arch/m68k/coldfire/m528x.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      m528x.c  -- platform support for ColdFire 528x based boards
   5  *
   6  *      Sub-architcture dependent initialization code for the Freescale
   7  *      5280, 5281 and 5282 CPUs.
   8  *
   9  *      Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com)
  10  *      Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
  11  */
  12
  13 /***************************************************************************/
  14
  15 #include <linux/kernel.h>
  16 #include <linux/param.h>
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/io.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 DEFINE_CLK(pll, "pll.0", MCF_CLK);
  29 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
  30 DEFINE_CLK(mcfpit0, "mcfpit.0", MCF_CLK);
  31 DEFINE_CLK(mcfpit1, "mcfpit.1", MCF_CLK);
  32 DEFINE_CLK(mcfpit2, "mcfpit.2", MCF_CLK);
  33 DEFINE_CLK(mcfpit3, "mcfpit.3", MCF_CLK);
  34 DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
  35 DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
  36 DEFINE_CLK(mcfuart2, "mcfuart.2", MCF_BUSCLK);
  37 DEFINE_CLK(mcfqspi0, "mcfqspi.0", MCF_BUSCLK);
  38 DEFINE_CLK(fec0, "fec.0", MCF_BUSCLK);
  39
  40 struct clk *mcf_clks[] = {
  41         &clk_pll,
  42         &clk_sys,
  43         &clk_mcfpit0,
  44         &clk_mcfpit1,
  45         &clk_mcfpit2,
  46         &clk_mcfpit3,
  47         &clk_mcfuart0,
  48         &clk_mcfuart1,
  49         &clk_mcfuart2,
  50         &clk_mcfqspi0,
  51         &clk_fec0,
  52         NULL
  53 };
  54
  55 /***************************************************************************/
  56
  57 static void __init m528x_qspi_init(void)
  58 {
  59 #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
  60         /* setup Port QS for QSPI with gpio CS control */
  61         __raw_writeb(0x07, MCFGPIO_PQSPAR);
  62 #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
  63 }
  64
  65 /***************************************************************************/
  66
  67 static void __init m528x_uarts_init(void)
  68 {
  69         u8 port;
  70
  71         /* make sure PUAPAR is set for UART0 and UART1 */
  72         port = readb(MCFGPIO_PUAPAR);
  73         port |= 0x03 | (0x03 << 2);
  74         writeb(port, MCFGPIO_PUAPAR);
  75 }
  76
  77 /***************************************************************************/
  78
  79 static void __init m528x_fec_init(void)
  80 {
  81         u16 v16;
  82
  83         /* Set multi-function pins to ethernet mode for fec0 */
  84         v16 = readw(MCFGPIO_PASPAR);
  85         writew(v16 | 0xf00, MCFGPIO_PASPAR);
  86         writeb(0xc0, MCFGPIO_PEHLPAR);
  87 }
  88
  89 /***************************************************************************/
  90
  91 #ifdef CONFIG_WILDFIRE
  92 void wildfire_halt(void)
  93 {
  94         writeb(0, 0x30000007);
  95         writeb(0x2, 0x30000007);
  96 }
  97 #endif
  98
  99 #ifdef CONFIG_WILDFIREMOD
 100 void wildfiremod_halt(void)
 101 {
 102         printk(KERN_INFO "WildFireMod hibernating...\n");
 103
 104         /* Set portE.5 to Digital IO */
 105         MCF5282_GPIO_PEPAR &= ~(1 << (5 * 2));
 106
 107         /* Make portE.5 an output */
 108         MCF5282_GPIO_DDRE |= (1 << 5);
 109
 110         /* Now toggle portE.5 from low to high */
 111         MCF5282_GPIO_PORTE &= ~(1 << 5);
 112         MCF5282_GPIO_PORTE |= (1 << 5);
 113
 114         printk(KERN_EMERG "Failed to hibernate. Halting!\n");
 115 }
 116 #endif
 117
 118 void __init config_BSP(char *commandp, int size)
 119 {
 120 #ifdef CONFIG_WILDFIRE
 121         mach_halt = wildfire_halt;
 122 #endif
 123 #ifdef CONFIG_WILDFIREMOD
 124         mach_halt = wildfiremod_halt;
 125 #endif
 126         mach_sched_init = hw_timer_init;
 127         m528x_uarts_init();
 128         m528x_fec_init();
 129         m528x_qspi_init();
 130 }
 131
 132 /***************************************************************************/