sys/arm/lpc/lpc_machdep.c

   1 /*-
   2  * Copyright (c) 1994-1998 Mark Brinicombe.
   3  * Copyright (c) 1994 Brini.
   4  * All rights reserved.
   5  *
   6  * This code is derived from software written for Brini by Mark Brinicombe
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Brini.
  19  * 4. The name of the company nor the name of the author may be used to
  20  *    endorse or promote products derived from this software without specific
  21  *    prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
  24  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  27  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  28  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  29  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
  36  */
  37
  38 #include "opt_ddb.h"
  39 #include "opt_platform.h"
  40
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD$");
  43
  44 #define _ARM32_BUS_DMA_PRIVATE
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/bus.h>
  48 #include <sys/devmap.h>
  49
  50 #include <vm/vm.h>
  51 #include <vm/pmap.h>
  52
  53 #include <machine/bus.h>
  54 #include <machine/fdt.h>
  55 #include <machine/machdep.h>
  56 #include <machine/platform.h>
  57
  58 #include <arm/lpc/lpcreg.h>
  59 #include <arm/lpc/lpcvar.h>
  60
  61 #include <dev/fdt/fdt_common.h>
  62
  63 vm_offset_t
  64 platform_lastaddr(void)
  65 {
  66
  67         return (devmap_lastaddr());
  68 }
  69
  70 void
  71 platform_probe_and_attach(void)
  72 {
  73 }
  74
  75 void
  76 platform_gpio_init(void)
  77 {
  78
  79         /*
  80          * Set initial values of GPIO output ports
  81          */
  82         lpc_gpio_init();
  83 }
  84
  85 void
  86 platform_late_init(void)
  87 {
  88 }
  89
  90 /*
  91  * Add a single static device mapping.
  92  * The values used were taken from the ranges property of the SoC node in the
  93  * dts file when this code was converted to devmap_add_entry().
  94  */
  95 int
  96 platform_devmap_init(void)
  97 {
  98
  99         devmap_add_entry(LPC_DEV_PHYS_BASE, LPC_DEV_SIZE);
 100         return (0);
 101 }
 102
 103 struct arm32_dma_range *
 104 bus_dma_get_range(void)
 105 {
 106
 107         return (NULL);
 108 }
 109
 110 int
 111 bus_dma_get_range_nb(void)
 112 {
 113
 114         return (0);
 115 }
 116
 117 void
 118 cpu_reset(void)
 119 {
 120         bus_space_tag_t bst;
 121         bus_space_handle_t bsh;
 122
 123         bst = fdtbus_bs_tag;
 124
 125         /* Enable WDT */
 126         bus_space_map(bst, LPC_CLKPWR_PHYS_BASE, LPC_CLKPWR_SIZE, 0, &bsh);
 127         bus_space_write_4(bst, bsh, LPC_CLKPWR_TIMCLK_CTRL,
 128             LPC_CLKPWR_TIMCLK_CTRL_WATCHDOG);
 129         bus_space_unmap(bst, bsh, LPC_CLKPWR_SIZE);
 130
 131         /* Instant assert of RESETOUT_N with pulse length 1ms */
 132         bus_space_map(bst, LPC_WDTIM_PHYS_BASE, LPC_WDTIM_SIZE, 0, &bsh);
 133         bus_space_write_4(bst, bsh, LPC_WDTIM_PULSE, 13000);
 134         bus_space_write_4(bst, bsh, LPC_WDTIM_MCTRL, 0x70);
 135         bus_space_unmap(bst, bsh, LPC_WDTIM_SIZE);
 136
 137         for (;;)
 138                 continue;
 139 }
 140