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 <dm.h>
9#include <env.h>
10#include <w1.h>
11#include <w1-eeprom.h>
12#include <dm/device-internal.h>
13
14#define AT91_PDA_EEPROM_ID_OFFSET		15
15#define AT91_PDA_EEPROM_ID_LENGTH		5
16#define AT91_PDA_EEPROM_DEFAULT_BUS		0
17
18char *get_cpu_name(void);
19
20void dummy(void)
21{
22}
23
24#if defined CONFIG_W1
25void at91_pda_detect(void)
26{
27	struct udevice *bus, *dev;
28	u8 buf[AT91_PDA_EEPROM_ID_LENGTH + 1] = {0};
29	int ret;
30	int pda = 0;
31
32	ret = w1_get_bus(AT91_PDA_EEPROM_DEFAULT_BUS, &bus);
33	if (ret)
34		goto pda_detect_err;
35
36	for (device_find_first_child(bus, &dev);
37	     dev;
38	     device_find_next_child(&dev)) {
39		ret = device_probe(dev);
40		if (ret) {
41			continue;
42		} else {
43			ret = w1_eeprom_read_buf(dev, AT91_PDA_EEPROM_ID_OFFSET,
44						 (u8 *)buf, AT91_PDA_EEPROM_ID_LENGTH);
45			if (ret)
46				goto pda_detect_err;
47			break;
48		}
49	}
50	pda = dectoul((const char *)buf, NULL);
51
52	switch (pda) {
53	case 7000:
54		if (buf[4] == 'B')
55			printf("PDA TM7000B detected\n");
56		else
57			printf("PDA TM7000 detected\n");
58		break;
59	case 4300:
60		printf("PDA TM4300 detected\n");
61		break;
62	case 5000:
63		printf("PDA TM5000 detected\n");
64		break;
65	}
66
67pda_detect_err:
68	env_set("pda", (const char *)buf);
69}
70#else
71void at91_pda_detect(void)
72{
73}
74#endif
75
76void at91_prepare_cpu_var(void)
77{
78	env_set("cpu", get_cpu_name());
79}
80