Date: Sun, 17 Sep 2000 19:20:43 -0700 (PDT) From: papowell@astart.com To: freebsd-hackers@freebsd.org Subject: Device driver, memory map failing, and it is probably obvious Message-ID: <200009180220.TAA12263@h4.private>
next in thread | raw e-mail | index | archive | help
I am making a driver for a VERY old PCI device.
I decided to try using the new 'bus_resource' facilities, and came up
with the oddest error.
First, here is my 'probe' routine:
> static int
> digic_probe(device_t dev)
> {
> static struct digic_type *t;
> int vendor = pci_get_vendor(dev);
> int did = pci_get_device(dev);
> DPRINTF(("myprobe: vendor 0x%x, device 0x%x\n",
> vendor, did ));
> for( t = digic_devs; t->vid; ++t ){
> if( (t->vid == vendor) && (t->did == did) ){
> DPRINTF(("found '%s'\n", t->name );
> device_set_desc(dev,t->name));
> return(0);
> }
> }
> return( ENXIO );
> }
And here is the output it puts out (from dmesg):
> Copyright (c) 1992-2000 The FreeBSD Project.
> ....
> myprobe: vendor 0x1106, device 0x597
> pcib2: <VIA 82C598MVP (Apollo MVP3) PCI-PCI (AGP) bridge> at device 1.0 on pci0
> pci1: <PCI bus> on pcib2
> myprobe: vendor 0x1002, device 0x4742
Yes it is seeing things...
> pci1: <ATI Mach64-GB graphics accelerator> at 0.0 irq 11
> isab0: <VIA 82C596B PCI-ISA bridge> at device 7.0 on pci0
> isa0: <ISA bus> on isab0
....
> found 'Digi International PCI Classic 8 Serial Adapter'
> my0: <Digi International PCI Classic 8 Serial Adapter> \
port 0xdc00-0xdcff,0xd800-0xd87f mem 0xea400000-0xea4000ff,0xea402000-0xea40207f \
irq 12 at device 10.0 on pci0
> digic_attach: unit 0, irq 12, slot 10, progif 0x0, iobase 0xd801, membase 0xea402000, irqline 0x10c
> my0: couldn't map memory
> device_probe_and_attach: my0 attach returned 6
So it found the card, discovered the vintage hardware id, and printed it out.
The we call the attach routine:
> static int
> digic_attach( device_t dev )
> {
> struct digic_softc *digic;
> int unit;
> int irq, slot, progif, iobase, membase, irqline;
> int error = 0;
> void *ih = 0;
>
> /* get the sc structure */
> digic = device_get_softc(dev);
> bzero(digic,sizeof(digic[0]));
> unit = device_get_unit(dev);
> irq = pci_get_irq(dev);
> slot = pci_get_slot(dev);
> progif = pci_get_progif(dev);
>
> #define WB_PCI_LOMEM 0x10
> #define WB_PCI_LOIO 0x14
> #define WB_PCI_INTLINE 0x3c
> iobase = pci_read_config(dev, WB_PCI_LOIO, 4);
> membase = pci_read_config(dev, WB_PCI_LOMEM, 4);
> irqline = pci_read_config(dev, WB_PCI_INTLINE, 4);
>
> DPRINTF(("digic_attach: unit %d, irq %d, slot %d, progif 0x%x, iobase 0x%x, membase 0x%x, irqline 0x%x\n",
> unit, irq, slot, progif, iobase, membase, irqline ));
>
>
> switch( pci_get_device(dev) ){
> case PCI_CLASSIC_4: digic->digic_ports = 4; break;
> case PCI_CLASSIC_8: digic->digic_ports = 8; break;
> default:
> device_printf(dev,"digic_attach: bad device id! %d", pci_get_device(dev));
> goto fail;
> }
>
> /* now get the memory resources */
> digic->digic_mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
> &digic->digic_mem_rid,
> 0, ~0, 256, RF_ACTIVE|RF_SHAREABLE);
> if (!digic->digic_mem_res) {
> device_printf(dev, "couldn't map memory\n");
> goto fail;
> }
Now, I am SURE that I must be doing something stupid here - but I snipped this code
right out of the code for another driver, and this one works.
The only puzzle is:
> my0: <Digi International PCI Classic 8 Serial Adapter> \
port 0xdc00-0xdcff,0xd800-0xd87f mem 0xea400000-0xea4000ff,0xea402000-0xea40207f \
irq 12 at device 10.0 on pci0
Note that the diagnostic output indicates some VERY strange ranges.
Could this be the problem?
Patrick Powell
Patrick Powell Astart Technologies,
papowell@astart.com 9475 Chesapeake Drive, Suite D,
Network and System San Diego, CA 92123
Consulting 858-874-6543 FAX 858-279-8424
LPRng - Print Spooler (http://www.astart.com)
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200009180220.TAA12263>