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98 lines
2.9 KiB
98 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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* Routines for control of MPU-401 in UART mode |
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* |
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* Modified for the Aureal Vortex based Soundcards |
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* by Manuel Jander ([email protected]). |
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*/ |
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#include <linux/time.h> |
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#include <linux/init.h> |
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#include <sound/core.h> |
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#include <sound/mpu401.h> |
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#include "au88x0.h" |
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/* Check for mpu401 mmio support. */ |
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/* MPU401 legacy support is only provided as a emergency fallback * |
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* for older versions of ALSA. Its usage is strongly discouraged. */ |
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#ifndef MPU401_HW_AUREAL |
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#define VORTEX_MPU401_LEGACY |
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#endif |
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/* Vortex MPU401 defines. */ |
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#define MIDI_CLOCK_DIV 0x61 |
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/* Standart MPU401 defines. */ |
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#define MPU401_RESET 0xff |
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#define MPU401_ENTER_UART 0x3f |
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#define MPU401_ACK 0xfe |
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static int snd_vortex_midi(vortex_t *vortex) |
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{ |
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struct snd_rawmidi *rmidi; |
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int temp, mode; |
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struct snd_mpu401 *mpu; |
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unsigned long port; |
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#ifdef VORTEX_MPU401_LEGACY |
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/* EnableHardCodedMPU401Port() */ |
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/* Enable Legacy MIDI Interface port. */ |
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port = (0x03 << 5); /* FIXME: static address. 0x330 */ |
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temp = |
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(hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) | |
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CTRL_MIDI_EN | port; |
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hwwrite(vortex->mmio, VORTEX_CTRL, temp); |
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#else |
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/* Disable Legacy MIDI Interface port. */ |
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temp = |
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(hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) & |
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~CTRL_MIDI_EN; |
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hwwrite(vortex->mmio, VORTEX_CTRL, temp); |
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#endif |
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/* Mpu401UartInit() */ |
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mode = 1; |
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temp = hwread(vortex->mmio, VORTEX_CTRL2) & 0xffff00cf; |
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temp |= (MIDI_CLOCK_DIV << 8) | ((mode >> 24) & 0xff) << 4; |
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hwwrite(vortex->mmio, VORTEX_CTRL2, temp); |
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hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_RESET); |
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/* Check if anything is OK. */ |
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temp = hwread(vortex->mmio, VORTEX_MIDI_DATA); |
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if (temp != MPU401_ACK /*0xfe */ ) { |
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dev_err(vortex->card->dev, "midi port doesn't acknowledge!\n"); |
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return -ENODEV; |
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} |
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/* Enable MPU401 interrupts. */ |
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hwwrite(vortex->mmio, VORTEX_IRQ_CTRL, |
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hwread(vortex->mmio, VORTEX_IRQ_CTRL) | IRQ_MIDI); |
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/* Create MPU401 instance. */ |
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#ifdef VORTEX_MPU401_LEGACY |
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temp = snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_MPU401, 0x330, |
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MPU401_INFO_IRQ_HOOK, -1, &rmidi); |
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if (temp) { |
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hwwrite(vortex->mmio, VORTEX_CTRL, |
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(hwread(vortex->mmio, VORTEX_CTRL) & |
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~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN); |
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return temp; |
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} |
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#else |
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port = (unsigned long)(vortex->mmio + VORTEX_MIDI_DATA); |
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temp = snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port, |
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MPU401_INFO_INTEGRATED | MPU401_INFO_MMIO | |
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MPU401_INFO_IRQ_HOOK, -1, &rmidi); |
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if (temp) { |
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hwwrite(vortex->mmio, VORTEX_CTRL, |
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(hwread(vortex->mmio, VORTEX_CTRL) & |
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~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN); |
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return temp; |
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} |
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mpu = rmidi->private_data; |
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mpu->cport = (unsigned long)(vortex->mmio + VORTEX_MIDI_CMD); |
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#endif |
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/* Overwrite MIDI name */ |
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snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI %d", CARD_NAME_SHORT , vortex->card->number); |
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vortex->rmidi = rmidi; |
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return 0; |
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}
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