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1123 | serge | 1 | /* |
2 | * Copyright 2007-8 Advanced Micro Devices, Inc. |
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3 | * Copyright 2008 Red Hat Inc. |
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4 | * |
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5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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6 | * copy of this software and associated documentation files (the "Software"), |
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7 | * to deal in the Software without restriction, including without limitation |
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8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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9 | * and/or sell copies of the Software, and to permit persons to whom the |
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10 | * Software is furnished to do so, subject to the following conditions: |
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11 | * |
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12 | * The above copyright notice and this permission notice shall be included in |
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13 | * all copies or substantial portions of the Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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21 | * OTHER DEALINGS IN THE SOFTWARE. |
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22 | * |
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23 | * Authors: Dave Airlie |
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24 | * Alex Deucher |
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25 | */ |
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26 | #include "drmP.h" |
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27 | #include "radeon_drm.h" |
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28 | #include "radeon.h" |
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29 | |||
30 | /** |
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31 | * radeon_ddc_probe |
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32 | * |
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33 | */ |
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34 | bool radeon_ddc_probe(struct radeon_connector *radeon_connector) |
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35 | { |
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36 | u8 out_buf[] = { 0x0, 0x0}; |
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37 | u8 buf[2]; |
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38 | int ret; |
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39 | struct i2c_msg msgs[] = { |
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40 | { |
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41 | .addr = 0x50, |
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42 | .flags = 0, |
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43 | .len = 1, |
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44 | .buf = out_buf, |
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45 | }, |
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46 | { |
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47 | .addr = 0x50, |
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48 | .flags = I2C_M_RD, |
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49 | .len = 1, |
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50 | .buf = buf, |
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51 | } |
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52 | }; |
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53 | |||
54 | ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2); |
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55 | if (ret == 2) |
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56 | return true; |
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57 | |||
58 | return false; |
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59 | } |
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60 | |||
61 | |||
62 | void radeon_i2c_do_lock(struct radeon_connector *radeon_connector, int lock_state) |
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63 | { |
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64 | struct radeon_device *rdev = radeon_connector->base.dev->dev_private; |
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65 | uint32_t temp; |
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66 | struct radeon_i2c_bus_rec *rec = &radeon_connector->ddc_bus->rec; |
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67 | |||
68 | /* RV410 appears to have a bug where the hw i2c in reset |
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69 | * holds the i2c port in a bad state - switch hw i2c away before |
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70 | * doing DDC - do this for all r200s/r300s/r400s for safety sake |
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71 | */ |
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72 | if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) { |
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73 | if (rec->a_clk_reg == RADEON_GPIO_MONID) { |
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74 | WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST | |
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75 | R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1))); |
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76 | } else { |
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77 | WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST | |
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78 | R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3))); |
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79 | } |
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80 | } |
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81 | if (lock_state) { |
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82 | temp = RREG32(rec->a_clk_reg); |
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83 | temp &= ~(rec->a_clk_mask); |
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84 | WREG32(rec->a_clk_reg, temp); |
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85 | |||
86 | temp = RREG32(rec->a_data_reg); |
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87 | temp &= ~(rec->a_data_mask); |
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88 | WREG32(rec->a_data_reg, temp); |
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89 | } |
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90 | |||
91 | temp = RREG32(rec->mask_clk_reg); |
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92 | if (lock_state) |
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93 | temp |= rec->mask_clk_mask; |
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94 | else |
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95 | temp &= ~rec->mask_clk_mask; |
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96 | WREG32(rec->mask_clk_reg, temp); |
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97 | temp = RREG32(rec->mask_clk_reg); |
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98 | |||
99 | temp = RREG32(rec->mask_data_reg); |
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100 | if (lock_state) |
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101 | temp |= rec->mask_data_mask; |
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102 | else |
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103 | temp &= ~rec->mask_data_mask; |
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104 | WREG32(rec->mask_data_reg, temp); |
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105 | temp = RREG32(rec->mask_data_reg); |
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106 | } |
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107 | |||
108 | static int get_clock(void *i2c_priv) |
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109 | { |
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110 | struct radeon_i2c_chan *i2c = i2c_priv; |
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111 | struct radeon_device *rdev = i2c->dev->dev_private; |
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112 | struct radeon_i2c_bus_rec *rec = &i2c->rec; |
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113 | uint32_t val; |
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114 | |||
115 | val = RREG32(rec->get_clk_reg); |
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116 | val &= rec->get_clk_mask; |
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117 | |||
118 | return (val != 0); |
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119 | } |
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120 | |||
121 | |||
122 | static int get_data(void *i2c_priv) |
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123 | { |
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124 | struct radeon_i2c_chan *i2c = i2c_priv; |
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125 | struct radeon_device *rdev = i2c->dev->dev_private; |
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126 | struct radeon_i2c_bus_rec *rec = &i2c->rec; |
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127 | uint32_t val; |
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128 | |||
129 | val = RREG32(rec->get_data_reg); |
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130 | val &= rec->get_data_mask; |
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131 | return (val != 0); |
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132 | } |
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133 | |||
134 | static void set_clock(void *i2c_priv, int clock) |
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135 | { |
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136 | struct radeon_i2c_chan *i2c = i2c_priv; |
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137 | struct radeon_device *rdev = i2c->dev->dev_private; |
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138 | struct radeon_i2c_bus_rec *rec = &i2c->rec; |
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139 | uint32_t val; |
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140 | |||
141 | val = RREG32(rec->put_clk_reg) & (uint32_t)~(rec->put_clk_mask); |
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142 | val |= clock ? 0 : rec->put_clk_mask; |
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143 | WREG32(rec->put_clk_reg, val); |
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144 | } |
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145 | |||
146 | static void set_data(void *i2c_priv, int data) |
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147 | { |
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148 | struct radeon_i2c_chan *i2c = i2c_priv; |
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149 | struct radeon_device *rdev = i2c->dev->dev_private; |
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150 | struct radeon_i2c_bus_rec *rec = &i2c->rec; |
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151 | uint32_t val; |
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152 | |||
153 | val = RREG32(rec->put_data_reg) & (uint32_t)~(rec->put_data_mask); |
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154 | val |= data ? 0 : rec->put_data_mask; |
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155 | WREG32(rec->put_data_reg, val); |
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156 | } |
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157 | |||
158 | struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, |
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159 | struct radeon_i2c_bus_rec *rec, |
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160 | const char *name) |
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161 | { |
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162 | struct radeon_i2c_chan *i2c; |
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163 | int ret; |
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164 | |||
165 | i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL); |
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166 | if (i2c == NULL) |
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167 | return NULL; |
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168 | |||
169 | // i2c->adapter.owner = THIS_MODULE; |
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170 | i2c->adapter.algo_data = &i2c->algo; |
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171 | i2c->dev = dev; |
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172 | i2c->algo.setsda = set_data; |
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173 | i2c->algo.setscl = set_clock; |
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174 | i2c->algo.getsda = get_data; |
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175 | i2c->algo.getscl = get_clock; |
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176 | i2c->algo.udelay = 20; |
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177 | /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always |
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178 | * make this, 2 jiffies is a lot more reliable */ |
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179 | i2c->algo.timeout = 2; |
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180 | i2c->algo.data = i2c; |
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181 | i2c->rec = *rec; |
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1125 | serge | 182 | // i2c_set_adapdata(&i2c->adapter, i2c); |
1123 | serge | 183 | |
184 | ret = i2c_bit_add_bus(&i2c->adapter); |
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185 | if (ret) { |
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186 | DRM_INFO("Failed to register i2c %s\n", name); |
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187 | goto out_free; |
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188 | } |
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189 | |||
190 | return i2c; |
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191 | out_free: |
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192 | kfree(i2c); |
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193 | return NULL; |
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194 | |||
195 | } |
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196 | |||
197 | void radeon_i2c_destroy(struct radeon_i2c_chan *i2c) |
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198 | { |
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199 | if (!i2c) |
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200 | return; |
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201 | |||
1125 | serge | 202 | // i2c_del_adapter(&i2c->adapter); |
1123 | serge | 203 | kfree(i2c); |
204 | } |
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205 | |||
206 | struct drm_encoder *radeon_best_encoder(struct drm_connector *connector) |
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207 | { |
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208 | return NULL; |
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209 | } |