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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68knommu/kernel/comempci.c
downloadconfigs-2.6.12-rc2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/m68knommu/kernel/comempci.c')
-rw-r--r--arch/m68knommu/kernel/comempci.c989
1 files changed, 989 insertions, 0 deletions
diff --git a/arch/m68knommu/kernel/comempci.c b/arch/m68knommu/kernel/comempci.c
new file mode 100644
index 00000000000..8670938f110
--- /dev/null
+++ b/arch/m68knommu/kernel/comempci.c
@@ -0,0 +1,989 @@
+/*****************************************************************************/
+
+/*
+ * comemlite.c -- PCI access code for embedded CO-MEM Lite PCI controller.
+ *
+ * (C) Copyright 1999-2003, Greg Ungerer (gerg@snapgear.com).
+ * (C) Copyright 2000, Lineo (www.lineo.com)
+ */
+
+/*****************************************************************************/
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/ptrace.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+#include <asm/irq.h>
+#include <asm/anchor.h>
+
+#ifdef CONFIG_eLIA
+#include <asm/elia.h>
+#endif
+
+/*****************************************************************************/
+
+/*
+ * Debug configuration defines. DEBUGRES sets debugging output for
+ * the resource allocation phase. DEBUGPCI traces on pcibios_ function
+ * calls, and DEBUGIO traces all accesses to devices on the PCI bus.
+ */
+/*#define DEBUGRES 1*/
+/*#define DEBUGPCI 1*/
+/*#define DEBUGIO 1*/
+
+/*****************************************************************************/
+
+/*
+ * PCI markers for bus present and active slots.
+ */
+int pci_bus_is_present = 0;
+unsigned long pci_slotmask = 0;
+
+/*
+ * We may or may not need to swap the bytes of PCI bus tranfers.
+ * The endianess is re-roder automatically by the CO-MEM, but it
+ * will get the wrong byte order for a pure data stream.
+ */
+#define pci_byteswap 0
+
+
+/*
+ * Resource tracking. The CO-MEM part creates a virtual address
+ * space that all the PCI devices live in - it is not in any way
+ * directly mapped into the ColdFire address space. So we can
+ * really assign any resources we like to devices, as long as
+ * they do not clash with other PCI devices.
+ */
+unsigned int pci_iobase = PCIBIOS_MIN_IO; /* Arbitrary start address */
+unsigned int pci_membase = PCIBIOS_MIN_MEM; /* Arbitrary start address */
+
+#define PCI_MINIO 0x100 /* 256 byte minimum I/O */
+#define PCI_MINMEM 0x00010000 /* 64k minimum chunk */
+
+/*
+ * The CO-MEM's shared memory segment is visible inside the PCI
+ * memory address space. We need to keep track of the address that
+ * this is mapped at, to setup the bus masters pointers.
+ */
+unsigned int pci_shmemaddr;
+
+/*****************************************************************************/
+
+void pci_interrupt(int irq, void *id, struct pt_regs *fp);
+
+/*****************************************************************************/
+
+/*
+ * Some platforms have custom ways of reseting the PCI bus.
+ */
+
+void pci_resetbus(void)
+{
+#ifdef CONFIG_eLIA
+ int i;
+
+#ifdef DEBUGPCI
+ printk(KERN_DEBUG "pci_resetbus()\n");
+#endif
+
+ *((volatile unsigned short *) (MCF_MBAR+MCFSIM_PADDR)) |= eLIA_PCIRESET;
+ for (i = 0; (i < 1000); i++) {
+ *((volatile unsigned short *) (MCF_MBAR + MCFSIM_PADAT)) =
+ (ppdata | eLIA_PCIRESET);
+ }
+
+
+ *((volatile unsigned short *) (MCF_MBAR + MCFSIM_PADAT)) = ppdata;
+#endif
+}
+
+/*****************************************************************************/
+
+int pcibios_assign_resource_slot(int slot)
+{
+ volatile unsigned long *rp;
+ volatile unsigned char *ip;
+ unsigned int idsel, addr, val, align, i;
+ int bar;
+
+#ifdef DEBUGPCI
+ printk(KERN_INFO "pcibios_assign_resource_slot(slot=%x)\n", slot);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ idsel = COMEM_DA_ADDR(0x1 << (slot + 16));
+
+ /* Try to assign resource to each BAR */
+ for (bar = 0; (bar < 6); bar++) {
+ addr = COMEM_PCIBUS + PCI_BASE_ADDRESS_0 + (bar * 4);
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
+ val = rp[LREG(addr)];
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "-----------------------------------"
+ "-------------------------------------\n");
+ printk(KERN_DEBUG "BAR[%d]: read=%08x ", bar, val);
+#endif
+
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
+ rp[LREG(addr)] = 0xffffffff;
+
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
+ val = rp[LREG(addr)];
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "write=%08x ", val);
+#endif
+ if (val == 0) {
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "\n");
+#endif
+ continue;
+ }
+
+ /* Determine space required by BAR */
+ /* FIXME: this should go backwords from 0x80000000... */
+ for (i = 0; (i < 32); i++) {
+ if ((0x1 << i) & (val & 0xfffffffc))
+ break;
+ }
+
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "size=%08x(%d)\n", (0x1 << i), i);
+#endif
+ i = 0x1 << i;
+
+ /* Assign a resource */
+ if (val & PCI_BASE_ADDRESS_SPACE_IO) {
+ if (i < PCI_MINIO)
+ i = PCI_MINIO;
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "BAR[%d]: IO size=%08x iobase=%08x\n",
+ bar, i, pci_iobase);
+#endif
+ if (i > 0xffff) {
+ /* Invalid size?? */
+ val = 0 | PCI_BASE_ADDRESS_SPACE_IO;
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "BAR[%d]: too big for IO??\n", bar);
+#endif
+ } else {
+ /* Check for un-alignment */
+ if ((align = pci_iobase % i))
+ pci_iobase += (i - align);
+ val = pci_iobase | PCI_BASE_ADDRESS_SPACE_IO;
+ pci_iobase += i;
+ }
+ } else {
+ if (i < PCI_MINMEM)
+ i = PCI_MINMEM;
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "BAR[%d]: MEMORY size=%08x membase=%08x\n",
+ bar, i, pci_membase);
+#endif
+ /* Check for un-alignment */
+ if ((align = pci_membase % i))
+ pci_membase += (i - align);
+ val = pci_membase | PCI_BASE_ADDRESS_SPACE_MEMORY;
+ pci_membase += i;
+ }
+
+ /* Write resource back into BAR register */
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
+ rp[LREG(addr)] = val;
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "BAR[%d]: assigned bar=%08x\n", bar, val);
+#endif
+ }
+
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "-----------------------------------"
+ "-------------------------------------\n");
+#endif
+
+ /* Assign IRQ if one is wanted... */
+ ip = (volatile unsigned char *) (COMEM_BASE + COMEM_PCIBUS);
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
+
+ addr = (PCI_INTERRUPT_PIN & 0xfc) + (~PCI_INTERRUPT_PIN & 0x03);
+ if (ip[addr]) {
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
+ addr = (PCI_INTERRUPT_LINE & 0xfc)+(~PCI_INTERRUPT_LINE & 0x03);
+ ip[addr] = 25;
+#ifdef DEBUGRES
+ printk(KERN_DEBUG "IRQ LINE=25\n");
+#endif
+ }
+
+ return(0);
+}
+
+/*****************************************************************************/
+
+int pcibios_enable_slot(int slot)
+{
+ volatile unsigned long *rp;
+ volatile unsigned short *wp;
+ unsigned int idsel, addr;
+ unsigned short cmd;
+
+#ifdef DEBUGPCI
+ printk(KERN_DEBUG "pcibios_enbale_slot(slot=%x)\n", slot);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ wp = (volatile unsigned short *) COMEM_BASE;
+ idsel = COMEM_DA_ADDR(0x1 << (slot + 16));
+
+ /* Get current command settings */
+ addr = COMEM_PCIBUS + PCI_COMMAND;
+ addr = (addr & ~0x3) + (~addr & 0x02);
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
+ cmd = wp[WREG(addr)];
+ /*val = ((val & 0xff) << 8) | ((val >> 8) & 0xff);*/
+
+ /* Enable I/O and memory accesses to this device */
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
+ cmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
+ wp[WREG(addr)] = cmd;
+
+ return(0);
+}
+
+/*****************************************************************************/
+
+void pcibios_assign_resources(void)
+{
+ volatile unsigned long *rp;
+ unsigned long sel, id;
+ int slot;
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+
+ /*
+ * Do a quick scan of the PCI bus and see what is here.
+ */
+ for (slot = COMEM_MINDEV; (slot <= COMEM_MAXDEV); slot++) {
+ sel = COMEM_DA_CFGRD | COMEM_DA_ADDR(0x1 << (slot + 16));
+ rp[LREG(COMEM_DAHBASE)] = sel;
+ rp[LREG(COMEM_PCIBUS)] = 0; /* Clear bus */
+ id = rp[LREG(COMEM_PCIBUS)];
+ if ((id != 0) && ((id & 0xffff0000) != (sel & 0xffff0000))) {
+ printk(KERN_INFO "PCI: slot=%d id=%08x\n", slot, (int) id);
+ pci_slotmask |= 0x1 << slot;
+ pcibios_assign_resource_slot(slot);
+ pcibios_enable_slot(slot);
+ }
+ }
+}
+
+/*****************************************************************************/
+
+int pcibios_init(void)
+{
+ volatile unsigned long *rp;
+ unsigned long sel, id;
+ int slot;
+
+#ifdef DEBUGPCI
+ printk(KERN_DEBUG "pcibios_init()\n");
+#endif
+
+ pci_resetbus();
+
+ /*
+ * Do some sort of basic check to see if the CO-MEM part
+ * is present... This works ok, but I think we really need
+ * something better...
+ */
+ rp = (volatile unsigned long *) COMEM_BASE;
+ if ((rp[LREG(COMEM_LBUSCFG)] & 0xff) != 0x50) {
+ printk(KERN_INFO "PCI: no PCI bus present\n");
+ return(0);
+ }
+
+#ifdef COMEM_BRIDGEDEV
+ /*
+ * Setup the PCI bridge device first. It needs resources too,
+ * so that bus masters can get to its shared memory.
+ */
+ slot = COMEM_BRIDGEDEV;
+ sel = COMEM_DA_CFGRD | COMEM_DA_ADDR(0x1 << (slot + 16));
+ rp[LREG(COMEM_DAHBASE)] = sel;
+ rp[LREG(COMEM_PCIBUS)] = 0; /* Clear bus */
+ id = rp[LREG(COMEM_PCIBUS)];
+ if ((id == 0) || ((id & 0xffff0000) == (sel & 0xffff0000))) {
+ printk(KERN_INFO "PCI: no PCI bus bridge present\n");
+ return(0);
+ }
+
+ printk(KERN_INFO "PCI: bridge device at slot=%d id=%08x\n", slot, (int) id);
+ pci_slotmask |= 0x1 << slot;
+ pci_shmemaddr = pci_membase;
+ pcibios_assign_resource_slot(slot);
+ pcibios_enable_slot(slot);
+#endif
+
+ pci_bus_is_present = 1;
+
+ /* Get PCI irq for local vectoring */
+ if (request_irq(COMEM_IRQ, pci_interrupt, 0, "PCI bridge", NULL)) {
+ printk(KERN_WARNING "PCI: failed to acquire interrupt %d\n", COMEM_IRQ);
+ } else {
+ mcf_autovector(COMEM_IRQ);
+ }
+
+ pcibios_assign_resources();
+
+ return(0);
+}
+
+/*****************************************************************************/
+
+char *pcibios_setup(char *option)
+{
+ /* Nothing for us to handle. */
+ return(option);
+}
+/*****************************************************************************/
+
+void pcibios_fixup_bus(struct pci_bus *b)
+{
+}
+
+/*****************************************************************************/
+
+void pcibios_align_resource(void *data, struct resource *res, unsigned long size, unsigned long align)
+{
+}
+
+/*****************************************************************************/
+
+int pcibios_enable_device(struct pci_dev *dev, int mask)
+{
+ int slot;
+
+ slot = PCI_SLOT(dev->devfn);
+ if ((dev->bus == 0) && (pci_slotmask & (1 << slot)))
+ pcibios_enable_slot(slot);
+ return(0);
+}
+
+/*****************************************************************************/
+
+void pcibios_update_resource(struct pci_dev *dev, struct resource *root, struct resource *r, int resource)
+{
+ printk(KERN_WARNING "%s(%d): no support for changing PCI resources...\n",
+ __FILE__, __LINE__);
+}
+
+
+/*****************************************************************************/
+
+/*
+ * Local routines to interrcept the standard I/O and vector handling
+ * code. Don't include this 'till now - initialization code above needs
+ * access to the real code too.
+ */
+#include <asm/mcfpci.h>
+
+/*****************************************************************************/
+
+void pci_outb(unsigned char val, unsigned int addr)
+{
+ volatile unsigned long *rp;
+ volatile unsigned char *bp;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_outb(val=%02x,addr=%x)\n", val, addr);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ bp = (volatile unsigned char *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(addr);
+ addr = (addr & ~0x3) + (~addr & 0x03);
+ bp[(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))] = val;
+}
+
+/*****************************************************************************/
+
+void pci_outw(unsigned short val, unsigned int addr)
+{
+ volatile unsigned long *rp;
+ volatile unsigned short *sp;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_outw(val=%04x,addr=%x)\n", val, addr);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ sp = (volatile unsigned short *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(addr);
+ addr = (addr & ~0x3) + (~addr & 0x02);
+ if (pci_byteswap)
+ val = ((val & 0xff) << 8) | ((val >> 8) & 0xff);
+ sp[WREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))] = val;
+}
+
+/*****************************************************************************/
+
+void pci_outl(unsigned int val, unsigned int addr)
+{
+ volatile unsigned long *rp;
+ volatile unsigned int *lp;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_outl(val=%08x,addr=%x)\n", val, addr);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ lp = (volatile unsigned int *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(addr);
+
+ if (pci_byteswap)
+ val = (val << 24) | ((val & 0x0000ff00) << 8) |
+ ((val & 0x00ff0000) >> 8) | (val >> 24);
+
+ lp[LREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))] = val;
+}
+
+/*****************************************************************************/
+
+unsigned long pci_blmask[] = {
+ 0x000000e0,
+ 0x000000d0,
+ 0x000000b0,
+ 0x00000070
+};
+
+unsigned char pci_inb(unsigned int addr)
+{
+ volatile unsigned long *rp;
+ volatile unsigned char *bp;
+ unsigned long r;
+ unsigned char val;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_inb(addr=%x)\n", addr);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ bp = (volatile unsigned char *) COMEM_BASE;
+
+ r = COMEM_DA_IORD | COMEM_DA_ADDR(addr) | pci_blmask[(addr & 0x3)];
+ rp[LREG(COMEM_DAHBASE)] = r;
+
+ addr = (addr & ~0x3) + (~addr & 0x3);
+ val = bp[(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))];
+ return(val);
+}
+
+/*****************************************************************************/
+
+unsigned long pci_bwmask[] = {
+ 0x000000c0,
+ 0x000000c0,
+ 0x00000030,
+ 0x00000030
+};
+
+unsigned short pci_inw(unsigned int addr)
+{
+ volatile unsigned long *rp;
+ volatile unsigned short *sp;
+ unsigned long r;
+ unsigned short val;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_inw(addr=%x)", addr);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ r = COMEM_DA_IORD | COMEM_DA_ADDR(addr) | pci_bwmask[(addr & 0x3)];
+ rp[LREG(COMEM_DAHBASE)] = r;
+
+ sp = (volatile unsigned short *) COMEM_BASE;
+ addr = (addr & ~0x3) + (~addr & 0x02);
+ val = sp[WREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))];
+ if (pci_byteswap)
+ val = ((val & 0xff) << 8) | ((val >> 8) & 0xff);
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "=%04x\n", val);
+#endif
+ return(val);
+}
+
+/*****************************************************************************/
+
+unsigned int pci_inl(unsigned int addr)
+{
+ volatile unsigned long *rp;
+ volatile unsigned int *lp;
+ unsigned int val;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_inl(addr=%x)", addr);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ lp = (volatile unsigned int *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(addr);
+ val = lp[LREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))];
+
+ if (pci_byteswap)
+ val = (val << 24) | ((val & 0x0000ff00) << 8) |
+ ((val & 0x00ff0000) >> 8) | (val >> 24);
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "=%08x\n", val);
+#endif
+ return(val);
+}
+
+/*****************************************************************************/
+
+void pci_outsb(void *addr, void *buf, int len)
+{
+ volatile unsigned long *rp;
+ volatile unsigned char *bp;
+ unsigned char *dp = (unsigned char *) buf;
+ unsigned int a = (unsigned int) addr;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_outsb(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(a);
+
+ a = (a & ~0x3) + (~a & 0x03);
+ bp = (volatile unsigned char *)
+ (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
+
+ while (len--)
+ *bp = *dp++;
+}
+
+/*****************************************************************************/
+
+void pci_outsw(void *addr, void *buf, int len)
+{
+ volatile unsigned long *rp;
+ volatile unsigned short *wp;
+ unsigned short w, *dp = (unsigned short *) buf;
+ unsigned int a = (unsigned int) addr;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_outsw(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(a);
+
+ a = (a & ~0x3) + (~a & 0x2);
+ wp = (volatile unsigned short *)
+ (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
+
+ while (len--) {
+ w = *dp++;
+ if (pci_byteswap)
+ w = ((w & 0xff) << 8) | ((w >> 8) & 0xff);
+ *wp = w;
+ }
+}
+
+/*****************************************************************************/
+
+void pci_outsl(void *addr, void *buf, int len)
+{
+ volatile unsigned long *rp;
+ volatile unsigned long *lp;
+ unsigned long l, *dp = (unsigned long *) buf;
+ unsigned int a = (unsigned int) addr;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_outsl(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(a);
+
+ lp = (volatile unsigned long *)
+ (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
+
+ while (len--) {
+ l = *dp++;
+ if (pci_byteswap)
+ l = (l << 24) | ((l & 0x0000ff00) << 8) |
+ ((l & 0x00ff0000) >> 8) | (l >> 24);
+ *lp = l;
+ }
+}
+
+/*****************************************************************************/
+
+void pci_insb(void *addr, void *buf, int len)
+{
+ volatile unsigned long *rp;
+ volatile unsigned char *bp;
+ unsigned char *dp = (unsigned char *) buf;
+ unsigned int a = (unsigned int) addr;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_insb(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(a);
+
+ a = (a & ~0x3) + (~a & 0x03);
+ bp = (volatile unsigned char *)
+ (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
+
+ while (len--)
+ *dp++ = *bp;
+}
+
+/*****************************************************************************/
+
+void pci_insw(void *addr, void *buf, int len)
+{
+ volatile unsigned long *rp;
+ volatile unsigned short *wp;
+ unsigned short w, *dp = (unsigned short *) buf;
+ unsigned int a = (unsigned int) addr;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_insw(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(a);
+
+ a = (a & ~0x3) + (~a & 0x2);
+ wp = (volatile unsigned short *)
+ (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
+
+ while (len--) {
+ w = *wp;
+ if (pci_byteswap)
+ w = ((w & 0xff) << 8) | ((w >> 8) & 0xff);
+ *dp++ = w;
+ }
+}
+
+/*****************************************************************************/
+
+void pci_insl(void *addr, void *buf, int len)
+{
+ volatile unsigned long *rp;
+ volatile unsigned long *lp;
+ unsigned long l, *dp = (unsigned long *) buf;
+ unsigned int a = (unsigned int) addr;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_insl(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
+#endif
+
+ rp = (volatile unsigned long *) COMEM_BASE;
+ rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(a);
+
+ lp = (volatile unsigned long *)
+ (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
+
+ while (len--) {
+ l = *lp;
+ if (pci_byteswap)
+ l = (l << 24) | ((l & 0x0000ff00) << 8) |
+ ((l & 0x00ff0000) >> 8) | (l >> 24);
+ *dp++ = l;
+ }
+}
+
+/*****************************************************************************/
+
+struct pci_localirqlist {
+ void (*handler)(int, void *, struct pt_regs *);
+ const char *device;
+ void *dev_id;
+};
+
+struct pci_localirqlist pci_irqlist[COMEM_MAXPCI];
+
+/*****************************************************************************/
+
+int pci_request_irq(unsigned int irq,
+ void (*handler)(int, void *, struct pt_regs *),
+ unsigned long flags, const char *device, void *dev_id)
+{
+ int i;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_request_irq(irq=%d,handler=%x,flags=%x,device=%s,"
+ "dev_id=%x)\n", irq, (int) handler, (int) flags, device,
+ (int) dev_id);
+#endif
+
+ /* Check if this interrupt handler is already lodged */
+ for (i = 0; (i < COMEM_MAXPCI); i++) {
+ if (pci_irqlist[i].handler == handler)
+ return(0);
+ }
+
+ /* Find a free spot to put this handler */
+ for (i = 0; (i < COMEM_MAXPCI); i++) {
+ if (pci_irqlist[i].handler == 0) {
+ pci_irqlist[i].handler = handler;
+ pci_irqlist[i].device = device;
+ pci_irqlist[i].dev_id = dev_id;
+ return(0);
+ }
+ }
+
+ /* Couldn't fit?? */
+ return(1);
+}
+
+/*****************************************************************************/
+
+void pci_free_irq(unsigned int irq, void *dev_id)
+{
+ int i;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_free_irq(irq=%d,dev_id=%x)\n", irq, (int) dev_id);
+#endif
+
+ if (dev_id == (void *) NULL)
+ return;
+
+ /* Check if this interrupt handler is lodged */
+ for (i = 0; (i < COMEM_MAXPCI); i++) {
+ if (pci_irqlist[i].dev_id == dev_id) {
+ pci_irqlist[i].handler = NULL;
+ pci_irqlist[i].device = NULL;
+ pci_irqlist[i].dev_id = NULL;
+ break;
+ }
+ }
+}
+
+/*****************************************************************************/
+
+void pci_interrupt(int irq, void *id, struct pt_regs *fp)
+{
+ int i;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_interrupt(irq=%d,id=%x,fp=%x)\n", irq, (int) id, (int) fp);
+#endif
+
+ for (i = 0; (i < COMEM_MAXPCI); i++) {
+ if (pci_irqlist[i].handler)
+ (*pci_irqlist[i].handler)(irq,pci_irqlist[i].dev_id,fp);
+ }
+}
+
+/*****************************************************************************/
+
+/*
+ * The shared memory region is broken up into contiguous 512 byte
+ * regions for easy allocation... This is not an optimal solution
+ * but it makes allocation and freeing regions really easy.
+ */
+
+#define PCI_MEMSLOTSIZE 512
+#define PCI_MEMSLOTS (COMEM_SHMEMSIZE / PCI_MEMSLOTSIZE)
+
+char pci_shmemmap[PCI_MEMSLOTS];
+
+
+void *pci_bmalloc(int size)
+{
+ int i, j, nrslots;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_bmalloc(size=%d)\n", size);
+#endif
+
+ if (size <= 0)
+ return((void *) NULL);
+
+ nrslots = (size - 1) / PCI_MEMSLOTSIZE;
+
+ for (i = 0; (i < (PCI_MEMSLOTS-nrslots)); i++) {
+ if (pci_shmemmap[i] == 0) {
+ for (j = i+1; (j < (i+nrslots)); j++) {
+ if (pci_shmemmap[j])
+ goto restart;
+ }
+
+ for (j = i; (j <= i+nrslots); j++)
+ pci_shmemmap[j] = 1;
+ break;
+ }
+restart:
+ }
+
+ return((void *) (COMEM_BASE + COMEM_SHMEM + (i * PCI_MEMSLOTSIZE)));
+}
+
+/*****************************************************************************/
+
+void pci_bmfree(void *mp, int size)
+{
+ int i, j, nrslots;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_bmfree(mp=%x,size=%d)\n", (int) mp, size);
+#endif
+
+ nrslots = size / PCI_MEMSLOTSIZE;
+ i = (((unsigned long) mp) - (COMEM_BASE + COMEM_SHMEM)) /
+ PCI_MEMSLOTSIZE;
+
+ for (j = i; (j < (i+nrslots)); j++)
+ pci_shmemmap[j] = 0;
+}
+
+/*****************************************************************************/
+
+unsigned long pci_virt_to_bus(volatile void *address)
+{
+ unsigned long l;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_virt_to_bus(address=%x)", (int) address);
+#endif
+
+ l = ((unsigned long) address) - COMEM_BASE;
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "=%x\n", (int) (l+pci_shmemaddr));
+#endif
+ return(l + pci_shmemaddr);
+}
+
+/*****************************************************************************/
+
+void *pci_bus_to_virt(unsigned long address)
+{
+ unsigned long l;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_bus_to_virt(address=%x)", (int) address);
+#endif
+
+ l = address - pci_shmemaddr;
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "=%x\n", (int) (address + COMEM_BASE));
+#endif
+ return((void *) (address + COMEM_BASE));
+}
+
+/*****************************************************************************/
+
+void pci_bmcpyto(void *dst, void *src, int len)
+{
+ unsigned long *dp, *sp, val;
+ unsigned char *dcp, *scp;
+ int i, j;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_bmcpyto(dst=%x,src=%x,len=%d)\n", (int)dst, (int)src, len);
+#endif
+
+ dp = (unsigned long *) dst;
+ sp = (unsigned long *) src;
+ i = len >> 2;
+
+#if 0
+ printk(KERN_INFO "DATA:");
+ scp = (unsigned char *) sp;
+ for (i = 0; (i < len); i++) {
+ if ((i % 16) == 0) printk(KERN_INFO "\n%04x: ", i);
+ printk(KERN_INFO "%02x ", *scp++);
+ }
+ printk(KERN_INFO "\n");
+#endif
+
+ for (j = 0; (i >= 0); i--, j++) {
+ val = *sp++;
+ val = (val << 24) | ((val & 0x0000ff00) << 8) |
+ ((val & 0x00ff0000) >> 8) | (val >> 24);
+ *dp++ = val;
+ }
+
+ if (len & 0x3) {
+ dcp = (unsigned char *) dp;
+ scp = ((unsigned char *) sp) + 3;
+ for (i = 0; (i < (len & 0x3)); i++)
+ *dcp++ = *scp--;
+ }
+}
+
+/*****************************************************************************/
+
+void pci_bmcpyfrom(void *dst, void *src, int len)
+{
+ unsigned long *dp, *sp, val;
+ unsigned char *dcp, *scp;
+ int i;
+
+#ifdef DEBUGIO
+ printk(KERN_DEBUG "pci_bmcpyfrom(dst=%x,src=%x,len=%d)\n",(int)dst,(int)src,len);
+#endif
+
+ dp = (unsigned long *) dst;
+ sp = (unsigned long *) src;
+ i = len >> 2;
+
+ for (; (i >= 0); i--) {
+ val = *sp++;
+ val = (val << 24) | ((val & 0x0000ff00) << 8) |
+ ((val & 0x00ff0000) >> 8) | (val >> 24);
+ *dp++ = val;
+ }
+
+ if (len & 0x3) {
+ dcp = ((unsigned char *) dp) + 3;
+ scp = (unsigned char *) sp;
+ for (i = 0; (i < (len & 0x3)); i++)
+ *dcp++ = *scp--;
+ }
+
+#if 0
+ printk(KERN_INFO "DATA:");
+ dcp = (unsigned char *) dst;
+ for (i = 0; (i < len); i++) {
+ if ((i % 16) == 0) printk(KERN_INFO "\n%04x: ", i);
+ printk(KERN_INFO "%02x ", *dcp++);
+ }
+ printk(KERN_INFO "\n");
+#endif
+}
+
+/*****************************************************************************/
+
+void *pci_alloc_consistent(struct pci_dev *dev, size_t size, dma_addr_t *dma_addr)
+{
+ void *mp;
+ if ((mp = pci_bmalloc(size)) != NULL) {
+ dma_addr = mp - (COMEM_BASE + COMEM_SHMEM);
+ return(mp);
+ }
+ *dma_addr = (dma_addr_t) NULL;
+ return(NULL);
+}
+
+/*****************************************************************************/
+
+void pci_free_consistent(struct pci_dev *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr)
+{
+ pci_bmfree(cpu_addr, size);
+}
+
+/*****************************************************************************/