LXR linux/sound/pci/echoaudio/indigo_express

   1/************************************************************************
   2
   3This file is part of Echo Digital Audio's generic driver library.
   4Copyright Echo Digital Audio Corporation (c) 1998 - 2005
   5All rights reserved
   6www.echoaudio.com
   7
   8This library is free software; you can redistribute it and/or
   9modify it under the terms of the GNU Lesser General Public
  10License as published by the Free Software Foundation; either
  11version 2.1 of the License, or (at your option) any later version.
  12
  13This library is distributed in the hope that it will be useful,
  14but WITHOUT ANY WARRANTY; without even the implied warranty of
  15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16Lesser General Public License for more details.
  17
  18You should have received a copy of the GNU Lesser General Public
  19License along with this library; if not, write to the Free Software
  20Foundation, 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
  29static 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                DE_ACT(("set_sample_rate: %d clock %d\n", rate, clock));
  65                chip->comm_page->control_register = cpu_to_le32(control_reg);
  66                chip->sample_rate = rate;
  67                clear_handshake(chip);
  68                return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
  69        }
  70        return 0;
  71}
  72
  73
  74
  75/* This function routes the sound from a virtual channel to a real output */
  76static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
  77                           int gain)
  78{
  79        int index;
  80
  81        if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
  82                       output >= num_busses_out(chip)))
  83                return -EINVAL;
  84
  85        if (wait_handshake(chip))
  86                return -EIO;
  87
  88        chip->vmixer_gain[output][pipe] = gain;
  89        index = output * num_pipes_out(chip) + pipe;
  90        chip->comm_page->vmixer[index] = gain;
  91
  92        DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain));
  93        return 0;
  94}
  95
  96
  97
  98/* Tell the DSP to read and update virtual mixer levels in comm page. */
  99static int update_vmixer_level(struct echoaudio *chip)
 100{
 101        if (wait_handshake(chip))
 102                return -EIO;
 103        clear_handshake(chip);
 104        return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
 105}
 106
 107
 108
 109static u32 detect_input_clocks(const struct echoaudio *chip)
 110{
 111        return ECHO_CLOCK_BIT_INTERNAL;
 112}
 113
 114
 115
 116/* The IndigoIO has no ASIC. Just do nothing */
 117static int load_asic(struct echoaudio *chip)
 118{
 119        return 0;
 120}
 121