1
2#ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED
3#define SOUND_FIREWIRE_AMDTP_H_INCLUDED
4
5#include <linux/err.h>
6#include <linux/interrupt.h>
7#include <linux/mutex.h>
8#include <linux/sched.h>
9#include <sound/asound.h>
10#include "packets-buffer.h"
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37enum cip_flags {
38 CIP_NONBLOCKING = 0x00,
39 CIP_BLOCKING = 0x01,
40 CIP_EMPTY_WITH_TAG0 = 0x02,
41 CIP_DBC_IS_END_EVENT = 0x04,
42 CIP_WRONG_DBS = 0x08,
43 CIP_SKIP_DBC_ZERO_CHECK = 0x10,
44 CIP_EMPTY_HAS_WRONG_DBC = 0x20,
45 CIP_JUMBO_PAYLOAD = 0x40,
46 CIP_HEADER_WITHOUT_EOH = 0x80,
47 CIP_NO_HEADER = 0x100,
48};
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73enum cip_sfc {
74 CIP_SFC_32000 = 0,
75 CIP_SFC_44100 = 1,
76 CIP_SFC_48000 = 2,
77 CIP_SFC_88200 = 3,
78 CIP_SFC_96000 = 4,
79 CIP_SFC_176400 = 5,
80 CIP_SFC_192000 = 6,
81 CIP_SFC_COUNT
82};
83
84struct fw_unit;
85struct fw_iso_context;
86struct snd_pcm_substream;
87struct snd_pcm_runtime;
88
89enum amdtp_stream_direction {
90 AMDTP_OUT_STREAM = 0,
91 AMDTP_IN_STREAM
92};
93
94struct amdtp_stream;
95typedef unsigned int (*amdtp_stream_process_data_blocks_t)(
96 struct amdtp_stream *s,
97 __be32 *buffer,
98 unsigned int data_blocks,
99 unsigned int *syt);
100struct amdtp_stream {
101 struct fw_unit *unit;
102 enum cip_flags flags;
103 enum amdtp_stream_direction direction;
104 struct mutex mutex;
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107 struct fw_iso_context *context;
108 struct iso_packets_buffer buffer;
109 int packet_index;
110 int tag;
111 union {
112 struct {
113 unsigned int ctx_header_size;
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116 unsigned int max_ctx_payload_length;
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120
121 unsigned int dbc_interval;
122
123 unsigned int first_dbc;
124 } tx;
125 struct {
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127 unsigned int transfer_delay;
128 unsigned int data_block_state;
129 unsigned int last_syt_offset;
130 unsigned int syt_offset_state;
131
132
133 unsigned int fdf;
134 } rx;
135 } ctx_data;
136
137
138 unsigned int source_node_id_field;
139 unsigned int data_block_quadlets;
140 unsigned int data_block_counter;
141 unsigned int sph;
142 unsigned int fmt;
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145 enum cip_sfc sfc;
146 unsigned int syt_interval;
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149 struct snd_pcm_substream *pcm;
150 struct tasklet_struct period_tasklet;
151 snd_pcm_uframes_t pcm_buffer_pointer;
152 unsigned int pcm_period_pointer;
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154
155 bool callbacked;
156 wait_queue_head_t callback_wait;
157 u32 start_cycle;
158
159
160 void *protocol;
161 amdtp_stream_process_data_blocks_t process_data_blocks;
162};
163
164int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
165 enum amdtp_stream_direction dir, enum cip_flags flags,
166 unsigned int fmt,
167 amdtp_stream_process_data_blocks_t process_data_blocks,
168 unsigned int protocol_size);
169void amdtp_stream_destroy(struct amdtp_stream *s);
170
171int amdtp_stream_set_parameters(struct amdtp_stream *s, unsigned int rate,
172 unsigned int data_block_quadlets);
173unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s);
174
175int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed);
176void amdtp_stream_update(struct amdtp_stream *s);
177void amdtp_stream_stop(struct amdtp_stream *s);
178
179int amdtp_stream_add_pcm_hw_constraints(struct amdtp_stream *s,
180 struct snd_pcm_runtime *runtime);
181
182void amdtp_stream_pcm_prepare(struct amdtp_stream *s);
183unsigned long amdtp_stream_pcm_pointer(struct amdtp_stream *s);
184int amdtp_stream_pcm_ack(struct amdtp_stream *s);
185void amdtp_stream_pcm_abort(struct amdtp_stream *s);
186
187extern const unsigned int amdtp_syt_intervals[CIP_SFC_COUNT];
188extern const unsigned int amdtp_rate_table[CIP_SFC_COUNT];
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196static inline bool amdtp_stream_running(struct amdtp_stream *s)
197{
198 return !IS_ERR(s->context);
199}
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208static inline bool amdtp_streaming_error(struct amdtp_stream *s)
209{
210 return s->packet_index < 0;
211}
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219static inline bool amdtp_stream_pcm_running(struct amdtp_stream *s)
220{
221 return !!s->pcm;
222}
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233static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s,
234 struct snd_pcm_substream *pcm)
235{
236 WRITE_ONCE(s->pcm, pcm);
237}
238
239static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc)
240{
241 return sfc & 1;
242}
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251static inline bool amdtp_stream_wait_callback(struct amdtp_stream *s,
252 unsigned int timeout)
253{
254 return wait_event_timeout(s->callback_wait,
255 s->callbacked == true,
256 msecs_to_jiffies(timeout)) > 0;
257}
258
259#endif
260