1 /* 2 * Copyright 2012 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 23 */ 24 #include <subdev/bios.h> 25 #include <subdev/bios/gpio.h> 26 #include <subdev/bios/xpio.h> 27 28 static u16 29 dcb_xpiod_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 30 { 31 u16 data = dcb_gpio_table(bios, ver, hdr, cnt, len); 32 if (data && *ver >= 0x40 && *hdr >= 0x06) { 33 u16 xpio = nvbios_rd16(bios, data + 0x04); 34 if (xpio) { 35 *ver = nvbios_rd08(bios, data + 0x00); 36 *hdr = nvbios_rd08(bios, data + 0x01); 37 *cnt = nvbios_rd08(bios, data + 0x02); 38 *len = nvbios_rd08(bios, data + 0x03); 39 return xpio; 40 } 41 } 42 return 0x0000; 43 } 44 45 u16 46 dcb_xpio_table(struct nvkm_bios *bios, u8 idx, 47 u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 48 { 49 u16 data = dcb_xpiod_table(bios, ver, hdr, cnt, len); 50 if (data && idx < *cnt) { 51 u16 xpio = nvbios_rd16(bios, data + *hdr + (idx * *len)); 52 if (xpio) { 53 *ver = nvbios_rd08(bios, data + 0x00); 54 *hdr = nvbios_rd08(bios, data + 0x01); 55 *cnt = nvbios_rd08(bios, data + 0x02); 56 *len = nvbios_rd08(bios, data + 0x03); 57 return xpio; 58 } 59 } 60 return 0x0000; 61 } 62 63 u16 64 dcb_xpio_parse(struct nvkm_bios *bios, u8 idx, 65 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_xpio *info) 66 { 67 u16 data = dcb_xpio_table(bios, idx, ver, hdr, cnt, len); 68 if (data && *len >= 6) { 69 info->type = nvbios_rd08(bios, data + 0x04); 70 info->addr = nvbios_rd08(bios, data + 0x05); 71 info->flags = nvbios_rd08(bios, data + 0x06); 72 } 73 return 0x0000; 74 } 75