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 #include "nv50.h" 25 26 void 27 nv50_i2c_drive_scl(struct nvkm_i2c_port *base, int state) 28 { 29 struct nvkm_i2c *i2c = (void *)nvkm_i2c(base); 30 struct nv50_i2c_port *port = (void *)base; 31 if (state) port->state |= 0x01; 32 else port->state &= 0xfe; 33 nv_wr32(i2c, port->addr, port->state); 34 } 35 36 void 37 nv50_i2c_drive_sda(struct nvkm_i2c_port *base, int state) 38 { 39 struct nvkm_i2c *i2c = (void *)nvkm_i2c(base); 40 struct nv50_i2c_port *port = (void *)base; 41 if (state) port->state |= 0x02; 42 else port->state &= 0xfd; 43 nv_wr32(i2c, port->addr, port->state); 44 } 45 46 int 47 nv50_i2c_sense_scl(struct nvkm_i2c_port *base) 48 { 49 struct nvkm_i2c *i2c = (void *)nvkm_i2c(base); 50 struct nv50_i2c_port *port = (void *)base; 51 return !!(nv_rd32(i2c, port->addr) & 0x00000001); 52 } 53 54 int 55 nv50_i2c_sense_sda(struct nvkm_i2c_port *base) 56 { 57 struct nvkm_i2c *i2c = (void *)nvkm_i2c(base); 58 struct nv50_i2c_port *port = (void *)base; 59 return !!(nv_rd32(i2c, port->addr) & 0x00000002); 60 } 61 62 static const struct nvkm_i2c_func 63 nv50_i2c_func = { 64 .drive_scl = nv50_i2c_drive_scl, 65 .drive_sda = nv50_i2c_drive_sda, 66 .sense_scl = nv50_i2c_sense_scl, 67 .sense_sda = nv50_i2c_sense_sda, 68 }; 69 70 const u32 nv50_i2c_addr[] = { 71 0x00e138, 0x00e150, 0x00e168, 0x00e180, 72 0x00e254, 0x00e274, 0x00e764, 0x00e780, 73 0x00e79c, 0x00e7b8 74 }; 75 const int nv50_i2c_addr_nr = ARRAY_SIZE(nv50_i2c_addr); 76 77 static int 78 nv50_i2c_port_ctor(struct nvkm_object *parent, struct nvkm_object *engine, 79 struct nvkm_oclass *oclass, void *data, u32 index, 80 struct nvkm_object **pobject) 81 { 82 struct dcb_i2c_entry *info = data; 83 struct nv50_i2c_port *port; 84 int ret; 85 86 ret = nvkm_i2c_port_create(parent, engine, oclass, index, 87 &nvkm_i2c_bit_algo, &nv50_i2c_func, &port); 88 *pobject = nv_object(port); 89 if (ret) 90 return ret; 91 92 if (info->drive >= nv50_i2c_addr_nr) 93 return -EINVAL; 94 95 port->state = 0x00000007; 96 port->addr = nv50_i2c_addr[info->drive]; 97 return 0; 98 } 99 100 int 101 nv50_i2c_port_init(struct nvkm_object *object) 102 { 103 struct nvkm_i2c *i2c = (void *)nvkm_i2c(object); 104 struct nv50_i2c_port *port = (void *)object; 105 nv_wr32(i2c, port->addr, port->state); 106 return nvkm_i2c_port_init(&port->base); 107 } 108 109 static struct nvkm_oclass 110 nv50_i2c_sclass[] = { 111 { .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NVIO_BIT), 112 .ofuncs = &(struct nvkm_ofuncs) { 113 .ctor = nv50_i2c_port_ctor, 114 .dtor = _nvkm_i2c_port_dtor, 115 .init = nv50_i2c_port_init, 116 .fini = _nvkm_i2c_port_fini, 117 }, 118 }, 119 {} 120 }; 121 122 struct nvkm_oclass * 123 nv50_i2c_oclass = &(struct nvkm_i2c_impl) { 124 .base.handle = NV_SUBDEV(I2C, 0x50), 125 .base.ofuncs = &(struct nvkm_ofuncs) { 126 .ctor = _nvkm_i2c_ctor, 127 .dtor = _nvkm_i2c_dtor, 128 .init = _nvkm_i2c_init, 129 .fini = _nvkm_i2c_fini, 130 }, 131 .sclass = nv50_i2c_sclass, 132 .pad_x = &nv04_i2c_pad_oclass, 133 }.base; 134