1 /*
2  * Copyright 2014 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Ben Skeggs <bskeggs@redhat.com>
23  */
24 #include <subdev/bios.h>
25 #include <subdev/bios/bit.h>
26 #include <subdev/bios/image.h>
27 #include <subdev/bios/pmu.h>
28 
29 u32
30 nvbios_pmuTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
31 {
32 	struct bit_entry bit_p;
33 	u32 data = 0;
34 
35 	if (!bit_entry(bios, 'p', &bit_p)) {
36 		if (bit_p.version == 2 && bit_p.length >= 4)
37 			data = nvbios_rd32(bios, bit_p.offset + 0x00);
38 		if (data) {
39 			*ver = nvbios_rd08(bios, data + 0x00); /* maybe? */
40 			*hdr = nvbios_rd08(bios, data + 0x01);
41 			*len = nvbios_rd08(bios, data + 0x02);
42 			*cnt = nvbios_rd08(bios, data + 0x03);
43 		}
44 	}
45 
46 	return data;
47 }
48 
49 u32
50 nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
51 {
52 	u8  cnt, len;
53 	u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
54 	if (data && idx < cnt) {
55 		data = data + *hdr + (idx * len);
56 		*hdr = len;
57 		return data;
58 	}
59 	return 0;
60 }
61 
62 u32
63 nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
64 	     struct nvbios_pmuE *info)
65 {
66 	u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
67 	if (data) {
68 		info->type = nvbios_rd08(bios, data + 0x00);
69 		info->data = nvbios_rd32(bios, data + 0x02);
70 	}
71 	return data;
72 }
73 
74 bool
75 nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info)
76 {
77 	struct nvbios_pmuE pmuE;
78 	u8  ver, hdr, idx = 0;
79 	u32 data;
80 	memset(info, 0x00, sizeof(*info));
81 	while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
82 		if (pmuE.type == type && (data = pmuE.data)) {
83 			info->init_addr_pmu = nvbios_rd32(bios, data + 0x08);
84 			info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c);
85 			info->boot_addr     = data + 0x30;
86 			info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) +
87 					      nvbios_rd32(bios, data + 0x18);
88 			info->boot_size     = nvbios_rd32(bios, data + 0x1c) -
89 					      nvbios_rd32(bios, data + 0x18);
90 			info->code_addr     = info->boot_addr + info->boot_size;
91 			info->code_addr_pmu = info->boot_addr_pmu +
92 					      info->boot_size;
93 			info->code_size     = nvbios_rd32(bios, data + 0x20);
94 			info->data_addr     = data + 0x30 +
95 					      nvbios_rd32(bios, data + 0x24);
96 			info->data_addr_pmu = nvbios_rd32(bios, data + 0x28);
97 			info->data_size     = nvbios_rd32(bios, data + 0x2c);
98 			return true;
99 		}
100 	}
101 	return false;
102 }
103