text: // SPDX-License-Identifier: GPL-2.0
  /*
   * board/renesas/koelsch/koelsch_spl.c
   *
   * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
   */
  
  #include <common.h>
  #include <cpu_func.h>
  #include <init.h>
  #include <malloc.h>
  #include <dm/platform_data/serial_sh.h>
  #include <asm/processor.h>
  #include <asm/mach-types.h>
  #include <asm/io.h>
  #include <linux/bitops.h>
  #include <linux/errno.h>
  #include <asm/arch/sys_proto.h>
  #include <asm/gpio.h>
  #include <asm/arch/rmobile.h>
  #include <asm/arch/rcar-mstp.h>
  
  #include <spl.h>
  
  #define TMU0_MSTP125	BIT(25)
  #define SCIF0_MSTP721	BIT(21)
  #define QSPI_MSTP917	BIT(17)
  
  #define SD2CKCR		0xE615026C
  #define SD_97500KHZ	0x7
  
  struct reg_config {
  	u16	off;
  	u32	val;
  };
  
  static void dbsc_wait(u16 reg)
  {
  	static const u32 dbsc3_0_base = DBSC3_0_BASE;
  	static const u32 dbsc3_1_base = DBSC3_0_BASE + 0x10000;
  
  	while (!(readl(dbsc3_0_base + reg) & BIT(0)))
  		;
  
  	while (!(readl(dbsc3_1_base + reg) & BIT(0)))
  		;
  }
  
  static void spl_init_sys(void)
  {
  	u32 r0 = 0;
  
  	writel(0xa5a5a500, 0xe6020004);
  	writel(0xa5a5a500, 0xe6030004);
  
  	asm volatile(
  		/* ICIALLU - Invalidate I$ to PoU */
  		"mcr	15, 0, %0, cr7, cr5, 0	\n"
  		/* BPIALL - Invalidate branch predictors */
  		"mcr	15, 0, %0, cr7, cr5, 6	\n"
  		/* Set SCTLR[IZ] */
  		"mrc	15, 0, %0, cr1, cr0, 0	\n"
  		"orr	%0, #0x1800		\n"
  		"mcr	15, 0, %0, cr1, cr0, 0	\n"
  		"isb	sy			\n"
  		:"=r"(r0));
  }
  
  static void spl_init_pfc(void)
  {
  	static const struct reg_config pfc_with_unlock[] = {
  		{ 0x0090, 0x60000000 },
  		{ 0x0094, 0x60000000 },
  		{ 0x0098, 0x00800200 },
  		{ 0x009c, 0x00000000 },
  		{ 0x0020, 0x00000000 },
  		{ 0x0024, 0x00000000 },
  		{ 0x0028, 0x000244c8 },
  		{ 0x002c, 0x00000000 },
  		{ 0x0030, 0x00002400 },
  		{ 0x0034, 0x01520000 },
  		{ 0x0038, 0x00724003 },
  		{ 0x003c, 0x00000000 },
  		{ 0x0040, 0x00000000 },
  		{ 0x0044, 0x00000000 },
  		{ 0x0048, 0x00000000 },
  		{ 0x004c, 0x00000000 },
  		{ 0x0050, 0x00000000 },
  		{ 0x0054, 0x00000000 },
  		{ 0x0058, 0x00000000 },
  		{ 0x005c, 0x00000000 },
  		{ 0x0160, 0x00000000 },
  		{ 0x0004, 0xffffffff },
  		{ 0x0008, 0x00ec3fff },
  		{ 0x000c, 0x3bc001e7 },
  		{ 0x0010, 0x5bffffff },
  		{ 0x0014, 0x1ffffffb },
  		{ 0x0018, 0x01bffff0 },
  		{ 0x001c, 0xcf7fffff },
  		{ 0x0074, 0x0381fc00 },
  	};
  
  	static const struct reg_config pfc_without_unlock[] = {
  		{ 0x0100, 0xffffffdf },
  		{ 0x0104, 0xc883c3ff },
  		{ 0x0108, 0x1201f3c9 },
  		{ 0x010c, 0x00000000 },
  		{ 0x0110, 0xffffeb04 },
  		{ 0x0114, 0xc003ffff },
  		{ 0x0118, 0x0800000f },
  		{ 0x011c, 0x001800f0 },
  	};
  
  	static const u32 pfc_base = 0xe6060000;
  
  	unsigned int i;
  
  	for (i = 0; i < ARRAY_SIZE(pfc_with_unlock); i++) {
  		writel(~pfc_with_unlock[i].val, pfc_base);
  		writel(pfc_with_unlock[i].val,
  		       pfc_base | pfc_with_unlock[i].off);
  	}
  
  	for (i = 0; i < ARRAY_SIZE(pfc_without_unlock); i++)
  		writel(pfc_without_unlock[i].val,
  		       pfc_base | pfc_without_unlock[i].off);
  }
  
  static void spl_init_gpio(void)
  {
  	static const u16 gpio_offs[] = {
  		0x1000, 0x2000, 0x3000, 0x4000, 0x5000, 0x5400, 0x5800
  	};
  
  	static const struct reg_config gpio_set[] = {
  		{ 0x2000, 0x04381000 },
  		{ 0x5000, 0x00000000 },
  		{ 0x5800, 0x000e0000 },
  
  	};
  
  	static const struct reg_config gpio_clr[] = {
  		{ 0x1000, 0x00000000 },
  		{ 0x2000, 0x04381010 },
  		{ 0x3000, 0x00000000 },
  		{ 0x4000, 0x00000000 },
  		{ 0x5000, 0x00400000 },
  		{ 0x5400, 0x00000000 },
  		{ 0x5800, 0x000e0380 },
  	};
  
  	static const u32 gpio_base = 0xe6050000;
  
  	unsigned int i;
  
  	for (i = 0; i < ARRAY_SIZE(gpio_offs); i++)
  		writel(0, gpio_base | 0x20 | gpio_offs[i]);
  
  	for (i = 0; i < ARRAY_SIZE(gpio_offs); i++)
  		writel(0, gpio_base | 0x00 | gpio_offs[i]);
  
  	for (i = 0; i < ARRAY_SIZE(gpio_set); i++)
  		writel(gpio_set[i].val, gpio_base | 0x08 | gpio_set[i].off);
  
  	for (i = 0; i < ARRAY_SIZE(gpio_clr); i++)
  		writel(gpio_clr[i].val, gpio_base | 0x04 | gpio_clr[i].off);
  }
  
  static void spl_init_lbsc(void)
  {
  	static const struct reg_config lbsc_config[] = {
  		{ 0x00, 0x00000020 },
  		{ 0x08, 0x00002020 },
  		{ 0x30, 0x2a103320 },
  		{ 0x38, 0xff70ff70 },
  	};
  
  	static const u16 lbsc_offs[] = {
  		0x80, 0x84, 0x88, 0x8c, 0xa0, 0xc0, 0xc4, 0xc8, 0x180
  	};
  
  	static const u32 lbsc_base = 0xfec00200;
  
  	unsigned int i;
  
  	for (i = 0; i < ARRAY_SIZE(lbsc_config); i++) {
  		writel(lbsc_config[i].val,
  		       lbsc_base | lbsc_config[i].off);
  		writel(lbsc_config[i].val,
  		       lbsc_base | (lbsc_config[i].off + 4));
  	}
  
  	for (i = 0; i < ARRAY_SIZE(lbsc_offs); i++)
  		writel(0, lbsc_base | lbsc_offs[i]);
  }
  
  static void spl_init_dbsc(void)
  {
  	static const struct reg_config dbsc_config1[] = {
  		{ 0x0018, 0x21000000 },
  		{ 0x0018, 0x11000000 },
  		{ 0x0018, 0x10000000 },
  		{ 0x0280, 0x0000a55a },
  		{ 0x0290, 0x00000010 },
  		{ 0x02a0, 0xf004649b },
  		{ 0x0020, 0x00000007 },
  		{ 0x0024, 0x0f030a02 },
  		{ 0x0030, 0x00000001 },
  		{ 0x00b0, 0x00000000 },
  		{ 0x0040, 0x0000000b },
  		{ 0x0044, 0x00000008 },
  		{ 0x0048, 0x00000000 },
  		{ 0x0050, 0x0000000b },
  		{ 0x0054, 0x000c000b },
  		{ 0x0058, 0x00000027 },
  		{ 0x005c, 0x0000001c },
  		{ 0x0060, 0x00000006 },
  		{ 0x0064, 0x00000020 },
  		{ 0x0068, 0x00000008 },
  		{ 0x006c, 0x0000000c },
  		{ 0x0070, 0x00000009 },
  		{ 0x0074, 0x00000012 },
  		{ 0x0078, 0x000000d0 },
  		{ 0x007c, 0x00140005 },
  		{ 0x0080, 0x00050004 },
  		{ 0x0084, 0x70233005 },
  		{ 0x0088, 0x000c0000 },
  		{ 0x008c, 0x00000300 },
  		{ 0x0090, 0x00000040 },
  		{ 0x0100, 0x00000001 },
  		{ 0x00c0, 0x00020001 },
  		{ 0x00c8, 0x20082008 },
  		{ 0x0380, 0x00020002 },
  		{ 0x0390, 0x0000001f },
  	};
  
  	static const struct reg_config dbsc_config5[] = {
  		{ 0x0244, 0x00000011 },
  		{ 0x0290, 0x00000006 },
  		{ 0x02a0, 0x0005c000 },
  		{ 0x0290, 0x00000003 },
  		{ 0x02a0, 0x0300c481 },
  		{ 0x0290, 0x00000023 },
  		{ 0x02a0, 0x00fdb6c0 },
  		{ 0x0290, 0x00000011 },
  		{ 0x02a0, 0x1000040b },
  		{ 0x0290, 0x00000012 },
  		{ 0x02a0, 0x9d9cbb66 },
  		{ 0x0290, 0x00000013 },
  		{ 0x02a0, 0x1a868400 },
  		{ 0x0290, 0x00000014 },
  		{ 0x02a0, 0x300214d8 },
  		{ 0x0290, 0x00000015 },
  		{ 0x02a0, 0x00000d70 },
  		{ 0x0290, 0x00000016 },
  		{ 0x02a0, 0x00000006 },
  		{ 0x0290, 0x00000017 },
  		{ 0x02a0, 0x00000018 },
  		{ 0x0290, 0x0000001a },
  		{ 0x02a0, 0x910035c7 },
  		{ 0x0290, 0x00000004 },
  	};
  
  	static const struct reg_config dbsc_config6[] = {
  		{ 0x0290, 0x00000001 },
  		{ 0x02a0, 0x00000181 },
  		{ 0x0018, 0x11000000 },
  		{ 0x0290, 0x00000004 },
  	};
  
  	static const struct reg_config dbsc_config7[] = {
  		{ 0x0290, 0x00000001 },
  		{ 0x02a0, 0x0000fe01 },
  		{ 0x0290, 0x00000004 },
  	};
  
  	static const struct reg_config dbsc_config8[] = {
  		{ 0x0304, 0x00000000 },
  		{ 0x00f4, 0x01004c20 },
  		{ 0x00f8, 0x014000aa },
  		{ 0x00e0, 0x00000140 },
  		{ 0x00e4, 0x00081860 },
  		{ 0x00e8, 0x00010000 },
  		{ 0x0014, 0x00000001 },
  		{ 0x0010, 0x00000001 },
  		{ 0x0280, 0x00000000 },
  	};
  
  	static const u32 dbsc3_0_base = DBSC3_0_BASE;
  	static const u32 dbsc3_1_base = DBSC3_0_BASE + 0x10000;
  	unsigned int i;
  
  	for (i = 0; i < ARRAY_SIZE(dbsc_config1); i++) {
  		writel(dbsc_config1[i].val, dbsc3_0_base | dbsc_config1[i].off);
  		writel(dbsc_config1[i].val, dbsc3_1_base | dbsc_config1[i].off);
  	}
  
  	dbsc_wait(0x240);
  
  	for (i = 0; i < ARRAY_SIZE(dbsc_config5); i++) {
  		writel(dbsc_config5[i].val, dbsc3_0_base | dbsc_config5[i].off);
  		writel(dbsc_config5[i].val, dbsc3_1_base | dbsc_config5[i].off);
  	}
  
  	dbsc_wait(0x2a0);
  
  	for (i = 0; i < ARRAY_SIZE(dbsc_config6); i++) {
  		writel(dbsc_config6[i].val, dbsc3_0_base | dbsc_config6[i].off);
  		writel(dbsc_config6[i].val, dbsc3_1_base | dbsc_config6[i].off);
  	}
  
  	dbsc_wait(0x2a0);
  
  	for (i = 0; i < ARRAY_SIZE(dbsc_config7); i++) {
  		writel(dbsc_config7[i].val, dbsc3_0_base | dbsc_config7[i].off);
  		writel(dbsc_config7[i].val, dbsc3_1_base | dbsc_config7[i].off);
  	}
  
  	dbsc_wait(0x2a0);
  
  	for (i = 0; i < ARRAY_SIZE(dbsc_config8); i++) {
  		writel(dbsc_config8[i].val, dbsc3_0_base | dbsc_config8[i].off);
  		writel(dbsc_config8[i].val, dbsc3_1_base | dbsc_config8[i].off);
  	}
  
  }
  
  static void spl_init_qspi(void)
  {
  	mstp_clrbits_le32(MSTPSR9, SMSTPCR9, QSPI_MSTP917);
  
  	static const u32 qspi_base = 0xe6b10000;
  
  	writeb(0x08, qspi_base + 0x00);
  	writeb(0x00, qspi_base + 0x01);
  	writeb(0x06, qspi_base + 0x02);
  	writeb(0x01, qspi_base + 0x0a);
  	writeb(0x00, qspi_base + 0x0b);
  	writeb(0x00, qspi_base + 0x0c);
  	writeb(0x00, qspi_base + 0x0d);
  	writeb(0x00, qspi_base + 0x0e);
  
  	writew(0xe080, qspi_base + 0x10);
  
  	writeb(0xc0, qspi_base + 0x18);
  	writeb(0x00, qspi_base + 0x18);
  	writeb(0x00, qspi_base + 0x08);
  	writeb(0x48, qspi_base + 0x00);
  }
  
  void board_init_f(ulong dummy)
  {
  	int i;
  
  	mstp_clrbits_le32(MSTPSR1, SMSTPCR1, TMU0_MSTP125);
  	mstp_clrbits_le32(MSTPSR7, SMSTPCR7, SCIF0_MSTP721);
  
  	/*
  	 * SD0 clock is set to 97.5MHz by default.
  	 * Set SD2 to the 97.5MHz as well.
  	 */
  	writel(SD_97500KHZ, SD2CKCR);
  
  	spl_init_sys();
  	spl_init_pfc();
  	spl_init_gpio();
  	spl_init_lbsc();
  
  	/* Unknown, likely ES1.0-specific delay */
  	for (i = 0; i < 100000; i++)
  		asm volatile("nop");
  
  	spl_init_dbsc();
  	spl_init_qspi();
  }
  
  void spl_board_init(void)
  {
  	/* UART clocks enabled and gd valid - init serial console */
  	preloader_console_init();
  }
  
  void board_boot_order(u32 *spl_boot_list)
  {
  	const u32 jtag_magic = 0x1337c0de;
  	const u32 load_magic = 0xb33fc0de;
  
  	/*
  	 * If JTAG probe sets special word at 0xe6300020, then it must
  	 * put U-Boot into RAM and SPL will start it from RAM.
  	 */
  	if (readl(CONFIG_SPL_TEXT_BASE + 0x20) == jtag_magic) {
  		printf("JTAG boot detected!\n");
  
  		while (readl(CONFIG_SPL_TEXT_BASE + 0x24) != load_magic)
  			;
  
  		spl_boot_list[0] = BOOT_DEVICE_RAM;
  		spl_boot_list[1] = BOOT_DEVICE_NONE;
  
  		return;
  	}
  
  	/* Boot from SPI NOR with YMODEM UART fallback. */
  	spl_boot_list[0] = BOOT_DEVICE_SPI;
  	spl_boot_list[1] = BOOT_DEVICE_UART;
  	spl_boot_list[2] = BOOT_DEVICE_NONE;
  }
  
  void reset_cpu(ulong addr)
  {
  }
  