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Message-ID: <20221025065214.4663-13-thippeswamy.havalige@amd.com>
Date: Tue, 25 Oct 2022 12:22:13 +0530
From: Thippeswamy Havalige <thippeswamy.havalige@....com>
To: <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>, <krzysztof.kozlowski@...aro.org>
CC: <bhelgaas@...gle.com>, <michals@...inx.com>, <robh+dt@...nel.org>,
<lorenzo.pieralisi@....com>, <bharat.kumar.gogada@....com>,
"Thippeswamy Havalige" <thippeswamy.havalige@....com>
Subject: [PATCH 12/13] microblaze/PCI: Remove support for Xilinx PCI host bridge
This patch removes support for the Xilinx PCI host
bridge IPcore.
Signed-off-by: Thippeswamy Havalige <thippeswamy.havalige@....com>
---
arch/microblaze/Kconfig | 8 ---
arch/microblaze/include/asm/pci-bridge.h | 6 --
arch/microblaze/include/asm/pci.h | 5 --
arch/microblaze/pci/Makefile | 1 -
arch/microblaze/pci/xilinx_pci.c | 105 -------------------------------
5 files changed, 125 deletions(-)
delete mode 100644 arch/microblaze/pci/xilinx_pci.c
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 996132a..9bacdab 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -205,11 +205,3 @@ config TASK_SIZE
default "0x80000000"
endmenu
-
-menu "Bus Options"
-
-config PCI_XILINX
- bool "Xilinx PCI host bridge support"
- depends on PCI
-
-endmenu
diff --git a/arch/microblaze/include/asm/pci-bridge.h b/arch/microblaze/include/asm/pci-bridge.h
index 5db2c66..be5f504 100644
--- a/arch/microblaze/include/asm/pci-bridge.h
+++ b/arch/microblaze/include/asm/pci-bridge.h
@@ -25,7 +25,6 @@ static inline int pcibios_vaddr_is_ioport(void __iomem *address)
*/
struct pci_controller {
struct pci_bus *bus;
- struct device_node *dn;
struct list_head list_node;
void __iomem *io_base_virt;
@@ -37,11 +36,6 @@ struct pci_controller {
};
#ifdef CONFIG_PCI
-static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
-{
- return bus->sysdata;
-}
-
static inline int isa_vaddr_is_ioport(void __iomem *address)
{
/* No specific ISA handling on ppc32 at this stage, it
diff --git a/arch/microblaze/include/asm/pci.h b/arch/microblaze/include/asm/pci.h
index a75bf3b..91f1f71 100644
--- a/arch/microblaze/include/asm/pci.h
+++ b/arch/microblaze/include/asm/pci.h
@@ -38,12 +38,7 @@
struct file;
-/* This part of code was originally in xilinx-pci.h */
-#ifdef CONFIG_PCI_XILINX
-extern void __init xilinx_pci_init(void);
-#else
static inline void __init xilinx_pci_init(void) { return; }
-#endif
#endif /* __KERNEL__ */
#endif /* __ASM_MICROBLAZE_PCI_H */
diff --git a/arch/microblaze/pci/Makefile b/arch/microblaze/pci/Makefile
index 3cbdf25..293b416 100644
--- a/arch/microblaze/pci/Makefile
+++ b/arch/microblaze/pci/Makefile
@@ -4,4 +4,3 @@
#
obj-$(CONFIG_PCI) += pci-common.o iomap.o
-obj-$(CONFIG_PCI_XILINX) += xilinx_pci.o
diff --git a/arch/microblaze/pci/xilinx_pci.c b/arch/microblaze/pci/xilinx_pci.c
deleted file mode 100644
index 5dc4182..0000000
--- a/arch/microblaze/pci/xilinx_pci.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * PCI support for Xilinx plbv46_pci soft-core which can be used on
- * Xilinx Virtex ML410 / ML510 boards.
- *
- * Copyright 2009 Roderick Colenbrander
- * Copyright 2009 Secret Lab Technologies Ltd.
- *
- * The pci bridge fixup code was copied from ppc4xx_pci.c and was written
- * by Benjamin Herrenschmidt.
- * Copyright 2007 Ben. Herrenschmidt <benh@...nel.crashing.org>, IBM Corp.
- *
- * 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.
- */
-
-#include <linux/ioport.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/pci.h>
-#include <linux/io.h>
-
-#define XPLB_PCI_ADDR 0x10c
-#define XPLB_PCI_DATA 0x110
-#define XPLB_PCI_BUS 0x114
-
-#define PCI_HOST_ENABLE_CMD (PCI_COMMAND_SERR | PCI_COMMAND_PARITY | \
- PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY)
-
-static const struct of_device_id xilinx_pci_match[] = {
- { .compatible = "xlnx,plbv46-pci-1.03.a", },
- {}
-};
-
-/**
- * xilinx_pci_fixup_bridge - Block Xilinx PHB configuration.
- */
-static void xilinx_pci_fixup_bridge(struct pci_dev *dev)
-{
- struct pci_controller *hose;
- int i;
-
- if (dev->devfn || dev->bus->self)
- return;
-
- hose = pci_bus_to_host(dev->bus);
- if (!hose)
- return;
-
- if (!of_match_node(xilinx_pci_match, hose->dn))
- return;
-
- /* Hide the PCI host BARs from the kernel as their content doesn't
- * fit well in the resource management
- */
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
- }
-
- dev_info(&dev->dev, "Hiding Xilinx plb-pci host bridge resources %s\n",
- pci_name(dev));
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, xilinx_pci_fixup_bridge);
-
-#ifdef DEBUG
-/**
- * xilinx_pci_exclude_device - Don't do config access for non-root bus
- *
- * This is a hack. Config access to any bus other than bus 0 does not
- * currently work on the ML510 so we prevent it here.
- */
-static int
-xilinx_pci_exclude_device(struct pci_controller *hose, u_char bus, u8 devfn)
-{
- return (bus != 0);
-}
-#endif
-
-/**
- * xilinx_pci_init - Find and register a Xilinx PCI host bridge
- */
-void __init xilinx_pci_init(void)
-{
- struct resource r;
- void __iomem *pci_reg;
- struct device_node *pci_node;
-
- pci_node = of_find_matching_node(NULL, xilinx_pci_match);
- if (!pci_node)
- return;
-
- if (of_address_to_resource(pci_node, 0, &r)) {
- pr_err("xilinx-pci: cannot resolve base address\n");
- return;
- }
-
- /* Set the max bus number to 255, and bus/subbus no's to 0 */
- pci_reg = of_iomap(pci_node, 0);
- WARN_ON(!pci_reg);
- out_be32(pci_reg + XPLB_PCI_BUS, 0x000000ff);
- iounmap(pci_reg);
-
-}
--
1.8.3.1
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