--- /dev/null
+/*
+ * Samsung TV Mixer driver
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *
+ * Tomasz Stanislawski, <t.stanislaws@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundiation. either version 2 of the License,
+ * or (at your option) any later version
+ */
+
+#include "mixer.h"
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/fb.h>
+#include <linux/delay.h>
+#include <linux/pm_runtime.h>
+#include <linux/clk.h>
+
+MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>");
+MODULE_DESCRIPTION("Samsung MIXER");
+MODULE_LICENSE("GPL");
+
+/* --------- DRIVER PARAMETERS ---------- */
+
+static struct mxr_output_conf mxr_output_conf[] = {
+ {
+ .output_name = "S5P HDMI connector",
+ .module_name = "s5p-hdmi",
+ .cookie = 1,
+ },
+ {
+ .output_name = "S5P SDO connector",
+ .module_name = "s5p-sdo",
+ .cookie = 0,
+ },
+};
+
+void mxr_get_mbus_fmt(struct mxr_device *mdev,
+ struct v4l2_mbus_framefmt *mbus_fmt)
+{
+ struct v4l2_subdev *sd;
+ int ret;
+
+ mutex_lock(&mdev->mutex);
+ sd = to_outsd(mdev);
+ ret = v4l2_subdev_call(sd, video, g_mbus_fmt, mbus_fmt);
+ WARN(ret, "failed to get mbus_fmt for output %s\n", sd->name);
+ mutex_unlock(&mdev->mutex);
+}
+
+void mxr_streamer_get(struct mxr_device *mdev)
+{
+ mutex_lock(&mdev->mutex);
+ ++mdev->n_streamer;
+ mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_streamer);
+ if (mdev->n_streamer == 1) {
+ struct v4l2_subdev *sd = to_outsd(mdev);
+ struct v4l2_mbus_framefmt mbus_fmt;
+ struct mxr_resources *res = &mdev->res;
+ int ret;
+
+ if (to_output(mdev)->cookie == 0)
+ clk_set_parent(res->sclk_mixer, res->sclk_dac);
+ else
+ clk_set_parent(res->sclk_mixer, res->sclk_hdmi);
+ mxr_reg_s_output(mdev, to_output(mdev)->cookie);
+
+ ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mbus_fmt);
+ WARN(ret, "failed to get mbus_fmt for output %s\n", sd->name);
+ ret = v4l2_subdev_call(sd, video, s_stream, 1);
+ WARN(ret, "starting stream failed for output %s\n", sd->name);
+
+ mxr_reg_set_mbus_fmt(mdev, &mbus_fmt);
+ mxr_reg_streamon(mdev);
+ ret = mxr_reg_wait4vsync(mdev);
+ WARN(ret, "failed to get vsync (%d) from output\n", ret);
+ }
+ mutex_unlock(&mdev->mutex);
+ mxr_reg_dump(mdev);
+ /* FIXME: what to do when streaming fails? */
+}
+
+void mxr_streamer_put(struct mxr_device *mdev)
+{
+ mutex_lock(&mdev->mutex);
+ --mdev->n_streamer;
+ mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_streamer);
+ if (mdev->n_streamer == 0) {
+ int ret;
+ struct v4l2_subdev *sd = to_outsd(mdev);
+
+ mxr_reg_streamoff(mdev);
+ /* vsync applies Mixer setup */
+ ret = mxr_reg_wait4vsync(mdev);
+ WARN(ret, "failed to get vsync (%d) from output\n", ret);
+ ret = v4l2_subdev_call(sd, video, s_stream, 0);
+ WARN(ret, "stopping stream failed for output %s\n", sd->name);
+ }
+ WARN(mdev->n_streamer < 0, "negative number of streamers (%d)\n",
+ mdev->n_streamer);
+ mutex_unlock(&mdev->mutex);
+ mxr_reg_dump(mdev);
+}
+
+void mxr_output_get(struct mxr_device *mdev)
+{
+ mutex_lock(&mdev->mutex);
+ ++mdev->n_output;
+ mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_output);
+ /* turn on auxiliary driver */
+ if (mdev->n_output == 1)
+ v4l2_subdev_call(to_outsd(mdev), core, s_power, 1);
+ mutex_unlock(&mdev->mutex);
+}
+
+void mxr_output_put(struct mxr_device *mdev)
+{
+ mutex_lock(&mdev->mutex);
+ --mdev->n_output;
+ mxr_dbg(mdev, "%s(%d)\n", __func__, mdev->n_output);
+ /* turn on auxiliary driver */
+ if (mdev->n_output == 0)
+ v4l2_subdev_call(to_outsd(mdev), core, s_power, 0);
+ WARN(mdev->n_output < 0, "negative number of output users (%d)\n",
+ mdev->n_output);
+ mutex_unlock(&mdev->mutex);
+}
+
+int mxr_power_get(struct mxr_device *mdev)
+{
+ int ret = pm_runtime_get_sync(mdev->dev);
+
+ /* returning 1 means that power is already enabled,
+ * so zero success be returned */
+ if (IS_ERR_VALUE(ret))
+ return ret;
+ return 0;
+}
+
+void mxr_power_put(struct mxr_device *mdev)
+{
+ pm_runtime_put_sync(mdev->dev);
+}
+
+/* --------- RESOURCE MANAGEMENT -------------*/
+
+static int mxr_acquire_plat_resources(struct mxr_device *mdev,
+ struct platform_device *pdev)
+{
+ struct resource *res;
+ int ret;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mxr");
+ if (res == NULL) {
+ mxr_err(mdev, "get memory resource failed.\n");
+ ret = -ENXIO;
+ goto fail;
+ }
+
+ mdev->res.mxr_regs = ioremap(res->start, resource_size(res));
+ if (mdev->res.mxr_regs == NULL) {
+ mxr_err(mdev, "register mapping failed.\n");
+ ret = -ENXIO;
+ goto fail;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vp");
+ if (res == NULL) {
+ mxr_err(mdev, "get memory resource failed.\n");
+ ret = -ENXIO;
+ goto fail_mxr_regs;
+ }
+
+ mdev->res.vp_regs = ioremap(res->start, resource_size(res));
+ if (mdev->res.vp_regs == NULL) {
+ mxr_err(mdev, "register mapping failed.\n");
+ ret = -ENXIO;
+ goto fail_mxr_regs;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "irq");
+ if (res == NULL) {
+ mxr_err(mdev, "get interrupt resource failed.\n");
+ ret = -ENXIO;
+ goto fail_vp_regs;
+ }
+
+ ret = request_irq(res->start, mxr_irq_handler, 0, "s5p-mixer", mdev);
+ if (ret) {
+ mxr_err(mdev, "request interrupt failed.\n");
+ goto fail_vp_regs;
+ }
+ mdev->res.irq = res->start;
+
+ return 0;
+
+fail_vp_regs:
+ iounmap(mdev->res.vp_regs);
+
+fail_mxr_regs:
+ iounmap(mdev->res.mxr_regs);
+
+fail:
+ return ret;
+}
+
+static void mxr_resource_clear_clocks(struct mxr_resources *res)
+{
+ res->mixer = ERR_PTR(-EINVAL);
+ res->vp = ERR_PTR(-EINVAL);
+ res->sclk_mixer = ERR_PTR(-EINVAL);
+ res->sclk_hdmi = ERR_PTR(-EINVAL);
+ res->sclk_dac = ERR_PTR(-EINVAL);
+}
+
+static void mxr_release_plat_resources(struct mxr_device *mdev)
+{
+ free_irq(mdev->res.irq, mdev);
+ iounmap(mdev->res.vp_regs);
+ iounmap(mdev->res.mxr_regs);
+}
+
+static void mxr_release_clocks(struct mxr_device *mdev)
+{
+ struct mxr_resources *res = &mdev->res;
+
+ if (!IS_ERR(res->sclk_dac))
+ clk_put(res->sclk_dac);
+ if (!IS_ERR(res->sclk_hdmi))
+ clk_put(res->sclk_hdmi);
+ if (!IS_ERR(res->sclk_mixer))
+ clk_put(res->sclk_mixer);
+ if (!IS_ERR(res->vp))
+ clk_put(res->vp);
+ if (!IS_ERR(res->mixer))
+ clk_put(res->mixer);
+}
+
+static int mxr_acquire_clocks(struct mxr_device *mdev)
+{
+ struct mxr_resources *res = &mdev->res;
+ struct device *dev = mdev->dev;
+
+ mxr_resource_clear_clocks(res);
+
+ res->mixer = clk_get(dev, "mixer");
+ if (IS_ERR(res->mixer)) {
+ mxr_err(mdev, "failed to get clock 'mixer'\n");
+ goto fail;
+ }
+ res->vp = clk_get(dev, "vp");
+ if (IS_ERR(res->vp)) {
+ mxr_err(mdev, "failed to get clock 'vp'\n");
+ goto fail;
+ }
+ res->sclk_mixer = clk_get(dev, "sclk_mixer");
+ if (IS_ERR(res->sclk_mixer)) {
+ mxr_err(mdev, "failed to get clock 'sclk_mixer'\n");
+ goto fail;
+ }
+ res->sclk_hdmi = clk_get(dev, "sclk_hdmi");
+ if (IS_ERR(res->sclk_hdmi)) {
+ mxr_err(mdev, "failed to get clock 'sclk_hdmi'\n");
+ goto fail;
+ }
+ res->sclk_dac = clk_get(dev, "sclk_dac");
+ if (IS_ERR(res->sclk_dac)) {
+ mxr_err(mdev, "failed to get clock 'sclk_dac'\n");
+ goto fail;
+ }
+
+ return 0;
+fail:
+ mxr_release_clocks(mdev);
+ return -ENODEV;
+}
+
+static int mxr_acquire_resources(struct mxr_device *mdev,
+ struct platform_device *pdev)
+{
+ int ret;
+ ret = mxr_acquire_plat_resources(mdev, pdev);
+
+ if (ret)
+ goto fail;
+
+ ret = mxr_acquire_clocks(mdev);
+ if (ret)
+ goto fail_plat;
+
+ mxr_info(mdev, "resources acquired\n");
+ return 0;
+
+fail_plat:
+ mxr_release_plat_resources(mdev);
+fail:
+ mxr_err(mdev, "resources acquire failed\n");
+ return ret;
+}
+
+static void mxr_release_resources(struct mxr_device *mdev)
+{
+ mxr_release_clocks(mdev);
+ mxr_release_plat_resources(mdev);
+ memset(&mdev->res, 0, sizeof(mdev->res));
+ mxr_resource_clear_clocks(&mdev->res);
+}
+
+static void mxr_release_layers(struct mxr_device *mdev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mdev->layer); ++i)
+ if (mdev->layer[i])
+ mxr_layer_release(mdev->layer[i]);
+}
+
+static int mxr_acquire_layers(struct mxr_device *mdev,
+ struct mxr_platform_data *pdata)
+{
+ mdev->layer[0] = mxr_graph_layer_create(mdev, 0);
+ mdev->layer[1] = mxr_graph_layer_create(mdev, 1);
+ mdev->layer[2] = mxr_vp_layer_create(mdev, 0);
+
+ if (!mdev->layer[0] || !mdev->layer[1] || !mdev->layer[2]) {
+ mxr_err(mdev, "failed to acquire layers\n");
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ mxr_release_layers(mdev);
+ return -ENODEV;
+}
+
+/* ---------- POWER MANAGEMENT ----------- */
+
+static int mxr_runtime_resume(struct device *dev)
+{
+ struct mxr_device *mdev = to_mdev(dev);
+ struct mxr_resources *res = &mdev->res;
+ int ret;
+
+ mxr_dbg(mdev, "resume - start\n");
+ mutex_lock(&mdev->mutex);
+ /* turn clocks on */
+ ret = clk_prepare_enable(res->mixer);
+ if (ret < 0) {
+ dev_err(mdev->dev, "clk_prepare_enable(mixer) failed\n");
+ goto fail;
+ }
+ ret = clk_prepare_enable(res->vp);
+ if (ret < 0) {
+ dev_err(mdev->dev, "clk_prepare_enable(vp) failed\n");
+ goto fail_mixer;
+ }
+ ret = clk_prepare_enable(res->sclk_mixer);
+ if (ret < 0) {
+ dev_err(mdev->dev, "clk_prepare_enable(sclk_mixer) failed\n");
+ goto fail_vp;
+ }
+ /* apply default configuration */
+ mxr_reg_reset(mdev);
+ mxr_dbg(mdev, "resume - finished\n");
+
+ mutex_unlock(&mdev->mutex);
+ return 0;
+
+fail_vp:
+ clk_disable_unprepare(res->vp);
+fail_mixer:
+ clk_disable_unprepare(res->mixer);
+fail:
+ mutex_unlock(&mdev->mutex);
+ dev_err(mdev->dev, "resume failed\n");
+ return ret;
+}
+
+static int mxr_runtime_suspend(struct device *dev)
+{
+ struct mxr_device *mdev = to_mdev(dev);
+ struct mxr_resources *res = &mdev->res;
+ mxr_dbg(mdev, "suspend - start\n");
+ mutex_lock(&mdev->mutex);
+ /* turn clocks off */
+ clk_disable_unprepare(res->sclk_mixer);
+ clk_disable_unprepare(res->vp);
+ clk_disable_unprepare(res->mixer);
+ mutex_unlock(&mdev->mutex);
+ mxr_dbg(mdev, "suspend - finished\n");
+ return 0;
+}
+
+static const struct dev_pm_ops mxr_pm_ops = {
+ .runtime_suspend = mxr_runtime_suspend,
+ .runtime_resume = mxr_runtime_resume,
+};
+
+/* --------- DRIVER INITIALIZATION ---------- */
+
+static int mxr_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mxr_platform_data *pdata = dev->platform_data;
+ struct mxr_device *mdev;
+ int ret;
+
+ /* mdev does not exist yet so no mxr_dbg is used */
+ dev_info(dev, "probe start\n");
+
+ mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
+ if (!mdev) {
+ dev_err(dev, "not enough memory.\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ /* setup pointer to master device */
+ mdev->dev = dev;
+
+ mutex_init(&mdev->mutex);
+ spin_lock_init(&mdev->reg_slock);
+ init_waitqueue_head(&mdev->event_queue);
+
+ /* acquire resources: regs, irqs, clocks, regulators */
+ ret = mxr_acquire_resources(mdev, pdev);
+ if (ret)
+ goto fail_mem;
+
+ /* configure resources for video output */
+ ret = mxr_acquire_video(mdev, mxr_output_conf,
+ ARRAY_SIZE(mxr_output_conf));
+ if (ret)
+ goto fail_resources;
+
+ /* configure layers */
+ ret = mxr_acquire_layers(mdev, pdata);
+ if (ret)
+ goto fail_video;
+
+ pm_runtime_enable(dev);
+
+ mxr_info(mdev, "probe successful\n");
+ return 0;
+
+fail_video:
+ mxr_release_video(mdev);
+
+fail_resources:
+ mxr_release_resources(mdev);
+
+fail_mem:
+ kfree(mdev);
+
+fail:
+ dev_info(dev, "probe failed\n");
+ return ret;
+}
+
+static int mxr_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mxr_device *mdev = to_mdev(dev);
+
+ pm_runtime_disable(dev);
+
+ mxr_release_layers(mdev);
+ mxr_release_video(mdev);
+ mxr_release_resources(mdev);
+
+ kfree(mdev);
+
+ dev_info(dev, "remove successful\n");
+ return 0;
+}
+
+static struct platform_driver mxr_driver __refdata = {
+ .probe = mxr_probe,
+ .remove = mxr_remove,
+ .driver = {
+ .name = MXR_DRIVER_NAME,
+ .pm = &mxr_pm_ops,
+ }
+};
+
+static int __init mxr_init(void)
+{
+ int i, ret;
+ static const char banner[] __initconst =
+ "Samsung TV Mixer driver, "
+ "(c) 2010-2011 Samsung Electronics Co., Ltd.\n";
+ pr_info("%s\n", banner);
+
+ /* Loading auxiliary modules */
+ for (i = 0; i < ARRAY_SIZE(mxr_output_conf); ++i)
+ request_module(mxr_output_conf[i].module_name);
+
+ ret = platform_driver_register(&mxr_driver);
+ if (ret != 0) {
+ pr_err("s5p-tv: registration of MIXER driver failed\n");
+ return -ENXIO;
+ }
+
+ return 0;
+}
+module_init(mxr_init);
+
+static void __exit mxr_exit(void)
+{
+ platform_driver_unregister(&mxr_driver);
+}
+module_exit(mxr_exit);
Code Review / kvmfornfv.git / blobdiff