diff options
Diffstat (limited to 'arch/m68knommu/kernel/comempci.c')
| -rw-r--r-- | arch/m68knommu/kernel/comempci.c | 980 |
1 files changed, 0 insertions, 980 deletions
diff --git a/arch/m68knommu/kernel/comempci.c b/arch/m68knommu/kernel/comempci.c deleted file mode 100644 index 0a68b5a..0000000 --- a/arch/m68knommu/kernel/comempci.c +++ /dev/null @@ -1,980 +0,0 @@ -/*****************************************************************************/ - -/* - * 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/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, - resource_size_t size, resource_size_t 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); -} - -/*****************************************************************************/ - -/* - * 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); -} - -/*****************************************************************************/ |
