FreeBSD/Linux Kernel Cross Reference
sys/arm/lpc/lpc_machdep.c

     /*-
      * Copyright (c) 1994-1998 Mark Brinicombe.
      * Copyright (c) 1994 Brini.
      * All rights reserved.
      *
      * This code is derived from software written for Brini by Mark Brinicombe
      *
      * 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 Brini.
     * 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 BRINI ``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 BRINI OR CONTRIBUTORS 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.
     *
     * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
     */
    
    #include "opt_ddb.h"
    #include "opt_platform.h"
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/10.2/sys/arm/lpc/lpc_machdep.c 266084 2014-05-14 19:18:58Z ian $");
    
    #define _ARM32_BUS_DMA_PRIVATE
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #include <machine/bus.h>
    #include <machine/fdt.h>
    #include <machine/devmap.h>
    #include <machine/machdep.h>
    
    #include <arm/lpc/lpcreg.h>
    #include <arm/lpc/lpcvar.h>
    
    #include <dev/fdt/fdt_common.h>
    
    vm_offset_t
    initarm_lastaddr(void)
    {
    
            return (arm_devmap_lastaddr());
    }
    
    void
    initarm_early_init(void)
    {
    }
    
    void
    initarm_gpio_init(void)
    {
    
            /*
             * Set initial values of GPIO output ports
             */
            platform_gpio_init();
    }
    
    void
    initarm_late_init(void)
    {
    }
    
    /*
     * Add a single static device mapping.
     * The values used were taken from the ranges property of the SoC node in the
     * dts file when this code was converted to arm_devmap_add_entry().
     */
    int
    initarm_devmap_init(void)
    {
    
            arm_devmap_add_entry(LPC_DEV_PHYS_BASE, LPC_DEV_SIZE);
            return (0);
   }
   
   struct arm32_dma_range *
   bus_dma_get_range(void)
   {
   
           return (NULL);
   }
   
   int
   bus_dma_get_range_nb(void)
   {
   
           return (0);
   }
   
   void
   cpu_reset(void)
   {
           bus_space_tag_t bst;
           bus_space_handle_t bsh;
   
           bst = fdtbus_bs_tag;
   
           /* Enable WDT */
           bus_space_map(bst, LPC_CLKPWR_PHYS_BASE, LPC_CLKPWR_SIZE, 0, &bsh);
           bus_space_write_4(bst, bsh, LPC_CLKPWR_TIMCLK_CTRL,
               LPC_CLKPWR_TIMCLK_CTRL_WATCHDOG);
           bus_space_unmap(bst, bsh, LPC_CLKPWR_SIZE);
   
           /* Instant assert of RESETOUT_N with pulse length 1ms */
           bus_space_map(bst, LPC_WDTIM_PHYS_BASE, LPC_WDTIM_SIZE, 0, &bsh);
           bus_space_write_4(bst, bsh, LPC_WDTIM_PULSE, 13000);
           bus_space_write_4(bst, bsh, LPC_WDTIM_MCTRL, 0x70);
           bus_space_unmap(bst, bsh, LPC_WDTIM_SIZE);
   
           for (;;)
                   continue;
   }
   

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