nvd0.c revision d2bcea686f21e11415828fcca21a4eb200c6251f
1/* 2 * Copyright 2012 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs 23 */ 24 25#include <subdev/gpio.h> 26 27struct nvd0_gpio_priv { 28 struct nouveau_gpio base; 29}; 30 31static void 32nvd0_gpio_reset(struct nouveau_gpio *gpio) 33{ 34 struct nouveau_bios *bios = nouveau_bios(gpio); 35 struct nvd0_gpio_priv *priv = (void *)gpio; 36 u8 ver, len; 37 u16 entry; 38 int ent = -1; 39 40 while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) { 41 u32 data = nv_ro32(bios, entry); 42 u8 line = (data & 0x0000003f); 43 u8 defs = !!(data & 0x00000080); 44 u8 func = (data & 0x0000ff00) >> 8; 45 u8 unk0 = (data & 0x00ff0000) >> 16; 46 u8 unk1 = (data & 0x1f000000) >> 24; 47 48 if (func == 0xff) 49 continue; 50 51 gpio->set(gpio, 0, func, line, defs); 52 53 nv_mask(priv, 0x00d610 + (line * 4), 0xff, unk0); 54 if (unk1--) 55 nv_mask(priv, 0x00d740 + (unk1 * 4), 0xff, line); 56 } 57} 58 59static int 60nvd0_gpio_drive(struct nouveau_gpio *gpio, int line, int dir, int out) 61{ 62 u32 data = ((dir ^ 1) << 13) | (out << 12); 63 nv_mask(gpio, 0x00d610 + (line * 4), 0x00003000, data); 64 nv_mask(gpio, 0x00d604, 0x00000001, 0x00000001); /* update? */ 65 return 0; 66} 67 68static int 69nvd0_gpio_sense(struct nouveau_gpio *gpio, int line) 70{ 71 return !!(nv_rd32(gpio, 0x00d610 + (line * 4)) & 0x00004000); 72} 73 74static int 75nvd0_gpio_ctor(struct nouveau_object *parent, struct nouveau_object *engine, 76 struct nouveau_oclass *oclass, void *data, u32 size, 77 struct nouveau_object **pobject) 78{ 79 struct nvd0_gpio_priv *priv; 80 int ret; 81 82 ret = nouveau_gpio_create(parent, engine, oclass, &priv); 83 *pobject = nv_object(priv); 84 if (ret) 85 return ret; 86 87 priv->base.reset = nvd0_gpio_reset; 88 priv->base.drive = nvd0_gpio_drive; 89 priv->base.sense = nvd0_gpio_sense; 90 priv->base.irq_enable = nv50_gpio_irq_enable; 91 nv_subdev(priv)->intr = nv50_gpio_intr; 92 return 0; 93} 94 95struct nouveau_oclass 96nvd0_gpio_oclass = { 97 .handle = NV_SUBDEV(GPIO, 0xd0), 98 .ofuncs = &(struct nouveau_ofuncs) { 99 .ctor = nvd0_gpio_ctor, 100 .dtor = nv50_gpio_dtor, 101 .init = nv50_gpio_init, 102 .fini = nv50_gpio_fini, 103 }, 104}; 105