tegra2_machdep.c

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    1 /*-
    2  * Copyright (c) 2011 Damjan Marion.
    3  * Copyright (c) 1994-1998 Mark Brinicombe.
    4  * Copyright (c) 1994 Brini.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software written for Brini by Mark Brinicombe
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * from: FreeBSD: //depot/projects/arm/src/sys/arm/mv/mv_machdep.c
   31  */
   32 
   33 #include "opt_ddb.h"
   34 #include "opt_platform.h"
   35 
   36 #include <sys/cdefs.h>
   37 __FBSDID("$FreeBSD: releng/10.1/sys/arm/tegra/tegra2_machdep.c 266084 2014-05-14 19:18:58Z ian $");
   38 
   39 #define _ARM32_BUS_DMA_PRIVATE
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/bus.h>
   43 
   44 #include <vm/vm.h>
   45 #include <vm/pmap.h>
   46 
   47 #include <machine/bus.h>
   48 #include <machine/devmap.h>
   49 #include <machine/machdep.h>
   50 
   51 #include <dev/fdt/fdt_common.h>
   52 
   53 #define TEGRA2_CLK_RST_PA_BASE          0x60006000
   54 
   55 #define TEGRA2_CLK_RST_OSC_FREQ_DET_REG         0x58
   56 #define TEGRA2_CLK_RST_OSC_FREQ_DET_STAT_REG    0x5C
   57 #define OSC_FREQ_DET_TRIG                       (1U<<31)
   58 #define OSC_FREQ_DET_BUSY                       (1U<<31)
   59 
   60 #if 0
   61 static int
   62 tegra2_osc_freq_detect(void)
   63 {
   64         bus_space_handle_t      bsh;
   65         uint32_t                c;
   66         uint32_t                r=0;
   67         int                     i=0;
   68 
   69         struct {
   70                 uint32_t val;
   71                 uint32_t freq;
   72         } freq_det_cnts[] = {
   73                 { 732,  12000000 },
   74                 { 794,  13000000 },
   75                 {1172,  19200000 },
   76                 {1587,  26000000 },
   77                 {  -1,         0 },
   78         };
   79 
   80         printf("Measuring...\n");
   81         bus_space_map(fdtbus_bs_tag,TEGRA2_CLK_RST_PA_BASE, 0x1000, 0, &bsh);
   82 
   83         bus_space_write_4(fdtbus_bs_tag, bsh, TEGRA2_CLK_RST_OSC_FREQ_DET_REG,
   84                         OSC_FREQ_DET_TRIG | 1 );
   85         do {} while (bus_space_read_4(fdtbus_bs_tag, bsh,
   86                         TEGRA2_CLK_RST_OSC_FREQ_DET_STAT_REG) & OSC_FREQ_DET_BUSY);
   87 
   88         c = bus_space_read_4(fdtbus_bs_tag, bsh, TEGRA2_CLK_RST_OSC_FREQ_DET_STAT_REG);
   89 
   90         while (freq_det_cnts[i].val > 0) {
   91                 if (((freq_det_cnts[i].val - 3) < c) && (c < (freq_det_cnts[i].val + 3)))
   92                         r = freq_det_cnts[i].freq;
   93                 i++;
   94         }
   95         printf("c=%u r=%u\n",c,r );
   96         bus_space_free(fdtbus_bs_tag, bsh, 0x1000);
   97         return r;
   98 }
   99 #endif
  100 
  101 vm_offset_t
  102 initarm_lastaddr(void)
  103 {
  104 
  105         return (arm_devmap_lastaddr());
  106 }
  107 
  108 void
  109 initarm_early_init(void)
  110 {
  111 }
  112 
  113 void
  114 initarm_gpio_init(void)
  115 {
  116 }
  117 
  118 void
  119 initarm_late_init(void)
  120 {
  121 }
  122 
  123 /*
  124  * Add a static mapping for the register range that includes the debug uart.
  125  * It's not clear this is needed, but the original code established this mapping
  126  * before conversion to the newer arm_devmap_add_entry() routine.
  127  */
  128 int
  129 initarm_devmap_init(void)
  130 {
  131 
  132         arm_devmap_add_entry(0x70000000, 0x00100000);
  133         return (0);
  134 }
  135 
  136 struct arm32_dma_range *
  137 bus_dma_get_range(void)
  138 {
  139 
  140         return (NULL);
  141 }
  142 
  143 int
  144 bus_dma_get_range_nb(void)
  145 {
  146 
  147         return (0);
  148 }
  149

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

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sys/arm/tegra/tegra2_machdep.c