release/src-rt-6.x.4708/linux/linux-2.6.36/sound/pci/echoaudio/echoaudio_gml.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 /* These functions are common for Gina24, Layla24 and Mona cards */
  33
  34
  35 /* ASIC status check - some cards have one or two ASICs that need to be
  36 loaded.  Once that load is complete, this function is called to see if
  37 the load was successful.
  38 If this load fails, it does not necessarily mean that the hardware is
  39 defective - the external box may be disconnected or turned off. */
  40 static int check_asic_status(struct echoaudio *chip)
  41 {
  42         u32 asic_status;
  43
  44         send_vector(chip, DSP_VC_TEST_ASIC);
  45
  46         /* The DSP will return a value to indicate whether or not the
  47            ASIC is currently loaded */
  48         if (read_dsp(chip, &asic_status) < 0) {
  49                 DE_INIT(("check_asic_status: failed on read_dsp\n"));
  50                 chip->asic_loaded = FALSE;
  51                 return -EIO;
  52         }
  53
  54         chip->asic_loaded = (asic_status == ASIC_ALREADY_LOADED);
  55         return chip->asic_loaded ? 0 : -EIO;
  56 }
  57
  58
  59
  60 /* Most configuration of Gina24, Layla24, or Mona is accomplished by writing
  61 the control register.  write_control_reg sends the new control register
  62 value to the DSP. */
  63 static int write_control_reg(struct echoaudio *chip, u32 value, char force)
  64 {
  65         /* Handle the digital input auto-mute */
  66         if (chip->digital_in_automute)
  67                 value |= GML_DIGITAL_IN_AUTO_MUTE;
  68         else
  69                 value &= ~GML_DIGITAL_IN_AUTO_MUTE;
  70
  71         DE_ACT(("write_control_reg: 0x%x\n", value));
  72
  73         /* Write the control register */
  74         value = cpu_to_le32(value);
  75         if (value != chip->comm_page->control_register || force) {
  76                 if (wait_handshake(chip))
  77                         return -EIO;
  78                 chip->comm_page->control_register = value;
  79                 clear_handshake(chip);
  80                 return send_vector(chip, DSP_VC_WRITE_CONTROL_REG);
  81         }
  82         return 0;
  83 }
  84
  85
  86
  87 /* Gina24, Layla24, and Mona support digital input auto-mute.  If the digital
  88 input auto-mute is enabled, the DSP will only enable the digital inputs if
  89 the card is syncing to a valid clock on the ADAT or S/PDIF inputs.
  90 If the auto-mute is disabled, the digital inputs are enabled regardless of
  91 what the input clock is set or what is connected. */
  92 static int set_input_auto_mute(struct echoaudio *chip, int automute)
  93 {
  94         DE_ACT(("set_input_auto_mute %d\n", automute));
  95
  96         chip->digital_in_automute = automute;
  97
  98         /* Re-set the input clock to the current value - indirectly causes
  99         the auto-mute flag to be sent to the DSP */
 100         return set_input_clock(chip, chip->input_clock);
 101 }
 102
 103
 104
 105 /* S/PDIF coax / S/PDIF optical / ADAT - switch */
 106 static int set_digital_mode(struct echoaudio *chip, u8 mode)
 107 {
 108         u8 previous_mode;
 109         int err, i, o;
 110
 111         if (chip->bad_board)
 112                 return -EIO;
 113
 114         /* All audio channels must be closed before changing the digital mode */
 115         if (snd_BUG_ON(chip->pipe_alloc_mask))
 116                 return -EAGAIN;
 117
 118         if (snd_BUG_ON(!(chip->digital_modes & (1 << mode))))
 119                 return -EINVAL;
 120
 121         previous_mode = chip->digital_mode;
 122         err = dsp_set_digital_mode(chip, mode);
 123
 124         /* If we successfully changed the digital mode from or to ADAT,
 125            then make sure all output, input and monitor levels are
 126            updated by the DSP comm object. */
 127         if (err >= 0 && previous_mode != mode &&
 128             (previous_mode == DIGITAL_MODE_ADAT || mode == DIGITAL_MODE_ADAT)) {
 129                 spin_lock_irq(&chip->lock);
 130                 for (o = 0; o < num_busses_out(chip); o++)
 131                         for (i = 0; i < num_busses_in(chip); i++)
 132                                 set_monitor_gain(chip, o, i,
 133                                                  chip->monitor_gain[o][i]);
 134
 135 #ifdef ECHOCARD_HAS_INPUT_GAIN
 136                 for (i = 0; i < num_busses_in(chip); i++)
 137                         set_input_gain(chip, i, chip->input_gain[i]);
 138                 update_input_line_level(chip);
 139 #endif
 140
 141                 for (o = 0; o < num_busses_out(chip); o++)
 142                         set_output_gain(chip, o, chip->output_gain[o]);
 143                 update_output_line_level(chip);
 144                 spin_unlock_irq(&chip->lock);
 145         }
 146
 147         return err;
 148 }
 149
 150
 151
 152 /* Set the S/PDIF output format */
 153 static int set_professional_spdif(struct echoaudio *chip, char prof)
 154 {
 155         u32 control_reg;
 156         int err;
 157
 158         /* Clear the current S/PDIF flags */
 159         control_reg = le32_to_cpu(chip->comm_page->control_register);
 160         control_reg &= GML_SPDIF_FORMAT_CLEAR_MASK;
 161
 162         /* Set the new S/PDIF flags depending on the mode */
 163         control_reg |= GML_SPDIF_TWO_CHANNEL | GML_SPDIF_24_BIT |
 164                 GML_SPDIF_COPY_PERMIT;
 165         if (prof) {
 166                 /* Professional mode */
 167                 control_reg |= GML_SPDIF_PRO_MODE;
 168
 169                 switch (chip->sample_rate) {
 170                 case 32000:
 171                         control_reg |= GML_SPDIF_SAMPLE_RATE0 |
 172                                 GML_SPDIF_SAMPLE_RATE1;
 173                         break;
 174                 case 44100:
 175                         control_reg |= GML_SPDIF_SAMPLE_RATE0;
 176                         break;
 177                 case 48000:
 178                         control_reg |= GML_SPDIF_SAMPLE_RATE1;
 179                         break;
 180                 }
 181         } else {
 182                 /* Consumer mode */
 183                 switch (chip->sample_rate) {
 184                 case 32000:
 185                         control_reg |= GML_SPDIF_SAMPLE_RATE0 |
 186                                 GML_SPDIF_SAMPLE_RATE1;
 187                         break;
 188                 case 48000:
 189                         control_reg |= GML_SPDIF_SAMPLE_RATE1;
 190                         break;
 191                 }
 192         }
 193
 194         if ((err = write_control_reg(chip, control_reg, FALSE)))
 195                 return err;
 196         chip->professional_spdif = prof;
 197         DE_ACT(("set_professional_spdif to %s\n",
 198                 prof ? "Professional" : "Consumer"));
 199         return 0;
 200 }