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platform.h

/*
 * arch/arm/mach-ixp4xx/include/mach/platform.h
 *
 * Constants and functions that are useful to IXP4xx platform-specific code
 * and device drivers.
 *
 * Copyright (C) 2004 MontaVista Software, Inc.
 */

#ifndef __ASM_ARCH_HARDWARE_H__
#error "Do not include this directly, instead #include <mach/hardware.h>"
#endif

#ifndef __ASSEMBLY__

#include <asm/types.h>

#ifndef     __ARMEB__
#define     REG_OFFSET  0
#else
#define     REG_OFFSET  3
#endif

/*
 * Expansion bus memory regions
 */
#define IXP4XX_EXP_BUS_BASE_PHYS    (0x50000000)

/*
 * The expansion bus on the IXP4xx can be configured for either 16 or
 * 32MB windows and the CS offset for each region changes based on the
 * current configuration. This means that we cannot simply hardcode
 * each offset. ixp4xx_sys_init() looks at the expansion bus configuration
 * as setup by the bootloader to determine our window size.
 */
extern unsigned long ixp4xx_exp_bus_size;

#define     IXP4XX_EXP_BUS_BASE(region)\
            (IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size))

#define IXP4XX_EXP_BUS_END(region)\
            (IXP4XX_EXP_BUS_BASE(region) + ixp4xx_exp_bus_size - 1)

/* Those macros can be used to adjust timing and configure
 * other features for each region.
 */

#define IXP4XX_EXP_BUS_RECOVERY_T(x)      (((x) & 0x0f) << 16)
#define IXP4XX_EXP_BUS_HOLD_T(x)    (((x) & 0x03) << 20)
#define IXP4XX_EXP_BUS_STROBE_T(x)  (((x) & 0x0f) << 22)
#define IXP4XX_EXP_BUS_SETUP_T(x)   (((x) & 0x03) << 26)
#define IXP4XX_EXP_BUS_ADDR_T(x)    (((x) & 0x03) << 28)
#define IXP4XX_EXP_BUS_SIZE(x)            (((x) & 0x0f) << 10)
#define IXP4XX_EXP_BUS_CYCLES(x)    (((x) & 0x03) << 14)

#define IXP4XX_EXP_BUS_CS_EN        (1L << 31)
#define IXP4XX_EXP_BUS_BYTE_RD16    (1L << 6)
#define IXP4XX_EXP_BUS_HRDY_POL           (1L << 5)
#define IXP4XX_EXP_BUS_MUX_EN       (1L << 4)
#define IXP4XX_EXP_BUS_SPLT_EN            (1L << 3)
#define IXP4XX_EXP_BUS_WR_EN        (1L << 1)
#define IXP4XX_EXP_BUS_BYTE_EN            (1L << 0)

#define IXP4XX_EXP_BUS_CYCLES_INTEL 0x00
#define IXP4XX_EXP_BUS_CYCLES_MOTOROLA    0x01
#define IXP4XX_EXP_BUS_CYCLES_HPI   0x02

#define IXP4XX_FLASH_WRITABLE (0x2)
#define IXP4XX_FLASH_DEFAULT  (0xbcd23c40)
#define IXP4XX_FLASH_WRITE    (0xbcd23c42)

/*
 * Clock Speed Definitions.
 */
#define IXP4XX_PERIPHERAL_BUS_CLOCK       (66) /* 66Mhzi APB BUS   */ 
#define IXP4XX_UART_XTAL            14745600

/*
 * This structure provide a means for the board setup code
 * to give information to th pata_ixp4xx driver. It is
 * passed as platform_data.
 */
00083 struct ixp4xx_pata_data {
      volatile u32      *cs0_cfg;
      volatile u32      *cs1_cfg;
      unsigned long     cs0_bits;
      unsigned long     cs1_bits;
      void __iomem      *cs0;
      void __iomem      *cs1;
};

struct sys_timer;

#define IXP4XX_ETH_NPEA       0x00
#define IXP4XX_ETH_NPEB       0x10
#define IXP4XX_ETH_NPEC       0x20

/* Information about built-in Ethernet MAC interfaces */
00099 struct eth_plat_info {
      u8 phy;           /* MII PHY ID, 0 - 31 */
      u8 rxq;           /* configurable, currently 0 - 31 only */
      u8 txreadyq;
      u8 hwaddr[6];
};

/* Information about built-in HSS (synchronous serial) interfaces */
00107 struct hss_plat_info {
      int (*set_clock)(int port, unsigned int clock_type);
      int (*open)(int port, void *pdev,
                void (*set_carrier_cb)(void *pdev, int carrier));
      void (*close)(int port, void *pdev);
      u8 txreadyq;
};

/*
 * Frequency of clock used for primary clocksource
 */
extern unsigned long ixp4xx_timer_freq;

/*
 * Functions used by platform-level setup code
 */
extern void ixp4xx_map_io(void);
extern void ixp4xx_init_irq(void);
extern void ixp4xx_sys_init(void);
extern void ixp4xx_timer_init(void);
extern struct sys_timer ixp4xx_timer;
extern void ixp4xx_pci_preinit(void);
struct pci_sys_data;
extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);

/*
 * GPIO-functions
 */
/*
 * The following converted to the real HW bits the gpio_line_config
 */
/* GPIO pin types */
#define IXP4XX_GPIO_OUT             0x1
#define IXP4XX_GPIO_IN              0x2

/* GPIO signal types */
#define IXP4XX_GPIO_LOW             0
#define IXP4XX_GPIO_HIGH            1

/* GPIO Clocks */
#define IXP4XX_GPIO_CLK_0           14
#define IXP4XX_GPIO_CLK_1           15

static inline void gpio_line_config(u8 line, u32 direction)
{
      if (direction == IXP4XX_GPIO_IN)
            *IXP4XX_GPIO_GPOER |= (1 << line);
      else
            *IXP4XX_GPIO_GPOER &= ~(1 << line);
}

static inline void gpio_line_get(u8 line, int *value)
{
      *value = (*IXP4XX_GPIO_GPINR >> line) & 0x1;
}

static inline void gpio_line_set(u8 line, int value)
{
      if (value == IXP4XX_GPIO_HIGH)
          *IXP4XX_GPIO_GPOUTR |= (1 << line);
      else if (value == IXP4XX_GPIO_LOW)
          *IXP4XX_GPIO_GPOUTR &= ~(1 << line);
}

#endif // __ASSEMBLY__


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