patch-2.4.19 linux-2.4.19/arch/mips/ddb5xxx/common/pci_auto.c

• Lines: 397
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/mips/ddb5xxx/common/pci_auto.c
• Orig date: Sun Sep 9 10:43:01 2001

diff -urN linux-2.4.18/arch/mips/ddb5xxx/common/pci_auto.c linux-2.4.19/arch/mips/ddb5xxx/common/pci_auto.c
@@ -1,396 +0,0 @@
-/*
- * arch/ppc/kernel/pci_auto.c
- * 
- * PCI autoconfiguration library
- *
- * Author: Matt Porter <mporter@mvista.com>
- *
- * Copyright 2000, 2001 MontaVista Software Inc.
- *
- * 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.
- */
-
-/*
- * Modified for MIPS by Jun Sun, jsun@mvista.com
- *
- * . Simplify the interface between pci_auto and the rest: a single function.
- * . Assign resources from low address to upper address.
- * . change most int to u32.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-
-#include <asm/ddb5xxx/pci.h>
-#include <asm/ddb5xxx/debug.h>
-
-#define	DEBUG
-#ifdef 	DEBUG
-#define	DBG(x...)	printk(x)
-#else
-#define	DBG(x...)	
-#endif
-
-/* These are used for config access before all the PCI probing
-   has been done. */
-int early_read_config_byte(struct pci_channel *hose, int bus, int dev_fn, int where, u8 *val);
-int early_read_config_word(struct pci_channel *hose, int bus, int dev_fn, int where, u16 *val);
-int early_read_config_dword(struct pci_channel *hose, int bus, int dev_fn, int where, u32 *val);
-int early_write_config_byte(struct pci_channel *hose, int bus, int dev_fn, int where, u8 val);
-int early_write_config_word(struct pci_channel *hose, int bus, int dev_fn, int where, u16 val);
-int early_write_config_dword(struct pci_channel *hose, int bus, int dev_fn, int where, u32 val);
-
-static u32 pciauto_lower_iospc;
-static u32 pciauto_upper_iospc;
-
-static u32 pciauto_lower_memspc;
-static u32 pciauto_upper_memspc;
-
-void __init 
-pciauto_setup_bars(struct pci_channel *hose,
-		   int current_bus,
-		   int pci_devfn)
-{
-	u32 bar_response, bar_size, bar_value;
-	u32 bar, addr_mask, bar_nr = 0;
-	u32 * upper_limit;
-	u32 * lower_limit;
-	int found_mem64 = 0;
-
-	DBG("PCI Autoconfig: Found Bus %d, Device %d, Function %d\n",
-	    current_bus, PCI_SLOT(pci_devfn), PCI_FUNC(pci_devfn) );
-
-	for (bar = PCI_BASE_ADDRESS_0; bar <= PCI_BASE_ADDRESS_5; bar+=4)
-	{
-		/* Tickle the BAR and get the response */
-		early_write_config_dword(hose,
-					 current_bus,
-					 pci_devfn,
-					 bar,
-					 0xffffffff);
-		early_read_config_dword(hose,
-					current_bus,
-					pci_devfn,
-					bar,
-					&bar_response);
-
-		/* If BAR is not implemented go to the next BAR */
-		if (!bar_response)
-			continue;
-
-		/* Check the BAR type and set our address mask */
-		if (bar_response & PCI_BASE_ADDRESS_SPACE)
-		{
-			addr_mask = PCI_BASE_ADDRESS_IO_MASK;
-			upper_limit = &pciauto_upper_iospc;
-			lower_limit = &pciauto_lower_iospc;
-			DBG("PCI Autoconfig: BAR %d, I/O, ", bar_nr);
-		}
-		else
-		{
-			if ( (bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
-			     PCI_BASE_ADDRESS_MEM_TYPE_64)
-				found_mem64 = 1;
-
-			addr_mask = PCI_BASE_ADDRESS_MEM_MASK;		
-			upper_limit = &pciauto_upper_memspc;
-			lower_limit = &pciauto_lower_memspc;
-			DBG("PCI Autoconfig: BAR %d, Mem, ", bar_nr);
-		}
-
-		/* Calculate requested size */
-		bar_size = ~(bar_response & addr_mask) + 1;
-
-		/* Allocate a base address */
-		bar_value = ((*lower_limit - 1) & ~(bar_size - 1)) + bar_size;
-		MIPS_ASSERT(bar_value + bar_size <= *upper_limit);
-
-		/* Write it out and update our limit */
-		early_write_config_dword(hose,
-					 current_bus,
-					 pci_devfn,
-					 bar,
-					 bar_value);
-
-		*lower_limit = bar_value + bar_size;
-
-		/*
-		 * If we are a 64-bit decoder then increment to the
-		 * upper 32 bits of the bar and force it to locate
-		 * in the lower 4GB of memory.
-		 */ 
-		if (found_mem64)
-		{
-			bar += 4;
-			early_write_config_dword(hose,
-						 current_bus,
-						 pci_devfn,
-						 bar,
-						 0x00000000);
-		}
-
-		bar_nr++;
-
-		DBG("size=0x%x, address=0x%x\n",
-		    bar_size, bar_value);
-	}
-
-}
-
-void __init
-pciauto_prescan_setup_bridge(struct pci_channel *hose,
-			     int current_bus,
-			     int pci_devfn,
-			     int sub_bus)
-{
-	int cmdstat;
-
-	/* Configure bus number registers */
-	early_write_config_byte(hose,
-				current_bus,
-				pci_devfn,
-				PCI_PRIMARY_BUS,
-				current_bus);
-	early_write_config_byte(hose,
-				current_bus,
-				pci_devfn,
-				PCI_SECONDARY_BUS,
-				sub_bus + 1);
-	early_write_config_byte(hose,
-				current_bus,
-				pci_devfn,
-				PCI_SUBORDINATE_BUS,
-				0xff);
-
-	/* Round memory allocator to 1MB boundary */
-	pciauto_upper_memspc &= ~(0x100000 - 1);
-
-	/* Round I/O allocator to 4KB boundary */
-	pciauto_upper_iospc &= ~(0x1000 - 1);
-
-	/* Set up memory and I/O filter limits, assume 32-bit I/O space */
-	early_write_config_word(hose,
-				current_bus,
-				pci_devfn,
-				PCI_MEMORY_LIMIT,
-				((pciauto_upper_memspc - 1) & 0xfff00000) >> 16);
-	early_write_config_byte(hose,
-				current_bus,
-				pci_devfn,
-				PCI_IO_LIMIT,
-				((pciauto_upper_iospc - 1) & 0x0000f000) >> 8);
-	early_write_config_word(hose,
-				current_bus,
-				pci_devfn,
-				PCI_IO_LIMIT_UPPER16,
-				((pciauto_upper_iospc - 1) & 0xffff0000) >> 16);
-			
-	/* We don't support prefetchable memory for now, so disable */
-	early_write_config_word(hose,
-				current_bus,
-				pci_devfn,
-				PCI_PREF_MEMORY_BASE,
-				0x1000);
-	early_write_config_word(hose,
-				current_bus,
-				pci_devfn,
-				PCI_PREF_MEMORY_LIMIT,
-				0x1000);
-
-	/* Enable memory and I/O accesses, enable bus master */
-	early_read_config_dword(hose,
-				current_bus,
-				pci_devfn,
-				PCI_COMMAND,
-				&cmdstat);
-	early_write_config_dword(hose,
-				 current_bus,
-				 pci_devfn,
-				 PCI_COMMAND,
-				 cmdstat |
-				 PCI_COMMAND_IO |
-				 PCI_COMMAND_MEMORY |
-				 PCI_COMMAND_MASTER);
-}
-
-void __init
-pciauto_postscan_setup_bridge(struct pci_channel *hose,
-			      int current_bus,
-			      int pci_devfn,
-			      int sub_bus)
-{
-	/* Configure bus number registers */
-	early_write_config_byte(hose,
-				current_bus,
-				pci_devfn,
-				PCI_SUBORDINATE_BUS,
-				sub_bus);
-
-	/* Round memory allocator to 1MB boundary */
-	pciauto_upper_memspc &= ~(0x100000 - 1);
-	early_write_config_word(hose,
-				current_bus,
-				pci_devfn,
-				PCI_MEMORY_BASE,
-				pciauto_upper_memspc >> 16);
-
-	/* Round I/O allocator to 4KB boundary */
-	pciauto_upper_iospc &= ~(0x1000 - 1);
-	early_write_config_byte(hose,
-				current_bus,
-				pci_devfn,
-				PCI_IO_BASE,
-				(pciauto_upper_iospc & 0x0000f000) >> 8);
-	early_write_config_word(hose,
-				current_bus,
-				pci_devfn,
-				PCI_IO_BASE_UPPER16,
-				pciauto_upper_iospc >> 16);
-}
-
-#define      PCIAUTO_IDE_MODE_MASK           0x05
-
-int __init
-pciauto_bus_scan(struct pci_channel *hose, int current_bus)
-{
-	int sub_bus;
-	u32 pci_devfn, pci_class, cmdstat, found_multi=0;
-	unsigned short vid;
-	unsigned char header_type;
-
-	sub_bus = current_bus;
-	
-	for (pci_devfn=0; pci_devfn<0xff; pci_devfn++) {
-
-		if (PCI_FUNC(pci_devfn) && !found_multi)
-			continue;
-
-		early_read_config_byte(hose,
-				       current_bus,
-				       pci_devfn,
-				       PCI_HEADER_TYPE,
-				       &header_type);
-
-		if (!PCI_FUNC(pci_devfn))
-			found_multi = header_type & 0x80;
-
-		early_read_config_word(hose,
-				       current_bus,
-				       pci_devfn,
-				       PCI_VENDOR_ID,
-				       &vid);
-
-		if (vid == 0xffff) continue;
-
-		early_read_config_dword(hose,
-					current_bus,
-					pci_devfn,
-					PCI_CLASS_REVISION, &pci_class);
-		if ( (pci_class >> 16) == PCI_CLASS_BRIDGE_PCI ) {
-			DBG("PCI Autoconfig: Found P2P bridge, device %d\n", PCI_SLOT(pci_devfn));
-			pciauto_prescan_setup_bridge(hose,
-						     current_bus,
-						     pci_devfn,
-						     sub_bus);
-			sub_bus = pciauto_bus_scan(hose, sub_bus+1);
-			pciauto_postscan_setup_bridge(hose,
-						      current_bus,
-						      pci_devfn,
-						      sub_bus);
-
-		} else if ((pci_class >> 16) == PCI_CLASS_STORAGE_IDE) {
-
-			unsigned char prg_iface;
-
-			early_read_config_byte(hose,
-					       current_bus,
-					       pci_devfn,
-					       PCI_CLASS_PROG,
-					       &prg_iface);
-			if (!(prg_iface & PCIAUTO_IDE_MODE_MASK)) {
-				DBG("PCI Autoconfig: Skipping legacy mode IDE controller\n");
-				continue;
-			}
-		}
-
-		/*
-		 * Found a peripheral, enable some standard
-		 * settings
-		 */
-		early_read_config_dword(hose,
-					current_bus,
-					pci_devfn,
-					PCI_COMMAND,
-					&cmdstat);
-		early_write_config_dword(hose,
-					 current_bus,
-					 pci_devfn,
-					 PCI_COMMAND,
-					 cmdstat |
-					 PCI_COMMAND_IO |
-					 PCI_COMMAND_MEMORY |
-					 PCI_COMMAND_MASTER);
-		early_write_config_byte(hose,
-					current_bus,
-					pci_devfn,
-					PCI_LATENCY_TIMER,
-					0x80);
-
-                /* Allocate PCI I/O and/or memory space */
-		pciauto_setup_bars(hose,
-				   current_bus,
-				   pci_devfn);
-	}
-	return sub_bus;
-}
-
-int __init
-pciauto_assign_resources(int busno, struct pci_channel *hose)
-{
-	/* setup resource limits */
-	pciauto_lower_iospc = hose->io_resource->start;
-	pciauto_upper_iospc = hose->io_resource->end + 1;
-	pciauto_lower_memspc = hose->mem_resource->start;
-	pciauto_upper_memspc = hose->mem_resource->end + 1;
-
-	return pciauto_bus_scan(hose, busno);
-}
-
-
-/*
- * These functions are used early on before PCI scanning is done
- * and all of the pci_dev and pci_bus structures have been created.
- */
-static struct pci_dev *
-fake_pci_dev(struct pci_channel *hose, int busnr, int devfn)
-{
-        static struct pci_dev dev;
-        static struct pci_bus bus;
-
-        dev.bus = &bus;
-        dev.sysdata = hose;
-        dev.devfn = devfn;
-        bus.number = busnr;
-        bus.ops = hose->pci_ops;
-        return &dev;
-}
-
-#define EARLY_PCI_OP(rw, size, type)                                    \
-int early_##rw##_config_##size(struct pci_channel *hose, int bus,    \
-                               int devfn, int offset, type value)       \
-{                                                                       \
-        return pci_##rw##_config_##size(fake_pci_dev(hose, bus, devfn), \
-                                        offset, value);                 \
-}
-
-EARLY_PCI_OP(read, byte, u8 *)
-EARLY_PCI_OP(read, word, u16 *)
-EARLY_PCI_OP(read, dword, u32 *)
-EARLY_PCI_OP(write, byte, u8)
-EARLY_PCI_OP(write, word, u16)
-EARLY_PCI_OP(write, dword, u32)