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Patrick Delaunay05d36932019-07-05 17:20:14 +02001// 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>
Patrick Delaunayc60f3b32019-07-05 17:20:15 +020010#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
Patrick Delaunay73306a12020-02-12 19:37:44 +010026#define STM32_FDCAN_BASE 0x4400e000
27#define STM32_CRYP2_BASE 0x4c005000
28#define STM32_CRYP1_BASE 0x54001000
29#define STM32_GPU_BASE 0x59000000
30#define STM32_DSI_BASE 0x5a000000
31
Patrick Delaunayc60f3b32019-07-05 17:20:15 +020032static const u32 stm32mp1_ip_addr[] = {
33 0x5c008000, /* 00 stgenc */
34 0x54000000, /* 01 bkpsram */
35 0x5c003000, /* 02 iwdg1 */
36 0x5c000000, /* 03 usart1 */
37 0x5c001000, /* 04 spi6 */
38 0x5c002000, /* 05 i2c4 */
39 ETZPC_RESERVED, /* 06 reserved */
40 0x54003000, /* 07 rng1 */
41 0x54002000, /* 08 hash1 */
Patrick Delaunay73306a12020-02-12 19:37:44 +010042 STM32_CRYP1_BASE, /* 09 cryp1 */
Patrick Delaunayc60f3b32019-07-05 17:20:15 +020043 0x5a003000, /* 0A ddrctrl */
44 0x5a004000, /* 0B ddrphyc */
45 0x5c009000, /* 0C i2c6 */
46 ETZPC_RESERVED, /* 0D reserved */
47 ETZPC_RESERVED, /* 0E reserved */
48 ETZPC_RESERVED, /* 0F reserved */
49 0x40000000, /* 10 tim2 */
50 0x40001000, /* 11 tim3 */
51 0x40002000, /* 12 tim4 */
52 0x40003000, /* 13 tim5 */
53 0x40004000, /* 14 tim6 */
54 0x40005000, /* 15 tim7 */
55 0x40006000, /* 16 tim12 */
56 0x40007000, /* 17 tim13 */
57 0x40008000, /* 18 tim14 */
58 0x40009000, /* 19 lptim1 */
59 0x4000a000, /* 1A wwdg1 */
60 0x4000b000, /* 1B spi2 */
61 0x4000c000, /* 1C spi3 */
62 0x4000d000, /* 1D spdifrx */
63 0x4000e000, /* 1E usart2 */
64 0x4000f000, /* 1F usart3 */
65 0x40010000, /* 20 uart4 */
66 0x40011000, /* 21 uart5 */
67 0x40012000, /* 22 i2c1 */
68 0x40013000, /* 23 i2c2 */
69 0x40014000, /* 24 i2c3 */
70 0x40015000, /* 25 i2c5 */
71 0x40016000, /* 26 cec */
72 0x40017000, /* 27 dac */
73 0x40018000, /* 28 uart7 */
74 0x40019000, /* 29 uart8 */
75 ETZPC_RESERVED, /* 2A reserved */
76 ETZPC_RESERVED, /* 2B reserved */
77 0x4001c000, /* 2C mdios */
78 ETZPC_RESERVED, /* 2D reserved */
79 ETZPC_RESERVED, /* 2E reserved */
80 ETZPC_RESERVED, /* 2F reserved */
81 0x44000000, /* 30 tim1 */
82 0x44001000, /* 31 tim8 */
83 ETZPC_RESERVED, /* 32 reserved */
84 0x44003000, /* 33 usart6 */
85 0x44004000, /* 34 spi1 */
86 0x44005000, /* 35 spi4 */
87 0x44006000, /* 36 tim15 */
88 0x44007000, /* 37 tim16 */
89 0x44008000, /* 38 tim17 */
90 0x44009000, /* 39 spi5 */
91 0x4400a000, /* 3A sai1 */
92 0x4400b000, /* 3B sai2 */
93 0x4400c000, /* 3C sai3 */
94 0x4400d000, /* 3D dfsdm */
Patrick Delaunay73306a12020-02-12 19:37:44 +010095 STM32_FDCAN_BASE, /* 3E tt_fdcan */
Patrick Delaunayc60f3b32019-07-05 17:20:15 +020096 ETZPC_RESERVED, /* 3F reserved */
97 0x50021000, /* 40 lptim2 */
98 0x50022000, /* 41 lptim3 */
99 0x50023000, /* 42 lptim4 */
100 0x50024000, /* 43 lptim5 */
101 0x50027000, /* 44 sai4 */
102 0x50025000, /* 45 vrefbuf */
103 0x4c006000, /* 46 dcmi */
104 0x4c004000, /* 47 crc2 */
105 0x48003000, /* 48 adc */
106 0x4c002000, /* 49 hash2 */
107 0x4c003000, /* 4A rng2 */
Patrick Delaunay73306a12020-02-12 19:37:44 +0100108 STM32_CRYP2_BASE, /* 4B cryp2 */
Patrick Delaunayc60f3b32019-07-05 17:20:15 +0200109 ETZPC_RESERVED, /* 4C reserved */
110 ETZPC_RESERVED, /* 4D reserved */
111 ETZPC_RESERVED, /* 4E reserved */
112 ETZPC_RESERVED, /* 4F reserved */
113 ETZPC_RESERVED, /* 50 sram1 */
114 ETZPC_RESERVED, /* 51 sram2 */
115 ETZPC_RESERVED, /* 52 sram3 */
116 ETZPC_RESERVED, /* 53 sram4 */
117 ETZPC_RESERVED, /* 54 retram */
118 0x49000000, /* 55 otg */
119 0x48004000, /* 56 sdmmc3 */
120 0x48005000, /* 57 dlybsd3 */
121 0x48000000, /* 58 dma1 */
122 0x48001000, /* 59 dma2 */
123 0x48002000, /* 5A dmamux */
124 0x58002000, /* 5B fmc */
125 0x58003000, /* 5C qspi */
126 0x58004000, /* 5D dlybq */
127 0x5800a000, /* 5E eth */
128 ETZPC_RESERVED, /* 5F reserved */
129};
130
131/* fdt helper */
132static bool fdt_disable_subnode_by_address(void *fdt, int offset, u32 addr)
133{
134 int node;
Patrick Delaunay73306a12020-02-12 19:37:44 +0100135 fdt_addr_t regs;
Patrick Delaunayc60f3b32019-07-05 17:20:15 +0200136
137 for (node = fdt_first_subnode(fdt, offset);
138 node >= 0;
139 node = fdt_next_subnode(fdt, node)) {
Patrick Delaunay73306a12020-02-12 19:37:44 +0100140 regs = fdtdec_get_addr(fdt, node, "reg");
141 if (addr == regs) {
Patrick Delaunayc60f3b32019-07-05 17:20:15 +0200142 if (fdtdec_get_is_enabled(fdt, node)) {
143 fdt_status_disabled(fdt, node);
144
145 return true;
146 }
147 return false;
148 }
149 }
150
151 return false;
152}
153
Patrick Delaunay73306a12020-02-12 19:37:44 +0100154static int stm32_fdt_fixup_etzpc(void *fdt, int soc_node)
Patrick Delaunayc60f3b32019-07-05 17:20:15 +0200155{
156 const u32 *array;
157 int array_size, i;
Patrick Delaunay73306a12020-02-12 19:37:44 +0100158 int offset, shift;
Patrick Delaunayc60f3b32019-07-05 17:20:15 +0200159 u32 addr, status, decprot[ETZPC_DECPROT_NB];
160
161 array = stm32mp1_ip_addr;
162 array_size = ARRAY_SIZE(stm32mp1_ip_addr);
163
164 for (i = 0; i < ETZPC_DECPROT_NB; i++)
165 decprot[i] = readl(ETZPC_DECPROT(i));
166
Patrick Delaunayc60f3b32019-07-05 17:20:15 +0200167 for (i = 0; i < array_size; i++) {
168 offset = i / NB_PROT_PER_REG;
169 shift = (i % NB_PROT_PER_REG) * DECPROT_NB_BITS;
170 status = (decprot[offset] >> shift) & DECPROT_MASK;
171 addr = array[i];
172
173 debug("ETZPC: 0x%08x decprot %d=%d\n", addr, i, status);
174
175 if (addr == ETZPC_RESERVED ||
176 status == DECPROT_NON_SECURED)
177 continue;
178
179 if (fdt_disable_subnode_by_address(fdt, soc_node, addr))
180 printf("ETZPC: 0x%08x node disabled, decprot %d=%d\n",
181 addr, i, status);
182 }
183
184 return 0;
185}
Patrick Delaunay05d36932019-07-05 17:20:14 +0200186
Patrick Delaunay73306a12020-02-12 19:37:44 +0100187/* deactivate all the cpu except core 0 */
188static void stm32_fdt_fixup_cpu(void *blob, char *name)
189{
190 int off;
191 u32 reg;
192
193 off = fdt_path_offset(blob, "/cpus");
194 if (off < 0) {
195 printf("%s: couldn't find /cpus node\n", __func__);
196 return;
197 }
198
199 off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
200 while (off != -FDT_ERR_NOTFOUND) {
201 reg = fdtdec_get_addr(blob, off, "reg");
202 if (reg != 0) {
203 fdt_del_node(blob, off);
204 printf("FDT: cpu %d node remove for %s\n", reg, name);
205 /* after delete we can't trust the offsets anymore */
206 off = -1;
207 }
208 off = fdt_node_offset_by_prop_value(blob, off,
209 "device_type", "cpu", 4);
210 }
211}
212
213static void stm32_fdt_disable(void *fdt, int offset, u32 addr,
214 const char *string, const char *name)
215{
216 if (fdt_disable_subnode_by_address(fdt, offset, addr))
217 printf("FDT: %s@%08x node disabled for %s\n",
218 string, addr, name);
219}
220
Patrick Delaunay05d36932019-07-05 17:20:14 +0200221/*
222 * This function is called right before the kernel is booted. "blob" is the
223 * device tree that will be passed to the kernel.
224 */
225int ft_system_setup(void *blob, bd_t *bd)
226{
227 int ret = 0;
Patrick Delaunay73306a12020-02-12 19:37:44 +0100228 int soc;
229 u32 pkg, cpu;
230 char name[SOC_NAME_SIZE];
231
232 soc = fdt_path_offset(blob, "/soc");
233 if (soc < 0)
234 return soc;
Patrick Delaunay05d36932019-07-05 17:20:14 +0200235
Patrick Delaunayc60f3b32019-07-05 17:20:15 +0200236 if (CONFIG_IS_ENABLED(STM32_ETZPC)) {
Patrick Delaunay73306a12020-02-12 19:37:44 +0100237 ret = stm32_fdt_fixup_etzpc(blob, soc);
Patrick Delaunayc60f3b32019-07-05 17:20:15 +0200238 if (ret)
239 return ret;
240 }
241
Patrick Delaunay73306a12020-02-12 19:37:44 +0100242 /* MPUs Part Numbers and name*/
243 cpu = get_cpu_type();
244 get_soc_name(name);
245
246 switch (cpu) {
247 case CPU_STM32MP151Cxx:
248 case CPU_STM32MP151Axx:
249 stm32_fdt_fixup_cpu(blob, name);
250 /* after cpu delete we can't trust the soc offsets anymore */
251 soc = fdt_path_offset(blob, "/soc");
252 stm32_fdt_disable(blob, soc, STM32_FDCAN_BASE, "can", name);
253 /* fall through */
254 case CPU_STM32MP153Cxx:
255 case CPU_STM32MP153Axx:
256 stm32_fdt_disable(blob, soc, STM32_GPU_BASE, "gpu", name);
257 stm32_fdt_disable(blob, soc, STM32_DSI_BASE, "dsi", name);
258 break;
259 default:
260 break;
261 }
262
263 switch (cpu) {
264 case CPU_STM32MP157Axx:
265 case CPU_STM32MP153Axx:
266 case CPU_STM32MP151Axx:
267 stm32_fdt_disable(blob, soc, STM32_CRYP1_BASE, "cryp", name);
268 stm32_fdt_disable(blob, soc, STM32_CRYP2_BASE, "cryp", name);
269 break;
270 default:
271 break;
272 }
273
Patrick Delaunay05d36932019-07-05 17:20:14 +0200274 switch (get_cpu_package()) {
275 case PKG_AA_LBGA448:
276 pkg = STM32MP_PKG_AA;
277 break;
278 case PKG_AB_LBGA354:
279 pkg = STM32MP_PKG_AB;
280 break;
281 case PKG_AC_TFBGA361:
282 pkg = STM32MP_PKG_AC;
283 break;
284 case PKG_AD_TFBGA257:
285 pkg = STM32MP_PKG_AD;
286 break;
287 default:
288 pkg = 0;
289 break;
290 }
291 if (pkg) {
292 do_fixup_by_compat_u32(blob, "st,stm32mp157-pinctrl",
293 "st,package", pkg, false);
294 do_fixup_by_compat_u32(blob, "st,stm32mp157-z-pinctrl",
295 "st,package", pkg, false);
296 }
297
298 return ret;
299}