1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * dice-extension.c - a part of driver for DICE based devices
4 *
5 * Copyright (c) 2018 Takashi Sakamoto
6 */
7
8 #include "dice.h"
9
10 /* For TCD2210/2220, TCAT defines extension of application protocol. */
11
12 #define DICE_EXT_APP_SPACE 0xffffe0200000uLL
13
14 #define DICE_EXT_APP_CAPS_OFFSET 0x00
15 #define DICE_EXT_APP_CAPS_SIZE 0x04
16 #define DICE_EXT_APP_CMD_OFFSET 0x08
17 #define DICE_EXT_APP_CMD_SIZE 0x0c
18 #define DICE_EXT_APP_MIXER_OFFSET 0x10
19 #define DICE_EXT_APP_MIXER_SIZE 0x14
20 #define DICE_EXT_APP_PEAK_OFFSET 0x18
21 #define DICE_EXT_APP_PEAK_SIZE 0x1c
22 #define DICE_EXT_APP_ROUTER_OFFSET 0x20
23 #define DICE_EXT_APP_ROUTER_SIZE 0x24
24 #define DICE_EXT_APP_STREAM_OFFSET 0x28
25 #define DICE_EXT_APP_STREAM_SIZE 0x2c
26 #define DICE_EXT_APP_CURRENT_OFFSET 0x30
27 #define DICE_EXT_APP_CURRENT_SIZE 0x34
28 #define DICE_EXT_APP_STANDALONE_OFFSET 0x38
29 #define DICE_EXT_APP_STANDALONE_SIZE 0x3c
30 #define DICE_EXT_APP_APPLICATION_OFFSET 0x40
31 #define DICE_EXT_APP_APPLICATION_SIZE 0x44
32
33 #define EXT_APP_STREAM_TX_NUMBER 0x0000
34 #define EXT_APP_STREAM_RX_NUMBER 0x0004
35 #define EXT_APP_STREAM_ENTRIES 0x0008
36 #define EXT_APP_STREAM_ENTRY_SIZE 0x010c
37 #define EXT_APP_NUMBER_AUDIO 0x0000
38 #define EXT_APP_NUMBER_MIDI 0x0004
39 #define EXT_APP_NAMES 0x0008
40 #define EXT_APP_NAMES_SIZE 256
41 #define EXT_APP_AC3 0x0108
42
43 #define EXT_APP_CONFIG_LOW_ROUTER 0x0000
44 #define EXT_APP_CONFIG_LOW_STREAM 0x1000
45 #define EXT_APP_CONFIG_MIDDLE_ROUTER 0x2000
46 #define EXT_APP_CONFIG_MIDDLE_STREAM 0x3000
47 #define EXT_APP_CONFIG_HIGH_ROUTER 0x4000
48 #define EXT_APP_CONFIG_HIGH_STREAM 0x5000
49
50 static inline int read_transaction(struct snd_dice *dice, u64 section_addr,
51 u32 offset, void *buf, size_t len)
52 {
53 return snd_fw_transaction(dice->unit,
54 len == 4 ? TCODE_READ_QUADLET_REQUEST :
55 TCODE_READ_BLOCK_REQUEST,
56 section_addr + offset, buf, len, 0);
57 }
58
59 static int read_stream_entries(struct snd_dice *dice, u64 section_addr,
60 u32 base_offset, unsigned int stream_count,
61 unsigned int mode,
62 unsigned int pcm_channels[MAX_STREAMS][3],
63 unsigned int midi_ports[MAX_STREAMS])
64 {
65 u32 entry_offset;
66 __be32 reg[2];
67 int err;
68 int i;
69
70 for (i = 0; i < stream_count; ++i) {
71 entry_offset = base_offset + i * EXT_APP_STREAM_ENTRY_SIZE;
72 err = read_transaction(dice, section_addr,
73 entry_offset + EXT_APP_NUMBER_AUDIO,
74 reg, sizeof(reg));
75 if (err < 0)
76 return err;
77 pcm_channels[i][mode] = be32_to_cpu(reg[0]);
78 midi_ports[i] = max(midi_ports[i], be32_to_cpu(reg[1]));
79 }
80
81 return 0;
82 }
83
84 static int detect_stream_formats(struct snd_dice *dice, u64 section_addr)
85 {
86 u32 base_offset;
87 __be32 reg[2];
88 unsigned int stream_count;
89 int mode;
90 int err = 0;
91
92 for (mode = 0; mode < SND_DICE_RATE_MODE_COUNT; ++mode) {
93 unsigned int cap;
94
95 /*
96 * Some models report stream formats at highest mode, however
97 * they don't support the mode. Check clock capabilities.
98 */
99 if (mode == 2) {
100 cap = CLOCK_CAP_RATE_176400 | CLOCK_CAP_RATE_192000;
101 } else if (mode == 1) {
102 cap = CLOCK_CAP_RATE_88200 | CLOCK_CAP_RATE_96000;
103 } else {
104 cap = CLOCK_CAP_RATE_32000 | CLOCK_CAP_RATE_44100 |
105 CLOCK_CAP_RATE_48000;
106 }
107 if (!(cap & dice->clock_caps))
108 continue;
109
110 base_offset = 0x2000 * mode + 0x1000;
111
112 err = read_transaction(dice, section_addr,
113 base_offset + EXT_APP_STREAM_TX_NUMBER,
114 ®, sizeof(reg));
115 if (err < 0)
116 break;
117
118 base_offset += EXT_APP_STREAM_ENTRIES;
119 stream_count = be32_to_cpu(reg[0]);
120 err = read_stream_entries(dice, section_addr, base_offset,
121 stream_count, mode,
122 dice->tx_pcm_chs,
123 dice->tx_midi_ports);
124 if (err < 0)
125 break;
126
127 base_offset += stream_count * EXT_APP_STREAM_ENTRY_SIZE;
128 stream_count = be32_to_cpu(reg[1]);
129 err = read_stream_entries(dice, section_addr, base_offset,
130 stream_count,
131 mode, dice->rx_pcm_chs,
132 dice->rx_midi_ports);
133 if (err < 0)
134 break;
135 }
136
137 return err;
138 }
139
140 int snd_dice_detect_extension_formats(struct snd_dice *dice)
141 {
142 __be32 *pointers;
143 unsigned int i;
144 u64 section_addr;
145 int err;
146
147 pointers = kmalloc_array(9, sizeof(__be32) * 2, GFP_KERNEL);
148 if (pointers == NULL)
149 return -ENOMEM;
150
151 err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST,
152 DICE_EXT_APP_SPACE, pointers,
153 9 * sizeof(__be32) * 2, 0);
154 if (err < 0)
155 goto end;
156
157 /* Check two of them for offset have the same value or not. */
158 for (i = 0; i < 9; ++i) {
159 int j;
160
161 for (j = i + 1; j < 9; ++j) {
162 if (pointers[i * 2] == pointers[j * 2]) {
163 // Fallback to limited functionality.
164 err = -ENXIO;
165 goto end;
166 }
167 }
168 }
169
170 section_addr = DICE_EXT_APP_SPACE + be32_to_cpu(pointers[12]) * 4;
171 err = detect_stream_formats(dice, section_addr);
172 end:
173 kfree(pointers);
174 return err;
175 }
176
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