arch/m68k/platform/coldfire/m5272.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/5272/config.c
   5  *
   6  *      Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
   7  *      Copyright (C) 2001-2002, SnapGear Inc. (www.snapgear.com)
   8  */
   9
  10 /***************************************************************************/
  11
  12 #include <linux/kernel.h>
  13 #include <linux/param.h>
  14 #include <linux/init.h>
  15 #include <linux/io.h>
  16 #include <linux/phy.h>
  17 #include <linux/phy_fixed.h>
  18 #include <asm/machdep.h>
  19 #include <asm/coldfire.h>
  20 #include <asm/mcfsim.h>
  21 #include <asm/mcfuart.h>
  22 #include <asm/mcfclk.h>
  23
  24 /***************************************************************************/
  25
  26 /*
  27  *      Some platforms need software versions of the GPIO data registers.
  28  */
  29 unsigned short ppdata;
  30 unsigned char ledbank = 0xff;
  31
  32 /***************************************************************************/
  33
  34 DEFINE_CLK(pll, "pll.0", MCF_CLK);
  35 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
  36 DEFINE_CLK(mcftmr0, "mcftmr.0", MCF_BUSCLK);
  37 DEFINE_CLK(mcftmr1, "mcftmr.1", MCF_BUSCLK);
  38 DEFINE_CLK(mcftmr2, "mcftmr.2", MCF_BUSCLK);
  39 DEFINE_CLK(mcftmr3, "mcftmr.3", MCF_BUSCLK);
  40 DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
  41 DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
  42 DEFINE_CLK(fec0, "fec.0", MCF_BUSCLK);
  43
  44 struct clk *mcf_clks[] = {
  45         &clk_pll,
  46         &clk_sys,
  47         &clk_mcftmr0,
  48         &clk_mcftmr1,
  49         &clk_mcftmr2,
  50         &clk_mcftmr3,
  51         &clk_mcfuart0,
  52         &clk_mcfuart1,
  53         &clk_fec0,
  54         NULL
  55 };
  56
  57 /***************************************************************************/
  58
  59 static void __init m5272_uarts_init(void)
  60 {
  61         u32 v;
  62
  63         /* Enable the output lines for the serial ports */
  64         v = readl(MCFSIM_PBCNT);
  65         v = (v & ~0x000000ff) | 0x00000055;
  66         writel(v, MCFSIM_PBCNT);
  67
  68         v = readl(MCFSIM_PDCNT);
  69         v = (v & ~0x000003fc) | 0x000002a8;
  70         writel(v, MCFSIM_PDCNT);
  71 }
  72
  73 /***************************************************************************/
  74
  75 static void m5272_cpu_reset(void)
  76 {
  77         local_irq_disable();
  78         /* Set watchdog to reset, and enabled */
  79         __raw_writew(0, MCFSIM_WIRR);
  80         __raw_writew(1, MCFSIM_WRRR);
  81         __raw_writew(0, MCFSIM_WCR);
  82         for (;;)
  83                 /* wait for watchdog to timeout */;
  84 }
  85
  86 /***************************************************************************/
  87
  88 void __init config_BSP(char *commandp, int size)
  89 {
  90 #if defined (CONFIG_MOD5272)
  91         /* Set base of device vectors to be 64 */
  92         writeb(0x40, MCFSIM_PIVR);
  93 #endif
  94
  95 #if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
  96         /* Copy command line from FLASH to local buffer... */
  97         memcpy(commandp, (char *) 0xf0004000, size);
  98         commandp[size-1] = 0;
  99 #elif defined(CONFIG_CANCam)
 100         /* Copy command line from FLASH to local buffer... */
 101         memcpy(commandp, (char *) 0xf0010000, size);
 102         commandp[size-1] = 0;
 103 #endif
 104
 105         mach_reset = m5272_cpu_reset;
 106         mach_sched_init = hw_timer_init;
 107 }
 108
 109 /***************************************************************************/
 110
 111 /*
 112  * Some 5272 based boards have the FEC ethernet diectly connected to
 113  * an ethernet switch. In this case we need to use the fixed phy type,
 114  * and we need to declare it early in boot.
 115  */
 116 static struct fixed_phy_status nettel_fixed_phy_status __initdata = {
 117         .link   = 1,
 118         .speed  = 100,
 119         .duplex = 0,
 120 };
 121
 122 /***************************************************************************/
 123
 124 static int __init init_BSP(void)
 125 {
 126         m5272_uarts_init();
 127         fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status);
 128         return 0;
 129 }
 130
 131 arch_initcall(init_BSP);
 132
 133 /***************************************************************************/