1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2
3 #include "superiotool.h"
4
5 #define DEVICE_SCRATCH_REG 0x21
6
7 static const struct superio_registers reg_table[] = {
8 {0x00, "AST2400", {
9 {NOLDN, NULL,
10 {0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,
11 0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,EOT},
12 {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
13 0x00,0x00,0x00,0x00,0x00,0x00,0x00,EOT}},
14 {0x02, "SUART1",
15 {0x30,0x60,0x61,0x70,0x71,0xf0,EOT},
16 {0x00,0x03,0xf8,0x04,0x02,RSVD,EOT}},
17 {0x03, "SUART2",
18 {0x30,0x60,0x61,0x70,0x71,0xf0,EOT},
19 {0x00,0x02,0xf8,0x03,0x02,0x00,EOT}},
20 {0x04, "SWC",
21 {0x30,0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
22 0x70,0x71,EOT},
23 {0x00,0x08,0xe6,0x08,0xe0,0x08,0xe4,0x08,0xe8,
24 0x09,0x01,EOT}},
25 {0x05, "Keyboard config (KBC)",
26 {0x30,0x60,0x61,0x62,0x63,0x70,0x71,0x72,0x73,
27 0xf0,EOT},
28 {0x00,0x00,0x60,0x00,0x64,0x01,0x02,0x0c,0x02,
29 0x83,EOT}},
30 {0x07, "GPIO",
31 {0x30,0x38,0x70,0x71,EOT},
32 {0x00,0x00,0x0b,0x01,EOT}},
33 {0x0b, "SUART3",
34 {0x30,0x60,0x61,0x70,0x71,0xf0,EOT},
35 {0x00,0x03,0xe8,0x06,0x02,0x00,EOT}},
36 {0x0c, "SUART4",
37 {0x30,0x60,0x61,0x70,0x71,0xf0,EOT},
38 {0x00,0x02,0xe8,0x05,0x02,0x00,EOT}},
39 {0x0d, "iLPC2AHB",
40 {0x30,0x70,0x71,0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,
41 0xf6,0xf7,0xf8,0xfe,EOT},
42 {0x00,0x09,0x01,NANA,NANA,NANA,NANA,NANA,NANA,
43 NANA,NANA,0x00,0x00,EOT}},
44 {0x0e, "Mailbox",
45 {0x30,0x60,0x61,0x70,0x71,EOT},
46 {0x00,0x08,0xc0,0x09,0x01,EOT}},
47 {EOT}}},
48 {EOT}
49 };
50
enter_conf_mode_ast(uint16_t port)51 static void enter_conf_mode_ast(uint16_t port)
52 {
53 OUTB(0xa5, port);
54 OUTB(0xa5, port);
55 }
56
exit_conf_mode_ast(uint16_t port)57 static void exit_conf_mode_ast(uint16_t port)
58 {
59 OUTB(0xaa, port);
60 }
61
detect_ast_superio(uint16_t port)62 static int detect_ast_superio(uint16_t port)
63 {
64 int i;
65 enter_conf_mode_ast(port);
66
67 /* Aspeed devices doesn't have a DEVICE_ID_REG.
68 * Host cycles that aren't decoded read as 0xff.
69 * Probe for the scratch register that are initialized to zero.
70 * The firmware might overwrite that, but it's the best we have.
71 */
72
73 for (i = DEVICE_SCRATCH_REG; i < 0x30; i++) {
74 if (regval(port, i) != 0xff)
75 break;
76 }
77 if (i == 0x30) {
78 if (verbose)
79 printf(NOTFOUND
80 "scratch registers all read as 0xff\n");
81 }
82 exit_conf_mode_ast(port);
83
84 return i < 0x30;
85 }
86
probe_idregs_aspeed(uint16_t port)87 void probe_idregs_aspeed(uint16_t port)
88 {
89 uint16_t chip_id = 0;
90
91 probing_for("Aspeed", "", port);
92
93 if (!detect_ast_superio(port))
94 return;
95
96 if (superio_unknown(reg_table, chip_id)) {
97 if (verbose)
98 printf(NOTFOUND "id=0x%02x\n", chip_id);
99 return;
100 }
101
102 printf("Found Aspeed %s (id=0x%02x) at 0x%x\n",
103 get_superio_name(reg_table, chip_id), chip_id, port);
104 chip_found = 1;
105
106 enter_conf_mode_ast(port);
107 dump_superio("Aspeed", reg_table, port, chip_id, LDN_SEL);
108 exit_conf_mode_ast(port);
109 }
110
print_aspeed_chips(void)111 void print_aspeed_chips(void)
112 {
113 print_vendor_chips("Aspeed", reg_table);
114 }
115