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 *ch = 0; /* silence gcc warnings */ 92 out_buf[0] = addr; 93 out_buf[1] = 0; 94 95 sc = device_get_softc(adapter); 96 97 if (iicbus_transfer(adapter, msgs, 2) == 0) { 98 *ch = in_buf[0]; 99 return true; 100 } 101 102 if (!sil->quiet) { 103 DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n", 104 addr, sc->name, dvo->slave_addr); 105 } 106 return false; 107 } 108 109 static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch) 110 { 111 struct intel_iic_softc *sc; 112 struct sil164_priv *sil = dvo->dev_priv; 113 struct i2c_adapter *adapter = dvo->i2c_bus; 114 uint8_t out_buf[2]; 115 struct i2c_msg msg = { 116 .slave = dvo->slave_addr << 1, 117 .flags = 0, 118 .len = 2, 119 .buf = out_buf, 120 }; 121 122 out_buf[0] = addr; 123 out_buf[1] = ch; 124 125 sc = device_get_softc(adapter); 126 127 if (iicbus_transfer(adapter, &msg, 1) == 0) 128 return true; 129 130 if (!sil->quiet) { 131 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n", 132 addr, sc->name, dvo->slave_addr); 133 } 134 135 return false; 136 } 137 138 /* Silicon Image 164 driver for chip on i2c bus */ 139 static bool sil164_init(struct intel_dvo_device *dvo, 140 struct i2c_adapter *adapter) 141 { 142 struct intel_iic_softc *sc; 143 /* this will detect the SIL164 chip on the specified i2c bus */ 144 struct sil164_priv *sil; 145 unsigned char ch; 146 147 sc = device_get_softc(adapter); 148 149 sil = kzalloc(sizeof(struct sil164_priv), GFP_KERNEL); 150 if (sil == NULL) 151 return false; 152 153 dvo->i2c_bus = adapter; 154 dvo->dev_priv = sil; 155 sil->quiet = true; 156 157 if (!sil164_readb(dvo, SIL164_VID_LO, &ch)) 158 goto out; 159 160 if (ch != (SIL164_VID & 0xff)) { 161 DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n", 162 ch, sc->name, dvo->slave_addr); 163 goto out; 164 } 165 166 if (!sil164_readb(dvo, SIL164_DID_LO, &ch)) 167 goto out; 168 169 if (ch != (SIL164_DID & 0xff)) { 170 DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n", 171 ch, sc->name, dvo->slave_addr); 172 goto out; 173 } 174 sil->quiet = false; 175 176 DRM_DEBUG_KMS("init sil164 dvo controller successfully!\n"); 177 return true; 178 179 out: 180 kfree(sil); 181 return false; 182 } 183 184 static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo) 185 { 186 uint8_t reg9; 187 188 sil164_readb(dvo, SIL164_REG9, ®9); 189 190 if (reg9 & SIL164_9_HTPLG) 191 return connector_status_connected; 192 else 193 return connector_status_disconnected; 194 } 195 196 static enum drm_mode_status sil164_mode_valid(struct intel_dvo_device *dvo, 197 struct drm_display_mode *mode) 198 { 199 return MODE_OK; 200 } 201 202 static void sil164_mode_set(struct intel_dvo_device *dvo, 203 const struct drm_display_mode *mode, 204 const struct drm_display_mode *adjusted_mode) 205 { 206 /* As long as the basics are set up, since we don't have clock 207 * dependencies in the mode setup, we can just leave the 208 * registers alone and everything will work fine. 209 */ 210 /* recommended programming sequence from doc */ 211 /*sil164_writeb(sil, 0x08, 0x30); 212 sil164_writeb(sil, 0x09, 0x00); 213 sil164_writeb(sil, 0x0a, 0x90); 214 sil164_writeb(sil, 0x0c, 0x89); 215 sil164_writeb(sil, 0x08, 0x31);*/ 216 /* don't do much */ 217 return; 218 } 219 220 /* set the SIL164 power state */ 221 static void sil164_dpms(struct intel_dvo_device *dvo, bool enable) 222 { 223 int ret; 224 unsigned char ch; 225 226 ret = sil164_readb(dvo, SIL164_REG8, &ch); 227 if (ret == false) 228 return; 229 230 if (enable) 231 ch |= SIL164_8_PD; 232 else 233 ch &= ~SIL164_8_PD; 234 235 sil164_writeb(dvo, SIL164_REG8, ch); 236 return; 237 } 238 239 static bool sil164_get_hw_state(struct intel_dvo_device *dvo) 240 { 241 int ret; 242 unsigned char ch; 243 244 ret = sil164_readb(dvo, SIL164_REG8, &ch); 245 if (ret == false) 246 return false; 247 248 if (ch & SIL164_8_PD) 249 return true; 250 else 251 return false; 252 } 253 254 static void sil164_dump_regs(struct intel_dvo_device *dvo) 255 { 256 uint8_t val; 257 258 sil164_readb(dvo, SIL164_FREQ_LO, &val); 259 DRM_DEBUG_KMS("SIL164_FREQ_LO: 0x%02x\n", val); 260 sil164_readb(dvo, SIL164_FREQ_HI, &val); 261 DRM_DEBUG_KMS("SIL164_FREQ_HI: 0x%02x\n", val); 262 sil164_readb(dvo, SIL164_REG8, &val); 263 DRM_DEBUG_KMS("SIL164_REG8: 0x%02x\n", val); 264 sil164_readb(dvo, SIL164_REG9, &val); 265 DRM_DEBUG_KMS("SIL164_REG9: 0x%02x\n", val); 266 sil164_readb(dvo, SIL164_REGC, &val); 267 DRM_DEBUG_KMS("SIL164_REGC: 0x%02x\n", val); 268 } 269 270 static void sil164_destroy(struct intel_dvo_device *dvo) 271 { 272 struct sil164_priv *sil = dvo->dev_priv; 273 274 if (sil) { 275 kfree(sil); 276 dvo->dev_priv = NULL; 277 } 278 } 279 280 struct intel_dvo_dev_ops sil164_ops = { 281 .init = sil164_init, 282 .detect = sil164_detect, 283 .mode_valid = sil164_mode_valid, 284 .mode_set = sil164_mode_set, 285 .dpms = sil164_dpms, 286 .get_hw_state = sil164_get_hw_state, 287 .dump_regs = sil164_dump_regs, 288 .destroy = sil164_destroy, 289 }; 290