Loading...
1/*
2 * Copyright 2007-8 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors: Dave Airlie
24 * Alex Deucher
25 */
26#include "drmP.h"
27#include "radeon_drm.h"
28#include "radeon.h"
29#include "atom.h"
30
31/**
32 * radeon_ddc_probe
33 *
34 */
35bool radeon_ddc_probe(struct radeon_connector *radeon_connector, bool requires_extended_probe)
36{
37 u8 out = 0x0;
38 u8 buf[8];
39 int ret;
40 struct i2c_msg msgs[] = {
41 {
42 .addr = 0x50,
43 .flags = 0,
44 .len = 1,
45 .buf = &out,
46 },
47 {
48 .addr = 0x50,
49 .flags = I2C_M_RD,
50 .len = 1,
51 .buf = buf,
52 }
53 };
54
55 /* Read 8 bytes from i2c for extended probe of EDID header */
56 if (requires_extended_probe)
57 msgs[1].len = 8;
58
59 /* on hw with routers, select right port */
60 if (radeon_connector->router.ddc_valid)
61 radeon_router_select_ddc_port(radeon_connector);
62
63 ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2);
64 if (ret != 2)
65 /* Couldn't find an accessible DDC on this connector */
66 return false;
67 if (requires_extended_probe) {
68 /* Probe also for valid EDID header
69 * EDID header starts with:
70 * 0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00.
71 * Only the first 6 bytes must be valid as
72 * drm_edid_block_valid() can fix the last 2 bytes */
73 if (drm_edid_header_is_valid(buf) < 6) {
74 /* Couldn't find an accessible EDID on this
75 * connector */
76 return false;
77 }
78 }
79 return true;
80}
81
82/* bit banging i2c */
83
84static void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state)
85{
86 struct radeon_device *rdev = i2c->dev->dev_private;
87 struct radeon_i2c_bus_rec *rec = &i2c->rec;
88 uint32_t temp;
89
90 /* RV410 appears to have a bug where the hw i2c in reset
91 * holds the i2c port in a bad state - switch hw i2c away before
92 * doing DDC - do this for all r200s/r300s/r400s for safety sake
93 */
94 if (rec->hw_capable) {
95 if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) {
96 u32 reg;
97
98 if (rdev->family >= CHIP_RV350)
99 reg = RADEON_GPIO_MONID;
100 else if ((rdev->family == CHIP_R300) ||
101 (rdev->family == CHIP_R350))
102 reg = RADEON_GPIO_DVI_DDC;
103 else
104 reg = RADEON_GPIO_CRT2_DDC;
105
106 mutex_lock(&rdev->dc_hw_i2c_mutex);
107 if (rec->a_clk_reg == reg) {
108 WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
109 R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1)));
110 } else {
111 WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
112 R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3)));
113 }
114 mutex_unlock(&rdev->dc_hw_i2c_mutex);
115 }
116 }
117
118 /* switch the pads to ddc mode */
119 if (ASIC_IS_DCE3(rdev) && rec->hw_capable) {
120 temp = RREG32(rec->mask_clk_reg);
121 temp &= ~(1 << 16);
122 WREG32(rec->mask_clk_reg, temp);
123 }
124
125 /* clear the output pin values */
126 temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask;
127 WREG32(rec->a_clk_reg, temp);
128
129 temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask;
130 WREG32(rec->a_data_reg, temp);
131
132 /* set the pins to input */
133 temp = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;
134 WREG32(rec->en_clk_reg, temp);
135
136 temp = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
137 WREG32(rec->en_data_reg, temp);
138
139 /* mask the gpio pins for software use */
140 temp = RREG32(rec->mask_clk_reg);
141 if (lock_state)
142 temp |= rec->mask_clk_mask;
143 else
144 temp &= ~rec->mask_clk_mask;
145 WREG32(rec->mask_clk_reg, temp);
146 temp = RREG32(rec->mask_clk_reg);
147
148 temp = RREG32(rec->mask_data_reg);
149 if (lock_state)
150 temp |= rec->mask_data_mask;
151 else
152 temp &= ~rec->mask_data_mask;
153 WREG32(rec->mask_data_reg, temp);
154 temp = RREG32(rec->mask_data_reg);
155}
156
157static int get_clock(void *i2c_priv)
158{
159 struct radeon_i2c_chan *i2c = i2c_priv;
160 struct radeon_device *rdev = i2c->dev->dev_private;
161 struct radeon_i2c_bus_rec *rec = &i2c->rec;
162 uint32_t val;
163
164 /* read the value off the pin */
165 val = RREG32(rec->y_clk_reg);
166 val &= rec->y_clk_mask;
167
168 return (val != 0);
169}
170
171
172static int get_data(void *i2c_priv)
173{
174 struct radeon_i2c_chan *i2c = i2c_priv;
175 struct radeon_device *rdev = i2c->dev->dev_private;
176 struct radeon_i2c_bus_rec *rec = &i2c->rec;
177 uint32_t val;
178
179 /* read the value off the pin */
180 val = RREG32(rec->y_data_reg);
181 val &= rec->y_data_mask;
182
183 return (val != 0);
184}
185
186static void set_clock(void *i2c_priv, int clock)
187{
188 struct radeon_i2c_chan *i2c = i2c_priv;
189 struct radeon_device *rdev = i2c->dev->dev_private;
190 struct radeon_i2c_bus_rec *rec = &i2c->rec;
191 uint32_t val;
192
193 /* set pin direction */
194 val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;
195 val |= clock ? 0 : rec->en_clk_mask;
196 WREG32(rec->en_clk_reg, val);
197}
198
199static void set_data(void *i2c_priv, int data)
200{
201 struct radeon_i2c_chan *i2c = i2c_priv;
202 struct radeon_device *rdev = i2c->dev->dev_private;
203 struct radeon_i2c_bus_rec *rec = &i2c->rec;
204 uint32_t val;
205
206 /* set pin direction */
207 val = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
208 val |= data ? 0 : rec->en_data_mask;
209 WREG32(rec->en_data_reg, val);
210}
211
212static int pre_xfer(struct i2c_adapter *i2c_adap)
213{
214 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
215
216 radeon_i2c_do_lock(i2c, 1);
217
218 return 0;
219}
220
221static void post_xfer(struct i2c_adapter *i2c_adap)
222{
223 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
224
225 radeon_i2c_do_lock(i2c, 0);
226}
227
228/* hw i2c */
229
230static u32 radeon_get_i2c_prescale(struct radeon_device *rdev)
231{
232 u32 sclk = rdev->pm.current_sclk;
233 u32 prescale = 0;
234 u32 nm;
235 u8 n, m, loop;
236 int i2c_clock;
237
238 switch (rdev->family) {
239 case CHIP_R100:
240 case CHIP_RV100:
241 case CHIP_RS100:
242 case CHIP_RV200:
243 case CHIP_RS200:
244 case CHIP_R200:
245 case CHIP_RV250:
246 case CHIP_RS300:
247 case CHIP_RV280:
248 case CHIP_R300:
249 case CHIP_R350:
250 case CHIP_RV350:
251 i2c_clock = 60;
252 nm = (sclk * 10) / (i2c_clock * 4);
253 for (loop = 1; loop < 255; loop++) {
254 if ((nm / loop) < loop)
255 break;
256 }
257 n = loop - 1;
258 m = loop - 2;
259 prescale = m | (n << 8);
260 break;
261 case CHIP_RV380:
262 case CHIP_RS400:
263 case CHIP_RS480:
264 case CHIP_R420:
265 case CHIP_R423:
266 case CHIP_RV410:
267 prescale = (((sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128;
268 break;
269 case CHIP_RS600:
270 case CHIP_RS690:
271 case CHIP_RS740:
272 /* todo */
273 break;
274 case CHIP_RV515:
275 case CHIP_R520:
276 case CHIP_RV530:
277 case CHIP_RV560:
278 case CHIP_RV570:
279 case CHIP_R580:
280 i2c_clock = 50;
281 if (rdev->family == CHIP_R520)
282 prescale = (127 << 8) + ((sclk * 10) / (4 * 127 * i2c_clock));
283 else
284 prescale = (((sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128;
285 break;
286 case CHIP_R600:
287 case CHIP_RV610:
288 case CHIP_RV630:
289 case CHIP_RV670:
290 /* todo */
291 break;
292 case CHIP_RV620:
293 case CHIP_RV635:
294 case CHIP_RS780:
295 case CHIP_RS880:
296 case CHIP_RV770:
297 case CHIP_RV730:
298 case CHIP_RV710:
299 case CHIP_RV740:
300 /* todo */
301 break;
302 case CHIP_CEDAR:
303 case CHIP_REDWOOD:
304 case CHIP_JUNIPER:
305 case CHIP_CYPRESS:
306 case CHIP_HEMLOCK:
307 /* todo */
308 break;
309 default:
310 DRM_ERROR("i2c: unhandled radeon chip\n");
311 break;
312 }
313 return prescale;
314}
315
316
317/* hw i2c engine for r1xx-4xx hardware
318 * hw can buffer up to 15 bytes
319 */
320static int r100_hw_i2c_xfer(struct i2c_adapter *i2c_adap,
321 struct i2c_msg *msgs, int num)
322{
323 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
324 struct radeon_device *rdev = i2c->dev->dev_private;
325 struct radeon_i2c_bus_rec *rec = &i2c->rec;
326 struct i2c_msg *p;
327 int i, j, k, ret = num;
328 u32 prescale;
329 u32 i2c_cntl_0, i2c_cntl_1, i2c_data;
330 u32 tmp, reg;
331
332 mutex_lock(&rdev->dc_hw_i2c_mutex);
333 /* take the pm lock since we need a constant sclk */
334 mutex_lock(&rdev->pm.mutex);
335
336 prescale = radeon_get_i2c_prescale(rdev);
337
338 reg = ((prescale << RADEON_I2C_PRESCALE_SHIFT) |
339 RADEON_I2C_DRIVE_EN |
340 RADEON_I2C_START |
341 RADEON_I2C_STOP |
342 RADEON_I2C_GO);
343
344 if (rdev->is_atom_bios) {
345 tmp = RREG32(RADEON_BIOS_6_SCRATCH);
346 WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE);
347 }
348
349 if (rec->mm_i2c) {
350 i2c_cntl_0 = RADEON_I2C_CNTL_0;
351 i2c_cntl_1 = RADEON_I2C_CNTL_1;
352 i2c_data = RADEON_I2C_DATA;
353 } else {
354 i2c_cntl_0 = RADEON_DVI_I2C_CNTL_0;
355 i2c_cntl_1 = RADEON_DVI_I2C_CNTL_1;
356 i2c_data = RADEON_DVI_I2C_DATA;
357
358 switch (rdev->family) {
359 case CHIP_R100:
360 case CHIP_RV100:
361 case CHIP_RS100:
362 case CHIP_RV200:
363 case CHIP_RS200:
364 case CHIP_RS300:
365 switch (rec->mask_clk_reg) {
366 case RADEON_GPIO_DVI_DDC:
367 /* no gpio select bit */
368 break;
369 default:
370 DRM_ERROR("gpio not supported with hw i2c\n");
371 ret = -EINVAL;
372 goto done;
373 }
374 break;
375 case CHIP_R200:
376 /* only bit 4 on r200 */
377 switch (rec->mask_clk_reg) {
378 case RADEON_GPIO_DVI_DDC:
379 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
380 break;
381 case RADEON_GPIO_MONID:
382 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
383 break;
384 default:
385 DRM_ERROR("gpio not supported with hw i2c\n");
386 ret = -EINVAL;
387 goto done;
388 }
389 break;
390 case CHIP_RV250:
391 case CHIP_RV280:
392 /* bits 3 and 4 */
393 switch (rec->mask_clk_reg) {
394 case RADEON_GPIO_DVI_DDC:
395 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
396 break;
397 case RADEON_GPIO_VGA_DDC:
398 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2);
399 break;
400 case RADEON_GPIO_CRT2_DDC:
401 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
402 break;
403 default:
404 DRM_ERROR("gpio not supported with hw i2c\n");
405 ret = -EINVAL;
406 goto done;
407 }
408 break;
409 case CHIP_R300:
410 case CHIP_R350:
411 /* only bit 4 on r300/r350 */
412 switch (rec->mask_clk_reg) {
413 case RADEON_GPIO_VGA_DDC:
414 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
415 break;
416 case RADEON_GPIO_DVI_DDC:
417 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
418 break;
419 default:
420 DRM_ERROR("gpio not supported with hw i2c\n");
421 ret = -EINVAL;
422 goto done;
423 }
424 break;
425 case CHIP_RV350:
426 case CHIP_RV380:
427 case CHIP_R420:
428 case CHIP_R423:
429 case CHIP_RV410:
430 case CHIP_RS400:
431 case CHIP_RS480:
432 /* bits 3 and 4 */
433 switch (rec->mask_clk_reg) {
434 case RADEON_GPIO_VGA_DDC:
435 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
436 break;
437 case RADEON_GPIO_DVI_DDC:
438 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2);
439 break;
440 case RADEON_GPIO_MONID:
441 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
442 break;
443 default:
444 DRM_ERROR("gpio not supported with hw i2c\n");
445 ret = -EINVAL;
446 goto done;
447 }
448 break;
449 default:
450 DRM_ERROR("unsupported asic\n");
451 ret = -EINVAL;
452 goto done;
453 break;
454 }
455 }
456
457 /* check for bus probe */
458 p = &msgs[0];
459 if ((num == 1) && (p->len == 0)) {
460 WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
461 RADEON_I2C_NACK |
462 RADEON_I2C_HALT |
463 RADEON_I2C_SOFT_RST));
464 WREG32(i2c_data, (p->addr << 1) & 0xff);
465 WREG32(i2c_data, 0);
466 WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) |
467 (1 << RADEON_I2C_ADDR_COUNT_SHIFT) |
468 RADEON_I2C_EN |
469 (48 << RADEON_I2C_TIME_LIMIT_SHIFT)));
470 WREG32(i2c_cntl_0, reg);
471 for (k = 0; k < 32; k++) {
472 udelay(10);
473 tmp = RREG32(i2c_cntl_0);
474 if (tmp & RADEON_I2C_GO)
475 continue;
476 tmp = RREG32(i2c_cntl_0);
477 if (tmp & RADEON_I2C_DONE)
478 break;
479 else {
480 DRM_DEBUG("i2c write error 0x%08x\n", tmp);
481 WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT);
482 ret = -EIO;
483 goto done;
484 }
485 }
486 goto done;
487 }
488
489 for (i = 0; i < num; i++) {
490 p = &msgs[i];
491 for (j = 0; j < p->len; j++) {
492 if (p->flags & I2C_M_RD) {
493 WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
494 RADEON_I2C_NACK |
495 RADEON_I2C_HALT |
496 RADEON_I2C_SOFT_RST));
497 WREG32(i2c_data, ((p->addr << 1) & 0xff) | 0x1);
498 WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) |
499 (1 << RADEON_I2C_ADDR_COUNT_SHIFT) |
500 RADEON_I2C_EN |
501 (48 << RADEON_I2C_TIME_LIMIT_SHIFT)));
502 WREG32(i2c_cntl_0, reg | RADEON_I2C_RECEIVE);
503 for (k = 0; k < 32; k++) {
504 udelay(10);
505 tmp = RREG32(i2c_cntl_0);
506 if (tmp & RADEON_I2C_GO)
507 continue;
508 tmp = RREG32(i2c_cntl_0);
509 if (tmp & RADEON_I2C_DONE)
510 break;
511 else {
512 DRM_DEBUG("i2c read error 0x%08x\n", tmp);
513 WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT);
514 ret = -EIO;
515 goto done;
516 }
517 }
518 p->buf[j] = RREG32(i2c_data) & 0xff;
519 } else {
520 WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
521 RADEON_I2C_NACK |
522 RADEON_I2C_HALT |
523 RADEON_I2C_SOFT_RST));
524 WREG32(i2c_data, (p->addr << 1) & 0xff);
525 WREG32(i2c_data, p->buf[j]);
526 WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) |
527 (1 << RADEON_I2C_ADDR_COUNT_SHIFT) |
528 RADEON_I2C_EN |
529 (48 << RADEON_I2C_TIME_LIMIT_SHIFT)));
530 WREG32(i2c_cntl_0, reg);
531 for (k = 0; k < 32; k++) {
532 udelay(10);
533 tmp = RREG32(i2c_cntl_0);
534 if (tmp & RADEON_I2C_GO)
535 continue;
536 tmp = RREG32(i2c_cntl_0);
537 if (tmp & RADEON_I2C_DONE)
538 break;
539 else {
540 DRM_DEBUG("i2c write error 0x%08x\n", tmp);
541 WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT);
542 ret = -EIO;
543 goto done;
544 }
545 }
546 }
547 }
548 }
549
550done:
551 WREG32(i2c_cntl_0, 0);
552 WREG32(i2c_cntl_1, 0);
553 WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
554 RADEON_I2C_NACK |
555 RADEON_I2C_HALT |
556 RADEON_I2C_SOFT_RST));
557
558 if (rdev->is_atom_bios) {
559 tmp = RREG32(RADEON_BIOS_6_SCRATCH);
560 tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE;
561 WREG32(RADEON_BIOS_6_SCRATCH, tmp);
562 }
563
564 mutex_unlock(&rdev->pm.mutex);
565 mutex_unlock(&rdev->dc_hw_i2c_mutex);
566
567 return ret;
568}
569
570/* hw i2c engine for r5xx hardware
571 * hw can buffer up to 15 bytes
572 */
573static int r500_hw_i2c_xfer(struct i2c_adapter *i2c_adap,
574 struct i2c_msg *msgs, int num)
575{
576 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
577 struct radeon_device *rdev = i2c->dev->dev_private;
578 struct radeon_i2c_bus_rec *rec = &i2c->rec;
579 struct i2c_msg *p;
580 int i, j, remaining, current_count, buffer_offset, ret = num;
581 u32 prescale;
582 u32 tmp, reg;
583 u32 saved1, saved2;
584
585 mutex_lock(&rdev->dc_hw_i2c_mutex);
586 /* take the pm lock since we need a constant sclk */
587 mutex_lock(&rdev->pm.mutex);
588
589 prescale = radeon_get_i2c_prescale(rdev);
590
591 /* clear gpio mask bits */
592 tmp = RREG32(rec->mask_clk_reg);
593 tmp &= ~rec->mask_clk_mask;
594 WREG32(rec->mask_clk_reg, tmp);
595 tmp = RREG32(rec->mask_clk_reg);
596
597 tmp = RREG32(rec->mask_data_reg);
598 tmp &= ~rec->mask_data_mask;
599 WREG32(rec->mask_data_reg, tmp);
600 tmp = RREG32(rec->mask_data_reg);
601
602 /* clear pin values */
603 tmp = RREG32(rec->a_clk_reg);
604 tmp &= ~rec->a_clk_mask;
605 WREG32(rec->a_clk_reg, tmp);
606 tmp = RREG32(rec->a_clk_reg);
607
608 tmp = RREG32(rec->a_data_reg);
609 tmp &= ~rec->a_data_mask;
610 WREG32(rec->a_data_reg, tmp);
611 tmp = RREG32(rec->a_data_reg);
612
613 /* set the pins to input */
614 tmp = RREG32(rec->en_clk_reg);
615 tmp &= ~rec->en_clk_mask;
616 WREG32(rec->en_clk_reg, tmp);
617 tmp = RREG32(rec->en_clk_reg);
618
619 tmp = RREG32(rec->en_data_reg);
620 tmp &= ~rec->en_data_mask;
621 WREG32(rec->en_data_reg, tmp);
622 tmp = RREG32(rec->en_data_reg);
623
624 /* */
625 tmp = RREG32(RADEON_BIOS_6_SCRATCH);
626 WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE);
627 saved1 = RREG32(AVIVO_DC_I2C_CONTROL1);
628 saved2 = RREG32(0x494);
629 WREG32(0x494, saved2 | 0x1);
630
631 WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_WANTS_TO_USE_I2C);
632 for (i = 0; i < 50; i++) {
633 udelay(1);
634 if (RREG32(AVIVO_DC_I2C_ARBITRATION) & AVIVO_DC_I2C_SW_CAN_USE_I2C)
635 break;
636 }
637 if (i == 50) {
638 DRM_ERROR("failed to get i2c bus\n");
639 ret = -EBUSY;
640 goto done;
641 }
642
643 reg = AVIVO_DC_I2C_START | AVIVO_DC_I2C_STOP | AVIVO_DC_I2C_EN;
644 switch (rec->mask_clk_reg) {
645 case AVIVO_DC_GPIO_DDC1_MASK:
646 reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC1);
647 break;
648 case AVIVO_DC_GPIO_DDC2_MASK:
649 reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC2);
650 break;
651 case AVIVO_DC_GPIO_DDC3_MASK:
652 reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC3);
653 break;
654 default:
655 DRM_ERROR("gpio not supported with hw i2c\n");
656 ret = -EINVAL;
657 goto done;
658 }
659
660 /* check for bus probe */
661 p = &msgs[0];
662 if ((num == 1) && (p->len == 0)) {
663 WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
664 AVIVO_DC_I2C_NACK |
665 AVIVO_DC_I2C_HALT));
666 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
667 udelay(1);
668 WREG32(AVIVO_DC_I2C_RESET, 0);
669
670 WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff);
671 WREG32(AVIVO_DC_I2C_DATA, 0);
672
673 WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48));
674 WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) |
675 AVIVO_DC_I2C_DATA_COUNT(1) |
676 (prescale << 16)));
677 WREG32(AVIVO_DC_I2C_CONTROL1, reg);
678 WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO);
679 for (j = 0; j < 200; j++) {
680 udelay(50);
681 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
682 if (tmp & AVIVO_DC_I2C_GO)
683 continue;
684 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
685 if (tmp & AVIVO_DC_I2C_DONE)
686 break;
687 else {
688 DRM_DEBUG("i2c write error 0x%08x\n", tmp);
689 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT);
690 ret = -EIO;
691 goto done;
692 }
693 }
694 goto done;
695 }
696
697 for (i = 0; i < num; i++) {
698 p = &msgs[i];
699 remaining = p->len;
700 buffer_offset = 0;
701 if (p->flags & I2C_M_RD) {
702 while (remaining) {
703 if (remaining > 15)
704 current_count = 15;
705 else
706 current_count = remaining;
707 WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
708 AVIVO_DC_I2C_NACK |
709 AVIVO_DC_I2C_HALT));
710 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
711 udelay(1);
712 WREG32(AVIVO_DC_I2C_RESET, 0);
713
714 WREG32(AVIVO_DC_I2C_DATA, ((p->addr << 1) & 0xff) | 0x1);
715 WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48));
716 WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) |
717 AVIVO_DC_I2C_DATA_COUNT(current_count) |
718 (prescale << 16)));
719 WREG32(AVIVO_DC_I2C_CONTROL1, reg | AVIVO_DC_I2C_RECEIVE);
720 WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO);
721 for (j = 0; j < 200; j++) {
722 udelay(50);
723 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
724 if (tmp & AVIVO_DC_I2C_GO)
725 continue;
726 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
727 if (tmp & AVIVO_DC_I2C_DONE)
728 break;
729 else {
730 DRM_DEBUG("i2c read error 0x%08x\n", tmp);
731 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT);
732 ret = -EIO;
733 goto done;
734 }
735 }
736 for (j = 0; j < current_count; j++)
737 p->buf[buffer_offset + j] = RREG32(AVIVO_DC_I2C_DATA) & 0xff;
738 remaining -= current_count;
739 buffer_offset += current_count;
740 }
741 } else {
742 while (remaining) {
743 if (remaining > 15)
744 current_count = 15;
745 else
746 current_count = remaining;
747 WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
748 AVIVO_DC_I2C_NACK |
749 AVIVO_DC_I2C_HALT));
750 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
751 udelay(1);
752 WREG32(AVIVO_DC_I2C_RESET, 0);
753
754 WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff);
755 for (j = 0; j < current_count; j++)
756 WREG32(AVIVO_DC_I2C_DATA, p->buf[buffer_offset + j]);
757
758 WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48));
759 WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) |
760 AVIVO_DC_I2C_DATA_COUNT(current_count) |
761 (prescale << 16)));
762 WREG32(AVIVO_DC_I2C_CONTROL1, reg);
763 WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO);
764 for (j = 0; j < 200; j++) {
765 udelay(50);
766 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
767 if (tmp & AVIVO_DC_I2C_GO)
768 continue;
769 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
770 if (tmp & AVIVO_DC_I2C_DONE)
771 break;
772 else {
773 DRM_DEBUG("i2c write error 0x%08x\n", tmp);
774 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT);
775 ret = -EIO;
776 goto done;
777 }
778 }
779 remaining -= current_count;
780 buffer_offset += current_count;
781 }
782 }
783 }
784
785done:
786 WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
787 AVIVO_DC_I2C_NACK |
788 AVIVO_DC_I2C_HALT));
789 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
790 udelay(1);
791 WREG32(AVIVO_DC_I2C_RESET, 0);
792
793 WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_DONE_USING_I2C);
794 WREG32(AVIVO_DC_I2C_CONTROL1, saved1);
795 WREG32(0x494, saved2);
796 tmp = RREG32(RADEON_BIOS_6_SCRATCH);
797 tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE;
798 WREG32(RADEON_BIOS_6_SCRATCH, tmp);
799
800 mutex_unlock(&rdev->pm.mutex);
801 mutex_unlock(&rdev->dc_hw_i2c_mutex);
802
803 return ret;
804}
805
806static int radeon_hw_i2c_xfer(struct i2c_adapter *i2c_adap,
807 struct i2c_msg *msgs, int num)
808{
809 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
810 struct radeon_device *rdev = i2c->dev->dev_private;
811 struct radeon_i2c_bus_rec *rec = &i2c->rec;
812 int ret = 0;
813
814 switch (rdev->family) {
815 case CHIP_R100:
816 case CHIP_RV100:
817 case CHIP_RS100:
818 case CHIP_RV200:
819 case CHIP_RS200:
820 case CHIP_R200:
821 case CHIP_RV250:
822 case CHIP_RS300:
823 case CHIP_RV280:
824 case CHIP_R300:
825 case CHIP_R350:
826 case CHIP_RV350:
827 case CHIP_RV380:
828 case CHIP_R420:
829 case CHIP_R423:
830 case CHIP_RV410:
831 case CHIP_RS400:
832 case CHIP_RS480:
833 ret = r100_hw_i2c_xfer(i2c_adap, msgs, num);
834 break;
835 case CHIP_RS600:
836 case CHIP_RS690:
837 case CHIP_RS740:
838 /* XXX fill in hw i2c implementation */
839 break;
840 case CHIP_RV515:
841 case CHIP_R520:
842 case CHIP_RV530:
843 case CHIP_RV560:
844 case CHIP_RV570:
845 case CHIP_R580:
846 if (rec->mm_i2c)
847 ret = r100_hw_i2c_xfer(i2c_adap, msgs, num);
848 else
849 ret = r500_hw_i2c_xfer(i2c_adap, msgs, num);
850 break;
851 case CHIP_R600:
852 case CHIP_RV610:
853 case CHIP_RV630:
854 case CHIP_RV670:
855 /* XXX fill in hw i2c implementation */
856 break;
857 case CHIP_RV620:
858 case CHIP_RV635:
859 case CHIP_RS780:
860 case CHIP_RS880:
861 case CHIP_RV770:
862 case CHIP_RV730:
863 case CHIP_RV710:
864 case CHIP_RV740:
865 /* XXX fill in hw i2c implementation */
866 break;
867 case CHIP_CEDAR:
868 case CHIP_REDWOOD:
869 case CHIP_JUNIPER:
870 case CHIP_CYPRESS:
871 case CHIP_HEMLOCK:
872 /* XXX fill in hw i2c implementation */
873 break;
874 default:
875 DRM_ERROR("i2c: unhandled radeon chip\n");
876 ret = -EIO;
877 break;
878 }
879
880 return ret;
881}
882
883static u32 radeon_hw_i2c_func(struct i2c_adapter *adap)
884{
885 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
886}
887
888static const struct i2c_algorithm radeon_i2c_algo = {
889 .master_xfer = radeon_hw_i2c_xfer,
890 .functionality = radeon_hw_i2c_func,
891};
892
893struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
894 struct radeon_i2c_bus_rec *rec,
895 const char *name)
896{
897 struct radeon_device *rdev = dev->dev_private;
898 struct radeon_i2c_chan *i2c;
899 int ret;
900
901 i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
902 if (i2c == NULL)
903 return NULL;
904
905 i2c->rec = *rec;
906 i2c->adapter.owner = THIS_MODULE;
907 i2c->adapter.class = I2C_CLASS_DDC;
908 i2c->dev = dev;
909 i2c_set_adapdata(&i2c->adapter, i2c);
910 if (rec->mm_i2c ||
911 (rec->hw_capable &&
912 radeon_hw_i2c &&
913 ((rdev->family <= CHIP_RS480) ||
914 ((rdev->family >= CHIP_RV515) && (rdev->family <= CHIP_R580))))) {
915 /* set the radeon hw i2c adapter */
916 snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
917 "Radeon i2c hw bus %s", name);
918 i2c->adapter.algo = &radeon_i2c_algo;
919 ret = i2c_add_adapter(&i2c->adapter);
920 if (ret) {
921 DRM_ERROR("Failed to register hw i2c %s\n", name);
922 goto out_free;
923 }
924 } else {
925 /* set the radeon bit adapter */
926 snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
927 "Radeon i2c bit bus %s", name);
928 i2c->adapter.algo_data = &i2c->algo.bit;
929 i2c->algo.bit.pre_xfer = pre_xfer;
930 i2c->algo.bit.post_xfer = post_xfer;
931 i2c->algo.bit.setsda = set_data;
932 i2c->algo.bit.setscl = set_clock;
933 i2c->algo.bit.getsda = get_data;
934 i2c->algo.bit.getscl = get_clock;
935 i2c->algo.bit.udelay = 20;
936 /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
937 * make this, 2 jiffies is a lot more reliable */
938 i2c->algo.bit.timeout = 2;
939 i2c->algo.bit.data = i2c;
940 ret = i2c_bit_add_bus(&i2c->adapter);
941 if (ret) {
942 DRM_ERROR("Failed to register bit i2c %s\n", name);
943 goto out_free;
944 }
945 }
946
947 return i2c;
948out_free:
949 kfree(i2c);
950 return NULL;
951
952}
953
954struct radeon_i2c_chan *radeon_i2c_create_dp(struct drm_device *dev,
955 struct radeon_i2c_bus_rec *rec,
956 const char *name)
957{
958 struct radeon_i2c_chan *i2c;
959 int ret;
960
961 i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
962 if (i2c == NULL)
963 return NULL;
964
965 i2c->rec = *rec;
966 i2c->adapter.owner = THIS_MODULE;
967 i2c->adapter.class = I2C_CLASS_DDC;
968 i2c->dev = dev;
969 snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
970 "Radeon aux bus %s", name);
971 i2c_set_adapdata(&i2c->adapter, i2c);
972 i2c->adapter.algo_data = &i2c->algo.dp;
973 i2c->algo.dp.aux_ch = radeon_dp_i2c_aux_ch;
974 i2c->algo.dp.address = 0;
975 ret = i2c_dp_aux_add_bus(&i2c->adapter);
976 if (ret) {
977 DRM_INFO("Failed to register i2c %s\n", name);
978 goto out_free;
979 }
980
981 return i2c;
982out_free:
983 kfree(i2c);
984 return NULL;
985
986}
987
988void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
989{
990 if (!i2c)
991 return;
992 i2c_del_adapter(&i2c->adapter);
993 kfree(i2c);
994}
995
996/* Add the default buses */
997void radeon_i2c_init(struct radeon_device *rdev)
998{
999 if (rdev->is_atom_bios)
1000 radeon_atombios_i2c_init(rdev);
1001 else
1002 radeon_combios_i2c_init(rdev);
1003}
1004
1005/* remove all the buses */
1006void radeon_i2c_fini(struct radeon_device *rdev)
1007{
1008 int i;
1009
1010 for (i = 0; i < RADEON_MAX_I2C_BUS; i++) {
1011 if (rdev->i2c_bus[i]) {
1012 radeon_i2c_destroy(rdev->i2c_bus[i]);
1013 rdev->i2c_bus[i] = NULL;
1014 }
1015 }
1016}
1017
1018/* Add additional buses */
1019void radeon_i2c_add(struct radeon_device *rdev,
1020 struct radeon_i2c_bus_rec *rec,
1021 const char *name)
1022{
1023 struct drm_device *dev = rdev->ddev;
1024 int i;
1025
1026 for (i = 0; i < RADEON_MAX_I2C_BUS; i++) {
1027 if (!rdev->i2c_bus[i]) {
1028 rdev->i2c_bus[i] = radeon_i2c_create(dev, rec, name);
1029 return;
1030 }
1031 }
1032}
1033
1034/* looks up bus based on id */
1035struct radeon_i2c_chan *radeon_i2c_lookup(struct radeon_device *rdev,
1036 struct radeon_i2c_bus_rec *i2c_bus)
1037{
1038 int i;
1039
1040 for (i = 0; i < RADEON_MAX_I2C_BUS; i++) {
1041 if (rdev->i2c_bus[i] &&
1042 (rdev->i2c_bus[i]->rec.i2c_id == i2c_bus->i2c_id)) {
1043 return rdev->i2c_bus[i];
1044 }
1045 }
1046 return NULL;
1047}
1048
1049struct drm_encoder *radeon_best_encoder(struct drm_connector *connector)
1050{
1051 return NULL;
1052}
1053
1054void radeon_i2c_get_byte(struct radeon_i2c_chan *i2c_bus,
1055 u8 slave_addr,
1056 u8 addr,
1057 u8 *val)
1058{
1059 u8 out_buf[2];
1060 u8 in_buf[2];
1061 struct i2c_msg msgs[] = {
1062 {
1063 .addr = slave_addr,
1064 .flags = 0,
1065 .len = 1,
1066 .buf = out_buf,
1067 },
1068 {
1069 .addr = slave_addr,
1070 .flags = I2C_M_RD,
1071 .len = 1,
1072 .buf = in_buf,
1073 }
1074 };
1075
1076 out_buf[0] = addr;
1077 out_buf[1] = 0;
1078
1079 if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) {
1080 *val = in_buf[0];
1081 DRM_DEBUG("val = 0x%02x\n", *val);
1082 } else {
1083 DRM_DEBUG("i2c 0x%02x 0x%02x read failed\n",
1084 addr, *val);
1085 }
1086}
1087
1088void radeon_i2c_put_byte(struct radeon_i2c_chan *i2c_bus,
1089 u8 slave_addr,
1090 u8 addr,
1091 u8 val)
1092{
1093 uint8_t out_buf[2];
1094 struct i2c_msg msg = {
1095 .addr = slave_addr,
1096 .flags = 0,
1097 .len = 2,
1098 .buf = out_buf,
1099 };
1100
1101 out_buf[0] = addr;
1102 out_buf[1] = val;
1103
1104 if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1)
1105 DRM_DEBUG("i2c 0x%02x 0x%02x write failed\n",
1106 addr, val);
1107}
1108
1109/* ddc router switching */
1110void radeon_router_select_ddc_port(struct radeon_connector *radeon_connector)
1111{
1112 u8 val;
1113
1114 if (!radeon_connector->router.ddc_valid)
1115 return;
1116
1117 if (!radeon_connector->router_bus)
1118 return;
1119
1120 radeon_i2c_get_byte(radeon_connector->router_bus,
1121 radeon_connector->router.i2c_addr,
1122 0x3, &val);
1123 val &= ~radeon_connector->router.ddc_mux_control_pin;
1124 radeon_i2c_put_byte(radeon_connector->router_bus,
1125 radeon_connector->router.i2c_addr,
1126 0x3, val);
1127 radeon_i2c_get_byte(radeon_connector->router_bus,
1128 radeon_connector->router.i2c_addr,
1129 0x1, &val);
1130 val &= ~radeon_connector->router.ddc_mux_control_pin;
1131 val |= radeon_connector->router.ddc_mux_state;
1132 radeon_i2c_put_byte(radeon_connector->router_bus,
1133 radeon_connector->router.i2c_addr,
1134 0x1, val);
1135}
1136
1137/* clock/data router switching */
1138void radeon_router_select_cd_port(struct radeon_connector *radeon_connector)
1139{
1140 u8 val;
1141
1142 if (!radeon_connector->router.cd_valid)
1143 return;
1144
1145 if (!radeon_connector->router_bus)
1146 return;
1147
1148 radeon_i2c_get_byte(radeon_connector->router_bus,
1149 radeon_connector->router.i2c_addr,
1150 0x3, &val);
1151 val &= ~radeon_connector->router.cd_mux_control_pin;
1152 radeon_i2c_put_byte(radeon_connector->router_bus,
1153 radeon_connector->router.i2c_addr,
1154 0x3, val);
1155 radeon_i2c_get_byte(radeon_connector->router_bus,
1156 radeon_connector->router.i2c_addr,
1157 0x1, &val);
1158 val &= ~radeon_connector->router.cd_mux_control_pin;
1159 val |= radeon_connector->router.cd_mux_state;
1160 radeon_i2c_put_byte(radeon_connector->router_bus,
1161 radeon_connector->router.i2c_addr,
1162 0x1, val);
1163}
1164
1/*
2 * Copyright 2007-8 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors: Dave Airlie
24 * Alex Deucher
25 */
26
27#include <linux/export.h>
28#include <linux/pci.h>
29
30#include <drm/drm_device.h>
31#include <drm/drm_edid.h>
32#include <drm/radeon_drm.h>
33
34#include "radeon.h"
35#include "atom.h"
36
37bool radeon_ddc_probe(struct radeon_connector *radeon_connector, bool use_aux)
38{
39 u8 out = 0x0;
40 u8 buf[8];
41 int ret;
42 struct i2c_msg msgs[] = {
43 {
44 .addr = DDC_ADDR,
45 .flags = 0,
46 .len = 1,
47 .buf = &out,
48 },
49 {
50 .addr = DDC_ADDR,
51 .flags = I2C_M_RD,
52 .len = 8,
53 .buf = buf,
54 }
55 };
56
57 /* on hw with routers, select right port */
58 if (radeon_connector->router.ddc_valid)
59 radeon_router_select_ddc_port(radeon_connector);
60
61 if (use_aux) {
62 ret = i2c_transfer(&radeon_connector->ddc_bus->aux.ddc, msgs, 2);
63 } else {
64 ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2);
65 }
66
67 if (ret != 2)
68 /* Couldn't find an accessible DDC on this connector */
69 return false;
70 /* Probe also for valid EDID header
71 * EDID header starts with:
72 * 0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00.
73 * Only the first 6 bytes must be valid as
74 * drm_edid_block_valid() can fix the last 2 bytes */
75 if (drm_edid_header_is_valid(buf) < 6) {
76 /* Couldn't find an accessible EDID on this
77 * connector */
78 return false;
79 }
80 return true;
81}
82
83/* bit banging i2c */
84
85static int pre_xfer(struct i2c_adapter *i2c_adap)
86{
87 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
88 struct radeon_device *rdev = i2c->dev->dev_private;
89 struct radeon_i2c_bus_rec *rec = &i2c->rec;
90 uint32_t temp;
91
92 mutex_lock(&i2c->mutex);
93
94 /* RV410 appears to have a bug where the hw i2c in reset
95 * holds the i2c port in a bad state - switch hw i2c away before
96 * doing DDC - do this for all r200s/r300s/r400s for safety sake
97 */
98 if (rec->hw_capable) {
99 if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) {
100 u32 reg;
101
102 if (rdev->family >= CHIP_RV350)
103 reg = RADEON_GPIO_MONID;
104 else if ((rdev->family == CHIP_R300) ||
105 (rdev->family == CHIP_R350))
106 reg = RADEON_GPIO_DVI_DDC;
107 else
108 reg = RADEON_GPIO_CRT2_DDC;
109
110 mutex_lock(&rdev->dc_hw_i2c_mutex);
111 if (rec->a_clk_reg == reg) {
112 WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
113 R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1)));
114 } else {
115 WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
116 R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3)));
117 }
118 mutex_unlock(&rdev->dc_hw_i2c_mutex);
119 }
120 }
121
122 /* switch the pads to ddc mode */
123 if (ASIC_IS_DCE3(rdev) && rec->hw_capable) {
124 temp = RREG32(rec->mask_clk_reg);
125 temp &= ~(1 << 16);
126 WREG32(rec->mask_clk_reg, temp);
127 }
128
129 /* clear the output pin values */
130 temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask;
131 WREG32(rec->a_clk_reg, temp);
132
133 temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask;
134 WREG32(rec->a_data_reg, temp);
135
136 /* set the pins to input */
137 temp = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;
138 WREG32(rec->en_clk_reg, temp);
139
140 temp = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
141 WREG32(rec->en_data_reg, temp);
142
143 /* mask the gpio pins for software use */
144 temp = RREG32(rec->mask_clk_reg) | rec->mask_clk_mask;
145 WREG32(rec->mask_clk_reg, temp);
146 temp = RREG32(rec->mask_clk_reg);
147
148 temp = RREG32(rec->mask_data_reg) | rec->mask_data_mask;
149 WREG32(rec->mask_data_reg, temp);
150 temp = RREG32(rec->mask_data_reg);
151
152 return 0;
153}
154
155static void post_xfer(struct i2c_adapter *i2c_adap)
156{
157 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
158 struct radeon_device *rdev = i2c->dev->dev_private;
159 struct radeon_i2c_bus_rec *rec = &i2c->rec;
160 uint32_t temp;
161
162 /* unmask the gpio pins for software use */
163 temp = RREG32(rec->mask_clk_reg) & ~rec->mask_clk_mask;
164 WREG32(rec->mask_clk_reg, temp);
165 temp = RREG32(rec->mask_clk_reg);
166
167 temp = RREG32(rec->mask_data_reg) & ~rec->mask_data_mask;
168 WREG32(rec->mask_data_reg, temp);
169 temp = RREG32(rec->mask_data_reg);
170
171 mutex_unlock(&i2c->mutex);
172}
173
174static int get_clock(void *i2c_priv)
175{
176 struct radeon_i2c_chan *i2c = i2c_priv;
177 struct radeon_device *rdev = i2c->dev->dev_private;
178 struct radeon_i2c_bus_rec *rec = &i2c->rec;
179 uint32_t val;
180
181 /* read the value off the pin */
182 val = RREG32(rec->y_clk_reg);
183 val &= rec->y_clk_mask;
184
185 return (val != 0);
186}
187
188
189static int get_data(void *i2c_priv)
190{
191 struct radeon_i2c_chan *i2c = i2c_priv;
192 struct radeon_device *rdev = i2c->dev->dev_private;
193 struct radeon_i2c_bus_rec *rec = &i2c->rec;
194 uint32_t val;
195
196 /* read the value off the pin */
197 val = RREG32(rec->y_data_reg);
198 val &= rec->y_data_mask;
199
200 return (val != 0);
201}
202
203static void set_clock(void *i2c_priv, int clock)
204{
205 struct radeon_i2c_chan *i2c = i2c_priv;
206 struct radeon_device *rdev = i2c->dev->dev_private;
207 struct radeon_i2c_bus_rec *rec = &i2c->rec;
208 uint32_t val;
209
210 /* set pin direction */
211 val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;
212 val |= clock ? 0 : rec->en_clk_mask;
213 WREG32(rec->en_clk_reg, val);
214}
215
216static void set_data(void *i2c_priv, int data)
217{
218 struct radeon_i2c_chan *i2c = i2c_priv;
219 struct radeon_device *rdev = i2c->dev->dev_private;
220 struct radeon_i2c_bus_rec *rec = &i2c->rec;
221 uint32_t val;
222
223 /* set pin direction */
224 val = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
225 val |= data ? 0 : rec->en_data_mask;
226 WREG32(rec->en_data_reg, val);
227}
228
229/* hw i2c */
230
231static u32 radeon_get_i2c_prescale(struct radeon_device *rdev)
232{
233 u32 sclk = rdev->pm.current_sclk;
234 u32 prescale = 0;
235 u32 nm;
236 u8 n, m, loop;
237 int i2c_clock;
238
239 switch (rdev->family) {
240 case CHIP_R100:
241 case CHIP_RV100:
242 case CHIP_RS100:
243 case CHIP_RV200:
244 case CHIP_RS200:
245 case CHIP_R200:
246 case CHIP_RV250:
247 case CHIP_RS300:
248 case CHIP_RV280:
249 case CHIP_R300:
250 case CHIP_R350:
251 case CHIP_RV350:
252 i2c_clock = 60;
253 nm = (sclk * 10) / (i2c_clock * 4);
254 for (loop = 1; loop < 255; loop++) {
255 if ((nm / loop) < loop)
256 break;
257 }
258 n = loop - 1;
259 m = loop - 2;
260 prescale = m | (n << 8);
261 break;
262 case CHIP_RV380:
263 case CHIP_RS400:
264 case CHIP_RS480:
265 case CHIP_R420:
266 case CHIP_R423:
267 case CHIP_RV410:
268 prescale = (((sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128;
269 break;
270 case CHIP_RS600:
271 case CHIP_RS690:
272 case CHIP_RS740:
273 /* todo */
274 break;
275 case CHIP_RV515:
276 case CHIP_R520:
277 case CHIP_RV530:
278 case CHIP_RV560:
279 case CHIP_RV570:
280 case CHIP_R580:
281 i2c_clock = 50;
282 if (rdev->family == CHIP_R520)
283 prescale = (127 << 8) + ((sclk * 10) / (4 * 127 * i2c_clock));
284 else
285 prescale = (((sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128;
286 break;
287 case CHIP_R600:
288 case CHIP_RV610:
289 case CHIP_RV630:
290 case CHIP_RV670:
291 /* todo */
292 break;
293 case CHIP_RV620:
294 case CHIP_RV635:
295 case CHIP_RS780:
296 case CHIP_RS880:
297 case CHIP_RV770:
298 case CHIP_RV730:
299 case CHIP_RV710:
300 case CHIP_RV740:
301 /* todo */
302 break;
303 case CHIP_CEDAR:
304 case CHIP_REDWOOD:
305 case CHIP_JUNIPER:
306 case CHIP_CYPRESS:
307 case CHIP_HEMLOCK:
308 /* todo */
309 break;
310 default:
311 DRM_ERROR("i2c: unhandled radeon chip\n");
312 break;
313 }
314 return prescale;
315}
316
317
318/* hw i2c engine for r1xx-4xx hardware
319 * hw can buffer up to 15 bytes
320 */
321static int r100_hw_i2c_xfer(struct i2c_adapter *i2c_adap,
322 struct i2c_msg *msgs, int num)
323{
324 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
325 struct radeon_device *rdev = i2c->dev->dev_private;
326 struct radeon_i2c_bus_rec *rec = &i2c->rec;
327 struct i2c_msg *p;
328 int i, j, k, ret = num;
329 u32 prescale;
330 u32 i2c_cntl_0, i2c_cntl_1, i2c_data;
331 u32 tmp, reg;
332
333 mutex_lock(&rdev->dc_hw_i2c_mutex);
334 /* take the pm lock since we need a constant sclk */
335 mutex_lock(&rdev->pm.mutex);
336
337 prescale = radeon_get_i2c_prescale(rdev);
338
339 reg = ((prescale << RADEON_I2C_PRESCALE_SHIFT) |
340 RADEON_I2C_DRIVE_EN |
341 RADEON_I2C_START |
342 RADEON_I2C_STOP |
343 RADEON_I2C_GO);
344
345 if (rdev->is_atom_bios) {
346 tmp = RREG32(RADEON_BIOS_6_SCRATCH);
347 WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE);
348 }
349
350 if (rec->mm_i2c) {
351 i2c_cntl_0 = RADEON_I2C_CNTL_0;
352 i2c_cntl_1 = RADEON_I2C_CNTL_1;
353 i2c_data = RADEON_I2C_DATA;
354 } else {
355 i2c_cntl_0 = RADEON_DVI_I2C_CNTL_0;
356 i2c_cntl_1 = RADEON_DVI_I2C_CNTL_1;
357 i2c_data = RADEON_DVI_I2C_DATA;
358
359 switch (rdev->family) {
360 case CHIP_R100:
361 case CHIP_RV100:
362 case CHIP_RS100:
363 case CHIP_RV200:
364 case CHIP_RS200:
365 case CHIP_RS300:
366 switch (rec->mask_clk_reg) {
367 case RADEON_GPIO_DVI_DDC:
368 /* no gpio select bit */
369 break;
370 default:
371 DRM_ERROR("gpio not supported with hw i2c\n");
372 ret = -EINVAL;
373 goto done;
374 }
375 break;
376 case CHIP_R200:
377 /* only bit 4 on r200 */
378 switch (rec->mask_clk_reg) {
379 case RADEON_GPIO_DVI_DDC:
380 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
381 break;
382 case RADEON_GPIO_MONID:
383 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
384 break;
385 default:
386 DRM_ERROR("gpio not supported with hw i2c\n");
387 ret = -EINVAL;
388 goto done;
389 }
390 break;
391 case CHIP_RV250:
392 case CHIP_RV280:
393 /* bits 3 and 4 */
394 switch (rec->mask_clk_reg) {
395 case RADEON_GPIO_DVI_DDC:
396 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
397 break;
398 case RADEON_GPIO_VGA_DDC:
399 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2);
400 break;
401 case RADEON_GPIO_CRT2_DDC:
402 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
403 break;
404 default:
405 DRM_ERROR("gpio not supported with hw i2c\n");
406 ret = -EINVAL;
407 goto done;
408 }
409 break;
410 case CHIP_R300:
411 case CHIP_R350:
412 /* only bit 4 on r300/r350 */
413 switch (rec->mask_clk_reg) {
414 case RADEON_GPIO_VGA_DDC:
415 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
416 break;
417 case RADEON_GPIO_DVI_DDC:
418 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
419 break;
420 default:
421 DRM_ERROR("gpio not supported with hw i2c\n");
422 ret = -EINVAL;
423 goto done;
424 }
425 break;
426 case CHIP_RV350:
427 case CHIP_RV380:
428 case CHIP_R420:
429 case CHIP_R423:
430 case CHIP_RV410:
431 case CHIP_RS400:
432 case CHIP_RS480:
433 /* bits 3 and 4 */
434 switch (rec->mask_clk_reg) {
435 case RADEON_GPIO_VGA_DDC:
436 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1);
437 break;
438 case RADEON_GPIO_DVI_DDC:
439 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2);
440 break;
441 case RADEON_GPIO_MONID:
442 reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3);
443 break;
444 default:
445 DRM_ERROR("gpio not supported with hw i2c\n");
446 ret = -EINVAL;
447 goto done;
448 }
449 break;
450 default:
451 DRM_ERROR("unsupported asic\n");
452 ret = -EINVAL;
453 goto done;
454 break;
455 }
456 }
457
458 /* check for bus probe */
459 p = &msgs[0];
460 if ((num == 1) && (p->len == 0)) {
461 WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
462 RADEON_I2C_NACK |
463 RADEON_I2C_HALT |
464 RADEON_I2C_SOFT_RST));
465 WREG32(i2c_data, (p->addr << 1) & 0xff);
466 WREG32(i2c_data, 0);
467 WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) |
468 (1 << RADEON_I2C_ADDR_COUNT_SHIFT) |
469 RADEON_I2C_EN |
470 (48 << RADEON_I2C_TIME_LIMIT_SHIFT)));
471 WREG32(i2c_cntl_0, reg);
472 for (k = 0; k < 32; k++) {
473 udelay(10);
474 tmp = RREG32(i2c_cntl_0);
475 if (tmp & RADEON_I2C_GO)
476 continue;
477 tmp = RREG32(i2c_cntl_0);
478 if (tmp & RADEON_I2C_DONE)
479 break;
480 else {
481 DRM_DEBUG("i2c write error 0x%08x\n", tmp);
482 WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT);
483 ret = -EIO;
484 goto done;
485 }
486 }
487 goto done;
488 }
489
490 for (i = 0; i < num; i++) {
491 p = &msgs[i];
492 for (j = 0; j < p->len; j++) {
493 if (p->flags & I2C_M_RD) {
494 WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
495 RADEON_I2C_NACK |
496 RADEON_I2C_HALT |
497 RADEON_I2C_SOFT_RST));
498 WREG32(i2c_data, ((p->addr << 1) & 0xff) | 0x1);
499 WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) |
500 (1 << RADEON_I2C_ADDR_COUNT_SHIFT) |
501 RADEON_I2C_EN |
502 (48 << RADEON_I2C_TIME_LIMIT_SHIFT)));
503 WREG32(i2c_cntl_0, reg | RADEON_I2C_RECEIVE);
504 for (k = 0; k < 32; k++) {
505 udelay(10);
506 tmp = RREG32(i2c_cntl_0);
507 if (tmp & RADEON_I2C_GO)
508 continue;
509 tmp = RREG32(i2c_cntl_0);
510 if (tmp & RADEON_I2C_DONE)
511 break;
512 else {
513 DRM_DEBUG("i2c read error 0x%08x\n", tmp);
514 WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT);
515 ret = -EIO;
516 goto done;
517 }
518 }
519 p->buf[j] = RREG32(i2c_data) & 0xff;
520 } else {
521 WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
522 RADEON_I2C_NACK |
523 RADEON_I2C_HALT |
524 RADEON_I2C_SOFT_RST));
525 WREG32(i2c_data, (p->addr << 1) & 0xff);
526 WREG32(i2c_data, p->buf[j]);
527 WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) |
528 (1 << RADEON_I2C_ADDR_COUNT_SHIFT) |
529 RADEON_I2C_EN |
530 (48 << RADEON_I2C_TIME_LIMIT_SHIFT)));
531 WREG32(i2c_cntl_0, reg);
532 for (k = 0; k < 32; k++) {
533 udelay(10);
534 tmp = RREG32(i2c_cntl_0);
535 if (tmp & RADEON_I2C_GO)
536 continue;
537 tmp = RREG32(i2c_cntl_0);
538 if (tmp & RADEON_I2C_DONE)
539 break;
540 else {
541 DRM_DEBUG("i2c write error 0x%08x\n", tmp);
542 WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT);
543 ret = -EIO;
544 goto done;
545 }
546 }
547 }
548 }
549 }
550
551done:
552 WREG32(i2c_cntl_0, 0);
553 WREG32(i2c_cntl_1, 0);
554 WREG32(i2c_cntl_0, (RADEON_I2C_DONE |
555 RADEON_I2C_NACK |
556 RADEON_I2C_HALT |
557 RADEON_I2C_SOFT_RST));
558
559 if (rdev->is_atom_bios) {
560 tmp = RREG32(RADEON_BIOS_6_SCRATCH);
561 tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE;
562 WREG32(RADEON_BIOS_6_SCRATCH, tmp);
563 }
564
565 mutex_unlock(&rdev->pm.mutex);
566 mutex_unlock(&rdev->dc_hw_i2c_mutex);
567
568 return ret;
569}
570
571/* hw i2c engine for r5xx hardware
572 * hw can buffer up to 15 bytes
573 */
574static int r500_hw_i2c_xfer(struct i2c_adapter *i2c_adap,
575 struct i2c_msg *msgs, int num)
576{
577 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
578 struct radeon_device *rdev = i2c->dev->dev_private;
579 struct radeon_i2c_bus_rec *rec = &i2c->rec;
580 struct i2c_msg *p;
581 int i, j, remaining, current_count, buffer_offset, ret = num;
582 u32 prescale;
583 u32 tmp, reg;
584 u32 saved1, saved2;
585
586 mutex_lock(&rdev->dc_hw_i2c_mutex);
587 /* take the pm lock since we need a constant sclk */
588 mutex_lock(&rdev->pm.mutex);
589
590 prescale = radeon_get_i2c_prescale(rdev);
591
592 /* clear gpio mask bits */
593 tmp = RREG32(rec->mask_clk_reg);
594 tmp &= ~rec->mask_clk_mask;
595 WREG32(rec->mask_clk_reg, tmp);
596 tmp = RREG32(rec->mask_clk_reg);
597
598 tmp = RREG32(rec->mask_data_reg);
599 tmp &= ~rec->mask_data_mask;
600 WREG32(rec->mask_data_reg, tmp);
601 tmp = RREG32(rec->mask_data_reg);
602
603 /* clear pin values */
604 tmp = RREG32(rec->a_clk_reg);
605 tmp &= ~rec->a_clk_mask;
606 WREG32(rec->a_clk_reg, tmp);
607 tmp = RREG32(rec->a_clk_reg);
608
609 tmp = RREG32(rec->a_data_reg);
610 tmp &= ~rec->a_data_mask;
611 WREG32(rec->a_data_reg, tmp);
612 tmp = RREG32(rec->a_data_reg);
613
614 /* set the pins to input */
615 tmp = RREG32(rec->en_clk_reg);
616 tmp &= ~rec->en_clk_mask;
617 WREG32(rec->en_clk_reg, tmp);
618 tmp = RREG32(rec->en_clk_reg);
619
620 tmp = RREG32(rec->en_data_reg);
621 tmp &= ~rec->en_data_mask;
622 WREG32(rec->en_data_reg, tmp);
623 tmp = RREG32(rec->en_data_reg);
624
625 /* */
626 tmp = RREG32(RADEON_BIOS_6_SCRATCH);
627 WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE);
628 saved1 = RREG32(AVIVO_DC_I2C_CONTROL1);
629 saved2 = RREG32(0x494);
630 WREG32(0x494, saved2 | 0x1);
631
632 WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_WANTS_TO_USE_I2C);
633 for (i = 0; i < 50; i++) {
634 udelay(1);
635 if (RREG32(AVIVO_DC_I2C_ARBITRATION) & AVIVO_DC_I2C_SW_CAN_USE_I2C)
636 break;
637 }
638 if (i == 50) {
639 DRM_ERROR("failed to get i2c bus\n");
640 ret = -EBUSY;
641 goto done;
642 }
643
644 reg = AVIVO_DC_I2C_START | AVIVO_DC_I2C_STOP | AVIVO_DC_I2C_EN;
645 switch (rec->mask_clk_reg) {
646 case AVIVO_DC_GPIO_DDC1_MASK:
647 reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC1);
648 break;
649 case AVIVO_DC_GPIO_DDC2_MASK:
650 reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC2);
651 break;
652 case AVIVO_DC_GPIO_DDC3_MASK:
653 reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC3);
654 break;
655 default:
656 DRM_ERROR("gpio not supported with hw i2c\n");
657 ret = -EINVAL;
658 goto done;
659 }
660
661 /* check for bus probe */
662 p = &msgs[0];
663 if ((num == 1) && (p->len == 0)) {
664 WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
665 AVIVO_DC_I2C_NACK |
666 AVIVO_DC_I2C_HALT));
667 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
668 udelay(1);
669 WREG32(AVIVO_DC_I2C_RESET, 0);
670
671 WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff);
672 WREG32(AVIVO_DC_I2C_DATA, 0);
673
674 WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48));
675 WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) |
676 AVIVO_DC_I2C_DATA_COUNT(1) |
677 (prescale << 16)));
678 WREG32(AVIVO_DC_I2C_CONTROL1, reg);
679 WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO);
680 for (j = 0; j < 200; j++) {
681 udelay(50);
682 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
683 if (tmp & AVIVO_DC_I2C_GO)
684 continue;
685 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
686 if (tmp & AVIVO_DC_I2C_DONE)
687 break;
688 else {
689 DRM_DEBUG("i2c write error 0x%08x\n", tmp);
690 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT);
691 ret = -EIO;
692 goto done;
693 }
694 }
695 goto done;
696 }
697
698 for (i = 0; i < num; i++) {
699 p = &msgs[i];
700 remaining = p->len;
701 buffer_offset = 0;
702 if (p->flags & I2C_M_RD) {
703 while (remaining) {
704 if (remaining > 15)
705 current_count = 15;
706 else
707 current_count = remaining;
708 WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
709 AVIVO_DC_I2C_NACK |
710 AVIVO_DC_I2C_HALT));
711 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
712 udelay(1);
713 WREG32(AVIVO_DC_I2C_RESET, 0);
714
715 WREG32(AVIVO_DC_I2C_DATA, ((p->addr << 1) & 0xff) | 0x1);
716 WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48));
717 WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) |
718 AVIVO_DC_I2C_DATA_COUNT(current_count) |
719 (prescale << 16)));
720 WREG32(AVIVO_DC_I2C_CONTROL1, reg | AVIVO_DC_I2C_RECEIVE);
721 WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO);
722 for (j = 0; j < 200; j++) {
723 udelay(50);
724 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
725 if (tmp & AVIVO_DC_I2C_GO)
726 continue;
727 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
728 if (tmp & AVIVO_DC_I2C_DONE)
729 break;
730 else {
731 DRM_DEBUG("i2c read error 0x%08x\n", tmp);
732 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT);
733 ret = -EIO;
734 goto done;
735 }
736 }
737 for (j = 0; j < current_count; j++)
738 p->buf[buffer_offset + j] = RREG32(AVIVO_DC_I2C_DATA) & 0xff;
739 remaining -= current_count;
740 buffer_offset += current_count;
741 }
742 } else {
743 while (remaining) {
744 if (remaining > 15)
745 current_count = 15;
746 else
747 current_count = remaining;
748 WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
749 AVIVO_DC_I2C_NACK |
750 AVIVO_DC_I2C_HALT));
751 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
752 udelay(1);
753 WREG32(AVIVO_DC_I2C_RESET, 0);
754
755 WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff);
756 for (j = 0; j < current_count; j++)
757 WREG32(AVIVO_DC_I2C_DATA, p->buf[buffer_offset + j]);
758
759 WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48));
760 WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) |
761 AVIVO_DC_I2C_DATA_COUNT(current_count) |
762 (prescale << 16)));
763 WREG32(AVIVO_DC_I2C_CONTROL1, reg);
764 WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO);
765 for (j = 0; j < 200; j++) {
766 udelay(50);
767 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
768 if (tmp & AVIVO_DC_I2C_GO)
769 continue;
770 tmp = RREG32(AVIVO_DC_I2C_STATUS1);
771 if (tmp & AVIVO_DC_I2C_DONE)
772 break;
773 else {
774 DRM_DEBUG("i2c write error 0x%08x\n", tmp);
775 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT);
776 ret = -EIO;
777 goto done;
778 }
779 }
780 remaining -= current_count;
781 buffer_offset += current_count;
782 }
783 }
784 }
785
786done:
787 WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE |
788 AVIVO_DC_I2C_NACK |
789 AVIVO_DC_I2C_HALT));
790 WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET);
791 udelay(1);
792 WREG32(AVIVO_DC_I2C_RESET, 0);
793
794 WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_DONE_USING_I2C);
795 WREG32(AVIVO_DC_I2C_CONTROL1, saved1);
796 WREG32(0x494, saved2);
797 tmp = RREG32(RADEON_BIOS_6_SCRATCH);
798 tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE;
799 WREG32(RADEON_BIOS_6_SCRATCH, tmp);
800
801 mutex_unlock(&rdev->pm.mutex);
802 mutex_unlock(&rdev->dc_hw_i2c_mutex);
803
804 return ret;
805}
806
807static int radeon_hw_i2c_xfer(struct i2c_adapter *i2c_adap,
808 struct i2c_msg *msgs, int num)
809{
810 struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
811 struct radeon_device *rdev = i2c->dev->dev_private;
812 struct radeon_i2c_bus_rec *rec = &i2c->rec;
813 int ret = 0;
814
815 mutex_lock(&i2c->mutex);
816
817 switch (rdev->family) {
818 case CHIP_R100:
819 case CHIP_RV100:
820 case CHIP_RS100:
821 case CHIP_RV200:
822 case CHIP_RS200:
823 case CHIP_R200:
824 case CHIP_RV250:
825 case CHIP_RS300:
826 case CHIP_RV280:
827 case CHIP_R300:
828 case CHIP_R350:
829 case CHIP_RV350:
830 case CHIP_RV380:
831 case CHIP_R420:
832 case CHIP_R423:
833 case CHIP_RV410:
834 case CHIP_RS400:
835 case CHIP_RS480:
836 ret = r100_hw_i2c_xfer(i2c_adap, msgs, num);
837 break;
838 case CHIP_RS600:
839 case CHIP_RS690:
840 case CHIP_RS740:
841 /* XXX fill in hw i2c implementation */
842 break;
843 case CHIP_RV515:
844 case CHIP_R520:
845 case CHIP_RV530:
846 case CHIP_RV560:
847 case CHIP_RV570:
848 case CHIP_R580:
849 if (rec->mm_i2c)
850 ret = r100_hw_i2c_xfer(i2c_adap, msgs, num);
851 else
852 ret = r500_hw_i2c_xfer(i2c_adap, msgs, num);
853 break;
854 case CHIP_R600:
855 case CHIP_RV610:
856 case CHIP_RV630:
857 case CHIP_RV670:
858 /* XXX fill in hw i2c implementation */
859 break;
860 case CHIP_RV620:
861 case CHIP_RV635:
862 case CHIP_RS780:
863 case CHIP_RS880:
864 case CHIP_RV770:
865 case CHIP_RV730:
866 case CHIP_RV710:
867 case CHIP_RV740:
868 /* XXX fill in hw i2c implementation */
869 break;
870 case CHIP_CEDAR:
871 case CHIP_REDWOOD:
872 case CHIP_JUNIPER:
873 case CHIP_CYPRESS:
874 case CHIP_HEMLOCK:
875 /* XXX fill in hw i2c implementation */
876 break;
877 default:
878 DRM_ERROR("i2c: unhandled radeon chip\n");
879 ret = -EIO;
880 break;
881 }
882
883 mutex_unlock(&i2c->mutex);
884
885 return ret;
886}
887
888static u32 radeon_hw_i2c_func(struct i2c_adapter *adap)
889{
890 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
891}
892
893static const struct i2c_algorithm radeon_i2c_algo = {
894 .master_xfer = radeon_hw_i2c_xfer,
895 .functionality = radeon_hw_i2c_func,
896};
897
898static const struct i2c_algorithm radeon_atom_i2c_algo = {
899 .master_xfer = radeon_atom_hw_i2c_xfer,
900 .functionality = radeon_atom_hw_i2c_func,
901};
902
903struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
904 struct radeon_i2c_bus_rec *rec,
905 const char *name)
906{
907 struct radeon_device *rdev = dev->dev_private;
908 struct radeon_i2c_chan *i2c;
909 int ret;
910
911 /* don't add the mm_i2c bus unless hw_i2c is enabled */
912 if (rec->mm_i2c && (radeon_hw_i2c == 0))
913 return NULL;
914
915 i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
916 if (i2c == NULL)
917 return NULL;
918
919 i2c->rec = *rec;
920 i2c->adapter.owner = THIS_MODULE;
921 i2c->adapter.dev.parent = dev->dev;
922 i2c->dev = dev;
923 i2c_set_adapdata(&i2c->adapter, i2c);
924 mutex_init(&i2c->mutex);
925 if (rec->mm_i2c ||
926 (rec->hw_capable &&
927 radeon_hw_i2c &&
928 ((rdev->family <= CHIP_RS480) ||
929 ((rdev->family >= CHIP_RV515) && (rdev->family <= CHIP_R580))))) {
930 /* set the radeon hw i2c adapter */
931 snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
932 "Radeon i2c hw bus %s", name);
933 i2c->adapter.algo = &radeon_i2c_algo;
934 ret = i2c_add_adapter(&i2c->adapter);
935 if (ret)
936 goto out_free;
937 } else if (rec->hw_capable &&
938 radeon_hw_i2c &&
939 ASIC_IS_DCE3(rdev)) {
940 /* hw i2c using atom */
941 snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
942 "Radeon i2c hw bus %s", name);
943 i2c->adapter.algo = &radeon_atom_i2c_algo;
944 ret = i2c_add_adapter(&i2c->adapter);
945 if (ret)
946 goto out_free;
947 } else {
948 /* set the radeon bit adapter */
949 snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
950 "Radeon i2c bit bus %s", name);
951 i2c->adapter.algo_data = &i2c->bit;
952 i2c->bit.pre_xfer = pre_xfer;
953 i2c->bit.post_xfer = post_xfer;
954 i2c->bit.setsda = set_data;
955 i2c->bit.setscl = set_clock;
956 i2c->bit.getsda = get_data;
957 i2c->bit.getscl = get_clock;
958 i2c->bit.udelay = 10;
959 i2c->bit.timeout = usecs_to_jiffies(2200); /* from VESA */
960 i2c->bit.data = i2c;
961 ret = i2c_bit_add_bus(&i2c->adapter);
962 if (ret) {
963 DRM_ERROR("Failed to register bit i2c %s\n", name);
964 goto out_free;
965 }
966 }
967
968 return i2c;
969out_free:
970 kfree(i2c);
971 return NULL;
972
973}
974
975void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
976{
977 if (!i2c)
978 return;
979 WARN_ON(i2c->has_aux);
980 i2c_del_adapter(&i2c->adapter);
981 kfree(i2c);
982}
983
984/* Add the default buses */
985void radeon_i2c_init(struct radeon_device *rdev)
986{
987 if (radeon_hw_i2c)
988 DRM_INFO("hw_i2c forced on, you may experience display detection problems!\n");
989
990 if (rdev->is_atom_bios)
991 radeon_atombios_i2c_init(rdev);
992 else
993 radeon_combios_i2c_init(rdev);
994}
995
996/* remove all the buses */
997void radeon_i2c_fini(struct radeon_device *rdev)
998{
999 int i;
1000
1001 for (i = 0; i < RADEON_MAX_I2C_BUS; i++) {
1002 if (rdev->i2c_bus[i]) {
1003 radeon_i2c_destroy(rdev->i2c_bus[i]);
1004 rdev->i2c_bus[i] = NULL;
1005 }
1006 }
1007}
1008
1009/* Add additional buses */
1010void radeon_i2c_add(struct radeon_device *rdev,
1011 struct radeon_i2c_bus_rec *rec,
1012 const char *name)
1013{
1014 struct drm_device *dev = rdev->ddev;
1015 int i;
1016
1017 for (i = 0; i < RADEON_MAX_I2C_BUS; i++) {
1018 if (!rdev->i2c_bus[i]) {
1019 rdev->i2c_bus[i] = radeon_i2c_create(dev, rec, name);
1020 return;
1021 }
1022 }
1023}
1024
1025/* looks up bus based on id */
1026struct radeon_i2c_chan *radeon_i2c_lookup(struct radeon_device *rdev,
1027 struct radeon_i2c_bus_rec *i2c_bus)
1028{
1029 int i;
1030
1031 for (i = 0; i < RADEON_MAX_I2C_BUS; i++) {
1032 if (rdev->i2c_bus[i] &&
1033 (rdev->i2c_bus[i]->rec.i2c_id == i2c_bus->i2c_id)) {
1034 return rdev->i2c_bus[i];
1035 }
1036 }
1037 return NULL;
1038}
1039
1040void radeon_i2c_get_byte(struct radeon_i2c_chan *i2c_bus,
1041 u8 slave_addr,
1042 u8 addr,
1043 u8 *val)
1044{
1045 u8 out_buf[2];
1046 u8 in_buf[2];
1047 struct i2c_msg msgs[] = {
1048 {
1049 .addr = slave_addr,
1050 .flags = 0,
1051 .len = 1,
1052 .buf = out_buf,
1053 },
1054 {
1055 .addr = slave_addr,
1056 .flags = I2C_M_RD,
1057 .len = 1,
1058 .buf = in_buf,
1059 }
1060 };
1061
1062 out_buf[0] = addr;
1063 out_buf[1] = 0;
1064
1065 if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) {
1066 *val = in_buf[0];
1067 DRM_DEBUG("val = 0x%02x\n", *val);
1068 } else {
1069 DRM_DEBUG("i2c 0x%02x 0x%02x read failed\n",
1070 addr, *val);
1071 }
1072}
1073
1074void radeon_i2c_put_byte(struct radeon_i2c_chan *i2c_bus,
1075 u8 slave_addr,
1076 u8 addr,
1077 u8 val)
1078{
1079 uint8_t out_buf[2];
1080 struct i2c_msg msg = {
1081 .addr = slave_addr,
1082 .flags = 0,
1083 .len = 2,
1084 .buf = out_buf,
1085 };
1086
1087 out_buf[0] = addr;
1088 out_buf[1] = val;
1089
1090 if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1)
1091 DRM_DEBUG("i2c 0x%02x 0x%02x write failed\n",
1092 addr, val);
1093}
1094
1095/* ddc router switching */
1096void radeon_router_select_ddc_port(struct radeon_connector *radeon_connector)
1097{
1098 u8 val;
1099
1100 if (!radeon_connector->router.ddc_valid)
1101 return;
1102
1103 if (!radeon_connector->router_bus)
1104 return;
1105
1106 radeon_i2c_get_byte(radeon_connector->router_bus,
1107 radeon_connector->router.i2c_addr,
1108 0x3, &val);
1109 val &= ~radeon_connector->router.ddc_mux_control_pin;
1110 radeon_i2c_put_byte(radeon_connector->router_bus,
1111 radeon_connector->router.i2c_addr,
1112 0x3, val);
1113 radeon_i2c_get_byte(radeon_connector->router_bus,
1114 radeon_connector->router.i2c_addr,
1115 0x1, &val);
1116 val &= ~radeon_connector->router.ddc_mux_control_pin;
1117 val |= radeon_connector->router.ddc_mux_state;
1118 radeon_i2c_put_byte(radeon_connector->router_bus,
1119 radeon_connector->router.i2c_addr,
1120 0x1, val);
1121}
1122
1123/* clock/data router switching */
1124void radeon_router_select_cd_port(struct radeon_connector *radeon_connector)
1125{
1126 u8 val;
1127
1128 if (!radeon_connector->router.cd_valid)
1129 return;
1130
1131 if (!radeon_connector->router_bus)
1132 return;
1133
1134 radeon_i2c_get_byte(radeon_connector->router_bus,
1135 radeon_connector->router.i2c_addr,
1136 0x3, &val);
1137 val &= ~radeon_connector->router.cd_mux_control_pin;
1138 radeon_i2c_put_byte(radeon_connector->router_bus,
1139 radeon_connector->router.i2c_addr,
1140 0x3, val);
1141 radeon_i2c_get_byte(radeon_connector->router_bus,
1142 radeon_connector->router.i2c_addr,
1143 0x1, &val);
1144 val &= ~radeon_connector->router.cd_mux_control_pin;
1145 val |= radeon_connector->router.cd_mux_state;
1146 radeon_i2c_put_byte(radeon_connector->router_bus,
1147 radeon_connector->router.i2c_addr,
1148 0x1, val);
1149}
1150