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() - 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;
48 	chip->dsp_code_to_load = FW_DARLA24_DSP;
49 	/* Since this card has no ASIC, mark it as loaded so everything
50 	   works OK */
51 	chip->asic_loaded = TRUE;
52 	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
53 		ECHO_CLOCK_BIT_ESYNC;
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 
163