modparms.c

PCM9880是一块PC/104界面的双端口隔离CAN总线通讯卡

/* mod_parms.c
 * Linux CAN-bus device driver.
 * Written by Arnaud Westenberg email:[e-mail]
 * This software is released under the GPL-License.
 * Version 0.7  6 Aug 2001
 */


#include <linux/autoconf.h>
#if defined (CONFIG_MODVERSIONS) && !defined (MODVERSIONS)
#define MODVERSIONS
#endif

#if defined (MODVERSIONS)
#include <linux/modversions.h>
#endif

#include "../.support"
#ifndef PIP
#define PIP 0
#endif
#ifndef SMARTCAN
#define SMARTCAN 0
#endif
#ifndef PCCAN
#define PCCAN 0
#endif
#ifndef NSI
#define NSI 0
#endif
#ifndef CC104
#define CC104 0
#endif
#ifndef AIM104
#define AIM104 0
#endif
#ifndef PCI03
#define PCI03 0
#endif
#ifndef PCM3680
#define PCM3680 0
#endif
#ifndef M437
#define M437 0
#endif
#ifndef PCCCAN
#define PCCCAN 0
#endif
#ifndef SSV
#define SSV 0
#endif
#ifndef TEMPLATE
#define TEMPLATE 0
#endif

#include <linux/string.h>
#include <linux/fs.h>

#include "../include/main.h"
#include "../include/modparms.h"

int parse_mod_parms(void)
{
	int i=0,j=0,irq_needed=0,irq_supplied=0,io_needed=0,io_supplied=0,minor_needed=0,minor_supplied=0;

	if ( (hw[0] == NULL) | (irq[0] == -1) | (io[0] == -1) ) {
		CANMSG("You must supply your type of hardware, interrupt numbers and io address.\n");
		CANMSG("Example: # insmod can.o hw=pip5 irq=4 io=0x8000\n");
		return -ENODEV;
	}

	while ( (hw[i] != NULL) && (i < MAX_HW_CARDS) ) {
		if ( !strcmp(hw[i],"pip5") && PIP )
			irq_needed++;
		else if (!strcmp(hw[i],"pip6") && PIP)
			irq_needed++;
		else if (!strcmp(hw[i],"smartcan") && SMARTCAN)
			irq_needed++;
		else if (!strcmp(hw[i],"pccan-q") && PCCAN)
			irq_needed=irq_needed+4;
		else if (!strcmp(hw[i],"pccan-f") && PCCAN)
			irq_needed++;
		else if (!strcmp(hw[i],"pccan-s") && PCCAN)
			irq_needed++;
		else if (!strcmp(hw[i],"pccan-d") && PCCAN)
			irq_needed=irq_needed+2;
		else if (!strcmp(hw[i],"nsican") && NSI)
			irq_needed++;
		else if (!strcmp(hw[i],"cc104") && CC104)
			irq_needed++;
		else if (!strcmp(hw[i],"aim104") && AIM104)
			irq_needed++;
		else if (!strcmp(hw[i],"pc-i03") && PCI03)
			irq_needed++;
		else if (!strcmp(hw[i],"pcm3680") && PCM3680)
			irq_needed=irq_needed+2;
		else if (!strcmp(hw[i],"m437") && M437)
			irq_needed++;
		else if (!strcmp(hw[i],"pcccan") && PCCCAN)
			irq_needed++;
		else if (!strcmp(hw[i],"ssv") && SSV)
			irq_needed=irq_needed+2;
		else if (!strcmp(hw[i],"template") && TEMPLATE);
		else {
			CANMSG("Sorry, hardware \"%s\" is currently not supported.\n",hw[i]);
			return -EINVAL;
		}
		i++;
	}

	/* Check wether the supplied number of io addresses is correct. */
	io_needed=i;
	while ( (io[io_supplied] != -1) & (io_supplied<MAX_HW_CARDS) ) 
		io_supplied++;
	if (io_needed != io_supplied) {
		CANMSG("Invalid number of io addresses.\n");
		CANMSG("Supplied hardware needs %d io address(es).\n",io_needed);
		return -EINVAL;
	}

	/* Check wether the supplied number of irq's is correct. */
	while ( (irq[irq_supplied] != -1) & (irq_supplied<MAX_IRQ) )
		irq_supplied++;
	while ( (hw[j] != NULL) && (j<MAX_HW_CARDS) ) {
		if (!strcmp(hw[j],"template") && TEMPLATE)
			irq_needed = irq_supplied;
		j++;
	}
	if (irq_needed != irq_supplied) {
		CANMSG("Invalid number of interrupts.\n");
		CANMSG("Supplied harware needs %d irq number(s).\n",irq_needed);
		return -EINVAL;
	}

	/* In case minor numbers were assigned check wether the correct number
	 * of minor numbers was supplied.
	 */
	if (minor[0] != -1) {
		minor_needed=irq_needed;
		while ((minor[minor_supplied] != -1) & (minor_supplied<MAX_IRQ))
			minor_supplied++; 
		if (minor_supplied != minor_needed) {
			CANMSG("Invalid number of minor numbers.\n");
			CANMSG("Supplied hardware needs %d minor number(s).\n",minor_needed);
			return -EINVAL;
		}
	}

	return 0;
}
/* list_hw is used when debugging is on to show the hardware layout */
int list_hw(void)
{
	int i=0,j=0,k=0;

	DEBUGMSG("Number of boards : %d\n",hardware_p->nr_boards);

	while ( (hw[i] != NULL) & (i<=MAX_HW_CARDS-1) ) {
		printk(KERN_ERR "\n");
		DEBUGMSG("Hardware         : %s\n",hardware_p->candevice[i]->hwname);
		DEBUGMSG("IO address       : 0x%lx\n",hardware_p->candevice[i]->io_addr);
		DEBUGMSG("Nr. of i82527    : %d\n",hardware_p->candevice[i]->nr_82527_chips);
		DEBUGMSG("Nr. of sja1000   : %d\n",hardware_p->candevice[i]->nr_sja1000_chips);
		for (j=0; j<hardware_p->candevice[i]->nr_82527_chips+hardware_p->candevice[i]->nr_sja1000_chips; j++) {
			DEBUGMSG("Chip%d type       : %s\n", j+1, hardware_p->candevice[i]->chip[j]->chip_type);
			DEBUGMSG("Chip base        : 0x%lx\n",hardware_p->candevice[i]->chip[j]->chip_base_addr);
			DEBUGMSG("Interrupt        : %d\n",hardware_p->candevice[i]->chip[j]->chip_irq);


			if (!strcmp(hardware_p->candevice[i]->chip[j]->chip_type,"i82527")) {
				for (k=0; k<15; k++)
					DEBUGMSG("Obj%d: minor: %d base: 0x%lx\n",k,hardware_p->candevice[i]->chip[j]->msgobj[k]->minor,hardware_p->candevice[i]->chip[j]->msgobj[k]->obj_base_addr);
			}

			if (!strcmp(hardware_p->candevice[i]->chip[j]->chip_type,"sja1000")) {
				for (k=0; k<1; k++)
					DEBUGMSG("Obj%d: minor: %d base: 0x%lx\n",k,hardware_p->candevice[i]->chip[j]->msgobj[k]->minor,hardware_p->candevice[i]->chip[j]->msgobj[k]->obj_base_addr);
			} 


		}
		i++;
	}
	return 0;
}