1 /*
2 * Copyright © 2007 Dave Mueller
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Dave Mueller <dave.mueller@gmx.ch>
25 *
26 */
27
28 #include "dvo.h"
29
30 /* register definitions according to the TFP410 data sheet */
31 #define TFP410_VID 0x014C
32 #define TFP410_DID 0x0410
33
34 #define TFP410_VID_LO 0x00
35 #define TFP410_VID_HI 0x01
36 #define TFP410_DID_LO 0x02
37 #define TFP410_DID_HI 0x03
38 #define TFP410_REV 0x04
39
40 #define TFP410_CTL_1 0x08
41 #define TFP410_CTL_1_TDIS (1<<6)
42 #define TFP410_CTL_1_VEN (1<<5)
43 #define TFP410_CTL_1_HEN (1<<4)
44 #define TFP410_CTL_1_DSEL (1<<3)
45 #define TFP410_CTL_1_BSEL (1<<2)
46 #define TFP410_CTL_1_EDGE (1<<1)
47 #define TFP410_CTL_1_PD (1<<0)
48
49 #define TFP410_CTL_2 0x09
50 #define TFP410_CTL_2_VLOW (1<<7)
51 #define TFP410_CTL_2_MSEL_MASK (0x7<<4)
52 #define TFP410_CTL_2_MSEL (1<<4)
53 #define TFP410_CTL_2_TSEL (1<<3)
54 #define TFP410_CTL_2_RSEN (1<<2)
55 #define TFP410_CTL_2_HTPLG (1<<1)
56 #define TFP410_CTL_2_MDI (1<<0)
57
58 #define TFP410_CTL_3 0x0A
59 #define TFP410_CTL_3_DK_MASK (0x7<<5)
60 #define TFP410_CTL_3_DK (1<<5)
61 #define TFP410_CTL_3_DKEN (1<<4)
62 #define TFP410_CTL_3_CTL_MASK (0x7<<1)
63 #define TFP410_CTL_3_CTL (1<<1)
64
65 #define TFP410_USERCFG 0x0B
66
67 #define TFP410_DE_DLY 0x32
68
69 #define TFP410_DE_CTL 0x33
70 #define TFP410_DE_CTL_DEGEN (1<<6)
71 #define TFP410_DE_CTL_VSPOL (1<<5)
72 #define TFP410_DE_CTL_HSPOL (1<<4)
73 #define TFP410_DE_CTL_DEDLY8 (1<<0)
74
75 #define TFP410_DE_TOP 0x34
76
77 #define TFP410_DE_CNT_LO 0x36
78 #define TFP410_DE_CNT_HI 0x37
79
80 #define TFP410_DE_LIN_LO 0x38
81 #define TFP410_DE_LIN_HI 0x39
82
83 #define TFP410_H_RES_LO 0x3A
84 #define TFP410_H_RES_HI 0x3B
85
86 #define TFP410_V_RES_LO 0x3C
87 #define TFP410_V_RES_HI 0x3D
88
89 struct tfp410_save_rec {
90 uint8_t ctl1;
91 uint8_t ctl2;
92 };
93
94 struct tfp410_priv {
95 bool quiet;
96
97 struct tfp410_save_rec saved_reg;
98 struct tfp410_save_rec mode_reg;
99 };
100
tfp410_readb(struct intel_dvo_device * dvo,int addr,uint8_t * ch)101 static bool tfp410_readb(struct intel_dvo_device *dvo, int addr, uint8_t *ch)
102 {
103 struct tfp410_priv *tfp = dvo->dev_priv;
104 struct intel_i2c_chan *i2cbus = dvo->i2c_bus;
105 u8 out_buf[2];
106 u8 in_buf[2];
107
108 struct i2c_msg msgs[] = {
109 {
110 .addr = i2cbus->slave_addr,
111 .flags = 0,
112 .len = 1,
113 .buf = out_buf,
114 },
115 {
116 .addr = i2cbus->slave_addr,
117 .flags = I2C_M_RD,
118 .len = 1,
119 .buf = in_buf,
120 }
121 };
122
123 out_buf[0] = addr;
124 out_buf[1] = 0;
125
126 if (i2c_transfer(&i2cbus->adapter, msgs, 2) == 2) {
127 *ch = in_buf[0];
128 return true;
129 };
130
131 if (!tfp->quiet) {
132 DRM_DEBUG("Unable to read register 0x%02x from %s:%02x.\n",
133 addr, i2cbus->adapter.name, i2cbus->slave_addr);
134 }
135 return false;
136 }
137
tfp410_writeb(struct intel_dvo_device * dvo,int addr,uint8_t ch)138 static bool tfp410_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch)
139 {
140 struct tfp410_priv *tfp = dvo->dev_priv;
141 struct intel_i2c_chan *i2cbus = dvo->i2c_bus;
142 uint8_t out_buf[2];
143 struct i2c_msg msg = {
144 .addr = i2cbus->slave_addr,
145 .flags = 0,
146 .len = 2,
147 .buf = out_buf,
148 };
149
150 out_buf[0] = addr;
151 out_buf[1] = ch;
152
153 if (i2c_transfer(&i2cbus->adapter, &msg, 1) == 1)
154 return true;
155
156 if (!tfp->quiet) {
157 DRM_DEBUG("Unable to write register 0x%02x to %s:%d.\n",
158 addr, i2cbus->adapter.name, i2cbus->slave_addr);
159 }
160
161 return false;
162 }
163
tfp410_getid(struct intel_dvo_device * dvo,int addr)164 static int tfp410_getid(struct intel_dvo_device *dvo, int addr)
165 {
166 uint8_t ch1, ch2;
167
168 if (tfp410_readb(dvo, addr+0, &ch1) &&
169 tfp410_readb(dvo, addr+1, &ch2))
170 return ((ch2 << 8) & 0xFF00) | (ch1 & 0x00FF);
171
172 return -1;
173 }
174
175 /* Ti TFP410 driver for chip on i2c bus */
tfp410_init(struct intel_dvo_device * dvo,struct intel_i2c_chan * i2cbus)176 static bool tfp410_init(struct intel_dvo_device *dvo,
177 struct intel_i2c_chan *i2cbus)
178 {
179 /* this will detect the tfp410 chip on the specified i2c bus */
180 struct tfp410_priv *tfp;
181 int id;
182
183 tfp = kzalloc(sizeof(struct tfp410_priv), GFP_KERNEL);
184 if (tfp == NULL)
185 return false;
186
187 dvo->i2c_bus = i2cbus;
188 dvo->i2c_bus->slave_addr = dvo->slave_addr;
189 dvo->dev_priv = tfp;
190 tfp->quiet = true;
191
192 if ((id = tfp410_getid(dvo, TFP410_VID_LO)) != TFP410_VID) {
193 DRM_DEBUG("tfp410 not detected got VID %X: from %s Slave %d.\n",
194 id, i2cbus->adapter.name, i2cbus->slave_addr);
195 goto out;
196 }
197
198 if ((id = tfp410_getid(dvo, TFP410_DID_LO)) != TFP410_DID) {
199 DRM_DEBUG("tfp410 not detected got DID %X: from %s Slave %d.\n",
200 id, i2cbus->adapter.name, i2cbus->slave_addr);
201 goto out;
202 }
203 tfp->quiet = false;
204 return true;
205 out:
206 kfree(tfp);
207 return false;
208 }
209
tfp410_detect(struct intel_dvo_device * dvo)210 static enum drm_connector_status tfp410_detect(struct intel_dvo_device *dvo)
211 {
212 enum drm_connector_status ret = connector_status_disconnected;
213 uint8_t ctl2;
214
215 if (tfp410_readb(dvo, TFP410_CTL_2, &ctl2)) {
216 if (ctl2 & TFP410_CTL_2_HTPLG)
217 ret = connector_status_connected;
218 else
219 ret = connector_status_disconnected;
220 }
221
222 return ret;
223 }
224
tfp410_mode_valid(struct intel_dvo_device * dvo,struct drm_display_mode * mode)225 static enum drm_mode_status tfp410_mode_valid(struct intel_dvo_device *dvo,
226 struct drm_display_mode *mode)
227 {
228 return MODE_OK;
229 }
230
tfp410_mode_set(struct intel_dvo_device * dvo,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)231 static void tfp410_mode_set(struct intel_dvo_device *dvo,
232 struct drm_display_mode *mode,
233 struct drm_display_mode *adjusted_mode)
234 {
235 /* As long as the basics are set up, since we don't have clock dependencies
236 * in the mode setup, we can just leave the registers alone and everything
237 * will work fine.
238 */
239 /* don't do much */
240 return;
241 }
242
243 /* set the tfp410 power state */
tfp410_dpms(struct intel_dvo_device * dvo,int mode)244 static void tfp410_dpms(struct intel_dvo_device *dvo, int mode)
245 {
246 uint8_t ctl1;
247
248 if (!tfp410_readb(dvo, TFP410_CTL_1, &ctl1))
249 return;
250
251 if (mode == DRM_MODE_DPMS_ON)
252 ctl1 |= TFP410_CTL_1_PD;
253 else
254 ctl1 &= ~TFP410_CTL_1_PD;
255
256 tfp410_writeb(dvo, TFP410_CTL_1, ctl1);
257 }
258
tfp410_dump_regs(struct intel_dvo_device * dvo)259 static void tfp410_dump_regs(struct intel_dvo_device *dvo)
260 {
261 uint8_t val, val2;
262
263 tfp410_readb(dvo, TFP410_REV, &val);
264 DRM_DEBUG("TFP410_REV: 0x%02X\n", val);
265 tfp410_readb(dvo, TFP410_CTL_1, &val);
266 DRM_DEBUG("TFP410_CTL1: 0x%02X\n", val);
267 tfp410_readb(dvo, TFP410_CTL_2, &val);
268 DRM_DEBUG("TFP410_CTL2: 0x%02X\n", val);
269 tfp410_readb(dvo, TFP410_CTL_3, &val);
270 DRM_DEBUG("TFP410_CTL3: 0x%02X\n", val);
271 tfp410_readb(dvo, TFP410_USERCFG, &val);
272 DRM_DEBUG("TFP410_USERCFG: 0x%02X\n", val);
273 tfp410_readb(dvo, TFP410_DE_DLY, &val);
274 DRM_DEBUG("TFP410_DE_DLY: 0x%02X\n", val);
275 tfp410_readb(dvo, TFP410_DE_CTL, &val);
276 DRM_DEBUG("TFP410_DE_CTL: 0x%02X\n", val);
277 tfp410_readb(dvo, TFP410_DE_TOP, &val);
278 DRM_DEBUG("TFP410_DE_TOP: 0x%02X\n", val);
279 tfp410_readb(dvo, TFP410_DE_CNT_LO, &val);
280 tfp410_readb(dvo, TFP410_DE_CNT_HI, &val2);
281 DRM_DEBUG("TFP410_DE_CNT: 0x%02X%02X\n", val2, val);
282 tfp410_readb(dvo, TFP410_DE_LIN_LO, &val);
283 tfp410_readb(dvo, TFP410_DE_LIN_HI, &val2);
284 DRM_DEBUG("TFP410_DE_LIN: 0x%02X%02X\n", val2, val);
285 tfp410_readb(dvo, TFP410_H_RES_LO, &val);
286 tfp410_readb(dvo, TFP410_H_RES_HI, &val2);
287 DRM_DEBUG("TFP410_H_RES: 0x%02X%02X\n", val2, val);
288 tfp410_readb(dvo, TFP410_V_RES_LO, &val);
289 tfp410_readb(dvo, TFP410_V_RES_HI, &val2);
290 DRM_DEBUG("TFP410_V_RES: 0x%02X%02X\n", val2, val);
291 }
292
tfp410_save(struct intel_dvo_device * dvo)293 static void tfp410_save(struct intel_dvo_device *dvo)
294 {
295 struct tfp410_priv *tfp = dvo->dev_priv;
296
297 if (!tfp410_readb(dvo, TFP410_CTL_1, &tfp->saved_reg.ctl1))
298 return;
299
300 if (!tfp410_readb(dvo, TFP410_CTL_2, &tfp->saved_reg.ctl2))
301 return;
302 }
303
tfp410_restore(struct intel_dvo_device * dvo)304 static void tfp410_restore(struct intel_dvo_device *dvo)
305 {
306 struct tfp410_priv *tfp = dvo->dev_priv;
307
308 /* Restore it powered down initially */
309 tfp410_writeb(dvo, TFP410_CTL_1, tfp->saved_reg.ctl1 & ~0x1);
310
311 tfp410_writeb(dvo, TFP410_CTL_2, tfp->saved_reg.ctl2);
312 tfp410_writeb(dvo, TFP410_CTL_1, tfp->saved_reg.ctl1);
313 }
314
tfp410_destroy(struct intel_dvo_device * dvo)315 static void tfp410_destroy(struct intel_dvo_device *dvo)
316 {
317 struct tfp410_priv *tfp = dvo->dev_priv;
318
319 if (tfp) {
320 kfree(tfp);
321 dvo->dev_priv = NULL;
322 }
323 }
324
325 struct intel_dvo_dev_ops tfp410_ops = {
326 .init = tfp410_init,
327 .detect = tfp410_detect,
328 .mode_valid = tfp410_mode_valid,
329 .mode_set = tfp410_mode_set,
330 .dpms = tfp410_dpms,
331 .dump_regs = tfp410_dump_regs,
332 .save = tfp410_save,
333 .restore = tfp410_restore,
334 .destroy = tfp410_destroy,
335 };
336