patch-2.4.6 linux/arch/sh/kernel/pci-dc.c

• Lines: 277
• Date: Wed Jun 27 13:55:29 2001
• Orig file: v2.4.5/linux/arch/sh/kernel/pci-dc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/arch/sh/kernel/pci-dc.c linux/arch/sh/kernel/pci-dc.c
@@ -0,0 +1,276 @@
+/*
+ $	$Id: pci-dc.c,v 1.2 2001/05/24 05:09:16 mrbrown 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_EXTERNAL
+
+static 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 pcibios_align_resource(void *data, struct resource *res,
+			    unsigned long size)
+{
+}
+
+
+void __init pcibios_update_irq(struct pci_dev *dev, int irq)
+{
+}
+
+
+void __init pcibios_update_resource(struct pci_dev *dev, struct resource *root,
+			     struct resource *res, int resource)
+{
+}
+
+
+void pcibios_set_master(struct pci_dev *dev)
+{
+	/* No special bus mastering setup handling */
+}
+
+
+int pcibios_enable_device(struct pci_dev *dev)
+{
+
+	u16 cmd, old_cmd;
+	int idx;
+	struct resource *r;
+
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	old_cmd = cmd;
+	for (idx = 0; idx < 6; idx++) {
+		r = dev->resource + idx;
+		if (!r->start && r->end) {
+			printk(KERN_ERR
+			       "PCI: Device %s not available because"
+			       " of resource collisions\n",
+			       dev->slot_name);
+			return -EINVAL;
+		}
+		if (r->flags & IORESOURCE_IO)
+			cmd |= PCI_COMMAND_IO;
+		if (r->flags & IORESOURCE_MEM)
+			cmd |= PCI_COMMAND_MEMORY;
+	}
+	if (cmd != old_cmd) {
+		printk("PCI: enabling device %s (%04x -> %04x)\n",
+		       dev->slot_name, old_cmd, cmd);
+		pci_write_config_word(dev, PCI_COMMAND, cmd);
+	}
+	return 0;
+
+}
+
+
+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%p\n", 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 */
+}
+
+
+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;
+}