Add SoC level initialization code - arch_cpu_init - mmu table - detect cpu revision - reset cpu and wdog settings - M4 boot - timer init - wdog settings - lowlevel init to save/restore registers - a few dummy header file to avoid build failure - ft_system_setup and ft_add_optee_node - mmc env related
Signed-off-by: Peng Fan peng.fan@nxp.com --- arch/arm/include/asm/arch-mx8m/crm_regs.h | 10 + arch/arm/include/asm/arch-mx8m/gpio.h | 12 + arch/arm/include/asm/arch-mx8m/sys_proto.h | 18 + arch/arm/mach-imx/Makefile | 1 + arch/arm/mach-imx/mx8m/Makefile | 3 +- arch/arm/mach-imx/mx8m/lowlevel_init.S | 63 ++++ arch/arm/mach-imx/mx8m/soc.c | 539 +++++++++++++++++++++++++++++ 7 files changed, 645 insertions(+), 1 deletion(-) create mode 100644 arch/arm/include/asm/arch-mx8m/crm_regs.h create mode 100644 arch/arm/include/asm/arch-mx8m/gpio.h create mode 100644 arch/arm/include/asm/arch-mx8m/sys_proto.h create mode 100644 arch/arm/mach-imx/mx8m/lowlevel_init.S create mode 100644 arch/arm/mach-imx/mx8m/soc.c
diff --git a/arch/arm/include/asm/arch-mx8m/crm_regs.h b/arch/arm/include/asm/arch-mx8m/crm_regs.h new file mode 100644 index 0000000000..6582318983 --- /dev/null +++ b/arch/arm/include/asm/arch-mx8m/crm_regs.h @@ -0,0 +1,10 @@ +/* + * Copyright 2017 NXP + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _ASM_ARCH_MX8M_CRM_REGS_H +#define _ASM_ARCH_MX8M_CRM_REGS_H +/* Dummy header, some imx-common code needs this file */ +#endif diff --git a/arch/arm/include/asm/arch-mx8m/gpio.h b/arch/arm/include/asm/arch-mx8m/gpio.h new file mode 100644 index 0000000000..b666d37700 --- /dev/null +++ b/arch/arm/include/asm/arch-mx8m/gpio.h @@ -0,0 +1,12 @@ +/* + * Copyright 2017 NXP + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ASM_ARCH_MX8M_GPIO_H +#define __ASM_ARCH_MX8M_GPIO_H + +#include <asm/mach-imx/gpio.h> + +#endif diff --git a/arch/arm/include/asm/arch-mx8m/sys_proto.h b/arch/arm/include/asm/arch-mx8m/sys_proto.h new file mode 100644 index 0000000000..8bf9ac6697 --- /dev/null +++ b/arch/arm/include/asm/arch-mx8m/sys_proto.h @@ -0,0 +1,18 @@ +/* + * Copyright (C) 2017 NXP + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ARCH_MX8M_SYS_PROTO_H +#define __ARCH_MX8M_SYS_PROTO_H + +#include <asm/mach-imx/sys_proto.h> + +void set_wdog_reset(struct wdog_regs *wdog); +void enable_tzc380(void); +void restore_boot_params(void); +extern unsigned long rom_pointer[]; +enum boot_device get_boot_device(void); +bool is_usb_boot(void); +#endif diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index c807174363..27c154b8b3 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -127,4 +127,5 @@ obj-$(CONFIG_MX5) += mx5/ obj-$(CONFIG_MX6) += mx6/ obj-$(CONFIG_MX7) += mx7/ obj-$(CONFIG_ARCH_MX7ULP) += mx7ulp/ +obj-$(CONFIG_MX8M) += mx8m/
diff --git a/arch/arm/mach-imx/mx8m/Makefile b/arch/arm/mach-imx/mx8m/Makefile index 05f38842f0..b1c5d74aab 100644 --- a/arch/arm/mach-imx/mx8m/Makefile +++ b/arch/arm/mach-imx/mx8m/Makefile @@ -4,4 +4,5 @@ # SPDX-License-Identifier: GPL-2.0+ #
-obj-y += clock.o clock_slice.o +obj-y += lowlevel_init.o +obj-y += clock.o clock_slice.o soc.o diff --git a/arch/arm/mach-imx/mx8m/lowlevel_init.S b/arch/arm/mach-imx/mx8m/lowlevel_init.S new file mode 100644 index 0000000000..d388f3ba95 --- /dev/null +++ b/arch/arm/mach-imx/mx8m/lowlevel_init.S @@ -0,0 +1,63 @@ +/* + * Copyright 2017 NXP + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> + +.align 8 +.global rom_pointer +rom_pointer: + .space 256 + +/* + * Routine: save_boot_params (called after reset from start.S) + */ + +.global save_boot_params +save_boot_params: + /* The firmware provided ATAG/FDT address can be found in r2/x0 */ + adr x0, rom_pointer + stp x1, x2, [x0], #16 + stp x3, x4, [x0], #16 + stp x5, x6, [x0], #16 + stp x7, x8, [x0], #16 + stp x9, x10, [x0], #16 + stp x11, x12, [x0], #16 + stp x13, x14, [x0], #16 + stp x15, x16, [x0], #16 + stp x17, x18, [x0], #16 + stp x19, x20, [x0], #16 + stp x21, x22, [x0], #16 + stp x23, x24, [x0], #16 + stp x25, x26, [x0], #16 + stp x27, x28, [x0], #16 + stp x29, x30, [x0], #16 + mov x30, sp + str x30, [x0], #8 + + /* Returns */ + b save_boot_params_ret + +.global restore_boot_params +restore_boot_params: + adr x0, rom_pointer + ldp x1, x2, [x0], #16 + ldp x3, x4, [x0], #16 + ldp x5, x6, [x0], #16 + ldp x7, x8, [x0], #16 + ldp x9, x10, [x0], #16 + ldp x11, x12, [x0], #16 + ldp x13, x14, [x0], #16 + ldp x15, x16, [x0], #16 + ldp x17, x18, [x0], #16 + ldp x19, x20, [x0], #16 + ldp x21, x22, [x0], #16 + ldp x23, x24, [x0], #16 + ldp x25, x26, [x0], #16 + ldp x27, x28, [x0], #16 + ldp x29, x30, [x0], #16 + ldr x0, [x0] + mov sp, x0 + ret diff --git a/arch/arm/mach-imx/mx8m/soc.c b/arch/arm/mach-imx/mx8m/soc.c new file mode 100644 index 0000000000..740e84caa4 --- /dev/null +++ b/arch/arm/mach-imx/mx8m/soc.c @@ -0,0 +1,539 @@ +/* + * Copyright 2017 NXP + * + * Peng Fan peng.fan@nxp.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/arch/imx-regs.h> +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/sys_proto.h> +#include <asm/mach-imx/hab.h> +#include <asm/mach-imx/boot_mode.h> +#include <asm/mach-imx/syscounter.h> +#include <asm/armv8/mmu.h> +#include <errno.h> +#include <fdt_support.h> +#include <fsl_wdog.h> +#include <imx_sip.h> + +DECLARE_GLOBAL_DATA_PTR; + +#if defined(CONFIG_SECURE_BOOT) +struct imx_sec_config_fuse_t const imx_sec_config_fuse = { + .bank = 1, + .word = 3, +}; +#endif + +/* + * OCOTP_TESTER3[9:8] (see Fusemap Description Table offset 0x440) + * defines a 2-bit SPEED_GRADING + */ +#define OCOTP_TESTER3_SPEED_SHIFT 8 +#define OCOTP_TESTER3_SPEED_800MHZ 0 +#define OCOTP_TESTER3_SPEED_1GHZ 1 +#define OCOTP_TESTER3_SPEED_1300MHZ 2 +#define OCOTP_TESTER3_SPEED_1500MHZ 3 + +u32 get_cpu_speed_grade_hz(void) +{ + 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; + u32 val; + + val = readl(&fuse->tester3); + val >>= OCOTP_TESTER3_SPEED_SHIFT; + val &= 0x3; + + switch (val) { + case OCOTP_TESTER3_SPEED_800MHZ: + return 800000000; + case OCOTP_TESTER3_SPEED_1GHZ: + return 1000000000; + case OCOTP_TESTER3_SPEED_1300MHZ: + return 1300000000; + case OCOTP_TESTER3_SPEED_1500MHZ: + return 1500000000; + } + return 0; +} + +/* + * OCOTP_TESTER3[7:6] (see Fusemap Description Table offset 0x440) + * defines a 2-bit SPEED_GRADING + */ +#define OCOTP_TESTER3_TEMP_SHIFT 6 + +/* CPU Temperature Grades */ +#define TEMP_COMMERCIAL 0 +#define TEMP_EXTCOMMERCIAL 1 +#define TEMP_INDUSTRIAL 2 +#define TEMP_AUTOMOTIVE 3 + +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; + u32 val; + + val = readl(&fuse->tester3); + val >>= OCOTP_TESTER3_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; +} + +int timer_init(void) +{ +#ifdef CONFIG_SPL_BUILD + struct sctr_regs *sctr = (struct sctr_regs *)SYSCNT_CTRL_BASE_ADDR; + unsigned long freq = readl(&sctr->cntfid0); + + /* Update with accurate clock frequency */ + asm volatile("msr cntfrq_el0, %0" : : "r" (freq) : "memory"); + + clrsetbits_le32(&sctr->cntcr, SC_CNTCR_FREQ0 | SC_CNTCR_FREQ1, + SC_CNTCR_FREQ0 | SC_CNTCR_ENABLE | SC_CNTCR_HDBG); +#endif + + gd->arch.tbl = 0; + gd->arch.tbu = 0; + + return 0; +} + +void enable_tzc380(void) +{ + struct iomuxc_gpr_base_regs *gpr = + (struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR; + + /* Enable TZASC and lock setting */ + setbits_le32(&gpr->gpr[10], GPR_TZASC_EN); + setbits_le32(&gpr->gpr[10], GPR_TZASC_EN_LOCK); +} + +void set_wdog_reset(struct wdog_regs *wdog) +{ + /* + * Output WDOG_B signal to reset external pmic or POR_B decided by + * the board desgin. Without external reset, the peripherals/DDR/ + * PMIC are not reset, that may cause system working abnormal. + * WDZST bit is write-once only bit. Align this bit in kernel, + * otherwise kernel code will have no chance to set this bit. + */ + setbits_le16(&wdog->wcr, WDOG_WDT_MASK | WDOG_WDZST_MASK); +} + +static struct mm_region imx8m_mem_map[] = { + { + .virt = 0x0UL, + .phys = 0x0UL, + .size = 0x100000UL, + .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | + PTE_BLOCK_OUTER_SHARE + }, { + .virt = 0x100000UL, + .phys = 0x100000UL, + .size = 0x8000UL, + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | + PTE_BLOCK_NON_SHARE | + PTE_BLOCK_PXN | PTE_BLOCK_UXN + }, { + .virt = 0x7C0000UL, + .phys = 0x7C0000UL, + .size = 0x80000UL, + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | + PTE_BLOCK_NON_SHARE | + PTE_BLOCK_PXN | PTE_BLOCK_UXN + }, { + .virt = 0x900000UL, + .phys = 0x900000UL, + .size = 0x200000UL, + .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | + PTE_BLOCK_OUTER_SHARE + }, { + .virt = 0xB00000UL, + .phys = 0xB00000UL, + .size = 0x3f500000UL, + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | + PTE_BLOCK_NON_SHARE | + PTE_BLOCK_PXN | PTE_BLOCK_UXN + }, { + .virt = 0x40000000UL, + .phys = 0x40000000UL, + .size = 0xC0000000UL, + .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | + PTE_BLOCK_OUTER_SHARE + }, { + .virt = 0x100000000UL, + .phys = 0x100000000UL, + .size = 0x040000000UL, + .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | + PTE_BLOCK_OUTER_SHARE + }, { + /* List terminator */ + 0, + } +}; + +struct mm_region *mem_map = imx8m_mem_map; + +u32 get_cpu_rev(void) +{ + struct anamix_pll *ana_pll = (struct anamix_pll *)ANA_PLL_BASE_ADDR; + u32 reg = readl(&ana_pll->digprog); + u32 type = (reg >> 16) & 0xff; + u32 rom_version; + + reg &= 0xff; + + if (reg == 0x10) { + /* + * For B0 chip, the DIGPROG is not updated, still TO1.0. + * we have to check ROM version further + */ + rom_version = readl((void __iomem *)0x800); + if (rom_version != 0x10) { + rom_version = readl((void __iomem *)0x83c); + if (rom_version >= 0x20) + reg = 0x20; + } + } + + return (type << 12) | reg; +} + +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; + struct wdog_regs *wdog3 = (struct wdog_regs *)WDOG3_BASE_ADDR; + + /* Write to the PDE (Power Down Enable) bit */ + writew(enable, &wdog1->wmcr); + writew(enable, &wdog2->wmcr); + writew(enable, &wdog3->wmcr); +} + +int arch_cpu_init(void) +{ + /* + * Init timer at very early state, because sscg pll setting + * will use it + */ + timer_init(); + + if (IS_ENABLED(CONFIG_SPL_BUILD)) { + clock_init(); + imx_set_wdog_powerdown(false); + } + + 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[9]; + struct fuse_bank9_regs *fuse = + (struct fuse_bank9_regs *)bank->fuse_regs; + 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 + +#ifdef CONFIG_IMX_BOOTAUX +int arch_auxiliary_core_up(u32 core_id, ulong boot_private_data) +{ + 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 */ + call_imx_sip(IMX_SIP_SRC, IMX_SIP_SRC_M4_START, 0, 0); + + return 0; +} + +int arch_auxiliary_core_check_up(u32 core_id) +{ + return call_imx_sip(IMX_SIP_SRC, IMX_SIP_SRC_M4_STARTED, 0, 0); +} +#endif + +enum boot_device get_boot_device(void) +{ + struct bootrom_sw_info **p = + is_soc_rev(CHIP_REV_1_0) ? + (struct bootrom_sw_info **)ROM_SW_INFO_ADDR_A0 : + (struct bootrom_sw_info **)ROM_SW_INFO_ADDR; + + enum boot_device boot_dev = SD1_BOOT; + u8 boot_type = (*p)->boot_dev_type; + u8 boot_instance = (*p)->boot_dev_instance; + + switch (boot_type) { + case BOOT_TYPE_SD: + boot_dev = boot_instance + SD1_BOOT; + break; + case BOOT_TYPE_MMC: + boot_dev = boot_instance + MMC1_BOOT; + break; + case BOOT_TYPE_NAND: + boot_dev = NAND_BOOT; + break; + case BOOT_TYPE_QSPI: + boot_dev = QSPI_BOOT; + break; + case BOOT_TYPE_WEIM: + boot_dev = WEIM_NOR_BOOT; + break; + case BOOT_TYPE_SPINOR: + boot_dev = SPI_NOR_BOOT; + break; + case BOOT_TYPE_USB: + boot_dev = USB_BOOT; + break; + default: + break; + } + + return boot_dev; +} + +bool is_usb_boot(void) +{ + return get_boot_device() == USB_BOOT; +} + +#ifdef CONFIG_ENV_IS_IN_MMC +__weak int board_mmc_get_env_dev(int devno) +{ + return CONFIG_SYS_MMC_ENV_DEV; +} + +int mmc_get_env_dev(void) +{ + struct bootrom_sw_info **p = + is_soc_rev(CHIP_REV_1_0) ? + (struct bootrom_sw_info **)ROM_SW_INFO_ADDR_A0 : + (struct bootrom_sw_info **)ROM_SW_INFO_ADDR; + int devno = (*p)->boot_dev_instance; + u8 boot_type = (*p)->boot_dev_type; + + /* If not boot from sd/mmc, use default value */ + if ((boot_type != BOOT_TYPE_SD) && (boot_type != BOOT_TYPE_MMC)) + return CONFIG_SYS_MMC_ENV_DEV; + + return board_mmc_get_env_dev(devno); +} +#endif + +#ifdef CONFIG_OF_SYSTEM_SETUP +static int ft_add_optee_node(void *fdt, bd_t *bd) +{ + const char *path, *subpath; + int offs; + + /* + * No TEE space allocated indicating no TEE running, so no + * need to add optee node in dts + */ + if (!rom_pointer[1]) + return 0; + + offs = fdt_increase_size(fdt, 512); + if (offs) { + printf("No Space for dtb\n"); + return offs; + } + + path = "/firmware"; + offs = fdt_path_offset(fdt, path); + if (offs < 0) { + path = "/"; + offs = fdt_path_offset(fdt, path); + + if (offs < 0) { + printf("Could not find root node.\n"); + return offs; + } + + subpath = "firmware"; + offs = fdt_add_subnode(fdt, offs, subpath); + if (offs < 0) { + printf("Could not create %s node.\n", subpath); + return offs; + } + } + + subpath = "optee"; + offs = fdt_add_subnode(fdt, offs, subpath); + if (offs < 0) { + printf("Could not create %s node.\n", subpath); + return offs; + } + + fdt_setprop_string(fdt, offs, "compatible", "linaro,optee-tz"); + fdt_setprop_string(fdt, offs, "method", "smc"); + + return 0; +} + +int ft_system_setup(void *blob, bd_t *bd) +{ + static const char * const status = "disabled"; + static const char * const usb_dwc3_path = "/usb@38100000/dwc3"; + static const char * const speed = "high-speed"; + int i = 0; + int rc; + int nodeoff; + + if (get_boot_device() == USB_BOOT) { + static const char * const nodes_path[] = { + "/dcss@32e00000", + "/hdmi@32c00000", + "/hdmi_cec@32c33800", + "/hdmi_drm@32c00000", + "/display-subsystem", + "/sound-hdmi" + }; + + for (i = 0; i < ARRAY_SIZE(nodes_path); i++) { + nodeoff = fdt_path_offset(blob, nodes_path[i]); + if (nodeoff < 0) + continue; /* Not found, skip it */ + + printf("Found %s node\n", nodes_path[i]); + +add_status: + rc = fdt_setprop(blob, nodeoff, "status", status, + strlen(status) + 1); + if (rc) { + if (rc == -FDT_ERR_NOSPACE) { + rc = fdt_increase_size(blob, 512); + if (!rc) + goto add_status; + } + printf("Unable to update property %s:%s, err=%s\n", + nodes_path[i], "status", + fdt_strerror(rc)); + return rc; + } + + printf("Modify %s:%s disabled\n", + nodes_path[i], "status"); + } + + nodeoff = fdt_path_offset(blob, usb_dwc3_path); + if (nodeoff >= 0) { + printf("Found %s node\n", usb_dwc3_path); + +usb_modify_speed: + + rc = fdt_setprop(blob, nodeoff, "maximum-speed", + speed, strlen(speed) + 1); + if (rc) { + if (rc == -FDT_ERR_NOSPACE) { + rc = fdt_increase_size(blob, 512); + if (!rc) + goto usb_modify_speed; + } + printf("Unable to set property %s:%s, err=%s\n", + usb_dwc3_path, "maximum-speed", + fdt_strerror(rc)); + return rc; + } + + printf("Modify %s:%s = %s\n", + usb_dwc3_path, "maximum-speed", speed); + } else { + printf("Can't found %s node\n", usb_dwc3_path); + } + } + + /* Disable the CPU idle for A0 chip since the HW does not support it */ + if (is_soc_rev(CHIP_REV_1_0)) { + static const char * const nodes_path[] = { + "/cpus/cpu@0", + "/cpus/cpu@1", + "/cpus/cpu@2", + "/cpus/cpu@3", + }; + + for (i = 0; i < ARRAY_SIZE(nodes_path); i++) { + nodeoff = fdt_path_offset(blob, nodes_path[i]); + if (nodeoff < 0) + continue; /* Not found, skip it */ + + printf("Found %s node\n", nodes_path[i]); + + rc = fdt_delprop(blob, nodeoff, "cpu-idle-states"); + if (rc) { + printf("Unable to update property %s:%s, err=%s\n", + nodes_path[i], "status", fdt_strerror(rc)); + return rc; + } + + printf("Remove %s:%s\n", nodes_path[i], + "cpu-idle-states"); + } + } + + return ft_add_optee_node(blob, bd); +} +#endif + +void reset_cpu(ulong addr) +{ + struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR; + + /* Clear WDA to trigger WDOG_B immediately */ + writew((WCR_WDE | WCR_SRS), &wdog->wcr); + + while (1) { + /* + * spin for .5 seconds before reset + */ + } +}