#include "u.h"#include "../port/lib.h"#include "mem.h"#include "dat.h"#include "fns.h"#include "io.h"#include "../port/error.h"#include "../port/uart.h" extern PhysUart i8250physuart;extern PhysUart pciphysuart;extern void* i8250alloc(int, int, int); static Uart*uartpci(int ctlrno, Pcidev* p, int barno, int n, int freq, char* name){	int i, io;	void *ctlr;	char buf[64];	Uart *head, *uart; 	io = p->mem[barno].bar & ~0x01;	snprint(buf, sizeof(buf), "%s%d", pciphysuart.name, ctlrno);	if(ioalloc(io, p->mem[barno].size, 0, buf) < 0){		print("uartpci: I/O 0x%uX in use\n", io);		return nil;	} 	head = uart = malloc(sizeof(Uart)*n); 	for(i = 0; i < n; i++){		ctlr = i8250alloc(io, p->intl, p->tbdf);		io += 8;		if(ctlr == nil)			continue; 		uart->regs = ctlr;		snprint(buf, sizeof(buf), "%s.%8.8uX", name, p->tbdf);		kstrdup(&uart->name, buf);		uart->freq = freq;		uart->phys = &i8250physuart;		if(uart != head)			(uart-1)->next = uart;		uart++;	} 	return head;} static Uart*uartpcipnp(void){	Pcidev *p;	char *name;	int ctlrno, n, subid;	Uart *head, *tail, *uart; 	/*	 * Loop through all PCI devices looking for simple serial	 * controllers (ccrb == 0x07) and configure the ones which	 * are familiar. All suitable devices are configured to	 * simply point to the generic i8250 driver.	 */	head = tail = nil;	ctlrno = 0;	for(p = pcimatch(nil, 0, 0); p != nil; p = pcimatch(p, 0, 0)){		if(p->ccrb != 0x07 || p->ccru != 0)			continue; 		switch((p->did<<16)|p->vid){		default:			continue;		case (0x9050<<16)|0x10B5:	/* Perle PCI-Fast4 series */		case (0x9030<<16)|0x10B5:	/* Perle Ultraport series */			/*			 * These devices consists of a PLX bridge (the above			 * PCI VID+DID) behind which are some 16C654 UARTs.			 * Must check the subsystem VID and DID for correct			 * match.			 */			subid = pcicfgr16(p, PciSVID);			subid |= pcicfgr16(p, PciSID)<<16;			switch(subid){			default:				continue;			case (0x0011<<16)|0x12E0:	/* Perle PCI-Fast16 */				n = 16;				name = "PCI-Fast16";				break;			case (0x0021<<16)|0x12E0:	/* Perle PCI-Fast8 */				n = 8;				name = "PCI-Fast8";				break;			case (0x0031<<16)|0x12E0:	/* Perle PCI-Fast4 */				n = 4;				name = "PCI-Fast4";				break;			case (0x0021<<16)|0x155F:	/* Perle Ultraport8 */				n = 8;				name = "Ultraport8";	/* 16C754 UARTs */				break;			}			uart = uartpci(ctlrno, p, 2, n, 7372800, name);			if(uart == nil)				continue;			break;		} 		if(head != nil)			tail->next = uart;		else			head = uart;		for(tail = uart; tail->next != nil; tail = tail->next)			;		ctlrno++;	} 	return head;} PhysUart pciphysuart = {	.name		= "UartPCI",	.pnp		= uartpcipnp,	.enable		= nil,	.disable	= nil,	.kick		= nil,	.dobreak	= nil,	.baud		= nil,	.bits		= nil,	.stop		= nil,	.parity		= nil,	.modemctl	= nil,	.rts		= nil,	.dtr		= nil,	.status		= nil,	.fifo		= nil,};