| 1 | /* $NetBSD: nouveau_subdev_gpio_nvd0.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2012 Red Hat Inc. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: Ben Skeggs |
| 25 | */ |
| 26 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_gpio_nvd0.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $" ); |
| 29 | |
| 30 | #include "priv.h" |
| 31 | |
| 32 | struct nvd0_gpio_priv { |
| 33 | struct nouveau_gpio base; |
| 34 | }; |
| 35 | |
| 36 | void |
| 37 | nvd0_gpio_reset(struct nouveau_gpio *gpio, u8 match) |
| 38 | { |
| 39 | struct nouveau_bios *bios = nouveau_bios(gpio); |
| 40 | struct nvd0_gpio_priv *priv = (void *)gpio; |
| 41 | u8 ver, len; |
| 42 | u16 entry; |
| 43 | int ent = -1; |
| 44 | |
| 45 | while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) { |
| 46 | u32 data = nv_ro32(bios, entry); |
| 47 | u8 line = (data & 0x0000003f); |
| 48 | u8 defs = !!(data & 0x00000080); |
| 49 | u8 func = (data & 0x0000ff00) >> 8; |
| 50 | u8 unk0 = (data & 0x00ff0000) >> 16; |
| 51 | u8 unk1 = (data & 0x1f000000) >> 24; |
| 52 | |
| 53 | if ( func == DCB_GPIO_UNUSED || |
| 54 | (match != DCB_GPIO_UNUSED && match != func)) |
| 55 | continue; |
| 56 | |
| 57 | gpio->set(gpio, 0, func, line, defs); |
| 58 | |
| 59 | nv_mask(priv, 0x00d610 + (line * 4), 0xff, unk0); |
| 60 | if (unk1--) |
| 61 | nv_mask(priv, 0x00d740 + (unk1 * 4), 0xff, line); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | int |
| 66 | nvd0_gpio_drive(struct nouveau_gpio *gpio, int line, int dir, int out) |
| 67 | { |
| 68 | u32 data = ((dir ^ 1) << 13) | (out << 12); |
| 69 | nv_mask(gpio, 0x00d610 + (line * 4), 0x00003000, data); |
| 70 | nv_mask(gpio, 0x00d604, 0x00000001, 0x00000001); /* update? */ |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | int |
| 75 | nvd0_gpio_sense(struct nouveau_gpio *gpio, int line) |
| 76 | { |
| 77 | return !!(nv_rd32(gpio, 0x00d610 + (line * 4)) & 0x00004000); |
| 78 | } |
| 79 | |
| 80 | static int |
| 81 | nvd0_gpio_ctor(struct nouveau_object *parent, struct nouveau_object *engine, |
| 82 | struct nouveau_oclass *oclass, void *data, u32 size, |
| 83 | struct nouveau_object **pobject) |
| 84 | { |
| 85 | struct nvd0_gpio_priv *priv; |
| 86 | int ret; |
| 87 | |
| 88 | ret = nouveau_gpio_create(parent, engine, oclass, 32, &priv); |
| 89 | *pobject = nv_object(priv); |
| 90 | if (ret) |
| 91 | return ret; |
| 92 | |
| 93 | priv->base.reset = nvd0_gpio_reset; |
| 94 | priv->base.drive = nvd0_gpio_drive; |
| 95 | priv->base.sense = nvd0_gpio_sense; |
| 96 | priv->base.events->priv = priv; |
| 97 | priv->base.events->enable = nv50_gpio_intr_enable; |
| 98 | priv->base.events->disable = nv50_gpio_intr_disable; |
| 99 | nv_subdev(priv)->intr = nv50_gpio_intr; |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | struct nouveau_oclass |
| 104 | nvd0_gpio_oclass = { |
| 105 | .handle = NV_SUBDEV(GPIO, 0xd0), |
| 106 | .ofuncs = &(struct nouveau_ofuncs) { |
| 107 | .ctor = nvd0_gpio_ctor, |
| 108 | .dtor = nv50_gpio_dtor, |
| 109 | .init = nv50_gpio_init, |
| 110 | .fini = nv50_gpio_fini, |
| 111 | }, |
| 112 | }; |
| 113 | |