V4L/DVB: V4L: v4l2-subdev driver for AK8813 and AK8814 TV-encoders from AKM
Guennadi Liakhovetski [Mon, 29 Mar 2010 07:45:22 +0000 (04:45 -0300)]
AK8814 only differs from AK8813 by included Macrovision Copy Protection
function. This patch adds a driver for AK8813 and AK8814 I2C PAL/NTSC TV
encoders.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig
drivers/media/video/Makefile
drivers/media/video/ak881x.c [new file with mode: 0644]
include/media/ak881x.h [new file with mode: 0644]
include/media/v4l2-chip-ident.h

index e2fad46..747f106 100644 (file)
@@ -480,6 +480,12 @@ config VIDEO_ADV7343
          To compile this driver as a module, choose M here: the
          module will be called adv7343.
 
+config VIDEO_AK881X
+       tristate "AK8813/AK8814 video encoders"
+       depends on I2C
+       help
+         Video output driver for AKM AK8813 and AK8814 TV encoders
+
 comment "Video improvement chips"
 
 config VIDEO_UPD64031A
index ed52b6b..4555f5f 100644 (file)
@@ -151,6 +151,8 @@ obj-$(CONFIG_VIDEO_CX18) += cx18/
 obj-$(CONFIG_VIDEO_VIVI) += vivi.o
 obj-$(CONFIG_VIDEO_CX23885) += cx23885/
 
+obj-$(CONFIG_VIDEO_AK881X)             += ak881x.o
+
 obj-$(CONFIG_VIDEO_OMAP2)              += omap2cam.o
 obj-$(CONFIG_SOC_CAMERA)               += soc_camera.o soc_mediabus.o
 obj-$(CONFIG_SOC_CAMERA_PLATFORM)      += soc_camera_platform.o
diff --git a/drivers/media/video/ak881x.c b/drivers/media/video/ak881x.c
new file mode 100644 (file)
index 0000000..35390d4
--- /dev/null
@@ -0,0 +1,368 @@
+/*
+ * Driver for AK8813 / AK8814 TV-ecoders from Asahi Kasei Microsystems Co., Ltd. (AKM)
+ *
+ * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/videodev2.h>
+
+#include <media/ak881x.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+
+#define AK881X_INTERFACE_MODE  0
+#define AK881X_VIDEO_PROCESS1  1
+#define AK881X_VIDEO_PROCESS2  2
+#define AK881X_VIDEO_PROCESS3  3
+#define AK881X_DAC_MODE                5
+#define AK881X_STATUS          0x24
+#define AK881X_DEVICE_ID       0x25
+#define AK881X_DEVICE_REVISION 0x26
+
+struct ak881x {
+       struct v4l2_subdev subdev;
+       struct ak881x_pdata *pdata;
+       unsigned int lines;
+       int id; /* DEVICE_ID code V4L2_IDENT_AK881X code from v4l2-chip-ident.h */
+       char revision;  /* DEVICE_REVISION content */
+};
+
+static int reg_read(struct i2c_client *client, const u8 reg)
+{
+       return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int reg_write(struct i2c_client *client, const u8 reg,
+                    const u8 data)
+{
+       return i2c_smbus_write_byte_data(client, reg, data);
+}
+
+static int reg_set(struct i2c_client *client, const u8 reg,
+                  const u8 data, u8 mask)
+{
+       int ret = reg_read(client, reg);
+       if (ret < 0)
+               return ret;
+       return reg_write(client, reg, (ret & ~mask) | (data & mask));
+}
+
+static struct ak881x *to_ak881x(const struct i2c_client *client)
+{
+       return container_of(i2c_get_clientdata(client), struct ak881x, subdev);
+}
+
+static int ak881x_g_chip_ident(struct v4l2_subdev *sd,
+                              struct v4l2_dbg_chip_ident *id)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct ak881x *ak881x = to_ak881x(client);
+
+       if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
+               return -EINVAL;
+
+       if (id->match.addr != client->addr)
+               return -ENODEV;
+
+       id->ident       = ak881x->id;
+       id->revision    = ak881x->revision;
+
+       return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int ak881x_g_register(struct v4l2_subdev *sd,
+                            struct v4l2_dbg_register *reg)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+       if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26)
+               return -EINVAL;
+
+       if (reg->match.addr != client->addr)
+               return -ENODEV;
+
+       reg->val = reg_read(client, reg->reg);
+
+       if (reg->val > 0xffff)
+               return -EIO;
+
+       return 0;
+}
+
+static int ak881x_s_register(struct v4l2_subdev *sd,
+                            struct v4l2_dbg_register *reg)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+       if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26)
+               return -EINVAL;
+
+       if (reg->match.addr != client->addr)
+               return -ENODEV;
+
+       if (reg_write(client, reg->reg, reg->val) < 0)
+               return -EIO;
+
+       return 0;
+}
+#endif
+
+static int ak881x_try_g_mbus_fmt(struct v4l2_subdev *sd,
+                                struct v4l2_mbus_framefmt *mf)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct ak881x *ak881x = to_ak881x(client);
+
+       v4l_bound_align_image(&mf->width, 0, 720, 2,
+                             &mf->height, 0, ak881x->lines, 1, 0);
+       mf->field       = V4L2_FIELD_INTERLACED;
+       mf->code        = V4L2_MBUS_FMT_YUYV8_2X8_LE;
+       mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
+
+       return 0;
+}
+
+static int ak881x_s_mbus_fmt(struct v4l2_subdev *sd,
+                            struct v4l2_mbus_framefmt *mf)
+{
+       if (mf->field != V4L2_FIELD_INTERLACED ||
+           mf->code != V4L2_MBUS_FMT_YUYV8_2X8_LE)
+               return -EINVAL;
+
+       return ak881x_try_g_mbus_fmt(sd, mf);
+}
+
+static int ak881x_enum_mbus_fmt(struct v4l2_subdev *sd, int index,
+                               enum v4l2_mbus_pixelcode *code)
+{
+       if (index)
+               return -EINVAL;
+
+       *code = V4L2_MBUS_FMT_YUYV8_2X8_LE;
+       return 0;
+}
+
+static int ak881x_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct ak881x *ak881x = to_ak881x(client);
+
+       a->bounds.left                  = 0;
+       a->bounds.top                   = 0;
+       a->bounds.width                 = 720;
+       a->bounds.height                = ak881x->lines;
+       a->defrect                      = a->bounds;
+       a->type                         = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+       a->pixelaspect.numerator        = 1;
+       a->pixelaspect.denominator      = 1;
+
+       return 0;
+}
+
+static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct ak881x *ak881x = to_ak881x(client);
+       u8 vp1;
+
+       if (std == V4L2_STD_NTSC_443) {
+               vp1 = 3;
+               ak881x->lines = 480;
+       } else if (std == V4L2_STD_PAL_M) {
+               vp1 = 5;
+               ak881x->lines = 480;
+       } else if (std == V4L2_STD_PAL_60) {
+               vp1 = 7;
+               ak881x->lines = 480;
+       } else if (std && !(std & ~V4L2_STD_PAL)) {
+               vp1 = 0xf;
+               ak881x->lines = 576;
+       } else if (std && !(std & ~V4L2_STD_NTSC)) {
+               vp1 = 0;
+               ak881x->lines = 480;
+       } else {
+               /* No SECAM or PAL_N/Nc supported */
+               return -EINVAL;
+       }
+
+       reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf);
+
+       return 0;
+}
+
+static int ak881x_s_stream(struct v4l2_subdev *sd, int enable)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct ak881x *ak881x = to_ak881x(client);
+
+       if (enable) {
+               u8 dac;
+               /* For colour-bar testing set bit 6 of AK881X_VIDEO_PROCESS1 */
+               /* Default: composite output */
+               if (ak881x->pdata->flags & AK881X_COMPONENT)
+                       dac = 3;
+               else
+                       dac = 4;
+               /* Turn on the DAC(s) */
+               reg_write(client, AK881X_DAC_MODE, dac);
+               dev_dbg(&client->dev, "chip status 0x%x\n",
+                       reg_read(client, AK881X_STATUS));
+       } else {
+               /* ...and clear bit 6 of AK881X_VIDEO_PROCESS1 here */
+               reg_write(client, AK881X_DAC_MODE, 0);
+               dev_dbg(&client->dev, "chip status 0x%x\n",
+                       reg_read(client, AK881X_STATUS));
+       }
+
+       return 0;
+}
+
+static struct v4l2_subdev_core_ops ak881x_subdev_core_ops = {
+       .g_chip_ident   = ak881x_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+       .g_register     = ak881x_g_register,
+       .s_register     = ak881x_s_register,
+#endif
+};
+
+static struct v4l2_subdev_video_ops ak881x_subdev_video_ops = {
+       .s_mbus_fmt     = ak881x_s_mbus_fmt,
+       .g_mbus_fmt     = ak881x_try_g_mbus_fmt,
+       .try_mbus_fmt   = ak881x_try_g_mbus_fmt,
+       .cropcap        = ak881x_cropcap,
+       .enum_mbus_fmt  = ak881x_enum_mbus_fmt,
+       .s_std_output   = ak881x_s_std_output,
+       .s_stream       = ak881x_s_stream,
+};
+
+static struct v4l2_subdev_ops ak881x_subdev_ops = {
+       .core   = &ak881x_subdev_core_ops,
+       .video  = &ak881x_subdev_video_ops,
+};
+
+static int ak881x_probe(struct i2c_client *client,
+                       const struct i2c_device_id *did)
+{
+       struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+       struct ak881x *ak881x;
+       u8 ifmode, data;
+
+       if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+               dev_warn(&adapter->dev,
+                        "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
+               return -EIO;
+       }
+
+       ak881x = kzalloc(sizeof(struct ak881x), GFP_KERNEL);
+       if (!ak881x)
+               return -ENOMEM;
+
+       v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops);
+
+       data = reg_read(client, AK881X_DEVICE_ID);
+
+       switch (data) {
+       case 0x13:
+               ak881x->id = V4L2_IDENT_AK8813;
+               break;
+       case 0x14:
+               ak881x->id = V4L2_IDENT_AK8814;
+               break;
+       default:
+               dev_err(&client->dev,
+                       "No ak881x chip detected, register read %x\n", data);
+               kfree(ak881x);
+               return -ENODEV;
+       }
+
+       ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION);
+       ak881x->pdata = client->dev.platform_data;
+
+       if (ak881x->pdata) {
+               if (ak881x->pdata->flags & AK881X_FIELD)
+                       ifmode = 4;
+               else
+                       ifmode = 0;
+
+               switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) {
+               case AK881X_IF_MODE_BT656:
+                       ifmode |= 1;
+                       break;
+               case AK881X_IF_MODE_MASTER:
+                       ifmode |= 2;
+                       break;
+               case AK881X_IF_MODE_SLAVE:
+               default:
+                       break;
+               }
+
+               dev_dbg(&client->dev, "IF mode %x\n", ifmode);
+
+               /*
+                * "Line Blanking No." seems to be the same as the number of
+                * "black" lines on, e.g., SuperH VOU, whose default value of 20
+                * "incidentally" matches ak881x' default
+                */
+               reg_write(client, AK881X_INTERFACE_MODE, ifmode | (20 << 3));
+       }
+
+       /* Hardware default: NTSC-M */
+       ak881x->lines = 480;
+
+       dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n",
+                data, ak881x->revision);
+
+       return 0;
+}
+
+static int ak881x_remove(struct i2c_client *client)
+{
+       struct ak881x *ak881x = to_ak881x(client);
+
+       v4l2_device_unregister_subdev(&ak881x->subdev);
+       kfree(ak881x);
+
+       return 0;
+}
+
+static const struct i2c_device_id ak881x_id[] = {
+       { "ak8813", 0 },
+       { "ak8814", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, ak881x_id);
+
+static struct i2c_driver ak881x_i2c_driver = {
+       .driver = {
+               .name = "ak881x",
+       },
+       .probe          = ak881x_probe,
+       .remove         = ak881x_remove,
+       .id_table       = ak881x_id,
+};
+
+static int __init ak881x_module_init(void)
+{
+       return i2c_add_driver(&ak881x_i2c_driver);
+}
+
+static void __exit ak881x_module_exit(void)
+{
+       i2c_del_driver(&ak881x_i2c_driver);
+}
+
+module_init(ak881x_module_init);
+module_exit(ak881x_module_exit);
+
+MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814");
+MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/media/ak881x.h b/include/media/ak881x.h
new file mode 100644 (file)
index 0000000..b7f2add
--- /dev/null
@@ -0,0 +1,25 @@
+/*
+ * Header for AK8813 / AK8814 TV-ecoders from Asahi Kasei Microsystems Co., Ltd. (AKM)
+ *
+ * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef AK881X_H
+#define AK881X_H
+
+#define AK881X_IF_MODE_MASK    (3 << 0)
+#define AK881X_IF_MODE_BT656   (0 << 0)
+#define AK881X_IF_MODE_MASTER  (1 << 0)
+#define AK881X_IF_MODE_SLAVE   (2 << 0)
+#define AK881X_FIELD           (1 << 2)
+#define AK881X_COMPONENT       (1 << 3)
+
+struct ak881x_pdata {
+       unsigned long flags;
+};
+
+#endif
index 42759db..21b4428 100644 (file)
@@ -178,6 +178,10 @@ enum {
        /* module cafe_ccic, just ident 8801 */
        V4L2_IDENT_CAFE = 8801,
 
+       /* AKM AK8813/AK8814 */
+       V4L2_IDENT_AK8813 = 8813,
+       V4L2_IDENT_AK8814 = 8814,
+
        /* module cx23885 and cx25840 */
        V4L2_IDENT_CX23885    = 8850,
        V4L2_IDENT_CX23885_AV = 8851, /* Integrated A/V decoder */