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 18 static 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 36 static 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 49 void 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 56 void xonar_hdmi_cleanup(struct oxygen *chip) 57 { 58 u8 param = 0; 59 60 hdmi_write_command(chip, 0x74, 1, ¶m); 61 } 62 63 void xonar_hdmi_resume(struct oxygen *chip, struct xonar_hdmi *hdmi) 64 { 65 xonar_hdmi_init_commands(chip, hdmi); 66 } 67 68 void 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 80 void 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 } 106 107 void 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