Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 361 insertions, 0 deletions

diff --git a/roms/u-boot/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/roms/u-boot/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
new file mode 100644
index 000000000..a94803ee9
--- /dev/null
+++ b/roms/u-boot/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
@@ -0,0 +1,361 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Freescale i.MX28 RAM init
+ *
+ * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
+ * on behalf of DENX Software Engineering GmbH
+ */
+
+#include <common.h>
+#include <config.h>
+#include <init.h>
+#include <log.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+#include <linux/compiler.h>
+
+#include "mxs_init.h"
+
+__weak uint32_t mxs_dram_vals[] = {
+/*
+ * i.MX28 DDR2 at 200MHz
+ */
+#if defined(CONFIG_MX28)
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000100, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00010101, 0x01010101,
+	0x000f0f01, 0x0f02020a, 0x00000000, 0x00010101,
+	0x00000100, 0x00000100, 0x00000000, 0x00000002,
+	0x01010000, 0x07080403, 0x06005003, 0x0a0000c8,
+	0x02009c40, 0x0002030c, 0x0036a609, 0x031a0612,
+	0x02030202, 0x00c8001c, 0x00000000, 0x00000000,
+	0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
+	0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
+	0x00000003, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000612, 0x01000F02,
+	0x06120612, 0x00000200, 0x00020007, 0xf4004a27,
+	0xf4004a27, 0xf4004a27, 0xf4004a27, 0x07000300,
+	0x07000300, 0x07400300, 0x07400300, 0x00000005,
+	0x00000000, 0x00000000, 0x01000000, 0x01020408,
+	0x08040201, 0x000f1133, 0x00000000, 0x00001f04,
+	0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04,
+	0x00001f04, 0x00001f04, 0x00001f04, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00010000, 0x00030404,
+	0x00000003, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x01010000,
+	0x01000000, 0x03030000, 0x00010303, 0x01020202,
+	0x00000000, 0x02040303, 0x21002103, 0x00061200,
+	0x06120612, 0x04420442, 0x04420442, 0x00040004,
+	0x00040004, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0xffffffff
+
+/*
+ * i.MX23 DDR at 133MHz
+ */
+#elif defined(CONFIG_MX23)
+	0x01010001, 0x00010100, 0x01000101, 0x00000001,
+	0x00000101, 0x00000000, 0x00010000, 0x01000001,
+	0x00000000, 0x00000001, 0x07000200, 0x00070202,
+	0x02020000, 0x04040a01, 0x00000201, 0x02040000,
+	0x02000000, 0x19000f08, 0x0d0d0000, 0x02021313,
+	0x02061521, 0x0000000a, 0x00080008, 0x00200020,
+	0x00200020, 0x00200020, 0x000003f7, 0x00000000,
+	0x00000000, 0x00000020, 0x00000020, 0x00c80000,
+	0x000a23cd, 0x000000c8, 0x00006665, 0x00000000,
+	0x00000101, 0x00040001, 0x00000000, 0x00000000,
+	0x00010000
+#else
+#error Unsupported memory initialization
+#endif
+};
+
+__weak void mxs_adjust_memory_params(uint32_t *dram_vals)
+{
+	debug("SPL: Using default SDRAM parameters\n");
+}
+
+#ifdef CONFIG_MX28
+static void initialize_dram_values(void)
+{
+	int i;
+
+	debug("SPL: Setting mx28 board specific SDRAM parameters\n");
+	mxs_adjust_memory_params(mxs_dram_vals);
+
+	debug("SPL: Applying SDRAM parameters\n");
+	for (i = 0; i < ARRAY_SIZE(mxs_dram_vals); i++)
+		writel(mxs_dram_vals[i], MXS_DRAM_BASE + (4 * i));
+}
+#else
+static void initialize_dram_values(void)
+{
+	int i;
+
+	debug("SPL: Setting mx23 board specific SDRAM parameters\n");
+	mxs_adjust_memory_params(mxs_dram_vals);
+
+	/*
+	 * HW_DRAM_CTL27, HW_DRAM_CTL28 and HW_DRAM_CTL35 are not initialized as
+	 * per FSL bootlets code.
+	 *
+	 * mx23 Reference Manual marks HW_DRAM_CTL27 and HW_DRAM_CTL28 as
+	 * "reserved".
+	 * HW_DRAM_CTL8 is setup as the last element.
+	 * So skip the initialization of these HW_DRAM_CTL registers.
+	 */
+	debug("SPL: Applying SDRAM parameters\n");
+	for (i = 0; i < ARRAY_SIZE(mxs_dram_vals); i++) {
+		if (i == 8 || i == 27 || i == 28 || i == 35)
+			continue;
+		writel(mxs_dram_vals[i], MXS_DRAM_BASE + (4 * i));
+	}
+
+	/*
+	 * Enable tRAS lockout in HW_DRAM_CTL08 ; it must be the last
+	 * element to be set
+	 */
+	writel((1 << 24), MXS_DRAM_BASE + (4 * 8));
+}
+#endif
+
+static void mxs_mem_init_clock(void)
+{
+	struct mxs_clkctrl_regs *clkctrl_regs =
+		(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
+#if defined(CONFIG_MX23)
+	/* Fractional divider for ref_emi is 33 ; 480 * 18 / 33 = 266MHz */
+	const unsigned char divider = 33;
+#elif defined(CONFIG_MX28)
+	/* Fractional divider for ref_emi is 21 ; 480 * 18 / 21 = 411MHz */
+	const unsigned char divider = 21;
+#endif
+
+	debug("SPL: Initialising FRAC0\n");
+
+	/* Gate EMI clock */
+	writeb(CLKCTRL_FRAC_CLKGATE,
+		&clkctrl_regs->hw_clkctrl_frac0_set[CLKCTRL_FRAC0_EMI]);
+
+	/* Set fractional divider for ref_emi */
+	writeb(CLKCTRL_FRAC_CLKGATE | (divider & CLKCTRL_FRAC_FRAC_MASK),
+		&clkctrl_regs->hw_clkctrl_frac0[CLKCTRL_FRAC0_EMI]);
+
+	/* Ungate EMI clock */
+	writeb(CLKCTRL_FRAC_CLKGATE,
+		&clkctrl_regs->hw_clkctrl_frac0_clr[CLKCTRL_FRAC0_EMI]);
+
+	early_delay(11000);
+
+	/* Set EMI clock divider for EMI clock to 411 / 2 = 205MHz */
+	writel((2 << CLKCTRL_EMI_DIV_EMI_OFFSET) |
+		(1 << CLKCTRL_EMI_DIV_XTAL_OFFSET),
+		&clkctrl_regs->hw_clkctrl_emi);
+
+	/* Unbypass EMI */
+	writel(CLKCTRL_CLKSEQ_BYPASS_EMI,
+		&clkctrl_regs->hw_clkctrl_clkseq_clr);
+
+	early_delay(10000);
+	debug("SPL: FRAC0 Initialised\n");
+}
+
+static void mxs_mem_setup_cpu_and_hbus(void)
+{
+	struct mxs_clkctrl_regs *clkctrl_regs =
+		(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
+
+	debug("SPL: Setting CPU and HBUS clock frequencies\n");
+
+	/* Set fractional divider for ref_cpu to 480 * 18 / 19 = 454MHz
+	 * and ungate CPU clock */
+	writeb(19 & CLKCTRL_FRAC_FRAC_MASK,
+		(uint8_t *)&clkctrl_regs->hw_clkctrl_frac0[CLKCTRL_FRAC0_CPU]);
+
+	/* Set CPU bypass */
+	writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
+		&clkctrl_regs->hw_clkctrl_clkseq_set);
+
+	/* HBUS = 151MHz */
+	writel(CLKCTRL_HBUS_DIV_MASK, &clkctrl_regs->hw_clkctrl_hbus_set);
+	writel(((~3) << CLKCTRL_HBUS_DIV_OFFSET) & CLKCTRL_HBUS_DIV_MASK,
+		&clkctrl_regs->hw_clkctrl_hbus_clr);
+
+	early_delay(10000);
+
+	/* CPU clock divider = 1 */
+	clrsetbits_le32(&clkctrl_regs->hw_clkctrl_cpu,
+			CLKCTRL_CPU_DIV_CPU_MASK, 1);
+
+	/* Disable CPU bypass */
+	writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
+		&clkctrl_regs->hw_clkctrl_clkseq_clr);
+
+	early_delay(15000);
+}
+
+static void mxs_mem_setup_vdda(void)
+{
+	struct mxs_power_regs *power_regs =
+		(struct mxs_power_regs *)MXS_POWER_BASE;
+
+	debug("SPL: Configuring VDDA\n");
+
+	writel((0xc << POWER_VDDACTRL_TRG_OFFSET) |
+		(0x7 << POWER_VDDACTRL_BO_OFFSET_OFFSET) |
+		POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW,
+		&power_regs->hw_power_vddactrl);
+}
+
+uint32_t mxs_mem_get_size(void)
+{
+	uint32_t sz, da;
+	uint32_t *vt = (uint32_t *)0x20;
+	/* The following is "subs pc, r14, #4", used as return from DABT. */
+	const uint32_t data_abort_memdetect_handler = 0xe25ef004;
+
+	/* Replace the DABT handler. */
+	da = vt[4];
+	vt[4] = data_abort_memdetect_handler;
+
+	sz = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
+
+	/* Restore the old DABT handler. */
+	vt[4] = da;
+
+	return sz;
+}
+
+#ifdef CONFIG_MX23
+static void mx23_mem_setup_vddmem(void)
+{
+	struct mxs_power_regs *power_regs =
+		(struct mxs_power_regs *)MXS_POWER_BASE;
+
+	debug("SPL: Setting mx23 VDDMEM\n");
+
+	/* We must wait before and after disabling the current limiter! */
+	early_delay(10000);
+
+	clrbits_le32(&power_regs->hw_power_vddmemctrl,
+		POWER_VDDMEMCTRL_ENABLE_ILIMIT);
+
+	early_delay(10000);
+
+}
+
+static void mx23_mem_init(void)
+{
+	debug("SPL: Initialising mx23 SDRAM Controller\n");
+
+	/*
+	 * Reset/ungate the EMI block. This is essential, otherwise the system
+	 * suffers from memory instability. This thing is mx23 specific and is
+	 * no longer present on mx28.
+	 */
+	mxs_reset_block((struct mxs_register_32 *)MXS_EMI_BASE);
+
+	mx23_mem_setup_vddmem();
+
+	/*
+	 * Configure the DRAM registers
+	 */
+
+	/* Clear START and SREFRESH bit from DRAM_CTL8 */
+	clrbits_le32(MXS_DRAM_BASE + 0x20, (1 << 16) | (1 << 8));
+
+	initialize_dram_values();
+
+	/* Set START bit in DRAM_CTL8 */
+	setbits_le32(MXS_DRAM_BASE + 0x20, 1 << 16);
+
+	clrbits_le32(MXS_DRAM_BASE + 0x40, 1 << 17);
+
+	/* Wait for EMI_STAT bit DRAM_HALTED */
+	for (;;) {
+		if (!(readl(MXS_EMI_BASE + 0x10) & (1 << 1)))
+			break;
+		early_delay(1000);
+	}
+
+	/* Adjust EMI port priority. */
+	clrsetbits_le32(0x80020000, 0x1f << 16, 0x2);
+	early_delay(20000);
+
+	setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 19);
+	setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 11);
+}
+#endif
+
+#ifdef CONFIG_MX28
+static void mx28_mem_init(void)
+{
+	struct mxs_pinctrl_regs *pinctrl_regs =
+		(struct mxs_pinctrl_regs *)MXS_PINCTRL_BASE;
+
+	debug("SPL: Initialising mx28 SDRAM Controller\n");
+
+	/* Set DDR2 mode */
+	writel(PINCTRL_EMI_DS_CTRL_DDR_MODE_DDR2,
+		&pinctrl_regs->hw_pinctrl_emi_ds_ctrl_set);
+
+	/*
+	 * Configure the DRAM registers
+	 */
+
+	/* Clear START bit from DRAM_CTL16 */
+	clrbits_le32(MXS_DRAM_BASE + 0x40, 1);
+
+	initialize_dram_values();
+
+	/* Clear SREFRESH bit from DRAM_CTL17 */
+	clrbits_le32(MXS_DRAM_BASE + 0x44, 1);
+
+	/* Set START bit in DRAM_CTL16 */
+	setbits_le32(MXS_DRAM_BASE + 0x40, 1);
+
+	/* Wait for bit 20 (DRAM init complete) in DRAM_CTL58 */
+	while (!(readl(MXS_DRAM_BASE + 0xe8) & (1 << 20)))
+		;
+}
+#endif
+
+void mxs_mem_init(void)
+{
+	early_delay(11000);
+
+	mxs_mem_init_clock();
+
+	mxs_mem_setup_vdda();
+
+#if defined(CONFIG_MX23)
+	mx23_mem_init();
+#elif defined(CONFIG_MX28)
+	mx28_mem_init();
+#endif
+
+	early_delay(10000);
+
+	mxs_mem_setup_cpu_and_hbus();
+}