Linux Kernel  3.7.1
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xonar_hdmi.c
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1 /*
2  * helper functions for HDMI models (Xonar HDAV1.3/HDAV1.3 Slim)
3  *
4  * Copyright (c) Clemens Ladisch <[email protected]>
5  *
6  *
7  * This driver is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License, version 2.
9  *
10  * This driver is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this driver; if not, see <http://www.gnu.org/licenses/>.
17  */
18 
19 #include <linux/pci.h>
20 #include <linux/delay.h>
21 #include <sound/asoundef.h>
22 #include <sound/control.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/tlv.h>
27 #include "xonar.h"
28 
29 static void hdmi_write_command(struct oxygen *chip, u8 command,
30  unsigned int count, const u8 *params)
31 {
32  unsigned int i;
33  u8 checksum;
34 
35  oxygen_write_uart(chip, 0xfb);
36  oxygen_write_uart(chip, 0xef);
37  oxygen_write_uart(chip, command);
38  oxygen_write_uart(chip, count);
39  for (i = 0; i < count; ++i)
40  oxygen_write_uart(chip, params[i]);
41  checksum = 0xfb + 0xef + command + count;
42  for (i = 0; i < count; ++i)
43  checksum += params[i];
44  oxygen_write_uart(chip, checksum);
45 }
46 
47 static void xonar_hdmi_init_commands(struct oxygen *chip,
48  struct xonar_hdmi *hdmi)
49 {
50  u8 param;
51 
52  oxygen_reset_uart(chip);
53  param = 0;
54  hdmi_write_command(chip, 0x61, 1, &param);
55  param = 1;
56  hdmi_write_command(chip, 0x74, 1, &param);
57  hdmi_write_command(chip, 0x54, 5, hdmi->params);
58 }
59 
60 void xonar_hdmi_init(struct oxygen *chip, struct xonar_hdmi *hdmi)
61 {
63  hdmi->params[4] = 1;
64  xonar_hdmi_init_commands(chip, hdmi);
65 }
66 
67 void xonar_hdmi_cleanup(struct oxygen *chip)
68 {
69  u8 param = 0;
70 
71  hdmi_write_command(chip, 0x74, 1, &param);
72 }
73 
74 void xonar_hdmi_resume(struct oxygen *chip, struct xonar_hdmi *hdmi)
75 {
76  xonar_hdmi_init_commands(chip, hdmi);
77 }
78 
80  struct snd_pcm_hardware *hardware)
81 {
82  if (channel == PCM_MULTICH) {
83  hardware->rates = SNDRV_PCM_RATE_44100 |
87  hardware->rate_min = 44100;
88  }
89 }
90 
91 void xonar_set_hdmi_params(struct oxygen *chip, struct xonar_hdmi *hdmi,
92  struct snd_pcm_hw_params *params)
93 {
94  hdmi->params[0] = 0; /* 1 = non-audio */
95  switch (params_rate(params)) {
96  case 44100:
98  break;
99  case 48000:
100  hdmi->params[1] = IEC958_AES3_CON_FS_48000;
101  break;
102  default: /* 96000 */
103  hdmi->params[1] = IEC958_AES3_CON_FS_96000;
104  break;
105  case 192000:
107  break;
108  }
109  hdmi->params[2] = params_channels(params) / 2 - 1;
110  if (params_format(params) == SNDRV_PCM_FORMAT_S16_LE)
111  hdmi->params[3] = 0;
112  else
113  hdmi->params[3] = 0xc0;
114  hdmi->params[4] = 1; /* ? */
115  hdmi_write_command(chip, 0x54, 5, hdmi->params);
116 }
117 
118 void xonar_hdmi_uart_input(struct oxygen *chip)
119 {
120  if (chip->uart_input_count >= 2 &&
121  chip->uart_input[chip->uart_input_count - 2] == 'O' &&
122  chip->uart_input[chip->uart_input_count - 1] == 'K') {
123  printk(KERN_DEBUG "message from HDMI chip received:\n");
124  print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
125  chip->uart_input, chip->uart_input_count);
126  chip->uart_input_count = 0;
127  }
128 }