/* * (C) Copyright 2007 * Sascha Hauer, Pengutronix * * (C) Copyright 2009 Freescale Semiconductor, Inc. * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include enum ldo_reg { LDO_ARM, LDO_SOC, LDO_PU, }; struct scu_regs { u32 ctrl; u32 config; u32 status; u32 invalidate; u32 fpga_rev; }; #if defined(CONFIG_IMX_THERMAL) static const struct imx_thermal_plat imx6_thermal_plat = { .regs = (void *)ANATOP_BASE_ADDR, .fuse_bank = 1, .fuse_word = 6, }; U_BOOT_DEVICE(imx6_thermal) = { .name = "imx_thermal", .platdata = &imx6_thermal_plat, }; #endif #if defined(CONFIG_SECURE_BOOT) struct imx_sec_config_fuse_t const imx_sec_config_fuse = { .bank = 0, .word = 6, }; #endif u32 get_nr_cpus(void) { struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR; return readl(&scu->config) & 3; } 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); u32 major, cfg = 0; if (type != MXC_CPU_MX6SL) { reg = readl(&anatop->digprog); struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR; 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; } } major = ((reg >> 8) & 0xff); if ((major >= 1) && ((type == MXC_CPU_MX6Q) || (type == MXC_CPU_MX6D))) { major--; type = MXC_CPU_MX6QP; if (cfg == 1) type = MXC_CPU_MX6DP; } reg &= 0xff; /* mx6 silicon revision */ return (type << 12) | (reg + (0x10 * (major + 1))); } /* * OCOTP_CFG3[17:16] (see Fusemap Description Table offset 0x440) * defines a 2-bit SPEED_GRADING */ #define OCOTP_CFG3_SPEED_SHIFT 16 #define OCOTP_CFG3_SPEED_800MHZ 0 #define OCOTP_CFG3_SPEED_850MHZ 1 #define OCOTP_CFG3_SPEED_1GHZ 2 #define OCOTP_CFG3_SPEED_1P2GHZ 3 /* * For i.MX6UL */ #define OCOTP_CFG3_SPEED_528MHZ 1 #define OCOTP_CFG3_SPEED_696MHZ 2 u32 get_cpu_speed_grade_hz(void) { struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; struct fuse_bank *bank = &ocotp->bank[0]; struct fuse_bank0_regs *fuse = (struct fuse_bank0_regs *)bank->fuse_regs; uint32_t val; val = readl(&fuse->cfg3); val >>= OCOTP_CFG3_SPEED_SHIFT; val &= 0x3; if (is_mx6ul() || is_mx6ull()) { if (val == OCOTP_CFG3_SPEED_528MHZ) return 528000000; else if (val == OCOTP_CFG3_SPEED_696MHZ) return 69600000; else return 0; } switch (val) { /* Valid for IMX6DQ */ case OCOTP_CFG3_SPEED_1P2GHZ: if (is_mx6dq() || is_mx6dqp()) return 1200000000; /* Valid for IMX6SX/IMX6SDL/IMX6DQ */ case OCOTP_CFG3_SPEED_1GHZ: return 996000000; /* Valid for IMX6DQ */ case OCOTP_CFG3_SPEED_850MHZ: if (is_mx6dq() || is_mx6dqp()) return 852000000; /* Valid for IMX6SX/IMX6SDL/IMX6DQ */ case OCOTP_CFG3_SPEED_800MHZ: return 792000000; } return 0; } /* * OCOTP_MEM0[7:6] (see Fusemap Description Table offset 0x480) * defines a 2-bit Temperature Grade * * return temperature grade and min/max temperature in celcius */ #define OCOTP_MEM0_TEMP_SHIFT 6 u32 get_cpu_temp_grade(int *minc, int *maxc) { struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; struct fuse_bank *bank = &ocotp->bank[1]; struct fuse_bank1_regs *fuse = (struct fuse_bank1_regs *)bank->fuse_regs; uint32_t val; val = readl(&fuse->mem0); val >>= OCOTP_MEM0_TEMP_SHIFT; val &= 0x3; if (minc && maxc) { if (val == TEMP_AUTOMOTIVE) { *minc = -40; *maxc = 125; } else if (val == TEMP_INDUSTRIAL) { *minc = -40; *maxc = 105; } else if (val == TEMP_EXTCOMMERCIAL) { *minc = -20; *maxc = 105; } else { *minc = 0; *maxc = 95; } } return val; } #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 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 PMU_REG_CORE register * * Set LDO_SOC/PU/ARM regulators 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 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; u32 reg; reg = readl(&mxc_ccm->ccdr); /* Clear MMDC channel mask */ if (is_mx6sx() || is_mx6ul() || is_mx6ull() || is_mx6sl()) reg &= ~(MXC_CCM_CCDR_MMDC_CH1_HS_MASK); else reg &= ~(MXC_CCM_CCDR_MMDC_CH1_HS_MASK | MXC_CCM_CCDR_MMDC_CH0_HS_MASK); writel(reg, &mxc_ccm->ccdr); } static void init_bandgap(void) { struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR; /* * Ensure the bandgap has stabilized. */ while (!(readl(&anatop->ana_misc0) & 0x80)) ; /* * For best noise performance of the analog blocks using the * outputs of the bandgap, the reftop_selfbiasoff bit should * be set. */ writel(BM_ANADIG_ANA_MISC0_REFTOP_SELBIASOFF, &anatop->ana_misc0_set); /* * On i.MX6ULL, the LDO 1.2V bandgap voltage is 30mV higher. so set * VBGADJ bits to 2b'110 to adjust it. */ if (is_mx6ull()) writel(BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ, &anatop->ana_misc0_set); } #ifdef CONFIG_MX6SL static void set_preclk_from_osc(void) { struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR; u32 reg; reg = readl(&mxc_ccm->cscmr1); reg |= MXC_CCM_CSCMR1_PER_CLK_SEL_MASK; writel(reg, &mxc_ccm->cscmr1); } #endif int arch_cpu_init(void) { init_aips(); /* Need to clear MMDC_CHx_MASK to make warm reset work. */ clear_mmdc_ch_mask(); /* * Disable self-bias circuit in the analog bandap. * The self-bias circuit is used by the bandgap during startup. * This bit should be set after the bandgap has initialized. */ init_bandgap(); if (!is_mx6ul() && !is_mx6ull()) { /* * When low freq boot is enabled, ROM will not set AHB * freq, so we need to ensure AHB freq is 132MHz in such * scenario. * * To i.MX6UL, when power up, default ARM core and * AHB rate is 396M and 132M. */ if (mxc_get_clock(MXC_ARM_CLK) == 396000000) set_ahb_rate(132000000); } if (is_mx6ul()) { if (is_soc_rev(CHIP_REV_1_0) == 0) { /* * According to the design team's requirement on * i.MX6UL,the PMIC_STBY_REQ PAD should be configured * as open drain 100K (0x0000b8a0). * Only exists on TO1.0 */ writel(0x0000b8a0, IOMUXC_BASE_ADDR + 0x29c); } else { /* * From TO1.1, SNVS adds internal pull up control * for POR_B, the register filed is GPBIT[1:0], * after system boot up, it can be set to 2b'01 * to disable internal pull up.It can save about * 30uA power in SNVS mode. */ writel((readl(MX6UL_SNVS_LP_BASE_ADDR + 0x10) & (~0x1400)) | 0x400, MX6UL_SNVS_LP_BASE_ADDR + 0x10); } } if (is_mx6ull()) { /* * GPBIT[1:0] is suggested to set to 2'b11: * 2'b00 : always PUP100K * 2'b01 : PUP100K when PMIC_ON_REQ or SOC_NOT_FAIL * 2'b10 : always disable PUP100K * 2'b11 : PDN100K when SOC_FAIL, PUP100K when SOC_NOT_FAIL * register offset is different from i.MX6UL, since * i.MX6UL is fixed by ECO. */ writel(readl(MX6UL_SNVS_LP_BASE_ADDR) | 0x3, MX6UL_SNVS_LP_BASE_ADDR); } /* Set perclk to source from OSC 24MHz */ #if defined(CONFIG_MX6SL) set_preclk_from_osc(); #endif imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */ #ifdef CONFIG_APBH_DMA /* Start APBH DMA */ mxs_dma_init(); #endif init_src(); return 0; } #ifdef CONFIG_ENV_IS_IN_MMC __weak int board_mmc_get_env_dev(int devno) { return CONFIG_SYS_MMC_ENV_DEV; } static int mmc_get_boot_dev(void) { struct src *src_regs = (struct src *)SRC_BASE_ADDR; u32 soc_sbmr = readl(&src_regs->sbmr1); u32 bootsel; int devno; /* * Refer to * "i.MX 6Dual/6Quad Applications Processor Reference Manual" * Chapter "8.5.3.1 Expansion Device eFUSE Configuration" * i.MX6SL/SX/UL has same layout. */ bootsel = (soc_sbmr & 0x000000FF) >> 6; /* No boot from sd/mmc */ if (bootsel != 1) return -1; /* BOOT_CFG2[3] and BOOT_CFG2[4] */ devno = (soc_sbmr & 0x00001800) >> 11; return devno; } int mmc_get_env_dev(void) { int devno = mmc_get_boot_dev(); /* If not boot from sd/mmc, use default value */ if (devno < 0) return CONFIG_SYS_MMC_ENV_DEV; return board_mmc_get_env_dev(devno); } #ifdef CONFIG_SYS_MMC_ENV_PART __weak int board_mmc_get_env_part(int devno) { return CONFIG_SYS_MMC_ENV_PART; } uint mmc_get_env_part(struct mmc *mmc) { int devno = mmc_get_boot_dev(); /* If not boot from sd/mmc, use default value */ if (devno < 0) return CONFIG_SYS_MMC_ENV_PART; return board_mmc_get_env_part(devno); } #endif #endif int board_postclk_init(void) { set_ldo_voltage(LDO_SOC, 1175); /* Set VDDSOC to 1.175V */ return 0; } #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; if ((is_mx6sx() || is_mx6ul() || is_mx6ull()) && dev_id == 1) { u32 value = readl(&fuse->mac_addr2); mac[0] = value >> 24 ; mac[1] = value >> 16 ; mac[2] = value >> 8 ; mac[3] = value ; value = readl(&fuse->mac_addr1); mac[4] = value >> 24 ; mac[5] = value >> 16 ; } else { u32 value = readl(&fuse->mac_addr1); mac[0] = (value >> 8); mac[1] = value ; value = readl(&fuse->mac_addr0); mac[2] = value >> 24 ; mac[3] = value >> 16 ; mac[4] = value >> 8 ; mac[5] = value ; } } #endif /* * 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 use GPR9[25:0] * instead of SBMR1 to 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(0x10, 0x00, 0x00, 0x00)}, {"sata", MAKE_CFGVAL(0x20, 0x00, 0x00, 0x00)}, {"ecspi1:0", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x08)}, {"ecspi1:1", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x18)}, {"ecspi1:2", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x28)}, {"ecspi1:3", 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 reset_misc(void) { #ifdef CONFIG_VIDEO_MXS lcdif_power_down(); #endif } void s_init(void) { struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR; struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR; u32 mask480; u32 mask528; u32 reg, periph1, periph2; if (is_mx6sx() || is_mx6ul() || is_mx6ull()) return; /* 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(1) | ANATOP_PFD_CLKGATE_MASK(3); reg = readl(&ccm->cbcmr); periph2 = ((reg & MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_MASK) >> MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_OFFSET); periph1 = ((reg & MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_MASK) >> MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_OFFSET); /* Checking if PLL2 PFD0 or PLL2 PFD2 is using for periph clock */ if ((periph2 != 0x2) && (periph1 != 0x2)) mask528 |= ANATOP_PFD_CLKGATE_MASK(0); if ((periph2 != 0x1) && (periph1 != 0x1) && (periph2 != 0x3) && (periph1 != 0x3)) 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, count; u8 val; /* 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); /* Clear the overflow condition */ if (readb(&hdmi->ih_fc_stat2) & HDMI_IH_FC_STAT2_OVERFLOW_MASK) { /* TMDS software reset */ writeb((u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, &hdmi->mc_swrstz); val = readb(&hdmi->fc_invidconf); /* Need minimum 3 times to write to clear the register */ for (count = 0 ; count < 5 ; count++) writeb(val, &hdmi->fc_invidconf); } } #endif #ifdef CONFIG_IMX_BOOTAUX int arch_auxiliary_core_up(u32 core_id, u32 boot_private_data) { struct src *src_reg; u32 stack, pc; if (!boot_private_data) return -EINVAL; stack = *(u32 *)boot_private_data; pc = *(u32 *)(boot_private_data + 4); /* Set the stack and pc to M4 bootROM */ writel(stack, M4_BOOTROM_BASE_ADDR); writel(pc, M4_BOOTROM_BASE_ADDR + 4); /* Enable M4 */ src_reg = (struct src *)SRC_BASE_ADDR; clrsetbits_le32(&src_reg->scr, SRC_SCR_M4C_NON_SCLR_RST_MASK, SRC_SCR_M4_ENABLE_MASK); return 0; } int arch_auxiliary_core_check_up(u32 core_id) { struct src *src_reg = (struct src *)SRC_BASE_ADDR; unsigned val; val = readl(&src_reg->scr); if (val & SRC_SCR_M4C_NON_SCLR_RST_MASK) return 0; /* assert in reset */ return 1; } #endif