1 | /************************************************************************ |
2 | |
3 | This file is part of Echo Digital Audio's generic driver library. |
4 | Copyright Echo Digital Audio Corporation (c) 1998 - 2005 |
5 | All rights reserved |
6 | www.echoaudio.com |
7 | |
8 | This library is free software; you can redistribute it and/or |
9 | modify it under the terms of the GNU Lesser General Public |
10 | License as published by the Free Software Foundation; either |
11 | version 2.1 of the License, or (at your option) any later version. |
12 | |
13 | This library is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | Lesser General Public License for more details. |
17 | |
18 | You should have received a copy of the GNU Lesser General Public |
19 | License along with this library; if not, write to the Free Software |
20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 | |
22 | ************************************************************************* |
23 | |
24 | Translation from C++ and adaptation for use in ALSA-Driver |
25 | were made by Giuliano Pochini <pochini@shiny.it> |
26 | |
27 | *************************************************************************/ |
28 | |
29 | static int set_sample_rate(struct echoaudio *chip, u32 rate) |
30 | { |
31 | u32 clock, control_reg, old_control_reg; |
32 | |
33 | if (wait_handshake(chip)) |
34 | return -EIO; |
35 | |
36 | old_control_reg = le32_to_cpu(chip->comm_page->control_register); |
37 | control_reg = old_control_reg & ~INDIGO_EXPRESS_CLOCK_MASK; |
38 | |
39 | switch (rate) { |
40 | case 32000: |
41 | clock = INDIGO_EXPRESS_32000; |
42 | break; |
43 | case 44100: |
44 | clock = INDIGO_EXPRESS_44100; |
45 | break; |
46 | case 48000: |
47 | clock = INDIGO_EXPRESS_48000; |
48 | break; |
49 | case 64000: |
50 | clock = INDIGO_EXPRESS_32000|INDIGO_EXPRESS_DOUBLE_SPEED; |
51 | break; |
52 | case 88200: |
53 | clock = INDIGO_EXPRESS_44100|INDIGO_EXPRESS_DOUBLE_SPEED; |
54 | break; |
55 | case 96000: |
56 | clock = INDIGO_EXPRESS_48000|INDIGO_EXPRESS_DOUBLE_SPEED; |
57 | break; |
58 | default: |
59 | return -EINVAL; |
60 | } |
61 | |
62 | control_reg |= clock; |
63 | if (control_reg != old_control_reg) { |
64 | dev_dbg(chip->card->dev, |
65 | "set_sample_rate: %d clock %d\n" , rate, clock); |
66 | chip->comm_page->control_register = cpu_to_le32(control_reg); |
67 | chip->sample_rate = rate; |
68 | clear_handshake(chip); |
69 | return send_vector(chip, DSP_VC_UPDATE_CLOCKS); |
70 | } |
71 | return 0; |
72 | } |
73 | |
74 | |
75 | |
76 | /* This function routes the sound from a virtual channel to a real output */ |
77 | static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe, |
78 | int gain) |
79 | { |
80 | int index; |
81 | |
82 | if (snd_BUG_ON(pipe >= num_pipes_out(chip) || |
83 | output >= num_busses_out(chip))) |
84 | return -EINVAL; |
85 | |
86 | if (wait_handshake(chip)) |
87 | return -EIO; |
88 | |
89 | chip->vmixer_gain[output][pipe] = gain; |
90 | index = output * num_pipes_out(chip) + pipe; |
91 | chip->comm_page->vmixer[index] = gain; |
92 | |
93 | dev_dbg(chip->card->dev, |
94 | "set_vmixer_gain: pipe %d, out %d = %d\n" , pipe, output, gain); |
95 | return 0; |
96 | } |
97 | |
98 | |
99 | |
100 | /* Tell the DSP to read and update virtual mixer levels in comm page. */ |
101 | static int update_vmixer_level(struct echoaudio *chip) |
102 | { |
103 | if (wait_handshake(chip)) |
104 | return -EIO; |
105 | clear_handshake(chip); |
106 | return send_vector(chip, DSP_VC_SET_VMIXER_GAIN); |
107 | } |
108 | |
109 | |
110 | |
111 | static u32 detect_input_clocks(const struct echoaudio *chip) |
112 | { |
113 | return ECHO_CLOCK_BIT_INTERNAL; |
114 | } |
115 | |
116 | |
117 | |
118 | /* The IndigoIO has no ASIC. Just do nothing */ |
119 | static int load_asic(struct echoaudio *chip) |
120 | { |
121 | return 0; |
122 | } |
123 | |