2 * Samsung TV Mixer driver
4 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
6 * Tomasz Stanislawski, <t.stanislaws@samsung.com>
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
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
19 #include <linux/interrupt.h>
20 #include <linux/irq.h>
22 #include <linux/delay.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/clk.h>
26 MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>");
27 MODULE_DESCRIPTION("Samsung MIXER");
28 MODULE_LICENSE("GPL");
30 /* --------- DRIVER PARAMETERS ---------- */
32 static struct mxr_output_conf mxr_output_conf[] = {
34 .output_name = "S5P HDMI connector",
35 .module_name = "s5p-hdmi",
39 .output_name = "S5P SDO connector",
40 .module_name = "s5p-sdo",
45 void mxr_get_mbus_fmt(struct mxr_device *mdev,
46 struct v4l2_mbus_framefmt *mbus_fmt)
48 struct v4l2_subdev *sd;
49 struct v4l2_subdev_format fmt = {
50 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
54 mutex_lock(&mdev->mutex);
56 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
57 *mbus_fmt = fmt.format;
58 WARN(ret, "failed to get mbus_fmt for output %s\n", sd->name);
59 mutex_unlock(&mdev->mutex);
62 void mxr_streamer_get(struct mxr_device *mdev)
64 mutex_lock(&mdev->mutex);
66 mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_streamer);
67 if (mdev->n_streamer == 1) {
68 struct v4l2_subdev *sd = to_outsd(mdev);
69 struct v4l2_subdev_format fmt = {
70 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
72 struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
73 struct mxr_resources *res = &mdev->res;
76 if (to_output(mdev)->cookie == 0)
77 clk_set_parent(res->sclk_mixer, res->sclk_dac);
79 clk_set_parent(res->sclk_mixer, res->sclk_hdmi);
80 mxr_reg_s_output(mdev, to_output(mdev)->cookie);
82 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
83 WARN(ret, "failed to get mbus_fmt for output %s\n", sd->name);
84 ret = v4l2_subdev_call(sd, video, s_stream, 1);
85 WARN(ret, "starting stream failed for output %s\n", sd->name);
87 mxr_reg_set_mbus_fmt(mdev, mbus_fmt);
88 mxr_reg_streamon(mdev);
89 ret = mxr_reg_wait4vsync(mdev);
90 WARN(ret, "failed to get vsync (%d) from output\n", ret);
92 mutex_unlock(&mdev->mutex);
94 /* FIXME: what to do when streaming fails? */
97 void mxr_streamer_put(struct mxr_device *mdev)
99 mutex_lock(&mdev->mutex);
101 mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_streamer);
102 if (mdev->n_streamer == 0) {
104 struct v4l2_subdev *sd = to_outsd(mdev);
106 mxr_reg_streamoff(mdev);
107 /* vsync applies Mixer setup */
108 ret = mxr_reg_wait4vsync(mdev);
109 WARN(ret, "failed to get vsync (%d) from output\n", ret);
110 ret = v4l2_subdev_call(sd, video, s_stream, 0);
111 WARN(ret, "stopping stream failed for output %s\n", sd->name);
113 WARN(mdev->n_streamer < 0, "negative number of streamers (%d)\n",
115 mutex_unlock(&mdev->mutex);
119 void mxr_output_get(struct mxr_device *mdev)
121 mutex_lock(&mdev->mutex);
123 mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_output);
124 /* turn on auxiliary driver */
125 if (mdev->n_output == 1)
126 v4l2_subdev_call(to_outsd(mdev), core, s_power, 1);
127 mutex_unlock(&mdev->mutex);
130 void mxr_output_put(struct mxr_device *mdev)
132 mutex_lock(&mdev->mutex);
134 mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_output);
135 /* turn on auxiliary driver */
136 if (mdev->n_output == 0)
137 v4l2_subdev_call(to_outsd(mdev), core, s_power, 0);
138 WARN(mdev->n_output < 0, "negative number of output users (%d)\n",
140 mutex_unlock(&mdev->mutex);
143 int mxr_power_get(struct mxr_device *mdev)
145 int ret = pm_runtime_get_sync(mdev->dev);
147 /* returning 1 means that power is already enabled,
148 * so zero success be returned */
149 if (IS_ERR_VALUE(ret))
154 void mxr_power_put(struct mxr_device *mdev)
156 pm_runtime_put_sync(mdev->dev);
159 /* --------- RESOURCE MANAGEMENT -------------*/
161 static int mxr_acquire_plat_resources(struct mxr_device *mdev,
162 struct platform_device *pdev)
164 struct resource *res;
167 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mxr");
169 mxr_err(mdev, "get memory resource failed.\n");
174 mdev->res.mxr_regs = ioremap(res->start, resource_size(res));
175 if (mdev->res.mxr_regs == NULL) {
176 mxr_err(mdev, "register mapping failed.\n");
181 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vp");
183 mxr_err(mdev, "get memory resource failed.\n");
188 mdev->res.vp_regs = ioremap(res->start, resource_size(res));
189 if (mdev->res.vp_regs == NULL) {
190 mxr_err(mdev, "register mapping failed.\n");
195 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "irq");
197 mxr_err(mdev, "get interrupt resource failed.\n");
202 ret = request_irq(res->start, mxr_irq_handler, 0, "s5p-mixer", mdev);
204 mxr_err(mdev, "request interrupt failed.\n");
207 mdev->res.irq = res->start;
212 iounmap(mdev->res.vp_regs);
215 iounmap(mdev->res.mxr_regs);
221 static void mxr_resource_clear_clocks(struct mxr_resources *res)
223 res->mixer = ERR_PTR(-EINVAL);
224 res->vp = ERR_PTR(-EINVAL);
225 res->sclk_mixer = ERR_PTR(-EINVAL);
226 res->sclk_hdmi = ERR_PTR(-EINVAL);
227 res->sclk_dac = ERR_PTR(-EINVAL);
230 static void mxr_release_plat_resources(struct mxr_device *mdev)
232 free_irq(mdev->res.irq, mdev);
233 iounmap(mdev->res.vp_regs);
234 iounmap(mdev->res.mxr_regs);
237 static void mxr_release_clocks(struct mxr_device *mdev)
239 struct mxr_resources *res = &mdev->res;
241 if (!IS_ERR(res->sclk_dac))
242 clk_put(res->sclk_dac);
243 if (!IS_ERR(res->sclk_hdmi))
244 clk_put(res->sclk_hdmi);
245 if (!IS_ERR(res->sclk_mixer))
246 clk_put(res->sclk_mixer);
247 if (!IS_ERR(res->vp))
249 if (!IS_ERR(res->mixer))
253 static int mxr_acquire_clocks(struct mxr_device *mdev)
255 struct mxr_resources *res = &mdev->res;
256 struct device *dev = mdev->dev;
258 mxr_resource_clear_clocks(res);
260 res->mixer = clk_get(dev, "mixer");
261 if (IS_ERR(res->mixer)) {
262 mxr_err(mdev, "failed to get clock 'mixer'\n");
265 res->vp = clk_get(dev, "vp");
266 if (IS_ERR(res->vp)) {
267 mxr_err(mdev, "failed to get clock 'vp'\n");
270 res->sclk_mixer = clk_get(dev, "sclk_mixer");
271 if (IS_ERR(res->sclk_mixer)) {
272 mxr_err(mdev, "failed to get clock 'sclk_mixer'\n");
275 res->sclk_hdmi = clk_get(dev, "sclk_hdmi");
276 if (IS_ERR(res->sclk_hdmi)) {
277 mxr_err(mdev, "failed to get clock 'sclk_hdmi'\n");
280 res->sclk_dac = clk_get(dev, "sclk_dac");
281 if (IS_ERR(res->sclk_dac)) {
282 mxr_err(mdev, "failed to get clock 'sclk_dac'\n");
288 mxr_release_clocks(mdev);
292 static int mxr_acquire_resources(struct mxr_device *mdev,
293 struct platform_device *pdev)
296 ret = mxr_acquire_plat_resources(mdev, pdev);
301 ret = mxr_acquire_clocks(mdev);
305 mxr_info(mdev, "resources acquired\n");
309 mxr_release_plat_resources(mdev);
311 mxr_err(mdev, "resources acquire failed\n");
315 static void mxr_release_resources(struct mxr_device *mdev)
317 mxr_release_clocks(mdev);
318 mxr_release_plat_resources(mdev);
319 memset(&mdev->res, 0, sizeof(mdev->res));
320 mxr_resource_clear_clocks(&mdev->res);
323 static void mxr_release_layers(struct mxr_device *mdev)
327 for (i = 0; i < ARRAY_SIZE(mdev->layer); ++i)
329 mxr_layer_release(mdev->layer[i]);
332 static int mxr_acquire_layers(struct mxr_device *mdev,
333 struct mxr_platform_data *pdata)
335 mdev->layer[0] = mxr_graph_layer_create(mdev, 0);
336 mdev->layer[1] = mxr_graph_layer_create(mdev, 1);
337 mdev->layer[2] = mxr_vp_layer_create(mdev, 0);
339 if (!mdev->layer[0] || !mdev->layer[1] || !mdev->layer[2]) {
340 mxr_err(mdev, "failed to acquire layers\n");
347 mxr_release_layers(mdev);
351 /* ---------- POWER MANAGEMENT ----------- */
353 static int mxr_runtime_resume(struct device *dev)
355 struct mxr_device *mdev = to_mdev(dev);
356 struct mxr_resources *res = &mdev->res;
359 mxr_dbg(mdev, "resume - start\n");
360 mutex_lock(&mdev->mutex);
362 ret = clk_prepare_enable(res->mixer);
364 dev_err(mdev->dev, "clk_prepare_enable(mixer) failed\n");
367 ret = clk_prepare_enable(res->vp);
369 dev_err(mdev->dev, "clk_prepare_enable(vp) failed\n");
372 ret = clk_prepare_enable(res->sclk_mixer);
374 dev_err(mdev->dev, "clk_prepare_enable(sclk_mixer) failed\n");
377 /* apply default configuration */
379 mxr_dbg(mdev, "resume - finished\n");
381 mutex_unlock(&mdev->mutex);
385 clk_disable_unprepare(res->vp);
387 clk_disable_unprepare(res->mixer);
389 mutex_unlock(&mdev->mutex);
390 dev_err(mdev->dev, "resume failed\n");
394 static int mxr_runtime_suspend(struct device *dev)
396 struct mxr_device *mdev = to_mdev(dev);
397 struct mxr_resources *res = &mdev->res;
398 mxr_dbg(mdev, "suspend - start\n");
399 mutex_lock(&mdev->mutex);
400 /* turn clocks off */
401 clk_disable_unprepare(res->sclk_mixer);
402 clk_disable_unprepare(res->vp);
403 clk_disable_unprepare(res->mixer);
404 mutex_unlock(&mdev->mutex);
405 mxr_dbg(mdev, "suspend - finished\n");
409 static const struct dev_pm_ops mxr_pm_ops = {
410 .runtime_suspend = mxr_runtime_suspend,
411 .runtime_resume = mxr_runtime_resume,
414 /* --------- DRIVER INITIALIZATION ---------- */
416 static int mxr_probe(struct platform_device *pdev)
418 struct device *dev = &pdev->dev;
419 struct mxr_platform_data *pdata = dev->platform_data;
420 struct mxr_device *mdev;
423 /* mdev does not exist yet so no mxr_dbg is used */
424 dev_info(dev, "probe start\n");
426 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
428 dev_err(dev, "not enough memory.\n");
433 /* setup pointer to master device */
436 mutex_init(&mdev->mutex);
437 spin_lock_init(&mdev->reg_slock);
438 init_waitqueue_head(&mdev->event_queue);
440 /* acquire resources: regs, irqs, clocks, regulators */
441 ret = mxr_acquire_resources(mdev, pdev);
445 /* configure resources for video output */
446 ret = mxr_acquire_video(mdev, mxr_output_conf,
447 ARRAY_SIZE(mxr_output_conf));
451 /* configure layers */
452 ret = mxr_acquire_layers(mdev, pdata);
456 pm_runtime_enable(dev);
458 mxr_info(mdev, "probe successful\n");
462 mxr_release_video(mdev);
465 mxr_release_resources(mdev);
471 dev_info(dev, "probe failed\n");
475 static int mxr_remove(struct platform_device *pdev)
477 struct device *dev = &pdev->dev;
478 struct mxr_device *mdev = to_mdev(dev);
480 pm_runtime_disable(dev);
482 mxr_release_layers(mdev);
483 mxr_release_video(mdev);
484 mxr_release_resources(mdev);
488 dev_info(dev, "remove successful\n");
492 static struct platform_driver mxr_driver __refdata = {
494 .remove = mxr_remove,
496 .name = MXR_DRIVER_NAME,
501 static int __init mxr_init(void)
504 static const char banner[] __initconst =
505 "Samsung TV Mixer driver, "
506 "(c) 2010-2011 Samsung Electronics Co., Ltd.\n";
507 pr_info("%s\n", banner);
509 /* Loading auxiliary modules */
510 for (i = 0; i < ARRAY_SIZE(mxr_output_conf); ++i)
511 request_module(mxr_output_conf[i].module_name);
513 ret = platform_driver_register(&mxr_driver);
515 pr_err("s5p-tv: registration of MIXER driver failed\n");
521 module_init(mxr_init);
523 static void __exit mxr_exit(void)
525 platform_driver_unregister(&mxr_driver);
527 module_exit(mxr_exit);