Commit | Line | Data |
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fef1c8d0 TS |
1 | /* |
2 | * Samsung TV Mixer driver | |
3 | * | |
4 | * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd. | |
5 | * | |
6 | * Tomasz Stanislawski, <t.stanislaws@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published | |
10 | * by the Free Software Foundiation. either version 2 of the License, | |
11 | * or (at your option) any later version | |
12 | */ | |
13 | ||
14 | #include "mixer.h" | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/io.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/irq.h> | |
21 | #include <linux/fb.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/pm_runtime.h> | |
24 | #include <linux/clk.h> | |
25 | ||
26 | MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>"); | |
27 | MODULE_DESCRIPTION("Samsung MIXER"); | |
28 | MODULE_LICENSE("GPL"); | |
29 | ||
30 | /* --------- DRIVER PARAMETERS ---------- */ | |
31 | ||
32 | static struct mxr_output_conf mxr_output_conf[] = { | |
33 | { | |
34 | .output_name = "S5P HDMI connector", | |
35 | .module_name = "s5p-hdmi", | |
36 | .cookie = 1, | |
37 | }, | |
38 | { | |
39 | .output_name = "S5P SDO connector", | |
40 | .module_name = "s5p-sdo", | |
41 | .cookie = 0, | |
42 | }, | |
43 | }; | |
44 | ||
45 | void mxr_get_mbus_fmt(struct mxr_device *mdev, | |
46 | struct v4l2_mbus_framefmt *mbus_fmt) | |
47 | { | |
48 | struct v4l2_subdev *sd; | |
49 | int ret; | |
50 | ||
51 | mutex_lock(&mdev->mutex); | |
52 | sd = to_outsd(mdev); | |
53 | ret = v4l2_subdev_call(sd, video, g_mbus_fmt, mbus_fmt); | |
54 | WARN(ret, "failed to get mbus_fmt for output %s\n", sd->name); | |
55 | mutex_unlock(&mdev->mutex); | |
56 | } | |
57 | ||
58 | void mxr_streamer_get(struct mxr_device *mdev) | |
59 | { | |
60 | mutex_lock(&mdev->mutex); | |
61 | ++mdev->n_streamer; | |
62 | mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_streamer); | |
63 | if (mdev->n_streamer == 1) { | |
64 | struct v4l2_subdev *sd = to_outsd(mdev); | |
65 | struct v4l2_mbus_framefmt mbus_fmt; | |
66 | struct mxr_resources *res = &mdev->res; | |
67 | int ret; | |
68 | ||
69 | if (to_output(mdev)->cookie == 0) | |
70 | clk_set_parent(res->sclk_mixer, res->sclk_dac); | |
71 | else | |
72 | clk_set_parent(res->sclk_mixer, res->sclk_hdmi); | |
73 | mxr_reg_s_output(mdev, to_output(mdev)->cookie); | |
74 | ||
75 | ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mbus_fmt); | |
76 | WARN(ret, "failed to get mbus_fmt for output %s\n", sd->name); | |
77 | ret = v4l2_subdev_call(sd, video, s_stream, 1); | |
78 | WARN(ret, "starting stream failed for output %s\n", sd->name); | |
79 | ||
80 | mxr_reg_set_mbus_fmt(mdev, &mbus_fmt); | |
81 | mxr_reg_streamon(mdev); | |
82 | ret = mxr_reg_wait4vsync(mdev); | |
83 | WARN(ret, "failed to get vsync (%d) from output\n", ret); | |
84 | } | |
85 | mutex_unlock(&mdev->mutex); | |
86 | mxr_reg_dump(mdev); | |
87 | /* FIXME: what to do when streaming fails? */ | |
88 | } | |
89 | ||
90 | void mxr_streamer_put(struct mxr_device *mdev) | |
91 | { | |
92 | mutex_lock(&mdev->mutex); | |
93 | --mdev->n_streamer; | |
94 | mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_streamer); | |
95 | if (mdev->n_streamer == 0) { | |
96 | int ret; | |
97 | struct v4l2_subdev *sd = to_outsd(mdev); | |
98 | ||
99 | mxr_reg_streamoff(mdev); | |
100 | /* vsync applies Mixer setup */ | |
101 | ret = mxr_reg_wait4vsync(mdev); | |
102 | WARN(ret, "failed to get vsync (%d) from output\n", ret); | |
103 | ret = v4l2_subdev_call(sd, video, s_stream, 0); | |
104 | WARN(ret, "stopping stream failed for output %s\n", sd->name); | |
105 | } | |
106 | WARN(mdev->n_streamer < 0, "negative number of streamers (%d)\n", | |
107 | mdev->n_streamer); | |
108 | mutex_unlock(&mdev->mutex); | |
109 | mxr_reg_dump(mdev); | |
110 | } | |
111 | ||
112 | void mxr_output_get(struct mxr_device *mdev) | |
113 | { | |
114 | mutex_lock(&mdev->mutex); | |
115 | ++mdev->n_output; | |
116 | mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_output); | |
117 | /* turn on auxiliary driver */ | |
118 | if (mdev->n_output == 1) | |
119 | v4l2_subdev_call(to_outsd(mdev), core, s_power, 1); | |
120 | mutex_unlock(&mdev->mutex); | |
121 | } | |
122 | ||
123 | void mxr_output_put(struct mxr_device *mdev) | |
124 | { | |
125 | mutex_lock(&mdev->mutex); | |
126 | --mdev->n_output; | |
127 | mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_output); | |
128 | /* turn on auxiliary driver */ | |
129 | if (mdev->n_output == 0) | |
130 | v4l2_subdev_call(to_outsd(mdev), core, s_power, 0); | |
131 | WARN(mdev->n_output < 0, "negative number of output users (%d)\n", | |
132 | mdev->n_output); | |
133 | mutex_unlock(&mdev->mutex); | |
134 | } | |
135 | ||
136 | int mxr_power_get(struct mxr_device *mdev) | |
137 | { | |
138 | int ret = pm_runtime_get_sync(mdev->dev); | |
139 | ||
140 | /* returning 1 means that power is already enabled, | |
141 | * so zero success be returned */ | |
142 | if (IS_ERR_VALUE(ret)) | |
143 | return ret; | |
144 | return 0; | |
145 | } | |
146 | ||
147 | void mxr_power_put(struct mxr_device *mdev) | |
148 | { | |
149 | pm_runtime_put_sync(mdev->dev); | |
150 | } | |
151 | ||
152 | /* --------- RESOURCE MANAGEMENT -------------*/ | |
153 | ||
154 | static int __devinit mxr_acquire_plat_resources(struct mxr_device *mdev, | |
155 | struct platform_device *pdev) | |
156 | { | |
157 | struct resource *res; | |
158 | int ret; | |
159 | ||
160 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mxr"); | |
161 | if (res == NULL) { | |
162 | mxr_err(mdev, "get memory resource failed.\n"); | |
163 | ret = -ENXIO; | |
164 | goto fail; | |
165 | } | |
166 | ||
167 | mdev->res.mxr_regs = ioremap(res->start, resource_size(res)); | |
168 | if (mdev->res.mxr_regs == NULL) { | |
169 | mxr_err(mdev, "register mapping failed.\n"); | |
170 | ret = -ENXIO; | |
171 | goto fail; | |
172 | } | |
173 | ||
174 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vp"); | |
175 | if (res == NULL) { | |
176 | mxr_err(mdev, "get memory resource failed.\n"); | |
177 | ret = -ENXIO; | |
178 | goto fail_mxr_regs; | |
179 | } | |
180 | ||
181 | mdev->res.vp_regs = ioremap(res->start, resource_size(res)); | |
182 | if (mdev->res.vp_regs == NULL) { | |
183 | mxr_err(mdev, "register mapping failed.\n"); | |
184 | ret = -ENXIO; | |
185 | goto fail_mxr_regs; | |
186 | } | |
187 | ||
188 | res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "irq"); | |
189 | if (res == NULL) { | |
190 | mxr_err(mdev, "get interrupt resource failed.\n"); | |
191 | ret = -ENXIO; | |
192 | goto fail_vp_regs; | |
193 | } | |
194 | ||
195 | ret = request_irq(res->start, mxr_irq_handler, 0, "s5p-mixer", mdev); | |
196 | if (ret) { | |
197 | mxr_err(mdev, "request interrupt failed.\n"); | |
198 | goto fail_vp_regs; | |
199 | } | |
200 | mdev->res.irq = res->start; | |
201 | ||
202 | return 0; | |
203 | ||
204 | fail_vp_regs: | |
205 | iounmap(mdev->res.vp_regs); | |
206 | ||
207 | fail_mxr_regs: | |
208 | iounmap(mdev->res.mxr_regs); | |
209 | ||
210 | fail: | |
211 | return ret; | |
212 | } | |
213 | ||
214 | static void mxr_release_plat_resources(struct mxr_device *mdev) | |
215 | { | |
216 | free_irq(mdev->res.irq, mdev); | |
217 | iounmap(mdev->res.vp_regs); | |
218 | iounmap(mdev->res.mxr_regs); | |
219 | } | |
220 | ||
221 | static void mxr_release_clocks(struct mxr_device *mdev) | |
222 | { | |
223 | struct mxr_resources *res = &mdev->res; | |
224 | ||
225 | if (!IS_ERR_OR_NULL(res->sclk_dac)) | |
226 | clk_put(res->sclk_dac); | |
227 | if (!IS_ERR_OR_NULL(res->sclk_hdmi)) | |
228 | clk_put(res->sclk_hdmi); | |
229 | if (!IS_ERR_OR_NULL(res->sclk_mixer)) | |
230 | clk_put(res->sclk_mixer); | |
231 | if (!IS_ERR_OR_NULL(res->vp)) | |
232 | clk_put(res->vp); | |
233 | if (!IS_ERR_OR_NULL(res->mixer)) | |
234 | clk_put(res->mixer); | |
235 | } | |
236 | ||
237 | static int mxr_acquire_clocks(struct mxr_device *mdev) | |
238 | { | |
239 | struct mxr_resources *res = &mdev->res; | |
240 | struct device *dev = mdev->dev; | |
241 | ||
242 | res->mixer = clk_get(dev, "mixer"); | |
aeae3db1 | 243 | if (IS_ERR(res->mixer)) { |
fef1c8d0 TS |
244 | mxr_err(mdev, "failed to get clock 'mixer'\n"); |
245 | goto fail; | |
246 | } | |
247 | res->vp = clk_get(dev, "vp"); | |
aeae3db1 | 248 | if (IS_ERR(res->vp)) { |
fef1c8d0 TS |
249 | mxr_err(mdev, "failed to get clock 'vp'\n"); |
250 | goto fail; | |
251 | } | |
252 | res->sclk_mixer = clk_get(dev, "sclk_mixer"); | |
aeae3db1 | 253 | if (IS_ERR(res->sclk_mixer)) { |
fef1c8d0 TS |
254 | mxr_err(mdev, "failed to get clock 'sclk_mixer'\n"); |
255 | goto fail; | |
256 | } | |
257 | res->sclk_hdmi = clk_get(dev, "sclk_hdmi"); | |
aeae3db1 | 258 | if (IS_ERR(res->sclk_hdmi)) { |
fef1c8d0 TS |
259 | mxr_err(mdev, "failed to get clock 'sclk_hdmi'\n"); |
260 | goto fail; | |
261 | } | |
262 | res->sclk_dac = clk_get(dev, "sclk_dac"); | |
aeae3db1 | 263 | if (IS_ERR(res->sclk_dac)) { |
fef1c8d0 TS |
264 | mxr_err(mdev, "failed to get clock 'sclk_dac'\n"); |
265 | goto fail; | |
266 | } | |
267 | ||
268 | return 0; | |
269 | fail: | |
270 | mxr_release_clocks(mdev); | |
271 | return -ENODEV; | |
272 | } | |
273 | ||
274 | static int __devinit mxr_acquire_resources(struct mxr_device *mdev, | |
275 | struct platform_device *pdev) | |
276 | { | |
277 | int ret; | |
278 | ret = mxr_acquire_plat_resources(mdev, pdev); | |
279 | ||
280 | if (ret) | |
281 | goto fail; | |
282 | ||
283 | ret = mxr_acquire_clocks(mdev); | |
284 | if (ret) | |
285 | goto fail_plat; | |
286 | ||
287 | mxr_info(mdev, "resources acquired\n"); | |
288 | return 0; | |
289 | ||
290 | fail_plat: | |
291 | mxr_release_plat_resources(mdev); | |
292 | fail: | |
293 | mxr_err(mdev, "resources acquire failed\n"); | |
294 | return ret; | |
295 | } | |
296 | ||
297 | static void mxr_release_resources(struct mxr_device *mdev) | |
298 | { | |
299 | mxr_release_clocks(mdev); | |
300 | mxr_release_plat_resources(mdev); | |
301 | memset(&mdev->res, 0, sizeof mdev->res); | |
302 | } | |
303 | ||
304 | static void mxr_release_layers(struct mxr_device *mdev) | |
305 | { | |
306 | int i; | |
307 | ||
308 | for (i = 0; i < ARRAY_SIZE(mdev->layer); ++i) | |
309 | if (mdev->layer[i]) | |
310 | mxr_layer_release(mdev->layer[i]); | |
311 | } | |
312 | ||
313 | static int __devinit mxr_acquire_layers(struct mxr_device *mdev, | |
314 | struct mxr_platform_data *pdata) | |
315 | { | |
316 | mdev->layer[0] = mxr_graph_layer_create(mdev, 0); | |
317 | mdev->layer[1] = mxr_graph_layer_create(mdev, 1); | |
318 | mdev->layer[2] = mxr_vp_layer_create(mdev, 0); | |
319 | ||
320 | if (!mdev->layer[0] || !mdev->layer[1] || !mdev->layer[2]) { | |
321 | mxr_err(mdev, "failed to acquire layers\n"); | |
322 | goto fail; | |
323 | } | |
324 | ||
325 | return 0; | |
326 | ||
327 | fail: | |
328 | mxr_release_layers(mdev); | |
329 | return -ENODEV; | |
330 | } | |
331 | ||
332 | /* ---------- POWER MANAGEMENT ----------- */ | |
333 | ||
334 | static int mxr_runtime_resume(struct device *dev) | |
335 | { | |
336 | struct mxr_device *mdev = to_mdev(dev); | |
337 | struct mxr_resources *res = &mdev->res; | |
338 | ||
339 | mxr_dbg(mdev, "resume - start\n"); | |
340 | mutex_lock(&mdev->mutex); | |
341 | /* turn clocks on */ | |
342 | clk_enable(res->mixer); | |
343 | clk_enable(res->vp); | |
344 | clk_enable(res->sclk_mixer); | |
345 | /* apply default configuration */ | |
346 | mxr_reg_reset(mdev); | |
347 | mxr_dbg(mdev, "resume - finished\n"); | |
348 | ||
349 | mutex_unlock(&mdev->mutex); | |
350 | return 0; | |
351 | } | |
352 | ||
353 | static int mxr_runtime_suspend(struct device *dev) | |
354 | { | |
355 | struct mxr_device *mdev = to_mdev(dev); | |
356 | struct mxr_resources *res = &mdev->res; | |
357 | mxr_dbg(mdev, "suspend - start\n"); | |
358 | mutex_lock(&mdev->mutex); | |
359 | /* turn clocks off */ | |
360 | clk_disable(res->sclk_mixer); | |
361 | clk_disable(res->vp); | |
362 | clk_disable(res->mixer); | |
363 | mutex_unlock(&mdev->mutex); | |
364 | mxr_dbg(mdev, "suspend - finished\n"); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | static const struct dev_pm_ops mxr_pm_ops = { | |
369 | .runtime_suspend = mxr_runtime_suspend, | |
370 | .runtime_resume = mxr_runtime_resume, | |
371 | }; | |
372 | ||
373 | /* --------- DRIVER INITIALIZATION ---------- */ | |
374 | ||
375 | static int __devinit mxr_probe(struct platform_device *pdev) | |
376 | { | |
377 | struct device *dev = &pdev->dev; | |
378 | struct mxr_platform_data *pdata = dev->platform_data; | |
379 | struct mxr_device *mdev; | |
380 | int ret; | |
381 | ||
382 | /* mdev does not exist yet so no mxr_dbg is used */ | |
383 | dev_info(dev, "probe start\n"); | |
384 | ||
385 | mdev = kzalloc(sizeof *mdev, GFP_KERNEL); | |
386 | if (!mdev) { | |
970e85f8 | 387 | dev_err(dev, "not enough memory.\n"); |
fef1c8d0 TS |
388 | ret = -ENOMEM; |
389 | goto fail; | |
390 | } | |
391 | ||
392 | /* setup pointer to master device */ | |
393 | mdev->dev = dev; | |
394 | ||
395 | mutex_init(&mdev->mutex); | |
396 | spin_lock_init(&mdev->reg_slock); | |
397 | init_waitqueue_head(&mdev->event_queue); | |
398 | ||
399 | /* acquire resources: regs, irqs, clocks, regulators */ | |
400 | ret = mxr_acquire_resources(mdev, pdev); | |
401 | if (ret) | |
402 | goto fail_mem; | |
403 | ||
404 | /* configure resources for video output */ | |
405 | ret = mxr_acquire_video(mdev, mxr_output_conf, | |
406 | ARRAY_SIZE(mxr_output_conf)); | |
407 | if (ret) | |
408 | goto fail_resources; | |
409 | ||
410 | /* configure layers */ | |
411 | ret = mxr_acquire_layers(mdev, pdata); | |
412 | if (ret) | |
413 | goto fail_video; | |
414 | ||
415 | pm_runtime_enable(dev); | |
416 | ||
417 | mxr_info(mdev, "probe successful\n"); | |
418 | return 0; | |
419 | ||
420 | fail_video: | |
421 | mxr_release_video(mdev); | |
422 | ||
423 | fail_resources: | |
424 | mxr_release_resources(mdev); | |
425 | ||
426 | fail_mem: | |
427 | kfree(mdev); | |
428 | ||
429 | fail: | |
430 | dev_info(dev, "probe failed\n"); | |
431 | return ret; | |
432 | } | |
433 | ||
434 | static int __devexit mxr_remove(struct platform_device *pdev) | |
435 | { | |
436 | struct device *dev = &pdev->dev; | |
437 | struct mxr_device *mdev = to_mdev(dev); | |
438 | ||
439 | pm_runtime_disable(dev); | |
440 | ||
441 | mxr_release_layers(mdev); | |
442 | mxr_release_video(mdev); | |
443 | mxr_release_resources(mdev); | |
444 | ||
445 | kfree(mdev); | |
446 | ||
41292b16 | 447 | dev_info(dev, "remove successful\n"); |
fef1c8d0 TS |
448 | return 0; |
449 | } | |
450 | ||
451 | static struct platform_driver mxr_driver __refdata = { | |
452 | .probe = mxr_probe, | |
453 | .remove = __devexit_p(mxr_remove), | |
454 | .driver = { | |
455 | .name = MXR_DRIVER_NAME, | |
456 | .owner = THIS_MODULE, | |
457 | .pm = &mxr_pm_ops, | |
458 | } | |
459 | }; | |
460 | ||
461 | static int __init mxr_init(void) | |
462 | { | |
463 | int i, ret; | |
f5c99037 | 464 | static const char banner[] __initconst = |
fef1c8d0 TS |
465 | "Samsung TV Mixer driver, " |
466 | "(c) 2010-2011 Samsung Electronics Co., Ltd.\n"; | |
f5c99037 | 467 | pr_info("%s\n", banner); |
fef1c8d0 TS |
468 | |
469 | /* Loading auxiliary modules */ | |
470 | for (i = 0; i < ARRAY_SIZE(mxr_output_conf); ++i) | |
471 | request_module(mxr_output_conf[i].module_name); | |
472 | ||
473 | ret = platform_driver_register(&mxr_driver); | |
474 | if (ret != 0) { | |
f5c99037 | 475 | pr_err("s5p-tv: registration of MIXER driver failed\n"); |
fef1c8d0 TS |
476 | return -ENXIO; |
477 | } | |
478 | ||
479 | return 0; | |
480 | } | |
481 | module_init(mxr_init); | |
482 | ||
483 | static void __exit mxr_exit(void) | |
484 | { | |
485 | platform_driver_unregister(&mxr_driver); | |
486 | } | |
487 | module_exit(mxr_exit); |