diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nv50.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nv50.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nv50.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nv50.c new file mode 100644 index 000000000000..6a031035bd27 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nv50.c @@ -0,0 +1,128 @@ +/* + * 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_bios *bios = nvkm_bios(gpio); + 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 = nv_ro32(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; + + gpio->set(gpio, 0, func, line, defs); + + nv_mask(gpio, reg, 0x00010001 << lsh, val << lsh); + } +} + +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) +{ + u32 reg, shift; + + if (nv50_gpio_location(line, ®, &shift)) + return -EINVAL; + + nv_mask(gpio, reg, 3 << shift, (((dir ^ 1) << 1) | out) << shift); + return 0; +} + +int +nv50_gpio_sense(struct nvkm_gpio *gpio, int line) +{ + u32 reg, shift; + + if (nv50_gpio_location(line, ®, &shift)) + return -EINVAL; + + return !!(nv_rd32(gpio, reg) & (4 << shift)); +} + +static void +nv50_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo) +{ + u32 intr = nv_rd32(gpio, 0x00e054); + u32 stat = nv_rd32(gpio, 0x00e050) & intr; + *lo = (stat & 0xffff0000) >> 16; + *hi = (stat & 0x0000ffff); + nv_wr32(gpio, 0x00e054, intr); +} + +static void +nv50_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data) +{ + u32 inte = nv_rd32(gpio, 0x00e050); + if (type & NVKM_GPIO_LO) + inte = (inte & ~(mask << 16)) | (data << 16); + if (type & NVKM_GPIO_HI) + inte = (inte & ~mask) | data; + nv_wr32(gpio, 0x00e050, inte); +} + +struct nvkm_oclass * +nv50_gpio_oclass = &(struct nvkm_gpio_impl) { + .base.handle = NV_SUBDEV(GPIO, 0x50), + .base.ofuncs = &(struct nvkm_ofuncs) { + .ctor = _nvkm_gpio_ctor, + .dtor = _nvkm_gpio_dtor, + .init = _nvkm_gpio_init, + .fini = _nvkm_gpio_fini, + }, + .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, +}.base; |