[media] move i2c files into drivers/media/i2c

Move ancillary I2C drivers into drivers/media/i2c, in order to
better organize them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 216 insertions, 0 deletions

diff --git a/drivers/media/i2c/m52790.c b/drivers/media/i2c/m52790.c
new file mode 100644
index 000000000000..0991576f4c82
--- /dev/null
+++ b/drivers/media/i2c/m52790.c
@@ -0,0 +1,216 @@
+/*
+ * m52790 i2c ivtv driver.
+ * Copyright (C) 2007  Hans Verkuil
+ *
+ * A/V source switching Mitsubishi M52790SP/FP
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/ioctl.h>
+#include <asm/uaccess.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/m52790.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+
+MODULE_DESCRIPTION("i2c device driver for m52790 A/V switch");
+MODULE_AUTHOR("Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+
+struct m52790_state {
+        struct v4l2_subdev sd;
+        u16 input;
+        u16 output;
+};
+
+static inline struct m52790_state *to_state(struct v4l2_subdev *sd)
+{
+        return container_of(sd, struct m52790_state, sd);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int m52790_write(struct v4l2_subdev *sd)
+{
+        struct m52790_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        u8 sw1 = (state->input | state->output) & 0xff;
+        u8 sw2 = (state->input | state->output) >> 8;
+
+        return i2c_smbus_write_byte_data(client, sw1, sw2);
+}
+
+/* Note: audio and video are linked and cannot be switched separately.
+   So audio and video routing commands are identical for this chip.
+   In theory the video amplifier and audio modes could be handled
+   separately for the output, but that seems to be overkill right now.
+   The same holds for implementing an audio mute control, this is now
+   part of the audio output routing. The normal case is that another
+   chip takes care of the actual muting so making it part of the
+   output routing seems to be the right thing to do for now. */
+static int m52790_s_routing(struct v4l2_subdev *sd,
+                            u32 input, u32 output, u32 config)
+{
+        struct m52790_state *state = to_state(sd);
+
+        state->input = input;
+        state->output = output;
+        m52790_write(sd);
+        return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int m52790_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
+{
+        struct m52790_state *state = to_state(sd);
+        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;
+        if (reg->reg != 0)
+                return -EINVAL;
+        reg->size = 1;
+        reg->val = state->input | state->output;
+        return 0;
+}
+
+static int m52790_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
+{
+        struct m52790_state *state = to_state(sd);
+        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;
+        if (reg->reg != 0)
+                return -EINVAL;
+        state->input = reg->val & 0x0303;
+        state->output = reg->val & ~0x0303;
+        m52790_write(sd);
+        return 0;
+}
+#endif
+
+static int m52790_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_M52790, 0);
+}
+
+static int m52790_log_status(struct v4l2_subdev *sd)
+{
+        struct m52790_state *state = to_state(sd);
+
+        v4l2_info(sd, "Switch 1: %02x\n",
+                        (state->input | state->output) & 0xff);
+        v4l2_info(sd, "Switch 2: %02x\n",
+                        (state->input | state->output) >> 8);
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_subdev_core_ops m52790_core_ops = {
+        .log_status = m52790_log_status,
+        .g_chip_ident = m52790_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        .g_register = m52790_g_register,
+        .s_register = m52790_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_audio_ops m52790_audio_ops = {
+        .s_routing = m52790_s_routing,
+};
+
+static const struct v4l2_subdev_video_ops m52790_video_ops = {
+        .s_routing = m52790_s_routing,
+};
+
+static const struct v4l2_subdev_ops m52790_ops = {
+        .core = &m52790_core_ops,
+        .audio = &m52790_audio_ops,
+        .video = &m52790_video_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+
+static int m52790_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+        struct m52790_state *state;
+        struct v4l2_subdev *sd;
+
+        /* Check if the adapter supports the needed features */
+        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 m52790_state), GFP_KERNEL);
+        if (state == NULL)
+                return -ENOMEM;
+
+        sd = &state->sd;
+        v4l2_i2c_subdev_init(sd, client, &m52790_ops);
+        state->input = M52790_IN_TUNER;
+        state->output = M52790_OUT_STEREO;
+        m52790_write(sd);
+        return 0;
+}
+
+static int m52790_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 m52790_id[] = {
+        { "m52790", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, m52790_id);
+
+static struct i2c_driver m52790_driver = {
+        .driver = {
+                .owner  = THIS_MODULE,
+                .name   = "m52790",
+        },
+        .probe          = m52790_probe,
+        .remove         = m52790_remove,
+        .id_table       = m52790_id,
+};
+
+module_i2c_driver(m52790_driver);