FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/ixp425/ixdp425_pci.c

     /*      $NetBSD: ixdp425_pci.c,v 1.5 2005/12/11 12:17:09 christos Exp $ */
     /*
      * Copyright (c) 2003
      *      Ichiro FUKUHARA <ichiro@ichiro.org>.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Ichiro FUKUHARA.
     * 4. The name of the company nor the name of the author may be used to
     *    endorse or promote products derived from this software without specific
     *    prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
     * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/10.2/sys/arm/xscale/ixp425/ixdp425_pci.c 229125 2011-12-31 15:53:34Z marius $");
    
    #define _ARM32_BUS_DMA_PRIVATE
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/malloc.h>
    #include <sys/rman.h>
    
    #include <dev/pci/pcivar.h>
    
    #include <machine/bus.h>
    #include <machine/intr.h>
    
    #include <arm/xscale/ixp425/ixp425reg.h>
    #include <arm/xscale/ixp425/ixp425var.h>
    #include <arm/xscale/ixp425/ixp425_intr.h>
    #include <arm/xscale/ixp425/ixdp425reg.h>
    
    void
    ixp425_md_attach(device_t dev)
    {
            struct ixp425_softc *sc = device_get_softc(device_get_parent(dev));
            struct ixppcib_softc *pci_sc = device_get_softc(dev);
            uint32_t reg;
    
            
            /* PCI Reset Assert */
            reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR);
            reg &= ~(1U << GPIO_PCI_RESET);
            GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg);
    
            /* PCI Clock Disable */
            reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPCLKR);
            reg &= ~GPCLKR_MUX14;
            GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPCLKR, reg);
    
            /*
             * set GPIO Direction
             *      Output: PCI_CLK, PCI_RESET
             *      Input:  PCI_INTA, PCI_INTB, PCI_INTC, PCI_INTD
             */
            reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER);
            reg &= ~(1U << GPIO_PCI_CLK);
            reg &= ~(1U << GPIO_PCI_RESET);
            reg |= ((1U << GPIO_PCI_INTA) | (1U << GPIO_PCI_INTB) |
                    (1U << GPIO_PCI_INTC) | (1U << GPIO_PCI_INTD));
            GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER, reg);
    
            /*
             * Set GPIO interrupt type
             *      PCI_INT_A, PCI_INTB, PCI_INT_C, PCI_INT_D: Active Low
             */
            reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTA));
            reg &= ~GPIO_TYPE(GPIO_PCI_INTA, GPIO_TYPE_MASK);
            reg |= GPIO_TYPE(GPIO_PCI_INTA, GPIO_TYPE_ACT_LOW);
            GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTA), reg);
    
            reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTB));
            reg &= ~GPIO_TYPE(GPIO_PCI_INTB, GPIO_TYPE_MASK);
            reg |= GPIO_TYPE(GPIO_PCI_INTB, GPIO_TYPE_ACT_LOW);
            GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTB), reg);
   
           reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTC));
           reg &= ~GPIO_TYPE(GPIO_PCI_INTC, GPIO_TYPE_MASK);
           reg |= GPIO_TYPE(GPIO_PCI_INTC, GPIO_TYPE_ACT_LOW);
           GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTC), reg);
   
           reg = GPIO_CONF_READ_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTD));
           reg &= ~GPIO_TYPE(GPIO_PCI_INTD, GPIO_TYPE_MASK);
           reg |= GPIO_TYPE(GPIO_PCI_INTD, GPIO_TYPE_ACT_LOW);
           GPIO_CONF_WRITE_4(sc, GPIO_TYPE_REG(GPIO_PCI_INTD), reg);
   
           /* clear ISR */
           GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPISR,
                             (1U << GPIO_PCI_INTA) | (1U << GPIO_PCI_INTB) |
                             (1U << GPIO_PCI_INTC) | (1U << GPIO_PCI_INTD));
   
           /* wait 1ms to satisfy "minimum reset assertion time" of the PCI spec */
           DELAY(1000);
           reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPCLKR);
           GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPCLKR, reg |
                   (0xf << GPCLKR_CLK0DC_SHIFT) | (0xf << GPCLKR_CLK0TC_SHIFT));
   
           /* PCI Clock Enable */
           reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPCLKR);
           reg |= GPCLKR_MUX14;
           GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPCLKR, reg | GPCLKR_MUX14);
   
           /*
            * wait 100us to satisfy "minimum reset assertion time from clock stable
            * requirement of the PCI spec
            */
           DELAY(100);
           /* PCI Reset deassert */
           reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR);
           reg |= 1U << GPIO_PCI_RESET;
           GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg | (1U << GPIO_PCI_RESET));
           pci_sc->sc_irq_rman.rm_type = RMAN_ARRAY;
           pci_sc->sc_irq_rman.rm_descr = "IXP425 PCI IRQs";
           CTASSERT(PCI_INT_D < PCI_INT_A);
           /* XXX this overlaps the irq's setup in ixp425_attach */
           if (rman_init(&pci_sc->sc_irq_rman) != 0 ||
               rman_manage_region(&pci_sc->sc_irq_rman, PCI_INT_D, PCI_INT_A) != 0)
                   panic("ixp425_md_attach: failed to set up IRQ rman");
   }
   
   #define IXP425_MAX_DEV  5
   #define IXP425_MAX_LINE 4
   
   int
   ixp425_md_route_interrupt(device_t bridge, device_t device, int pin)
   {
           static int ixp425_pci_table[IXP425_MAX_DEV][IXP425_MAX_LINE] = {
                   {PCI_INT_A, PCI_INT_B, PCI_INT_C, PCI_INT_D},
                   {PCI_INT_B, PCI_INT_C, PCI_INT_D, PCI_INT_A},
                   {PCI_INT_C, PCI_INT_D, PCI_INT_A, PCI_INT_B},
                   {PCI_INT_D, PCI_INT_A, PCI_INT_B, PCI_INT_C},
                   /* NB: for optional USB controller on Gateworks Avila */
                   {PCI_INT_A, PCI_INT_B, PCI_INT_C, PCI_INT_D},
           };
           int dev;
           
           dev = pci_get_slot(device);
           if (bootverbose)
                   device_printf(bridge, "routing pin %d for %s\n", pin,
                       device_get_nameunit(device));
           if (pin >= 1 && pin <= IXP425_MAX_LINE &&
               dev >= 1 && dev <= IXP425_MAX_DEV) {
                   return (ixp425_pci_table[dev - 1][pin - 1]);
           } else
                   printf("ixppcib: no mapping for %d/%d/%d\n",
                           pci_get_bus(device), dev, pci_get_function(device));
   
           return (-1);
   }

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