arch/m68k/coldfire/m5441x.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *      m5441x.c -- support for Coldfire m5441x processors
   4  *
   5  *      (C) Copyright Steven King <sfking@fdwdc.com>
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/param.h>
  10 #include <linux/init.h>
  11 #include <linux/io.h>
  12 #include <linux/clk.h>
  13 #include <asm/machdep.h>
  14 #include <asm/coldfire.h>
  15 #include <asm/mcfsim.h>
  16 #include <asm/mcfuart.h>
  17 #include <asm/mcfdma.h>
  18 #include <asm/mcfclk.h>
  19
  20 DEFINE_CLK(0, "flexbus", 2, MCF_CLK);
  21 DEFINE_CLK(0, "mcfcan.0", 8, MCF_CLK);
  22 DEFINE_CLK(0, "mcfcan.1", 9, MCF_CLK);
  23 DEFINE_CLK(0, "imx1-i2c.1", 14, MCF_CLK);
  24 DEFINE_CLK(0, "mcfdspi.1", 15, MCF_CLK);
  25 DEFINE_CLK(0, "edma", 17, MCF_CLK);
  26 DEFINE_CLK(0, "intc.0", 18, MCF_CLK);
  27 DEFINE_CLK(0, "intc.1", 19, MCF_CLK);
  28 DEFINE_CLK(0, "intc.2", 20, MCF_CLK);
  29 DEFINE_CLK(0, "imx1-i2c.0", 22, MCF_CLK);
  30 DEFINE_CLK(0, "fsl-dspi.0", 23, MCF_CLK);
  31 DEFINE_CLK(0, "mcfuart.0", 24, MCF_BUSCLK);
  32 DEFINE_CLK(0, "mcfuart.1", 25, MCF_BUSCLK);
  33 DEFINE_CLK(0, "mcfuart.2", 26, MCF_BUSCLK);
  34 DEFINE_CLK(0, "mcfuart.3", 27, MCF_BUSCLK);
  35 DEFINE_CLK(0, "mcftmr.0", 28, MCF_CLK);
  36 DEFINE_CLK(0, "mcftmr.1", 29, MCF_CLK);
  37 DEFINE_CLK(0, "mcftmr.2", 30, MCF_CLK);
  38 DEFINE_CLK(0, "mcftmr.3", 31, MCF_CLK);
  39 DEFINE_CLK(0, "mcfpit.0", 32, MCF_CLK);
  40 DEFINE_CLK(0, "mcfpit.1", 33, MCF_CLK);
  41 DEFINE_CLK(0, "mcfpit.2", 34, MCF_CLK);
  42 DEFINE_CLK(0, "mcfpit.3", 35, MCF_CLK);
  43 DEFINE_CLK(0, "mcfeport.0", 37, MCF_CLK);
  44 DEFINE_CLK(0, "mcfadc.0", 38, MCF_CLK);
  45 DEFINE_CLK(0, "mcfdac.0", 39, MCF_CLK);
  46 DEFINE_CLK(0, "mcfrtc.0", 42, MCF_CLK);
  47 DEFINE_CLK(0, "mcfsim.0", 43, MCF_CLK);
  48 DEFINE_CLK(0, "mcfusb-otg.0", 44, MCF_CLK);
  49 DEFINE_CLK(0, "mcfusb-host.0", 45, MCF_CLK);
  50 DEFINE_CLK(0, "mcfddr-sram.0", 46, MCF_CLK);
  51 DEFINE_CLK(0, "mcfssi.0", 47, MCF_CLK);
  52 DEFINE_CLK(0, "pll.0", 48, MCF_CLK);
  53 DEFINE_CLK(0, "mcfrng.0", 49, MCF_CLK);
  54 DEFINE_CLK(0, "mcfssi.1", 50, MCF_CLK);
  55 DEFINE_CLK(0, "sdhci-esdhc-mcf.0", 51, MCF_CLK);
  56 DEFINE_CLK(0, "enet-fec.0", 53, MCF_CLK);
  57 DEFINE_CLK(0, "enet-fec.1", 54, MCF_CLK);
  58 DEFINE_CLK(0, "switch.0", 55, MCF_CLK);
  59 DEFINE_CLK(0, "switch.1", 56, MCF_CLK);
  60 DEFINE_CLK(0, "nand.0", 63, MCF_CLK);
  61
  62 DEFINE_CLK(1, "mcfow.0", 2, MCF_CLK);
  63 DEFINE_CLK(1, "imx1-i2c.2", 4, MCF_CLK);
  64 DEFINE_CLK(1, "imx1-i2c.3", 5, MCF_CLK);
  65 DEFINE_CLK(1, "imx1-i2c.4", 6, MCF_CLK);
  66 DEFINE_CLK(1, "imx1-i2c.5", 7, MCF_CLK);
  67 DEFINE_CLK(1, "mcfuart.4", 24, MCF_BUSCLK);
  68 DEFINE_CLK(1, "mcfuart.5", 25, MCF_BUSCLK);
  69 DEFINE_CLK(1, "mcfuart.6", 26, MCF_BUSCLK);
  70 DEFINE_CLK(1, "mcfuart.7", 27, MCF_BUSCLK);
  71 DEFINE_CLK(1, "mcfuart.8", 28, MCF_BUSCLK);
  72 DEFINE_CLK(1, "mcfuart.9", 29, MCF_BUSCLK);
  73 DEFINE_CLK(1, "mcfpwm.0", 34, MCF_BUSCLK);
  74 DEFINE_CLK(1, "sys.0", 36, MCF_BUSCLK);
  75 DEFINE_CLK(1, "gpio.0", 37, MCF_BUSCLK);
  76
  77 DEFINE_CLK(2, "ipg.0", 0, MCF_CLK);
  78 DEFINE_CLK(2, "ahb.0", 1, MCF_CLK);
  79 DEFINE_CLK(2, "per.0", 2, MCF_CLK);
  80
  81 struct clk *mcf_clks[] = {
  82         &__clk_0_2,
  83         &__clk_0_8,
  84         &__clk_0_9,
  85         &__clk_0_14,
  86         &__clk_0_15,
  87         &__clk_0_17,
  88         &__clk_0_18,
  89         &__clk_0_19,
  90         &__clk_0_20,
  91         &__clk_0_22,
  92         &__clk_0_23,
  93         &__clk_0_24,
  94         &__clk_0_25,
  95         &__clk_0_26,
  96         &__clk_0_27,
  97         &__clk_0_28,
  98         &__clk_0_29,
  99         &__clk_0_30,
 100         &__clk_0_31,
 101         &__clk_0_32,
 102         &__clk_0_33,
 103         &__clk_0_34,
 104         &__clk_0_35,
 105         &__clk_0_37,
 106         &__clk_0_38,
 107         &__clk_0_39,
 108         &__clk_0_42,
 109         &__clk_0_43,
 110         &__clk_0_44,
 111         &__clk_0_45,
 112         &__clk_0_46,
 113         &__clk_0_47,
 114         &__clk_0_48,
 115         &__clk_0_49,
 116         &__clk_0_50,
 117         &__clk_0_51,
 118         &__clk_0_53,
 119         &__clk_0_54,
 120         &__clk_0_55,
 121         &__clk_0_56,
 122         &__clk_0_63,
 123
 124         &__clk_1_2,
 125         &__clk_1_4,
 126         &__clk_1_5,
 127         &__clk_1_6,
 128         &__clk_1_7,
 129         &__clk_1_24,
 130         &__clk_1_25,
 131         &__clk_1_26,
 132         &__clk_1_27,
 133         &__clk_1_28,
 134         &__clk_1_29,
 135         &__clk_1_34,
 136         &__clk_1_36,
 137         &__clk_1_37,
 138
 139         &__clk_2_0,
 140         &__clk_2_1,
 141         &__clk_2_2,
 142
 143         NULL,
 144 };
 145
 146
 147 static struct clk * const enable_clks[] __initconst = {
 148         /* make sure these clocks are enabled */
 149         &__clk_0_15, /* dspi.1 */
 150         &__clk_0_17, /* eDMA */
 151         &__clk_0_18, /* intc0 */
 152         &__clk_0_19, /* intc0 */
 153         &__clk_0_20, /* intc0 */
 154         &__clk_0_23, /* dspi.0 */
 155         &__clk_0_24, /* uart0 */
 156         &__clk_0_25, /* uart1 */
 157         &__clk_0_26, /* uart2 */
 158         &__clk_0_27, /* uart3 */
 159
 160         &__clk_0_33, /* pit.1 */
 161         &__clk_0_37, /* eport */
 162         &__clk_0_48, /* pll */
 163         &__clk_0_51, /* esdhc */
 164
 165         &__clk_1_36, /* CCM/reset module/Power management */
 166         &__clk_1_37, /* gpio */
 167 };
 168 static struct clk * const disable_clks[] __initconst = {
 169         &__clk_0_8, /* can.0 */
 170         &__clk_0_9, /* can.1 */
 171         &__clk_0_14, /* i2c.1 */
 172         &__clk_0_22, /* i2c.0 */
 173         &__clk_0_23, /* dspi.0 */
 174         &__clk_0_28, /* tmr.1 */
 175         &__clk_0_29, /* tmr.2 */
 176         &__clk_0_30, /* tmr.2 */
 177         &__clk_0_31, /* tmr.3 */
 178         &__clk_0_32, /* pit.0 */
 179         &__clk_0_34, /* pit.2 */
 180         &__clk_0_35, /* pit.3 */
 181         &__clk_0_38, /* adc */
 182         &__clk_0_39, /* dac */
 183         &__clk_0_44, /* usb otg */
 184         &__clk_0_45, /* usb host */
 185         &__clk_0_47, /* ssi.0 */
 186         &__clk_0_49, /* rng */
 187         &__clk_0_50, /* ssi.1 */
 188         &__clk_0_51, /* eSDHC */
 189         &__clk_0_53, /* enet-fec */
 190         &__clk_0_54, /* enet-fec */
 191         &__clk_0_55, /* switch.0 */
 192         &__clk_0_56, /* switch.1 */
 193
 194         &__clk_1_2, /* 1-wire */
 195         &__clk_1_4, /* i2c.2 */
 196         &__clk_1_5, /* i2c.3 */
 197         &__clk_1_6, /* i2c.4 */
 198         &__clk_1_7, /* i2c.5 */
 199         &__clk_1_24, /* uart 4 */
 200         &__clk_1_25, /* uart 5 */
 201         &__clk_1_26, /* uart 6 */
 202         &__clk_1_27, /* uart 7 */
 203         &__clk_1_28, /* uart 8 */
 204         &__clk_1_29, /* uart 9 */
 205 };
 206
 207 static void __clk_enable2(struct clk *clk)
 208 {
 209         __raw_writel(__raw_readl(MCFSDHC_CLK) | (1 << clk->slot), MCFSDHC_CLK);
 210 }
 211
 212 static void __clk_disable2(struct clk *clk)
 213 {
 214         __raw_writel(__raw_readl(MCFSDHC_CLK) & ~(1 << clk->slot), MCFSDHC_CLK);
 215 }
 216
 217 struct clk_ops clk_ops2 = {
 218         .enable         = __clk_enable2,
 219         .disable        = __clk_disable2,
 220 };
 221
 222 static void __init m5441x_clk_init(void)
 223 {
 224         unsigned i;
 225
 226         for (i = 0; i < ARRAY_SIZE(enable_clks); ++i)
 227                 __clk_init_enabled(enable_clks[i]);
 228         /* make sure these clocks are disabled */
 229         for (i = 0; i < ARRAY_SIZE(disable_clks); ++i)
 230                 __clk_init_disabled(disable_clks[i]);
 231 }
 232
 233 static void __init m5441x_uarts_init(void)
 234 {
 235         __raw_writeb(0x0f, MCFGPIO_PAR_UART0);
 236         __raw_writeb(0x00, MCFGPIO_PAR_UART1);
 237         __raw_writeb(0x00, MCFGPIO_PAR_UART2);
 238 }
 239
 240 static void __init m5441x_fec_init(void)
 241 {
 242         __raw_writeb(0x03, MCFGPIO_PAR_FEC);
 243 }
 244
 245 void __init config_BSP(char *commandp, int size)
 246 {
 247         m5441x_clk_init();
 248         mach_sched_init = hw_timer_init;
 249         m5441x_uarts_init();
 250         m5441x_fec_init();
 251 }