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 	DE_INIT(("init_hw() - Darla20\n"));
37 	if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA20))
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;
48 	chip->dsp_code_to_load = FW_DARLA20_DSP;
49 	chip->spdif_status = GD_SPDIF_STATUS_UNDEF;
50 	chip->clock_state = GD_CLOCK_UNDEF;
51 	/* Since this card has no ASIC, mark it as loaded so everything
52 	   works OK */
53 	chip->asic_loaded = TRUE;
54 	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
55 
56 	if ((err = load_firmware(chip)) < 0)
57 		return err;
58 	chip->bad_board = FALSE;
59 
60 	DE_INIT(("init_hw done\n"));
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 /* The Darla20 has no external clock sources */
74 static u32 detect_input_clocks(const struct echoaudio *chip)
75 {
76 	return ECHO_CLOCK_BIT_INTERNAL;
77 }
78 
79 
80 
81 /* The Darla20 has no ASIC. Just do nothing */
82 static int load_asic(struct echoaudio *chip)
83 {
84 	return 0;
85 }
86 
87 
88 
89 static int set_sample_rate(struct echoaudio *chip, u32 rate)
90 {
91 	u8 clock_state, spdif_status;
92 
93 	if (wait_handshake(chip))
94 		return -EIO;
95 
96 	switch (rate) {
97 	case 44100:
98 		clock_state = GD_CLOCK_44;
99 		spdif_status = GD_SPDIF_STATUS_44;
100 		break;
101 	case 48000:
102 		clock_state = GD_CLOCK_48;
103 		spdif_status = GD_SPDIF_STATUS_48;
104 		break;
105 	default:
106 		clock_state = GD_CLOCK_NOCHANGE;
107 		spdif_status = GD_SPDIF_STATUS_NOCHANGE;
108 		break;
109 	}
110 
111 	if (chip->clock_state == clock_state)
112 		clock_state = GD_CLOCK_NOCHANGE;
113 	if (spdif_status == chip->spdif_status)
114 		spdif_status = GD_SPDIF_STATUS_NOCHANGE;
115 
116 	chip->comm_page->sample_rate = cpu_to_le32(rate);
117 	chip->comm_page->gd_clock_state = clock_state;
118 	chip->comm_page->gd_spdif_status = spdif_status;
119 	chip->comm_page->gd_resampler_state = 3;	/* magic number - should always be 3 */
120 
121 	/* Save the new audio state if it changed */
122 	if (clock_state != GD_CLOCK_NOCHANGE)
123 		chip->clock_state = clock_state;
124 	if (spdif_status != GD_SPDIF_STATUS_NOCHANGE)
125 		chip->spdif_status = spdif_status;
126 	chip->sample_rate = rate;
127 
128 	clear_handshake(chip);
129 	return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
130 }
131