release/src-rt-6.x.4708/linux/linux-2.6.36/sound/pci/echoaudio/mia_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_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         DE_INIT(("init_hw() - Mia\n"));
  45         if (snd_BUG_ON((subdevice_id & 0xfff0) != MIA))
  46                 return -ENODEV;
  47
  48         if ((err = init_dsp_comm_page(chip))) {
  49                 DE_INIT(("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         DE_INIT(("init_hw done\n"));
  70         return err;
  71 }
  72
  73
  74
  75 static int set_mixer_defaults(struct echoaudio *chip)
  76 {
  77         return init_line_levels(chip);
  78 }
  79
  80
  81
  82 static u32 detect_input_clocks(const struct echoaudio *chip)
  83 {
  84         u32 clocks_from_dsp, clock_bits;
  85
  86         /* Map the DSP clock detect bits to the generic driver clock
  87            detect bits */
  88         clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
  89
  90         clock_bits = ECHO_CLOCK_BIT_INTERNAL;
  91
  92         if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_SPDIF)
  93                 clock_bits |= ECHO_CLOCK_BIT_SPDIF;
  94
  95         return clock_bits;
  96 }
  97
  98
  99
 100 /* The Mia has no ASIC. Just do nothing */
 101 static int load_asic(struct echoaudio *chip)
 102 {
 103         return 0;
 104 }
 105
 106
 107
 108 static int set_sample_rate(struct echoaudio *chip, u32 rate)
 109 {
 110         u32 control_reg;
 111
 112         switch (rate) {
 113         case 96000:
 114                 control_reg = MIA_96000;
 115                 break;
 116         case 88200:
 117                 control_reg = MIA_88200;
 118                 break;
 119         case 48000:
 120                 control_reg = MIA_48000;
 121                 break;
 122         case 44100:
 123                 control_reg = MIA_44100;
 124                 break;
 125         case 32000:
 126                 control_reg = MIA_32000;
 127                 break;
 128         default:
 129                 DE_ACT(("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         DE_ACT(("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         DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain));
 185         return 0;
 186 }
 187
 188
 189
 190 /* Tell the DSP to read and update virtual mixer levels in comm page. */
 191 static int update_vmixer_level(struct echoaudio *chip)
 192 {
 193         if (wait_handshake(chip))
 194                 return -EIO;
 195         clear_handshake(chip);
 196         return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
 197 }
 198
 199
 200
 201 /* Tell the DSP to reread the flags from the comm page */
 202 static int update_flags(struct echoaudio *chip)
 203 {
 204         if (wait_handshake(chip))
 205                 return -EIO;
 206         clear_handshake(chip);
 207         return send_vector(chip, DSP_VC_UPDATE_FLAGS);
 208 }
 209
 210
 211
 212 static int set_professional_spdif(struct echoaudio *chip, char prof)
 213 {
 214         DE_ACT(("set_professional_spdif %d\n", prof));
 215         if (prof)
 216                 chip->comm_page->flags |=
 217                         cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
 218         else
 219                 chip->comm_page->flags &=
 220                         ~cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
 221         chip->professional_spdif = prof;
 222         return update_flags(chip);
 223 }