diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/gpio/nvd0.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/gpio/nvd0.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/gpio/nvd0.c b/drivers/gpu/drm/nouveau/core/subdev/gpio/nvd0.c new file mode 100644 index 000000000000..8d18fcad26e0 --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/subdev/gpio/nvd0.c @@ -0,0 +1,104 @@ +/* + * 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 nvd0_gpio_priv { + struct nouveau_gpio base; +}; + +static void +nvd0_gpio_reset(struct nouveau_gpio *gpio) +{ + struct nouveau_bios *bios = nouveau_bios(gpio); + struct nvd0_gpio_priv *priv = (void *)gpio; + u16 entry; + u8 ver; + int ent = -1; + + while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver))) { + u32 data = nv_ro32(bios, entry); + u8 line = (data & 0x0000003f); + u8 defs = !!(data & 0x00000080); + u8 func = (data & 0x0000ff00) >> 8; + u8 unk0 = (data & 0x00ff0000) >> 16; + u8 unk1 = (data & 0x1f000000) >> 24; + + if (func == 0xff) + continue; + + gpio->set(gpio, 0, func, line, defs); + + nv_mask(priv, 0x00d610 + (line * 4), 0xff, unk0); + if (unk1--) + nv_mask(priv, 0x00d740 + (unk1 * 4), 0xff, line); + } +} + +static int +nvd0_gpio_drive(struct nouveau_gpio *gpio, int line, int dir, int out) +{ + u32 data = ((dir ^ 1) << 13) | (out << 12); + nv_mask(gpio, 0x00d610 + (line * 4), 0x00003000, data); + nv_mask(gpio, 0x00d604, 0x00000001, 0x00000001); /* update? */ + return 0; +} + +static int +nvd0_gpio_sense(struct nouveau_gpio *gpio, int line) +{ + return !!(nv_rd32(gpio, 0x00d610 + (line * 4)) & 0x00004000); +} + +static int +nvd0_gpio_ctor(struct nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, void *data, u32 size, + struct nouveau_object **pobject) +{ + struct nvd0_gpio_priv *priv; + int ret; + + ret = nouveau_gpio_create(parent, engine, oclass, &priv); + *pobject = nv_object(priv); + if (ret) + return ret; + + priv->base.reset = nvd0_gpio_reset; + priv->base.drive = nvd0_gpio_drive; + priv->base.sense = nvd0_gpio_sense; + priv->base.irq_enable = nv50_gpio_irq_enable; + nv_subdev(priv)->intr = nv50_gpio_intr; + return 0; +} + +struct nouveau_oclass +nvd0_gpio_oclass = { + .handle = NV_SUBDEV(GPIO, 0xd0), + .ofuncs = &(struct nouveau_ofuncs) { + .ctor = nvd0_gpio_ctor, + .dtor = nv50_gpio_dtor, + .init = nv50_gpio_init, + .fini = nv50_gpio_fini, + }, +}; |