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linux/arch/m68knommu/kernel/comempci.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-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!
2005-04-16 15:20:36 -07:00

990 lines
25 KiB
C
Raw Blame History

/*****************************************************************************/
/*
* 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);
}
/*****************************************************************************/
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