uartisa.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 #include "u.h"
    2 #include "../port/lib.h"
    3 #include "mem.h"
    4 #include "dat.h"
    5 #include "fns.h"
    6 #include "io.h"
    7 #include "../port/error.h"
    8 
    9 extern PhysUart i8250physuart;
   10 extern PhysUart isaphysuart;
   11 extern void* i8250alloc(int, int, int);
   12 
   13 static Uart*
   14 uartisa(int ctlrno, ISAConf* isa)
   15 {
   16         int io;
   17         void *ctlr;
   18         Uart *uart;
   19         char buf[64];
   20 
   21         io = isa->port;
   22         snprint(buf, sizeof(buf), "%s%d", isaphysuart.name, ctlrno);
   23         if(ioalloc(io, 8, 0, buf) < 0){
   24                 print("uartisa: I/O 0x%uX in use\n", io);
   25                 return nil;
   26         }
   27 
   28         uart = malloc(sizeof(Uart));
   29         ctlr = i8250alloc(io, isa->irq, BUSUNKNOWN);
   30         if(ctlr == nil){
   31                 iofree(io);
   32                 free(uart);
   33                 return nil;
   34         }
   35 
   36         uart->regs = ctlr;
   37         snprint(buf, sizeof(buf), "COM%d", ctlrno+1);
   38         kstrdup(&uart->name, buf);
   39         uart->freq = isa->freq;
   40         uart->phys = &i8250physuart;
   41 
   42         return uart;
   43 }
   44 
   45 static Uart*
   46 uartisapnp(void)
   47 {
   48         int ctlrno;
   49         ISAConf isa;
   50         Uart *head, *tail, *uart;
   51 
   52         /*
   53          * Look for up to 4 discrete UARTs on the ISA bus.
   54          * All suitable devices are configured to simply point
   55          * to the generic i8250 driver.
   56          */
   57         head = tail = nil;
   58         for(ctlrno = 2; ctlrno < 6; ctlrno++){
   59                 memset(&isa, 0, sizeof(isa));
   60                 if(!isaconfig("uart", ctlrno, &isa))
   61                         continue;
   62                 if(strcmp(isa.type, "isa") != 0)
   63                         continue;
   64                 if(isa.port == 0 || isa.irq == 0)
   65                         continue;
   66                 if(isa.freq == 0)
   67                         isa.freq = 1843200;
   68                 uart = uartisa(ctlrno, &isa);
   69                 if(uart == nil)
   70                         continue;
   71                 if(head != nil)
   72                         tail->next = uart;
   73                 else
   74                         head = uart;
   75                 tail = uart;
   76         }
   77 
   78         return head;
   79 }
   80 
   81 PhysUart isaphysuart = {
   82         .name           = "UartISA",
   83         .pnp            = uartisapnp,
   84         .enable         = nil,
   85         .disable        = nil,
   86         .kick           = nil,
   87         .dobreak        = nil,
   88         .baud           = nil,
   89         .bits           = nil,
   90         .stop           = nil,
   91         .parity         = nil,
   92         .modemctl       = nil,
   93         .rts            = nil,
   94         .dtr            = nil,
   95         .status         = nil,
   96         .fifo           = nil,
   97 };

Cache object: 1907c28526e9076041928865eb419de6

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/pc/uartisa.c

FreeBSD/Linux Kernel Cross Reference
sys/pc/uartisa.c