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