87 lines
2.7 KiB
C
87 lines
2.7 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 "priv.h"
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void
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gf119_gpio_reset(struct nvkm_gpio *gpio, u8 match)
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{
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struct nvkm_device *device = gpio->subdev.device;
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struct nvkm_bios *bios = device->bios;
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u8 ver, len;
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u16 entry;
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int ent = -1;
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while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
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u32 data = nvbios_rd32(bios, entry);
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u8 line = (data & 0x0000003f);
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u8 defs = !!(data & 0x00000080);
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u8 func = (data & 0x0000ff00) >> 8;
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u8 unk0 = (data & 0x00ff0000) >> 16;
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u8 unk1 = (data & 0x1f000000) >> 24;
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if ( func == DCB_GPIO_UNUSED ||
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(match != DCB_GPIO_UNUSED && match != func))
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continue;
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nvkm_gpio_set(gpio, 0, func, line, defs);
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nvkm_mask(device, 0x00d610 + (line * 4), 0xff, unk0);
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if (unk1--)
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nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
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}
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}
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int
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gf119_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
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{
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struct nvkm_device *device = gpio->subdev.device;
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u32 data = ((dir ^ 1) << 13) | (out << 12);
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nvkm_mask(device, 0x00d610 + (line * 4), 0x00003000, data);
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nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
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return 0;
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}
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int
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gf119_gpio_sense(struct nvkm_gpio *gpio, int line)
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{
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struct nvkm_device *device = gpio->subdev.device;
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return !!(nvkm_rd32(device, 0x00d610 + (line * 4)) & 0x00004000);
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}
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static const struct nvkm_gpio_func
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gf119_gpio = {
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.lines = 32,
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.intr_stat = g94_gpio_intr_stat,
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.intr_mask = g94_gpio_intr_mask,
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.drive = gf119_gpio_drive,
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.sense = gf119_gpio_sense,
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.reset = gf119_gpio_reset,
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};
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int
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gf119_gpio_new(struct nvkm_device *device, int index, struct nvkm_gpio **pgpio)
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{
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return nvkm_gpio_new_(&gf119_gpio, device, index, pgpio);
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}
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