2 * Copyright 2007-8 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
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:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
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.
23 * Authors: Dave Airlie
27 #include "radeon_drm.h"
35 bool radeon_ddc_probe(struct radeon_connector
*radeon_connector
)
37 u8 out_buf
[] = { 0x0, 0x0};
40 struct i2c_msg msgs
[] = {
55 /* on hw with routers, select right port */
56 if (radeon_connector
->router
.ddc_valid
)
57 radeon_router_select_ddc_port(radeon_connector
);
59 ret
= i2c_transfer(&radeon_connector
->ddc_bus
->adapter
, msgs
, 2);
68 static void radeon_i2c_do_lock(struct radeon_i2c_chan
*i2c
, int lock_state
)
70 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
71 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
74 /* RV410 appears to have a bug where the hw i2c in reset
75 * holds the i2c port in a bad state - switch hw i2c away before
76 * doing DDC - do this for all r200s/r300s/r400s for safety sake
78 if (rec
->hw_capable
) {
79 if ((rdev
->family
>= CHIP_R200
) && !ASIC_IS_AVIVO(rdev
)) {
82 if (rdev
->family
>= CHIP_RV350
)
83 reg
= RADEON_GPIO_MONID
;
84 else if ((rdev
->family
== CHIP_R300
) ||
85 (rdev
->family
== CHIP_R350
))
86 reg
= RADEON_GPIO_DVI_DDC
;
88 reg
= RADEON_GPIO_CRT2_DDC
;
90 mutex_lock(&rdev
->dc_hw_i2c_mutex
);
91 if (rec
->a_clk_reg
== reg
) {
92 WREG32(RADEON_DVI_I2C_CNTL_0
, (RADEON_I2C_SOFT_RST
|
93 R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1
)));
95 WREG32(RADEON_DVI_I2C_CNTL_0
, (RADEON_I2C_SOFT_RST
|
96 R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3
)));
98 mutex_unlock(&rdev
->dc_hw_i2c_mutex
);
102 /* switch the pads to ddc mode */
103 if (ASIC_IS_DCE3(rdev
) && rec
->hw_capable
) {
104 temp
= RREG32(rec
->mask_clk_reg
);
106 WREG32(rec
->mask_clk_reg
, temp
);
109 /* clear the output pin values */
110 temp
= RREG32(rec
->a_clk_reg
) & ~rec
->a_clk_mask
;
111 WREG32(rec
->a_clk_reg
, temp
);
113 temp
= RREG32(rec
->a_data_reg
) & ~rec
->a_data_mask
;
114 WREG32(rec
->a_data_reg
, temp
);
116 /* set the pins to input */
117 temp
= RREG32(rec
->en_clk_reg
) & ~rec
->en_clk_mask
;
118 WREG32(rec
->en_clk_reg
, temp
);
120 temp
= RREG32(rec
->en_data_reg
) & ~rec
->en_data_mask
;
121 WREG32(rec
->en_data_reg
, temp
);
123 /* mask the gpio pins for software use */
124 temp
= RREG32(rec
->mask_clk_reg
);
126 temp
|= rec
->mask_clk_mask
;
128 temp
&= ~rec
->mask_clk_mask
;
129 WREG32(rec
->mask_clk_reg
, temp
);
130 temp
= RREG32(rec
->mask_clk_reg
);
132 temp
= RREG32(rec
->mask_data_reg
);
134 temp
|= rec
->mask_data_mask
;
136 temp
&= ~rec
->mask_data_mask
;
137 WREG32(rec
->mask_data_reg
, temp
);
138 temp
= RREG32(rec
->mask_data_reg
);
141 static int get_clock(void *i2c_priv
)
143 struct radeon_i2c_chan
*i2c
= i2c_priv
;
144 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
145 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
148 /* read the value off the pin */
149 val
= RREG32(rec
->y_clk_reg
);
150 val
&= rec
->y_clk_mask
;
156 static int get_data(void *i2c_priv
)
158 struct radeon_i2c_chan
*i2c
= i2c_priv
;
159 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
160 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
163 /* read the value off the pin */
164 val
= RREG32(rec
->y_data_reg
);
165 val
&= rec
->y_data_mask
;
170 static void set_clock(void *i2c_priv
, int clock
)
172 struct radeon_i2c_chan
*i2c
= i2c_priv
;
173 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
174 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
177 /* set pin direction */
178 val
= RREG32(rec
->en_clk_reg
) & ~rec
->en_clk_mask
;
179 val
|= clock
? 0 : rec
->en_clk_mask
;
180 WREG32(rec
->en_clk_reg
, val
);
183 static void set_data(void *i2c_priv
, int data
)
185 struct radeon_i2c_chan
*i2c
= i2c_priv
;
186 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
187 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
190 /* set pin direction */
191 val
= RREG32(rec
->en_data_reg
) & ~rec
->en_data_mask
;
192 val
|= data
? 0 : rec
->en_data_mask
;
193 WREG32(rec
->en_data_reg
, val
);
196 static int pre_xfer(struct i2c_adapter
*i2c_adap
)
198 struct radeon_i2c_chan
*i2c
= i2c_get_adapdata(i2c_adap
);
200 radeon_i2c_do_lock(i2c
, 1);
205 static void post_xfer(struct i2c_adapter
*i2c_adap
)
207 struct radeon_i2c_chan
*i2c
= i2c_get_adapdata(i2c_adap
);
209 radeon_i2c_do_lock(i2c
, 0);
214 static u32
radeon_get_i2c_prescale(struct radeon_device
*rdev
)
216 u32 sclk
= rdev
->pm
.current_sclk
;
222 switch (rdev
->family
) {
236 nm
= (sclk
* 10) / (i2c_clock
* 4);
237 for (loop
= 1; loop
< 255; loop
++) {
238 if ((nm
/ loop
) < loop
)
243 prescale
= m
| (n
<< 8);
251 prescale
= (((sclk
* 10)/(4 * 128 * 100) + 1) << 8) + 128;
265 if (rdev
->family
== CHIP_R520
)
266 prescale
= (127 << 8) + ((sclk
* 10) / (4 * 127 * i2c_clock
));
268 prescale
= (((sclk
* 10)/(4 * 128 * 100) + 1) << 8) + 128;
294 DRM_ERROR("i2c: unhandled radeon chip\n");
301 /* hw i2c engine for r1xx-4xx hardware
302 * hw can buffer up to 15 bytes
304 static int r100_hw_i2c_xfer(struct i2c_adapter
*i2c_adap
,
305 struct i2c_msg
*msgs
, int num
)
307 struct radeon_i2c_chan
*i2c
= i2c_get_adapdata(i2c_adap
);
308 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
309 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
311 int i
, j
, k
, ret
= num
;
313 u32 i2c_cntl_0
, i2c_cntl_1
, i2c_data
;
316 mutex_lock(&rdev
->dc_hw_i2c_mutex
);
317 /* take the pm lock since we need a constant sclk */
318 mutex_lock(&rdev
->pm
.mutex
);
320 prescale
= radeon_get_i2c_prescale(rdev
);
322 reg
= ((prescale
<< RADEON_I2C_PRESCALE_SHIFT
) |
323 RADEON_I2C_DRIVE_EN
|
328 if (rdev
->is_atom_bios
) {
329 tmp
= RREG32(RADEON_BIOS_6_SCRATCH
);
330 WREG32(RADEON_BIOS_6_SCRATCH
, tmp
| ATOM_S6_HW_I2C_BUSY_STATE
);
334 i2c_cntl_0
= RADEON_I2C_CNTL_0
;
335 i2c_cntl_1
= RADEON_I2C_CNTL_1
;
336 i2c_data
= RADEON_I2C_DATA
;
338 i2c_cntl_0
= RADEON_DVI_I2C_CNTL_0
;
339 i2c_cntl_1
= RADEON_DVI_I2C_CNTL_1
;
340 i2c_data
= RADEON_DVI_I2C_DATA
;
342 switch (rdev
->family
) {
349 switch (rec
->mask_clk_reg
) {
350 case RADEON_GPIO_DVI_DDC
:
351 /* no gpio select bit */
354 DRM_ERROR("gpio not supported with hw i2c\n");
360 /* only bit 4 on r200 */
361 switch (rec
->mask_clk_reg
) {
362 case RADEON_GPIO_DVI_DDC
:
363 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1
);
365 case RADEON_GPIO_MONID
:
366 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3
);
369 DRM_ERROR("gpio not supported with hw i2c\n");
377 switch (rec
->mask_clk_reg
) {
378 case RADEON_GPIO_DVI_DDC
:
379 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1
);
381 case RADEON_GPIO_VGA_DDC
:
382 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2
);
384 case RADEON_GPIO_CRT2_DDC
:
385 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3
);
388 DRM_ERROR("gpio not supported with hw i2c\n");
395 /* only bit 4 on r300/r350 */
396 switch (rec
->mask_clk_reg
) {
397 case RADEON_GPIO_VGA_DDC
:
398 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1
);
400 case RADEON_GPIO_DVI_DDC
:
401 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3
);
404 DRM_ERROR("gpio not supported with hw i2c\n");
417 switch (rec
->mask_clk_reg
) {
418 case RADEON_GPIO_VGA_DDC
:
419 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1
);
421 case RADEON_GPIO_DVI_DDC
:
422 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2
);
424 case RADEON_GPIO_MONID
:
425 reg
|= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3
);
428 DRM_ERROR("gpio not supported with hw i2c\n");
434 DRM_ERROR("unsupported asic\n");
441 /* check for bus probe */
443 if ((num
== 1) && (p
->len
== 0)) {
444 WREG32(i2c_cntl_0
, (RADEON_I2C_DONE
|
447 RADEON_I2C_SOFT_RST
));
448 WREG32(i2c_data
, (p
->addr
<< 1) & 0xff);
450 WREG32(i2c_cntl_1
, ((1 << RADEON_I2C_DATA_COUNT_SHIFT
) |
451 (1 << RADEON_I2C_ADDR_COUNT_SHIFT
) |
453 (48 << RADEON_I2C_TIME_LIMIT_SHIFT
)));
454 WREG32(i2c_cntl_0
, reg
);
455 for (k
= 0; k
< 32; k
++) {
457 tmp
= RREG32(i2c_cntl_0
);
458 if (tmp
& RADEON_I2C_GO
)
460 tmp
= RREG32(i2c_cntl_0
);
461 if (tmp
& RADEON_I2C_DONE
)
464 DRM_DEBUG("i2c write error 0x%08x\n", tmp
);
465 WREG32(i2c_cntl_0
, tmp
| RADEON_I2C_ABORT
);
473 for (i
= 0; i
< num
; i
++) {
475 for (j
= 0; j
< p
->len
; j
++) {
476 if (p
->flags
& I2C_M_RD
) {
477 WREG32(i2c_cntl_0
, (RADEON_I2C_DONE
|
480 RADEON_I2C_SOFT_RST
));
481 WREG32(i2c_data
, ((p
->addr
<< 1) & 0xff) | 0x1);
482 WREG32(i2c_cntl_1
, ((1 << RADEON_I2C_DATA_COUNT_SHIFT
) |
483 (1 << RADEON_I2C_ADDR_COUNT_SHIFT
) |
485 (48 << RADEON_I2C_TIME_LIMIT_SHIFT
)));
486 WREG32(i2c_cntl_0
, reg
| RADEON_I2C_RECEIVE
);
487 for (k
= 0; k
< 32; k
++) {
489 tmp
= RREG32(i2c_cntl_0
);
490 if (tmp
& RADEON_I2C_GO
)
492 tmp
= RREG32(i2c_cntl_0
);
493 if (tmp
& RADEON_I2C_DONE
)
496 DRM_DEBUG("i2c read error 0x%08x\n", tmp
);
497 WREG32(i2c_cntl_0
, tmp
| RADEON_I2C_ABORT
);
502 p
->buf
[j
] = RREG32(i2c_data
) & 0xff;
504 WREG32(i2c_cntl_0
, (RADEON_I2C_DONE
|
507 RADEON_I2C_SOFT_RST
));
508 WREG32(i2c_data
, (p
->addr
<< 1) & 0xff);
509 WREG32(i2c_data
, p
->buf
[j
]);
510 WREG32(i2c_cntl_1
, ((1 << RADEON_I2C_DATA_COUNT_SHIFT
) |
511 (1 << RADEON_I2C_ADDR_COUNT_SHIFT
) |
513 (48 << RADEON_I2C_TIME_LIMIT_SHIFT
)));
514 WREG32(i2c_cntl_0
, reg
);
515 for (k
= 0; k
< 32; k
++) {
517 tmp
= RREG32(i2c_cntl_0
);
518 if (tmp
& RADEON_I2C_GO
)
520 tmp
= RREG32(i2c_cntl_0
);
521 if (tmp
& RADEON_I2C_DONE
)
524 DRM_DEBUG("i2c write error 0x%08x\n", tmp
);
525 WREG32(i2c_cntl_0
, tmp
| RADEON_I2C_ABORT
);
535 WREG32(i2c_cntl_0
, 0);
536 WREG32(i2c_cntl_1
, 0);
537 WREG32(i2c_cntl_0
, (RADEON_I2C_DONE
|
540 RADEON_I2C_SOFT_RST
));
542 if (rdev
->is_atom_bios
) {
543 tmp
= RREG32(RADEON_BIOS_6_SCRATCH
);
544 tmp
&= ~ATOM_S6_HW_I2C_BUSY_STATE
;
545 WREG32(RADEON_BIOS_6_SCRATCH
, tmp
);
548 mutex_unlock(&rdev
->pm
.mutex
);
549 mutex_unlock(&rdev
->dc_hw_i2c_mutex
);
554 /* hw i2c engine for r5xx hardware
555 * hw can buffer up to 15 bytes
557 static int r500_hw_i2c_xfer(struct i2c_adapter
*i2c_adap
,
558 struct i2c_msg
*msgs
, int num
)
560 struct radeon_i2c_chan
*i2c
= i2c_get_adapdata(i2c_adap
);
561 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
562 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
564 int i
, j
, remaining
, current_count
, buffer_offset
, ret
= num
;
569 mutex_lock(&rdev
->dc_hw_i2c_mutex
);
570 /* take the pm lock since we need a constant sclk */
571 mutex_lock(&rdev
->pm
.mutex
);
573 prescale
= radeon_get_i2c_prescale(rdev
);
575 /* clear gpio mask bits */
576 tmp
= RREG32(rec
->mask_clk_reg
);
577 tmp
&= ~rec
->mask_clk_mask
;
578 WREG32(rec
->mask_clk_reg
, tmp
);
579 tmp
= RREG32(rec
->mask_clk_reg
);
581 tmp
= RREG32(rec
->mask_data_reg
);
582 tmp
&= ~rec
->mask_data_mask
;
583 WREG32(rec
->mask_data_reg
, tmp
);
584 tmp
= RREG32(rec
->mask_data_reg
);
586 /* clear pin values */
587 tmp
= RREG32(rec
->a_clk_reg
);
588 tmp
&= ~rec
->a_clk_mask
;
589 WREG32(rec
->a_clk_reg
, tmp
);
590 tmp
= RREG32(rec
->a_clk_reg
);
592 tmp
= RREG32(rec
->a_data_reg
);
593 tmp
&= ~rec
->a_data_mask
;
594 WREG32(rec
->a_data_reg
, tmp
);
595 tmp
= RREG32(rec
->a_data_reg
);
597 /* set the pins to input */
598 tmp
= RREG32(rec
->en_clk_reg
);
599 tmp
&= ~rec
->en_clk_mask
;
600 WREG32(rec
->en_clk_reg
, tmp
);
601 tmp
= RREG32(rec
->en_clk_reg
);
603 tmp
= RREG32(rec
->en_data_reg
);
604 tmp
&= ~rec
->en_data_mask
;
605 WREG32(rec
->en_data_reg
, tmp
);
606 tmp
= RREG32(rec
->en_data_reg
);
609 tmp
= RREG32(RADEON_BIOS_6_SCRATCH
);
610 WREG32(RADEON_BIOS_6_SCRATCH
, tmp
| ATOM_S6_HW_I2C_BUSY_STATE
);
611 saved1
= RREG32(AVIVO_DC_I2C_CONTROL1
);
612 saved2
= RREG32(0x494);
613 WREG32(0x494, saved2
| 0x1);
615 WREG32(AVIVO_DC_I2C_ARBITRATION
, AVIVO_DC_I2C_SW_WANTS_TO_USE_I2C
);
616 for (i
= 0; i
< 50; i
++) {
618 if (RREG32(AVIVO_DC_I2C_ARBITRATION
) & AVIVO_DC_I2C_SW_CAN_USE_I2C
)
622 DRM_ERROR("failed to get i2c bus\n");
627 reg
= AVIVO_DC_I2C_START
| AVIVO_DC_I2C_STOP
| AVIVO_DC_I2C_EN
;
628 switch (rec
->mask_clk_reg
) {
629 case AVIVO_DC_GPIO_DDC1_MASK
:
630 reg
|= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC1
);
632 case AVIVO_DC_GPIO_DDC2_MASK
:
633 reg
|= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC2
);
635 case AVIVO_DC_GPIO_DDC3_MASK
:
636 reg
|= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC3
);
639 DRM_ERROR("gpio not supported with hw i2c\n");
644 /* check for bus probe */
646 if ((num
== 1) && (p
->len
== 0)) {
647 WREG32(AVIVO_DC_I2C_STATUS1
, (AVIVO_DC_I2C_DONE
|
650 WREG32(AVIVO_DC_I2C_RESET
, AVIVO_DC_I2C_SOFT_RESET
);
652 WREG32(AVIVO_DC_I2C_RESET
, 0);
654 WREG32(AVIVO_DC_I2C_DATA
, (p
->addr
<< 1) & 0xff);
655 WREG32(AVIVO_DC_I2C_DATA
, 0);
657 WREG32(AVIVO_DC_I2C_CONTROL3
, AVIVO_DC_I2C_TIME_LIMIT(48));
658 WREG32(AVIVO_DC_I2C_CONTROL2
, (AVIVO_DC_I2C_ADDR_COUNT(1) |
659 AVIVO_DC_I2C_DATA_COUNT(1) |
661 WREG32(AVIVO_DC_I2C_CONTROL1
, reg
);
662 WREG32(AVIVO_DC_I2C_STATUS1
, AVIVO_DC_I2C_GO
);
663 for (j
= 0; j
< 200; j
++) {
665 tmp
= RREG32(AVIVO_DC_I2C_STATUS1
);
666 if (tmp
& AVIVO_DC_I2C_GO
)
668 tmp
= RREG32(AVIVO_DC_I2C_STATUS1
);
669 if (tmp
& AVIVO_DC_I2C_DONE
)
672 DRM_DEBUG("i2c write error 0x%08x\n", tmp
);
673 WREG32(AVIVO_DC_I2C_RESET
, AVIVO_DC_I2C_ABORT
);
681 for (i
= 0; i
< num
; i
++) {
685 if (p
->flags
& I2C_M_RD
) {
690 current_count
= remaining
;
691 WREG32(AVIVO_DC_I2C_STATUS1
, (AVIVO_DC_I2C_DONE
|
694 WREG32(AVIVO_DC_I2C_RESET
, AVIVO_DC_I2C_SOFT_RESET
);
696 WREG32(AVIVO_DC_I2C_RESET
, 0);
698 WREG32(AVIVO_DC_I2C_DATA
, ((p
->addr
<< 1) & 0xff) | 0x1);
699 WREG32(AVIVO_DC_I2C_CONTROL3
, AVIVO_DC_I2C_TIME_LIMIT(48));
700 WREG32(AVIVO_DC_I2C_CONTROL2
, (AVIVO_DC_I2C_ADDR_COUNT(1) |
701 AVIVO_DC_I2C_DATA_COUNT(current_count
) |
703 WREG32(AVIVO_DC_I2C_CONTROL1
, reg
| AVIVO_DC_I2C_RECEIVE
);
704 WREG32(AVIVO_DC_I2C_STATUS1
, AVIVO_DC_I2C_GO
);
705 for (j
= 0; j
< 200; j
++) {
707 tmp
= RREG32(AVIVO_DC_I2C_STATUS1
);
708 if (tmp
& AVIVO_DC_I2C_GO
)
710 tmp
= RREG32(AVIVO_DC_I2C_STATUS1
);
711 if (tmp
& AVIVO_DC_I2C_DONE
)
714 DRM_DEBUG("i2c read error 0x%08x\n", tmp
);
715 WREG32(AVIVO_DC_I2C_RESET
, AVIVO_DC_I2C_ABORT
);
720 for (j
= 0; j
< current_count
; j
++)
721 p
->buf
[buffer_offset
+ j
] = RREG32(AVIVO_DC_I2C_DATA
) & 0xff;
722 remaining
-= current_count
;
723 buffer_offset
+= current_count
;
730 current_count
= remaining
;
731 WREG32(AVIVO_DC_I2C_STATUS1
, (AVIVO_DC_I2C_DONE
|
734 WREG32(AVIVO_DC_I2C_RESET
, AVIVO_DC_I2C_SOFT_RESET
);
736 WREG32(AVIVO_DC_I2C_RESET
, 0);
738 WREG32(AVIVO_DC_I2C_DATA
, (p
->addr
<< 1) & 0xff);
739 for (j
= 0; j
< current_count
; j
++)
740 WREG32(AVIVO_DC_I2C_DATA
, p
->buf
[buffer_offset
+ j
]);
742 WREG32(AVIVO_DC_I2C_CONTROL3
, AVIVO_DC_I2C_TIME_LIMIT(48));
743 WREG32(AVIVO_DC_I2C_CONTROL2
, (AVIVO_DC_I2C_ADDR_COUNT(1) |
744 AVIVO_DC_I2C_DATA_COUNT(current_count
) |
746 WREG32(AVIVO_DC_I2C_CONTROL1
, reg
);
747 WREG32(AVIVO_DC_I2C_STATUS1
, AVIVO_DC_I2C_GO
);
748 for (j
= 0; j
< 200; j
++) {
750 tmp
= RREG32(AVIVO_DC_I2C_STATUS1
);
751 if (tmp
& AVIVO_DC_I2C_GO
)
753 tmp
= RREG32(AVIVO_DC_I2C_STATUS1
);
754 if (tmp
& AVIVO_DC_I2C_DONE
)
757 DRM_DEBUG("i2c write error 0x%08x\n", tmp
);
758 WREG32(AVIVO_DC_I2C_RESET
, AVIVO_DC_I2C_ABORT
);
763 remaining
-= current_count
;
764 buffer_offset
+= current_count
;
770 WREG32(AVIVO_DC_I2C_STATUS1
, (AVIVO_DC_I2C_DONE
|
773 WREG32(AVIVO_DC_I2C_RESET
, AVIVO_DC_I2C_SOFT_RESET
);
775 WREG32(AVIVO_DC_I2C_RESET
, 0);
777 WREG32(AVIVO_DC_I2C_ARBITRATION
, AVIVO_DC_I2C_SW_DONE_USING_I2C
);
778 WREG32(AVIVO_DC_I2C_CONTROL1
, saved1
);
779 WREG32(0x494, saved2
);
780 tmp
= RREG32(RADEON_BIOS_6_SCRATCH
);
781 tmp
&= ~ATOM_S6_HW_I2C_BUSY_STATE
;
782 WREG32(RADEON_BIOS_6_SCRATCH
, tmp
);
784 mutex_unlock(&rdev
->pm
.mutex
);
785 mutex_unlock(&rdev
->dc_hw_i2c_mutex
);
790 static int radeon_hw_i2c_xfer(struct i2c_adapter
*i2c_adap
,
791 struct i2c_msg
*msgs
, int num
)
793 struct radeon_i2c_chan
*i2c
= i2c_get_adapdata(i2c_adap
);
794 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
795 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
798 switch (rdev
->family
) {
817 ret
= r100_hw_i2c_xfer(i2c_adap
, msgs
, num
);
822 /* XXX fill in hw i2c implementation */
831 ret
= r100_hw_i2c_xfer(i2c_adap
, msgs
, num
);
833 ret
= r500_hw_i2c_xfer(i2c_adap
, msgs
, num
);
839 /* XXX fill in hw i2c implementation */
849 /* XXX fill in hw i2c implementation */
856 /* XXX fill in hw i2c implementation */
859 DRM_ERROR("i2c: unhandled radeon chip\n");
867 static u32
radeon_hw_i2c_func(struct i2c_adapter
*adap
)
869 return I2C_FUNC_I2C
| I2C_FUNC_SMBUS_EMUL
;
872 static const struct i2c_algorithm radeon_i2c_algo
= {
873 .master_xfer
= radeon_hw_i2c_xfer
,
874 .functionality
= radeon_hw_i2c_func
,
877 struct radeon_i2c_chan
*radeon_i2c_create(struct drm_device
*dev
,
878 struct radeon_i2c_bus_rec
*rec
,
881 struct radeon_device
*rdev
= dev
->dev_private
;
882 struct radeon_i2c_chan
*i2c
;
885 i2c
= kzalloc(sizeof(struct radeon_i2c_chan
), GFP_KERNEL
);
890 i2c
->adapter
.owner
= THIS_MODULE
;
891 i2c
->adapter
.class = I2C_CLASS_DDC
;
893 i2c_set_adapdata(&i2c
->adapter
, i2c
);
897 ((rdev
->family
<= CHIP_RS480
) ||
898 ((rdev
->family
>= CHIP_RV515
) && (rdev
->family
<= CHIP_R580
))))) {
899 /* set the radeon hw i2c adapter */
900 snprintf(i2c
->adapter
.name
, sizeof(i2c
->adapter
.name
),
901 "Radeon i2c hw bus %s", name
);
902 i2c
->adapter
.algo
= &radeon_i2c_algo
;
903 ret
= i2c_add_adapter(&i2c
->adapter
);
905 DRM_ERROR("Failed to register hw i2c %s\n", name
);
909 /* set the radeon bit adapter */
910 snprintf(i2c
->adapter
.name
, sizeof(i2c
->adapter
.name
),
911 "Radeon i2c bit bus %s", name
);
912 i2c
->adapter
.algo_data
= &i2c
->algo
.bit
;
913 i2c
->algo
.bit
.pre_xfer
= pre_xfer
;
914 i2c
->algo
.bit
.post_xfer
= post_xfer
;
915 i2c
->algo
.bit
.setsda
= set_data
;
916 i2c
->algo
.bit
.setscl
= set_clock
;
917 i2c
->algo
.bit
.getsda
= get_data
;
918 i2c
->algo
.bit
.getscl
= get_clock
;
919 i2c
->algo
.bit
.udelay
= 20;
920 /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
921 * make this, 2 jiffies is a lot more reliable */
922 i2c
->algo
.bit
.timeout
= 2;
923 i2c
->algo
.bit
.data
= i2c
;
924 ret
= i2c_bit_add_bus(&i2c
->adapter
);
926 DRM_ERROR("Failed to register bit i2c %s\n", name
);
938 struct radeon_i2c_chan
*radeon_i2c_create_dp(struct drm_device
*dev
,
939 struct radeon_i2c_bus_rec
*rec
,
942 struct radeon_i2c_chan
*i2c
;
945 i2c
= kzalloc(sizeof(struct radeon_i2c_chan
), GFP_KERNEL
);
950 i2c
->adapter
.owner
= THIS_MODULE
;
951 i2c
->adapter
.class = I2C_CLASS_DDC
;
953 snprintf(i2c
->adapter
.name
, sizeof(i2c
->adapter
.name
),
954 "Radeon aux bus %s", name
);
955 i2c_set_adapdata(&i2c
->adapter
, i2c
);
956 i2c
->adapter
.algo_data
= &i2c
->algo
.dp
;
957 i2c
->algo
.dp
.aux_ch
= radeon_dp_i2c_aux_ch
;
958 i2c
->algo
.dp
.address
= 0;
959 ret
= i2c_dp_aux_add_bus(&i2c
->adapter
);
961 DRM_INFO("Failed to register i2c %s\n", name
);
972 void radeon_i2c_destroy(struct radeon_i2c_chan
*i2c
)
976 i2c_del_adapter(&i2c
->adapter
);
980 /* Add the default buses */
981 void radeon_i2c_init(struct radeon_device
*rdev
)
983 if (rdev
->is_atom_bios
)
984 radeon_atombios_i2c_init(rdev
);
986 radeon_combios_i2c_init(rdev
);
989 /* remove all the buses */
990 void radeon_i2c_fini(struct radeon_device
*rdev
)
994 for (i
= 0; i
< RADEON_MAX_I2C_BUS
; i
++) {
995 if (rdev
->i2c_bus
[i
]) {
996 radeon_i2c_destroy(rdev
->i2c_bus
[i
]);
997 rdev
->i2c_bus
[i
] = NULL
;
1002 /* Add additional buses */
1003 void radeon_i2c_add(struct radeon_device
*rdev
,
1004 struct radeon_i2c_bus_rec
*rec
,
1007 struct drm_device
*dev
= rdev
->ddev
;
1010 for (i
= 0; i
< RADEON_MAX_I2C_BUS
; i
++) {
1011 if (!rdev
->i2c_bus
[i
]) {
1012 rdev
->i2c_bus
[i
] = radeon_i2c_create(dev
, rec
, name
);
1018 /* looks up bus based on id */
1019 struct radeon_i2c_chan
*radeon_i2c_lookup(struct radeon_device
*rdev
,
1020 struct radeon_i2c_bus_rec
*i2c_bus
)
1024 for (i
= 0; i
< RADEON_MAX_I2C_BUS
; i
++) {
1025 if (rdev
->i2c_bus
[i
] &&
1026 (rdev
->i2c_bus
[i
]->rec
.i2c_id
== i2c_bus
->i2c_id
)) {
1027 return rdev
->i2c_bus
[i
];
1033 struct drm_encoder
*radeon_best_encoder(struct drm_connector
*connector
)
1038 void radeon_i2c_get_byte(struct radeon_i2c_chan
*i2c_bus
,
1045 struct i2c_msg msgs
[] = {
1063 if (i2c_transfer(&i2c_bus
->adapter
, msgs
, 2) == 2) {
1065 DRM_DEBUG("val = 0x%02x\n", *val
);
1067 DRM_DEBUG("i2c 0x%02x 0x%02x read failed\n",
1072 void radeon_i2c_put_byte(struct radeon_i2c_chan
*i2c_bus
,
1078 struct i2c_msg msg
= {
1088 if (i2c_transfer(&i2c_bus
->adapter
, &msg
, 1) != 1)
1089 DRM_DEBUG("i2c 0x%02x 0x%02x write failed\n",
1093 /* ddc router switching */
1094 void radeon_router_select_ddc_port(struct radeon_connector
*radeon_connector
)
1098 if (!radeon_connector
->router
.ddc_valid
)
1101 if (!radeon_connector
->router_bus
)
1104 radeon_i2c_get_byte(radeon_connector
->router_bus
,
1105 radeon_connector
->router
.i2c_addr
,
1107 val
&= ~radeon_connector
->router
.ddc_mux_control_pin
;
1108 radeon_i2c_put_byte(radeon_connector
->router_bus
,
1109 radeon_connector
->router
.i2c_addr
,
1111 radeon_i2c_get_byte(radeon_connector
->router_bus
,
1112 radeon_connector
->router
.i2c_addr
,
1114 val
&= ~radeon_connector
->router
.ddc_mux_control_pin
;
1115 val
|= radeon_connector
->router
.ddc_mux_state
;
1116 radeon_i2c_put_byte(radeon_connector
->router_bus
,
1117 radeon_connector
->router
.i2c_addr
,
1121 /* clock/data router switching */
1122 void radeon_router_select_cd_port(struct radeon_connector
*radeon_connector
)
1126 if (!radeon_connector
->router
.cd_valid
)
1129 if (!radeon_connector
->router_bus
)
1132 radeon_i2c_get_byte(radeon_connector
->router_bus
,
1133 radeon_connector
->router
.i2c_addr
,
1135 val
&= ~radeon_connector
->router
.cd_mux_control_pin
;
1136 radeon_i2c_put_byte(radeon_connector
->router_bus
,
1137 radeon_connector
->router
.i2c_addr
,
1139 radeon_i2c_get_byte(radeon_connector
->router_bus
,
1140 radeon_connector
->router
.i2c_addr
,
1142 val
&= ~radeon_connector
->router
.cd_mux_control_pin
;
1143 val
|= radeon_connector
->router
.cd_mux_state
;
1144 radeon_i2c_put_byte(radeon_connector
->router_bus
,
1145 radeon_connector
->router
.i2c_addr
,