1 /************************************************************************** 2 3 Copyright © 2006 Dave Airlie 4 5 All Rights Reserved. 6 7 Permission is hereby granted, free of charge, to any person obtaining a 8 copy of this software and associated documentation files (the 9 "Software"), to deal in the Software without restriction, including 10 without limitation the rights to use, copy, modify, merge, publish, 11 distribute, sub license, and/or sell copies of the Software, and to 12 permit persons to whom the Software is furnished to do so, subject to 13 the following conditions: 14 15 The above copyright notice and this permission notice (including the 16 next paragraph) shall be included in all copies or substantial portions 17 of the Software. 18 19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 23 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 27 **************************************************************************/ 28 29 #include "dvo.h" 30 31 #define SIL164_VID 0x0001 32 #define SIL164_DID 0x0006 33 34 #define SIL164_VID_LO 0x00 35 #define SIL164_VID_HI 0x01 36 #define SIL164_DID_LO 0x02 37 #define SIL164_DID_HI 0x03 38 #define SIL164_REV 0x04 39 #define SIL164_RSVD 0x05 40 #define SIL164_FREQ_LO 0x06 41 #define SIL164_FREQ_HI 0x07 42 43 #define SIL164_REG8 0x08 44 #define SIL164_8_VEN (1<<5) 45 #define SIL164_8_HEN (1<<4) 46 #define SIL164_8_DSEL (1<<3) 47 #define SIL164_8_BSEL (1<<2) 48 #define SIL164_8_EDGE (1<<1) 49 #define SIL164_8_PD (1<<0) 50 51 #define SIL164_REG9 0x09 52 #define SIL164_9_VLOW (1<<7) 53 #define SIL164_9_MSEL_MASK (0x7<<4) 54 #define SIL164_9_TSEL (1<<3) 55 #define SIL164_9_RSEN (1<<2) 56 #define SIL164_9_HTPLG (1<<1) 57 #define SIL164_9_MDI (1<<0) 58 59 #define SIL164_REGC 0x0c 60 61 struct sil164_priv { 62 //I2CDevRec d; 63 bool quiet; 64 }; 65 66 #define SILPTR(d) ((SIL164Ptr)(d->DriverPrivate.ptr)) 67 68 static bool sil164_readb(struct intel_dvo_device *dvo, int addr, uint8_t *ch) 69 { 70 struct sil164_priv *sil = dvo->dev_priv; 71 struct i2c_adapter *adapter = dvo->i2c_bus; 72 u8 out_buf[2]; 73 u8 in_buf[2]; 74 75 struct i2c_msg msgs[] = { 76 { 77 .addr = dvo->slave_addr, 78 .flags = 0, 79 .len = 1, 80 .buf = out_buf, 81 }, 82 { 83 .addr = dvo->slave_addr, 84 .flags = I2C_M_RD, 85 .len = 1, 86 .buf = in_buf, 87 } 88 }; 89 90 *ch = 0; /* silence gcc warnings */ 91 out_buf[0] = addr; 92 out_buf[1] = 0; 93 94 if (i2c_transfer(adapter, msgs, 2) == 2) { 95 *ch = in_buf[0]; 96 return true; 97 } 98 99 if (!sil->quiet) { 100 DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n", 101 addr, adapter->name, dvo->slave_addr); 102 } 103 return false; 104 } 105 106 static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch) 107 { 108 struct sil164_priv *sil = dvo->dev_priv; 109 struct i2c_adapter *adapter = dvo->i2c_bus; 110 uint8_t out_buf[2]; 111 struct i2c_msg msg = { 112 .addr = dvo->slave_addr, 113 .flags = 0, 114 .len = 2, 115 .buf = out_buf, 116 }; 117 118 out_buf[0] = addr; 119 out_buf[1] = ch; 120 121 if (i2c_transfer(adapter, &msg, 1) == 1) 122 return true; 123 124 if (!sil->quiet) { 125 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n", 126 addr, adapter->name, dvo->slave_addr); 127 } 128 129 return false; 130 } 131 132 /* Silicon Image 164 driver for chip on i2c bus */ 133 static bool sil164_init(struct intel_dvo_device *dvo, 134 struct i2c_adapter *adapter) 135 { 136 /* this will detect the SIL164 chip on the specified i2c bus */ 137 struct sil164_priv *sil; 138 unsigned char ch; 139 140 sil = kzalloc(sizeof(struct sil164_priv), GFP_KERNEL); 141 if (sil == NULL) 142 return false; 143 144 dvo->i2c_bus = adapter; 145 dvo->dev_priv = sil; 146 sil->quiet = true; 147 148 if (!sil164_readb(dvo, SIL164_VID_LO, &ch)) 149 goto out; 150 151 if (ch != (SIL164_VID & 0xff)) { 152 DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n", 153 ch, adapter->name, dvo->slave_addr); 154 goto out; 155 } 156 157 if (!sil164_readb(dvo, SIL164_DID_LO, &ch)) 158 goto out; 159 160 if (ch != (SIL164_DID & 0xff)) { 161 DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n", 162 ch, adapter->name, dvo->slave_addr); 163 goto out; 164 } 165 sil->quiet = false; 166 167 DRM_DEBUG_KMS("init sil164 dvo controller successfully!\n"); 168 return true; 169 170 out: 171 kfree(sil); 172 return false; 173 } 174 175 static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo) 176 { 177 uint8_t reg9; 178 179 sil164_readb(dvo, SIL164_REG9, ®9); 180 181 if (reg9 & SIL164_9_HTPLG) 182 return connector_status_connected; 183 else 184 return connector_status_disconnected; 185 } 186 187 static enum drm_mode_status sil164_mode_valid(struct intel_dvo_device *dvo, 188 struct drm_display_mode *mode) 189 { 190 return MODE_OK; 191 } 192 193 static void sil164_mode_set(struct intel_dvo_device *dvo, 194 const struct drm_display_mode *mode, 195 const struct drm_display_mode *adjusted_mode) 196 { 197 /* As long as the basics are set up, since we don't have clock 198 * dependencies in the mode setup, we can just leave the 199 * registers alone and everything will work fine. 200 */ 201 /* recommended programming sequence from doc */ 202 /*sil164_writeb(sil, 0x08, 0x30); 203 sil164_writeb(sil, 0x09, 0x00); 204 sil164_writeb(sil, 0x0a, 0x90); 205 sil164_writeb(sil, 0x0c, 0x89); 206 sil164_writeb(sil, 0x08, 0x31);*/ 207 /* don't do much */ 208 return; 209 } 210 211 /* set the SIL164 power state */ 212 static void sil164_dpms(struct intel_dvo_device *dvo, bool enable) 213 { 214 int ret; 215 unsigned char ch; 216 217 ret = sil164_readb(dvo, SIL164_REG8, &ch); 218 if (ret == false) 219 return; 220 221 if (enable) 222 ch |= SIL164_8_PD; 223 else 224 ch &= ~SIL164_8_PD; 225 226 sil164_writeb(dvo, SIL164_REG8, ch); 227 return; 228 } 229 230 static bool sil164_get_hw_state(struct intel_dvo_device *dvo) 231 { 232 int ret; 233 unsigned char ch; 234 235 ret = sil164_readb(dvo, SIL164_REG8, &ch); 236 if (ret == false) 237 return false; 238 239 if (ch & SIL164_8_PD) 240 return true; 241 else 242 return false; 243 } 244 245 static void sil164_dump_regs(struct intel_dvo_device *dvo) 246 { 247 uint8_t val; 248 249 sil164_readb(dvo, SIL164_FREQ_LO, &val); 250 DRM_DEBUG_KMS("SIL164_FREQ_LO: 0x%02x\n", val); 251 sil164_readb(dvo, SIL164_FREQ_HI, &val); 252 DRM_DEBUG_KMS("SIL164_FREQ_HI: 0x%02x\n", val); 253 sil164_readb(dvo, SIL164_REG8, &val); 254 DRM_DEBUG_KMS("SIL164_REG8: 0x%02x\n", val); 255 sil164_readb(dvo, SIL164_REG9, &val); 256 DRM_DEBUG_KMS("SIL164_REG9: 0x%02x\n", val); 257 sil164_readb(dvo, SIL164_REGC, &val); 258 DRM_DEBUG_KMS("SIL164_REGC: 0x%02x\n", val); 259 } 260 261 static void sil164_destroy(struct intel_dvo_device *dvo) 262 { 263 struct sil164_priv *sil = dvo->dev_priv; 264 265 if (sil) { 266 kfree(sil); 267 dvo->dev_priv = NULL; 268 } 269 } 270 271 const struct intel_dvo_dev_ops sil164_ops = { 272 .init = sil164_init, 273 .detect = sil164_detect, 274 .mode_valid = sil164_mode_valid, 275 .mode_set = sil164_mode_set, 276 .dpms = sil164_dpms, 277 .get_hw_state = sil164_get_hw_state, 278 .dump_regs = sil164_dump_regs, 279 .destroy = sil164_destroy, 280 }; 281