mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 12:28:41 +08:00
c2b0718f78
PCI AU88x0 driver code contains a lot of assignments in if condition, which is a bad coding style that may confuse readers and occasionally lead to bugs. This patch is merely for coding-style fixes. A potential real fix is about the PCI AGP bridge management refcount in addition while spotted out during conversions. Link: https://lore.kernel.org/r/20210608140540.17885-36-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
// 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;
|
|
}
|