2 * Copyright 2012 Red Hat Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
25 #include <subdev/bios.h>
26 #include <subdev/bios/dcb.h>
27 #include <subdev/bios/gpio.h>
30 dcb_gpio_table(struct nouveau_bios *bios)
32 u8 ver, hdr, cnt, len;
33 u16 dcb = dcb_table(bios, &ver, &hdr, &cnt, &len);
35 if (ver >= 0x30 && hdr >= 0x0c)
36 return nv_ro16(bios, dcb + 0x0a);
37 if (ver >= 0x22 && nv_ro08(bios, dcb - 1) >= 0x13)
38 return nv_ro16(bios, dcb - 0x0f);
44 dcb_gpio_entry(struct nouveau_bios *bios, int idx, int ent, u8 *ver)
46 u16 gpio = dcb_gpio_table(bios);
48 *ver = nv_ro08(bios, gpio);
49 if (*ver < 0x30 && ent < nv_ro08(bios, gpio + 2))
50 return gpio + 3 + (ent * nv_ro08(bios, gpio + 1));
51 else if (ent < nv_ro08(bios, gpio + 2))
52 return gpio + nv_ro08(bios, gpio + 1) +
53 (ent * nv_ro08(bios, gpio + 3));
59 dcb_gpio_parse(struct nouveau_bios *bios, int idx, u8 func, u8 line,
60 struct dcb_gpio_func *gpio)
62 u8 ver, hdr, cnt, len;
66 while ((entry = dcb_gpio_entry(bios, idx, ++i, &ver))) {
68 u16 data = nv_ro16(bios, entry);
69 *gpio = (struct dcb_gpio_func) {
70 .line = (data & 0x001f) >> 0,
71 .func = (data & 0x07e0) >> 5,
72 .log[0] = (data & 0x1800) >> 11,
73 .log[1] = (data & 0x6000) >> 13,
74 .param = !!(data & 0x8000),
78 u32 data = nv_ro32(bios, entry);
79 *gpio = (struct dcb_gpio_func) {
80 .line = (data & 0x0000001f) >> 0,
81 .func = (data & 0x0000ff00) >> 8,
82 .log[0] = (data & 0x18000000) >> 27,
83 .log[1] = (data & 0x60000000) >> 29,
84 .param = !!(data & 0x80000000),
87 u32 data = nv_ro32(bios, entry + 0);
88 u8 data1 = nv_ro32(bios, entry + 4);
89 *gpio = (struct dcb_gpio_func) {
90 .line = (data & 0x0000003f) >> 0,
91 .func = (data & 0x0000ff00) >> 8,
92 .log[0] = (data1 & 0x30) >> 4,
93 .log[1] = (data1 & 0xc0) >> 6,
94 .param = !!(data & 0x80000000),
98 if ((line == 0xff || line == gpio->line) &&
99 (func == 0xff || func == gpio->func))
103 /* DCB 2.2, fixed TVDAC GPIO data */
104 if ((entry = dcb_table(bios, &ver, &hdr, &cnt, &len))) {
105 if (ver >= 0x22 && ver < 0x30 && func == DCB_GPIO_TVDAC0) {
106 u8 conf = nv_ro08(bios, entry - 5);
107 u8 addr = nv_ro08(bios, entry - 4);
109 *gpio = (struct dcb_gpio_func) {
110 .func = DCB_GPIO_TVDAC0,
112 .log[0] = !!(conf & 0x02),
113 .log[1] = !(conf & 0x02),