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 intel_iic_softc *sc; 71 struct sil164_priv *sil = dvo->dev_priv; 72 struct i2c_adapter *adapter = dvo->i2c_bus; 73 u8 out_buf[2]; 74 u8 in_buf[2]; 75 76 struct i2c_msg msgs[] = { 77 { 78 .slave = dvo->slave_addr << 1, 79 .flags = 0, 80 .len = 1, 81 .buf = out_buf, 82 }, 83 { 84 .slave = dvo->slave_addr << 1, 85 .flags = I2C_M_RD, 86 .len = 1, 87 .buf = in_buf, 88 } 89 }; 90 91 out_buf[0] = addr; 92 out_buf[1] = 0; 93 94 sc = device_get_softc(adapter); 95 96 if (iicbus_transfer(adapter, msgs, 2) == 0) { 97 *ch = in_buf[0]; 98 return true; 99 } 100 101 if (!sil->quiet) { 102 DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n", 103 addr, sc->name, dvo->slave_addr); 104 } 105 return false; 106 } 107 108 static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch) 109 { 110 struct intel_iic_softc *sc; 111 struct sil164_priv *sil = dvo->dev_priv; 112 struct i2c_adapter *adapter = dvo->i2c_bus; 113 uint8_t out_buf[2]; 114 struct i2c_msg msg = { 115 .slave = dvo->slave_addr << 1, 116 .flags = 0, 117 .len = 2, 118 .buf = out_buf, 119 }; 120 121 out_buf[0] = addr; 122 out_buf[1] = ch; 123 124 sc = device_get_softc(adapter); 125 126 if (iicbus_transfer(adapter, &msg, 1) == 0) 127 return true; 128 129 if (!sil->quiet) { 130 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n", 131 addr, sc->name, dvo->slave_addr); 132 } 133 134 return false; 135 } 136 137 /* Silicon Image 164 driver for chip on i2c bus */ 138 static bool sil164_init(struct intel_dvo_device *dvo, 139 struct i2c_adapter *adapter) 140 { 141 struct intel_iic_softc *sc; 142 /* this will detect the SIL164 chip on the specified i2c bus */ 143 struct sil164_priv *sil; 144 unsigned char ch; 145 146 sc = device_get_softc(adapter); 147 148 sil = kzalloc(sizeof(struct sil164_priv), GFP_KERNEL); 149 if (sil == NULL) 150 return false; 151 152 dvo->i2c_bus = adapter; 153 dvo->dev_priv = sil; 154 sil->quiet = true; 155 156 if (!sil164_readb(dvo, SIL164_VID_LO, &ch)) 157 goto out; 158 159 if (ch != (SIL164_VID & 0xff)) { 160 DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n", 161 ch, sc->name, dvo->slave_addr); 162 goto out; 163 } 164 165 if (!sil164_readb(dvo, SIL164_DID_LO, &ch)) 166 goto out; 167 168 if (ch != (SIL164_DID & 0xff)) { 169 DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n", 170 ch, sc->name, dvo->slave_addr); 171 goto out; 172 } 173 sil->quiet = false; 174 175 DRM_DEBUG_KMS("init sil164 dvo controller successfully!\n"); 176 return true; 177 178 out: 179 kfree(sil); 180 return false; 181 } 182 183 static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo) 184 { 185 uint8_t reg9; 186 187 sil164_readb(dvo, SIL164_REG9, ®9); 188 189 if (reg9 & SIL164_9_HTPLG) 190 return connector_status_connected; 191 else 192 return connector_status_disconnected; 193 } 194 195 static enum drm_mode_status sil164_mode_valid(struct intel_dvo_device *dvo, 196 struct drm_display_mode *mode) 197 { 198 return MODE_OK; 199 } 200 201 static void sil164_mode_set(struct intel_dvo_device *dvo, 202 struct drm_display_mode *mode, 203 struct drm_display_mode *adjusted_mode) 204 { 205 /* As long as the basics are set up, since we don't have clock 206 * dependencies in the mode setup, we can just leave the 207 * registers alone and everything will work fine. 208 */ 209 /* recommended programming sequence from doc */ 210 /*sil164_writeb(sil, 0x08, 0x30); 211 sil164_writeb(sil, 0x09, 0x00); 212 sil164_writeb(sil, 0x0a, 0x90); 213 sil164_writeb(sil, 0x0c, 0x89); 214 sil164_writeb(sil, 0x08, 0x31);*/ 215 /* don't do much */ 216 return; 217 } 218 219 /* set the SIL164 power state */ 220 static void sil164_dpms(struct intel_dvo_device *dvo, bool enable) 221 { 222 int ret; 223 unsigned char ch; 224 225 ret = sil164_readb(dvo, SIL164_REG8, &ch); 226 if (ret == false) 227 return; 228 229 if (enable) 230 ch |= SIL164_8_PD; 231 else 232 ch &= ~SIL164_8_PD; 233 234 sil164_writeb(dvo, SIL164_REG8, ch); 235 return; 236 } 237 238 static bool sil164_get_hw_state(struct intel_dvo_device *dvo) 239 { 240 int ret; 241 unsigned char ch; 242 243 ret = sil164_readb(dvo, SIL164_REG8, &ch); 244 if (ret == false) 245 return false; 246 247 if (ch & SIL164_8_PD) 248 return true; 249 else 250 return false; 251 } 252 253 static void sil164_dump_regs(struct intel_dvo_device *dvo) 254 { 255 uint8_t val; 256 257 sil164_readb(dvo, SIL164_FREQ_LO, &val); 258 DRM_DEBUG_KMS("SIL164_FREQ_LO: 0x%02x\n", val); 259 sil164_readb(dvo, SIL164_FREQ_HI, &val); 260 DRM_DEBUG_KMS("SIL164_FREQ_HI: 0x%02x\n", val); 261 sil164_readb(dvo, SIL164_REG8, &val); 262 DRM_DEBUG_KMS("SIL164_REG8: 0x%02x\n", val); 263 sil164_readb(dvo, SIL164_REG9, &val); 264 DRM_DEBUG_KMS("SIL164_REG9: 0x%02x\n", val); 265 sil164_readb(dvo, SIL164_REGC, &val); 266 DRM_DEBUG_KMS("SIL164_REGC: 0x%02x\n", val); 267 } 268 269 static void sil164_destroy(struct intel_dvo_device *dvo) 270 { 271 struct sil164_priv *sil = dvo->dev_priv; 272 273 if (sil) { 274 kfree(sil); 275 dvo->dev_priv = NULL; 276 } 277 } 278 279 struct intel_dvo_dev_ops sil164_ops = { 280 .init = sil164_init, 281 .detect = sil164_detect, 282 .mode_valid = sil164_mode_valid, 283 .mode_set = sil164_mode_set, 284 .dpms = sil164_dpms, 285 .get_hw_state = sil164_get_hw_state, 286 .dump_regs = sil164_dump_regs, 287 .destroy = sil164_destroy, 288 }; 289