release/src-rt-6.x.4708/linux/linux-2.6.36/sound/pci/echoaudio/darla24_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() - Darla24\n"));
  37         if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA24))
  38                 return -ENODEV;
  39
  40         if ((err = init_dsp_comm_page(chip))) {
  41                 DE_INIT(("init_hw - could not initialize DSP comm page\n"));
  42                 return err;
  43         }
  44
  45         chip->device_id = device_id;
  46         chip->subdevice_id = subdevice_id;
  47         chip->bad_board = TRUE;
  48         chip->dsp_code_to_load = FW_DARLA24_DSP;
  49         /* Since this card has no ASIC, mark it as loaded so everything
  50            works OK */
  51         chip->asic_loaded = TRUE;
  52         chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
  53                 ECHO_CLOCK_BIT_ESYNC;
  54
  55         if ((err = load_firmware(chip)) < 0)
  56                 return err;
  57         chip->bad_board = FALSE;
  58
  59         DE_INIT(("init_hw done\n"));
  60         return err;
  61 }
  62
  63
  64
  65 static int set_mixer_defaults(struct echoaudio *chip)
  66 {
  67         return init_line_levels(chip);
  68 }
  69
  70
  71
  72 static u32 detect_input_clocks(const struct echoaudio *chip)
  73 {
  74         u32 clocks_from_dsp, clock_bits;
  75
  76         /* Map the DSP clock detect bits to the generic driver clock
  77            detect bits */
  78         clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
  79
  80         clock_bits = ECHO_CLOCK_BIT_INTERNAL;
  81
  82         if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_ESYNC)
  83                 clock_bits |= ECHO_CLOCK_BIT_ESYNC;
  84
  85         return clock_bits;
  86 }
  87
  88
  89
  90 /* The Darla24 has no ASIC. Just do nothing */
  91 static int load_asic(struct echoaudio *chip)
  92 {
  93         return 0;
  94 }
  95
  96
  97
  98 static int set_sample_rate(struct echoaudio *chip, u32 rate)
  99 {
 100         u8 clock;
 101
 102         switch (rate) {
 103         case 96000:
 104                 clock = GD24_96000;
 105                 break;
 106         case 88200:
 107                 clock = GD24_88200;
 108                 break;
 109         case 48000:
 110                 clock = GD24_48000;
 111                 break;
 112         case 44100:
 113                 clock = GD24_44100;
 114                 break;
 115         case 32000:
 116                 clock = GD24_32000;
 117                 break;
 118         case 22050:
 119                 clock = GD24_22050;
 120                 break;
 121         case 16000:
 122                 clock = GD24_16000;
 123                 break;
 124         case 11025:
 125                 clock = GD24_11025;
 126                 break;
 127         case 8000:
 128                 clock = GD24_8000;
 129                 break;
 130         default:
 131                 DE_ACT(("set_sample_rate: Error, invalid sample rate %d\n",
 132                         rate));
 133                 return -EINVAL;
 134         }
 135
 136         if (wait_handshake(chip))
 137                 return -EIO;
 138
 139         DE_ACT(("set_sample_rate: %d clock %d\n", rate, clock));
 140         chip->sample_rate = rate;
 141
 142         /* Override the sample rate if this card is set to Echo sync. */
 143         if (chip->input_clock == ECHO_CLOCK_ESYNC)
 144                 clock = GD24_EXT_SYNC;
 145
 146         chip->comm_page->sample_rate = cpu_to_le32(rate);       /* ignored by the DSP ? */
 147         chip->comm_page->gd_clock_state = clock;
 148         clear_handshake(chip);
 149         return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
 150 }
 151
 152
 153
 154 static int set_input_clock(struct echoaudio *chip, u16 clock)
 155 {
 156         if (snd_BUG_ON(clock != ECHO_CLOCK_INTERNAL &&
 157                        clock != ECHO_CLOCK_ESYNC))
 158                 return -EINVAL;
 159         chip->input_clock = clock;
 160         return set_sample_rate(chip, chip->sample_rate);
 161 }