--- /dev/null
+/*
+ * Samsung Standard Definition Output (SDO) 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 <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-subdev.h>
+
+#include "regs-sdo.h"
+
+MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>");
+MODULE_DESCRIPTION("Samsung Standard Definition Output (SDO)");
+MODULE_LICENSE("GPL");
+
+#define SDO_DEFAULT_STD V4L2_STD_PAL
+
+struct sdo_format {
+ v4l2_std_id id;
+ /* all modes are 720 pixels wide */
+ unsigned int height;
+ unsigned int cookie;
+};
+
+struct sdo_device {
+ /** pointer to device parent */
+ struct device *dev;
+ /** base address of SDO registers */
+ void __iomem *regs;
+ /** SDO interrupt */
+ unsigned int irq;
+ /** DAC source clock */
+ struct clk *sclk_dac;
+ /** DAC clock */
+ struct clk *dac;
+ /** DAC physical interface */
+ struct clk *dacphy;
+ /** clock for control of VPLL */
+ struct clk *fout_vpll;
+ /** regulator for SDO IP power */
+ struct regulator *vdac;
+ /** regulator for SDO plug detection */
+ struct regulator *vdet;
+ /** subdev used as device interface */
+ struct v4l2_subdev sd;
+ /** current format */
+ const struct sdo_format *fmt;
+};
+
+static inline struct sdo_device *sd_to_sdev(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct sdo_device, sd);
+}
+
+static inline
+void sdo_write_mask(struct sdo_device *sdev, u32 reg_id, u32 value, u32 mask)
+{
+ u32 old = readl(sdev->regs + reg_id);
+ value = (value & mask) | (old & ~mask);
+ writel(value, sdev->regs + reg_id);
+}
+
+static inline
+void sdo_write(struct sdo_device *sdev, u32 reg_id, u32 value)
+{
+ writel(value, sdev->regs + reg_id);
+}
+
+static inline
+u32 sdo_read(struct sdo_device *sdev, u32 reg_id)
+{
+ return readl(sdev->regs + reg_id);
+}
+
+static irqreturn_t sdo_irq_handler(int irq, void *dev_data)
+{
+ struct sdo_device *sdev = dev_data;
+
+ /* clear interrupt */
+ sdo_write_mask(sdev, SDO_IRQ, ~0, SDO_VSYNC_IRQ_PEND);
+ return IRQ_HANDLED;
+}
+
+static void sdo_reg_debug(struct sdo_device *sdev)
+{
+#define DBGREG(reg_id) \
+ dev_info(sdev->dev, #reg_id " = %08x\n", \
+ sdo_read(sdev, reg_id))
+
+ DBGREG(SDO_CLKCON);
+ DBGREG(SDO_CONFIG);
+ DBGREG(SDO_VBI);
+ DBGREG(SDO_DAC);
+ DBGREG(SDO_IRQ);
+ DBGREG(SDO_IRQMASK);
+ DBGREG(SDO_VERSION);
+}
+
+static const struct sdo_format sdo_format[] = {
+ { V4L2_STD_PAL_N, .height = 576, .cookie = SDO_PAL_N },
+ { V4L2_STD_PAL_Nc, .height = 576, .cookie = SDO_PAL_NC },
+ { V4L2_STD_PAL_M, .height = 480, .cookie = SDO_PAL_M },
+ { V4L2_STD_PAL_60, .height = 480, .cookie = SDO_PAL_60 },
+ { V4L2_STD_NTSC_443, .height = 480, .cookie = SDO_NTSC_443 },
+ { V4L2_STD_PAL, .height = 576, .cookie = SDO_PAL_BGHID },
+ { V4L2_STD_NTSC_M, .height = 480, .cookie = SDO_NTSC_M },
+};
+
+static const struct sdo_format *sdo_find_format(v4l2_std_id id)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(sdo_format); ++i)
+ if (sdo_format[i].id & id)
+ return &sdo_format[i];
+ return NULL;
+}
+
+static int sdo_g_tvnorms_output(struct v4l2_subdev *sd, v4l2_std_id *std)
+{
+ *std = V4L2_STD_NTSC_M | V4L2_STD_PAL_M | V4L2_STD_PAL |
+ V4L2_STD_PAL_N | V4L2_STD_PAL_Nc |
+ V4L2_STD_NTSC_443 | V4L2_STD_PAL_60;
+ return 0;
+}
+
+static int sdo_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
+{
+ struct sdo_device *sdev = sd_to_sdev(sd);
+ const struct sdo_format *fmt;
+ fmt = sdo_find_format(std);
+ if (fmt == NULL)
+ return -EINVAL;
+ sdev->fmt = fmt;
+ return 0;
+}
+
+static int sdo_g_std_output(struct v4l2_subdev *sd, v4l2_std_id *std)
+{
+ *std = sd_to_sdev(sd)->fmt->id;
+ return 0;
+}
+
+static int sdo_g_mbus_fmt(struct v4l2_subdev *sd,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ struct sdo_device *sdev = sd_to_sdev(sd);
+
+ if (!sdev->fmt)
+ return -ENXIO;
+ /* all modes are 720 pixels wide */
+ fmt->width = 720;
+ fmt->height = sdev->fmt->height;
+ fmt->code = V4L2_MBUS_FMT_FIXED;
+ fmt->field = V4L2_FIELD_INTERLACED;
+ return 0;
+}
+
+static int sdo_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct sdo_device *sdev = sd_to_sdev(sd);
+ struct device *dev = sdev->dev;
+ int ret;
+
+ dev_info(dev, "sdo_s_power(%d)\n", on);
+
+ if (on)
+ ret = pm_runtime_get_sync(dev);
+ else
+ ret = pm_runtime_put_sync(dev);
+
+ /* only values < 0 indicate errors */
+ return IS_ERR_VALUE(ret) ? ret : 0;
+}
+
+static int sdo_streamon(struct sdo_device *sdev)
+{
+ /* set proper clock for Timing Generator */
+ clk_set_rate(sdev->fout_vpll, 54000000);
+ dev_info(sdev->dev, "fout_vpll.rate = %lu\n",
+ clk_get_rate(sdev->fout_vpll));
+ /* enable clock in SDO */
+ sdo_write_mask(sdev, SDO_CLKCON, ~0, SDO_TVOUT_CLOCK_ON);
+ clk_enable(sdev->dacphy);
+ /* enable DAC */
+ sdo_write_mask(sdev, SDO_DAC, ~0, SDO_POWER_ON_DAC);
+ sdo_reg_debug(sdev);
+ return 0;
+}
+
+static int sdo_streamoff(struct sdo_device *sdev)
+{
+ int tries;
+
+ sdo_write_mask(sdev, SDO_DAC, 0, SDO_POWER_ON_DAC);
+ clk_disable(sdev->dacphy);
+ sdo_write_mask(sdev, SDO_CLKCON, 0, SDO_TVOUT_CLOCK_ON);
+ for (tries = 100; tries; --tries) {
+ if (sdo_read(sdev, SDO_CLKCON) & SDO_TVOUT_CLOCK_READY)
+ break;
+ mdelay(1);
+ }
+ if (tries == 0)
+ dev_err(sdev->dev, "failed to stop streaming\n");
+ return tries ? 0 : -EIO;
+}
+
+static int sdo_s_stream(struct v4l2_subdev *sd, int on)
+{
+ struct sdo_device *sdev = sd_to_sdev(sd);
+ return on ? sdo_streamon(sdev) : sdo_streamoff(sdev);
+}
+
+static const struct v4l2_subdev_core_ops sdo_sd_core_ops = {
+ .s_power = sdo_s_power,
+};
+
+static const struct v4l2_subdev_video_ops sdo_sd_video_ops = {
+ .s_std_output = sdo_s_std_output,
+ .g_std_output = sdo_g_std_output,
+ .g_tvnorms_output = sdo_g_tvnorms_output,
+ .g_mbus_fmt = sdo_g_mbus_fmt,
+ .s_stream = sdo_s_stream,
+};
+
+static const struct v4l2_subdev_ops sdo_sd_ops = {
+ .core = &sdo_sd_core_ops,
+ .video = &sdo_sd_video_ops,
+};
+
+static int sdo_runtime_suspend(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct sdo_device *sdev = sd_to_sdev(sd);
+
+ dev_info(dev, "suspend\n");
+ regulator_disable(sdev->vdet);
+ regulator_disable(sdev->vdac);
+ clk_disable(sdev->sclk_dac);
+ return 0;
+}
+
+static int sdo_runtime_resume(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct sdo_device *sdev = sd_to_sdev(sd);
+
+ dev_info(dev, "resume\n");
+ clk_enable(sdev->sclk_dac);
+ regulator_enable(sdev->vdac);
+ regulator_enable(sdev->vdet);
+
+ /* software reset */
+ sdo_write_mask(sdev, SDO_CLKCON, ~0, SDO_TVOUT_SW_RESET);
+ mdelay(10);
+ sdo_write_mask(sdev, SDO_CLKCON, 0, SDO_TVOUT_SW_RESET);
+
+ /* setting TV mode */
+ sdo_write_mask(sdev, SDO_CONFIG, sdev->fmt->cookie, SDO_STANDARD_MASK);
+ /* XXX: forcing interlaced mode using undocumented bit */
+ sdo_write_mask(sdev, SDO_CONFIG, 0, SDO_PROGRESSIVE);
+ /* turn all VBI off */
+ sdo_write_mask(sdev, SDO_VBI, 0, SDO_CVBS_WSS_INS |
+ SDO_CVBS_CLOSED_CAPTION_MASK);
+ /* turn all post processing off */
+ sdo_write_mask(sdev, SDO_CCCON, ~0, SDO_COMPENSATION_BHS_ADJ_OFF |
+ SDO_COMPENSATION_CVBS_COMP_OFF);
+ sdo_reg_debug(sdev);
+ return 0;
+}
+
+static const struct dev_pm_ops sdo_pm_ops = {
+ .runtime_suspend = sdo_runtime_suspend,
+ .runtime_resume = sdo_runtime_resume,
+};
+
+static int __devinit sdo_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sdo_device *sdev;
+ struct resource *res;
+ int ret = 0;
+ struct clk *sclk_vpll;
+
+ dev_info(dev, "probe start\n");
+ sdev = kzalloc(sizeof *sdev, GFP_KERNEL);
+ if (!sdev) {
+ dev_err(dev, "not enough memory.\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+ sdev->dev = dev;
+
+ /* mapping registers */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(dev, "get memory resource failed.\n");
+ ret = -ENXIO;
+ goto fail_sdev;
+ }
+
+ sdev->regs = ioremap(res->start, resource_size(res));
+ if (sdev->regs == NULL) {
+ dev_err(dev, "register mapping failed.\n");
+ ret = -ENXIO;
+ goto fail_sdev;
+ }
+
+ /* acquiring interrupt */
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (res == NULL) {
+ dev_err(dev, "get interrupt resource failed.\n");
+ ret = -ENXIO;
+ goto fail_regs;
+ }
+ ret = request_irq(res->start, sdo_irq_handler, 0, "s5p-sdo", sdev);
+ if (ret) {
+ dev_err(dev, "request interrupt failed.\n");
+ goto fail_regs;
+ }
+ sdev->irq = res->start;
+
+ /* acquire clocks */
+ sdev->sclk_dac = clk_get(dev, "sclk_dac");
+ if (IS_ERR_OR_NULL(sdev->sclk_dac)) {
+ dev_err(dev, "failed to get clock 'sclk_dac'\n");
+ ret = -ENXIO;
+ goto fail_irq;
+ }
+ sdev->dac = clk_get(dev, "dac");
+ if (IS_ERR_OR_NULL(sdev->dac)) {
+ dev_err(dev, "failed to get clock 'dac'\n");
+ ret = -ENXIO;
+ goto fail_sclk_dac;
+ }
+ sdev->dacphy = clk_get(dev, "dacphy");
+ if (IS_ERR_OR_NULL(sdev->dacphy)) {
+ dev_err(dev, "failed to get clock 'dacphy'\n");
+ ret = -ENXIO;
+ goto fail_dac;
+ }
+ sclk_vpll = clk_get(dev, "sclk_vpll");
+ if (IS_ERR_OR_NULL(sclk_vpll)) {
+ dev_err(dev, "failed to get clock 'sclk_vpll'\n");
+ ret = -ENXIO;
+ goto fail_dacphy;
+ }
+ clk_set_parent(sdev->sclk_dac, sclk_vpll);
+ clk_put(sclk_vpll);
+ sdev->fout_vpll = clk_get(dev, "fout_vpll");
+ if (IS_ERR_OR_NULL(sdev->fout_vpll)) {
+ dev_err(dev, "failed to get clock 'fout_vpll'\n");
+ goto fail_dacphy;
+ }
+ dev_info(dev, "fout_vpll.rate = %lu\n", clk_get_rate(sclk_vpll));
+
+ /* acquire regulator */
+ sdev->vdac = regulator_get(dev, "vdd33a_dac");
+ if (IS_ERR_OR_NULL(sdev->vdac)) {
+ dev_err(dev, "failed to get regulator 'vdac'\n");
+ goto fail_fout_vpll;
+ }
+ sdev->vdet = regulator_get(dev, "vdet");
+ if (IS_ERR_OR_NULL(sdev->vdet)) {
+ dev_err(dev, "failed to get regulator 'vdet'\n");
+ goto fail_vdac;
+ }
+
+ /* enable gate for dac clock, because mixer uses it */
+ clk_enable(sdev->dac);
+
+ /* configure power management */
+ pm_runtime_enable(dev);
+
+ /* configuration of interface subdevice */
+ v4l2_subdev_init(&sdev->sd, &sdo_sd_ops);
+ sdev->sd.owner = THIS_MODULE;
+ strlcpy(sdev->sd.name, "s5p-sdo", sizeof sdev->sd.name);
+
+ /* set default format */
+ sdev->fmt = sdo_find_format(SDO_DEFAULT_STD);
+ BUG_ON(sdev->fmt == NULL);
+
+ /* keeping subdev in device's private for use by other drivers */
+ dev_set_drvdata(dev, &sdev->sd);
+
+ dev_info(dev, "probe succeeded\n");
+ return 0;
+
+fail_vdac:
+ regulator_put(sdev->vdac);
+fail_fout_vpll:
+ clk_put(sdev->fout_vpll);
+fail_dacphy:
+ clk_put(sdev->dacphy);
+fail_dac:
+ clk_put(sdev->dac);
+fail_sclk_dac:
+ clk_put(sdev->sclk_dac);
+fail_irq:
+ free_irq(sdev->irq, sdev);
+fail_regs:
+ iounmap(sdev->regs);
+fail_sdev:
+ kfree(sdev);
+fail:
+ dev_info(dev, "probe failed\n");
+ return ret;
+}
+
+static int __devexit sdo_remove(struct platform_device *pdev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(&pdev->dev);
+ struct sdo_device *sdev = sd_to_sdev(sd);
+
+ pm_runtime_disable(&pdev->dev);
+ clk_disable(sdev->dac);
+ regulator_put(sdev->vdet);
+ regulator_put(sdev->vdac);
+ clk_put(sdev->fout_vpll);
+ clk_put(sdev->dacphy);
+ clk_put(sdev->dac);
+ clk_put(sdev->sclk_dac);
+ free_irq(sdev->irq, sdev);
+ iounmap(sdev->regs);
+ kfree(sdev);
+
+ dev_info(&pdev->dev, "remove successful\n");
+ return 0;
+}
+
+static struct platform_driver sdo_driver __refdata = {
+ .probe = sdo_probe,
+ .remove = __devexit_p(sdo_remove),
+ .driver = {
+ .name = "s5p-sdo",
+ .owner = THIS_MODULE,
+ .pm = &sdo_pm_ops,
+ }
+};
+
+static int __init sdo_init(void)
+{
+ int ret;
+ static const char banner[] __initdata = KERN_INFO \
+ "Samsung Standard Definition Output (SDO) driver, "
+ "(c) 2010-2011 Samsung Electronics Co., Ltd.\n";
+ printk(banner);
+
+ ret = platform_driver_register(&sdo_driver);
+ if (ret)
+ printk(KERN_ERR "SDO platform driver register failed\n");
+
+ return ret;
+}
+module_init(sdo_init);
+
+static void __exit sdo_exit(void)
+{
+ platform_driver_unregister(&sdo_driver);
+}
+module_exit(sdo_exit);
projects / linux-beck.git / commitdiff