diff options
Diffstat (limited to 'sound/i2c/other/ak4117.c')
| -rw-r--r-- | sound/i2c/other/ak4117.c | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/sound/i2c/other/ak4117.c b/sound/i2c/other/ak4117.c new file mode 100644 index 000000000..48848909a --- /dev/null +++ b/sound/i2c/other/ak4117.c @@ -0,0 +1,548 @@ +/* + * Routines for control of the AK4117 via 4-wire serial interface + * IEC958 (S/PDIF) receiver by Asahi Kasei + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/module.h> +#include <sound/core.h> +#include <sound/control.h> +#include <sound/pcm.h> +#include <sound/ak4117.h> +#include <sound/asoundef.h> + +MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); +MODULE_DESCRIPTION("AK4117 IEC958 (S/PDIF) receiver by Asahi Kasei"); +MODULE_LICENSE("GPL"); + +#define AK4117_ADDR 0x00 /* fixed address */ + +static void snd_ak4117_timer(unsigned long data); + +static void reg_write(struct ak4117 *ak4117, unsigned char reg, unsigned char val) +{ + ak4117->write(ak4117->private_data, reg, val); + if (reg < sizeof(ak4117->regmap)) + ak4117->regmap[reg] = val; +} + +static inline unsigned char reg_read(struct ak4117 *ak4117, unsigned char reg) +{ + return ak4117->read(ak4117->private_data, reg); +} + +#if 0 +static void reg_dump(struct ak4117 *ak4117) +{ + int i; + + printk(KERN_DEBUG "AK4117 REG DUMP:\n"); + for (i = 0; i < 0x1b; i++) + printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4117, i), i < sizeof(ak4117->regmap) ? ak4117->regmap[i] : 0); +} +#endif + +static void snd_ak4117_free(struct ak4117 *chip) +{ + del_timer_sync(&chip->timer); + kfree(chip); +} + +static int snd_ak4117_dev_free(struct snd_device *device) +{ + struct ak4117 *chip = device->device_data; + snd_ak4117_free(chip); + return 0; +} + +int snd_ak4117_create(struct snd_card *card, ak4117_read_t *read, ak4117_write_t *write, + const unsigned char pgm[5], void *private_data, struct ak4117 **r_ak4117) +{ + struct ak4117 *chip; + int err = 0; + unsigned char reg; + static struct snd_device_ops ops = { + .dev_free = snd_ak4117_dev_free, + }; + + chip = kzalloc(sizeof(*chip), GFP_KERNEL); + if (chip == NULL) + return -ENOMEM; + spin_lock_init(&chip->lock); + chip->card = card; + chip->read = read; + chip->write = write; + chip->private_data = private_data; + setup_timer(&chip->timer, snd_ak4117_timer, (unsigned long)chip); + + for (reg = 0; reg < 5; reg++) + chip->regmap[reg] = pgm[reg]; + snd_ak4117_reinit(chip); + + chip->rcs0 = reg_read(chip, AK4117_REG_RCS0) & ~(AK4117_QINT | AK4117_CINT | AK4117_STC); + chip->rcs1 = reg_read(chip, AK4117_REG_RCS1); + chip->rcs2 = reg_read(chip, AK4117_REG_RCS2); + + if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0) + goto __fail; + + if (r_ak4117) + *r_ak4117 = chip; + return 0; + + __fail: + snd_ak4117_free(chip); + return err < 0 ? err : -EIO; +} + +void snd_ak4117_reg_write(struct ak4117 *chip, unsigned char reg, unsigned char mask, unsigned char val) +{ + if (reg >= 5) + return; + reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val); +} + +void snd_ak4117_reinit(struct ak4117 *chip) +{ + unsigned char old = chip->regmap[AK4117_REG_PWRDN], reg; + + del_timer(&chip->timer); + chip->init = 1; + /* bring the chip to reset state and powerdown state */ + reg_write(chip, AK4117_REG_PWRDN, 0); + udelay(200); + /* release reset, but leave powerdown */ + reg_write(chip, AK4117_REG_PWRDN, (old | AK4117_RST) & ~AK4117_PWN); + udelay(200); + for (reg = 1; reg < 5; reg++) + reg_write(chip, reg, chip->regmap[reg]); + /* release powerdown, everything is initialized now */ + reg_write(chip, AK4117_REG_PWRDN, old | AK4117_RST | AK4117_PWN); + chip->init = 0; + mod_timer(&chip->timer, 1 + jiffies); +} + +static unsigned int external_rate(unsigned char rcs1) +{ + switch (rcs1 & (AK4117_FS0|AK4117_FS1|AK4117_FS2|AK4117_FS3)) { + case AK4117_FS_32000HZ: return 32000; + case AK4117_FS_44100HZ: return 44100; + case AK4117_FS_48000HZ: return 48000; + case AK4117_FS_88200HZ: return 88200; + case AK4117_FS_96000HZ: return 96000; + case AK4117_FS_176400HZ: return 176400; + case AK4117_FS_192000HZ: return 192000; + default: return 0; + } +} + +static int snd_ak4117_in_error_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = LONG_MAX; + return 0; +} + +static int snd_ak4117_in_error_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4117 *chip = snd_kcontrol_chip(kcontrol); + long *ptr; + + spin_lock_irq(&chip->lock); + ptr = (long *)(((char *)chip) + kcontrol->private_value); + ucontrol->value.integer.value[0] = *ptr; + *ptr = 0; + spin_unlock_irq(&chip->lock); + return 0; +} + +#define snd_ak4117_in_bit_info snd_ctl_boolean_mono_info + +static int snd_ak4117_in_bit_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4117 *chip = snd_kcontrol_chip(kcontrol); + unsigned char reg = kcontrol->private_value & 0xff; + unsigned char bit = (kcontrol->private_value >> 8) & 0xff; + unsigned char inv = (kcontrol->private_value >> 31) & 1; + + ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv; + return 0; +} + +static int snd_ak4117_rx_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 1; + return 0; +} + +static int snd_ak4117_rx_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4117 *chip = snd_kcontrol_chip(kcontrol); + + ucontrol->value.integer.value[0] = (chip->regmap[AK4117_REG_IO] & AK4117_IPS) ? 1 : 0; + return 0; +} + +static int snd_ak4117_rx_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4117 *chip = snd_kcontrol_chip(kcontrol); + int change; + u8 old_val; + + spin_lock_irq(&chip->lock); + old_val = chip->regmap[AK4117_REG_IO]; + change = !!ucontrol->value.integer.value[0] != ((old_val & AK4117_IPS) ? 1 : 0); + if (change) + reg_write(chip, AK4117_REG_IO, (old_val & ~AK4117_IPS) | (ucontrol->value.integer.value[0] ? AK4117_IPS : 0)); + spin_unlock_irq(&chip->lock); + return change; +} + +static int snd_ak4117_rate_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 192000; + return 0; +} + +static int snd_ak4117_rate_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4117 *chip = snd_kcontrol_chip(kcontrol); + + ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4117_REG_RCS1)); + return 0; +} + +static int snd_ak4117_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; + uinfo->count = 1; + return 0; +} + +static int snd_ak4117_spdif_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4117 *chip = snd_kcontrol_chip(kcontrol); + unsigned i; + + for (i = 0; i < AK4117_REG_RXCSB_SIZE; i++) + ucontrol->value.iec958.status[i] = reg_read(chip, AK4117_REG_RXCSB0 + i); + return 0; +} + +static int snd_ak4117_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; + uinfo->count = 1; + return 0; +} + +static int snd_ak4117_spdif_mask_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + memset(ucontrol->value.iec958.status, 0xff, AK4117_REG_RXCSB_SIZE); + return 0; +} + +static int snd_ak4117_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 0xffff; + uinfo->count = 4; + return 0; +} + +static int snd_ak4117_spdif_pget(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4117 *chip = snd_kcontrol_chip(kcontrol); + unsigned short tmp; + + ucontrol->value.integer.value[0] = 0xf8f2; + ucontrol->value.integer.value[1] = 0x4e1f; + tmp = reg_read(chip, AK4117_REG_Pc0) | (reg_read(chip, AK4117_REG_Pc1) << 8); + ucontrol->value.integer.value[2] = tmp; + tmp = reg_read(chip, AK4117_REG_Pd0) | (reg_read(chip, AK4117_REG_Pd1) << 8); + ucontrol->value.integer.value[3] = tmp; + return 0; +} + +static int snd_ak4117_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; + uinfo->count = AK4117_REG_QSUB_SIZE; + return 0; +} + +static int snd_ak4117_spdif_qget(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct ak4117 *chip = snd_kcontrol_chip(kcontrol); + unsigned i; + + for (i = 0; i < AK4117_REG_QSUB_SIZE; i++) + ucontrol->value.bytes.data[i] = reg_read(chip, AK4117_REG_QSUB_ADDR + i); + return 0; +} + +/* Don't forget to change AK4117_CONTROLS define!!! */ +static struct snd_kcontrol_new snd_ak4117_iec958_controls[] = { +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Parity Errors", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_in_error_info, + .get = snd_ak4117_in_error_get, + .private_value = offsetof(struct ak4117, parity_errors), +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 V-Bit Errors", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_in_error_info, + .get = snd_ak4117_in_error_get, + .private_value = offsetof(struct ak4117, v_bit_errors), +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 C-CRC Errors", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_in_error_info, + .get = snd_ak4117_in_error_get, + .private_value = offsetof(struct ak4117, ccrc_errors), +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Q-CRC Errors", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_in_error_info, + .get = snd_ak4117_in_error_get, + .private_value = offsetof(struct ak4117, qcrc_errors), +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 External Rate", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_rate_info, + .get = snd_ak4117_rate_get, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK), + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .info = snd_ak4117_spdif_mask_info, + .get = snd_ak4117_spdif_mask_get, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT), + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_spdif_info, + .get = snd_ak4117_spdif_get, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Preamble Capture Default", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_spdif_pinfo, + .get = snd_ak4117_spdif_pget, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Q-subcode Capture Default", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_spdif_qinfo, + .get = snd_ak4117_spdif_qget, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Audio", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_in_bit_info, + .get = snd_ak4117_in_bit_get, + .private_value = (1<<31) | (3<<8) | AK4117_REG_RCS0, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 Non-PCM Bitstream", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_in_bit_info, + .get = snd_ak4117_in_bit_get, + .private_value = (5<<8) | AK4117_REG_RCS1, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "IEC958 DTS Bitstream", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .info = snd_ak4117_in_bit_info, + .get = snd_ak4117_in_bit_get, + .private_value = (6<<8) | AK4117_REG_RCS1, +}, +{ + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .name = "AK4117 Input Select", + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE, + .info = snd_ak4117_rx_info, + .get = snd_ak4117_rx_get, + .put = snd_ak4117_rx_put, +} +}; + +int snd_ak4117_build(struct ak4117 *ak4117, struct snd_pcm_substream *cap_substream) +{ + struct snd_kcontrol *kctl; + unsigned int idx; + int err; + + if (snd_BUG_ON(!cap_substream)) + return -EINVAL; + ak4117->substream = cap_substream; + for (idx = 0; idx < AK4117_CONTROLS; idx++) { + kctl = snd_ctl_new1(&snd_ak4117_iec958_controls[idx], ak4117); + if (kctl == NULL) + return -ENOMEM; + 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); + mod_timer(&chip->timer, 1 + jiffies); +} + +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); |