patch-2.1.97 linux/arch/ppc/kernel/pci-bridge.c

• Lines: 429
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.96/linux/arch/ppc/kernel/pci-bridge.c
• Orig date: Sat Aug 16 09:51:08 1997

diff -u --recursive --new-file v2.1.96/linux/arch/ppc/kernel/pci-bridge.c linux/arch/ppc/kernel/pci-bridge.c
@@ -1,428 +0,0 @@
-/*
- * Support for PCI bridges found on Power Macintoshes.
- * At present the "bandit" and "chaos" bridges are supported.
- * Fortunately you access configuration space in the same
- * way with either bridge.
- *
- * Copyright (C) 1997 Paul Mackerras (paulus@cs.anu.edu.au)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/bios32.h>
-#include <linux/delay.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/pci-bridge.h>
-
-struct bridge_data {
-	volatile unsigned int *cfg_addr;
-	volatile unsigned char *cfg_data;
-	void *io_base;
-	int bus_number;
-	int max_bus;
-	struct bridge_data *next;
-	struct device_node *node;
-};
-
-static struct bridge_data **bridges, *bridge_list;
-static int max_bus;
-
-static void add_bridges(struct device_node *dev, unsigned long *mem_ptr);
-
-/*
- * Magic constants for enabling cache coherency in the bandit/PSX bridge.
- */
-#define APPLE_VENDID	0x106b
-#define BANDIT_DEVID	1
-#define BANDIT_REVID	3
-
-#define BANDIT_DEVNUM	11
-#define BANDIT_MAGIC	0x50
-#define BANDIT_COHERENT	0x40
-
-/*
- * For a bandit bridge, turn on cache coherency if necessary.
- * N.B. we can't use pcibios_*_config_* here because bridges[]
- * is not initialized yet.
- */
-static void init_bandit(struct bridge_data *bp)
-{
-	unsigned int vendev, magic;
-	int rev;
-
-	/* read the word at offset 0 in config space for device 11 */
-	out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_VENDOR_ID);
-	udelay(2);
-	vendev = in_le32((volatile unsigned int *)bp->cfg_data);
-	if (vendev != (BANDIT_DEVID << 16) + APPLE_VENDID) {
-		printk(KERN_WARNING "bandit isn't? (%x)\n", vendev);
-		return;
-	}
-
-	/* read the revision id */
-	out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_REVISION_ID);
-	udelay(2);
-	rev = in_8(bp->cfg_data);
-	if (rev != BANDIT_REVID)
-		printk(KERN_WARNING "Unknown revision %d for bandit at %p\n",
-		       rev, bp->io_base);
-
-	/* read the word at offset 0x50 */
-	out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + BANDIT_MAGIC);
-	udelay(2);
-	magic = in_le32((volatile unsigned int *)bp->cfg_data);
-	if ((magic & BANDIT_COHERENT) != 0)
-		return;
-	magic |= BANDIT_COHERENT;
-	udelay(2);
-	out_le32((volatile unsigned int *)bp->cfg_data, magic);
-	printk(KERN_INFO "Cache coherency enabled for bandit/PSX at %p\n",
-	       bp->io_base);
-}
-
-unsigned long pmac_find_bridges(unsigned long mem_start, unsigned long mem_end)
-{
-	int bus;
-	struct bridge_data *bridge;
-
-	bridge_list = 0;
-	max_bus = 0;
-	add_bridges(find_devices("bandit"), &mem_start);
-	add_bridges(find_devices("chaos"), &mem_start);
-	bridges = (struct bridge_data **) mem_start;
-	mem_start += (max_bus + 1) * sizeof(struct bridge_data *);
-	memset(bridges, 0, (max_bus + 1) * sizeof(struct bridge_data *));
-	for (bridge = bridge_list; bridge != NULL; bridge = bridge->next)
-		for (bus = bridge->bus_number; bus <= bridge->max_bus; ++bus)
-			bridges[bus] = bridge;
-
-	return mem_start;
-}
-
-static void add_bridges(struct device_node *dev, unsigned long *mem_ptr)
-{
-	int *bus_range;
-	int len;
-	struct bridge_data *bp;
-
-	for (; dev != NULL; dev = dev->next) {
-		if (dev->n_addrs < 1) {
-			printk(KERN_WARNING "Can't use %s: no address\n",
-			       dev->full_name);
-			continue;
-		}
-		bus_range = (int *) get_property(dev, "bus-range", &len);
-		if (bus_range == NULL || len < 2 * sizeof(int)) {
-			printk(KERN_WARNING "Can't get bus-range for %s\n",
-			       dev->full_name);
-			continue;
-		}
-		if (bus_range[1] == bus_range[0])
-			printk(KERN_INFO "PCI bus %d", bus_range[0]);
-		else
-			printk(KERN_INFO "PCI buses %d..%d", bus_range[0],
-			       bus_range[1]);
-		printk(" controlled by %s at %x\n",
-		       dev->name, dev->addrs[0].address);
-		bp = (struct bridge_data *) *mem_ptr;
-		*mem_ptr += sizeof(struct bridge_data);
-		bp->cfg_addr = (volatile unsigned int *)
-			(dev->addrs[0].address + 0x800000);
-		bp->cfg_data = (volatile unsigned char *)
-			(dev->addrs[0].address + 0xc00000);
-		bp->io_base = (void *) dev->addrs[0].address;
-		ioremap(dev->addrs[0].address, 0x800000);
-		bp->bus_number = bus_range[0];
-		bp->max_bus = bus_range[1];
-		bp->next = bridge_list;
-		bp->node = dev;
-		bridge_list = bp;
-		if (bp->max_bus > max_bus)
-			max_bus = bp->max_bus;
-
-		if (strcmp(dev->name, "bandit") == 0)
-			init_bandit(bp);
-	}
-}
-
-void *pci_io_base(unsigned int bus)
-{
-	struct bridge_data *bp;
-
-	if (bus > max_bus || (bp = bridges[bus]) == 0)
-		return 0;
-	return bp->io_base;
-}
-
-int pci_device_loc(struct device_node *dev, unsigned char *bus_ptr,
-		   unsigned char *devfn_ptr)
-{
-	unsigned int *reg;
-	int len;
-
-	reg = (unsigned int *) get_property(dev, "reg", &len);
-	if (reg == 0 || len < 5 * sizeof(unsigned int)) {
-		/* doesn't look like a PCI device */
-		*bus_ptr = 0xff;
-		*devfn_ptr = 0xff;
-		return -1;
-	}
-	*bus_ptr = reg[0] >> 16;
-	*devfn_ptr = reg[0] >> 8;
-	return 0;
-}
-
-int pmac_pcibios_read_config_byte(unsigned char bus, unsigned char dev_fn,
-				  unsigned char offset, unsigned char *val)
-{
-	struct bridge_data *bp;
-
-	*val = 0xff;
-	if (bus > max_bus || (bp = bridges[bus]) == 0)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	if (bus == bp->bus_number) {
-		if (dev_fn < (11 << 3))
-			return PCIBIOS_DEVICE_NOT_FOUND;
-		out_le32(bp->cfg_addr,
-			 (1UL << (dev_fn >> 3)) + ((dev_fn & 7) << 8)
-			 + (offset & ~3));
-	} else {
-		out_le32(bp->cfg_addr, (dev_fn << 8) + (offset & ~3) + 1);
-	}
-	udelay(2);
-	*val = in_8(bp->cfg_data + (offset & 3));
-
-	if (offset == PCI_INTERRUPT_LINE) {
-		/*
-		 * Open Firmware often doesn't initialize this
-		 * register properly, so we find the node and see
-		 * if it has an AAPL,interrupts property.
-		 */
-		struct device_node *node;
-		unsigned int *reg;
-
-		for (node = bp->node->child; node != 0; node = node->sibling) {
-			reg = (unsigned int *) get_property(node, "reg", 0);
-			if (reg == 0 || ((reg[0] >> 8) & 0xff) != dev_fn)
-				continue;
-			/* this is the node, see if it has interrupts */
-			if (node->n_intrs > 0)
-				*val = node->intrs[0];
-			break;
-		}
-	}
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-int pmac_pcibios_read_config_word(unsigned char bus, unsigned char dev_fn,
-				  unsigned char offset, unsigned short *val)
-{
-	struct bridge_data *bp;
-
-	*val = 0xffff;
-	if (bus > max_bus || (bp = bridges[bus]) == 0 || (offset & 1) != 0)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	if (bus == bp->bus_number) {
-		if (dev_fn < (11 << 3))
-			return PCIBIOS_DEVICE_NOT_FOUND;
-		out_le32(bp->cfg_addr,
-			 (1UL << (dev_fn >> 3)) + ((dev_fn & 7) << 8)
-			 + (offset & ~3));
-	} else {
-		out_le32(bp->cfg_addr, (dev_fn << 8) + (offset & ~3) + 1);
-	}
-	udelay(2);
-	*val = in_le16((volatile unsigned short *)(bp->cfg_data + (offset & 3)));
-	return PCIBIOS_SUCCESSFUL;
-}
-
-int pmac_pcibios_read_config_dword(unsigned char bus, unsigned char dev_fn,
-				   unsigned char offset, unsigned int *val)
-{
-	struct bridge_data *bp;
-
-	*val = 0xffffffff;
-	if (bus > max_bus || (bp = bridges[bus]) == 0 || (offset & 3) != 0)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	if (bus == bp->bus_number) {
-		if (dev_fn < (11 << 3))
-			return PCIBIOS_DEVICE_NOT_FOUND;
-		out_le32(bp->cfg_addr,
-			 (1UL << (dev_fn >> 3)) + ((dev_fn & 7) << 8)
-			 + offset);
-	} else {
-		out_le32(bp->cfg_addr, (dev_fn << 8) + offset + 1);
-	}
-	udelay(2);
-	*val = in_le32((volatile unsigned int *)bp->cfg_data);
-	return PCIBIOS_SUCCESSFUL;
-}
-
-int pmac_pcibios_write_config_byte(unsigned char bus, unsigned char dev_fn,
-				   unsigned char offset, unsigned char val)
-{
-	struct bridge_data *bp;
-
-	if (bus > max_bus || (bp = bridges[bus]) == 0)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	if (bus == bp->bus_number) {
-		if (dev_fn < (11 << 3))
-			return PCIBIOS_DEVICE_NOT_FOUND;
-		out_le32(bp->cfg_addr,
-			 (1UL << (dev_fn >> 3)) + ((dev_fn & 7) << 8)
-			 + (offset & ~3));
-	} else {
-		out_le32(bp->cfg_addr, (dev_fn << 8) + (offset & ~3) + 1);
-	}
-	udelay(2);
-	out_8(bp->cfg_data + (offset & 3), val);
-	return PCIBIOS_SUCCESSFUL;
-}
-
-int pmac_pcibios_write_config_word(unsigned char bus, unsigned char dev_fn,
-				   unsigned char offset, unsigned short val)
-{
-	struct bridge_data *bp;
-
-	if (bus > max_bus || (bp = bridges[bus]) == 0 || (offset & 1) != 0)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	if (bus == bp->bus_number) {
-		if (dev_fn < (11 << 3))
-			return PCIBIOS_DEVICE_NOT_FOUND;
-		out_le32(bp->cfg_addr,
-			 (1UL << (dev_fn >> 3)) + ((dev_fn & 7) << 8)
-			 + (offset & ~3));
-	} else {
-		out_le32(bp->cfg_addr, (dev_fn << 8) + (offset & ~3) + 1);
-	}
-	udelay(2);
-	out_le16((volatile unsigned short *)(bp->cfg_data + (offset & 3)), val);
-	return PCIBIOS_SUCCESSFUL;
-}
-
-int pmac_pcibios_write_config_dword(unsigned char bus, unsigned char dev_fn,
-				    unsigned char offset, unsigned int val)
-{
-	struct bridge_data *bp;
-
-	if (bus > max_bus || (bp = bridges[bus]) == 0 || (offset & 3) != 0)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	if (bus == bp->bus_number) {
-		if (dev_fn < (11 << 3))
-			return PCIBIOS_DEVICE_NOT_FOUND;
-		out_le32(bp->cfg_addr,
-			 (1UL << (dev_fn >> 3)) + ((dev_fn & 7) << 8)
-			 + offset);
-	} else {
-		out_le32(bp->cfg_addr, (dev_fn << 8) + offset + 1);
-	}
-	udelay(2);
-	out_le32((volatile unsigned int *)bp->cfg_data, val);
-	return PCIBIOS_SUCCESSFUL;
-}
-
-int pmac_pcibios_find_device(unsigned short vendor, unsigned short dev_id,
-			     unsigned short index, unsigned char *bus_ptr,
-			     unsigned char *dev_fn_ptr)
-{
-	int bus, unit, fn, num, devfn;
-	unsigned int x, vendev;
-	unsigned char h;
-
-	if (vendor == 0xffff)
-		return PCIBIOS_BAD_VENDOR_ID;
-	vendev = (dev_id << 16) + vendor;
-	num = 0;
-	for (bus = 0; bus <= max_bus; ++bus) {
-		if (bridges[bus] == 0)
-			continue;
-		unit = fn = 0;
-		if (bus == bridges[bus]->bus_number)
-			unit = 11;
-		while (unit < 32) {
-			devfn = PCI_DEVFN(unit, fn);
-			if (pcibios_read_config_dword(bus, devfn,
-						      PCI_VENDOR_ID, &x)
-			    == PCIBIOS_SUCCESSFUL && x == vendev) {
-				if (index == num) {
-					*bus_ptr = bus;
-					*dev_fn_ptr = devfn;
-					return PCIBIOS_SUCCESSFUL;
-				}
-				++num;
-			}
-			if (fn != 0) {
-				if (++fn >= 8) {
-					++unit;
-					fn = 0;
-				}
-				continue;
-			}
-			if (pcibios_read_config_byte(bus, devfn,
-						     PCI_HEADER_TYPE, &h)
-			    == PCIBIOS_SUCCESSFUL && (h & 0x80) != 0)
-				++fn;
-			else
-				++unit;
-		}
-	}
-	return PCIBIOS_DEVICE_NOT_FOUND;
-}
-
-int pmac_pcibios_find_class(unsigned int class_code, unsigned short index,
-			    unsigned char *bus_ptr, unsigned char *dev_fn_ptr)
-{
-	int bus, unit, fn, num, devfn;
-	unsigned int x;
-	unsigned char h;
-
-	num = 0;
-	for (bus = 0; bus <= max_bus; ++bus) {
-		if (bridges[bus] == 0)
-			continue;
-		unit = fn = 0;
-		if (bus == bridges[bus]->bus_number)
-			unit = 11;
-		while (unit < 32) {
-			devfn = PCI_DEVFN(unit, fn);
-			if (pcibios_read_config_dword(bus, devfn,
-						      PCI_CLASS_REVISION, &x)
-			    == PCIBIOS_SUCCESSFUL && (x >> 8) == class_code) {
-				if (index == num) {
-					*bus_ptr = bus;
-					*dev_fn_ptr = devfn;
-					return PCIBIOS_SUCCESSFUL;
-				}
-				++num;
-			}
-			if (fn != 0) {
-				if (++fn >= 8) {
-					++unit;
-					fn = 0;
-				}
-				continue;
-			}
-			if (pcibios_read_config_byte(bus, devfn,
-						     PCI_HEADER_TYPE, &h)
-			    == PCIBIOS_SUCCESSFUL && (h & 0x80) != 0)
-				++fn;
-			else
-				++unit;
-		}
-	}
-	return PCIBIOS_DEVICE_NOT_FOUND;
-}
-
-__initfunc(unsigned long route_pci_interrupts(void))
-{
-	return 0;
-}