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         DE_INIT(("init_hw() - Darla20\n"));
  37         snd_assert((subdevice_id & 0xfff0) == DARLA20, return -ENODEV);
  38
  39         if ((err = init_dsp_comm_page(chip))) {
  40                 DE_INIT(("init_hw - could not initialize DSP comm page\n"));
  41                 return err;
  42         }
  43
  44         chip->device_id = device_id;
  45         chip->subdevice_id = subdevice_id;
  46         chip->bad_board = TRUE;
  47         chip->dsp_code_to_load = &card_fw[FW_DARLA20_DSP];
  48         chip->spdif_status = GD_SPDIF_STATUS_UNDEF;
  49         chip->clock_state = GD_CLOCK_UNDEF;
  50         /* Since this card has no ASIC, mark it as loaded so everything
  51            works OK */
  52         chip->asic_loaded = TRUE;
  53         chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
  54
  55         if ((err = load_firmware(chip)) < 0)
  56                 return err;
  57         chip->bad_board = FALSE;
  58
  59         if ((err = init_line_levels(chip)) < 0)
  60                 return err;
  61
  62         DE_INIT(("init_hw done\n"));
  63         return err;
  64 }
  65
  66
  67
  68 /* The Darla20 has no external clock sources */
  69 static u32 detect_input_clocks(const struct echoaudio *chip)
  70 {
  71         return ECHO_CLOCK_BIT_INTERNAL;
  72 }
  73
  74
  75
  76 /* The Darla20 has no ASIC. Just do nothing */
  77 static int load_asic(struct echoaudio *chip)
  78 {
  79         return 0;
  80 }
  81
  82
  83
  84 static int set_sample_rate(struct echoaudio *chip, u32 rate)
  85 {
  86         u8 clock_state, spdif_status;
  87
  88         if (wait_handshake(chip))
  89                 return -EIO;
  90
  91         switch (rate) {
  92         case 44100:
  93                 clock_state = GD_CLOCK_44;
  94                 spdif_status = GD_SPDIF_STATUS_44;
  95                 break;
  96         case 48000:
  97                 clock_state = GD_CLOCK_48;
  98                 spdif_status = GD_SPDIF_STATUS_48;
  99                 break;
 100         default:
 101                 clock_state = GD_CLOCK_NOCHANGE;
 102                 spdif_status = GD_SPDIF_STATUS_NOCHANGE;
 103                 break;
 104         }
 105
 106         if (chip->clock_state == clock_state)
 107                 clock_state = GD_CLOCK_NOCHANGE;
 108         if (spdif_status == chip->spdif_status)
 109                 spdif_status = GD_SPDIF_STATUS_NOCHANGE;
 110
 111         chip->comm_page->sample_rate = cpu_to_le32(rate);
 112         chip->comm_page->gd_clock_state = clock_state;
 113         chip->comm_page->gd_spdif_status = spdif_status;
 114         chip->comm_page->gd_resampler_state = 3;        /* magic number - should always be 3 */
 115
 116         /* Save the new audio state if it changed */
 117         if (clock_state != GD_CLOCK_NOCHANGE)
 118                 chip->clock_state = clock_state;
 119         if (spdif_status != GD_SPDIF_STATUS_NOCHANGE)
 120                 chip->spdif_status = spdif_status;
 121         chip->sample_rate = rate;
 122
 123         clear_handshake(chip);
 124         return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
 125 }