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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 | */ | |
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))); | |
76 | } else { | |
77 | WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST | | |
78 | R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3))); | |
79 | } | |
80 | } | |
771fe6b9 | 81 | |
9b9fe724 AD |
82 | /* clear the output pin values */ |
83 | temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask; | |
84 | WREG32(rec->a_clk_reg, temp); | |
85 | ||
86 | temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask; | |
87 | WREG32(rec->a_data_reg, temp); | |
88 | ||
89 | ||
90 | /* mask the gpio pins for software use */ | |
771fe6b9 JG |
91 | temp = RREG32(rec->mask_clk_reg); |
92 | if (lock_state) | |
93 | temp |= rec->mask_clk_mask; | |
94 | else | |
95 | temp &= ~rec->mask_clk_mask; | |
96 | WREG32(rec->mask_clk_reg, temp); | |
97 | temp = RREG32(rec->mask_clk_reg); | |
98 | ||
99 | temp = RREG32(rec->mask_data_reg); | |
100 | if (lock_state) | |
101 | temp |= rec->mask_data_mask; | |
102 | else | |
103 | temp &= ~rec->mask_data_mask; | |
104 | WREG32(rec->mask_data_reg, temp); | |
105 | temp = RREG32(rec->mask_data_reg); | |
106 | } | |
107 | ||
108 | static int get_clock(void *i2c_priv) | |
109 | { | |
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; | |
113 | uint32_t val; | |
114 | ||
9b9fe724 AD |
115 | /* read the value off the pin */ |
116 | val = RREG32(rec->y_clk_reg); | |
117 | val &= rec->y_clk_mask; | |
771fe6b9 JG |
118 | |
119 | return (val != 0); | |
120 | } | |
121 | ||
122 | ||
123 | static int get_data(void *i2c_priv) | |
124 | { | |
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; | |
128 | uint32_t val; | |
129 | ||
9b9fe724 AD |
130 | /* read the value off the pin */ |
131 | val = RREG32(rec->y_data_reg); | |
132 | val &= rec->y_data_mask; | |
133 | ||
771fe6b9 JG |
134 | return (val != 0); |
135 | } | |
136 | ||
137 | static void set_clock(void *i2c_priv, int clock) | |
138 | { | |
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; | |
142 | uint32_t val; | |
143 | ||
9b9fe724 AD |
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); | |
771fe6b9 JG |
148 | } |
149 | ||
150 | static void set_data(void *i2c_priv, int data) | |
151 | { | |
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; | |
155 | uint32_t val; | |
156 | ||
9b9fe724 AD |
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); | |
771fe6b9 JG |
161 | } |
162 | ||
163 | struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, | |
ab1e9ea0 AD |
164 | struct radeon_i2c_bus_rec *rec, |
165 | const char *name) | |
771fe6b9 JG |
166 | { |
167 | struct radeon_i2c_chan *i2c; | |
168 | int ret; | |
169 | ||
9a298b2a | 170 | i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL); |
771fe6b9 JG |
171 | if (i2c == NULL) |
172 | return NULL; | |
173 | ||
174 | i2c->adapter.owner = THIS_MODULE; | |
175 | i2c->adapter.algo_data = &i2c->algo; | |
176 | i2c->dev = dev; | |
177 | i2c->algo.setsda = set_data; | |
178 | i2c->algo.setscl = set_clock; | |
179 | i2c->algo.getsda = get_data; | |
180 | i2c->algo.getscl = get_clock; | |
181 | i2c->algo.udelay = 20; | |
182 | /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always | |
183 | * make this, 2 jiffies is a lot more reliable */ | |
184 | i2c->algo.timeout = 2; | |
185 | i2c->algo.data = i2c; | |
186 | i2c->rec = *rec; | |
187 | i2c_set_adapdata(&i2c->adapter, i2c); | |
188 | ||
189 | ret = i2c_bit_add_bus(&i2c->adapter); | |
190 | if (ret) { | |
191 | DRM_INFO("Failed to register i2c %s\n", name); | |
192 | goto out_free; | |
193 | } | |
194 | ||
195 | return i2c; | |
196 | out_free: | |
9a298b2a | 197 | kfree(i2c); |
771fe6b9 JG |
198 | return NULL; |
199 | ||
200 | } | |
201 | ||
202 | void radeon_i2c_destroy(struct radeon_i2c_chan *i2c) | |
203 | { | |
204 | if (!i2c) | |
205 | return; | |
206 | ||
207 | i2c_del_adapter(&i2c->adapter); | |
9a298b2a | 208 | kfree(i2c); |
771fe6b9 JG |
209 | } |
210 | ||
211 | struct drm_encoder *radeon_best_encoder(struct drm_connector *connector) | |
212 | { | |
213 | return NULL; | |
214 | } |