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