diff options
Diffstat (limited to 'sound/pci/asihpi/hpios.h')
| -rw-r--r-- | sound/pci/asihpi/hpios.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/sound/pci/asihpi/hpios.h b/sound/pci/asihpi/hpios.h new file mode 100644 index 000000000..9e551bc46 --- /dev/null +++ b/sound/pci/asihpi/hpios.h @@ -0,0 +1,154 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/****************************************************************************** + + AudioScience HPI driver + Copyright (C) 1997-2011 AudioScience Inc. <support@audioscience.com> + + +HPI Operating System Specific macros for Linux Kernel driver + +(C) Copyright AudioScience Inc. 1997-2003 +******************************************************************************/ +#ifndef _HPIOS_H_ +#define _HPIOS_H_ + +#undef HPI_OS_LINUX_KERNEL +#define HPI_OS_LINUX_KERNEL + +#define HPI_OS_DEFINED +#define HPI_BUILD_KERNEL_MODE + +#include <linux/io.h> +#include <linux/ioctl.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/device.h> +#include <linux/firmware.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/mutex.h> + +#define HPI_NO_OS_FILE_OPS + +/** Details of a memory area allocated with pci_alloc_consistent +Need all info for parameters to pci_free_consistent +*/ +struct consistent_dma_area { + struct device *pdev; + /* looks like dma-mapping dma_devres ?! */ + size_t size; + void *vaddr; + dma_addr_t dma_handle; +}; + +static inline u16 hpios_locked_mem_get_phys_addr(struct consistent_dma_area + *locked_mem_handle, u32 *p_physical_addr) +{ + *p_physical_addr = locked_mem_handle->dma_handle; + return 0; +} + +static inline u16 hpios_locked_mem_get_virt_addr(struct consistent_dma_area + *locked_mem_handle, void **pp_virtual_addr) +{ + *pp_virtual_addr = locked_mem_handle->vaddr; + return 0; +} + +static inline u16 hpios_locked_mem_valid(struct consistent_dma_area + *locked_mem_handle) +{ + return locked_mem_handle->size != 0; +} + +struct hpi_ioctl_linux { + void __user *phm; + void __user *phr; +}; + +/* Conflict?: H is already used by a number of drivers hid, bluetooth hci, + and some sound drivers sb16, hdsp, emu10k. AFAIK 0xFC is unused command +*/ +#define HPI_IOCTL_LINUX _IOWR('H', 0xFC, struct hpi_ioctl_linux) + +#define HPI_DEBUG_FLAG_ERROR KERN_ERR +#define HPI_DEBUG_FLAG_WARNING KERN_WARNING +#define HPI_DEBUG_FLAG_NOTICE KERN_NOTICE +#define HPI_DEBUG_FLAG_INFO KERN_INFO +#define HPI_DEBUG_FLAG_DEBUG KERN_DEBUG +#define HPI_DEBUG_FLAG_VERBOSE KERN_DEBUG /* kernel has no verbose */ + +#include <linux/spinlock.h> + +#define HPI_LOCKING + +struct hpios_spinlock { + spinlock_t lock; /* SEE hpios_spinlock */ + int lock_context; +}; + +/* The reason for all this evilness is that ALSA calls some of a drivers + * operators in atomic context, and some not. But all our functions channel + * through the HPI_Message conduit, so we can't handle the different context + * per function + */ +#define IN_LOCK_BH 1 +#define IN_LOCK_IRQ 0 +static inline void cond_lock(struct hpios_spinlock *l) +{ + if (irqs_disabled()) { + /* NO bh or isr can execute on this processor, + so ordinary lock will do + */ + spin_lock(&((l)->lock)); + l->lock_context = IN_LOCK_IRQ; + } else { + spin_lock_bh(&((l)->lock)); + l->lock_context = IN_LOCK_BH; + } +} + +static inline void cond_unlock(struct hpios_spinlock *l) +{ + if (l->lock_context == IN_LOCK_BH) + spin_unlock_bh(&((l)->lock)); + else + spin_unlock(&((l)->lock)); +} + +#define hpios_msgxlock_init(obj) spin_lock_init(&(obj)->lock) +#define hpios_msgxlock_lock(obj) cond_lock(obj) +#define hpios_msgxlock_unlock(obj) cond_unlock(obj) + +#define hpios_dsplock_init(obj) spin_lock_init(&(obj)->dsp_lock.lock) +#define hpios_dsplock_lock(obj) cond_lock(&(obj)->dsp_lock) +#define hpios_dsplock_unlock(obj) cond_unlock(&(obj)->dsp_lock) + +#ifdef CONFIG_SND_DEBUG +#define HPI_BUILD_DEBUG +#endif + +#define HPI_ALIST_LOCKING +#define hpios_alistlock_init(obj) spin_lock_init(&((obj)->list_lock.lock)) +#define hpios_alistlock_lock(obj) spin_lock(&((obj)->list_lock.lock)) +#define hpios_alistlock_unlock(obj) spin_unlock(&((obj)->list_lock.lock)) + +struct snd_card; + +/** pci drvdata points to an instance of this struct */ +struct hpi_adapter { + struct hpi_adapter_obj *adapter; + struct snd_card *snd_card; + + int irq; + int interrupt_mode; + void (*interrupt_callback) (struct hpi_adapter *); + + /* mutex prevents contention for one card + between multiple user programs (via ioctl) */ + struct mutex mutex; + char *p_buffer; + size_t buffer_size; +}; + +#endif |