1 files changed, 98 insertions, 0 deletions
diff --git a/sound/pci/au88x0/au88x0_mpu401.c b/sound/pci/au88x0/au88x0_mpu401.c
new file mode 100644
index 000000000..164f6b703
--- /dev/null
+++ b/sound/pci/au88x0/au88x0_mpu401.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *  Routines for control of MPU-401 in UART mode
+ *
+ *   Modified for the Aureal Vortex based Soundcards
+ *   by Manuel Jander (mjande@embedded.cl).
+ */
+
+#include <linux/time.h>
+#include <linux/init.h>
+#include <sound/core.h>
+#include <sound/mpu401.h>
+#include "au88x0.h"
+
+/* Check for mpu401 mmio support. */
+/* MPU401 legacy support is only provided as a emergency fallback *
+ * for older versions of ALSA. Its usage is strongly discouraged. */
+#ifndef MPU401_HW_AUREAL
+#define VORTEX_MPU401_LEGACY
+#endif
+
+/* Vortex MPU401 defines. */
+#define MIDI_CLOCK_DIV      0x61
+/* Standart MPU401 defines. */
+#define MPU401_RESET		0xff
+#define MPU401_ENTER_UART	0x3f
+#define MPU401_ACK		    0xfe
+
+static int snd_vortex_midi(vortex_t *vortex)
+{
+	struct snd_rawmidi *rmidi;
+	int temp, mode;
+	struct snd_mpu401 *mpu;
+	unsigned long port;
+
+#ifdef VORTEX_MPU401_LEGACY
+	/* EnableHardCodedMPU401Port() */
+	/* Enable Legacy MIDI Interface port. */
+	port = (0x03 << 5);	/* FIXME: static address. 0x330 */
+	temp =
+	    (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) |
+	    CTRL_MIDI_EN | port;
+	hwwrite(vortex->mmio, VORTEX_CTRL, temp);
+#else
+	/* Disable Legacy MIDI Interface port. */
+	temp =
+	    (hwread(vortex->mmio, VORTEX_CTRL) & ~CTRL_MIDI_PORT) &
+	    ~CTRL_MIDI_EN;
+	hwwrite(vortex->mmio, VORTEX_CTRL, temp);
+#endif
+	/* Mpu401UartInit() */
+	mode = 1;
+	temp = hwread(vortex->mmio, VORTEX_CTRL2) & 0xffff00cf;
+	temp |= (MIDI_CLOCK_DIV << 8) | ((mode >> 24) & 0xff) << 4;
+	hwwrite(vortex->mmio, VORTEX_CTRL2, temp);
+	hwwrite(vortex->mmio, VORTEX_MIDI_CMD, MPU401_RESET);
+
+	/* Check if anything is OK. */
+	temp = hwread(vortex->mmio, VORTEX_MIDI_DATA);
+	if (temp != MPU401_ACK /*0xfe */ ) {
+		dev_err(vortex->card->dev, "midi port doesn't acknowledge!\n");
+		return -ENODEV;
+	}
+	/* Enable MPU401 interrupts. */
+	hwwrite(vortex->mmio, VORTEX_IRQ_CTRL,
+		hwread(vortex->mmio, VORTEX_IRQ_CTRL) | IRQ_MIDI);
+
+	/* Create MPU401 instance. */
+#ifdef VORTEX_MPU401_LEGACY
+	temp = snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_MPU401, 0x330,
+				   MPU401_INFO_IRQ_HOOK, -1, &rmidi);
+	if (temp) {
+		hwwrite(vortex->mmio, VORTEX_CTRL,
+			(hwread(vortex->mmio, VORTEX_CTRL) &
+			 ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
+		return temp;
+	}
+#else
+	port = (unsigned long)(vortex->mmio + VORTEX_MIDI_DATA);
+	temp = snd_mpu401_uart_new(vortex->card, 0, MPU401_HW_AUREAL, port,
+				   MPU401_INFO_INTEGRATED | MPU401_INFO_MMIO |
+				   MPU401_INFO_IRQ_HOOK, -1, &rmidi);
+	if (temp) {
+		hwwrite(vortex->mmio, VORTEX_CTRL,
+			(hwread(vortex->mmio, VORTEX_CTRL) &
+			 ~CTRL_MIDI_PORT) & ~CTRL_MIDI_EN);
+		return temp;
+	}
+	mpu = rmidi->private_data;
+	mpu->cport = (unsigned long)(vortex->mmio + VORTEX_MIDI_CMD);
+#endif
+	/* Overwrite MIDI name */
+	snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI %d", CARD_NAME_SHORT , vortex->card->number);
+
+	vortex->rmidi = rmidi;
+	return 0;
+}