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//==========================================================================

//

//      iq80321_pci.c

//

//      HAL support code for IQ80321 PCI

//

//==========================================================================

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// -------------------------------------------                              

// This file is part of eCos, the Embedded Configurable Operating System.   

// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.

//

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// for more details.                                                        

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//

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//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    msalter

// Contributors: msalter

// Date:         2002-01-04

// Purpose:      PCI support

// Description:  Implementations of HAL PCI interfaces

//

//####DESCRIPTIONEND####

//

//========================================================================*/

#include <pkgconf/hal.h>

#include <pkgconf/system.h>

#include CYGBLD_HAL_PLATFORM_H

#include CYGHWR_MEMORY_LAYOUT_H

#include <cyg/infra/cyg_type.h>         // base types

#include <cyg/infra/cyg_trac.h>         // tracing macros

#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_io.h>             // IO macros

#include <cyg/hal/hal_if.h>             // calling interface API

#include <cyg/hal/hal_arch.h>           // Register state info

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/hal_intr.h>           // Interrupt names

#include <cyg/hal/hal_cache.h>

#include <cyg/io/pci_hw.h>

#include <cyg/io/pci.h>

#ifdef CYGPKG_IO_PCI

cyg_uint32 hal_pci_alloc_base_memory;

cyg_uint32 hal_pci_alloc_base_io;

cyg_uint32 hal_pci_physical_memory_base;

cyg_uint32 hal_pci_physical_io_base;

cyg_uint32 hal_pci_inbound_window_base;

cyg_uint32 hal_pci_inbound_window_mask;

//

// Verde ATU Window Usage:

//   Inbound Window 0 - Access to Verde memory mapped registers.

//   Inbound Window 1 - Used to reserve space for outbound window.

//   Inbound Window 2 - Access to SDRAM

//   Inbound Window 3 - Not used.

//

//   Direct Outbound Window - Direct mapped.

//   Outbound Translate Window 0 - Access to Inbound Window 1 PCI space

//   Outbound Translate Window 1 - Unused.

//   Outbound IO Window - Unused.

//

#ifdef CYG_HAL_STARTUP_ROM

#ifdef CYGSEM_HAL_ARM_IQ80321_CLEAR_PCI_RETRY

// state of retry bit in PCSR prior to bit being cleared at sdram scrub time.

extern int hal_pcsr_cfg_retry;

// Wait for BIOS to configure Verde PCI.

// Returns true if BIOS done, false if timeout

bool

cyg_hal_plf_wait_for_bios(void)

{

    int delay = 200;  // 20 seconds, tops

    while (delay-- > 0) {

        if (*ATU_ATUCMD & CYG_PCI_CFG_COMMAND_MEMORY)

            return true;

        hal_delay_us(100000);

    }

    return false;

}

#endif // CYGSEM_HAL_ARM_IQ80321_CLEAR_PCI_RETRY

#endif // CYG_HAL_STARTUP_ROM

void

cyg_hal_plf_pci_init(void)

{

    cyg_uint32 dram_limit = (0xFFFFFFFF - (hal_dram_size - 1)) & 0xFFFFFFC0;

    // Enable NIC through GPIO pin. This may not have an effect depending

    // on switch settings.

    *GPIO_GPOE &= ~(1 << IQ80321_GBE_GPIO_PIN);

    *GPIO_GPOD |= (1 << IQ80321_GBE_GPIO_PIN);

    hal_pci_inbound_window_mask = ~dram_limit;

    // Force BAR0 to be non-prefetchable to allow proper MU usage

    *ATU_IABAR0 &= ~CYG_PRI_CFG_BAR_MEM_PREFETCH;

#ifdef CYG_HAL_STARTUP_ROM

#ifdef CYGSEM_HAL_ARM_IQ80321_CLEAR_PCI_RETRY

    if (!hal_pcsr_cfg_retry || !cyg_hal_plf_wait_for_bios())

#endif  // CYGSEM_HAL_ARM_IQ80321_CLEAR_PCI_RETRY

    {

        // 64-bit prefetchable

        *ATU_IABAR2 = SDRAM_PHYS_BASE | \

                      CYG_PRI_CFG_BAR_MEM_TYPE_64 | \

                      CYG_PRI_CFG_BAR_MEM_PREFETCH;

        *ATU_IAUBAR2 = 0;

        // Outbound window will be set based on the memory reserved

        // by inbound window 1

        *ATU_IABAR1 = _PCI_MEM_BASE | \

                      CYG_PRI_CFG_BAR_MEM_TYPE_64 | \

                      CYG_PRI_CFG_BAR_MEM_PREFETCH;

    }

#endif  // CYG_HAL_STARTUP_ROM

    // allow ATU to act as a bus master, respond to PCI memory accesses,

    // and assert S_SERR#

    *ATU_ATUCMD = (CYG_PCI_CFG_COMMAND_SERR   | \

                   CYG_PCI_CFG_COMMAND_PARITY | \

                   CYG_PCI_CFG_COMMAND_MASTER | \

                   CYG_PCI_CFG_COMMAND_MEMORY);

    hal_pci_alloc_base_memory = *ATU_IABAR1 & CYG_PRI_CFG_BAR_MEM_MASK;

    hal_pci_alloc_base_io = _PCI_IO_BASE;

    hal_pci_inbound_window_base = *ATU_IABAR2 & CYG_PRI_CFG_BAR_MEM_MASK;

    // set the outbound window PCI address

    *ATU_OMWTVR0 = hal_pci_alloc_base_memory;

    *ATU_OUMWTVR0 = 0;

    // outbound I/O window

    *ATU_OIOWTVR = hal_pci_alloc_base_io;

    hal_pci_physical_memory_base = _PCI_MEM_BASE - hal_pci_alloc_base_memory;

    hal_pci_physical_io_base     = _PCI_IO_BASE - hal_pci_alloc_base_io;

#ifdef CYG_HAL_MEMORY_MAP_NORMAL

    // Adjust for Virt - Phys in CPU space

    hal_pci_physical_memory_base += 0x20000000;

    hal_pci_physical_io_base     += 0x20000000;

#endif

    cyg_pci_set_memory_base(HAL_PCI_ALLOC_BASE_MEMORY);

    cyg_pci_set_io_base(HAL_PCI_ALLOC_BASE_IO);

    // enable outbound ATU

    *ATU_ATUCR = 2;

    *ATU_APMCSR = 3;

}

#endif // CYGPKG_IO_PCI