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