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_DJ))
42 		return -ENODEV;
43 
44 	err = init_dsp_comm_page(chip);
45 	if (err) {
46 		dev_err(chip->card->dev,
47 			"init_hw - could not initialize DSP comm page\n");
48 		return err;
49 	}
50 
51 	chip->device_id = device_id;
52 	chip->subdevice_id = subdevice_id;
53 	chip->bad_board = true;
54 	chip->dsp_code_to_load = FW_INDIGO_DJ_DSP;
55 	/* Since this card has no ASIC, mark it as loaded so everything
56 	   works OK */
57 	chip->asic_loaded = true;
58 	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
59 
60 	err = load_firmware(chip);
61 	if (err < 0)
62 		return err;
63 	chip->bad_board = false;
64 
65 	return err;
66 }
67 
68 
69 
70 static int set_mixer_defaults(struct echoaudio *chip)
71 {
72 	return init_line_levels(chip);
73 }
74 
75 
76 
77 static u32 detect_input_clocks(const struct echoaudio *chip)
78 {
79 	return ECHO_CLOCK_BIT_INTERNAL;
80 }
81 
82 
83 
84 /* The IndigoDJ has no ASIC. Just do nothing */
85 static int load_asic(struct echoaudio *chip)
86 {
87 	return 0;
88 }
89 
90 
91 
92 static int set_sample_rate(struct echoaudio *chip, u32 rate)
93 {
94 	u32 control_reg;
95 
96 	switch (rate) {
97 	case 96000:
98 		control_reg = MIA_96000;
99 		break;
100 	case 88200:
101 		control_reg = MIA_88200;
102 		break;
103 	case 48000:
104 		control_reg = MIA_48000;
105 		break;
106 	case 44100:
107 		control_reg = MIA_44100;
108 		break;
109 	case 32000:
110 		control_reg = MIA_32000;
111 		break;
112 	default:
113 		dev_err(chip->card->dev,
114 			"set_sample_rate: %d invalid!\n", rate);
115 		return -EINVAL;
116 	}
117 
118 	/* Set the control register if it has changed */
119 	if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
120 		if (wait_handshake(chip))
121 			return -EIO;
122 
123 		chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP */
124 		chip->comm_page->control_register = cpu_to_le32(control_reg);
125 		chip->sample_rate = rate;
126 
127 		clear_handshake(chip);
128 		return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
129 	}
130 	return 0;
131 }
132 
133 
134 
135 /* This function routes the sound from a virtual channel to a real output */
136 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
137 			   int gain)
138 {
139 	int index;
140 
141 	if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
142 		       output >= num_busses_out(chip)))
143 		return -EINVAL;
144 
145 	if (wait_handshake(chip))
146 		return -EIO;
147 
148 	chip->vmixer_gain[output][pipe] = gain;
149 	index = output * num_pipes_out(chip) + pipe;
150 	chip->comm_page->vmixer[index] = gain;
151 
152 	dev_dbg(chip->card->dev,
153 		"set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
154 	return 0;
155 }
156 
157 
158 
159 /* Tell the DSP to read and update virtual mixer levels in comm page. */
160 static int update_vmixer_level(struct echoaudio *chip)
161 {
162 	if (wait_handshake(chip))
163 		return -EIO;
164 	clear_handshake(chip);
165 	return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
166 }
167 
168