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