diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/gpio.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/gpio.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/gpio.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/gpio.c new file mode 100644 index 000000000000..172a4f999990 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/gpio.c @@ -0,0 +1,150 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs + */ + +#include <subdev/bios.h> +#include <subdev/bios/dcb.h> +#include <subdev/bios/gpio.h> +#include <subdev/bios/xpio.h> + +u16 +dcb_gpio_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) +{ + u16 data = 0x0000; + u16 dcb = dcb_table(bios, ver, hdr, cnt, len); + if (dcb) { + if (*ver >= 0x30 && *hdr >= 0x0c) + data = nv_ro16(bios, dcb + 0x0a); + else + if (*ver >= 0x22 && nv_ro08(bios, dcb - 1) >= 0x13) + data = nv_ro16(bios, dcb - 0x0f); + + if (data) { + *ver = nv_ro08(bios, data + 0x00); + if (*ver < 0x30) { + *hdr = 3; + *cnt = nv_ro08(bios, data + 0x02); + *len = nv_ro08(bios, data + 0x01); + } else + if (*ver <= 0x41) { + *hdr = nv_ro08(bios, data + 0x01); + *cnt = nv_ro08(bios, data + 0x02); + *len = nv_ro08(bios, data + 0x03); + } else { + data = 0x0000; + } + } + } + return data; +} + +u16 +dcb_gpio_entry(struct nouveau_bios *bios, int idx, int ent, u8 *ver, u8 *len) +{ + u8 hdr, cnt, xver; /* use gpio version for xpio entry parsing */ + u16 gpio; + + if (!idx--) + gpio = dcb_gpio_table(bios, ver, &hdr, &cnt, len); + else + gpio = dcb_xpio_table(bios, idx, &xver, &hdr, &cnt, len); + + if (gpio && ent < cnt) + return gpio + hdr + (ent * *len); + return 0x0000; +} + +u16 +dcb_gpio_parse(struct nouveau_bios *bios, int idx, int ent, u8 *ver, u8 *len, + struct dcb_gpio_func *gpio) +{ + u16 data = dcb_gpio_entry(bios, idx, ent, ver, len); + if (data) { + if (*ver < 0x40) { + u16 info = nv_ro16(bios, data); + *gpio = (struct dcb_gpio_func) { + .line = (info & 0x001f) >> 0, + .func = (info & 0x07e0) >> 5, + .log[0] = (info & 0x1800) >> 11, + .log[1] = (info & 0x6000) >> 13, + .param = !!(info & 0x8000), + }; + } else + if (*ver < 0x41) { + u32 info = nv_ro32(bios, data); + *gpio = (struct dcb_gpio_func) { + .line = (info & 0x0000001f) >> 0, + .func = (info & 0x0000ff00) >> 8, + .log[0] = (info & 0x18000000) >> 27, + .log[1] = (info & 0x60000000) >> 29, + .param = !!(info & 0x80000000), + }; + } else { + u32 info = nv_ro32(bios, data + 0); + u8 info1 = nv_ro32(bios, data + 4); + *gpio = (struct dcb_gpio_func) { + .line = (info & 0x0000003f) >> 0, + .func = (info & 0x0000ff00) >> 8, + .log[0] = (info1 & 0x30) >> 4, + .log[1] = (info1 & 0xc0) >> 6, + .param = !!(info & 0x80000000), + }; + } + } + + return data; +} + +u16 +dcb_gpio_match(struct nouveau_bios *bios, int idx, u8 func, u8 line, + u8 *ver, u8 *len, struct dcb_gpio_func *gpio) +{ + u8 hdr, cnt, i = 0; + u16 data; + + while ((data = dcb_gpio_parse(bios, idx, i++, ver, len, gpio))) { + if ((line == 0xff || line == gpio->line) && + (func == 0xff || func == gpio->func)) + return data; + } + + /* DCB 2.2, fixed TVDAC GPIO data */ + if ((data = dcb_table(bios, ver, &hdr, &cnt, len))) { + if (*ver >= 0x22 && *ver < 0x30 && func == DCB_GPIO_TVDAC0) { + u8 conf = nv_ro08(bios, data - 5); + u8 addr = nv_ro08(bios, data - 4); + if (conf & 0x01) { + *gpio = (struct dcb_gpio_func) { + .func = DCB_GPIO_TVDAC0, + .line = addr >> 4, + .log[0] = !!(conf & 0x02), + .log[1] = !(conf & 0x02), + }; + *ver = 0x00; + return data; + } + } + } + + return 0x0000; +} |