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@xxxxxx>
---
v1 -> v2
1. switched to using v4l2_get_subdevdata(sd) instead of sd->priv
2. changed maximum height to 576 for PAL
3. removed a superfluous call to i2c_set_clientdata()
4. added a call to v4l2_device_unregister_subdev(sd)
5. moved IDs to preserve the ordering
What I haven't done:
1. kept dev_{dbg,info} instead of switching to v4l2_* analogs - Hans
wanted to rethink the current policy
2. didn't modify the "chip found" line - partially because of unclarities
with v4l2_info and double I2C address, partially because for
configurations, where chips are on CPU's i2c bus printing adapter name
doesn't make much sense, and the proposed line doesn't include the chip
ID, only its revision.
I would sugest to apply the patch as is and to adjust these remaining
points later when we have a better consensus about them.
drivers/media/video/Kconfig | 6 +
drivers/media/video/Makefile | 2 +
drivers/media/video/ak881x.c | 375 +++++++++++++++++++++++++++++++++++++++
include/media/ak881x.h | 25 +++
include/media/v4l2-chip-ident.h | 4 +
5 files changed, 412 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/ak881x.c
create mode 100644 include/media/ak881x.h
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index be6d016..f7b1f89 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -471,6 +471,12 @@ 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
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index 2669d34..6790051 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -149,6 +149,8 @@ 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
index 0000000..16fe025
--- /dev/null
+++ b/drivers/media/video/ak881x.c
@@ -0,0 +1,375 @@
+/*
+ * Driver for AK8813 / AK8814 TV-ecoders from Asahi Kasei Microsystems Co., Ltd. (AKM)
+ *
+ * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
+ *
+ * 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;
+
+ switch (std) {
+ case V4L2_STD_NTSC_M:
+ default:
+ vp1 = 0;
+ ak881x->lines = 480;
+ break;
+ case V4L2_STD_NTSC_443:
+ vp1 = 3;
+ ak881x->lines = 480;
+ break;
+ case V4L2_STD_PAL_M:
+ vp1 = 5;
+ ak881x->lines = 480;
+ break;
+ case V4L2_STD_PAL_60:
+ vp1 = 7;
+ ak881x->lines = 480;
+ break;
+ case V4L2_STD_PAL_B:
+ case V4L2_STD_PAL_D:
+ case V4L2_STD_PAL_G:
+ case V4L2_STD_PAL_H:
+ case V4L2_STD_PAL_I:
+ vp1 = 0xf;
+ ak881x->lines = 576;
+ }
+
+ 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@xxxxxx>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/media/ak881x.h b/include/media/ak881x.h
new file mode 100644
index 0000000..b7f2add
--- /dev/null
+++ b/include/media/ak881x.h
@@ -0,0 +1,25 @@
+/*
+ * Header for AK8813 / AK8814 TV-ecoders from Asahi Kasei Microsystems Co., Ltd. (AKM)
+ *
+ * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
+ *
+ * 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
diff --git a/include/media/v4l2-chip-ident.h b/include/media/v4l2-chip-ident.h
index 9812d08..a487977 100644
--- a/include/media/v4l2-chip-ident.h
+++ b/include/media/v4l2-chip-ident.h
@@ -171,6 +171,10 @@ 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 */
--
1.6.2.4
--
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