1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2016 Freescale Semiconductor, Inc.
11 #include <asm/arch/clock.h>
12 #include <asm/arch/imx-regs.h>
13 #include <asm/arch/sys_proto.h>
14 #include <asm/mach-imx/boot_mode.h>
15 #include <asm/mach-imx/hab.h>
16 #include <linux/bitops.h>
18 #define PMC0_BASE_ADDR 0x410a1000
19 #define PMC0_CTRL 0x28
20 #define PMC0_CTRL_LDOEN BIT(31)
21 #define PMC0_CTRL_LDOOKDIS BIT(30)
22 #define PMC0_CTRL_PMC1ON BIT(24)
23 #define PMC1_BASE_ADDR 0x40400000
25 #define PMC1_STOP 0x10
26 #define PMC1_VLPS 0x14
27 #define PMC1_LDOVL_SHIFT 16
28 #define PMC1_LDOVL_MASK (0x3f << PMC1_LDOVL_SHIFT)
29 #define PMC1_LDOVL_900 0x1e
30 #define PMC1_LDOVL_950 0x23
31 #define PMC1_STATUS 0x20
32 #define PMC1_STATUS_LDOVLF BIT(8)
34 static char *get_reset_cause(char *);
36 #if defined(CONFIG_IMX_HAB)
37 struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
43 #define ROM_VERSION_ADDR 0x80
46 /* Check the ROM version for cpu revision */
47 u32 rom_version = readl((void __iomem *)ROM_VERSION_ADDR);
49 return (MXC_CPU_MX7ULP << 12) | (rom_version & 0xFF);
52 #ifdef CONFIG_REVISION_TAG
53 u32 __weak get_board_rev(void)
59 enum bt_mode get_boot_mode(void)
63 bt0_cfg = readl(CMC0_RBASE + 0x40);
64 bt0_cfg &= (BT0CFG_LPBOOT_MASK | BT0CFG_DUALBOOT_MASK);
66 if (!(bt0_cfg & BT0CFG_LPBOOT_MASK)) {
67 /* No low power boot */
68 if (bt0_cfg & BT0CFG_DUALBOOT_MASK)
74 return LOW_POWER_BOOT;
77 int arch_cpu_init(void)
82 #ifdef CONFIG_BOARD_POSTCLK_INIT
83 int board_postclk_init(void)
89 #define UNLOCK_WORD0 0xC520 /* 1st unlock word */
90 #define UNLOCK_WORD1 0xD928 /* 2nd unlock word */
91 #define REFRESH_WORD0 0xA602 /* 1st refresh word */
92 #define REFRESH_WORD1 0xB480 /* 2nd refresh word */
94 static void disable_wdog(u32 wdog_base)
96 writel(UNLOCK_WORD0, (wdog_base + 0x04));
97 writel(UNLOCK_WORD1, (wdog_base + 0x04));
98 writel(0x0, (wdog_base + 0x0C)); /* Set WIN to 0 */
99 writel(0x400, (wdog_base + 0x08)); /* Set timeout to default 0x400 */
100 writel(0x120, (wdog_base + 0x00)); /* Disable it and set update */
102 writel(REFRESH_WORD0, (wdog_base + 0x04)); /* Refresh the CNT */
103 writel(REFRESH_WORD1, (wdog_base + 0x04));
109 * ROM will configure WDOG1, disable it or enable it
110 * depending on FUSE. The update bit is set for reconfigurable.
111 * We have to use unlock sequence to reconfigure it.
112 * WDOG2 is not touched by ROM, so it will have default value
113 * which is enabled. We can directly configure it.
114 * To simplify the codes, we still use same reconfigure
115 * process as WDOG1. Because the update bit is not set for
116 * WDOG2, the unlock sequence won't take effect really.
117 * It actually directly configure the wdog.
118 * In this function, we will disable both WDOG1 and WDOG2,
119 * and set update bit for both. So that kernel can reconfigure them.
121 disable_wdog(WDG1_RBASE);
122 disable_wdog(WDG2_RBASE);
125 static bool ldo_mode_is_enabled(void)
129 reg = readl(PMC0_BASE_ADDR + PMC0_CTRL);
130 if (reg & PMC0_CTRL_LDOEN)
136 #if !defined(CONFIG_SPL) || (defined(CONFIG_SPL) && defined(CONFIG_SPL_BUILD))
137 #if defined(CONFIG_LDO_ENABLED_MODE)
138 static void init_ldo_mode(void)
142 if (ldo_mode_is_enabled())
146 setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_LDOOKDIS);
148 /* Set LDOVL to 0.95V in PMC1_RUN */
149 reg = readl(PMC1_BASE_ADDR + PMC1_RUN);
150 reg &= ~PMC1_LDOVL_MASK;
151 reg |= (PMC1_LDOVL_950 << PMC1_LDOVL_SHIFT);
152 writel(PMC1_BASE_ADDR + PMC1_RUN, reg);
154 /* Wait for LDOVLF to be cleared */
155 reg = readl(PMC1_BASE_ADDR + PMC1_STATUS);
156 while (reg & PMC1_STATUS_LDOVLF)
159 /* Set LDOVL to 0.95V in PMC1_STOP */
160 reg = readl(PMC1_BASE_ADDR + PMC1_STOP);
161 reg &= ~PMC1_LDOVL_MASK;
162 reg |= (PMC1_LDOVL_950 << PMC1_LDOVL_SHIFT);
163 writel(PMC1_BASE_ADDR + PMC1_STOP, reg);
165 /* Set LDOVL to 0.90V in PMC1_VLPS */
166 reg = readl(PMC1_BASE_ADDR + PMC1_VLPS);
167 reg &= ~PMC1_LDOVL_MASK;
168 reg |= (PMC1_LDOVL_900 << PMC1_LDOVL_SHIFT);
169 writel(PMC1_BASE_ADDR + PMC1_VLPS, reg);
172 setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_LDOEN);
174 /* Set the PMC1ON bit */
175 setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_PMC1ON);
184 /* clock configuration. */
187 if (soc_rev() < CHIP_REV_2_0) {
188 /* enable dumb pmic */
189 writel((readl(SNVS_LP_LPCR) | SNVS_LPCR_DPEN), SNVS_LP_LPCR);
192 #if defined(CONFIG_LDO_ENABLED_MODE)
199 #ifndef CONFIG_ULP_WATCHDOG
200 void reset_cpu(ulong addr)
202 setbits_le32(SIM0_RBASE, SIM_SOPT1_A7_SW_RESET);
208 #if defined(CONFIG_DISPLAY_CPUINFO)
209 const char *get_imx_type(u32 imxtype)
214 int print_cpuinfo(void)
219 cpurev = get_cpu_rev();
221 printf("CPU: Freescale i.MX%s rev%d.%d at %d MHz\n",
222 get_imx_type((cpurev & 0xFF000) >> 12),
223 (cpurev & 0x000F0) >> 4, (cpurev & 0x0000F) >> 0,
224 mxc_get_clock(MXC_ARM_CLK) / 1000000);
226 printf("Reset cause: %s\n", get_reset_cause(cause));
228 printf("Boot mode: ");
229 switch (get_boot_mode()) {
231 printf("Low power boot\n");
234 printf("Dual boot\n");
238 printf("Single boot\n");
242 if (ldo_mode_is_enabled())
243 printf("PMC1: LDO enabled mode\n");
245 printf("PMC1: LDO bypass mode\n");
251 #define CMC_SRS_TAMPER (1 << 31)
252 #define CMC_SRS_SECURITY (1 << 30)
253 #define CMC_SRS_TZWDG (1 << 29)
254 #define CMC_SRS_JTAG_RST (1 << 28)
255 #define CMC_SRS_CORE1 (1 << 16)
256 #define CMC_SRS_LOCKUP (1 << 15)
257 #define CMC_SRS_SW (1 << 14)
258 #define CMC_SRS_WDG (1 << 13)
259 #define CMC_SRS_PIN_RESET (1 << 8)
260 #define CMC_SRS_WARM (1 << 4)
261 #define CMC_SRS_HVD (1 << 3)
262 #define CMC_SRS_LVD (1 << 2)
263 #define CMC_SRS_POR (1 << 1)
264 #define CMC_SRS_WUP (1 << 0)
266 static u32 reset_cause = -1;
268 static char *get_reset_cause(char *ret)
270 u32 cause1, cause = 0, srs = 0;
271 u32 *reg_ssrs = (u32 *)(SRC_BASE_ADDR + 0x28);
272 u32 *reg_srs = (u32 *)(SRC_BASE_ADDR + 0x20);
277 srs = readl(reg_srs);
278 cause1 = readl(reg_ssrs);
279 writel(cause1, reg_ssrs);
281 reset_cause = cause1;
283 cause = cause1 & (CMC_SRS_POR | CMC_SRS_WUP | CMC_SRS_WARM);
287 sprintf(ret, "%s", "POR");
290 sprintf(ret, "%s", "WUP");
293 cause = cause1 & (CMC_SRS_WDG | CMC_SRS_SW |
297 sprintf(ret, "%s", "WARM-WDG");
300 sprintf(ret, "%s", "WARM-SW");
302 case CMC_SRS_JTAG_RST:
303 sprintf(ret, "%s", "WARM-JTAG");
306 sprintf(ret, "%s", "WARM-UNKN");
311 sprintf(ret, "%s-%X", "UNKN", cause1);
315 debug("[%X] SRS[%X] %X - ", cause1, srs, srs^cause1);
319 #ifdef CONFIG_ENV_IS_IN_MMC
320 __weak int board_mmc_get_env_dev(int devno)
322 return CONFIG_SYS_MMC_ENV_DEV;
325 int mmc_get_env_dev(void)
330 /* If not boot from sd/mmc, use default value */
331 if (get_boot_mode() == LOW_POWER_BOOT)
332 return CONFIG_SYS_MMC_ENV_DEV;
334 bt1_cfg = readl(CMC1_RBASE + 0x40);
335 devno = (bt1_cfg >> 9) & 0x7;
337 return board_mmc_get_env_dev(devno);
341 enum boot_device get_boot_device(void)
343 struct bootrom_sw_info **p =
344 (struct bootrom_sw_info **)ROM_SW_INFO_ADDR;
346 enum boot_device boot_dev = SD1_BOOT;
347 u8 boot_type = (*p)->boot_dev_type;
348 u8 boot_instance = (*p)->boot_dev_instance;
352 boot_dev = boot_instance + SD1_BOOT;
355 boot_dev = boot_instance + MMC1_BOOT;