1 files changed, 246 insertions, 0 deletions

diff --git a/drivers/media/i2c/upd64083.c b/drivers/media/i2c/upd64083.c
new file mode 100644
index 000000000000..75d6acc62018
--- /dev/null
+++ b/drivers/media/i2c/upd64083.c
@@ -0,0 +1,246 @@
+/*
+ * 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/v4l2-chip-ident.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)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        if (!v4l2_chip_match_i2c_client(client, &reg->match))
+                return -EINVAL;
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+        reg->val = upd64083_read(sd, reg->reg & 0xff);
+        reg->size = 1;
+        return 0;
+}
+
+static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        if (!v4l2_chip_match_i2c_client(client, &reg->match))
+                return -EINVAL;
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+        upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
+        return 0;
+}
+#endif
+
+static int upd64083_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0);
+}
+
+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,
+        .g_chip_ident = upd64083_g_chip_ident,
+#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 = kzalloc(sizeof(struct upd64083_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);
+        kfree(to_state(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);