diff options
Diffstat (limited to 'sound/sparc/dbri.c')
| -rw-r--r-- | sound/sparc/dbri.c | 2690 |
1 files changed, 2690 insertions, 0 deletions
diff --git a/sound/sparc/dbri.c b/sound/sparc/dbri.c new file mode 100644 index 000000000..3881e1c1b --- /dev/null +++ b/sound/sparc/dbri.c @@ -0,0 +1,2690 @@ +// 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 4000SBus 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 <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/of_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 0xfcbf /* 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 0xf /* 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 0x00 /* Status and Control */ +#define REG1 0x04 /* Mode and Interrupt */ +#define REG2 0x08 /* Parallel IO */ +#define REG3 0x0c /* Test */ +#define REG8 0x20 /* Command Queue Pointer */ +#define REG9 0x24 /* 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 (0xf0) /* 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 0x0 /* Stop execution */ +#define D_PAUSE 0x1 /* Flush long pipes */ +#define D_JUMP 0x2 /* New command queue */ +#define D_IIQ 0x3 /* Initialize Interrupt Queue */ +#define D_REX 0x4 /* Report command execution via interrupt */ +#define D_SDP 0x5 /* Setup Data Pipe */ +#define D_CDP 0x6 /* Continue Data Pipe (reread NULL Pointer) */ +#define D_DTS 0x7 /* Define Time Slot */ +#define D_SSP 0x8 /* Set short Data Pipe */ +#define D_CHI 0x9 /* Set CHI Global Mode */ +#define D_NT 0xa /* NT Command */ +#define D_TE 0xb /* TE Command */ +#define D_CDEC 0xc /* Codec setup */ +#define D_TEST 0xd /* No comment */ +#define D_CDM 0xe /* 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 0x5 /* Toggle ROM opcode monitor on/off */ +#define D_TEST_PROC 0x6 /* Microprocessor test */ +#define D_TEST_SER 0x7 /* Serial-Controller test */ +#define D_TEST_RAMREAD 0x8 /* Copy from Ram to system memory */ +#define D_TEST_RAMWRITE 0x9 /* Copy into Ram from system memory */ +#define D_TEST_RAMBIST 0xa /* RAM Built-In Self Test */ +#define D_TEST_MCBIST 0xb /* Microcontroller Built-In Self Test */ +#define D_TEST_DUMP 0xe /* 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) & 0x3f) +#define D_INTR_GETCODE(v) (((v) >> 20) & 0xf) +#define D_INTR_GETCMD(v) (((v) >> 16) & 0xf) +#define D_INTR_GETVAL(v) ((v) & 0xffff) +#define D_INTR_GETRVAL(v) ((v) & 0xfffff) + +#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) & 0xff) /* 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) & 0xff) /* Receive status */ +#define DBRI_RD_CNT(v) (((v) >> 16) & 0x1fff) /* 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 & 0xffff0000) >> 16) | ((b & 0x0000ffff) << 16); + fallthrough; + case 16: + b = ((b & 0xff00ff00) >> 8) | ((b & 0x00ff00ff) << 8); + fallthrough; + case 8: + b = ((b & 0xf0f0f0f0) >> 4) | ((b & 0x0f0f0f0f) << 4); + fallthrough; + case 4: + b = ((b & 0xcccccccc) >> 2) | ((b & 0x33333333) << 2); + fallthrough; + case 2: + b = ((b & 0xaaaaaaaa) >> 1) | ((b & 0x55555555) << 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 &= 0xffff; /* 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 & 0xf800) != 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(0x20) | CS4215_HE | CS4215_LE; + mm->data[1] = CS4215_RO(0x20) | CS4215_SE; + mm->data[2] = CS4215_LG(0x8) | CS4215_IS | CS4215_PIO0 | CS4215_PIO1; + mm->data[3] = CS4215_RG(0x8) | CS4215_MA(0xf); + + /* + * Control Time Slot 1-4 + * 0: Default I/O voltage scale + * 1: 8 bit ulaw, 8kHz, 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 = 0xff; + 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 & 0x3f; + int right_gain = info->right_gain & 0x3f; + + dbri->mm.data[0] &= ~0x3f; /* Reset the volume bits */ + dbri->mm.data[1] &= ~0x3f; + 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 & 0xf; + right_gain = info->right_gain & 0xf; + 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 & 0xe4) != 0x20); --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 == 0xff) { + 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; + strcpy(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) & 0xff; + + 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 & 0xff; + int shift = (kcontrol->private_value >> 8) & 0xff; + int mask = (kcontrol->private_value >> 16) & 0xff; + 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 & 0xff; + int shift = (kcontrol->private_value >> 8) & 0xff; + int mask = (kcontrol->private_value >> 16) & 0xff; + 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, 0xf, 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; + + strcpy(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; + + strcpy(card->driver, "DBRI"); + strcpy(card->shortname, "Sun DBRI"); + rp = &op->resource[0]; + sprintf(card->longname, "%s at 0x%02lx:0x%016Lx, irq %d", + card->shortname, + rp->flags & 0xffL, (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 int 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); + + return 0; +} + +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); |