1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * helper functions for HDMI models (Xonar HDAV1.3/HDAV1.3 Slim)
4 *
5 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
6 */
7
8#include <linux/pci.h>
9#include <linux/delay.h>
10#include <sound/asoundef.h>
11#include <sound/control.h>
12#include <sound/core.h>
13#include <sound/pcm.h>
14#include <sound/pcm_params.h>
15#include <sound/tlv.h>
16#include "xonar.h"
17
18static void hdmi_write_command(struct oxygen *chip, u8 command,
19			       unsigned int count, const u8 *params)
20{
21	unsigned int i;
22	u8 checksum;
23
24	oxygen_write_uart(chip, 0xfb);
25	oxygen_write_uart(chip, 0xef);
26	oxygen_write_uart(chip, command);
27	oxygen_write_uart(chip, count);
28	for (i = 0; i < count; ++i)
29		oxygen_write_uart(chip, params[i]);
30	checksum = 0xfb + 0xef + command + count;
31	for (i = 0; i < count; ++i)
32		checksum += params[i];
33	oxygen_write_uart(chip, checksum);
34}
35
36static void xonar_hdmi_init_commands(struct oxygen *chip,
37				     struct xonar_hdmi *hdmi)
38{
39	u8 param;
40
41	oxygen_reset_uart(chip);
42	param = 0;
43	hdmi_write_command(chip, 0x61, 1, &param);
44	param = 1;
45	hdmi_write_command(chip, 0x74, 1, &param);
46	hdmi_write_command(chip, 0x54, 5, hdmi->params);
47}
48
49void xonar_hdmi_init(struct oxygen *chip, struct xonar_hdmi *hdmi)
50{
51	hdmi->params[1] = IEC958_AES3_CON_FS_48000;
52	hdmi->params[4] = 1;
53	xonar_hdmi_init_commands(chip, hdmi);
54}
55
56void xonar_hdmi_cleanup(struct oxygen *chip)
57{
58	u8 param = 0;
59
60	hdmi_write_command(chip, 0x74, 1, &param);
61}
62
63void xonar_hdmi_resume(struct oxygen *chip, struct xonar_hdmi *hdmi)
64{
65	xonar_hdmi_init_commands(chip, hdmi);
66}
67
68void xonar_hdmi_pcm_hardware_filter(unsigned int channel,
69				    struct snd_pcm_hardware *hardware)
70{
71	if (channel == PCM_MULTICH) {
72		hardware->rates = SNDRV_PCM_RATE_44100 |
73				  SNDRV_PCM_RATE_48000 |
74				  SNDRV_PCM_RATE_96000 |
75				  SNDRV_PCM_RATE_192000;
76		hardware->rate_min = 44100;
77	}
78}
79
80void xonar_set_hdmi_params(struct oxygen *chip, struct xonar_hdmi *hdmi,
81			   struct snd_pcm_hw_params *params)
82{
83	hdmi->params[0] = 0; /* 1 = non-audio */
84	switch (params_rate(params)) {
85	case 44100:
86		hdmi->params[1] = IEC958_AES3_CON_FS_44100;
87		break;
88	case 48000:
89		hdmi->params[1] = IEC958_AES3_CON_FS_48000;
90		break;
91	default: /* 96000 */
92		hdmi->params[1] = IEC958_AES3_CON_FS_96000;
93		break;
94	case 192000:
95		hdmi->params[1] = IEC958_AES3_CON_FS_192000;
96		break;
97	}
98	hdmi->params[2] = params_channels(params) / 2 - 1;
99	if (params_format(params) == SNDRV_PCM_FORMAT_S16_LE)
100		hdmi->params[3] = 0;
101	else
102		hdmi->params[3] = 0xc0;
103	hdmi->params[4] = 1; /* ? */
104	hdmi_write_command(chip, 0x54, 5, hdmi->params);
105}
106
107void xonar_hdmi_uart_input(struct oxygen *chip)
108{
109	if (chip->uart_input_count >= 2 &&
110	    chip->uart_input[chip->uart_input_count - 2] == 'O' &&
111	    chip->uart_input[chip->uart_input_count - 1] == 'K') {
112		dev_dbg(chip->card->dev, "message from HDMI chip received:\n");
113		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
114				     chip->uart_input, chip->uart_input_count);
115		chip->uart_input_count = 0;
116	}
117}
118