| Giuliano Pochini | a2328d0 | 2009-03-19 00:09:03 +0100 | [diff] [blame] | 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 | chip->comm_page->control_register = cpu_to_le32(control_reg); |
| 65 | chip->sample_rate = rate; |
| 66 | clear_handshake(chip); |
| 67 | return send_vector(chip, DSP_VC_UPDATE_CLOCKS); |
| 68 | } |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | |
| 73 | |
| 74 | /* This function routes the sound from a virtual channel to a real output */ |
| 75 | static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe, |
| 76 | int gain) |
| 77 | { |
| 78 | int index; |
| 79 | |
| 80 | if (snd_BUG_ON(pipe >= num_pipes_out(chip) || |
| 81 | output >= num_busses_out(chip))) |
| 82 | return -EINVAL; |
| 83 | |
| 84 | if (wait_handshake(chip)) |
| 85 | return -EIO; |
| 86 | |
| 87 | chip->vmixer_gain[output][pipe] = gain; |
| 88 | index = output * num_pipes_out(chip) + pipe; |
| 89 | chip->comm_page->vmixer[index] = gain; |
| 90 | |
| 91 | DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain)); |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | |
| 96 | |
| 97 | /* Tell the DSP to read and update virtual mixer levels in comm page. */ |
| 98 | static int update_vmixer_level(struct echoaudio *chip) |
| 99 | { |
| 100 | if (wait_handshake(chip)) |
| 101 | return -EIO; |
| 102 | clear_handshake(chip); |
| 103 | return send_vector(chip, DSP_VC_SET_VMIXER_GAIN); |
| 104 | } |
| 105 | |
| 106 | |
| 107 | |
| 108 | static u32 detect_input_clocks(const struct echoaudio *chip) |
| 109 | { |
| 110 | return ECHO_CLOCK_BIT_INTERNAL; |
| 111 | } |
| 112 | |
| 113 | |
| 114 | |
| 115 | /* The IndigoIO has no ASIC. Just do nothing */ |
| 116 | static int load_asic(struct echoaudio *chip) |
| 117 | { |
| 118 | return 0; |
| 119 | } |