Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 529 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-tea5764.c b/drivers/media/radio/radio-tea5764.c
new file mode 100644
index 0000000000..14e7dd3889
--- /dev/null
+++ b/drivers/media/radio/radio-tea5764.c
@@ -0,0 +1,529 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * driver/media/radio/radio-tea5764.c
+ *
+ * Driver for TEA5764 radio chip for linux 2.6.
+ * This driver is for TEA5764 chip from NXP, used in EZX phones from Motorola.
+ * The I2C protocol is used for communicate with chip.
+ *
+ * Based in radio-tea5761.c Copyright (C) 2005 Nokia Corporation
+ *
+ *  Copyright (c) 2008 Fabio Belavenuto <belavenuto@gmail.com>
+ *
+ * History:
+ * 2008-12-06   Fabio Belavenuto <belavenuto@gmail.com>
+ *              initial code
+ *
+ * TODO:
+ *  add platform_data support for IRQs platform dependencies
+ *  add RDS support
+ */
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>			/* Initdata			*/
+#include <linux/videodev2.h>		/* kernel radio structs		*/
+#include <linux/i2c.h>			/* I2C				*/
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+
+#define DRIVER_VERSION	"0.0.2"
+
+#define DRIVER_AUTHOR	"Fabio Belavenuto <belavenuto@gmail.com>"
+#define DRIVER_DESC	"A driver for the TEA5764 radio chip for EZX Phones."
+
+#define PINFO(format, ...)\
+	printk(KERN_INFO KBUILD_MODNAME ": "\
+		DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
+#define PWARN(format, ...)\
+	printk(KERN_WARNING KBUILD_MODNAME ": "\
+		DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
+# define PDEBUG(format, ...)\
+	printk(KERN_DEBUG KBUILD_MODNAME ": "\
+		DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
+
+/* Frequency limits in MHz -- these are European values.  For Japanese
+devices, that would be 76000 and 91000.  */
+#define FREQ_MIN  87500U
+#define FREQ_MAX 108000U
+#define FREQ_MUL 16
+
+/* TEA5764 registers */
+#define TEA5764_MANID		0x002b
+#define TEA5764_CHIPID		0x5764
+
+#define TEA5764_INTREG_BLMSK	0x0001
+#define TEA5764_INTREG_FRRMSK	0x0002
+#define TEA5764_INTREG_LEVMSK	0x0008
+#define TEA5764_INTREG_IFMSK	0x0010
+#define TEA5764_INTREG_BLMFLAG	0x0100
+#define TEA5764_INTREG_FRRFLAG	0x0200
+#define TEA5764_INTREG_LEVFLAG	0x0800
+#define TEA5764_INTREG_IFFLAG	0x1000
+
+#define TEA5764_FRQSET_SUD	0x8000
+#define TEA5764_FRQSET_SM	0x4000
+
+#define TEA5764_TNCTRL_PUPD1	0x8000
+#define TEA5764_TNCTRL_PUPD0	0x4000
+#define TEA5764_TNCTRL_BLIM	0x2000
+#define TEA5764_TNCTRL_SWPM	0x1000
+#define TEA5764_TNCTRL_IFCTC	0x0800
+#define TEA5764_TNCTRL_AFM	0x0400
+#define TEA5764_TNCTRL_SMUTE	0x0200
+#define TEA5764_TNCTRL_SNC	0x0100
+#define TEA5764_TNCTRL_MU	0x0080
+#define TEA5764_TNCTRL_SSL1	0x0040
+#define TEA5764_TNCTRL_SSL0	0x0020
+#define TEA5764_TNCTRL_HLSI	0x0010
+#define TEA5764_TNCTRL_MST	0x0008
+#define TEA5764_TNCTRL_SWP	0x0004
+#define TEA5764_TNCTRL_DTC	0x0002
+#define TEA5764_TNCTRL_AHLSI	0x0001
+
+#define TEA5764_TUNCHK_LEVEL(x)	(((x) & 0x00F0) >> 4)
+#define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9)
+#define TEA5764_TUNCHK_TUNTO	0x0100
+#define TEA5764_TUNCHK_LD	0x0008
+#define TEA5764_TUNCHK_STEREO	0x0004
+
+#define TEA5764_TESTREG_TRIGFR	0x0800
+
+struct tea5764_regs {
+	u16 intreg;				/* INTFLAG & INTMSK */
+	u16 frqset;				/* FRQSETMSB & FRQSETLSB */
+	u16 tnctrl;				/* TNCTRL1 & TNCTRL2 */
+	u16 frqchk;				/* FRQCHKMSB & FRQCHKLSB */
+	u16 tunchk;				/* IFCHK & LEVCHK */
+	u16 testreg;				/* TESTBITS & TESTMODE */
+	u16 rdsstat;				/* RDSSTAT1 & RDSSTAT2 */
+	u16 rdslb;				/* RDSLBMSB & RDSLBLSB */
+	u16 rdspb;				/* RDSPBMSB & RDSPBLSB */
+	u16 rdsbc;				/* RDSBBC & RDSGBC */
+	u16 rdsctrl;				/* RDSCTRL1 & RDSCTRL2 */
+	u16 rdsbbl;				/* PAUSEDET & RDSBBL */
+	u16 manid;				/* MANID1 & MANID2 */
+	u16 chipid;				/* CHIPID1 & CHIPID2 */
+} __attribute__ ((packed));
+
+struct tea5764_write_regs {
+	u8 intreg;				/* INTMSK */
+	__be16 frqset;				/* FRQSETMSB & FRQSETLSB */
+	__be16 tnctrl;				/* TNCTRL1 & TNCTRL2 */
+	__be16 testreg;				/* TESTBITS & TESTMODE */
+	__be16 rdsctrl;				/* RDSCTRL1 & RDSCTRL2 */
+	__be16 rdsbbl;				/* PAUSEDET & RDSBBL */
+} __attribute__ ((packed));
+
+#ifdef CONFIG_RADIO_TEA5764_XTAL
+#define RADIO_TEA5764_XTAL 1
+#else
+#define RADIO_TEA5764_XTAL 0
+#endif
+
+static int radio_nr = -1;
+static int use_xtal = RADIO_TEA5764_XTAL;
+
+struct tea5764_device {
+	struct v4l2_device		v4l2_dev;
+	struct v4l2_ctrl_handler	ctrl_handler;
+	struct i2c_client		*i2c_client;
+	struct video_device		vdev;
+	struct tea5764_regs		regs;
+	struct mutex			mutex;
+};
+
+/* I2C code related */
+static int tea5764_i2c_read(struct tea5764_device *radio)
+{
+	int i;
+	u16 *p = (u16 *) &radio->regs;
+
+	struct i2c_msg msgs[1] = {
+		{	.addr = radio->i2c_client->addr,
+			.flags = I2C_M_RD,
+			.len = sizeof(radio->regs),
+			.buf = (void *)&radio->regs
+		},
+	};
+	if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
+		return -EIO;
+	for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++)
+		p[i] = __be16_to_cpu((__force __be16)p[i]);
+
+	return 0;
+}
+
+static int tea5764_i2c_write(struct tea5764_device *radio)
+{
+	struct tea5764_write_regs wr;
+	struct tea5764_regs *r = &radio->regs;
+	struct i2c_msg msgs[1] = {
+		{
+			.addr = radio->i2c_client->addr,
+			.len = sizeof(wr),
+			.buf = (void *)&wr
+		},
+	};
+	wr.intreg  = r->intreg & 0xff;
+	wr.frqset  = __cpu_to_be16(r->frqset);
+	wr.tnctrl  = __cpu_to_be16(r->tnctrl);
+	wr.testreg = __cpu_to_be16(r->testreg);
+	wr.rdsctrl = __cpu_to_be16(r->rdsctrl);
+	wr.rdsbbl  = __cpu_to_be16(r->rdsbbl);
+	if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
+		return -EIO;
+	return 0;
+}
+
+static void tea5764_power_up(struct tea5764_device *radio)
+{
+	struct tea5764_regs *r = &radio->regs;
+
+	if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) {
+		r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU |
+			       TEA5764_TNCTRL_HLSI);
+		if (!use_xtal)
+			r->testreg |= TEA5764_TESTREG_TRIGFR;
+		else
+			r->testreg &= ~TEA5764_TESTREG_TRIGFR;
+
+		r->tnctrl |= TEA5764_TNCTRL_PUPD0;
+		tea5764_i2c_write(radio);
+	}
+}
+
+static void tea5764_power_down(struct tea5764_device *radio)
+{
+	struct tea5764_regs *r = &radio->regs;
+
+	if (r->tnctrl & TEA5764_TNCTRL_PUPD0) {
+		r->tnctrl &= ~TEA5764_TNCTRL_PUPD0;
+		tea5764_i2c_write(radio);
+	}
+}
+
+static void tea5764_set_freq(struct tea5764_device *radio, int freq)
+{
+	struct tea5764_regs *r = &radio->regs;
+
+	/* formula: (freq [+ or -] 225000) / 8192 */
+	if (r->tnctrl & TEA5764_TNCTRL_HLSI)
+		r->frqset = (freq + 225000) / 8192;
+	else
+		r->frqset = (freq - 225000) / 8192;
+}
+
+static int tea5764_get_freq(struct tea5764_device *radio)
+{
+	struct tea5764_regs *r = &radio->regs;
+
+	if (r->tnctrl & TEA5764_TNCTRL_HLSI)
+		return (r->frqchk * 8192) - 225000;
+	else
+		return (r->frqchk * 8192) + 225000;
+}
+
+/* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
+static void tea5764_tune(struct tea5764_device *radio, int freq)
+{
+	tea5764_set_freq(radio, freq);
+	if (tea5764_i2c_write(radio))
+		PWARN("Could not set frequency!");
+}
+
+static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode)
+{
+	struct tea5764_regs *r = &radio->regs;
+	int tnctrl = r->tnctrl;
+
+	if (audmode == V4L2_TUNER_MODE_MONO)
+		r->tnctrl |= TEA5764_TNCTRL_MST;
+	else
+		r->tnctrl &= ~TEA5764_TNCTRL_MST;
+	if (tnctrl != r->tnctrl)
+		tea5764_i2c_write(radio);
+}
+
+static int tea5764_get_audout_mode(struct tea5764_device *radio)
+{
+	struct tea5764_regs *r = &radio->regs;
+
+	if (r->tnctrl & TEA5764_TNCTRL_MST)
+		return V4L2_TUNER_MODE_MONO;
+	else
+		return V4L2_TUNER_MODE_STEREO;
+}
+
+static void tea5764_mute(struct tea5764_device *radio, int on)
+{
+	struct tea5764_regs *r = &radio->regs;
+	int tnctrl = r->tnctrl;
+
+	if (on)
+		r->tnctrl |= TEA5764_TNCTRL_MU;
+	else
+		r->tnctrl &= ~TEA5764_TNCTRL_MU;
+	if (tnctrl != r->tnctrl)
+		tea5764_i2c_write(radio);
+}
+
+/* V4L2 vidioc */
+static int vidioc_querycap(struct file *file, void  *priv,
+					struct v4l2_capability *v)
+{
+	struct tea5764_device *radio = video_drvdata(file);
+	struct video_device *dev = &radio->vdev;
+
+	strscpy(v->driver, dev->dev.driver->name, sizeof(v->driver));
+	strscpy(v->card, dev->name, sizeof(v->card));
+	snprintf(v->bus_info, sizeof(v->bus_info),
+		 "I2C:%s", dev_name(&dev->dev));
+	return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+				struct v4l2_tuner *v)
+{
+	struct tea5764_device *radio = video_drvdata(file);
+	struct tea5764_regs *r = &radio->regs;
+
+	if (v->index > 0)
+		return -EINVAL;
+
+	strscpy(v->name, "FM", sizeof(v->name));
+	v->type = V4L2_TUNER_RADIO;
+	tea5764_i2c_read(radio);
+	v->rangelow   = FREQ_MIN * FREQ_MUL;
+	v->rangehigh  = FREQ_MAX * FREQ_MUL;
+	v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
+	if (r->tunchk & TEA5764_TUNCHK_STEREO)
+		v->rxsubchans = V4L2_TUNER_SUB_STEREO;
+	else
+		v->rxsubchans = V4L2_TUNER_SUB_MONO;
+	v->audmode = tea5764_get_audout_mode(radio);
+	v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf;
+	v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk);
+
+	return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+				const struct v4l2_tuner *v)
+{
+	struct tea5764_device *radio = video_drvdata(file);
+
+	if (v->index > 0)
+		return -EINVAL;
+
+	tea5764_set_audout_mode(radio, v->audmode);
+	return 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+				const struct v4l2_frequency *f)
+{
+	struct tea5764_device *radio = video_drvdata(file);
+	unsigned freq = f->frequency;
+
+	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+		return -EINVAL;
+	if (freq == 0) {
+		/* We special case this as a power down control. */
+		tea5764_power_down(radio);
+		/* Yes, that's what is returned in this case. This
+		   whole special case is non-compliant and should really
+		   be replaced with something better, but changing this
+		   might well break code that depends on this behavior.
+		   So we keep it as-is. */
+		return -EINVAL;
+	}
+	freq = clamp(freq, FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL);
+	tea5764_power_up(radio);
+	tea5764_tune(radio, (freq * 125) / 2);
+	return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+				struct v4l2_frequency *f)
+{
+	struct tea5764_device *radio = video_drvdata(file);
+	struct tea5764_regs *r = &radio->regs;
+
+	if (f->tuner != 0)
+		return -EINVAL;
+	tea5764_i2c_read(radio);
+	f->type = V4L2_TUNER_RADIO;
+	if (r->tnctrl & TEA5764_TNCTRL_PUPD0)
+		f->frequency = (tea5764_get_freq(radio) * 2) / 125;
+	else
+		f->frequency = 0;
+
+	return 0;
+}
+
+static int tea5764_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct tea5764_device *radio =
+		container_of(ctrl->handler, struct tea5764_device, ctrl_handler);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		tea5764_mute(radio, ctrl->val);
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static const struct v4l2_ctrl_ops tea5764_ctrl_ops = {
+	.s_ctrl = tea5764_s_ctrl,
+};
+
+/* File system interface */
+static const struct v4l2_file_operations tea5764_fops = {
+	.owner		= THIS_MODULE,
+	.open		= v4l2_fh_open,
+	.release	= v4l2_fh_release,
+	.poll		= v4l2_ctrl_poll,
+	.unlocked_ioctl	= video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops tea5764_ioctl_ops = {
+	.vidioc_querycap    = vidioc_querycap,
+	.vidioc_g_tuner     = vidioc_g_tuner,
+	.vidioc_s_tuner     = vidioc_s_tuner,
+	.vidioc_g_frequency = vidioc_g_frequency,
+	.vidioc_s_frequency = vidioc_s_frequency,
+	.vidioc_log_status  = v4l2_ctrl_log_status,
+	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+/* V4L2 interface */
+static const struct video_device tea5764_radio_template = {
+	.name		= "TEA5764 FM-Radio",
+	.fops           = &tea5764_fops,
+	.ioctl_ops	= &tea5764_ioctl_ops,
+	.release	= video_device_release_empty,
+};
+
+/* I2C probe: check if the device exists and register with v4l if it is */
+static int tea5764_i2c_probe(struct i2c_client *client)
+{
+	struct tea5764_device *radio;
+	struct v4l2_device *v4l2_dev;
+	struct v4l2_ctrl_handler *hdl;
+	struct tea5764_regs *r;
+	int ret;
+
+	PDEBUG("probe");
+	radio = kzalloc(sizeof(struct tea5764_device), GFP_KERNEL);
+	if (!radio)
+		return -ENOMEM;
+
+	v4l2_dev = &radio->v4l2_dev;
+	ret = v4l2_device_register(&client->dev, v4l2_dev);
+	if (ret < 0) {
+		v4l2_err(v4l2_dev, "could not register v4l2_device\n");
+		goto errfr;
+	}
+
+	hdl = &radio->ctrl_handler;
+	v4l2_ctrl_handler_init(hdl, 1);
+	v4l2_ctrl_new_std(hdl, &tea5764_ctrl_ops,
+			V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
+	v4l2_dev->ctrl_handler = hdl;
+	if (hdl->error) {
+		ret = hdl->error;
+		v4l2_err(v4l2_dev, "Could not register controls\n");
+		goto errunreg;
+	}
+
+	mutex_init(&radio->mutex);
+	radio->i2c_client = client;
+	ret = tea5764_i2c_read(radio);
+	if (ret)
+		goto errunreg;
+	r = &radio->regs;
+	PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid);
+	if (r->chipid != TEA5764_CHIPID ||
+		(r->manid & 0x0fff) != TEA5764_MANID) {
+		PWARN("This chip is not a TEA5764!");
+		ret = -EINVAL;
+		goto errunreg;
+	}
+
+	radio->vdev = tea5764_radio_template;
+
+	i2c_set_clientdata(client, radio);
+	video_set_drvdata(&radio->vdev, radio);
+	radio->vdev.lock = &radio->mutex;
+	radio->vdev.v4l2_dev = v4l2_dev;
+	radio->vdev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+
+	/* initialize and power off the chip */
+	tea5764_i2c_read(radio);
+	tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO);
+	tea5764_mute(radio, 1);
+	tea5764_power_down(radio);
+
+	ret = video_register_device(&radio->vdev, VFL_TYPE_RADIO, radio_nr);
+	if (ret < 0) {
+		PWARN("Could not register video device!");
+		goto errunreg;
+	}
+
+	PINFO("registered.");
+	return 0;
+errunreg:
+	v4l2_ctrl_handler_free(hdl);
+	v4l2_device_unregister(v4l2_dev);
+errfr:
+	kfree(radio);
+	return ret;
+}
+
+static void tea5764_i2c_remove(struct i2c_client *client)
+{
+	struct tea5764_device *radio = i2c_get_clientdata(client);
+
+	PDEBUG("remove");
+	if (radio) {
+		tea5764_power_down(radio);
+		video_unregister_device(&radio->vdev);
+		v4l2_ctrl_handler_free(&radio->ctrl_handler);
+		v4l2_device_unregister(&radio->v4l2_dev);
+		kfree(radio);
+	}
+}
+
+/* I2C subsystem interface */
+static const struct i2c_device_id tea5764_id[] = {
+	{ "radio-tea5764", 0 },
+	{ }					/* Terminating entry */
+};
+MODULE_DEVICE_TABLE(i2c, tea5764_id);
+
+static struct i2c_driver tea5764_i2c_driver = {
+	.driver = {
+		.name = "radio-tea5764",
+	},
+	.probe = tea5764_i2c_probe,
+	.remove = tea5764_i2c_remove,
+	.id_table = tea5764_id,
+};
+
+module_i2c_driver(tea5764_i2c_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRIVER_VERSION);
+
+module_param(use_xtal, int, 0);
+MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board");
+module_param(radio_nr, int, 0);
+MODULE_PARM_DESC(radio_nr, "video4linux device number to use");