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 CH7xxx_REG_VID 0x4a 32 #define CH7xxx_REG_DID 0x4b 33 34 #define CH7011_VID 0x83 /* 7010 as well */ 35 #define CH7010B_VID 0x05 36 #define CH7009A_VID 0x84 37 #define CH7009B_VID 0x85 38 #define CH7301_VID 0x95 39 40 #define CH7xxx_VID 0x84 41 #define CH7xxx_DID 0x17 42 #define CH7010_DID 0x16 43 44 #define CH7xxx_NUM_REGS 0x4c 45 46 #define CH7xxx_CM 0x1c 47 #define CH7xxx_CM_XCM (1<<0) 48 #define CH7xxx_CM_MCP (1<<2) 49 #define CH7xxx_INPUT_CLOCK 0x1d 50 #define CH7xxx_GPIO 0x1e 51 #define CH7xxx_GPIO_HPIR (1<<3) 52 #define CH7xxx_IDF 0x1f 53 54 #define CH7xxx_IDF_HSP (1<<3) 55 #define CH7xxx_IDF_VSP (1<<4) 56 57 #define CH7xxx_CONNECTION_DETECT 0x20 58 #define CH7xxx_CDET_DVI (1<<5) 59 60 #define CH7301_DAC_CNTL 0x21 61 #define CH7301_HOTPLUG 0x23 62 #define CH7xxx_TCTL 0x31 63 #define CH7xxx_TVCO 0x32 64 #define CH7xxx_TPCP 0x33 65 #define CH7xxx_TPD 0x34 66 #define CH7xxx_TPVT 0x35 67 #define CH7xxx_TLPF 0x36 68 #define CH7xxx_TCT 0x37 69 #define CH7301_TEST_PATTERN 0x48 70 71 #define CH7xxx_PM 0x49 72 #define CH7xxx_PM_FPD (1<<0) 73 #define CH7301_PM_DACPD0 (1<<1) 74 #define CH7301_PM_DACPD1 (1<<2) 75 #define CH7301_PM_DACPD2 (1<<3) 76 #define CH7xxx_PM_DVIL (1<<6) 77 #define CH7xxx_PM_DVIP (1<<7) 78 79 #define CH7301_SYNC_POLARITY 0x56 80 #define CH7301_SYNC_RGB_YUV (1<<0) 81 #define CH7301_SYNC_POL_DVI (1<<5) 82 83 /** @file 84 * driver for the Chrontel 7xxx DVI chip over DVO. 85 */ 86 87 static struct ch7xxx_id_struct { 88 uint8_t vid; 89 char *name; 90 } ch7xxx_ids[] = { 91 { CH7011_VID, "CH7011" }, 92 { CH7010B_VID, "CH7010B" }, 93 { CH7009A_VID, "CH7009A" }, 94 { CH7009B_VID, "CH7009B" }, 95 { CH7301_VID, "CH7301" }, 96 }; 97 98 static struct ch7xxx_did_struct { 99 uint8_t did; 100 char *name; 101 } ch7xxx_dids[] = { 102 { CH7xxx_DID, "CH7XXX" }, 103 { CH7010_DID, "CH7010B" }, 104 }; 105 106 struct ch7xxx_priv { 107 bool quiet; 108 }; 109 110 static char *ch7xxx_get_id(uint8_t vid) 111 { 112 int i; 113 114 for (i = 0; i < ARRAY_SIZE(ch7xxx_ids); i++) { 115 if (ch7xxx_ids[i].vid == vid) 116 return ch7xxx_ids[i].name; 117 } 118 119 return NULL; 120 } 121 122 static char *ch7xxx_get_did(uint8_t did) 123 { 124 int i; 125 126 for (i = 0; i < ARRAY_SIZE(ch7xxx_dids); i++) { 127 if (ch7xxx_dids[i].did == did) 128 return ch7xxx_dids[i].name; 129 } 130 131 return NULL; 132 } 133 134 /** Reads an 8 bit register */ 135 static bool ch7xxx_readb(struct intel_dvo_device *dvo, int addr, uint8_t *ch) 136 { 137 struct ch7xxx_priv *ch7xxx = dvo->dev_priv; 138 struct i2c_adapter *adapter = dvo->i2c_bus; 139 u8 out_buf[2]; 140 u8 in_buf[2]; 141 142 struct i2c_msg msgs[] = { 143 { 144 .addr = dvo->slave_addr, 145 .flags = 0, 146 .len = 1, 147 .buf = out_buf, 148 }, 149 { 150 .addr = dvo->slave_addr, 151 .flags = I2C_M_RD, 152 .len = 1, 153 .buf = in_buf, 154 } 155 }; 156 157 out_buf[0] = addr; 158 out_buf[1] = 0; 159 160 if (i2c_transfer(adapter, msgs, 2) == 2) { 161 *ch = in_buf[0]; 162 return true; 163 } 164 165 if (!ch7xxx->quiet) { 166 DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n", 167 addr, adapter->name, dvo->slave_addr); 168 } 169 return false; 170 } 171 172 /** Writes an 8 bit register */ 173 static bool ch7xxx_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch) 174 { 175 struct ch7xxx_priv *ch7xxx = dvo->dev_priv; 176 struct i2c_adapter *adapter = dvo->i2c_bus; 177 uint8_t out_buf[2]; 178 struct i2c_msg msg = { 179 .addr = dvo->slave_addr, 180 .flags = 0, 181 .len = 2, 182 .buf = out_buf, 183 }; 184 185 out_buf[0] = addr; 186 out_buf[1] = ch; 187 188 if (i2c_transfer(adapter, &msg, 1) == 1) 189 return true; 190 191 if (!ch7xxx->quiet) { 192 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n", 193 addr, adapter->name, dvo->slave_addr); 194 } 195 196 return false; 197 } 198 199 static bool ch7xxx_init(struct intel_dvo_device *dvo, 200 struct i2c_adapter *adapter) 201 { 202 /* this will detect the CH7xxx chip on the specified i2c bus */ 203 struct ch7xxx_priv *ch7xxx; 204 uint8_t vendor, device; 205 char *name, *devid; 206 207 ch7xxx = kzalloc(sizeof(struct ch7xxx_priv), GFP_KERNEL); 208 if (ch7xxx == NULL) 209 return false; 210 211 dvo->i2c_bus = adapter; 212 dvo->dev_priv = ch7xxx; 213 ch7xxx->quiet = true; 214 215 if (!ch7xxx_readb(dvo, CH7xxx_REG_VID, &vendor)) 216 goto out; 217 218 name = ch7xxx_get_id(vendor); 219 if (!name) { 220 DRM_DEBUG_KMS("ch7xxx not detected; got 0x%02x from %s " 221 "slave %d.\n", 222 vendor, adapter->name, dvo->slave_addr); 223 goto out; 224 } 225 226 227 if (!ch7xxx_readb(dvo, CH7xxx_REG_DID, &device)) 228 goto out; 229 230 devid = ch7xxx_get_did(device); 231 if (!devid) { 232 DRM_DEBUG_KMS("ch7xxx not detected; got 0x%02x from %s " 233 "slave %d.\n", 234 vendor, adapter->name, dvo->slave_addr); 235 goto out; 236 } 237 238 ch7xxx->quiet = false; 239 DRM_DEBUG_KMS("Detected %s chipset, vendor/device ID 0x%02x/0x%02x\n", 240 name, vendor, device); 241 return true; 242 out: 243 kfree(ch7xxx); 244 return false; 245 } 246 247 static enum drm_connector_status ch7xxx_detect(struct intel_dvo_device *dvo) 248 { 249 uint8_t cdet, orig_pm, pm; 250 251 ch7xxx_readb(dvo, CH7xxx_PM, &orig_pm); 252 253 pm = orig_pm; 254 pm &= ~CH7xxx_PM_FPD; 255 pm |= CH7xxx_PM_DVIL | CH7xxx_PM_DVIP; 256 257 ch7xxx_writeb(dvo, CH7xxx_PM, pm); 258 259 ch7xxx_readb(dvo, CH7xxx_CONNECTION_DETECT, &cdet); 260 261 ch7xxx_writeb(dvo, CH7xxx_PM, orig_pm); 262 263 if (cdet & CH7xxx_CDET_DVI) 264 return connector_status_connected; 265 return connector_status_disconnected; 266 } 267 268 static enum drm_mode_status ch7xxx_mode_valid(struct intel_dvo_device *dvo, 269 struct drm_display_mode *mode) 270 { 271 if (mode->clock > 165000) 272 return MODE_CLOCK_HIGH; 273 274 return MODE_OK; 275 } 276 277 static void ch7xxx_mode_set(struct intel_dvo_device *dvo, 278 const struct drm_display_mode *mode, 279 const struct drm_display_mode *adjusted_mode) 280 { 281 uint8_t tvco, tpcp, tpd, tlpf, idf; 282 283 if (mode->clock <= 65000) { 284 tvco = 0x23; 285 tpcp = 0x08; 286 tpd = 0x16; 287 tlpf = 0x60; 288 } else { 289 tvco = 0x2d; 290 tpcp = 0x06; 291 tpd = 0x26; 292 tlpf = 0xa0; 293 } 294 295 ch7xxx_writeb(dvo, CH7xxx_TCTL, 0x00); 296 ch7xxx_writeb(dvo, CH7xxx_TVCO, tvco); 297 ch7xxx_writeb(dvo, CH7xxx_TPCP, tpcp); 298 ch7xxx_writeb(dvo, CH7xxx_TPD, tpd); 299 ch7xxx_writeb(dvo, CH7xxx_TPVT, 0x30); 300 ch7xxx_writeb(dvo, CH7xxx_TLPF, tlpf); 301 ch7xxx_writeb(dvo, CH7xxx_TCT, 0x00); 302 303 ch7xxx_readb(dvo, CH7xxx_IDF, &idf); 304 305 idf &= ~(CH7xxx_IDF_HSP | CH7xxx_IDF_VSP); 306 if (mode->flags & DRM_MODE_FLAG_PHSYNC) 307 idf |= CH7xxx_IDF_HSP; 308 309 if (mode->flags & DRM_MODE_FLAG_PVSYNC) 310 idf |= CH7xxx_IDF_VSP; 311 312 ch7xxx_writeb(dvo, CH7xxx_IDF, idf); 313 } 314 315 /* set the CH7xxx power state */ 316 static void ch7xxx_dpms(struct intel_dvo_device *dvo, bool enable) 317 { 318 if (enable) 319 ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_DVIL | CH7xxx_PM_DVIP); 320 else 321 ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_FPD); 322 } 323 324 static bool ch7xxx_get_hw_state(struct intel_dvo_device *dvo) 325 { 326 u8 val; 327 328 ch7xxx_readb(dvo, CH7xxx_PM, &val); 329 330 if (val & (CH7xxx_PM_DVIL | CH7xxx_PM_DVIP)) 331 return true; 332 else 333 return false; 334 } 335 336 static void ch7xxx_dump_regs(struct intel_dvo_device *dvo) 337 { 338 int i; 339 340 for (i = 0; i < CH7xxx_NUM_REGS; i++) { 341 uint8_t val; 342 if ((i % 8) == 0) 343 DRM_DEBUG_KMS("\n %02X: ", i); 344 ch7xxx_readb(dvo, i, &val); 345 DRM_DEBUG_KMS("%02X ", val); 346 } 347 } 348 349 static void ch7xxx_destroy(struct intel_dvo_device *dvo) 350 { 351 struct ch7xxx_priv *ch7xxx = dvo->dev_priv; 352 353 if (ch7xxx) { 354 kfree(ch7xxx); 355 dvo->dev_priv = NULL; 356 } 357 } 358 359 const struct intel_dvo_dev_ops ch7xxx_ops = { 360 .init = ch7xxx_init, 361 .detect = ch7xxx_detect, 362 .mode_valid = ch7xxx_mode_valid, 363 .mode_set = ch7xxx_mode_set, 364 .dpms = ch7xxx_dpms, 365 .get_hw_state = ch7xxx_get_hw_state, 366 .dump_regs = ch7xxx_dump_regs, 367 .destroy = ch7xxx_destroy, 368 }; 369