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 init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
33 {
34 int err;
35
36 if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA20))
37 return -ENODEV;
38
39 err = init_dsp_comm_page(chip);
40 if (err) {
41 dev_err(chip->card->dev,
42 "init_hw: could not initialize DSP comm page\n");
43 return err;
44 }
45
46 chip->device_id = device_id;
47 chip->subdevice_id = subdevice_id;
48 chip->bad_board = true;
49 chip->dsp_code_to_load = FW_DARLA20_DSP;
50 chip->spdif_status = GD_SPDIF_STATUS_UNDEF;
51 chip->clock_state = GD_CLOCK_UNDEF;
52 /* Since this card has no ASIC, mark it as loaded so everything
53 works OK */
54 chip->asic_loaded = true;
55 chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
56
57 err = load_firmware(chip);
58 if (err < 0)
59 return err;
60 chip->bad_board = false;
61
62 return err;
63 }
64
65
66
67 static int set_mixer_defaults(struct echoaudio *chip)
68 {
69 return init_line_levels(chip);
70 }
71
72
73
74 /* The Darla20 has no external clock sources */
75 static u32 detect_input_clocks(const struct echoaudio *chip)
76 {
77 return ECHO_CLOCK_BIT_INTERNAL;
78 }
79
80
81
82 /* The Darla20 has no ASIC. Just do nothing */
83 static int load_asic(struct echoaudio *chip)
84 {
85 return 0;
86 }
87
88
89
90 static int set_sample_rate(struct echoaudio *chip, u32 rate)
91 {
92 u8 clock_state, spdif_status;
93
94 if (wait_handshake(chip))
95 return -EIO;
96
97 switch (rate) {
98 case 44100:
99 clock_state = GD_CLOCK_44;
100 spdif_status = GD_SPDIF_STATUS_44;
101 break;
102 case 48000:
103 clock_state = GD_CLOCK_48;
104 spdif_status = GD_SPDIF_STATUS_48;
105 break;
106 default:
107 clock_state = GD_CLOCK_NOCHANGE;
108 spdif_status = GD_SPDIF_STATUS_NOCHANGE;
109 break;
110 }
111
112 if (chip->clock_state == clock_state)
113 clock_state = GD_CLOCK_NOCHANGE;
114 if (spdif_status == chip->spdif_status)
115 spdif_status = GD_SPDIF_STATUS_NOCHANGE;
116
117 chip->comm_page->sample_rate = cpu_to_le32(rate);
118 chip->comm_page->gd_clock_state = clock_state;
119 chip->comm_page->gd_spdif_status = spdif_status;
120 chip->comm_page->gd_resampler_state = 3; /* magic number - should always be 3 */
121
122 /* Save the new audio state if it changed */
123 if (clock_state != GD_CLOCK_NOCHANGE)
124 chip->clock_state = clock_state;
125 if (spdif_status != GD_SPDIF_STATUS_NOCHANGE)
126 chip->spdif_status = spdif_status;
127 chip->sample_rate = rate;
128
129 clear_handshake(chip);
130 return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
131 }
132
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