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/*-
* Copyright (c) 1999 Seigo Tanimura
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "opt_devfs.h"
#include <dev/sound/midi/midi.h>
#include <dev/sound/chip.h>
#include <dev/sound/pci/csareg.h>
#include <machine/cpufunc.h>
static devclass_t midi_devclass;
#ifndef DDB
#undef DDB
#define DDB(x)
#endif /* DDB */
#define CSAMIDI_RESET 0xff
#define CSAMIDI_UART 0x3f
#define CSAMIDI_ACK 0xfe
#define CSAMIDI_STATMASK 0xc0
#define CSAMIDI_OUTPUTBUSY 0x40
#define CSAMIDI_INPUTBUSY 0x80
#define CSAMIDI_TRYDATA 50
#define CSAMIDI_DELAY 25000
extern synthdev_info midisynth_op_desc;
/* These are the synthesizer and the midi interface information. */
static struct synth_info csamidi_synthinfo = {
"CS461x MIDI",
0,
SYNTH_TYPE_MIDI,
0,
0,
128,
128,
128,
SYNTH_CAP_INPUT,
};
static struct midi_info csamidi_midiinfo = {
"CS461x MIDI",
0,
0,
0,
};
/*
* These functions goes into csamidi_op_desc to get called
* from sound.c.
*/
static int csamidi_probe(device_t dev);
static int csamidi_attach(device_t dev);
static d_ioctl_t csamidi_ioctl;
static driver_intr_t csamidi_intr;
static midi_callback_t csamidi_callback;
/* Here is the parameter structure per a device. */
struct csamidi_softc {
device_t dev; /* device information */
mididev_info *devinfo; /* midi device information */
struct csa_bridgeinfo *binfo; /* The state of the parent. */
struct resource *io; /* Base of io map */
int io_rid; /* Io map resource ID */
struct resource *mem; /* Base of memory map */
int mem_rid; /* Memory map resource ID */
struct resource *irq; /* Irq */
int irq_rid; /* Irq resource ID */
void *ih; /* Interrupt cookie */
int fflags; /* File flags */
};
typedef struct csamidi_softc *sc_p;
/* These functions are local. */
static void csamidi_startplay(sc_p scp);
static void csamidi_xmit(sc_p scp);
static int csamidi_reset(sc_p scp);
static int csamidi_status(sc_p scp);
static int csamidi_command(sc_p scp, u_int32_t value);
static int csamidi_readdata(sc_p scp);
static int csamidi_writedata(sc_p scp, u_int32_t value);
static u_int32_t csamidi_readio(sc_p scp, u_long offset);
static void csamidi_writeio(sc_p scp, u_long offset, u_int32_t data);
static u_int32_t csamidi_readmem(sc_p scp, u_long offset);
static void csamidi_writemem(sc_p scp, u_long offset, u_int32_t data);
static int csamidi_allocres(sc_p scp, device_t dev);
static void csamidi_releaseres(sc_p scp, device_t dev);
/*
* This is the device descriptor for the midi device.
*/
static mididev_info csamidi_op_desc = {
"CS461x midi",
SNDCARD_MPU401,
NULL,
NULL,
NULL,
NULL,
csamidi_ioctl,
NULL,
csamidi_callback,
MIDI_BUFFSIZE, /* Queue Length */
0, /* XXX This is not an *audio* device! */
};
/*
* Here are the main functions to interact to the user process.
*/
static int
csamidi_probe(device_t dev)
{
char *s;
sc_p scp;
struct sndcard_func *func;
/* The parent device has already been probed. */
func = device_get_ivars(dev);
if (func == NULL || func->func != SCF_MIDI)
return (ENXIO);
s = "CS461x Midi Interface";
scp = device_get_softc(dev);
bzero(scp, sizeof(*scp));
scp->io_rid = CS461x_IO_OFFSET;
scp->mem_rid = CS461x_MEM_OFFSET;
scp->irq_rid = 0;
device_set_desc(dev, s);
return (0);
}
static int
csamidi_attach(device_t dev)
{
sc_p scp;
mididev_info *devinfo;
struct sndcard_func *func;
int unit;
scp = device_get_softc(dev);
unit = device_get_unit(dev);
func = device_get_ivars(dev);
scp->binfo = func->varinfo;
/* Allocate the resources. */
if (csamidi_allocres(scp, dev)) {
csamidi_releaseres(scp, dev);
return (ENXIO);
}
/* Fill the softc. */
scp->dev = dev;
scp->devinfo = devinfo = &midi_info[unit];
/* Fill the midi info. */
bcopy(&csamidi_op_desc, devinfo, sizeof(csamidi_op_desc));
midiinit(devinfo, dev);
devinfo->flags = 0;
bcopy(&midisynth_op_desc, &devinfo->synth, sizeof(midisynth_op_desc));
snprintf(devinfo->midistat, sizeof(devinfo->midistat), "at irq %d",
(int)rman_get_start(scp->irq));
/* Init the queue. */
devinfo->midi_dbuf_in.unit_size = devinfo->midi_dbuf_out.unit_size = 1;
midibuf_init(&devinfo->midi_dbuf_in);
midibuf_init(&devinfo->midi_dbuf_out);
/* Increase the number of midi devices. */
nmidi++;
/* Enable interrupt. */
if (bus_setup_intr(dev, scp->irq, INTR_TYPE_TTY, csamidi_intr, scp, &scp->ih)) {
csamidi_releaseres(scp, dev);
return (ENXIO);
}
/* Reset the interface. */
csamidi_reset(scp);
return (0);
}
static int
csamidi_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct proc *p)
{
sc_p scp;
mididev_info *devinfo;
int unit;
struct synth_info *synthinfo;
struct midi_info *midiinfo;
unit = MIDIUNIT(i_dev);
if (unit >= nmidi + nsynth) {
DEB(printf("csamidi_ioctl: unit %d does not exist.\n", unit));
return (ENXIO);
}
devinfo = get_mididev_info(i_dev, &unit);
if (devinfo == NULL) {
DEB(printf("csamidi_ioctl: unit %d is not configured.\n", unit));
return (ENXIO);
}
scp = devinfo->softc;
switch (cmd) {
case SNDCTL_SYNTH_INFO:
synthinfo = (struct synth_info *)arg;
if (synthinfo->device > nmidi + nsynth || synthinfo->device != unit)
return (ENXIO);
bcopy(&csamidi_synthinfo, synthinfo, sizeof(csamidi_synthinfo));
synthinfo->device = unit;
return (0);
break;
case SNDCTL_MIDI_INFO:
midiinfo = (struct midi_info *)arg;
if (midiinfo->device > nmidi + nsynth || midiinfo->device != unit)
return (ENXIO);
bcopy(&csamidi_midiinfo, midiinfo, sizeof(csamidi_midiinfo));
midiinfo->device = unit;
return (0);
break;
default:
return (ENOSYS);
}
/* NOTREACHED */
return (EINVAL);
}
static void
csamidi_intr(void *arg)
{
sc_p scp;
u_char c;
mididev_info *devinfo;
scp = (sc_p)arg;
devinfo = scp->devinfo;
/* Read the received data. */
while ((csamidi_status(scp) & MIDSR_RBE) == 0) {
/* Receive the data. */
c = (u_char)csamidi_readdata(scp);
/* Queue into the passthru buffer and start transmitting if we can. */
if ((devinfo->flags & MIDI_F_PASSTHRU) != 0 && ((devinfo->flags & MIDI_F_BUSY) == 0 || (devinfo->fflags & FWRITE) == 0)) {
midibuf_input_intr(&devinfo->midi_dbuf_passthru, &c, sizeof(c));
devinfo->callback(devinfo, MIDI_CB_START | MIDI_CB_WR);
}
/* Queue if we are reading. Discard an active sensing. */
if ((devinfo->flags & MIDI_F_READING) != 0 && c != 0xfe)
midibuf_input_intr(&devinfo->midi_dbuf_in, &c, sizeof(c));
}
/* Transmit out data. */
if ((devinfo->flags & MIDI_F_WRITING) != 0 && (csamidi_status(scp) & MIDSR_TBF) == 0)
csamidi_xmit(scp);
/* Invoke the upper layer. */
midi_intr(devinfo);
}
static int
csamidi_callback(mididev_info *d, int reason)
{
int unit;
sc_p scp;
if (d == NULL) {
DEB(printf("csamidi_callback: device not configured.\n"));
return (ENXIO);
}
unit = d->unit;
scp = d->softc;
switch (reason & MIDI_CB_REASON_MASK) {
case MIDI_CB_START:
if ((reason & MIDI_CB_RD) != 0 && (d->flags & MIDI_F_READING) == 0)
/* Begin recording. */
d->flags |= MIDI_F_READING;
if ((reason & MIDI_CB_WR) != 0 && (d->flags & MIDI_F_WRITING) == 0)
/* Start playing. */
csamidi_startplay(scp);
break;
case MIDI_CB_STOP:
case MIDI_CB_ABORT:
if ((reason & MIDI_CB_RD) != 0 && (d->flags & MIDI_F_READING) != 0)
/* Stop recording. */
d->flags &= ~MIDI_F_READING;
if ((reason & MIDI_CB_WR) != 0 && (d->flags & MIDI_F_WRITING) != 0)
/* Stop Playing. */
d->flags &= ~MIDI_F_WRITING;
break;
}
return (0);
}
/*
* The functions below here are the libraries for the above ones.
*/
/*
* Starts to play the data in the output queue.
* Call this at >=splclock.
*/
static void
csamidi_startplay(sc_p scp)
{
mididev_info *devinfo;
devinfo = scp->devinfo;
/* Can we play now? */
if (devinfo->midi_dbuf_out.rl == 0)
return;
devinfo->flags |= MIDI_F_WRITING;
csamidi_xmit(scp);
}
static void
csamidi_xmit(sc_p scp)
{
register mididev_info *devinfo;
register midi_dbuf *dbuf;
u_char c;
devinfo = scp->devinfo;
/* See which source to use. */
if ((devinfo->flags & MIDI_F_PASSTHRU) == 0 || ((devinfo->flags & MIDI_F_BUSY) != 0 && (devinfo->fflags & FWRITE) != 0))
dbuf = &devinfo->midi_dbuf_out;
else
dbuf = &devinfo->midi_dbuf_passthru;
/* Transmit the data in the queue. */
while ((devinfo->flags & MIDI_F_WRITING) != 0 && (csamidi_status(scp) & MIDSR_TBF) == 0) {
/* Do we have the data to transmit? */
if (dbuf->rl == 0) {
/* Stop playing. */
devinfo->flags &= ~MIDI_F_WRITING;
break;
} else {
/* Send the data. */
midibuf_output_intr(dbuf, &c, sizeof(c));
csamidi_writedata(scp, c);
/* We are playing now. */
devinfo->flags |= MIDI_F_WRITING;
}
}
}
/* Reset midi. */
static int
csamidi_reset(sc_p scp)
{
int i, resp;
/* Reset the midi. */
resp = 0;
for (i = 0 ; i < CSAMIDI_TRYDATA ; i++) {
resp = csamidi_command(scp, MIDCR_MRST);
if (resp == 0)
break;
}
if (resp != 0)
return (1);
for (i = 0 ; i < CSAMIDI_TRYDATA ; i++) {
resp = csamidi_command(scp, MIDCR_TXE | MIDCR_RXE | MIDCR_RIE | MIDCR_TIE);
if (resp == 0)
break;
}
if (resp != 0)
return (1);
DELAY(CSAMIDI_DELAY);
return (0);
}
/* Reads the status. */
static int
csamidi_status(sc_p scp)
{
return csamidi_readio(scp, BA0_MIDSR);
}
/* Writes a command. */
static int
csamidi_command(sc_p scp, u_int32_t value)
{
csamidi_writeio(scp, BA0_MIDCR, value);
return (0);
}
/* Reads a byte of data. */
static int
csamidi_readdata(sc_p scp)
{
u_int status;
/* Is the interface ready to read? */
status = csamidi_status(scp);
if ((status & MIDSR_RBE) != 0)
/* The interface is busy. */
return (-EAGAIN);
return (int)csamidi_readio(scp, BA0_MIDRP) & 0xff;
}
/* Writes a byte of data. */
static int
csamidi_writedata(sc_p scp, u_int32_t value)
{
u_int status;
/* Is the interface ready to write? */
status = csamidi_status(scp);
if ((status & MIDSR_TBF) != 0)
/* The interface is busy. */
return (EAGAIN);
csamidi_writeio(scp, BA0_MIDWP, value & 0xff);
return (0);
}
static u_int32_t
csamidi_readio(sc_p scp, u_long offset)
{
if (offset < BA0_AC97_RESET)
return bus_space_read_4(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), offset) & 0xffffffff;
else
return (0);
}
static void
csamidi_writeio(sc_p scp, u_long offset, u_int32_t data)
{
if (offset < BA0_AC97_RESET)
bus_space_write_4(rman_get_bustag(scp->io), rman_get_bushandle(scp->io), offset, data);
}
static u_int32_t
csamidi_readmem(sc_p scp, u_long offset)
{
return bus_space_read_4(rman_get_bustag(scp->mem), rman_get_bushandle(scp->mem), offset) & 0xffffffff;
}
static void
csamidi_writemem(sc_p scp, u_long offset, u_int32_t data)
{
bus_space_write_4(rman_get_bustag(scp->mem), rman_get_bushandle(scp->mem), offset, data);
}
/* Allocates resources. */
static int
csamidi_allocres(sc_p scp, device_t dev)
{
if (scp->io == NULL) {
scp->io = bus_alloc_resource(dev, SYS_RES_MEMORY, &scp->io_rid, 0, ~0, CS461x_IO_SIZE, RF_ACTIVE);
if (scp->io == NULL)
return (1);
}
if (scp->mem == NULL) {
scp->mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &scp->mem_rid, 0, ~0, CS461x_MEM_SIZE, RF_ACTIVE);
if (scp->mem == NULL)
return (1);
}
if (scp->irq == NULL) {
scp->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &scp->irq_rid, 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
if (scp->irq == NULL)
return (1);
}
return (0);
}
/* Releases resources. */
static void
csamidi_releaseres(sc_p scp, device_t dev)
{
if (scp->irq != NULL) {
bus_release_resource(dev, SYS_RES_IRQ, scp->irq_rid, scp->irq);
scp->irq = NULL;
}
if (scp->io != NULL) {
bus_release_resource(dev, SYS_RES_MEMORY, scp->io_rid, scp->io);
scp->io = NULL;
}
if (scp->mem != NULL) {
bus_release_resource(dev, SYS_RES_MEMORY, scp->mem_rid, scp->mem);
scp->mem = NULL;
}
}
static device_method_t csamidi_methods[] = {
/* Device interface */
DEVMETHOD(device_probe , csamidi_probe ),
DEVMETHOD(device_attach, csamidi_attach),
{ 0, 0 },
};
static driver_t csamidi_driver = {
"midi",
csamidi_methods,
sizeof(struct csamidi_softc),
};
DRIVER_MODULE(csamidi, csa, csamidi_driver, midi_devclass, 0, 0);
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