BCM6348 GPIO pinmux

Memory address: 0xfffe0418
Size: 4 bytes

Note: the EXT IRQs are shared with the GPIO function, they don't need to be enabled by any gpio mode group.

Code from Broadcom GPL (6348_map_part.h file):

  uint32        GPIOMode;  //0xfffe0400 + 0x18
#define         GROUP4_DIAG             0x00090000
#define         GROUP4_UTOPIA           0x00080000
#define         GROUP4_LEGACY_LED       0x00030000
#define         GROUP4_MII_SNOOP        0x00020000
#define         GROUP4_EXT_EPHY         0x00010000
#define         GROUP3_DIAG             0x00009000
#define         GROUP3_UTOPIA           0x00008000
#define         GROUP3_EXT_MII          0x00007000 // presumable use
#define         GROUP2_DIAG             0x00000900
#define         GROUP2_PCI              0x00000500 // presumable use
#define         GROUP1_DIAG             0x00000090
#define         GROUP1_UTOPIA           0x00000080
#define         GROUP1_SPI_UART         0x00000060
#define         GROUP1_SPI_MASTER       0x00000060 // presumable use
#define         GROUP1_MII_PCCARD       0x00000040 // presumable use
#define         GROUP1_MII_SNOOP        0x00000020
#define         GROUP1_EXT_EPHY         0x00000010
#define         GROUP0_DIAG             0x00000009
#define         GROUP0_EXT_MII          0x00000007 // presumable use

Code from Broadcom GPL, enabling some GPIO modes. (File linux/arch/mips/brcm-boards/bcm963xx/setup.c)

static int __init bcm6348_hw_init(void)
{
    unsigned long data;
    unsigned short GPIOOverlays;
 
    /* Set MPI clock to 33MHz and Utopia clock to 25MHz */
    data = PERF->pll_control;
    data &= ~MPI_CLK_MASK;
    data |= MPI_CLK_33MHZ;
    data &= ~MPI_UTOPIA_MASK;
    data |= MPI_UTOPIA_25MHZ; /* 6348 utopia frequency has to be 25MHZ */
    PERF->pll_control = data;
 
    /* Enable SPI interface */
    PERF->blkEnables |= SPI_CLK_EN;
 
    GPIO->GPIOMode = 0;
 
    if( BpGetGPIOverlays(&GPIOOverlays) == BP_SUCCESS ) {
 
        if (GPIOOverlays & BP_UTOPIA) {
            /* Enable UTOPIA interface */
            GPIO->GPIOMode |= GROUP4_UTOPIA | GROUP3_UTOPIA | GROUP1_UTOPIA;
            PERF->blkEnables |= SAR_CLK_EN;
        }
 
        if (GPIOOverlays & BP_MII2) {
            if (GPIOOverlays & BP_UTOPIA) {
                printk ("*************** ERROR ***************\n");
                printk ("Invalid GPIO configuration. External MII cannot be enabled with UTOPIA\n");
            }
            /* Enable external MII interface */
            GPIO->GPIOMode |= (GROUP3_EXT_MII|GROUP0_EXT_MII); /*  */
        }
 
        if (GPIOOverlays & BP_SPI_EXT_CS) {
            if (GPIOOverlays & BP_UTOPIA) {
                printk ("*************** ERROR ***************\n");
                printk ("Invalid GPIO configuration. SPI Extra CS cannot be enabled with UTOPIA\n");
            }
            /* Enable Extra SPI CS */
            GPIO->GPIOMode |= GROUP1_SPI_MASTER;
        }
 
#if defined(CONFIG_PCI)
        if (GPIOOverlays & BP_PCI) {
            /* Enable PCI interface */
            GPIO->GPIOMode |= GROUP2_PCI | GROUP1_MII_PCCARD;
 
            mpi_init();
            if (GPIOOverlays & BP_CB) {
                mpi_DetectPcCard();
            }
            else {
                /*
                 * CardBus support is defaulted to Slot 0 because there is no external
                 * IDSEL for CardBus.  To disable the CardBus and allow a standard PCI
                 * card in Slot 0 set the cbus_idsel field to 0x1f.
                */
                data = MPI->pcmcia_cntl1;
                data |= CARDBUS_IDSEL;
                MPI->pcmcia_cntl1 = data;
            }
        }
#endif
    }

The list of related devices: bcm6348, bcm63xx, gpio