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