134 // consists of quadlet-aligned data up to 32 quadlets. The first byte of message
135 // is fixed to 0x40. The second byte is between 0x00 to 0x1f and represent each
136 // control:
137 //   fader:	0x00-0x07
138 //   button:	0x0d, 0x0e
139 //   knob:	0x14-0x1b
140 //   sensing:	0x0b
141 //
142 // The rest two bytes represent state of the controls; e.g. current value for
143 // fader and knob, bitmasks for button and sensing.
144 // Just after turning on, 32 quadlets messages with 0x00-0x1f are immediately
145 // sent in one transaction. After, several quadlets are sent in one transaction.
146 //
147 // TSCM_OFFSET_FE8_CTL_TX_ON		0x0310
148 // TSCM_OFFSET_FE8_CTL_TX_ADDR_HI	0x0314
149 // TSCM_OFFSET_FE8_CTL_TX_ADDR_LO	0x0318
150 
151 enum snd_tscm_clock {
152 	SND_TSCM_CLOCK_INTERNAL = 0,
153 	SND_TSCM_CLOCK_WORD	= 1,
154 	SND_TSCM_CLOCK_SPDIF	= 2,
155 	SND_TSCM_CLOCK_ADAT	= 3,
156 };
157 
158 int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit,
159 		  enum amdtp_stream_direction dir, unsigned int pcm_channels);
160 int amdtp_tscm_set_parameters(struct amdtp_stream *s, unsigned int rate);
161 int amdtp_tscm_add_pcm_hw_constraints(struct amdtp_stream *s,
162 				      struct snd_pcm_runtime *runtime);
163 
164 int snd_tscm_stream_get_rate(struct snd_tscm *tscm, unsigned int *rate);
165 int snd_tscm_stream_get_clock(struct snd_tscm *tscm,
166 			      enum snd_tscm_clock *clock);
167 int snd_tscm_stream_init_duplex(struct snd_tscm *tscm);
168 void snd_tscm_stream_update_duplex(struct snd_tscm *tscm);
169 void snd_tscm_stream_destroy_duplex(struct snd_tscm *tscm);
170 int snd_tscm_stream_reserve_duplex(struct snd_tscm *tscm, unsigned int rate,
171 				   unsigned int frames_per_period,
172 				   unsigned int frames_per_buffer);
173 int snd_tscm_stream_start_duplex(struct snd_tscm *tscm, unsigned int rate);
174 void snd_tscm_stream_stop_duplex(struct snd_tscm *tscm);
175 
176 void snd_tscm_stream_lock_changed(struct snd_tscm *tscm);
177 int snd_tscm_stream_lock_try(struct snd_tscm *tscm);
178 void snd_tscm_stream_lock_release(struct snd_tscm *tscm);
179 
180 void snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port);
181 
182 static inline void
snd_fw_async_midi_port_run(struct snd_fw_async_midi_port * port,struct snd_rawmidi_substream * substream)183 snd_fw_async_midi_port_run(struct snd_fw_async_midi_port *port,
184 			   struct snd_rawmidi_substream *substream)
185 {
186 	if (!port->error) {
187 		port->substream = substream;
188 		schedule_work(&port->work);
189 	}
190 }
191 
192 static inline void
snd_fw_async_midi_port_finish(struct snd_fw_async_midi_port * port)193 snd_fw_async_midi_port_finish(struct snd_fw_async_midi_port *port)
194 {
195 	port->substream = NULL;
196 	cancel_work_sync(&port->work);
197 	port->error = false;
198 }
199 
200 int snd_tscm_transaction_register(struct snd_tscm *tscm);
201 int snd_tscm_transaction_reregister(struct snd_tscm *tscm);
202 void snd_tscm_transaction_unregister(struct snd_tscm *tscm);
203 
204 void snd_tscm_proc_init(struct snd_tscm *tscm);
205 
206 int snd_tscm_create_pcm_devices(struct snd_tscm *tscm);
207 
208 int snd_tscm_create_midi_devices(struct snd_tscm *tscm);
209 
210 int snd_tscm_create_hwdep_device(struct snd_tscm *tscm);
211 
212 #endif
213