diff options
Diffstat (limited to 'drivers/media/platform/s5p-tv/sdo_drv.c')
| -rw-r--r-- | drivers/media/platform/s5p-tv/sdo_drv.c | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/drivers/media/platform/s5p-tv/sdo_drv.c b/drivers/media/platform/s5p-tv/sdo_drv.c new file mode 100644 index 000000000000..ad68bbed014e --- /dev/null +++ b/drivers/media/platform/s5p-tv/sdo_drv.c @@ -0,0 +1,448 @@ +/* + * 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; + fmt->colorspace = V4L2_COLORSPACE_JPEG; + 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 = devm_kzalloc(&pdev->dev, 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->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (sdev->regs == NULL) { + dev_err(dev, "register mapping failed.\n"); + ret = -ENXIO; + goto fail; + } + + /* 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; + } + ret = devm_request_irq(&pdev->dev, res->start, sdo_irq_handler, 0, + "s5p-sdo", sdev); + if (ret) { + dev_err(dev, "request interrupt failed.\n"); + goto fail; + } + 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; + } + 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 = devm_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 = devm_regulator_get(dev, "vdet"); + if (IS_ERR_OR_NULL(sdev->vdet)) { + dev_err(dev, "failed to get regulator 'vdet'\n"); + goto fail_fout_vpll; + } + + /* 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_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: + 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); + clk_put(sdev->fout_vpll); + clk_put(sdev->dacphy); + clk_put(sdev->dac); + clk_put(sdev->sclk_dac); + + 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, + } +}; + +module_platform_driver(sdo_driver); |