1/**************************************************************************
2
3Copyright © 2006 Dave Airlie
4
5All Rights Reserved.
6
7Permission is hereby granted, free of charge, to any person obtaining a
8copy of this software and associated documentation files (the
9"Software"), to deal in the Software without restriction, including
10without limitation the rights to use, copy, modify, merge, publish,
11distribute, sub license, and/or sell copies of the Software, and to
12permit persons to whom the Software is furnished to do so, subject to
13the following conditions:
14
15The above copyright notice and this permission notice (including the
16next paragraph) shall be included in all copies or substantial portions
17of the Software.
18
19THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
23ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26
27**************************************************************************/
28
29#include <drm/drm_print.h>
30
31#include "intel_display_types.h"
32#include "intel_dvo_dev.h"
33
34#define SIL164_VID 0x0001
35#define SIL164_DID 0x0006
36
37#define SIL164_VID_LO 0x00
38#define SIL164_VID_HI 0x01
39#define SIL164_DID_LO 0x02
40#define SIL164_DID_HI 0x03
41#define SIL164_REV 0x04
42#define SIL164_RSVD 0x05
43#define SIL164_FREQ_LO 0x06
44#define SIL164_FREQ_HI 0x07
45
46#define SIL164_REG8 0x08
47#define SIL164_8_VEN (1<<5)
48#define SIL164_8_HEN (1<<4)
49#define SIL164_8_DSEL (1<<3)
50#define SIL164_8_BSEL (1<<2)
51#define SIL164_8_EDGE (1<<1)
52#define SIL164_8_PD (1<<0)
53
54#define SIL164_REG9 0x09
55#define SIL164_9_VLOW (1<<7)
56#define SIL164_9_MSEL_MASK (0x7<<4)
57#define SIL164_9_TSEL (1<<3)
58#define SIL164_9_RSEN (1<<2)
59#define SIL164_9_HTPLG (1<<1)
60#define SIL164_9_MDI (1<<0)
61
62#define SIL164_REGC 0x0c
63#define SIL164_C_SCNT (1<<7)
64#define SIL164_C_PLLF_MASK (0xf<<1)
65#define SIL164_C_PLLF_REC (4<<1)
66#define SIL164_C_PFEN (1<<0)
67
68struct sil164_priv {
69 //I2CDevRec d;
70 bool quiet;
71};
72
73#define SILPTR(d) ((SIL164Ptr)(d->DriverPrivate.ptr))
74
75static bool sil164_readb(struct intel_dvo_device *dvo, int addr, u8 *ch)
76{
77 struct sil164_priv *sil = dvo->dev_priv;
78 struct i2c_adapter *adapter = dvo->i2c_bus;
79 u8 out_buf[2];
80 u8 in_buf[2];
81
82 struct i2c_msg msgs[] = {
83 {
84 .addr = dvo->target_addr,
85 .flags = 0,
86 .len = 1,
87 .buf = out_buf,
88 },
89 {
90 .addr = dvo->target_addr,
91 .flags = I2C_M_RD,
92 .len = 1,
93 .buf = in_buf,
94 }
95 };
96
97 out_buf[0] = addr;
98 out_buf[1] = 0;
99
100 if (i2c_transfer(adap: adapter, msgs, num: 2) == 2) {
101 *ch = in_buf[0];
102 return true;
103 }
104
105 if (!sil->quiet) {
106 DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",
107 addr, adapter->name, dvo->target_addr);
108 }
109 return false;
110}
111
112static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, u8 ch)
113{
114 struct sil164_priv *sil = dvo->dev_priv;
115 struct i2c_adapter *adapter = dvo->i2c_bus;
116 u8 out_buf[2];
117 struct i2c_msg msg = {
118 .addr = dvo->target_addr,
119 .flags = 0,
120 .len = 2,
121 .buf = out_buf,
122 };
123
124 out_buf[0] = addr;
125 out_buf[1] = ch;
126
127 if (i2c_transfer(adap: adapter, msgs: &msg, num: 1) == 1)
128 return true;
129
130 if (!sil->quiet) {
131 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",
132 addr, adapter->name, dvo->target_addr);
133 }
134
135 return false;
136}
137
138/* Silicon Image 164 driver for chip on i2c bus */
139static bool sil164_init(struct intel_dvo_device *dvo,
140 struct i2c_adapter *adapter)
141{
142 /* this will detect the SIL164 chip on the specified i2c bus */
143 struct sil164_priv *sil;
144 unsigned char ch;
145
146 sil = kzalloc(sizeof(*sil), GFP_KERNEL);
147 if (sil == NULL)
148 return false;
149
150 dvo->i2c_bus = adapter;
151 dvo->dev_priv = sil;
152 sil->quiet = true;
153
154 if (!sil164_readb(dvo, SIL164_VID_LO, ch: &ch))
155 goto out;
156
157 if (ch != (SIL164_VID & 0xff)) {
158 DRM_DEBUG_KMS("sil164 not detected got %d: from %s Target %d.\n",
159 ch, adapter->name, dvo->target_addr);
160 goto out;
161 }
162
163 if (!sil164_readb(dvo, SIL164_DID_LO, ch: &ch))
164 goto out;
165
166 if (ch != (SIL164_DID & 0xff)) {
167 DRM_DEBUG_KMS("sil164 not detected got %d: from %s Target %d.\n",
168 ch, adapter->name, dvo->target_addr);
169 goto out;
170 }
171 sil->quiet = false;
172
173 DRM_DEBUG_KMS("init sil164 dvo controller successfully!\n");
174 return true;
175
176out:
177 kfree(objp: sil);
178 return false;
179}
180
181static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo)
182{
183 u8 reg9;
184
185 sil164_readb(dvo, SIL164_REG9, ch: &reg9);
186
187 if (reg9 & SIL164_9_HTPLG)
188 return connector_status_connected;
189 else
190 return connector_status_disconnected;
191}
192
193static enum drm_mode_status sil164_mode_valid(struct intel_dvo_device *dvo,
194 const struct drm_display_mode *mode)
195{
196 return MODE_OK;
197}
198
199static void sil164_mode_set(struct intel_dvo_device *dvo,
200 const struct drm_display_mode *mode,
201 const struct drm_display_mode *adjusted_mode)
202{
203 /* As long as the basics are set up, since we don't have clock
204 * dependencies in the mode setup, we can just leave the
205 * registers alone and everything will work fine.
206 */
207 /* recommended programming sequence from doc */
208 /*sil164_writeb(sil, 0x08, 0x30);
209 sil164_writeb(sil, 0x09, 0x00);
210 sil164_writeb(sil, 0x0a, 0x90);
211 sil164_writeb(sil, 0x0c, 0x89);
212 sil164_writeb(sil, 0x08, 0x31);*/
213 /* don't do much */
214
215 sil164_writeb(dvo, SIL164_REG8,
216 SIL164_8_VEN | SIL164_8_HEN);
217 sil164_writeb(dvo, SIL164_REG9,
218 SIL164_9_TSEL);
219 sil164_writeb(dvo, SIL164_REGC,
220 SIL164_C_PLLF_REC | SIL164_C_PFEN);
221}
222
223/* set the SIL164 power state */
224static void sil164_dpms(struct intel_dvo_device *dvo, bool enable)
225{
226 int ret;
227 unsigned char ch;
228
229 ret = sil164_readb(dvo, SIL164_REG8, ch: &ch);
230 if (ret == false)
231 return;
232
233 if (enable)
234 ch |= SIL164_8_PD;
235 else
236 ch &= ~SIL164_8_PD;
237
238 sil164_writeb(dvo, SIL164_REG8, ch);
239}
240
241static bool sil164_get_hw_state(struct intel_dvo_device *dvo)
242{
243 int ret;
244 unsigned char ch;
245
246 ret = sil164_readb(dvo, SIL164_REG8, ch: &ch);
247 if (ret == false)
248 return false;
249
250 if (ch & SIL164_8_PD)
251 return true;
252 else
253 return false;
254}
255
256static void sil164_dump_regs(struct intel_dvo_device *dvo)
257{
258 u8 val;
259
260 sil164_readb(dvo, SIL164_FREQ_LO, ch: &val);
261 DRM_DEBUG_KMS("SIL164_FREQ_LO: 0x%02x\n", val);
262 sil164_readb(dvo, SIL164_FREQ_HI, ch: &val);
263 DRM_DEBUG_KMS("SIL164_FREQ_HI: 0x%02x\n", val);
264 sil164_readb(dvo, SIL164_REG8, ch: &val);
265 DRM_DEBUG_KMS("SIL164_REG8: 0x%02x\n", val);
266 sil164_readb(dvo, SIL164_REG9, ch: &val);
267 DRM_DEBUG_KMS("SIL164_REG9: 0x%02x\n", val);
268 sil164_readb(dvo, SIL164_REGC, ch: &val);
269 DRM_DEBUG_KMS("SIL164_REGC: 0x%02x\n", val);
270}
271
272static void sil164_destroy(struct intel_dvo_device *dvo)
273{
274 struct sil164_priv *sil = dvo->dev_priv;
275
276 if (sil) {
277 kfree(objp: sil);
278 dvo->dev_priv = NULL;
279 }
280}
281
282const struct intel_dvo_dev_ops sil164_ops = {
283 .init = sil164_init,
284 .detect = sil164_detect,
285 .mode_valid = sil164_mode_valid,
286 .mode_set = sil164_mode_set,
287 .dpms = sil164_dpms,
288 .get_hw_state = sil164_get_hw_state,
289 .dump_regs = sil164_dump_regs,
290 .destroy = sil164_destroy,
291};
292