root/sound/pci/echoaudio/mia_dsp.c

DEFINITIONS

1. init_hw
2. set_mixer_defaults
3. detect_input_clocks
4. load_asic
5. set_sample_rate
6. set_input_clock
7. set_vmixer_gain
8. update_vmixer_level
9. update_flags
10. set_professional_spdif

   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_input_clock(struct echoaudio *chip, u16 clock);
  33 static int set_professional_spdif(struct echoaudio *chip, char prof);
  34 static int update_flags(struct echoaudio *chip);
  35 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
  36                            int gain);
  37 static int update_vmixer_level(struct echoaudio *chip);
  38 
  39 
  40 static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
  41 {
  42         int err;
  43 
  44         if (snd_BUG_ON((subdevice_id & 0xfff0) != MIA))
  45                 return -ENODEV;
  46 
  47         if ((err = init_dsp_comm_page(chip))) {
  48                 dev_err(chip->card->dev,
  49                         "init_hw - could not initialize DSP comm page\n");
  50                 return err;
  51         }
  52 
  53         chip->device_id = device_id;
  54         chip->subdevice_id = subdevice_id;
  55         chip->bad_board = true;
  56         chip->dsp_code_to_load = FW_MIA_DSP;
  57         /* Since this card has no ASIC, mark it as loaded so everything
  58            works OK */
  59         chip->asic_loaded = true;
  60         if ((subdevice_id & 0x0000f) == MIA_MIDI_REV)
  61                 chip->has_midi = true;
  62         chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
  63                 ECHO_CLOCK_BIT_SPDIF;
  64 
  65         if ((err = load_firmware(chip)) < 0)
  66                 return err;
  67         chip->bad_board = false;
  68 
  69         return err;
  70 }
  71 
  72 
  73 
  74 static int set_mixer_defaults(struct echoaudio *chip)
  75 {
  76         return init_line_levels(chip);
  77 }
  78 
  79 
  80 
  81 static u32 detect_input_clocks(const struct echoaudio *chip)
  82 {
  83         u32 clocks_from_dsp, clock_bits;
  84 
  85         /* Map the DSP clock detect bits to the generic driver clock
  86            detect bits */
  87         clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
  88 
  89         clock_bits = ECHO_CLOCK_BIT_INTERNAL;
  90 
  91         if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_SPDIF)
  92                 clock_bits |= ECHO_CLOCK_BIT_SPDIF;
  93 
  94         return clock_bits;
  95 }
  96 
  97 
  98 
  99 /* The Mia has no ASIC. Just do nothing */
 100 static int load_asic(struct echoaudio *chip)
 101 {
 102         return 0;
 103 }
 104 
 105 
 106 
 107 static int set_sample_rate(struct echoaudio *chip, u32 rate)
 108 {
 109         u32 control_reg;
 110 
 111         switch (rate) {
 112         case 96000:
 113                 control_reg = MIA_96000;
 114                 break;
 115         case 88200:
 116                 control_reg = MIA_88200;
 117                 break;
 118         case 48000:
 119                 control_reg = MIA_48000;
 120                 break;
 121         case 44100:
 122                 control_reg = MIA_44100;
 123                 break;
 124         case 32000:
 125                 control_reg = MIA_32000;
 126                 break;
 127         default:
 128                 dev_err(chip->card->dev,
 129                         "set_sample_rate: %d invalid!\n", rate);
 130                 return -EINVAL;
 131         }
 132 
 133         /* Override the clock setting if this Mia is set to S/PDIF clock */
 134         if (chip->input_clock == ECHO_CLOCK_SPDIF)
 135                 control_reg |= MIA_SPDIF;
 136 
 137         /* Set the control register if it has changed */
 138         if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
 139                 if (wait_handshake(chip))
 140                         return -EIO;
 141 
 142                 chip->comm_page->sample_rate = cpu_to_le32(rate);       /* ignored by the DSP */
 143                 chip->comm_page->control_register = cpu_to_le32(control_reg);
 144                 chip->sample_rate = rate;
 145 
 146                 clear_handshake(chip);
 147                 return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
 148         }
 149         return 0;
 150 }
 151 
 152 
 153 
 154 static int set_input_clock(struct echoaudio *chip, u16 clock)
 155 {
 156         dev_dbg(chip->card->dev, "set_input_clock(%d)\n", clock);
 157         if (snd_BUG_ON(clock != ECHO_CLOCK_INTERNAL &&
 158                        clock != ECHO_CLOCK_SPDIF))
 159                 return -EINVAL;
 160 
 161         chip->input_clock = clock;
 162         return set_sample_rate(chip, chip->sample_rate);
 163 }
 164 
 165 
 166 
 167 /* This function routes the sound from a virtual channel to a real output */
 168 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
 169                            int gain)
 170 {
 171         int index;
 172 
 173         if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
 174                        output >= num_busses_out(chip)))
 175                 return -EINVAL;
 176 
 177         if (wait_handshake(chip))
 178                 return -EIO;
 179 
 180         chip->vmixer_gain[output][pipe] = gain;
 181         index = output * num_pipes_out(chip) + pipe;
 182         chip->comm_page->vmixer[index] = gain;
 183 
 184         dev_dbg(chip->card->dev,
 185                 "set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
 186         return 0;
 187 }
 188 
 189 
 190 
 191 /* Tell the DSP to read and update virtual mixer levels in comm page. */
 192 static int update_vmixer_level(struct echoaudio *chip)
 193 {
 194         if (wait_handshake(chip))
 195                 return -EIO;
 196         clear_handshake(chip);
 197         return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
 198 }
 199 
 200 
 201 
 202 /* Tell the DSP to reread the flags from the comm page */
 203 static int update_flags(struct echoaudio *chip)
 204 {
 205         if (wait_handshake(chip))
 206                 return -EIO;
 207         clear_handshake(chip);
 208         return send_vector(chip, DSP_VC_UPDATE_FLAGS);
 209 }
 210 
 211 
 212 
 213 static int set_professional_spdif(struct echoaudio *chip, char prof)
 214 {
 215         dev_dbg(chip->card->dev, "set_professional_spdif %d\n", prof);
 216         if (prof)
 217                 chip->comm_page->flags |=
 218                         cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
 219         else
 220                 chip->comm_page->flags &=
 221                         ~cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
 222         chip->professional_spdif = prof;
 223         return update_flags(chip);
 224 }
 225