/[openvortex]/alsa/pci/au88x0/au88x0_mpu401.c
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revision 1.3 by mjander, Sat Apr 26 01:17:23 2003 UTC revision 1.4 by mjander, Thu Aug 7 01:58:51 2003 UTC
# Line 1  Line 1 
1  /*  #define __NO_VERSION__
2   *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>  #include "../../alsa-kernel/pci/au88x0/au88x0_mpu401.c"
  *  Routines for control of MPU-401 in UART mode  
  *  
  *   Modified for the Aureal Vortex based Soundcards  
  *   by Manuel Jander (mjande@embedded.cl).  
  *  
  *   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  
  *  
  */  
3    
 #include <sound/driver.h>  
 #include <linux/time.h>  
 #include <linux/init.h>  
 #include <sound/core.h>  
 #include <sound/mpu401.h>  
 #include "au88x0.h"  
   
 /* Check for mpu401 mmio support. */  
 /* MPU401 legacy support is only provided as a emergency fallback *  
  * for older versions of ALSA. Its usage is strongly discouraged. */  
 #ifndef MPU401_HW_AUREAL  
 #define VORTEX_MPU401_LEGACY  
 #endif  
   
 /* Vortex MPU401 defines. */  
 #define MIDI_CLOCK_DIV      0x61  
 /* Standart MPU401 defines. */  
 #define MPU401_RESET            0xff  
 #define MPU401_ENTER_UART       0x3f  
 #define MPU401_ACK                  0xfe  
   
 int __devinit snd_vortex_midi(vortex_t *vortex) {  
         snd_rawmidi_t *rmidi;  
         int temp, mode;  
     mpu401_t *mpu;  
     int port;  
   
 #ifdef VORTEX_MPU401_LEGACY  
     /* EnableHardCodedMPU401Port() */  
     port  = (0x03 << 5); /* FIXME: static address. 0x330,0x331 */  
         temp = (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) | CTRL_MIDI_EN | port;  
         hwwrite(vortex->mmio, VORTEX_CTRL, temp);  
 #else  
     /* Enable MIDI Interface. */  
         temp = (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) | CTRL_MIDI_EN;  
         hwwrite(vortex->mmio, VORTEX_CTRL, temp);  
 #endif  
   
         /* Mpu401UartInit() */  
     mode = 1;  
         temp = hwread(vortex->mmio, VORTEX_CTRL2) & 0xffff00cf;  
         temp |= (MIDI_CLOCK_DIV << 8) | ((mode >> 24) & 0xff) << 4;  
         hwwrite(vortex->mmio, VORTEX_CTRL2, temp);  
         hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_RESET);  
         /* Set some kind of mode */  
         if (mode)  
                 hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_ENTER_UART);  
   
         /* Check if anything is OK. */  
         temp = hwread(vortex->mmio, VORTEX_MIDI_DATA);  
         if (temp != MPU401_ACK /*0xfe*/) {  
                 printk(KERN_ERR "midi port doesn't acknowledge!\n");  
                 return -ENODEV;  
         }  
         /* Enable MPU401 interrupts. */  
         hwwrite(vortex->mmio, VORTEX_IRQ_CTRL, hwread(vortex->mmio, VORTEX_IRQ_CTRL) | IRQ_MIDI);  
   
     /* Create MPU401 instance. */  
 #ifdef VORTEX_MPU401_LEGACY  
     if ((temp = snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_MPU401, 0x330, 0, 0, 0, &rmidi)) != 0) {  
             hwwrite(vortex->mmio, VORTEX_CTRL, (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);  
         return temp;  
     }  
 #else  
     port = (unsigned long)(vortex->mmio + (VORTEX_MIDI_DATA >> 2));  
     if ((temp = snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port, 1, 0, 0, &rmidi)) != 0) {  
             hwwrite(vortex->mmio, VORTEX_CTRL, (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);  
         return temp;  
     }  
     mpu = snd_magic_cast(mpu401_t, rmidi->private_data, return -ENOMEM);  
     mpu->cport = (unsigned long)(vortex->mmio + (VORTEX_MIDI_CMD >> 2));  
 #endif  
     vortex->rmidi = rmidi;  
         return 0;  
 }  

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