sys/dev/drm/i915/dvo_sil164.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 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, &reg9);
 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 };