arch/m68k/coldfire/m520x.c

   1 /***************************************************************************/
   2
   3 /*
   4  *  m520x.c  -- platform support for ColdFire 520x based boards
   5  *
   6  *  Copyright (C) 2005,      Freescale (www.freescale.com)
   7  *  Copyright (C) 2005,      Intec Automation (mike@steroidmicros.com)
   8  *  Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com)
   9  *  Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
  10  */
  11
  12 /***************************************************************************/
  13
  14 #include <linux/kernel.h>
  15 #include <linux/param.h>
  16 #include <linux/init.h>
  17 #include <linux/io.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 DEFINE_CLK(0, "flexbus", 2, MCF_CLK);
  27 DEFINE_CLK(0, "fec.0", 12, MCF_CLK);
  28 DEFINE_CLK(0, "edma", 17, MCF_CLK);
  29 DEFINE_CLK(0, "intc.0", 18, MCF_CLK);
  30 DEFINE_CLK(0, "iack.0", 21, MCF_CLK);
  31 DEFINE_CLK(0, "mcfi2c.0", 22, MCF_CLK);
  32 DEFINE_CLK(0, "mcfqspi.0", 23, MCF_CLK);
  33 DEFINE_CLK(0, "mcfuart.0", 24, MCF_BUSCLK);
  34 DEFINE_CLK(0, "mcfuart.1", 25, MCF_BUSCLK);
  35 DEFINE_CLK(0, "mcfuart.2", 26, MCF_BUSCLK);
  36 DEFINE_CLK(0, "mcftmr.0", 28, MCF_CLK);
  37 DEFINE_CLK(0, "mcftmr.1", 29, MCF_CLK);
  38 DEFINE_CLK(0, "mcftmr.2", 30, MCF_CLK);
  39 DEFINE_CLK(0, "mcftmr.3", 31, MCF_CLK);
  40
  41 DEFINE_CLK(0, "mcfpit.0", 32, MCF_CLK);
  42 DEFINE_CLK(0, "mcfpit.1", 33, MCF_CLK);
  43 DEFINE_CLK(0, "mcfeport.0", 34, MCF_CLK);
  44 DEFINE_CLK(0, "mcfwdt.0", 35, MCF_CLK);
  45 DEFINE_CLK(0, "pll.0", 36, MCF_CLK);
  46 DEFINE_CLK(0, "sys.0", 40, MCF_BUSCLK);
  47 DEFINE_CLK(0, "gpio.0", 41, MCF_BUSCLK);
  48 DEFINE_CLK(0, "sdram.0", 42, MCF_CLK);
  49
  50 struct clk *mcf_clks[] = {
  51         &__clk_0_2, /* flexbus */
  52         &__clk_0_12, /* fec.0 */
  53         &__clk_0_17, /* edma */
  54         &__clk_0_18, /* intc.0 */
  55         &__clk_0_21, /* iack.0 */
  56         &__clk_0_22, /* mcfi2c.0 */
  57         &__clk_0_23, /* mcfqspi.0 */
  58         &__clk_0_24, /* mcfuart.0 */
  59         &__clk_0_25, /* mcfuart.1 */
  60         &__clk_0_26, /* mcfuart.2 */
  61         &__clk_0_28, /* mcftmr.0 */
  62         &__clk_0_29, /* mcftmr.1 */
  63         &__clk_0_30, /* mcftmr.2 */
  64         &__clk_0_31, /* mcftmr.3 */
  65
  66         &__clk_0_32, /* mcfpit.0 */
  67         &__clk_0_33, /* mcfpit.1 */
  68         &__clk_0_34, /* mcfeport.0 */
  69         &__clk_0_35, /* mcfwdt.0 */
  70         &__clk_0_36, /* pll.0 */
  71         &__clk_0_40, /* sys.0 */
  72         &__clk_0_41, /* gpio.0 */
  73         &__clk_0_42, /* sdram.0 */
  74 NULL,
  75 };
  76
  77 static struct clk * const enable_clks[] __initconst = {
  78         &__clk_0_2, /* flexbus */
  79         &__clk_0_18, /* intc.0 */
  80         &__clk_0_21, /* iack.0 */
  81         &__clk_0_24, /* mcfuart.0 */
  82         &__clk_0_25, /* mcfuart.1 */
  83         &__clk_0_26, /* mcfuart.2 */
  84
  85         &__clk_0_32, /* mcfpit.0 */
  86         &__clk_0_33, /* mcfpit.1 */
  87         &__clk_0_34, /* mcfeport.0 */
  88         &__clk_0_36, /* pll.0 */
  89         &__clk_0_40, /* sys.0 */
  90         &__clk_0_41, /* gpio.0 */
  91         &__clk_0_42, /* sdram.0 */
  92 };
  93
  94 static struct clk * const disable_clks[] __initconst = {
  95         &__clk_0_12, /* fec.0 */
  96         &__clk_0_17, /* edma */
  97         &__clk_0_22, /* mcfi2c.0 */
  98         &__clk_0_23, /* mcfqspi.0 */
  99         &__clk_0_28, /* mcftmr.0 */
 100         &__clk_0_29, /* mcftmr.1 */
 101         &__clk_0_30, /* mcftmr.2 */
 102         &__clk_0_31, /* mcftmr.3 */
 103         &__clk_0_35, /* mcfwdt.0 */
 104 };
 105
 106
 107 static void __init m520x_clk_init(void)
 108 {
 109         unsigned i;
 110
 111         /* make sure these clocks are enabled */
 112         for (i = 0; i < ARRAY_SIZE(enable_clks); ++i)
 113                 __clk_init_enabled(enable_clks[i]);
 114         /* make sure these clocks are disabled */
 115         for (i = 0; i < ARRAY_SIZE(disable_clks); ++i)
 116                 __clk_init_disabled(disable_clks[i]);
 117 }
 118
 119 /***************************************************************************/
 120
 121 static void __init m520x_qspi_init(void)
 122 {
 123 #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
 124         u16 par;
 125         /* setup Port QS for QSPI with gpio CS control */
 126         writeb(0x3f, MCF_GPIO_PAR_QSPI);
 127         /* make U1CTS and U2RTS gpio for cs_control */
 128         par = readw(MCF_GPIO_PAR_UART);
 129         par &= 0x00ff;
 130         writew(par, MCF_GPIO_PAR_UART);
 131 #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
 132 }
 133
 134 /***************************************************************************/
 135
 136 static void __init m520x_uarts_init(void)
 137 {
 138         u16 par;
 139         u8 par2;
 140
 141         /* UART0 and UART1 GPIO pin setup */
 142         par = readw(MCF_GPIO_PAR_UART);
 143         par |= MCF_GPIO_PAR_UART_PAR_UTXD0 | MCF_GPIO_PAR_UART_PAR_URXD0;
 144         par |= MCF_GPIO_PAR_UART_PAR_UTXD1 | MCF_GPIO_PAR_UART_PAR_URXD1;
 145         writew(par, MCF_GPIO_PAR_UART);
 146
 147         /* UART1 GPIO pin setup */
 148         par2 = readb(MCF_GPIO_PAR_FECI2C);
 149         par2 &= ~0x0F;
 150         par2 |= MCF_GPIO_PAR_FECI2C_PAR_SCL_UTXD2 |
 151                 MCF_GPIO_PAR_FECI2C_PAR_SDA_URXD2;
 152         writeb(par2, MCF_GPIO_PAR_FECI2C);
 153 }
 154
 155 /***************************************************************************/
 156
 157 static void __init m520x_fec_init(void)
 158 {
 159         u8 v;
 160
 161         /* Set multi-function pins to ethernet mode */
 162         v = readb(MCF_GPIO_PAR_FEC);
 163         writeb(v | 0xf0, MCF_GPIO_PAR_FEC);
 164
 165         v = readb(MCF_GPIO_PAR_FECI2C);
 166         writeb(v | 0x0f, MCF_GPIO_PAR_FECI2C);
 167 }
 168
 169 /***************************************************************************/
 170
 171 void __init config_BSP(char *commandp, int size)
 172 {
 173         mach_sched_init = hw_timer_init;
 174         m520x_clk_init();
 175         m520x_uarts_init();
 176         m520x_fec_init();
 177         m520x_qspi_init();
 178 }
 179
 180 /***************************************************************************/