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
snd_vortex_midi(vortex_t * vortex)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
