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https://github.com/AsahiLinux/u-boot
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0619af0942
The LDOVL definitions is common to all the modes, not only RUN mode, so in order to avoid confusion, remove the _RUN notation from the PMC1 LDOVL definitions. Signed-off-by: Fabio Estevam <festevam@gmail.com>
359 lines
8.1 KiB
C
359 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Freescale Semiconductor, Inc.
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*/
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#include <init.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/mach-imx/boot_mode.h>
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#include <asm/mach-imx/hab.h>
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#define PMC0_BASE_ADDR 0x410a1000
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#define PMC0_CTRL 0x28
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#define PMC0_CTRL_LDOEN BIT(31)
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#define PMC0_CTRL_LDOOKDIS BIT(30)
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#define PMC0_CTRL_PMC1ON BIT(24)
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#define PMC1_BASE_ADDR 0x40400000
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#define PMC1_RUN 0x8
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#define PMC1_STOP 0x10
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#define PMC1_VLPS 0x14
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#define PMC1_LDOVL_SHIFT 16
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#define PMC1_LDOVL_MASK (0x3f << PMC1_LDOVL_SHIFT)
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#define PMC1_LDOVL_900 0x1e
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#define PMC1_LDOVL_950 0x23
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#define PMC1_STATUS 0x20
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#define PMC1_STATUS_LDOVLF BIT(8)
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static char *get_reset_cause(char *);
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#if defined(CONFIG_IMX_HAB)
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struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
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.bank = 29,
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.word = 6,
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};
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#endif
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#define ROM_VERSION_ADDR 0x80
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u32 get_cpu_rev(void)
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{
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/* Check the ROM version for cpu revision */
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u32 rom_version = readl((void __iomem *)ROM_VERSION_ADDR);
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return (MXC_CPU_MX7ULP << 12) | (rom_version & 0xFF);
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}
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#ifdef CONFIG_REVISION_TAG
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u32 __weak get_board_rev(void)
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{
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return get_cpu_rev();
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}
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#endif
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enum bt_mode get_boot_mode(void)
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{
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u32 bt0_cfg = 0;
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bt0_cfg = readl(CMC0_RBASE + 0x40);
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bt0_cfg &= (BT0CFG_LPBOOT_MASK | BT0CFG_DUALBOOT_MASK);
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if (!(bt0_cfg & BT0CFG_LPBOOT_MASK)) {
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/* No low power boot */
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if (bt0_cfg & BT0CFG_DUALBOOT_MASK)
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return DUAL_BOOT;
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else
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return SINGLE_BOOT;
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}
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return LOW_POWER_BOOT;
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}
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int arch_cpu_init(void)
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{
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return 0;
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}
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#ifdef CONFIG_BOARD_POSTCLK_INIT
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int board_postclk_init(void)
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{
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return 0;
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}
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#endif
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#define UNLOCK_WORD0 0xC520 /* 1st unlock word */
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#define UNLOCK_WORD1 0xD928 /* 2nd unlock word */
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#define REFRESH_WORD0 0xA602 /* 1st refresh word */
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#define REFRESH_WORD1 0xB480 /* 2nd refresh word */
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static void disable_wdog(u32 wdog_base)
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{
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writel(UNLOCK_WORD0, (wdog_base + 0x04));
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writel(UNLOCK_WORD1, (wdog_base + 0x04));
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writel(0x0, (wdog_base + 0x0C)); /* Set WIN to 0 */
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writel(0x400, (wdog_base + 0x08)); /* Set timeout to default 0x400 */
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writel(0x120, (wdog_base + 0x00)); /* Disable it and set update */
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writel(REFRESH_WORD0, (wdog_base + 0x04)); /* Refresh the CNT */
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writel(REFRESH_WORD1, (wdog_base + 0x04));
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}
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void init_wdog(void)
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{
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/*
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* ROM will configure WDOG1, disable it or enable it
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* depending on FUSE. The update bit is set for reconfigurable.
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* We have to use unlock sequence to reconfigure it.
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* WDOG2 is not touched by ROM, so it will have default value
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* which is enabled. We can directly configure it.
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* To simplify the codes, we still use same reconfigure
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* process as WDOG1. Because the update bit is not set for
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* WDOG2, the unlock sequence won't take effect really.
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* It actually directly configure the wdog.
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* In this function, we will disable both WDOG1 and WDOG2,
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* and set update bit for both. So that kernel can reconfigure them.
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*/
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disable_wdog(WDG1_RBASE);
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disable_wdog(WDG2_RBASE);
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}
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#if defined(CONFIG_LDO_ENABLED_MODE)
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static void init_ldo_mode(void)
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{
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unsigned int reg;
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/* Set LDOOKDIS */
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setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_LDOOKDIS);
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/* Set LDOVL to 0.95V in PMC1_RUN */
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reg = readl(PMC1_BASE_ADDR + PMC1_RUN);
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reg &= ~PMC1_LDOVL_MASK;
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reg |= (PMC1_LDOVL_950 << PMC1_LDOVL_SHIFT);
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writel(PMC1_BASE_ADDR + PMC1_RUN, reg);
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/* Wait for LDOVLF to be cleared */
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reg = readl(PMC1_BASE_ADDR + PMC1_STATUS);
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while (reg & PMC1_STATUS_LDOVLF)
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;
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/* Set LDOVL to 0.95V in PMC1_STOP */
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reg = readl(PMC1_BASE_ADDR + PMC1_STOP);
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reg &= ~PMC1_LDOVL_MASK;
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reg |= (PMC1_LDOVL_950 << PMC1_LDOVL_SHIFT);
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writel(PMC1_BASE_ADDR + PMC1_STOP, reg);
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/* Set LDOVL to 0.90V in PMC1_VLPS */
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reg = readl(PMC1_BASE_ADDR + PMC1_VLPS);
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reg &= ~PMC1_LDOVL_MASK;
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reg |= (PMC1_LDOVL_900 << PMC1_LDOVL_SHIFT);
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writel(PMC1_BASE_ADDR + PMC1_VLPS, reg);
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/* Set LDOEN bit */
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setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_LDOEN);
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/* Set the PMC1ON bit */
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setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_PMC1ON);
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}
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#endif
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void s_init(void)
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{
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/* Disable wdog */
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init_wdog();
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/* clock configuration. */
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clock_init();
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if (soc_rev() < CHIP_REV_2_0) {
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/* enable dumb pmic */
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writel((readl(SNVS_LP_LPCR) | SNVS_LPCR_DPEN), SNVS_LP_LPCR);
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}
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#if defined(CONFIG_LDO_ENABLED_MODE)
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init_ldo_mode();
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#endif
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return;
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}
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#ifndef CONFIG_ULP_WATCHDOG
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void reset_cpu(ulong addr)
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{
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setbits_le32(SIM0_RBASE, SIM_SOPT1_A7_SW_RESET);
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while (1)
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;
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}
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#endif
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#if defined(CONFIG_DISPLAY_CPUINFO)
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const char *get_imx_type(u32 imxtype)
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{
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return "7ULP";
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}
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#define PMC0_BASE_ADDR 0x410a1000
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#define PMC0_CTRL 0x28
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#define PMC0_CTRL_LDOEN BIT(31)
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static bool ldo_mode_is_enabled(void)
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{
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unsigned int reg;
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reg = readl(PMC0_BASE_ADDR + PMC0_CTRL);
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if (reg & PMC0_CTRL_LDOEN)
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return true;
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else
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return false;
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}
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int print_cpuinfo(void)
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{
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u32 cpurev;
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char cause[18];
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cpurev = get_cpu_rev();
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printf("CPU: Freescale i.MX%s rev%d.%d at %d MHz\n",
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get_imx_type((cpurev & 0xFF000) >> 12),
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(cpurev & 0x000F0) >> 4, (cpurev & 0x0000F) >> 0,
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mxc_get_clock(MXC_ARM_CLK) / 1000000);
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printf("Reset cause: %s\n", get_reset_cause(cause));
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printf("Boot mode: ");
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switch (get_boot_mode()) {
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case LOW_POWER_BOOT:
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printf("Low power boot\n");
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break;
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case DUAL_BOOT:
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printf("Dual boot\n");
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break;
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case SINGLE_BOOT:
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default:
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printf("Single boot\n");
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break;
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}
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if (ldo_mode_is_enabled())
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printf("PMC1: LDO enabled mode\n");
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else
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printf("PMC1: LDO bypass mode\n");
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return 0;
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}
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#endif
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#define CMC_SRS_TAMPER (1 << 31)
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#define CMC_SRS_SECURITY (1 << 30)
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#define CMC_SRS_TZWDG (1 << 29)
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#define CMC_SRS_JTAG_RST (1 << 28)
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#define CMC_SRS_CORE1 (1 << 16)
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#define CMC_SRS_LOCKUP (1 << 15)
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#define CMC_SRS_SW (1 << 14)
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#define CMC_SRS_WDG (1 << 13)
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#define CMC_SRS_PIN_RESET (1 << 8)
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#define CMC_SRS_WARM (1 << 4)
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#define CMC_SRS_HVD (1 << 3)
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#define CMC_SRS_LVD (1 << 2)
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#define CMC_SRS_POR (1 << 1)
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#define CMC_SRS_WUP (1 << 0)
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static u32 reset_cause = -1;
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static char *get_reset_cause(char *ret)
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{
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u32 cause1, cause = 0, srs = 0;
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u32 *reg_ssrs = (u32 *)(SRC_BASE_ADDR + 0x28);
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u32 *reg_srs = (u32 *)(SRC_BASE_ADDR + 0x20);
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if (!ret)
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return "null";
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srs = readl(reg_srs);
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cause1 = readl(reg_ssrs);
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writel(cause1, reg_ssrs);
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reset_cause = cause1;
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cause = cause1 & (CMC_SRS_POR | CMC_SRS_WUP | CMC_SRS_WARM);
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switch (cause) {
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case CMC_SRS_POR:
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sprintf(ret, "%s", "POR");
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break;
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case CMC_SRS_WUP:
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sprintf(ret, "%s", "WUP");
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break;
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case CMC_SRS_WARM:
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cause = cause1 & (CMC_SRS_WDG | CMC_SRS_SW |
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CMC_SRS_JTAG_RST);
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switch (cause) {
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case CMC_SRS_WDG:
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sprintf(ret, "%s", "WARM-WDG");
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break;
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case CMC_SRS_SW:
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sprintf(ret, "%s", "WARM-SW");
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break;
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case CMC_SRS_JTAG_RST:
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sprintf(ret, "%s", "WARM-JTAG");
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break;
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default:
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sprintf(ret, "%s", "WARM-UNKN");
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break;
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}
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break;
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default:
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sprintf(ret, "%s-%X", "UNKN", cause1);
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break;
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}
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debug("[%X] SRS[%X] %X - ", cause1, srs, srs^cause1);
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return ret;
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}
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#ifdef CONFIG_ENV_IS_IN_MMC
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__weak int board_mmc_get_env_dev(int devno)
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{
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return CONFIG_SYS_MMC_ENV_DEV;
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}
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int mmc_get_env_dev(void)
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{
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int devno = 0;
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u32 bt1_cfg = 0;
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/* If not boot from sd/mmc, use default value */
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if (get_boot_mode() == LOW_POWER_BOOT)
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return CONFIG_SYS_MMC_ENV_DEV;
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bt1_cfg = readl(CMC1_RBASE + 0x40);
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devno = (bt1_cfg >> 9) & 0x7;
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return board_mmc_get_env_dev(devno);
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}
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#endif
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enum boot_device get_boot_device(void)
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{
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struct bootrom_sw_info **p =
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(struct bootrom_sw_info **)ROM_SW_INFO_ADDR;
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enum boot_device boot_dev = SD1_BOOT;
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u8 boot_type = (*p)->boot_dev_type;
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u8 boot_instance = (*p)->boot_dev_instance;
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switch (boot_type) {
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case BOOT_TYPE_SD:
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boot_dev = boot_instance + SD1_BOOT;
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break;
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case BOOT_TYPE_MMC:
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boot_dev = boot_instance + MMC1_BOOT;
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break;
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case BOOT_TYPE_USB:
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boot_dev = USB_BOOT;
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break;
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default:
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break;
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}
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return boot_dev;
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}
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