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 	if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO_IO))
42 		return -ENODEV;
43 
44 	if ((err = init_dsp_comm_page(chip))) {
45 		dev_err(chip->card->dev,
46 			"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 	return err;
64 }
65 
66 
67 
68 static int set_mixer_defaults(struct echoaudio *chip)
69 {
70 	return init_line_levels(chip);
71 }
72 
73 
74 
75 static u32 detect_input_clocks(const struct echoaudio *chip)
76 {
77 	return ECHO_CLOCK_BIT_INTERNAL;
78 }
79 
80 
81 
82 /* The IndigoIO 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 	if (wait_handshake(chip))
93 		return -EIO;
94 
95 	chip->sample_rate = rate;
96 	chip->comm_page->sample_rate = cpu_to_le32(rate);
97 	clear_handshake(chip);
98 	return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
99 }
100 
101 
102 
103 /* This function routes the sound from a virtual channel to a real output */
104 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
105 			   int gain)
106 {
107 	int index;
108 
109 	if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
110 		       output >= num_busses_out(chip)))
111 		return -EINVAL;
112 
113 	if (wait_handshake(chip))
114 		return -EIO;
115 
116 	chip->vmixer_gain[output][pipe] = gain;
117 	index = output * num_pipes_out(chip) + pipe;
118 	chip->comm_page->vmixer[index] = gain;
119 
120 	dev_dbg(chip->card->dev,
121 		"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