path: root/recipes/linux/linux-efika-2.6.20/0026-POWERPC-Cleanup-mpc52xx-PCI-support.txt

From 78aaa3476bf62a50d85a9753bf1ef82fd296ca73 Mon Sep 17 00:00:00 2001
From: Grant Likely <grant.likely@secretlab.ca>
Date: Mon, 11 Dec 2006 22:41:49 -0700
Subject: [PATCH] [POWERPC] Cleanup mpc52xx PCI support

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---
 arch/powerpc/Kconfig                      |   17 ++-
 arch/powerpc/platforms/52xx/mpc52xx_pci.c |  334 ------------------------
 arch/powerpc/platforms/52xx/mpc52xx_pci.h |  104 --------
 arch/powerpc/platforms/52xx/pci.c         |  404 +++++++++++++++++++++++++++++
 4 files changed, 420 insertions(+), 439 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 23d7d73..ec17225 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -429,6 +429,21 @@ config PPC_MPC52xx
 	bool
 	default n
 
+config PPC_MPC5200
+	bool
+	select PPC_MPC52xx
+	default n
+
+config PPC_MPC5200_BUGFIX
+	bool "MPC5200 (L25R) bugfix support"
+	depends on PPC_MPC5200
+	default n
+	help
+	  Enable workarounds for original MPC5200 errata.  This is not required
+	  for MPC5200B based boards.
+
+	  It is safe to say 'Y' here
+
 config PPC_BESTCOMM
 	bool
 	depends on PPC_MPC52xx
@@ -446,7 +461,7 @@ config PPC_EFIKA
 config PPC_LITE5200
 	bool "Freescale Lite5200 Eval Board"
 	depends on PPC_MULTIPLATFORM && PPC32
-	select PPC_MPC52xx
+	select PPC_MPC5200
 	default n
 
 config PPC_PMAC
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pci.c b/arch/powerpc/platforms/52xx/mpc52xx_pci.c
deleted file mode 100644
index 07dce3c..0000000
--- a/arch/powerpc/platforms/52xx/mpc52xx_pci.c
+++ /dev/null
@@ -1,334 +0,0 @@
-/*
- * PCI code for the Freescale MPC52xx embedded CPU.
- *
- * Copyright (C) 2004 Secret Lab Technologies Ltd.
- *                        Grant Likely <grant.likely@secretlab.ca>
- * Copyright (C) 2004 Sylvain Munaut <tnt@246tNt.com>
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2. This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- */
-
-#define DEBUG
-
-#include <asm/pci.h>
-#include <asm/mpc52xx.h>
-#include "mpc52xx_pci.h"
-#include <asm/delay.h>
-#include <asm/machdep.h>
-#include <linux/kernel.h>
-
-
-/* This macro is defined to activate the workaround for the bug
-   435 of the MPC5200 (L25R). With it activated, we don't do any
-   32 bits configuration access during type-1 cycles */
-#define MPC5200_BUG_435_WORKAROUND
-
-
-static int
-mpc52xx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
-				int offset, int len, u32 *val)
-{
-	struct pci_controller *hose = bus->sysdata;
-	u32 value;
-
-	if (ppc_md.pci_exclude_device)
-		if (ppc_md.pci_exclude_device(bus->number, devfn))
-			return PCIBIOS_DEVICE_NOT_FOUND;
-
-	out_be32(hose->cfg_addr,
-		(1 << 31) |
-		((bus->number - hose->bus_offset) << 16) |
-		(devfn << 8) |
-		(offset & 0xfc));
-	mb();
-
-#ifdef MPC5200_BUG_435_WORKAROUND
-	if (bus->number != hose->bus_offset) {
-		switch (len) {
-		      case 1:
-			value = in_8(((u8 __iomem *)hose->cfg_data) +
-			             (offset & 3));
-			break;
-		      case 2:
-			value = in_le16(((u16 __iomem *)hose->cfg_data) +
-			                ((offset>>1) & 1));
-			break;
-
-		      default:
-			value = in_le16((u16 __iomem *)hose->cfg_data) |
-				(in_le16(((u16 __iomem *)hose->cfg_data) + 1) << 16);
-			break;
-		}
-	}
-	else
-#endif
-	{
-		value = in_le32(hose->cfg_data);
-
-		if (len != 4) {
-			value >>= ((offset & 0x3) << 3);
-			value &= 0xffffffff >> (32 - (len << 3));
-		}
-	}
-
-	*val = value;
-
-	out_be32(hose->cfg_addr, 0);
-	mb();
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int
-mpc52xx_pci_write_config(struct pci_bus *bus, unsigned int devfn,
-				int offset, int len, u32 val)
-{
-	struct pci_controller *hose = bus->sysdata;
-	u32 value, mask;
-
-	if (ppc_md.pci_exclude_device)
-		if (ppc_md.pci_exclude_device(bus->number, devfn))
-			return PCIBIOS_DEVICE_NOT_FOUND;
-
-	out_be32(hose->cfg_addr,
-		(1 << 31) |
-		((bus->number - hose->bus_offset) << 16) |
-		(devfn << 8) |
-		(offset & 0xfc));
-	mb();
-
-#ifdef MPC5200_BUG_435_WORKAROUND
-	if (bus->number != hose->bus_offset) {
-		switch (len) {
-		      case 1:
-			out_8(((u8 __iomem *)hose->cfg_data) +
-				(offset & 3), val);
-			break;
-		      case 2:
-			out_le16(((u16 __iomem *)hose->cfg_data) +
-				((offset>>1) & 1), val);
-			break;
-
-		      default:
-			out_le16((u16 __iomem *)hose->cfg_data,
-				(u16)val);
-			out_le16(((u16 __iomem *)hose->cfg_data) + 1,
-				(u16)(val>>16));
-			break;
-		}
-	}
-	else
-#endif
-	{
-		if (len != 4) {
-			value = in_le32(hose->cfg_data);
-
-			offset = (offset & 0x3) << 3;
-			mask = (0xffffffff >> (32 - (len << 3)));
-			mask <<= offset;
-
-			value &= ~mask;
-			val = value | ((val << offset) & mask);
-		}
-
-		out_le32(hose->cfg_data, val);
-	}
-	mb();
-
-	out_be32(hose->cfg_addr, 0);
-	mb();
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static struct pci_ops mpc52xx_pci_ops = {
-	.read  = mpc52xx_pci_read_config,
-	.write = mpc52xx_pci_write_config
-};
-
-
-static void __init
-mpc52xx_pci_setup(struct pci_controller *hose,
-                  struct mpc52xx_pci __iomem *pci_regs)
-{
-	struct resource *res;
-	u32 tmp;
-	int iwcr0 = 0, iwcr1 = 0, iwcr2 = 0;
-
-	pr_debug("mpc52xx_pci_setup()\n");
-
-	pr_debug("iw0btar=%x iw1btar=%x iw2btar=%x iwcr=%x\n",
-	         in_be32(&pci_regs->iw0btar), in_be32(&pci_regs->iw1btar),
-	         in_be32(&pci_regs->iw2btar), in_be32(&pci_regs->iwcr));
-	pr_debug("tbatr0=%x tbatr1=%x tcr=%x gscr=%x\n",
-	         in_be32(&pci_regs->tbatr0), in_be32(&pci_regs->tbatr1),
-	         in_be32(&pci_regs->tcr), in_be32(&pci_regs->gscr));
-
-	/* Setup control regs */
-	tmp = in_be32(&pci_regs->scr);
-	tmp |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
-	out_be32(&pci_regs->scr, tmp);
-
-	/* Setup windows */
-	res = &hose->mem_resources[0];
-	if (res->flags) {
-		pr_debug("mem_resource[0] = {.start=%x, .end=%x, .flags=%lx}\n",
-		         res->start, res->end, res->flags);
-		out_be32(&pci_regs->iw0btar,
-		         MPC52xx_PCI_IWBTAR_TRANSLATION(res->start, res->start,
-		                  res->end - res->start + 1));
-		iwcr0 = MPC52xx_PCI_IWCR_ENABLE | MPC52xx_PCI_IWCR_MEM;
-		if (res->flags & IORESOURCE_PREFETCH)
-			iwcr0 |= MPC52xx_PCI_IWCR_READ_MULTI;
-		else
-			iwcr0 |= MPC52xx_PCI_IWCR_READ;
-	}
-
-	res = &hose->mem_resources[1];
-	if (res->flags) {
-		pr_debug("mem_resource[1] = {.start=%x, .end=%x, .flags=%lx}\n",
-		         res->start, res->end, res->flags);
-		out_be32(&pci_regs->iw1btar,
-		         MPC52xx_PCI_IWBTAR_TRANSLATION(res->start, res->start,
-		                  res->end - res->start + 1));
-		iwcr1 = MPC52xx_PCI_IWCR_ENABLE | MPC52xx_PCI_IWCR_MEM;
-		if (res->flags & IORESOURCE_PREFETCH)
-			iwcr1 |= MPC52xx_PCI_IWCR_READ_MULTI;
-		else
-			iwcr1 |= MPC52xx_PCI_IWCR_READ;
-	}
-
-	res = &hose->io_resource;
-	if (!res) {
-		printk(KERN_ERR "%s: Didn't find IO resources\n", __FILE__);
-		return;
-	}
-	pr_debug(".io_resource={.start=%x,.end=%x,.flags=%lx} "
-	         ".io_base_phys=%lx\n",
-	         res->start, res->end, res->flags, hose->io_base_phys);
-	out_be32(&pci_regs->iw2btar,
-	         MPC52xx_PCI_IWBTAR_TRANSLATION(hose->io_base_phys,
-	                                        res->start,
-	                                        res->end - res->start + 1));
-	iwcr2 = MPC52xx_PCI_IWCR_ENABLE | MPC52xx_PCI_IWCR_IO;
-
-	pr_debug("iwcr0=%x iwcr1=%x iwcr2=%x iwcr=%x old_iwcr=%x\n",
-		 iwcr0, iwcr1, iwcr2,
-		 MPC52xx_PCI_IWCR_PACK(iwcr0, iwcr1, iwcr2),
-		 in_be32(&pci_regs->iwcr));
-	out_be32(&pci_regs->iwcr, MPC52xx_PCI_IWCR_PACK(iwcr0, iwcr1, iwcr2));
-
-	out_be32(&pci_regs->tbatr0,
-		MPC52xx_PCI_TBATR_ENABLE | MPC52xx_PCI_TARGET_IO );
-	out_be32(&pci_regs->tbatr1,
-		MPC52xx_PCI_TBATR_ENABLE | MPC52xx_PCI_TARGET_MEM );
-
-	out_be32(&pci_regs->tcr, MPC52xx_PCI_TCR_LD);
-
-	/* Reset the exteral bus ( internal PCI controller is NOT resetted ) */
-	/* Not necessary and can be a bad thing if for example the bootloader
-	   is displaying a splash screen or ... Just left here for
-	   documentation purpose if anyone need it */
-	tmp = in_be32(&pci_regs->gscr);
-#if 0
-	out_be32(&pci_regs->gscr, tmp | MPC52xx_PCI_GSCR_PR);
-	udelay(50);
-#endif
-	out_be32(&pci_regs->gscr, tmp & ~MPC52xx_PCI_GSCR_PR);
-
-	pr_debug("iw0btar=%x iw1btar=%x iw2btar=%x iwcr=%x\n",
-	         in_be32(&pci_regs->iw0btar), in_be32(&pci_regs->iw1btar),
-	         in_be32(&pci_regs->iw2btar), in_be32(&pci_regs->iwcr));
-	pr_debug("tbatr0=%x tbatr1=%x tcr=%x gscr=%x\n",
-	         in_be32(&pci_regs->tbatr0), in_be32(&pci_regs->tbatr1),
-	         in_be32(&pci_regs->tcr), in_be32(&pci_regs->gscr));
-}
-
-static void
-mpc52xx_pci_fixup_resources(struct pci_dev *dev)
-{
-	int i;
-
-	pr_debug("mpc52xx_pci_fixup_resources() %.4x:%.4x\n",
-	         dev->vendor, dev->device);
-
-	/* We don't rely on boot loader for PCI and resets all
-	   devices */
-	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
-		struct resource *res = &dev->resource[i];
-		if (res->end > res->start) {	/* Only valid resources */
-			res->end -= res->start;
-			res->start = 0;
-			res->flags |= IORESOURCE_UNSET;
-		}
-	}
-
-	/* The PCI Host bridge of MPC52xx has a prefetch memory resource
-	   fixed to 1Gb. Doesn't fit in the resource system so we remove it */
-	if ( (dev->vendor == PCI_VENDOR_ID_MOTOROLA) &&
-	     (   dev->device == PCI_DEVICE_ID_MOTOROLA_MPC5200
-	      || dev->device == PCI_DEVICE_ID_MOTOROLA_MPC5200B) ) {
-		struct resource *res = &dev->resource[1];
-		res->start = res->end = res->flags = 0;
-	}
-}
-
-int __init
-mpc52xx_add_bridge(struct device_node *node)
-{
-	int len;
-	struct mpc52xx_pci __iomem *pci_regs;
-	struct pci_controller *hose;
-	const int *bus_range;
-	struct resource rsrc;
-
-	pr_debug("Adding PCI host bridge %s\n", node->full_name);
-
-	pci_assign_all_buses = 1;
-
-	if (of_address_to_resource(node, 0, &rsrc) != 0) {
-		printk(KERN_ERR "Can't get %s resources\n", node->full_name);
-		return -EINVAL;
-	}
-
-	bus_range = get_property(node, "bus-range", &len);
-	if (bus_range == NULL || len < 2 * sizeof(int)) {
-		printk(KERN_WARNING "Can't get bus-range for %s, assume"
-		        " bus 0\n", node->full_name);
-	}
-
-	hose = pcibios_alloc_controller();
-	if (!hose)
-		return -ENOMEM;
-
-	ppc_md.pcibios_fixup_resources = mpc52xx_pci_fixup_resources;
-
-	hose->arch_data = node;
-	hose->set_cfg_type = 1;
-
-	hose->first_busno = bus_range ? bus_range[0] : 0;
-	hose->last_busno = bus_range ? bus_range[1] : 0xff;
-
-	hose->bus_offset = 0;
-	hose->ops = &mpc52xx_pci_ops;
-
-	pci_regs = ioremap(rsrc.start, rsrc.end - rsrc.start + 1);
-	if (!pci_regs)
-		return -ENOMEM;
-
-	pci_process_bridge_OF_ranges(hose, node, 0);
-
-	hose->cfg_addr = &pci_regs->car;
-
-	hose->cfg_data = hose->io_base_virt;
-	hose->io_base_virt = ioremap(hose->io_base_phys,
-	                             hose->io_resource.end + 1 -
-	                             hose->io_resource.start);
-	isa_io_base = (unsigned long) hose->io_base_virt;
-
-	mpc52xx_pci_setup(hose, pci_regs);
-
-	return 0;
-}
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pci.h b/arch/powerpc/platforms/52xx/mpc52xx_pci.h
deleted file mode 100644
index 07a659e..0000000
--- a/arch/powerpc/platforms/52xx/mpc52xx_pci.h
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * PCI Include file the Freescale MPC52xx embedded cpu chips
- *
- * Inspired from code written by Dale Farnsworth <dfarnsworth@mvista.com>
- * for the 2.4 kernel.
- *
- * Copyright (C) 2004 Sylvain Munaut <tnt@246tNt.com>
- * Copyright (C) 2003 MontaVista, Software, Inc.
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2. This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- */
-
-#ifndef __SYSLIB_MPC52xx_PCI_H__
-#define __SYSLIB_MPC52xx_PCI_H__
-
-/* ======================================================================== */
-/* PCI windows config                                                       */
-/* ======================================================================== */
-
-#define MPC52xx_PCI_TARGET_IO	0xf0000000
-#define MPC52xx_PCI_TARGET_MEM	0x00000000
-
-
-/* ======================================================================== */
-/* Structures mapping & Defines for PCI Unit                                */
-/* ======================================================================== */
-
-#define MPC52xx_PCI_GSCR_BM		0x40000000
-#define MPC52xx_PCI_GSCR_PE		0x20000000
-#define MPC52xx_PCI_GSCR_SE		0x10000000
-#define MPC52xx_PCI_GSCR_XLB2PCI_MASK	0x07000000
-#define MPC52xx_PCI_GSCR_XLB2PCI_SHIFT	24
-#define MPC52xx_PCI_GSCR_IPG2PCI_MASK	0x00070000
-#define MPC52xx_PCI_GSCR_IPG2PCI_SHIFT	16
-#define MPC52xx_PCI_GSCR_BME		0x00004000
-#define MPC52xx_PCI_GSCR_PEE		0x00002000
-#define MPC52xx_PCI_GSCR_SEE		0x00001000
-#define MPC52xx_PCI_GSCR_PR		0x00000001
-
-
-#define MPC52xx_PCI_IWBTAR_TRANSLATION(proc_ad,pci_ad,size)	  \
-		( ( (proc_ad) & 0xff000000 )			| \
-		  ( (((size) - 1) >> 8) & 0x00ff0000 )		| \
-		  ( ((pci_ad) >> 16) & 0x0000ff00 ) )
-
-#define MPC52xx_PCI_IWCR_PACK(win0,win1,win2)	(((win0) << 24) | \
-						 ((win1) << 16) | \
-						 ((win2) <<  8))
-
-#define MPC52xx_PCI_IWCR_DISABLE	0x0
-#define MPC52xx_PCI_IWCR_ENABLE		0x1
-#define MPC52xx_PCI_IWCR_READ		0x0
-#define MPC52xx_PCI_IWCR_READ_LINE	0x2
-#define MPC52xx_PCI_IWCR_READ_MULTI	0x4
-#define MPC52xx_PCI_IWCR_MEM		0x0
-#define MPC52xx_PCI_IWCR_IO		0x8
-
-#define MPC52xx_PCI_TCR_P		0x01000000
-#define MPC52xx_PCI_TCR_LD		0x00010000
-
-#define MPC52xx_PCI_TBATR_DISABLE	0x0
-#define MPC52xx_PCI_TBATR_ENABLE	0x1
-
-
-#ifndef __ASSEMBLY__
-
-struct mpc52xx_pci {
-	u32	idr;		/* PCI + 0x00 */
-	u32	scr;		/* PCI + 0x04 */
-	u32	ccrir;		/* PCI + 0x08 */
-	u32	cr1;		/* PCI + 0x0C */
-	u32	bar0;		/* PCI + 0x10 */
-	u32	bar1;		/* PCI + 0x14 */
-	u8	reserved1[16];	/* PCI + 0x18 */
-	u32	ccpr;		/* PCI + 0x28 */
-	u32	sid;		/* PCI + 0x2C */
-	u32	erbar;		/* PCI + 0x30 */
-	u32	cpr;		/* PCI + 0x34 */
-	u8	reserved2[4];	/* PCI + 0x38 */
-	u32	cr2;		/* PCI + 0x3C */
-	u8	reserved3[32];	/* PCI + 0x40 */
-	u32	gscr;		/* PCI + 0x60 */
-	u32	tbatr0;		/* PCI + 0x64 */
-	u32	tbatr1;		/* PCI + 0x68 */
-	u32	tcr;		/* PCI + 0x6C */
-	u32	iw0btar;	/* PCI + 0x70 */
-	u32	iw1btar;	/* PCI + 0x74 */
-	u32	iw2btar;	/* PCI + 0x78 */
-	u8	reserved4[4];	/* PCI + 0x7C */
-	u32	iwcr;		/* PCI + 0x80 */
-	u32	icr;		/* PCI + 0x84 */
-	u32	isr;		/* PCI + 0x88 */
-	u32	arb;		/* PCI + 0x8C */
-	u8	reserved5[104];	/* PCI + 0x90 */
-	u32	car;		/* PCI + 0xF8 */
-	u8	reserved6[4];	/* PCI + 0xFC */
-};
-
-#endif  /* __ASSEMBLY__ */
-
-
-#endif  /* __SYSLIB_MPC52xx_PCI_H__ */
diff --git a/arch/powerpc/platforms/52xx/pci.c b/arch/powerpc/platforms/52xx/pci.c
new file mode 100644
index 0000000..14940af
--- /dev/null
+++ b/arch/powerpc/platforms/52xx/pci.c
@@ -0,0 +1,404 @@
+/*
+ * PCI code for the Freescale MPC52xx embedded CPU.
+ *
+ * Copyright (C) 2004 Secret Lab Technologies Ltd.
+ *                        Grant Likely <grant.likely@secretlab.ca>
+ * Copyright (C) 2004 Sylvain Munaut <tnt@246tNt.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#undef DEBUG
+
+#include <asm/pci.h>
+#include <asm/mpc52xx.h>
+#include <asm/delay.h>
+#include <asm/machdep.h>
+#include <linux/kernel.h>
+
+
+/* ======================================================================== */
+/* PCI windows config                                                       */
+/* ======================================================================== */
+
+#define MPC52xx_PCI_TARGET_IO	0xf0000000
+#define MPC52xx_PCI_TARGET_MEM	0x00000000
+
+/* ======================================================================== */
+/* Structures mapping & Defines for PCI Unit                                */
+/* ======================================================================== */
+
+#define MPC52xx_PCI_GSCR_BM		0x40000000
+#define MPC52xx_PCI_GSCR_PE		0x20000000
+#define MPC52xx_PCI_GSCR_SE		0x10000000
+#define MPC52xx_PCI_GSCR_XLB2PCI_MASK	0x07000000
+#define MPC52xx_PCI_GSCR_XLB2PCI_SHIFT	24
+#define MPC52xx_PCI_GSCR_IPG2PCI_MASK	0x00070000
+#define MPC52xx_PCI_GSCR_IPG2PCI_SHIFT	16
+#define MPC52xx_PCI_GSCR_BME		0x00004000
+#define MPC52xx_PCI_GSCR_PEE		0x00002000
+#define MPC52xx_PCI_GSCR_SEE		0x00001000
+#define MPC52xx_PCI_GSCR_PR		0x00000001
+
+
+#define MPC52xx_PCI_IWBTAR_TRANSLATION(proc_ad,pci_ad,size)	  \
+		( ( (proc_ad) & 0xff000000 )			| \
+		  ( (((size) - 1) >> 8) & 0x00ff0000 )		| \
+		  ( ((pci_ad) >> 16) & 0x0000ff00 ) )
+
+#define MPC52xx_PCI_IWCR_PACK(win0,win1,win2)	(((win0) << 24) | \
+						 ((win1) << 16) | \
+						 ((win2) <<  8))
+
+#define MPC52xx_PCI_IWCR_DISABLE	0x0
+#define MPC52xx_PCI_IWCR_ENABLE		0x1
+#define MPC52xx_PCI_IWCR_READ		0x0
+#define MPC52xx_PCI_IWCR_READ_LINE	0x2
+#define MPC52xx_PCI_IWCR_READ_MULTI	0x4
+#define MPC52xx_PCI_IWCR_MEM		0x0
+#define MPC52xx_PCI_IWCR_IO		0x8
+
+#define MPC52xx_PCI_TCR_P		0x01000000
+#define MPC52xx_PCI_TCR_LD		0x00010000
+
+#define MPC52xx_PCI_TBATR_DISABLE	0x0
+#define MPC52xx_PCI_TBATR_ENABLE	0x1
+
+struct mpc52xx_pci {
+	u32	idr;		/* PCI + 0x00 */
+	u32	scr;		/* PCI + 0x04 */
+	u32	ccrir;		/* PCI + 0x08 */
+	u32	cr1;		/* PCI + 0x0C */
+	u32	bar0;		/* PCI + 0x10 */
+	u32	bar1;		/* PCI + 0x14 */
+	u8	reserved1[16];	/* PCI + 0x18 */
+	u32	ccpr;		/* PCI + 0x28 */
+	u32	sid;		/* PCI + 0x2C */
+	u32	erbar;		/* PCI + 0x30 */
+	u32	cpr;		/* PCI + 0x34 */
+	u8	reserved2[4];	/* PCI + 0x38 */
+	u32	cr2;		/* PCI + 0x3C */
+	u8	reserved3[32];	/* PCI + 0x40 */
+	u32	gscr;		/* PCI + 0x60 */
+	u32	tbatr0;		/* PCI + 0x64 */
+	u32	tbatr1;		/* PCI + 0x68 */
+	u32	tcr;		/* PCI + 0x6C */
+	u32	iw0btar;	/* PCI + 0x70 */
+	u32	iw1btar;	/* PCI + 0x74 */
+	u32	iw2btar;	/* PCI + 0x78 */
+	u8	reserved4[4];	/* PCI + 0x7C */
+	u32	iwcr;		/* PCI + 0x80 */
+	u32	icr;		/* PCI + 0x84 */
+	u32	isr;		/* PCI + 0x88 */
+	u32	arb;		/* PCI + 0x8C */
+	u8	reserved5[104];	/* PCI + 0x90 */
+	u32	car;		/* PCI + 0xF8 */
+	u8	reserved6[4];	/* PCI + 0xFC */
+};
+
+static int
+mpc52xx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
+				int offset, int len, u32 *val)
+{
+	struct pci_controller *hose = bus->sysdata;
+	u32 value;
+
+	if (ppc_md.pci_exclude_device)
+		if (ppc_md.pci_exclude_device(bus->number, devfn))
+			return PCIBIOS_DEVICE_NOT_FOUND;
+
+	out_be32(hose->cfg_addr,
+		(1 << 31) |
+		((bus->number - hose->bus_offset) << 16) |
+		(devfn << 8) |
+		(offset & 0xfc));
+	mb();
+
+#if defined(CONFIG_PPC_MPC5200_BUGFIX)
+	if (bus->number != hose->bus_offset) {
+		/* workaround for the bug 435 of the MPC5200 (L25R);
+		 * Don't do 32 bits config access during type-1 cycles */
+		switch (len) {
+		      case 1:
+			value = in_8(((u8 __iomem *)hose->cfg_data) +
+			             (offset & 3));
+			break;
+		      case 2:
+			value = in_le16(((u16 __iomem *)hose->cfg_data) +
+			                ((offset>>1) & 1));
+			break;
+
+		      default:
+			value = in_le16((u16 __iomem *)hose->cfg_data) |
+				(in_le16(((u16 __iomem *)hose->cfg_data) + 1) << 16);
+			break;
+		}
+	}
+	else
+#endif
+	{
+		value = in_le32(hose->cfg_data);
+
+		if (len != 4) {
+			value >>= ((offset & 0x3) << 3);
+			value &= 0xffffffff >> (32 - (len << 3));
+		}
+	}
+
+	*val = value;
+
+	out_be32(hose->cfg_addr, 0);
+	mb();
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+mpc52xx_pci_write_config(struct pci_bus *bus, unsigned int devfn,
+				int offset, int len, u32 val)
+{
+	struct pci_controller *hose = bus->sysdata;
+	u32 value, mask;
+
+	if (ppc_md.pci_exclude_device)
+		if (ppc_md.pci_exclude_device(bus->number, devfn))
+			return PCIBIOS_DEVICE_NOT_FOUND;
+
+	out_be32(hose->cfg_addr,
+		(1 << 31) |
+		((bus->number - hose->bus_offset) << 16) |
+		(devfn << 8) |
+		(offset & 0xfc));
+	mb();
+
+#if defined(CONFIG_PPC_MPC5200_BUGFIX)
+	if (bus->number != hose->bus_offset) {
+		/* workaround for the bug 435 of the MPC5200 (L25R);
+		 * Don't do 32 bits config access during type-1 cycles */
+		switch (len) {
+		      case 1:
+			out_8(((u8 __iomem *)hose->cfg_data) +
+				(offset & 3), val);
+			break;
+		      case 2:
+			out_le16(((u16 __iomem *)hose->cfg_data) +
+				((offset>>1) & 1), val);
+			break;
+
+		      default:
+			out_le16((u16 __iomem *)hose->cfg_data,
+				(u16)val);
+			out_le16(((u16 __iomem *)hose->cfg_data) + 1,
+				(u16)(val>>16));
+			break;
+		}
+	}
+	else
+#endif
+	{
+		if (len != 4) {
+			value = in_le32(hose->cfg_data);
+
+			offset = (offset & 0x3) << 3;
+			mask = (0xffffffff >> (32 - (len << 3)));
+			mask <<= offset;
+
+			value &= ~mask;
+			val = value | ((val << offset) & mask);
+		}
+
+		out_le32(hose->cfg_data, val);
+	}
+	mb();
+
+	out_be32(hose->cfg_addr, 0);
+	mb();
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops mpc52xx_pci_ops = {
+	.read  = mpc52xx_pci_read_config,
+	.write = mpc52xx_pci_write_config
+};
+
+
+static void __init
+mpc52xx_pci_setup(struct pci_controller *hose,
+                  struct mpc52xx_pci __iomem *pci_regs)
+{
+	struct resource *res;
+	u32 tmp;
+	int iwcr0 = 0, iwcr1 = 0, iwcr2 = 0;
+
+	pr_debug("mpc52xx_pci_setup(hose=%p, pci_regs=%p)\n", hose, pci_regs);
+
+	/* pci_process_bridge_OF_ranges() found all our addresses for us;
+	 * now store them in the right places */
+	hose->cfg_addr = &pci_regs->car;
+	hose->cfg_data = hose->io_base_virt;
+	hose->io_base_virt = ioremap(hose->io_base_phys,
+	                             hose->io_resource.end + 1 -
+	                             hose->io_resource.start);
+	isa_io_base = (unsigned long) hose->io_base_virt;
+
+	/* Control regs */
+	tmp = in_be32(&pci_regs->scr);
+	tmp |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	out_be32(&pci_regs->scr, tmp);
+
+	/* Memory windows */
+	res = &hose->mem_resources[0];
+	if (res->flags) {
+		pr_debug("mem_resource[0] = {.start=%x, .end=%x, .flags=%lx}\n",
+		         res->start, res->end, res->flags);
+		out_be32(&pci_regs->iw0btar,
+		         MPC52xx_PCI_IWBTAR_TRANSLATION(res->start, res->start,
+		                  res->end - res->start + 1));
+		iwcr0 = MPC52xx_PCI_IWCR_ENABLE | MPC52xx_PCI_IWCR_MEM;
+		if (res->flags & IORESOURCE_PREFETCH)
+			iwcr0 |= MPC52xx_PCI_IWCR_READ_MULTI;
+		else
+			iwcr0 |= MPC52xx_PCI_IWCR_READ;
+	}
+
+	res = &hose->mem_resources[1];
+	if (res->flags) {
+		pr_debug("mem_resource[1] = {.start=%x, .end=%x, .flags=%lx}\n",
+		         res->start, res->end, res->flags);
+		out_be32(&pci_regs->iw1btar,
+		         MPC52xx_PCI_IWBTAR_TRANSLATION(res->start, res->start,
+		                  res->end - res->start + 1));
+		iwcr1 = MPC52xx_PCI_IWCR_ENABLE | MPC52xx_PCI_IWCR_MEM;
+		if (res->flags & IORESOURCE_PREFETCH)
+			iwcr1 |= MPC52xx_PCI_IWCR_READ_MULTI;
+		else
+			iwcr1 |= MPC52xx_PCI_IWCR_READ;
+	}
+
+	/* IO resources */
+	res = &hose->io_resource;
+	if (!res) {
+		printk(KERN_ERR "%s: Didn't find IO resources\n", __FILE__);
+		return;
+	}
+	pr_debug(".io_resource={.start=%x,.end=%x,.flags=%lx} "
+	         ".io_base_phys=%lx\n",
+	         res->start, res->end, res->flags, hose->io_base_phys);
+	out_be32(&pci_regs->iw2btar,
+	         MPC52xx_PCI_IWBTAR_TRANSLATION(hose->io_base_phys,
+	                                        res->start,
+	                                        res->end - res->start + 1));
+	iwcr2 = MPC52xx_PCI_IWCR_ENABLE | MPC52xx_PCI_IWCR_IO;
+
+	/* Set all the IWCR fields at once; they're in the same reg */
+	out_be32(&pci_regs->iwcr, MPC52xx_PCI_IWCR_PACK(iwcr0, iwcr1, iwcr2));
+
+	out_be32(&pci_regs->tbatr0,
+		MPC52xx_PCI_TBATR_ENABLE | MPC52xx_PCI_TARGET_IO );
+	out_be32(&pci_regs->tbatr1,
+		MPC52xx_PCI_TBATR_ENABLE | MPC52xx_PCI_TARGET_MEM );
+
+	out_be32(&pci_regs->tcr, MPC52xx_PCI_TCR_LD);
+
+#if 0
+	/* Reset the exteral bus ( internal PCI controller is NOT resetted ) */
+	/* Not necessary and can be a bad thing if for example the bootloader
+	   is displaying a splash screen or ... Just left here for
+	   documentation purpose if anyone need it */
+	tmp = in_be32(&pci_regs->gscr);
+	out_be32(&pci_regs->gscr, tmp | MPC52xx_PCI_GSCR_PR);
+	udelay(50);
+	out_be32(&pci_regs->gscr, tmp & ~MPC52xx_PCI_GSCR_PR);
+#endif
+}
+
+static void
+mpc52xx_pci_fixup_resources(struct pci_dev *dev)
+{
+	int i;
+
+	pr_debug("mpc52xx_pci_fixup_resources() %.4x:%.4x\n",
+	         dev->vendor, dev->device);
+
+	/* We don't rely on boot loader for PCI and resets all
+	   devices */
+	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+		struct resource *res = &dev->resource[i];
+		if (res->end > res->start) {	/* Only valid resources */
+			res->end -= res->start;
+			res->start = 0;
+			res->flags |= IORESOURCE_UNSET;
+		}
+	}
+
+	/* The PCI Host bridge of MPC52xx has a prefetch memory resource
+	   fixed to 1Gb. Doesn't fit in the resource system so we remove it */
+	if ( (dev->vendor == PCI_VENDOR_ID_MOTOROLA) &&
+	     (   dev->device == PCI_DEVICE_ID_MOTOROLA_MPC5200
+	      || dev->device == PCI_DEVICE_ID_MOTOROLA_MPC5200B) ) {
+		struct resource *res = &dev->resource[1];
+		res->start = res->end = res->flags = 0;
+	}
+}
+
+int __init
+mpc52xx_add_bridge(struct device_node *node)
+{
+	int len;
+	struct mpc52xx_pci __iomem *pci_regs;
+	struct pci_controller *hose;
+	const int *bus_range;
+	struct resource rsrc;
+
+	pr_debug("Adding MPC52xx PCI host bridge %s\n", node->full_name);
+
+	pci_assign_all_buses = 1;
+
+	if (of_address_to_resource(node, 0, &rsrc) != 0) {
+		printk(KERN_ERR "Can't get %s resources\n", node->full_name);
+		return -EINVAL;
+	}
+
+	bus_range = get_property(node, "bus-range", &len);
+	if (bus_range == NULL || len < 2 * sizeof(int)) {
+		printk(KERN_WARNING "Can't get %s bus-range, assume bus 0\n",
+		       node->full_name);
+		bus_range = NULL;
+	}
+
+	/* There are some PCI quirks on the 52xx, register the hook to
+	 * fix them. */
+	ppc_md.pcibios_fixup_resources = mpc52xx_pci_fixup_resources;
+
+	/* Alloc and initialize the pci controller.  Values in the device
+	 * tree are needed to configure the 52xx PCI controller.  Rather
+	 * than parse the tree here, let pci_process_bridge_OF_ranges()
+	 * do it for us and extract the values after the fact */
+	hose = pcibios_alloc_controller();
+	if (!hose)
+		return -ENOMEM;
+
+	hose->arch_data = node;
+	hose->set_cfg_type = 1;
+
+	hose->first_busno = bus_range ? bus_range[0] : 0;
+	hose->last_busno = bus_range ? bus_range[1] : 0xff;
+
+	hose->bus_offset = 0;
+	hose->ops = &mpc52xx_pci_ops;
+
+	pci_regs = ioremap(rsrc.start, rsrc.end - rsrc.start + 1);
+	if (!pci_regs)
+		return -ENOMEM;
+
+	pci_process_bridge_OF_ranges(hose, node, 0);
+
+	/* Finish setting up PCI using values obtained by
+	 * pci_proces_bridge_OF_ranges */
+	mpc52xx_pci_setup(hose, pci_regs);
+
+	return 0;
+}
-- 
1.4.4.2