279 lines · c
1/*2 * Copyright 2013 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs <bskeggs@redhat.com>23 */24#define anx9805_pad(p) container_of((p), struct anx9805_pad, base)25#define anx9805_bus(p) container_of((p), struct anx9805_bus, base)26#define anx9805_aux(p) container_of((p), struct anx9805_aux, base)27#include "aux.h"28#include "bus.h"29 30struct anx9805_pad {31 struct nvkm_i2c_pad base;32 struct nvkm_i2c_bus *bus;33 u8 addr;34};35 36struct anx9805_bus {37 struct nvkm_i2c_bus base;38 struct anx9805_pad *pad;39 u8 addr;40};41 42static int43anx9805_bus_xfer(struct nvkm_i2c_bus *base, struct i2c_msg *msgs, int num)44{45 struct anx9805_bus *bus = anx9805_bus(base);46 struct anx9805_pad *pad = bus->pad;47 struct i2c_adapter *adap = &pad->bus->i2c;48 struct i2c_msg *msg = msgs;49 int ret = -ETIMEDOUT;50 int i, j, cnt = num;51 u8 seg = 0x00, off = 0x00, tmp;52 53 tmp = nvkm_rdi2cr(adap, pad->addr, 0x07) & ~0x10;54 nvkm_wri2cr(adap, pad->addr, 0x07, tmp | 0x10);55 nvkm_wri2cr(adap, pad->addr, 0x07, tmp);56 nvkm_wri2cr(adap, bus->addr, 0x43, 0x05);57 mdelay(5);58 59 while (cnt--) {60 if ( (msg->flags & I2C_M_RD) && msg->addr == 0x50) {61 nvkm_wri2cr(adap, bus->addr, 0x40, msg->addr << 1);62 nvkm_wri2cr(adap, bus->addr, 0x41, seg);63 nvkm_wri2cr(adap, bus->addr, 0x42, off);64 nvkm_wri2cr(adap, bus->addr, 0x44, msg->len);65 nvkm_wri2cr(adap, bus->addr, 0x45, 0x00);66 nvkm_wri2cr(adap, bus->addr, 0x43, 0x01);67 for (i = 0; i < msg->len; i++) {68 j = 0;69 while (nvkm_rdi2cr(adap, bus->addr, 0x46) & 0x10) {70 mdelay(5);71 if (j++ == 32)72 goto done;73 }74 msg->buf[i] = nvkm_rdi2cr(adap, bus->addr, 0x47);75 }76 } else77 if (!(msg->flags & I2C_M_RD)) {78 if (msg->addr == 0x50 && msg->len == 0x01) {79 off = msg->buf[0];80 } else81 if (msg->addr == 0x30 && msg->len == 0x01) {82 seg = msg->buf[0];83 } else84 goto done;85 } else {86 goto done;87 }88 msg++;89 }90 91 ret = num;92done:93 nvkm_wri2cr(adap, bus->addr, 0x43, 0x00);94 return ret;95}96 97static const struct nvkm_i2c_bus_func98anx9805_bus_func = {99 .xfer = anx9805_bus_xfer,100};101 102static int103anx9805_bus_new(struct nvkm_i2c_pad *base, int id, u8 drive,104 struct nvkm_i2c_bus **pbus)105{106 struct anx9805_pad *pad = anx9805_pad(base);107 struct anx9805_bus *bus;108 int ret;109 110 if (!(bus = kzalloc(sizeof(*bus), GFP_KERNEL)))111 return -ENOMEM;112 *pbus = &bus->base;113 bus->pad = pad;114 115 ret = nvkm_i2c_bus_ctor(&anx9805_bus_func, &pad->base, id, &bus->base);116 if (ret)117 return ret;118 119 switch (pad->addr) {120 case 0x39: bus->addr = 0x3d; break;121 case 0x3b: bus->addr = 0x3f; break;122 default:123 return -ENOSYS;124 }125 126 return 0;127}128 129struct anx9805_aux {130 struct nvkm_i2c_aux base;131 struct anx9805_pad *pad;132 u8 addr;133};134 135static int136anx9805_aux_xfer(struct nvkm_i2c_aux *base, bool retry,137 u8 type, u32 addr, u8 *data, u8 *size)138{139 struct anx9805_aux *aux = anx9805_aux(base);140 struct anx9805_pad *pad = aux->pad;141 struct i2c_adapter *adap = &pad->bus->i2c;142 int i, ret = -ETIMEDOUT;143 u8 buf[16] = {};144 u8 tmp;145 146 AUX_DBG(&aux->base, "%02x %05x %d", type, addr, *size);147 148 tmp = nvkm_rdi2cr(adap, pad->addr, 0x07) & ~0x04;149 nvkm_wri2cr(adap, pad->addr, 0x07, tmp | 0x04);150 nvkm_wri2cr(adap, pad->addr, 0x07, tmp);151 nvkm_wri2cr(adap, pad->addr, 0xf7, 0x01);152 153 nvkm_wri2cr(adap, aux->addr, 0xe4, 0x80);154 if (!(type & 1)) {155 memcpy(buf, data, *size);156 AUX_DBG(&aux->base, "%16ph", buf);157 for (i = 0; i < *size; i++)158 nvkm_wri2cr(adap, aux->addr, 0xf0 + i, buf[i]);159 }160 nvkm_wri2cr(adap, aux->addr, 0xe5, ((*size - 1) << 4) | type);161 nvkm_wri2cr(adap, aux->addr, 0xe6, (addr & 0x000ff) >> 0);162 nvkm_wri2cr(adap, aux->addr, 0xe7, (addr & 0x0ff00) >> 8);163 nvkm_wri2cr(adap, aux->addr, 0xe8, (addr & 0xf0000) >> 16);164 nvkm_wri2cr(adap, aux->addr, 0xe9, 0x01);165 166 i = 0;167 while ((tmp = nvkm_rdi2cr(adap, aux->addr, 0xe9)) & 0x01) {168 mdelay(5);169 if (i++ == 32)170 goto done;171 }172 173 if ((tmp = nvkm_rdi2cr(adap, pad->addr, 0xf7)) & 0x01) {174 ret = -EIO;175 goto done;176 }177 178 if (type & 1) {179 for (i = 0; i < *size; i++)180 buf[i] = nvkm_rdi2cr(adap, aux->addr, 0xf0 + i);181 AUX_DBG(&aux->base, "%16ph", buf);182 memcpy(data, buf, *size);183 }184 185 ret = 0;186done:187 nvkm_wri2cr(adap, pad->addr, 0xf7, 0x01);188 return ret;189}190 191static int192anx9805_aux_lnk_ctl(struct nvkm_i2c_aux *base,193 int link_nr, int link_bw, bool enh)194{195 struct anx9805_aux *aux = anx9805_aux(base);196 struct anx9805_pad *pad = aux->pad;197 struct i2c_adapter *adap = &pad->bus->i2c;198 u8 tmp, i;199 200 AUX_DBG(&aux->base, "ANX9805 train %d %02x %d",201 link_nr, link_bw, enh);202 203 nvkm_wri2cr(adap, aux->addr, 0xa0, link_bw);204 nvkm_wri2cr(adap, aux->addr, 0xa1, link_nr | (enh ? 0x80 : 0x00));205 nvkm_wri2cr(adap, aux->addr, 0xa2, 0x01);206 nvkm_wri2cr(adap, aux->addr, 0xa8, 0x01);207 208 i = 0;209 while ((tmp = nvkm_rdi2cr(adap, aux->addr, 0xa8)) & 0x01) {210 mdelay(5);211 if (i++ == 100) {212 AUX_ERR(&aux->base, "link training timeout");213 return -ETIMEDOUT;214 }215 }216 217 if (tmp & 0x70) {218 AUX_ERR(&aux->base, "link training failed");219 return -EIO;220 }221 222 return 0;223}224 225static const struct nvkm_i2c_aux_func226anx9805_aux_func = {227 .xfer = anx9805_aux_xfer,228 .lnk_ctl = anx9805_aux_lnk_ctl,229};230 231static int232anx9805_aux_new(struct nvkm_i2c_pad *base, int id, u8 drive,233 struct nvkm_i2c_aux **pbus)234{235 struct anx9805_pad *pad = anx9805_pad(base);236 struct anx9805_aux *aux;237 int ret;238 239 if (!(aux = kzalloc(sizeof(*aux), GFP_KERNEL)))240 return -ENOMEM;241 *pbus = &aux->base;242 aux->pad = pad;243 244 ret = nvkm_i2c_aux_ctor(&anx9805_aux_func, &pad->base, id, &aux->base);245 if (ret)246 return ret;247 248 switch (pad->addr) {249 case 0x39: aux->addr = 0x38; break;250 case 0x3b: aux->addr = 0x3c; break;251 default:252 return -ENOSYS;253 }254 255 return 0;256}257 258static const struct nvkm_i2c_pad_func259anx9805_pad_func = {260 .bus_new_4 = anx9805_bus_new,261 .aux_new_6 = anx9805_aux_new,262};263 264int265anx9805_pad_new(struct nvkm_i2c_bus *bus, int id, u8 addr,266 struct nvkm_i2c_pad **ppad)267{268 struct anx9805_pad *pad;269 270 if (!(pad = kzalloc(sizeof(*pad), GFP_KERNEL)))271 return -ENOMEM;272 *ppad = &pad->base;273 274 nvkm_i2c_pad_ctor(&anx9805_pad_func, bus->pad->i2c, id, &pad->base);275 pad->bus = bus;276 pad->addr = addr;277 return 0;278}279