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  */
  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