hpios.h
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/******************************************************************************
AudioScience HPI driver
Copyright (C) 1997-2011 AudioScience Inc. <support@audioscience.com>
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License as
published by the Free Software Foundation;
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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
#ifdef CONFIG_64BIT
#define HPI64BIT
#endif
/** 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 ununsed 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;
/* mutex prevents contention for one card
between multiple user programs (via ioctl) */
struct mutex mutex;
char *p_buffer;
size_t buffer_size;
};
#endif