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TOMOYO Linux Cross Reference
Linux/sound/pci/echoaudio/darla24_dsp.c

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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 static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
 33 {
 34         int err;
 35 
 36         if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA24))
 37                 return -ENODEV;
 38 
 39         if ((err = init_dsp_comm_page(chip))) {
 40                 dev_err(chip->card->dev,
 41                         "init_hw: could not initialize DSP comm page\n");
 42                 return err;
 43         }
 44 
 45         chip->device_id = device_id;
 46         chip->subdevice_id = subdevice_id;
 47         chip->bad_board = true;
 48         chip->dsp_code_to_load = FW_DARLA24_DSP;
 49         /* Since this card has no ASIC, mark it as loaded so everything
 50            works OK */
 51         chip->asic_loaded = true;
 52         chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
 53                 ECHO_CLOCK_BIT_ESYNC;
 54 
 55         if ((err = load_firmware(chip)) < 0)
 56                 return err;
 57         chip->bad_board = false;
 58 
 59         return err;
 60 }
 61 
 62 
 63 
 64 static int set_mixer_defaults(struct echoaudio *chip)
 65 {
 66         return init_line_levels(chip);
 67 }
 68 
 69 
 70 
 71 static u32 detect_input_clocks(const struct echoaudio *chip)
 72 {
 73         u32 clocks_from_dsp, clock_bits;
 74 
 75         /* Map the DSP clock detect bits to the generic driver clock
 76            detect bits */
 77         clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
 78 
 79         clock_bits = ECHO_CLOCK_BIT_INTERNAL;
 80 
 81         if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_ESYNC)
 82                 clock_bits |= ECHO_CLOCK_BIT_ESYNC;
 83 
 84         return clock_bits;
 85 }
 86 
 87 
 88 
 89 /* The Darla24 has no ASIC. Just do nothing */
 90 static int load_asic(struct echoaudio *chip)
 91 {
 92         return 0;
 93 }
 94 
 95 
 96 
 97 static int set_sample_rate(struct echoaudio *chip, u32 rate)
 98 {
 99         u8 clock;
100 
101         switch (rate) {
102         case 96000:
103                 clock = GD24_96000;
104                 break;
105         case 88200:
106                 clock = GD24_88200;
107                 break;
108         case 48000:
109                 clock = GD24_48000;
110                 break;
111         case 44100:
112                 clock = GD24_44100;
113                 break;
114         case 32000:
115                 clock = GD24_32000;
116                 break;
117         case 22050:
118                 clock = GD24_22050;
119                 break;
120         case 16000:
121                 clock = GD24_16000;
122                 break;
123         case 11025:
124                 clock = GD24_11025;
125                 break;
126         case 8000:
127                 clock = GD24_8000;
128                 break;
129         default:
130                 dev_err(chip->card->dev,
131                         "set_sample_rate: Error, invalid sample rate %d\n",
132                         rate);
133                 return -EINVAL;
134         }
135 
136         if (wait_handshake(chip))
137                 return -EIO;
138 
139         dev_dbg(chip->card->dev,
140                 "set_sample_rate: %d clock %d\n", rate, clock);
141         chip->sample_rate = rate;
142 
143         /* Override the sample rate if this card is set to Echo sync. */
144         if (chip->input_clock == ECHO_CLOCK_ESYNC)
145                 clock = GD24_EXT_SYNC;
146 
147         chip->comm_page->sample_rate = cpu_to_le32(rate);       /* ignored by the DSP ? */
148         chip->comm_page->gd_clock_state = clock;
149         clear_handshake(chip);
150         return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
151 }
152 
153 
154 
155 static int set_input_clock(struct echoaudio *chip, u16 clock)
156 {
157         if (snd_BUG_ON(clock != ECHO_CLOCK_INTERNAL &&
158                        clock != ECHO_CLOCK_ESYNC))
159                 return -EINVAL;
160         chip->input_clock = clock;
161         return set_sample_rate(chip, chip->sample_rate);
162 }
163 
164 

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