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1/*2 * Copyright © 2007 Dave Mueller3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice (including the next12 * paragraph) shall be included in all copies or substantial portions of the13 * Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS21 * IN THE SOFTWARE.22 *23 * Authors:24 * Dave Mueller <dave.mueller@gmx.ch>25 *26 */27 28#include "intel_display_types.h"29#include "intel_dvo_dev.h"30 31/* register definitions according to the TFP410 data sheet */32#define TFP410_VID 0x014C33#define TFP410_DID 0x041034 35#define TFP410_VID_LO 0x0036#define TFP410_VID_HI 0x0137#define TFP410_DID_LO 0x0238#define TFP410_DID_HI 0x0339#define TFP410_REV 0x0440 41#define TFP410_CTL_1 0x0842#define TFP410_CTL_1_TDIS (1<<6)43#define TFP410_CTL_1_VEN (1<<5)44#define TFP410_CTL_1_HEN (1<<4)45#define TFP410_CTL_1_DSEL (1<<3)46#define TFP410_CTL_1_BSEL (1<<2)47#define TFP410_CTL_1_EDGE (1<<1)48#define TFP410_CTL_1_PD (1<<0)49 50#define TFP410_CTL_2 0x0951#define TFP410_CTL_2_VLOW (1<<7)52#define TFP410_CTL_2_MSEL_MASK (0x7<<4)53#define TFP410_CTL_2_MSEL (1<<4)54#define TFP410_CTL_2_TSEL (1<<3)55#define TFP410_CTL_2_RSEN (1<<2)56#define TFP410_CTL_2_HTPLG (1<<1)57#define TFP410_CTL_2_MDI (1<<0)58 59#define TFP410_CTL_3 0x0A60#define TFP410_CTL_3_DK_MASK (0x7<<5)61#define TFP410_CTL_3_DK (1<<5)62#define TFP410_CTL_3_DKEN (1<<4)63#define TFP410_CTL_3_CTL_MASK (0x7<<1)64#define TFP410_CTL_3_CTL (1<<1)65 66#define TFP410_USERCFG 0x0B67 68#define TFP410_DE_DLY 0x3269 70#define TFP410_DE_CTL 0x3371#define TFP410_DE_CTL_DEGEN (1<<6)72#define TFP410_DE_CTL_VSPOL (1<<5)73#define TFP410_DE_CTL_HSPOL (1<<4)74#define TFP410_DE_CTL_DEDLY8 (1<<0)75 76#define TFP410_DE_TOP 0x3477 78#define TFP410_DE_CNT_LO 0x3679#define TFP410_DE_CNT_HI 0x3780 81#define TFP410_DE_LIN_LO 0x3882#define TFP410_DE_LIN_HI 0x3983 84#define TFP410_H_RES_LO 0x3A85#define TFP410_H_RES_HI 0x3B86 87#define TFP410_V_RES_LO 0x3C88#define TFP410_V_RES_HI 0x3D89 90struct tfp410_priv {91 bool quiet;92};93 94static bool tfp410_readb(struct intel_dvo_device *dvo, int addr, u8 *ch)95{96 struct tfp410_priv *tfp = dvo->dev_priv;97 struct i2c_adapter *adapter = dvo->i2c_bus;98 u8 out_buf[2];99 u8 in_buf[2];100 101 struct i2c_msg msgs[] = {102 {103 .addr = dvo->target_addr,104 .flags = 0,105 .len = 1,106 .buf = out_buf,107 },108 {109 .addr = dvo->target_addr,110 .flags = I2C_M_RD,111 .len = 1,112 .buf = in_buf,113 }114 };115 116 out_buf[0] = addr;117 out_buf[1] = 0;118 119 if (i2c_transfer(adapter, msgs, 2) == 2) {120 *ch = in_buf[0];121 return true;122 }123 124 if (!tfp->quiet) {125 DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",126 addr, adapter->name, dvo->target_addr);127 }128 return false;129}130 131static bool tfp410_writeb(struct intel_dvo_device *dvo, int addr, u8 ch)132{133 struct tfp410_priv *tfp = dvo->dev_priv;134 struct i2c_adapter *adapter = dvo->i2c_bus;135 u8 out_buf[2];136 struct i2c_msg msg = {137 .addr = dvo->target_addr,138 .flags = 0,139 .len = 2,140 .buf = out_buf,141 };142 143 out_buf[0] = addr;144 out_buf[1] = ch;145 146 if (i2c_transfer(adapter, &msg, 1) == 1)147 return true;148 149 if (!tfp->quiet) {150 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",151 addr, adapter->name, dvo->target_addr);152 }153 154 return false;155}156 157static int tfp410_getid(struct intel_dvo_device *dvo, int addr)158{159 u8 ch1, ch2;160 161 if (tfp410_readb(dvo, addr+0, &ch1) &&162 tfp410_readb(dvo, addr+1, &ch2))163 return ((ch2 << 8) & 0xFF00) | (ch1 & 0x00FF);164 165 return -1;166}167 168/* Ti TFP410 driver for chip on i2c bus */169static bool tfp410_init(struct intel_dvo_device *dvo,170 struct i2c_adapter *adapter)171{172 /* this will detect the tfp410 chip on the specified i2c bus */173 struct tfp410_priv *tfp;174 int id;175 176 tfp = kzalloc(sizeof(*tfp), GFP_KERNEL);177 if (tfp == NULL)178 return false;179 180 dvo->i2c_bus = adapter;181 dvo->dev_priv = tfp;182 tfp->quiet = true;183 184 if ((id = tfp410_getid(dvo, TFP410_VID_LO)) != TFP410_VID) {185 DRM_DEBUG_KMS("tfp410 not detected got VID %X: from %s "186 "Target %d.\n",187 id, adapter->name, dvo->target_addr);188 goto out;189 }190 191 if ((id = tfp410_getid(dvo, TFP410_DID_LO)) != TFP410_DID) {192 DRM_DEBUG_KMS("tfp410 not detected got DID %X: from %s "193 "Target %d.\n",194 id, adapter->name, dvo->target_addr);195 goto out;196 }197 tfp->quiet = false;198 return true;199out:200 kfree(tfp);201 return false;202}203 204static enum drm_connector_status tfp410_detect(struct intel_dvo_device *dvo)205{206 enum drm_connector_status ret = connector_status_disconnected;207 u8 ctl2;208 209 if (tfp410_readb(dvo, TFP410_CTL_2, &ctl2)) {210 if (ctl2 & TFP410_CTL_2_RSEN)211 ret = connector_status_connected;212 else213 ret = connector_status_disconnected;214 }215 216 return ret;217}218 219static enum drm_mode_status tfp410_mode_valid(struct intel_dvo_device *dvo,220 struct drm_display_mode *mode)221{222 return MODE_OK;223}224 225static void tfp410_mode_set(struct intel_dvo_device *dvo,226 const struct drm_display_mode *mode,227 const struct drm_display_mode *adjusted_mode)228{229 /* As long as the basics are set up, since we don't have clock dependencies230 * in the mode setup, we can just leave the registers alone and everything231 * will work fine.232 */233 /* don't do much */234 return;235}236 237/* set the tfp410 power state */238static void tfp410_dpms(struct intel_dvo_device *dvo, bool enable)239{240 u8 ctl1;241 242 if (!tfp410_readb(dvo, TFP410_CTL_1, &ctl1))243 return;244 245 if (enable)246 ctl1 |= TFP410_CTL_1_PD;247 else248 ctl1 &= ~TFP410_CTL_1_PD;249 250 tfp410_writeb(dvo, TFP410_CTL_1, ctl1);251}252 253static bool tfp410_get_hw_state(struct intel_dvo_device *dvo)254{255 u8 ctl1;256 257 if (!tfp410_readb(dvo, TFP410_CTL_1, &ctl1))258 return false;259 260 if (ctl1 & TFP410_CTL_1_PD)261 return true;262 else263 return false;264}265 266static void tfp410_dump_regs(struct intel_dvo_device *dvo)267{268 u8 val, val2;269 270 tfp410_readb(dvo, TFP410_REV, &val);271 DRM_DEBUG_KMS("TFP410_REV: 0x%02X\n", val);272 tfp410_readb(dvo, TFP410_CTL_1, &val);273 DRM_DEBUG_KMS("TFP410_CTL1: 0x%02X\n", val);274 tfp410_readb(dvo, TFP410_CTL_2, &val);275 DRM_DEBUG_KMS("TFP410_CTL2: 0x%02X\n", val);276 tfp410_readb(dvo, TFP410_CTL_3, &val);277 DRM_DEBUG_KMS("TFP410_CTL3: 0x%02X\n", val);278 tfp410_readb(dvo, TFP410_USERCFG, &val);279 DRM_DEBUG_KMS("TFP410_USERCFG: 0x%02X\n", val);280 tfp410_readb(dvo, TFP410_DE_DLY, &val);281 DRM_DEBUG_KMS("TFP410_DE_DLY: 0x%02X\n", val);282 tfp410_readb(dvo, TFP410_DE_CTL, &val);283 DRM_DEBUG_KMS("TFP410_DE_CTL: 0x%02X\n", val);284 tfp410_readb(dvo, TFP410_DE_TOP, &val);285 DRM_DEBUG_KMS("TFP410_DE_TOP: 0x%02X\n", val);286 tfp410_readb(dvo, TFP410_DE_CNT_LO, &val);287 tfp410_readb(dvo, TFP410_DE_CNT_HI, &val2);288 DRM_DEBUG_KMS("TFP410_DE_CNT: 0x%02X%02X\n", val2, val);289 tfp410_readb(dvo, TFP410_DE_LIN_LO, &val);290 tfp410_readb(dvo, TFP410_DE_LIN_HI, &val2);291 DRM_DEBUG_KMS("TFP410_DE_LIN: 0x%02X%02X\n", val2, val);292 tfp410_readb(dvo, TFP410_H_RES_LO, &val);293 tfp410_readb(dvo, TFP410_H_RES_HI, &val2);294 DRM_DEBUG_KMS("TFP410_H_RES: 0x%02X%02X\n", val2, val);295 tfp410_readb(dvo, TFP410_V_RES_LO, &val);296 tfp410_readb(dvo, TFP410_V_RES_HI, &val2);297 DRM_DEBUG_KMS("TFP410_V_RES: 0x%02X%02X\n", val2, val);298}299 300static void tfp410_destroy(struct intel_dvo_device *dvo)301{302 struct tfp410_priv *tfp = dvo->dev_priv;303 304 if (tfp) {305 kfree(tfp);306 dvo->dev_priv = NULL;307 }308}309 310const struct intel_dvo_dev_ops tfp410_ops = {311 .init = tfp410_init,312 .detect = tfp410_detect,313 .mode_valid = tfp410_mode_valid,314 .mode_set = tfp410_mode_set,315 .dpms = tfp410_dpms,316 .get_hw_state = tfp410_get_hw_state,317 .dump_regs = tfp410_dump_regs,318 .destroy = tfp410_destroy,319};320