arch/m68k/coldfire/m527x.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /***************************************************************************/
   3
   4 /*
   5  *      m527x.c  -- platform support for ColdFire 527x based boards
   6  *
   7  *      Sub-architcture dependent initialization code for the Freescale
   8  *      5270/5271 and 5274/5275 CPUs.
   9  *
  10  *      Copyright (C) 1999-2004, Greg Ungerer (gerg@snapgear.com)
  11  *      Copyright (C) 2001-2004, SnapGear Inc. (www.snapgear.com)
  12  */
  13
  14 /***************************************************************************/
  15
  16 #include <linux/kernel.h>
  17 #include <linux/param.h>
  18 #include <linux/init.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 DEFINE_CLK(fec1, "fec.1", MCF_BUSCLK);
  40 DEFINE_CLK(mcfi2c0, "imx1-i2c.0", MCF_BUSCLK);
  41
  42 struct clk *mcf_clks[] = {
  43         &clk_pll,
  44         &clk_sys,
  45         &clk_mcfpit0,
  46         &clk_mcfpit1,
  47         &clk_mcfpit2,
  48         &clk_mcfpit3,
  49         &clk_mcfuart0,
  50         &clk_mcfuart1,
  51         &clk_mcfuart2,
  52         &clk_mcfqspi0,
  53         &clk_fec0,
  54         &clk_fec1,
  55         &clk_mcfi2c0,
  56         NULL
  57 };
  58
  59 /***************************************************************************/
  60
  61 static void __init m527x_qspi_init(void)
  62 {
  63 #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
  64 #if defined(CONFIG_M5271)
  65         u16 par;
  66
  67         /* setup QSPS pins for QSPI with gpio CS control */
  68         writeb(0x1f, MCFGPIO_PAR_QSPI);
  69         /* and CS2 & CS3 as gpio */
  70         par = readw(MCFGPIO_PAR_TIMER);
  71         par &= 0x3f3f;
  72         writew(par, MCFGPIO_PAR_TIMER);
  73 #elif defined(CONFIG_M5275)
  74         /* setup QSPS pins for QSPI with gpio CS control */
  75         writew(0x003e, MCFGPIO_PAR_QSPI);
  76 #endif
  77 #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
  78 }
  79
  80 /***************************************************************************/
  81
  82 static void __init m527x_i2c_init(void)
  83 {
  84 #if IS_ENABLED(CONFIG_I2C_IMX)
  85 #if defined(CONFIG_M5271)
  86         u8 par;
  87
  88         /* setup Port FECI2C Pin Assignment Register for I2C */
  89         /*  set PAR_SCL to SCL and PAR_SDA to SDA */
  90         par = readb(MCFGPIO_PAR_FECI2C);
  91         par |= 0x0f;
  92         writeb(par, MCFGPIO_PAR_FECI2C);
  93 #elif defined(CONFIG_M5275)
  94         u16 par;
  95
  96         /* setup Port FECI2C Pin Assignment Register for I2C */
  97         /*  set PAR_SCL to SCL and PAR_SDA to SDA */
  98         par = readw(MCFGPIO_PAR_FECI2C);
  99         par |= 0x0f;
 100         writew(par, MCFGPIO_PAR_FECI2C);
 101 #endif
 102 #endif /* IS_ENABLED(CONFIG_I2C_IMX) */
 103 }
 104
 105 /***************************************************************************/
 106
 107 static void __init m527x_uarts_init(void)
 108 {
 109         u16 sepmask;
 110
 111         /*
 112          * External Pin Mask Setting & Enable External Pin for Interface
 113          */
 114         sepmask = readw(MCFGPIO_PAR_UART);
 115         sepmask |= UART0_ENABLE_MASK | UART1_ENABLE_MASK | UART2_ENABLE_MASK;
 116         writew(sepmask, MCFGPIO_PAR_UART);
 117 }
 118
 119 /***************************************************************************/
 120
 121 static void __init m527x_fec_init(void)
 122 {
 123         u8 v;
 124
 125         /* Set multi-function pins to ethernet mode for fec0 */
 126 #if defined(CONFIG_M5271)
 127         v = readb(MCFGPIO_PAR_FECI2C);
 128         writeb(v | 0xf0, MCFGPIO_PAR_FECI2C);
 129 #else
 130         u16 par;
 131
 132         par = readw(MCFGPIO_PAR_FECI2C);
 133         writew(par | 0xf00, MCFGPIO_PAR_FECI2C);
 134         v = readb(MCFGPIO_PAR_FEC0HL);
 135         writeb(v | 0xc0, MCFGPIO_PAR_FEC0HL);
 136
 137         /* Set multi-function pins to ethernet mode for fec1 */
 138         par = readw(MCFGPIO_PAR_FECI2C);
 139         writew(par | 0xa0, MCFGPIO_PAR_FECI2C);
 140         v = readb(MCFGPIO_PAR_FEC1HL);
 141         writeb(v | 0xc0, MCFGPIO_PAR_FEC1HL);
 142 #endif
 143 }
 144
 145 /***************************************************************************/
 146
 147 void __init config_BSP(char *commandp, int size)
 148 {
 149         mach_sched_init = hw_timer_init;
 150         m527x_uarts_init();
 151         m527x_fec_init();
 152         m527x_qspi_init();
 153         m527x_i2c_init();
 154 }
 155
 156 /***************************************************************************/