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tmp_suning_uos_patched/sound/drivers/mtpav.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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/*
* MOTU Midi Timepiece ALSA Main routines
* Copyright by Michael T. Mayers (c) Jan 09, 2000
* mail: michael@tweakoz.com
* Thanks to John Galbraith
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* This driver is for the 'Mark Of The Unicorn' (MOTU)
* MidiTimePiece AV multiport MIDI interface
*
* IOPORTS
* -------
* 8 MIDI Ins and 8 MIDI outs
* Video Sync In (BNC), Word Sync Out (BNC),
* ADAT Sync Out (DB9)
* SMPTE in/out (1/4")
* 2 programmable pedal/footswitch inputs and 4 programmable MIDI controller knobs.
* Macintosh RS422 serial port
* RS422 "network" port for ganging multiple MTP's
* PC Parallel Port ( which this driver currently uses )
*
* MISC FEATURES
* -------------
* Hardware MIDI routing, merging, and filtering
* MIDI Synchronization to Video, ADAT, SMPTE and other Clock sources
* 128 'scene' memories, recallable from MIDI program change
*
*
* ChangeLog
* Jun 11 2001 Takashi Iwai <tiwai@suse.de>
* - Recoded & debugged
* - Added timer interrupt for midi outputs
* - hwports is between 1 and 8, which specifies the number of hardware ports.
* The three global ports, computer, adat and broadcast ports, are created
* always after h/w and remote ports.
*
*/
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/rawmidi.h>
#include <linux/delay.h>
#include <asm/io.h>
/*
* globals
*/
MODULE_AUTHOR("Michael T. Mayers");
MODULE_DESCRIPTION("MOTU MidiTimePiece AV multiport MIDI");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{MOTU,MidiTimePiece AV multiport MIDI}}");
// io resources
#define MTPAV_IOBASE 0x378
#define MTPAV_IRQ 7
#define MTPAV_MAX_PORTS 8
static int index = SNDRV_DEFAULT_IDX1;
static char *id = SNDRV_DEFAULT_STR1;
static long port = MTPAV_IOBASE; /* 0x378, 0x278 */
static int irq = MTPAV_IRQ; /* 7, 5 */
static int hwports = MTPAV_MAX_PORTS; /* use hardware ports 1-8 */
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for MotuMTPAV MIDI.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for MotuMTPAV MIDI.");
module_param(port, long, 0444);
MODULE_PARM_DESC(port, "Parallel port # for MotuMTPAV MIDI.");
module_param(irq, int, 0444);
MODULE_PARM_DESC(irq, "Parallel IRQ # for MotuMTPAV MIDI.");
module_param(hwports, int, 0444);
MODULE_PARM_DESC(hwports, "Hardware ports # for MotuMTPAV MIDI.");
static struct platform_device *device;
/*
* defines
*/
//#define USE_FAKE_MTP // don't actually read/write to MTP device (for debugging without an actual unit) (does not work yet)
// parallel port usage masks
#define SIGS_BYTE 0x08
#define SIGS_RFD 0x80
#define SIGS_IRQ 0x40
#define SIGS_IN0 0x10
#define SIGS_IN1 0x20
#define SIGC_WRITE 0x04
#define SIGC_READ 0x08
#define SIGC_INTEN 0x10
#define DREG 0
#define SREG 1
#define CREG 2
//
#define MTPAV_MODE_INPUT_OPENED 0x01
#define MTPAV_MODE_OUTPUT_OPENED 0x02
#define MTPAV_MODE_INPUT_TRIGGERED 0x04
#define MTPAV_MODE_OUTPUT_TRIGGERED 0x08
#define NUMPORTS (0x12+1)
/*
*/
struct mtpav_port {
u8 number;
u8 hwport;
u8 mode;
u8 running_status;
struct snd_rawmidi_substream *input;
struct snd_rawmidi_substream *output;
};
struct mtpav {
struct snd_card *card;
unsigned long port;
struct resource *res_port;
int irq; /* interrupt (for inputs) */
spinlock_t spinlock;
int share_irq; /* number of accesses to input interrupts */
int istimer; /* number of accesses to timer interrupts */
struct timer_list timer; /* timer interrupts for outputs */
struct snd_rawmidi *rmidi;
int num_ports; /* number of hw ports (1-8) */
struct mtpav_port ports[NUMPORTS]; /* all ports including computer, adat and bc */
u32 inmidiport; /* selected input midi port */
u32 inmidistate; /* during midi command 0xf5 */
u32 outmidihwport; /* selected output midi hw port */
};
/*
* possible hardware ports (selected by 0xf5 port message)
* 0x00 all ports
* 0x01 .. 0x08 this MTP's ports 1..8
* 0x09 .. 0x10 networked MTP's ports (9..16)
* 0x11 networked MTP's computer port
* 0x63 to ADAT
*
* mappig:
* subdevice 0 - (X-1) ports
* X - (2*X-1) networked ports
* X computer
* X+1 ADAT
* X+2 all ports
*
* where X = chip->num_ports
*/
#define MTPAV_PIDX_COMPUTER 0
#define MTPAV_PIDX_ADAT 1
#define MTPAV_PIDX_BROADCAST 2
static int translate_subdevice_to_hwport(struct mtpav *chip, int subdev)
{
if (subdev < 0)
return 0x01; /* invalid - use port 0 as default */
else if (subdev < chip->num_ports)
return subdev + 1; /* single mtp port */
else if (subdev < chip->num_ports * 2)
return subdev - chip->num_ports + 0x09; /* remote port */
else if (subdev == chip->num_ports * 2 + MTPAV_PIDX_COMPUTER)
return 0x11; /* computer port */
else if (subdev == chip->num_ports + MTPAV_PIDX_ADAT)
return 0x63; /* ADAT */
return 0; /* all ports */
}
static int translate_hwport_to_subdevice(struct mtpav *chip, int hwport)
{
int p;
if (hwport <= 0x00) /* all ports */
return chip->num_ports + MTPAV_PIDX_BROADCAST;
else if (hwport <= 0x08) { /* single port */
p = hwport - 1;
if (p >= chip->num_ports)
p = 0;
return p;
} else if (hwport <= 0x10) { /* remote port */
p = hwport - 0x09 + chip->num_ports;
if (p >= chip->num_ports * 2)
p = chip->num_ports;
return p;
} else if (hwport == 0x11) /* computer port */
return chip->num_ports + MTPAV_PIDX_COMPUTER;
else /* ADAT */
return chip->num_ports + MTPAV_PIDX_ADAT;
}
/*
*/
static u8 snd_mtpav_getreg(struct mtpav *chip, u16 reg)
{
u8 rval = 0;
if (reg == SREG) {
rval = inb(chip->port + SREG);
rval = (rval & 0xf8);
} else if (reg == CREG) {
rval = inb(chip->port + CREG);
rval = (rval & 0x1c);
}
return rval;
}
/*
*/
static inline void snd_mtpav_mputreg(struct mtpav *chip, u16 reg, u8 val)
{
if (reg == DREG || reg == CREG)
outb(val, chip->port + reg);
}
/*
*/
static void snd_mtpav_wait_rfdhi(struct mtpav *chip)
{
int counts = 10000;
u8 sbyte;
sbyte = snd_mtpav_getreg(chip, SREG);
while (!(sbyte & SIGS_RFD) && counts--) {
sbyte = snd_mtpav_getreg(chip, SREG);
udelay(10);
}
}
static void snd_mtpav_send_byte(struct mtpav *chip, u8 byte)
{
u8 tcbyt;
u8 clrwrite;
u8 setwrite;
snd_mtpav_wait_rfdhi(chip);
/////////////////
tcbyt = snd_mtpav_getreg(chip, CREG);
clrwrite = tcbyt & (SIGC_WRITE ^ 0xff);
setwrite = tcbyt | SIGC_WRITE;
snd_mtpav_mputreg(chip, DREG, byte);
snd_mtpav_mputreg(chip, CREG, clrwrite); // clear write bit
snd_mtpav_mputreg(chip, CREG, setwrite); // set write bit
}
/*
*/
/* call this with spin lock held */
static void snd_mtpav_output_port_write(struct mtpav *mtp_card,
struct mtpav_port *portp,
struct snd_rawmidi_substream *substream)
{
u8 outbyte;
// Get the outbyte first, so we can emulate running status if
// necessary
if (snd_rawmidi_transmit(substream, &outbyte, 1) != 1)
return;
// send port change command if necessary
if (portp->hwport != mtp_card->outmidihwport) {
mtp_card->outmidihwport = portp->hwport;
snd_mtpav_send_byte(mtp_card, 0xf5);
snd_mtpav_send_byte(mtp_card, portp->hwport);
//snd_printk("new outport: 0x%x\n", (unsigned int) portp->hwport);
if (!(outbyte & 0x80) && portp->running_status)
snd_mtpav_send_byte(mtp_card, portp->running_status);
}
// send data
do {
if (outbyte & 0x80)
portp->running_status = outbyte;
snd_mtpav_send_byte(mtp_card, outbyte);
} while (snd_rawmidi_transmit(substream, &outbyte, 1) == 1);
}
static void snd_mtpav_output_write(struct snd_rawmidi_substream *substream)
{
struct mtpav *mtp_card = substream->rmidi->private_data;
struct mtpav_port *portp = &mtp_card->ports[substream->number];
unsigned long flags;
spin_lock_irqsave(&mtp_card->spinlock, flags);
snd_mtpav_output_port_write(mtp_card, portp, substream);
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
}
/*
* mtpav control
*/
static void snd_mtpav_portscan(struct mtpav *chip) // put mtp into smart routing mode
{
u8 p;
for (p = 0; p < 8; p++) {
snd_mtpav_send_byte(chip, 0xf5);
snd_mtpav_send_byte(chip, p);
snd_mtpav_send_byte(chip, 0xfe);
}
}
/*
*/
static int snd_mtpav_input_open(struct snd_rawmidi_substream *substream)
{
struct mtpav *mtp_card = substream->rmidi->private_data;
struct mtpav_port *portp = &mtp_card->ports[substream->number];
unsigned long flags;
spin_lock_irqsave(&mtp_card->spinlock, flags);
portp->mode |= MTPAV_MODE_INPUT_OPENED;
portp->input = substream;
if (mtp_card->share_irq++ == 0)
snd_mtpav_mputreg(mtp_card, CREG, (SIGC_INTEN | SIGC_WRITE)); // enable pport interrupts
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
return 0;
}
/*
*/
static int snd_mtpav_input_close(struct snd_rawmidi_substream *substream)
{
struct mtpav *mtp_card = substream->rmidi->private_data;
struct mtpav_port *portp = &mtp_card->ports[substream->number];
unsigned long flags;
spin_lock_irqsave(&mtp_card->spinlock, flags);
portp->mode &= ~MTPAV_MODE_INPUT_OPENED;
portp->input = NULL;
if (--mtp_card->share_irq == 0)
snd_mtpav_mputreg(mtp_card, CREG, 0); // disable pport interrupts
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
return 0;
}
/*
*/
static void snd_mtpav_input_trigger(struct snd_rawmidi_substream *substream, int up)
{
struct mtpav *mtp_card = substream->rmidi->private_data;
struct mtpav_port *portp = &mtp_card->ports[substream->number];
unsigned long flags;
spin_lock_irqsave(&mtp_card->spinlock, flags);
if (up)
portp->mode |= MTPAV_MODE_INPUT_TRIGGERED;
else
portp->mode &= ~MTPAV_MODE_INPUT_TRIGGERED;
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
}
/*
* timer interrupt for outputs
*/
static void snd_mtpav_output_timer(unsigned long data)
{
unsigned long flags;
struct mtpav *chip = (struct mtpav *)data;
int p;
spin_lock_irqsave(&chip->spinlock, flags);
/* reprogram timer */
chip->timer.expires = 1 + jiffies;
add_timer(&chip->timer);
/* process each port */
for (p = 0; p <= chip->num_ports * 2 + MTPAV_PIDX_BROADCAST; p++) {
struct mtpav_port *portp = &chip->ports[p];
if ((portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED) && portp->output)
snd_mtpav_output_port_write(chip, portp, portp->output);
}
spin_unlock_irqrestore(&chip->spinlock, flags);
}
/* spinlock held! */
static void snd_mtpav_add_output_timer(struct mtpav *chip)
{
chip->timer.expires = 1 + jiffies;
add_timer(&chip->timer);
}
/* spinlock held! */
static void snd_mtpav_remove_output_timer(struct mtpav *chip)
{
del_timer(&chip->timer);
}
/*
*/
static int snd_mtpav_output_open(struct snd_rawmidi_substream *substream)
{
struct mtpav *mtp_card = substream->rmidi->private_data;
struct mtpav_port *portp = &mtp_card->ports[substream->number];
unsigned long flags;
spin_lock_irqsave(&mtp_card->spinlock, flags);
portp->mode |= MTPAV_MODE_OUTPUT_OPENED;
portp->output = substream;
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
return 0;
};
/*
*/
static int snd_mtpav_output_close(struct snd_rawmidi_substream *substream)
{
struct mtpav *mtp_card = substream->rmidi->private_data;
struct mtpav_port *portp = &mtp_card->ports[substream->number];
unsigned long flags;
spin_lock_irqsave(&mtp_card->spinlock, flags);
portp->mode &= ~MTPAV_MODE_OUTPUT_OPENED;
portp->output = NULL;
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
return 0;
};
/*
*/
static void snd_mtpav_output_trigger(struct snd_rawmidi_substream *substream, int up)
{
struct mtpav *mtp_card = substream->rmidi->private_data;
struct mtpav_port *portp = &mtp_card->ports[substream->number];
unsigned long flags;
spin_lock_irqsave(&mtp_card->spinlock, flags);
if (up) {
if (! (portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED)) {
if (mtp_card->istimer++ == 0)
snd_mtpav_add_output_timer(mtp_card);
portp->mode |= MTPAV_MODE_OUTPUT_TRIGGERED;
}
} else {
portp->mode &= ~MTPAV_MODE_OUTPUT_TRIGGERED;
if (--mtp_card->istimer == 0)
snd_mtpav_remove_output_timer(mtp_card);
}
spin_unlock_irqrestore(&mtp_card->spinlock, flags);
if (up)
snd_mtpav_output_write(substream);
}
/*
* midi interrupt for inputs
*/
static void snd_mtpav_inmidi_process(struct mtpav *mcrd, u8 inbyte)
{
struct mtpav_port *portp;
if ((int)mcrd->inmidiport > mcrd->num_ports * 2 + MTPAV_PIDX_BROADCAST)
return;
portp = &mcrd->ports[mcrd->inmidiport];
if (portp->mode & MTPAV_MODE_INPUT_TRIGGERED)
snd_rawmidi_receive(portp->input, &inbyte, 1);
}
static void snd_mtpav_inmidi_h(struct mtpav *mcrd, u8 inbyte)
{
if (inbyte >= 0xf8) {
/* real-time midi code */
snd_mtpav_inmidi_process(mcrd, inbyte);
return;
}
if (mcrd->inmidistate == 0) { // awaiting command
if (inbyte == 0xf5) // MTP port #
mcrd->inmidistate = 1;
else
snd_mtpav_inmidi_process(mcrd, inbyte);
} else if (mcrd->inmidistate) {
mcrd->inmidiport = translate_hwport_to_subdevice(mcrd, inbyte);
mcrd->inmidistate = 0;
}
}
static void snd_mtpav_read_bytes(struct mtpav *mcrd)
{
u8 clrread, setread;
u8 mtp_read_byte;
u8 sr, cbyt;
int i;
u8 sbyt = snd_mtpav_getreg(mcrd, SREG);
//printk("snd_mtpav_read_bytes() sbyt: 0x%x\n", sbyt);
if (!(sbyt & SIGS_BYTE))
return;
cbyt = snd_mtpav_getreg(mcrd, CREG);
clrread = cbyt & (SIGC_READ ^ 0xff);
setread = cbyt | SIGC_READ;
do {
mtp_read_byte = 0;
for (i = 0; i < 4; i++) {
snd_mtpav_mputreg(mcrd, CREG, setread);
sr = snd_mtpav_getreg(mcrd, SREG);
snd_mtpav_mputreg(mcrd, CREG, clrread);
sr &= SIGS_IN0 | SIGS_IN1;
sr >>= 4;
mtp_read_byte |= sr << (i * 2);
}
snd_mtpav_inmidi_h(mcrd, mtp_read_byte);
sbyt = snd_mtpav_getreg(mcrd, SREG);
} while (sbyt & SIGS_BYTE);
}
static irqreturn_t snd_mtpav_irqh(int irq, void *dev_id)
{
struct mtpav *mcard = dev_id;
spin_lock(&mcard->spinlock);
snd_mtpav_read_bytes(mcard);
spin_unlock(&mcard->spinlock);
return IRQ_HANDLED;
}
/*
* get ISA resources
*/
static int __init snd_mtpav_get_ISA(struct mtpav * mcard)
{
if ((mcard->res_port = request_region(port, 3, "MotuMTPAV MIDI")) == NULL) {
snd_printk("MTVAP port 0x%lx is busy\n", port);
return -EBUSY;
}
mcard->port = port;
if (request_irq(irq, snd_mtpav_irqh, IRQF_DISABLED, "MOTU MTPAV", mcard)) {
snd_printk("MTVAP IRQ %d busy\n", irq);
return -EBUSY;
}
mcard->irq = irq;
return 0;
}
/*
*/
static struct snd_rawmidi_ops snd_mtpav_output = {
.open = snd_mtpav_output_open,
.close = snd_mtpav_output_close,
.trigger = snd_mtpav_output_trigger,
};
static struct snd_rawmidi_ops snd_mtpav_input = {
.open = snd_mtpav_input_open,
.close = snd_mtpav_input_close,
.trigger = snd_mtpav_input_trigger,
};
/*
* get RAWMIDI resources
*/
static void __init snd_mtpav_set_name(struct mtpav *chip,
struct snd_rawmidi_substream *substream)
{
if (substream->number >= 0 && substream->number < chip->num_ports)
sprintf(substream->name, "MTP direct %d", (substream->number % chip->num_ports) + 1);
else if (substream->number >= 8 && substream->number < chip->num_ports * 2)
sprintf(substream->name, "MTP remote %d", (substream->number % chip->num_ports) + 1);
else if (substream->number == chip->num_ports * 2)
strcpy(substream->name, "MTP computer");
else if (substream->number == chip->num_ports * 2 + 1)
strcpy(substream->name, "MTP ADAT");
else
strcpy(substream->name, "MTP broadcast");
}
static int __init snd_mtpav_get_RAWMIDI(struct mtpav *mcard)
{
int rval;
struct snd_rawmidi *rawmidi;
struct snd_rawmidi_substream *substream;
struct list_head *list;
if (hwports < 1)
hwports = 1;
else if (hwports > 8)
hwports = 8;
mcard->num_ports = hwports;
if ((rval = snd_rawmidi_new(mcard->card, "MotuMIDI", 0,
mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
&mcard->rmidi)) < 0)
return rval;
rawmidi = mcard->rmidi;
rawmidi->private_data = mcard;
list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
substream = list_entry(list, struct snd_rawmidi_substream, list);
snd_mtpav_set_name(mcard, substream);
substream->ops = &snd_mtpav_input;
}
list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
substream = list_entry(list, struct snd_rawmidi_substream, list);
snd_mtpav_set_name(mcard, substream);
substream->ops = &snd_mtpav_output;
mcard->ports[substream->number].hwport = translate_subdevice_to_hwport(mcard, substream->number);
}
rawmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT |
SNDRV_RAWMIDI_INFO_DUPLEX;
sprintf(rawmidi->name, "MTP AV MIDI");
return 0;
}
/*
*/
static void snd_mtpav_free(struct snd_card *card)
{
struct mtpav *crd = card->private_data;
unsigned long flags;
spin_lock_irqsave(&crd->spinlock, flags);
if (crd->istimer > 0)
snd_mtpav_remove_output_timer(crd);
spin_unlock_irqrestore(&crd->spinlock, flags);
if (crd->irq >= 0)
free_irq(crd->irq, (void *)crd);
release_and_free_resource(crd->res_port);
}
/*
*/
static int __init snd_mtpav_probe(struct platform_device *dev)
{
struct snd_card *card;
int err;
struct mtpav *mtp_card;
card = snd_card_new(index, id, THIS_MODULE, sizeof(*mtp_card));
if (! card)
return -ENOMEM;
mtp_card = card->private_data;
spin_lock_init(&mtp_card->spinlock);
init_timer(&mtp_card->timer);
mtp_card->card = card;
mtp_card->irq = -1;
mtp_card->share_irq = 0;
mtp_card->inmidiport = 0xffffffff;
mtp_card->inmidistate = 0;
mtp_card->outmidihwport = 0xffffffff;
init_timer(&mtp_card->timer);
mtp_card->timer.function = snd_mtpav_output_timer;
mtp_card->timer.data = (unsigned long) mtp_card;
card->private_free = snd_mtpav_free;
err = snd_mtpav_get_ISA(mtp_card);
if (err < 0)
goto __error;
strcpy(card->driver, "MTPAV");
strcpy(card->shortname, "MTPAV on parallel port");
snprintf(card->longname, sizeof(card->longname),
"MTPAV on parallel port at 0x%lx", port);
err = snd_mtpav_get_RAWMIDI(mtp_card);
if (err < 0)
goto __error;
snd_mtpav_portscan(mtp_card);
snd_card_set_dev(card, &dev->dev);
err = snd_card_register(mtp_card->card);
if (err < 0)
goto __error;
platform_set_drvdata(dev, card);
printk(KERN_INFO "Motu MidiTimePiece on parallel port irq: %d ioport: 0x%lx\n", irq, port);
return 0;
__error:
snd_card_free(card);
return err;
}
static int snd_mtpav_remove(struct platform_device *devptr)
{
snd_card_free(platform_get_drvdata(devptr));
platform_set_drvdata(devptr, NULL);
return 0;
}
#define SND_MTPAV_DRIVER "snd_mtpav"
static struct platform_driver snd_mtpav_driver = {
.probe = snd_mtpav_probe,
.remove = snd_mtpav_remove,
.driver = {
.name = SND_MTPAV_DRIVER
},
};
static int __init alsa_card_mtpav_init(void)
{
int err;
if ((err = platform_driver_register(&snd_mtpav_driver)) < 0)
return err;
device = platform_device_register_simple(SND_MTPAV_DRIVER, -1, NULL, 0);
if (!IS_ERR(device)) {
if (platform_get_drvdata(device))
return 0;
platform_device_unregister(device);
err = -ENODEV;
} else
err = PTR_ERR(device);
platform_driver_unregister(&snd_mtpav_driver);
return err;
}
static void __exit alsa_card_mtpav_exit(void)
{
platform_device_unregister(device);
platform_driver_unregister(&snd_mtpav_driver);
}
module_init(alsa_card_mtpav_init)
module_exit(alsa_card_mtpav_exit)
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