u-boot/board/amirix/ap1000/pci.c

/*
 * (C) Copyright 2003
 * AMIRIX Systems Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <ppc4xx.h>
#include <asm/processor.h>
#include <pci.h>

#define PCI_MEM_82559ER_CSR_BASE    0x30200000
#define PCI_IO_82559ER_CSR_BASE     0x40000200

/** AP1100 specific values */
#define PSII_BASE                   0x30000000    /**< PowerSpan II dual bridge local bus register address */
#define PSII_CONFIG_ADDR            0x30000290    /**< PowerSpan II Configuration Cycle Address configuration register */
#define PSII_CONFIG_DATA            0x30000294    /**< PowerSpan II Configuration Cycle Data register. */
#define PSII_CONFIG_DEST_PCI2       0x01000000    /**< PowerSpan II configuration cycle destination selection, set for PCI2 bus */
#define PSII_PCI_MEM_BASE           0x30200000    /**< Local Bus address for start of PCI memory space on PCI2 bus. */
#define PSII_PCI_MEM_SIZE           0x1BE00000    /**< PCI Memory space about 510 Meg. */
#define AP1000_SYS_MEM_START        0x00000000    /**< System memory starts at 0. */
#define AP1000_SYS_MEM_SIZE         0x08000000    /**< System memory is 128 Meg. */

/* static int G_verbosity_level = 1; */
#define G_verbosity_level 1

void write1(unsigned long addr, unsigned char val) {
    volatile unsigned char* p = (volatile unsigned char*)addr;

    if(G_verbosity_level > 1)
        printf("write1: addr=%08x val=%02x\n", (unsigned int)addr, val);
    *p = val;
    asm("eieio");
}

unsigned char read1(unsigned long addr) {
    unsigned char val;
    volatile unsigned char* p = (volatile unsigned char*)addr;

    if(G_verbosity_level > 1)
        printf("read1: addr=%08x ", (unsigned int)addr);
    val = *p;
    asm("eieio");
    if(G_verbosity_level > 1)
        printf("val=%08x\n", val);
    return val;
}

void write2(unsigned long addr, unsigned short val) {
    volatile unsigned short* p = (volatile unsigned short*)addr;

    if(G_verbosity_level > 1)
        printf("write2: addr=%08x val=%04x -> *p=%04x\n", (unsigned int)addr, val,
                ((val & 0xFF00) >> 8) | ((val & 0x00FF) << 8));

    *p = ((val & 0xFF00) >> 8) | ((val & 0x00FF) << 8);
    asm("eieio");
}

unsigned short read2(unsigned long addr) {
    unsigned short val;
    volatile unsigned short* p = (volatile unsigned short*)addr;

    if(G_verbosity_level > 1)
        printf("read2: addr=%08x ", (unsigned int)addr);
    val = *p;
    val = ((val & 0xFF00) >> 8) | ((val & 0x00FF) << 8);
    asm("eieio");
    if(G_verbosity_level > 1)
        printf("*p=%04x -> val=%04x\n",
            ((val & 0xFF00) >> 8) | ((val & 0x00FF) << 8), val);
    return val;
}

void write4(unsigned long addr, unsigned long val) {
    volatile unsigned long* p = (volatile unsigned long*)addr;

    if(G_verbosity_level > 1)
        printf("write4: addr=%08x val=%08x -> *p=%08x\n", (unsigned int)addr, (unsigned int)val,
            (unsigned int)(((val & 0xFF000000) >> 24) | ((val & 0x000000FF) << 24) |
            ((val & 0x00FF0000) >> 8)  | ((val & 0x0000FF00) << 8)));

    *p = ((val & 0xFF000000) >> 24) | ((val & 0x000000FF) << 24) |
         ((val & 0x00FF0000) >> 8)  | ((val & 0x0000FF00) << 8);
    asm("eieio");
}

unsigned long read4(unsigned long addr) {
    unsigned long val;
    volatile unsigned long* p = (volatile unsigned long*)addr;

    if(G_verbosity_level > 1)
        printf("read4: addr=%08x", (unsigned int)addr);

    val = *p;
    val = ((val & 0xFF000000) >> 24) | ((val & 0x000000FF) << 24) |
          ((val & 0x00FF0000) >> 8)  | ((val & 0x0000FF00) << 8);
    asm("eieio");

    if(G_verbosity_level > 1)
        printf("*p=%04x -> val=%04x\n",
            (unsigned int)(((val & 0xFF000000) >> 24) | ((val & 0x000000FF) << 24) |
            ((val & 0x00FF0000) >> 8)  | ((val & 0x0000FF00) << 8)), (unsigned int)val);
    return val;
}

void write4be(unsigned long addr, unsigned long val) {
    volatile unsigned long* p = (volatile unsigned long*)addr;

    if(G_verbosity_level > 1)
        printf("write4: addr=%08x val=%08x\n", (unsigned int)addr, (unsigned int)val);
    *p = val;
    asm("eieio");
}

/** One byte configuration write on PSII.
 *  Currently fixes destination PCI bus to PCI2, onboard
 *  pci.
 *  @param    hose    PCI Host controller information. Ignored.
 *  @param    dev        Encoded PCI device/Bus and Function value.
 *  @param    reg        PCI Configuration register number.
 *  @param    val        Address of location for received byte.
 *  @return Always Zero.
 */
static int psII_read_config_byte(
                    struct    pci_controller *hose,
                    pci_dev_t                dev,
                    int                      reg,
                    u8                       *val)
{
    write4be(PSII_CONFIG_ADDR,
            PSII_CONFIG_DEST_PCI2 |  /* Operate on PCI2 bus interface . */
            (PCI_BUS(dev) << 16) |
            (PCI_DEV(dev) << 11) |
            (PCI_FUNC(dev) << 8) |
            ((reg & 0xFF) & ~3));  /* Configuation cycle type 0 */

    *val = read1(PSII_CONFIG_DATA+(reg&0x03));
    return(0);
}

/** One byte configuration write on PSII.
 *  Currently fixes destination bus to PCI2, onboard
 *  pci.
 *  @param    hose    PCI Host controller information. Ignored.
 *  @param    dev        Encoded PCI device/Bus and Function value.
 *  @param    reg        PCI Configuration register number.
 *  @param    val        Output byte.
 *  @return Always Zero.
 */
static int psII_write_config_byte(
                  struct    pci_controller    *hose,
                  pci_dev_t                    dev,
                  int                        reg,
                  u8                        val)
{
    write4be(PSII_CONFIG_ADDR,
            PSII_CONFIG_DEST_PCI2 |  /* Operate on PCI2 bus interface . */
            (PCI_BUS(dev) << 16) |
            (PCI_DEV(dev) << 11) |
            (PCI_FUNC(dev) << 8) |
            ((reg & 0xFF) & ~3));  /* Configuation cycle type 0 */

    write1(PSII_CONFIG_DATA+(reg&0x03),(unsigned char )val);

    return(0);
}

/** One word (16 bit) configuration read on PSII.
 *  Currently fixes destination PCI bus to PCI2, onboard
 *  pci.
 *  @param    hose    PCI Host controller information. Ignored.
 *  @param    dev        Encoded PCI device/Bus and Function value.
 *  @param    reg        PCI Configuration register number.
 *  @param    val        Address of location for received word.
 *  @return Always Zero.
 */
static int psII_read_config_word(
                    struct    pci_controller    *hose,
                    pci_dev_t                dev,
                    int                        reg,
                    u16                        *val)
{
    write4be(PSII_CONFIG_ADDR,
            PSII_CONFIG_DEST_PCI2 |  /* Operate on PCI2 bus interface . */
            (PCI_BUS(dev) << 16) |
            (PCI_DEV(dev) << 11) |
            (PCI_FUNC(dev) << 8) |
            ((reg & 0xFF) & ~3));  /* Configuation cycle type 0 */

    *val = read2(PSII_CONFIG_DATA+(reg&0x03));
    return(0);
}

/** One word (16 bit) configuration write on PSII.
 *  Currently fixes destination bus to PCI2, onboard
 *  pci.
 *  @param    hose    PCI Host controller information. Ignored.
 *  @param    dev        Encoded PCI device/Bus and Function value.
 *  @param    reg        PCI Configuration register number.
 *  @param    val        Output word.
 *  @return Always Zero.
 */
static int psII_write_config_word(
                  struct    pci_controller    *hose,
                  pci_dev_t                    dev,
                  int                        reg,
                  u16                        val)
{
    write4be(PSII_CONFIG_ADDR,
            PSII_CONFIG_DEST_PCI2 |  /* Operate on PCI2 bus interface . */
            (PCI_BUS(dev) << 16) |
            (PCI_DEV(dev) << 11) |
            (PCI_FUNC(dev) << 8) |
            ((reg & 0xFF) & ~3));  /* Configuation cycle type 0 */

    write2(PSII_CONFIG_DATA+(reg&0x03),(unsigned short )val);

    return(0);
}

/** One DWord (32 bit) configuration read on PSII.
 *  Currently fixes destination PCI bus to PCI2, onboard
 *  pci.
 *  @param    hose    PCI Host controller information. Ignored.
 *  @param    dev        Encoded PCI device/Bus and Function value.
 *  @param    reg        PCI Configuration register number.
 *  @param    val        Address of location for received byte.
 *  @return Always Zero.
 */
static int psII_read_config_dword(
                    struct    pci_controller    *hose,
                    pci_dev_t                dev,
                    int                        reg,
                    u32                        *val)
{
    write4be(PSII_CONFIG_ADDR,
            PSII_CONFIG_DEST_PCI2 |  /* Operate on PCI2 bus interface . */
            (PCI_BUS(dev) << 16) |
            (PCI_DEV(dev) << 11) |
            (PCI_FUNC(dev) << 8) |
            ((reg & 0xFF) & ~3));  /* Configuation cycle type 0 */

    *val = read4(PSII_CONFIG_DATA);
    return(0);
}

/** One DWord (32 bit) configuration write on PSII.
 *  Currently fixes destination bus to PCI2, onboard
 *  pci.
 *  @param    hose    PCI Host controller information. Ignored.
 *  @param    dev        Encoded PCI device/Bus and Function value.
 *  @param    reg        PCI Configuration register number.
 *  @param    val        Output Dword.
 *  @return Always Zero.
 */
static int psII_write_config_dword(
                  struct    pci_controller    *hose,
                  pci_dev_t                    dev,
                  int                        reg,
                  u32                        val)
{
    write4be(PSII_CONFIG_ADDR,
            PSII_CONFIG_DEST_PCI2 |  /* Operate on PCI2 bus interface . */
            (PCI_BUS(dev) << 16) |
            (PCI_DEV(dev) << 11) |
            (PCI_FUNC(dev) << 8) |
            ((reg & 0xFF) & ~3));  /* Configuation cycle type 0 */

    write4(PSII_CONFIG_DATA,(unsigned long)val);

    return(0);
}



static struct pci_config_table    ap1000_config_table[] = {
#ifdef CONFIG_AP1000
    {PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
    PCI_BUS(CFG_ETH_DEV_FN), PCI_DEV(CFG_ETH_DEV_FN), PCI_FUNC(CFG_ETH_DEV_FN),
    pci_cfgfunc_config_device, 
    {CFG_ETH_IOBASE, CFG_ETH_MEMBASE, PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER }},
#endif
    { }
};


static struct pci_controller psII_hose = {
    config_table: ap1000_config_table,
};

void pci_init_board(void)
{
  struct pci_controller *hose = &psII_hose;

  /*
   * Register the hose
   */
  hose->first_busno = 0;
  hose->last_busno = 0xff;


  /* System memory space */
  pci_set_region(hose->regions + 0,
         AP1000_SYS_MEM_START, AP1000_SYS_MEM_START, AP1000_SYS_MEM_SIZE,
         PCI_REGION_MEM | PCI_REGION_MEMORY);

  /* PCI Memory space */
  pci_set_region(hose->regions + 1,
         PSII_PCI_MEM_BASE, PSII_PCI_MEM_BASE, PSII_PCI_MEM_SIZE,
         PCI_REGION_MEM);

  /* No IO Memory space  - for now */

  pci_set_ops(hose,
          psII_read_config_byte,
          psII_read_config_word,
          psII_read_config_dword,
          psII_write_config_byte,
          psII_write_config_word,
          psII_write_config_dword);

  hose->region_count = 2;

  pci_register_hose(hose);

  hose->last_busno = pci_hose_scan(hose);
}