patch-2.4.4 linux/arch/sh/kernel/setup_dc.c

• Lines: 361
• Date: Wed Apr 11 21:24:52 2001
• Orig file: v2.4.3/linux/arch/sh/kernel/setup_dc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/arch/sh/kernel/setup_dc.c linux/arch/sh/kernel/setup_dc.c
@@ -0,0 +1,360 @@
+/*
+ *	$Id: setup_dc.c,v 1.1 2001/04/01 15:02:00 yaegashi Exp $
+ *	SEGA Dreamcast support
+ */
+
+#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>
+
+#define	GAPSPCI_REGS		0x01001400
+#define GAPSPCI_DMA_BASE	0x01840000
+#define GAPSPCI_DMA_SIZE	32768
+#define GAPSPCI_BBA_CONFIG	0x01001600
+
+#define	GAPSPCI_IRQ		11
+#define	GAPSPCI_INTC		0x005f6924
+
+static int gapspci_dma_used;
+
+static struct pci_bus *pci_root_bus;
+
+static void disable_gapspci_irq(unsigned int irq)
+{
+	unsigned long flags;
+	unsigned long intc;
+
+	save_and_cli(flags);
+	intc = inl(GAPSPCI_INTC);
+	intc &= ~(1<<3);
+	outl(intc, GAPSPCI_INTC);
+	restore_flags(flags);
+}
+
+
+static void enable_gapspci_irq(unsigned int irq)
+{
+	unsigned long flags;
+	unsigned long intc;
+
+	save_and_cli(flags);
+	intc = inl(GAPSPCI_INTC);
+	intc |= (1<<3);
+	outl(intc, GAPSPCI_INTC);
+	restore_flags(flags);
+}
+
+
+static void mask_and_ack_gapspci_irq(unsigned int irq)
+{
+	unsigned long flags;
+	unsigned long intc;
+
+	save_and_cli(flags);
+	intc = inl(GAPSPCI_INTC);
+	intc &= ~(1<<3);
+	outl(intc, GAPSPCI_INTC);
+	restore_flags(flags);
+}
+
+
+static void end_gapspci_irq(unsigned int irq)
+{
+	enable_gapspci_irq(irq);
+}
+
+
+static unsigned int startup_gapspci_irq(unsigned int irq)
+{ 
+	enable_gapspci_irq(irq);
+	return 0;
+}
+
+
+static void shutdown_gapspci_irq(unsigned int irq)
+{
+	disable_gapspci_irq(irq);
+}
+
+
+static struct hw_interrupt_type gapspci_irq_type = {
+	"GAPSPCI-IRQ",
+	startup_gapspci_irq,
+	shutdown_gapspci_irq,
+	enable_gapspci_irq,
+	disable_gapspci_irq,
+	mask_and_ack_gapspci_irq,
+	end_gapspci_irq
+};
+
+
+static u8 __init no_swizzle(struct pci_dev *dev, u8 * pin)
+{
+	return PCI_SLOT(dev->devfn);
+}
+
+static int __init map_od_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+	return GAPSPCI_IRQ;
+}
+
+int __init setup_dreamcast(void)
+{
+	gapspci_init();
+
+	printk(KERN_INFO "SEGA Dreamcast support.\n");
+#if 0
+	printk(KERN_INFO "BCR1: 0x%08x\n", ctrl_inl(0xff800000));
+	printk(KERN_INFO "BCR2: 0x%08x\n", ctrl_inw(0xff800004));
+	printk(KERN_INFO "WCR1: 0x%08x\n", ctrl_inl(0xff800008));
+	printk(KERN_INFO "WCR2: 0x%08x\n", ctrl_inl(0xff80000c));
+	printk(KERN_INFO "WCR3: 0x%08x\n", ctrl_inl(0xff800010));
+	printk(KERN_INFO "MCR: 0x%08x\n", ctrl_inl(0xff800014));
+	printk(KERN_INFO "PCR: 0x%08x\n", ctrl_inw(0xff800018));
+/*
+ *	BCR1: 0xa3020008
+ *	BCR2: 0x0001
+ *	WCR1: 0x01110111
+ *	WCR2: 0x618066d8
+ *	WCR3: 0x07777777
+ *	MCR: 0xc00a0e24
+ *	PCR: 0x0000
+ */
+#endif
+	return 0;
+}
+
+
+/*
+ *	Dreamcast PCI: Supports SEGA Broadband Adaptor only.
+ */
+
+#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)
+{
+}
+
+
+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: %d bytes at 0x%08x\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)
+{
+}
+
+
+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;
+	}
+}
+
+
+void __init dreamcast_pcibios_init(void)
+{
+	pci_root_bus = pci_scan_bus(0, &pci_config_ops, NULL);
+	/* pci_assign_unassigned_resources(); */
+	pci_fixup_irqs(no_swizzle, map_od_irq);
+}
+
+
+static __init int 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;
+
+	/*  */
+	irq_desc[GAPSPCI_IRQ].handler = &gapspci_irq_type;
+
+	/* 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;
+}