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 "intel_display_types.h"
30 #include "intel_dvo_dev.h"
31 
32 #define CH7xxx_REG_VID		0x4a
33 #define CH7xxx_REG_DID		0x4b
34 
35 #define CH7011_VID		0x83 /* 7010 as well */
36 #define CH7010B_VID		0x05
37 #define CH7009A_VID		0x84
38 #define CH7009B_VID		0x85
39 #define CH7301_VID		0x95
40 
41 #define CH7xxx_VID		0x84
42 #define CH7xxx_DID		0x17
43 #define CH7010_DID		0x16
44 
45 #define CH7xxx_NUM_REGS		0x4c
46 
47 #define CH7xxx_CM		0x1c
48 #define CH7xxx_CM_XCM		(1<<0)
49 #define CH7xxx_CM_MCP		(1<<2)
50 #define CH7xxx_INPUT_CLOCK	0x1d
51 #define CH7xxx_GPIO		0x1e
52 #define CH7xxx_GPIO_HPIR	(1<<3)
53 #define CH7xxx_IDF		0x1f
54 
55 #define CH7xxx_IDF_HSP		(1<<3)
56 #define CH7xxx_IDF_VSP		(1<<4)
57 
58 #define CH7xxx_CONNECTION_DETECT 0x20
59 #define CH7xxx_CDET_DVI		(1<<5)
60 
61 #define CH7301_DAC_CNTL		0x21
62 #define CH7301_HOTPLUG		0x23
63 #define CH7xxx_TCTL		0x31
64 #define CH7xxx_TVCO		0x32
65 #define CH7xxx_TPCP		0x33
66 #define CH7xxx_TPD		0x34
67 #define CH7xxx_TPVT		0x35
68 #define CH7xxx_TLPF		0x36
69 #define CH7xxx_TCT		0x37
70 #define CH7301_TEST_PATTERN	0x48
71 
72 #define CH7xxx_PM		0x49
73 #define CH7xxx_PM_FPD		(1<<0)
74 #define CH7301_PM_DACPD0	(1<<1)
75 #define CH7301_PM_DACPD1	(1<<2)
76 #define CH7301_PM_DACPD2	(1<<3)
77 #define CH7xxx_PM_DVIL		(1<<6)
78 #define CH7xxx_PM_DVIP		(1<<7)
79 
80 #define CH7301_SYNC_POLARITY	0x56
81 #define CH7301_SYNC_RGB_YUV	(1<<0)
82 #define CH7301_SYNC_POL_DVI	(1<<5)
83 
84 /** @file
85  * driver for the Chrontel 7xxx DVI chip over DVO.
86  */
87 
88 static struct ch7xxx_id_struct {
89 	u8 vid;
90 	char *name;
91 } ch7xxx_ids[] = {
92 	{ CH7011_VID, "CH7011" },
93 	{ CH7010B_VID, "CH7010B" },
94 	{ CH7009A_VID, "CH7009A" },
95 	{ CH7009B_VID, "CH7009B" },
96 	{ CH7301_VID, "CH7301" },
97 };
98 
99 static struct ch7xxx_did_struct {
100 	u8 did;
101 	char *name;
102 } ch7xxx_dids[] = {
103 	{ CH7xxx_DID, "CH7XXX" },
104 	{ CH7010_DID, "CH7010B" },
105 };
106 
107 struct ch7xxx_priv {
108 	bool quiet;
109 };
110 
111 static char *ch7xxx_get_id(u8 vid)
112 {
113 	int i;
114 
115 	for (i = 0; i < ARRAY_SIZE(ch7xxx_ids); i++) {
116 		if (ch7xxx_ids[i].vid == vid)
117 			return ch7xxx_ids[i].name;
118 	}
119 
120 	return NULL;
121 }
122 
123 static char *ch7xxx_get_did(u8 did)
124 {
125 	int i;
126 
127 	for (i = 0; i < ARRAY_SIZE(ch7xxx_dids); i++) {
128 		if (ch7xxx_dids[i].did == did)
129 			return ch7xxx_dids[i].name;
130 	}
131 
132 	return NULL;
133 }
134 
135 /** Reads an 8 bit register */
136 static bool ch7xxx_readb(struct intel_dvo_device *dvo, int addr, u8 *ch)
137 {
138 	struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
139 	struct i2c_adapter *adapter = dvo->i2c_bus;
140 	u8 out_buf[2];
141 	u8 in_buf[2];
142 
143 	struct i2c_msg msgs[] = {
144 		{
145 			.addr = dvo->slave_addr,
146 			.flags = 0,
147 			.len = 1,
148 			.buf = out_buf,
149 		},
150 		{
151 			.addr = dvo->slave_addr,
152 			.flags = I2C_M_RD,
153 			.len = 1,
154 			.buf = in_buf,
155 		}
156 	};
157 
158 	out_buf[0] = addr;
159 	out_buf[1] = 0;
160 
161 	if (i2c_transfer(adapter, msgs, 2) == 2) {
162 		*ch = in_buf[0];
163 		return true;
164 	}
165 
166 	if (!ch7xxx->quiet) {
167 		DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",
168 			  addr, adapter->name, dvo->slave_addr);
169 	}
170 	return false;
171 }
172 
173 /** Writes an 8 bit register */
174 static bool ch7xxx_writeb(struct intel_dvo_device *dvo, int addr, u8 ch)
175 {
176 	struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
177 	struct i2c_adapter *adapter = dvo->i2c_bus;
178 	u8 out_buf[2];
179 	struct i2c_msg msg = {
180 		.addr = dvo->slave_addr,
181 		.flags = 0,
182 		.len = 2,
183 		.buf = out_buf,
184 	};
185 
186 	out_buf[0] = addr;
187 	out_buf[1] = ch;
188 
189 	if (i2c_transfer(adapter, &msg, 1) == 1)
190 		return true;
191 
192 	if (!ch7xxx->quiet) {
193 		DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",
194 			  addr, adapter->name, dvo->slave_addr);
195 	}
196 
197 	return false;
198 }
199 
200 static bool ch7xxx_init(struct intel_dvo_device *dvo,
201 			struct i2c_adapter *adapter)
202 {
203 	/* this will detect the CH7xxx chip on the specified i2c bus */
204 	struct ch7xxx_priv *ch7xxx;
205 	u8 vendor, device;
206 	char *name, *devid;
207 
208 	ch7xxx = kzalloc(sizeof(struct ch7xxx_priv), GFP_KERNEL);
209 	if (ch7xxx == NULL)
210 		return false;
211 
212 	dvo->i2c_bus = adapter;
213 	dvo->dev_priv = ch7xxx;
214 	ch7xxx->quiet = true;
215 
216 	if (!ch7xxx_readb(dvo, CH7xxx_REG_VID, &vendor))
217 		goto out;
218 
219 	name = ch7xxx_get_id(vendor);
220 	if (!name) {
221 		DRM_DEBUG_KMS("ch7xxx not detected; got VID 0x%02x from %s 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 DID 0x%02x from %s slave %d.\n",
233 			      device, adapter->name, dvo->slave_addr);
234 		goto out;
235 	}
236 
237 	ch7xxx->quiet = false;
238 	DRM_DEBUG_KMS("Detected %s chipset, vendor/device ID 0x%02x/0x%02x\n",
239 		  name, vendor, device);
240 	return true;
241 out:
242 	kfree(ch7xxx);
243 	return false;
244 }
245 
246 static enum drm_connector_status ch7xxx_detect(struct intel_dvo_device *dvo)
247 {
248 	u8 cdet, orig_pm, pm;
249 
250 	ch7xxx_readb(dvo, CH7xxx_PM, &orig_pm);
251 
252 	pm = orig_pm;
253 	pm &= ~CH7xxx_PM_FPD;
254 	pm |= CH7xxx_PM_DVIL | CH7xxx_PM_DVIP;
255 
256 	ch7xxx_writeb(dvo, CH7xxx_PM, pm);
257 
258 	ch7xxx_readb(dvo, CH7xxx_CONNECTION_DETECT, &cdet);
259 
260 	ch7xxx_writeb(dvo, CH7xxx_PM, orig_pm);
261 
262 	if (cdet & CH7xxx_CDET_DVI)
263 		return connector_status_connected;
264 	return connector_status_disconnected;
265 }
266 
267 static enum drm_mode_status ch7xxx_mode_valid(struct intel_dvo_device *dvo,
268 					      struct drm_display_mode *mode)
269 {
270 	if (mode->clock > 165000)
271 		return MODE_CLOCK_HIGH;
272 
273 	return MODE_OK;
274 }
275 
276 static void ch7xxx_mode_set(struct intel_dvo_device *dvo,
277 			    const struct drm_display_mode *mode,
278 			    const struct drm_display_mode *adjusted_mode)
279 {
280 	u8 tvco, tpcp, tpd, tlpf, idf;
281 
282 	if (mode->clock <= 65000) {
283 		tvco = 0x23;
284 		tpcp = 0x08;
285 		tpd = 0x16;
286 		tlpf = 0x60;
287 	} else {
288 		tvco = 0x2d;
289 		tpcp = 0x06;
290 		tpd = 0x26;
291 		tlpf = 0xa0;
292 	}
293 
294 	ch7xxx_writeb(dvo, CH7xxx_TCTL, 0x00);
295 	ch7xxx_writeb(dvo, CH7xxx_TVCO, tvco);
296 	ch7xxx_writeb(dvo, CH7xxx_TPCP, tpcp);
297 	ch7xxx_writeb(dvo, CH7xxx_TPD, tpd);
298 	ch7xxx_writeb(dvo, CH7xxx_TPVT, 0x30);
299 	ch7xxx_writeb(dvo, CH7xxx_TLPF, tlpf);
300 	ch7xxx_writeb(dvo, CH7xxx_TCT, 0x00);
301 
302 	ch7xxx_readb(dvo, CH7xxx_IDF, &idf);
303 
304 	idf &= ~(CH7xxx_IDF_HSP | CH7xxx_IDF_VSP);
305 	if (mode->flags & DRM_MODE_FLAG_PHSYNC)
306 		idf |= CH7xxx_IDF_HSP;
307 
308 	if (mode->flags & DRM_MODE_FLAG_PVSYNC)
309 		idf |= CH7xxx_IDF_VSP;
310 
311 	ch7xxx_writeb(dvo, CH7xxx_IDF, idf);
312 }
313 
314 /* set the CH7xxx power state */
315 static void ch7xxx_dpms(struct intel_dvo_device *dvo, bool enable)
316 {
317 	if (enable)
318 		ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_DVIL | CH7xxx_PM_DVIP);
319 	else
320 		ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_FPD);
321 }
322 
323 static bool ch7xxx_get_hw_state(struct intel_dvo_device *dvo)
324 {
325 	u8 val;
326 
327 	ch7xxx_readb(dvo, CH7xxx_PM, &val);
328 
329 	if (val & (CH7xxx_PM_DVIL | CH7xxx_PM_DVIP))
330 		return true;
331 	else
332 		return false;
333 }
334 
335 static void ch7xxx_dump_regs(struct intel_dvo_device *dvo)
336 {
337 	int i;
338 
339 	for (i = 0; i < CH7xxx_NUM_REGS; i++) {
340 		u8 val;
341 		if ((i % 8) == 0)
342 			DRM_DEBUG_KMS("\n %02X: ", i);
343 		ch7xxx_readb(dvo, i, &val);
344 		DRM_DEBUG_KMS("%02X ", val);
345 	}
346 }
347 
348 static void ch7xxx_destroy(struct intel_dvo_device *dvo)
349 {
350 	struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
351 
352 	if (ch7xxx) {
353 		kfree(ch7xxx);
354 		dvo->dev_priv = NULL;
355 	}
356 }
357 
358 const struct intel_dvo_dev_ops ch7xxx_ops = {
359 	.init = ch7xxx_init,
360 	.detect = ch7xxx_detect,
361 	.mode_valid = ch7xxx_mode_valid,
362 	.mode_set = ch7xxx_mode_set,
363 	.dpms = ch7xxx_dpms,
364 	.get_hw_state = ch7xxx_get_hw_state,
365 	.dump_regs = ch7xxx_dump_regs,
366 	.destroy = ch7xxx_destroy,
367 };
368