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 44 static 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