[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, 230 insertions, 0 deletions

diff --git a/drivers/media/i2c/tlv320aic23b.c b/drivers/media/i2c/tlv320aic23b.c
new file mode 100644
index 000000000000..809a75a558ee
--- /dev/null
+++ b/drivers/media/i2c/tlv320aic23b.c
@@ -0,0 +1,230 @@
+/*
+ * tlv320aic23b - driver version 0.0.1
+ *
+ * Copyright (C) 2006 Scott Alfter <salfter@ssai.us>
+ *
+ * Based on wm8775 driver
+ *
+ * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
+ * Copyright (C) 2005 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., 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/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+
+MODULE_DESCRIPTION("tlv320aic23b driver");
+MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+
+/* ----------------------------------------------------------------------- */
+
+struct tlv320aic23b_state {
+        struct v4l2_subdev sd;
+        struct v4l2_ctrl_handler hdl;
+};
+
+static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd)
+{
+        return container_of(sd, struct tlv320aic23b_state, sd);
+}
+
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+        return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd;
+}
+
+static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        int i;
+
+        if ((reg < 0 || reg > 9) && (reg != 15)) {
+                v4l2_err(sd, "Invalid register R%d\n", reg);
+                return -1;
+        }
+
+        for (i = 0; i < 3; i++)
+                if (i2c_smbus_write_byte_data(client,
+                                (reg << 1) | (val >> 8), val & 0xff) == 0)
+                        return 0;
+        v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
+        return -1;
+}
+
+static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
+{
+        switch (freq) {
+        case 32000: /* set sample rate to 32 kHz */
+                tlv320aic23b_write(sd, 8, 0x018);
+                break;
+        case 44100: /* set sample rate to 44.1 kHz */
+                tlv320aic23b_write(sd, 8, 0x022);
+                break;
+        case 48000: /* set sample rate to 48 kHz */
+                tlv320aic23b_write(sd, 8, 0x000);
+                break;
+        default:
+                return -EINVAL;
+        }
+        return 0;
+}
+
+static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+        struct v4l2_subdev *sd = to_sd(ctrl);
+
+        switch (ctrl->id) {
+        case V4L2_CID_AUDIO_MUTE:
+                tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */
+                /* set gain on both channels to +3.0 dB */
+                if (!ctrl->val)
+                        tlv320aic23b_write(sd, 0, 0x119);
+                return 0;
+        }
+        return -EINVAL;
+}
+
+static int tlv320aic23b_log_status(struct v4l2_subdev *sd)
+{
+        struct tlv320aic23b_state *state = to_state(sd);
+
+        v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = {
+        .s_ctrl = tlv320aic23b_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = {
+        .log_status = tlv320aic23b_log_status,
+        .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
+        .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
+        .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
+        .g_ctrl = v4l2_subdev_g_ctrl,
+        .s_ctrl = v4l2_subdev_s_ctrl,
+        .queryctrl = v4l2_subdev_queryctrl,
+        .querymenu = v4l2_subdev_querymenu,
+};
+
+static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = {
+        .s_clock_freq = tlv320aic23b_s_clock_freq,
+};
+
+static const struct v4l2_subdev_ops tlv320aic23b_ops = {
+        .core = &tlv320aic23b_core_ops,
+        .audio = &tlv320aic23b_audio_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+
+/*
+ * Generic i2c probe
+ * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
+ */
+
+static int tlv320aic23b_probe(struct i2c_client *client,
+                              const struct i2c_device_id *id)
+{
+        struct tlv320aic23b_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 tlv320aic23b_state), GFP_KERNEL);
+        if (state == NULL)
+                return -ENOMEM;
+        sd = &state->sd;
+        v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops);
+
+        /* Initialize tlv320aic23b */
+
+        /* RESET */
+        tlv320aic23b_write(sd, 15, 0x000);
+        /* turn off DAC & mic input */
+        tlv320aic23b_write(sd, 6, 0x00A);
+        /* left-justified, 24-bit, master mode */
+        tlv320aic23b_write(sd, 7, 0x049);
+        /* set gain on both channels to +3.0 dB */
+        tlv320aic23b_write(sd, 0, 0x119);
+        /* set sample rate to 48 kHz */
+        tlv320aic23b_write(sd, 8, 0x000);
+        /* activate digital interface */
+        tlv320aic23b_write(sd, 9, 0x001);
+
+        v4l2_ctrl_handler_init(&state->hdl, 1);
+        v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops,
+                        V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
+        sd->ctrl_handler = &state->hdl;
+        if (state->hdl.error) {
+                int err = state->hdl.error;
+
+                v4l2_ctrl_handler_free(&state->hdl);
+                kfree(state);
+                return err;
+        }
+        v4l2_ctrl_handler_setup(&state->hdl);
+        return 0;
+}
+
+static int tlv320aic23b_remove(struct i2c_client *client)
+{
+        struct v4l2_subdev *sd = i2c_get_clientdata(client);
+        struct tlv320aic23b_state *state = to_state(sd);
+
+        v4l2_device_unregister_subdev(sd);
+        v4l2_ctrl_handler_free(&state->hdl);
+        kfree(state);
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id tlv320aic23b_id[] = {
+        { "tlv320aic23b", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id);
+
+static struct i2c_driver tlv320aic23b_driver = {
+        .driver = {
+                .owner  = THIS_MODULE,
+                .name   = "tlv320aic23b",
+        },
+        .probe          = tlv320aic23b_probe,
+        .remove         = tlv320aic23b_remove,
+        .id_table       = tlv320aic23b_id,
+};
+
+module_i2c_driver(tlv320aic23b_driver);