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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 /* These functions are common for Gina24, Layla24 and Mona cards */
33 
34 
35 /* ASIC status check - some cards have one or two ASICs that need to be
36 loaded.  Once that load is complete, this function is called to see if
37 the load was successful.
38 If this load fails, it does not necessarily mean that the hardware is
39 defective - the external box may be disconnected or turned off. */
check_asic_status(struct echoaudio * chip)40 static int check_asic_status(struct echoaudio *chip)
41 {
42 	u32 asic_status;
43 
44 	send_vector(chip, DSP_VC_TEST_ASIC);
45 
46 	/* The DSP will return a value to indicate whether or not the
47 	   ASIC is currently loaded */
48 	if (read_dsp(chip, &asic_status) < 0) {
49 		DE_INIT(("check_asic_status: failed on read_dsp\n"));
50 		chip->asic_loaded = FALSE;
51 		return -EIO;
52 	}
53 
54 	chip->asic_loaded = (asic_status == ASIC_ALREADY_LOADED);
55 	return chip->asic_loaded ? 0 : -EIO;
56 }
57 
58 
59 
60 /* Most configuration of Gina24, Layla24, or Mona is accomplished by writing
61 the control register.  write_control_reg sends the new control register
62 value to the DSP. */
write_control_reg(struct echoaudio * chip,u32 value,char force)63 static int write_control_reg(struct echoaudio *chip, u32 value, char force)
64 {
65 	/* Handle the digital input auto-mute */
66 	if (chip->digital_in_automute)
67 		value |= GML_DIGITAL_IN_AUTO_MUTE;
68 	else
69 		value &= ~GML_DIGITAL_IN_AUTO_MUTE;
70 
71 	DE_ACT(("write_control_reg: 0x%x\n", value));
72 
73 	/* Write the control register */
74 	value = cpu_to_le32(value);
75 	if (value != chip->comm_page->control_register || force) {
76 		if (wait_handshake(chip))
77 			return -EIO;
78 		chip->comm_page->control_register = value;
79 		clear_handshake(chip);
80 		return send_vector(chip, DSP_VC_WRITE_CONTROL_REG);
81 	}
82 	return 0;
83 }
84 
85 
86 
87 /* Gina24, Layla24, and Mona support digital input auto-mute.  If the digital
88 input auto-mute is enabled, the DSP will only enable the digital inputs if
89 the card is syncing to a valid clock on the ADAT or S/PDIF inputs.
90 If the auto-mute is disabled, the digital inputs are enabled regardless of
91 what the input clock is set or what is connected. */
set_input_auto_mute(struct echoaudio * chip,int automute)92 static int set_input_auto_mute(struct echoaudio *chip, int automute)
93 {
94 	DE_ACT(("set_input_auto_mute %d\n", automute));
95 
96 	chip->digital_in_automute = automute;
97 
98 	/* Re-set the input clock to the current value - indirectly causes
99 	the auto-mute flag to be sent to the DSP */
100 	return set_input_clock(chip, chip->input_clock);
101 }
102 
103 
104 
105 /* S/PDIF coax / S/PDIF optical / ADAT - switch */
set_digital_mode(struct echoaudio * chip,u8 mode)106 static int set_digital_mode(struct echoaudio *chip, u8 mode)
107 {
108 	u8 previous_mode;
109 	int err, i, o;
110 
111 	if (chip->bad_board)
112 		return -EIO;
113 
114 	/* All audio channels must be closed before changing the digital mode */
115 	if (snd_BUG_ON(chip->pipe_alloc_mask))
116 		return -EAGAIN;
117 
118 	if (snd_BUG_ON(!(chip->digital_modes & (1 << mode))))
119 		return -EINVAL;
120 
121 	previous_mode = chip->digital_mode;
122 	err = dsp_set_digital_mode(chip, mode);
123 
124 	/* If we successfully changed the digital mode from or to ADAT,
125 	   then make sure all output, input and monitor levels are
126 	   updated by the DSP comm object. */
127 	if (err >= 0 && previous_mode != mode &&
128 	    (previous_mode == DIGITAL_MODE_ADAT || mode == DIGITAL_MODE_ADAT)) {
129 		spin_lock_irq(&chip->lock);
130 		for (o = 0; o < num_busses_out(chip); o++)
131 			for (i = 0; i < num_busses_in(chip); i++)
132 				set_monitor_gain(chip, o, i,
133 						 chip->monitor_gain[o][i]);
134 
135 #ifdef ECHOCARD_HAS_INPUT_GAIN
136 		for (i = 0; i < num_busses_in(chip); i++)
137 			set_input_gain(chip, i, chip->input_gain[i]);
138 		update_input_line_level(chip);
139 #endif
140 
141 		for (o = 0; o < num_busses_out(chip); o++)
142 			set_output_gain(chip, o, chip->output_gain[o]);
143 		update_output_line_level(chip);
144 		spin_unlock_irq(&chip->lock);
145 	}
146 
147 	return err;
148 }
149 
150 
151 
152 /* Set the S/PDIF output format */
set_professional_spdif(struct echoaudio * chip,char prof)153 static int set_professional_spdif(struct echoaudio *chip, char prof)
154 {
155 	u32 control_reg;
156 	int err;
157 
158 	/* Clear the current S/PDIF flags */
159 	control_reg = le32_to_cpu(chip->comm_page->control_register);
160 	control_reg &= GML_SPDIF_FORMAT_CLEAR_MASK;
161 
162 	/* Set the new S/PDIF flags depending on the mode */
163 	control_reg |= GML_SPDIF_TWO_CHANNEL | GML_SPDIF_24_BIT |
164 		GML_SPDIF_COPY_PERMIT;
165 	if (prof) {
166 		/* Professional mode */
167 		control_reg |= GML_SPDIF_PRO_MODE;
168 
169 		switch (chip->sample_rate) {
170 		case 32000:
171 			control_reg |= GML_SPDIF_SAMPLE_RATE0 |
172 				GML_SPDIF_SAMPLE_RATE1;
173 			break;
174 		case 44100:
175 			control_reg |= GML_SPDIF_SAMPLE_RATE0;
176 			break;
177 		case 48000:
178 			control_reg |= GML_SPDIF_SAMPLE_RATE1;
179 			break;
180 		}
181 	} else {
182 		/* Consumer mode */
183 		switch (chip->sample_rate) {
184 		case 32000:
185 			control_reg |= GML_SPDIF_SAMPLE_RATE0 |
186 				GML_SPDIF_SAMPLE_RATE1;
187 			break;
188 		case 48000:
189 			control_reg |= GML_SPDIF_SAMPLE_RATE1;
190 			break;
191 		}
192 	}
193 
194 	if ((err = write_control_reg(chip, control_reg, FALSE)))
195 		return err;
196 	chip->professional_spdif = prof;
197 	DE_ACT(("set_professional_spdif to %s\n",
198 		prof ? "Professional" : "Consumer"));
199 	return 0;
200 }
201