--- /dev/null
+/*
+ * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
+ *
+ * 2003 by T.Adachi (tadachi@tadachi-net.com)
+ * 2003 by Takeru KOMORIYA <komoriya@paken.org>
+ * 2006 by Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * 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 Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/upd64083.h>
+
+MODULE_DESCRIPTION("uPD64083 driver");
+MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+static bool debug;
+module_param(debug, bool, 0644);
+
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+
+enum {
+ R00 = 0, R01, R02, R03, R04,
+ R05, R06, R07, R08, R09,
+ R0A, R0B, R0C, R0D, R0E, R0F,
+ R10, R11, R12, R13, R14,
+ R15, R16,
+ TOT_REGS
+};
+
+struct upd64083_state {
+ struct v4l2_subdev sd;
+ u8 mode;
+ u8 ext_y_adc;
+ u8 regs[TOT_REGS];
+};
+
+static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct upd64083_state, sd);
+}
+
+/* Initial values when used in combination with the
+ NEC upd64031a ghost reduction chip. */
+static u8 upd64083_init[] = {
+ 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */
+ 0x36, 0xdd, 0x05, 0x56, 0x48,
+ 0x00, 0x3a, 0xa0, 0x05, 0x08,
+ 0x44, 0x60, 0x08, 0x52, 0xf8,
+ 0x53, 0x60, 0x10
+};
+
+/* ------------------------------------------------------------------------ */
+
+static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u8 buf[2];
+
+ buf[0] = reg;
+ buf[1] = val;
+ v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
+ if (i2c_master_send(client, buf, 2) != 2)
+ v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
+}
+
+/* ------------------------------------------------------------------------ */
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u8 buf[7];
+
+ if (reg >= sizeof(buf))
+ return 0xff;
+ i2c_master_recv(client, buf, sizeof(buf));
+ return buf[reg];
+}
+#endif
+
+/* ------------------------------------------------------------------------ */
+
+static int upd64083_s_routing(struct v4l2_subdev *sd,
+ u32 input, u32 output, u32 config)
+{
+ struct upd64083_state *state = to_state(sd);
+ u8 r00, r02;
+
+ if (input > 7 || (input & 6) == 6)
+ return -EINVAL;
+ state->mode = (input & 3) << 6;
+ state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3;
+ r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
+ r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
+ upd64083_write(sd, R00, r00);
+ upd64083_write(sd, R02, r02);
+ return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
+{
+ reg->val = upd64083_read(sd, reg->reg & 0xff);
+ reg->size = 1;
+ return 0;
+}
+
+static int upd64083_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
+{
+ upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
+ return 0;
+}
+#endif
+
+static int upd64083_log_status(struct v4l2_subdev *sd)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u8 buf[7];
+
+ i2c_master_recv(client, buf, 7);
+ v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
+ "SA04=%02x SA05=%02x SA06=%02x\n",
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_subdev_core_ops upd64083_core_ops = {
+ .log_status = upd64083_log_status,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = upd64083_g_register,
+ .s_register = upd64083_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_video_ops upd64083_video_ops = {
+ .s_routing = upd64083_s_routing,
+};
+
+static const struct v4l2_subdev_ops upd64083_ops = {
+ .core = &upd64083_core_ops,
+ .video = &upd64083_video_ops,
+};
+
+/* ------------------------------------------------------------------------ */
+
+/* i2c implementation */
+
+static int upd64083_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct upd64083_state *state;
+ struct v4l2_subdev *sd;
+ int i;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ v4l_info(client, "chip found @ 0x%x (%s)\n",
+ client->addr << 1, client->adapter->name);
+
+ state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
+ if (state == NULL)
+ return -ENOMEM;
+ sd = &state->sd;
+ v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
+ /* Initially assume that a ghost reduction chip is present */
+ state->mode = 0; /* YCS mode */
+ state->ext_y_adc = (1 << 5);
+ memcpy(state->regs, upd64083_init, TOT_REGS);
+ for (i = 0; i < TOT_REGS; i++)
+ upd64083_write(sd, i, state->regs[i]);
+ return 0;
+}
+
+static int upd64083_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+ v4l2_device_unregister_subdev(sd);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id upd64083_id[] = {
+ { "upd64083", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, upd64083_id);
+
+static struct i2c_driver upd64083_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "upd64083",
+ },
+ .probe = upd64083_probe,
+ .remove = upd64083_remove,
+ .id_table = upd64083_id,
+};
+
+module_i2c_driver(upd64083_driver);
Code Review / kvmfornfv.git / blobdiff