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 <env.h>
8#include <part.h>
9#include <asm/setup.h>
10#include <asm/arch/sys_proto.h>
11#include <asm/omap_common.h>
12#include <linux/printk.h>
13
14static void do_cancel_out(u32 *num, u32 *den, u32 factor)
15{
16	while (1) {
17		if (((*num)/factor*factor == (*num)) &&
18		   ((*den)/factor*factor == (*den))) {
19			(*num) /= factor;
20			(*den) /= factor;
21		} else
22			break;
23	}
24}
25
26#ifdef CONFIG_FASTBOOT_FLASH
27static void omap_set_fastboot_cpu(void)
28{
29	char *cpu;
30	u32 cpu_rev = omap_revision();
31
32	switch (cpu_rev) {
33	case DRA762_ES1_0:
34	case DRA762_ABZ_ES1_0:
35	case DRA762_ACD_ES1_0:
36		cpu = "DRA762";
37		break;
38	case DRA752_ES1_0:
39	case DRA752_ES1_1:
40	case DRA752_ES2_0:
41		cpu = "DRA752";
42		break;
43	case DRA722_ES1_0:
44	case DRA722_ES2_0:
45	case DRA722_ES2_1:
46		cpu = "DRA722";
47		break;
48	default:
49		cpu = NULL;
50		printf("Warning: fastboot.cpu: unknown CPU rev: %u\n", cpu_rev);
51	}
52
53	env_set("fastboot.cpu", cpu);
54}
55
56static void omap_set_fastboot_secure(void)
57{
58	const char *secure;
59	u32 dev = get_device_type();
60
61	switch (dev) {
62	case EMU_DEVICE:
63		secure = "EMU";
64		break;
65	case HS_DEVICE:
66		secure = "HS";
67		break;
68	case GP_DEVICE:
69		secure = "GP";
70		break;
71	default:
72		secure = NULL;
73		printf("Warning: fastboot.secure: unknown CPU sec: %u\n", dev);
74	}
75
76	env_set("fastboot.secure", secure);
77}
78
79static void omap_set_fastboot_board_rev(void)
80{
81	const char *board_rev;
82
83	board_rev = env_get("board_rev");
84	if (board_rev == NULL)
85		printf("Warning: fastboot.board_rev: unknown board revision\n");
86
87	env_set("fastboot.board_rev", board_rev);
88}
89
90#ifdef CONFIG_FASTBOOT_FLASH_MMC
91static u32 omap_mmc_get_part_size(const char *part)
92{
93	int res;
94	struct blk_desc *dev_desc;
95	struct disk_partition info;
96	u64 sz = 0;
97
98	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
99	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
100		pr_err("invalid mmc device\n");
101		return 0;
102	}
103
104	res = part_get_info_by_name(dev_desc, part, &info);
105	if (res < 0)
106		return 0;
107
108	/* Calculate size in bytes */
109	sz = (info.size * (u64)info.blksz);
110	/* to KiB */
111	sz >>= 10;
112
113	return (u32)sz;
114}
115
116static void omap_set_fastboot_userdata_size(void)
117{
118	char buf[16];
119	u32 sz_kb;
120
121	sz_kb = omap_mmc_get_part_size("userdata");
122	if (sz_kb == 0)
123		return; /* probably it's not Android partition table */
124
125	sprintf(buf, "%u", sz_kb);
126	env_set("fastboot.userdata_size", buf);
127}
128#else
129static inline void omap_set_fastboot_userdata_size(void)
130{
131}
132#endif /* CONFIG_FASTBOOT_FLASH_MMC */
133
134static void omap_set_fastboot_product(void)
135{
136	const char *board_name;
137
138	board_name = env_get("board_name");
139	if (board_name == NULL)
140		printf("Warning: fastboot.product: unknown board\n");
141
142	env_set("fastboot.product", board_name);
143}
144
145void omap_set_fastboot_vars(void)
146{
147	omap_set_fastboot_cpu();
148	omap_set_fastboot_secure();
149	omap_set_fastboot_board_rev();
150	omap_set_fastboot_userdata_size();
151	omap_set_fastboot_product();
152}
153#endif /* CONFIG_FASTBOOT_FLASH */
154
155/*
156 * Cancel out the denominator and numerator of a fraction
157 * to get smaller numerator and denominator.
158 */
159void cancel_out(u32 *num, u32 *den, u32 den_limit)
160{
161	do_cancel_out(num, den, 2);
162	do_cancel_out(num, den, 3);
163	do_cancel_out(num, den, 5);
164	do_cancel_out(num, den, 7);
165	do_cancel_out(num, den, 11);
166	do_cancel_out(num, den, 13);
167	do_cancel_out(num, den, 17);
168	while ((*den) > den_limit) {
169		*num /= 2;
170		/*
171		 * Round up the denominator so that the final fraction
172		 * (num/den) is always <= the desired value
173		 */
174		*den = (*den + 1) / 2;
175	}
176}
177
178__weak void omap_die_id(unsigned int *die_id)
179{
180	die_id[0] = die_id[1] = die_id[2] = die_id[3] = 0;
181}
182
183void omap_die_id_serial(void)
184{
185	unsigned int die_id[4] = { 0 };
186	char serial_string[17] = { 0 };
187
188	omap_die_id((unsigned int *)&die_id);
189
190	if (!env_get("serial#")) {
191		snprintf(serial_string, sizeof(serial_string),
192			"%08x%08x", die_id[0], die_id[3]);
193
194		env_set("serial#", serial_string);
195	}
196}
197
198void omap_die_id_get_board_serial(struct tag_serialnr *serialnr)
199{
200	char *serial_string;
201	unsigned long long serial;
202
203	serial_string = env_get("serial#");
204
205	if (serial_string) {
206		serial = simple_strtoull(serial_string, NULL, 16);
207
208		serialnr->high = (unsigned int) (serial >> 32);
209		serialnr->low = (unsigned int) (serial & 0xffffffff);
210	} else {
211		serialnr->high = 0;
212		serialnr->low = 0;
213	}
214}
215
216void omap_die_id_usbethaddr(void)
217{
218	unsigned int die_id[4] = { 0 };
219	unsigned char mac[6] = { 0 };
220
221	omap_die_id((unsigned int *)&die_id);
222
223	if (!env_get("usbethaddr")) {
224		/*
225		 * Create a fake MAC address from the processor ID code.
226		 * First byte is 0x02 to signify locally administered.
227		 */
228		mac[0] = 0x02;
229		mac[1] = die_id[3] & 0xff;
230		mac[2] = die_id[2] & 0xff;
231		mac[3] = die_id[1] & 0xff;
232		mac[4] = die_id[0] & 0xff;
233		mac[5] = (die_id[0] >> 8) & 0xff;
234
235		eth_env_set_enetaddr("usbethaddr", mac);
236
237		if (!env_get("ethaddr"))
238			eth_env_set_enetaddr("ethaddr", mac);
239	}
240}
241
242void omap_die_id_display(void)
243{
244	unsigned int die_id[4] = { 0 };
245
246	omap_die_id(die_id);
247
248	printf("OMAP die ID: %08x%08x%08x%08x\n", die_id[3], die_id[2],
249		die_id[1], die_id[0]);
250}
251