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116 lines
3.2 KiB
116 lines
3.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* arch/arm/mach-ixp4xx/include/mach/platform.h |
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* |
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* Constants and functions that are useful to IXP4xx platform-specific code |
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* and device drivers. |
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* |
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* Copyright (C) 2004 MontaVista Software, Inc. |
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*/ |
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#ifndef __ASM_ARCH_HARDWARE_H__ |
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#error "Do not include this directly, instead #include <mach/hardware.h>" |
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#endif |
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#ifndef __ASSEMBLY__ |
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#include <linux/reboot.h> |
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#include <linux/platform_data/eth_ixp4xx.h> |
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#include <asm/types.h> |
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#ifndef __ARMEB__ |
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#define REG_OFFSET 0 |
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#else |
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#define REG_OFFSET 3 |
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#endif |
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/* |
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* Expansion bus memory regions |
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*/ |
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#define IXP4XX_EXP_BUS_BASE_PHYS (0x50000000) |
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/* |
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* The expansion bus on the IXP4xx can be configured for either 16 or |
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* 32MB windows and the CS offset for each region changes based on the |
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* current configuration. This means that we cannot simply hardcode |
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* each offset. ixp4xx_sys_init() looks at the expansion bus configuration |
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* as setup by the bootloader to determine our window size. |
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*/ |
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extern unsigned long ixp4xx_exp_bus_size; |
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#define IXP4XX_EXP_BUS_BASE(region)\ |
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(IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size)) |
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#define IXP4XX_EXP_BUS_END(region)\ |
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(IXP4XX_EXP_BUS_BASE(region) + ixp4xx_exp_bus_size - 1) |
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/* Those macros can be used to adjust timing and configure |
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* other features for each region. |
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*/ |
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#define IXP4XX_EXP_BUS_RECOVERY_T(x) (((x) & 0x0f) << 16) |
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#define IXP4XX_EXP_BUS_HOLD_T(x) (((x) & 0x03) << 20) |
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#define IXP4XX_EXP_BUS_STROBE_T(x) (((x) & 0x0f) << 22) |
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#define IXP4XX_EXP_BUS_SETUP_T(x) (((x) & 0x03) << 26) |
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#define IXP4XX_EXP_BUS_ADDR_T(x) (((x) & 0x03) << 28) |
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#define IXP4XX_EXP_BUS_SIZE(x) (((x) & 0x0f) << 10) |
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#define IXP4XX_EXP_BUS_CYCLES(x) (((x) & 0x03) << 14) |
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#define IXP4XX_EXP_BUS_CS_EN (1L << 31) |
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#define IXP4XX_EXP_BUS_BYTE_RD16 (1L << 6) |
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#define IXP4XX_EXP_BUS_HRDY_POL (1L << 5) |
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#define IXP4XX_EXP_BUS_MUX_EN (1L << 4) |
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#define IXP4XX_EXP_BUS_SPLT_EN (1L << 3) |
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#define IXP4XX_EXP_BUS_WR_EN (1L << 1) |
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#define IXP4XX_EXP_BUS_BYTE_EN (1L << 0) |
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#define IXP4XX_EXP_BUS_CYCLES_INTEL 0x00 |
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#define IXP4XX_EXP_BUS_CYCLES_MOTOROLA 0x01 |
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#define IXP4XX_EXP_BUS_CYCLES_HPI 0x02 |
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#define IXP4XX_FLASH_WRITABLE (0x2) |
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#define IXP4XX_FLASH_DEFAULT (0xbcd23c40) |
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#define IXP4XX_FLASH_WRITE (0xbcd23c42) |
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/* |
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* Clock Speed Definitions. |
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*/ |
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#define IXP4XX_PERIPHERAL_BUS_CLOCK (66) /* 66MHzi APB BUS */ |
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#define IXP4XX_UART_XTAL 14745600 |
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/* |
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* This structure provide a means for the board setup code |
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* to give information to th pata_ixp4xx driver. It is |
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* passed as platform_data. |
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*/ |
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struct ixp4xx_pata_data { |
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volatile u32 *cs0_cfg; |
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volatile u32 *cs1_cfg; |
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unsigned long cs0_bits; |
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unsigned long cs1_bits; |
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void __iomem *cs0; |
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void __iomem *cs1; |
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}; |
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/* |
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* Frequency of clock used for primary clocksource |
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*/ |
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extern unsigned long ixp4xx_timer_freq; |
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/* |
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* Functions used by platform-level setup code |
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*/ |
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extern void ixp4xx_map_io(void); |
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extern void ixp4xx_init_early(void); |
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extern void ixp4xx_init_irq(void); |
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extern void ixp4xx_sys_init(void); |
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extern void ixp4xx_timer_init(void); |
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extern void ixp4xx_restart(enum reboot_mode, const char *); |
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extern void ixp4xx_pci_preinit(void); |
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struct pci_sys_data; |
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extern int ixp4xx_setup(int nr, struct pci_sys_data *sys); |
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extern struct pci_ops ixp4xx_ops; |
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#endif // __ASSEMBLY__ |
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