diff options
Diffstat (limited to 'kernel/sound/drivers/mtpav.c')
| -rw-r--r-- | kernel/sound/drivers/mtpav.c | 787 |
1 files changed, 787 insertions, 0 deletions
diff --git a/kernel/sound/drivers/mtpav.c b/kernel/sound/drivers/mtpav.c new file mode 100644 index 000000000..30e8a1d5b --- /dev/null +++ b/kernel/sound/drivers/mtpav.c @@ -0,0 +1,787 @@ +/* + * 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 <linux/init.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <linux/moduleparam.h> +#include <sound/core.h> +#include <sound/initval.h> +#include <sound/rawmidi.h> +#include <linux/delay.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(KERN_DEBUG "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 */ + mod_timer(&chip->timer, 1 + jiffies); + /* 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) +{ + mod_timer(&chip->timer, 1 + jiffies); +} + +/* 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(KERN_DEBUG "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 snd_mtpav_get_ISA(struct mtpav *mcard) +{ + if ((mcard->res_port = request_region(port, 3, "MotuMTPAV MIDI")) == NULL) { + snd_printk(KERN_ERR "MTVAP port 0x%lx is busy\n", port); + return -EBUSY; + } + mcard->port = port; + if (request_irq(irq, snd_mtpav_irqh, 0, "MOTU MTPAV", mcard)) { + snd_printk(KERN_ERR "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 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 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 snd_mtpav_probe(struct platform_device *dev) +{ + struct snd_card *card; + int err; + struct mtpav *mtp_card; + + err = snd_card_new(&dev->dev, index, id, THIS_MODULE, + sizeof(*mtp_card), &card); + if (err < 0) + return err; + + mtp_card = card->private_data; + spin_lock_init(&mtp_card->spinlock); + mtp_card->card = card; + mtp_card->irq = -1; + mtp_card->share_irq = 0; + mtp_card->inmidistate = 0; + mtp_card->outmidihwport = 0xffffffff; + setup_timer(&mtp_card->timer, snd_mtpav_output_timer, + (unsigned long) mtp_card); + + card->private_free = snd_mtpav_free; + + err = snd_mtpav_get_RAWMIDI(mtp_card); + if (err < 0) + goto __error; + + mtp_card->inmidiport = mtp_card->num_ports + MTPAV_PIDX_BROADCAST; + + 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); + + snd_mtpav_portscan(mtp_card); + + 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)); + 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) |