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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | /* * Copyright 2015 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 busions 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 <bskeggs@redhat.com> */ #define nv50_i2c_bus(p) container_of((p), struct nv50_i2c_bus, base) #include "bus.h" #include <subdev/vga.h> struct nv50_i2c_bus { struct nvkm_i2c_bus base; u32 addr; u32 data; }; static void nv50_i2c_bus_drive_scl(struct nvkm_i2c_bus *base, int state) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; if (state) bus->data |= 0x01; else bus->data &= 0xfe; nvkm_wr32(device, bus->addr, bus->data); } static void nv50_i2c_bus_drive_sda(struct nvkm_i2c_bus *base, int state) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; if (state) bus->data |= 0x02; else bus->data &= 0xfd; nvkm_wr32(device, bus->addr, bus->data); } static int nv50_i2c_bus_sense_scl(struct nvkm_i2c_bus *base) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; return !!(nvkm_rd32(device, bus->addr) & 0x00000001); } static int nv50_i2c_bus_sense_sda(struct nvkm_i2c_bus *base) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; return !!(nvkm_rd32(device, bus->addr) & 0x00000002); } static void nv50_i2c_bus_init(struct nvkm_i2c_bus *base) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; nvkm_wr32(device, bus->addr, (bus->data = 0x00000007)); } static const struct nvkm_i2c_bus_func nv50_i2c_bus_func = { .init = nv50_i2c_bus_init, .drive_scl = nv50_i2c_bus_drive_scl, .drive_sda = nv50_i2c_bus_drive_sda, .sense_scl = nv50_i2c_bus_sense_scl, .sense_sda = nv50_i2c_bus_sense_sda, .xfer = nvkm_i2c_bit_xfer, }; int nv50_i2c_bus_new(struct nvkm_i2c_pad *pad, int id, u8 drive, struct nvkm_i2c_bus **pbus) { static const u32 addr[] = { 0x00e138, 0x00e150, 0x00e168, 0x00e180, 0x00e254, 0x00e274, 0x00e764, 0x00e780, 0x00e79c, 0x00e7b8 }; struct nv50_i2c_bus *bus; if (drive >= ARRAY_SIZE(addr)) { nvkm_warn(&pad->i2c->subdev, "bus %d unknown\n", drive); return -ENODEV; } if (!(bus = kzalloc(sizeof(*bus), GFP_KERNEL))) return -ENOMEM; *pbus = &bus->base; nvkm_i2c_bus_ctor(&nv50_i2c_bus_func, pad, id, &bus->base); bus->addr = addr[drive]; bus->data = 0x00000007; return 0; } |