2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
3 * Routines for control of MPU-401 in UART mode
5 * Modified for the Aureal Vortex based Soundcards
6 * by Manuel Jander (mjande@embedded.cl).
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.
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.
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
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>
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
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
45 static int __devinit snd_vortex_midi(vortex_t * vortex)
47 struct snd_rawmidi *rmidi;
49 struct snd_mpu401 *mpu;
52 #ifdef VORTEX_MPU401_LEGACY
53 /* EnableHardCodedMPU401Port() */
54 /* Enable Legacy MIDI Interface port. */
55 port = (0x03 << 5); /* FIXME: static address. 0x330 */
57 (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) |
59 hwwrite(vortex->mmio, VORTEX_CTRL, temp);
61 /* Disable Legacy MIDI Interface port. */
63 (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) &
65 hwwrite(vortex->mmio, VORTEX_CTRL, temp);
67 /* Mpu401UartInit() */
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 /* Set some kind of mode */
75 hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_ENTER_UART);
77 /* Check if anything is OK. */
78 temp = hwread(vortex->mmio, VORTEX_MIDI_DATA);
79 if (temp != MPU401_ACK /*0xfe */ ) {
80 printk(KERN_ERR "midi port doesn't acknowledge!\n");
83 /* Enable MPU401 interrupts. */
84 hwwrite(vortex->mmio, VORTEX_IRQ_CTRL,
85 hwread(vortex->mmio, VORTEX_IRQ_CTRL) | IRQ_MIDI);
87 /* Create MPU401 instance. */
88 #ifdef VORTEX_MPU401_LEGACY
90 snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_MPU401, 0x330,
91 0, 0, 0, &rmidi)) != 0) {
92 hwwrite(vortex->mmio, VORTEX_CTRL,
93 (hwread(vortex->mmio, VORTEX_CTRL) &
94 ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
98 port = (unsigned long)(vortex->mmio + VORTEX_MIDI_DATA);
100 snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port,
101 1, 0, 0, &rmidi)) != 0) {
102 hwwrite(vortex->mmio, VORTEX_CTRL,
103 (hwread(vortex->mmio, VORTEX_CTRL) &
104 ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
107 mpu = rmidi->private_data;
108 mpu->cport = (unsigned long)(vortex->mmio + VORTEX_MIDI_CMD);
110 vortex->rmidi = rmidi;