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 set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
33 			   int gain);
34 static int update_vmixer_level(struct echoaudio *chip);
35 
36 
37 static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
38 {
39 	int err;
40 
41 	DE_INIT(("init_hw() - Indigo IO\n"));
42 	if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO_IO))
43 		return -ENODEV;
44 
45 	if ((err = init_dsp_comm_page(chip))) {
46 		DE_INIT(("init_hw - could not initialize DSP comm page\n"));
47 		return err;
48 	}
49 
50 	chip->device_id = device_id;
51 	chip->subdevice_id = subdevice_id;
52 	chip->bad_board = TRUE;
53 	chip->dsp_code_to_load = FW_INDIGO_IO_DSP;
54 	/* Since this card has no ASIC, mark it as loaded so everything
55 	   works OK */
56 	chip->asic_loaded = TRUE;
57 	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
58 
59 	if ((err = load_firmware(chip)) < 0)
60 		return err;
61 	chip->bad_board = FALSE;
62 
63 	DE_INIT(("init_hw done\n"));
64 	return err;
65 }
66 
67 
68 
69 static int set_mixer_defaults(struct echoaudio *chip)
70 {
71 	return init_line_levels(chip);
72 }
73 
74 
75 
76 static u32 detect_input_clocks(const struct echoaudio *chip)
77 {
78 	return ECHO_CLOCK_BIT_INTERNAL;
79 }
80 
81 
82 
83 /* The IndigoIO has no ASIC. Just do nothing */
84 static int load_asic(struct echoaudio *chip)
85 {
86 	return 0;
87 }
88 
89 
90 
91 static int set_sample_rate(struct echoaudio *chip, u32 rate)
92 {
93 	if (wait_handshake(chip))
94 		return -EIO;
95 
96 	chip->sample_rate = rate;
97 	chip->comm_page->sample_rate = cpu_to_le32(rate);
98 	clear_handshake(chip);
99 	return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
100 }
101 
102 
103 
104 /* This function routes the sound from a virtual channel to a real output */
105 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
106 			   int gain)
107 {
108 	int index;
109 
110 	if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
111 		       output >= num_busses_out(chip)))
112 		return -EINVAL;
113 
114 	if (wait_handshake(chip))
115 		return -EIO;
116 
117 	chip->vmixer_gain[output][pipe] = gain;
118 	index = output * num_pipes_out(chip) + pipe;
119 	chip->comm_page->vmixer[index] = gain;
120 
121 	DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain));
122 	return 0;
123 }
124 
125 
126 
127 /* Tell the DSP to read and update virtual mixer levels in comm page. */
128 static int update_vmixer_level(struct echoaudio *chip)
129 {
130 	if (wait_handshake(chip))
131 		return -EIO;
132 	clear_handshake(chip);
133 	return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
134 }
135 
136