Initial commit

target/linux/ath79/patches-6.6/316-MIPS-ath79-swizzle-pci-address-for-ar71xx.patch

@@ -0,0 +1,109 @@
+From: Gabor Juhos <juhosg@openwrt.org>
+Subject: [PATCH] ar71xx: swizzle address for PCI byte/word access on AR71xx
+
+Closes #11683.
+
+SVN-Revision: 32639
+---
+ .../mips/include/asm/mach-ath79/mangle-port.h | 111 ++++++++++++++++++
+ 1 file changed, 111 insertions(+)
+ create mode 100644 arch/mips/include/asm/mach-ath79/mangle-port.h
+
+--- /dev/null
++++ b/arch/mips/include/asm/mach-ath79/mangle-port.h
+@@ -0,0 +1,37 @@
++/*
++ *  Copyright (C) 2012 Gabor Juhos <juhosg@openwrt.org>
++ *
++ *  This file was derived from: inlude/asm-mips/mach-generic/mangle-port.h
++ *      Copyright (C) 2003, 2004 Ralf Baechle
++ *
++ *  This program is free software; you can redistribute it and/or modify it
++ *  under the terms of the GNU General Public License version 2 as published
++ *  by the Free Software Foundation.
++ */
++
++#ifndef __ASM_MACH_ATH79_MANGLE_PORT_H
++#define __ASM_MACH_ATH79_MANGLE_PORT_H
++
++#ifdef CONFIG_PCI_AR71XX
++extern unsigned long (ath79_pci_swizzle_b)(unsigned long port);
++extern unsigned long (ath79_pci_swizzle_w)(unsigned long port);
++#else
++#define ath79_pci_swizzle_b(port) (port)
++#define ath79_pci_swizzle_w(port) (port)
++#endif
++
++#define __swizzle_addr_b(port)	ath79_pci_swizzle_b(port)
++#define __swizzle_addr_w(port)	ath79_pci_swizzle_w(port)
++#define __swizzle_addr_l(port)	(port)
++#define __swizzle_addr_q(port)	(port)
++
++# define ioswabb(a, x)           (x)
++# define __mem_ioswabb(a, x)     (x)
++# define ioswabw(a, x)           (x)
++# define __mem_ioswabw(a, x)     cpu_to_le16(x)
++# define ioswabl(a, x)           (x)
++# define __mem_ioswabl(a, x)     cpu_to_le32(x)
++# define ioswabq(a, x)           (x)
++# define __mem_ioswabq(a, x)     cpu_to_le64(x)
++
++#endif /* __ASM_MACH_ATH79_MANGLE_PORT_H */
+--- a/arch/mips/pci/pci-ar71xx.c
++++ b/arch/mips/pci/pci-ar71xx.c
+@@ -68,6 +68,45 @@ static const u32 ar71xx_pci_read_mask[8]
+ 	0, 0xff, 0xffff, 0, 0xffffffff, 0, 0, 0
+ };
+ 
++static unsigned long (*__ath79_pci_swizzle_b)(unsigned long port);
++static unsigned long (*__ath79_pci_swizzle_w)(unsigned long port);
++
++static inline bool ar71xx_is_pci_addr(unsigned long port)
++{
++	unsigned long phys = CPHYSADDR(port);
++
++	return (phys >= AR71XX_PCI_MEM_BASE &&
++		phys < AR71XX_PCI_MEM_BASE + AR71XX_PCI_MEM_SIZE);
++}
++
++static unsigned long ar71xx_pci_swizzle_b(unsigned long port)
++{
++	return ar71xx_is_pci_addr(port) ? port ^ 3 : port;
++}
++
++static unsigned long ar71xx_pci_swizzle_w(unsigned long port)
++{
++	return ar71xx_is_pci_addr(port) ? port ^ 2 : port;
++}
++
++unsigned long ath79_pci_swizzle_b(unsigned long port)
++{
++	if (__ath79_pci_swizzle_b)
++		return __ath79_pci_swizzle_b(port);
++
++	return port;
++}
++EXPORT_SYMBOL(ath79_pci_swizzle_b);
++
++unsigned long ath79_pci_swizzle_w(unsigned long port)
++{
++	if (__ath79_pci_swizzle_w)
++		return __ath79_pci_swizzle_w(port);
++
++	return port;
++}
++EXPORT_SYMBOL(ath79_pci_swizzle_w);
++
+ static inline u32 ar71xx_pci_get_ble(int where, int size, int local)
+ {
+ 	u32 t;
+@@ -275,6 +314,9 @@ static int ar71xx_pci_probe(struct platf
+ 
+ 	register_pci_controller(&apc->pci_ctrl);
+ 
++	__ath79_pci_swizzle_b = ar71xx_pci_swizzle_b;
++	__ath79_pci_swizzle_w = ar71xx_pci_swizzle_w;
++
+ 	return 0;
+ }
+