1 /* 2 * Copyright 2012 Nouveau Community 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: Martin Peres <martin.peres@labri.fr> 23 * Ben Skeggs 24 */ 25 #include "priv.h" 26 27 #include <subdev/gpio.h> 28 29 static void 30 nv04_bus_intr(struct nvkm_bus *bus) 31 { 32 struct nvkm_subdev *subdev = &bus->subdev; 33 struct nvkm_device *device = subdev->device; 34 u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140); 35 36 if (stat & 0x00000001) { 37 nvkm_error(subdev, "BUS ERROR\n"); 38 stat &= ~0x00000001; 39 nvkm_wr32(device, 0x001100, 0x00000001); 40 } 41 42 if (stat & 0x00000110) { 43 struct nvkm_gpio *gpio = device->gpio; 44 if (gpio) 45 nvkm_subdev_intr(&gpio->subdev); 46 stat &= ~0x00000110; 47 nvkm_wr32(device, 0x001100, 0x00000110); 48 } 49 50 if (stat) { 51 nvkm_error(subdev, "intr %08x\n", stat); 52 nvkm_mask(device, 0x001140, stat, 0x00000000); 53 } 54 } 55 56 static void 57 nv04_bus_init(struct nvkm_bus *bus) 58 { 59 struct nvkm_device *device = bus->subdev.device; 60 nvkm_wr32(device, 0x001100, 0xffffffff); 61 nvkm_wr32(device, 0x001140, 0x00000111); 62 } 63 64 static const struct nvkm_bus_func 65 nv04_bus = { 66 .init = nv04_bus_init, 67 .intr = nv04_bus_intr, 68 }; 69 70 int 71 nv04_bus_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, 72 struct nvkm_bus **pbus) 73 { 74 return nvkm_bus_new_(&nv04_bus, device, type, inst, pbus); 75 } 76