1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2016 Freescale Semiconductor, Inc.
7 #include <asm/arch/clock.h>
8 #include <asm/arch/imx-regs.h>
9 #include <asm/arch/sys_proto.h>
10 #include <asm/mach-imx/boot_mode.h>
11 #include <asm/mach-imx/hab.h>
13 #define PMC0_BASE_ADDR 0x410a1000
14 #define PMC0_CTRL 0x28
15 #define PMC0_CTRL_LDOEN BIT(31)
16 #define PMC0_CTRL_LDOOKDIS BIT(30)
17 #define PMC0_CTRL_PMC1ON BIT(24)
18 #define PMC1_BASE_ADDR 0x40400000
20 #define PMC1_STOP 0x10
21 #define PMC1_VLPS 0x14
22 #define PMC1_LDOVL_SHIFT 16
23 #define PMC1_LDOVL_MASK (0x3f << PMC1_LDOVL_SHIFT)
24 #define PMC1_LDOVL_900 0x1e
25 #define PMC1_LDOVL_950 0x23
26 #define PMC1_STATUS 0x20
27 #define PMC1_STATUS_LDOVLF BIT(8)
29 static char *get_reset_cause(char *);
31 #if defined(CONFIG_IMX_HAB)
32 struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
38 #define ROM_VERSION_ADDR 0x80
41 /* Check the ROM version for cpu revision */
42 u32 rom_version = readl((void __iomem *)ROM_VERSION_ADDR);
44 return (MXC_CPU_MX7ULP << 12) | (rom_version & 0xFF);
47 #ifdef CONFIG_REVISION_TAG
48 u32 __weak get_board_rev(void)
54 enum bt_mode get_boot_mode(void)
58 bt0_cfg = readl(CMC0_RBASE + 0x40);
59 bt0_cfg &= (BT0CFG_LPBOOT_MASK | BT0CFG_DUALBOOT_MASK);
61 if (!(bt0_cfg & BT0CFG_LPBOOT_MASK)) {
62 /* No low power boot */
63 if (bt0_cfg & BT0CFG_DUALBOOT_MASK)
69 return LOW_POWER_BOOT;
72 int arch_cpu_init(void)
77 #ifdef CONFIG_BOARD_POSTCLK_INIT
78 int board_postclk_init(void)
84 #define UNLOCK_WORD0 0xC520 /* 1st unlock word */
85 #define UNLOCK_WORD1 0xD928 /* 2nd unlock word */
86 #define REFRESH_WORD0 0xA602 /* 1st refresh word */
87 #define REFRESH_WORD1 0xB480 /* 2nd refresh word */
89 static void disable_wdog(u32 wdog_base)
91 writel(UNLOCK_WORD0, (wdog_base + 0x04));
92 writel(UNLOCK_WORD1, (wdog_base + 0x04));
93 writel(0x0, (wdog_base + 0x0C)); /* Set WIN to 0 */
94 writel(0x400, (wdog_base + 0x08)); /* Set timeout to default 0x400 */
95 writel(0x120, (wdog_base + 0x00)); /* Disable it and set update */
97 writel(REFRESH_WORD0, (wdog_base + 0x04)); /* Refresh the CNT */
98 writel(REFRESH_WORD1, (wdog_base + 0x04));
104 * ROM will configure WDOG1, disable it or enable it
105 * depending on FUSE. The update bit is set for reconfigurable.
106 * We have to use unlock sequence to reconfigure it.
107 * WDOG2 is not touched by ROM, so it will have default value
108 * which is enabled. We can directly configure it.
109 * To simplify the codes, we still use same reconfigure
110 * process as WDOG1. Because the update bit is not set for
111 * WDOG2, the unlock sequence won't take effect really.
112 * It actually directly configure the wdog.
113 * In this function, we will disable both WDOG1 and WDOG2,
114 * and set update bit for both. So that kernel can reconfigure them.
116 disable_wdog(WDG1_RBASE);
117 disable_wdog(WDG2_RBASE);
120 #if defined(CONFIG_LDO_ENABLED_MODE)
121 static void init_ldo_mode(void)
126 setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_LDOOKDIS);
128 /* Set LDOVL to 0.95V in PMC1_RUN */
129 reg = readl(PMC1_BASE_ADDR + PMC1_RUN);
130 reg &= ~PMC1_LDOVL_MASK;
131 reg |= (PMC1_LDOVL_950 << PMC1_LDOVL_SHIFT);
132 writel(PMC1_BASE_ADDR + PMC1_RUN, reg);
134 /* Wait for LDOVLF to be cleared */
135 reg = readl(PMC1_BASE_ADDR + PMC1_STATUS);
136 while (reg & PMC1_STATUS_LDOVLF)
139 /* Set LDOVL to 0.95V in PMC1_STOP */
140 reg = readl(PMC1_BASE_ADDR + PMC1_STOP);
141 reg &= ~PMC1_LDOVL_MASK;
142 reg |= (PMC1_LDOVL_950 << PMC1_LDOVL_SHIFT);
143 writel(PMC1_BASE_ADDR + PMC1_STOP, reg);
145 /* Set LDOVL to 0.90V in PMC1_VLPS */
146 reg = readl(PMC1_BASE_ADDR + PMC1_VLPS);
147 reg &= ~PMC1_LDOVL_MASK;
148 reg |= (PMC1_LDOVL_900 << PMC1_LDOVL_SHIFT);
149 writel(PMC1_BASE_ADDR + PMC1_VLPS, reg);
152 setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_LDOEN);
154 /* Set the PMC1ON bit */
155 setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_PMC1ON);
164 /* clock configuration. */
167 if (soc_rev() < CHIP_REV_2_0) {
168 /* enable dumb pmic */
169 writel((readl(SNVS_LP_LPCR) | SNVS_LPCR_DPEN), SNVS_LP_LPCR);
172 #if defined(CONFIG_LDO_ENABLED_MODE)
178 #ifndef CONFIG_ULP_WATCHDOG
179 void reset_cpu(ulong addr)
181 setbits_le32(SIM0_RBASE, SIM_SOPT1_A7_SW_RESET);
187 #if defined(CONFIG_DISPLAY_CPUINFO)
188 const char *get_imx_type(u32 imxtype)
193 #define PMC0_BASE_ADDR 0x410a1000
194 #define PMC0_CTRL 0x28
195 #define PMC0_CTRL_LDOEN BIT(31)
197 static bool ldo_mode_is_enabled(void)
201 reg = readl(PMC0_BASE_ADDR + PMC0_CTRL);
202 if (reg & PMC0_CTRL_LDOEN)
208 int print_cpuinfo(void)
213 cpurev = get_cpu_rev();
215 printf("CPU: Freescale i.MX%s rev%d.%d at %d MHz\n",
216 get_imx_type((cpurev & 0xFF000) >> 12),
217 (cpurev & 0x000F0) >> 4, (cpurev & 0x0000F) >> 0,
218 mxc_get_clock(MXC_ARM_CLK) / 1000000);
220 printf("Reset cause: %s\n", get_reset_cause(cause));
222 printf("Boot mode: ");
223 switch (get_boot_mode()) {
225 printf("Low power boot\n");
228 printf("Dual boot\n");
232 printf("Single boot\n");
236 if (ldo_mode_is_enabled())
237 printf("PMC1: LDO enabled mode\n");
239 printf("PMC1: LDO bypass mode\n");
245 #define CMC_SRS_TAMPER (1 << 31)
246 #define CMC_SRS_SECURITY (1 << 30)
247 #define CMC_SRS_TZWDG (1 << 29)
248 #define CMC_SRS_JTAG_RST (1 << 28)
249 #define CMC_SRS_CORE1 (1 << 16)
250 #define CMC_SRS_LOCKUP (1 << 15)
251 #define CMC_SRS_SW (1 << 14)
252 #define CMC_SRS_WDG (1 << 13)
253 #define CMC_SRS_PIN_RESET (1 << 8)
254 #define CMC_SRS_WARM (1 << 4)
255 #define CMC_SRS_HVD (1 << 3)
256 #define CMC_SRS_LVD (1 << 2)
257 #define CMC_SRS_POR (1 << 1)
258 #define CMC_SRS_WUP (1 << 0)
260 static u32 reset_cause = -1;
262 static char *get_reset_cause(char *ret)
264 u32 cause1, cause = 0, srs = 0;
265 u32 *reg_ssrs = (u32 *)(SRC_BASE_ADDR + 0x28);
266 u32 *reg_srs = (u32 *)(SRC_BASE_ADDR + 0x20);
271 srs = readl(reg_srs);
272 cause1 = readl(reg_ssrs);
273 writel(cause1, reg_ssrs);
275 reset_cause = cause1;
277 cause = cause1 & (CMC_SRS_POR | CMC_SRS_WUP | CMC_SRS_WARM);
281 sprintf(ret, "%s", "POR");
284 sprintf(ret, "%s", "WUP");
287 cause = cause1 & (CMC_SRS_WDG | CMC_SRS_SW |
291 sprintf(ret, "%s", "WARM-WDG");
294 sprintf(ret, "%s", "WARM-SW");
296 case CMC_SRS_JTAG_RST:
297 sprintf(ret, "%s", "WARM-JTAG");
300 sprintf(ret, "%s", "WARM-UNKN");
305 sprintf(ret, "%s-%X", "UNKN", cause1);
309 debug("[%X] SRS[%X] %X - ", cause1, srs, srs^cause1);
313 #ifdef CONFIG_ENV_IS_IN_MMC
314 __weak int board_mmc_get_env_dev(int devno)
316 return CONFIG_SYS_MMC_ENV_DEV;
319 int mmc_get_env_dev(void)
324 /* If not boot from sd/mmc, use default value */
325 if (get_boot_mode() == LOW_POWER_BOOT)
326 return CONFIG_SYS_MMC_ENV_DEV;
328 bt1_cfg = readl(CMC1_RBASE + 0x40);
329 devno = (bt1_cfg >> 9) & 0x7;
331 return board_mmc_get_env_dev(devno);
335 enum boot_device get_boot_device(void)
337 struct bootrom_sw_info **p =
338 (struct bootrom_sw_info **)ROM_SW_INFO_ADDR;
340 enum boot_device boot_dev = SD1_BOOT;
341 u8 boot_type = (*p)->boot_dev_type;
342 u8 boot_instance = (*p)->boot_dev_instance;
346 boot_dev = boot_instance + SD1_BOOT;
349 boot_dev = boot_instance + MMC1_BOOT;