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darla24_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 init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
33 {
34  int err;
35 
36  DE_INIT(("init_hw() - Darla24\n"));
37  if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA24))
38  return -ENODEV;
39 
40  if ((err = init_dsp_comm_page(chip))) {
41  DE_INIT(("init_hw - could not initialize DSP comm page\n"));
42  return err;
43  }
44 
45  chip->device_id = device_id;
46  chip->subdevice_id = subdevice_id;
47  chip->bad_board = TRUE;
49  /* Since this card has no ASIC, mark it as loaded so everything
50  works OK */
51  chip->asic_loaded = TRUE;
54 
55  if ((err = load_firmware(chip)) < 0)
56  return err;
57  chip->bad_board = FALSE;
58 
59  DE_INIT(("init_hw done\n"));
60  return err;
61 }
62 
63 
64 
65 static int set_mixer_defaults(struct echoaudio *chip)
66 {
67  return init_line_levels(chip);
68 }
69 
70 
71 
72 static u32 detect_input_clocks(const struct echoaudio *chip)
73 {
74  u32 clocks_from_dsp, clock_bits;
75 
76  /* Map the DSP clock detect bits to the generic driver clock
77  detect bits */
78  clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
79 
80  clock_bits = ECHO_CLOCK_BIT_INTERNAL;
81 
82  if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_ESYNC)
83  clock_bits |= ECHO_CLOCK_BIT_ESYNC;
84 
85  return clock_bits;
86 }
87 
88 
89 
90 /* The Darla24 has no ASIC. Just do nothing */
91 static int load_asic(struct echoaudio *chip)
92 {
93  return 0;
94 }
95 
96 
97 
98 static int set_sample_rate(struct echoaudio *chip, u32 rate)
99 {
100  u8 clock;
101 
102  switch (rate) {
103  case 96000:
104  clock = GD24_96000;
105  break;
106  case 88200:
107  clock = GD24_88200;
108  break;
109  case 48000:
110  clock = GD24_48000;
111  break;
112  case 44100:
113  clock = GD24_44100;
114  break;
115  case 32000:
116  clock = GD24_32000;
117  break;
118  case 22050:
119  clock = GD24_22050;
120  break;
121  case 16000:
122  clock = GD24_16000;
123  break;
124  case 11025:
125  clock = GD24_11025;
126  break;
127  case 8000:
128  clock = GD24_8000;
129  break;
130  default:
131  DE_ACT(("set_sample_rate: Error, invalid sample rate %d\n",
132  rate));
133  return -EINVAL;
134  }
135 
136  if (wait_handshake(chip))
137  return -EIO;
138 
139  DE_ACT(("set_sample_rate: %d clock %d\n", rate, clock));
140  chip->sample_rate = rate;
141 
142  /* Override the sample rate if this card is set to Echo sync. */
143  if (chip->input_clock == ECHO_CLOCK_ESYNC)
144  clock = GD24_EXT_SYNC;
145 
146  chip->comm_page->sample_rate = cpu_to_le32(rate); /* ignored by the DSP ? */
147  chip->comm_page->gd_clock_state = clock;
148  clear_handshake(chip);
149  return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
150 }
151 
152 
153 
154 static int set_input_clock(struct echoaudio *chip, u16 clock)
155 {
156  if (snd_BUG_ON(clock != ECHO_CLOCK_INTERNAL &&
157  clock != ECHO_CLOCK_ESYNC))
158  return -EINVAL;
159  chip->input_clock = clock;
160  return set_sample_rate(chip, chip->sample_rate);
161 }
162