1 // SPDX-License-Identifier: LGPL-2.1-or-later
2 /************************************************************************
3
4 This file is part of Echo Digital Audio's generic driver library.
5 Copyright Echo Digital Audio Corporation (c) 1998 - 2005
6 All rights reserved
7 www.echoaudio.com
8
9 Translation from C++ and adaptation for use in ALSA-Driver
10 were made by Giuliano Pochini <pochini@shiny.it>
11
12 *************************************************************************/
13
set_sample_rate(struct echoaudio * chip,u32 rate)14 static int set_sample_rate(struct echoaudio *chip, u32 rate)
15 {
16 u32 clock, control_reg, old_control_reg;
17
18 if (wait_handshake(chip))
19 return -EIO;
20
21 old_control_reg = le32_to_cpu(chip->comm_page->control_register);
22 control_reg = old_control_reg & ~INDIGO_EXPRESS_CLOCK_MASK;
23
24 switch (rate) {
25 case 32000:
26 clock = INDIGO_EXPRESS_32000;
27 break;
28 case 44100:
29 clock = INDIGO_EXPRESS_44100;
30 break;
31 case 48000:
32 clock = INDIGO_EXPRESS_48000;
33 break;
34 case 64000:
35 clock = INDIGO_EXPRESS_32000|INDIGO_EXPRESS_DOUBLE_SPEED;
36 break;
37 case 88200:
38 clock = INDIGO_EXPRESS_44100|INDIGO_EXPRESS_DOUBLE_SPEED;
39 break;
40 case 96000:
41 clock = INDIGO_EXPRESS_48000|INDIGO_EXPRESS_DOUBLE_SPEED;
42 break;
43 default:
44 return -EINVAL;
45 }
46
47 control_reg |= clock;
48 if (control_reg != old_control_reg) {
49 dev_dbg(chip->card->dev,
50 "set_sample_rate: %d clock %d\n", rate, clock);
51 chip->comm_page->control_register = cpu_to_le32(control_reg);
52 chip->sample_rate = rate;
53 clear_handshake(chip);
54 return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
55 }
56 return 0;
57 }
58
59
60
61 /* This function routes the sound from a virtual channel to a real output */
set_vmixer_gain(struct echoaudio * chip,u16 output,u16 pipe,int gain)62 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
63 int gain)
64 {
65 int index;
66
67 if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
68 output >= num_busses_out(chip)))
69 return -EINVAL;
70
71 if (wait_handshake(chip))
72 return -EIO;
73
74 chip->vmixer_gain[output][pipe] = gain;
75 index = output * num_pipes_out(chip) + pipe;
76 chip->comm_page->vmixer[index] = gain;
77
78 dev_dbg(chip->card->dev,
79 "set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
80 return 0;
81 }
82
83
84
85 /* Tell the DSP to read and update virtual mixer levels in comm page. */
update_vmixer_level(struct echoaudio * chip)86 static int update_vmixer_level(struct echoaudio *chip)
87 {
88 if (wait_handshake(chip))
89 return -EIO;
90 clear_handshake(chip);
91 return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
92 }
93
94
95
detect_input_clocks(const struct echoaudio * chip)96 static u32 detect_input_clocks(const struct echoaudio *chip)
97 {
98 return ECHO_CLOCK_BIT_INTERNAL;
99 }
100
101
102
103 /* The IndigoIO has no ASIC. Just do nothing */
load_asic(struct echoaudio * chip)104 static int load_asic(struct echoaudio *chip)
105 {
106 return 0;
107 }
108