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/*
**********************************************************************
* cardmo.c - MIDI UART output HAL for emu10k1 driver
* Copyright 1999, 2000 Creative Labs, Inc.
*
**********************************************************************
*
* Date Author Summary of changes
* ---- ------ ------------------
* October 20, 1999 Bertrand Lee base code release
* November 2, 1999 Alan Cox cleaned up
*
**********************************************************************
*
* 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., 675 Mass Ave, Cambridge, MA 02139,
* USA.
*
**********************************************************************
*/
#include <linux/slab.h>
#include "hwaccess.h"
#include "8010.h"
#include "cardmo.h"
#include "irqmgr.h"
/* Installs the IRQ handler for the MPU out port *
* and initialize parameters */
int emu10k1_mpuout_open(struct emu10k1_card *card, struct midi_openinfo *openinfo)
{
struct emu10k1_mpuout *card_mpuout = card->mpuout;
DPF(2, "emu10k1_mpuout_open()\n");
if (!(card_mpuout->status & FLAGS_AVAILABLE))
return -1;
/* Copy open info and mark channel as in use */
card_mpuout->intr = 0;
card_mpuout->openinfo = *openinfo;
card_mpuout->status &= ~FLAGS_AVAILABLE;
card_mpuout->laststatus = 0x80;
card_mpuout->firstmidiq = NULL;
card_mpuout->lastmidiq = NULL;
emu10k1_mpu_reset(card);
emu10k1_mpu_acquire(card);
return 0;
}
int emu10k1_mpuout_close(struct emu10k1_card *card)
{
struct emu10k1_mpuout *card_mpuout = card->mpuout;
struct midi_queue *midiq;
struct midi_hdr *midihdr;
unsigned long flags;
DPF(2, "emu10k1_mpuout_close()\n");
emu10k1_irq_disable(card, INTE_MIDITXENABLE);
spin_lock_irqsave(&card_mpuout->lock, flags);
while (card_mpuout->firstmidiq != NULL) {
midiq = card_mpuout->firstmidiq;
midihdr = (struct midi_hdr *) midiq->refdata;
card_mpuout->firstmidiq = midiq->next;
kfree(midihdr->data);
kfree(midihdr);
kfree(midiq);
}
card_mpuout->lastmidiq = NULL;
emu10k1_mpu_release(card);
card_mpuout->status |= FLAGS_AVAILABLE;
spin_unlock_irqrestore(&card_mpuout->lock, flags);
return 0;
}
/* If there isn't enough buffer space, reject Midi Buffer. *
* Otherwise, disable TX, create object to hold Midi *
* uffer, update buffer flags and other parameters *
* before enabling TX again. */
int emu10k1_mpuout_add_buffer(struct emu10k1_card *card, struct midi_hdr *midihdr)
{
struct emu10k1_mpuout *card_mpuout = card->mpuout;
struct midi_queue *midiq;
unsigned long flags;
DPF(2, "emu10k1_mpuout_add_buffer()\n");
if (card_mpuout->state == CARDMIDIOUT_STATE_SUSPEND)
return 0;
midihdr->flags |= MIDIBUF_INQUEUE;
midihdr->flags &= ~MIDIBUF_DONE;
if ((midiq = (struct midi_queue *) kmalloc(sizeof(struct midi_queue), GFP_KERNEL)) == NULL) {
/* Message lost */
return -1;
}
midiq->next = NULL;
midiq->qtype = 1;
midiq->length = midihdr->bufferlength;
midiq->sizeLeft = midihdr->bufferlength;
midiq->midibyte = midihdr->data;
midiq->refdata = (unsigned long) midihdr;
spin_lock_irqsave(&card_mpuout->lock, flags);
if (card_mpuout->firstmidiq == NULL) {
card_mpuout->firstmidiq = midiq;
card_mpuout->lastmidiq = midiq;
} else {
(card_mpuout->lastmidiq)->next = midiq;
card_mpuout->lastmidiq = midiq;
}
card_mpuout->intr = 0;
emu10k1_irq_enable(card, INTE_MIDITXENABLE);
spin_unlock_irqrestore(&card_mpuout->lock, flags);
return 0;
}
void emu10k1_mpuout_bh(unsigned long refdata)
{
struct emu10k1_card *card = (struct emu10k1_card *) refdata;
struct emu10k1_mpuout *card_mpuout = card->mpuout;
int cByteSent = 0;
struct midi_queue *midiq;
struct midi_queue *doneq = NULL;
unsigned long flags;
spin_lock_irqsave(&card_mpuout->lock, flags);
while (card_mpuout->firstmidiq != NULL) {
midiq = card_mpuout->firstmidiq;
while (cByteSent < 4 && midiq->sizeLeft) {
if (emu10k1_mpu_write_data(card, *midiq->midibyte) < 0) {
DPF(2, "emu10k1_mpuoutDpcCallback error!!\n");
} else {
++cByteSent;
--midiq->sizeLeft;
++midiq->midibyte;
}
}
if (midiq->sizeLeft == 0) {
if (doneq == NULL)
doneq = midiq;
card_mpuout->firstmidiq = midiq->next;
} else
break;
}
if (card_mpuout->firstmidiq == NULL)
card_mpuout->lastmidiq = NULL;
if (doneq != NULL) {
while (doneq != card_mpuout->firstmidiq) {
unsigned long callback_msg[3];
midiq = doneq;
doneq = midiq->next;
if (midiq->qtype) {
callback_msg[0] = 0;
callback_msg[1] = midiq->length;
callback_msg[2] = midiq->refdata;
emu10k1_midi_callback(ICARDMIDI_OUTLONGDATA, card_mpuout->openinfo.refdata, callback_msg);
} else if (((u8) midiq->refdata) < 0xF0 && ((u8) midiq->refdata) > 0x7F)
card_mpuout->laststatus = (u8) midiq->refdata;
kfree(midiq);
}
}
if ((card_mpuout->firstmidiq != NULL) || cByteSent) {
card_mpuout->intr = 0;
emu10k1_irq_enable(card, INTE_MIDITXENABLE);
}
spin_unlock_irqrestore(&card_mpuout->lock, flags);
return;
}
int emu10k1_mpuout_irqhandler(struct emu10k1_card *card)
{
struct emu10k1_mpuout *card_mpuout = card->mpuout;
DPF(4, "emu10k1_mpuout_irqhandler\n");
card_mpuout->intr = 1;
emu10k1_irq_disable(card, INTE_MIDITXENABLE);
tasklet_hi_schedule(&card_mpuout->tasklet);
return 0;
}
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