dbri.c
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- /* $Id: dbri.c,v 1.27 2001/10/08 22:19:50 davem Exp $
- * drivers/sbus/audio/dbri.c
- *
- * Copyright (C) 1997 Rudolf Koenig (rfkoenig@immd4.informatik.uni-erlangen.de)
- * Copyright (C) 1998, 1999 Brent Baccala (baccala@freesoft.org)
- *
- * This is the lowlevel 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) Tranceiver" 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 (formarly AT&T microelectronics) home
- * page.
- * - http://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, nr 0-15) or between two serial
- * devices (short pipes, nr 16-31), or simply send a fixed data to a serial
- * device (short pipes).
- * A timeslot defines the bit-offset and nr 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, balance, output selection) timemultiplexed 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 onboard
- * & the speakerbox codec simultanously, 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.
- */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/interrupt.h>
- #include <linux/slab.h>
- #include <linux/version.h>
- #include <linux/delay.h>
- #include <asm/openprom.h>
- #include <asm/oplib.h>
- #include <asm/system.h>
- #include <asm/irq.h>
- #include <asm/io.h>
- #include <asm/sbus.h>
- #include <asm/pgtable.h>
- #include <asm/audioio.h>
- #include "dbri.h"
- #if defined(DBRI_ISDN)
- #include "../../isdn/hisax/hisax.h"
- #include "../../isdn/hisax/isdnl1.h"
- #include "../../isdn/hisax/foreign.h"
- #endif
- #define DBRI_DEBUG
- #ifdef DBRI_DEBUG
- #define dprintk(a, x) if(dbri_debug & a) printk x
- #define D_GEN (1<<0)
- #define D_INT (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 = 0;
- MODULE_PARM(dbri_debug, "i");
- static int dbri_trace = 0;
- MODULE_PARM(dbri_trace, "i");
- #define tprintk(x) if(dbri_trace) printk x
- static char *cmds[] = {
- "WAIT", "PAUSE", "JUMP", "IIQ", "REX", "SDP", "CDP", "DTS",
- "SSP", "CHI", "NT", "TE", "CDEC", "TEST", "CDM", "RESRV"
- };
- #define DBRI_CMD(cmd, intr, value) ((cmd << 28) | (1 << 27) | value)
- #else
- #define dprintk(a, x)
- #define DBRI_CMD(cmd, intr, value) ((cmd << 28) | (intr << 27) | value)
- #endif /* DBRI_DEBUG */
- #define MAX_DRIVERS 2 /* Increase this if need more than 2 DBRI's */
- static struct sparcaudio_driver drivers[MAX_DRIVERS];
- static int num_drivers = 0;
- /*
- ****************************************************************************
- ************** 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 can generate a
- CPU interrupt if required.
- Since the DBRI can run in parallel with the CPU, several means of
- synchronization present themselves. The original scheme (Rudolf's)
- was to set a flag when we "cmdlock"ed the DBRI, clear the flag when
- an interrupt signaled completion, and wait on a wait_queue if a routine
- attempted to cmdlock while the flag was set. The problems arose when
- we tried to cmdlock from inside an interrupt handler, which might
- cause scheduling in an interrupt (if we waited), etc, etc
- A more sophisticated scheme might involve a circular command buffer
- or an array of command buffers. A routine could fill one with
- commands and link it onto a list. When a interrupt signaled
- completion of the current command buffer, look on the list for
- the next one.
- I've decided to implement something much simpler - after each command,
- the CPU waits for the DBRI to finish the command by polling the P bit
- in DBRI register 0. I've tried to implement this in such a way
- that might make implementing a more sophisticated scheme easier.
- Every time a routine wants to write commands to the DBRI, it must
- first call dbri_cmdlock() and get an initial pointer into dbri->dma->cmd
- in return. After the commands have been writen, dbri_cmdsend() is
- called with the final pointer value.
- Something a little more clever is required if this code is ever run
- on an SMP machine.
- */
- static int dbri_locked = 0;
- static volatile s32 *dbri_cmdlock(struct dbri *dbri)
- {
- if (dbri_locked)
- printk("DBRI: Command buffer locked! (bug in driver)n");
- dbri_locked++;
- return &dbri->dma->cmd[0];
- }
- static void dbri_process_interrupt_buffer(struct dbri *);
- static void dbri_cmdsend(struct dbri *dbri, volatile s32 *cmd)
- {
- int MAXLOOPS = 1000000;
- int maxloops = MAXLOOPS;
- unsigned long flags;
- volatile s32 *ptr;
- for (ptr = &dbri->dma->cmd[0]; ptr < cmd; ptr++) {
- dprintk(D_CMD, ("DBRI cmd: %lx:%08xn",
- (unsigned long) ptr, *ptr));
- }
- save_and_cli(flags);
- dbri_locked--;
- if (dbri_locked != 0) {
- printk("DBRI: Command buffer improperly locked! (bug in driver)n");
- } else if ((cmd - &dbri->dma->cmd[0]) >= DBRI_NO_CMDS-1) {
- printk("DBRI: Command buffer overflow! (bug in driver)n");
- } else {
- *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0);
- *(cmd++) = DBRI_CMD(D_WAIT, 1, 0);
- dbri->wait_seen = 0;
- sbus_writel(dbri->dma_dvma, dbri->regs + REG8);
- while ((--maxloops) > 0 &&
- (sbus_readl(dbri->regs + REG0) & D_P))
- barrier();
- if (maxloops == 0) {
- printk("DBRI: Chip never completed command buffern");
- } else {
- while ((--maxloops) > 0 && (! dbri->wait_seen))
- dbri_process_interrupt_buffer(dbri);
- if (maxloops == 0) {
- printk("DBRI: Chip never acked WAITn");
- } else {
- dprintk(D_INT, ("DBRI: Chip completed command "
- "buffer (%d)n",
- MAXLOOPS - maxloops));
- }
- }
- }
- restore_flags(flags);
- }
- static void dbri_reset(struct dbri *dbri)
- {
- int i;
- dprintk(D_GEN, ("DBRI: reset 0:%x 2:%x 8:%x 9:%xn",
- 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);
- }
- static void dbri_detach(struct dbri *dbri)
- {
- dbri_reset(dbri);
- free_irq(dbri->irq, dbri);
- sbus_iounmap(dbri->regs, dbri->regs_size);
- sbus_free_consistent(dbri->sdev, sizeof(struct dbri_dma),
- (void *)dbri->dma, dbri->dma_dvma);
- kfree(dbri);
- }
- static void dbri_initialize(struct dbri *dbri)
- {
- volatile s32 *cmd;
- u32 dma_addr, tmp;
- int n;
- dbri_reset(dbri);
- dprintk(D_GEN, ("DBRI: init: cmd: %p, int: %pn",
- &dbri->dma->cmd[0], &dbri->dma->intr[0]));
- /*
- * Initialize the interrupt ringbuffer.
- */
- for(n = 0; n < DBRI_NO_INTS-1; n++) {
- dma_addr = dbri->dma_dvma;
- dma_addr += dbri_dma_off(intr, ((n+1) & DBRI_INT_BLK));
- dbri->dma->intr[n * DBRI_INT_BLK] = dma_addr;
- }
- dma_addr = dbri->dma_dvma + dbri_dma_off(intr, 0);
- dbri->dma->intr[n * DBRI_INT_BLK] = dma_addr;
- dbri->dbri_irqp = 1;
- /* We should query the openprom to see what burst sizes this
- * SBus supports. For now, just disable all SBus bursts */
- tmp = sbus_readl(dbri->regs + REG0);
- tmp &= ~(D_G | D_S | D_E);
- sbus_writel(tmp, dbri->regs + REG0);
- /*
- * Set up the interrupt queue
- */
- cmd = dbri_cmdlock(dbri);
- dma_addr = dbri->dma_dvma + dbri_dma_off(intr, 0);
- *(cmd++) = DBRI_CMD(D_IIQ, 0, 0);
- *(cmd++) = dma_addr;
- dbri_cmdsend(dbri, cmd);
- }
- /*
- ****************************************************************************
- *************************** 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. This function is used by dbri_cmdsend()
- to make sure we're synced up with the chip after each command sequence,
- even if we're running cli'ed.
- */
- /*
- * 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);
- case 16:
- b = ((b & 0xff00ff00) >> 8) | ((b & 0x00ff00ff) << 8);
- case 8:
- b = ((b & 0xf0f0f0f0) >> 4) | ((b & 0x0f0f0f0f) << 4);
- case 4:
- b = ((b & 0xcccccccc) >> 2) | ((b & 0x33333333) << 2);
- case 2:
- b = ((b & 0xaaaaaaaa) >> 1) | ((b & 0x55555555) << 1);
- case 1:
- case 0:
- break;
- default:
- printk("DBRI reverse_bytes: unsupported lengthn");
- };
- return b;
- }
- /* 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, releasing
- * each one's DMA buffer (if present), flagging the descriptor available,
- * and signaling its callback routine (if present), before proceeding
- * to the next one. Stops when the first descriptor is found without
- * TBC (Transmit Buffer Complete) set, or we've run through them all.
- */
- static void transmission_complete_intr(struct dbri *dbri, int pipe)
- {
- int td;
- int status;
- void *buffer;
- void (*callback)(void *, int);
- void *callback_arg;
- td = dbri->pipes[pipe].desc;
- while (td >= 0) {
- if (td >= DBRI_NO_DESCS) {
- printk("DBRI: invalid td on pipe %dn", pipe);
- return;
- }
- status = DBRI_TD_STATUS(dbri->dma->desc[td].word4);
- if (! (status & DBRI_TD_TBC)) {
- break;
- }
- dprintk(D_INT, ("DBRI: TD %d, status 0x%02xn", td, status));
- buffer = dbri->descs[td].buffer;
- if (buffer)
- sbus_unmap_single(dbri->sdev,
- dbri->descs[td].buffer_dvma,
- dbri->descs[td].len,
- SBUS_DMA_TODEVICE);
- callback = dbri->descs[td].output_callback;
- callback_arg = dbri->descs[td].output_callback_arg;
- dbri->descs[td].inuse = 0;
- td = dbri->descs[td].next;
- dbri->pipes[pipe].desc = td;
- if (callback != NULL)
- callback(callback_arg, status & 0xe);
- }
- }
- static void reception_complete_intr(struct dbri *dbri, int pipe)
- {
- int rd = dbri->pipes[pipe].desc;
- s32 status;
- void *buffer;
- void (*callback)(void *, int, unsigned int);
- if (rd < 0 || rd >= DBRI_NO_DESCS) {
- printk("DBRI: invalid rd on pipe %dn", pipe);
- return;
- }
- dbri->descs[rd].inuse = 0;
- dbri->pipes[pipe].desc = dbri->descs[rd].next;
- status = dbri->dma->desc[rd].word1;
- buffer = dbri->descs[rd].buffer;
- if (buffer)
- sbus_unmap_single(dbri->sdev,
- dbri->descs[rd].buffer_dvma,
- dbri->descs[rd].len,
- SBUS_DMA_FROMDEVICE);
- callback = dbri->descs[rd].input_callback;
- if (callback != NULL)
- callback(dbri->descs[rd].input_callback_arg,
- DBRI_RD_STATUS(status),
- DBRI_RD_CNT(status)-2);
- dprintk(D_INT, ("DBRI: Recv RD %d, status 0x%02x, len %dn",
- rd, DBRI_RD_STATUS(status), DBRI_RD_CNT(status)));
- }
- static void dbri_process_one_interrupt(struct 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);
- int rval = D_INTR_GETRVAL(x);
- if (channel == D_INTR_CMD) {
- dprintk(D_INT,("DBRI: INTR: Command: %-5s Value:%dn",
- cmds[command], val));
- } else {
- dprintk(D_INT,("DBRI: INTR: Chan:%d Code:%d Val:%#xn",
- channel, code, rval));
- }
- if (channel == D_INTR_CMD && command == D_WAIT)
- dbri->wait_seen++;
- if (code == D_INTR_SBRI) {
- /* SBRI - BRI status change */
- const int liu_states[] = {1, 0, 8, 3, 4, 5, 6, 7};
- dbri->liu_state = liu_states[val & 0x7];
- if (dbri->liu_callback)
- dbri->liu_callback(dbri->liu_callback_arg);
- }
- if (code == D_INTR_BRDY)
- reception_complete_intr(dbri, channel);
- if (code == D_INTR_XCMP)
- transmission_complete_intr(dbri, channel);
- if (code == D_INTR_UNDR) {
- /* UNDR - Transmission underrun
- * resend SDP command with clear pipe bit (C) set
- */
- volatile s32 *cmd;
- int pipe = channel;
- int td = dbri->pipes[pipe].desc;
- dbri->dma->desc[td].word4 = 0;
- cmd = dbri_cmdlock(dbri);
- *(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);
- }
- if (code == 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;
- }
- }
- /* 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. This
- * order is important since we might recurse back into this function
- * and need to make sure the pointer has been advanced first.
- */
- static void dbri_process_interrupt_buffer(struct 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_NO_INTS * DBRI_INT_BLK))
- dbri->dbri_irqp = 1;
- else if ((dbri->dbri_irqp & (DBRI_INT_BLK-1)) == 0)
- dbri->dbri_irqp++;
- tprintk(("dbri->dbri_irqp == %dn", dbri->dbri_irqp));
- dbri_process_one_interrupt(dbri, x);
- }
- }
- static void dbri_intr(int irq, void *opaque, struct pt_regs *regs)
- {
- struct dbri *dbri = (struct dbri *) opaque;
- int x;
-
- /*
- * Read it, so the interrupt goes away.
- */
- x = sbus_readl(dbri->regs + REG1);
- dprintk(D_INT, ("DBRI: Interrupt! (reg1=0x%08x)n", x));
- if (x & (D_MRR|D_MLE|D_LBG|D_MBE)) {
- u32 tmp;
- if(x & D_MRR) printk("DBRI: Multiple Error Ack on SBusn");
- if(x & D_MLE) printk("DBRI: Multiple Late Error on SBusn");
- if(x & D_LBG) printk("DBRI: Lost Bus Grant on SBusn");
- if(x & D_MBE) printk("DBRI: Burst Error on SBusn");
- /* 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 should probably reset
- * and re-init the chip.
- */
- tmp = sbus_readl(dbri->regs + REG0);
- tmp &= ~(D_D);
- sbus_writel(tmp, dbri->regs + REG0);
- }
- #if 0
- if (!(x & D_IR)) /* Not for us */
- return;
- #endif
- dbri_process_interrupt_buffer(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 int pipe_active(struct dbri *dbri, int pipe)
- {
- return (dbri->pipes[pipe].desc != -1);
- }
- /* reset_pipe(dbri, pipe)
- *
- * Called on an in-use pipe to clear anything being transmitted or received
- */
- static void reset_pipe(struct dbri *dbri, int pipe)
- {
- int sdp;
- int desc;
- volatile int *cmd;
- if (pipe < 0 || pipe > 31) {
- printk("DBRI: reset_pipe called with illegal pipe numbern");
- return;
- }
- sdp = dbri->pipes[pipe].sdp;
- if (sdp == 0) {
- printk("DBRI: reset_pipe called on uninitialized pipen");
- return;
- }
- cmd = dbri_cmdlock(dbri);
- *(cmd++) = DBRI_CMD(D_SDP, 0, sdp | D_SDP_C | D_SDP_P);
- *(cmd++) = 0;
- dbri_cmdsend(dbri, cmd);
- desc = dbri->pipes[pipe].desc;
- while (desc != -1) {
- void *buffer = dbri->descs[desc].buffer;
- void (*output_callback) (void *, int)
- = dbri->descs[desc].output_callback;
- void *output_callback_arg
- = dbri->descs[desc].output_callback_arg;
- void (*input_callback) (void *, int, unsigned int)
- = dbri->descs[desc].input_callback;
- void *input_callback_arg
- = dbri->descs[desc].input_callback_arg;
- if (buffer)
- sbus_unmap_single(dbri->sdev,
- dbri->descs[desc].buffer_dvma,
- dbri->descs[desc].len,
- output_callback != NULL ? SBUS_DMA_TODEVICE
- : SBUS_DMA_FROMDEVICE);
- dbri->descs[desc].inuse = 0;
- desc = dbri->descs[desc].next;
- if (output_callback)
- output_callback(output_callback_arg, -1);
- if (input_callback)
- input_callback(input_callback_arg, -1, 0);
- }
- dbri->pipes[pipe].desc = -1;
- }
- static void setup_pipe(struct dbri *dbri, int pipe, int sdp)
- {
- if (pipe < 0 || pipe > 31) {
- printk("DBRI: setup_pipe called with illegal pipe numbern");
- return;
- }
- if ((sdp & 0xf800) != sdp) {
- printk("DBRI: setup_pipe called with strange SDP valuen");
- /* 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;
- reset_pipe(dbri, pipe);
- }
- static void link_time_slot(struct dbri *dbri, int pipe,
- enum in_or_out direction, int basepipe,
- int length, int cycle)
- {
- volatile s32 *cmd;
- int val;
- int prevpipe;
- int nextpipe;
- if (pipe < 0 || pipe > 31 || basepipe < 0 || basepipe > 31) {
- printk("DBRI: link_time_slot called with illegal pipe numbern");
- return;
- }
- if (dbri->pipes[pipe].sdp == 0 || dbri->pipes[basepipe].sdp == 0) {
- printk("DBRI: link_time_slot called on uninitialized pipen");
- return;
- }
- /* 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 (basepipe == 16 && direction == PIPEoutput && cycle == 0)
- cycle = dbri->chi_bpf;
- if (basepipe == pipe) {
- prevpipe = pipe;
- nextpipe = pipe;
- } else {
- /* We're not initializing a new linked list (basepipe != pipe),
- * so run through the linked list and find where this pipe
- * should be sloted in, based on its cycle. CHI confuses
- * things a bit, since it has a single anchor for both its
- * transmit and receive lists.
- */
- if (basepipe == 16) {
- if (direction == PIPEinput) {
- prevpipe = dbri->chi_in_pipe;
- } else {
- prevpipe = dbri->chi_out_pipe;
- }
- } else {
- prevpipe = basepipe;
- }
- nextpipe = dbri->pipes[prevpipe].nextpipe;
- while (dbri->pipes[nextpipe].cycle < cycle
- && dbri->pipes[nextpipe].nextpipe != basepipe) {
- prevpipe = nextpipe;
- nextpipe = dbri->pipes[nextpipe].nextpipe;
- }
- }
- if (prevpipe == 16) {
- if (direction == PIPEinput) {
- dbri->chi_in_pipe = pipe;
- } else {
- dbri->chi_out_pipe = pipe;
- }
- } else {
- dbri->pipes[prevpipe].nextpipe = pipe;
- }
- dbri->pipes[pipe].nextpipe = nextpipe;
- dbri->pipes[pipe].cycle = cycle;
- dbri->pipes[pipe].length = length;
- cmd = dbri_cmdlock(dbri);
- if (direction == PIPEinput) {
- 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;
- } else {
- 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);
- }
- dbri_cmdsend(dbri, cmd);
- }
- /* I don't use this function, so it's basically untested. */
- static void unlink_time_slot(struct dbri *dbri, int pipe,
- enum in_or_out direction, int prevpipe,
- int nextpipe)
- {
- volatile s32 *cmd;
- int val;
- if (pipe < 0 || pipe > 31 || prevpipe < 0 || prevpipe > 31) {
- printk("DBRI: unlink_time_slot called with illegal pipe numbern");
- return;
- }
- cmd = dbri_cmdlock(dbri);
- 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);
- }
- dbri_cmdsend(dbri, cmd);
- }
- /* 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()
- */
- static void xmit_fixed(struct dbri *dbri, int pipe, unsigned int data)
- {
- volatile s32 *cmd;
- if (pipe < 16 || pipe > 31) {
- printk("DBRI: xmit_fixed: Illegal pipe numbern");
- return;
- }
- if (D_SDP_MODE(dbri->pipes[pipe].sdp) == 0) {
- printk("DBRI: xmit_fixed: Uninitialized pipe %dn", pipe);
- return;
- }
- if (D_SDP_MODE(dbri->pipes[pipe].sdp) != D_SDP_FIXED) {
- printk("DBRI: xmit_fixed: Non-fixed pipe %dn", pipe);
- return;
- }
- if (! (dbri->pipes[pipe].sdp & D_SDP_TO_SER)) {
- printk("DBRI: xmit_fixed: Called on receive pipe %dn", 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);
- *(cmd++) = DBRI_CMD(D_SSP, 0, pipe);
- *(cmd++) = data;
- dbri_cmdsend(dbri, cmd);
- }
- static void recv_fixed(struct dbri *dbri, int pipe, volatile __u32 *ptr)
- {
- if (pipe < 16 || pipe > 31) {
- printk("DBRI: recv_fixed called with illegal pipe numbern");
- return;
- }
- if (D_SDP_MODE(dbri->pipes[pipe].sdp) != D_SDP_FIXED) {
- printk("DBRI: recv_fixed called on non-fixed pipe %dn", pipe);
- return;
- }
- if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) {
- printk("DBRI: recv_fixed called on transmit pipe %dn", pipe);
- return;
- }
- dbri->pipes[pipe].recv_fixed_ptr = ptr;
- }
- /* xmit_on_pipe() / recv_on_pipe()
- *
- * 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.
- *
- * Both functions take pointer/len arguments pointing to a data buffer,
- * and both provide callback functions (may be NULL) to notify higher
- * level code when transmission/reception is complete.
- *
- * Both work by building chains of descriptors which identify the
- * data buffers. Buffers too large for a single descriptor will
- * be spread across multiple descriptors.
- */
- static void xmit_on_pipe(struct dbri *dbri, int pipe,
- void * buffer, unsigned int len,
- void (*callback)(void *, int), void * callback_arg)
- {
- volatile s32 *cmd;
- unsigned long flags;
- int td = 0;
- int first_td = -1;
- int last_td = -1;
- __u32 dvma_buffer, dvma_buffer_base;
- if (pipe < 0 || pipe > 15) {
- printk("DBRI: xmit_on_pipe: Illegal pipe numbern");
- return;
- }
- if (dbri->pipes[pipe].sdp == 0) {
- printk("DBRI: xmit_on_pipe: Uninitialized pipe %dn", pipe);
- return;
- }
- if (! (dbri->pipes[pipe].sdp & D_SDP_TO_SER)) {
- printk("DBRI: xmit_on_pipe: Called on receive pipe %dn",
- pipe);
- return;
- }
- dvma_buffer_base = dvma_buffer = sbus_map_single(dbri->sdev, buffer, len,
- SBUS_DMA_TODEVICE);
- while (len > 0) {
- int mylen;
- for (; td < DBRI_NO_DESCS; td ++) {
- if (! dbri->descs[td].inuse)
- break;
- }
- if (td == DBRI_NO_DESCS) {
- printk("DBRI: xmit_on_pipe: No descriptorsn");
- break;
- }
- if (len > ((1 << 13) - 1)) {
- mylen = (1 << 13) - 1;
- } else {
- mylen = len;
- }
- dbri->descs[td].inuse = 1;
- dbri->descs[td].next = -1;
- dbri->descs[td].buffer = NULL;
- dbri->descs[td].output_callback = NULL;
- dbri->descs[td].input_callback = NULL;
- dbri->dma->desc[td].word1 = DBRI_TD_CNT(mylen);
- dbri->dma->desc[td].ba = dvma_buffer;
- dbri->dma->desc[td].nda = 0;
- dbri->dma->desc[td].word4 = 0;
- if (first_td == -1) {
- first_td = td;
- } else {
- dbri->descs[last_td].next = td;
- dbri->dma->desc[last_td].nda =
- dbri->dma_dvma + dbri_dma_off(desc, td);
- }
- last_td = td;
- dvma_buffer += mylen;
- len -= mylen;
- }
- if (first_td == -1 || last_td == -1) {
- sbus_unmap_single(dbri->sdev, dvma_buffer_base,
- dvma_buffer - dvma_buffer_base + len,
- SBUS_DMA_TODEVICE);
- return;
- }
- dbri->dma->desc[last_td].word1 |= DBRI_TD_I | DBRI_TD_F | DBRI_TD_B;
- dbri->descs[last_td].buffer = buffer;
- dbri->descs[last_td].buffer_dvma = dvma_buffer_base;
- dbri->descs[last_td].len = dvma_buffer - dvma_buffer_base + len;
- dbri->descs[last_td].output_callback = callback;
- dbri->descs[last_td].output_callback_arg = callback_arg;
- for (td=first_td; td != -1; td = dbri->descs[td].next) {
- dprintk(D_DESC, ("DBRI TD %d: %08x %08x %08x %08xn",
- td,
- dbri->dma->desc[td].word1,
- dbri->dma->desc[td].ba,
- dbri->dma->desc[td].nda,
- dbri->dma->desc[td].word4));
- }
- save_and_cli(flags);
- if (pipe_active(dbri, pipe)) {
- /* Pipe is already active - find last TD in use
- * and link our first TD onto its end. Then issue
- * a CDP command to let the DBRI know there's more data.
- */
- last_td = dbri->pipes[pipe].desc;
- while (dbri->descs[last_td].next != -1)
- last_td = dbri->descs[last_td].next;
- dbri->descs[last_td].next = first_td;
- dbri->dma->desc[last_td].nda =
- dbri->dma_dvma + dbri_dma_off(desc, first_td);
- cmd = dbri_cmdlock(dbri);
- *(cmd++) = DBRI_CMD(D_CDP, 0, pipe);
- dbri_cmdsend(dbri,cmd);
- } else {
- /* Pipe isn't active - issue an SDP command to start
- * our chain of TDs running.
- */
- dbri->pipes[pipe].desc = first_td;
- cmd = dbri_cmdlock(dbri);
- *(cmd++) = DBRI_CMD(D_SDP, 0,
- dbri->pipes[pipe].sdp
- | D_SDP_P | D_SDP_EVERY | D_SDP_C);
- *(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, first_td);
- dbri_cmdsend(dbri, cmd);
- }
- restore_flags(flags);
- }
- static void recv_on_pipe(struct dbri *dbri, int pipe,
- void * buffer, unsigned int len,
- void (*callback)(void *, int, unsigned int),
- void * callback_arg)
- {
- volatile s32 *cmd;
- int first_rd = -1;
- int last_rd = -1;
- int rd;
- __u32 bus_buffer, bus_buffer_base;
- if (pipe < 0 || pipe > 15) {
- printk("DBRI: recv_on_pipe: Illegal pipe numbern");
- return;
- }
- if (dbri->pipes[pipe].sdp == 0) {
- printk("DBRI: recv_on_pipe: Uninitialized pipe %dn", pipe);
- return;
- }
- if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) {
- printk("DBRI: recv_on_pipe: Called on transmit pipe %dn",
- pipe);
- return;
- }
- /* XXX Fix this XXX
- * Should be able to queue multiple buffers to receive on a pipe
- */
- if (dbri->pipes[pipe].desc != -1) {
- printk("DBRI: recv_on_pipe: Called on active pipe %dn", pipe);
- return;
- }
- /* Make sure buffer size is multiple of four */
- len &= ~3;
- bus_buffer_base = bus_buffer = sbus_map_single(dbri->sdev, buffer, len,
- SBUS_DMA_FROMDEVICE);
- while (len > 0) {
- int rd, mylen;
- if (len > ((1 << 13) - 4)) {
- mylen = (1 << 13) - 4;
- } else {
- mylen = len;
- }
- for (rd = 0; rd < DBRI_NO_DESCS; rd ++) {
- if (! dbri->descs[rd].inuse)
- break;
- }
- if (rd == DBRI_NO_DESCS) {
- printk("DBRI recv_on_pipe: No descriptorsn");
- break;
- }
- dbri->dma->desc[rd].word1 = 0;
- dbri->dma->desc[rd].ba = bus_buffer;
- dbri->dma->desc[rd].nda = 0;
- dbri->dma->desc[rd].word4 = DBRI_RD_B | DBRI_RD_BCNT(mylen);
- dbri->descs[rd].buffer = NULL;
- dbri->descs[rd].len = 0;
- dbri->descs[rd].input_callback = NULL;
- dbri->descs[rd].output_callback = NULL;
- dbri->descs[rd].next = -1;
- dbri->descs[rd].inuse = 1;
- if (first_rd == -1) first_rd = rd;
- if (last_rd != -1) {
- dbri->dma->desc[last_rd].nda =
- dbri->dma_dvma + dbri_dma_off(desc, rd);
- dbri->descs[last_rd].next = rd;
- }
- last_rd = rd;
- bus_buffer += mylen;
- len -= mylen;
- }
- if (last_rd == -1 || first_rd == -1) {
- sbus_unmap_single(dbri->sdev, bus_buffer_base,
- bus_buffer - bus_buffer_base + len,
- SBUS_DMA_FROMDEVICE);
- return;
- }
- for (rd=first_rd; rd != -1; rd = dbri->descs[rd].next) {
- dprintk(D_DESC, ("DBRI RD %d: %08x %08x %08x %08xn",
- rd,
- dbri->dma->desc[rd].word1,
- dbri->dma->desc[rd].ba,
- dbri->dma->desc[rd].nda,
- dbri->dma->desc[rd].word4));
- }
- dbri->descs[last_rd].buffer = buffer;
- dbri->descs[last_rd].buffer_dvma = bus_buffer_base;
- dbri->descs[last_rd].len = bus_buffer - bus_buffer_base + len;
- dbri->descs[last_rd].input_callback = callback;
- dbri->descs[last_rd].input_callback_arg = callback_arg;
- dbri->pipes[pipe].desc = first_rd;
- cmd = dbri_cmdlock(dbri);
- *(cmd++) = DBRI_CMD(D_SDP, 0, dbri->pipes[pipe].sdp | D_SDP_P | D_SDP_C);
- *(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, first_rd);
- dbri_cmdsend(dbri, cmd);
- }
- /*
- ****************************************************************************
- ************************** 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 };
- static void reset_chi(struct dbri *dbri, enum master_or_slave master_or_slave,
- int bits_per_frame)
- {
- volatile s32 *cmd;
- int val;
- static int chi_initialized = 0;
- if (!chi_initialized) {
- cmd = dbri_cmdlock(dbri);
- /* Set CHI Anchor: Pipe 16 */
- val = D_DTS_VI | D_DTS_INS | D_DTS_PRVIN(16) | D_PIPE(16);
- *(cmd++) = DBRI_CMD(D_DTS, 0, val);
- *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16);
- *(cmd++) = 0;
- val = D_DTS_VO | D_DTS_INS | D_DTS_PRVOUT(16) | D_PIPE(16);
- *(cmd++) = DBRI_CMD(D_DTS, 0, val);
- *(cmd++) = 0;
- *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16);
- dbri->pipes[16].sdp = 1;
- dbri->pipes[16].nextpipe = 16;
- dbri->chi_in_pipe = 16;
- dbri->chi_out_pipe = 16;
- #if 0
- chi_initialized ++;
- #endif
- } else {
- int pipe;
- for (pipe = dbri->chi_in_pipe;
- pipe != 16;
- pipe = dbri->pipes[pipe].nextpipe) {
- unlink_time_slot(dbri, pipe, PIPEinput,
- 16, dbri->pipes[pipe].nextpipe);
- }
- for (pipe = dbri->chi_out_pipe;
- pipe != 16;
- pipe = dbri->pipes[pipe].nextpipe) {
- unlink_time_slot(dbri, pipe, PIPEoutput,
- 16, dbri->pipes[pipe].nextpipe);
- }
- dbri->chi_in_pipe = 16;
- dbri->chi_out_pipe = 16;
- cmd = dbri_cmdlock(dbri);
- }
- 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("DBRI: illegal bits_per_frame in setup_chin");
- *(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);
- dbri_cmdsend(dbri, cmd);
- }
- /*
- ****************************************************************************
- *********************** 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.
- */
- static void mmcodec_default(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;
- }
- static void mmcodec_setup_pipes(struct dbri *dbri)
- {
- /*
- * 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 readonly)
- * 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);
- dbri->mm.status = 0;
- recv_fixed(dbri, 18, & dbri->mm.status);
- recv_fixed(dbri, 19, & dbri->mm.version);
- }
- static void mmcodec_setgain(struct dbri *dbri, int muted)
- {
- if (muted || dbri->perchip_info.output_muted) {
- dbri->mm.data[0] = 63;
- dbri->mm.data[1] = 63;
- } else {
- int left_gain = (dbri->perchip_info.play.gain / 4) % 64;
- int right_gain = (dbri->perchip_info.play.gain / 4) % 64;
- int outport = dbri->perchip_info.play.port;
- if (dbri->perchip_info.play.balance < AUDIO_MID_BALANCE) {
- right_gain *= dbri->perchip_info.play.balance;
- right_gain /= AUDIO_MID_BALANCE;
- } else {
- left_gain *= AUDIO_RIGHT_BALANCE
- - dbri->perchip_info.play.balance;
- left_gain /= AUDIO_MID_BALANCE;
- }
- dprintk(D_MM, ("DBRI: Setting codec gain left: %d right: %dn",
- left_gain, right_gain));
- dbri->mm.data[0] = (63 - left_gain);
- if (outport & AUDIO_HEADPHONE) dbri->mm.data[0] |= CS4215_HE;
- if (outport & AUDIO_LINE_OUT) dbri->mm.data[0] |= CS4215_LE;
- dbri->mm.data[1] = (63 - right_gain);
- if (outport & AUDIO_SPEAKER) dbri->mm.data[1] |= CS4215_SE;
- }
- xmit_fixed(dbri, 20, *(int *)dbri->mm.data);
- }
- static void mmcodec_init_data(struct dbri *dbri)
- {
- int data_width;
- u32 tmp;
- /*
- * 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...
- */
- 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->perchip_info.play.channels
- * dbri->perchip_info.play.precision;
- link_time_slot(dbri, 20, PIPEoutput, 16,
- 32, dbri->mm.offset + 32);
- link_time_slot(dbri, 4, PIPEoutput, 16,
- data_width, dbri->mm.offset);
- link_time_slot(dbri, 6, PIPEinput, 16,
- data_width, dbri->mm.offset);
- link_time_slot(dbri, 21, PIPEinput, 16,
- 16, dbri->mm.offset + 40);
- mmcodec_setgain(dbri, 0);
- tmp = sbus_readl(dbri->regs + REG0);
- tmp |= D_C; /* Enable CHI */
- sbus_writel(tmp, dbri->regs + REG0);
- }
- /*
- * Send the control information (i.e. audio format)
- */
- static int mmcodec_setctrl(struct dbri *dbri)
- {
- int i, val;
- u32 tmp;
- /* XXX - 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.
- */
- mmcodec_setgain(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);
- 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?
- */
- 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 readonly)
- * Pipe 18: Receive timeslot 1 (clb).
- * Pipe 19: Receive timeslot 7 (version).
- */
- link_time_slot(dbri, 17, PIPEoutput, 16,
- 32, dbri->mm.offset);
- link_time_slot(dbri, 18, PIPEinput, 16,
- 8, dbri->mm.offset);
- link_time_slot(dbri, 19, PIPEinput, 16,
- 8, dbri->mm.offset + 48);
- /* 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);
- tmp = sbus_readl(dbri->regs + REG0);
- tmp |= D_C; /* Enable CHI */
- sbus_writel(tmp, dbri->regs + REG0);
- i = 64;
- while (((dbri->mm.status & 0xe4) != 0x20) && --i)
- udelay(125);
- if (i == 0) {
- dprintk(D_MM, ("DBRI: CS4215 didn't respond to CLB (0x%02x)n",
- dbri->mm.status));
- return -1;
- }
- /* 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);
- mmcodec_setgain(dbri, 0);
- return 0;
- }
- static int mmcodec_init(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- u32 reg2 = sbus_readl(dbri->regs + REG2);
- /* Look for the cs4215 chips */
- if(reg2 & D_PIO2) {
- dprintk(D_MM, ("DBRI: Onboard CS4215 detectedn"));
- dbri->mm.onboard = 1;
- }
- if(reg2 & D_PIO0) {
- dprintk(D_MM, ("DBRI: Speakerbox detectedn"));
- dbri->mm.onboard = 0;
- }
-
- /* Using the Speakerbox, if both are attached. */
- if((reg2 & D_PIO2) && (reg2 & D_PIO0)) {
- printk("DBRI: Using speakerbox / ignoring onboard mmcodec.n");
- sbus_writel(D_ENPIO2, dbri->regs + REG2);
- dbri->mm.onboard = 0;
- }
- if(!(reg2 & (D_PIO0|D_PIO2))) {
- printk("DBRI: no mmcodec found.n");
- return -EIO;
- }
- mmcodec_setup_pipes(dbri);
- mmcodec_default(&dbri->mm);
- dbri->mm.version = 0xff;
- dbri->mm.offset = dbri->mm.onboard ? 0 : 8;
- if (mmcodec_setctrl(dbri) == -1 || dbri->mm.version == 0xff) {
- dprintk(D_MM, ("DBRI: CS4215 failed probe at offset %dn",
- dbri->mm.offset));
- return -EIO;
- }
- dprintk(D_MM, ("DBRI: Found CS4215 at offset %dn", dbri->mm.offset));
- dbri->perchip_info.play.channels = 1;
- dbri->perchip_info.play.precision = 8;
- dbri->perchip_info.play.gain = (AUDIO_MAX_GAIN * 7 / 10); /* 70% */
- dbri->perchip_info.play.balance = AUDIO_MID_BALANCE;
- dbri->perchip_info.play.port = dbri->perchip_info.play.avail_ports =
- AUDIO_SPEAKER | AUDIO_HEADPHONE | AUDIO_LINE_OUT;
- dbri->perchip_info.record.port = AUDIO_MICROPHONE;
- dbri->perchip_info.record.avail_ports =
- AUDIO_MICROPHONE | AUDIO_LINE_IN;
- mmcodec_init_data(dbri);
- return 0;
- }
- /*
- ****************************************************************************
- ******************** Interface with sparcaudio midlevel ********************
- ****************************************************************************
- The sparcaudio midlevel is contained in the file audio.c. It interfaces
- to the user process and performs buffering, intercepts SunOS-style ioctl's,
- etc. It interfaces to a abstract audio device via a struct sparcaudio_driver.
- This code presents such an interface for the DBRI with an attached CS4215.
- All our routines are defined, and then comes our struct sparcaudio_driver.
- */
- /******************* sparcaudio midlevel - audio output *******************/
- static void dbri_audio_output_callback(void * callback_arg, int status)
- {
- struct sparcaudio_driver *drv = callback_arg;
- if (status != -1)
- sparcaudio_output_done(drv, 1);
- }
- static void dbri_start_output(struct sparcaudio_driver *drv,
- __u8 * buffer, unsigned long count)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- dprintk(D_USR, ("DBRI: start audio output buf=%p/%ldn",
- buffer, count));
- /* Pipe 4 is audio transmit */
- xmit_on_pipe(dbri, 4, buffer, count,
- &dbri_audio_output_callback, drv);
- #if 0
- /* Notify midlevel that we're a DMA-capable driver that
- * can accept another buffer immediately. We should probably
- * check that we've got enough resources (i.e, descriptors)
- * available before doing this, but the default midlevel
- * settings only buffer 64KB, which we can handle with 16
- * of our DBRI_NO_DESCS (64) descriptors.
- *
- * This code is #ifdef'ed out because it's caused me more
- * problems than it solved. It'd be nice to provide the
- * DBRI with a chain of buffers, but the midlevel code is
- * so tricky that I really don't want to deal with it.
- */
- sparcaudio_output_done(drv, 2);
- #endif
- }
- static void dbri_stop_output(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- reset_pipe(dbri, 4);
- }
- /******************* sparcaudio midlevel - audio input ********************/
- static void dbri_audio_input_callback(void * callback_arg, int status,
- unsigned int len)
- {
- struct sparcaudio_driver * drv =
- (struct sparcaudio_driver *) callback_arg;
- if (status != -1)
- sparcaudio_input_done(drv, 3);
- }
- static void dbri_start_input(struct sparcaudio_driver *drv,
- __u8 * buffer, unsigned long len)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- /* Pipe 6 is audio receive */
- recv_on_pipe(dbri, 6, buffer, len,
- &dbri_audio_input_callback, (void *)drv);
- dprintk(D_USR, ("DBRI: start audio input buf=%p/%ldn",
- buffer, len));
- }
- static void dbri_stop_input(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- reset_pipe(dbri, 6);
- }
- /******************* sparcaudio midlevel - volume & balance ***************/
- static int dbri_set_output_volume(struct sparcaudio_driver *drv, int volume)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- dbri->perchip_info.play.gain = volume;
- mmcodec_setgain(dbri, 0);
- return 0;
- }
- static int dbri_get_output_volume(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.play.gain;
- }
- static int dbri_set_input_volume(struct sparcaudio_driver *drv, int volume)
- {
- return 0;
- }
- static int dbri_get_input_volume(struct sparcaudio_driver *drv)
- {
- return 0;
- }
- static int dbri_set_monitor_volume(struct sparcaudio_driver *drv, int volume)
- {
- return 0;
- }
- static int dbri_get_monitor_volume(struct sparcaudio_driver *drv)
- {
- return 0;
- }
- static int dbri_set_output_balance(struct sparcaudio_driver *drv, int balance)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- dbri->perchip_info.play.balance = balance;
- mmcodec_setgain(dbri, 0);
- return 0;
- }
- static int dbri_get_output_balance(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.play.balance;
- }
- static int dbri_set_input_balance(struct sparcaudio_driver *drv, int balance)
- {
- return 0;
- }
- static int dbri_get_input_balance(struct sparcaudio_driver *drv)
- {
- return 0;
- }
- static int dbri_set_output_muted(struct sparcaudio_driver *drv, int mute)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- dbri->perchip_info.output_muted = mute;
- return 0;
- }
- static int dbri_get_output_muted(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.output_muted;
- }
- /******************* sparcaudio midlevel - encoding format ****************/
- static int dbri_set_output_channels(struct sparcaudio_driver *drv, int chan)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- switch (chan) {
- case 0:
- return 0;
- case 1:
- dbri->mm.ctrl[1] &= ~CS4215_DFR_STEREO;
- break;
- case 2:
- dbri->mm.ctrl[1] |= CS4215_DFR_STEREO;
- break;
- default:
- return -1;
- }
- dbri->perchip_info.play.channels = chan;
- mmcodec_setctrl(dbri);
- mmcodec_init_data(dbri);
- return 0;
- }
- static int dbri_get_output_channels(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.play.channels;
- }
- static int dbri_set_input_channels(struct sparcaudio_driver *drv, int chan)
- {
- return dbri_set_output_channels(drv, chan);
- }
- static int dbri_get_input_channels(struct sparcaudio_driver *drv)
- {
- return dbri_get_output_channels(drv);
- }
- static int dbri_set_output_precision(struct sparcaudio_driver *drv, int prec)
- {
- return 0;
- }
- static int dbri_get_output_precision(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.play.precision;
- }
- static int dbri_set_input_precision(struct sparcaudio_driver *drv, int prec)
- {
- return 0;
- }
- static int dbri_get_input_precision(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.play.precision;
- }
- static int dbri_set_output_encoding(struct sparcaudio_driver *drv, int enc)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- /* For ULAW and ALAW, audio.c enforces precision = 8,
- * for LINEAR, precision must be 16
- */
- switch (enc) {
- case AUDIO_ENCODING_NONE:
- return 0;
- case AUDIO_ENCODING_ULAW:
- dbri->mm.ctrl[1] &= ~3;
- dbri->mm.ctrl[1] |= CS4215_DFR_ULAW;
- dbri->perchip_info.play.encoding = enc;
- dbri->perchip_info.play.precision = 8;
- break;
- case AUDIO_ENCODING_ALAW:
- dbri->mm.ctrl[1] &= ~3;
- dbri->mm.ctrl[1] |= CS4215_DFR_ALAW;
- dbri->perchip_info.play.encoding = enc;
- dbri->perchip_info.play.precision = 8;
- break;
- case AUDIO_ENCODING_LINEAR:
- dbri->mm.ctrl[1] &= ~3;
- dbri->mm.ctrl[1] |= CS4215_DFR_LINEAR16;
- dbri->perchip_info.play.encoding = enc;
- dbri->perchip_info.play.precision = 16;
- break;
- default:
- return -1;
- };
- mmcodec_setctrl(dbri);
- mmcodec_init_data(dbri);
- return 0;
- }
- static int dbri_get_output_encoding(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.play.encoding;
- }
- static int dbri_set_input_encoding(struct sparcaudio_driver *drv, int enc)
- {
- return dbri_set_output_encoding(drv, enc);
- }
- static int dbri_get_input_encoding(struct sparcaudio_driver *drv)
- {
- return dbri_get_output_encoding(drv);
- }
- static int dbri_set_output_rate(struct sparcaudio_driver *drv, int rate)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- int i;
- if (rate == 0)
- return 0;
- for (i=0; CS4215_FREQ[i].freq; i++) {
- if (CS4215_FREQ[i].freq == rate)
- break;
- }
- if (CS4215_FREQ[i].freq == 0)
- return -1;
- dbri->mm.ctrl[1] &= ~ 0x38;
- dbri->mm.ctrl[1] |= CS4215_FREQ[i].csval;
- dbri->mm.ctrl[2] &= ~ 0x70;
- dbri->mm.ctrl[2] |= CS4215_FREQ[i].xtal;
- dbri->perchip_info.play.sample_rate = rate;
- mmcodec_setctrl(dbri);
- mmcodec_init_data(dbri);
- return 0;
- }
- static int dbri_get_output_rate(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.play.sample_rate;
- }
- static int dbri_set_input_rate(struct sparcaudio_driver *drv, int rate)
- {
- return dbri_set_output_rate(drv, rate);
- }
- static int dbri_get_input_rate(struct sparcaudio_driver *drv)
- {
- return dbri_get_output_rate(drv);
- }
- /******************* sparcaudio midlevel - ports ***********************/
- static int dbri_set_output_port(struct sparcaudio_driver *drv, int port)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- port &= dbri->perchip_info.play.avail_ports;
- dbri->perchip_info.play.port = port;
- mmcodec_setgain(dbri, 0);
- return 0;
- }
- static int dbri_get_output_port(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.play.port;
- }
- static int dbri_set_input_port(struct sparcaudio_driver *drv, int port)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- port &= dbri->perchip_info.record.avail_ports;
- dbri->perchip_info.record.port = port;
- mmcodec_setgain(dbri, 0);
- return 0;
- }
- static int dbri_get_input_port(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.record.port;
- }
- static int dbri_get_output_ports(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.play.avail_ports;
- }
- static int dbri_get_input_ports(struct sparcaudio_driver *drv)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- return dbri->perchip_info.record.avail_ports;
- }
- /******************* sparcaudio midlevel - driver ID ********************/
- static void dbri_audio_getdev(struct sparcaudio_driver *drv,
- audio_device_t *audinfo)
- {
- struct dbri *dbri = (struct dbri *) drv->private;
- strncpy(audinfo->name, "SUNW,DBRI", sizeof(audinfo->name) - 1);
- audinfo->version[0] = dbri->dbri_version;
- audinfo->version[1] = ' ';
- strncpy(audinfo->config, "onboard1", sizeof(audinfo->config) - 1);
- }
- static int dbri_sunaudio_getdev_sunos(struct sparcaudio_driver *drv)
- {
- return AUDIO_DEV_CODEC;
- }
- /******************* sparcaudio midlevel - open & close ******************/
- static int dbri_open(struct inode * inode, struct file * file,
- struct sparcaudio_driver *drv)
- {
- MOD_INC_USE_COUNT;
- return 0;
- }
- static void dbri_release(struct inode * inode, struct file * file,
- struct sparcaudio_driver *drv)
- {
- MOD_DEC_USE_COUNT;
- }
- static int dbri_ioctl(struct inode * inode, struct file * file,
- unsigned int x, unsigned long y,
- struct sparcaudio_driver *drv)
- {
- return -EINVAL;
- }
- /*********** sparcaudio midlevel - struct sparcaudio_driver ************/
- static struct sparcaudio_operations dbri_ops = {
- dbri_open,
- dbri_release,
- dbri_ioctl,
- dbri_start_output,
- dbri_stop_output,
- dbri_start_input,
- dbri_stop_input,
- dbri_audio_getdev,
- dbri_set_output_volume,
- dbri_get_output_volume,
- dbri_set_input_volume,
- dbri_get_input_volume,
- dbri_set_monitor_volume,
- dbri_get_monitor_volume,
- dbri_set_output_balance,
- dbri_get_output_balance,
- dbri_set_input_balance,
- dbri_get_input_balance,
- dbri_set_output_channels,
- dbri_get_output_channels,
- dbri_set_input_channels,
- dbri_get_input_channels,
- dbri_set_output_precision,
- dbri_get_output_precision,
- dbri_set_input_precision,
- dbri_get_input_precision,
- dbri_set_output_port,
- dbri_get_output_port,
- dbri_set_input_port,
- dbri_get_input_port,
- dbri_set_output_encoding,
- dbri_get_output_encoding,
- dbri_set_input_encoding,
- dbri_get_input_encoding,
- dbri_set_output_rate,
- dbri_get_output_rate,
- dbri_set_input_rate,
- dbri_get_input_rate,
- dbri_sunaudio_getdev_sunos,
- dbri_get_output_ports,
- dbri_get_input_ports,
- dbri_set_output_muted,
- dbri_get_output_muted,
- };
- /*
- ****************************************************************************
- ************************** ISDN (Hisax) Interface **************************
- ****************************************************************************
- */
- void dbri_isdn_init(struct dbri *dbri)
- {
- /* Pipe 0: Receive D channel
- * Pipe 8: Receive B1 channel
- * Pipe 9: Receive B2 channel
- * Pipe 1: Transmit D channel
- * Pipe 10: Transmit B1 channel
- * Pipe 11: Transmit B2 channel
- */
- setup_pipe(dbri, 0, D_SDP_HDLC | D_SDP_FROM_SER | D_SDP_LSB);
- setup_pipe(dbri, 8, D_SDP_HDLC | D_SDP_FROM_SER | D_SDP_LSB);
- setup_pipe(dbri, 9, D_SDP_HDLC | D_SDP_FROM_SER | D_SDP_LSB);
- setup_pipe(dbri, 1, D_SDP_HDLC_D | D_SDP_TO_SER | D_SDP_LSB);
- setup_pipe(dbri,10, D_SDP_HDLC | D_SDP_TO_SER | D_SDP_LSB);
- setup_pipe(dbri,11, D_SDP_HDLC | D_SDP_TO_SER | D_SDP_LSB);
- link_time_slot(dbri, 0, PIPEinput, 0, 2, 17);
- link_time_slot(dbri, 8, PIPEinput, 0, 8, 0);
- link_time_slot(dbri, 9, PIPEinput, 8, 8, 8);
- link_time_slot(dbri, 1, PIPEoutput, 1, 2, 17);
- link_time_slot(dbri, 10, PIPEoutput, 1, 8, 0);
- link_time_slot(dbri, 11, PIPEoutput, 10, 8, 8);
- }
- int dbri_get_irqnum(int dev)
- {
- struct dbri *dbri;
- if (dev >= num_drivers)
- return(0);
- dbri = (struct dbri *) drivers[dev].private;
- tprintk(("dbri_get_irqnum()n"));
- /* On the sparc, the cpu's irq number is only part of the "irq" */
- return (dbri->irq & NR_IRQS);
- }
- int dbri_get_liu_state(int dev)
- {
- struct dbri *dbri;
- if (dev >= num_drivers)
- return(0);
- dbri = (struct dbri *) drivers[dev].private;
- tprintk(("dbri_get_liu_state() returns %dn", dbri->liu_state));
- return dbri->liu_state;
- }
- void dbri_liu_activate(int dev, int priority);
- void dbri_liu_init(int dev, void (*callback)(void *), void *callback_arg)
- {
- struct dbri *dbri;
- if (dev >= num_drivers)
- return;
- dbri = (struct dbri *) drivers[dev].private;
- tprintk(("dbri_liu_init()n"));
- /* Set callback for LIU state change */
- dbri->liu_callback = callback;
- dbri->liu_callback_arg = callback_arg;
- dbri_isdn_init(dbri);
- dbri_liu_activate(dev, 0);
- }
- void dbri_liu_activate(int dev, int priority)
- {
- struct dbri *dbri;
- int val;
- volatile s32 *cmd;
- if (dev >= num_drivers)
- return;
- dbri = (struct dbri *) drivers[dev].private;
- tprintk(("dbri_liu_activate()n"));
- if (dbri->liu_state <= 3) {
- u32 tmp;
- cmd = dbri_cmdlock(dbri);
- /* Turn on the ISDN TE interface and request activation */
- val = D_NT_IRM_IMM | D_NT_IRM_EN | D_NT_ACT;
- #ifdef LOOPBACK_D
- val |= D_NT_LLB(4);
- #endif
- *(cmd++) = DBRI_CMD(D_TE, 0, val);
- dbri_cmdsend(dbri, cmd);
- /* Activate the interface */
- tmp = sbus_readl(dbri->regs + REG0);
- tmp |= D_T;
- sbus_writel(tmp, dbri->regs + REG0);
- }
- }
- void dbri_liu_deactivate(int dev)
- {
- struct dbri *dbri;
- #if 0
- u32 tmp;
- #endif
- if (dev >= num_drivers)
- return;
- dbri = (struct dbri *) drivers[dev].private;
- tprintk(("dbri_liu_deactivate()n"));
- #if 0
- /* Turn off the ISDN TE interface */
- tmp = sbus_readl(dbri->regs + REG0);
- tmp &= ~D_T;
- sbus_writel(tmp, dbri->regs + REG0);
- dbri->liu_state = 0;
- #endif
- }
- void dbri_dxmit(int dev, __u8 *buffer, unsigned int count,
- void (*callback)(void *, int), void *callback_arg)
- {
- struct dbri *dbri;
- if (dev >= num_drivers)
- return;
- dbri = (struct dbri *) drivers[dev].private;
- /* Pipe 1 is D channel transmit */
- xmit_on_pipe(dbri, 1, buffer, count, callback, callback_arg);
- }
- void dbri_drecv(int dev, __u8 *buffer, unsigned int size,
- void (*callback)(void *, int, unsigned int),
- void *callback_arg)
- {
- struct dbri *dbri;
- if (dev >= num_drivers)
- return;
- dbri = (struct dbri *) drivers[dev].private;
- /* Pipe 0 is D channel receive */
- recv_on_pipe(dbri, 0, buffer, size, callback, callback_arg);
- }
- int dbri_bopen(int dev, unsigned int chan,
- int hdlcmode, u_char xmit_idle_char)
- {
- struct dbri *dbri;
- if (dev >= num_drivers || chan > 1)
- return -1;
- dbri = (struct dbri *) drivers[dev].private;
- if (hdlcmode) {
- /* return -1; */
- /* Pipe 8/9: receive B1/B2 channel */
- setup_pipe(dbri, 8+chan, D_SDP_HDLC | D_SDP_FROM_SER|D_SDP_LSB);
- /* Pipe 10/11: transmit B1/B2 channel */
- setup_pipe(dbri,10+chan, D_SDP_HDLC | D_SDP_TO_SER | D_SDP_LSB);
- } else { /* !hdlcmode means transparent */
- /* Pipe 8/9: receive B1/B2 channel */
- setup_pipe(dbri, 8+chan, D_SDP_MEM | D_SDP_FROM_SER|D_SDP_LSB);
- /* Pipe 10/11: transmit B1/B2 channel */
- setup_pipe(dbri,10+chan, D_SDP_MEM | D_SDP_TO_SER | D_SDP_LSB);
- }
- return 0;
- }
- void dbri_bclose(int dev, unsigned int chan)
- {
- struct dbri *dbri;
- if (dev >= num_drivers || chan > 1)
- return;
- dbri = (struct dbri *) drivers[dev].private;
- reset_pipe(dbri, 8+chan);
- reset_pipe(dbri, 10+chan);
- }
- void dbri_bxmit(int dev, unsigned int chan,
- __u8 *buffer, unsigned long count,
- void (*callback)(void *, int),
- void *callback_arg)
- {
- struct dbri *dbri;
- if (dev >= num_drivers || chan > 1)
- return;
- dbri = (struct dbri *) drivers[dev].private;
- /* Pipe 10/11 is B1/B2 channel transmit */
- xmit_on_pipe(dbri, 10+chan, buffer, count, callback, callback_arg);
- }
- void dbri_brecv(int dev, unsigned int chan,
- __u8 *buffer, unsigned long size,
- void (*callback)(void *, int, unsigned int),
- void *callback_arg)
- {
- struct dbri *dbri;
- if (dev >= num_drivers || chan > 1)
- return;
- dbri = (struct dbri *) drivers[dev].private;
- /* Pipe 8/9 is B1/B2 channel receive */
- recv_on_pipe(dbri, 8+chan, buffer, size, callback, callback_arg);
- }
- #if defined(DBRI_ISDN)
- struct foreign_interface dbri_foreign_interface = {
- dbri_get_irqnum,
- dbri_get_liu_state,
- dbri_liu_init,
- dbri_liu_activate,
- dbri_liu_deactivate,
- dbri_dxmit,
- dbri_drecv,
- dbri_bopen,
- dbri_bclose,
- dbri_bxmit,
- dbri_brecv
- };
- EXPORT_SYMBOL(dbri_foreign_interface);
- #endif
- /*
- ****************************************************************************
- **************************** Initialization ********************************
- ****************************************************************************
- */
- static int dbri_attach(struct sparcaudio_driver *drv,
- struct sbus_dev *sdev)
- {
- struct dbri *dbri;
- struct linux_prom_irqs irq;
- int err;
- if (sdev->prom_name[9] < 'e') {
- printk(KERN_ERR "DBRI: unsupported chip version %c found.n",
- sdev->prom_name[9]);
- return -EIO;
- }
- drv->ops = &dbri_ops;
- drv->private = kmalloc(sizeof(struct dbri), GFP_KERNEL);
- if (drv->private == NULL)
- return -ENOMEM;
- dbri = (struct dbri *) drv->private;
- memset(dbri, 0, sizeof(*dbri));
- dbri->dma = sbus_alloc_consistent(sdev,
- sizeof(struct dbri_dma),
- &dbri->dma_dvma);
- memset((void *) dbri->dma, 0, sizeof(struct dbri_dma));
- dprintk(D_GEN, ("DBRI: DMA Cmd Block 0x%p (0x%08x)n",
- dbri->dma, dbri->dma_dvma));
- dbri->dbri_version = sdev->prom_name[9];
- dbri->sdev = sdev;
- /* Map the registers into memory. */
- dbri->regs_size = sdev->reg_addrs[0].reg_size;
- dbri->regs = sbus_ioremap(&sdev->resource[0], 0,
- sdev->reg_addrs[0].reg_size,
- "DBRI Registers");
- if (!dbri->regs) {
- printk(KERN_ERR "DBRI: could not allocate registersn");
- sbus_free_consistent(sdev, sizeof(struct dbri_dma),
- (void *)dbri->dma, dbri->dma_dvma);
- kfree(drv->private);
- return -EIO;
- }
- prom_getproperty(sdev->prom_node, "intr", (char *)&irq, sizeof(irq));
- dbri->irq = irq.pri;
- err = request_irq(dbri->irq, dbri_intr, SA_SHIRQ,
- "DBRI audio/ISDN", dbri);
- if (err) {
- printk(KERN_ERR "DBRI: Can't get irq %dn", dbri->irq);
- sbus_iounmap(dbri->regs, dbri->regs_size);
- sbus_free_consistent(sdev, sizeof(struct dbri_dma),
- (void *)dbri->dma, dbri->dma_dvma);
- kfree(drv->private);
- return err;
- }
- dbri_initialize(dbri);
- err = mmcodec_init(drv);
- if(err) {
- dbri_detach(dbri);
- return err;
- }
-
- /* Register ourselves with the midlevel audio driver. */
- err = register_sparcaudio_driver(drv,1);
- if (err) {
- printk(KERN_ERR "DBRI: unable to register audion");
- dbri_detach(dbri);
- return err;
- }
- dbri->perchip_info.play.active = dbri->perchip_info.play.pause = 0;
- dbri->perchip_info.record.active = dbri->perchip_info.record.pause = 0;
- printk(KERN_INFO "audio%d at 0x%lx (irq %d) is DBRI(%c)+CS4215(%d)n",
- num_drivers, dbri->regs,
- dbri->irq, dbri->dbri_version, dbri->mm.version);
-
- return 0;
- }
- /* Probe for the dbri chip and then attach the driver. */
- static int __init dbri_init(void)
- {
- struct sbus_bus *sbus;
- struct sbus_dev *sdev;
-
- num_drivers = 0;
-
- /* Probe each SBUS for the DBRI chip(s). */
- for_all_sbusdev(sdev, sbus) {
- /*
- * The version is coded in the last character
- */
- if (!strncmp(sdev->prom_name, "SUNW,DBRI", 9)) {
- dprintk(D_GEN, ("DBRI: Found %s in SBUS slot %dn",
- sdev->prom_name, sdev->slot));
- if (num_drivers >= MAX_DRIVERS) {
- printk("DBRI: Ignoring slot %dn", sdev->slot);
- continue;
- }
-
- if (dbri_attach(&drivers[num_drivers], sdev) == 0)
- num_drivers++;
- }
- }
-
- return (num_drivers > 0) ? 0 : -EIO;
- }
- static void __exit dbri_exit(void)
- {
- register int i;
- for (i = 0; i < num_drivers; i++) {
- dbri_detach((struct dbri *) drivers[i].private);
- unregister_sparcaudio_driver(& drivers[i], 1);
- num_drivers--;
- }
- }
- module_init(dbri_init);
- module_exit(dbri_exit);
- MODULE_LICENSE("GPL");
- /*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local Variables:
- * c-indent-level: 8
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -8
- * c-argdecl-indent: 8
- * c-label-offset: -8
- * c-continued-statement-offset: 8
- * c-continued-brace-offset: 0
- * indent-tabs-mode: nil
- * tab-width: 8
- * End:
- */