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771fe6b9 JG |
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 | ||
30 | /** | |
31 | * radeon_ddc_probe | |
32 | * | |
33 | */ | |
34 | bool radeon_ddc_probe(struct radeon_connector *radeon_connector) | |
35 | { | |
36 | u8 out_buf[] = { 0x0, 0x0}; | |
37 | u8 buf[2]; | |
38 | int ret; | |
39 | struct i2c_msg msgs[] = { | |
40 | { | |
41 | .addr = 0x50, | |
42 | .flags = 0, | |
43 | .len = 1, | |
44 | .buf = out_buf, | |
45 | }, | |
46 | { | |
47 | .addr = 0x50, | |
48 | .flags = I2C_M_RD, | |
49 | .len = 1, | |
50 | .buf = buf, | |
51 | } | |
52 | }; | |
53 | ||
54 | ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2); | |
55 | if (ret == 2) | |
56 | return true; | |
57 | ||
58 | return false; | |
59 | } | |
60 | ||
61 | ||
ab1e9ea0 | 62 | void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state) |
771fe6b9 | 63 | { |
ab1e9ea0 AD |
64 | struct radeon_device *rdev = i2c->dev->dev_private; |
65 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
771fe6b9 | 66 | uint32_t temp; |
771fe6b9 JG |
67 | |
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 | |
71 | */ | |
6a93cb25 AD |
72 | if (rec->hw_capable) { |
73 | if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) { | |
74 | if (rec->a_clk_reg == RADEON_GPIO_MONID) { | |
75 | WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST | | |
76 | R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1))); | |
77 | } else { | |
78 | WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST | | |
79 | R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3))); | |
80 | } | |
771fe6b9 JG |
81 | } |
82 | } | |
771fe6b9 | 83 | |
9b9fe724 AD |
84 | /* clear the output pin values */ |
85 | temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask; | |
86 | WREG32(rec->a_clk_reg, temp); | |
87 | ||
88 | temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask; | |
89 | WREG32(rec->a_data_reg, temp); | |
90 | ||
6a93cb25 AD |
91 | /* set the pins to input */ |
92 | temp = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask; | |
93 | WREG32(rec->en_clk_reg, temp); | |
94 | ||
95 | temp = RREG32(rec->en_data_reg) & ~rec->en_data_mask; | |
96 | WREG32(rec->en_data_reg, temp); | |
9b9fe724 AD |
97 | |
98 | /* mask the gpio pins for software use */ | |
771fe6b9 JG |
99 | temp = RREG32(rec->mask_clk_reg); |
100 | if (lock_state) | |
101 | temp |= rec->mask_clk_mask; | |
102 | else | |
103 | temp &= ~rec->mask_clk_mask; | |
104 | WREG32(rec->mask_clk_reg, temp); | |
105 | temp = RREG32(rec->mask_clk_reg); | |
106 | ||
107 | temp = RREG32(rec->mask_data_reg); | |
108 | if (lock_state) | |
109 | temp |= rec->mask_data_mask; | |
110 | else | |
111 | temp &= ~rec->mask_data_mask; | |
112 | WREG32(rec->mask_data_reg, temp); | |
113 | temp = RREG32(rec->mask_data_reg); | |
114 | } | |
115 | ||
116 | static int get_clock(void *i2c_priv) | |
117 | { | |
118 | struct radeon_i2c_chan *i2c = i2c_priv; | |
119 | struct radeon_device *rdev = i2c->dev->dev_private; | |
120 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
121 | uint32_t val; | |
122 | ||
9b9fe724 AD |
123 | /* read the value off the pin */ |
124 | val = RREG32(rec->y_clk_reg); | |
125 | val &= rec->y_clk_mask; | |
771fe6b9 JG |
126 | |
127 | return (val != 0); | |
128 | } | |
129 | ||
130 | ||
131 | static int get_data(void *i2c_priv) | |
132 | { | |
133 | struct radeon_i2c_chan *i2c = i2c_priv; | |
134 | struct radeon_device *rdev = i2c->dev->dev_private; | |
135 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
136 | uint32_t val; | |
137 | ||
9b9fe724 AD |
138 | /* read the value off the pin */ |
139 | val = RREG32(rec->y_data_reg); | |
140 | val &= rec->y_data_mask; | |
141 | ||
771fe6b9 JG |
142 | return (val != 0); |
143 | } | |
144 | ||
145 | static void set_clock(void *i2c_priv, int clock) | |
146 | { | |
147 | struct radeon_i2c_chan *i2c = i2c_priv; | |
148 | struct radeon_device *rdev = i2c->dev->dev_private; | |
149 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
150 | uint32_t val; | |
151 | ||
9b9fe724 AD |
152 | /* set pin direction */ |
153 | val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask; | |
154 | val |= clock ? 0 : rec->en_clk_mask; | |
155 | WREG32(rec->en_clk_reg, val); | |
771fe6b9 JG |
156 | } |
157 | ||
158 | static void set_data(void *i2c_priv, int data) | |
159 | { | |
160 | struct radeon_i2c_chan *i2c = i2c_priv; | |
161 | struct radeon_device *rdev = i2c->dev->dev_private; | |
162 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
163 | uint32_t val; | |
164 | ||
9b9fe724 AD |
165 | /* set pin direction */ |
166 | val = RREG32(rec->en_data_reg) & ~rec->en_data_mask; | |
167 | val |= data ? 0 : rec->en_data_mask; | |
168 | WREG32(rec->en_data_reg, val); | |
771fe6b9 JG |
169 | } |
170 | ||
171 | struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, | |
ab1e9ea0 AD |
172 | struct radeon_i2c_bus_rec *rec, |
173 | const char *name) | |
771fe6b9 JG |
174 | { |
175 | struct radeon_i2c_chan *i2c; | |
176 | int ret; | |
177 | ||
9a298b2a | 178 | i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL); |
771fe6b9 JG |
179 | if (i2c == NULL) |
180 | return NULL; | |
181 | ||
182 | i2c->adapter.owner = THIS_MODULE; | |
771fe6b9 | 183 | i2c->dev = dev; |
746c1aa4 DA |
184 | i2c_set_adapdata(&i2c->adapter, i2c); |
185 | i2c->adapter.algo_data = &i2c->algo.bit; | |
186 | i2c->algo.bit.setsda = set_data; | |
187 | i2c->algo.bit.setscl = set_clock; | |
188 | i2c->algo.bit.getsda = get_data; | |
189 | i2c->algo.bit.getscl = get_clock; | |
190 | i2c->algo.bit.udelay = 20; | |
771fe6b9 JG |
191 | /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always |
192 | * make this, 2 jiffies is a lot more reliable */ | |
746c1aa4 DA |
193 | i2c->algo.bit.timeout = 2; |
194 | i2c->algo.bit.data = i2c; | |
771fe6b9 | 195 | i2c->rec = *rec; |
771fe6b9 JG |
196 | ret = i2c_bit_add_bus(&i2c->adapter); |
197 | if (ret) { | |
198 | DRM_INFO("Failed to register i2c %s\n", name); | |
199 | goto out_free; | |
200 | } | |
201 | ||
202 | return i2c; | |
203 | out_free: | |
9a298b2a | 204 | kfree(i2c); |
771fe6b9 JG |
205 | return NULL; |
206 | ||
207 | } | |
208 | ||
746c1aa4 | 209 | struct radeon_i2c_chan *radeon_i2c_create_dp(struct drm_device *dev, |
6a93cb25 AD |
210 | struct radeon_i2c_bus_rec *rec, |
211 | const char *name) | |
746c1aa4 DA |
212 | { |
213 | struct radeon_i2c_chan *i2c; | |
214 | int ret; | |
215 | ||
216 | i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL); | |
217 | if (i2c == NULL) | |
218 | return NULL; | |
219 | ||
6a93cb25 | 220 | i2c->rec = *rec; |
746c1aa4 DA |
221 | i2c->adapter.owner = THIS_MODULE; |
222 | i2c->dev = dev; | |
223 | i2c_set_adapdata(&i2c->adapter, i2c); | |
224 | i2c->adapter.algo_data = &i2c->algo.dp; | |
225 | i2c->algo.dp.aux_ch = radeon_dp_i2c_aux_ch; | |
226 | i2c->algo.dp.address = 0; | |
227 | ret = i2c_dp_aux_add_bus(&i2c->adapter); | |
228 | if (ret) { | |
229 | DRM_INFO("Failed to register i2c %s\n", name); | |
230 | goto out_free; | |
231 | } | |
232 | ||
233 | return i2c; | |
234 | out_free: | |
235 | kfree(i2c); | |
236 | return NULL; | |
237 | ||
238 | } | |
239 | ||
240 | ||
771fe6b9 JG |
241 | void radeon_i2c_destroy(struct radeon_i2c_chan *i2c) |
242 | { | |
243 | if (!i2c) | |
244 | return; | |
245 | ||
246 | i2c_del_adapter(&i2c->adapter); | |
9a298b2a | 247 | kfree(i2c); |
771fe6b9 JG |
248 | } |
249 | ||
250 | struct drm_encoder *radeon_best_encoder(struct drm_connector *connector) | |
251 | { | |
252 | return NULL; | |
253 | } | |
fcec570b AD |
254 | |
255 | void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus, | |
256 | u8 slave_addr, | |
257 | u8 addr, | |
258 | u8 *val) | |
259 | { | |
260 | u8 out_buf[2]; | |
261 | u8 in_buf[2]; | |
262 | struct i2c_msg msgs[] = { | |
263 | { | |
264 | .addr = slave_addr, | |
265 | .flags = 0, | |
266 | .len = 1, | |
267 | .buf = out_buf, | |
268 | }, | |
269 | { | |
270 | .addr = slave_addr, | |
271 | .flags = I2C_M_RD, | |
272 | .len = 1, | |
273 | .buf = in_buf, | |
274 | } | |
275 | }; | |
276 | ||
277 | out_buf[0] = addr; | |
278 | out_buf[1] = 0; | |
279 | ||
280 | if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) { | |
281 | *val = in_buf[0]; | |
282 | DRM_DEBUG("val = 0x%02x\n", *val); | |
283 | } else { | |
284 | DRM_ERROR("i2c 0x%02x 0x%02x read failed\n", | |
285 | addr, *val); | |
286 | } | |
287 | } | |
288 | ||
289 | void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c_bus, | |
290 | u8 slave_addr, | |
291 | u8 addr, | |
292 | u8 val) | |
293 | { | |
294 | uint8_t out_buf[2]; | |
295 | struct i2c_msg msg = { | |
296 | .addr = slave_addr, | |
297 | .flags = 0, | |
298 | .len = 2, | |
299 | .buf = out_buf, | |
300 | }; | |
301 | ||
302 | out_buf[0] = addr; | |
303 | out_buf[1] = val; | |
304 | ||
305 | if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1) | |
306 | DRM_ERROR("i2c 0x%02x 0x%02x write failed\n", | |
307 | addr, val); | |
308 | } | |
309 |