LXR linux/arch/m68k/coldfire/m5272.c

   1// SPDX-License-Identifier: GPL-2.0
   2/***************************************************************************/
   3
   4/*
   5 *      m5272.c  -- platform support for ColdFire 5272 based boards
   6 *
   7 *      Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
   8 *      Copyright (C) 2001-2002, SnapGear Inc. (www.snapgear.com)
   9 */
  10
  11/***************************************************************************/
  12
  13#include <linux/clkdev.h>
  14#include <linux/kernel.h>
  15#include <linux/param.h>
  16#include <linux/init.h>
  17#include <linux/io.h>
  18#include <linux/phy.h>
  19#include <linux/phy_fixed.h>
  20#include <asm/machdep.h>
  21#include <asm/coldfire.h>
  22#include <asm/mcfsim.h>
  23#include <asm/mcfuart.h>
  24#include <asm/mcfclk.h>
  25
  26/***************************************************************************/
  27
  28/*
  29 *      Some platforms need software versions of the GPIO data registers.
  30 */
  31unsigned short ppdata;
  32unsigned char ledbank = 0xff;
  33
  34/***************************************************************************/
  35
  36DEFINE_CLK(pll, "pll.0", MCF_CLK);
  37DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
  38
  39static struct clk_lookup m5272_clk_lookup[] = {
  40        CLKDEV_INIT(NULL, "pll.0", &clk_pll),
  41        CLKDEV_INIT(NULL, "sys.0", &clk_sys),
  42        CLKDEV_INIT("mcftmr.0", NULL, &clk_sys),
  43        CLKDEV_INIT("mcftmr.1", NULL, &clk_sys),
  44        CLKDEV_INIT("mcftmr.2", NULL, &clk_sys),
  45        CLKDEV_INIT("mcftmr.3", NULL, &clk_sys),
  46        CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),
  47        CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),
  48        CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),
  49        CLKDEV_INIT("fec.0", NULL, &clk_sys),
  50};
  51
  52/***************************************************************************/
  53
  54static void __init m5272_uarts_init(void)
  55{
  56        u32 v;
  57
  58        /* Enable the output lines for the serial ports */
  59        v = readl(MCFSIM_PBCNT);
  60        v = (v & ~0x000000ff) | 0x00000055;
  61        writel(v, MCFSIM_PBCNT);
  62
  63        v = readl(MCFSIM_PDCNT);
  64        v = (v & ~0x000003fc) | 0x000002a8;
  65        writel(v, MCFSIM_PDCNT);
  66}
  67
  68/***************************************************************************/
  69
  70static void m5272_cpu_reset(void)
  71{
  72        local_irq_disable();
  73        /* Set watchdog to reset, and enabled */
  74        __raw_writew(0, MCFSIM_WIRR);
  75        __raw_writew(1, MCFSIM_WRRR);
  76        __raw_writew(0, MCFSIM_WCR);
  77        for (;;)
  78                /* wait for watchdog to timeout */;
  79}
  80
  81/***************************************************************************/
  82
  83void __init config_BSP(char *commandp, int size)
  84{
  85#if defined (CONFIG_MOD5272)
  86        /* Set base of device vectors to be 64 */
  87        writeb(0x40, MCFSIM_PIVR);
  88#endif
  89
  90#if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
  91        /* Copy command line from FLASH to local buffer... */
  92        memcpy(commandp, (char *) 0xf0004000, size);
  93        commandp[size-1] = 0;
  94#elif defined(CONFIG_CANCam)
  95        /* Copy command line from FLASH to local buffer... */
  96        memcpy(commandp, (char *) 0xf0010000, size);
  97        commandp[size-1] = 0;
  98#endif
  99
 100        mach_reset = m5272_cpu_reset;
 101        mach_sched_init = hw_timer_init;
 102}
 103
 104/***************************************************************************/
 105
 106/*
 107 * Some 5272 based boards have the FEC ethernet directly connected to
 108 * an ethernet switch. In this case we need to use the fixed phy type,
 109 * and we need to declare it early in boot.
 110 */
 111static struct fixed_phy_status nettel_fixed_phy_status __initdata = {
 112        .link   = 1,
 113        .speed  = 100,
 114        .duplex = 0,
 115};
 116
 117/***************************************************************************/
 118
 119static int __init init_BSP(void)
 120{
 121        m5272_uarts_init();
 122        fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status);
 123        clkdev_add_table(m5272_clk_lookup, ARRAY_SIZE(m5272_clk_lookup));
 124        return 0;
 125}
 126
 127arch_initcall(init_BSP);
 128
 129/***************************************************************************/
 130