X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farmv7%2Fmx6%2Fsoc.c;h=dd5aaa286a68d708fda6814e6d107adba4d70231;hp=193ba1240fb3e04b37e21aacf927c7ffd1900fad;hb=0ce4af99c07acebf4fce9a91f1099d2460629293;hpb=b27673ccbd3d5435319b5c09c3e7061f559f925d diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c index 193ba1240f..dd5aaa286a 100644 --- a/arch/arm/cpu/armv7/mx6/soc.c +++ b/arch/arm/cpu/armv7/mx6/soc.c @@ -4,33 +4,30 @@ * * (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 +#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; @@ -40,6 +37,12 @@ struct scu_regs { u32 fpga_rev; }; +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; @@ -48,25 +51,51 @@ u32 get_cpu_rev(void) 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) { - struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR; - u32 cfg = readl(&scu->config) & 3; - 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; +#ifdef CONFIG_MX6SX + struct aipstz_regs *aips3; +#endif aips1 = (struct aipstz_regs *)AIPS1_BASE_ADDR; aips2 = (struct aipstz_regs *)AIPS2_BASE_ADDR; +#ifdef CONFIG_MX6SX + aips3 = (struct aipstz_regs *)AIPS3_BASE_ADDR; +#endif /* * Set all MPROTx to be non-bufferable, trusted for R/W, @@ -92,20 +121,54 @@ void init_aips(void) writel(0x00000000, &aips2->opacr2); writel(0x00000000, &aips2->opacr3); writel(0x00000000, &aips2->opacr4); + +#ifdef CONFIG_MX6SX + /* + * Set all MPROTx to be non-bufferable, trusted for R/W, + * not forced to user-mode. + */ + writel(0x77777777, &aips3->mprot0); + writel(0x77777777, &aips3->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, &aips3->opacr0); + writel(0x00000000, &aips3->opacr1); + writel(0x00000000, &aips3->opacr2); + writel(0x00000000, &aips3->opacr3); + writel(0x00000000, &aips3->opacr4); +#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 VDDSOC + * Set the PMU_REG_CORE register * - * Mask out the REG_CORE[22:18] bits (REG2_TRIG) and set - * them to the specified millivolt level. + * 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). */ -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 */ @@ -114,12 +177,37 @@ void set_vddsoc(u32 mv) 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) @@ -132,29 +220,88 @@ static void imx_set_wdog_powerdown(bool enable) 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(); - set_vddsoc(1200); /* Set VDDSOC to 1.2V */ + /* 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) { +#if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH) + enum dcache_option option = DCACHE_WRITETHROUGH; +#else + enum dcache_option option = DCACHE_WRITEBACK; +#endif + + /* Avoid random hang when download by usb */ + invalidate_dcache_all(); + /* Enable D-cache. I-cache is already enabled in start.S */ dcache_enable(); + + /* Enable caching on OCRAM and ROM */ + mmu_set_region_dcache_behaviour(ROMCP_ARB_BASE_ADDR, + ROMCP_ARB_END_ADDR, + option); + mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR, + IRAM_SIZE, + option); } #endif #if defined(CONFIG_FEC_MXC) void imx_get_mac_from_fuse(int dev_id, unsigned char *mac) { - struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE; - struct fuse_bank *bank = &iim->bank[4]; + 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; @@ -194,10 +341,10 @@ const struct boot_mode soc_boot_modes[] = { /* 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)}, + {"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)}, @@ -208,4 +355,144 @@ const struct boot_mode soc_boot_modes[] = { 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_cpu_type(MXC_CPU_MX6SX)) + 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; + + /* 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 + + /* Must disable the L2 before changing the latency parameters */ + clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); + + 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 */