166 lines
4.6 KiB
C
166 lines
4.6 KiB
C
/******************************************************************************
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AudioScience HPI driver
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Copyright (C) 1997-2011 AudioScience Inc. <support@audioscience.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation;
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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HPI Operating System Specific macros for Linux Kernel driver
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(C) Copyright AudioScience Inc. 1997-2003
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******************************************************************************/
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#ifndef _HPIOS_H_
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#define _HPIOS_H_
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#undef HPI_OS_LINUX_KERNEL
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#define HPI_OS_LINUX_KERNEL
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#define HPI_OS_DEFINED
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#define HPI_BUILD_KERNEL_MODE
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#include <linux/io.h>
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#include <linux/ioctl.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/device.h>
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#include <linux/firmware.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/mutex.h>
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#define HPI_NO_OS_FILE_OPS
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/** Details of a memory area allocated with pci_alloc_consistent
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Need all info for parameters to pci_free_consistent
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*/
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struct consistent_dma_area {
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struct device *pdev;
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/* looks like dma-mapping dma_devres ?! */
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size_t size;
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void *vaddr;
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dma_addr_t dma_handle;
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};
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static inline u16 hpios_locked_mem_get_phys_addr(struct consistent_dma_area
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*locked_mem_handle, u32 *p_physical_addr)
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{
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*p_physical_addr = locked_mem_handle->dma_handle;
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return 0;
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}
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static inline u16 hpios_locked_mem_get_virt_addr(struct consistent_dma_area
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*locked_mem_handle, void **pp_virtual_addr)
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{
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*pp_virtual_addr = locked_mem_handle->vaddr;
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return 0;
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}
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static inline u16 hpios_locked_mem_valid(struct consistent_dma_area
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*locked_mem_handle)
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{
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return locked_mem_handle->size != 0;
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}
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struct hpi_ioctl_linux {
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void __user *phm;
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void __user *phr;
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};
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/* Conflict?: H is already used by a number of drivers hid, bluetooth hci,
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and some sound drivers sb16, hdsp, emu10k. AFAIK 0xFC is ununsed command
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*/
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#define HPI_IOCTL_LINUX _IOWR('H', 0xFC, struct hpi_ioctl_linux)
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#define HPI_DEBUG_FLAG_ERROR KERN_ERR
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#define HPI_DEBUG_FLAG_WARNING KERN_WARNING
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#define HPI_DEBUG_FLAG_NOTICE KERN_NOTICE
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#define HPI_DEBUG_FLAG_INFO KERN_INFO
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#define HPI_DEBUG_FLAG_DEBUG KERN_DEBUG
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#define HPI_DEBUG_FLAG_VERBOSE KERN_DEBUG /* kernel has no verbose */
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#include <linux/spinlock.h>
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#define HPI_LOCKING
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struct hpios_spinlock {
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spinlock_t lock; /* SEE hpios_spinlock */
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int lock_context;
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};
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/* The reason for all this evilness is that ALSA calls some of a drivers
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* operators in atomic context, and some not. But all our functions channel
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* through the HPI_Message conduit, so we can't handle the different context
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* per function
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*/
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#define IN_LOCK_BH 1
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#define IN_LOCK_IRQ 0
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static inline void cond_lock(struct hpios_spinlock *l)
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{
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if (irqs_disabled()) {
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/* NO bh or isr can execute on this processor,
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so ordinary lock will do
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*/
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spin_lock(&((l)->lock));
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l->lock_context = IN_LOCK_IRQ;
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} else {
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spin_lock_bh(&((l)->lock));
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l->lock_context = IN_LOCK_BH;
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}
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}
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static inline void cond_unlock(struct hpios_spinlock *l)
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{
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if (l->lock_context == IN_LOCK_BH)
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spin_unlock_bh(&((l)->lock));
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else
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spin_unlock(&((l)->lock));
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}
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#define hpios_msgxlock_init(obj) spin_lock_init(&(obj)->lock)
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#define hpios_msgxlock_lock(obj) cond_lock(obj)
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#define hpios_msgxlock_unlock(obj) cond_unlock(obj)
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#define hpios_dsplock_init(obj) spin_lock_init(&(obj)->dsp_lock.lock)
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#define hpios_dsplock_lock(obj) cond_lock(&(obj)->dsp_lock)
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#define hpios_dsplock_unlock(obj) cond_unlock(&(obj)->dsp_lock)
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#ifdef CONFIG_SND_DEBUG
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#define HPI_BUILD_DEBUG
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#endif
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#define HPI_ALIST_LOCKING
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#define hpios_alistlock_init(obj) spin_lock_init(&((obj)->list_lock.lock))
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#define hpios_alistlock_lock(obj) spin_lock(&((obj)->list_lock.lock))
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#define hpios_alistlock_unlock(obj) spin_unlock(&((obj)->list_lock.lock))
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struct snd_card;
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/** pci drvdata points to an instance of this struct */
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struct hpi_adapter {
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struct hpi_adapter_obj *adapter;
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struct snd_card *snd_card;
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int irq;
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int interrupt_mode;
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void (*interrupt_callback) (struct hpi_adapter *);
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/* mutex prevents contention for one card
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between multiple user programs (via ioctl) */
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struct mutex mutex;
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char *p_buffer;
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size_t buffer_size;
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};
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#endif
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