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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 <[email protected]>
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;
54  /* Since this card has no ASIC, mark it as loaded so everything
55  works OK */
56  chip->asic_loaded = TRUE;
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 {
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 }
164