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