From 9569c40668290408eac447f9be99dab603c8e34c Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 5 Mar 2015 12:25:26 -0700 Subject: dm: sandbox: pci: Add PCI support for sandbox Add the required header information, device tree nodes and I/O accessor functions to support PCI on sandbox. All devices are emulated by drivers which can be added as required for testing or development. Signed-off-by: Simon Glass --- arch/sandbox/include/asm/io.h | 16 ++++++++--- arch/sandbox/include/asm/processor.h | 12 ++++++++ arch/sandbox/include/asm/test.h | 7 ++++- arch/sandbox/include/asm/u-boot-sandbox.h | 48 +++++++++++++++++++++++++++++++ 4 files changed, 78 insertions(+), 5 deletions(-) create mode 100644 arch/sandbox/include/asm/processor.h (limited to 'arch/sandbox/include') diff --git a/arch/sandbox/include/asm/io.h b/arch/sandbox/include/asm/io.h index 895fcb872f6..5b87fde1161 100644 --- a/arch/sandbox/include/asm/io.h +++ b/arch/sandbox/include/asm/io.h @@ -22,10 +22,7 @@ void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags); /* * Take down a mapping set up by map_physmem(). */ -static inline void unmap_physmem(void *vaddr, unsigned long flags) -{ - -} +void unmap_physmem(const void *vaddr, unsigned long flags); /* For sandbox, we want addresses to point into our RAM buffer */ static inline void *map_sysmem(phys_addr_t paddr, unsigned long len) @@ -33,8 +30,10 @@ static inline void *map_sysmem(phys_addr_t paddr, unsigned long len) return map_physmem(paddr, len, MAP_WRBACK); } +/* Remove a previous mapping */ static inline void unmap_sysmem(const void *vaddr) { + unmap_physmem(vaddr, MAP_WRBACK); } /* Map from a pointer to our RAM buffer */ @@ -48,6 +47,15 @@ phys_addr_t map_to_sysmem(const void *ptr); #define writew(v, addr) #define writel(v, addr) +/* I/O access functions */ +int inl(unsigned int addr); +int inw(unsigned int addr); +int inb(unsigned int addr); + +void outl(unsigned int value, unsigned int addr); +void outw(unsigned int value, unsigned int addr); +void outb(unsigned int value, unsigned int addr); + #include #endif diff --git a/arch/sandbox/include/asm/processor.h b/arch/sandbox/include/asm/processor.h new file mode 100644 index 00000000000..3c1794e92d2 --- /dev/null +++ b/arch/sandbox/include/asm/processor.h @@ -0,0 +1,12 @@ +/* + * Copyright (c) 2014 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _ASM_PROCESSOR_H +#define _ASM_PROCESSOR_H + +/* This file is required for PCI */ + +#endif diff --git a/arch/sandbox/include/asm/test.h b/arch/sandbox/include/asm/test.h index 25a0c859714..8e490e96d7a 100644 --- a/arch/sandbox/include/asm/test.h +++ b/arch/sandbox/include/asm/test.h @@ -10,7 +10,12 @@ #define __ASM_TEST_H /* The sandbox driver always permits an I2C device with this address */ -#define SANDBOX_I2C_TEST_ADDR 0x59 +#define SANDBOX_I2C_TEST_ADDR 0x59 + +#define SANDBOX_PCI_VENDOR_ID 0x1234 +#define SANDBOX_PCI_DEVICE_ID 0x5678 +#define SANDBOX_PCI_CLASS_CODE PCI_CLASS_CODE_COMM +#define SANDBOX_PCI_CLASS_SUB_CODE PCI_CLASS_SUB_CODE_COMM_SERIAL enum sandbox_i2c_eeprom_test_mode { SIE_TEST_MODE_NONE, diff --git a/arch/sandbox/include/asm/u-boot-sandbox.h b/arch/sandbox/include/asm/u-boot-sandbox.h index 770ab5c9cc0..d5b93616839 100644 --- a/arch/sandbox/include/asm/u-boot-sandbox.h +++ b/arch/sandbox/include/asm/u-boot-sandbox.h @@ -27,4 +27,52 @@ int cleanup_before_linux(void); /* drivers/video/sandbox_sdl.c */ int sandbox_lcd_sdl_early_init(void); +/** + * pci_map_physmem() - map a PCI device into memory + * + * This is used on sandbox to map a device into memory so that it can be + * used with normal memory access. After this call, some part of the device's + * internal structure becomes visible. + * + * This function is normally called from sandbox's map_sysmem() automatically. + * + * @paddr: Physical memory address, normally corresponding to a PCI BAR + * @lenp: On entry, the size of the area to map, On exit it is updated + * to the size actually mapped, which may be less if the device + * has less space + * @devp: Returns the device which mapped into this space + * @ptrp: Returns a pointer to the mapped address. The device's space + * can be accessed as @lenp bytes starting here + * @return 0 if OK, -ve on error + */ +int pci_map_physmem(phys_addr_t paddr, unsigned long *lenp, + struct udevice **devp, void **ptrp); + +/** + * pci_unmap_physmem() - undo a memory mapping + * + * This must be called after pci_map_physmem() to undo the mapping. + * + * @paddr: Physical memory address, as passed to pci_map_physmem() + * @len: Size of area mapped, as returned by pci_map_physmem() + * @dev: Device to unmap, as returned by pci_map_physmem() + * @return 0 if OK, -ve on error + */ +int pci_unmap_physmem(const void *addr, unsigned long len, + struct udevice *dev); + +/** + * sandbox_set_enable_pci_map() - Enable / disable PCI address mapping + * + * Since address mapping involves calling every driver, provide a way to + * enable and disable this. It can be handled automatically by the emulator + * uclass, which knows if any emulators are currently active. + * + * If this is disabled, pci_map_physmem() will not be called from + * map_sysmem(). + * + * @enable: 0 to disable, 1 to enable + */ +void sandbox_set_enable_pci_map(int enable); + #endif /* _U_BOOT_SANDBOX_H_ */ -- cgit v1.2.3