release/src-rt-6.x.4708/linux/linux-2.6.36/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 = 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         DE_INIT(("init_hw done\n"));
  64         return err;
  65 }
  66
  67
  68
  69 static int set_mixer_defaults(struct echoaudio *chip)
  70 {
  71         return init_line_levels(chip);
  72 }
  73
  74
  75
  76 static u32 detect_input_clocks(const struct echoaudio *chip)
  77 {
  78         return ECHO_CLOCK_BIT_INTERNAL;
  79 }
  80
  81
  82
  83 /* The Indigo has no ASIC. Just do nothing */
  84 static int load_asic(struct echoaudio *chip)
  85 {
  86         return 0;
  87 }
  88
  89
  90
  91 static int set_sample_rate(struct echoaudio *chip, u32 rate)
  92 {
  93         u32 control_reg;
  94
  95         switch (rate) {
  96         case 96000:
  97                 control_reg = MIA_96000;
  98                 break;
  99         case 88200:
 100                 control_reg = MIA_88200;
 101                 break;
 102         case 48000:
 103                 control_reg = MIA_48000;
 104                 break;
 105         case 44100:
 106                 control_reg = MIA_44100;
 107                 break;
 108         case 32000:
 109                 control_reg = MIA_32000;
 110                 break;
 111         default:
 112                 DE_ACT(("set_sample_rate: %d invalid!\n", rate));
 113                 return -EINVAL;
 114         }
 115
 116         /* Set the control register if it has changed */
 117         if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
 118                 if (wait_handshake(chip))
 119                         return -EIO;
 120
 121                 chip->comm_page->sample_rate = cpu_to_le32(rate);       /* ignored by the DSP */
 122                 chip->comm_page->control_register = cpu_to_le32(control_reg);
 123                 chip->sample_rate = rate;
 124
 125                 clear_handshake(chip);
 126                 return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
 127         }
 128         return 0;
 129 }
 130
 131
 132
 133 /* This function routes the sound from a virtual channel to a real output */
 134 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
 135                            int gain)
 136 {
 137         int index;
 138
 139         if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
 140                        output >= num_busses_out(chip)))
 141                 return -EINVAL;
 142
 143         if (wait_handshake(chip))
 144                 return -EIO;
 145
 146         chip->vmixer_gain[output][pipe] = gain;
 147         index = output * num_pipes_out(chip) + pipe;
 148         chip->comm_page->vmixer[index] = gain;
 149
 150         DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain));
 151         return 0;
 152 }
 153
 154
 155
 156 /* Tell the DSP to read and update virtual mixer levels in comm page. */
 157 static int update_vmixer_level(struct echoaudio *chip)
 158 {
 159         if (wait_handshake(chip))
 160                 return -EIO;
 161         clear_handshake(chip);
 162         return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
 163 }