linux/drivers/media/common/saa7146/saa7146_core.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
    saa7146.o - driver for generic saa7146-based hardware

    Copyright (C) 1998-2003 Michael Hunold <[email protected]>

*/

#define pr_fmt(fmt) …

#include <media/drv-intf/saa7146.h>
#include <linux/module.h>

static int saa7146_num;

unsigned int saa7146_debug;

module_param(saa7146_debug, uint, 0644);
MODULE_PARM_DESC(…) …;

#if 0
static void dump_registers(struct saa7146_dev* dev)
{
	int i = 0;

	pr_info(" @ %li jiffies:\n", jiffies);
	for (i = 0; i <= 0x148; i += 4)
		pr_info("0x%03x: 0x%08x\n", i, saa7146_read(dev, i));
}
#endif

/****************************************************************************
 * gpio and debi helper functions
 ****************************************************************************/

void saa7146_setgpio(struct saa7146_dev *dev, int port, u32 data)
{ … }

/* This DEBI code is based on the saa7146 Stradis driver by Nathan Laredo */
static inline int saa7146_wait_for_debi_done_sleep(struct saa7146_dev *dev,
				unsigned long us1, unsigned long us2)
{ … }

static inline int saa7146_wait_for_debi_done_busyloop(struct saa7146_dev *dev,
				unsigned long us1, unsigned long us2)
{ … }

int saa7146_wait_for_debi_done(struct saa7146_dev *dev, int nobusyloop)
{ … }

/****************************************************************************
 * general helper functions
 ****************************************************************************/

/* this is videobuf_vmalloc_to_sg() from videobuf-dma-sg.c
   make sure virt has been allocated with vmalloc_32(), otherwise return NULL
   on highmem machines */
static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages)
{ … }

/********************************************************************************/
/* common page table functions */

void *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa7146_pgtable *pt)
{ … }

void saa7146_vfree_destroy_pgtable(struct pci_dev *pci, void *mem, struct saa7146_pgtable *pt)
{ … }

void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt)
{ … }

int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt)
{ … }

int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt,
				 struct scatterlist *list, int sglen)
{ … }

/********************************************************************************/
/* interrupt handler */
static irqreturn_t interrupt_hw(int irq, void *dev_id)
{ … }

/*********************************************************************************/
/* configuration-functions                                                       */

static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent)
{ … }

static void saa7146_remove_one(struct pci_dev *pdev)
{ … }

/*********************************************************************************/
/* extension handling functions                                                  */

int saa7146_register_extension(struct saa7146_extension* ext)
{ … }

int saa7146_unregister_extension(struct saa7146_extension* ext)
{ … }

EXPORT_SYMBOL_GPL(…);
EXPORT_SYMBOL_GPL(…);

/* misc functions used by extension modules */
EXPORT_SYMBOL_GPL(…);
EXPORT_SYMBOL_GPL(…);
EXPORT_SYMBOL_GPL(…);
EXPORT_SYMBOL_GPL(…);
EXPORT_SYMBOL_GPL(…);
EXPORT_SYMBOL_GPL(…);

EXPORT_SYMBOL_GPL(…);

EXPORT_SYMBOL_GPL(…);

EXPORT_SYMBOL_GPL(…);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;