/* * Copyright (c) by Jaroslav Kysela * 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 #include #include #include #include #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 return 0; } /* End of file */