V4L/DVB (6869): cs5345: new i2c driver

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 168 insertions, 0 deletions

diff --git a/drivers/media/video/cs5345.c b/drivers/media/video/cs5345.c
new file mode 100644
index 000000000000..fae469ce16f5
--- /dev/null
+++ b/drivers/media/video/cs5345.c
@@ -0,0 +1,168 @@
+/*
+ * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
+ * Copyright (C) 2007 Hans Verkuil
+ *
+ * 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/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-i2c-drv.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-chip-ident.h>
+
+MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
+MODULE_AUTHOR("Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+static int debug;
+
+module_param(debug, bool, 0644);
+
+MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On");
+
+
+/* ----------------------------------------------------------------------- */
+
+static inline int cs5345_write(struct i2c_client *client, u8 reg, u8 value)
+{
+        return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static inline int cs5345_read(struct i2c_client *client, u8 reg)
+{
+        return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int cs5345_command(struct i2c_client *client, unsigned cmd, void *arg)
+{
+        struct v4l2_routing *route = arg;
+        struct v4l2_control *ctrl = arg;
+
+        switch (cmd) {
+        case VIDIOC_INT_G_AUDIO_ROUTING:
+                route->input = cs5345_read(client, 0x09) & 7;
+                route->input |= cs5345_read(client, 0x05) & 0x70;
+                route->output = 0;
+                break;
+
+        case VIDIOC_INT_S_AUDIO_ROUTING:
+                if ((route->input & 0xf) > 6) {
+                        v4l_err(client, "Invalid input %d.\n", route->input);
+                        return -EINVAL;
+                }
+                cs5345_write(client, 0x09, route->input & 0xf);
+                cs5345_write(client, 0x05, route->input & 0xf0);
+                break;
+
+        case VIDIOC_G_CTRL:
+                if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
+                        ctrl->value = (cs5345_read(client, 0x04) & 0x08) != 0;
+                        break;
+                }
+                if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
+                        return -EINVAL;
+                ctrl->value = cs5345_read(client, 0x07) & 0x3f;
+                if (ctrl->value >= 32)
+                        ctrl->value = ctrl->value - 64;
+                break;
+
+        case VIDIOC_S_CTRL:
+                break;
+                if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
+                        cs5345_write(client, 0x04, ctrl->value ? 0x80 : 0);
+                        break;
+                }
+                if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
+                        return -EINVAL;
+                if (ctrl->value > 24 || ctrl->value < -24)
+                        return -EINVAL;
+                cs5345_write(client, 0x07, ((u8)ctrl->value) & 0x3f);
+                cs5345_write(client, 0x08, ((u8)ctrl->value) & 0x3f);
+                break;
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        case VIDIOC_DBG_G_REGISTER:
+        case VIDIOC_DBG_S_REGISTER:
+        {
+                struct v4l2_register *reg = arg;
+
+                if (!v4l2_chip_match_i2c_client(client,
+                                        reg->match_type, reg->match_chip))
+                        return -EINVAL;
+                if (!capable(CAP_SYS_ADMIN))
+                        return -EPERM;
+                if (cmd == VIDIOC_DBG_G_REGISTER)
+                        reg->val = cs5345_read(client, reg->reg & 0x1f);
+                else
+                        cs5345_write(client, reg->reg & 0x1f, reg->val & 0x1f);
+                break;
+        }
+#endif
+
+        case VIDIOC_G_CHIP_IDENT:
+                return v4l2_chip_ident_i2c_client(client,
+                                arg, V4L2_IDENT_CS5345, 0);
+
+        case VIDIOC_LOG_STATUS:
+                {
+                        u8 v = cs5345_read(client, 0x09) & 7;
+                        u8 m = cs5345_read(client, 0x04);
+                        int vol = cs5345_read(client, 0x08) & 0x3f;
+
+                        v4l_info(client, "Input:  %d%s\n", v,
+                                      (m & 0x80) ? " (muted)" : "");
+                        if (vol >= 32)
+                                vol = vol - 64;
+                        v4l_info(client, "Volume: %d dB\n", vol);
+                        break;
+                }
+
+        default:
+                return -EINVAL;
+        }
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int cs5345_probe(struct i2c_client *client)
+{
+        /* 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);
+
+        cs5345_write(client, 0x02, 0x00);
+        cs5345_write(client, 0x04, 0x01);
+        cs5345_write(client, 0x09, 0x01);
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+        .name = "cs5345",
+        .driverid = I2C_DRIVERID_CS5345,
+        .command = cs5345_command,
+        .probe = cs5345_probe,
+};
+