134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
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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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nv50_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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static const u32 regs[] = { 0xe100, 0xe28c };
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u32 data = nvbios_rd32(bios, entry);
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u8 line = (data & 0x0000001f);
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u8 func = (data & 0x0000ff00) >> 8;
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u8 defs = !!(data & 0x01000000);
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u8 unk0 = !!(data & 0x02000000);
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u8 unk1 = !!(data & 0x04000000);
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u32 val = (unk1 << 16) | unk0;
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u32 reg = regs[line >> 4];
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u32 lsh = line & 0x0f;
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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, reg, 0x00010001 << lsh, val << lsh);
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}
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}
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static int
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nv50_gpio_location(int line, u32 *reg, u32 *shift)
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{
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const u32 nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 };
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if (line >= 32)
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return -EINVAL;
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*reg = nv50_gpio_reg[line >> 3];
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*shift = (line & 7) << 2;
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return 0;
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}
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int
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nv50_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 reg, shift;
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if (nv50_gpio_location(line, ®, &shift))
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return -EINVAL;
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nvkm_mask(device, reg, 3 << shift, (((dir ^ 1) << 1) | out) << shift);
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return 0;
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}
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int
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nv50_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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u32 reg, shift;
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if (nv50_gpio_location(line, ®, &shift))
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return -EINVAL;
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return !!(nvkm_rd32(device, reg) & (4 << shift));
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}
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static void
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nv50_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
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{
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struct nvkm_device *device = gpio->subdev.device;
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u32 intr = nvkm_rd32(device, 0x00e054);
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u32 stat = nvkm_rd32(device, 0x00e050) & intr;
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*lo = (stat & 0xffff0000) >> 16;
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*hi = (stat & 0x0000ffff);
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nvkm_wr32(device, 0x00e054, intr);
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}
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static void
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nv50_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
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{
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struct nvkm_device *device = gpio->subdev.device;
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u32 inte = nvkm_rd32(device, 0x00e050);
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if (type & NVKM_GPIO_LO)
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inte = (inte & ~(mask << 16)) | (data << 16);
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if (type & NVKM_GPIO_HI)
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inte = (inte & ~mask) | data;
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nvkm_wr32(device, 0x00e050, inte);
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}
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static const struct nvkm_gpio_func
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nv50_gpio = {
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.lines = 16,
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.intr_stat = nv50_gpio_intr_stat,
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.intr_mask = nv50_gpio_intr_mask,
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.drive = nv50_gpio_drive,
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.sense = nv50_gpio_sense,
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.reset = nv50_gpio_reset,
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};
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int
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nv50_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
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struct nvkm_gpio **pgpio)
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{
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return nvkm_gpio_new_(&nv50_gpio, device, type, inst, pgpio);
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}
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