kernel/2.6.29.6-aldebaran-rt/sound/pci/echoaudio/indigo_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 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         DE_INIT(("init_hw() - Indigo\n"));
  42         if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO))
  43                 return -ENODEV;
  44
  45         if ((err = init_dsp_comm_page(chip))) {
  46                 DE_INIT(("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 = &card_fw[FW_INDIGO_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         if ((err = init_line_levels(chip)) < 0)
  64                 return err;
  65
  66         /* Default routing of the virtual channels: all vchannels are routed
  67         to the stereo output */
  68         set_vmixer_gain(chip, 0, 0, 0);
  69         set_vmixer_gain(chip, 1, 1, 0);
  70         set_vmixer_gain(chip, 0, 2, 0);
  71         set_vmixer_gain(chip, 1, 3, 0);
  72         set_vmixer_gain(chip, 0, 4, 0);
  73         set_vmixer_gain(chip, 1, 5, 0);
  74         set_vmixer_gain(chip, 0, 6, 0);
  75         set_vmixer_gain(chip, 1, 7, 0);
  76         err = update_vmixer_level(chip);
  77
  78         DE_INIT(("init_hw done\n"));
  79         return err;
  80 }
  81
  82
  83
  84 static u32 detect_input_clocks(const struct echoaudio *chip)
  85 {
  86         return ECHO_CLOCK_BIT_INTERNAL;
  87 }
  88
  89
  90
  91 /* The Indigo has no ASIC. Just do nothing */
  92 static int load_asic(struct echoaudio *chip)
  93 {
  94         return 0;
  95 }
  96
  97
  98
  99 static int set_sample_rate(struct echoaudio *chip, u32 rate)
 100 {
 101         u32 control_reg;
 102
 103         switch (rate) {
 104         case 96000:
 105                 control_reg = MIA_96000;
 106                 break;
 107         case 88200:
 108                 control_reg = MIA_88200;
 109                 break;
 110         case 48000:
 111                 control_reg = MIA_48000;
 112                 break;
 113         case 44100:
 114                 control_reg = MIA_44100;
 115                 break;
 116         case 32000:
 117                 control_reg = MIA_32000;
 118                 break;
 119         default:
 120                 DE_ACT(("set_sample_rate: %d invalid!\n", rate));
 121                 return -EINVAL;
 122         }
 123
 124         /* Set the control register if it has changed */
 125         if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
 126                 if (wait_handshake(chip))
 127                         return -EIO;
 128
 129                 chip->comm_page->sample_rate = cpu_to_le32(rate);       /* ignored by the DSP */
 130                 chip->comm_page->control_register = cpu_to_le32(control_reg);
 131                 chip->sample_rate = rate;
 132
 133                 clear_handshake(chip);
 134                 return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
 135         }
 136         return 0;
 137 }
 138
 139
 140
 141 /* This function routes the sound from a virtual channel to a real output */
 142 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
 143                            int gain)
 144 {
 145         int index;
 146
 147         if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
 148                        output >= num_busses_out(chip)))
 149                 return -EINVAL;
 150
 151         if (wait_handshake(chip))
 152                 return -EIO;
 153
 154         chip->vmixer_gain[output][pipe] = gain;
 155         index = output * num_pipes_out(chip) + pipe;
 156         chip->comm_page->vmixer[index] = gain;
 157
 158         DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain));
 159         return 0;
 160 }
 161
 162
 163
 164 /* Tell the DSP to read and update virtual mixer levels in comm page. */
 165 static int update_vmixer_level(struct echoaudio *chip)
 166 {
 167         if (wait_handshake(chip))
 168                 return -EIO;
 169         clear_handshake(chip);
 170         return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
 171 }
 172