/* $	$Id: pci-dc.c,v 1.5 2001/08/24 12:38:19 dwmw2 Exp $ *	Dreamcast PCI: Supports SEGA Broadband Adaptor only. */#include <linux/config.h>#include <linux/sched.h>#include <linux/kernel.h>#include <linux/param.h>#include <linux/interrupt.h>#include <linux/init.h>#include <linux/irq.h>#include <linux/pci.h>#include <asm/io.h>#include <asm/irq.h>#include <asm/dc_sysasic.h>#define	GAPSPCI_REGS		0x01001400#define GAPSPCI_DMA_BASE	0x01840000#define GAPSPCI_DMA_SIZE	32768#define GAPSPCI_BBA_CONFIG	0x01001600#define	GAPSPCI_IRQ		HW_EVENT_EXTERNALstatic int gapspci_dma_used;static struct pci_bus *pci_root_bus;struct pci_fixup pcibios_fixups[] = {	{0, 0, 0, NULL}};#define BBA_SELECTED(dev) (dev->bus->number==0 && dev->devfn==0)static int gapspci_read_config_byte(struct pci_dev *dev, int where,                                    u8 * val){	if (BBA_SELECTED(dev))		*val = inb(GAPSPCI_BBA_CONFIG+where);	else                *val = 0xff;	return PCIBIOS_SUCCESSFUL;}static int gapspci_read_config_word(struct pci_dev *dev, int where,                                    u16 * val){        if (BBA_SELECTED(dev))		*val = inw(GAPSPCI_BBA_CONFIG+where);	else                *val = 0xffff;        return PCIBIOS_SUCCESSFUL;}static int gapspci_read_config_dword(struct pci_dev *dev, int where,                                     u32 * val){        if (BBA_SELECTED(dev))		*val = inl(GAPSPCI_BBA_CONFIG+where);	else                *val = 0xffffffff;        return PCIBIOS_SUCCESSFUL;}static int gapspci_write_config_byte(struct pci_dev *dev, int where,                                     u8 val){        if (BBA_SELECTED(dev))		outb(val, GAPSPCI_BBA_CONFIG+where);        return PCIBIOS_SUCCESSFUL;}static int gapspci_write_config_word(struct pci_dev *dev, int where,                                     u16 val){        if (BBA_SELECTED(dev))		outw(val, GAPSPCI_BBA_CONFIG+where);        return PCIBIOS_SUCCESSFUL;}static int gapspci_write_config_dword(struct pci_dev *dev, int where,                                      u32 val){        if (BBA_SELECTED(dev))		outl(val, GAPSPCI_BBA_CONFIG+where);        return PCIBIOS_SUCCESSFUL;}static struct pci_ops pci_config_ops = {        gapspci_read_config_byte,        gapspci_read_config_word,        gapspci_read_config_dword,        gapspci_write_config_byte,        gapspci_write_config_word,        gapspci_write_config_dword};void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,			   dma_addr_t * dma_handle){	unsigned long buf;	if (gapspci_dma_used+size > GAPSPCI_DMA_SIZE)		return NULL;	buf = GAPSPCI_DMA_BASE+gapspci_dma_used;	gapspci_dma_used = PAGE_ALIGN(gapspci_dma_used+size);		printk("pci_alloc_consistent: %ld bytes at 0x%lx\n", (long)size, buf);	*dma_handle = (dma_addr_t)buf;	return (void *)P2SEGADDR(buf);}void pci_free_consistent(struct pci_dev *hwdev, size_t size,			 void *vaddr, dma_addr_t dma_handle){	/* XXX */	gapspci_dma_used = 0;}void __init pcibios_fixup_pbus_ranges(struct pci_bus *bus, struct pbus_set_ranges_data *ranges){}                                                                                void __init pcibios_fixup_bus(struct pci_bus *bus){	struct list_head *ln;	struct pci_dev *dev;	for (ln=bus->devices.next; ln != &bus->devices; ln=ln->next) {		dev = pci_dev_b(ln);		if (!BBA_SELECTED(dev)) continue;		printk("PCI: MMIO fixup to %s\n", dev->name);		dev->resource[1].start=0x01001700;		dev->resource[1].end=0x010017ff;	}}static u8 __init no_swizzle(struct pci_dev *dev, u8 * pin){	return PCI_SLOT(dev->devfn);}static int __init map_dc_irq(struct pci_dev *dev, u8 slot, u8 pin){	return GAPSPCI_IRQ;}void __init pcibios_init(void){	pci_root_bus = pci_scan_bus(0, &pci_config_ops, NULL);	/* pci_assign_unassigned_resources(); */	pci_fixup_irqs(no_swizzle, map_dc_irq);}/* Haven't done anything here as yet */char * __init pcibios_setup(char *str){	return str;}int __init gapspci_init(void){	int i;	char idbuf[16];	for(i=0; i<16; i++)		idbuf[i]=inb(GAPSPCI_REGS+i);	if(strncmp(idbuf, "GAPSPCI_BRIDGE_2", 16))		return -1;	outl(0x5a14a501, GAPSPCI_REGS+0x18);	for(i=0; i<1000000; i++);	if(inl(GAPSPCI_REGS+0x18)!=1)		return -1;	outl(0x01000000, GAPSPCI_REGS+0x20);	outl(0x01000000, GAPSPCI_REGS+0x24);	outl(GAPSPCI_DMA_BASE, GAPSPCI_REGS+0x28);	outl(GAPSPCI_DMA_BASE+GAPSPCI_DMA_SIZE, GAPSPCI_REGS+0x2c);	outl(1, GAPSPCI_REGS+0x14);	outl(1, GAPSPCI_REGS+0x34);	gapspci_dma_used=0;	/* Setting Broadband Adapter */	outw(0xf900, GAPSPCI_BBA_CONFIG+0x06);	outl(0x00000000, GAPSPCI_BBA_CONFIG+0x30);	outb(0x00, GAPSPCI_BBA_CONFIG+0x3c);	outb(0xf0, GAPSPCI_BBA_CONFIG+0x0d);	outw(0x0006, GAPSPCI_BBA_CONFIG+0x04);	outl(0x00002001, GAPSPCI_BBA_CONFIG+0x10);	outl(0x01000000, GAPSPCI_BBA_CONFIG+0x14);	return 0;}