arch/m68k/coldfire/m5249.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /***************************************************************************/
   3
   4 /*
   5  *      m5249.c  -- platform support for ColdFire 5249 based boards
   6  *
   7  *      Copyright (C) 2002, Greg Ungerer (gerg@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/platform_device.h>
  17 #include <asm/machdep.h>
  18 #include <asm/coldfire.h>
  19 #include <asm/mcfsim.h>
  20 #include <asm/mcfclk.h>
  21
  22 /***************************************************************************/
  23
  24 DEFINE_CLK(pll, "pll.0", MCF_CLK);
  25 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
  26 DEFINE_CLK(mcftmr0, "mcftmr.0", MCF_BUSCLK);
  27 DEFINE_CLK(mcftmr1, "mcftmr.1", MCF_BUSCLK);
  28 DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
  29 DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
  30 DEFINE_CLK(mcfqspi0, "mcfqspi.0", MCF_BUSCLK);
  31 DEFINE_CLK(mcfi2c0, "imx1-i2c.0", MCF_BUSCLK);
  32 DEFINE_CLK(mcfi2c1, "imx1-i2c.1", MCF_BUSCLK);
  33
  34 struct clk *mcf_clks[] = {
  35         &clk_pll,
  36         &clk_sys,
  37         &clk_mcftmr0,
  38         &clk_mcftmr1,
  39         &clk_mcfuart0,
  40         &clk_mcfuart1,
  41         &clk_mcfqspi0,
  42         &clk_mcfi2c0,
  43         &clk_mcfi2c1,
  44         NULL
  45 };
  46
  47 /***************************************************************************/
  48
  49 #ifdef CONFIG_M5249C3
  50
  51 static struct resource m5249_smc91x_resources[] = {
  52         {
  53                 .start          = 0xe0000300,
  54                 .end            = 0xe0000300 + 0x100,
  55                 .flags          = IORESOURCE_MEM,
  56         },
  57         {
  58                 .start          = MCF_IRQ_GPIO6,
  59                 .end            = MCF_IRQ_GPIO6,
  60                 .flags          = IORESOURCE_IRQ,
  61         },
  62 };
  63
  64 static struct platform_device m5249_smc91x = {
  65         .name                   = "smc91x",
  66         .id                     = 0,
  67         .num_resources          = ARRAY_SIZE(m5249_smc91x_resources),
  68         .resource               = m5249_smc91x_resources,
  69 };
  70
  71 #endif /* CONFIG_M5249C3 */
  72
  73 static struct platform_device *m5249_devices[] __initdata = {
  74 #ifdef CONFIG_M5249C3
  75         &m5249_smc91x,
  76 #endif
  77 };
  78
  79 /***************************************************************************/
  80
  81 static void __init m5249_qspi_init(void)
  82 {
  83 #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
  84         /* QSPI irq setup */
  85         writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL4 | MCFSIM_ICR_PRI0,
  86                MCFSIM_QSPIICR);
  87         mcf_mapirq2imr(MCF_IRQ_QSPI, MCFINTC_QSPI);
  88 #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
  89 }
  90
  91 /***************************************************************************/
  92
  93 static void __init m5249_i2c_init(void)
  94 {
  95 #if IS_ENABLED(CONFIG_I2C_IMX)
  96         u32 r;
  97
  98         /* first I2C controller uses regular irq setup */
  99         writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL5 | MCFSIM_ICR_PRI0,
 100                MCFSIM_I2CICR);
 101         mcf_mapirq2imr(MCF_IRQ_I2C0, MCFINTC_I2C);
 102
 103         /* second I2C controller is completely different */
 104         r = readl(MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
 105         r &= ~MCFINTC2_INTPRI_BITS(0xf, MCF_IRQ_I2C1);
 106         r |= MCFINTC2_INTPRI_BITS(0x5, MCF_IRQ_I2C1);
 107         writel(r, MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
 108 #endif /* CONFIG_I2C_IMX */
 109 }
 110
 111 /***************************************************************************/
 112
 113 #ifdef CONFIG_M5249C3
 114
 115 static void __init m5249_smc91x_init(void)
 116 {
 117         u32  gpio;
 118
 119         /* Set the GPIO line as interrupt source for smc91x device */
 120         gpio = readl(MCFSIM2_GPIOINTENABLE);
 121         writel(gpio | 0x40, MCFSIM2_GPIOINTENABLE);
 122
 123         gpio = readl(MCFINTC2_INTPRI5);
 124         writel(gpio | 0x04000000, MCFINTC2_INTPRI5);
 125 }
 126
 127 #endif /* CONFIG_M5249C3 */
 128
 129 /***************************************************************************/
 130
 131 void __init config_BSP(char *commandp, int size)
 132 {
 133         mach_sched_init = hw_timer_init;
 134
 135 #ifdef CONFIG_M5249C3
 136         m5249_smc91x_init();
 137 #endif
 138         m5249_qspi_init();
 139         m5249_i2c_init();
 140 }
 141
 142 /***************************************************************************/
 143
 144 static int __init init_BSP(void)
 145 {
 146         platform_add_devices(m5249_devices, ARRAY_SIZE(m5249_devices));
 147         return 0;
 148 }
 149
 150 arch_initcall(init_BSP);
 151
 152 /***************************************************************************/