Initial import

1 files changed, 210 insertions, 0 deletions

diff --git a/drivers/media/radio/tef6862.c b/drivers/media/radio/tef6862.c
new file mode 100644
index 000000000..a9319a24c
--- /dev/null
+++ b/drivers/media/radio/tef6862.c
@@ -0,0 +1,210 @@
+/*
+ * tef6862.c Philips TEF6862 Car Radio Enhanced Selectivity Tuner
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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/init.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+
+#define DRIVER_NAME "tef6862"
+
+#define FREQ_MUL 16000
+
+#define TEF6862_LO_FREQ (875U * FREQ_MUL / 10)
+#define TEF6862_HI_FREQ (108U * FREQ_MUL)
+
+/* Write mode sub addresses */
+#define WM_SUB_BANDWIDTH	0x0
+#define WM_SUB_PLLM		0x1
+#define WM_SUB_PLLL		0x2
+#define WM_SUB_DAA		0x3
+#define WM_SUB_AGC		0x4
+#define WM_SUB_BAND		0x5
+#define WM_SUB_CONTROL		0x6
+#define WM_SUB_LEVEL		0x7
+#define WM_SUB_IFCF		0x8
+#define WM_SUB_IFCAP		0x9
+#define WM_SUB_ACD		0xA
+#define WM_SUB_TEST		0xF
+
+/* Different modes of the MSA register */
+#define MSA_MODE_BUFFER		0x0
+#define MSA_MODE_PRESET		0x1
+#define MSA_MODE_SEARCH		0x2
+#define MSA_MODE_AF_UPDATE	0x3
+#define MSA_MODE_JUMP		0x4
+#define MSA_MODE_CHECK		0x5
+#define MSA_MODE_LOAD		0x6
+#define MSA_MODE_END		0x7
+#define MSA_MODE_SHIFT		5
+
+struct tef6862_state {
+	struct v4l2_subdev sd;
+	unsigned long freq;
+};
+
+static inline struct tef6862_state *to_state(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct tef6862_state, sd);
+}
+
+static u16 tef6862_sigstr(struct i2c_client *client)
+{
+	u8 buf[4];
+	int err = i2c_master_recv(client, buf, sizeof(buf));
+	if (err == sizeof(buf))
+		return buf[3] << 8;
+	return 0;
+}
+
+static int tef6862_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v)
+{
+	if (v->index > 0)
+		return -EINVAL;
+
+	/* only support FM for now */
+	strlcpy(v->name, "FM", sizeof(v->name));
+	v->type = V4L2_TUNER_RADIO;
+	v->rangelow = TEF6862_LO_FREQ;
+	v->rangehigh = TEF6862_HI_FREQ;
+	v->rxsubchans = V4L2_TUNER_SUB_MONO;
+	v->capability = V4L2_TUNER_CAP_LOW;
+	v->audmode = V4L2_TUNER_MODE_STEREO;
+	v->signal = tef6862_sigstr(v4l2_get_subdevdata(sd));
+
+	return 0;
+}
+
+static int tef6862_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v)
+{
+	return v->index ? -EINVAL : 0;
+}
+
+static int tef6862_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f)
+{
+	struct tef6862_state *state = to_state(sd);
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+	unsigned freq = f->frequency;
+	u16 pll;
+	u8 i2cmsg[3];
+	int err;
+
+	if (f->tuner != 0)
+		return -EINVAL;
+
+	freq = clamp(freq, TEF6862_LO_FREQ, TEF6862_HI_FREQ);
+	pll = 1964 + ((freq - TEF6862_LO_FREQ) * 20) / FREQ_MUL;
+	i2cmsg[0] = (MSA_MODE_PRESET << MSA_MODE_SHIFT) | WM_SUB_PLLM;
+	i2cmsg[1] = (pll >> 8) & 0xff;
+	i2cmsg[2] = pll & 0xff;
+
+	err = i2c_master_send(client, i2cmsg, sizeof(i2cmsg));
+	if (err != sizeof(i2cmsg))
+		return err < 0 ? err : -EIO;
+
+	state->freq = freq;
+	return 0;
+}
+
+static int tef6862_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
+{
+	struct tef6862_state *state = to_state(sd);
+
+	if (f->tuner != 0)
+		return -EINVAL;
+	f->type = V4L2_TUNER_RADIO;
+	f->frequency = state->freq;
+	return 0;
+}
+
+static const struct v4l2_subdev_tuner_ops tef6862_tuner_ops = {
+	.g_tuner = tef6862_g_tuner,
+	.s_tuner = tef6862_s_tuner,
+	.s_frequency = tef6862_s_frequency,
+	.g_frequency = tef6862_g_frequency,
+};
+
+static const struct v4l2_subdev_ops tef6862_ops = {
+	.tuner = &tef6862_tuner_ops,
+};
+
+/*
+ * Generic i2c probe
+ * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
+ */
+
+static int tef6862_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct tef6862_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%02x (%s)\n",
+			client->addr << 1, client->adapter->name);
+
+	state = kzalloc(sizeof(struct tef6862_state), GFP_KERNEL);
+	if (state == NULL)
+		return -ENOMEM;
+	state->freq = TEF6862_LO_FREQ;
+
+	sd = &state->sd;
+	v4l2_i2c_subdev_init(sd, client, &tef6862_ops);
+
+	return 0;
+}
+
+static int tef6862_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 tef6862_id[] = {
+	{DRIVER_NAME, 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(i2c, tef6862_id);
+
+static struct i2c_driver tef6862_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= DRIVER_NAME,
+	},
+	.probe		= tef6862_probe,
+	.remove		= tef6862_remove,
+	.id_table	= tef6862_id,
+};
+
+module_i2c_driver(tef6862_driver);
+
+MODULE_DESCRIPTION("TEF6862 Car Radio Enhanced Selectivity Tuner");
+MODULE_AUTHOR("Mocean Laboratories");
+MODULE_LICENSE("GPL v2");