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Linux/sound/pci/echoaudio/indigo_dsp.c

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  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         if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO))
 42                 return -ENODEV;
 43 
 44         err = init_dsp_comm_page(chip);
 45         if (err) {
 46                 dev_err(chip->card->dev,
 47                         "init_hw - could not initialize DSP comm page\n");
 48                 return err;
 49         }
 50 
 51         chip->device_id = device_id;
 52         chip->subdevice_id = subdevice_id;
 53         chip->bad_board = true;
 54         chip->dsp_code_to_load = FW_INDIGO_DSP;
 55         /* Since this card has no ASIC, mark it as loaded so everything
 56            works OK */
 57         chip->asic_loaded = true;
 58         chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
 59 
 60         err = load_firmware(chip);
 61         if (err < 0)
 62                 return err;
 63         chip->bad_board = false;
 64 
 65         return err;
 66 }
 67 
 68 
 69 
 70 static int set_mixer_defaults(struct echoaudio *chip)
 71 {
 72         return init_line_levels(chip);
 73 }
 74 
 75 
 76 
 77 static u32 detect_input_clocks(const struct echoaudio *chip)
 78 {
 79         return ECHO_CLOCK_BIT_INTERNAL;
 80 }
 81 
 82 
 83 
 84 /* The Indigo has no ASIC. Just do nothing */
 85 static int load_asic(struct echoaudio *chip)
 86 {
 87         return 0;
 88 }
 89 
 90 
 91 
 92 static int set_sample_rate(struct echoaudio *chip, u32 rate)
 93 {
 94         u32 control_reg;
 95 
 96         switch (rate) {
 97         case 96000:
 98                 control_reg = MIA_96000;
 99                 break;
100         case 88200:
101                 control_reg = MIA_88200;
102                 break;
103         case 48000:
104                 control_reg = MIA_48000;
105                 break;
106         case 44100:
107                 control_reg = MIA_44100;
108                 break;
109         case 32000:
110                 control_reg = MIA_32000;
111                 break;
112         default:
113                 dev_err(chip->card->dev,
114                         "set_sample_rate: %d invalid!\n", rate);
115                 return -EINVAL;
116         }
117 
118         /* Set the control register if it has changed */
119         if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
120                 if (wait_handshake(chip))
121                         return -EIO;
122 
123                 chip->comm_page->sample_rate = cpu_to_le32(rate);       /* ignored by the DSP */
124                 chip->comm_page->control_register = cpu_to_le32(control_reg);
125                 chip->sample_rate = rate;
126 
127                 clear_handshake(chip);
128                 return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
129         }
130         return 0;
131 }
132 
133 
134 
135 /* This function routes the sound from a virtual channel to a real output */
136 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
137                            int gain)
138 {
139         int index;
140 
141         if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
142                        output >= num_busses_out(chip)))
143                 return -EINVAL;
144 
145         if (wait_handshake(chip))
146                 return -EIO;
147 
148         chip->vmixer_gain[output][pipe] = gain;
149         index = output * num_pipes_out(chip) + pipe;
150         chip->comm_page->vmixer[index] = gain;
151 
152         dev_dbg(chip->card->dev,
153                 "set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
154         return 0;
155 }
156 
157 
158 
159 /* Tell the DSP to read and update virtual mixer levels in comm page. */
160 static int update_vmixer_level(struct echoaudio *chip)
161 {
162         if (wait_handshake(chip))
163                 return -EIO;
164         clear_handshake(chip);
165         return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
166 }
167 
168 

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