LXR linux/arch/arm/mach-ixp4xx/include/mach/platform.h

   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 */
  40extern 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 * Frequency of clock used for primary clocksource
  84 */
  85extern unsigned long ixp4xx_timer_freq;
  86
  87/*
  88 * Functions used by platform-level setup code
  89 */
  90extern void ixp4xx_map_io(void);
  91extern void ixp4xx_init_early(void);
  92extern void ixp4xx_init_irq(void);
  93extern void ixp4xx_sys_init(void);
  94extern void ixp4xx_timer_init(void);
  95extern void ixp4xx_restart(enum reboot_mode, const char *);
  96extern void ixp4xx_pci_preinit(void);
  97struct pci_sys_data;
  98extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
  99extern struct pci_ops ixp4xx_ops;
 100
 101#endif // __ASSEMBLY__
 102
 103