151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
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/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include <subdev/bios.h>
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#include <subdev/bios/dcb.h>
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#include <subdev/bios/gpio.h>
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#include <subdev/bios/xpio.h>
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u16
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dcb_gpio_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
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{
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u16 data = 0x0000;
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u16 dcb = dcb_table(bios, ver, hdr, cnt, len);
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if (dcb) {
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if (*ver >= 0x30 && *hdr >= 0x0c)
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data = nvbios_rd16(bios, dcb + 0x0a);
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else
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if (*ver >= 0x22 && nvbios_rd08(bios, dcb - 1) >= 0x13)
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data = nvbios_rd16(bios, dcb - 0x0f);
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if (data) {
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*ver = nvbios_rd08(bios, data + 0x00);
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if (*ver < 0x30) {
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*hdr = 3;
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*cnt = nvbios_rd08(bios, data + 0x02);
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*len = nvbios_rd08(bios, data + 0x01);
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} else
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if (*ver <= 0x41) {
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*hdr = nvbios_rd08(bios, data + 0x01);
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*cnt = nvbios_rd08(bios, data + 0x02);
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*len = nvbios_rd08(bios, data + 0x03);
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} else {
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data = 0x0000;
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}
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}
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}
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return data;
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}
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u16
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dcb_gpio_entry(struct nvkm_bios *bios, int idx, int ent, u8 *ver, u8 *len)
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{
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u8 hdr, cnt, xver; /* use gpio version for xpio entry parsing */
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u16 gpio;
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if (!idx--)
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gpio = dcb_gpio_table(bios, ver, &hdr, &cnt, len);
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else
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gpio = dcb_xpio_table(bios, idx, &xver, &hdr, &cnt, len);
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if (gpio && ent < cnt)
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return gpio + hdr + (ent * *len);
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return 0x0000;
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}
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u16
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dcb_gpio_parse(struct nvkm_bios *bios, int idx, int ent, u8 *ver, u8 *len,
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struct dcb_gpio_func *gpio)
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{
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u16 data = dcb_gpio_entry(bios, idx, ent, ver, len);
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if (data) {
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if (*ver < 0x40) {
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u16 info = nvbios_rd16(bios, data);
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*gpio = (struct dcb_gpio_func) {
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.line = (info & 0x001f) >> 0,
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.func = (info & 0x07e0) >> 5,
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.log[0] = (info & 0x1800) >> 11,
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.log[1] = (info & 0x6000) >> 13,
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.param = !!(info & 0x8000),
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};
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} else
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if (*ver < 0x41) {
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u32 info = nvbios_rd32(bios, data);
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*gpio = (struct dcb_gpio_func) {
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.line = (info & 0x0000001f) >> 0,
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.func = (info & 0x0000ff00) >> 8,
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.log[0] = (info & 0x18000000) >> 27,
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.log[1] = (info & 0x60000000) >> 29,
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.param = !!(info & 0x80000000),
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};
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} else {
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u32 info = nvbios_rd32(bios, data + 0);
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u8 info1 = nvbios_rd32(bios, data + 4);
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*gpio = (struct dcb_gpio_func) {
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.line = (info & 0x0000003f) >> 0,
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.func = (info & 0x0000ff00) >> 8,
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.log[0] = (info1 & 0x30) >> 4,
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.log[1] = (info1 & 0xc0) >> 6,
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.param = !!(info & 0x80000000),
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};
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}
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}
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return data;
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}
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u16
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dcb_gpio_match(struct nvkm_bios *bios, int idx, u8 func, u8 line,
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u8 *ver, u8 *len, struct dcb_gpio_func *gpio)
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{
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u8 hdr, cnt, i = 0;
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u16 data;
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while ((data = dcb_gpio_parse(bios, idx, i++, ver, len, gpio))) {
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if ((line == 0xff || line == gpio->line) &&
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(func == 0xff || func == gpio->func))
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return data;
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}
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/* DCB 2.2, fixed TVDAC GPIO data */
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if ((data = dcb_table(bios, ver, &hdr, &cnt, len))) {
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if (*ver >= 0x22 && *ver < 0x30 && func == DCB_GPIO_TVDAC0) {
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u8 conf = nvbios_rd08(bios, data - 5);
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u8 addr = nvbios_rd08(bios, data - 4);
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if (conf & 0x01) {
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*gpio = (struct dcb_gpio_func) {
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.func = DCB_GPIO_TVDAC0,
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.line = addr >> 4,
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.log[0] = !!(conf & 0x02),
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.log[1] = !(conf & 0x02),
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};
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*ver = 0x00;
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return data;
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}
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}
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}
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return 0x0000;
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}
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