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- /*
- * 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 "priv.h"
- void
- nv50_gpio_reset(struct nvkm_gpio *gpio, u8 match)
- {
- struct nvkm_device *device = gpio->subdev.device;
- struct nvkm_bios *bios = device->bios;
- u8 ver, len;
- u16 entry;
- int ent = -1;
- while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
- static const u32 regs[] = { 0xe100, 0xe28c };
- u32 data = nvbios_rd32(bios, entry);
- u8 line = (data & 0x0000001f);
- u8 func = (data & 0x0000ff00) >> 8;
- u8 defs = !!(data & 0x01000000);
- u8 unk0 = !!(data & 0x02000000);
- u8 unk1 = !!(data & 0x04000000);
- u32 val = (unk1 << 16) | unk0;
- u32 reg = regs[line >> 4];
- u32 lsh = line & 0x0f;
- if ( func == DCB_GPIO_UNUSED ||
- (match != DCB_GPIO_UNUSED && match != func))
- continue;
- nvkm_gpio_set(gpio, 0, func, line, defs);
- nvkm_mask(device, reg, 0x00010001 << lsh, val << lsh);
- }
- }
- static int
- nv50_gpio_location(int line, u32 *reg, u32 *shift)
- {
- const u32 nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 };
- if (line >= 32)
- return -EINVAL;
- *reg = nv50_gpio_reg[line >> 3];
- *shift = (line & 7) << 2;
- return 0;
- }
- int
- nv50_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
- {
- struct nvkm_device *device = gpio->subdev.device;
- u32 reg, shift;
- if (nv50_gpio_location(line, ®, &shift))
- return -EINVAL;
- nvkm_mask(device, reg, 3 << shift, (((dir ^ 1) << 1) | out) << shift);
- return 0;
- }
- int
- nv50_gpio_sense(struct nvkm_gpio *gpio, int line)
- {
- struct nvkm_device *device = gpio->subdev.device;
- u32 reg, shift;
- if (nv50_gpio_location(line, ®, &shift))
- return -EINVAL;
- return !!(nvkm_rd32(device, reg) & (4 << shift));
- }
- static void
- nv50_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
- {
- struct nvkm_device *device = gpio->subdev.device;
- u32 intr = nvkm_rd32(device, 0x00e054);
- u32 stat = nvkm_rd32(device, 0x00e050) & intr;
- *lo = (stat & 0xffff0000) >> 16;
- *hi = (stat & 0x0000ffff);
- nvkm_wr32(device, 0x00e054, intr);
- }
- static void
- nv50_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
- {
- struct nvkm_device *device = gpio->subdev.device;
- u32 inte = nvkm_rd32(device, 0x00e050);
- if (type & NVKM_GPIO_LO)
- inte = (inte & ~(mask << 16)) | (data << 16);
- if (type & NVKM_GPIO_HI)
- inte = (inte & ~mask) | data;
- nvkm_wr32(device, 0x00e050, inte);
- }
- static const struct nvkm_gpio_func
- nv50_gpio = {
- .lines = 16,
- .intr_stat = nv50_gpio_intr_stat,
- .intr_mask = nv50_gpio_intr_mask,
- .drive = nv50_gpio_drive,
- .sense = nv50_gpio_sense,
- .reset = nv50_gpio_reset,
- };
- int
- nv50_gpio_new(struct nvkm_device *device, int index, struct nvkm_gpio **pgpio)
- {
- return nvkm_gpio_new_(&nv50_gpio, device, index, pgpio);
- }
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