root/sound/pci/echoaudio/indigoio_dsp.c

DEFINITIONS

1. init_hw
2. set_mixer_defaults
3. detect_input_clocks
4. load_asic
5. set_sample_rate
6. set_vmixer_gain
7. update_vmixer_level

   1 /****************************************************************************
   2 
   3    Copyright Echo Digital Audio Corporation (c) 1998 - 2004
   4    All rights reserved
   5    www.echoaudio.com
   6 
   7    This file is part of Echo Digital Audio's generic driver library.
   8 
   9    Echo Digital Audio's generic driver library is free software;
  10    you can redistribute it and/or modify it under the terms of
  11    the GNU General Public License as published by the Free Software
  12    Foundation.
  13 
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18 
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  22    MA  02111-1307, USA.
  23 
  24    *************************************************************************
  25 
  26  Translation from C++ and adaptation for use in ALSA-Driver
  27  were made by Giuliano Pochini <pochini@shiny.it>
  28 
  29 ****************************************************************************/
  30 
  31 
  32 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
  33                            int gain);
  34 static int update_vmixer_level(struct echoaudio *chip);
  35 
  36 
  37 static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
  38 {
  39         int err;
  40 
  41         if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO_IO))
  42                 return -ENODEV;
  43 
  44         if ((err = init_dsp_comm_page(chip))) {
  45                 dev_err(chip->card->dev,
  46                         "init_hw - could not initialize DSP comm page\n");
  47                 return err;
  48         }
  49 
  50         chip->device_id = device_id;
  51         chip->subdevice_id = subdevice_id;
  52         chip->bad_board = true;
  53         chip->dsp_code_to_load = FW_INDIGO_IO_DSP;
  54         /* Since this card has no ASIC, mark it as loaded so everything
  55            works OK */
  56         chip->asic_loaded = true;
  57         chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
  58 
  59         if ((err = load_firmware(chip)) < 0)
  60                 return err;
  61         chip->bad_board = false;
  62 
  63         return err;
  64 }
  65 
  66 
  67 
  68 static int set_mixer_defaults(struct echoaudio *chip)
  69 {
  70         return init_line_levels(chip);
  71 }
  72 
  73 
  74 
  75 static u32 detect_input_clocks(const struct echoaudio *chip)
  76 {
  77         return ECHO_CLOCK_BIT_INTERNAL;
  78 }
  79 
  80 
  81 
  82 /* The IndigoIO has no ASIC. Just do nothing */
  83 static int load_asic(struct echoaudio *chip)
  84 {
  85         return 0;
  86 }
  87 
  88 
  89 
  90 static int set_sample_rate(struct echoaudio *chip, u32 rate)
  91 {
  92         if (wait_handshake(chip))
  93                 return -EIO;
  94 
  95         chip->sample_rate = rate;
  96         chip->comm_page->sample_rate = cpu_to_le32(rate);
  97         clear_handshake(chip);
  98         return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
  99 }
 100 
 101 
 102 
 103 /* This function routes the sound from a virtual channel to a real output */
 104 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
 105                            int gain)
 106 {
 107         int index;
 108 
 109         if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
 110                        output >= num_busses_out(chip)))
 111                 return -EINVAL;
 112 
 113         if (wait_handshake(chip))
 114                 return -EIO;
 115 
 116         chip->vmixer_gain[output][pipe] = gain;
 117         index = output * num_pipes_out(chip) + pipe;
 118         chip->comm_page->vmixer[index] = gain;
 119 
 120         dev_dbg(chip->card->dev,
 121                 "set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
 122         return 0;
 123 }
 124 
 125 
 126 
 127 /* Tell the DSP to read and update virtual mixer levels in comm page. */
 128 static int update_vmixer_level(struct echoaudio *chip)
 129 {
 130         if (wait_handshake(chip))
 131                 return -EIO;
 132         clear_handshake(chip);
 133         return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
 134 }
 135