/*
        Copyright 1999, Be Incorporated.   All Rights Reserved.
        This file may be used under the terms of the Be Sample Code License.
*/

#include <string.h>
#include <stdlib.h>
#include <signal.h>

#include "cm_private.h"


extern void dump_card(cmedia_pci_dev * card);

#if !defined(_KERNEL_EXPORT_H)
#include <KernelExport.h>
#endif /* _KERNEL_EXPORT_H */

#define MIDI_ACTIVE_SENSE 0xfe
#define SNOOZE_GRANULARITY 500

extern generic_mpu401_module * mpu401;

void
midi_interrupt_op(
        int32 op,
        void * data)
{
        midi_dev * port = (midi_dev *)data;
        ddprintf(("port = %p\n", port));
        if (op == B_MPU_401_ENABLE_CARD_INT) {
                cpu_status cp;
                ddprintf(("cmedia_pci: B_MPU_401_ENABLE_CARD_INT\n"));
                cp = disable_interrupts();
                acquire_spinlock(&port->card->hardware);
                increment_interrupt_handler(port->card);
                set_direct(port->card, 0x01, 0x00, 0x80);
                set_indirect(port->card, 0x2A, 0x04, 0xff);
                release_spinlock(&port->card->hardware);
                restore_interrupts(cp);
        }
        else if (op == B_MPU_401_DISABLE_CARD_INT) {
                /* turn off MPU interrupts */
                cpu_status cp;
                ddprintf(("cmedia_pci: B_MPU_401_DISABLE_CARD_INT\n"));
                cp = disable_interrupts();
                acquire_spinlock(&port->card->hardware);
                set_direct(port->card, 0x01, 0x80, 0x80);
                /* remove interrupt handler if necessary */
                decrement_interrupt_handler(port->card);
                release_spinlock(&port->card->hardware);
                restore_interrupts(cp);
        }
        ddprintf(("cmedia_pci: midi_interrupt_op() done\n"));
}

static status_t midi_open(const char *name, uint32 flags, void **cookie);
static status_t midi_close(void *cookie);
static status_t midi_free(void *cookie);
static status_t midi_control(void *cookie, uint32 op, void *data, size_t len);
static status_t midi_read(void *cookie, off_t pos, void *data, size_t *len);
static status_t midi_write(void *cookie, off_t pos, const void *data, size_t *len);


device_hooks midi_hooks = {
    &midi_open,
    &midi_close,
    &midi_free,
    &midi_control,
    &midi_read,
    &midi_write,
    NULL,               /* select */
    NULL,               /* deselect */
    NULL,               /* readv */
    NULL                /* writev */
};

static status_t
midi_open(
        const char * name,
        uint32 flags,
        void ** cookie)
{
        int ix;
        int ret;

        ddprintf(("cmedia_pci: midi_open()\n"));

        *cookie = NULL;
        for (ix=0; ix<num_cards; ix++) {
                if (!strcmp(name, cards[ix].midi.name)) {
                        break;
                }
        }
        if (ix >= num_cards) {
                ddprintf(("bad device\n"));
                return ENODEV;
        }

        ddprintf(("cmedia_pci: mpu401: %p  open(): %p  driver: %p\n", mpu401, mpu401->open_hook, cards[ix].midi.driver));
        ret = (*mpu401->open_hook)(cards[ix].midi.driver, flags, cookie);
        if (ret >= B_OK) {
                cards[ix].midi.cookie = *cookie;
                atomic_add(&cards[ix].midi.count, 1);
        }
        ddprintf(("cmedia_pci: mpu401: open returns %x / %p\n", ret, *cookie));
        return ret;
}


static status_t
midi_close(
        void * cookie)
{
        ddprintf(("cmedia_pci: midi_close()\n"));
        return (*mpu401->close_hook)(cookie);
}


static status_t
midi_free(
        void * cookie)
{
        int ix;
        status_t f;
        ddprintf(("cmedia_pci: midi_free()\n"));
        f = (*mpu401->free_hook)(cookie);
        for (ix=0; ix<num_cards; ix++) {
                if (cards[ix].midi.cookie == cookie) {
                        if (atomic_add(&cards[ix].midi.count, -1) == 1) {
                                cards[ix].midi.cookie = NULL;
                                ddprintf(("cleared %p card %d\n", cookie, ix));
                        }
                        break;
                }
        }
        ddprintf(("cmedia_pci: midi_free() done\n"));
        return f;
}


static status_t
midi_control(
        void * cookie,
        uint32 iop,
        void * data,
        size_t len)
{
        return (*mpu401->control_hook)(cookie, iop, data, len);
}


static status_t
midi_read(
        void * cookie,
        off_t pos,
        void * ptr,
        size_t * nread)
{
        return (*mpu401->read_hook)(cookie, pos, ptr, nread);
}


static status_t
midi_write(
        void * cookie,
        off_t pos,
        const void * ptr,
        size_t * nwritten)
{
        return (*mpu401->write_hook)(cookie, pos, ptr, nwritten);
}


bool
midi_interrupt(
        cmedia_pci_dev * dev)
{
        if (!dev->midi.driver)  {
//              kprintf("aiigh\n");
                return false;
        }
        
        return (*mpu401->interrupt_hook)(dev->midi.driver);
}