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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright 2011 Linaro Limited
4  * Aneesh V <aneesh@ti.com>
5  */
6 #include <common.h>
7 #include <environment.h>
8 #include <asm/setup.h>
9 #include <asm/arch/sys_proto.h>
10 #include <asm/omap_common.h>
11 
do_cancel_out(u32 * num,u32 * den,u32 factor)12 static void do_cancel_out(u32 *num, u32 *den, u32 factor)
13 {
14 	while (1) {
15 		if (((*num)/factor*factor == (*num)) &&
16 		   ((*den)/factor*factor == (*den))) {
17 			(*num) /= factor;
18 			(*den) /= factor;
19 		} else
20 			break;
21 	}
22 }
23 
24 #ifdef CONFIG_FASTBOOT_FLASH
omap_set_fastboot_cpu(void)25 static void omap_set_fastboot_cpu(void)
26 {
27 	char *cpu;
28 	u32 cpu_rev = omap_revision();
29 
30 	switch (cpu_rev) {
31 	case DRA762_ES1_0:
32 	case DRA762_ABZ_ES1_0:
33 	case DRA762_ACD_ES1_0:
34 		cpu = "DRA762";
35 		break;
36 	case DRA752_ES1_0:
37 	case DRA752_ES1_1:
38 	case DRA752_ES2_0:
39 		cpu = "DRA752";
40 		break;
41 	case DRA722_ES1_0:
42 	case DRA722_ES2_0:
43 	case DRA722_ES2_1:
44 		cpu = "DRA722";
45 		break;
46 	default:
47 		cpu = NULL;
48 		printf("Warning: fastboot.cpu: unknown CPU rev: %u\n", cpu_rev);
49 	}
50 
51 	env_set("fastboot.cpu", cpu);
52 }
53 
omap_set_fastboot_secure(void)54 static void omap_set_fastboot_secure(void)
55 {
56 	const char *secure;
57 	u32 dev = get_device_type();
58 
59 	switch (dev) {
60 	case EMU_DEVICE:
61 		secure = "EMU";
62 		break;
63 	case HS_DEVICE:
64 		secure = "HS";
65 		break;
66 	case GP_DEVICE:
67 		secure = "GP";
68 		break;
69 	default:
70 		secure = NULL;
71 		printf("Warning: fastboot.secure: unknown CPU sec: %u\n", dev);
72 	}
73 
74 	env_set("fastboot.secure", secure);
75 }
76 
omap_set_fastboot_board_rev(void)77 static void omap_set_fastboot_board_rev(void)
78 {
79 	const char *board_rev;
80 
81 	board_rev = env_get("board_rev");
82 	if (board_rev == NULL)
83 		printf("Warning: fastboot.board_rev: unknown board revision\n");
84 
85 	env_set("fastboot.board_rev", board_rev);
86 }
87 
88 #ifdef CONFIG_FASTBOOT_FLASH_MMC
omap_mmc_get_part_size(const char * part)89 static u32 omap_mmc_get_part_size(const char *part)
90 {
91 	int res;
92 	struct blk_desc *dev_desc;
93 	disk_partition_t info;
94 	u64 sz = 0;
95 
96 	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
97 	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
98 		pr_err("invalid mmc device\n");
99 		return 0;
100 	}
101 
102 	/* Check only for EFI (GPT) partition table */
103 	res = part_get_info_by_name_type(dev_desc, part, &info, PART_TYPE_EFI);
104 	if (res < 0)
105 		return 0;
106 
107 	/* Calculate size in bytes */
108 	sz = (info.size * (u64)info.blksz);
109 	/* to KiB */
110 	sz >>= 10;
111 
112 	return (u32)sz;
113 }
114 
omap_set_fastboot_userdata_size(void)115 static void omap_set_fastboot_userdata_size(void)
116 {
117 	char buf[16];
118 	u32 sz_kb;
119 
120 	sz_kb = omap_mmc_get_part_size("userdata");
121 	if (sz_kb == 0)
122 		return; /* probably it's not Android partition table */
123 
124 	sprintf(buf, "%u", sz_kb);
125 	env_set("fastboot.userdata_size", buf);
126 }
127 #else
omap_set_fastboot_userdata_size(void)128 static inline void omap_set_fastboot_userdata_size(void)
129 {
130 }
131 #endif /* CONFIG_FASTBOOT_FLASH_MMC */
omap_set_fastboot_vars(void)132 void omap_set_fastboot_vars(void)
133 {
134 	omap_set_fastboot_cpu();
135 	omap_set_fastboot_secure();
136 	omap_set_fastboot_board_rev();
137 	omap_set_fastboot_userdata_size();
138 }
139 #endif /* CONFIG_FASTBOOT_FLASH */
140 
141 /*
142  * Cancel out the denominator and numerator of a fraction
143  * to get smaller numerator and denominator.
144  */
cancel_out(u32 * num,u32 * den,u32 den_limit)145 void cancel_out(u32 *num, u32 *den, u32 den_limit)
146 {
147 	do_cancel_out(num, den, 2);
148 	do_cancel_out(num, den, 3);
149 	do_cancel_out(num, den, 5);
150 	do_cancel_out(num, den, 7);
151 	do_cancel_out(num, den, 11);
152 	do_cancel_out(num, den, 13);
153 	do_cancel_out(num, den, 17);
154 	while ((*den) > den_limit) {
155 		*num /= 2;
156 		/*
157 		 * Round up the denominator so that the final fraction
158 		 * (num/den) is always <= the desired value
159 		 */
160 		*den = (*den + 1) / 2;
161 	}
162 }
163 
omap_die_id(unsigned int * die_id)164 __weak void omap_die_id(unsigned int *die_id)
165 {
166 	die_id[0] = die_id[1] = die_id[2] = die_id[3] = 0;
167 }
168 
omap_die_id_serial(void)169 void omap_die_id_serial(void)
170 {
171 	unsigned int die_id[4] = { 0 };
172 	char serial_string[17] = { 0 };
173 
174 	omap_die_id((unsigned int *)&die_id);
175 
176 	if (!env_get("serial#")) {
177 		snprintf(serial_string, sizeof(serial_string),
178 			"%08x%08x", die_id[0], die_id[3]);
179 
180 		env_set("serial#", serial_string);
181 	}
182 }
183 
omap_die_id_get_board_serial(struct tag_serialnr * serialnr)184 void omap_die_id_get_board_serial(struct tag_serialnr *serialnr)
185 {
186 	char *serial_string;
187 	unsigned long long serial;
188 
189 	serial_string = env_get("serial#");
190 
191 	if (serial_string) {
192 		serial = simple_strtoull(serial_string, NULL, 16);
193 
194 		serialnr->high = (unsigned int) (serial >> 32);
195 		serialnr->low = (unsigned int) (serial & 0xffffffff);
196 	} else {
197 		serialnr->high = 0;
198 		serialnr->low = 0;
199 	}
200 }
201 
omap_die_id_usbethaddr(void)202 void omap_die_id_usbethaddr(void)
203 {
204 	unsigned int die_id[4] = { 0 };
205 	unsigned char mac[6] = { 0 };
206 
207 	omap_die_id((unsigned int *)&die_id);
208 
209 	if (!env_get("usbethaddr")) {
210 		/*
211 		 * Create a fake MAC address from the processor ID code.
212 		 * First byte is 0x02 to signify locally administered.
213 		 */
214 		mac[0] = 0x02;
215 		mac[1] = die_id[3] & 0xff;
216 		mac[2] = die_id[2] & 0xff;
217 		mac[3] = die_id[1] & 0xff;
218 		mac[4] = die_id[0] & 0xff;
219 		mac[5] = (die_id[0] >> 8) & 0xff;
220 
221 		eth_env_set_enetaddr("usbethaddr", mac);
222 
223 		if (!env_get("ethaddr"))
224 			eth_env_set_enetaddr("ethaddr", mac);
225 	}
226 }
227 
omap_die_id_display(void)228 void omap_die_id_display(void)
229 {
230 	unsigned int die_id[4] = { 0 };
231 
232 	omap_die_id(die_id);
233 
234 	printf("OMAP die ID: %08x%08x%08x%08x\n", die_id[3], die_id[2],
235 		die_id[1], die_id[0]);
236 }
237