xref: /openbmc/u-boot/board/atmel/common/board.c (revision cf033e04)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2017 Microchip
4  *		      Wenyou Yang <wenyou.yang@microchip.com>
5  */
6 
7 #include <common.h>
8 #include <w1.h>
9 #include <w1-eeprom.h>
10 #include <dm/device-internal.h>
11 
12 #define AT91_PDA_EEPROM_ID_OFFSET		15
13 #define AT91_PDA_EEPROM_ID_LENGTH		5
14 #define AT91_PDA_EEPROM_DEFAULT_BUS		0
15 
16 char *get_cpu_name(void);
17 
dummy(void)18 void dummy(void)
19 {
20 }
21 
22 #if defined CONFIG_W1
at91_pda_detect(void)23 void at91_pda_detect(void)
24 {
25 	struct udevice *bus, *dev;
26 	u8 buf[AT91_PDA_EEPROM_ID_LENGTH + 1] = {0};
27 	int ret;
28 	int pda = 0;
29 
30 	ret = w1_get_bus(AT91_PDA_EEPROM_DEFAULT_BUS, &bus);
31 	if (ret)
32 		return;
33 
34 	for (device_find_first_child(bus, &dev);
35 	     dev;
36 	     device_find_next_child(&dev)) {
37 		ret = device_probe(dev);
38 		if (ret) {
39 			continue;
40 		} else {
41 			ret = w1_eeprom_read_buf(dev, AT91_PDA_EEPROM_ID_OFFSET,
42 						 (u8 *)buf, AT91_PDA_EEPROM_ID_LENGTH);
43 			if (ret)
44 				return;
45 			break;
46 		}
47 	}
48 	pda = simple_strtoul((const char *)buf, NULL, 10);
49 
50 	switch (pda) {
51 	case 7000:
52 		if (buf[4] == 'B')
53 			printf("PDA TM7000B detected\n");
54 		else
55 			printf("PDA TM7000 detected\n");
56 		break;
57 	case 4300:
58 		printf("PDA TM4300 detected\n");
59 		break;
60 	case 5000:
61 		printf("PDA TM5000 detected\n");
62 		break;
63 	}
64 	env_set("pda", (const char *)buf);
65 }
66 #else
at91_pda_detect(void)67 void at91_pda_detect(void)
68 {
69 }
70 #endif
71 
at91_prepare_cpu_var(void)72 void at91_prepare_cpu_var(void)
73 {
74 	env_set("cpu", get_cpu_name());
75 }
76