1 /*
2 * Copyright 2013 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 "priv.h"
25 #include "aux.h"
26 #include "bus.h"
27 #include "pad.h"
28
29 #include <core/notify.h>
30 #include <core/option.h>
31 #include <subdev/bios.h>
32 #include <subdev/bios/dcb.h>
33 #include <subdev/bios/i2c.h>
34
35 static struct nvkm_i2c_pad *
nvkm_i2c_pad_find(struct nvkm_i2c * i2c,int id)36 nvkm_i2c_pad_find(struct nvkm_i2c *i2c, int id)
37 {
38 struct nvkm_i2c_pad *pad;
39
40 list_for_each_entry(pad, &i2c->pad, head) {
41 if (pad->id == id)
42 return pad;
43 }
44
45 return NULL;
46 }
47
48 struct nvkm_i2c_bus *
nvkm_i2c_bus_find(struct nvkm_i2c * i2c,int id)49 nvkm_i2c_bus_find(struct nvkm_i2c *i2c, int id)
50 {
51 struct nvkm_bios *bios = i2c->subdev.device->bios;
52 struct nvkm_i2c_bus *bus;
53
54 if (id == NVKM_I2C_BUS_PRI || id == NVKM_I2C_BUS_SEC) {
55 u8 ver, hdr, cnt, len;
56 u16 i2c = dcb_i2c_table(bios, &ver, &hdr, &cnt, &len);
57 if (i2c && ver >= 0x30) {
58 u8 auxidx = nvbios_rd08(bios, i2c + 4);
59 if (id == NVKM_I2C_BUS_PRI)
60 id = NVKM_I2C_BUS_CCB((auxidx & 0x0f) >> 0);
61 else
62 id = NVKM_I2C_BUS_CCB((auxidx & 0xf0) >> 4);
63 } else {
64 id = NVKM_I2C_BUS_CCB(2);
65 }
66 }
67
68 list_for_each_entry(bus, &i2c->bus, head) {
69 if (bus->id == id)
70 return bus;
71 }
72
73 return NULL;
74 }
75
76 struct nvkm_i2c_aux *
nvkm_i2c_aux_find(struct nvkm_i2c * i2c,int id)77 nvkm_i2c_aux_find(struct nvkm_i2c *i2c, int id)
78 {
79 struct nvkm_i2c_aux *aux;
80
81 list_for_each_entry(aux, &i2c->aux, head) {
82 if (aux->id == id)
83 return aux;
84 }
85
86 return NULL;
87 }
88
89 static void
nvkm_i2c_intr_fini(struct nvkm_event * event,int type,int id)90 nvkm_i2c_intr_fini(struct nvkm_event *event, int type, int id)
91 {
92 struct nvkm_i2c *i2c = container_of(event, typeof(*i2c), event);
93 struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, id);
94 if (aux)
95 i2c->func->aux_mask(i2c, type, aux->intr, 0);
96 }
97
98 static void
nvkm_i2c_intr_init(struct nvkm_event * event,int type,int id)99 nvkm_i2c_intr_init(struct nvkm_event *event, int type, int id)
100 {
101 struct nvkm_i2c *i2c = container_of(event, typeof(*i2c), event);
102 struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, id);
103 if (aux)
104 i2c->func->aux_mask(i2c, type, aux->intr, aux->intr);
105 }
106
107 static int
nvkm_i2c_intr_ctor(struct nvkm_object * object,void * data,u32 size,struct nvkm_notify * notify)108 nvkm_i2c_intr_ctor(struct nvkm_object *object, void *data, u32 size,
109 struct nvkm_notify *notify)
110 {
111 struct nvkm_i2c_ntfy_req *req = data;
112 if (!WARN_ON(size != sizeof(*req))) {
113 notify->size = sizeof(struct nvkm_i2c_ntfy_rep);
114 notify->types = req->mask;
115 notify->index = req->port;
116 return 0;
117 }
118 return -EINVAL;
119 }
120
121 static const struct nvkm_event_func
122 nvkm_i2c_intr_func = {
123 .ctor = nvkm_i2c_intr_ctor,
124 .init = nvkm_i2c_intr_init,
125 .fini = nvkm_i2c_intr_fini,
126 };
127
128 static void
nvkm_i2c_intr(struct nvkm_subdev * subdev)129 nvkm_i2c_intr(struct nvkm_subdev *subdev)
130 {
131 struct nvkm_i2c *i2c = nvkm_i2c(subdev);
132 struct nvkm_i2c_aux *aux;
133 u32 hi, lo, rq, tx;
134
135 if (!i2c->func->aux_stat)
136 return;
137
138 i2c->func->aux_stat(i2c, &hi, &lo, &rq, &tx);
139 if (!hi && !lo && !rq && !tx)
140 return;
141
142 list_for_each_entry(aux, &i2c->aux, head) {
143 u32 mask = 0;
144 if (hi & aux->intr) mask |= NVKM_I2C_PLUG;
145 if (lo & aux->intr) mask |= NVKM_I2C_UNPLUG;
146 if (rq & aux->intr) mask |= NVKM_I2C_IRQ;
147 if (tx & aux->intr) mask |= NVKM_I2C_DONE;
148 if (mask) {
149 struct nvkm_i2c_ntfy_rep rep = {
150 .mask = mask,
151 };
152 nvkm_event_send(&i2c->event, rep.mask, aux->id,
153 &rep, sizeof(rep));
154 }
155 }
156 }
157
158 static int
nvkm_i2c_fini(struct nvkm_subdev * subdev,bool suspend)159 nvkm_i2c_fini(struct nvkm_subdev *subdev, bool suspend)
160 {
161 struct nvkm_i2c *i2c = nvkm_i2c(subdev);
162 struct nvkm_i2c_pad *pad;
163 u32 mask;
164
165 if ((mask = (1 << i2c->func->aux) - 1), i2c->func->aux_stat) {
166 i2c->func->aux_mask(i2c, NVKM_I2C_ANY, mask, 0);
167 i2c->func->aux_stat(i2c, &mask, &mask, &mask, &mask);
168 }
169
170 list_for_each_entry(pad, &i2c->pad, head) {
171 nvkm_i2c_pad_fini(pad);
172 }
173
174 return 0;
175 }
176
177 static int
nvkm_i2c_init(struct nvkm_subdev * subdev)178 nvkm_i2c_init(struct nvkm_subdev *subdev)
179 {
180 struct nvkm_i2c *i2c = nvkm_i2c(subdev);
181 struct nvkm_i2c_bus *bus;
182 struct nvkm_i2c_pad *pad;
183
184 list_for_each_entry(pad, &i2c->pad, head) {
185 nvkm_i2c_pad_init(pad);
186 }
187
188 list_for_each_entry(bus, &i2c->bus, head) {
189 nvkm_i2c_bus_init(bus);
190 }
191
192 return 0;
193 }
194
195 static void *
nvkm_i2c_dtor(struct nvkm_subdev * subdev)196 nvkm_i2c_dtor(struct nvkm_subdev *subdev)
197 {
198 struct nvkm_i2c *i2c = nvkm_i2c(subdev);
199
200 nvkm_event_fini(&i2c->event);
201
202 while (!list_empty(&i2c->aux)) {
203 struct nvkm_i2c_aux *aux =
204 list_first_entry(&i2c->aux, typeof(*aux), head);
205 nvkm_i2c_aux_del(&aux);
206 }
207
208 while (!list_empty(&i2c->bus)) {
209 struct nvkm_i2c_bus *bus =
210 list_first_entry(&i2c->bus, typeof(*bus), head);
211 nvkm_i2c_bus_del(&bus);
212 }
213
214 while (!list_empty(&i2c->pad)) {
215 struct nvkm_i2c_pad *pad =
216 list_first_entry(&i2c->pad, typeof(*pad), head);
217 nvkm_i2c_pad_del(&pad);
218 }
219
220 return i2c;
221 }
222
223 static const struct nvkm_subdev_func
224 nvkm_i2c = {
225 .dtor = nvkm_i2c_dtor,
226 .init = nvkm_i2c_init,
227 .fini = nvkm_i2c_fini,
228 .intr = nvkm_i2c_intr,
229 };
230
231 static const struct nvkm_i2c_drv {
232 u8 bios;
233 u8 addr;
234 int (*pad_new)(struct nvkm_i2c_bus *, int id, u8 addr,
235 struct nvkm_i2c_pad **);
236 }
237 nvkm_i2c_drv[] = {
238 { 0x0d, 0x39, anx9805_pad_new },
239 { 0x0e, 0x3b, anx9805_pad_new },
240 {}
241 };
242
243 int
nvkm_i2c_new_(const struct nvkm_i2c_func * func,struct nvkm_device * device,int index,struct nvkm_i2c ** pi2c)244 nvkm_i2c_new_(const struct nvkm_i2c_func *func, struct nvkm_device *device,
245 int index, struct nvkm_i2c **pi2c)
246 {
247 struct nvkm_bios *bios = device->bios;
248 struct nvkm_i2c *i2c;
249 struct dcb_i2c_entry ccbE;
250 struct dcb_output dcbE;
251 u8 ver, hdr;
252 int ret, i;
253
254 if (!(i2c = *pi2c = kzalloc(sizeof(*i2c), GFP_KERNEL)))
255 return -ENOMEM;
256
257 nvkm_subdev_ctor(&nvkm_i2c, device, index, &i2c->subdev);
258 i2c->func = func;
259 INIT_LIST_HEAD(&i2c->pad);
260 INIT_LIST_HEAD(&i2c->bus);
261 INIT_LIST_HEAD(&i2c->aux);
262
263 i = -1;
264 while (!dcb_i2c_parse(bios, ++i, &ccbE)) {
265 struct nvkm_i2c_pad *pad = NULL;
266 struct nvkm_i2c_bus *bus = NULL;
267 struct nvkm_i2c_aux *aux = NULL;
268
269 nvkm_debug(&i2c->subdev, "ccb %02x: type %02x drive %02x "
270 "sense %02x share %02x auxch %02x\n", i, ccbE.type,
271 ccbE.drive, ccbE.sense, ccbE.share, ccbE.auxch);
272
273 if (ccbE.share != DCB_I2C_UNUSED) {
274 const int id = NVKM_I2C_PAD_HYBRID(ccbE.share);
275 if (!(pad = nvkm_i2c_pad_find(i2c, id)))
276 ret = func->pad_s_new(i2c, id, &pad);
277 else
278 ret = 0;
279 } else {
280 ret = func->pad_x_new(i2c, NVKM_I2C_PAD_CCB(i), &pad);
281 }
282
283 if (ret) {
284 nvkm_error(&i2c->subdev, "ccb %02x pad, %d\n", i, ret);
285 nvkm_i2c_pad_del(&pad);
286 continue;
287 }
288
289 if (pad->func->bus_new_0 && ccbE.type == DCB_I2C_NV04_BIT) {
290 ret = pad->func->bus_new_0(pad, NVKM_I2C_BUS_CCB(i),
291 ccbE.drive,
292 ccbE.sense, &bus);
293 } else
294 if (pad->func->bus_new_4 &&
295 ( ccbE.type == DCB_I2C_NV4E_BIT ||
296 ccbE.type == DCB_I2C_NVIO_BIT ||
297 (ccbE.type == DCB_I2C_PMGR &&
298 ccbE.drive != DCB_I2C_UNUSED))) {
299 ret = pad->func->bus_new_4(pad, NVKM_I2C_BUS_CCB(i),
300 ccbE.drive, &bus);
301 }
302
303 if (ret) {
304 nvkm_error(&i2c->subdev, "ccb %02x bus, %d\n", i, ret);
305 nvkm_i2c_bus_del(&bus);
306 }
307
308 if (pad->func->aux_new_6 &&
309 ( ccbE.type == DCB_I2C_NVIO_AUX ||
310 (ccbE.type == DCB_I2C_PMGR &&
311 ccbE.auxch != DCB_I2C_UNUSED))) {
312 ret = pad->func->aux_new_6(pad, NVKM_I2C_BUS_CCB(i),
313 ccbE.auxch, &aux);
314 } else {
315 ret = 0;
316 }
317
318 if (ret) {
319 nvkm_error(&i2c->subdev, "ccb %02x aux, %d\n", i, ret);
320 nvkm_i2c_aux_del(&aux);
321 }
322
323 if (ccbE.type != DCB_I2C_UNUSED && !bus && !aux) {
324 nvkm_warn(&i2c->subdev, "ccb %02x was ignored\n", i);
325 continue;
326 }
327 }
328
329 i = -1;
330 while (dcb_outp_parse(bios, ++i, &ver, &hdr, &dcbE)) {
331 const struct nvkm_i2c_drv *drv = nvkm_i2c_drv;
332 struct nvkm_i2c_bus *bus;
333 struct nvkm_i2c_pad *pad;
334
335 /* internal outputs handled by native i2c busses (above) */
336 if (!dcbE.location)
337 continue;
338
339 /* we need an i2c bus to talk to the external encoder */
340 bus = nvkm_i2c_bus_find(i2c, dcbE.i2c_index);
341 if (!bus) {
342 nvkm_debug(&i2c->subdev, "dcb %02x no bus\n", i);
343 continue;
344 }
345
346 /* ... and a driver for it */
347 while (drv->pad_new) {
348 if (drv->bios == dcbE.extdev)
349 break;
350 drv++;
351 }
352
353 if (!drv->pad_new) {
354 nvkm_debug(&i2c->subdev, "dcb %02x drv %02x unknown\n",
355 i, dcbE.extdev);
356 continue;
357 }
358
359 /* find/create an instance of the driver */
360 pad = nvkm_i2c_pad_find(i2c, NVKM_I2C_PAD_EXT(dcbE.extdev));
361 if (!pad) {
362 const int id = NVKM_I2C_PAD_EXT(dcbE.extdev);
363 ret = drv->pad_new(bus, id, drv->addr, &pad);
364 if (ret) {
365 nvkm_error(&i2c->subdev, "dcb %02x pad, %d\n",
366 i, ret);
367 nvkm_i2c_pad_del(&pad);
368 continue;
369 }
370 }
371
372 /* create any i2c bus / aux channel required by the output */
373 if (pad->func->aux_new_6 && dcbE.type == DCB_OUTPUT_DP) {
374 const int id = NVKM_I2C_AUX_EXT(dcbE.extdev);
375 struct nvkm_i2c_aux *aux = NULL;
376 ret = pad->func->aux_new_6(pad, id, 0, &aux);
377 if (ret) {
378 nvkm_error(&i2c->subdev, "dcb %02x aux, %d\n",
379 i, ret);
380 nvkm_i2c_aux_del(&aux);
381 }
382 } else
383 if (pad->func->bus_new_4) {
384 const int id = NVKM_I2C_BUS_EXT(dcbE.extdev);
385 struct nvkm_i2c_bus *bus = NULL;
386 ret = pad->func->bus_new_4(pad, id, 0, &bus);
387 if (ret) {
388 nvkm_error(&i2c->subdev, "dcb %02x bus, %d\n",
389 i, ret);
390 nvkm_i2c_bus_del(&bus);
391 }
392 }
393 }
394
395 return nvkm_event_init(&nvkm_i2c_intr_func, 4, i, &i2c->event);
396 }
397
