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00d98c1bd6
devm_regulator_get() is a device managed function and makes the exit code a bit simpler and cleaner. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
449 lines
11 KiB
C
449 lines
11 KiB
C
/*
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* Samsung Standard Definition Output (SDO) driver
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*
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* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
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*
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* Tomasz Stanislawski, <t.stanislaws@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundiation. either version 2 of the License,
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* or (at your option) any later version
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <media/v4l2-subdev.h>
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#include "regs-sdo.h"
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MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>");
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MODULE_DESCRIPTION("Samsung Standard Definition Output (SDO)");
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MODULE_LICENSE("GPL");
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#define SDO_DEFAULT_STD V4L2_STD_PAL
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struct sdo_format {
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v4l2_std_id id;
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/* all modes are 720 pixels wide */
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unsigned int height;
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unsigned int cookie;
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};
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struct sdo_device {
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/** pointer to device parent */
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struct device *dev;
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/** base address of SDO registers */
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void __iomem *regs;
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/** SDO interrupt */
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unsigned int irq;
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/** DAC source clock */
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struct clk *sclk_dac;
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/** DAC clock */
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struct clk *dac;
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/** DAC physical interface */
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struct clk *dacphy;
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/** clock for control of VPLL */
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struct clk *fout_vpll;
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/** regulator for SDO IP power */
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struct regulator *vdac;
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/** regulator for SDO plug detection */
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struct regulator *vdet;
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/** subdev used as device interface */
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struct v4l2_subdev sd;
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/** current format */
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const struct sdo_format *fmt;
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};
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static inline struct sdo_device *sd_to_sdev(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct sdo_device, sd);
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}
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static inline
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void sdo_write_mask(struct sdo_device *sdev, u32 reg_id, u32 value, u32 mask)
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{
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u32 old = readl(sdev->regs + reg_id);
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value = (value & mask) | (old & ~mask);
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writel(value, sdev->regs + reg_id);
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}
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static inline
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void sdo_write(struct sdo_device *sdev, u32 reg_id, u32 value)
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{
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writel(value, sdev->regs + reg_id);
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}
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static inline
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u32 sdo_read(struct sdo_device *sdev, u32 reg_id)
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{
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return readl(sdev->regs + reg_id);
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}
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static irqreturn_t sdo_irq_handler(int irq, void *dev_data)
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{
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struct sdo_device *sdev = dev_data;
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/* clear interrupt */
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sdo_write_mask(sdev, SDO_IRQ, ~0, SDO_VSYNC_IRQ_PEND);
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return IRQ_HANDLED;
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}
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static void sdo_reg_debug(struct sdo_device *sdev)
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{
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#define DBGREG(reg_id) \
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dev_info(sdev->dev, #reg_id " = %08x\n", \
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sdo_read(sdev, reg_id))
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DBGREG(SDO_CLKCON);
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DBGREG(SDO_CONFIG);
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DBGREG(SDO_VBI);
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DBGREG(SDO_DAC);
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DBGREG(SDO_IRQ);
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DBGREG(SDO_IRQMASK);
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DBGREG(SDO_VERSION);
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}
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static const struct sdo_format sdo_format[] = {
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{ V4L2_STD_PAL_N, .height = 576, .cookie = SDO_PAL_N },
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{ V4L2_STD_PAL_Nc, .height = 576, .cookie = SDO_PAL_NC },
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{ V4L2_STD_PAL_M, .height = 480, .cookie = SDO_PAL_M },
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{ V4L2_STD_PAL_60, .height = 480, .cookie = SDO_PAL_60 },
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{ V4L2_STD_NTSC_443, .height = 480, .cookie = SDO_NTSC_443 },
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{ V4L2_STD_PAL, .height = 576, .cookie = SDO_PAL_BGHID },
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{ V4L2_STD_NTSC_M, .height = 480, .cookie = SDO_NTSC_M },
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};
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static const struct sdo_format *sdo_find_format(v4l2_std_id id)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(sdo_format); ++i)
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if (sdo_format[i].id & id)
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return &sdo_format[i];
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return NULL;
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}
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static int sdo_g_tvnorms_output(struct v4l2_subdev *sd, v4l2_std_id *std)
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{
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*std = V4L2_STD_NTSC_M | V4L2_STD_PAL_M | V4L2_STD_PAL |
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V4L2_STD_PAL_N | V4L2_STD_PAL_Nc |
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V4L2_STD_NTSC_443 | V4L2_STD_PAL_60;
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return 0;
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}
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static int sdo_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
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{
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struct sdo_device *sdev = sd_to_sdev(sd);
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const struct sdo_format *fmt;
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fmt = sdo_find_format(std);
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if (fmt == NULL)
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return -EINVAL;
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sdev->fmt = fmt;
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return 0;
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}
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static int sdo_g_std_output(struct v4l2_subdev *sd, v4l2_std_id *std)
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{
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*std = sd_to_sdev(sd)->fmt->id;
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return 0;
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}
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static int sdo_g_mbus_fmt(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *fmt)
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{
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struct sdo_device *sdev = sd_to_sdev(sd);
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if (!sdev->fmt)
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return -ENXIO;
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/* all modes are 720 pixels wide */
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fmt->width = 720;
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fmt->height = sdev->fmt->height;
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fmt->code = V4L2_MBUS_FMT_FIXED;
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fmt->field = V4L2_FIELD_INTERLACED;
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fmt->colorspace = V4L2_COLORSPACE_JPEG;
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return 0;
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}
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static int sdo_s_power(struct v4l2_subdev *sd, int on)
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{
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struct sdo_device *sdev = sd_to_sdev(sd);
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struct device *dev = sdev->dev;
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int ret;
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dev_info(dev, "sdo_s_power(%d)\n", on);
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if (on)
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ret = pm_runtime_get_sync(dev);
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else
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ret = pm_runtime_put_sync(dev);
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/* only values < 0 indicate errors */
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return IS_ERR_VALUE(ret) ? ret : 0;
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}
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static int sdo_streamon(struct sdo_device *sdev)
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{
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/* set proper clock for Timing Generator */
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clk_set_rate(sdev->fout_vpll, 54000000);
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dev_info(sdev->dev, "fout_vpll.rate = %lu\n",
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clk_get_rate(sdev->fout_vpll));
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/* enable clock in SDO */
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sdo_write_mask(sdev, SDO_CLKCON, ~0, SDO_TVOUT_CLOCK_ON);
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clk_enable(sdev->dacphy);
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/* enable DAC */
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sdo_write_mask(sdev, SDO_DAC, ~0, SDO_POWER_ON_DAC);
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sdo_reg_debug(sdev);
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return 0;
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}
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static int sdo_streamoff(struct sdo_device *sdev)
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{
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int tries;
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sdo_write_mask(sdev, SDO_DAC, 0, SDO_POWER_ON_DAC);
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clk_disable(sdev->dacphy);
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sdo_write_mask(sdev, SDO_CLKCON, 0, SDO_TVOUT_CLOCK_ON);
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for (tries = 100; tries; --tries) {
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if (sdo_read(sdev, SDO_CLKCON) & SDO_TVOUT_CLOCK_READY)
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break;
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mdelay(1);
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}
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if (tries == 0)
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dev_err(sdev->dev, "failed to stop streaming\n");
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return tries ? 0 : -EIO;
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}
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static int sdo_s_stream(struct v4l2_subdev *sd, int on)
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{
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struct sdo_device *sdev = sd_to_sdev(sd);
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return on ? sdo_streamon(sdev) : sdo_streamoff(sdev);
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}
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static const struct v4l2_subdev_core_ops sdo_sd_core_ops = {
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.s_power = sdo_s_power,
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};
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static const struct v4l2_subdev_video_ops sdo_sd_video_ops = {
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.s_std_output = sdo_s_std_output,
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.g_std_output = sdo_g_std_output,
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.g_tvnorms_output = sdo_g_tvnorms_output,
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.g_mbus_fmt = sdo_g_mbus_fmt,
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.s_stream = sdo_s_stream,
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};
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static const struct v4l2_subdev_ops sdo_sd_ops = {
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.core = &sdo_sd_core_ops,
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.video = &sdo_sd_video_ops,
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};
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static int sdo_runtime_suspend(struct device *dev)
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{
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struct v4l2_subdev *sd = dev_get_drvdata(dev);
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struct sdo_device *sdev = sd_to_sdev(sd);
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dev_info(dev, "suspend\n");
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regulator_disable(sdev->vdet);
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regulator_disable(sdev->vdac);
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clk_disable(sdev->sclk_dac);
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return 0;
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}
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static int sdo_runtime_resume(struct device *dev)
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{
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struct v4l2_subdev *sd = dev_get_drvdata(dev);
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struct sdo_device *sdev = sd_to_sdev(sd);
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dev_info(dev, "resume\n");
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clk_enable(sdev->sclk_dac);
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regulator_enable(sdev->vdac);
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regulator_enable(sdev->vdet);
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/* software reset */
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sdo_write_mask(sdev, SDO_CLKCON, ~0, SDO_TVOUT_SW_RESET);
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mdelay(10);
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sdo_write_mask(sdev, SDO_CLKCON, 0, SDO_TVOUT_SW_RESET);
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/* setting TV mode */
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sdo_write_mask(sdev, SDO_CONFIG, sdev->fmt->cookie, SDO_STANDARD_MASK);
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/* XXX: forcing interlaced mode using undocumented bit */
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sdo_write_mask(sdev, SDO_CONFIG, 0, SDO_PROGRESSIVE);
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/* turn all VBI off */
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sdo_write_mask(sdev, SDO_VBI, 0, SDO_CVBS_WSS_INS |
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SDO_CVBS_CLOSED_CAPTION_MASK);
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/* turn all post processing off */
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sdo_write_mask(sdev, SDO_CCCON, ~0, SDO_COMPENSATION_BHS_ADJ_OFF |
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SDO_COMPENSATION_CVBS_COMP_OFF);
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sdo_reg_debug(sdev);
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return 0;
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}
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static const struct dev_pm_ops sdo_pm_ops = {
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.runtime_suspend = sdo_runtime_suspend,
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.runtime_resume = sdo_runtime_resume,
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};
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static int __devinit sdo_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct sdo_device *sdev;
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struct resource *res;
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int ret = 0;
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struct clk *sclk_vpll;
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dev_info(dev, "probe start\n");
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sdev = devm_kzalloc(&pdev->dev, sizeof *sdev, GFP_KERNEL);
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if (!sdev) {
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dev_err(dev, "not enough memory.\n");
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ret = -ENOMEM;
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goto fail;
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}
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sdev->dev = dev;
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/* mapping registers */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (res == NULL) {
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dev_err(dev, "get memory resource failed.\n");
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ret = -ENXIO;
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goto fail;
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}
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sdev->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
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if (sdev->regs == NULL) {
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dev_err(dev, "register mapping failed.\n");
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ret = -ENXIO;
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goto fail;
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}
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/* acquiring interrupt */
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res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (res == NULL) {
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dev_err(dev, "get interrupt resource failed.\n");
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ret = -ENXIO;
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goto fail;
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}
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ret = devm_request_irq(&pdev->dev, res->start, sdo_irq_handler, 0,
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"s5p-sdo", sdev);
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if (ret) {
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dev_err(dev, "request interrupt failed.\n");
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goto fail;
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}
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sdev->irq = res->start;
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/* acquire clocks */
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sdev->sclk_dac = clk_get(dev, "sclk_dac");
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if (IS_ERR_OR_NULL(sdev->sclk_dac)) {
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dev_err(dev, "failed to get clock 'sclk_dac'\n");
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ret = -ENXIO;
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goto fail;
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}
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sdev->dac = clk_get(dev, "dac");
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if (IS_ERR_OR_NULL(sdev->dac)) {
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dev_err(dev, "failed to get clock 'dac'\n");
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ret = -ENXIO;
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goto fail_sclk_dac;
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}
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sdev->dacphy = clk_get(dev, "dacphy");
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if (IS_ERR_OR_NULL(sdev->dacphy)) {
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dev_err(dev, "failed to get clock 'dacphy'\n");
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ret = -ENXIO;
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goto fail_dac;
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}
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sclk_vpll = clk_get(dev, "sclk_vpll");
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if (IS_ERR_OR_NULL(sclk_vpll)) {
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dev_err(dev, "failed to get clock 'sclk_vpll'\n");
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ret = -ENXIO;
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goto fail_dacphy;
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}
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clk_set_parent(sdev->sclk_dac, sclk_vpll);
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clk_put(sclk_vpll);
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sdev->fout_vpll = clk_get(dev, "fout_vpll");
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if (IS_ERR_OR_NULL(sdev->fout_vpll)) {
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dev_err(dev, "failed to get clock 'fout_vpll'\n");
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goto fail_dacphy;
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}
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dev_info(dev, "fout_vpll.rate = %lu\n", clk_get_rate(sclk_vpll));
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/* acquire regulator */
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sdev->vdac = devm_regulator_get(dev, "vdd33a_dac");
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if (IS_ERR_OR_NULL(sdev->vdac)) {
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dev_err(dev, "failed to get regulator 'vdac'\n");
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goto fail_fout_vpll;
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}
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sdev->vdet = devm_regulator_get(dev, "vdet");
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if (IS_ERR_OR_NULL(sdev->vdet)) {
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dev_err(dev, "failed to get regulator 'vdet'\n");
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goto fail_fout_vpll;
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}
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/* enable gate for dac clock, because mixer uses it */
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clk_enable(sdev->dac);
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/* configure power management */
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pm_runtime_enable(dev);
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/* configuration of interface subdevice */
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v4l2_subdev_init(&sdev->sd, &sdo_sd_ops);
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sdev->sd.owner = THIS_MODULE;
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strlcpy(sdev->sd.name, "s5p-sdo", sizeof sdev->sd.name);
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/* set default format */
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sdev->fmt = sdo_find_format(SDO_DEFAULT_STD);
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BUG_ON(sdev->fmt == NULL);
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/* keeping subdev in device's private for use by other drivers */
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dev_set_drvdata(dev, &sdev->sd);
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dev_info(dev, "probe succeeded\n");
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return 0;
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fail_fout_vpll:
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clk_put(sdev->fout_vpll);
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fail_dacphy:
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clk_put(sdev->dacphy);
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fail_dac:
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clk_put(sdev->dac);
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fail_sclk_dac:
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clk_put(sdev->sclk_dac);
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fail:
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dev_info(dev, "probe failed\n");
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return ret;
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}
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static int __devexit sdo_remove(struct platform_device *pdev)
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{
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struct v4l2_subdev *sd = dev_get_drvdata(&pdev->dev);
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struct sdo_device *sdev = sd_to_sdev(sd);
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pm_runtime_disable(&pdev->dev);
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clk_disable(sdev->dac);
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clk_put(sdev->fout_vpll);
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clk_put(sdev->dacphy);
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clk_put(sdev->dac);
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clk_put(sdev->sclk_dac);
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dev_info(&pdev->dev, "remove successful\n");
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return 0;
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}
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static struct platform_driver sdo_driver __refdata = {
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.probe = sdo_probe,
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.remove = __devexit_p(sdo_remove),
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.driver = {
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.name = "s5p-sdo",
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.owner = THIS_MODULE,
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.pm = &sdo_pm_ops,
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}
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};
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module_platform_driver(sdo_driver);
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