1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * arch/arm/mach-ixp4xx/include/mach/platform.h 4 * 5 * Constants and functions that are useful to IXP4xx platform-specific code 6 * and device drivers. 7 * 8 * Copyright (C) 2004 MontaVista Software, Inc. 9 */ 10 11 #ifndef __ASM_ARCH_HARDWARE_H__ 12 #error "Do not include this directly, instead #include <mach/hardware.h>" 13 #endif 14 15 #ifndef __ASSEMBLY__ 16 17 #include <linux/reboot.h> 18 #include <linux/platform_data/eth_ixp4xx.h> 19 20 #include <asm/types.h> 21 22 #ifndef __ARMEB__ 23 #define REG_OFFSET 0 24 #else 25 #define REG_OFFSET 3 26 #endif 27 28 /* 29 * Expansion bus memory regions 30 */ 31 #define IXP4XX_EXP_BUS_BASE_PHYS (0x50000000) 32 33 /* 34 * The expansion bus on the IXP4xx can be configured for either 16 or 35 * 32MB windows and the CS offset for each region changes based on the 36 * current configuration. This means that we cannot simply hardcode 37 * each offset. ixp4xx_sys_init() looks at the expansion bus configuration 38 * as setup by the bootloader to determine our window size. 39 */ 40 extern unsigned long ixp4xx_exp_bus_size; 41 42 #define IXP4XX_EXP_BUS_BASE(region)\ 43 (IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size)) 44 45 #define IXP4XX_EXP_BUS_END(region)\ 46 (IXP4XX_EXP_BUS_BASE(region) + ixp4xx_exp_bus_size - 1) 47 48 /* Those macros can be used to adjust timing and configure 49 * other features for each region. 50 */ 51 52 #define IXP4XX_EXP_BUS_RECOVERY_T(x) (((x) & 0x0f) << 16) 53 #define IXP4XX_EXP_BUS_HOLD_T(x) (((x) & 0x03) << 20) 54 #define IXP4XX_EXP_BUS_STROBE_T(x) (((x) & 0x0f) << 22) 55 #define IXP4XX_EXP_BUS_SETUP_T(x) (((x) & 0x03) << 26) 56 #define IXP4XX_EXP_BUS_ADDR_T(x) (((x) & 0x03) << 28) 57 #define IXP4XX_EXP_BUS_SIZE(x) (((x) & 0x0f) << 10) 58 #define IXP4XX_EXP_BUS_CYCLES(x) (((x) & 0x03) << 14) 59 60 #define IXP4XX_EXP_BUS_CS_EN (1L << 31) 61 #define IXP4XX_EXP_BUS_BYTE_RD16 (1L << 6) 62 #define IXP4XX_EXP_BUS_HRDY_POL (1L << 5) 63 #define IXP4XX_EXP_BUS_MUX_EN (1L << 4) 64 #define IXP4XX_EXP_BUS_SPLT_EN (1L << 3) 65 #define IXP4XX_EXP_BUS_WR_EN (1L << 1) 66 #define IXP4XX_EXP_BUS_BYTE_EN (1L << 0) 67 68 #define IXP4XX_EXP_BUS_CYCLES_INTEL 0x00 69 #define IXP4XX_EXP_BUS_CYCLES_MOTOROLA 0x01 70 #define IXP4XX_EXP_BUS_CYCLES_HPI 0x02 71 72 #define IXP4XX_FLASH_WRITABLE (0x2) 73 #define IXP4XX_FLASH_DEFAULT (0xbcd23c40) 74 #define IXP4XX_FLASH_WRITE (0xbcd23c42) 75 76 /* 77 * Clock Speed Definitions. 78 */ 79 #define IXP4XX_PERIPHERAL_BUS_CLOCK (66) /* 66MHzi APB BUS */ 80 #define IXP4XX_UART_XTAL 14745600 81 82 /* 83 * This structure provide a means for the board setup code 84 * to give information to th pata_ixp4xx driver. It is 85 * passed as platform_data. 86 */ 87 struct ixp4xx_pata_data { 88 volatile u32 *cs0_cfg; 89 volatile u32 *cs1_cfg; 90 unsigned long cs0_bits; 91 unsigned long cs1_bits; 92 void __iomem *cs0; 93 void __iomem *cs1; 94 }; 95 96 /* 97 * Frequency of clock used for primary clocksource 98 */ 99 extern unsigned long ixp4xx_timer_freq; 100 101 /* 102 * Functions used by platform-level setup code 103 */ 104 extern void ixp4xx_map_io(void); 105 extern void ixp4xx_init_early(void); 106 extern void ixp4xx_init_irq(void); 107 extern void ixp4xx_sys_init(void); 108 extern void ixp4xx_timer_init(void); 109 extern void ixp4xx_restart(enum reboot_mode, const char *); 110 extern void ixp4xx_pci_preinit(void); 111 struct pci_sys_data; 112 extern int ixp4xx_setup(int nr, struct pci_sys_data *sys); 113 extern struct pci_ops ixp4xx_ops; 114 115 #endif // __ASSEMBLY__ 116 117