drivers/gpu/drm/i915/dvo_ch7xxx.c

   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 };