*
* (C) Copyright 2009 Freescale Semiconductor, Inc.
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.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>
+
+#define VDDPU_MASK (0x1f << 9)
+
+enum ldo_reg {
+ LDO_ARM,
+ LDO_SOC,
+ LDO_PU,
+};
struct scu_regs {
u32 ctrl;
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
*
* Possible values are from 0.725V to 1.450V in steps of
* 0.025V (25mV).
*/
-void set_vddsoc(u32 mv)
+static int set_ldo_voltage(enum ldo_reg ldo, u32 mv)
{
struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
- u32 val, reg = readl(&anatop->reg_core);
+ u32 val, step, old, reg = readl(&anatop->reg_core);
+ u8 shift;
if (mv < 725)
val = 0x00; /* Power gated off */
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);
+
/*
- * Mask out the REG_CORE[22:18] bits (REG2_TRIG)
- * and set them to the calculated value (0.7V + val * 0.25V)
+ * The LDO ramp-up is based on 64 clock cycles of 24 MHz = 2.6 us per
+ * step
*/
- reg = (reg & ~(0x1F << 18)) | (val << 18);
- writel(reg, &anatop->reg_core);
+ udelay(3 * step);
+
+ return 0;
}
static void imx_set_wdog_powerdown(bool enable)
writew(enable, &wdog2->wmcr);
}
+static void imx_set_vddpu_power_down(void)
+{
+ struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
+ struct gpc_regs *gpc = (struct gpc_regs *)GPC_BASE_ADDR;
+
+ u32 reg;
+
+ /*
+ * Disable the brown out detection since we are going to be
+ * disabling the LDO.
+ */
+ reg = readl(&anatop->ana_misc2);
+ reg &= ~ANADIG_ANA_MISC2_REG1_BO_EN;
+ writel(reg, &anatop->ana_misc2);
+
+ /* need to power down xPU in GPC before turning off PU LDO */
+ reg = readl(&gpc->gpu_ctrl);
+ writel(reg | 0x1, &gpc->gpu_ctrl);
+
+ reg = readl(&gpc->ctrl);
+ writel(reg | 0x1, &gpc->ctrl);
+ while (readl(&gpc->ctrl) & 0x1)
+ ;
+
+ /* Mask the ANATOP brown out interrupt in the GPC. */
+ reg = readl(&gpc->imr4);
+ reg |= 0x80000000;
+ writel(reg, &gpc->imr4);
+
+ /* disable VDDPU */
+ writel(VDDPU_MASK, &anatop->reg_core_clr);
+
+ /* Clear the BO interrupt in the ANATOP. */
+ reg = readl(&anatop->ana_misc1);
+ reg |= 0x80000000;
+ writel(reg, &anatop->ana_misc1);
+}
+
int arch_cpu_init(void)
{
init_aips();
- set_vddsoc(1200); /* Set VDDSOC to 1.2V */
-
imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */
+ imx_set_vddpu_power_down();
#ifdef CONFIG_APBH_DMA
/* Start APBH DMA */
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();
}
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
projects / karo-tx-uboot.git / blobdiff