75 lines
2.5 KiB
C
75 lines
2.5 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/gpio.h>
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#include <subdev/bios/xpio.h>
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static u16
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dcb_xpiod_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
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{
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u16 data = dcb_gpio_table(bios, ver, hdr, cnt, len);
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if (data && *ver >= 0x40 && *hdr >= 0x06) {
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u16 xpio = nvbios_rd16(bios, data + 0x04);
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if (xpio) {
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*ver = nvbios_rd08(bios, data + 0x00);
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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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return xpio;
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}
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}
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return 0x0000;
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}
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u16
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dcb_xpio_table(struct nvkm_bios *bios, u8 idx,
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u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
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{
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u16 data = dcb_xpiod_table(bios, ver, hdr, cnt, len);
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if (data && idx < *cnt) {
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u16 xpio = nvbios_rd16(bios, data + *hdr + (idx * *len));
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if (xpio) {
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*ver = nvbios_rd08(bios, data + 0x00);
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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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return xpio;
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}
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}
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return 0x0000;
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}
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u16
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dcb_xpio_parse(struct nvkm_bios *bios, u8 idx,
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u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_xpio *info)
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{
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u16 data = dcb_xpio_table(bios, idx, ver, hdr, cnt, len);
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if (data && *len >= 6) {
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info->type = nvbios_rd08(bios, data + 0x04);
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info->addr = nvbios_rd08(bios, data + 0x05);
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info->flags = nvbios_rd08(bios, data + 0x06);
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}
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return 0x0000;
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}
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