552 lines
16 KiB
C
552 lines
16 KiB
C
/*
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* Routines for control of the AK4117 via 4-wire serial interface
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* IEC958 (S/PDIF) receiver by Asahi Kasei
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/pcm.h>
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#include <sound/ak4117.h>
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#include <sound/asoundef.h>
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MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
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MODULE_DESCRIPTION("AK4117 IEC958 (S/PDIF) receiver by Asahi Kasei");
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MODULE_LICENSE("GPL");
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#define AK4117_ADDR 0x00 /* fixed address */
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static void snd_ak4117_timer(unsigned long data);
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static void reg_write(struct ak4117 *ak4117, unsigned char reg, unsigned char val)
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{
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ak4117->write(ak4117->private_data, reg, val);
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if (reg < sizeof(ak4117->regmap))
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ak4117->regmap[reg] = val;
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}
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static inline unsigned char reg_read(struct ak4117 *ak4117, unsigned char reg)
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{
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return ak4117->read(ak4117->private_data, reg);
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}
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#if 0
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static void reg_dump(struct ak4117 *ak4117)
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{
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int i;
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printk(KERN_DEBUG "AK4117 REG DUMP:\n");
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for (i = 0; i < 0x1b; i++)
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printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4117, i), i < sizeof(ak4117->regmap) ? ak4117->regmap[i] : 0);
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}
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#endif
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static void snd_ak4117_free(struct ak4117 *chip)
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{
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del_timer(&chip->timer);
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kfree(chip);
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}
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static int snd_ak4117_dev_free(struct snd_device *device)
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{
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struct ak4117 *chip = device->device_data;
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snd_ak4117_free(chip);
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return 0;
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}
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int snd_ak4117_create(struct snd_card *card, ak4117_read_t *read, ak4117_write_t *write,
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const unsigned char pgm[5], void *private_data, struct ak4117 **r_ak4117)
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{
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struct ak4117 *chip;
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int err = 0;
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unsigned char reg;
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static struct snd_device_ops ops = {
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.dev_free = snd_ak4117_dev_free,
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};
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chip = kzalloc(sizeof(*chip), GFP_KERNEL);
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if (chip == NULL)
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return -ENOMEM;
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spin_lock_init(&chip->lock);
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chip->card = card;
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chip->read = read;
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chip->write = write;
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chip->private_data = private_data;
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init_timer(&chip->timer);
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chip->timer.data = (unsigned long)chip;
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chip->timer.function = snd_ak4117_timer;
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for (reg = 0; reg < 5; reg++)
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chip->regmap[reg] = pgm[reg];
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snd_ak4117_reinit(chip);
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chip->rcs0 = reg_read(chip, AK4117_REG_RCS0) & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
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chip->rcs1 = reg_read(chip, AK4117_REG_RCS1);
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chip->rcs2 = reg_read(chip, AK4117_REG_RCS2);
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if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
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goto __fail;
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if (r_ak4117)
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*r_ak4117 = chip;
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return 0;
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__fail:
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snd_ak4117_free(chip);
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return err < 0 ? err : -EIO;
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}
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void snd_ak4117_reg_write(struct ak4117 *chip, unsigned char reg, unsigned char mask, unsigned char val)
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{
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if (reg >= 5)
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return;
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reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
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}
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void snd_ak4117_reinit(struct ak4117 *chip)
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{
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unsigned char old = chip->regmap[AK4117_REG_PWRDN], reg;
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del_timer(&chip->timer);
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chip->init = 1;
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/* bring the chip to reset state and powerdown state */
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reg_write(chip, AK4117_REG_PWRDN, 0);
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udelay(200);
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/* release reset, but leave powerdown */
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reg_write(chip, AK4117_REG_PWRDN, (old | AK4117_RST) & ~AK4117_PWN);
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udelay(200);
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for (reg = 1; reg < 5; reg++)
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reg_write(chip, reg, chip->regmap[reg]);
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/* release powerdown, everything is initialized now */
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reg_write(chip, AK4117_REG_PWRDN, old | AK4117_RST | AK4117_PWN);
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chip->init = 0;
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chip->timer.expires = 1 + jiffies;
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add_timer(&chip->timer);
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}
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static unsigned int external_rate(unsigned char rcs1)
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{
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switch (rcs1 & (AK4117_FS0|AK4117_FS1|AK4117_FS2|AK4117_FS3)) {
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case AK4117_FS_32000HZ: return 32000;
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case AK4117_FS_44100HZ: return 44100;
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case AK4117_FS_48000HZ: return 48000;
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case AK4117_FS_88200HZ: return 88200;
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case AK4117_FS_96000HZ: return 96000;
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case AK4117_FS_176400HZ: return 176400;
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case AK4117_FS_192000HZ: return 192000;
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default: return 0;
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}
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}
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static int snd_ak4117_in_error_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = LONG_MAX;
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return 0;
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}
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static int snd_ak4117_in_error_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
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long *ptr;
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spin_lock_irq(&chip->lock);
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ptr = (long *)(((char *)chip) + kcontrol->private_value);
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ucontrol->value.integer.value[0] = *ptr;
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*ptr = 0;
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spin_unlock_irq(&chip->lock);
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return 0;
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}
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#define snd_ak4117_in_bit_info snd_ctl_boolean_mono_info
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static int snd_ak4117_in_bit_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
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unsigned char reg = kcontrol->private_value & 0xff;
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unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
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unsigned char inv = (kcontrol->private_value >> 31) & 1;
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ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
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return 0;
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}
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static int snd_ak4117_rx_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = 1;
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return 0;
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}
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static int snd_ak4117_rx_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
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ucontrol->value.integer.value[0] = (chip->regmap[AK4117_REG_IO] & AK4117_IPS) ? 1 : 0;
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return 0;
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}
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static int snd_ak4117_rx_put(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
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int change;
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u8 old_val;
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spin_lock_irq(&chip->lock);
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old_val = chip->regmap[AK4117_REG_IO];
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change = !!ucontrol->value.integer.value[0] != ((old_val & AK4117_IPS) ? 1 : 0);
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if (change)
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reg_write(chip, AK4117_REG_IO, (old_val & ~AK4117_IPS) | (ucontrol->value.integer.value[0] ? AK4117_IPS : 0));
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spin_unlock_irq(&chip->lock);
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return change;
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}
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static int snd_ak4117_rate_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = 192000;
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return 0;
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}
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static int snd_ak4117_rate_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
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ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4117_REG_RCS1));
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return 0;
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}
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static int snd_ak4117_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
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uinfo->count = 1;
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return 0;
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}
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static int snd_ak4117_spdif_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
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unsigned i;
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for (i = 0; i < AK4117_REG_RXCSB_SIZE; i++)
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ucontrol->value.iec958.status[i] = reg_read(chip, AK4117_REG_RXCSB0 + i);
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return 0;
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}
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static int snd_ak4117_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
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uinfo->count = 1;
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return 0;
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}
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static int snd_ak4117_spdif_mask_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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memset(ucontrol->value.iec958.status, 0xff, AK4117_REG_RXCSB_SIZE);
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return 0;
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}
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static int snd_ak4117_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = 0xffff;
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uinfo->count = 4;
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return 0;
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}
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static int snd_ak4117_spdif_pget(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
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unsigned short tmp;
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ucontrol->value.integer.value[0] = 0xf8f2;
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ucontrol->value.integer.value[1] = 0x4e1f;
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tmp = reg_read(chip, AK4117_REG_Pc0) | (reg_read(chip, AK4117_REG_Pc1) << 8);
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ucontrol->value.integer.value[2] = tmp;
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tmp = reg_read(chip, AK4117_REG_Pd0) | (reg_read(chip, AK4117_REG_Pd1) << 8);
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ucontrol->value.integer.value[3] = tmp;
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return 0;
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}
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static int snd_ak4117_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
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uinfo->count = AK4117_REG_QSUB_SIZE;
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return 0;
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}
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static int snd_ak4117_spdif_qget(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct ak4117 *chip = snd_kcontrol_chip(kcontrol);
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unsigned i;
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for (i = 0; i < AK4117_REG_QSUB_SIZE; i++)
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ucontrol->value.bytes.data[i] = reg_read(chip, AK4117_REG_QSUB_ADDR + i);
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return 0;
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}
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/* Don't forget to change AK4117_CONTROLS define!!! */
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static struct snd_kcontrol_new snd_ak4117_iec958_controls[] = {
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 Parity Errors",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_in_error_info,
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.get = snd_ak4117_in_error_get,
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.private_value = offsetof(struct ak4117, parity_errors),
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 V-Bit Errors",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_in_error_info,
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.get = snd_ak4117_in_error_get,
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.private_value = offsetof(struct ak4117, v_bit_errors),
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 C-CRC Errors",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_in_error_info,
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.get = snd_ak4117_in_error_get,
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.private_value = offsetof(struct ak4117, ccrc_errors),
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 Q-CRC Errors",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_in_error_info,
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.get = snd_ak4117_in_error_get,
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.private_value = offsetof(struct ak4117, qcrc_errors),
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 External Rate",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_rate_info,
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.get = snd_ak4117_rate_get,
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
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.access = SNDRV_CTL_ELEM_ACCESS_READ,
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.info = snd_ak4117_spdif_mask_info,
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.get = snd_ak4117_spdif_mask_get,
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_spdif_info,
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.get = snd_ak4117_spdif_get,
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 Preample Capture Default",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_spdif_pinfo,
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.get = snd_ak4117_spdif_pget,
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 Q-subcode Capture Default",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_spdif_qinfo,
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.get = snd_ak4117_spdif_qget,
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 Audio",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_in_bit_info,
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.get = snd_ak4117_in_bit_get,
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.private_value = (1<<31) | (3<<8) | AK4117_REG_RCS0,
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 Non-PCM Bitstream",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_in_bit_info,
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.get = snd_ak4117_in_bit_get,
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.private_value = (5<<8) | AK4117_REG_RCS1,
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "IEC958 DTS Bitstream",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.info = snd_ak4117_in_bit_info,
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.get = snd_ak4117_in_bit_get,
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.private_value = (6<<8) | AK4117_REG_RCS1,
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},
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{
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "AK4117 Input Select",
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.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE,
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.info = snd_ak4117_rx_info,
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.get = snd_ak4117_rx_get,
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.put = snd_ak4117_rx_put,
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}
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};
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int snd_ak4117_build(struct ak4117 *ak4117, struct snd_pcm_substream *cap_substream)
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{
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struct snd_kcontrol *kctl;
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unsigned int idx;
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int err;
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if (snd_BUG_ON(!cap_substream))
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return -EINVAL;
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ak4117->substream = cap_substream;
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for (idx = 0; idx < AK4117_CONTROLS; idx++) {
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kctl = snd_ctl_new1(&snd_ak4117_iec958_controls[idx], ak4117);
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if (kctl == NULL)
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return -ENOMEM;
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kctl->id.device = cap_substream->pcm->device;
|
|
kctl->id.subdevice = cap_substream->number;
|
|
err = snd_ctl_add(ak4117->card, kctl);
|
|
if (err < 0)
|
|
return err;
|
|
ak4117->kctls[idx] = kctl;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int snd_ak4117_external_rate(struct ak4117 *ak4117)
|
|
{
|
|
unsigned char rcs1;
|
|
|
|
rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
|
|
return external_rate(rcs1);
|
|
}
|
|
|
|
int snd_ak4117_check_rate_and_errors(struct ak4117 *ak4117, unsigned int flags)
|
|
{
|
|
struct snd_pcm_runtime *runtime = ak4117->substream ? ak4117->substream->runtime : NULL;
|
|
unsigned long _flags;
|
|
int res = 0;
|
|
unsigned char rcs0, rcs1, rcs2;
|
|
unsigned char c0, c1;
|
|
|
|
rcs1 = reg_read(ak4117, AK4117_REG_RCS1);
|
|
if (flags & AK4117_CHECK_NO_STAT)
|
|
goto __rate;
|
|
rcs0 = reg_read(ak4117, AK4117_REG_RCS0);
|
|
rcs2 = reg_read(ak4117, AK4117_REG_RCS2);
|
|
// printk(KERN_DEBUG "AK IRQ: rcs0 = 0x%x, rcs1 = 0x%x, rcs2 = 0x%x\n", rcs0, rcs1, rcs2);
|
|
spin_lock_irqsave(&ak4117->lock, _flags);
|
|
if (rcs0 & AK4117_PAR)
|
|
ak4117->parity_errors++;
|
|
if (rcs0 & AK4117_V)
|
|
ak4117->v_bit_errors++;
|
|
if (rcs2 & AK4117_CCRC)
|
|
ak4117->ccrc_errors++;
|
|
if (rcs2 & AK4117_QCRC)
|
|
ak4117->qcrc_errors++;
|
|
c0 = (ak4117->rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK)) ^
|
|
(rcs0 & (AK4117_QINT | AK4117_CINT | AK4117_STC | AK4117_AUDION | AK4117_AUTO | AK4117_UNLCK));
|
|
c1 = (ak4117->rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f)) ^
|
|
(rcs1 & (AK4117_DTSCD | AK4117_NPCM | AK4117_PEM | 0x0f));
|
|
ak4117->rcs0 = rcs0 & ~(AK4117_QINT | AK4117_CINT | AK4117_STC);
|
|
ak4117->rcs1 = rcs1;
|
|
ak4117->rcs2 = rcs2;
|
|
spin_unlock_irqrestore(&ak4117->lock, _flags);
|
|
|
|
if (rcs0 & AK4117_PAR)
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[0]->id);
|
|
if (rcs0 & AK4117_V)
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[1]->id);
|
|
if (rcs2 & AK4117_CCRC)
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[2]->id);
|
|
if (rcs2 & AK4117_QCRC)
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[3]->id);
|
|
|
|
/* rate change */
|
|
if (c1 & 0x0f)
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[4]->id);
|
|
|
|
if ((c1 & AK4117_PEM) | (c0 & AK4117_CINT))
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[6]->id);
|
|
if (c0 & AK4117_QINT)
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[8]->id);
|
|
|
|
if (c0 & AK4117_AUDION)
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[9]->id);
|
|
if (c1 & AK4117_NPCM)
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[10]->id);
|
|
if (c1 & AK4117_DTSCD)
|
|
snd_ctl_notify(ak4117->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4117->kctls[11]->id);
|
|
|
|
if (ak4117->change_callback && (c0 | c1) != 0)
|
|
ak4117->change_callback(ak4117, c0, c1);
|
|
|
|
__rate:
|
|
/* compare rate */
|
|
res = external_rate(rcs1);
|
|
if (!(flags & AK4117_CHECK_NO_RATE) && runtime && runtime->rate != res) {
|
|
snd_pcm_stream_lock_irqsave(ak4117->substream, _flags);
|
|
if (snd_pcm_running(ak4117->substream)) {
|
|
// printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
|
|
snd_pcm_stop(ak4117->substream, SNDRV_PCM_STATE_DRAINING);
|
|
wake_up(&runtime->sleep);
|
|
res = 1;
|
|
}
|
|
snd_pcm_stream_unlock_irqrestore(ak4117->substream, _flags);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static void snd_ak4117_timer(unsigned long data)
|
|
{
|
|
struct ak4117 *chip = (struct ak4117 *)data;
|
|
|
|
if (chip->init)
|
|
return;
|
|
snd_ak4117_check_rate_and_errors(chip, 0);
|
|
chip->timer.expires = 1 + jiffies;
|
|
add_timer(&chip->timer);
|
|
}
|
|
|
|
EXPORT_SYMBOL(snd_ak4117_create);
|
|
EXPORT_SYMBOL(snd_ak4117_reg_write);
|
|
EXPORT_SYMBOL(snd_ak4117_reinit);
|
|
EXPORT_SYMBOL(snd_ak4117_build);
|
|
EXPORT_SYMBOL(snd_ak4117_external_rate);
|
|
EXPORT_SYMBOL(snd_ak4117_check_rate_and_errors);
|