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

   1/*
   2 * arch/arm/mach-ixp4xx/include/mach/platform.h
   3 *
   4 * Constants and functions that are useful to IXP4xx platform-specific code
   5 * and device drivers.
   6 *
   7 * Copyright (C) 2004 MontaVista Software, Inc.
   8 */
   9
  10#ifndef __ASM_ARCH_HARDWARE_H__
  11#error "Do not include this directly, instead #include <mach/hardware.h>"
  12#endif
  13
  14#ifndef __ASSEMBLY__
  15
  16#include <linux/reboot.h>
  17
  18#include <asm/types.h>
  19
  20#ifndef __ARMEB__
  21#define REG_OFFSET      0
  22#else
  23#define REG_OFFSET      3
  24#endif
  25
  26/*
  27 * Expansion bus memory regions
  28 */
  29#define IXP4XX_EXP_BUS_BASE_PHYS        (0x50000000)
  30
  31/*
  32 * The expansion bus on the IXP4xx can be configured for either 16 or
  33 * 32MB windows and the CS offset for each region changes based on the
  34 * current configuration. This means that we cannot simply hardcode
  35 * each offset. ixp4xx_sys_init() looks at the expansion bus configuration
  36 * as setup by the bootloader to determine our window size.
  37 */
  38extern unsigned long ixp4xx_exp_bus_size;
  39
  40#define IXP4XX_EXP_BUS_BASE(region)\
  41                (IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size))
  42
  43#define IXP4XX_EXP_BUS_END(region)\
  44                (IXP4XX_EXP_BUS_BASE(region) + ixp4xx_exp_bus_size - 1)
  45
  46/* Those macros can be used to adjust timing and configure
  47 * other features for each region.
  48 */
  49
  50#define IXP4XX_EXP_BUS_RECOVERY_T(x)    (((x) & 0x0f) << 16)
  51#define IXP4XX_EXP_BUS_HOLD_T(x)        (((x) & 0x03) << 20)
  52#define IXP4XX_EXP_BUS_STROBE_T(x)      (((x) & 0x0f) << 22)
  53#define IXP4XX_EXP_BUS_SETUP_T(x)       (((x) & 0x03) << 26)
  54#define IXP4XX_EXP_BUS_ADDR_T(x)        (((x) & 0x03) << 28)
  55#define IXP4XX_EXP_BUS_SIZE(x)          (((x) & 0x0f) << 10)
  56#define IXP4XX_EXP_BUS_CYCLES(x)        (((x) & 0x03) << 14)
  57
  58#define IXP4XX_EXP_BUS_CS_EN            (1L << 31)
  59#define IXP4XX_EXP_BUS_BYTE_RD16        (1L << 6)
  60#define IXP4XX_EXP_BUS_HRDY_POL         (1L << 5)
  61#define IXP4XX_EXP_BUS_MUX_EN           (1L << 4)
  62#define IXP4XX_EXP_BUS_SPLT_EN          (1L << 3)
  63#define IXP4XX_EXP_BUS_WR_EN            (1L << 1)
  64#define IXP4XX_EXP_BUS_BYTE_EN          (1L << 0)
  65
  66#define IXP4XX_EXP_BUS_CYCLES_INTEL     0x00
  67#define IXP4XX_EXP_BUS_CYCLES_MOTOROLA  0x01
  68#define IXP4XX_EXP_BUS_CYCLES_HPI       0x02
  69
  70#define IXP4XX_FLASH_WRITABLE   (0x2)
  71#define IXP4XX_FLASH_DEFAULT    (0xbcd23c40)
  72#define IXP4XX_FLASH_WRITE      (0xbcd23c42)
  73
  74/*
  75 * Clock Speed Definitions.
  76 */
  77#define IXP4XX_PERIPHERAL_BUS_CLOCK     (66) /* 66MHzi APB BUS   */ 
  78#define IXP4XX_UART_XTAL                14745600
  79
  80/*
  81 * This structure provide a means for the board setup code
  82 * to give information to th pata_ixp4xx driver. It is
  83 * passed as platform_data.
  84 */
  85struct ixp4xx_pata_data {
  86        volatile u32    *cs0_cfg;
  87        volatile u32    *cs1_cfg;
  88        unsigned long   cs0_bits;
  89        unsigned long   cs1_bits;
  90        void __iomem    *cs0;
  91        void __iomem    *cs1;
  92};
  93
  94#define IXP4XX_ETH_NPEA         0x00
  95#define IXP4XX_ETH_NPEB         0x10
  96#define IXP4XX_ETH_NPEC         0x20
  97
  98/* Information about built-in Ethernet MAC interfaces */
  99struct eth_plat_info {
 100        u8 phy;         /* MII PHY ID, 0 - 31 */
 101        u8 rxq;         /* configurable, currently 0 - 31 only */
 102        u8 txreadyq;
 103        u8 hwaddr[6];
 104};
 105
 106/* Information about built-in HSS (synchronous serial) interfaces */
 107struct hss_plat_info {
 108        int (*set_clock)(int port, unsigned int clock_type);
 109        int (*open)(int port, void *pdev,
 110                    void (*set_carrier_cb)(void *pdev, int carrier));
 111        void (*close)(int port, void *pdev);
 112        u8 txreadyq;
 113};
 114
 115/*
 116 * Frequency of clock used for primary clocksource
 117 */
 118extern unsigned long ixp4xx_timer_freq;
 119
 120/*
 121 * Functions used by platform-level setup code
 122 */
 123extern void ixp4xx_map_io(void);
 124extern void ixp4xx_init_early(void);
 125extern void ixp4xx_init_irq(void);
 126extern void ixp4xx_sys_init(void);
 127extern void ixp4xx_timer_init(void);
 128extern void ixp4xx_restart(enum reboot_mode, const char *);
 129extern void ixp4xx_pci_preinit(void);
 130struct pci_sys_data;
 131extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
 132extern struct pci_ops ixp4xx_ops;
 133
 134#endif // __ASSEMBLY__
 135
 136