From 450008b5a62bb09445ae05c4d01d510386c9435d Mon Sep 17 00:00:00 2001 From: Deepak Saxena Date: Wed, 6 Jul 2005 23:06:05 +0100 Subject: [PATCH] [PATCH] ARM: 2792/1: IXP4xx iomap API implementation Patch from Deepak Saxena This patch implements the iomap API for Intel IXP4xx NPU systems. We need to implement our own version of the API functions b/c of the PCI hostbridge does not provide the capability to map PCI I/O space into the CPU's physical memory space. In addition, if a system has more than 64M of PCI memory mapped BARs, PCI memory must also be accessed indirectly. This patch changes the assignment of PCI I/O resources to fall into to 0x0000:0xffff range so that we can trap I/O areas in our ioread/iowrite macros. Signed-off-by: Deepak Saxena Signed-off-by: Russell King --- arch/arm/mach-ixp4xx/common-pci.c | 4 +- include/asm-arm/arch-ixp4xx/io.h | 176 +++++++++++++++++++++++++++++- 2 files changed, 177 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-ixp4xx/common-pci.c b/arch/arm/mach-ixp4xx/common-pci.c index aa92e3708838..2b544363c078 100644 --- a/arch/arm/mach-ixp4xx/common-pci.c +++ b/arch/arm/mach-ixp4xx/common-pci.c @@ -453,8 +453,8 @@ int ixp4xx_setup(int nr, struct pci_sys_data *sys) local_write_config(PCI_COMMAND, 2, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); res[0].name = "PCI I/O Space"; - res[0].start = 0x00001000; - res[0].end = 0xffff0000; + res[0].start = 0x00000000; + res[0].end = 0x0000ffff; res[0].flags = IORESOURCE_IO; res[1].name = "PCI Memory Space"; diff --git a/include/asm-arm/arch-ixp4xx/io.h b/include/asm-arm/arch-ixp4xx/io.h index c27b9d3079a7..7495026e2c18 100644 --- a/include/asm-arm/arch-ixp4xx/io.h +++ b/include/asm-arm/arch-ixp4xx/io.h @@ -3,7 +3,7 @@ * * Author: Deepak Saxena * - * Copyright (C) 2002-2004 MontaVista Software, Inc. + * Copyright (C) 2002-2005 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 version 2 as @@ -383,6 +383,180 @@ __ixp4xx_insl(u32 io_addr, u32 *vaddr, u32 count) *vaddr++ = inl(io_addr); } +#define __is_io_address(p) (((unsigned long)p >= 0x0) && \ + ((unsigned long)p <= 0x0000ffff)) +static inline unsigned int +__ixp4xx_ioread8(void __iomem *port) +{ + if (__is_io_address(port)) + return (unsigned int)__ixp4xx_inb((unsigned int)port); + else +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + return (unsigned int)__raw_readb((u32)port); +#else + return (unsigned int)__ixp4xx_readb((u32)port); +#endif +} + +static inline void +__ixp4xx_ioread8_rep(u32 port, u8 *vaddr, u32 count) +{ + if (__is_io_address(port)) + __ixp4xx_insb(port, vaddr, count); + else +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + __raw_readsb((void __iomem *)port, vaddr, count); +#else + __ixp4xx_readsb(port, vaddr, count); +#endif +} + +static inline unsigned int +__ixp4xx_ioread16(void __iomem *port) +{ + if (__is_io_address(port)) + return (unsigned int)__ixp4xx_inw((unsigned int)port); + else +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + return le16_to_cpu(__raw_readw((u32)port)); +#else + return (unsigned int)__ixp4xx_readw((u32)port); +#endif +} + +static inline void +__ixp4xx_ioread16_rep(u32 port, u16 *vaddr, u32 count) +{ + if (__is_io_address(port)) + __ixp4xx_insw(port, vaddr, count); + else +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + __raw_readsw((void __iomem *)port, vaddr, count); +#else + __ixp4xx_readsw(port, vaddr, count); +#endif +} + +static inline unsigned int +__ixp4xx_ioread32(void __iomem *port) +{ + if (__is_io_address(port)) + return (unsigned int)__ixp4xx_inl((unsigned int)port); + else { +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + return le32_to_cpu(__raw_readl((u32)port)); +#else + return (unsigned int)__ixp4xx_readl((u32)port); +#endif + } +} + +static inline void +__ixp4xx_ioread32_rep(u32 port, u32 *vaddr, u32 count) +{ + if (__is_io_address(port)) + __ixp4xx_insl(port, vaddr, count); + else +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + __raw_readsl((void __iomem *)port, vaddr, count); +#else + __ixp4xx_readsl(port, vaddr, count); +#endif +} + +static inline void +__ixp4xx_iowrite8(u8 value, void __iomem *port) +{ + if (__is_io_address(port)) + __ixp4xx_outb(value, (unsigned int)port); + else +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + __raw_writeb(value, (u32)port); +#else + __ixp4xx_writeb(value, (u32)port); +#endif +} + +static inline void +__ixp4xx_iowrite8_rep(u32 port, u8 *vaddr, u32 count) +{ + if (__is_io_address(port)) + __ixp4xx_outsb(port, vaddr, count); +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + __raw_writesb((void __iomem *)port, vaddr, count); +#else + __ixp4xx_writesb(port, vaddr, count); +#endif +} + +static inline void +__ixp4xx_iowrite16(u16 value, void __iomem *port) +{ + if (__is_io_address(port)) + __ixp4xx_outw(value, (unsigned int)port); + else +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + __raw_writew(cpu_to_le16(value), (u32)port); +#else + __ixp4xx_writew(value, (u32)port); +#endif +} + +static inline void +__ixp4xx_iowrite16_rep(u32 port, u16 *vaddr, u32 count) +{ + if (__is_io_address(port)) + __ixp4xx_outsw(port, vaddr, count); +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + __raw_readsw((void __iomem *)port, vaddr, count); +#else + __ixp4xx_writesw(port, vaddr, count); +#endif +} + +static inline void +__ixp4xx_iowrite32(u32 value, void __iomem *port) +{ + if (__is_io_address(port)) + __ixp4xx_outl(value, (unsigned int)port); + else +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + __raw_writel(cpu_to_le32(value), (u32)port); +#else + __ixp4xx_writel(value, (u32)port); +#endif +} + +static inline void +__ixp4xx_iowrite32_rep(u32 port, u32 *vaddr, u32 count) +{ + if (__is_io_address(port)) + __ixp4xx_outsl(port, vaddr, count); +#ifndef CONFIG_IXP4XX_INDIRECT_PCI + __raw_readsl((void __iomem *)port, vaddr, count); +#else + __ixp4xx_outsl(port, vaddr, count); +#endif +} + +#define ioread8(p) __ixp4xx_ioread8(p) +#define ioread16(p) __ixp4xx_ioread16(p) +#define ioread32(p) __ixp4xx_ioread32(p) + +#define ioread8_rep(p, v, c) __ixp4xx_ioread8_rep(p, v, c) +#define ioread16_rep(p, v, c) __ixp4xx_ioread16_rep(p, v, c) +#define ioread32_rep(p, v, c) __ixp4xx_ioread32_rep(p, v, c) + +#define iowrite8(v,p) __ixp4xx_iowrite8(v,p) +#define iowrite16(v,p) __ixp4xx_iowrite16(v,p) +#define iowrite32(v,p) __ixp4xx_iowrite32(v,p) + +#define iowrite8_rep(p, v, c) __ixp4xx_iowrite8_rep(p, v, c) +#define iowrite16_rep(p, v, c) __ixp4xx_iowrite16_rep(p, v, c) +#define iowrite32_rep(p, v, c) __ixp4xx_iowrite32_rep(p, v, c) + +#define ioport_map(port, nr) ((void __iomem*)port) +#define ioport_unmap(addr) #endif // __ASM_ARM_ARCH_IO_H -- 2.30.2