// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for DBRI sound chip found on Sparcs .
* Copyright ( C ) 2004 , 2005 Martin Habets ( mhabets @ users . sourceforge . net )
*
* Converted to ring buffered version by Krzysztof Helt ( krzysztof . h1 @ wp . pl )
*
* Based entirely upon drivers / sbus / audio / dbri . c which is :
* Copyright ( C ) 1997 Rudolf Koenig ( rfkoenig @ immd4 . informatik . uni - erlangen . de )
* Copyright ( C ) 1998 , 1999 Brent Baccala ( baccala @ freesoft . org )
*
* This is the low level driver for the DBRI & MMCODEC duo used for ISDN & AUDIO
* on Sun SPARCStation 10 , 20 , LX and Voyager models .
*
* - DBRI : AT & T T5900FX Dual Basic Rates ISDN Interface . It is a 32 channel
* data time multiplexer with ISDN support ( aka T7259 )
* Interfaces : SBus , ISDN NT & TE , CHI , 4 bits parallel .
* CHI : ( spelled ki ) Concentration Highway Interface ( AT & T or Intel bus ? ) .
* Documentation :
* - " STP 4000 SBus Dual Basic Rate ISDN ( DBRI ) Transceiver " from
* Sparc Technology Business ( courtesy of Sun Support )
* - Data sheet of the T7903 , a newer but very similar ISA bus equivalent
* available from the Lucent ( formerly AT & T microelectronics ) home
* page .
* - https : //www.freesoft.org/Linux/DBRI/
* - MMCODEC : Crystal Semiconductor CS4215 16 bit Multimedia Audio Codec
* Interfaces : CHI , Audio In & Out , 2 bits parallel
* Documentation : from the Crystal Semiconductor home page .
*
* The DBRI is a 32 pipe machine , each pipe can transfer some bits between
* memory and a serial device ( long pipes , no . 0 - 15 ) or between two serial
* devices ( short pipes , no . 16 - 31 ) , or simply send a fixed data to a serial
* device ( short pipes ) .
* A timeslot defines the bit - offset and no . of bits read from a serial device .
* The timeslots are linked to 6 circular lists , one for each direction for
* each serial device ( NT , TE , CHI ) . A timeslot is associated to 1 or 2 pipes
* ( the second one is a monitor / tee pipe , valid only for serial input ) .
*
* The mmcodec is connected via the CHI bus and needs the data & some
* parameters ( volume , output selection ) time multiplexed in 8 byte
* chunks . It also has a control mode , which serves for audio format setting .
*
* Looking at the CS4215 data sheet it is easy to set up 2 or 4 codecs on
* the same CHI bus , so I thought perhaps it is possible to use the on - board
* & the speakerbox codec simultaneously , giving 2 ( not very independent : - )
* audio devices . But the SUN HW group decided against it , at least on my
* LX the speakerbox connector has at least 1 pin missing and 1 wrongly
* connected .
*
* I ' ve tried to stick to the following function naming conventions :
* snd_ * ALSA stuff
* cs4215_ * CS4215 codec specific stuff
* dbri_ * DBRI high - level stuff
* other DBRI low - level stuff
*/
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/gfp.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/info.h>
#include <sound/control.h>
#include <sound/initval.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/atomic.h>
#include <linux/module.h>
MODULE_AUTHOR("Rudolf Koenig, Brent Baccala and Martin Habets" );
MODULE_DESCRIPTION("Sun DBRI" );
MODULE_LICENSE("GPL" );
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
/* Enable this card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
module_param_array(index, int , NULL, 0444 );
MODULE_PARM_DESC(index, "Index value for Sun DBRI soundcard." );
module_param_array(id, charp, NULL, 0444 );
MODULE_PARM_DESC(id, "ID string for Sun DBRI soundcard." );
module_param_array(enable, bool , NULL, 0444 );
MODULE_PARM_DESC(enable, "Enable Sun DBRI soundcard." );
#undef DBRI_DEBUG
#define D_INT (1 <<0 )
#define D_GEN (1 <<1 )
#define D_CMD (1 <<2 )
#define D_MM (1 <<3 )
#define D_USR (1 <<4 )
#define D_DESC (1 <<5 )
static int dbri_debug;
module_param(dbri_debug, int , 0644 );
MODULE_PARM_DESC(dbri_debug, "Debug value for Sun DBRI soundcard." );
#ifdef DBRI_DEBUG
static const char * const cmds[] = {
"WAIT" , "PAUSE" , "JUMP" , "IIQ" , "REX" , "SDP" , "CDP" , "DTS" ,
"SSP" , "CHI" , "NT" , "TE" , "CDEC" , "TEST" , "CDM" , "RESRV"
};
#define dprintk(a, x...) if (dbri_debug & a) printk(KERN_DEBUG x)
#else
#define dprintk(a, x...) do { } while (0 )
#endif /* DBRI_DEBUG */
#define DBRI_CMD(cmd, intr, value) ((cmd << 28 ) | \
(intr << 27 ) | \
value)
/***************************************************************************
CS4215 specific definitions and structures
****************************************************************************/
struct cs4215 {
__u8 data[4 ]; /* Data mode: Time slots 5-8 */
__u8 ctrl[4 ]; /* Ctrl mode: Time slots 1-4 */
__u8 onboard;
__u8 offset; /* Bit offset from frame sync to time slot 1 */
volatile __u32 status;
volatile __u32 version;
__u8 precision; /* In bits, either 8 or 16 */
__u8 channels; /* 1 or 2 */
};
/*
* Control mode first
*/
/* Time Slot 1, Status register */
#define CS4215_CLB (1 <<2 ) /* Control Latch Bit */
#define CS4215_OLB (1 <<3 ) /* 1: line: 2.0V, speaker 4V */
/* 0: line: 2.8V, speaker 8V */
#define CS4215_MLB (1 <<4 ) /* 1: Microphone: 20dB gain disabled */
#define CS4215_RSRVD_1 (1 <<5 )
/* Time Slot 2, Data Format Register */
#define CS4215_DFR_LINEAR16 0
#define CS4215_DFR_ULAW 1
#define CS4215_DFR_ALAW 2
#define CS4215_DFR_LINEAR8 3
#define CS4215_DFR_STEREO (1 <<2 )
static struct {
unsigned short freq;
unsigned char xtal;
unsigned char csval;
} CS4215_FREQ[] = {
{ 8000 , (1 << 4 ), (0 << 3 ) },
{ 16000 , (1 << 4 ), (1 << 3 ) },
{ 27429 , (1 << 4 ), (2 << 3 ) }, /* Actually 24428.57 */
{ 32000 , (1 << 4 ), (3 << 3 ) },
/* { NA, (1 << 4), (4 << 3) }, */
/* { NA, (1 << 4), (5 << 3) }, */
{ 48000 , (1 << 4 ), (6 << 3 ) },
{ 9600 , (1 << 4 ), (7 << 3 ) },
{ 5512 , (2 << 4 ), (0 << 3 ) }, /* Actually 5512.5 */
{ 11025 , (2 << 4 ), (1 << 3 ) },
{ 18900 , (2 << 4 ), (2 << 3 ) },
{ 22050 , (2 << 4 ), (3 << 3 ) },
{ 37800 , (2 << 4 ), (4 << 3 ) },
{ 44100 , (2 << 4 ), (5 << 3 ) },
{ 33075 , (2 << 4 ), (6 << 3 ) },
{ 6615 , (2 << 4 ), (7 << 3 ) },
{ 0 , 0 , 0 }
};
#define CS4215_HPF (1 <<7 ) /* High Pass Filter, 1: Enabled */
#define CS4215_12_MASK 0 xfcbf /* Mask off reserved bits in slot 1 & 2 */
/* Time Slot 3, Serial Port Control register */
#define CS4215_XEN (1 <<0 ) /* 0: Enable serial output */
#define CS4215_XCLK (1 <<1 ) /* 1: Master mode: Generate SCLK */
#define CS4215_BSEL_64 (0 <<2 ) /* Bitrate: 64 bits per frame */
#define CS4215_BSEL_128 (1 <<2 )
#define CS4215_BSEL_256 (2 <<2 )
#define CS4215_MCK_MAST (0 <<4 ) /* Master clock */
#define CS4215_MCK_XTL1 (1 <<4 ) /* 24.576 MHz clock source */
#define CS4215_MCK_XTL2 (2 <<4 ) /* 16.9344 MHz clock source */
#define CS4215_MCK_CLK1 (3 <<4 ) /* Clockin, 256 x Fs */
#define CS4215_MCK_CLK2 (4 <<4 ) /* Clockin, see DFR */
/* Time Slot 4, Test Register */
#define CS4215_DAD (1 <<0 ) /* 0:Digital-Dig loop, 1:Dig-Analog-Dig loop */
#define CS4215_ENL (1 <<1 ) /* Enable Loopback Testing */
/* Time Slot 5, Parallel Port Register */
/* Read only here and the same as the in data mode */
/* Time Slot 6, Reserved */
/* Time Slot 7, Version Register */
#define CS4215_VERSION_MASK 0 xf /* Known versions 0/C, 1/D, 2/E */
/* Time Slot 8, Reserved */
/*
* Data mode
*/
/* Time Slot 1-2: Left Channel Data, 2-3: Right Channel Data */
/* Time Slot 5, Output Setting */
#define CS4215_LO(v) v /* Left Output Attenuation 0x3f: -94.5 dB */
#define CS4215_LE (1 <<6 ) /* Line Out Enable */
#define CS4215_HE (1 <<7 ) /* Headphone Enable */
/* Time Slot 6, Output Setting */
#define CS4215_RO(v) v /* Right Output Attenuation 0x3f: -94.5 dB */
#define CS4215_SE (1 <<6 ) /* Speaker Enable */
#define CS4215_ADI (1 <<7 ) /* A/D Data Invalid: Busy in calibration */
/* Time Slot 7, Input Setting */
#define CS4215_LG(v) v /* Left Gain Setting 0xf: 22.5 dB */
#define CS4215_IS (1 <<4 ) /* Input Select: 1=Microphone, 0=Line */
#define CS4215_OVR (1 <<5 ) /* 1: Over range condition occurred */
#define CS4215_PIO0 (1 <<6 ) /* Parallel I/O 0 */
#define CS4215_PIO1 (1 <<7 )
/* Time Slot 8, Input Setting */
#define CS4215_RG(v) v /* Right Gain Setting 0xf: 22.5 dB */
#define CS4215_MA(v) (v<<4 ) /* Monitor Path Attenuation 0xf: mute */
/***************************************************************************
DBRI specific definitions and structures
****************************************************************************/
/* DBRI main registers */
#define REG0 0 x00 /* Status and Control */
#define REG1 0 x04 /* Mode and Interrupt */
#define REG2 0 x08 /* Parallel IO */
#define REG3 0 x0c /* Test */
#define REG8 0 x20 /* Command Queue Pointer */
#define REG9 0 x24 /* Interrupt Queue Pointer */
#define DBRI_NO_CMDS 64
#define DBRI_INT_BLK 64
#define DBRI_NO_DESCS 64
#define DBRI_NO_PIPES 32
#define DBRI_MAX_PIPE (DBRI_NO_PIPES - 1 )
#define DBRI_REC 0
#define DBRI_PLAY 1
#define DBRI_NO_STREAMS 2
/* One transmit/receive descriptor */
/* When ba != 0 descriptor is used */
struct dbri_mem {
volatile __u32 word1;
__u32 ba; /* Transmit/Receive Buffer Address */
__u32 nda; /* Next Descriptor Address */
volatile __u32 word4;
};
/* This structure is in a DMA region where it can accessed by both
* the CPU and the DBRI
*/
struct dbri_dma {
s32 cmd[DBRI_NO_CMDS]; /* Place for commands */
volatile s32 intr[DBRI_INT_BLK]; /* Interrupt field */
struct dbri_mem desc[DBRI_NO_DESCS]; /* Xmit/receive descriptors */
};
#define dbri_dma_off(member, elem) \
((u32)(unsigned long ) \
(&(((struct dbri_dma *)0 )->member[elem])))
enum in_or_out { PIPEinput, PIPEoutput };
struct dbri_pipe {
u32 sdp; /* SDP command word */
int nextpipe; /* Next pipe in linked list */
int length; /* Length of timeslot (bits) */
int first_desc; /* Index of first descriptor */
int desc; /* Index of active descriptor */
volatile __u32 *recv_fixed_ptr; /* Ptr to receive fixed data */
};
/* Per stream (playback or record) information */
struct dbri_streaminfo {
struct snd_pcm_substream *substream;
u32 dvma_buffer; /* Device view of ALSA DMA buffer */
int size; /* Size of DMA buffer */
size_t offset; /* offset in user buffer */
int pipe; /* Data pipe used */
int left_gain; /* mixer elements */
int right_gain;
};
/* This structure holds the information for both chips (DBRI & CS4215) */
struct snd_dbri {
int regs_size, irq; /* Needed for unload */
struct platform_device *op; /* OF device info */
spinlock_t lock;
struct dbri_dma *dma; /* Pointer to our DMA block */
dma_addr_t dma_dvma; /* DBRI visible DMA address */
void __iomem *regs; /* dbri HW regs */
int dbri_irqp; /* intr queue pointer */
struct dbri_pipe pipes[DBRI_NO_PIPES]; /* DBRI's 32 data pipes */
int next_desc[DBRI_NO_DESCS]; /* Index of next desc, or -1 */
spinlock_t cmdlock; /* Protects cmd queue accesses */
s32 *cmdptr; /* Pointer to the last queued cmd */
int chi_bpf;
struct cs4215 mm; /* mmcodec special info */
/* per stream (playback/record) info */
struct dbri_streaminfo stream_info[DBRI_NO_STREAMS];
};
#define DBRI_MAX_VOLUME 63 /* Output volume */
#define DBRI_MAX_GAIN 15 /* Input gain */
/* DBRI Reg0 - Status Control Register - defines. (Page 17) */
#define D_P (1 <<15 ) /* Program command & queue pointer valid */
#define D_G (1 <<14 ) /* Allow 4-Word SBus Burst */
#define D_S (1 <<13 ) /* Allow 16-Word SBus Burst */
#define D_E (1 <<12 ) /* Allow 8-Word SBus Burst */
#define D_X (1 <<7 ) /* Sanity Timer Disable */
#define D_T (1 <<6 ) /* Permit activation of the TE interface */
#define D_N (1 <<5 ) /* Permit activation of the NT interface */
#define D_C (1 <<4 ) /* Permit activation of the CHI interface */
#define D_F (1 <<3 ) /* Force Sanity Timer Time-Out */
#define D_D (1 <<2 ) /* Disable Master Mode */
#define D_H (1 <<1 ) /* Halt for Analysis */
#define D_R (1 <<0 ) /* Soft Reset */
/* DBRI Reg1 - Mode and Interrupt Register - defines. (Page 18) */
#define D_LITTLE_END (1 <<8 ) /* Byte Order */
#define D_BIG_END (0 <<8 ) /* Byte Order */
#define D_MRR (1 <<4 ) /* Multiple Error Ack on SBus (read only) */
#define D_MLE (1 <<3 ) /* Multiple Late Error on SBus (read only) */
#define D_LBG (1 <<2 ) /* Lost Bus Grant on SBus (read only) */
#define D_MBE (1 <<1 ) /* Burst Error on SBus (read only) */
#define D_IR (1 <<0 ) /* Interrupt Indicator (read only) */
/* DBRI Reg2 - Parallel IO Register - defines. (Page 18) */
#define D_ENPIO3 (1 <<7 ) /* Enable Pin 3 */
#define D_ENPIO2 (1 <<6 ) /* Enable Pin 2 */
#define D_ENPIO1 (1 <<5 ) /* Enable Pin 1 */
#define D_ENPIO0 (1 <<4 ) /* Enable Pin 0 */
#define D_ENPIO (0 xf0) /* Enable all the pins */
#define D_PIO3 (1 <<3 ) /* Pin 3: 1: Data mode, 0: Ctrl mode */
#define D_PIO2 (1 <<2 ) /* Pin 2: 1: Onboard PDN */
#define D_PIO1 (1 <<1 ) /* Pin 1: 0: Reset */
#define D_PIO0 (1 <<0 ) /* Pin 0: 1: Speakerbox PDN */
/* DBRI Commands (Page 20) */
#define D_WAIT 0 x0 /* Stop execution */
#define D_PAUSE 0 x1 /* Flush long pipes */
#define D_JUMP 0 x2 /* New command queue */
#define D_IIQ 0 x3 /* Initialize Interrupt Queue */
#define D_REX 0 x4 /* Report command execution via interrupt */
#define D_SDP 0 x5 /* Setup Data Pipe */
#define D_CDP 0 x6 /* Continue Data Pipe (reread NULL Pointer) */
#define D_DTS 0 x7 /* Define Time Slot */
#define D_SSP 0 x8 /* Set short Data Pipe */
#define D_CHI 0 x9 /* Set CHI Global Mode */
#define D_NT 0 xa /* NT Command */
#define D_TE 0 xb /* TE Command */
#define D_CDEC 0 xc /* Codec setup */
#define D_TEST 0 xd /* No comment */
#define D_CDM 0 xe /* CHI Data mode command */
/* Special bits for some commands */
#define D_PIPE(v) ((v)<<0 ) /* Pipe No.: 0-15 long, 16-21 short */
/* Setup Data Pipe */
/* IRM */
#define D_SDP_2SAME (1 <<18 ) /* Report 2nd time in a row value received */
#define D_SDP_CHANGE (2 <<18 ) /* Report any changes */
#define D_SDP_EVERY (3 <<18 ) /* Report any changes */
#define D_SDP_EOL (1 <<17 ) /* EOL interrupt enable */
#define D_SDP_IDLE (1 <<16 ) /* HDLC idle interrupt enable */
/* Pipe data MODE */
#define D_SDP_MEM (0 <<13 ) /* To/from memory */
#define D_SDP_HDLC (2 <<13 )
#define D_SDP_HDLC_D (3 <<13 ) /* D Channel (prio control) */
#define D_SDP_SER (4 <<13 ) /* Serial to serial */
#define D_SDP_FIXED (6 <<13 ) /* Short only */
#define D_SDP_MODE(v) ((v)&(7 <<13 ))
#define D_SDP_TO_SER (1 <<12 ) /* Direction */
#define D_SDP_FROM_SER (0 <<12 ) /* Direction */
#define D_SDP_MSB (1 <<11 ) /* Bit order within Byte */
#define D_SDP_LSB (0 <<11 ) /* Bit order within Byte */
#define D_SDP_P (1 <<10 ) /* Pointer Valid */
#define D_SDP_A (1 <<8 ) /* Abort */
#define D_SDP_C (1 <<7 ) /* Clear */
/* Define Time Slot */
#define D_DTS_VI (1 <<17 ) /* Valid Input Time-Slot Descriptor */
#define D_DTS_VO (1 <<16 ) /* Valid Output Time-Slot Descriptor */
#define D_DTS_INS (1 <<15 ) /* Insert Time Slot */
#define D_DTS_DEL (0 <<15 ) /* Delete Time Slot */
#define D_DTS_PRVIN(v) ((v)<<10 ) /* Previous In Pipe */
#define D_DTS_PRVOUT(v) ((v)<<5 ) /* Previous Out Pipe */
/* Time Slot defines */
#define D_TS_LEN(v) ((v)<<24 ) /* Number of bits in this time slot */
#define D_TS_CYCLE(v) ((v)<<14 ) /* Bit Count at start of TS */
#define D_TS_DI (1 <<13 ) /* Data Invert */
#define D_TS_1CHANNEL (0 <<10 ) /* Single Channel / Normal mode */
#define D_TS_MONITOR (2 <<10 ) /* Monitor pipe */
#define D_TS_NONCONTIG (3 <<10 ) /* Non contiguous mode */
#define D_TS_ANCHOR (7 <<10 ) /* Starting short pipes */
#define D_TS_MON(v) ((v)<<5 ) /* Monitor Pipe */
#define D_TS_NEXT(v) ((v)<<0 ) /* Pipe no.: 0-15 long, 16-21 short */
/* Concentration Highway Interface Modes */
#define D_CHI_CHICM(v) ((v)<<16 ) /* Clock mode */
#define D_CHI_IR (1 <<15 ) /* Immediate Interrupt Report */
#define D_CHI_EN (1 <<14 ) /* CHIL Interrupt enabled */
#define D_CHI_OD (1 <<13 ) /* Open Drain Enable */
#define D_CHI_FE (1 <<12 ) /* Sample CHIFS on Rising Frame Edge */
#define D_CHI_FD (1 <<11 ) /* Frame Drive */
#define D_CHI_BPF(v) ((v)<<0 ) /* Bits per Frame */
/* NT: These are here for completeness */
#define D_NT_FBIT (1 <<17 ) /* Frame Bit */
#define D_NT_NBF (1 <<16 ) /* Number of bad frames to loose framing */
#define D_NT_IRM_IMM (1 <<15 ) /* Interrupt Report & Mask: Immediate */
#define D_NT_IRM_EN (1 <<14 ) /* Interrupt Report & Mask: Enable */
#define D_NT_ISNT (1 <<13 ) /* Configure interface as NT */
#define D_NT_FT (1 <<12 ) /* Fixed Timing */
#define D_NT_EZ (1 <<11 ) /* Echo Channel is Zeros */
#define D_NT_IFA (1 <<10 ) /* Inhibit Final Activation */
#define D_NT_ACT (1 <<9 ) /* Activate Interface */
#define D_NT_MFE (1 <<8 ) /* Multiframe Enable */
#define D_NT_RLB(v) ((v)<<5 ) /* Remote Loopback */
#define D_NT_LLB(v) ((v)<<2 ) /* Local Loopback */
#define D_NT_FACT (1 <<1 ) /* Force Activation */
#define D_NT_ABV (1 <<0 ) /* Activate Bipolar Violation */
/* Codec Setup */
#define D_CDEC_CK(v) ((v)<<24 ) /* Clock Select */
#define D_CDEC_FED(v) ((v)<<12 ) /* FSCOD Falling Edge Delay */
#define D_CDEC_RED(v) ((v)<<0 ) /* FSCOD Rising Edge Delay */
/* Test */
#define D_TEST_RAM(v) ((v)<<16 ) /* RAM Pointer */
#define D_TEST_SIZE(v) ((v)<<11 ) /* */
#define D_TEST_ROMONOFF 0 x5 /* Toggle ROM opcode monitor on/off */
#define D_TEST_PROC 0 x6 /* Microprocessor test */
#define D_TEST_SER 0 x7 /* Serial-Controller test */
#define D_TEST_RAMREAD 0 x8 /* Copy from Ram to system memory */
#define D_TEST_RAMWRITE 0 x9 /* Copy into Ram from system memory */
#define D_TEST_RAMBIST 0 xa /* RAM Built-In Self Test */
#define D_TEST_MCBIST 0 xb /* Microcontroller Built-In Self Test */
#define D_TEST_DUMP 0 xe /* ROM Dump */
/* CHI Data Mode */
#define D_CDM_THI (1 << 8 ) /* Transmit Data on CHIDR Pin */
#define D_CDM_RHI (1 << 7 ) /* Receive Data on CHIDX Pin */
#define D_CDM_RCE (1 << 6 ) /* Receive on Rising Edge of CHICK */
#define D_CDM_XCE (1 << 2 ) /* Transmit Data on Rising Edge of CHICK */
#define D_CDM_XEN (1 << 1 ) /* Transmit Highway Enable */
#define D_CDM_REN (1 << 0 ) /* Receive Highway Enable */
/* The Interrupts */
#define D_INTR_BRDY 1 /* Buffer Ready for processing */
#define D_INTR_MINT 2 /* Marked Interrupt in RD/TD */
#define D_INTR_IBEG 3 /* Flag to idle transition detected (HDLC) */
#define D_INTR_IEND 4 /* Idle to flag transition detected (HDLC) */
#define D_INTR_EOL 5 /* End of List */
#define D_INTR_CMDI 6 /* Command has bean read */
#define D_INTR_XCMP 8 /* Transmission of frame complete */
#define D_INTR_SBRI 9 /* BRI status change info */
#define D_INTR_FXDT 10 /* Fixed data change */
#define D_INTR_CHIL 11 /* CHI lost frame sync (channel 36 only) */
#define D_INTR_COLL 11 /* Unrecoverable D-Channel collision */
#define D_INTR_DBYT 12 /* Dropped by frame slip */
#define D_INTR_RBYT 13 /* Repeated by frame slip */
#define D_INTR_LINT 14 /* Lost Interrupt */
#define D_INTR_UNDR 15 /* DMA underrun */
#define D_INTR_TE 32
#define D_INTR_NT 34
#define D_INTR_CHI 36
#define D_INTR_CMD 38
#define D_INTR_GETCHAN(v) (((v) >> 24 ) & 0 x3f)
#define D_INTR_GETCODE(v) (((v) >> 20 ) & 0 xf)
#define D_INTR_GETCMD(v) (((v) >> 16 ) & 0 xf)
#define D_INTR_GETVAL(v) ((v) & 0 xffff)
#define D_INTR_GETRVAL(v) ((v) & 0 xfffff)
#define D_P_0 0 /* TE receive anchor */
#define D_P_1 1 /* TE transmit anchor */
#define D_P_2 2 /* NT transmit anchor */
#define D_P_3 3 /* NT receive anchor */
#define D_P_4 4 /* CHI send data */
#define D_P_5 5 /* CHI receive data */
#define D_P_6 6 /* */
#define D_P_7 7 /* */
#define D_P_8 8 /* */
#define D_P_9 9 /* */
#define D_P_10 10 /* */
#define D_P_11 11 /* */
#define D_P_12 12 /* */
#define D_P_13 13 /* */
#define D_P_14 14 /* */
#define D_P_15 15 /* */
#define D_P_16 16 /* CHI anchor pipe */
#define D_P_17 17 /* CHI send */
#define D_P_18 18 /* CHI receive */
#define D_P_19 19 /* CHI receive */
#define D_P_20 20 /* CHI receive */
#define D_P_21 21 /* */
#define D_P_22 22 /* */
#define D_P_23 23 /* */
#define D_P_24 24 /* */
#define D_P_25 25 /* */
#define D_P_26 26 /* */
#define D_P_27 27 /* */
#define D_P_28 28 /* */
#define D_P_29 29 /* */
#define D_P_30 30 /* */
#define D_P_31 31 /* */
/* Transmit descriptor defines */
#define DBRI_TD_F (1 << 31 ) /* End of Frame */
#define DBRI_TD_D (1 << 30 ) /* Do not append CRC */
#define DBRI_TD_CNT(v) ((v) << 16 ) /* Number of valid bytes in the buffer */
#define DBRI_TD_B (1 << 15 ) /* Final interrupt */
#define DBRI_TD_M (1 << 14 ) /* Marker interrupt */
#define DBRI_TD_I (1 << 13 ) /* Transmit Idle Characters */
#define DBRI_TD_FCNT(v) (v) /* Flag Count */
#define DBRI_TD_UNR (1 << 3 ) /* Underrun: transmitter is out of data */
#define DBRI_TD_ABT (1 << 2 ) /* Abort: frame aborted */
#define DBRI_TD_TBC (1 << 0 ) /* Transmit buffer Complete */
#define DBRI_TD_STATUS(v) ((v) & 0 xff) /* Transmit status */
/* Maximum buffer size per TD: almost 8KB */
#define DBRI_TD_MAXCNT ((1 << 13 ) - 4 )
/* Receive descriptor defines */
#define DBRI_RD_F (1 << 31 ) /* End of Frame */
#define DBRI_RD_C (1 << 30 ) /* Completed buffer */
#define DBRI_RD_B (1 << 15 ) /* Final interrupt */
#define DBRI_RD_M (1 << 14 ) /* Marker interrupt */
#define DBRI_RD_BCNT(v) (v) /* Buffer size */
#define DBRI_RD_CRC (1 << 7 ) /* 0: CRC is correct */
#define DBRI_RD_BBC (1 << 6 ) /* 1: Bad Byte received */
#define DBRI_RD_ABT (1 << 5 ) /* Abort: frame aborted */
#define DBRI_RD_OVRN (1 << 3 ) /* Overrun: data lost */
#define DBRI_RD_STATUS(v) ((v) & 0 xff) /* Receive status */
#define DBRI_RD_CNT(v) (((v) >> 16 ) & 0 x1fff) /* Valid bytes in the buffer */
/* stream_info[] access */
/* Translate the ALSA direction into the array index */
#define DBRI_STREAMNO(substream) \
(substream->stream == \
SNDRV_PCM_STREAM_PLAYBACK ? DBRI_PLAY: DBRI_REC)
/* Return a pointer to dbri_streaminfo */
#define DBRI_STREAM(dbri, substream) \
&dbri->stream_info[DBRI_STREAMNO(substream)]
/*
* Short data pipes transmit LSB first . The CS4215 receives MSB first . Grrr .
* So we have to reverse the bits . Note : not all bit lengths are supported
*/
static __u32 reverse_bytes(__u32 b, int len)
{
switch (len) {
case 32 :
b = ((b & 0 xffff0000) >> 16 ) | ((b & 0 x0000ffff) << 16 );
fallthrough;
case 16 :
b = ((b & 0 xff00ff00) >> 8 ) | ((b & 0 x00ff00ff) << 8 );
fallthrough;
case 8 :
b = ((b & 0 xf0f0f0f0) >> 4 ) | ((b & 0 x0f0f0f0f) << 4 );
fallthrough;
case 4 :
b = ((b & 0 xcccccccc) >> 2 ) | ((b & 0 x33333333) << 2 );
fallthrough;
case 2 :
b = ((b & 0 xaaaaaaaa) >> 1 ) | ((b & 0 x55555555) << 1 );
case 1 :
case 0 :
break ;
default :
printk(KERN_ERR "DBRI reverse_bytes: unsupported length\n" );
}
return b;
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * DBRI initialization and command synchronization * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Commands are sent to the DBRI by building a list of them in memory ,
then writing the address of the first list item to DBRI register 8 .
The list is terminated with a WAIT command , which generates a
CPU interrupt to signal completion .
Since the DBRI can run in parallel with the CPU , several means of
synchronization present themselves . The method implemented here uses
the dbri_cmdwait ( ) to wait for execution of batch of sent commands .
A circular command buffer is used here . A new command is being added
while another can be executed . The scheme works by adding two WAIT commands
after each sent batch of commands . When the next batch is prepared it is
added after the WAIT commands then the WAITs are replaced with single JUMP
command to the new batch . Then the DBRI is forced to reread the last WAIT
command ( replaced by the JUMP by then ) . If the DBRI is still executing
previous commands the request to reread the WAIT command is ignored .
Every time a routine wants to write commands to the DBRI , it must
first call dbri_cmdlock ( ) and get pointer to a free space in
dbri - > dma - > cmd buffer . After this , the commands can be written to
the buffer , and dbri_cmdsend ( ) is called with the final pointer value
to send them to the DBRI .
*/
#define MAXLOOPS 20
/*
* Wait for the current command string to execute
*/
static void dbri_cmdwait(struct snd_dbri *dbri)
{
int maxloops = MAXLOOPS;
unsigned long flags;
/* Delay if previous commands are still being processed */
spin_lock_irqsave(&dbri->lock, flags);
while ((--maxloops) > 0 && (sbus_readl(dbri->regs + REG0) & D_P)) {
spin_unlock_irqrestore(&dbri->lock, flags);
msleep_interruptible(1 );
spin_lock_irqsave(&dbri->lock, flags);
}
spin_unlock_irqrestore(&dbri->lock, flags);
if (maxloops == 0 )
printk(KERN_ERR "DBRI: Chip never completed command buffer\n" );
else
dprintk(D_CMD, "Chip completed command buffer (%d)\n" ,
MAXLOOPS - maxloops - 1 );
}
/*
* Lock the command queue and return pointer to space for len cmd words
* It locks the cmdlock spinlock .
*/
static s32 *dbri_cmdlock(struct snd_dbri *dbri, int len)
{
u32 dvma_addr = (u32)dbri->dma_dvma;
/* Space for 2 WAIT cmds (replaced later by 1 JUMP cmd) */
len += 2 ;
spin_lock(&dbri->cmdlock);
if (dbri->cmdptr - dbri->dma->cmd + len < DBRI_NO_CMDS - 2 )
return dbri->cmdptr + 2 ;
else if (len < sbus_readl(dbri->regs + REG8) - dvma_addr)
return dbri->dma->cmd;
else
printk(KERN_ERR "DBRI: no space for commands." );
return NULL;
}
/*
* Send prepared cmd string . It works by writing a JUMP cmd into
* the last WAIT cmd and force DBRI to reread the cmd .
* The JUMP cmd points to the new cmd string .
* It also releases the cmdlock spinlock .
*
* Lock must be held before calling this .
*/
static void dbri_cmdsend(struct snd_dbri *dbri, s32 *cmd, int len)
{
u32 dvma_addr = (u32)dbri->dma_dvma;
s32 tmp, addr;
static int wait_id;
wait_id++;
wait_id &= 0 xffff; /* restrict it to a 16 bit counter. */
*(cmd) = DBRI_CMD(D_WAIT, 1 , wait_id);
*(cmd+1 ) = DBRI_CMD(D_WAIT, 1 , wait_id);
/* Replace the last command with JUMP */
addr = dvma_addr + (cmd - len - dbri->dma->cmd) * sizeof (s32);
*(dbri->cmdptr+1 ) = addr;
*(dbri->cmdptr) = DBRI_CMD(D_JUMP, 0 , 0 );
#ifdef DBRI_DEBUG
if (cmd > dbri->cmdptr) {
s32 *ptr;
for (ptr = dbri->cmdptr; ptr < cmd+2 ; ptr++)
dprintk(D_CMD, "cmd: %lx:%08x\n" ,
(unsigned long )ptr, *ptr);
} else {
s32 *ptr = dbri->cmdptr;
dprintk(D_CMD, "cmd: %lx:%08x\n" , (unsigned long )ptr, *ptr);
ptr++;
dprintk(D_CMD, "cmd: %lx:%08x\n" , (unsigned long )ptr, *ptr);
for (ptr = dbri->dma->cmd; ptr < cmd+2 ; ptr++)
dprintk(D_CMD, "cmd: %lx:%08x\n" ,
(unsigned long )ptr, *ptr);
}
#endif
/* Reread the last command */
tmp = sbus_readl(dbri->regs + REG0);
tmp |= D_P;
sbus_writel(tmp, dbri->regs + REG0);
dbri->cmdptr = cmd;
spin_unlock(&dbri->cmdlock);
}
/* Lock must be held when calling this */
static void dbri_reset(struct snd_dbri *dbri)
{
int i;
u32 tmp;
dprintk(D_GEN, "reset 0:%x 2:%x 8:%x 9:%x\n" ,
sbus_readl(dbri->regs + REG0),
sbus_readl(dbri->regs + REG2),
sbus_readl(dbri->regs + REG8), sbus_readl(dbri->regs + REG9));
sbus_writel(D_R, dbri->regs + REG0); /* Soft Reset */
for (i = 0 ; (sbus_readl(dbri->regs + REG0) & D_R) && i < 64 ; i++)
udelay(10 );
/* A brute approach - DBRI falls back to working burst size by itself
* On SS20 D_S does not work, so do not try so high. */
tmp = sbus_readl(dbri->regs + REG0);
tmp |= D_G | D_E;
tmp &= ~D_S;
sbus_writel(tmp, dbri->regs + REG0);
}
/* Lock must not be held before calling this */
static void dbri_initialize(struct snd_dbri *dbri)
{
u32 dvma_addr = (u32)dbri->dma_dvma;
s32 *cmd;
u32 dma_addr;
unsigned long flags;
int n;
spin_lock_irqsave(&dbri->lock, flags);
dbri_reset(dbri);
/* Initialize pipes */
for (n = 0 ; n < DBRI_NO_PIPES; n++)
dbri->pipes[n].desc = dbri->pipes[n].first_desc = -1 ;
spin_lock_init(&dbri->cmdlock);
/*
* Initialize the interrupt ring buffer .
*/
dma_addr = dvma_addr + dbri_dma_off(intr, 0 );
dbri->dma->intr[0 ] = dma_addr;
dbri->dbri_irqp = 1 ;
/*
* Set up the interrupt queue
*/
spin_lock(&dbri->cmdlock);
cmd = dbri->cmdptr = dbri->dma->cmd;
*(cmd++) = DBRI_CMD(D_IIQ, 0 , 0 );
*(cmd++) = dma_addr;
*(cmd++) = DBRI_CMD(D_PAUSE, 0 , 0 );
dbri->cmdptr = cmd;
*(cmd++) = DBRI_CMD(D_WAIT, 1 , 0 );
*(cmd++) = DBRI_CMD(D_WAIT, 1 , 0 );
dma_addr = dvma_addr + dbri_dma_off(cmd, 0 );
sbus_writel(dma_addr, dbri->regs + REG8);
spin_unlock(&dbri->cmdlock);
spin_unlock_irqrestore(&dbri->lock, flags);
dbri_cmdwait(dbri);
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * DBRI data pipe management * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
While DBRI control functions use the command and interrupt buffers , the
main data path takes the form of data pipes , which can be short ( command
and interrupt driven ) , or long ( attached to DMA buffers ) . These functions
provide a rudimentary means of setting up and managing the DBRI ' s pipes ,
but the calling functions have to make sure they respect the pipes ' linked
list ordering , among other things . The transmit and receive functions
here interface closely with the transmit and receive interrupt code .
*/
static inline int pipe_active(struct snd_dbri *dbri, int pipe)
{
return ((pipe >= 0 ) && (dbri->pipes[pipe].desc != -1 ));
}
/* reset_pipe(dbri, pipe)
*
* Called on an in - use pipe to clear anything being transmitted or received
* Lock must be held before calling this .
*/
static void reset_pipe(struct snd_dbri *dbri, int pipe)
{
int sdp;
int desc;
s32 *cmd;
if (pipe < 0 || pipe > DBRI_MAX_PIPE) {
printk(KERN_ERR "DBRI: reset_pipe called with "
"illegal pipe number\n" );
return ;
}
sdp = dbri->pipes[pipe].sdp;
if (sdp == 0 ) {
printk(KERN_ERR "DBRI: reset_pipe called "
"on uninitialized pipe\n" );
return ;
}
cmd = dbri_cmdlock(dbri, 3 );
*(cmd++) = DBRI_CMD(D_SDP, 0 , sdp | D_SDP_C | D_SDP_P);
*(cmd++) = 0 ;
*(cmd++) = DBRI_CMD(D_PAUSE, 0 , 0 );
dbri_cmdsend(dbri, cmd, 3 );
desc = dbri->pipes[pipe].first_desc;
if (desc >= 0 )
do {
dbri->dma->desc[desc].ba = 0 ;
dbri->dma->desc[desc].nda = 0 ;
desc = dbri->next_desc[desc];
} while (desc != -1 && desc != dbri->pipes[pipe].first_desc);
dbri->pipes[pipe].desc = -1 ;
dbri->pipes[pipe].first_desc = -1 ;
}
/*
* Lock must be held before calling this .
*/
static void setup_pipe(struct snd_dbri *dbri, int pipe, int sdp)
{
if (pipe < 0 || pipe > DBRI_MAX_PIPE) {
printk(KERN_ERR "DBRI: setup_pipe called "
"with illegal pipe number\n" );
return ;
}
if ((sdp & 0 xf800) != sdp) {
printk(KERN_ERR "DBRI: setup_pipe called "
"with strange SDP value\n" );
/* sdp &= 0xf800; */
}
/* If this is a fixed receive pipe, arrange for an interrupt
* every time its data changes
*/
if (D_SDP_MODE(sdp) == D_SDP_FIXED && !(sdp & D_SDP_TO_SER))
sdp |= D_SDP_CHANGE;
sdp |= D_PIPE(pipe);
dbri->pipes[pipe].sdp = sdp;
dbri->pipes[pipe].desc = -1 ;
dbri->pipes[pipe].first_desc = -1 ;
reset_pipe(dbri, pipe);
}
/*
* Lock must be held before calling this .
*/
static void link_time_slot(struct snd_dbri *dbri, int pipe,
int prevpipe, int nextpipe,
int length, int cycle)
{
s32 *cmd;
int val;
if (pipe < 0 || pipe > DBRI_MAX_PIPE
|| prevpipe < 0 || prevpipe > DBRI_MAX_PIPE
|| nextpipe < 0 || nextpipe > DBRI_MAX_PIPE) {
printk(KERN_ERR
"DBRI: link_time_slot called with illegal pipe number\n" );
return ;
}
if (dbri->pipes[pipe].sdp == 0
|| dbri->pipes[prevpipe].sdp == 0
|| dbri->pipes[nextpipe].sdp == 0 ) {
printk(KERN_ERR "DBRI: link_time_slot called "
"on uninitialized pipe\n" );
return ;
}
dbri->pipes[prevpipe].nextpipe = pipe;
dbri->pipes[pipe].nextpipe = nextpipe;
dbri->pipes[pipe].length = length;
cmd = dbri_cmdlock(dbri, 4 );
if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) {
/* Deal with CHI special case:
* " If transmission on edges 0 or 1 is desired , then cycle n
* ( where n = # of bit times per frame . . . ) must be used . "
* - DBRI data sheet , page 11
*/
if (prevpipe == 16 && cycle == 0 )
cycle = dbri->chi_bpf;
val = D_DTS_VO | D_DTS_INS | D_DTS_PRVOUT(prevpipe) | pipe;
*(cmd++) = DBRI_CMD(D_DTS, 0 , val);
*(cmd++) = 0 ;
*(cmd++) =
D_TS_LEN(length) | D_TS_CYCLE(cycle) | D_TS_NEXT(nextpipe);
} else {
val = D_DTS_VI | D_DTS_INS | D_DTS_PRVIN(prevpipe) | pipe;
*(cmd++) = DBRI_CMD(D_DTS, 0 , val);
*(cmd++) =
D_TS_LEN(length) | D_TS_CYCLE(cycle) | D_TS_NEXT(nextpipe);
*(cmd++) = 0 ;
}
*(cmd++) = DBRI_CMD(D_PAUSE, 0 , 0 );
dbri_cmdsend(dbri, cmd, 4 );
}
#if 0
/*
* Lock must be held before calling this .
*/
static void unlink_time_slot(struct snd_dbri *dbri, int pipe,
enum in_or_out direction, int prevpipe,
int nextpipe)
{
s32 *cmd;
int val;
if (pipe < 0 || pipe > DBRI_MAX_PIPE
|| prevpipe < 0 || prevpipe > DBRI_MAX_PIPE
|| nextpipe < 0 || nextpipe > DBRI_MAX_PIPE) {
printk(KERN_ERR
"DBRI: unlink_time_slot called with illegal pipe number\n" );
return ;
}
cmd = dbri_cmdlock(dbri, 4 );
if (direction == PIPEinput) {
val = D_DTS_VI | D_DTS_DEL | D_DTS_PRVIN(prevpipe) | pipe;
*(cmd++) = DBRI_CMD(D_DTS, 0 , val);
*(cmd++) = D_TS_NEXT(nextpipe);
*(cmd++) = 0 ;
} else {
val = D_DTS_VO | D_DTS_DEL | D_DTS_PRVOUT(prevpipe) | pipe;
*(cmd++) = DBRI_CMD(D_DTS, 0 , val);
*(cmd++) = 0 ;
*(cmd++) = D_TS_NEXT(nextpipe);
}
*(cmd++) = DBRI_CMD(D_PAUSE, 0 , 0 );
dbri_cmdsend(dbri, cmd, 4 );
}
#endif
/* xmit_fixed() / recv_fixed()
*
* Transmit / receive data on a " fixed " pipe - i . e , one whose contents are not
* expected to change much , and which we don ' t need to buffer .
* The DBRI only interrupts us when the data changes ( receive pipes ) ,
* or only changes the data when this function is called ( transmit pipes ) .
* Only short pipes ( numbers 16 - 31 ) can be used in fixed data mode .
*
* These function operate on a 32 - bit field , no matter how large
* the actual time slot is . The interrupt handler takes care of bit
* ordering and alignment . An 8 - bit time slot will always end up
* in the low - order 8 bits , filled either MSB - first or LSB - first ,
* depending on the settings passed to setup_pipe ( ) .
*
* Lock must not be held before calling it .
*/
static void xmit_fixed(struct snd_dbri *dbri, int pipe, unsigned int data)
{
s32 *cmd;
unsigned long flags;
if (pipe < 16 || pipe > DBRI_MAX_PIPE) {
printk(KERN_ERR "DBRI: xmit_fixed: Illegal pipe number\n" );
return ;
}
if (D_SDP_MODE(dbri->pipes[pipe].sdp) == 0 ) {
printk(KERN_ERR "DBRI: xmit_fixed: "
"Uninitialized pipe %d\n" , pipe);
return ;
}
if (D_SDP_MODE(dbri->pipes[pipe].sdp) != D_SDP_FIXED) {
printk(KERN_ERR "DBRI: xmit_fixed: Non-fixed pipe %d\n" , pipe);
return ;
}
if (!(dbri->pipes[pipe].sdp & D_SDP_TO_SER)) {
printk(KERN_ERR "DBRI: xmit_fixed: Called on receive pipe %d\n" ,
pipe);
return ;
}
/* DBRI short pipes always transmit LSB first */
if (dbri->pipes[pipe].sdp & D_SDP_MSB)
data = reverse_bytes(data, dbri->pipes[pipe].length);
cmd = dbri_cmdlock(dbri, 3 );
*(cmd++) = DBRI_CMD(D_SSP, 0 , pipe);
*(cmd++) = data;
*(cmd++) = DBRI_CMD(D_PAUSE, 0 , 0 );
spin_lock_irqsave(&dbri->lock, flags);
dbri_cmdsend(dbri, cmd, 3 );
spin_unlock_irqrestore(&dbri->lock, flags);
dbri_cmdwait(dbri);
}
static void recv_fixed(struct snd_dbri *dbri, int pipe, volatile __u32 *ptr)
{
if (pipe < 16 || pipe > DBRI_MAX_PIPE) {
printk(KERN_ERR "DBRI: recv_fixed called with "
"illegal pipe number\n" );
return ;
}
if (D_SDP_MODE(dbri->pipes[pipe].sdp) != D_SDP_FIXED) {
printk(KERN_ERR "DBRI: recv_fixed called on "
"non-fixed pipe %d\n" , pipe);
return ;
}
if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) {
printk(KERN_ERR "DBRI: recv_fixed called on "
"transmit pipe %d\n" , pipe);
return ;
}
dbri->pipes[pipe].recv_fixed_ptr = ptr;
}
/* setup_descs()
*
* Setup transmit / receive data on a " long " pipe - i . e , one associated
* with a DMA buffer .
*
* Only pipe numbers 0 - 15 can be used in this mode .
*
* This function takes a stream number pointing to a data buffer ,
* and work by building chains of descriptors which identify the
* data buffers . Buffers too large for a single descriptor will
* be spread across multiple descriptors .
*
* All descriptors create a ring buffer .
*
* Lock must be held before calling this .
*/
static int setup_descs(struct snd_dbri *dbri, int streamno, unsigned int period)
{
struct dbri_streaminfo *info = &dbri->stream_info[streamno];
u32 dvma_addr = (u32)dbri->dma_dvma;
__u32 dvma_buffer;
int desc;
int len;
int first_desc = -1 ;
int last_desc = -1 ;
if (info->pipe < 0 || info->pipe > 15 ) {
printk(KERN_ERR "DBRI: setup_descs: Illegal pipe number\n" );
return -2 ;
}
if (dbri->pipes[info->pipe].sdp == 0 ) {
printk(KERN_ERR "DBRI: setup_descs: Uninitialized pipe %d\n" ,
info->pipe);
return -2 ;
}
dvma_buffer = info->dvma_buffer;
len = info->size;
if (streamno == DBRI_PLAY) {
if (!(dbri->pipes[info->pipe].sdp & D_SDP_TO_SER)) {
printk(KERN_ERR "DBRI: setup_descs: "
"Called on receive pipe %d\n" , info->pipe);
return -2 ;
}
} else {
if (dbri->pipes[info->pipe].sdp & D_SDP_TO_SER) {
printk(KERN_ERR
"DBRI: setup_descs: Called on transmit pipe %d\n" ,
info->pipe);
return -2 ;
}
/* Should be able to queue multiple buffers
* to receive on a pipe
*/
if (pipe_active(dbri, info->pipe)) {
printk(KERN_ERR "DBRI: recv_on_pipe: "
"Called on active pipe %d\n" , info->pipe);
return -2 ;
}
/* Make sure buffer size is multiple of four */
len &= ~3 ;
}
/* Free descriptors if pipe has any */
desc = dbri->pipes[info->pipe].first_desc;
if (desc >= 0 )
do {
dbri->dma->desc[desc].ba = 0 ;
dbri->dma->desc[desc].nda = 0 ;
desc = dbri->next_desc[desc];
} while (desc != -1 &&
desc != dbri->pipes[info->pipe].first_desc);
dbri->pipes[info->pipe].desc = -1 ;
dbri->pipes[info->pipe].first_desc = -1 ;
desc = 0 ;
while (len > 0 ) {
int mylen;
for (; desc < DBRI_NO_DESCS; desc++) {
if (!dbri->dma->desc[desc].ba)
break ;
}
if (desc == DBRI_NO_DESCS) {
printk(KERN_ERR "DBRI: setup_descs: No descriptors\n" );
return -1 ;
}
if (len > DBRI_TD_MAXCNT)
mylen = DBRI_TD_MAXCNT; /* 8KB - 4 */
else
mylen = len;
if (mylen > period)
mylen = period;
dbri->next_desc[desc] = -1 ;
dbri->dma->desc[desc].ba = dvma_buffer;
dbri->dma->desc[desc].nda = 0 ;
if (streamno == DBRI_PLAY) {
dbri->dma->desc[desc].word1 = DBRI_TD_CNT(mylen);
dbri->dma->desc[desc].word4 = 0 ;
dbri->dma->desc[desc].word1 |= DBRI_TD_F | DBRI_TD_B;
} else {
dbri->dma->desc[desc].word1 = 0 ;
dbri->dma->desc[desc].word4 =
DBRI_RD_B | DBRI_RD_BCNT(mylen);
}
if (first_desc == -1 )
first_desc = desc;
else {
dbri->next_desc[last_desc] = desc;
dbri->dma->desc[last_desc].nda =
dvma_addr + dbri_dma_off(desc, desc);
}
last_desc = desc;
dvma_buffer += mylen;
len -= mylen;
}
if (first_desc == -1 || last_desc == -1 ) {
printk(KERN_ERR "DBRI: setup_descs: "
" Not enough descriptors available\n" );
return -1 ;
}
dbri->dma->desc[last_desc].nda =
dvma_addr + dbri_dma_off(desc, first_desc);
dbri->next_desc[last_desc] = first_desc;
dbri->pipes[info->pipe].first_desc = first_desc;
dbri->pipes[info->pipe].desc = first_desc;
#ifdef DBRI_DEBUG
for (desc = first_desc; desc != -1 ;) {
dprintk(D_DESC, "DESC %d: %08x %08x %08x %08x\n" ,
desc,
dbri->dma->desc[desc].word1,
dbri->dma->desc[desc].ba,
dbri->dma->desc[desc].nda, dbri->dma->desc[desc].word4);
desc = dbri->next_desc[desc];
if (desc == first_desc)
break ;
}
#endif
return 0 ;
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * DBRI - CHI interface * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
The CHI is a four - wire ( clock , frame sync , data in , data out ) time - division
multiplexed serial interface which the DBRI can operate in either master
( give clock / frame sync ) or slave ( take clock / frame sync ) mode .
*/
enum master_or_slave { CHImaster, CHIslave };
/*
* Lock must not be held before calling it .
*/
static void reset_chi(struct snd_dbri *dbri,
enum master_or_slave master_or_slave,
int bits_per_frame)
{
s32 *cmd;
int val;
/* Set CHI Anchor: Pipe 16 */
cmd = dbri_cmdlock(dbri, 4 );
val = D_DTS_VO | D_DTS_VI | D_DTS_INS
| D_DTS_PRVIN(16 ) | D_PIPE(16 ) | D_DTS_PRVOUT(16 );
*(cmd++) = DBRI_CMD(D_DTS, 0 , val);
*(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16 );
*(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16 );
*(cmd++) = DBRI_CMD(D_PAUSE, 0 , 0 );
dbri_cmdsend(dbri, cmd, 4 );
dbri->pipes[16 ].sdp = 1 ;
dbri->pipes[16 ].nextpipe = 16 ;
cmd = dbri_cmdlock(dbri, 4 );
if (master_or_slave == CHIslave) {
/* Setup DBRI for CHI Slave - receive clock, frame sync (FS)
*
* CHICM = 0 ( slave mode , 8 kHz frame rate )
* IR = give immediate CHI status interrupt
* EN = give CHI status interrupt upon change
*/
*(cmd++) = DBRI_CMD(D_CHI, 0 , D_CHI_CHICM(0 ));
} else {
/* Setup DBRI for CHI Master - generate clock, FS
*
* BPF = bits per 8 kHz frame
* 12 . 288 MHz / CHICM_divisor = clock rate
* FD = 1 - drive CHIFS on rising edge of CHICK
*/
int clockrate = bits_per_frame * 8 ;
int divisor = 12288 / clockrate;
if (divisor > 255 || divisor * clockrate != 12288 )
printk(KERN_ERR "DBRI: illegal bits_per_frame "
"in setup_chi\n" );
*(cmd++) = DBRI_CMD(D_CHI, 0 , D_CHI_CHICM(divisor) | D_CHI_FD
| D_CHI_BPF(bits_per_frame));
}
dbri->chi_bpf = bits_per_frame;
/* CHI Data Mode
*
* RCE = 0 - receive on falling edge of CHICK
* XCE = 1 - transmit on rising edge of CHICK
* XEN = 1 - enable transmitter
* REN = 1 - enable receiver
*/
*(cmd++) = DBRI_CMD(D_PAUSE, 0 , 0 );
*(cmd++) = DBRI_CMD(D_CDM, 0 , D_CDM_XCE | D_CDM_XEN | D_CDM_REN);
*(cmd++) = DBRI_CMD(D_PAUSE, 0 , 0 );
dbri_cmdsend(dbri, cmd, 4 );
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * CS4215 audio codec management * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
In the standard SPARC audio configuration , the CS4215 codec is attached
to the DBRI via the CHI interface and few of the DBRI ' s PIO pins .
* Lock must not be held before calling it .
*/
static void cs4215_setup_pipes(struct snd_dbri *dbri)
{
unsigned long flags;
spin_lock_irqsave(&dbri->lock, flags);
/*
* Data mode :
* Pipe 4 : Send timeslots 1 - 4 ( audio data )
* Pipe 20 : Send timeslots 5 - 8 ( part of ctrl data )
* Pipe 6 : Receive timeslots 1 - 4 ( audio data )
* Pipe 21 : Receive timeslots 6 - 7 . We can only receive 20 bits via
* interrupt , and the rest of the data ( slot 5 and 8 ) is
* not relevant for us ( only for doublechecking ) .
*
* Control mode :
* Pipe 17 : Send timeslots 1 - 4 ( slots 5 - 8 are read only )
* Pipe 18 : Receive timeslot 1 ( clb ) .
* Pipe 19 : Receive timeslot 7 ( version ) .
*/
setup_pipe(dbri, 4 , D_SDP_MEM | D_SDP_TO_SER | D_SDP_MSB);
setup_pipe(dbri, 20 , D_SDP_FIXED | D_SDP_TO_SER | D_SDP_MSB);
setup_pipe(dbri, 6 , D_SDP_MEM | D_SDP_FROM_SER | D_SDP_MSB);
setup_pipe(dbri, 21 , D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB);
setup_pipe(dbri, 17 , D_SDP_FIXED | D_SDP_TO_SER | D_SDP_MSB);
setup_pipe(dbri, 18 , D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB);
setup_pipe(dbri, 19 , D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB);
spin_unlock_irqrestore(&dbri->lock, flags);
dbri_cmdwait(dbri);
}
static int cs4215_init_data(struct cs4215 *mm)
{
/*
* No action , memory resetting only .
*
* Data Time Slot 5 - 8
* Speaker , Line and Headphone enable . Gain set to the half .
* Input is mike .
*/
mm->data[0 ] = CS4215_LO(0 x20) | CS4215_HE | CS4215_LE;
mm->data[1 ] = CS4215_RO(0 x20) | CS4215_SE;
mm->data[2 ] = CS4215_LG(0 x8) | CS4215_IS | CS4215_PIO0 | CS4215_PIO1;
mm->data[3 ] = CS4215_RG(0 x8) | CS4215_MA(0 xf);
/*
* Control Time Slot 1 - 4
* 0 : Default I / O voltage scale
* 1 : 8 bit ulaw , 8 kHz , mono , high pass filter disabled
* 2 : Serial enable , CHI master , 128 bits per frame , clock 1
* 3 : Tests disabled
*/
mm->ctrl[0 ] = CS4215_RSRVD_1 | CS4215_MLB;
mm->ctrl[1 ] = CS4215_DFR_ULAW | CS4215_FREQ[0 ].csval;
mm->ctrl[2 ] = CS4215_XCLK | CS4215_BSEL_128 | CS4215_FREQ[0 ].xtal;
mm->ctrl[3 ] = 0 ;
mm->status = 0 ;
mm->version = 0 xff;
mm->precision = 8 ; /* For ULAW */
mm->channels = 1 ;
return 0 ;
}
static void cs4215_setdata(struct snd_dbri *dbri, int muted)
{
if (muted) {
dbri->mm.data[0 ] |= 63 ;
dbri->mm.data[1 ] |= 63 ;
dbri->mm.data[2 ] &= ~15 ;
dbri->mm.data[3 ] &= ~15 ;
} else {
/* Start by setting the playback attenuation. */
struct dbri_streaminfo *info = &dbri->stream_info[DBRI_PLAY];
int left_gain = info->left_gain & 0 x3f;
int right_gain = info->right_gain & 0 x3f;
dbri->mm.data[0 ] &= ~0 x3f; /* Reset the volume bits */
dbri->mm.data[1 ] &= ~0 x3f;
dbri->mm.data[0 ] |= (DBRI_MAX_VOLUME - left_gain);
dbri->mm.data[1 ] |= (DBRI_MAX_VOLUME - right_gain);
/* Now set the recording gain. */
info = &dbri->stream_info[DBRI_REC];
left_gain = info->left_gain & 0 xf;
right_gain = info->right_gain & 0 xf;
dbri->mm.data[2 ] |= CS4215_LG(left_gain);
dbri->mm.data[3 ] |= CS4215_RG(right_gain);
}
xmit_fixed(dbri, 20 , *(int *)dbri->mm.data);
}
/*
* Set the CS4215 to data mode .
*/
static void cs4215_open(struct snd_dbri *dbri)
{
int data_width;
u32 tmp;
unsigned long flags;
dprintk(D_MM, "cs4215_open: %d channels, %d bits\n" ,
dbri->mm.channels, dbri->mm.precision);
/* Temporarily mute outputs, and wait 1/8000 sec (125 us)
* to make sure this takes . This avoids clicking noises .
*/
cs4215_setdata(dbri, 1 );
udelay(125 );
/*
* Data mode :
* Pipe 4 : Send timeslots 1 - 4 ( audio data )
* Pipe 20 : Send timeslots 5 - 8 ( part of ctrl data )
* Pipe 6 : Receive timeslots 1 - 4 ( audio data )
* Pipe 21 : Receive timeslots 6 - 7 . We can only receive 20 bits via
* interrupt , and the rest of the data ( slot 5 and 8 ) is
* not relevant for us ( only for doublechecking ) .
*
* Just like in control mode , the time slots are all offset by eight
* bits . The CS4215 , it seems , observes TSIN ( the delayed signal )
* even if it ' s the CHI master . Don ' t ask me . . .
*/
spin_lock_irqsave(&dbri->lock, flags);
tmp = sbus_readl(dbri->regs + REG0);
tmp &= ~(D_C); /* Disable CHI */
sbus_writel(tmp, dbri->regs + REG0);
/* Switch CS4215 to data mode - set PIO3 to 1 */
sbus_writel(D_ENPIO | D_PIO1 | D_PIO3 |
(dbri->mm.onboard ? D_PIO0 : D_PIO2), dbri->regs + REG2);
reset_chi(dbri, CHIslave, 128 );
/* Note: this next doesn't work for 8-bit stereo, because the two
* channels would be on timeslots 1 and 3 , with 2 and 4 idle .
* ( See CS4215 datasheet Fig 15 )
*
* DBRI non - contiguous mode would be required to make this work .
*/
data_width = dbri->mm.channels * dbri->mm.precision;
link_time_slot(dbri, 4 , 16 , 16 , data_width, dbri->mm.offset);
link_time_slot(dbri, 20 , 4 , 16 , 32 , dbri->mm.offset + 32 );
link_time_slot(dbri, 6 , 16 , 16 , data_width, dbri->mm.offset);
link_time_slot(dbri, 21 , 6 , 16 , 16 , dbri->mm.offset + 40 );
/* FIXME: enable CHI after _setdata? */
tmp = sbus_readl(dbri->regs + REG0);
tmp |= D_C; /* Enable CHI */
sbus_writel(tmp, dbri->regs + REG0);
spin_unlock_irqrestore(&dbri->lock, flags);
cs4215_setdata(dbri, 0 );
}
/*
* Send the control information ( i . e . audio format )
*/
static int cs4215_setctrl(struct snd_dbri *dbri)
{
int i, val;
u32 tmp;
unsigned long flags;
/* FIXME - let the CPU do something useful during these delays */
/* Temporarily mute outputs, and wait 1/8000 sec (125 us)
* to make sure this takes . This avoids clicking noises .
*/
cs4215_setdata(dbri, 1 );
udelay(125 );
/*
* Enable Control mode : Set DBRI ' s PIO3 ( 4215 ' s D / ~ C ) to 0 , then wait
* 12 cycles < = 12 / ( 5512 . 5 * 64 ) sec = 34 . 01 usec
*/
val = D_ENPIO | D_PIO1 | (dbri->mm.onboard ? D_PIO0 : D_PIO2);
sbus_writel(val, dbri->regs + REG2);
dprintk(D_MM, "cs4215_setctrl: reg2=0x%x\n" , val);
udelay(34 );
/* In Control mode, the CS4215 is a slave device, so the DBRI must
* operate as CHI master , supplying clocking and frame synchronization .
*
* In Data mode , however , the CS4215 must be CHI master to insure
* that its data stream is synchronous with its codec .
*
* The upshot of all this ? We start by putting the DBRI into master
* mode , program the CS4215 in Control mode , then switch the CS4215
* into Data mode and put the DBRI into slave mode . Various timing
* requirements must be observed along the way .
*
* Oh , and one more thing , on a SPARCStation 20 ( and maybe
* others ? ) , the addressing of the CS4215 ' s time slots is
* offset by eight bits , so we add eight to all the " cycle "
* values in the Define Time Slot ( DTS ) commands . This is
* done in hardware by a TI 248 that delays the DBRI - > 4215
* frame sync signal by eight clock cycles . Anybody know why ?
*/
spin_lock_irqsave(&dbri->lock, flags);
tmp = sbus_readl(dbri->regs + REG0);
tmp &= ~D_C; /* Disable CHI */
sbus_writel(tmp, dbri->regs + REG0);
reset_chi(dbri, CHImaster, 128 );
/*
* Control mode :
* Pipe 17 : Send timeslots 1 - 4 ( slots 5 - 8 are read only )
* Pipe 18 : Receive timeslot 1 ( clb ) .
* Pipe 19 : Receive timeslot 7 ( version ) .
*/
link_time_slot(dbri, 17 , 16 , 16 , 32 , dbri->mm.offset);
link_time_slot(dbri, 18 , 16 , 16 , 8 , dbri->mm.offset);
link_time_slot(dbri, 19 , 18 , 16 , 8 , dbri->mm.offset + 48 );
spin_unlock_irqrestore(&dbri->lock, flags);
/* Wait for the chip to echo back CLB (Control Latch Bit) as zero */
dbri->mm.ctrl[0 ] &= ~CS4215_CLB;
xmit_fixed(dbri, 17 , *(int *)dbri->mm.ctrl);
spin_lock_irqsave(&dbri->lock, flags);
tmp = sbus_readl(dbri->regs + REG0);
tmp |= D_C; /* Enable CHI */
sbus_writel(tmp, dbri->regs + REG0);
spin_unlock_irqrestore(&dbri->lock, flags);
for (i = 10 ; ((dbri->mm.status & 0 xe4) != 0 x20); --i)
msleep_interruptible(1 );
if (i == 0 ) {
dprintk(D_MM, "CS4215 didn't respond to CLB (0x%02x)\n" ,
dbri->mm.status);
return -1 ;
}
/* Disable changes to our copy of the version number, as we are about
* to leave control mode .
*/
recv_fixed(dbri, 19 , NULL);
/* Terminate CS4215 control mode - data sheet says
* " Set CLB = 1 and send two more frames of valid control info "
*/
dbri->mm.ctrl[0 ] |= CS4215_CLB;
xmit_fixed(dbri, 17 , *(int *)dbri->mm.ctrl);
/* Two frames of control info @ 8kHz frame rate = 250 us delay */
udelay(250 );
cs4215_setdata(dbri, 0 );
return 0 ;
}
/*
* Setup the codec with the sampling rate , audio format and number of
* channels .
* As part of the process we resend the settings for the data
* timeslots as well .
*/
static int cs4215_prepare(struct snd_dbri *dbri, unsigned int rate,
snd_pcm_format_t format, unsigned int channels)
{
int freq_idx;
int ret = 0 ;
/* Lookup index for this rate */
for (freq_idx = 0 ; CS4215_FREQ[freq_idx].freq != 0 ; freq_idx++) {
if (CS4215_FREQ[freq_idx].freq == rate)
break ;
}
if (CS4215_FREQ[freq_idx].freq != rate) {
printk(KERN_WARNING "DBRI: Unsupported rate %d Hz\n" , rate);
return -1 ;
}
switch (format) {
case SNDRV_PCM_FORMAT_MU_LAW:
dbri->mm.ctrl[1 ] = CS4215_DFR_ULAW;
dbri->mm.precision = 8 ;
break ;
case SNDRV_PCM_FORMAT_A_LAW:
dbri->mm.ctrl[1 ] = CS4215_DFR_ALAW;
dbri->mm.precision = 8 ;
break ;
case SNDRV_PCM_FORMAT_U8:
dbri->mm.ctrl[1 ] = CS4215_DFR_LINEAR8;
dbri->mm.precision = 8 ;
break ;
case SNDRV_PCM_FORMAT_S16_BE:
dbri->mm.ctrl[1 ] = CS4215_DFR_LINEAR16;
dbri->mm.precision = 16 ;
break ;
default :
printk(KERN_WARNING "DBRI: Unsupported format %d\n" , format);
return -1 ;
}
/* Add rate parameters */
dbri->mm.ctrl[1 ] |= CS4215_FREQ[freq_idx].csval;
dbri->mm.ctrl[2 ] = CS4215_XCLK |
CS4215_BSEL_128 | CS4215_FREQ[freq_idx].xtal;
dbri->mm.channels = channels;
if (channels == 2 )
dbri->mm.ctrl[1 ] |= CS4215_DFR_STEREO;
ret = cs4215_setctrl(dbri);
if (ret == 0 )
cs4215_open(dbri); /* set codec to data mode */
return ret;
}
/*
*
*/
static int cs4215_init(struct snd_dbri *dbri)
{
u32 reg2 = sbus_readl(dbri->regs + REG2);
dprintk(D_MM, "cs4215_init: reg2=0x%x\n" , reg2);
/* Look for the cs4215 chips */
if (reg2 & D_PIO2) {
dprintk(D_MM, "Onboard CS4215 detected\n" );
dbri->mm.onboard = 1 ;
}
if (reg2 & D_PIO0) {
dprintk(D_MM, "Speakerbox detected\n" );
dbri->mm.onboard = 0 ;
if (reg2 & D_PIO2) {
printk(KERN_INFO "DBRI: Using speakerbox / "
"ignoring onboard mmcodec.\n" );
sbus_writel(D_ENPIO2, dbri->regs + REG2);
}
}
if (!(reg2 & (D_PIO0 | D_PIO2))) {
printk(KERN_ERR "DBRI: no mmcodec found.\n" );
return -EIO;
}
cs4215_setup_pipes(dbri);
cs4215_init_data(&dbri->mm);
/* Enable capture of the status & version timeslots. */
recv_fixed(dbri, 18 , &dbri->mm.status);
recv_fixed(dbri, 19 , &dbri->mm.version);
dbri->mm.offset = dbri->mm.onboard ? 0 : 8 ;
if (cs4215_setctrl(dbri) == -1 || dbri->mm.version == 0 xff) {
dprintk(D_MM, "CS4215 failed probe at offset %d\n" ,
dbri->mm.offset);
return -EIO;
}
dprintk(D_MM, "Found CS4215 at offset %d\n" , dbri->mm.offset);
return 0 ;
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * DBRI interrupt handler * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
The DBRI communicates with the CPU mainly via a circular interrupt
buffer . When an interrupt is signaled , the CPU walks through the
buffer and calls dbri_process_one_interrupt ( ) for each interrupt word .
Complicated interrupts are handled by dedicated functions ( which
appear first in this file ) . Any pending interrupts can be serviced by
calling dbri_process_interrupt_buffer ( ) , which works even if the CPU ' s
interrupts are disabled .
*/
/* xmit_descs()
*
* Starts transmitting the current TD ' s for recording / playing .
* For playback , ALSA has filled the DMA memory with new data ( we hope ) .
*/
static void xmit_descs(struct snd_dbri *dbri)
{
struct dbri_streaminfo *info;
u32 dvma_addr;
s32 *cmd;
unsigned long flags;
int first_td;
if (dbri == NULL)
return ; /* Disabled */
dvma_addr = (u32)dbri->dma_dvma;
info = &dbri->stream_info[DBRI_REC];
spin_lock_irqsave(&dbri->lock, flags);
if (info->pipe >= 0 ) {
first_td = dbri->pipes[info->pipe].first_desc;
dprintk(D_DESC, "xmit_descs rec @ TD %d\n" , first_td);
/* Stream could be closed by the time we run. */
if (first_td >= 0 ) {
cmd = dbri_cmdlock(dbri, 2 );
*(cmd++) = DBRI_CMD(D_SDP, 0 ,
dbri->pipes[info->pipe].sdp
| D_SDP_P | D_SDP_EVERY | D_SDP_C);
*(cmd++) = dvma_addr +
dbri_dma_off(desc, first_td);
dbri_cmdsend(dbri, cmd, 2 );
/* Reset our admin of the pipe. */
dbri->pipes[info->pipe].desc = first_td;
}
}
info = &dbri->stream_info[DBRI_PLAY];
if (info->pipe >= 0 ) {
first_td = dbri->pipes[info->pipe].first_desc;
dprintk(D_DESC, "xmit_descs play @ TD %d\n" , first_td);
/* Stream could be closed by the time we run. */
if (first_td >= 0 ) {
cmd = dbri_cmdlock(dbri, 2 );
*(cmd++) = DBRI_CMD(D_SDP, 0 ,
dbri->pipes[info->pipe].sdp
| D_SDP_P | D_SDP_EVERY | D_SDP_C);
*(cmd++) = dvma_addr +
dbri_dma_off(desc, first_td);
dbri_cmdsend(dbri, cmd, 2 );
/* Reset our admin of the pipe. */
dbri->pipes[info->pipe].desc = first_td;
}
}
spin_unlock_irqrestore(&dbri->lock, flags);
}
/* transmission_complete_intr()
*
* Called by main interrupt handler when DBRI signals transmission complete
* on a pipe ( interrupt triggered by the B bit in a transmit descriptor ) .
*
* Walks through the pipe ' s list of transmit buffer descriptors and marks
* them as available . Stops when the first descriptor is found without
* TBC ( Transmit Buffer Complete ) set , or we ' ve run through them all .
*
* The DMA buffers are not released . They form a ring buffer and
* they are filled by ALSA while others are transmitted by DMA .
*
*/
static void transmission_complete_intr(struct snd_dbri *dbri, int pipe)
{
struct dbri_streaminfo *info = &dbri->stream_info[DBRI_PLAY];
int td = dbri->pipes[pipe].desc;
int status;
while (td >= 0 ) {
if (td >= DBRI_NO_DESCS) {
printk(KERN_ERR "DBRI: invalid td on pipe %d\n" , pipe);
return ;
}
status = DBRI_TD_STATUS(dbri->dma->desc[td].word4);
if (!(status & DBRI_TD_TBC))
break ;
dprintk(D_INT, "TD %d, status 0x%02x\n" , td, status);
dbri->dma->desc[td].word4 = 0 ; /* Reset it for next time. */
info->offset += DBRI_RD_CNT(dbri->dma->desc[td].word1);
td = dbri->next_desc[td];
dbri->pipes[pipe].desc = td;
}
/* Notify ALSA */
spin_unlock(&dbri->lock);
snd_pcm_period_elapsed(info->substream);
spin_lock(&dbri->lock);
}
static void reception_complete_intr(struct snd_dbri *dbri, int pipe)
{
struct dbri_streaminfo *info;
int rd = dbri->pipes[pipe].desc;
s32 status;
if (rd < 0 || rd >= DBRI_NO_DESCS) {
printk(KERN_ERR "DBRI: invalid rd on pipe %d\n" , pipe);
return ;
}
dbri->pipes[pipe].desc = dbri->next_desc[rd];
status = dbri->dma->desc[rd].word1;
dbri->dma->desc[rd].word1 = 0 ; /* Reset it for next time. */
info = &dbri->stream_info[DBRI_REC];
info->offset += DBRI_RD_CNT(status);
/* FIXME: Check status */
dprintk(D_INT, "Recv RD %d, status 0x%02x, len %d\n" ,
rd, DBRI_RD_STATUS(status), DBRI_RD_CNT(status));
/* Notify ALSA */
spin_unlock(&dbri->lock);
snd_pcm_period_elapsed(info->substream);
spin_lock(&dbri->lock);
}
static void dbri_process_one_interrupt(struct snd_dbri *dbri, int x)
{
int val = D_INTR_GETVAL(x);
int channel = D_INTR_GETCHAN(x);
int command = D_INTR_GETCMD(x);
int code = D_INTR_GETCODE(x);
#ifdef DBRI_DEBUG
int rval = D_INTR_GETRVAL(x);
#endif
if (channel == D_INTR_CMD) {
dprintk(D_CMD, "INTR: Command: %-5s Value:%d\n" ,
cmds[command], val);
} else {
dprintk(D_INT, "INTR: Chan:%d Code:%d Val:%#x\n" ,
channel, code, rval);
}
switch (code) {
case D_INTR_CMDI:
if (command != D_WAIT)
printk(KERN_ERR "DBRI: Command read interrupt\n" );
break ;
case D_INTR_BRDY:
reception_complete_intr(dbri, channel);
break ;
case D_INTR_XCMP:
case D_INTR_MINT:
transmission_complete_intr(dbri, channel);
break ;
case D_INTR_UNDR:
/* UNDR - Transmission underrun
* resend SDP command with clear pipe bit ( C ) set
*/
{
/* FIXME: do something useful in case of underrun */
printk(KERN_ERR "DBRI: Underrun error\n" );
#if 0
s32 *cmd;
int pipe = channel;
int td = dbri->pipes[pipe].desc;
dbri->dma->desc[td].word4 = 0 ;
cmd = dbri_cmdlock(dbri, NoGetLock);
*(cmd++) = DBRI_CMD(D_SDP, 0 ,
dbri->pipes[pipe].sdp
| D_SDP_P | D_SDP_C | D_SDP_2SAME);
*(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, td);
dbri_cmdsend(dbri, cmd);
#endif
}
break ;
case D_INTR_FXDT:
/* FXDT - Fixed data change */
if (dbri->pipes[channel].sdp & D_SDP_MSB)
val = reverse_bytes(val, dbri->pipes[channel].length);
if (dbri->pipes[channel].recv_fixed_ptr)
*(dbri->pipes[channel].recv_fixed_ptr) = val;
break ;
default :
if (channel != D_INTR_CMD)
printk(KERN_WARNING
"DBRI: Ignored Interrupt: %d (0x%x)\n" , code, x);
}
}
/* dbri_process_interrupt_buffer advances through the DBRI's interrupt
* buffer until it finds a zero word ( indicating nothing more to do
* right now ) . Non - zero words require processing and are handed off
* to dbri_process_one_interrupt AFTER advancing the pointer .
*/
static void dbri_process_interrupt_buffer(struct snd_dbri *dbri)
{
s32 x;
while ((x = dbri->dma->intr[dbri->dbri_irqp]) != 0 ) {
dbri->dma->intr[dbri->dbri_irqp] = 0 ;
dbri->dbri_irqp++;
if (dbri->dbri_irqp == DBRI_INT_BLK)
dbri->dbri_irqp = 1 ;
dbri_process_one_interrupt(dbri, x);
}
}
static irqreturn_t snd_dbri_interrupt(int irq, void *dev_id)
{
struct snd_dbri *dbri = dev_id;
static int errcnt;
int x;
if (dbri == NULL)
return IRQ_NONE;
spin_lock(&dbri->lock);
/*
* Read it , so the interrupt goes away .
*/
x = sbus_readl(dbri->regs + REG1);
if (x & (D_MRR | D_MLE | D_LBG | D_MBE)) {
u32 tmp;
if (x & D_MRR)
printk(KERN_ERR
"DBRI: Multiple Error Ack on SBus reg1=0x%x\n" ,
x);
if (x & D_MLE)
printk(KERN_ERR
"DBRI: Multiple Late Error on SBus reg1=0x%x\n" ,
x);
if (x & D_LBG)
printk(KERN_ERR
"DBRI: Lost Bus Grant on SBus reg1=0x%x\n" , x);
if (x & D_MBE)
printk(KERN_ERR
"DBRI: Burst Error on SBus reg1=0x%x\n" , x);
/* Some of these SBus errors cause the chip's SBus circuitry
* to be disabled , so just re - enable and try to keep going .
*
* The only one I ' ve seen is MRR , which will be triggered
* if you let a transmit pipe underrun , then try to CDP it .
*
* If these things persist , we reset the chip .
*/
if ((++errcnt) % 10 == 0 ) {
dprintk(D_INT, "Interrupt errors exceeded.\n" );
dbri_reset(dbri);
} else {
tmp = sbus_readl(dbri->regs + REG0);
tmp &= ~(D_D);
sbus_writel(tmp, dbri->regs + REG0);
}
}
dbri_process_interrupt_buffer(dbri);
spin_unlock(&dbri->lock);
return IRQ_HANDLED;
}
/****************************************************************************
PCM Interface
****************************************************************************/
static const struct snd_pcm_hardware snd_dbri_pcm_hw = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BATCH,
.formats = SNDRV_PCM_FMTBIT_MU_LAW |
SNDRV_PCM_FMTBIT_A_LAW |
SNDRV_PCM_FMTBIT_U8 |
SNDRV_PCM_FMTBIT_S16_BE,
.rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_5512,
.rate_min = 5512 ,
.rate_max = 48000 ,
.channels_min = 1 ,
.channels_max = 2 ,
.buffer_bytes_max = 64 * 1024 ,
.period_bytes_min = 1 ,
.period_bytes_max = DBRI_TD_MAXCNT,
.periods_min = 1 ,
.periods_max = 1024 ,
};
static int snd_hw_rule_format(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_interval *c = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_mask *f = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
struct snd_mask fmt;
snd_mask_any(&fmt);
if (c->min > 1 ) {
fmt.bits[0 ] &= SNDRV_PCM_FMTBIT_S16_BE;
return snd_mask_refine(f, &fmt);
}
return 0 ;
}
static int snd_hw_rule_channels(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_interval *c = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_mask *f = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
struct snd_interval ch;
snd_interval_any(&ch);
if (!(f->bits[0 ] & SNDRV_PCM_FMTBIT_S16_BE)) {
ch.min = 1 ;
ch.max = 1 ;
ch.integer = 1 ;
return snd_interval_refine(c, &ch);
}
return 0 ;
}
static int snd_dbri_open(struct snd_pcm_substream *substream)
{
struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
unsigned long flags;
dprintk(D_USR, "open audio output.\n" );
runtime->hw = snd_dbri_pcm_hw;
spin_lock_irqsave(&dbri->lock, flags);
info->substream = substream;
info->offset = 0 ;
info->dvma_buffer = 0 ;
info->pipe = -1 ;
spin_unlock_irqrestore(&dbri->lock, flags);
snd_pcm_hw_rule_add(runtime, 0 , SNDRV_PCM_HW_PARAM_CHANNELS,
snd_hw_rule_format, NULL, SNDRV_PCM_HW_PARAM_FORMAT,
-1 );
snd_pcm_hw_rule_add(runtime, 0 , SNDRV_PCM_HW_PARAM_FORMAT,
snd_hw_rule_channels, NULL,
SNDRV_PCM_HW_PARAM_CHANNELS,
-1 );
cs4215_open(dbri);
return 0 ;
}
static int snd_dbri_close(struct snd_pcm_substream *substream)
{
struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
dprintk(D_USR, "close audio output.\n" );
info->substream = NULL;
info->offset = 0 ;
return 0 ;
}
static int snd_dbri_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
int direction;
int ret;
/* set sampling rate, audio format and number of channels */
ret = cs4215_prepare(dbri, params_rate(hw_params),
params_format(hw_params),
params_channels(hw_params));
if (ret != 0 )
return ret;
/* hw_params can get called multiple times. Only map the DMA once.
*/
if (info->dvma_buffer == 0 ) {
if (DBRI_STREAMNO(substream) == DBRI_PLAY)
direction = DMA_TO_DEVICE;
else
direction = DMA_FROM_DEVICE;
info->dvma_buffer =
dma_map_single(&dbri->op->dev,
runtime->dma_area,
params_buffer_bytes(hw_params),
direction);
}
direction = params_buffer_bytes(hw_params);
dprintk(D_USR, "hw_params: %d bytes, dvma=%x\n" ,
direction, info->dvma_buffer);
return 0 ;
}
static int snd_dbri_hw_free(struct snd_pcm_substream *substream)
{
struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
int direction;
dprintk(D_USR, "hw_free.\n" );
/* hw_free can get called multiple times. Only unmap the DMA once.
*/
if (info->dvma_buffer) {
if (DBRI_STREAMNO(substream) == DBRI_PLAY)
direction = DMA_TO_DEVICE;
else
direction = DMA_FROM_DEVICE;
dma_unmap_single(&dbri->op->dev, info->dvma_buffer,
substream->runtime->buffer_size, direction);
info->dvma_buffer = 0 ;
}
if (info->pipe != -1 ) {
reset_pipe(dbri, info->pipe);
info->pipe = -1 ;
}
return 0 ;
}
static int snd_dbri_prepare(struct snd_pcm_substream *substream)
{
struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
int ret;
info->size = snd_pcm_lib_buffer_bytes(substream);
if (DBRI_STREAMNO(substream) == DBRI_PLAY)
info->pipe = 4 ; /* Send pipe */
else
info->pipe = 6 ; /* Receive pipe */
spin_lock_irq(&dbri->lock);
info->offset = 0 ;
/* Setup the all the transmit/receive descriptors to cover the
* whole DMA buffer .
*/
ret = setup_descs(dbri, DBRI_STREAMNO(substream),
snd_pcm_lib_period_bytes(substream));
spin_unlock_irq(&dbri->lock);
dprintk(D_USR, "prepare audio output. %d bytes\n" , info->size);
return ret;
}
static int snd_dbri_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
int ret = 0 ;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
dprintk(D_USR, "start audio, period is %d bytes\n" ,
(int )snd_pcm_lib_period_bytes(substream));
/* Re-submit the TDs. */
xmit_descs(dbri);
break ;
case SNDRV_PCM_TRIGGER_STOP:
dprintk(D_USR, "stop audio.\n" );
reset_pipe(dbri, info->pipe);
break ;
default :
ret = -EINVAL;
}
return ret;
}
static snd_pcm_uframes_t snd_dbri_pointer(struct snd_pcm_substream *substream)
{
struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
snd_pcm_uframes_t ret;
ret = bytes_to_frames(substream->runtime, info->offset)
% substream->runtime->buffer_size;
dprintk(D_USR, "I/O pointer: %ld frames of %ld.\n" ,
ret, substream->runtime->buffer_size);
return ret;
}
static const struct snd_pcm_ops snd_dbri_ops = {
.open = snd_dbri_open,
.close = snd_dbri_close,
.hw_params = snd_dbri_hw_params,
.hw_free = snd_dbri_hw_free,
.prepare = snd_dbri_prepare,
.trigger = snd_dbri_trigger,
.pointer = snd_dbri_pointer,
};
static int snd_dbri_pcm(struct snd_card *card)
{
struct snd_pcm *pcm;
int err;
err = snd_pcm_new(card,
/* ID */ "sun_dbri",
/* device */ 0,
/* playback count */ 1,
/* capture count */ 1, &pcm);
if (err < 0 )
return err;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_dbri_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_dbri_ops);
pcm->private_data = card->private_data;
pcm->info_flags = 0 ;
strscpy(pcm->name, card->shortname);
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
NULL, 64 * 1024 , 64 * 1024 );
return 0 ;
}
/*****************************************************************************
Mixer interface
*****************************************************************************/
static int snd_cs4215_info_volume(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2 ;
uinfo->value.integer.min = 0 ;
if (kcontrol->private_value == DBRI_PLAY)
uinfo->value.integer.max = DBRI_MAX_VOLUME;
else
uinfo->value.integer.max = DBRI_MAX_GAIN;
return 0 ;
}
static int snd_cs4215_get_volume(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol);
struct dbri_streaminfo *info;
if (snd_BUG_ON(!dbri))
return -EINVAL;
info = &dbri->stream_info[kcontrol->private_value];
ucontrol->value.integer.value[0 ] = info->left_gain;
ucontrol->value.integer.value[1 ] = info->right_gain;
return 0 ;
}
static int snd_cs4215_put_volume(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol);
struct dbri_streaminfo *info =
&dbri->stream_info[kcontrol->private_value];
unsigned int vol[2 ];
int changed = 0 ;
vol[0 ] = ucontrol->value.integer.value[0 ];
vol[1 ] = ucontrol->value.integer.value[1 ];
if (kcontrol->private_value == DBRI_PLAY) {
if (vol[0 ] > DBRI_MAX_VOLUME || vol[1 ] > DBRI_MAX_VOLUME)
return -EINVAL;
} else {
if (vol[0 ] > DBRI_MAX_GAIN || vol[1 ] > DBRI_MAX_GAIN)
return -EINVAL;
}
if (info->left_gain != vol[0 ]) {
info->left_gain = vol[0 ];
changed = 1 ;
}
if (info->right_gain != vol[1 ]) {
info->right_gain = vol[1 ];
changed = 1 ;
}
if (changed) {
/* First mute outputs, and wait 1/8000 sec (125 us)
* to make sure this takes . This avoids clicking noises .
*/
cs4215_setdata(dbri, 1 );
udelay(125 );
cs4215_setdata(dbri, 0 );
}
return changed;
}
static int snd_cs4215_info_single(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
int mask = (kcontrol->private_value >> 16 ) & 0 xff;
uinfo->type = (mask == 1 ) ?
SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1 ;
uinfo->value.integer.min = 0 ;
uinfo->value.integer.max = mask;
return 0 ;
}
static int snd_cs4215_get_single(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol);
int elem = kcontrol->private_value & 0 xff;
int shift = (kcontrol->private_value >> 8 ) & 0 xff;
int mask = (kcontrol->private_value >> 16 ) & 0 xff;
int invert = (kcontrol->private_value >> 24 ) & 1 ;
if (snd_BUG_ON(!dbri))
return -EINVAL;
if (elem < 4 )
ucontrol->value.integer.value[0 ] =
(dbri->mm.data[elem] >> shift) & mask;
else
ucontrol->value.integer.value[0 ] =
(dbri->mm.ctrl[elem - 4 ] >> shift) & mask;
if (invert == 1 )
ucontrol->value.integer.value[0 ] =
mask - ucontrol->value.integer.value[0 ];
return 0 ;
}
static int snd_cs4215_put_single(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol);
int elem = kcontrol->private_value & 0 xff;
int shift = (kcontrol->private_value >> 8 ) & 0 xff;
int mask = (kcontrol->private_value >> 16 ) & 0 xff;
int invert = (kcontrol->private_value >> 24 ) & 1 ;
int changed = 0 ;
unsigned short val;
if (snd_BUG_ON(!dbri))
return -EINVAL;
val = (ucontrol->value.integer.value[0 ] & mask);
if (invert == 1 )
val = mask - val;
val <<= shift;
if (elem < 4 ) {
dbri->mm.data[elem] = (dbri->mm.data[elem] &
~(mask << shift)) | val;
changed = (val != dbri->mm.data[elem]);
} else {
dbri->mm.ctrl[elem - 4 ] = (dbri->mm.ctrl[elem - 4 ] &
~(mask << shift)) | val;
changed = (val != dbri->mm.ctrl[elem - 4 ]);
}
dprintk(D_GEN, "put_single: mask=0x%x, changed=%d, "
"mixer-value=%ld, mm-value=0x%x\n" ,
mask, changed, ucontrol->value.integer.value[0 ],
dbri->mm.data[elem & 3 ]);
if (changed) {
/* First mute outputs, and wait 1/8000 sec (125 us)
* to make sure this takes . This avoids clicking noises .
*/
cs4215_setdata(dbri, 1 );
udelay(125 );
cs4215_setdata(dbri, 0 );
}
return changed;
}
/* Entries 0-3 map to the 4 data timeslots, entries 4-7 map to the 4 control
timeslots . Shift is the bit offset in the timeslot , mask defines the
number of bits . invert is a boolean for use with attenuation .
*/
#define CS4215_SINGLE(xname, entry, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
.info = snd_cs4215_info_single, \
.get = snd_cs4215_get_single, .put = snd_cs4215_put_single, \
.private_value = (entry) | ((shift) << 8 ) | ((mask) << 16 ) | \
((invert) << 24 ) },
static const struct snd_kcontrol_new dbri_controls[] = {
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Playback Volume" ,
.info = snd_cs4215_info_volume,
.get = snd_cs4215_get_volume,
.put = snd_cs4215_put_volume,
.private_value = DBRI_PLAY,
},
CS4215_SINGLE("Headphone switch" , 0 , 7 , 1 , 0 )
CS4215_SINGLE("Line out switch" , 0 , 6 , 1 , 0 )
CS4215_SINGLE("Speaker switch" , 1 , 6 , 1 , 0 )
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Capture Volume" ,
.info = snd_cs4215_info_volume,
.get = snd_cs4215_get_volume,
.put = snd_cs4215_put_volume,
.private_value = DBRI_REC,
},
/* FIXME: mic/line switch */
CS4215_SINGLE("Line in switch" , 2 , 4 , 1 , 0 )
CS4215_SINGLE("High Pass Filter switch" , 5 , 7 , 1 , 0 )
CS4215_SINGLE("Monitor Volume" , 3 , 4 , 0 xf, 1 )
CS4215_SINGLE("Mic boost" , 4 , 4 , 1 , 1 )
};
static int snd_dbri_mixer(struct snd_card *card)
{
int idx, err;
struct snd_dbri *dbri;
if (snd_BUG_ON(!card || !card->private_data))
return -EINVAL;
dbri = card->private_data;
strscpy(card->mixername, card->shortname);
for (idx = 0 ; idx < ARRAY_SIZE(dbri_controls); idx++) {
err = snd_ctl_add(card,
snd_ctl_new1(&dbri_controls[idx], dbri));
if (err < 0 )
return err;
}
for (idx = DBRI_REC; idx < DBRI_NO_STREAMS; idx++) {
dbri->stream_info[idx].left_gain = 0 ;
dbri->stream_info[idx].right_gain = 0 ;
}
return 0 ;
}
/****************************************************************************
/ proc interface
****************************************************************************/
static void dbri_regs_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_dbri *dbri = entry->private_data;
snd_iprintf(buffer, "REG0: 0x%x\n" , sbus_readl(dbri->regs + REG0));
snd_iprintf(buffer, "REG2: 0x%x\n" , sbus_readl(dbri->regs + REG2));
snd_iprintf(buffer, "REG8: 0x%x\n" , sbus_readl(dbri->regs + REG8));
snd_iprintf(buffer, "REG9: 0x%x\n" , sbus_readl(dbri->regs + REG9));
}
#ifdef DBRI_DEBUG
static void dbri_debug_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_dbri *dbri = entry->private_data;
int pipe;
snd_iprintf(buffer, "debug=%d\n" , dbri_debug);
for (pipe = 0 ; pipe < 32 ; pipe++) {
if (pipe_active(dbri, pipe)) {
struct dbri_pipe *pptr = &dbri->pipes[pipe];
snd_iprintf(buffer,
"Pipe %d: %s SDP=0x%x desc=%d, "
"len=%d next %d\n" ,
pipe,
(pptr->sdp & D_SDP_TO_SER) ? "output" :
"input" ,
pptr->sdp, pptr->desc,
pptr->length, pptr->nextpipe);
}
}
}
#endif
static void snd_dbri_proc(struct snd_card *card)
{
struct snd_dbri *dbri = card->private_data;
snd_card_ro_proc_new(card, "regs" , dbri, dbri_regs_read);
#ifdef DBRI_DEBUG
snd_card_ro_proc_new(card, "debug" , dbri, dbri_debug_read);
#endif
}
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * Initialization * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
static void snd_dbri_free(struct snd_dbri *dbri);
static int snd_dbri_create(struct snd_card *card,
struct platform_device *op,
int irq, int dev)
{
struct snd_dbri *dbri = card->private_data;
int err;
spin_lock_init(&dbri->lock);
dbri->op = op;
dbri->irq = irq;
dbri->dma = dma_alloc_coherent(&op->dev, sizeof (struct dbri_dma),
&dbri->dma_dvma, GFP_KERNEL);
if (!dbri->dma)
return -ENOMEM;
dprintk(D_GEN, "DMA Cmd Block 0x%p (%pad)\n" ,
dbri->dma, dbri->dma_dvma);
/* Map the registers into memory. */
dbri->regs_size = resource_size(&op->resource[0 ]);
dbri->regs = of_ioremap(&op->resource[0 ], 0 ,
dbri->regs_size, "DBRI Registers" );
if (!dbri->regs) {
printk(KERN_ERR "DBRI: could not allocate registers\n" );
dma_free_coherent(&op->dev, sizeof (struct dbri_dma),
(void *)dbri->dma, dbri->dma_dvma);
return -EIO;
}
err = request_irq(dbri->irq, snd_dbri_interrupt, IRQF_SHARED,
"DBRI audio" , dbri);
if (err) {
printk(KERN_ERR "DBRI: Can't get irq %d\n" , dbri->irq);
of_iounmap(&op->resource[0 ], dbri->regs, dbri->regs_size);
dma_free_coherent(&op->dev, sizeof (struct dbri_dma),
(void *)dbri->dma, dbri->dma_dvma);
return err;
}
/* Do low level initialization of the DBRI and CS4215 chips */
dbri_initialize(dbri);
err = cs4215_init(dbri);
if (err) {
snd_dbri_free(dbri);
return err;
}
return 0 ;
}
static void snd_dbri_free(struct snd_dbri *dbri)
{
dprintk(D_GEN, "snd_dbri_free\n" );
dbri_reset(dbri);
if (dbri->irq)
free_irq(dbri->irq, dbri);
if (dbri->regs)
of_iounmap(&dbri->op->resource[0 ], dbri->regs, dbri->regs_size);
if (dbri->dma)
dma_free_coherent(&dbri->op->dev,
sizeof (struct dbri_dma),
(void *)dbri->dma, dbri->dma_dvma);
}
static int dbri_probe(struct platform_device *op)
{
struct snd_dbri *dbri;
struct resource *rp;
struct snd_card *card;
static int dev;
int irq;
int err;
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev]) {
dev++;
return -ENOENT;
}
irq = op->archdata.irqs[0 ];
if (irq <= 0 ) {
printk(KERN_ERR "DBRI-%d: No IRQ.\n" , dev);
return -ENODEV;
}
err = snd_card_new(&op->dev, index[dev], id[dev], THIS_MODULE,
sizeof (struct snd_dbri), &card);
if (err < 0 )
return err;
strscpy(card->driver, "DBRI" );
strscpy(card->shortname, "Sun DBRI" );
rp = &op->resource[0 ];
sprintf(card->longname, "%s at 0x%02lx:0x%016llx, irq %d" ,
card->shortname,
rp->flags & 0 xffL, (unsigned long long )rp->start, irq);
err = snd_dbri_create(card, op, irq, dev);
if (err < 0 ) {
snd_card_free(card);
return err;
}
dbri = card->private_data;
err = snd_dbri_pcm(card);
if (err < 0 )
goto _err;
err = snd_dbri_mixer(card);
if (err < 0 )
goto _err;
/* /proc file handling */
snd_dbri_proc(card);
dev_set_drvdata(&op->dev, card);
err = snd_card_register(card);
if (err < 0 )
goto _err;
printk(KERN_INFO "audio%d at %p (irq %d) is DBRI(%c)+CS4215(%d)\n" ,
dev, dbri->regs,
dbri->irq, op->dev.of_node->name[9 ], dbri->mm.version);
dev++;
return 0 ;
_err:
snd_dbri_free(dbri);
snd_card_free(card);
return err;
}
static void dbri_remove(struct platform_device *op)
{
struct snd_card *card = dev_get_drvdata(&op->dev);
snd_dbri_free(card->private_data);
snd_card_free(card);
}
static const struct of_device_id dbri_match[] = {
{
.name = "SUNW,DBRIe" ,
},
{
.name = "SUNW,DBRIf" ,
},
{},
};
MODULE_DEVICE_TABLE(of, dbri_match);
static struct platform_driver dbri_sbus_driver = {
.driver = {
.name = "dbri" ,
.of_match_table = dbri_match,
},
.probe = dbri_probe,
.remove = dbri_remove,
};
module_platform_driver(dbri_sbus_driver);
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