install_ss.c

pci-serial.rar是 PCI转串口驱动程序

#include <stdio.h>
#include <pci/pci.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#include <termios.h>
#include <linux/serial.h>
#include <asm/ioctls.h>
#define MAX_IO_BASE 8 
#define MAX_IRQ 4

static struct pci_access *pacc;
static struct pci_filter fliter;
int count=0;//inster board numbers	
unsigned int ioaddress[MAX_IO_BASE];
int irq[MAX_IRQ];
int baud_base=115200;
int uart=PORT_16550A;


void set_serial(char *device, unsigned int port, int uart, int irq,int baud_base)
{
	struct serial_struct old_serinfo, new_serinfo;
	int	fd;
	if ((fd = open(device, O_RDWR|O_NONBLOCK)) < 0) 
	{
		perror(device);
		exit(201);
	}
	if (ioctl(fd, TIOCGSERIAL, &old_serinfo) < 0) 
	{
		perror("Cannot get serial info");
		exit(1);
	}
	new_serinfo = old_serinfo;
	new_serinfo.port = port;
	new_serinfo.irq = irq;
	new_serinfo.type = uart;
	if (new_serinfo.type < 0) 
	{
		printf("Illegal UART type!\n");
		exit(1);
	}
	new_serinfo.baud_base = baud_base;
	if (ioctl(fd, TIOCSSERIAL, &new_serinfo) < 0) 
	{
		perror("Cannot set serial info");
		exit(1);
	}
	close(fd);
}


static void scan_devices(void)
{
	struct pci_dev *p;
	unsigned int vendor;
	unsigned short status;
	pci_scan_bus(pacc);
	for(p=pacc->devices;p;p=p->next)
	{	
		if( (pci_read_word(p,0x10)&1) && (pci_read_word(p,0x14)&1) && (pci_read_word(p,0x40)==pci_read_word(p,0x44)) && (pci_read_word(p,0x42)==0x8000) && (pci_read_word(p,0x46)==0x0000))//find CH352
		{
			ioaddress[2*count]=p->base_addr[0];
			ioaddress[2*count+1]=p->base_addr[1];
			irq[count]=p->irq;
			count++;
		}
		
	}
}

int main(void)
{
	char *dev1="/dev/ttyS2";
	char *dev2="/dev/ttyS3";
	char *dev3="/dev/ttyS4";
	char *dev4="/dev/ttyS5";
	char *dev5="/dev/ttyS6";
	char *dev6="/dev/ttyS7";
	char *dev7="/dev/ttyS8";
	char *dev8="/dev/ttyS9";
	pacc=pci_alloc();
	pci_filter_init(pacc,&fliter);
	pci_init(pacc);
	scan_devices();
	switch(count)
	{
		case 0:	break;//don't find CH352
		case 1:	set_serial(dev1,ioaddress[0]-1,uart,irq[0],baud_base);//find one CH352
				set_serial(dev2,ioaddress[1]-1,uart,irq[0],baud_base);
				break;
		case 2:	set_serial(dev1,ioaddress[0]-1,uart,irq[0],baud_base);//find two CH352
				set_serial(dev2,ioaddress[1]-1,uart,irq[0],baud_base);
				set_serial(dev3,ioaddress[2]-1,uart,irq[1],baud_base);
				set_serial(dev4,ioaddress[3]-1,uart,irq[1],baud_base);	
				break;
		case 3:	set_serial(dev1,ioaddress[0]-1,uart,irq[0],baud_base);//find three CH352
				set_serial(dev2,ioaddress[1]-1,uart,irq[0],baud_base);
				set_serial(dev3,ioaddress[2]-1,uart,irq[1],baud_base);
				set_serial(dev4,ioaddress[3]-1,uart,irq[1],baud_base);
				set_serial(dev5,ioaddress[4]-1,uart,irq[2],baud_base);
				set_serial(dev6,ioaddress[5]-1,uart,irq[2],baud_base);
				break;
		case 4:	set_serial(dev1,ioaddress[0]-1,uart,irq[0],baud_base);//find four CH352
				set_serial(dev2,ioaddress[1]-1,uart,irq[0],baud_base);
				set_serial(dev3,ioaddress[2]-1,uart,irq[1],baud_base);
				set_serial(dev4,ioaddress[3]-1,uart,irq[1],baud_base);
				set_serial(dev5,ioaddress[4]-1,uart,irq[2],baud_base);
				set_serial(dev6,ioaddress[5]-1,uart,irq[2],baud_base);
				set_serial(dev7,ioaddress[6]-1,uart,irq[3],baud_base);
				set_serial(dev8,ioaddress[7]-1,uart,irq[3],baud_base);
		defaule:break;
	}
	pci_cleanup(pacc);
	return 0;
}