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31ef9134 CL |
1 | #ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED |
2 | #define SOUND_FIREWIRE_AMDTP_H_INCLUDED | |
3 | ||
20b65dd0 | 4 | #include <linux/err.h> |
76fb8789 | 5 | #include <linux/interrupt.h> |
31ef9134 | 6 | #include <linux/mutex.h> |
777fb574 | 7 | #include <sound/asound.h> |
31ef9134 CL |
8 | #include "packets-buffer.h" |
9 | ||
10 | /** | |
be4a2894 | 11 | * enum cip_flags - describes details of the streaming protocol |
31ef9134 CL |
12 | * @CIP_NONBLOCKING: In non-blocking mode, each packet contains |
13 | * sample_rate/8000 samples, with rounding up or down to adjust | |
14 | * for clock skew and left-over fractional samples. This should | |
15 | * be used if supported by the device. | |
e84d15f6 CL |
16 | * @CIP_BLOCKING: In blocking mode, each packet contains either zero or |
17 | * SYT_INTERVAL samples, with these two types alternating so that | |
18 | * the overall sample rate comes out right. | |
7b3b0d85 TS |
19 | * @CIP_SYNC_TO_DEVICE: In sync to device mode, time stamp in out packets is |
20 | * generated by in packets. Defaultly this driver generates timestamp. | |
31ef9134 | 21 | */ |
be4a2894 | 22 | enum cip_flags { |
7b3b0d85 TS |
23 | CIP_NONBLOCKING = 0x00, |
24 | CIP_BLOCKING = 0x01, | |
10550bea | 25 | CIP_SYNC_TO_DEVICE = 0x02, |
31ef9134 CL |
26 | }; |
27 | ||
28 | /** | |
29 | * enum cip_sfc - a stream's sample rate | |
30 | */ | |
31 | enum cip_sfc { | |
32 | CIP_SFC_32000 = 0, | |
33 | CIP_SFC_44100 = 1, | |
34 | CIP_SFC_48000 = 2, | |
35 | CIP_SFC_88200 = 3, | |
36 | CIP_SFC_96000 = 4, | |
37 | CIP_SFC_176400 = 5, | |
38 | CIP_SFC_192000 = 6, | |
a7304e3b | 39 | CIP_SFC_COUNT |
31ef9134 CL |
40 | }; |
41 | ||
2b3fc456 TS |
42 | #define AMDTP_IN_PCM_FORMAT_BITS SNDRV_PCM_FMTBIT_S32 |
43 | ||
31ef9134 CL |
44 | #define AMDTP_OUT_PCM_FORMAT_BITS (SNDRV_PCM_FMTBIT_S16 | \ |
45 | SNDRV_PCM_FMTBIT_S32) | |
46 | ||
83d8d72d | 47 | |
77d2a8a4 TS |
48 | /* |
49 | * This module supports maximum 64 PCM channels for one PCM stream | |
50 | * This is for our convenience. | |
51 | */ | |
52 | #define AMDTP_MAX_CHANNELS_FOR_PCM 64 | |
53 | ||
83d8d72d TS |
54 | /* |
55 | * AMDTP packet can include channels for MIDI conformant data. | |
56 | * Each MIDI conformant data channel includes 8 MPX-MIDI data stream. | |
57 | * Each MPX-MIDI data stream includes one data stream from/to MIDI ports. | |
58 | * | |
59 | * This module supports maximum 1 MIDI conformant data channels. | |
60 | * Then this AMDTP packets can transfer maximum 8 MIDI data streams. | |
61 | */ | |
62 | #define AMDTP_MAX_CHANNELS_FOR_MIDI 1 | |
63 | ||
31ef9134 CL |
64 | struct fw_unit; |
65 | struct fw_iso_context; | |
66 | struct snd_pcm_substream; | |
83d8d72d | 67 | struct snd_rawmidi_substream; |
31ef9134 | 68 | |
3ff7e8f0 TS |
69 | enum amdtp_stream_direction { |
70 | AMDTP_OUT_STREAM = 0, | |
71 | AMDTP_IN_STREAM | |
72 | }; | |
73 | ||
be4a2894 | 74 | struct amdtp_stream { |
31ef9134 | 75 | struct fw_unit *unit; |
be4a2894 | 76 | enum cip_flags flags; |
3ff7e8f0 | 77 | enum amdtp_stream_direction direction; |
31ef9134 CL |
78 | struct fw_iso_context *context; |
79 | struct mutex mutex; | |
80 | ||
81 | enum cip_sfc sfc; | |
82 | unsigned int data_block_quadlets; | |
83 | unsigned int pcm_channels; | |
84 | unsigned int midi_ports; | |
be4a2894 | 85 | void (*transfer_samples)(struct amdtp_stream *s, |
31ef9134 CL |
86 | struct snd_pcm_substream *pcm, |
87 | __be32 *buffer, unsigned int frames); | |
77d2a8a4 TS |
88 | u8 pcm_positions[AMDTP_MAX_CHANNELS_FOR_PCM]; |
89 | u8 midi_position; | |
31ef9134 CL |
90 | |
91 | unsigned int syt_interval; | |
e84d15f6 | 92 | unsigned int transfer_delay; |
31ef9134 CL |
93 | unsigned int source_node_id_field; |
94 | struct iso_packets_buffer buffer; | |
95 | ||
96 | struct snd_pcm_substream *pcm; | |
76fb8789 | 97 | struct tasklet_struct period_tasklet; |
31ef9134 | 98 | |
ec00f5e4 | 99 | int packet_index; |
31ef9134 CL |
100 | unsigned int data_block_counter; |
101 | ||
102 | unsigned int data_block_state; | |
103 | ||
104 | unsigned int last_syt_offset; | |
105 | unsigned int syt_offset_state; | |
106 | ||
107 | unsigned int pcm_buffer_pointer; | |
108 | unsigned int pcm_period_pointer; | |
92b862c7 | 109 | bool pointer_flush; |
83d8d72d TS |
110 | |
111 | struct snd_rawmidi_substream *midi[AMDTP_MAX_CHANNELS_FOR_MIDI * 8]; | |
7b3b0d85 TS |
112 | |
113 | bool callbacked; | |
114 | wait_queue_head_t callback_wait; | |
115 | struct amdtp_stream *sync_slave; | |
31ef9134 CL |
116 | }; |
117 | ||
be4a2894 | 118 | int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit, |
3ff7e8f0 | 119 | enum amdtp_stream_direction dir, |
be4a2894 TS |
120 | enum cip_flags flags); |
121 | void amdtp_stream_destroy(struct amdtp_stream *s); | |
31ef9134 | 122 | |
be4a2894 TS |
123 | void amdtp_stream_set_parameters(struct amdtp_stream *s, |
124 | unsigned int rate, | |
125 | unsigned int pcm_channels, | |
126 | unsigned int midi_ports); | |
127 | unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s); | |
31ef9134 | 128 | |
be4a2894 TS |
129 | int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed); |
130 | void amdtp_stream_update(struct amdtp_stream *s); | |
131 | void amdtp_stream_stop(struct amdtp_stream *s); | |
31ef9134 | 132 | |
be4a2894 TS |
133 | void amdtp_stream_set_pcm_format(struct amdtp_stream *s, |
134 | snd_pcm_format_t format); | |
135 | void amdtp_stream_pcm_prepare(struct amdtp_stream *s); | |
136 | unsigned long amdtp_stream_pcm_pointer(struct amdtp_stream *s); | |
137 | void amdtp_stream_pcm_abort(struct amdtp_stream *s); | |
31ef9134 | 138 | |
c5280e99 | 139 | extern const unsigned int amdtp_syt_intervals[CIP_SFC_COUNT]; |
a7304e3b | 140 | |
be4a2894 TS |
141 | /** |
142 | * amdtp_stream_running - check stream is running or not | |
143 | * @s: the AMDTP stream | |
144 | * | |
145 | * If this function returns true, the stream is running. | |
146 | */ | |
147 | static inline bool amdtp_stream_running(struct amdtp_stream *s) | |
20b65dd0 CL |
148 | { |
149 | return !IS_ERR(s->context); | |
150 | } | |
151 | ||
ec00f5e4 | 152 | /** |
be4a2894 TS |
153 | * amdtp_streaming_error - check for streaming error |
154 | * @s: the AMDTP stream | |
ec00f5e4 CL |
155 | * |
156 | * If this function returns true, the stream's packet queue has stopped due to | |
157 | * an asynchronous error. | |
158 | */ | |
be4a2894 | 159 | static inline bool amdtp_streaming_error(struct amdtp_stream *s) |
ec00f5e4 CL |
160 | { |
161 | return s->packet_index < 0; | |
162 | } | |
163 | ||
83d8d72d TS |
164 | /** |
165 | * amdtp_stream_pcm_running - check PCM substream is running or not | |
166 | * @s: the AMDTP stream | |
167 | * | |
168 | * If this function returns true, PCM substream in the AMDTP stream is running. | |
169 | */ | |
170 | static inline bool amdtp_stream_pcm_running(struct amdtp_stream *s) | |
171 | { | |
172 | return !!s->pcm; | |
173 | } | |
174 | ||
31ef9134 | 175 | /** |
be4a2894 TS |
176 | * amdtp_stream_pcm_trigger - start/stop playback from a PCM device |
177 | * @s: the AMDTP stream | |
31ef9134 CL |
178 | * @pcm: the PCM device to be started, or %NULL to stop the current device |
179 | * | |
180 | * Call this function on a running isochronous stream to enable the actual | |
181 | * transmission of PCM data. This function should be called from the PCM | |
182 | * device's .trigger callback. | |
183 | */ | |
be4a2894 TS |
184 | static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s, |
185 | struct snd_pcm_substream *pcm) | |
31ef9134 CL |
186 | { |
187 | ACCESS_ONCE(s->pcm) = pcm; | |
188 | } | |
189 | ||
83d8d72d TS |
190 | /** |
191 | * amdtp_stream_midi_trigger - start/stop playback/capture with a MIDI device | |
192 | * @s: the AMDTP stream | |
193 | * @port: index of MIDI port | |
194 | * @midi: the MIDI device to be started, or %NULL to stop the current device | |
195 | * | |
196 | * Call this function on a running isochronous stream to enable the actual | |
197 | * transmission of MIDI data. This function should be called from the MIDI | |
198 | * device's .trigger callback. | |
199 | */ | |
200 | static inline void amdtp_stream_midi_trigger(struct amdtp_stream *s, | |
201 | unsigned int port, | |
202 | struct snd_rawmidi_substream *midi) | |
203 | { | |
204 | if (port < s->midi_ports) | |
205 | ACCESS_ONCE(s->midi[port]) = midi; | |
206 | } | |
207 | ||
31ef9134 CL |
208 | static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc) |
209 | { | |
210 | return sfc & 1; | |
211 | } | |
212 | ||
7b3b0d85 TS |
213 | static inline void amdtp_stream_set_sync(enum cip_flags sync_mode, |
214 | struct amdtp_stream *master, | |
215 | struct amdtp_stream *slave) | |
216 | { | |
217 | if (sync_mode == CIP_SYNC_TO_DEVICE) { | |
218 | master->flags |= CIP_SYNC_TO_DEVICE; | |
219 | slave->flags |= CIP_SYNC_TO_DEVICE; | |
220 | master->sync_slave = slave; | |
221 | } else { | |
222 | master->flags &= ~CIP_SYNC_TO_DEVICE; | |
223 | slave->flags &= ~CIP_SYNC_TO_DEVICE; | |
224 | master->sync_slave = NULL; | |
225 | } | |
226 | ||
227 | slave->sync_slave = NULL; | |
228 | } | |
229 | ||
230 | /** | |
231 | * amdtp_stream_wait_callback - sleep till callbacked or timeout | |
232 | * @s: the AMDTP stream | |
233 | * @timeout: msec till timeout | |
234 | * | |
235 | * If this function return false, the AMDTP stream should be stopped. | |
236 | */ | |
237 | static inline bool amdtp_stream_wait_callback(struct amdtp_stream *s, | |
238 | unsigned int timeout) | |
239 | { | |
240 | return wait_event_timeout(s->callback_wait, | |
241 | s->callbacked == true, | |
242 | msecs_to_jiffies(timeout)) > 0; | |
243 | } | |
244 | ||
31ef9134 | 245 | #endif |