LXR linux/sound/pci/au88x0/au88x0

   1/*
   2 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   3 *  Routines for control of MPU-401 in UART mode
   4 *
   5 *   Modified for the Aureal Vortex based Soundcards
   6 *   by Manuel Jander (mjande@embedded.cl).
   7 *
   8 *   This program is free software; you can redistribute it and/or modify
   9 *   it under the terms of the GNU General Public License as published by
  10 *   the Free Software Foundation; either version 2 of the License, or
  11 *   (at your option) any later version.
  12 *
  13 *   This program is distributed in the hope that it will be useful,
  14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 *   GNU General Public License for more details.
  17 *
  18 *   You should have received a copy of the GNU General Public License
  19 *   along with this program; if not, write to the Free Software
  20 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21 *
  22 */
  23
  24#include <linux/time.h>
  25#include <linux/init.h>
  26#include <sound/core.h>
  27#include <sound/mpu401.h>
  28#include "au88x0.h"
  29
  30/* Check for mpu401 mmio support. */
  31/* MPU401 legacy support is only provided as a emergency fallback *
  32 * for older versions of ALSA. Its usage is strongly discouraged. */
  33#ifndef MPU401_HW_AUREAL
  34#define VORTEX_MPU401_LEGACY
  35#endif
  36
  37/* Vortex MPU401 defines. */
  38#define MIDI_CLOCK_DIV      0x61
  39/* Standart MPU401 defines. */
  40#define MPU401_RESET            0xff
  41#define MPU401_ENTER_UART       0x3f
  42#define MPU401_ACK                  0xfe
  43
  44static int snd_vortex_midi(vortex_t *vortex)
  45{
  46        struct snd_rawmidi *rmidi;
  47        int temp, mode;
  48        struct snd_mpu401 *mpu;
  49        unsigned long port;
  50
  51#ifdef VORTEX_MPU401_LEGACY
  52        /* EnableHardCodedMPU401Port() */
  53        /* Enable Legacy MIDI Interface port. */
  54        port = (0x03 << 5);     /* FIXME: static address. 0x330 */
  55        temp =
  56            (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) |
  57            CTRL_MIDI_EN | port;
  58        hwwrite(vortex->mmio, VORTEX_CTRL, temp);
  59#else
  60        /* Disable Legacy MIDI Interface port. */
  61        temp =
  62            (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) &
  63            ~CTRL_MIDI_EN;
  64        hwwrite(vortex->mmio, VORTEX_CTRL, temp);
  65#endif
  66        /* Mpu401UartInit() */
  67        mode = 1;
  68        temp = hwread(vortex->mmio, VORTEX_CTRL2) & 0xffff00cf;
  69        temp |= (MIDI_CLOCK_DIV << 8) | ((mode >> 24) & 0xff) << 4;
  70        hwwrite(vortex->mmio, VORTEX_CTRL2, temp);
  71        hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_RESET);
  72
  73        /* Check if anything is OK. */
  74        temp = hwread(vortex->mmio, VORTEX_MIDI_DATA);
  75        if (temp != MPU401_ACK /*0xfe */ ) {
  76                dev_err(vortex->card->dev, "midi port doesn't acknowledge!\n");
  77                return -ENODEV;
  78        }
  79        /* Enable MPU401 interrupts. */
  80        hwwrite(vortex->mmio, VORTEX_IRQ_CTRL,
  81                hwread(vortex->mmio, VORTEX_IRQ_CTRL) | IRQ_MIDI);
  82
  83        /* Create MPU401 instance. */
  84#ifdef VORTEX_MPU401_LEGACY
  85        if ((temp =
  86             snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_MPU401, 0x330,
  87                                 MPU401_INFO_IRQ_HOOK, -1, &rmidi)) != 0) {
  88                hwwrite(vortex->mmio, VORTEX_CTRL,
  89                        (hwread(vortex->mmio, VORTEX_CTRL) &
  90                         ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
  91                return temp;
  92        }
  93#else
  94        port = (unsigned long)(vortex->mmio + VORTEX_MIDI_DATA);
  95        if ((temp =
  96             snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port,
  97                                 MPU401_INFO_INTEGRATED | MPU401_INFO_MMIO |
  98                                 MPU401_INFO_IRQ_HOOK, -1, &rmidi)) != 0) {
  99                hwwrite(vortex->mmio, VORTEX_CTRL,
 100                        (hwread(vortex->mmio, VORTEX_CTRL) &
 101                         ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
 102                return temp;
 103        }
 104        mpu = rmidi->private_data;
 105        mpu->cport = (unsigned long)(vortex->mmio + VORTEX_MIDI_CMD);
 106#endif
 107        /* Overwrite MIDI name */
 108        snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI %d", CARD_NAME_SHORT , vortex->card->number);
 109
 110        vortex->rmidi = rmidi;
 111        return 0;
 112}
 113