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  */
  38 extern 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  */
  85 struct 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 */
  99 struct 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 */
 107 struct 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  */
 118 extern unsigned long ixp4xx_timer_freq;
 119
 120 /*
 121  * Functions used by platform-level setup code
 122  */
 123 extern void ixp4xx_map_io(void);
 124 extern void ixp4xx_init_early(void);
 125 extern void ixp4xx_init_irq(void);
 126 extern void ixp4xx_sys_init(void);
 127 extern void ixp4xx_timer_init(void);
 128 extern void ixp4xx_restart(enum reboot_mode, const char *);
 129 extern void ixp4xx_pci_preinit(void);
 130 struct pci_sys_data;
 131 extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
 132 extern struct pci_ops ixp4xx_ops;
 133
 134 #endif // __ASSEMBLY__
 135