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Diffstat (limited to 'sys/i386/pci/pci.c')
-rw-r--r--sys/i386/pci/pci.c494
1 files changed, 494 insertions, 0 deletions
diff --git a/sys/i386/pci/pci.c b/sys/i386/pci/pci.c
new file mode 100644
index 0000000000000..878c97c681653
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+++ b/sys/i386/pci/pci.c
@@ -0,0 +1,494 @@
+/**************************************************************************
+**
+** $Id: pci.c,v 2.0.0.1 94/07/19 19:06:44 wolf Exp $
+**
+** General subroutines for the PCI bus on 80*86 systems.
+** pci_configure ()
+**
+**-------------------------------------------------------------------------
+**
+** Copyright (c) 1994 Wolfgang Stanglmeier, Koeln, Germany
+** <wolf@dentaro.GUN.de>
+**
+** This is a beta version - use with care.
+**
+**-------------------------------------------------------------------------
+**
+** $Log: pci.c,v $
+** Revision 2.0.0.1 94/07/19 19:06:44 wolf
+** New vendor entry: MATROX
+**
+** Revision 2.0 94/07/10 15:53:29 wolf
+** FreeBSD release.
+**
+** Revision 1.0 94/06/07 20:02:19 wolf
+** Beta release.
+**
+***************************************************************************
+*/
+
+#include <pci.h>
+#if NPCI > 0
+
+/*========================================================
+**
+** Configuration
+**
+**========================================================
+*/
+
+/*
+** maximum number of devices which share one interrupt line
+*/
+
+#define PCI_MAX_DPI 1
+
+/*
+** there may be up to 255 busses on pci.
+** don't probe them all :-)
+*/
+
+#define FIRST_BUS 0
+#define LAST_BUS 0
+
+/*
+** there may be up to 32 devices per bus.
+** do probe them all ;-)
+*/
+
+#define FIRST_DEVICE 0
+#define LAST_DEVICE 31
+
+/*========================================================
+**
+** #includes and declarations
+**
+**========================================================
+*/
+
+#include <types.h>
+#include <cdefs.h>
+#include <errno.h>
+#include <param.h>
+
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+
+#include <i386/isa/icu.h>
+#include <i386/isa/isa.h>
+#include <i386/isa/isa_device.h>
+
+#include <i386/pci/pci.h>
+#include <i386/pci/pci_device.h>
+#include <i386/pci/pcibios.h>
+
+
+static char ident[] =
+ "\n$Id: pci.c,v 2.0.0.1 94/07/19 19:06:44 wolf Exp $\n"
+ "Copyright (c) 1994, Wolfgang Stanglmeier\n";
+
+/*
+** Function prototypes missing in system headers
+*/
+
+extern int printf();
+extern int ffs();
+extern pmap_t pmap_kernel(void);
+
+/*
+** function prototypes
+*/
+
+int pci_map_mem
+ (pcici_t tag, u_long reg, u_long *va, vm_offset_t *pa);
+int pci_map_port (pcici_t tag, u_long reg, u_short* pa);
+void pci_configure (void);
+
+/*========================================================
+**
+** Autoconfiguration (of isa bus) (Free/386)
+**
+**========================================================
+*/
+
+/*
+** per device (interrupt) data structure.
+*/
+
+static struct {
+ u_short number;
+ u_short isanum;
+ struct {
+ int (*proc)(int dev);
+ dev_t unit;
+ } vector[PCI_MAX_DPI];
+} pcidata [NPCI];
+
+#ifndef __NetBSD__
+
+/*
+** check device ready
+*/
+static int pciprobe (struct isa_device *dev)
+{
+ if (dev->id_unit >= NPCI)
+ return (0);
+
+ if (!pci_conf_mode())
+ return (0);
+
+ return (1);
+}
+
+/*
+** initialize the driver structure
+*/
+static int pciattach (struct isa_device *isdp)
+{
+ pcidata[isdp->id_unit].number = 0;
+ pcidata[isdp->id_unit].isanum = ffs(isdp->id_irq)-1;
+ return (1);
+}
+
+/*
+** ISA driver structure
+*/
+
+struct isa_driver pcidriver = {
+ pciprobe,
+ pciattach,
+ "pci"
+};
+
+/*========================================================
+**
+** Interrupt forward from isa to pci devices.
+**
+**========================================================
+*/
+
+
+void pciintr (int unit)
+{
+ u_short i;
+ if (unit >= NPCI) return;
+
+#if defined (GENERICAH) || defined (GENERICBT) || defined (GENERICNCR) \
+ || defined (GENERICAHA) || defined (GENERICISA)
+ for (unit=0; unit < NPCI; unit++)
+#endif
+
+ for (i=0; i<pcidata[unit].number; i++) {
+ (void)(*pcidata[unit].vector[i].proc)(pcidata[unit].vector[i].unit);
+ };
+}
+
+#endif /* __NetBSD__ */
+
+/*========================================================
+**
+** Autoconfiguration of pci devices.
+**
+** This is reverse to the isa configuration.
+** (1) find a pci device.
+** (2) look for a driver.
+**
+**========================================================
+*/
+
+/*--------------------------------------------------------
+**
+** The pci devices can be mapped to any address.
+** As default we start at the last gigabyte.
+**
+**--------------------------------------------------------
+*/
+
+#ifndef PCI_PMEM_START
+#define PCI_PMEM_START 0xc0000000
+#endif
+
+static vm_offset_t pci_paddr = PCI_PMEM_START;
+
+/*---------------------------------------------------------
+**
+** pci_configure ()
+**
+**---------------------------------------------------------
+*/
+
+void pci_configure()
+{
+ u_char bus, device, reg;
+ pcici_t tag;
+ pcidi_t type;
+ u_long data;
+ int unit;
+ int intpin;
+ int pci_mode;
+
+ struct pci_driver *drp;
+ struct pci_device *dvp;
+
+ /*
+ ** check pci bus present
+ */
+
+ pci_mode = pci_conf_mode ();
+ if (!pci_mode) return;
+
+ /*
+ ** hello world ..
+ */
+
+ printf ("PCI configuration mode %d.\n", pci_mode);
+
+ for (bus=FIRST_BUS;bus<=LAST_BUS; bus++)
+ for (device=FIRST_DEVICE; device<=LAST_DEVICE; device ++) {
+ tag = pcitag (bus, device, 0);
+ type = pci_conf_read (tag, 0);
+
+ if ((!type) || (type==0xfffffffful)) continue;
+ printf ("on pci%d:%d ", bus, device);
+
+ /*
+ ** lookup device in ioconfiguration:
+ */
+
+ for (dvp = pci_devtab; drp=dvp->pd_driver; dvp++) {
+ if (drp->device_id == type) break;
+ };
+
+ if (!drp) {
+
+ /*
+ ** not found
+ */
+
+ switch (type & 0xffff) {
+
+ case 0x1002:
+ printf ("ATI TECHNOLOGIES INC");
+ break;
+ case 0x101A:
+ printf ("NCR");
+ break;
+ case 0x102B:
+ printf ("MATROX");
+ break;
+ case 0x1045:
+ printf ("OPTI");
+ break;
+ case 0x8086:
+ printf ("INTEL CORPORATION");
+ break;
+
+ default:
+ printf ("vendor=%x", type & 0xffff);
+ };
+
+ switch (type) {
+
+ case 0x04848086:
+ printf (" 82378IB pci-isa bridge");
+ break;
+ case 0x04838086:
+ printf (" 82424ZX cache dram controller");
+ break;
+ case 0x04828086:
+ printf (" 82375EB pci-eisa bridge");
+ break;
+ case 0x04A38086:
+ printf (" 82434LX pci cache memory controller");
+ break;
+ default:
+ printf (", device=%x", type >> 16);
+ };
+ printf (" [not supported]\n");
+
+ for (reg=0x10; reg<=0x20; reg+=4) {
+ data = pci_conf_read (tag, reg);
+ if (!data) continue;
+ switch (data&7) {
+
+ case 1:
+ case 5:
+ printf (" map(%x): io(%x)\n",
+ reg, data & ~3);
+ break;
+ case 0:
+ printf (" map(%x): mem32(%x)\n",
+ reg, data & ~7);
+ break;
+ case 2:
+ printf (" map(%x): mem20(%x)\n",
+ reg, data & ~7);
+ break;
+ case 4:
+ printf (" map(%x): mem64(%x)\n",
+ reg, data & ~7);
+ break;
+ };
+ };
+ continue;
+ };
+
+ /*
+ ** found it.
+ ** probe returns the device unit.
+ */
+
+ printf ("<%s>", drp -> vendor);
+
+ unit = (*drp->probe) (tag);
+
+ if (unit<0) {
+ printf (" probe failed.\n");
+ continue;
+ };
+
+ /*
+ ** install interrupts
+ */
+
+ intpin = (pci_conf_read (tag, 0x3c) >> 8) & 0xff;
+ if (intpin) {
+ printf (" irq %c", 0x60+intpin);
+ intpin--;
+ if (intpin < NPCI) {
+ u_short entry = pcidata[intpin].number;
+ if (entry < PCI_MAX_DPI) {
+ pcidata[intpin].vector[entry].proc = drp->intr;
+ pcidata[intpin].vector[entry].unit = unit;
+ entry++;
+ };
+ printf (" isa=%d [%d]",pcidata[intpin].isanum, entry);
+ pcidata[intpin].number=entry;
+ } else printf (" not installed");
+ };
+
+ /*
+ ** enable memory access
+ */
+ data = pci_conf_read (tag, 0x04) & 0xffff | 0x0002;
+ pci_conf_write (tag, (u_char) 0x04, data);
+
+ /*
+ ** attach device
+ ** may produce additional log messages,
+ ** i.e. when installing subdevices.
+ */
+
+ printf (" as %s%d\n", drp->name,unit);
+ (void) (*drp->attach) (tag);
+
+ };
+
+ printf ("pci uses physical addresses from %x to %x\n",
+ PCI_PMEM_START, pci_paddr);
+}
+
+/*-----------------------------------------------------------------------
+**
+** Map device into virtual and physical space
+**
+**-----------------------------------------------------------------------
+*/
+
+extern vm_map_t kernel_map;
+
+int pci_map_port (pcici_t tag, u_long reg, u_short* pa)
+{
+ /*
+ ** @MAPIO@ not yet implemented.
+ */
+ return (ENOSYS);
+}
+
+
+int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa)
+{
+ u_long data, result;
+ vm_size_t vsize;
+ vm_offset_t vaddr;
+
+ /*
+ ** sanity check
+ */
+
+ if (reg <= 0x10 || reg >= 0x20 || (reg & 3))
+ return (EINVAL);
+
+ /*
+ ** get size and type of memory
+ */
+
+ pci_conf_write (tag, reg, 0xfffffffful);
+ data = pci_conf_read (tag, reg);
+
+ switch (data & 0x0f) {
+
+ case 0x0: /* 32 bit non cachable */
+ break;
+
+ default: /* unknown */
+ return (EINVAL);
+ };
+
+ vsize = round_page (-(data & 0xfffffff0));
+
+ printf (" memory size=0x%x", vsize);
+
+ if (!vsize) return (EINVAL);
+
+ /*
+ ** try to map device to virtual space
+ */
+
+ vaddr = vm_map_min (kernel_map);
+
+ result = vm_map_find (kernel_map, (void*)0, (vm_offset_t) 0,
+ &vaddr, vsize, TRUE);
+
+ if (result != KERN_SUCCESS) {
+ printf (" vm_map_find failed(%d)\n", result);
+ return (ENOMEM);
+ };
+
+ /*
+ ** align physical address to virtual size
+ */
+
+ if (data = pci_paddr % vsize)
+ pci_paddr += vsize - data;
+
+ /*
+ ** display values.
+ */
+
+ printf (" virtual=0x%x physical=0x%x\n", vaddr, pci_paddr);
+
+ *va = vaddr;
+ *pa = pci_paddr;
+
+ /*
+ ** set device address
+ */
+
+ pci_conf_write (tag, reg, pci_paddr);
+
+ /*
+ ** map physical
+ */
+
+ while (vsize >= NBPG) {
+ pmap_enter (pmap_kernel(), vaddr, pci_paddr,
+ VM_PROT_READ|VM_PROT_WRITE, TRUE);
+ vaddr += NBPG;
+ pci_paddr += NBPG;
+ vsize -= NBPG;
+ };
+
+ return (0);
+}
+#endif
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