1 /*
2  * Copyright 2016 NXP Semiconductor, Inc.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 #include <common.h>
7 #include <malloc.h>
8 #include <config.h>
9 #include <errno.h>
10 #include <asm/system.h>
11 #include <asm/types.h>
12 #include <asm/arch/soc.h>
13 #ifdef CONFIG_FSL_LSCH3
14 #include <asm/arch/immap_lsch3.h>
15 #elif defined(CONFIG_FSL_LSCH2)
16 #include <asm/arch/immap_lsch2.h>
17 #endif
18 #ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
19 #include <asm/armv8/sec_firmware.h>
20 #endif
21 #ifdef CONFIG_CHAIN_OF_TRUST
22 #include <fsl_validate.h>
23 #endif
24 
25 #ifdef CONFIG_SYS_LS_PPA_FW_IN_NAND
26 #include <nand.h>
27 #elif defined(CONFIG_SYS_LS_PPA_FW_IN_MMC)
28 #include <mmc.h>
29 #endif
30 
31 DECLARE_GLOBAL_DATA_PTR;
32 
33 int ppa_init(void)
34 {
35 	unsigned int el = current_el();
36 	void *ppa_fit_addr;
37 	u32 *boot_loc_ptr_l, *boot_loc_ptr_h;
38 	int ret;
39 
40 #ifdef CONFIG_CHAIN_OF_TRUST
41 	uintptr_t ppa_esbc_hdr = 0;
42 	uintptr_t ppa_img_addr = 0;
43 #if defined(CONFIG_SYS_LS_PPA_FW_IN_MMC) || \
44 	defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
45 	void *ppa_hdr_ddr;
46 #endif
47 #endif
48 
49 	/* Skip if running at lower exception level */
50 	if (el < 3) {
51 		debug("Skipping PPA init, running at EL%d\n", el);
52 		return 0;
53 	}
54 
55 #ifdef CONFIG_SYS_LS_PPA_FW_IN_XIP
56 	ppa_fit_addr = (void *)CONFIG_SYS_LS_PPA_FW_ADDR;
57 	debug("%s: PPA image load from XIP\n", __func__);
58 #ifdef CONFIG_CHAIN_OF_TRUST
59 	ppa_esbc_hdr = CONFIG_SYS_LS_PPA_ESBC_ADDR;
60 #endif
61 #else /* !CONFIG_SYS_LS_PPA_FW_IN_XIP */
62 	size_t fw_length, fdt_header_len = sizeof(struct fdt_header);
63 
64 	/* Copy PPA image from MMC/SD/NAND to allocated memory */
65 #ifdef CONFIG_SYS_LS_PPA_FW_IN_MMC
66 	struct mmc *mmc;
67 	int dev = CONFIG_SYS_MMC_ENV_DEV;
68 	struct fdt_header *fitp;
69 	u32 cnt;
70 	u32 blk;
71 
72 	debug("%s: PPA image load from eMMC/SD\n", __func__);
73 
74 	ret = mmc_initialize(gd->bd);
75 	if (ret) {
76 		printf("%s: mmc_initialize() failed\n", __func__);
77 		return ret;
78 	}
79 	mmc = find_mmc_device(dev);
80 	if (!mmc) {
81 		printf("PPA: MMC cannot find device for PPA firmware\n");
82 		return -ENODEV;
83 	}
84 
85 	ret = mmc_init(mmc);
86 	if (ret) {
87 		printf("%s: mmc_init() failed\n", __func__);
88 		return ret;
89 	}
90 
91 	fitp = malloc(roundup(fdt_header_len, 512));
92 	if (!fitp) {
93 		printf("PPA: malloc failed for FIT header(size 0x%zx)\n",
94 		       roundup(fdt_header_len, 512));
95 		return -ENOMEM;
96 	}
97 
98 	blk = CONFIG_SYS_LS_PPA_FW_ADDR / 512;
99 	cnt = DIV_ROUND_UP(fdt_header_len, 512);
100 	debug("%s: MMC read PPA FIT header: dev # %u, block # %u, count %u\n",
101 	      __func__, dev, blk, cnt);
102 	ret = mmc->block_dev.block_read(&mmc->block_dev, blk, cnt, fitp);
103 	if (ret != cnt) {
104 		free(fitp);
105 		printf("MMC/SD read of PPA FIT header at offset 0x%x failed\n",
106 		       CONFIG_SYS_LS_PPA_FW_ADDR);
107 		return -EIO;
108 	}
109 
110 	/* flush cache after read */
111 	flush_cache((ulong)fitp, cnt * 512);
112 
113 	ret = fdt_check_header(fitp);
114 	if (ret) {
115 		free(fitp);
116 		printf("%s: fdt_check_header() failed\n", __func__);
117 		return ret;
118 	}
119 
120 #ifdef CONFIG_CHAIN_OF_TRUST
121 	ppa_hdr_ddr = malloc(CONFIG_LS_PPA_ESBC_HDR_SIZE);
122 	if (!ppa_hdr_ddr) {
123 		printf("PPA: malloc failed for PPA header\n");
124 		return -ENOMEM;
125 	}
126 
127 	blk = CONFIG_SYS_LS_PPA_ESBC_ADDR >> 9;
128 	cnt = DIV_ROUND_UP(CONFIG_LS_PPA_ESBC_HDR_SIZE, 512);
129 	ret = mmc->block_dev.block_read(&mmc->block_dev, blk, cnt, ppa_hdr_ddr);
130 	if (ret != cnt) {
131 		free(ppa_hdr_ddr);
132 		printf("MMC/SD read of PPA header failed\n");
133 		return -EIO;
134 	}
135 	debug("Read PPA header to 0x%p\n", ppa_hdr_ddr);
136 
137 	/* flush cache after read */
138 	flush_cache((ulong)ppa_hdr_ddr, cnt * 512);
139 
140 	ppa_esbc_hdr = (uintptr_t)ppa_hdr_ddr;
141 #endif
142 
143 	fw_length = fdt_totalsize(fitp);
144 	free(fitp);
145 
146 	fw_length = roundup(fw_length, 512);
147 	ppa_fit_addr = malloc(fw_length);
148 	if (!ppa_fit_addr) {
149 		printf("PPA: malloc failed for PPA image(size 0x%zx)\n",
150 		       fw_length);
151 		return -ENOMEM;
152 	}
153 
154 	blk = CONFIG_SYS_LS_PPA_FW_ADDR / 512;
155 	cnt = DIV_ROUND_UP(fw_length, 512);
156 	debug("%s: MMC read PPA FIT image: dev # %u, block # %u, count %u\n",
157 	      __func__, dev, blk, cnt);
158 	ret = mmc->block_dev.block_read(&mmc->block_dev,
159 					blk, cnt, ppa_fit_addr);
160 	if (ret != cnt) {
161 		free(ppa_fit_addr);
162 		printf("MMC/SD read of PPA FIT header at offset 0x%x failed\n",
163 		       CONFIG_SYS_LS_PPA_FW_ADDR);
164 		return -EIO;
165 	}
166 
167 	/* flush cache after read */
168 	flush_cache((ulong)ppa_fit_addr, cnt * 512);
169 
170 #elif defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
171 	struct fdt_header fit;
172 
173 	debug("%s: PPA image load from NAND\n", __func__);
174 
175 	nand_init();
176 	ret = nand_read(nand_info[0], (loff_t)CONFIG_SYS_LS_PPA_FW_ADDR,
177 		       &fdt_header_len, (u_char *)&fit);
178 	if (ret == -EUCLEAN) {
179 		printf("NAND read of PPA FIT header at offset 0x%x failed\n",
180 		       CONFIG_SYS_LS_PPA_FW_ADDR);
181 		return -EIO;
182 	}
183 
184 	ret = fdt_check_header(&fit);
185 	if (ret) {
186 		printf("%s: fdt_check_header() failed\n", __func__);
187 		return ret;
188 	}
189 
190 #ifdef CONFIG_CHAIN_OF_TRUST
191 	ppa_hdr_ddr = malloc(CONFIG_LS_PPA_ESBC_HDR_SIZE);
192 	if (!ppa_hdr_ddr) {
193 		printf("PPA: malloc failed for PPA header\n");
194 		return -ENOMEM;
195 	}
196 
197 	fw_length = CONFIG_LS_PPA_ESBC_HDR_SIZE;
198 
199 	ret = nand_read(nand_info[0], (loff_t)CONFIG_SYS_LS_PPA_ESBC_ADDR,
200 		       &fw_length, (u_char *)ppa_hdr_ddr);
201 	if (ret == -EUCLEAN) {
202 		free(ppa_hdr_ddr);
203 		printf("NAND read of PPA firmware at offset 0x%x failed\n",
204 		       CONFIG_SYS_LS_PPA_FW_ADDR);
205 		return -EIO;
206 	}
207 	debug("Read PPA header to 0x%p\n", ppa_hdr_ddr);
208 
209 	/* flush cache after read */
210 	flush_cache((ulong)ppa_hdr_ddr, fw_length);
211 
212 	ppa_esbc_hdr = (uintptr_t)ppa_hdr_ddr;
213 #endif
214 
215 	fw_length = fdt_totalsize(&fit);
216 
217 	ppa_fit_addr = malloc(fw_length);
218 	if (!ppa_fit_addr) {
219 		printf("PPA: malloc failed for PPA image(size 0x%zx)\n",
220 		       fw_length);
221 		return -ENOMEM;
222 	}
223 
224 	ret = nand_read(nand_info[0], (loff_t)CONFIG_SYS_LS_PPA_FW_ADDR,
225 		       &fw_length, (u_char *)ppa_fit_addr);
226 	if (ret == -EUCLEAN) {
227 		free(ppa_fit_addr);
228 		printf("NAND read of PPA firmware at offset 0x%x failed\n",
229 		       CONFIG_SYS_LS_PPA_FW_ADDR);
230 		return -EIO;
231 	}
232 
233 	/* flush cache after read */
234 	flush_cache((ulong)ppa_fit_addr, fw_length);
235 #else
236 #error "No CONFIG_SYS_LS_PPA_FW_IN_xxx defined"
237 #endif
238 
239 #endif
240 
241 #ifdef CONFIG_CHAIN_OF_TRUST
242 	ppa_img_addr = (uintptr_t)ppa_fit_addr;
243 	if (fsl_check_boot_mode_secure() != 0) {
244 		/*
245 		 * In case of failure in validation, fsl_secboot_validate
246 		 * would not return back in case of Production environment
247 		 * with ITS=1. In Development environment (ITS=0 and
248 		 * SB_EN=1), the function may return back in case of
249 		 * non-fatal failures.
250 		 */
251 		ret = fsl_secboot_validate(ppa_esbc_hdr,
252 					   PPA_KEY_HASH,
253 					   &ppa_img_addr);
254 		if (ret != 0)
255 			printf("PPA validation failed\n");
256 		else
257 			printf("PPA validation Successful\n");
258 	}
259 #if defined(CONFIG_SYS_LS_PPA_FW_IN_MMC) || \
260 	defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
261 	free(ppa_hdr_ddr);
262 #endif
263 #endif
264 
265 #ifdef CONFIG_FSL_LSCH3
266 	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
267 	boot_loc_ptr_l = &gur->bootlocptrl;
268 	boot_loc_ptr_h = &gur->bootlocptrh;
269 #elif defined(CONFIG_FSL_LSCH2)
270 	struct ccsr_scfg __iomem *scfg = (void *)(CONFIG_SYS_FSL_SCFG_ADDR);
271 	boot_loc_ptr_l = &scfg->scratchrw[1];
272 	boot_loc_ptr_h = &scfg->scratchrw[0];
273 #endif
274 
275 	debug("fsl-ppa: boot_loc_ptr_l = 0x%p, boot_loc_ptr_h =0x%p\n",
276 	      boot_loc_ptr_l, boot_loc_ptr_h);
277 	ret = sec_firmware_init(ppa_fit_addr, boot_loc_ptr_l, boot_loc_ptr_h);
278 
279 #if defined(CONFIG_SYS_LS_PPA_FW_IN_MMC) || \
280 	defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
281 	free(ppa_fit_addr);
282 #endif
283 
284 	return ret;
285 }
286