arch/m68k/coldfire/m5272.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      m5272.c  -- platform support for ColdFire 5272 based boards
   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(mcfqspi0, "mcfqspi.0", MCF_BUSCLK);
  43 DEFINE_CLK(fec0, "fec.0", MCF_BUSCLK);
  44
  45 struct clk *mcf_clks[] = {
  46         &clk_pll,
  47         &clk_sys,
  48         &clk_mcftmr0,
  49         &clk_mcftmr1,
  50         &clk_mcftmr2,
  51         &clk_mcftmr3,
  52         &clk_mcfuart0,
  53         &clk_mcfuart1,
  54         &clk_mcfqspi0,
  55         &clk_fec0,
  56         NULL
  57 };
  58
  59 /***************************************************************************/
  60
  61 static void __init m5272_uarts_init(void)
  62 {
  63         u32 v;
  64
  65         /* Enable the output lines for the serial ports */
  66         v = readl(MCFSIM_PBCNT);
  67         v = (v & ~0x000000ff) | 0x00000055;
  68         writel(v, MCFSIM_PBCNT);
  69
  70         v = readl(MCFSIM_PDCNT);
  71         v = (v & ~0x000003fc) | 0x000002a8;
  72         writel(v, MCFSIM_PDCNT);
  73 }
  74
  75 /***************************************************************************/
  76
  77 static void m5272_cpu_reset(void)
  78 {
  79         local_irq_disable();
  80         /* Set watchdog to reset, and enabled */
  81         __raw_writew(0, MCFSIM_WIRR);
  82         __raw_writew(1, MCFSIM_WRRR);
  83         __raw_writew(0, MCFSIM_WCR);
  84         for (;;)
  85                 /* wait for watchdog to timeout */;
  86 }
  87
  88 /***************************************************************************/
  89
  90 void __init config_BSP(char *commandp, int size)
  91 {
  92 #if defined (CONFIG_MOD5272)
  93         /* Set base of device vectors to be 64 */
  94         writeb(0x40, MCFSIM_PIVR);
  95 #endif
  96
  97 #if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
  98         /* Copy command line from FLASH to local buffer... */
  99         memcpy(commandp, (char *) 0xf0004000, size);
 100         commandp[size-1] = 0;
 101 #elif defined(CONFIG_CANCam)
 102         /* Copy command line from FLASH to local buffer... */
 103         memcpy(commandp, (char *) 0xf0010000, size);
 104         commandp[size-1] = 0;
 105 #endif
 106
 107         mach_reset = m5272_cpu_reset;
 108         mach_sched_init = hw_timer_init;
 109 }
 110
 111 /***************************************************************************/
 112
 113 /*
 114  * Some 5272 based boards have the FEC ethernet directly connected to
 115  * an ethernet switch. In this case we need to use the fixed phy type,
 116  * and we need to declare it early in boot.
 117  */
 118 static struct fixed_phy_status nettel_fixed_phy_status __initdata = {
 119         .link   = 1,
 120         .speed  = 100,
 121         .duplex = 0,
 122 };
 123
 124 /***************************************************************************/
 125
 126 static int __init init_BSP(void)
 127 {
 128         m5272_uarts_init();
 129         fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status, -1);
 130         return 0;
 131 }
 132
 133 arch_initcall(init_BSP);
 134
 135 /***************************************************************************/