init.c

我为S3C2410写的扩展并口驱动程序

/* Parallel-port initialisation code.
 * 
 * Authors: David Campbell <[e-mail]>
 *          Tim Waugh <[e-mail]>
 *	    Jose Renau <[e-mail]>
 *
 * based on work by Grant Guenther <[e-mail]>
 *              and Philip Blundell <[e-mail]>
 
 * modified by wingwind for 16c552
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/threads.h>
#include <linux/string.h>
#include <linux/parport.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>

#ifndef MODULE
static int io[PARPORT_MAX+1] __initdata = { [0 ... PARPORT_MAX] = 0 };
#ifdef CONFIG_PARPORT_PC
static int io_hi[PARPORT_MAX+1] __initdata =
	{ [0 ... PARPORT_MAX] = PARPORT_IOHI_AUTO };
#endif
static int irq[PARPORT_MAX] __initdata = { [0 ... PARPORT_MAX-1] = PARPORT_IRQ_PROBEONLY };
static int dma[PARPORT_MAX] __initdata = { [0 ... PARPORT_MAX-1] = PARPORT_DMA_NONE };

extern int parport_pc_init(int *io, int *io_hi, int *irq, int *dma);
extern int parport_sunbpp_init(void);
extern int parport_amiga_init(void);
extern int parport_mfc3_init(void);
extern int parport_16c552_init(void);// wingwind add for s3c2410 board's 16c552 parport

static int parport_setup_ptr __initdata = 0;

/*
 * Acceptable parameters:
 *
 * parport=0
 * parport=auto
 * parport=0xBASE[,IRQ[,DMA]]
 *
 * IRQ/DMA may be numeric or 'auto' or 'none'
 */
static int __init parport_setup (char *str)
{
	char *endptr;
	char *sep;
	int val;

	if (!str || !*str || (*str == '0' && !*(str+1))) {
		/* Disable parport if "parport=0" in cmdline */
		io[0] = PARPORT_DISABLE;
		return 1;
	}

	if (!strncmp (str, "auto", 4)) {
		irq[0] = PARPORT_IRQ_AUTO;
		dma[0] = PARPORT_DMA_AUTO;
		return 1;
	}

	val = simple_strtoul (str, &endptr, 0);
	if (endptr == str) {
		printk (KERN_WARNING "parport=%s not understood\n", str);
		return 1;
	}

	if (parport_setup_ptr == PARPORT_MAX) {
		printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
		return 1;
	}
	
	io[parport_setup_ptr] = val;
	irq[parport_setup_ptr] = PARPORT_IRQ_NONE;
	dma[parport_setup_ptr] = PARPORT_DMA_NONE;

	sep = strchr (str, ',');
	if (sep++) {
		if (!strncmp (sep, "auto", 4))
			irq[parport_setup_ptr] = PARPORT_IRQ_AUTO;
		else if (strncmp (sep, "none", 4)) {
			val = simple_strtoul (sep, &endptr, 0);
			if (endptr == sep) {
				printk (KERN_WARNING
					"parport=%s: irq not understood\n",
					str);
				return 1;
			}
			irq[parport_setup_ptr] = val;
		}
	}

	sep = strchr (sep, ',');
	if (sep++) {
		if (!strncmp (sep, "auto", 4))
			dma[parport_setup_ptr] = PARPORT_DMA_AUTO;
		else if (!strncmp (sep, "nofifo", 6))
			dma[parport_setup_ptr] = PARPORT_DMA_NOFIFO;
		else if (strncmp (sep, "none", 4)) {
			val = simple_strtoul (sep, &endptr, 0);
			if (endptr == sep) {
				printk (KERN_WARNING
					"parport=%s: dma not understood\n",
					str);
				return 1;
			}
			dma[parport_setup_ptr] = val;
		}
	}

	parport_setup_ptr++;
	return 1;
}

__setup ("parport=", parport_setup);

#endif

#ifdef MODULE
int init_module(void)
{
#ifdef CONFIG_SYSCTL
	parport_default_proc_register ();
#endif
	return 0;
}

void cleanup_module(void)
{
#ifdef CONFIG_SYSCTL
	parport_default_proc_unregister ();
#endif
}

#else

int __init parport_init (void)
{
	if (io[0] == PARPORT_DISABLE) 
		return 1;

#ifdef CONFIG_SYSCTL
	parport_default_proc_register ();
#endif

#ifdef CONFIG_PARPORT_PC
	parport_pc_init(io, io_hi, irq, dma);
#endif
#ifdef CONFIG_PARPORT_AMIGA
	parport_amiga_init();
#endif
#ifdef CONFIG_PARPORT_MFC3
	parport_mfc3_init();
#endif
#ifdef CONFIG_PARPORT_ATARI
	parport_atari_init();
#endif
#ifdef CONFIG_PARPORT_ARC
	parport_arc_init();
#endif
#ifdef CONFIG_PARPORT_SUNBPP
	parport_sunbpp_init();
#endif

#ifdef CONFIG_PARPORT_16C552
	parport_16c552_init();
#endif
	return 0;
}

__initcall(parport_init);

#endif

/* Exported symbols for modules. */

EXPORT_SYMBOL(parport_claim);
EXPORT_SYMBOL(parport_claim_or_block);
EXPORT_SYMBOL(parport_release);
EXPORT_SYMBOL(parport_register_port);
EXPORT_SYMBOL(parport_announce_port);
EXPORT_SYMBOL(parport_unregister_port);
EXPORT_SYMBOL(parport_register_driver);
EXPORT_SYMBOL(parport_unregister_driver);
EXPORT_SYMBOL(parport_register_device);
EXPORT_SYMBOL(parport_unregister_device);
EXPORT_SYMBOL(parport_enumerate);
EXPORT_SYMBOL(parport_get_port);
EXPORT_SYMBOL(parport_put_port);
EXPORT_SYMBOL(parport_find_number);
EXPORT_SYMBOL(parport_find_base);
EXPORT_SYMBOL(parport_negotiate);
EXPORT_SYMBOL(parport_write);
EXPORT_SYMBOL(parport_read);
EXPORT_SYMBOL(parport_ieee1284_wakeup);
EXPORT_SYMBOL(parport_wait_peripheral);
EXPORT_SYMBOL(parport_poll_peripheral);
EXPORT_SYMBOL(parport_wait_event);
EXPORT_SYMBOL(parport_set_timeout);
EXPORT_SYMBOL(parport_ieee1284_interrupt);
EXPORT_SYMBOL(parport_ieee1284_ecp_write_data);
EXPORT_SYMBOL(parport_ieee1284_ecp_read_data);
EXPORT_SYMBOL(parport_ieee1284_ecp_write_addr);
EXPORT_SYMBOL(parport_ieee1284_write_compat);
EXPORT_SYMBOL(parport_ieee1284_read_nibble);
EXPORT_SYMBOL(parport_ieee1284_read_byte);
EXPORT_SYMBOL(parport_ieee1284_epp_write_data);
EXPORT_SYMBOL(parport_ieee1284_epp_read_data);
EXPORT_SYMBOL(parport_ieee1284_epp_write_addr);
EXPORT_SYMBOL(parport_ieee1284_epp_read_addr);
EXPORT_SYMBOL(parport_proc_register);
EXPORT_SYMBOL(parport_proc_unregister);
EXPORT_SYMBOL(parport_device_proc_register);
EXPORT_SYMBOL(parport_device_proc_unregister);
EXPORT_SYMBOL(parport_default_proc_register);
EXPORT_SYMBOL(parport_default_proc_unregister);
EXPORT_SYMBOL(parport_parse_irqs);
EXPORT_SYMBOL(parport_parse_dmas);
#ifdef CONFIG_PARPORT_1284
EXPORT_SYMBOL(parport_open);
EXPORT_SYMBOL(parport_close);
EXPORT_SYMBOL(parport_device_id);
EXPORT_SYMBOL(parport_device_num);
EXPORT_SYMBOL(parport_device_coords);
EXPORT_SYMBOL(parport_daisy_deselect_all);
EXPORT_SYMBOL(parport_daisy_select);
EXPORT_SYMBOL(parport_daisy_init);
EXPORT_SYMBOL(parport_find_device);
EXPORT_SYMBOL(parport_find_class);
#endif

void inc_parport_count(void)
{
#ifdef MODULE
	MOD_INC_USE_COUNT;
#endif
}

void dec_parport_count(void)
{
#ifdef MODULE
	MOD_DEC_USE_COUNT;
#endif
}