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/*
* helper functions for HDMI models (Xonar HDAV1.3)
*
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
*
*
* This driver is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2.
*
* This driver is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this driver; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/pci.h>
#include <linux/delay.h>
#include <sound/asoundef.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
#include "xonar.h"
static void hdmi_write_command(struct oxygen *chip, u8 command,
unsigned int count, const u8 *params)
{
unsigned int i;
u8 checksum;
oxygen_write_uart(chip, 0xfb);
oxygen_write_uart(chip, 0xef);
oxygen_write_uart(chip, command);
oxygen_write_uart(chip, count);
for (i = 0; i < count; ++i)
oxygen_write_uart(chip, params[i]);
checksum = 0xfb + 0xef + command + count;
for (i = 0; i < count; ++i)
checksum += params[i];
oxygen_write_uart(chip, checksum);
}
static void xonar_hdmi_init_commands(struct oxygen *chip,
struct xonar_hdmi *hdmi)
{
u8 param;
oxygen_reset_uart(chip);
param = 0;
hdmi_write_command(chip, 0x61, 1, ¶m);
param = 1;
hdmi_write_command(chip, 0x74, 1, ¶m);
hdmi_write_command(chip, 0x54, 5, hdmi->params);
}
void xonar_hdmi_init(struct oxygen *chip, struct xonar_hdmi *hdmi)
{
hdmi->params[1] = IEC958_AES3_CON_FS_48000;
hdmi->params[4] = 1;
xonar_hdmi_init_commands(chip, hdmi);
}
void xonar_hdmi_cleanup(struct oxygen *chip)
{
u8 param = 0;
hdmi_write_command(chip, 0x74, 1, ¶m);
}
void xonar_hdmi_resume(struct oxygen *chip, struct xonar_hdmi *hdmi)
{
xonar_hdmi_init_commands(chip, hdmi);
}
void xonar_hdmi_pcm_hardware_filter(unsigned int channel,
struct snd_pcm_hardware *hardware)
{
if (channel == PCM_MULTICH) {
hardware->rates = SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_96000 |
SNDRV_PCM_RATE_192000;
hardware->rate_min = 44100;
}
}
void xonar_set_hdmi_params(struct oxygen *chip, struct xonar_hdmi *hdmi,
struct snd_pcm_hw_params *params)
{
hdmi->params[0] = 0; /* 1 = non-audio */
switch (params_rate(params)) {
case 44100:
hdmi->params[1] = IEC958_AES3_CON_FS_44100;
break;
case 48000:
hdmi->params[1] = IEC958_AES3_CON_FS_48000;
break;
default: /* 96000 */
hdmi->params[1] = IEC958_AES3_CON_FS_96000;
break;
case 192000:
hdmi->params[1] = IEC958_AES3_CON_FS_192000;
break;
}
hdmi->params[2] = params_channels(params) / 2 - 1;
if (params_format(params) == SNDRV_PCM_FORMAT_S16_LE)
hdmi->params[3] = 0;
else
hdmi->params[3] = 0xc0;
hdmi->params[4] = 1; /* ? */
hdmi_write_command(chip, 0x54, 5, hdmi->params);
}
void xonar_hdmi_uart_input(struct oxygen *chip)
{
if (chip->uart_input_count >= 2 &&
chip->uart_input[chip->uart_input_count - 2] == 'O' &&
chip->uart_input[chip->uart_input_count - 1] == 'K') {
printk(KERN_DEBUG "message from HDMI chip received:\n");
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
chip->uart_input, chip->uart_input_count);
chip->uart_input_count = 0;
}
}
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