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/kernel.h>
  14 #include <linux/param.h>
  15 #include <linux/init.h>
  16 #include <linux/io.h>
  17 #include <linux/phy.h>
  18 #include <linux/phy_fixed.h>
  19 #include <asm/machdep.h>
  20 #include <asm/coldfire.h>
  21 #include <asm/mcfsim.h>
  22 #include <asm/mcfuart.h>
  23 #include <asm/mcfclk.h>
  24
  25 /***************************************************************************/
  26
  27 /*
  28  *      Some platforms need software versions of the GPIO data registers.
  29  */
  30 unsigned short ppdata;
  31 unsigned char ledbank = 0xff;
  32
  33 /***************************************************************************/
  34
  35 DEFINE_CLK(pll, "pll.0", MCF_CLK);
  36 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
  37 DEFINE_CLK(mcftmr0, "mcftmr.0", MCF_BUSCLK);
  38 DEFINE_CLK(mcftmr1, "mcftmr.1", MCF_BUSCLK);
  39 DEFINE_CLK(mcftmr2, "mcftmr.2", MCF_BUSCLK);
  40 DEFINE_CLK(mcftmr3, "mcftmr.3", MCF_BUSCLK);
  41 DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
  42 DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
  43 DEFINE_CLK(mcfqspi0, "mcfqspi.0", MCF_BUSCLK);
  44 DEFINE_CLK(fec0, "fec.0", MCF_BUSCLK);
  45
  46 struct clk *mcf_clks[] = {
  47         &clk_pll,
  48         &clk_sys,
  49         &clk_mcftmr0,
  50         &clk_mcftmr1,
  51         &clk_mcftmr2,
  52         &clk_mcftmr3,
  53         &clk_mcfuart0,
  54         &clk_mcfuart1,
  55         &clk_mcfqspi0,
  56         &clk_fec0,
  57         NULL
  58 };
  59
  60 /***************************************************************************/
  61
  62 static void __init m5272_uarts_init(void)
  63 {
  64         u32 v;
  65
  66         /* Enable the output lines for the serial ports */
  67         v = readl(MCFSIM_PBCNT);
  68         v = (v & ~0x000000ff) | 0x00000055;
  69         writel(v, MCFSIM_PBCNT);
  70
  71         v = readl(MCFSIM_PDCNT);
  72         v = (v & ~0x000003fc) | 0x000002a8;
  73         writel(v, MCFSIM_PDCNT);
  74 }
  75
  76 /***************************************************************************/
  77
  78 static void m5272_cpu_reset(void)
  79 {
  80         local_irq_disable();
  81         /* Set watchdog to reset, and enabled */
  82         __raw_writew(0, MCFSIM_WIRR);
  83         __raw_writew(1, MCFSIM_WRRR);
  84         __raw_writew(0, MCFSIM_WCR);
  85         for (;;)
  86                 /* wait for watchdog to timeout */;
  87 }
  88
  89 /***************************************************************************/
  90
  91 void __init config_BSP(char *commandp, int size)
  92 {
  93 #if defined (CONFIG_MOD5272)
  94         /* Set base of device vectors to be 64 */
  95         writeb(0x40, MCFSIM_PIVR);
  96 #endif
  97
  98 #if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
  99         /* Copy command line from FLASH to local buffer... */
 100         memcpy(commandp, (char *) 0xf0004000, size);
 101         commandp[size-1] = 0;
 102 #elif defined(CONFIG_CANCam)
 103         /* Copy command line from FLASH to local buffer... */
 104         memcpy(commandp, (char *) 0xf0010000, size);
 105         commandp[size-1] = 0;
 106 #endif
 107
 108         mach_reset = m5272_cpu_reset;
 109         mach_sched_init = hw_timer_init;
 110 }
 111
 112 /***************************************************************************/
 113
 114 /*
 115  * Some 5272 based boards have the FEC ethernet directly connected to
 116  * an ethernet switch. In this case we need to use the fixed phy type,
 117  * and we need to declare it early in boot.
 118  */
 119 static struct fixed_phy_status nettel_fixed_phy_status __initdata = {
 120         .link   = 1,
 121         .speed  = 100,
 122         .duplex = 0,
 123 };
 124
 125 /***************************************************************************/
 126
 127 static int __init init_BSP(void)
 128 {
 129         m5272_uarts_init();
 130         fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status);
 131         return 0;
 132 }
 133
 134 arch_initcall(init_BSP);
 135
 136 /***************************************************************************/