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616 lines
18 KiB
616 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Routines for control of the CS8427 via i2c bus |
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* IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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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 <linux/init.h> |
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#include <linux/bitrev.h> |
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#include <linux/module.h> |
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#include <asm/unaligned.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/cs8427.h> |
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#include <sound/asoundef.h> |
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static void snd_cs8427_reset(struct snd_i2c_device *cs8427); |
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MODULE_AUTHOR("Jaroslav Kysela <[email protected]>"); |
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MODULE_DESCRIPTION("IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic"); |
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MODULE_LICENSE("GPL"); |
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#define CS8427_ADDR (0x20>>1) /* fixed address */ |
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struct cs8427_stream { |
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struct snd_pcm_substream *substream; |
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char hw_status[24]; /* hardware status */ |
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char def_status[24]; /* default status */ |
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char pcm_status[24]; /* PCM private status */ |
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char hw_udata[32]; |
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struct snd_kcontrol *pcm_ctl; |
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}; |
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struct cs8427 { |
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unsigned char regmap[0x14]; /* map of first 1 + 13 registers */ |
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unsigned int rate; |
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unsigned int reset_timeout; |
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struct cs8427_stream playback; |
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struct cs8427_stream capture; |
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}; |
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int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg, |
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unsigned char val) |
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{ |
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int err; |
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unsigned char buf[2]; |
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buf[0] = reg & 0x7f; |
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buf[1] = val; |
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err = snd_i2c_sendbytes(device, buf, 2); |
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if (err != 2) { |
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snd_printk(KERN_ERR "unable to send bytes 0x%02x:0x%02x " |
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"to CS8427 (%i)\n", buf[0], buf[1], err); |
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return err < 0 ? err : -EIO; |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL(snd_cs8427_reg_write); |
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static int snd_cs8427_reg_read(struct snd_i2c_device *device, unsigned char reg) |
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{ |
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int err; |
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unsigned char buf; |
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err = snd_i2c_sendbytes(device, ®, 1); |
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if (err != 1) { |
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snd_printk(KERN_ERR "unable to send register 0x%x byte " |
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"to CS8427\n", reg); |
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return err < 0 ? err : -EIO; |
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} |
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err = snd_i2c_readbytes(device, &buf, 1); |
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if (err != 1) { |
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snd_printk(KERN_ERR "unable to read register 0x%x byte " |
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"from CS8427\n", reg); |
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return err < 0 ? err : -EIO; |
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} |
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return buf; |
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} |
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static int snd_cs8427_select_corudata(struct snd_i2c_device *device, int udata) |
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{ |
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struct cs8427 *chip = device->private_data; |
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int err; |
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udata = udata ? CS8427_BSEL : 0; |
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if (udata != (chip->regmap[CS8427_REG_CSDATABUF] & udata)) { |
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chip->regmap[CS8427_REG_CSDATABUF] &= ~CS8427_BSEL; |
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chip->regmap[CS8427_REG_CSDATABUF] |= udata; |
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err = snd_cs8427_reg_write(device, CS8427_REG_CSDATABUF, |
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chip->regmap[CS8427_REG_CSDATABUF]); |
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if (err < 0) |
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return err; |
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} |
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return 0; |
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} |
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static int snd_cs8427_send_corudata(struct snd_i2c_device *device, |
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int udata, |
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unsigned char *ndata, |
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int count) |
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{ |
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struct cs8427 *chip = device->private_data; |
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char *hw_data = udata ? |
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chip->playback.hw_udata : chip->playback.hw_status; |
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unsigned char data[32]; |
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int err, idx; |
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if (!memcmp(hw_data, ndata, count)) |
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return 0; |
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err = snd_cs8427_select_corudata(device, udata); |
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if (err < 0) |
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return err; |
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memcpy(hw_data, ndata, count); |
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if (udata) { |
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memset(data, 0, sizeof(data)); |
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if (memcmp(hw_data, data, count) == 0) { |
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chip->regmap[CS8427_REG_UDATABUF] &= ~CS8427_UBMMASK; |
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chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS | |
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CS8427_EFTUI; |
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err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF, |
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chip->regmap[CS8427_REG_UDATABUF]); |
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return err < 0 ? err : 0; |
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} |
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} |
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data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF; |
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for (idx = 0; idx < count; idx++) |
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data[idx + 1] = bitrev8(ndata[idx]); |
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if (snd_i2c_sendbytes(device, data, count + 1) != count + 1) |
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return -EIO; |
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return 1; |
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} |
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static void snd_cs8427_free(struct snd_i2c_device *device) |
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{ |
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kfree(device->private_data); |
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} |
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int snd_cs8427_init(struct snd_i2c_bus *bus, |
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struct snd_i2c_device *device) |
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{ |
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static unsigned char initvals1[] = { |
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CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC, |
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/* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes, |
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TCBL=output */ |
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CS8427_SWCLK | CS8427_TCBLDIR, |
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/* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs, |
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normal stereo operation */ |
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0x00, |
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/* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial, |
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Rx=>serial */ |
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CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER, |
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/* CS8427_REG_CLOCKSOURCE: Run off, CMCK=256*Fs, |
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output time base = OMCK, input time base = recovered input clock, |
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recovered input clock source is ILRCK changed to AES3INPUT |
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(workaround, see snd_cs8427_reset) */ |
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CS8427_RXDILRCK, |
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/* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S, |
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24-bit, 64*Fsi */ |
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CS8427_SIDEL | CS8427_SILRPOL, |
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/* CS8427_REG_SERIALOUTPUT: Serial audio output port data format |
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= I2S, 24-bit, 64*Fsi */ |
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CS8427_SODEL | CS8427_SOLRPOL, |
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}; |
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static unsigned char initvals2[] = { |
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CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC, |
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/* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence, |
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biphase, parity status bits */ |
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/* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR,*/ |
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0xff, /* set everything */ |
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/* CS8427_REG_CSDATABUF: |
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Registers 32-55 window to CS buffer |
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Inhibit D->E transfers from overwriting first 5 bytes of CS data. |
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Inhibit D->E transfers (all) of CS data. |
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Allow E->F transfer of CS data. |
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One byte mode; both A/B channels get same written CB data. |
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A channel info is output to chip's EMPH* pin. */ |
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CS8427_CBMR | CS8427_DETCI, |
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/* CS8427_REG_UDATABUF: |
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Use internal buffer to transmit User (U) data. |
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Chip's U pin is an output. |
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Transmit all O's for user data. |
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Inhibit D->E transfers. |
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Inhibit E->F transfers. */ |
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CS8427_UD | CS8427_EFTUI | CS8427_DETUI, |
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}; |
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struct cs8427 *chip = device->private_data; |
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int err; |
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unsigned char buf[24]; |
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snd_i2c_lock(bus); |
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err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER); |
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if (err != CS8427_VER8427A) { |
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/* give second chance */ |
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snd_printk(KERN_WARNING "invalid CS8427 signature 0x%x: " |
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"let me try again...\n", err); |
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err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER); |
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} |
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if (err != CS8427_VER8427A) { |
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snd_i2c_unlock(bus); |
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snd_printk(KERN_ERR "unable to find CS8427 signature " |
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"(expected 0x%x, read 0x%x),\n", |
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CS8427_VER8427A, err); |
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snd_printk(KERN_ERR " initialization is not completed\n"); |
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return -EFAULT; |
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} |
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/* turn off run bit while making changes to configuration */ |
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err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00); |
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if (err < 0) |
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goto __fail; |
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/* send initial values */ |
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memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6); |
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err = snd_i2c_sendbytes(device, initvals1, 7); |
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if (err != 7) { |
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err = err < 0 ? err : -EIO; |
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goto __fail; |
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} |
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/* Turn off CS8427 interrupt stuff that is not used in hardware */ |
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memset(buf, 0, 7); |
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/* from address 9 to 15 */ |
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buf[0] = 9; /* register */ |
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err = snd_i2c_sendbytes(device, buf, 7); |
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if (err != 7) |
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goto __fail; |
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/* send transfer initialization sequence */ |
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memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3); |
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err = snd_i2c_sendbytes(device, initvals2, 4); |
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if (err != 4) { |
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err = err < 0 ? err : -EIO; |
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goto __fail; |
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} |
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/* write default channel status bytes */ |
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put_unaligned_le32(SNDRV_PCM_DEFAULT_CON_SPDIF, buf); |
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memset(buf + 4, 0, 24 - 4); |
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if (snd_cs8427_send_corudata(device, 0, buf, 24) < 0) |
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goto __fail; |
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memcpy(chip->playback.def_status, buf, 24); |
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memcpy(chip->playback.pcm_status, buf, 24); |
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snd_i2c_unlock(bus); |
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/* turn on run bit and rock'n'roll */ |
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snd_cs8427_reset(device); |
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return 0; |
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__fail: |
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snd_i2c_unlock(bus); |
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return err; |
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} |
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EXPORT_SYMBOL(snd_cs8427_init); |
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int snd_cs8427_create(struct snd_i2c_bus *bus, |
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unsigned char addr, |
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unsigned int reset_timeout, |
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struct snd_i2c_device **r_cs8427) |
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{ |
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int err; |
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struct cs8427 *chip; |
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struct snd_i2c_device *device; |
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err = snd_i2c_device_create(bus, "CS8427", CS8427_ADDR | (addr & 7), |
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&device); |
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if (err < 0) |
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return err; |
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chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL); |
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if (chip == NULL) { |
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snd_i2c_device_free(device); |
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return -ENOMEM; |
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} |
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device->private_free = snd_cs8427_free; |
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if (reset_timeout < 1) |
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reset_timeout = 1; |
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chip->reset_timeout = reset_timeout; |
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err = snd_cs8427_init(bus, device); |
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if (err) |
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goto __fail; |
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#if 0 // it's nice for read tests |
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{ |
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char buf[128]; |
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int xx; |
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buf[0] = 0x81; |
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snd_i2c_sendbytes(device, buf, 1); |
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snd_i2c_readbytes(device, buf, 127); |
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for (xx = 0; xx < 127; xx++) |
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printk(KERN_DEBUG "reg[0x%x] = 0x%x\n", xx+1, buf[xx]); |
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} |
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#endif |
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if (r_cs8427) |
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*r_cs8427 = device; |
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return 0; |
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__fail: |
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snd_i2c_device_free(device); |
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return err < 0 ? err : -EIO; |
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} |
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EXPORT_SYMBOL(snd_cs8427_create); |
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/* |
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* Reset the chip using run bit, also lock PLL using ILRCK and |
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* put back AES3INPUT. This workaround is described in latest |
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* CS8427 datasheet, otherwise TXDSERIAL will not work. |
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*/ |
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static void snd_cs8427_reset(struct snd_i2c_device *cs8427) |
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{ |
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struct cs8427 *chip; |
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unsigned long end_time; |
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int data, aes3input = 0; |
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if (snd_BUG_ON(!cs8427)) |
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return; |
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chip = cs8427->private_data; |
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snd_i2c_lock(cs8427->bus); |
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if ((chip->regmap[CS8427_REG_CLOCKSOURCE] & CS8427_RXDAES3INPUT) == |
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CS8427_RXDAES3INPUT) /* AES3 bit is set */ |
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aes3input = 1; |
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chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK); |
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snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, |
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chip->regmap[CS8427_REG_CLOCKSOURCE]); |
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udelay(200); |
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chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RUN | CS8427_RXDILRCK; |
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snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, |
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chip->regmap[CS8427_REG_CLOCKSOURCE]); |
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udelay(200); |
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snd_i2c_unlock(cs8427->bus); |
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end_time = jiffies + chip->reset_timeout; |
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while (time_after_eq(end_time, jiffies)) { |
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snd_i2c_lock(cs8427->bus); |
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data = snd_cs8427_reg_read(cs8427, CS8427_REG_RECVERRORS); |
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snd_i2c_unlock(cs8427->bus); |
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if (!(data & CS8427_UNLOCK)) |
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break; |
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schedule_timeout_uninterruptible(1); |
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} |
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snd_i2c_lock(cs8427->bus); |
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chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~CS8427_RXDMASK; |
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if (aes3input) |
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chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RXDAES3INPUT; |
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snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, |
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chip->regmap[CS8427_REG_CLOCKSOURCE]); |
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snd_i2c_unlock(cs8427->bus); |
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} |
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static int snd_cs8427_in_status_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 = 255; |
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return 0; |
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} |
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static int snd_cs8427_in_status_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); |
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int data; |
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snd_i2c_lock(device->bus); |
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data = snd_cs8427_reg_read(device, kcontrol->private_value); |
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snd_i2c_unlock(device->bus); |
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if (data < 0) |
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return data; |
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ucontrol->value.integer.value[0] = data; |
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return 0; |
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} |
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static int snd_cs8427_qsubcode_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_BYTES; |
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uinfo->count = 10; |
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return 0; |
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} |
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static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); |
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unsigned char reg = CS8427_REG_QSUBCODE; |
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int err; |
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snd_i2c_lock(device->bus); |
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err = snd_i2c_sendbytes(device, ®, 1); |
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if (err != 1) { |
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snd_printk(KERN_ERR "unable to send register 0x%x byte " |
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"to CS8427\n", reg); |
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snd_i2c_unlock(device->bus); |
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return err < 0 ? err : -EIO; |
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} |
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err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10); |
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if (err != 10) { |
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snd_printk(KERN_ERR "unable to read Q-subcode bytes " |
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"from CS8427\n"); |
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snd_i2c_unlock(device->bus); |
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return err < 0 ? err : -EIO; |
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} |
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snd_i2c_unlock(device->bus); |
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return 0; |
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} |
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static int snd_cs8427_spdif_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_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_cs8427_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 snd_i2c_device *device = snd_kcontrol_chip(kcontrol); |
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struct cs8427 *chip = device->private_data; |
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snd_i2c_lock(device->bus); |
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memcpy(ucontrol->value.iec958.status, chip->playback.def_status, 24); |
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snd_i2c_unlock(device->bus); |
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return 0; |
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} |
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static int snd_cs8427_spdif_put(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol); |
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struct cs8427 *chip = device->private_data; |
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unsigned char *status = kcontrol->private_value ? |
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chip->playback.pcm_status : chip->playback.def_status; |
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struct snd_pcm_runtime *runtime = chip->playback.substream ? |
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chip->playback.substream->runtime : NULL; |
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int err, change; |
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snd_i2c_lock(device->bus); |
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change = memcmp(ucontrol->value.iec958.status, status, 24) != 0; |
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memcpy(status, ucontrol->value.iec958.status, 24); |
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if (change && (kcontrol->private_value ? |
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runtime != NULL : runtime == NULL)) { |
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err = snd_cs8427_send_corudata(device, 0, status, 24); |
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if (err < 0) |
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change = err; |
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} |
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snd_i2c_unlock(device->bus); |
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return change; |
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} |
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static int snd_cs8427_spdif_mask_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_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_cs8427_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, 24); |
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return 0; |
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} |
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static const struct snd_kcontrol_new snd_cs8427_iec958_controls[] = { |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.info = snd_cs8427_in_status_info, |
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.name = "IEC958 CS8427 Input Status", |
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.access = (SNDRV_CTL_ELEM_ACCESS_READ | |
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SNDRV_CTL_ELEM_ACCESS_VOLATILE), |
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.get = snd_cs8427_in_status_get, |
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.private_value = 15, |
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}, |
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{ |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.info = snd_cs8427_in_status_info, |
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.name = "IEC958 CS8427 Error Status", |
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.access = (SNDRV_CTL_ELEM_ACCESS_READ | |
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SNDRV_CTL_ELEM_ACCESS_VOLATILE), |
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.get = snd_cs8427_in_status_get, |
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.private_value = 16, |
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}, |
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{ |
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.access = SNDRV_CTL_ELEM_ACCESS_READ, |
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.iface = SNDRV_CTL_ELEM_IFACE_PCM, |
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.name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK), |
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.info = snd_cs8427_spdif_mask_info, |
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.get = snd_cs8427_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("",PLAYBACK,DEFAULT), |
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.info = snd_cs8427_spdif_info, |
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.get = snd_cs8427_spdif_get, |
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.put = snd_cs8427_spdif_put, |
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.private_value = 0 |
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}, |
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{ |
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.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; |
|
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);
|
|
|