diff options
Diffstat (limited to 'sound/pci/au88x0/au88x0_mpu401.c')
| -rw-r--r-- | sound/pci/au88x0/au88x0_mpu401.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/sound/pci/au88x0/au88x0_mpu401.c b/sound/pci/au88x0/au88x0_mpu401.c new file mode 100644 index 00000000..e6c6a0fe --- /dev/null +++ b/sound/pci/au88x0/au88x0_mpu401.c @@ -0,0 +1,112 @@ +/* + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + * 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 + * + */ + +#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 + +static int __devinit snd_vortex_midi(vortex_t * vortex) +{ + struct snd_rawmidi *rmidi; + int temp, mode; + struct snd_mpu401 *mpu; + unsigned long port; + +#ifdef VORTEX_MPU401_LEGACY + /* EnableHardCodedMPU401Port() */ + /* Enable Legacy MIDI Interface port. */ + port = (0x03 << 5); /* FIXME: static address. 0x330 */ + temp = + (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) | + CTRL_MIDI_EN | port; + hwwrite(vortex->mmio, VORTEX_CTRL, temp); +#else + /* Disable Legacy MIDI Interface port. */ + 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); + + /* 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, + MPU401_INFO_IRQ_HOOK, -1, &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); + if ((temp = + snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port, + MPU401_INFO_INTEGRATED | MPU401_INFO_MMIO | + MPU401_INFO_IRQ_HOOK, -1, &rmidi)) != 0) { + hwwrite(vortex->mmio, VORTEX_CTRL, + (hwread(vortex->mmio, VORTEX_CTRL) & + ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN); + return temp; + } + mpu = rmidi->private_data; + mpu->cport = (unsigned long)(vortex->mmio + VORTEX_MIDI_CMD); +#endif + /* Overwrite MIDI name */ + snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI %d", CARD_NAME_SHORT , vortex->card->number); + + vortex->rmidi = rmidi; + return 0; +} |