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56e1df49 TS |
1 | /* |
2 | * Samsung MHL interface driver | |
3 | * | |
4 | * Copyright (C) 2011 Samsung Electronics Co.Ltd | |
5 | * Author: Tomasz Stanislawski <t.stanislaws@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/delay.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/freezer.h> | |
16 | #include <linux/gpio.h> | |
17 | #include <linux/i2c.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/irq.h> | |
20 | #include <linux/kthread.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/pm_runtime.h> | |
23 | #include <linux/regulator/machine.h> | |
24 | #include <linux/slab.h> | |
25 | ||
26 | #include <mach/gpio.h> | |
27 | #include <plat/gpio-cfg.h> | |
28 | ||
29 | #include <media/sii9234.h> | |
30 | #include <media/v4l2-subdev.h> | |
31 | ||
32 | MODULE_AUTHOR("Tomasz Stanislawski <t.stanislaws@samsung.com>"); | |
33 | MODULE_DESCRIPTION("Samsung MHL interface driver"); | |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
36 | struct sii9234_context { | |
37 | struct i2c_client *client; | |
38 | struct regulator *power; | |
39 | int gpio_n_reset; | |
40 | struct v4l2_subdev sd; | |
41 | }; | |
42 | ||
43 | static inline struct sii9234_context *sd_to_context(struct v4l2_subdev *sd) | |
44 | { | |
45 | return container_of(sd, struct sii9234_context, sd); | |
46 | } | |
47 | ||
48 | static inline int sii9234_readb(struct i2c_client *client, int addr) | |
49 | { | |
50 | return i2c_smbus_read_byte_data(client, addr); | |
51 | } | |
52 | ||
53 | static inline int sii9234_writeb(struct i2c_client *client, int addr, int value) | |
54 | { | |
55 | return i2c_smbus_write_byte_data(client, addr, value); | |
56 | } | |
57 | ||
58 | static inline int sii9234_writeb_mask(struct i2c_client *client, int addr, | |
59 | int value, int mask) | |
60 | { | |
61 | int ret; | |
62 | ||
63 | ret = i2c_smbus_read_byte_data(client, addr); | |
64 | if (ret < 0) | |
65 | return ret; | |
66 | ret = (ret & ~mask) | (value & mask); | |
67 | return i2c_smbus_write_byte_data(client, addr, ret); | |
68 | } | |
69 | ||
70 | static inline int sii9234_readb_idx(struct i2c_client *client, int addr) | |
71 | { | |
72 | int ret; | |
73 | ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8); | |
74 | if (ret < 0) | |
75 | return ret; | |
76 | ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff); | |
77 | if (ret < 0) | |
78 | return ret; | |
79 | return i2c_smbus_read_byte_data(client, 0xbe); | |
80 | } | |
81 | ||
82 | static inline int sii9234_writeb_idx(struct i2c_client *client, int addr, | |
83 | int value) | |
84 | { | |
85 | int ret; | |
86 | ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8); | |
87 | if (ret < 0) | |
88 | return ret; | |
89 | ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff); | |
90 | if (ret < 0) | |
91 | return ret; | |
92 | ret = i2c_smbus_write_byte_data(client, 0xbe, value); | |
93 | return ret; | |
94 | } | |
95 | ||
96 | static inline int sii9234_writeb_idx_mask(struct i2c_client *client, int addr, | |
97 | int value, int mask) | |
98 | { | |
99 | int ret; | |
100 | ||
101 | ret = sii9234_readb_idx(client, addr); | |
102 | if (ret < 0) | |
103 | return ret; | |
104 | ret = (ret & ~mask) | (value & mask); | |
105 | return sii9234_writeb_idx(client, addr, ret); | |
106 | } | |
107 | ||
108 | static int sii9234_reset(struct sii9234_context *ctx) | |
109 | { | |
110 | struct i2c_client *client = ctx->client; | |
111 | struct device *dev = &client->dev; | |
112 | int ret, tries; | |
113 | ||
114 | gpio_direction_output(ctx->gpio_n_reset, 1); | |
115 | mdelay(1); | |
116 | gpio_direction_output(ctx->gpio_n_reset, 0); | |
117 | mdelay(1); | |
118 | gpio_direction_output(ctx->gpio_n_reset, 1); | |
119 | mdelay(1); | |
120 | ||
121 | /* going to TTPI mode */ | |
122 | ret = sii9234_writeb(client, 0xc7, 0); | |
123 | if (ret < 0) { | |
124 | dev_err(dev, "failed to set TTPI mode\n"); | |
125 | return ret; | |
126 | } | |
127 | for (tries = 0; tries < 100 ; ++tries) { | |
128 | ret = sii9234_readb(client, 0x1b); | |
129 | if (ret > 0) | |
130 | break; | |
131 | if (ret < 0) { | |
132 | dev_err(dev, "failed to reset device\n"); | |
133 | return -EIO; | |
134 | } | |
135 | mdelay(1); | |
136 | } | |
137 | if (tries == 100) { | |
138 | dev_err(dev, "maximal number of tries reached\n"); | |
139 | return -EIO; | |
140 | } | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
145 | static int sii9234_verify_version(struct i2c_client *client) | |
146 | { | |
147 | struct device *dev = &client->dev; | |
148 | int family, rev, tpi_rev, dev_id, sub_id, hdcp, id; | |
149 | ||
150 | family = sii9234_readb(client, 0x1b); | |
151 | rev = sii9234_readb(client, 0x1c) & 0x0f; | |
152 | tpi_rev = sii9234_readb(client, 0x1d) & 0x7f; | |
153 | dev_id = sii9234_readb_idx(client, 0x0103); | |
154 | sub_id = sii9234_readb_idx(client, 0x0102); | |
155 | hdcp = sii9234_readb(client, 0x30); | |
156 | ||
157 | if (family < 0 || rev < 0 || tpi_rev < 0 || dev_id < 0 || | |
158 | sub_id < 0 || hdcp < 0) { | |
159 | dev_err(dev, "failed to read chip's version\n"); | |
160 | return -EIO; | |
161 | } | |
162 | ||
163 | id = (dev_id << 8) | sub_id; | |
164 | ||
165 | dev_info(dev, "chip: SiL%02x family: %02x, rev: %02x\n", | |
166 | id, family, rev); | |
167 | dev_info(dev, "tpi_rev:%02x, hdcp: %02x\n", tpi_rev, hdcp); | |
168 | if (id != 0x9234) { | |
169 | dev_err(dev, "not supported chip\n"); | |
170 | return -ENODEV; | |
171 | } | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | static u8 data[][3] = { | |
177 | /* setup from driver created by doonsoo45.kim */ | |
178 | { 0x01, 0x05, 0x04 }, /* Enable Auto soft reset on SCDT = 0 */ | |
179 | { 0x01, 0x08, 0x35 }, /* Power Up TMDS Tx Core */ | |
180 | { 0x01, 0x0d, 0x1c }, /* HDMI Transcode mode enable */ | |
181 | { 0x01, 0x2b, 0x01 }, /* Enable HDCP Compliance workaround */ | |
182 | { 0x01, 0x79, 0x40 }, /* daniel test...MHL_INT */ | |
183 | { 0x01, 0x80, 0x34 }, /* Enable Rx PLL Clock Value */ | |
184 | { 0x01, 0x90, 0x27 }, /* Enable CBUS discovery */ | |
185 | { 0x01, 0x91, 0xe5 }, /* Skip RGND detection */ | |
186 | { 0x01, 0x92, 0x46 }, /* Force MHD mode */ | |
187 | { 0x01, 0x93, 0xdc }, /* Disable CBUS pull-up during RGND measurement */ | |
188 | { 0x01, 0x94, 0x66 }, /* 1.8V CBUS VTH & GND threshold */ | |
189 | { 0x01, 0x95, 0x31 }, /* RGND block & single discovery attempt */ | |
190 | { 0x01, 0x96, 0x22 }, /* use 1K and 2K setting */ | |
191 | { 0x01, 0xa0, 0x10 }, /* SIMG: Term mode */ | |
192 | { 0x01, 0xa1, 0xfc }, /* Disable internal Mobile HD driver */ | |
193 | { 0x01, 0xa3, 0xfa }, /* SIMG: Output Swing default EB, 3x Clk Mult */ | |
194 | { 0x01, 0xa5, 0x80 }, /* SIMG: RGND Hysterisis, 3x mode for Beast */ | |
195 | { 0x01, 0xa6, 0x0c }, /* SIMG: Swing Offset */ | |
196 | { 0x02, 0x3d, 0x3f }, /* Power up CVCC 1.2V core */ | |
197 | { 0x03, 0x00, 0x00 }, /* SIMG: correcting HW default */ | |
198 | { 0x03, 0x11, 0x01 }, /* Enable TxPLL Clock */ | |
199 | { 0x03, 0x12, 0x15 }, /* Enable Tx Clock Path & Equalizer */ | |
200 | { 0x03, 0x13, 0x60 }, /* SIMG: Set termination value */ | |
201 | { 0x03, 0x14, 0xf0 }, /* SIMG: Change CKDT level */ | |
202 | { 0x03, 0x17, 0x07 }, /* SIMG: PLL Calrefsel */ | |
203 | { 0x03, 0x1a, 0x20 }, /* VCO Cal */ | |
204 | { 0x03, 0x22, 0xe0 }, /* SIMG: Auto EQ */ | |
205 | { 0x03, 0x23, 0xc0 }, /* SIMG: Auto EQ */ | |
206 | { 0x03, 0x24, 0xa0 }, /* SIMG: Auto EQ */ | |
207 | { 0x03, 0x25, 0x80 }, /* SIMG: Auto EQ */ | |
208 | { 0x03, 0x26, 0x60 }, /* SIMG: Auto EQ */ | |
209 | { 0x03, 0x27, 0x40 }, /* SIMG: Auto EQ */ | |
210 | { 0x03, 0x28, 0x20 }, /* SIMG: Auto EQ */ | |
211 | { 0x03, 0x29, 0x00 }, /* SIMG: Auto EQ */ | |
212 | { 0x03, 0x31, 0x0b }, /* SIMG: Rx PLL BW value from I2C BW ~ 4MHz */ | |
213 | { 0x03, 0x45, 0x06 }, /* SIMG: DPLL Mode */ | |
214 | { 0x03, 0x4b, 0x06 }, /* SIMG: Correcting HW default */ | |
215 | { 0x03, 0x4c, 0xa0 }, /* Manual zone control */ | |
216 | { 0x03, 0x4d, 0x02 }, /* SIMG: PLL Mode Value (order is important) */ | |
217 | }; | |
218 | ||
219 | static int sii9234_set_internal(struct sii9234_context *ctx) | |
220 | { | |
221 | struct i2c_client *client = ctx->client; | |
222 | int i, ret; | |
223 | ||
224 | for (i = 0; i < ARRAY_SIZE(data); ++i) { | |
225 | int addr = (data[i][0] << 8) | data[i][1]; | |
226 | ret = sii9234_writeb_idx(client, addr, data[i][2]); | |
227 | if (ret < 0) | |
228 | return ret; | |
229 | } | |
230 | return 0; | |
231 | } | |
232 | ||
233 | static int sii9234_runtime_suspend(struct device *dev) | |
234 | { | |
235 | struct v4l2_subdev *sd = dev_get_drvdata(dev); | |
236 | struct sii9234_context *ctx = sd_to_context(sd); | |
237 | struct i2c_client *client = ctx->client; | |
238 | ||
239 | dev_info(dev, "suspend start\n"); | |
240 | ||
241 | sii9234_writeb_mask(client, 0x1e, 3, 3); | |
242 | regulator_disable(ctx->power); | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | static int sii9234_runtime_resume(struct device *dev) | |
248 | { | |
249 | struct v4l2_subdev *sd = dev_get_drvdata(dev); | |
250 | struct sii9234_context *ctx = sd_to_context(sd); | |
251 | struct i2c_client *client = ctx->client; | |
252 | int ret; | |
253 | ||
254 | dev_info(dev, "resume start\n"); | |
255 | regulator_enable(ctx->power); | |
256 | ||
257 | ret = sii9234_reset(ctx); | |
258 | if (ret) | |
259 | goto fail; | |
260 | ||
261 | /* enable tpi */ | |
262 | ret = sii9234_writeb_mask(client, 0x1e, 1, 0); | |
263 | if (ret < 0) | |
264 | goto fail; | |
265 | ret = sii9234_set_internal(ctx); | |
266 | if (ret < 0) | |
267 | goto fail; | |
268 | ||
269 | return 0; | |
270 | ||
271 | fail: | |
272 | dev_err(dev, "failed to resume\n"); | |
273 | regulator_disable(ctx->power); | |
274 | ||
275 | return ret; | |
276 | } | |
277 | ||
278 | static const struct dev_pm_ops sii9234_pm_ops = { | |
279 | .runtime_suspend = sii9234_runtime_suspend, | |
280 | .runtime_resume = sii9234_runtime_resume, | |
281 | }; | |
282 | ||
283 | static int sii9234_s_power(struct v4l2_subdev *sd, int on) | |
284 | { | |
285 | struct sii9234_context *ctx = sd_to_context(sd); | |
286 | int ret; | |
287 | ||
288 | if (on) | |
289 | ret = pm_runtime_get_sync(&ctx->client->dev); | |
290 | else | |
291 | ret = pm_runtime_put(&ctx->client->dev); | |
292 | /* only values < 0 indicate errors */ | |
293 | return IS_ERR_VALUE(ret) ? ret : 0; | |
294 | } | |
295 | ||
296 | static int sii9234_s_stream(struct v4l2_subdev *sd, int enable) | |
297 | { | |
298 | struct sii9234_context *ctx = sd_to_context(sd); | |
299 | ||
300 | /* (dis/en)able TDMS output */ | |
301 | sii9234_writeb_mask(ctx->client, 0x1a, enable ? 0 : ~0 , 1 << 4); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | static const struct v4l2_subdev_core_ops sii9234_core_ops = { | |
306 | .s_power = sii9234_s_power, | |
307 | }; | |
308 | ||
309 | static const struct v4l2_subdev_video_ops sii9234_video_ops = { | |
310 | .s_stream = sii9234_s_stream, | |
311 | }; | |
312 | ||
313 | static const struct v4l2_subdev_ops sii9234_ops = { | |
314 | .core = &sii9234_core_ops, | |
315 | .video = &sii9234_video_ops, | |
316 | }; | |
317 | ||
318 | static int __devinit sii9234_probe(struct i2c_client *client, | |
319 | const struct i2c_device_id *id) | |
320 | { | |
321 | struct device *dev = &client->dev; | |
322 | struct sii9234_platform_data *pdata = dev->platform_data; | |
323 | struct sii9234_context *ctx; | |
324 | int ret; | |
325 | ||
326 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
327 | if (!ctx) { | |
328 | dev_err(dev, "out of memory\n"); | |
329 | ret = -ENOMEM; | |
330 | goto fail; | |
331 | } | |
332 | ctx->client = client; | |
333 | ||
334 | ctx->power = regulator_get(dev, "hdmi-en"); | |
335 | if (IS_ERR(ctx->power)) { | |
336 | dev_err(dev, "failed to acquire regulator hdmi-en\n"); | |
337 | ret = PTR_ERR(ctx->power); | |
338 | goto fail_ctx; | |
339 | } | |
340 | ||
341 | ctx->gpio_n_reset = pdata->gpio_n_reset; | |
342 | ret = gpio_request(ctx->gpio_n_reset, "MHL_RST"); | |
343 | if (ret) { | |
344 | dev_err(dev, "failed to acquire MHL_RST gpio\n"); | |
345 | goto fail_power; | |
346 | } | |
347 | ||
348 | v4l2_i2c_subdev_init(&ctx->sd, client, &sii9234_ops); | |
349 | ||
350 | pm_runtime_enable(dev); | |
351 | ||
352 | /* enable device */ | |
353 | ret = pm_runtime_get_sync(dev); | |
354 | if (ret) | |
355 | goto fail_pm; | |
356 | ||
357 | /* verify chip version */ | |
358 | ret = sii9234_verify_version(client); | |
359 | if (ret) | |
360 | goto fail_pm_get; | |
361 | ||
362 | /* stop processing */ | |
363 | pm_runtime_put(dev); | |
364 | ||
365 | dev_info(dev, "probe successful\n"); | |
366 | ||
367 | return 0; | |
368 | ||
369 | fail_pm_get: | |
370 | pm_runtime_put_sync(dev); | |
371 | ||
372 | fail_pm: | |
373 | pm_runtime_disable(dev); | |
374 | gpio_free(ctx->gpio_n_reset); | |
375 | ||
376 | fail_power: | |
377 | regulator_put(ctx->power); | |
378 | ||
379 | fail_ctx: | |
380 | kfree(ctx); | |
381 | ||
382 | fail: | |
383 | dev_err(dev, "probe failed\n"); | |
384 | ||
385 | return ret; | |
386 | } | |
387 | ||
388 | static int __devexit sii9234_remove(struct i2c_client *client) | |
389 | { | |
390 | struct device *dev = &client->dev; | |
391 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | |
392 | struct sii9234_context *ctx = sd_to_context(sd); | |
393 | ||
394 | pm_runtime_disable(dev); | |
395 | gpio_free(ctx->gpio_n_reset); | |
396 | regulator_put(ctx->power); | |
397 | kfree(ctx); | |
398 | ||
399 | dev_info(dev, "remove successful\n"); | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | ||
405 | static const struct i2c_device_id sii9234_id[] = { | |
406 | { "SII9234", 0 }, | |
407 | { }, | |
408 | }; | |
409 | ||
410 | MODULE_DEVICE_TABLE(i2c, sii9234_id); | |
411 | static struct i2c_driver sii9234_driver = { | |
412 | .driver = { | |
413 | .name = "sii9234", | |
414 | .owner = THIS_MODULE, | |
415 | .pm = &sii9234_pm_ops, | |
416 | }, | |
417 | .probe = sii9234_probe, | |
418 | .remove = __devexit_p(sii9234_remove), | |
419 | .id_table = sii9234_id, | |
420 | }; | |
421 | ||
02a890d6 | 422 | module_i2c_driver(sii9234_driver); |