118 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*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, ¶m);44 param = 1;45 hdmi_write_command(chip, 0x74, 1, ¶m);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, ¶m);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 else102 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