diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/gpio/nv50.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/gpio/nv50.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/gpio/nv50.c b/drivers/gpu/drm/nouveau/core/subdev/gpio/nv50.c new file mode 100644 index 000000000000..f3502c961cd9 --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/subdev/gpio/nv50.c @@ -0,0 +1,194 @@ +/* + * 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/gpio.h> + +struct nv50_gpio_priv { + struct nouveau_gpio base; +}; + +static void +nv50_gpio_reset(struct nouveau_gpio *gpio) +{ + struct nouveau_bios *bios = nouveau_bios(gpio); + struct nv50_gpio_priv *priv = (void *)gpio; + u16 entry; + u8 ver; + int ent = -1; + + while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver))) { + 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]; line &= 0x0f; + + if (func == 0xff) + continue; + + gpio->set(gpio, 0, func, line, defs); + + nv_mask(priv, reg, 0x00010001 << line, val << line); + } +} + +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; +} + +static int +nv50_gpio_drive(struct nouveau_gpio *gpio, int line, int dir, int out) +{ + u32 reg, shift; + + if (nv50_gpio_location(line, ®, &shift)) + return -EINVAL; + + nv_mask(gpio, reg, 7 << shift, (((dir ^ 1) << 1) | out) << shift); + return 0; +} + +static int +nv50_gpio_sense(struct nouveau_gpio *gpio, int line) +{ + u32 reg, shift; + + if (nv50_gpio_location(line, ®, &shift)) + return -EINVAL; + + return !!(nv_rd32(gpio, reg) & (4 << shift)); +} + +void +nv50_gpio_irq_enable(struct nouveau_gpio *gpio, int line, bool on) +{ + u32 reg = line < 16 ? 0xe050 : 0xe070; + u32 mask = 0x00010001 << (line & 0xf); + + nv_wr32(gpio, reg + 4, mask); + nv_mask(gpio, reg + 0, mask, on ? mask : 0); +} + +void +nv50_gpio_intr(struct nouveau_subdev *subdev) +{ + struct nv50_gpio_priv *priv = (void *)subdev; + u32 intr0, intr1 = 0; + u32 hi, lo; + + intr0 = nv_rd32(priv, 0xe054) & nv_rd32(priv, 0xe050); + if (nv_device(priv)->chipset >= 0x90) + intr1 = nv_rd32(priv, 0xe074) & nv_rd32(priv, 0xe070); + + hi = (intr0 & 0x0000ffff) | (intr1 << 16); + lo = (intr0 >> 16) | (intr1 & 0xffff0000); + priv->base.isr_run(&priv->base, 0, hi | lo); + + nv_wr32(priv, 0xe054, intr0); + if (nv_device(priv)->chipset >= 0x90) + nv_wr32(priv, 0xe074, intr1); +} + +static int +nv50_gpio_ctor(struct nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, void *data, u32 size, + struct nouveau_object **pobject) +{ + struct nv50_gpio_priv *priv; + int ret; + + ret = nouveau_gpio_create(parent, engine, oclass, &priv); + *pobject = nv_object(priv); + if (ret) + return ret; + + priv->base.reset = nv50_gpio_reset; + priv->base.drive = nv50_gpio_drive; + priv->base.sense = nv50_gpio_sense; + priv->base.irq_enable = nv50_gpio_irq_enable; + nv_subdev(priv)->intr = nv50_gpio_intr; + return 0; +} + +void +nv50_gpio_dtor(struct nouveau_object *object) +{ + struct nv50_gpio_priv *priv = (void *)object; + nouveau_gpio_destroy(&priv->base); +} + +int +nv50_gpio_init(struct nouveau_object *object) +{ + struct nv50_gpio_priv *priv = (void *)object; + int ret; + + ret = nouveau_gpio_init(&priv->base); + if (ret) + return ret; + + /* disable, and ack any pending gpio interrupts */ + nv_wr32(priv, 0xe050, 0x00000000); + nv_wr32(priv, 0xe054, 0xffffffff); + if (nv_device(priv)->chipset >= 0x90) { + nv_wr32(priv, 0xe070, 0x00000000); + nv_wr32(priv, 0xe074, 0xffffffff); + } + + return 0; +} + +int +nv50_gpio_fini(struct nouveau_object *object, bool suspend) +{ + struct nv50_gpio_priv *priv = (void *)object; + nv_wr32(priv, 0xe050, 0x00000000); + if (nv_device(priv)->chipset >= 0x90) + nv_wr32(priv, 0xe070, 0x00000000); + return nouveau_gpio_fini(&priv->base, suspend); +} + +struct nouveau_oclass +nv50_gpio_oclass = { + .handle = NV_SUBDEV(GPIO, 0x50), + .ofuncs = &(struct nouveau_ofuncs) { + .ctor = nv50_gpio_ctor, + .dtor = nv50_gpio_dtor, + .init = nv50_gpio_init, + .fini = nv50_gpio_fini, + }, +}; |