1 files changed, 435 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/cpu/armv7/mx6/soc.c b/roms/u-boot/arch/arm/cpu/armv7/mx6/soc.c
new file mode 100644
index 00000000..17252798
--- /dev/null
+++ b/roms/u-boot/arch/arm/cpu/armv7/mx6/soc.c
@@ -0,0 +1,435 @@
+/*
+ * (C) Copyright 2007
+ * Sascha Hauer, Pengutronix
+ *
+ * (C) Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/armv7.h>
+#include <asm/pl310.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/imx-common/boot_mode.h>
+#include <asm/imx-common/dma.h>
+#include <stdbool.h>
+#include <asm/arch/mxc_hdmi.h>
+#include <asm/arch/crm_regs.h>
+
+enum ldo_reg {
+	LDO_ARM,
+	LDO_SOC,
+	LDO_PU,
+};
+
+struct scu_regs {
+	u32	ctrl;
+	u32	config;
+	u32	status;
+	u32	invalidate;
+	u32	fpga_rev;
+};
+
+u32 get_cpu_rev(void)
+{
+	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
+	u32 reg = readl(&anatop->digprog_sololite);
+	u32 type = ((reg >> 16) & 0xff);
+
+	if (type != MXC_CPU_MX6SL) {
+		reg = readl(&anatop->digprog);
+		struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR;
+		u32 cfg = readl(&scu->config) & 3;
+		type = ((reg >> 16) & 0xff);
+		if (type == MXC_CPU_MX6DL) {
+			if (!cfg)
+				type = MXC_CPU_MX6SOLO;
+		}
+
+		if (type == MXC_CPU_MX6Q) {
+			if (cfg == 1)
+				type = MXC_CPU_MX6D;
+		}
+
+	}
+	reg &= 0xff;		/* mx6 silicon revision */
+	return (type << 12) | (reg + 0x10);
+}
+
+#ifdef CONFIG_REVISION_TAG
+u32 __weak get_board_rev(void)
+{
+	u32 cpurev = get_cpu_rev();
+	u32 type = ((cpurev >> 12) & 0xff);
+	if (type == MXC_CPU_MX6SOLO)
+		cpurev = (MXC_CPU_MX6DL) << 12 | (cpurev & 0xFFF);
+
+	if (type == MXC_CPU_MX6D)
+		cpurev = (MXC_CPU_MX6Q) << 12 | (cpurev & 0xFFF);
+
+	return cpurev;
+}
+#endif
+
+void init_aips(void)
+{
+	struct aipstz_regs *aips1, *aips2;
+
+	aips1 = (struct aipstz_regs *)AIPS1_BASE_ADDR;
+	aips2 = (struct aipstz_regs *)AIPS2_BASE_ADDR;
+
+	/*
+	 * Set all MPROTx to be non-bufferable, trusted for R/W,
+	 * not forced to user-mode.
+	 */
+	writel(0x77777777, &aips1->mprot0);
+	writel(0x77777777, &aips1->mprot1);
+	writel(0x77777777, &aips2->mprot0);
+	writel(0x77777777, &aips2->mprot1);
+
+	/*
+	 * Set all OPACRx to be non-bufferable, not require
+	 * supervisor privilege level for access,allow for
+	 * write access and untrusted master access.
+	 */
+	writel(0x00000000, &aips1->opacr0);
+	writel(0x00000000, &aips1->opacr1);
+	writel(0x00000000, &aips1->opacr2);
+	writel(0x00000000, &aips1->opacr3);
+	writel(0x00000000, &aips1->opacr4);
+	writel(0x00000000, &aips2->opacr0);
+	writel(0x00000000, &aips2->opacr1);
+	writel(0x00000000, &aips2->opacr2);
+	writel(0x00000000, &aips2->opacr3);
+	writel(0x00000000, &aips2->opacr4);
+}
+
+static void clear_ldo_ramp(void)
+{
+	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
+	int reg;
+
+	/* ROM may modify LDO ramp up time according to fuse setting, so in
+	 * order to be in the safe side we neeed to reset these settings to
+	 * match the reset value: 0'b00
+	 */
+	reg = readl(&anatop->ana_misc2);
+	reg &= ~(0x3f << 24);
+	writel(reg, &anatop->ana_misc2);
+}
+
+/*
+ * Set the VDDSOC
+ *
+ * Mask out the REG_CORE[22:18] bits (REG2_TRIG) and set
+ * them to the specified millivolt level.
+ * Possible values are from 0.725V to 1.450V in steps of
+ * 0.025V (25mV).
+ */
+static int set_ldo_voltage(enum ldo_reg ldo, u32 mv)
+{
+	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
+	u32 val, step, old, reg = readl(&anatop->reg_core);
+	u8 shift;
+
+	if (mv < 725)
+		val = 0x00;	/* Power gated off */
+	else if (mv > 1450)
+		val = 0x1F;	/* Power FET switched full on. No regulation */
+	else
+		val = (mv - 700) / 25;
+
+	clear_ldo_ramp();
+
+	switch (ldo) {
+	case LDO_SOC:
+		shift = 18;
+		break;
+	case LDO_PU:
+		shift = 9;
+		break;
+	case LDO_ARM:
+		shift = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	old = (reg & (0x1F << shift)) >> shift;
+	step = abs(val - old);
+	if (step == 0)
+		return 0;
+
+	reg = (reg & ~(0x1F << shift)) | (val << shift);
+	writel(reg, &anatop->reg_core);
+
+	/*
+	 * The LDO ramp-up is based on 64 clock cycles of 24 MHz = 2.6 us per
+	 * step
+	 */
+	udelay(3 * step);
+
+	return 0;
+}
+
+static void imx_set_wdog_powerdown(bool enable)
+{
+	struct wdog_regs *wdog1 = (struct wdog_regs *)WDOG1_BASE_ADDR;
+	struct wdog_regs *wdog2 = (struct wdog_regs *)WDOG2_BASE_ADDR;
+
+	/* Write to the PDE (Power Down Enable) bit */
+	writew(enable, &wdog1->wmcr);
+	writew(enable, &wdog2->wmcr);
+}
+
+static void set_ahb_rate(u32 val)
+{
+	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+	u32 reg, div;
+
+	div = get_periph_clk() / val - 1;
+	reg = readl(&mxc_ccm->cbcdr);
+
+	writel((reg & (~MXC_CCM_CBCDR_AHB_PODF_MASK)) |
+		(div << MXC_CCM_CBCDR_AHB_PODF_OFFSET), &mxc_ccm->cbcdr);
+}
+
+static void clear_mmdc_ch_mask(void)
+{
+	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	/* Clear MMDC channel mask */
+	writel(0, &mxc_ccm->ccdr);
+}
+
+int arch_cpu_init(void)
+{
+	init_aips();
+
+	/* Need to clear MMDC_CHx_MASK to make warm reset work. */
+	clear_mmdc_ch_mask();
+
+	/*
+	 * When low freq boot is enabled, ROM will not set AHB
+	 * freq, so we need to ensure AHB freq is 132MHz in such
+	 * scenario.
+	 */
+	if (mxc_get_clock(MXC_ARM_CLK) == 396000000)
+		set_ahb_rate(132000000);
+
+	imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */
+
+#ifdef CONFIG_APBH_DMA
+	/* Start APBH DMA */
+	mxs_dma_init();
+#endif
+
+	return 0;
+}
+
+int board_postclk_init(void)
+{
+	set_ldo_voltage(LDO_SOC, 1175);	/* Set VDDSOC to 1.175V */
+
+	return 0;
+}
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+void enable_caches(void)
+{
+	/* Avoid random hang when download by usb */
+	invalidate_dcache_all();
+	/* Enable D-cache. I-cache is already enabled in start.S */
+	dcache_enable();
+}
+#endif
+
+#if defined(CONFIG_FEC_MXC)
+void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
+{
+	struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
+	struct fuse_bank *bank = &ocotp->bank[4];
+	struct fuse_bank4_regs *fuse =
+			(struct fuse_bank4_regs *)bank->fuse_regs;
+
+	u32 value = readl(&fuse->mac_addr_high);
+	mac[0] = (value >> 8);
+	mac[1] = value ;
+
+	value = readl(&fuse->mac_addr_low);
+	mac[2] = value >> 24 ;
+	mac[3] = value >> 16 ;
+	mac[4] = value >> 8 ;
+	mac[5] = value ;
+
+}
+#endif
+
+void boot_mode_apply(unsigned cfg_val)
+{
+	unsigned reg;
+	struct src *psrc = (struct src *)SRC_BASE_ADDR;
+	writel(cfg_val, &psrc->gpr9);
+	reg = readl(&psrc->gpr10);
+	if (cfg_val)
+		reg |= 1 << 28;
+	else
+		reg &= ~(1 << 28);
+	writel(reg, &psrc->gpr10);
+}
+/*
+ * cfg_val will be used for
+ * Boot_cfg4[7:0]:Boot_cfg3[7:0]:Boot_cfg2[7:0]:Boot_cfg1[7:0]
+ * After reset, if GPR10[28] is 1, ROM will copy GPR9[25:0]
+ * to SBMR1, which will determine the boot device.
+ */
+const struct boot_mode soc_boot_modes[] = {
+	{"normal",	MAKE_CFGVAL(0x00, 0x00, 0x00, 0x00)},
+	/* reserved value should start rom usb */
+	{"usb",		MAKE_CFGVAL(0x01, 0x00, 0x00, 0x00)},
+	{"sata",	MAKE_CFGVAL(0x20, 0x00, 0x00, 0x00)},
+	{"escpi1:0",	MAKE_CFGVAL(0x30, 0x00, 0x00, 0x08)},
+	{"escpi1:1",	MAKE_CFGVAL(0x30, 0x00, 0x00, 0x18)},
+	{"escpi1:2",	MAKE_CFGVAL(0x30, 0x00, 0x00, 0x28)},
+	{"escpi1:3",	MAKE_CFGVAL(0x30, 0x00, 0x00, 0x38)},
+	/* 4 bit bus width */
+	{"esdhc1",	MAKE_CFGVAL(0x40, 0x20, 0x00, 0x00)},
+	{"esdhc2",	MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
+	{"esdhc3",	MAKE_CFGVAL(0x40, 0x30, 0x00, 0x00)},
+	{"esdhc4",	MAKE_CFGVAL(0x40, 0x38, 0x00, 0x00)},
+	{NULL,		0},
+};
+
+void s_init(void)
+{
+	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
+	int is_6q = is_cpu_type(MXC_CPU_MX6Q);
+	u32 mask480;
+	u32 mask528;
+
+	/* Due to hardware limitation, on MX6Q we need to gate/ungate all PFDs
+	 * to make sure PFD is working right, otherwise, PFDs may
+	 * not output clock after reset, MX6DL and MX6SL have added 396M pfd
+	 * workaround in ROM code, as bus clock need it
+	 */
+
+	mask480 = ANATOP_PFD_CLKGATE_MASK(0) |
+		ANATOP_PFD_CLKGATE_MASK(1) |
+		ANATOP_PFD_CLKGATE_MASK(2) |
+		ANATOP_PFD_CLKGATE_MASK(3);
+	mask528 = ANATOP_PFD_CLKGATE_MASK(0) |
+		ANATOP_PFD_CLKGATE_MASK(1) |
+		ANATOP_PFD_CLKGATE_MASK(3);
+
+	/*
+	 * Don't reset PFD2 on DL/S
+	 */
+	if (is_6q)
+		mask528 |= ANATOP_PFD_CLKGATE_MASK(2);
+	writel(mask480, &anatop->pfd_480_set);
+	writel(mask528, &anatop->pfd_528_set);
+	writel(mask480, &anatop->pfd_480_clr);
+	writel(mask528, &anatop->pfd_528_clr);
+}
+
+#ifdef CONFIG_IMX_HDMI
+void imx_enable_hdmi_phy(void)
+{
+	struct hdmi_regs *hdmi = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
+	u8 reg;
+	reg = readb(&hdmi->phy_conf0);
+	reg |= HDMI_PHY_CONF0_PDZ_MASK;
+	writeb(reg, &hdmi->phy_conf0);
+	udelay(3000);
+	reg |= HDMI_PHY_CONF0_ENTMDS_MASK;
+	writeb(reg, &hdmi->phy_conf0);
+	udelay(3000);
+	reg |= HDMI_PHY_CONF0_GEN2_TXPWRON_MASK;
+	writeb(reg, &hdmi->phy_conf0);
+	writeb(HDMI_MC_PHYRSTZ_ASSERT, &hdmi->mc_phyrstz);
+}
+
+void imx_setup_hdmi(void)
+{
+	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+	struct hdmi_regs *hdmi  = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
+	int reg;
+
+	/* Turn on HDMI PHY clock */
+	reg = readl(&mxc_ccm->CCGR2);
+	reg |=  MXC_CCM_CCGR2_HDMI_TX_IAHBCLK_MASK|
+		 MXC_CCM_CCGR2_HDMI_TX_ISFRCLK_MASK;
+	writel(reg, &mxc_ccm->CCGR2);
+	writeb(HDMI_MC_PHYRSTZ_DEASSERT, &hdmi->mc_phyrstz);
+	reg = readl(&mxc_ccm->chsccdr);
+	reg &= ~(MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_MASK|
+		 MXC_CCM_CHSCCDR_IPU1_DI0_PODF_MASK|
+		 MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_MASK);
+	reg |= (CHSCCDR_PODF_DIVIDE_BY_3
+		 << MXC_CCM_CHSCCDR_IPU1_DI0_PODF_OFFSET)
+		 |(CHSCCDR_IPU_PRE_CLK_540M_PFD
+		 << MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_OFFSET);
+	writel(reg, &mxc_ccm->chsccdr);
+}
+#endif
+
+#ifndef CONFIG_SYS_L2CACHE_OFF
+#define IOMUXC_GPR11_L2CACHE_AS_OCRAM 0x00000002
+void v7_outer_cache_enable(void)
+{
+	struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
+	unsigned int val;
+
+#if defined CONFIG_MX6SL
+	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
+	val = readl(&iomux->gpr[11]);
+	if (val & IOMUXC_GPR11_L2CACHE_AS_OCRAM) {
+		/* L2 cache configured as OCRAM, reset it */
+		val &= ~IOMUXC_GPR11_L2CACHE_AS_OCRAM;
+		writel(val, &iomux->gpr[11]);
+	}
+#endif
+
+	writel(0x132, &pl310->pl310_tag_latency_ctrl);
+	writel(0x132, &pl310->pl310_data_latency_ctrl);
+
+	val = readl(&pl310->pl310_prefetch_ctrl);
+
+	/* Turn on the L2 I/D prefetch */
+	val |= 0x30000000;
+
+	/*
+	 * The L2 cache controller(PL310) version on the i.MX6D/Q is r3p1-50rel0
+	 * The L2 cache controller(PL310) version on the i.MX6DL/SOLO/SL is r3p2
+	 * But according to ARM PL310 errata: 752271
+	 * ID: 752271: Double linefill feature can cause data corruption
+	 * Fault Status: Present in: r3p0, r3p1, r3p1-50rel0. Fixed in r3p2
+	 * Workaround: The only workaround to this erratum is to disable the
+	 * double linefill feature. This is the default behavior.
+	 */
+
+#ifndef CONFIG_MX6Q
+	val |= 0x40800000;
+#endif
+	writel(val, &pl310->pl310_prefetch_ctrl);
+
+	val = readl(&pl310->pl310_power_ctrl);
+	val |= L2X0_DYNAMIC_CLK_GATING_EN;
+	val |= L2X0_STNDBY_MODE_EN;
+	writel(val, &pl310->pl310_power_ctrl);
+
+	setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+}
+
+void v7_outer_cache_disable(void)
+{
+	struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
+
+	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+}
+#endif /* !CONFIG_SYS_L2CACHE_OFF */