Merge tag 'dm-pull-6feb20' of https://gitlab.denx.de/u-boot/custodians/u-boot-dm
[oweals/u-boot.git] / board / cortina / presidio-asic / presidio.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2020 - Cortina Access Inc.
4  *
5  */
6 #include <common.h>
7 #include <malloc.h>
8 #include <errno.h>
9 #include <netdev.h>
10 #include <asm/io.h>
11 #include <linux/compiler.h>
12 #include <configs/presidio_asic.h>
13 #include <linux/psci.h>
14 #include <asm/psci.h>
15 #include <cpu_func.h>
16 #include <asm/armv8/mmu.h>
17
18 DECLARE_GLOBAL_DATA_PTR;
19
20 #define CA_PERIPH_BASE                  0xE0000000UL
21 #define CA_PERIPH_SIZE                  0x20000000UL
22 #define CA_GLOBAL_BASE                  0xf4320000
23 #define CA_GLOBAL_JTAG_ID               0xf4320000
24 #define CA_GLOBAL_BLOCK_RESET           0xf4320004
25 #define CA_GLOBAL_BLOCK_RESET_RESET_DMA BIT(16)
26 #define CA_DMA_SEC_SSP_BAUDRATE_CTRL    0xf7001b94
27 #define CA_DMA_SEC_SSP_ID               0xf7001b80
28
29 int print_cpuinfo(void)
30 {
31         printf("CPU:   Cortina Presidio G3\n");
32         return 0;
33 }
34
35 static struct mm_region presidio_mem_map[] = {
36         {
37         .virt = DDR_BASE,
38         .phys = DDR_BASE,
39         .size = PHYS_SDRAM_1_SIZE,
40         .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
41                  PTE_BLOCK_OUTER_SHARE
42         },
43         {
44         .virt = CA_PERIPH_BASE,
45         .phys = CA_PERIPH_BASE,
46         .size = CA_PERIPH_SIZE,
47         .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
48                  PTE_BLOCK_NON_SHARE
49         },
50         {
51         /* List terminator */
52         0,
53         }
54 };
55
56 struct mm_region *mem_map = presidio_mem_map;
57
58 static noinline int invoke_psci_fn_smc(u64 function_id, u64 arg0, u64 arg1,
59                                        u64 arg2)
60 {
61         asm volatile("mov x0, %0\n"
62                     "mov x1, %1\n"
63                     "mov x2, %2\n"
64                     "mov x3, %3\n"
65                     "smc        #0\n"
66                     : "+r" (function_id)
67                     : "r" (arg0), "r" (arg1), "r" (arg2)
68                     );
69
70         return function_id;
71 }
72
73 int board_early_init_r(void)
74 {
75         dcache_disable();
76         return 0;
77 }
78
79 int board_init(void)
80 {
81         unsigned int reg_data, jtag_id;
82
83         /* Enable timer */
84         writel(1, CONFIG_SYS_TIMER_BASE);
85
86         /* Enable snoop in CCI400 slave port#4 */
87         writel(3, 0xF5595000);
88
89         jtag_id = readl(CA_GLOBAL_JTAG_ID);
90
91         /* If this is HGU variant then do not use
92          * the Saturn daughter card ref. clk
93          */
94         if (jtag_id == 0x1010D8F3) {
95                 reg_data = readl(0xF3100064);
96                 /* change multifunc. REF CLK pin to
97                  * a simple GPIO pin
98                  */
99                 reg_data |= (1 << 1);
100                 writel(reg_data, 0xf3100064);
101         }
102
103         return 0;
104 }
105
106 int dram_init(void)
107 {
108         unsigned int ddr_size;
109
110         ddr_size = readl(0x111100c);
111         gd->ram_size = ddr_size * 0x100000;
112         return 0;
113 }
114
115 void reset_cpu(ulong addr)
116 {
117         invoke_psci_fn_smc(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0);
118 }
119
120 #ifdef CONFIG_LAST_STAGE_INIT
121 int last_stage_init(void)
122 {
123         u32 val;
124
125         val = readl(CA_GLOBAL_BLOCK_RESET);
126         val &= ~CA_GLOBAL_BLOCK_RESET_RESET_DMA;
127         writel(val, CA_GLOBAL_BLOCK_RESET);
128
129         /* reduce output pclk ~3.7Hz to save power consumption */
130         writel(0x000000FF, CA_DMA_SEC_SSP_BAUDRATE_CTRL);
131
132         return 0;
133 }
134 #endif