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 __devinit 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		printk(KERN_ERR "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}