1 /* 2 * Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h> 25 #include <linux/time.h> 26 #include <linux/init.h> 27 #include <sound/core.h> 28 #include <sound/mpu401.h> 29 #include "au88x0.h" 30 31 /* Check for mpu401 mmio support. */ 32 /* MPU401 legacy support is only provided as a emergency fallback * 33 * for older versions of ALSA. Its usage is strongly discouraged. */ 34 #ifndef MPU401_HW_AUREAL 35 #define VORTEX_MPU401_LEGACY 36 #endif 37 38 /* Vortex MPU401 defines. */ 39 #define MIDI_CLOCK_DIV 0x61 40 /* Standart MPU401 defines. */ 41 #define MPU401_RESET 0xff 42 #define MPU401_ENTER_UART 0x3f 43 #define MPU401_ACK 0xfe 44 45 static int __devinit snd_vortex_midi(vortex_t * vortex) 46 { 47 struct snd_rawmidi *rmidi; 48 int temp, mode; 49 struct snd_mpu401 *mpu; 50 unsigned long port; 51 52 #ifdef VORTEX_MPU401_LEGACY 53 /* EnableHardCodedMPU401Port() */ 54 /* Enable Legacy MIDI Interface port. */ 55 port = (0x03 << 5); /* FIXME: static address. 0x330 */ 56 temp = 57 (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) | 58 CTRL_MIDI_EN | port; 59 hwwrite(vortex->mmio, VORTEX_CTRL, temp); 60 #else 61 /* Disable Legacy MIDI Interface port. */ 62 temp = 63 (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) & 64 ~CTRL_MIDI_EN; 65 hwwrite(vortex->mmio, VORTEX_CTRL, temp); 66 #endif 67 /* Mpu401UartInit() */ 68 mode = 1; 69 temp = hwread(vortex->mmio, VORTEX_CTRL2) & 0xffff00cf; 70 temp |= (MIDI_CLOCK_DIV << 8) | ((mode >> 24) & 0xff) << 4; 71 hwwrite(vortex->mmio, VORTEX_CTRL2, temp); 72 hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_RESET); 73 74 /* Check if anything is OK. */ 75 temp = hwread(vortex->mmio, VORTEX_MIDI_DATA); 76 if (temp != MPU401_ACK /*0xfe */ ) { 77 printk(KERN_ERR "midi port doesn't acknowledge!\n"); 78 return -ENODEV; 79 } 80 /* Enable MPU401 interrupts. */ 81 hwwrite(vortex->mmio, VORTEX_IRQ_CTRL, 82 hwread(vortex->mmio, VORTEX_IRQ_CTRL) | IRQ_MIDI); 83 84 /* Create MPU401 instance. */ 85 #ifdef VORTEX_MPU401_LEGACY 86 if ((temp = 87 snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_MPU401, 0x330, 88 0, 0, 0, &rmidi)) != 0) { 89 hwwrite(vortex->mmio, VORTEX_CTRL, 90 (hwread(vortex->mmio, VORTEX_CTRL) & 91 ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN); 92 return temp; 93 } 94 #else 95 port = (unsigned long)(vortex->mmio + VORTEX_MIDI_DATA); 96 if ((temp = 97 snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port, 98 MPU401_INFO_INTEGRATED | MPU401_INFO_MMIO, 99 0, 0, &rmidi)) != 0) { 100 hwwrite(vortex->mmio, VORTEX_CTRL, 101 (hwread(vortex->mmio, VORTEX_CTRL) & 102 ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN); 103 return temp; 104 } 105 mpu = rmidi->private_data; 106 mpu->cport = (unsigned long)(vortex->mmio + VORTEX_MIDI_CMD); 107 #endif 108 /* Overwrite MIDI name */ 109 snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI %d", CARD_NAME_SHORT , vortex->card->number); 110 111 vortex->rmidi = rmidi; 112 return 0; 113 } 114