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Diffstat (limited to 'include/sound/mpu401.h')
| -rw-r--r-- | include/sound/mpu401.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/include/sound/mpu401.h b/include/sound/mpu401.h new file mode 100644 index 000000000..d4c915a37 --- /dev/null +++ b/include/sound/mpu401.h @@ -0,0 +1,123 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __SOUND_MPU401_H +#define __SOUND_MPU401_H + +/* + * Header file for MPU-401 and compatible cards + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + */ + +#include <sound/rawmidi.h> +#include <linux/interrupt.h> + +#define MPU401_HW_MPU401 1 /* native MPU401 */ +#define MPU401_HW_SB 2 /* SoundBlaster MPU-401 UART */ +#define MPU401_HW_ES1688 3 /* AudioDrive ES1688 MPU-401 UART */ +#define MPU401_HW_OPL3SA2 4 /* Yamaha OPL3-SA2 */ +#define MPU401_HW_SONICVIBES 5 /* S3 SonicVibes */ +#define MPU401_HW_CS4232 6 /* CS4232 */ +#define MPU401_HW_ES18XX 7 /* AudioDrive ES18XX MPU-401 UART */ +#define MPU401_HW_FM801 8 /* ForteMedia FM801 */ +#define MPU401_HW_TRID4DWAVE 9 /* Trident 4DWave */ +#define MPU401_HW_AZT2320 10 /* Aztech AZT2320 */ +#define MPU401_HW_ALS100 11 /* Avance Logic ALS100 */ +#define MPU401_HW_ICE1712 12 /* Envy24 */ +#define MPU401_HW_VIA686A 13 /* VIA 82C686A */ +#define MPU401_HW_YMFPCI 14 /* YMF DS-XG PCI */ +#define MPU401_HW_CMIPCI 15 /* CMIPCI MPU-401 UART */ +#define MPU401_HW_ALS4000 16 /* Avance Logic ALS4000 */ +#define MPU401_HW_INTEL8X0 17 /* Intel8x0 driver */ +#define MPU401_HW_PC98II 18 /* Roland PC98II */ +#define MPU401_HW_AUREAL 19 /* Aureal Vortex */ + +#define MPU401_INFO_INPUT (1 << 0) /* input stream */ +#define MPU401_INFO_OUTPUT (1 << 1) /* output stream */ +#define MPU401_INFO_INTEGRATED (1 << 2) /* integrated h/w port */ +#define MPU401_INFO_MMIO (1 << 3) /* MMIO access */ +#define MPU401_INFO_TX_IRQ (1 << 4) /* independent TX irq */ +#define MPU401_INFO_IRQ_HOOK (1 << 5) /* mpu401 irq handler is called + from driver irq handler */ +#define MPU401_INFO_NO_ACK (1 << 6) /* No ACK cmd needed */ +#define MPU401_INFO_USE_TIMER (1 << 15) /* internal */ + +#define MPU401_MODE_BIT_INPUT 0 +#define MPU401_MODE_BIT_OUTPUT 1 +#define MPU401_MODE_BIT_INPUT_TRIGGER 2 +#define MPU401_MODE_BIT_OUTPUT_TRIGGER 3 + +#define MPU401_MODE_INPUT (1<<MPU401_MODE_BIT_INPUT) +#define MPU401_MODE_OUTPUT (1<<MPU401_MODE_BIT_OUTPUT) +#define MPU401_MODE_INPUT_TRIGGER (1<<MPU401_MODE_BIT_INPUT_TRIGGER) +#define MPU401_MODE_OUTPUT_TRIGGER (1<<MPU401_MODE_BIT_OUTPUT_TRIGGER) + +#define MPU401_MODE_INPUT_TIMER (1<<0) +#define MPU401_MODE_OUTPUT_TIMER (1<<1) + +struct snd_mpu401 { + struct snd_rawmidi *rmidi; + + unsigned short hardware; /* MPU401_HW_XXXX */ + unsigned int info_flags; /* MPU401_INFO_XXX */ + unsigned long port; /* base port of MPU-401 chip */ + unsigned long cport; /* port + 1 (usually) */ + struct resource *res; /* port resource */ + int irq; /* IRQ number of MPU-401 chip */ + + unsigned long mode; /* MPU401_MODE_XXXX */ + int timer_invoked; + + int (*open_input) (struct snd_mpu401 * mpu); + void (*close_input) (struct snd_mpu401 * mpu); + int (*open_output) (struct snd_mpu401 * mpu); + void (*close_output) (struct snd_mpu401 * mpu); + void *private_data; + + struct snd_rawmidi_substream *substream_input; + struct snd_rawmidi_substream *substream_output; + + spinlock_t input_lock; + spinlock_t output_lock; + spinlock_t timer_lock; + + struct timer_list timer; + + void (*write) (struct snd_mpu401 * mpu, unsigned char data, unsigned long addr); + unsigned char (*read) (struct snd_mpu401 *mpu, unsigned long addr); +}; + +/* I/O ports */ + +#define MPU401C(mpu) (mpu)->cport +#define MPU401D(mpu) (mpu)->port + +/* + * control register bits + */ +/* read MPU401C() */ +#define MPU401_RX_EMPTY 0x80 +#define MPU401_TX_FULL 0x40 + +/* write MPU401C() */ +#define MPU401_RESET 0xff +#define MPU401_ENTER_UART 0x3f + +/* read MPU401D() */ +#define MPU401_ACK 0xfe + + +/* + + */ + +irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id); +irqreturn_t snd_mpu401_uart_interrupt_tx(int irq, void *dev_id); + +int snd_mpu401_uart_new(struct snd_card *card, + int device, + unsigned short hardware, + unsigned long port, + unsigned int info_flags, + int irq, + struct snd_rawmidi ** rrawmidi); + +#endif /* __SOUND_MPU401_H */ |