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 	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_DJ_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 IndigoDJ 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 	u32 control_reg;
93 
94 	switch (rate) {
95 	case 96000:
96 		control_reg = MIA_96000;
97 		break;
98 	case 88200:
99 		control_reg = MIA_88200;
100 		break;
101 	case 48000:
102 		control_reg = MIA_48000;
103 		break;
104 	case 44100:
105 		control_reg = MIA_44100;
106 		break;
107 	case 32000:
108 		control_reg = MIA_32000;
109 		break;
110 	default:
111 		dev_err(chip->card->dev,
112 			"set_sample_rate: %d invalid!\n", rate);
113 		return -EINVAL;
114 	}
115 
116 	/* Set the control register if it has changed */
117 	if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
118 		if (wait_handshake(chip))
119 			return -EIO;
120 
121 		chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP */
122 		chip->comm_page->control_register = cpu_to_le32(control_reg);
123 		chip->sample_rate = rate;
124 
125 		clear_handshake(chip);
126 		return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
127 	}
128 	return 0;
129 }
130 
131 
132 
133 /* This function routes the sound from a virtual channel to a real output */
134 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
135 			   int gain)
136 {
137 	int index;
138 
139 	if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
140 		       output >= num_busses_out(chip)))
141 		return -EINVAL;
142 
143 	if (wait_handshake(chip))
144 		return -EIO;
145 
146 	chip->vmixer_gain[output][pipe] = gain;
147 	index = output * num_pipes_out(chip) + pipe;
148 	chip->comm_page->vmixer[index] = gain;
149 
150 	dev_dbg(chip->card->dev,
151 		"set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
152 	return 0;
153 }
154 
155 
156 
157 /* Tell the DSP to read and update virtual mixer levels in comm page. */
158 static int update_vmixer_level(struct echoaudio *chip)
159 {
160 	if (wait_handshake(chip))
161 		return -EIO;
162 	clear_handshake(chip);
163 	return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
164 }
165 
166