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hc
2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/sound/firewire/fireface/amdtp-ff.c
....@@ -1,9 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * amdtp-ff.c - a part of driver for RME Fireface series
34  *
45  * Copyright (c) 2015-2017 Takashi Sakamoto
5
- *
6
- * Licensed under the terms of the GNU General Public License, version 2.
76  */
87 
98 #include <sound/pcm.h>
....@@ -28,19 +27,24 @@
2827 	return amdtp_stream_set_parameters(s, rate, data_channels);
2928 }
3029 
31
-static void write_pcm_s32(struct amdtp_stream *s,
32
-			  struct snd_pcm_substream *pcm,
33
-			  __le32 *buffer, unsigned int frames)
30
+static void write_pcm_s32(struct amdtp_stream *s, struct snd_pcm_substream *pcm,
31
+			  __le32 *buffer, unsigned int frames,
32
+			  unsigned int pcm_frames)
3433 {
3534 	struct amdtp_ff *p = s->protocol;
35
+	unsigned int channels = p->pcm_channels;
3636 	struct snd_pcm_runtime *runtime = pcm->runtime;
37
-	unsigned int channels, remaining_frames, i, c;
37
+	unsigned int pcm_buffer_pointer;
38
+	int remaining_frames;
3839 	const u32 *src;
40
+	int i, c;
3941 
40
-	channels = p->pcm_channels;
42
+	pcm_buffer_pointer = s->pcm_buffer_pointer + pcm_frames;
43
+	pcm_buffer_pointer %= runtime->buffer_size;
44
+
4145 	src = (void *)runtime->dma_area +
42
-			frames_to_bytes(runtime, s->pcm_buffer_pointer);
43
-	remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
46
+				frames_to_bytes(runtime, pcm_buffer_pointer);
47
+	remaining_frames = runtime->buffer_size - pcm_buffer_pointer;
4448 
4549 	for (i = 0; i < frames; ++i) {
4650 		for (c = 0; c < channels; ++c) {
....@@ -53,19 +57,24 @@
5357 	}
5458 }
5559 
56
-static void read_pcm_s32(struct amdtp_stream *s,
57
-			 struct snd_pcm_substream *pcm,
58
-			 __le32 *buffer, unsigned int frames)
60
+static void read_pcm_s32(struct amdtp_stream *s, struct snd_pcm_substream *pcm,
61
+			 __le32 *buffer, unsigned int frames,
62
+			 unsigned int pcm_frames)
5963 {
6064 	struct amdtp_ff *p = s->protocol;
65
+	unsigned int channels = p->pcm_channels;
6166 	struct snd_pcm_runtime *runtime = pcm->runtime;
62
-	unsigned int channels, remaining_frames, i, c;
67
+	unsigned int pcm_buffer_pointer;
68
+	int remaining_frames;
6369 	u32 *dst;
70
+	int i, c;
6471 
65
-	channels = p->pcm_channels;
72
+	pcm_buffer_pointer = s->pcm_buffer_pointer + pcm_frames;
73
+	pcm_buffer_pointer %= runtime->buffer_size;
74
+
6675 	dst  = (void *)runtime->dma_area +
67
-			frames_to_bytes(runtime, s->pcm_buffer_pointer);
68
-	remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
76
+				frames_to_bytes(runtime, pcm_buffer_pointer);
77
+	remaining_frames = runtime->buffer_size - pcm_buffer_pointer;
6978 
7079 	for (i = 0; i < frames; ++i) {
7180 		for (c = 0; c < channels; ++c) {
....@@ -103,38 +112,47 @@
103112 	return amdtp_stream_add_pcm_hw_constraints(s, runtime);
104113 }
105114 
106
-static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
107
-					   __be32 *buffer,
108
-					   unsigned int data_blocks,
109
-					   unsigned int *syt)
115
+static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
116
+					   const struct pkt_desc *descs,
117
+					   unsigned int packets,
118
+					   struct snd_pcm_substream *pcm)
110119 {
111
-	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
112
-	unsigned int pcm_frames;
120
+	unsigned int pcm_frames = 0;
121
+	int i;
113122 
114
-	if (pcm) {
115
-		write_pcm_s32(s, pcm, (__le32 *)buffer, data_blocks);
116
-		pcm_frames = data_blocks;
117
-	} else {
118
-		write_pcm_silence(s, (__le32 *)buffer, data_blocks);
119
-		pcm_frames = 0;
123
+	for (i = 0; i < packets; ++i) {
124
+		const struct pkt_desc *desc = descs + i;
125
+		__le32 *buf = (__le32 *)desc->ctx_payload;
126
+		unsigned int data_blocks = desc->data_blocks;
127
+
128
+		if (pcm) {
129
+			write_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
130
+			pcm_frames += data_blocks;
131
+		} else {
132
+			write_pcm_silence(s, buf, data_blocks);
133
+		}
120134 	}
121135 
122136 	return pcm_frames;
123137 }
124138 
125
-static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
126
-					   __be32 *buffer,
127
-					   unsigned int data_blocks,
128
-					   unsigned int *syt)
139
+static unsigned int process_ir_ctx_payloads(struct amdtp_stream *s,
140
+					    const struct pkt_desc *descs,
141
+					    unsigned int packets,
142
+					    struct snd_pcm_substream *pcm)
129143 {
130
-	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
131
-	unsigned int pcm_frames;
144
+	unsigned int pcm_frames = 0;
145
+	int i;
132146 
133
-	if (pcm) {
134
-		read_pcm_s32(s, pcm, (__le32 *)buffer, data_blocks);
135
-		pcm_frames = data_blocks;
136
-	} else {
137
-		pcm_frames = 0;
147
+	for (i = 0; i < packets; ++i) {
148
+		const struct pkt_desc *desc = descs + i;
149
+		__le32 *buf = (__le32 *)desc->ctx_payload;
150
+		unsigned int data_blocks = desc->data_blocks;
151
+
152
+		if (pcm) {
153
+			read_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
154
+			pcm_frames += data_blocks;
155
+		}
138156 	}
139157 
140158 	return pcm_frames;
....@@ -143,13 +161,13 @@
143161 int amdtp_ff_init(struct amdtp_stream *s, struct fw_unit *unit,
144162 		  enum amdtp_stream_direction dir)
145163 {
146
-	amdtp_stream_process_data_blocks_t process_data_blocks;
164
+	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
147165 
148166 	if (dir == AMDTP_IN_STREAM)
149
-		process_data_blocks = process_tx_data_blocks;
167
+		process_ctx_payloads = process_ir_ctx_payloads;
150168 	else
151
-		process_data_blocks = process_rx_data_blocks;
169
+		process_ctx_payloads = process_it_ctx_payloads;
152170 
153171 	return amdtp_stream_init(s, unit, dir, CIP_NO_HEADER, 0,
154
-				 process_data_blocks, sizeof(struct amdtp_ff));
172
+				 process_ctx_payloads, sizeof(struct amdtp_ff));
155173 }