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) != DARLA24))
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_DARLA24_DSP;
50 /* Since this card has no ASIC, mark it as loaded so everything
51 works OK */
52 chip->asic_loaded = true;
53 chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
54 ECHO_CLOCK_BIT_ESYNC;
55
56 err = load_firmware(chip);
57 if (err < 0)
58 return err;
59 chip->bad_board = false;
60
61 return err;
62 }
63
64
65
66 static int set_mixer_defaults(struct echoaudio *chip)
67 {
68 return init_line_levels(chip);
69 }
70
71
72
73 static u32 detect_input_clocks(const struct echoaudio *chip)
74 {
75 u32 clocks_from_dsp, clock_bits;
76
77 /* Map the DSP clock detect bits to the generic driver clock
78 detect bits */
79 clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
80
81 clock_bits = ECHO_CLOCK_BIT_INTERNAL;
82
83 if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_ESYNC)
84 clock_bits |= ECHO_CLOCK_BIT_ESYNC;
85
86 return clock_bits;
87 }
88
89
90
91 /* The Darla24 has no ASIC. Just do nothing */
92 static int load_asic(struct echoaudio *chip)
93 {
94 return 0;
95 }
96
97
98
99 static int set_sample_rate(struct echoaudio *chip, u32 rate)
100 {
101 u8 clock;
102
103 switch (rate) {
104 case 96000:
105 clock = GD24_96000;
106 break;
107 case 88200:
108 clock = GD24_88200;
109 break;
110 case 48000:
111 clock = GD24_48000;
112 break;
113 case 44100:
114 clock = GD24_44100;
115 break;
116 case 32000:
117 clock = GD24_32000;
118 break;
119 case 22050:
120 clock = GD24_22050;
121 break;
122 case 16000:
123 clock = GD24_16000;
124 break;
125 case 11025:
126 clock = GD24_11025;
127 break;
128 case 8000:
129 clock = GD24_8000;
130 break;
131 default:
132 dev_err(chip->card->dev,
133 "set_sample_rate: Error, invalid sample rate %d\n",
134 rate);
135 return -EINVAL;
136 }
137
138 if (wait_handshake(chip))
139 return -EIO;
140
141 dev_dbg(chip->card->dev,
142 "set_sample_rate: %d clock %d\n", rate, clock);
143 chip->sample_rate = rate;
144
145 /* Override the sample rate if this card is set to Echo sync. */
146 if (chip->input_clock == ECHO_CLOCK_ESYNC)
147 clock = GD24_EXT_SYNC;
148
149 chip->comm_page->sample_rate = cpu_to_le32(rate); /* ignored by the DSP ? */
150 chip->comm_page->gd_clock_state = clock;
151 clear_handshake(chip);
152 return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
153 }
154
155
156
157 static int set_input_clock(struct echoaudio *chip, u16 clock)
158 {
159 if (snd_BUG_ON(clock != ECHO_CLOCK_INTERNAL &&
160 clock != ECHO_CLOCK_ESYNC))
161 return -EINVAL;
162 chip->input_clock = clock;
163 return set_sample_rate(chip, chip->sample_rate);
164 }
165
166
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