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
  19#include <asm/types.h>
  20
  21#ifndef __ARMEB__
  22#define REG_OFFSET      0
  23#else
  24#define REG_OFFSET      3
  25#endif
  26
  27/*
  28 * Expansion bus memory regions
  29 */
  30#define IXP4XX_EXP_BUS_BASE_PHYS        (0x50000000)
  31
  32/*
  33 * The expansion bus on the IXP4xx can be configured for either 16 or
  34 * 32MB windows and the CS offset for each region changes based on the
  35 * current configuration. This means that we cannot simply hardcode
  36 * each offset. ixp4xx_sys_init() looks at the expansion bus configuration
  37 * as setup by the bootloader to determine our window size.
  38 */
  39extern unsigned long ixp4xx_exp_bus_size;
  40
  41#define IXP4XX_EXP_BUS_BASE(region)\
  42                (IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size))
  43
  44#define IXP4XX_EXP_BUS_END(region)\
  45                (IXP4XX_EXP_BUS_BASE(region) + ixp4xx_exp_bus_size - 1)
  46
  47/* Those macros can be used to adjust timing and configure
  48 * other features for each region.
  49 */
  50
  51#define IXP4XX_EXP_BUS_RECOVERY_T(x)    (((x) & 0x0f) << 16)
  52#define IXP4XX_EXP_BUS_HOLD_T(x)        (((x) & 0x03) << 20)
  53#define IXP4XX_EXP_BUS_STROBE_T(x)      (((x) & 0x0f) << 22)
  54#define IXP4XX_EXP_BUS_SETUP_T(x)       (((x) & 0x03) << 26)
  55#define IXP4XX_EXP_BUS_ADDR_T(x)        (((x) & 0x03) << 28)
  56#define IXP4XX_EXP_BUS_SIZE(x)          (((x) & 0x0f) << 10)
  57#define IXP4XX_EXP_BUS_CYCLES(x)        (((x) & 0x03) << 14)
  58
  59#define IXP4XX_EXP_BUS_CS_EN            (1L << 31)
  60#define IXP4XX_EXP_BUS_BYTE_RD16        (1L << 6)
  61#define IXP4XX_EXP_BUS_HRDY_POL         (1L << 5)
  62#define IXP4XX_EXP_BUS_MUX_EN           (1L << 4)
  63#define IXP4XX_EXP_BUS_SPLT_EN          (1L << 3)
  64#define IXP4XX_EXP_BUS_WR_EN            (1L << 1)
  65#define IXP4XX_EXP_BUS_BYTE_EN          (1L << 0)
  66
  67#define IXP4XX_EXP_BUS_CYCLES_INTEL     0x00
  68#define IXP4XX_EXP_BUS_CYCLES_MOTOROLA  0x01
  69#define IXP4XX_EXP_BUS_CYCLES_HPI       0x02
  70
  71#define IXP4XX_FLASH_WRITABLE   (0x2)
  72#define IXP4XX_FLASH_DEFAULT    (0xbcd23c40)
  73#define IXP4XX_FLASH_WRITE      (0xbcd23c42)
  74
  75/*
  76 * Clock Speed Definitions.
  77 */
  78#define IXP4XX_PERIPHERAL_BUS_CLOCK     (66) /* 66MHzi APB BUS   */ 
  79#define IXP4XX_UART_XTAL                14745600
  80
  81/*
  82 * This structure provide a means for the board setup code
  83 * to give information to th pata_ixp4xx driver. It is
  84 * passed as platform_data.
  85 */
  86struct ixp4xx_pata_data {
  87        volatile u32    *cs0_cfg;
  88        volatile u32    *cs1_cfg;
  89        unsigned long   cs0_bits;
  90        unsigned long   cs1_bits;
  91        void __iomem    *cs0;
  92        void __iomem    *cs1;
  93};
  94
  95#define IXP4XX_ETH_NPEA         0x00
  96#define IXP4XX_ETH_NPEB         0x10
  97#define IXP4XX_ETH_NPEC         0x20
  98
  99/* Information about built-in Ethernet MAC interfaces */
 100struct eth_plat_info {
 101        u8 phy;         /* MII PHY ID, 0 - 31 */
 102        u8 rxq;         /* configurable, currently 0 - 31 only */
 103        u8 txreadyq;
 104        u8 hwaddr[6];
 105};
 106
 107/* Information about built-in HSS (synchronous serial) interfaces */
 108struct hss_plat_info {
 109        int (*set_clock)(int port, unsigned int clock_type);
 110        int (*open)(int port, void *pdev,
 111                    void (*set_carrier_cb)(void *pdev, int carrier));
 112        void (*close)(int port, void *pdev);
 113        u8 txreadyq;
 114};
 115
 116/*
 117 * Frequency of clock used for primary clocksource
 118 */
 119extern unsigned long ixp4xx_timer_freq;
 120
 121/*
 122 * Functions used by platform-level setup code
 123 */
 124extern void ixp4xx_map_io(void);
 125extern void ixp4xx_init_early(void);
 126extern void ixp4xx_init_irq(void);
 127extern void ixp4xx_sys_init(void);
 128extern void ixp4xx_timer_init(void);
 129extern void ixp4xx_restart(enum reboot_mode, const char *);
 130extern void ixp4xx_pci_preinit(void);
 131struct pci_sys_data;
 132extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
 133extern struct pci_ops ixp4xx_ops;
 134
 135#endif // __ASSEMBLY__
 136
 137