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"
34 bool radeon_ddc_probe(struct radeon_connector
*radeon_connector
)
36 u8 out_buf
[] = { 0x0, 0x0};
39 struct i2c_msg msgs
[] = {
54 ret
= i2c_transfer(&radeon_connector
->ddc_bus
->adapter
, msgs
, 2);
62 void radeon_i2c_do_lock(struct radeon_i2c_chan
*i2c
, int lock_state
)
64 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
65 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
68 /* RV410 appears to have a bug where the hw i2c in reset
69 * holds the i2c port in a bad state - switch hw i2c away before
70 * doing DDC - do this for all r200s/r300s/r400s for safety sake
72 if ((rdev
->family
>= CHIP_R200
) && !ASIC_IS_AVIVO(rdev
)) {
73 if (rec
->a_clk_reg
== RADEON_GPIO_MONID
) {
74 WREG32(RADEON_DVI_I2C_CNTL_0
, (RADEON_I2C_SOFT_RST
|
75 R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1
)));
77 WREG32(RADEON_DVI_I2C_CNTL_0
, (RADEON_I2C_SOFT_RST
|
78 R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3
)));
82 /* clear the output pin values */
83 temp
= RREG32(rec
->a_clk_reg
) & ~rec
->a_clk_mask
;
84 WREG32(rec
->a_clk_reg
, temp
);
86 temp
= RREG32(rec
->a_data_reg
) & ~rec
->a_data_mask
;
87 WREG32(rec
->a_data_reg
, temp
);
90 /* mask the gpio pins for software use */
91 temp
= RREG32(rec
->mask_clk_reg
);
93 temp
|= rec
->mask_clk_mask
;
95 temp
&= ~rec
->mask_clk_mask
;
96 WREG32(rec
->mask_clk_reg
, temp
);
97 temp
= RREG32(rec
->mask_clk_reg
);
99 temp
= RREG32(rec
->mask_data_reg
);
101 temp
|= rec
->mask_data_mask
;
103 temp
&= ~rec
->mask_data_mask
;
104 WREG32(rec
->mask_data_reg
, temp
);
105 temp
= RREG32(rec
->mask_data_reg
);
108 static int get_clock(void *i2c_priv
)
110 struct radeon_i2c_chan
*i2c
= i2c_priv
;
111 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
112 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
115 /* read the value off the pin */
116 val
= RREG32(rec
->y_clk_reg
);
117 val
&= rec
->y_clk_mask
;
123 static int get_data(void *i2c_priv
)
125 struct radeon_i2c_chan
*i2c
= i2c_priv
;
126 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
127 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
130 /* read the value off the pin */
131 val
= RREG32(rec
->y_data_reg
);
132 val
&= rec
->y_data_mask
;
137 static void set_clock(void *i2c_priv
, int clock
)
139 struct radeon_i2c_chan
*i2c
= i2c_priv
;
140 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
141 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
144 /* set pin direction */
145 val
= RREG32(rec
->en_clk_reg
) & ~rec
->en_clk_mask
;
146 val
|= clock
? 0 : rec
->en_clk_mask
;
147 WREG32(rec
->en_clk_reg
, val
);
150 static void set_data(void *i2c_priv
, int data
)
152 struct radeon_i2c_chan
*i2c
= i2c_priv
;
153 struct radeon_device
*rdev
= i2c
->dev
->dev_private
;
154 struct radeon_i2c_bus_rec
*rec
= &i2c
->rec
;
157 /* set pin direction */
158 val
= RREG32(rec
->en_data_reg
) & ~rec
->en_data_mask
;
159 val
|= data
? 0 : rec
->en_data_mask
;
160 WREG32(rec
->en_data_reg
, val
);
163 struct radeon_i2c_chan
*radeon_i2c_create(struct drm_device
*dev
,
164 struct radeon_i2c_bus_rec
*rec
,
167 struct radeon_i2c_chan
*i2c
;
170 i2c
= kzalloc(sizeof(struct radeon_i2c_chan
), GFP_KERNEL
);
174 i2c
->adapter
.owner
= THIS_MODULE
;
176 i2c_set_adapdata(&i2c
->adapter
, i2c
);
177 i2c
->adapter
.algo_data
= &i2c
->algo
.bit
;
178 i2c
->algo
.bit
.setsda
= set_data
;
179 i2c
->algo
.bit
.setscl
= set_clock
;
180 i2c
->algo
.bit
.getsda
= get_data
;
181 i2c
->algo
.bit
.getscl
= get_clock
;
182 i2c
->algo
.bit
.udelay
= 20;
183 /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
184 * make this, 2 jiffies is a lot more reliable */
185 i2c
->algo
.bit
.timeout
= 2;
186 i2c
->algo
.bit
.data
= i2c
;
188 ret
= i2c_bit_add_bus(&i2c
->adapter
);
190 DRM_INFO("Failed to register i2c %s\n", name
);
201 struct radeon_i2c_chan
*radeon_i2c_create_dp(struct drm_device
*dev
,
202 const char *name
, bool dp
, u8 i2c_id
)
204 struct radeon_i2c_chan
*i2c
;
207 i2c
= kzalloc(sizeof(struct radeon_i2c_chan
), GFP_KERNEL
);
211 i2c
->i2c_id
= i2c_id
;
212 i2c
->adapter
.owner
= THIS_MODULE
;
214 i2c_set_adapdata(&i2c
->adapter
, i2c
);
215 i2c
->adapter
.algo_data
= &i2c
->algo
.dp
;
216 i2c
->algo
.dp
.aux_ch
= radeon_dp_i2c_aux_ch
;
217 i2c
->algo
.dp
.address
= 0;
218 ret
= i2c_dp_aux_add_bus(&i2c
->adapter
);
220 DRM_INFO("Failed to register i2c %s\n", name
);
232 void radeon_i2c_destroy(struct radeon_i2c_chan
*i2c
)
237 i2c_del_adapter(&i2c
->adapter
);
241 struct drm_encoder
*radeon_best_encoder(struct drm_connector
*connector
)
246 void radeon_i2c_sw_get_byte(struct radeon_i2c_chan
*i2c_bus
,
253 struct i2c_msg msgs
[] = {
271 if (i2c_transfer(&i2c_bus
->adapter
, msgs
, 2) == 2) {
273 DRM_DEBUG("val = 0x%02x\n", *val
);
275 DRM_ERROR("i2c 0x%02x 0x%02x read failed\n",
280 void radeon_i2c_sw_put_byte(struct radeon_i2c_chan
*i2c_bus
,
286 struct i2c_msg msg
= {
296 if (i2c_transfer(&i2c_bus
->adapter
, &msg
, 1) != 1)
297 DRM_ERROR("i2c 0x%02x 0x%02x write failed\n",
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