FreeBSD/Linux Kernel Cross Reference
sys/arm/tegra/tegra2_machdep.c

     /*-
      * Copyright (c) 2011 Damjan Marion.
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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/mv/mv_machdep.c
     */
    
    #include "opt_ddb.h"
    #include "opt_platform.h"
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/10.0/sys/arm/tegra/tegra2_machdep.c 242531 2012-11-03 22:39:07Z andrew $");
    
    #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/frame.h> /* For trapframe_t, used in <machine/machdep.h> */
    #include <machine/machdep.h>
    #include <machine/pmap.h>
    
    #include <dev/fdt/fdt_common.h>
    
    /* FIXME move to tegrareg.h */
    #define TEGRA2_BASE                     0xE0000000      /* KVM base for peripherials */
    #define TEGRA2_UARTA_VA_BASE            0xE0006000
    #define TEGRA2_UARTA_PA_BASE            0x70006000
    
    #define TEGRA2_CLK_RST_PA_BASE          0x60006000
    
    #define TEGRA2_CLK_RST_OSC_FREQ_DET_REG         0x58
    #define TEGRA2_CLK_RST_OSC_FREQ_DET_STAT_REG    0x5C
    #define OSC_FREQ_DET_TRIG                       (1<<31)
    #define OSC_FREQ_DET_BUSY                       (1<<31)
    
    #if 0
    static int
    tegra2_osc_freq_detect(void)
    {
            bus_space_handle_t      bsh;
            uint32_t                c;
            uint32_t                r=0;
            int                     i=0;
    
            struct {
                    uint32_t val;
                    uint32_t freq;
            } freq_det_cnts[] = {
                    { 732,  12000000 },
                    { 794,  13000000 },
                    {1172,  19200000 },
                    {1587,  26000000 },
                    {  -1,         0 },
            };
    
            printf("Measuring...\n");
            bus_space_map(fdtbus_bs_tag,TEGRA2_CLK_RST_PA_BASE, 0x1000, 0, &bsh);
    
            bus_space_write_4(fdtbus_bs_tag, bsh, TEGRA2_CLK_RST_OSC_FREQ_DET_REG,
                            OSC_FREQ_DET_TRIG | 1 );
            do {} while (bus_space_read_4(fdtbus_bs_tag, bsh,
                            TEGRA2_CLK_RST_OSC_FREQ_DET_STAT_REG) & OSC_FREQ_DET_BUSY);
    
            c = bus_space_read_4(fdtbus_bs_tag, bsh, TEGRA2_CLK_RST_OSC_FREQ_DET_STAT_REG);
    
            while (freq_det_cnts[i].val > 0) {
                    if (((freq_det_cnts[i].val - 3) < c) && (c < (freq_det_cnts[i].val + 3)))
                            r = freq_det_cnts[i].freq;
                    i++;
           }
           printf("c=%u r=%u\n",c,r );
           bus_space_free(fdtbus_bs_tag, bsh, 0x1000);
           return r;
   }
   #endif
   
   vm_offset_t
   initarm_lastaddr(void)
   {
   
           if (fdt_immr_addr(TEGRA2_BASE) != 0)                            /* FIXME ???? */
                   while (1);
   
           return (fdt_immr_va - ARM_NOCACHE_KVA_SIZE);
   }
   
   void
   initarm_gpio_init(void)
   {
   }
   
   void
   initarm_late_init(void)
   {
   }
   
   #define FDT_DEVMAP_MAX  (1 + 2 + 1 + 1) /* FIXME */
   static struct pmap_devmap fdt_devmap[FDT_DEVMAP_MAX] = {
           { 0, 0, 0, 0, 0, }
   };
   
   /*
    * Construct pmap_devmap[] with DT-derived config data.
    */
   int
   platform_devmap_init(void)
   {
           int i = 0;
           fdt_devmap[i].pd_va = 0xe0000000;
           fdt_devmap[i].pd_pa = 0x70000000;
           fdt_devmap[i].pd_size = 0x100000;
           fdt_devmap[i].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
           fdt_devmap[i].pd_cache = PTE_NOCACHE;
           i++;
   
           pmap_devmap_bootstrap_table = &fdt_devmap[0];
           return (0);
   }
   
   struct arm32_dma_range *
   bus_dma_get_range(void)
   {
   
           return (NULL);
   }
   
   int
   bus_dma_get_range_nb(void)
   {
   
           return (0);
   }
   

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