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_priv { |
90 | bool quiet; |
91 | }; |
92 | |
93 | static bool tfp410_readb(struct intel_dvo_device *dvo, int addr, uint8_t *ch) |
94 | { |
95 | struct tfp410_priv *tfp = dvo->dev_priv; |
96 | struct i2c_adapter *adapter = dvo->i2c_bus; |
97 | u8 out_buf[2]; |
98 | u8 in_buf[2]; |
99 | |
100 | struct i2c_msg msgs[] = { |
101 | { |
102 | .addr = dvo->slave_addr, |
103 | .flags = 0, |
104 | .len = 1, |
105 | .buf = out_buf, |
106 | }, |
107 | { |
108 | .addr = dvo->slave_addr, |
109 | .flags = I2C_M_RD, |
110 | .len = 1, |
111 | .buf = in_buf, |
112 | } |
113 | }; |
114 | |
115 | out_buf[0] = addr; |
116 | out_buf[1] = 0; |
117 | |
118 | if (i2c_transfer(adapter, msgs, 2) == 2) { |
119 | *ch = in_buf[0]; |
120 | return true; |
121 | }; |
122 | |
123 | if (!tfp->quiet) { |
124 | DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n" , |
125 | addr, adapter->name, dvo->slave_addr); |
126 | } |
127 | return false; |
128 | } |
129 | |
130 | static bool tfp410_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch) |
131 | { |
132 | struct tfp410_priv *tfp = dvo->dev_priv; |
133 | struct i2c_adapter *adapter = dvo->i2c_bus; |
134 | uint8_t out_buf[2]; |
135 | struct i2c_msg msg = { |
136 | .addr = dvo->slave_addr, |
137 | .flags = 0, |
138 | .len = 2, |
139 | .buf = out_buf, |
140 | }; |
141 | |
142 | out_buf[0] = addr; |
143 | out_buf[1] = ch; |
144 | |
145 | if (i2c_transfer(adapter, &msg, 1) == 1) |
146 | return true; |
147 | |
148 | if (!tfp->quiet) { |
149 | DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n" , |
150 | addr, adapter->name, dvo->slave_addr); |
151 | } |
152 | |
153 | return false; |
154 | } |
155 | |
156 | static int tfp410_getid(struct intel_dvo_device *dvo, int addr) |
157 | { |
158 | uint8_t ch1, ch2; |
159 | |
160 | if (tfp410_readb(dvo, addr+0, &ch1) && |
161 | tfp410_readb(dvo, addr+1, &ch2)) |
162 | return ((ch2 << 8) & 0xFF00) | (ch1 & 0x00FF); |
163 | |
164 | return -1; |
165 | } |
166 | |
167 | /* Ti TFP410 driver for chip on i2c bus */ |
168 | static bool tfp410_init(struct intel_dvo_device *dvo, |
169 | struct i2c_adapter *adapter) |
170 | { |
171 | /* this will detect the tfp410 chip on the specified i2c bus */ |
172 | struct tfp410_priv *tfp; |
173 | int id; |
174 | |
175 | tfp = kzalloc(sizeof(struct tfp410_priv), GFP_KERNEL); |
176 | if (tfp == NULL) |
177 | return false; |
178 | |
179 | dvo->i2c_bus = adapter; |
180 | dvo->dev_priv = tfp; |
181 | tfp->quiet = true; |
182 | |
183 | if ((id = tfp410_getid(dvo, TFP410_VID_LO)) != TFP410_VID) { |
184 | DRM_DEBUG_KMS("tfp410 not detected got VID %X: from %s " |
185 | "Slave %d.\n" , |
186 | id, adapter->name, dvo->slave_addr); |
187 | goto out; |
188 | } |
189 | |
190 | if ((id = tfp410_getid(dvo, TFP410_DID_LO)) != TFP410_DID) { |
191 | DRM_DEBUG_KMS("tfp410 not detected got DID %X: from %s " |
192 | "Slave %d.\n" , |
193 | id, adapter->name, dvo->slave_addr); |
194 | goto out; |
195 | } |
196 | tfp->quiet = false; |
197 | return true; |
198 | out: |
199 | kfree(tfp); |
200 | return false; |
201 | } |
202 | |
203 | static enum drm_connector_status tfp410_detect(struct intel_dvo_device *dvo) |
204 | { |
205 | enum drm_connector_status ret = connector_status_disconnected; |
206 | uint8_t ctl2; |
207 | |
208 | if (tfp410_readb(dvo, TFP410_CTL_2, &ctl2)) { |
209 | if (ctl2 & TFP410_CTL_2_RSEN) |
210 | ret = connector_status_connected; |
211 | else |
212 | ret = connector_status_disconnected; |
213 | } |
214 | |
215 | return ret; |
216 | } |
217 | |
218 | static enum drm_mode_status tfp410_mode_valid(struct intel_dvo_device *dvo, |
219 | struct drm_display_mode *mode) |
220 | { |
221 | return MODE_OK; |
222 | } |
223 | |
224 | static void tfp410_mode_set(struct intel_dvo_device *dvo, |
225 | struct drm_display_mode *mode, |
226 | struct drm_display_mode *adjusted_mode) |
227 | { |
228 | /* As long as the basics are set up, since we don't have clock dependencies |
229 | * in the mode setup, we can just leave the registers alone and everything |
230 | * will work fine. |
231 | */ |
232 | /* don't do much */ |
233 | return; |
234 | } |
235 | |
236 | /* set the tfp410 power state */ |
237 | static void tfp410_dpms(struct intel_dvo_device *dvo, bool enable) |
238 | { |
239 | uint8_t ctl1; |
240 | |
241 | if (!tfp410_readb(dvo, TFP410_CTL_1, &ctl1)) |
242 | return; |
243 | |
244 | if (enable) |
245 | ctl1 |= TFP410_CTL_1_PD; |
246 | else |
247 | ctl1 &= ~TFP410_CTL_1_PD; |
248 | |
249 | tfp410_writeb(dvo, TFP410_CTL_1, ctl1); |
250 | } |
251 | |
252 | static bool tfp410_get_hw_state(struct intel_dvo_device *dvo) |
253 | { |
254 | uint8_t ctl1; |
255 | |
256 | if (!tfp410_readb(dvo, TFP410_CTL_1, &ctl1)) |
257 | return false; |
258 | |
259 | if (ctl1 & TFP410_CTL_1_PD) |
260 | return true; |
261 | else |
262 | return false; |
263 | } |
264 | |
265 | static void tfp410_dump_regs(struct intel_dvo_device *dvo) |
266 | { |
267 | uint8_t val, val2; |
268 | |
269 | tfp410_readb(dvo, TFP410_REV, &val); |
270 | DRM_DEBUG_KMS("TFP410_REV: 0x%02X\n" , val); |
271 | tfp410_readb(dvo, TFP410_CTL_1, &val); |
272 | DRM_DEBUG_KMS("TFP410_CTL1: 0x%02X\n" , val); |
273 | tfp410_readb(dvo, TFP410_CTL_2, &val); |
274 | DRM_DEBUG_KMS("TFP410_CTL2: 0x%02X\n" , val); |
275 | tfp410_readb(dvo, TFP410_CTL_3, &val); |
276 | DRM_DEBUG_KMS("TFP410_CTL3: 0x%02X\n" , val); |
277 | tfp410_readb(dvo, TFP410_USERCFG, &val); |
278 | DRM_DEBUG_KMS("TFP410_USERCFG: 0x%02X\n" , val); |
279 | tfp410_readb(dvo, TFP410_DE_DLY, &val); |
280 | DRM_DEBUG_KMS("TFP410_DE_DLY: 0x%02X\n" , val); |
281 | tfp410_readb(dvo, TFP410_DE_CTL, &val); |
282 | DRM_DEBUG_KMS("TFP410_DE_CTL: 0x%02X\n" , val); |
283 | tfp410_readb(dvo, TFP410_DE_TOP, &val); |
284 | DRM_DEBUG_KMS("TFP410_DE_TOP: 0x%02X\n" , val); |
285 | tfp410_readb(dvo, TFP410_DE_CNT_LO, &val); |
286 | tfp410_readb(dvo, TFP410_DE_CNT_HI, &val2); |
287 | DRM_DEBUG_KMS("TFP410_DE_CNT: 0x%02X%02X\n" , val2, val); |
288 | tfp410_readb(dvo, TFP410_DE_LIN_LO, &val); |
289 | tfp410_readb(dvo, TFP410_DE_LIN_HI, &val2); |
290 | DRM_DEBUG_KMS("TFP410_DE_LIN: 0x%02X%02X\n" , val2, val); |
291 | tfp410_readb(dvo, TFP410_H_RES_LO, &val); |
292 | tfp410_readb(dvo, TFP410_H_RES_HI, &val2); |
293 | DRM_DEBUG_KMS("TFP410_H_RES: 0x%02X%02X\n" , val2, val); |
294 | tfp410_readb(dvo, TFP410_V_RES_LO, &val); |
295 | tfp410_readb(dvo, TFP410_V_RES_HI, &val2); |
296 | DRM_DEBUG_KMS("TFP410_V_RES: 0x%02X%02X\n" , val2, val); |
297 | } |
298 | |
299 | static void tfp410_destroy(struct intel_dvo_device *dvo) |
300 | { |
301 | struct tfp410_priv *tfp = dvo->dev_priv; |
302 | |
303 | if (tfp) { |
304 | kfree(tfp); |
305 | dvo->dev_priv = NULL; |
306 | } |
307 | } |
308 | |
309 | struct intel_dvo_dev_ops tfp410_ops = { |
310 | .init = tfp410_init, |
311 | .detect = tfp410_detect, |
312 | .mode_valid = tfp410_mode_valid, |
313 | .mode_set = tfp410_mode_set, |
314 | .dpms = tfp410_dpms, |
315 | .get_hw_state = tfp410_get_hw_state, |
316 | .dump_regs = tfp410_dump_regs, |
317 | .destroy = tfp410_destroy, |
318 | }; |
319 | |