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 <asm/types.h>
  17
  18#ifndef __ARMEB__
  19#define REG_OFFSET      0
  20#else
  21#define REG_OFFSET      3
  22#endif
  23
  24/*
  25 * Expansion bus memory regions
  26 */
  27#define IXP4XX_EXP_BUS_BASE_PHYS        (0x50000000)
  28
  29/*
  30 * The expansion bus on the IXP4xx can be configured for either 16 or
  31 * 32MB windows and the CS offset for each region changes based on the
  32 * current configuration. This means that we cannot simply hardcode
  33 * each offset. ixp4xx_sys_init() looks at the expansion bus configuration
  34 * as setup by the bootloader to determine our window size.
  35 */
  36extern unsigned long ixp4xx_exp_bus_size;
  37
  38#define IXP4XX_EXP_BUS_BASE(region)\
  39                (IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size))
  40
  41#define IXP4XX_EXP_BUS_END(region)\
  42                (IXP4XX_EXP_BUS_BASE(region) + ixp4xx_exp_bus_size - 1)
  43
  44/* Those macros can be used to adjust timing and configure
  45 * other features for each region.
  46 */
  47
  48#define IXP4XX_EXP_BUS_RECOVERY_T(x)    (((x) & 0x0f) << 16)
  49#define IXP4XX_EXP_BUS_HOLD_T(x)        (((x) & 0x03) << 20)
  50#define IXP4XX_EXP_BUS_STROBE_T(x)      (((x) & 0x0f) << 22)
  51#define IXP4XX_EXP_BUS_SETUP_T(x)       (((x) & 0x03) << 26)
  52#define IXP4XX_EXP_BUS_ADDR_T(x)        (((x) & 0x03) << 28)
  53#define IXP4XX_EXP_BUS_SIZE(x)          (((x) & 0x0f) << 10)
  54#define IXP4XX_EXP_BUS_CYCLES(x)        (((x) & 0x03) << 14)
  55
  56#define IXP4XX_EXP_BUS_CS_EN            (1L << 31)
  57#define IXP4XX_EXP_BUS_BYTE_RD16        (1L << 6)
  58#define IXP4XX_EXP_BUS_HRDY_POL         (1L << 5)
  59#define IXP4XX_EXP_BUS_MUX_EN           (1L << 4)
  60#define IXP4XX_EXP_BUS_SPLT_EN          (1L << 3)
  61#define IXP4XX_EXP_BUS_WR_EN            (1L << 1)
  62#define IXP4XX_EXP_BUS_BYTE_EN          (1L << 0)
  63
  64#define IXP4XX_EXP_BUS_CYCLES_INTEL     0x00
  65#define IXP4XX_EXP_BUS_CYCLES_MOTOROLA  0x01
  66#define IXP4XX_EXP_BUS_CYCLES_HPI       0x02
  67
  68#define IXP4XX_FLASH_WRITABLE   (0x2)
  69#define IXP4XX_FLASH_DEFAULT    (0xbcd23c40)
  70#define IXP4XX_FLASH_WRITE      (0xbcd23c42)
  71
  72/*
  73 * Clock Speed Definitions.
  74 */
  75#define IXP4XX_PERIPHERAL_BUS_CLOCK     (66) /* 66Mhzi APB BUS   */ 
  76#define IXP4XX_UART_XTAL                14745600
  77
  78/*
  79 * This structure provide a means for the board setup code
  80 * to give information to th pata_ixp4xx driver. It is
  81 * passed as platform_data.
  82 */
  83struct ixp4xx_pata_data {
  84        volatile u32    *cs0_cfg;
  85        volatile u32    *cs1_cfg;
  86        unsigned long   cs0_bits;
  87        unsigned long   cs1_bits;
  88        void __iomem    *cs0;
  89        void __iomem    *cs1;
  90};
  91
  92struct sys_timer;
  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_irq(void);
 125extern void ixp4xx_sys_init(void);
 126extern void ixp4xx_timer_init(void);
 127extern struct sys_timer ixp4xx_timer;
 128extern void ixp4xx_restart(char, 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_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
 133
 134/*
 135 * GPIO-functions
 136 */
 137/*
 138 * The following converted to the real HW bits the gpio_line_config
 139 */
 140/* GPIO pin types */
 141#define IXP4XX_GPIO_OUT                 0x1
 142#define IXP4XX_GPIO_IN                  0x2
 143
 144/* GPIO signal types */
 145#define IXP4XX_GPIO_LOW                 0
 146#define IXP4XX_GPIO_HIGH                1
 147
 148/* GPIO Clocks */
 149#define IXP4XX_GPIO_CLK_0               14
 150#define IXP4XX_GPIO_CLK_1               15
 151
 152static inline void gpio_line_config(u8 line, u32 direction)
 153{
 154        if (direction == IXP4XX_GPIO_IN)
 155                *IXP4XX_GPIO_GPOER |= (1 << line);
 156        else
 157                *IXP4XX_GPIO_GPOER &= ~(1 << line);
 158}
 159
 160static inline void gpio_line_get(u8 line, int *value)
 161{
 162        *value = (*IXP4XX_GPIO_GPINR >> line) & 0x1;
 163}
 164
 165static inline void gpio_line_set(u8 line, int value)
 166{
 167        if (value == IXP4XX_GPIO_HIGH)
 168            *IXP4XX_GPIO_GPOUTR |= (1 << line);
 169        else if (value == IXP4XX_GPIO_LOW)
 170            *IXP4XX_GPIO_GPOUTR &= ~(1 << line);
 171}
 172
 173#endif // __ASSEMBLY__
 174
 175