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-rw-r--r--sound/i2c/cs8427.c619
1 files changed, 619 insertions, 0 deletions
diff --git a/sound/i2c/cs8427.c b/sound/i2c/cs8427.c
new file mode 100644
index 000000000..f58b14b49
--- /dev/null
+++ b/sound/i2c/cs8427.c
@@ -0,0 +1,619 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Routines for control of the CS8427 via i2c bus
+ * IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/bitrev.h>
+#include <linux/module.h>
+#include <asm/unaligned.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/cs8427.h>
+#include <sound/asoundef.h>
+
+static void snd_cs8427_reset(struct snd_i2c_device *cs8427);
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
+MODULE_DESCRIPTION("IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic");
+MODULE_LICENSE("GPL");
+
+#define CS8427_ADDR (0x20>>1) /* fixed address */
+
+struct cs8427_stream {
+ struct snd_pcm_substream *substream;
+ char hw_status[24]; /* hardware status */
+ char def_status[24]; /* default status */
+ char pcm_status[24]; /* PCM private status */
+ char hw_udata[32];
+ struct snd_kcontrol *pcm_ctl;
+};
+
+struct cs8427 {
+ unsigned char regmap[0x14]; /* map of first 1 + 13 registers */
+ unsigned int rate;
+ unsigned int reset_timeout;
+ struct cs8427_stream playback;
+ struct cs8427_stream capture;
+};
+
+int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg,
+ unsigned char val)
+{
+ int err;
+ unsigned char buf[2];
+
+ buf[0] = reg & 0x7f;
+ buf[1] = val;
+ err = snd_i2c_sendbytes(device, buf, 2);
+ if (err != 2) {
+ snd_printk(KERN_ERR "unable to send bytes 0x%02x:0x%02x "
+ "to CS8427 (%i)\n", buf[0], buf[1], err);
+ return err < 0 ? err : -EIO;
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_cs8427_reg_write);
+
+static int snd_cs8427_reg_read(struct snd_i2c_device *device, unsigned char reg)
+{
+ int err;
+ unsigned char buf;
+
+ err = snd_i2c_sendbytes(device, &reg, 1);
+ if (err != 1) {
+ snd_printk(KERN_ERR "unable to send register 0x%x byte "
+ "to CS8427\n", reg);
+ return err < 0 ? err : -EIO;
+ }
+ err = snd_i2c_readbytes(device, &buf, 1);
+ if (err != 1) {
+ snd_printk(KERN_ERR "unable to read register 0x%x byte "
+ "from CS8427\n", reg);
+ return err < 0 ? err : -EIO;
+ }
+ return buf;
+}
+
+static int snd_cs8427_select_corudata(struct snd_i2c_device *device, int udata)
+{
+ struct cs8427 *chip = device->private_data;
+ int err;
+
+ udata = udata ? CS8427_BSEL : 0;
+ if (udata != (chip->regmap[CS8427_REG_CSDATABUF] & udata)) {
+ chip->regmap[CS8427_REG_CSDATABUF] &= ~CS8427_BSEL;
+ chip->regmap[CS8427_REG_CSDATABUF] |= udata;
+ err = snd_cs8427_reg_write(device, CS8427_REG_CSDATABUF,
+ chip->regmap[CS8427_REG_CSDATABUF]);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+
+static int snd_cs8427_send_corudata(struct snd_i2c_device *device,
+ int udata,
+ unsigned char *ndata,
+ int count)
+{
+ struct cs8427 *chip = device->private_data;
+ char *hw_data = udata ?
+ chip->playback.hw_udata : chip->playback.hw_status;
+ unsigned char data[32];
+ int err, idx;
+
+ if (!memcmp(hw_data, ndata, count))
+ return 0;
+ err = snd_cs8427_select_corudata(device, udata);
+ if (err < 0)
+ return err;
+ memcpy(hw_data, ndata, count);
+ if (udata) {
+ memset(data, 0, sizeof(data));
+ if (memcmp(hw_data, data, count) == 0) {
+ chip->regmap[CS8427_REG_UDATABUF] &= ~CS8427_UBMMASK;
+ chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS |
+ CS8427_EFTUI;
+ err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF,
+ chip->regmap[CS8427_REG_UDATABUF]);
+ return err < 0 ? err : 0;
+ }
+ }
+ data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF;
+ for (idx = 0; idx < count; idx++)
+ data[idx + 1] = bitrev8(ndata[idx]);
+ if (snd_i2c_sendbytes(device, data, count + 1) != count + 1)
+ return -EIO;
+ return 1;
+}
+
+static void snd_cs8427_free(struct snd_i2c_device *device)
+{
+ kfree(device->private_data);
+}
+
+int snd_cs8427_init(struct snd_i2c_bus *bus,
+ struct snd_i2c_device *device)
+{
+ static unsigned char initvals1[] = {
+ CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC,
+ /* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes,
+ TCBL=output */
+ CS8427_SWCLK | CS8427_TCBLDIR,
+ /* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs,
+ normal stereo operation */
+ 0x00,
+ /* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial,
+ Rx=>serial */
+ CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER,
+ /* CS8427_REG_CLOCKSOURCE: Run off, CMCK=256*Fs,
+ output time base = OMCK, input time base = recovered input clock,
+ recovered input clock source is ILRCK changed to AES3INPUT
+ (workaround, see snd_cs8427_reset) */
+ CS8427_RXDILRCK,
+ /* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S,
+ 24-bit, 64*Fsi */
+ CS8427_SIDEL | CS8427_SILRPOL,
+ /* CS8427_REG_SERIALOUTPUT: Serial audio output port data format
+ = I2S, 24-bit, 64*Fsi */
+ CS8427_SODEL | CS8427_SOLRPOL,
+ };
+ static unsigned char initvals2[] = {
+ CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC,
+ /* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence,
+ biphase, parity status bits */
+ /* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR,*/
+ 0xff, /* set everything */
+ /* CS8427_REG_CSDATABUF:
+ Registers 32-55 window to CS buffer
+ Inhibit D->E transfers from overwriting first 5 bytes of CS data.
+ Inhibit D->E transfers (all) of CS data.
+ Allow E->F transfer of CS data.
+ One byte mode; both A/B channels get same written CB data.
+ A channel info is output to chip's EMPH* pin. */
+ CS8427_CBMR | CS8427_DETCI,
+ /* CS8427_REG_UDATABUF:
+ Use internal buffer to transmit User (U) data.
+ Chip's U pin is an output.
+ Transmit all O's for user data.
+ Inhibit D->E transfers.
+ Inhibit E->F transfers. */
+ CS8427_UD | CS8427_EFTUI | CS8427_DETUI,
+ };
+ struct cs8427 *chip = device->private_data;
+ int err;
+ unsigned char buf[24];
+
+ snd_i2c_lock(bus);
+ err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
+ if (err != CS8427_VER8427A) {
+ /* give second chance */
+ snd_printk(KERN_WARNING "invalid CS8427 signature 0x%x: "
+ "let me try again...\n", err);
+ err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
+ }
+ if (err != CS8427_VER8427A) {
+ snd_i2c_unlock(bus);
+ snd_printk(KERN_ERR "unable to find CS8427 signature "
+ "(expected 0x%x, read 0x%x),\n",
+ CS8427_VER8427A, err);
+ snd_printk(KERN_ERR " initialization is not completed\n");
+ return -EFAULT;
+ }
+ /* turn off run bit while making changes to configuration */
+ err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00);
+ if (err < 0)
+ goto __fail;
+ /* send initial values */
+ memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6);
+ err = snd_i2c_sendbytes(device, initvals1, 7);
+ if (err != 7) {
+ err = err < 0 ? err : -EIO;
+ goto __fail;
+ }
+ /* Turn off CS8427 interrupt stuff that is not used in hardware */
+ memset(buf, 0, 7);
+ /* from address 9 to 15 */
+ buf[0] = 9; /* register */
+ err = snd_i2c_sendbytes(device, buf, 7);
+ if (err != 7)
+ goto __fail;
+ /* send transfer initialization sequence */
+ memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3);
+ err = snd_i2c_sendbytes(device, initvals2, 4);
+ if (err != 4) {
+ err = err < 0 ? err : -EIO;
+ goto __fail;
+ }
+ /* write default channel status bytes */
+ put_unaligned_le32(SNDRV_PCM_DEFAULT_CON_SPDIF, buf);
+ memset(buf + 4, 0, 24 - 4);
+ if (snd_cs8427_send_corudata(device, 0, buf, 24) < 0)
+ goto __fail;
+ memcpy(chip->playback.def_status, buf, 24);
+ memcpy(chip->playback.pcm_status, buf, 24);
+ snd_i2c_unlock(bus);
+
+ /* turn on run bit and rock'n'roll */
+ snd_cs8427_reset(device);
+
+ return 0;
+
+__fail:
+ snd_i2c_unlock(bus);
+
+ return err;
+}
+EXPORT_SYMBOL(snd_cs8427_init);
+
+int snd_cs8427_create(struct snd_i2c_bus *bus,
+ unsigned char addr,
+ unsigned int reset_timeout,
+ struct snd_i2c_device **r_cs8427)
+{
+ int err;
+ struct cs8427 *chip;
+ struct snd_i2c_device *device;
+
+ err = snd_i2c_device_create(bus, "CS8427", CS8427_ADDR | (addr & 7),
+ &device);
+ if (err < 0)
+ return err;
+ chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (chip == NULL) {
+ snd_i2c_device_free(device);
+ return -ENOMEM;
+ }
+ device->private_free = snd_cs8427_free;
+
+ if (reset_timeout < 1)
+ reset_timeout = 1;
+ chip->reset_timeout = reset_timeout;
+
+ err = snd_cs8427_init(bus, device);
+ if (err)
+ goto __fail;
+
+#if 0 // it's nice for read tests
+ {
+ char buf[128];
+ int xx;
+ buf[0] = 0x81;
+ snd_i2c_sendbytes(device, buf, 1);
+ snd_i2c_readbytes(device, buf, 127);
+ for (xx = 0; xx < 127; xx++)
+ printk(KERN_DEBUG "reg[0x%x] = 0x%x\n", xx+1, buf[xx]);
+ }
+#endif
+
+ if (r_cs8427)
+ *r_cs8427 = device;
+ return 0;
+
+ __fail:
+ snd_i2c_device_free(device);
+ return err < 0 ? err : -EIO;
+}
+
+EXPORT_SYMBOL(snd_cs8427_create);
+
+/*
+ * Reset the chip using run bit, also lock PLL using ILRCK and
+ * put back AES3INPUT. This workaround is described in latest
+ * CS8427 datasheet, otherwise TXDSERIAL will not work.
+ */
+static void snd_cs8427_reset(struct snd_i2c_device *cs8427)
+{
+ struct cs8427 *chip;
+ unsigned long end_time;
+ int data, aes3input = 0;
+
+ if (snd_BUG_ON(!cs8427))
+ return;
+ chip = cs8427->private_data;
+ snd_i2c_lock(cs8427->bus);
+ if ((chip->regmap[CS8427_REG_CLOCKSOURCE] & CS8427_RXDAES3INPUT) ==
+ CS8427_RXDAES3INPUT) /* AES3 bit is set */
+ aes3input = 1;
+ chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK);
+ snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
+ chip->regmap[CS8427_REG_CLOCKSOURCE]);
+ udelay(200);
+ chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RUN | CS8427_RXDILRCK;
+ snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
+ chip->regmap[CS8427_REG_CLOCKSOURCE]);
+ udelay(200);
+ snd_i2c_unlock(cs8427->bus);
+ end_time = jiffies + chip->reset_timeout;
+ while (time_after_eq(end_time, jiffies)) {
+ snd_i2c_lock(cs8427->bus);
+ data = snd_cs8427_reg_read(cs8427, CS8427_REG_RECVERRORS);
+ snd_i2c_unlock(cs8427->bus);
+ if (!(data & CS8427_UNLOCK))
+ break;
+ schedule_timeout_uninterruptible(1);
+ }
+ snd_i2c_lock(cs8427->bus);
+ chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~CS8427_RXDMASK;
+ if (aes3input)
+ chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RXDAES3INPUT;
+ snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
+ chip->regmap[CS8427_REG_CLOCKSOURCE]);
+ snd_i2c_unlock(cs8427->bus);
+}
+
+static int snd_cs8427_in_status_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 = 255;
+ return 0;
+}
+
+static int snd_cs8427_in_status_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
+ int data;
+
+ snd_i2c_lock(device->bus);
+ data = snd_cs8427_reg_read(device, kcontrol->private_value);
+ snd_i2c_unlock(device->bus);
+ if (data < 0)
+ return data;
+ ucontrol->value.integer.value[0] = data;
+ return 0;
+}
+
+static int snd_cs8427_qsubcode_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+ uinfo->count = 10;
+ return 0;
+}
+
+static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
+ unsigned char reg = CS8427_REG_QSUBCODE;
+ int err;
+
+ snd_i2c_lock(device->bus);
+ err = snd_i2c_sendbytes(device, &reg, 1);
+ if (err != 1) {
+ snd_printk(KERN_ERR "unable to send register 0x%x byte "
+ "to CS8427\n", reg);
+ snd_i2c_unlock(device->bus);
+ return err < 0 ? err : -EIO;
+ }
+ err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10);
+ if (err != 10) {
+ snd_printk(KERN_ERR "unable to read Q-subcode bytes "
+ "from CS8427\n");
+ snd_i2c_unlock(device->bus);
+ return err < 0 ? err : -EIO;
+ }
+ snd_i2c_unlock(device->bus);
+ return 0;
+}
+
+static int snd_cs8427_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_cs8427_spdif_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
+ struct cs8427 *chip = device->private_data;
+
+ snd_i2c_lock(device->bus);
+ memcpy(ucontrol->value.iec958.status, chip->playback.def_status, 24);
+ snd_i2c_unlock(device->bus);
+ return 0;
+}
+
+static int snd_cs8427_spdif_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
+ struct cs8427 *chip = device->private_data;
+ unsigned char *status = kcontrol->private_value ?
+ chip->playback.pcm_status : chip->playback.def_status;
+ struct snd_pcm_runtime *runtime = chip->playback.substream ?
+ chip->playback.substream->runtime : NULL;
+ int err, change;
+
+ snd_i2c_lock(device->bus);
+ change = memcmp(ucontrol->value.iec958.status, status, 24) != 0;
+ memcpy(status, ucontrol->value.iec958.status, 24);
+ if (change && (kcontrol->private_value ?
+ runtime != NULL : runtime == NULL)) {
+ err = snd_cs8427_send_corudata(device, 0, status, 24);
+ if (err < 0)
+ change = err;
+ }
+ snd_i2c_unlock(device->bus);
+ return change;
+}
+
+static int snd_cs8427_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_cs8427_spdif_mask_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ memset(ucontrol->value.iec958.status, 0xff, 24);
+ return 0;
+}
+
+static const struct snd_kcontrol_new snd_cs8427_iec958_controls[] = {
+{
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .info = snd_cs8427_in_status_info,
+ .name = "IEC958 CS8427 Input Status",
+ .access = (SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE),
+ .get = snd_cs8427_in_status_get,
+ .private_value = 15,
+},
+{
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .info = snd_cs8427_in_status_info,
+ .name = "IEC958 CS8427 Error Status",
+ .access = (SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE),
+ .get = snd_cs8427_in_status_get,
+ .private_value = 16,
+},
+{
+ .access = SNDRV_CTL_ELEM_ACCESS_READ,
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
+ .info = snd_cs8427_spdif_mask_info,
+ .get = snd_cs8427_spdif_mask_get,
+},
+{
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
+ .info = snd_cs8427_spdif_info,
+ .get = snd_cs8427_spdif_get,
+ .put = snd_cs8427_spdif_put,
+ .private_value = 0
+},
+{
+ .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
+ SNDRV_CTL_ELEM_ACCESS_INACTIVE),
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
+ .info = snd_cs8427_spdif_info,
+ .get = snd_cs8427_spdif_get,
+ .put = snd_cs8427_spdif_put,
+ .private_value = 1
+},
+{
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .info = snd_cs8427_qsubcode_info,
+ .name = "IEC958 Q-subcode Capture Default",
+ .access = (SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE),
+ .get = snd_cs8427_qsubcode_get
+}};
+
+int snd_cs8427_iec958_build(struct snd_i2c_device *cs8427,
+ struct snd_pcm_substream *play_substream,
+ struct snd_pcm_substream *cap_substream)
+{
+ struct cs8427 *chip = cs8427->private_data;
+ struct snd_kcontrol *kctl;
+ unsigned int idx;
+ int err;
+
+ if (snd_BUG_ON(!play_substream || !cap_substream))
+ return -EINVAL;
+ for (idx = 0; idx < ARRAY_SIZE(snd_cs8427_iec958_controls); idx++) {
+ kctl = snd_ctl_new1(&snd_cs8427_iec958_controls[idx], cs8427);
+ if (kctl == NULL)
+ return -ENOMEM;
+ kctl->id.device = play_substream->pcm->device;
+ kctl->id.subdevice = play_substream->number;
+ err = snd_ctl_add(cs8427->bus->card, kctl);
+ if (err < 0)
+ return err;
+ if (! strcmp(kctl->id.name,
+ SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM)))
+ chip->playback.pcm_ctl = kctl;
+ }
+
+ chip->playback.substream = play_substream;
+ chip->capture.substream = cap_substream;
+ if (snd_BUG_ON(!chip->playback.pcm_ctl))
+ return -EIO;
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_cs8427_iec958_build);
+
+int snd_cs8427_iec958_active(struct snd_i2c_device *cs8427, int active)
+{
+ struct cs8427 *chip;
+
+ if (snd_BUG_ON(!cs8427))
+ return -ENXIO;
+ chip = cs8427->private_data;
+ if (active) {
+ memcpy(chip->playback.pcm_status,
+ chip->playback.def_status, 24);
+ chip->playback.pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+ } else {
+ chip->playback.pcm_ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+ }
+ snd_ctl_notify(cs8427->bus->card,
+ SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO,
+ &chip->playback.pcm_ctl->id);
+ return 0;
+}
+
+EXPORT_SYMBOL(snd_cs8427_iec958_active);
+
+int snd_cs8427_iec958_pcm(struct snd_i2c_device *cs8427, unsigned int rate)
+{
+ struct cs8427 *chip;
+ char *status;
+ int err, reset;
+
+ if (snd_BUG_ON(!cs8427))
+ return -ENXIO;
+ chip = cs8427->private_data;
+ status = chip->playback.pcm_status;
+ snd_i2c_lock(cs8427->bus);
+ if (status[0] & IEC958_AES0_PROFESSIONAL) {
+ status[0] &= ~IEC958_AES0_PRO_FS;
+ switch (rate) {
+ case 32000: status[0] |= IEC958_AES0_PRO_FS_32000; break;
+ case 44100: status[0] |= IEC958_AES0_PRO_FS_44100; break;
+ case 48000: status[0] |= IEC958_AES0_PRO_FS_48000; break;
+ default: status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
+ }
+ } else {
+ status[3] &= ~IEC958_AES3_CON_FS;
+ switch (rate) {
+ case 32000: status[3] |= IEC958_AES3_CON_FS_32000; break;
+ case 44100: status[3] |= IEC958_AES3_CON_FS_44100; break;
+ case 48000: status[3] |= IEC958_AES3_CON_FS_48000; break;
+ }
+ }
+ err = snd_cs8427_send_corudata(cs8427, 0, status, 24);
+ if (err > 0)
+ snd_ctl_notify(cs8427->bus->card,
+ SNDRV_CTL_EVENT_MASK_VALUE,
+ &chip->playback.pcm_ctl->id);
+ reset = chip->rate != rate;
+ chip->rate = rate;
+ snd_i2c_unlock(cs8427->bus);
+ if (reset)
+ snd_cs8427_reset(cs8427);
+ return err < 0 ? err : 0;
+}
+
+EXPORT_SYMBOL(snd_cs8427_iec958_pcm);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 17:39:27 +0000