sound/pci/echoaudio/darla20_dsp.c

   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 init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
  33 {
  34         int err;
  35
  36         if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA20))
  37                 return -ENODEV;
  38
  39         err = init_dsp_comm_page(chip);
  40         if (err) {
  41                 dev_err(chip->card->dev,
  42                         "init_hw: could not initialize DSP comm page\n");
  43                 return err;
  44         }
  45
  46         chip->device_id = device_id;
  47         chip->subdevice_id = subdevice_id;
  48         chip->bad_board = true;
  49         chip->dsp_code_to_load = FW_DARLA20_DSP;
  50         chip->spdif_status = GD_SPDIF_STATUS_UNDEF;
  51         chip->clock_state = GD_CLOCK_UNDEF;
  52         /* Since this card has no ASIC, mark it as loaded so everything
  53            works OK */
  54         chip->asic_loaded = true;
  55         chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
  56
  57         err = load_firmware(chip);
  58         if (err < 0)
  59                 return err;
  60         chip->bad_board = false;
  61
  62         return err;
  63 }
  64
  65
  66
  67 static int set_mixer_defaults(struct echoaudio *chip)
  68 {
  69         return init_line_levels(chip);
  70 }
  71
  72
  73
  74 /* The Darla20 has no external clock sources */
  75 static u32 detect_input_clocks(const struct echoaudio *chip)
  76 {
  77         return ECHO_CLOCK_BIT_INTERNAL;
  78 }
  79
  80
  81
  82 /* The Darla20 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         u8 clock_state, spdif_status;
  93
  94         if (wait_handshake(chip))
  95                 return -EIO;
  96
  97         switch (rate) {
  98         case 44100:
  99                 clock_state = GD_CLOCK_44;
 100                 spdif_status = GD_SPDIF_STATUS_44;
 101                 break;
 102         case 48000:
 103                 clock_state = GD_CLOCK_48;
 104                 spdif_status = GD_SPDIF_STATUS_48;
 105                 break;
 106         default:
 107                 clock_state = GD_CLOCK_NOCHANGE;
 108                 spdif_status = GD_SPDIF_STATUS_NOCHANGE;
 109                 break;
 110         }
 111
 112         if (chip->clock_state == clock_state)
 113                 clock_state = GD_CLOCK_NOCHANGE;
 114         if (spdif_status == chip->spdif_status)
 115                 spdif_status = GD_SPDIF_STATUS_NOCHANGE;
 116
 117         chip->comm_page->sample_rate = cpu_to_le32(rate);
 118         chip->comm_page->gd_clock_state = clock_state;
 119         chip->comm_page->gd_spdif_status = spdif_status;
 120         chip->comm_page->gd_resampler_state = 3;        /* magic number - should always be 3 */
 121
 122         /* Save the new audio state if it changed */
 123         if (clock_state != GD_CLOCK_NOCHANGE)
 124                 chip->clock_state = clock_state;
 125         if (spdif_status != GD_SPDIF_STATUS_NOCHANGE)
 126                 chip->spdif_status = spdif_status;
 127         chip->sample_rate = rate;
 128
 129         clear_handshake(chip);
 130         return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
 131 }