1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4*4882a593Smuzhiyun * Routines for control of MPU-401 in UART mode
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Modified for the Aureal Vortex based Soundcards
7*4882a593Smuzhiyun * by Manuel Jander (mjande@embedded.cl).
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/time.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <sound/core.h>
13*4882a593Smuzhiyun #include <sound/mpu401.h>
14*4882a593Smuzhiyun #include "au88x0.h"
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun /* Check for mpu401 mmio support. */
17*4882a593Smuzhiyun /* MPU401 legacy support is only provided as a emergency fallback *
18*4882a593Smuzhiyun * for older versions of ALSA. Its usage is strongly discouraged. */
19*4882a593Smuzhiyun #ifndef MPU401_HW_AUREAL
20*4882a593Smuzhiyun #define VORTEX_MPU401_LEGACY
21*4882a593Smuzhiyun #endif
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun /* Vortex MPU401 defines. */
24*4882a593Smuzhiyun #define MIDI_CLOCK_DIV 0x61
25*4882a593Smuzhiyun /* Standart MPU401 defines. */
26*4882a593Smuzhiyun #define MPU401_RESET 0xff
27*4882a593Smuzhiyun #define MPU401_ENTER_UART 0x3f
28*4882a593Smuzhiyun #define MPU401_ACK 0xfe
29*4882a593Smuzhiyun
snd_vortex_midi(vortex_t * vortex)30*4882a593Smuzhiyun static int snd_vortex_midi(vortex_t *vortex)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun struct snd_rawmidi *rmidi;
33*4882a593Smuzhiyun int temp, mode;
34*4882a593Smuzhiyun struct snd_mpu401 *mpu;
35*4882a593Smuzhiyun unsigned long port;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun #ifdef VORTEX_MPU401_LEGACY
38*4882a593Smuzhiyun /* EnableHardCodedMPU401Port() */
39*4882a593Smuzhiyun /* Enable Legacy MIDI Interface port. */
40*4882a593Smuzhiyun port = (0x03 << 5); /* FIXME: static address. 0x330 */
41*4882a593Smuzhiyun temp =
42*4882a593Smuzhiyun (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) |
43*4882a593Smuzhiyun CTRL_MIDI_EN | port;
44*4882a593Smuzhiyun hwwrite(vortex->mmio, VORTEX_CTRL, temp);
45*4882a593Smuzhiyun #else
46*4882a593Smuzhiyun /* Disable Legacy MIDI Interface port. */
47*4882a593Smuzhiyun temp =
48*4882a593Smuzhiyun (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) &
49*4882a593Smuzhiyun ~CTRL_MIDI_EN;
50*4882a593Smuzhiyun hwwrite(vortex->mmio, VORTEX_CTRL, temp);
51*4882a593Smuzhiyun #endif
52*4882a593Smuzhiyun /* Mpu401UartInit() */
53*4882a593Smuzhiyun mode = 1;
54*4882a593Smuzhiyun temp = hwread(vortex->mmio, VORTEX_CTRL2) & 0xffff00cf;
55*4882a593Smuzhiyun temp |= (MIDI_CLOCK_DIV << 8) | ((mode >> 24) & 0xff) << 4;
56*4882a593Smuzhiyun hwwrite(vortex->mmio, VORTEX_CTRL2, temp);
57*4882a593Smuzhiyun hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_RESET);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun /* Check if anything is OK. */
60*4882a593Smuzhiyun temp = hwread(vortex->mmio, VORTEX_MIDI_DATA);
61*4882a593Smuzhiyun if (temp != MPU401_ACK /*0xfe */ ) {
62*4882a593Smuzhiyun dev_err(vortex->card->dev, "midi port doesn't acknowledge!\n");
63*4882a593Smuzhiyun return -ENODEV;
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun /* Enable MPU401 interrupts. */
66*4882a593Smuzhiyun hwwrite(vortex->mmio, VORTEX_IRQ_CTRL,
67*4882a593Smuzhiyun hwread(vortex->mmio, VORTEX_IRQ_CTRL) | IRQ_MIDI);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun /* Create MPU401 instance. */
70*4882a593Smuzhiyun #ifdef VORTEX_MPU401_LEGACY
71*4882a593Smuzhiyun if ((temp =
72*4882a593Smuzhiyun snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_MPU401, 0x330,
73*4882a593Smuzhiyun MPU401_INFO_IRQ_HOOK, -1, &rmidi)) != 0) {
74*4882a593Smuzhiyun hwwrite(vortex->mmio, VORTEX_CTRL,
75*4882a593Smuzhiyun (hwread(vortex->mmio, VORTEX_CTRL) &
76*4882a593Smuzhiyun ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
77*4882a593Smuzhiyun return temp;
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun #else
80*4882a593Smuzhiyun port = (unsigned long)(vortex->mmio + VORTEX_MIDI_DATA);
81*4882a593Smuzhiyun if ((temp =
82*4882a593Smuzhiyun snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port,
83*4882a593Smuzhiyun MPU401_INFO_INTEGRATED | MPU401_INFO_MMIO |
84*4882a593Smuzhiyun MPU401_INFO_IRQ_HOOK, -1, &rmidi)) != 0) {
85*4882a593Smuzhiyun hwwrite(vortex->mmio, VORTEX_CTRL,
86*4882a593Smuzhiyun (hwread(vortex->mmio, VORTEX_CTRL) &
87*4882a593Smuzhiyun ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
88*4882a593Smuzhiyun return temp;
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun mpu = rmidi->private_data;
91*4882a593Smuzhiyun mpu->cport = (unsigned long)(vortex->mmio + VORTEX_MIDI_CMD);
92*4882a593Smuzhiyun #endif
93*4882a593Smuzhiyun /* Overwrite MIDI name */
94*4882a593Smuzhiyun snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI %d", CARD_NAME_SHORT , vortex->card->number);
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun vortex->rmidi = rmidi;
97*4882a593Smuzhiyun return 0;
98*4882a593Smuzhiyun }
99