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imx: mx8m: add soc related settings and files
[u-boot] / arch / arm / mach-imx / mx8m / soc.c
1 /*
2  * Copyright 2017 NXP
3  *
4  * Peng Fan <peng.fan@nxp.com>
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8
9 #include <common.h>
10 #include <asm/arch/imx-regs.h>
11 #include <asm/io.h>
12 #include <asm/arch/clock.h>
13 #include <asm/arch/sys_proto.h>
14 #include <asm/mach-imx/hab.h>
15 #include <asm/mach-imx/boot_mode.h>
16 #include <asm/mach-imx/syscounter.h>
17 #include <asm/armv8/mmu.h>
18 #include <errno.h>
19 #include <fdt_support.h>
20 #include <fsl_wdog.h>
21 #include <imx_sip.h>
22
23 DECLARE_GLOBAL_DATA_PTR;
24
25 #if defined(CONFIG_SECURE_BOOT)
26 struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
27         .bank = 1,
28         .word = 3,
29 };
30 #endif
31
32 int timer_init(void)
33 {
34 #ifdef CONFIG_SPL_BUILD
35         struct sctr_regs *sctr = (struct sctr_regs *)SYSCNT_CTRL_BASE_ADDR;
36         unsigned long freq = readl(&sctr->cntfid0);
37
38         /* Update with accurate clock frequency */
39         asm volatile("msr cntfrq_el0, %0" : : "r" (freq) : "memory");
40
41         clrsetbits_le32(&sctr->cntcr, SC_CNTCR_FREQ0 | SC_CNTCR_FREQ1,
42                         SC_CNTCR_FREQ0 | SC_CNTCR_ENABLE | SC_CNTCR_HDBG);
43 #endif
44
45         gd->arch.tbl = 0;
46         gd->arch.tbu = 0;
47
48         return 0;
49 }
50
51 void enable_tzc380(void)
52 {
53         struct iomuxc_gpr_base_regs *gpr =
54                 (struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
55
56         /* Enable TZASC and lock setting */
57         setbits_le32(&gpr->gpr[10], GPR_TZASC_EN);
58         setbits_le32(&gpr->gpr[10], GPR_TZASC_EN_LOCK);
59 }
60
61 void set_wdog_reset(struct wdog_regs *wdog)
62 {
63         /*
64          * Output WDOG_B signal to reset external pmic or POR_B decided by
65          * the board design. Without external reset, the peripherals/DDR/
66          * PMIC are not reset, that may cause system working abnormal.
67          * WDZST bit is write-once only bit. Align this bit in kernel,
68          * otherwise kernel code will have no chance to set this bit.
69          */
70         setbits_le16(&wdog->wcr, WDOG_WDT_MASK | WDOG_WDZST_MASK);
71 }
72
73 static struct mm_region imx8m_mem_map[] = {
74         {
75                 /* ROM */
76                 .virt = 0x0UL,
77                 .phys = 0x0UL,
78                 .size = 0x100000UL,
79                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
80                          PTE_BLOCK_OUTER_SHARE
81         }, {
82                 /* OCRAM */
83                 .virt = 0x900000UL,
84                 .phys = 0x900000UL,
85                 .size = 0x200000UL,
86                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
87                          PTE_BLOCK_OUTER_SHARE
88         }, {
89                 /* AIPS */
90                 .virt = 0xB00000UL,
91                 .phys = 0xB00000UL,
92                 .size = 0x3f500000UL,
93                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
94                          PTE_BLOCK_NON_SHARE |
95                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
96         }, {
97                 /* DRAM1 */
98                 .virt = 0x40000000UL,
99                 .phys = 0x40000000UL,
100                 .size = 0xC0000000UL,
101                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
102                          PTE_BLOCK_OUTER_SHARE
103         }, {
104                 /* DRAM2 */
105                 .virt = 0x100000000UL,
106                 .phys = 0x100000000UL,
107                 .size = 0x040000000UL,
108                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
109                          PTE_BLOCK_OUTER_SHARE
110         }, {
111                 /* List terminator */
112                 0,
113         }
114 };
115
116 struct mm_region *mem_map = imx8m_mem_map;
117
118 u32 get_cpu_rev(void)
119 {
120         struct anamix_pll *ana_pll = (struct anamix_pll *)ANATOP_BASE_ADDR;
121         u32 reg = readl(&ana_pll->digprog);
122         u32 type = (reg >> 16) & 0xff;
123         u32 rom_version;
124
125         reg &= 0xff;
126
127         if (reg == CHIP_REV_1_0) {
128                 /*
129                  * For B0 chip, the DIGPROG is not updated, still TO1.0.
130                  * we have to check ROM version further
131                  */
132                 rom_version = readl((void __iomem *)ROM_VERSION_A0);
133                 if (rom_version != CHIP_REV_1_0) {
134                         rom_version = readl((void __iomem *)ROM_VERSION_B0);
135                         if (rom_version >= CHIP_REV_2_0)
136                                 reg = CHIP_REV_2_0;
137                 }
138         }
139
140         return (type << 12) | reg;
141 }
142
143 static void imx_set_wdog_powerdown(bool enable)
144 {
145         struct wdog_regs *wdog1 = (struct wdog_regs *)WDOG1_BASE_ADDR;
146         struct wdog_regs *wdog2 = (struct wdog_regs *)WDOG2_BASE_ADDR;
147         struct wdog_regs *wdog3 = (struct wdog_regs *)WDOG3_BASE_ADDR;
148
149         /* Write to the PDE (Power Down Enable) bit */
150         writew(enable, &wdog1->wmcr);
151         writew(enable, &wdog2->wmcr);
152         writew(enable, &wdog3->wmcr);
153 }
154
155 int arch_cpu_init(void)
156 {
157         /*
158          * Init timer at very early state, because sscg pll setting
159          * will use it
160          */
161         timer_init();
162
163         if (IS_ENABLED(CONFIG_SPL_BUILD)) {
164                 clock_init();
165                 imx_set_wdog_powerdown(false);
166         }
167
168         return 0;
169 }
170
171 bool is_usb_boot(void)
172 {
173         return get_boot_device() == USB_BOOT;
174 }
175
176 #ifdef CONFIG_OF_SYSTEM_SETUP
177 int ft_system_setup(void *blob, bd_t *bd)
178 {
179         int i = 0;
180         int rc;
181         int nodeoff;
182
183         /* Disable the CPU idle for A0 chip since the HW does not support it */
184         if (is_soc_rev(CHIP_REV_1_0)) {
185                 static const char * const nodes_path[] = {
186                         "/cpus/cpu@0",
187                         "/cpus/cpu@1",
188                         "/cpus/cpu@2",
189                         "/cpus/cpu@3",
190                 };
191
192                 for (i = 0; i < ARRAY_SIZE(nodes_path); i++) {
193                         nodeoff = fdt_path_offset(blob, nodes_path[i]);
194                         if (nodeoff < 0)
195                                 continue; /* Not found, skip it */
196
197                         printf("Found %s node\n", nodes_path[i]);
198
199                         rc = fdt_delprop(blob, nodeoff, "cpu-idle-states");
200                         if (rc) {
201                                 printf("Unable to update property %s:%s, err=%s\n",
202                                        nodes_path[i], "status", fdt_strerror(rc));
203                                 return rc;
204                         }
205
206                         printf("Remove %s:%s\n", nodes_path[i],
207                                "cpu-idle-states");
208                 }
209         }
210
211         return 0;
212 }
213 #endif
214
215 void reset_cpu(ulong addr)
216 {
217         struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
218
219         /* Clear WDA to trigger WDOG_B immediately */
220         writew((WCR_WDE | WCR_SRS), &wdog->wcr);
221
222         while (1) {
223                 /*
224                  * spin for .5 seconds before reset
225                  */
226         }
227 }