Merge tag 'mmc-2019-7-15' of https://gitlab.denx.de/u-boot/custodians/u-boot-mmc
[oweals/u-boot.git] / arch / arm / mach-stm32mp / fdt.c
1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
2 /*
3  * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
4  */
5
6 #include <common.h>
7 #include <fdt_support.h>
8 #include <asm/arch/sys_proto.h>
9 #include <dt-bindings/pinctrl/stm32-pinfunc.h>
10 #include <linux/io.h>
11
12 #define ETZPC_DECPROT(n)        (STM32_ETZPC_BASE + 0x10 + 4 * (n))
13 #define ETZPC_DECPROT_NB        6
14
15 #define DECPROT_MASK            0x03
16 #define NB_PROT_PER_REG         0x10
17 #define DECPROT_NB_BITS         2
18
19 #define DECPROT_SECURED         0x00
20 #define DECPROT_WRITE_SECURE    0x01
21 #define DECPROT_MCU_ISOLATION   0x02
22 #define DECPROT_NON_SECURED     0x03
23
24 #define ETZPC_RESERVED          0xffffffff
25
26 static const u32 stm32mp1_ip_addr[] = {
27         0x5c008000,     /* 00 stgenc */
28         0x54000000,     /* 01 bkpsram */
29         0x5c003000,     /* 02 iwdg1 */
30         0x5c000000,     /* 03 usart1 */
31         0x5c001000,     /* 04 spi6 */
32         0x5c002000,     /* 05 i2c4 */
33         ETZPC_RESERVED, /* 06 reserved */
34         0x54003000,     /* 07 rng1 */
35         0x54002000,     /* 08 hash1 */
36         0x54001000,     /* 09 cryp1 */
37         0x5a003000,     /* 0A ddrctrl */
38         0x5a004000,     /* 0B ddrphyc */
39         0x5c009000,     /* 0C i2c6 */
40         ETZPC_RESERVED, /* 0D reserved */
41         ETZPC_RESERVED, /* 0E reserved */
42         ETZPC_RESERVED, /* 0F reserved */
43         0x40000000,     /* 10 tim2 */
44         0x40001000,     /* 11 tim3 */
45         0x40002000,     /* 12 tim4 */
46         0x40003000,     /* 13 tim5 */
47         0x40004000,     /* 14 tim6 */
48         0x40005000,     /* 15 tim7 */
49         0x40006000,     /* 16 tim12 */
50         0x40007000,     /* 17 tim13 */
51         0x40008000,     /* 18 tim14 */
52         0x40009000,     /* 19 lptim1 */
53         0x4000a000,     /* 1A wwdg1 */
54         0x4000b000,     /* 1B spi2 */
55         0x4000c000,     /* 1C spi3 */
56         0x4000d000,     /* 1D spdifrx */
57         0x4000e000,     /* 1E usart2 */
58         0x4000f000,     /* 1F usart3 */
59         0x40010000,     /* 20 uart4 */
60         0x40011000,     /* 21 uart5 */
61         0x40012000,     /* 22 i2c1 */
62         0x40013000,     /* 23 i2c2 */
63         0x40014000,     /* 24 i2c3 */
64         0x40015000,     /* 25 i2c5 */
65         0x40016000,     /* 26 cec */
66         0x40017000,     /* 27 dac */
67         0x40018000,     /* 28 uart7 */
68         0x40019000,     /* 29 uart8 */
69         ETZPC_RESERVED, /* 2A reserved */
70         ETZPC_RESERVED, /* 2B reserved */
71         0x4001c000,     /* 2C mdios */
72         ETZPC_RESERVED, /* 2D reserved */
73         ETZPC_RESERVED, /* 2E reserved */
74         ETZPC_RESERVED, /* 2F reserved */
75         0x44000000,     /* 30 tim1 */
76         0x44001000,     /* 31 tim8 */
77         ETZPC_RESERVED, /* 32 reserved */
78         0x44003000,     /* 33 usart6 */
79         0x44004000,     /* 34 spi1 */
80         0x44005000,     /* 35 spi4 */
81         0x44006000,     /* 36 tim15 */
82         0x44007000,     /* 37 tim16 */
83         0x44008000,     /* 38 tim17 */
84         0x44009000,     /* 39 spi5 */
85         0x4400a000,     /* 3A sai1 */
86         0x4400b000,     /* 3B sai2 */
87         0x4400c000,     /* 3C sai3 */
88         0x4400d000,     /* 3D dfsdm */
89         0x4400e000,     /* 3E tt_fdcan */
90         ETZPC_RESERVED, /* 3F reserved */
91         0x50021000,     /* 40 lptim2 */
92         0x50022000,     /* 41 lptim3 */
93         0x50023000,     /* 42 lptim4 */
94         0x50024000,     /* 43 lptim5 */
95         0x50027000,     /* 44 sai4 */
96         0x50025000,     /* 45 vrefbuf */
97         0x4c006000,     /* 46 dcmi */
98         0x4c004000,     /* 47 crc2 */
99         0x48003000,     /* 48 adc */
100         0x4c002000,     /* 49 hash2 */
101         0x4c003000,     /* 4A rng2 */
102         0x4c005000,     /* 4B cryp2 */
103         ETZPC_RESERVED, /* 4C reserved */
104         ETZPC_RESERVED, /* 4D reserved */
105         ETZPC_RESERVED, /* 4E reserved */
106         ETZPC_RESERVED, /* 4F reserved */
107         ETZPC_RESERVED, /* 50 sram1 */
108         ETZPC_RESERVED, /* 51 sram2 */
109         ETZPC_RESERVED, /* 52 sram3 */
110         ETZPC_RESERVED, /* 53 sram4 */
111         ETZPC_RESERVED, /* 54 retram */
112         0x49000000,     /* 55 otg */
113         0x48004000,     /* 56 sdmmc3 */
114         0x48005000,     /* 57 dlybsd3 */
115         0x48000000,     /* 58 dma1 */
116         0x48001000,     /* 59 dma2 */
117         0x48002000,     /* 5A dmamux */
118         0x58002000,     /* 5B fmc */
119         0x58003000,     /* 5C qspi */
120         0x58004000,     /* 5D dlybq */
121         0x5800a000,     /* 5E eth */
122         ETZPC_RESERVED, /* 5F reserved */
123 };
124
125 /* fdt helper */
126 static bool fdt_disable_subnode_by_address(void *fdt, int offset, u32 addr)
127 {
128         int node;
129
130         for (node = fdt_first_subnode(fdt, offset);
131              node >= 0;
132              node = fdt_next_subnode(fdt, node)) {
133                 if (addr == (u32)fdt_getprop(fdt, node, "reg", 0)) {
134                         if (fdtdec_get_is_enabled(fdt, node)) {
135                                 fdt_status_disabled(fdt, node);
136
137                                 return true;
138                         }
139                         return false;
140                 }
141         }
142
143         return false;
144 }
145
146 static int stm32_fdt_fixup_etzpc(void *fdt)
147 {
148         const u32 *array;
149         int array_size, i;
150         int soc_node, offset, shift;
151         u32 addr, status, decprot[ETZPC_DECPROT_NB];
152
153         array = stm32mp1_ip_addr;
154         array_size = ARRAY_SIZE(stm32mp1_ip_addr);
155
156         for (i = 0; i < ETZPC_DECPROT_NB; i++)
157                 decprot[i] = readl(ETZPC_DECPROT(i));
158
159         soc_node = fdt_path_offset(fdt, "/soc");
160         if (soc_node < 0)
161                 return soc_node;
162
163         for (i = 0; i < array_size; i++) {
164                 offset = i / NB_PROT_PER_REG;
165                 shift = (i % NB_PROT_PER_REG) * DECPROT_NB_BITS;
166                 status = (decprot[offset] >> shift) & DECPROT_MASK;
167                 addr = array[i];
168
169                 debug("ETZPC: 0x%08x decprot %d=%d\n", addr, i, status);
170
171                 if (addr == ETZPC_RESERVED ||
172                     status == DECPROT_NON_SECURED)
173                         continue;
174
175                 if (fdt_disable_subnode_by_address(fdt, soc_node, addr))
176                         printf("ETZPC: 0x%08x node disabled, decprot %d=%d\n",
177                                addr, i, status);
178         }
179
180         return 0;
181 }
182
183 /*
184  * This function is called right before the kernel is booted. "blob" is the
185  * device tree that will be passed to the kernel.
186  */
187 int ft_system_setup(void *blob, bd_t *bd)
188 {
189         int ret = 0;
190         u32 pkg;
191
192         if (CONFIG_IS_ENABLED(STM32_ETZPC)) {
193                 ret = stm32_fdt_fixup_etzpc(blob);
194                 if (ret)
195                         return ret;
196         }
197
198         switch (get_cpu_package()) {
199         case PKG_AA_LBGA448:
200                 pkg = STM32MP_PKG_AA;
201                 break;
202         case PKG_AB_LBGA354:
203                 pkg = STM32MP_PKG_AB;
204                 break;
205         case PKG_AC_TFBGA361:
206                 pkg = STM32MP_PKG_AC;
207                 break;
208         case PKG_AD_TFBGA257:
209                 pkg = STM32MP_PKG_AD;
210                 break;
211         default:
212                 pkg = 0;
213                 break;
214         }
215         if (pkg) {
216                 do_fixup_by_compat_u32(blob, "st,stm32mp157-pinctrl",
217                                        "st,package", pkg, false);
218                 do_fixup_by_compat_u32(blob, "st,stm32mp157-z-pinctrl",
219                                        "st,package", pkg, false);
220         }
221
222         return ret;
223 }