diff options
Diffstat (limited to 'drivers/media/radio/si4713')
| -rw-r--r-- | drivers/media/radio/si4713/Kconfig | 40 | ||||
| -rw-r--r-- | drivers/media/radio/si4713/Makefile | 7 | ||||
| -rw-r--r-- | drivers/media/radio/si4713/radio-platform-si4713.c | 246 | ||||
| -rw-r--r-- | drivers/media/radio/si4713/radio-usb-si4713.c | 540 | ||||
| -rw-r--r-- | drivers/media/radio/si4713/si4713.c | 1557 | ||||
| -rw-r--r-- | drivers/media/radio/si4713/si4713.h | 240 |
6 files changed, 2630 insertions, 0 deletions
diff --git a/drivers/media/radio/si4713/Kconfig b/drivers/media/radio/si4713/Kconfig new file mode 100644 index 000000000000..a7c3ba85d12b --- /dev/null +++ b/drivers/media/radio/si4713/Kconfig @@ -0,0 +1,40 @@ +config USB_SI4713 + tristate "Silicon Labs Si4713 FM Radio Transmitter support with USB" + depends on USB && RADIO_SI4713 + select SI4713 + ---help--- + This is a driver for USB devices with the Silicon Labs SI4713 + chip. Currently these devices are known to work. + - 10c4:8244: Silicon Labs FM Transmitter USB device. + + Say Y here if you want to connect this type of radio to your + computer's USB port. + + To compile this driver as a module, choose M here: the + module will be called radio-usb-si4713. + +config PLATFORM_SI4713 + tristate "Silicon Labs Si4713 FM Radio Transmitter support with I2C" + depends on I2C && RADIO_SI4713 + select SI4713 + ---help--- + This is a driver for I2C devices with the Silicon Labs SI4713 + chip. + + Say Y here if you want to connect this type of radio to your + computer's I2C port. + + To compile this driver as a module, choose M here: the + module will be called radio-platform-si4713. + +config I2C_SI4713 + tristate "Silicon Labs Si4713 FM Radio Transmitter support" + depends on I2C && RADIO_SI4713 + ---help--- + Say Y here if you want support to Si4713 FM Radio Transmitter. + This device can transmit audio through FM. It can transmit + RDS and RBDS signals as well. This module is the v4l2 radio + interface for the i2c driver of this device. + + To compile this driver as a module, choose M here: the + module will be called si4713. diff --git a/drivers/media/radio/si4713/Makefile b/drivers/media/radio/si4713/Makefile new file mode 100644 index 000000000000..ddaaf925e883 --- /dev/null +++ b/drivers/media/radio/si4713/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for radios with Silicon Labs Si4713 FM Radio Transmitters +# + +obj-$(CONFIG_I2C_SI4713) += si4713.o +obj-$(CONFIG_USB_SI4713) += radio-usb-si4713.o +obj-$(CONFIG_PLATFORM_SI4713) += radio-platform-si4713.o diff --git a/drivers/media/radio/si4713/radio-platform-si4713.c b/drivers/media/radio/si4713/radio-platform-si4713.c new file mode 100644 index 000000000000..ba4cfc946868 --- /dev/null +++ b/drivers/media/radio/si4713/radio-platform-si4713.c @@ -0,0 +1,246 @@ +/* + * drivers/media/radio/radio-si4713.c + * + * Platform Driver for Silicon Labs Si4713 FM Radio Transmitter: + * + * Copyright (c) 2008 Instituto Nokia de Tecnologia - INdT + * Contact: Eduardo Valentin <eduardo.valentin@nokia.com> + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/i2c.h> +#include <linux/videodev2.h> +#include <linux/slab.h> +#include <media/v4l2-device.h> +#include <media/v4l2-common.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-fh.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-event.h> +#include <media/radio-si4713.h> + +/* module parameters */ +static int radio_nr = -1; /* radio device minor (-1 ==> auto assign) */ +module_param(radio_nr, int, 0); +MODULE_PARM_DESC(radio_nr, + "Minor number for radio device (-1 ==> auto assign)"); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>"); +MODULE_DESCRIPTION("Platform driver for Si4713 FM Radio Transmitter"); +MODULE_VERSION("0.0.1"); +MODULE_ALIAS("platform:radio-si4713"); + +/* Driver state struct */ +struct radio_si4713_device { + struct v4l2_device v4l2_dev; + struct video_device radio_dev; + struct mutex lock; +}; + +/* radio_si4713_fops - file operations interface */ +static const struct v4l2_file_operations radio_si4713_fops = { + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = v4l2_fh_release, + .poll = v4l2_ctrl_poll, + /* Note: locking is done at the subdev level in the i2c driver. */ + .unlocked_ioctl = video_ioctl2, +}; + +/* Video4Linux Interface */ + +/* radio_si4713_querycap - query device capabilities */ +static int radio_si4713_querycap(struct file *file, void *priv, + struct v4l2_capability *capability) +{ + strlcpy(capability->driver, "radio-si4713", sizeof(capability->driver)); + strlcpy(capability->card, "Silicon Labs Si4713 Modulator", + sizeof(capability->card)); + strlcpy(capability->bus_info, "platform:radio-si4713", + sizeof(capability->bus_info)); + capability->device_caps = V4L2_CAP_MODULATOR | V4L2_CAP_RDS_OUTPUT; + capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS; + + return 0; +} + +/* + * v4l2 ioctl call backs. + * we are just a wrapper for v4l2_sub_devs. + */ +static inline struct v4l2_device *get_v4l2_dev(struct file *file) +{ + return &((struct radio_si4713_device *)video_drvdata(file))->v4l2_dev; +} + +static int radio_si4713_g_modulator(struct file *file, void *p, + struct v4l2_modulator *vm) +{ + return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, + g_modulator, vm); +} + +static int radio_si4713_s_modulator(struct file *file, void *p, + const struct v4l2_modulator *vm) +{ + return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, + s_modulator, vm); +} + +static int radio_si4713_g_frequency(struct file *file, void *p, + struct v4l2_frequency *vf) +{ + return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, + g_frequency, vf); +} + +static int radio_si4713_s_frequency(struct file *file, void *p, + const struct v4l2_frequency *vf) +{ + return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, + s_frequency, vf); +} + +static long radio_si4713_default(struct file *file, void *p, + bool valid_prio, unsigned int cmd, void *arg) +{ + return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core, + ioctl, cmd, arg); +} + +static struct v4l2_ioctl_ops radio_si4713_ioctl_ops = { + .vidioc_querycap = radio_si4713_querycap, + .vidioc_g_modulator = radio_si4713_g_modulator, + .vidioc_s_modulator = radio_si4713_s_modulator, + .vidioc_g_frequency = radio_si4713_g_frequency, + .vidioc_s_frequency = radio_si4713_s_frequency, + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, + .vidioc_default = radio_si4713_default, +}; + +/* radio_si4713_vdev_template - video device interface */ +static struct video_device radio_si4713_vdev_template = { + .fops = &radio_si4713_fops, + .name = "radio-si4713", + .release = video_device_release_empty, + .ioctl_ops = &radio_si4713_ioctl_ops, + .vfl_dir = VFL_DIR_TX, +}; + +/* Platform driver interface */ +/* radio_si4713_pdriver_probe - probe for the device */ +static int radio_si4713_pdriver_probe(struct platform_device *pdev) +{ + struct radio_si4713_platform_data *pdata = pdev->dev.platform_data; + struct radio_si4713_device *rsdev; + struct i2c_adapter *adapter; + struct v4l2_subdev *sd; + int rval = 0; + + if (!pdata) { + dev_err(&pdev->dev, "Cannot proceed without platform data.\n"); + rval = -EINVAL; + goto exit; + } + + rsdev = devm_kzalloc(&pdev->dev, sizeof(*rsdev), GFP_KERNEL); + if (!rsdev) { + dev_err(&pdev->dev, "Failed to alloc video device.\n"); + rval = -ENOMEM; + goto exit; + } + mutex_init(&rsdev->lock); + + rval = v4l2_device_register(&pdev->dev, &rsdev->v4l2_dev); + if (rval) { + dev_err(&pdev->dev, "Failed to register v4l2 device.\n"); + goto exit; + } + + adapter = i2c_get_adapter(pdata->i2c_bus); + if (!adapter) { + dev_err(&pdev->dev, "Cannot get i2c adapter %d\n", + pdata->i2c_bus); + rval = -ENODEV; + goto unregister_v4l2_dev; + } + + sd = v4l2_i2c_new_subdev_board(&rsdev->v4l2_dev, adapter, + pdata->subdev_board_info, NULL); + if (!sd) { + dev_err(&pdev->dev, "Cannot get v4l2 subdevice\n"); + rval = -ENODEV; + goto put_adapter; + } + + rsdev->radio_dev = radio_si4713_vdev_template; + rsdev->radio_dev.v4l2_dev = &rsdev->v4l2_dev; + rsdev->radio_dev.ctrl_handler = sd->ctrl_handler; + set_bit(V4L2_FL_USE_FH_PRIO, &rsdev->radio_dev.flags); + /* Serialize all access to the si4713 */ + rsdev->radio_dev.lock = &rsdev->lock; + video_set_drvdata(&rsdev->radio_dev, rsdev); + if (video_register_device(&rsdev->radio_dev, VFL_TYPE_RADIO, radio_nr)) { + dev_err(&pdev->dev, "Could not register video device.\n"); + rval = -EIO; + goto put_adapter; + } + dev_info(&pdev->dev, "New device successfully probed\n"); + + goto exit; + +put_adapter: + i2c_put_adapter(adapter); +unregister_v4l2_dev: + v4l2_device_unregister(&rsdev->v4l2_dev); +exit: + return rval; +} + +/* radio_si4713_pdriver_remove - remove the device */ +static int radio_si4713_pdriver_remove(struct platform_device *pdev) +{ + struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev); + struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next, + struct v4l2_subdev, list); + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct radio_si4713_device *rsdev; + + rsdev = container_of(v4l2_dev, struct radio_si4713_device, v4l2_dev); + video_unregister_device(&rsdev->radio_dev); + i2c_put_adapter(client->adapter); + v4l2_device_unregister(&rsdev->v4l2_dev); + + return 0; +} + +static struct platform_driver radio_si4713_pdriver = { + .driver = { + .name = "radio-si4713", + .owner = THIS_MODULE, + }, + .probe = radio_si4713_pdriver_probe, + .remove = radio_si4713_pdriver_remove, +}; + +module_platform_driver(radio_si4713_pdriver); diff --git a/drivers/media/radio/si4713/radio-usb-si4713.c b/drivers/media/radio/si4713/radio-usb-si4713.c new file mode 100644 index 000000000000..779855b74bcd --- /dev/null +++ b/drivers/media/radio/si4713/radio-usb-si4713.c @@ -0,0 +1,540 @@ +/* + * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. + * All rights reserved. + * + * This program is free software; you may redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* kernel includes */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/input.h> +#include <linux/mutex.h> +#include <linux/i2c.h> +/* V4l includes */ +#include <linux/videodev2.h> +#include <media/v4l2-common.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-event.h> +#include <media/si4713.h> + +#include "si4713.h" + +/* driver and module definitions */ +MODULE_AUTHOR("Dinesh Ram <dinesh.ram@cern.ch>"); +MODULE_DESCRIPTION("Si4713 FM Transmitter USB driver"); +MODULE_LICENSE("GPL v2"); + +/* The Device announces itself as Cygnal Integrated Products, Inc. */ +#define USB_SI4713_VENDOR 0x10c4 +#define USB_SI4713_PRODUCT 0x8244 + +#define BUFFER_LENGTH 64 +#define USB_TIMEOUT 1000 +#define USB_RESP_TIMEOUT 50000 + +/* USB Device ID List */ +static struct usb_device_id usb_si4713_usb_device_table[] = { + {USB_DEVICE_AND_INTERFACE_INFO(USB_SI4713_VENDOR, USB_SI4713_PRODUCT, + USB_CLASS_HID, 0, 0) }, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE(usb, usb_si4713_usb_device_table); + +struct si4713_usb_device { + struct usb_device *usbdev; + struct usb_interface *intf; + struct video_device vdev; + struct v4l2_device v4l2_dev; + struct v4l2_subdev *v4l2_subdev; + struct mutex lock; + struct i2c_adapter i2c_adapter; + + u8 *buffer; +}; + +static inline struct si4713_usb_device *to_si4713_dev(struct v4l2_device *v4l2_dev) +{ + return container_of(v4l2_dev, struct si4713_usb_device, v4l2_dev); +} + +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *v) +{ + struct si4713_usb_device *radio = video_drvdata(file); + + strlcpy(v->driver, "radio-usb-si4713", sizeof(v->driver)); + strlcpy(v->card, "Si4713 FM Transmitter", sizeof(v->card)); + usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info)); + v->device_caps = V4L2_CAP_MODULATOR | V4L2_CAP_RDS_OUTPUT; + v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; + + return 0; +} + +static int vidioc_g_modulator(struct file *file, void *priv, + struct v4l2_modulator *vm) +{ + struct si4713_usb_device *radio = video_drvdata(file); + + return v4l2_subdev_call(radio->v4l2_subdev, tuner, g_modulator, vm); +} + +static int vidioc_s_modulator(struct file *file, void *priv, + const struct v4l2_modulator *vm) +{ + struct si4713_usb_device *radio = video_drvdata(file); + + return v4l2_subdev_call(radio->v4l2_subdev, tuner, s_modulator, vm); +} + +static int vidioc_s_frequency(struct file *file, void *priv, + const struct v4l2_frequency *vf) +{ + struct si4713_usb_device *radio = video_drvdata(file); + + return v4l2_subdev_call(radio->v4l2_subdev, tuner, s_frequency, vf); +} + +static int vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *vf) +{ + struct si4713_usb_device *radio = video_drvdata(file); + + return v4l2_subdev_call(radio->v4l2_subdev, tuner, g_frequency, vf); +} + +static const struct v4l2_ioctl_ops usb_si4713_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_g_modulator = vidioc_g_modulator, + .vidioc_s_modulator = vidioc_s_modulator, + .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, +}; + +/* File system interface */ +static const struct v4l2_file_operations usb_si4713_fops = { + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = v4l2_fh_release, + .poll = v4l2_ctrl_poll, + .unlocked_ioctl = video_ioctl2, +}; + +static void usb_si4713_video_device_release(struct v4l2_device *v4l2_dev) +{ + struct si4713_usb_device *radio = to_si4713_dev(v4l2_dev); + struct i2c_adapter *adapter = &radio->i2c_adapter; + + i2c_del_adapter(adapter); + v4l2_device_unregister(&radio->v4l2_dev); + kfree(radio->buffer); + kfree(radio); +} + +/* + * This command sequence emulates the behaviour of the Windows driver. + * The structure of these commands was determined by sniffing the + * usb traffic of the device during startup. + * Most likely, these commands make some queries to the device. + * Commands are sent to enquire parameters like the bus mode, + * component revision, boot mode, the device serial number etc. + * + * These commands are necessary to be sent in this order during startup. + * The device fails to powerup if these commands are not sent. + * + * The complete list of startup commands is given in the start_seq table below. + */ +static int si4713_send_startup_command(struct si4713_usb_device *radio) +{ + unsigned long until_jiffies = jiffies + usecs_to_jiffies(USB_RESP_TIMEOUT) + 1; + u8 *buffer = radio->buffer; + int retval; + + /* send the command */ + retval = usb_control_msg(radio->usbdev, usb_sndctrlpipe(radio->usbdev, 0), + 0x09, 0x21, 0x033f, 0, radio->buffer, + BUFFER_LENGTH, USB_TIMEOUT); + if (retval < 0) + return retval; + + for (;;) { + /* receive the response */ + retval = usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0), + 0x01, 0xa1, 0x033f, 0, radio->buffer, + BUFFER_LENGTH, USB_TIMEOUT); + if (retval < 0) + return retval; + if (!radio->buffer[1]) { + /* USB traffic sniffing showed that some commands require + * additional checks. */ + switch (buffer[1]) { + case 0x32: + if (radio->buffer[2] == 0) + return 0; + break; + case 0x14: + case 0x12: + if (radio->buffer[2] & SI4713_CTS) + return 0; + break; + case 0x06: + if ((radio->buffer[2] & SI4713_CTS) && radio->buffer[9] == 0x08) + return 0; + break; + default: + return 0; + } + } + if (time_is_before_jiffies(until_jiffies)) + return -EIO; + msleep(3); + } + + return retval; +} + +struct si4713_start_seq_table { + int len; + u8 payload[8]; +}; + +/* + * Some of the startup commands that could be recognized are : + * (0x03): Get serial number of the board (Response : CB000-00-00) + * (0x06, 0x03, 0x03, 0x08, 0x01, 0x0f) : Get Component revision + */ +static struct si4713_start_seq_table start_seq[] = { + + { 1, { 0x03 } }, + { 2, { 0x32, 0x7f } }, + { 6, { 0x06, 0x03, 0x03, 0x08, 0x01, 0x0f } }, + { 2, { 0x14, 0x02 } }, + { 2, { 0x09, 0x90 } }, + { 3, { 0x08, 0x90, 0xfa } }, + { 2, { 0x36, 0x01 } }, + { 2, { 0x05, 0x03 } }, + { 7, { 0x06, 0x00, 0x06, 0x0e, 0x01, 0x0f, 0x05 } }, + { 1, { 0x12 } }, + /* Commands that are sent after pressing the 'Initialize' + button in the windows application */ + { 1, { 0x03 } }, + { 1, { 0x01 } }, + { 2, { 0x09, 0x90 } }, + { 3, { 0x08, 0x90, 0xfa } }, + { 1, { 0x34 } }, + { 2, { 0x35, 0x01 } }, + { 2, { 0x36, 0x01 } }, + { 2, { 0x30, 0x09 } }, + { 4, { 0x30, 0x06, 0x00, 0xe2 } }, + { 3, { 0x31, 0x01, 0x30 } }, + { 3, { 0x31, 0x04, 0x09 } }, + { 2, { 0x05, 0x02 } }, + { 6, { 0x06, 0x03, 0x03, 0x08, 0x01, 0x0f } }, +}; + +static int si4713_start_seq(struct si4713_usb_device *radio) +{ + int retval = 0; + int i; + + radio->buffer[0] = 0x3f; + + for (i = 0; i < ARRAY_SIZE(start_seq); i++) { + int len = start_seq[i].len; + u8 *payload = start_seq[i].payload; + + memcpy(radio->buffer + 1, payload, len); + memset(radio->buffer + len + 1, 0, BUFFER_LENGTH - 1 - len); + retval = si4713_send_startup_command(radio); + } + + return retval; +} + +static struct i2c_board_info si4713_board_info = { + I2C_BOARD_INFO("si4713", SI4713_I2C_ADDR_BUSEN_HIGH), +}; + +struct si4713_command_table { + int command_id; + u8 payload[8]; +}; + +/* + * Structure of a command : + * Byte 1 : 0x3f (always) + * Byte 2 : 0x06 (send a command) + * Byte 3 : Unknown + * Byte 4 : Number of arguments + 1 (for the command byte) + * Byte 5 : Number of response bytes + */ +static struct si4713_command_table command_table[] = { + + { SI4713_CMD_POWER_UP, { 0x00, SI4713_PWUP_NARGS + 1, SI4713_PWUP_NRESP} }, + { SI4713_CMD_GET_REV, { 0x03, 0x01, SI4713_GETREV_NRESP } }, + { SI4713_CMD_POWER_DOWN, { 0x00, 0x01, SI4713_PWDN_NRESP} }, + { SI4713_CMD_SET_PROPERTY, { 0x00, SI4713_SET_PROP_NARGS + 1, SI4713_SET_PROP_NRESP } }, + { SI4713_CMD_GET_PROPERTY, { 0x00, SI4713_GET_PROP_NARGS + 1, SI4713_GET_PROP_NRESP } }, + { SI4713_CMD_TX_TUNE_FREQ, { 0x03, SI4713_TXFREQ_NARGS + 1, SI4713_TXFREQ_NRESP } }, + { SI4713_CMD_TX_TUNE_POWER, { 0x03, SI4713_TXPWR_NARGS + 1, SI4713_TXPWR_NRESP } }, + { SI4713_CMD_TX_TUNE_MEASURE, { 0x03, SI4713_TXMEA_NARGS + 1, SI4713_TXMEA_NRESP } }, + { SI4713_CMD_TX_TUNE_STATUS, { 0x00, SI4713_TXSTATUS_NARGS + 1, SI4713_TXSTATUS_NRESP } }, + { SI4713_CMD_TX_ASQ_STATUS, { 0x03, SI4713_ASQSTATUS_NARGS + 1, SI4713_ASQSTATUS_NRESP } }, + { SI4713_CMD_GET_INT_STATUS, { 0x03, 0x01, SI4713_GET_STATUS_NRESP } }, + { SI4713_CMD_TX_RDS_BUFF, { 0x03, SI4713_RDSBUFF_NARGS + 1, SI4713_RDSBUFF_NRESP } }, + { SI4713_CMD_TX_RDS_PS, { 0x00, SI4713_RDSPS_NARGS + 1, SI4713_RDSPS_NRESP } }, +}; + +static int send_command(struct si4713_usb_device *radio, u8 *payload, char *data, int len) +{ + int retval; + + radio->buffer[0] = 0x3f; + radio->buffer[1] = 0x06; + + memcpy(radio->buffer + 2, payload, 3); + memcpy(radio->buffer + 5, data, len); + memset(radio->buffer + 5 + len, 0, BUFFER_LENGTH - 5 - len); + + /* send the command */ + retval = usb_control_msg(radio->usbdev, usb_sndctrlpipe(radio->usbdev, 0), + 0x09, 0x21, 0x033f, 0, radio->buffer, + BUFFER_LENGTH, USB_TIMEOUT); + + return retval < 0 ? retval : 0; +} + +static int si4713_i2c_read(struct si4713_usb_device *radio, char *data, int len) +{ + unsigned long until_jiffies = jiffies + usecs_to_jiffies(USB_RESP_TIMEOUT) + 1; + int retval; + + /* receive the response */ + for (;;) { + retval = usb_control_msg(radio->usbdev, + usb_rcvctrlpipe(radio->usbdev, 0), + 0x01, 0xa1, 0x033f, 0, radio->buffer, + BUFFER_LENGTH, USB_TIMEOUT); + if (retval < 0) + return retval; + + /* + * Check that we get a valid reply back (buffer[1] == 0) and + * that CTS is set before returning, otherwise we wait and try + * again. The i2c driver also does the CTS check, but the timeouts + * used there are much too small for this USB driver, so we wait + * for it here. + */ + if (radio->buffer[1] == 0 && (radio->buffer[2] & SI4713_CTS)) { + memcpy(data, radio->buffer + 2, len); + return 0; + } + if (time_is_before_jiffies(until_jiffies)) { + /* Zero the status value, ensuring CTS isn't set */ + data[0] = 0; + return 0; + } + msleep(3); + } +} + +static int si4713_i2c_write(struct si4713_usb_device *radio, char *data, int len) +{ + int retval = -EINVAL; + int i; + + if (len > BUFFER_LENGTH - 5) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(command_table); i++) { + if (data[0] == command_table[i].command_id) + retval = send_command(radio, command_table[i].payload, + data, len); + } + + return retval < 0 ? retval : 0; +} + +static int si4713_transfer(struct i2c_adapter *i2c_adapter, + struct i2c_msg *msgs, int num) +{ + struct si4713_usb_device *radio = i2c_get_adapdata(i2c_adapter); + int retval = -EINVAL; + int i; + + if (num <= 0) + return 0; + + for (i = 0; i < num; i++) { + if (msgs[i].flags & I2C_M_RD) + retval = si4713_i2c_read(radio, msgs[i].buf, msgs[i].len); + else + retval = si4713_i2c_write(radio, msgs[i].buf, msgs[i].len); + if (retval) + break; + } + + return retval ? retval : num; +} + +static u32 si4713_functionality(struct i2c_adapter *adapter) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static struct i2c_algorithm si4713_algo = { + .master_xfer = si4713_transfer, + .functionality = si4713_functionality, +}; + +/* This name value shows up in the sysfs filename associated + with this I2C adapter */ +static struct i2c_adapter si4713_i2c_adapter_template = { + .name = "si4713-i2c", + .owner = THIS_MODULE, + .algo = &si4713_algo, +}; + +static int si4713_register_i2c_adapter(struct si4713_usb_device *radio) +{ + radio->i2c_adapter = si4713_i2c_adapter_template; + /* set up sysfs linkage to our parent device */ + radio->i2c_adapter.dev.parent = &radio->usbdev->dev; + i2c_set_adapdata(&radio->i2c_adapter, radio); + + return i2c_add_adapter(&radio->i2c_adapter); +} + +/* check if the device is present and register with v4l and usb if it is */ +static int usb_si4713_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct si4713_usb_device *radio; + struct i2c_adapter *adapter; + struct v4l2_subdev *sd; + int retval = -ENOMEM; + + dev_info(&intf->dev, "Si4713 development board discovered: (%04X:%04X)\n", + id->idVendor, id->idProduct); + + /* Initialize local device structure */ + radio = kzalloc(sizeof(struct si4713_usb_device), GFP_KERNEL); + if (radio) + radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL); + + if (!radio || !radio->buffer) { + dev_err(&intf->dev, "kmalloc for si4713_usb_device failed\n"); + kfree(radio); + return -ENOMEM; + } + + mutex_init(&radio->lock); + + radio->usbdev = interface_to_usbdev(intf); + radio->intf = intf; + usb_set_intfdata(intf, &radio->v4l2_dev); + + retval = si4713_start_seq(radio); + if (retval < 0) + goto err_v4l2; + + retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev); + if (retval < 0) { + dev_err(&intf->dev, "couldn't register v4l2_device\n"); + goto err_v4l2; + } + + retval = si4713_register_i2c_adapter(radio); + if (retval < 0) { + dev_err(&intf->dev, "could not register i2c device\n"); + goto err_i2cdev; + } + + adapter = &radio->i2c_adapter; + sd = v4l2_i2c_new_subdev_board(&radio->v4l2_dev, adapter, + &si4713_board_info, NULL); + radio->v4l2_subdev = sd; + if (!sd) { + dev_err(&intf->dev, "cannot get v4l2 subdevice\n"); + retval = -ENODEV; + goto del_adapter; + } + + radio->vdev.ctrl_handler = sd->ctrl_handler; + radio->v4l2_dev.release = usb_si4713_video_device_release; + strlcpy(radio->vdev.name, radio->v4l2_dev.name, + sizeof(radio->vdev.name)); + radio->vdev.v4l2_dev = &radio->v4l2_dev; + radio->vdev.fops = &usb_si4713_fops; + radio->vdev.ioctl_ops = &usb_si4713_ioctl_ops; + radio->vdev.lock = &radio->lock; + radio->vdev.release = video_device_release_empty; + radio->vdev.vfl_dir = VFL_DIR_TX; + + video_set_drvdata(&radio->vdev, radio); + set_bit(V4L2_FL_USE_FH_PRIO, &radio->vdev.flags); + + retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO, -1); + if (retval < 0) { + dev_err(&intf->dev, "could not register video device\n"); + goto del_adapter; + } + + dev_info(&intf->dev, "V4L2 device registered as %s\n", + video_device_node_name(&radio->vdev)); + + return 0; + +del_adapter: + i2c_del_adapter(adapter); +err_i2cdev: + v4l2_device_unregister(&radio->v4l2_dev); +err_v4l2: + kfree(radio->buffer); + kfree(radio); + return retval; +} + +static void usb_si4713_disconnect(struct usb_interface *intf) +{ + struct si4713_usb_device *radio = to_si4713_dev(usb_get_intfdata(intf)); + + dev_info(&intf->dev, "Si4713 development board now disconnected\n"); + + mutex_lock(&radio->lock); + usb_set_intfdata(intf, NULL); + video_unregister_device(&radio->vdev); + v4l2_device_disconnect(&radio->v4l2_dev); + mutex_unlock(&radio->lock); + v4l2_device_put(&radio->v4l2_dev); +} + +/* USB subsystem interface */ +static struct usb_driver usb_si4713_driver = { + .name = "radio-usb-si4713", + .probe = usb_si4713_probe, + .disconnect = usb_si4713_disconnect, + .id_table = usb_si4713_usb_device_table, +}; + +module_usb_driver(usb_si4713_driver); diff --git a/drivers/media/radio/si4713/si4713.c b/drivers/media/radio/si4713/si4713.c new file mode 100644 index 000000000000..07d5153811e8 --- /dev/null +++ b/drivers/media/radio/si4713/si4713.c @@ -0,0 +1,1557 @@ +/* + * drivers/media/radio/si4713-i2c.c + * + * Silicon Labs Si4713 FM Radio Transmitter I2C commands. + * + * Copyright (c) 2009 Nokia Corporation + * Contact: Eduardo Valentin <eduardo.valentin@nokia.com> + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/module.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-common.h> + +#include "si4713.h" + +/* module parameters */ +static int debug; +module_param(debug, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Debug level (0 - 2)"); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>"); +MODULE_DESCRIPTION("I2C driver for Si4713 FM Radio Transmitter"); +MODULE_VERSION("0.0.1"); + +#define DEFAULT_RDS_PI 0x00 +#define DEFAULT_RDS_PTY 0x00 +#define DEFAULT_RDS_DEVIATION 0x00C8 +#define DEFAULT_RDS_PS_REPEAT_COUNT 0x0003 +#define DEFAULT_LIMITER_RTIME 0x1392 +#define DEFAULT_LIMITER_DEV 0x102CA +#define DEFAULT_PILOT_FREQUENCY 0x4A38 +#define DEFAULT_PILOT_DEVIATION 0x1A5E +#define DEFAULT_ACOMP_ATIME 0x0000 +#define DEFAULT_ACOMP_RTIME 0xF4240L +#define DEFAULT_ACOMP_GAIN 0x0F +#define DEFAULT_ACOMP_THRESHOLD (-0x28) +#define DEFAULT_MUTE 0x01 +#define DEFAULT_POWER_LEVEL 88 +#define DEFAULT_FREQUENCY 8800 +#define DEFAULT_PREEMPHASIS FMPE_EU +#define DEFAULT_TUNE_RNL 0xFF + +#define to_si4713_device(sd) container_of(sd, struct si4713_device, sd) + +/* frequency domain transformation (using times 10 to avoid floats) */ +#define FREQDEV_UNIT 100000 +#define FREQV4L2_MULTI 625 +#define si4713_to_v4l2(f) ((f * FREQDEV_UNIT) / FREQV4L2_MULTI) +#define v4l2_to_si4713(f) ((f * FREQV4L2_MULTI) / FREQDEV_UNIT) +#define FREQ_RANGE_LOW 7600 +#define FREQ_RANGE_HIGH 10800 + +#define MAX_ARGS 7 + +#define RDS_BLOCK 8 +#define RDS_BLOCK_CLEAR 0x03 +#define RDS_BLOCK_LOAD 0x04 +#define RDS_RADIOTEXT_2A 0x20 +#define RDS_RADIOTEXT_BLK_SIZE 4 +#define RDS_RADIOTEXT_INDEX_MAX 0x0F +#define RDS_CARRIAGE_RETURN 0x0D + +#define rds_ps_nblocks(len) ((len / RDS_BLOCK) + (len % RDS_BLOCK ? 1 : 0)) + +#define get_status_bit(p, b, m) (((p) & (m)) >> (b)) +#define set_bits(p, v, b, m) (((p) & ~(m)) | ((v) << (b))) + +#define ATTACK_TIME_UNIT 500 + +#define POWER_OFF 0x00 +#define POWER_ON 0x01 + +#define msb(x) ((u8)((u16) x >> 8)) +#define lsb(x) ((u8)((u16) x & 0x00FF)) +#define compose_u16(msb, lsb) (((u16)msb << 8) | lsb) +#define check_command_failed(status) (!(status & SI4713_CTS) || \ + (status & SI4713_ERR)) +/* mute definition */ +#define set_mute(p) ((p & 1) | ((p & 1) << 1)); + +#ifdef DEBUG +#define DBG_BUFFER(device, message, buffer, size) \ + { \ + int i; \ + char str[(size)*5]; \ + for (i = 0; i < size; i++) \ + sprintf(str + i * 5, " 0x%02x", buffer[i]); \ + v4l2_dbg(2, debug, device, "%s:%s\n", message, str); \ + } +#else +#define DBG_BUFFER(device, message, buffer, size) +#endif + +/* + * Values for limiter release time (sorted by second column) + * device release + * value time (us) + */ +static long limiter_times[] = { + 2000, 250, + 1000, 500, + 510, 1000, + 255, 2000, + 170, 3000, + 127, 4020, + 102, 5010, + 85, 6020, + 73, 7010, + 64, 7990, + 57, 8970, + 51, 10030, + 25, 20470, + 17, 30110, + 13, 39380, + 10, 51190, + 8, 63690, + 7, 73140, + 6, 85330, + 5, 102390, +}; + +/* + * Values for audio compression release time (sorted by second column) + * device release + * value time (us) + */ +static unsigned long acomp_rtimes[] = { + 0, 100000, + 1, 200000, + 2, 350000, + 3, 525000, + 4, 1000000, +}; + +/* + * Values for preemphasis (sorted by second column) + * device preemphasis + * value value (v4l2) + */ +static unsigned long preemphasis_values[] = { + FMPE_DISABLED, V4L2_PREEMPHASIS_DISABLED, + FMPE_EU, V4L2_PREEMPHASIS_50_uS, + FMPE_USA, V4L2_PREEMPHASIS_75_uS, +}; + +static int usecs_to_dev(unsigned long usecs, unsigned long const array[], + int size) +{ + int i; + int rval = -EINVAL; + + for (i = 0; i < size / 2; i++) + if (array[(i * 2) + 1] >= usecs) { + rval = array[i * 2]; + break; + } + + return rval; +} + +/* si4713_handler: IRQ handler, just complete work */ +static irqreturn_t si4713_handler(int irq, void *dev) +{ + struct si4713_device *sdev = dev; + + v4l2_dbg(2, debug, &sdev->sd, + "%s: sending signal to completion work.\n", __func__); + complete(&sdev->work); + + return IRQ_HANDLED; +} + +/* + * si4713_send_command - sends a command to si4713 and waits its response + * @sdev: si4713_device structure for the device we are communicating + * @command: command id + * @args: command arguments we are sending (up to 7) + * @argn: actual size of @args + * @response: buffer to place the expected response from the device (up to 15) + * @respn: actual size of @response + * @usecs: amount of time to wait before reading the response (in usecs) + */ +static int si4713_send_command(struct si4713_device *sdev, const u8 command, + const u8 args[], const int argn, + u8 response[], const int respn, const int usecs) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd); + unsigned long until_jiffies; + u8 data1[MAX_ARGS + 1]; + int err; + + if (!client->adapter) + return -ENODEV; + + /* First send the command and its arguments */ + data1[0] = command; + memcpy(data1 + 1, args, argn); + DBG_BUFFER(&sdev->sd, "Parameters", data1, argn + 1); + + err = i2c_master_send(client, data1, argn + 1); + if (err != argn + 1) { + v4l2_err(&sdev->sd, "Error while sending command 0x%02x\n", + command); + return err < 0 ? err : -EIO; + } + + until_jiffies = jiffies + usecs_to_jiffies(usecs) + 1; + + /* Wait response from interrupt */ + if (client->irq) { + if (!wait_for_completion_timeout(&sdev->work, + usecs_to_jiffies(usecs) + 1)) + v4l2_warn(&sdev->sd, + "(%s) Device took too much time to answer.\n", + __func__); + } + + do { + err = i2c_master_recv(client, response, respn); + if (err != respn) { + v4l2_err(&sdev->sd, + "Error %d while reading response for command 0x%02x\n", + err, command); + return err < 0 ? err : -EIO; + } + + DBG_BUFFER(&sdev->sd, "Response", response, respn); + if (!check_command_failed(response[0])) + return 0; + + if (client->irq) + return -EBUSY; + if (usecs <= 1000) + usleep_range(usecs, 1000); + else + usleep_range(1000, 2000); + } while (time_is_after_jiffies(until_jiffies)); + + return -EBUSY; +} + +/* + * si4713_read_property - reads a si4713 property + * @sdev: si4713_device structure for the device we are communicating + * @prop: property identification number + * @pv: property value to be returned on success + */ +static int si4713_read_property(struct si4713_device *sdev, u16 prop, u32 *pv) +{ + int err; + u8 val[SI4713_GET_PROP_NRESP]; + /* + * .First byte = 0 + * .Second byte = property's MSB + * .Third byte = property's LSB + */ + const u8 args[SI4713_GET_PROP_NARGS] = { + 0x00, + msb(prop), + lsb(prop), + }; + + err = si4713_send_command(sdev, SI4713_CMD_GET_PROPERTY, + args, ARRAY_SIZE(args), val, + ARRAY_SIZE(val), DEFAULT_TIMEOUT); + + if (err < 0) + return err; + + *pv = compose_u16(val[2], val[3]); + + v4l2_dbg(1, debug, &sdev->sd, + "%s: property=0x%02x value=0x%02x status=0x%02x\n", + __func__, prop, *pv, val[0]); + + return err; +} + +/* + * si4713_write_property - modifies a si4713 property + * @sdev: si4713_device structure for the device we are communicating + * @prop: property identification number + * @val: new value for that property + */ +static int si4713_write_property(struct si4713_device *sdev, u16 prop, u16 val) +{ + int rval; + u8 resp[SI4713_SET_PROP_NRESP]; + /* + * .First byte = 0 + * .Second byte = property's MSB + * .Third byte = property's LSB + * .Fourth byte = value's MSB + * .Fifth byte = value's LSB + */ + const u8 args[SI4713_SET_PROP_NARGS] = { + 0x00, + msb(prop), + lsb(prop), + msb(val), + lsb(val), + }; + + rval = si4713_send_command(sdev, SI4713_CMD_SET_PROPERTY, + args, ARRAY_SIZE(args), + resp, ARRAY_SIZE(resp), + DEFAULT_TIMEOUT); + + if (rval < 0) + return rval; + + v4l2_dbg(1, debug, &sdev->sd, + "%s: property=0x%02x value=0x%02x status=0x%02x\n", + __func__, prop, val, resp[0]); + + /* + * As there is no command response for SET_PROPERTY, + * wait Tcomp time to finish before proceed, in order + * to have property properly set. + */ + msleep(TIMEOUT_SET_PROPERTY); + + return rval; +} + +/* + * si4713_powerup - Powers the device up + * @sdev: si4713_device structure for the device we are communicating + */ +static int si4713_powerup(struct si4713_device *sdev) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd); + int err; + u8 resp[SI4713_PWUP_NRESP]; + /* + * .First byte = Enabled interrupts and boot function + * .Second byte = Input operation mode + */ + u8 args[SI4713_PWUP_NARGS] = { + SI4713_PWUP_GPO2OEN | SI4713_PWUP_FUNC_TX, + SI4713_PWUP_OPMOD_ANALOG, + }; + + if (sdev->power_state) + return 0; + + if (sdev->supplies) { + err = regulator_bulk_enable(sdev->supplies, sdev->supply_data); + if (err) { + v4l2_err(&sdev->sd, "Failed to enable supplies: %d\n", err); + return err; + } + } + if (gpio_is_valid(sdev->gpio_reset)) { + udelay(50); + gpio_set_value(sdev->gpio_reset, 1); + } + + if (client->irq) + args[0] |= SI4713_PWUP_CTSIEN; + + err = si4713_send_command(sdev, SI4713_CMD_POWER_UP, + args, ARRAY_SIZE(args), + resp, ARRAY_SIZE(resp), + TIMEOUT_POWER_UP); + + if (!err) { + v4l2_dbg(1, debug, &sdev->sd, "Powerup response: 0x%02x\n", + resp[0]); + v4l2_dbg(1, debug, &sdev->sd, "Device in power up mode\n"); + sdev->power_state = POWER_ON; + + if (client->irq) + err = si4713_write_property(sdev, SI4713_GPO_IEN, + SI4713_STC_INT | SI4713_CTS); + return err; + } + if (gpio_is_valid(sdev->gpio_reset)) + gpio_set_value(sdev->gpio_reset, 0); + if (sdev->supplies) { + err = regulator_bulk_disable(sdev->supplies, sdev->supply_data); + if (err) + v4l2_err(&sdev->sd, + "Failed to disable supplies: %d\n", err); + } + + return err; +} + +/* + * si4713_powerdown - Powers the device down + * @sdev: si4713_device structure for the device we are communicating + */ +static int si4713_powerdown(struct si4713_device *sdev) +{ + int err; + u8 resp[SI4713_PWDN_NRESP]; + + if (!sdev->power_state) + return 0; + + err = si4713_send_command(sdev, SI4713_CMD_POWER_DOWN, + NULL, 0, + resp, ARRAY_SIZE(resp), + DEFAULT_TIMEOUT); + + if (!err) { + v4l2_dbg(1, debug, &sdev->sd, "Power down response: 0x%02x\n", + resp[0]); + v4l2_dbg(1, debug, &sdev->sd, "Device in reset mode\n"); + if (gpio_is_valid(sdev->gpio_reset)) + gpio_set_value(sdev->gpio_reset, 0); + if (sdev->supplies) { + err = regulator_bulk_disable(sdev->supplies, + sdev->supply_data); + if (err) + v4l2_err(&sdev->sd, + "Failed to disable supplies: %d\n", err); + } + sdev->power_state = POWER_OFF; + } + + return err; +} + +/* + * si4713_checkrev - Checks if we are treating a device with the correct rev. + * @sdev: si4713_device structure for the device we are communicating + */ +static int si4713_checkrev(struct si4713_device *sdev) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd); + int rval; + u8 resp[SI4713_GETREV_NRESP]; + + rval = si4713_send_command(sdev, SI4713_CMD_GET_REV, + NULL, 0, + resp, ARRAY_SIZE(resp), + DEFAULT_TIMEOUT); + + if (rval < 0) + return rval; + + if (resp[1] == SI4713_PRODUCT_NUMBER) { + v4l2_info(&sdev->sd, "chip found @ 0x%02x (%s)\n", + client->addr << 1, client->adapter->name); + } else { + v4l2_err(&sdev->sd, "Invalid product number 0x%X\n", resp[1]); + rval = -EINVAL; + } + return rval; +} + +/* + * si4713_wait_stc - Waits STC interrupt and clears status bits. Useful + * for TX_TUNE_POWER, TX_TUNE_FREQ and TX_TUNE_MEAS + * @sdev: si4713_device structure for the device we are communicating + * @usecs: timeout to wait for STC interrupt signal + */ +static int si4713_wait_stc(struct si4713_device *sdev, const int usecs) +{ + struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd); + u8 resp[SI4713_GET_STATUS_NRESP]; + unsigned long start_jiffies = jiffies; + int err; + + if (client->irq && + !wait_for_completion_timeout(&sdev->work, usecs_to_jiffies(usecs) + 1)) + v4l2_warn(&sdev->sd, + "(%s) Device took too much time to answer.\n", __func__); + + for (;;) { + /* Clear status bits */ + err = si4713_send_command(sdev, SI4713_CMD_GET_INT_STATUS, + NULL, 0, + resp, ARRAY_SIZE(resp), + DEFAULT_TIMEOUT); + /* The USB device returns errors when it waits for the + * STC bit to be set. Hence polling */ + if (err >= 0) { + v4l2_dbg(1, debug, &sdev->sd, + "%s: status bits: 0x%02x\n", __func__, resp[0]); + + if (resp[0] & SI4713_STC_INT) + return 0; + } + if (jiffies_to_usecs(jiffies - start_jiffies) > usecs) + return err < 0 ? err : -EIO; + /* We sleep here for 3-4 ms in order to avoid flooding the device + * with USB requests. The si4713 USB driver was developed + * by reverse engineering the Windows USB driver. The windows + * driver also has a ~2.5 ms delay between responses. */ + usleep_range(3000, 4000); + } +} + +/* + * si4713_tx_tune_freq - Sets the state of the RF carrier and sets the tuning + * frequency between 76 and 108 MHz in 10 kHz units and + * steps of 50 kHz. + * @sdev: si4713_device structure for the device we are communicating + * @frequency: desired frequency (76 - 108 MHz, unit 10 KHz, step 50 kHz) + */ +static int si4713_tx_tune_freq(struct si4713_device *sdev, u16 frequency) +{ + int err; + u8 val[SI4713_TXFREQ_NRESP]; + /* + * .First byte = 0 + * .Second byte = frequency's MSB + * .Third byte = frequency's LSB + */ + const u8 args[SI4713_TXFREQ_NARGS] = { + 0x00, + msb(frequency), + lsb(frequency), + }; + + err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_FREQ, + args, ARRAY_SIZE(args), val, + ARRAY_SIZE(val), DEFAULT_TIMEOUT); + + if (err < 0) + return err; + + v4l2_dbg(1, debug, &sdev->sd, + "%s: frequency=0x%02x status=0x%02x\n", __func__, + frequency, val[0]); + + err = si4713_wait_stc(sdev, TIMEOUT_TX_TUNE); + if (err < 0) + return err; + + return compose_u16(args[1], args[2]); +} + +/* + * si4713_tx_tune_power - Sets the RF voltage level between 88 and 120 dBuV in + * 1 dB units. A value of 0x00 indicates off. The command + * also sets the antenna tuning capacitance. A value of 0 + * indicates autotuning, and a value of 1 - 191 indicates + * a manual override, which results in a tuning + * capacitance of 0.25 pF x @antcap. + * @sdev: si4713_device structure for the device we are communicating + * @power: tuning power (88 - 120 dBuV, unit/step 1 dB) + * @antcap: value of antenna tuning capacitor (0 - 191) + */ +static int si4713_tx_tune_power(struct si4713_device *sdev, u8 power, + u8 antcap) +{ + int err; + u8 val[SI4713_TXPWR_NRESP]; + /* + * .First byte = 0 + * .Second byte = 0 + * .Third byte = power + * .Fourth byte = antcap + */ + u8 args[SI4713_TXPWR_NARGS] = { + 0x00, + 0x00, + power, + antcap, + }; + + /* Map power values 1-87 to MIN_POWER (88) */ + if (power > 0 && power < SI4713_MIN_POWER) + args[2] = power = SI4713_MIN_POWER; + + err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_POWER, + args, ARRAY_SIZE(args), val, + ARRAY_SIZE(val), DEFAULT_TIMEOUT); + + if (err < 0) + return err; + + v4l2_dbg(1, debug, &sdev->sd, + "%s: power=0x%02x antcap=0x%02x status=0x%02x\n", + __func__, power, antcap, val[0]); + + return si4713_wait_stc(sdev, TIMEOUT_TX_TUNE_POWER); +} + +/* + * si4713_tx_tune_measure - Enters receive mode and measures the received noise + * level in units of dBuV on the selected frequency. + * The Frequency must be between 76 and 108 MHz in 10 kHz + * units and steps of 50 kHz. The command also sets the + * antenna tuning capacitance. A value of 0 means + * autotuning, and a value of 1 to 191 indicates manual + * override. + * @sdev: si4713_device structure for the device we are communicating + * @frequency: desired frequency (76 - 108 MHz, unit 10 KHz, step 50 kHz) + * @antcap: value of antenna tuning capacitor (0 - 191) + */ +static int si4713_tx_tune_measure(struct si4713_device *sdev, u16 frequency, + u8 antcap) +{ + int err; + u8 val[SI4713_TXMEA_NRESP]; + /* + * .First byte = 0 + * .Second byte = frequency's MSB + * .Third byte = frequency's LSB + * .Fourth byte = antcap + */ + const u8 args[SI4713_TXMEA_NARGS] = { + 0x00, + msb(frequency), + lsb(frequency), + antcap, + }; + + sdev->tune_rnl = DEFAULT_TUNE_RNL; + + if (antcap > SI4713_MAX_ANTCAP) + return -EDOM; + + err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_MEASURE, + args, ARRAY_SIZE(args), val, + ARRAY_SIZE(val), DEFAULT_TIMEOUT); + + if (err < 0) + return err; + + v4l2_dbg(1, debug, &sdev->sd, + "%s: frequency=0x%02x antcap=0x%02x status=0x%02x\n", + __func__, frequency, antcap, val[0]); + + return si4713_wait_stc(sdev, TIMEOUT_TX_TUNE); +} + +/* + * si4713_tx_tune_status- Returns the status of the tx_tune_freq, tx_tune_mea or + * tx_tune_power commands. This command return the current + * frequency, output voltage in dBuV, the antenna tunning + * capacitance value and the received noise level. The + * command also clears the stcint interrupt bit when the + * first bit of its arguments is high. + * @sdev: si4713_device structure for the device we are communicating + * @intack: 0x01 to clear the seek/tune complete interrupt status indicator. + * @frequency: returned frequency + * @power: returned power + * @antcap: returned antenna capacitance + * @noise: returned noise level + */ +static int si4713_tx_tune_status(struct si4713_device *sdev, u8 intack, + u16 *frequency, u8 *power, + u8 *antcap, u8 *noise) +{ + int err; + u8 val[SI4713_TXSTATUS_NRESP]; + /* + * .First byte = intack bit + */ + const u8 args[SI4713_TXSTATUS_NARGS] = { + intack & SI4713_INTACK_MASK, + }; + + err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_STATUS, + args, ARRAY_SIZE(args), val, + ARRAY_SIZE(val), DEFAULT_TIMEOUT); + + if (!err) { + v4l2_dbg(1, debug, &sdev->sd, + "%s: status=0x%02x\n", __func__, val[0]); + *frequency = compose_u16(val[2], val[3]); + sdev->frequency = *frequency; + *power = val[5]; + *antcap = val[6]; + *noise = val[7]; + v4l2_dbg(1, debug, &sdev->sd, "%s: response: %d x 10 kHz " + "(power %d, antcap %d, rnl %d)\n", __func__, + *frequency, *power, *antcap, *noise); + } + + return err; +} + +/* + * si4713_tx_rds_buff - Loads the RDS group buffer FIFO or circular buffer. + * @sdev: si4713_device structure for the device we are communicating + * @mode: the buffer operation mode. + * @rdsb: RDS Block B + * @rdsc: RDS Block C + * @rdsd: RDS Block D + * @cbleft: returns the number of available circular buffer blocks minus the + * number of used circular buffer blocks. + */ +static int si4713_tx_rds_buff(struct si4713_device *sdev, u8 mode, u16 rdsb, + u16 rdsc, u16 rdsd, s8 *cbleft) +{ + int err; + u8 val[SI4713_RDSBUFF_NRESP]; + + const u8 args[SI4713_RDSBUFF_NARGS] = { + mode & SI4713_RDSBUFF_MODE_MASK, + msb(rdsb), + lsb(rdsb), + msb(rdsc), + lsb(rdsc), + msb(rdsd), + lsb(rdsd), + }; + + err = si4713_send_command(sdev, SI4713_CMD_TX_RDS_BUFF, + args, ARRAY_SIZE(args), val, + ARRAY_SIZE(val), DEFAULT_TIMEOUT); + + if (!err) { + v4l2_dbg(1, debug, &sdev->sd, + "%s: status=0x%02x\n", __func__, val[0]); + *cbleft = (s8)val[2] - val[3]; + v4l2_dbg(1, debug, &sdev->sd, "%s: response: interrupts" + " 0x%02x cb avail: %d cb used %d fifo avail" + " %d fifo used %d\n", __func__, val[1], + val[2], val[3], val[4], val[5]); + } + + return err; +} + +/* + * si4713_tx_rds_ps - Loads the program service buffer. + * @sdev: si4713_device structure for the device we are communicating + * @psid: program service id to be loaded. + * @pschar: assumed 4 size char array to be loaded into the program service + */ +static int si4713_tx_rds_ps(struct si4713_device *sdev, u8 psid, + unsigned char *pschar) +{ + int err; + u8 val[SI4713_RDSPS_NRESP]; + + const u8 args[SI4713_RDSPS_NARGS] = { + psid & SI4713_RDSPS_PSID_MASK, + pschar[0], + pschar[1], + pschar[2], + pschar[3], + }; + + err = si4713_send_command(sdev, SI4713_CMD_TX_RDS_PS, + args, ARRAY_SIZE(args), val, + ARRAY_SIZE(val), DEFAULT_TIMEOUT); + + if (err < 0) + return err; + + v4l2_dbg(1, debug, &sdev->sd, "%s: status=0x%02x\n", __func__, val[0]); + + return err; +} + +static int si4713_set_power_state(struct si4713_device *sdev, u8 value) +{ + if (value) + return si4713_powerup(sdev); + return si4713_powerdown(sdev); +} + +static int si4713_set_mute(struct si4713_device *sdev, u16 mute) +{ + int rval = 0; + + mute = set_mute(mute); + + if (sdev->power_state) + rval = si4713_write_property(sdev, + SI4713_TX_LINE_INPUT_MUTE, mute); + + return rval; +} + +static int si4713_set_rds_ps_name(struct si4713_device *sdev, char *ps_name) +{ + int rval = 0, i; + u8 len = 0; + + /* We want to clear the whole thing */ + if (!strlen(ps_name)) + memset(ps_name, 0, MAX_RDS_PS_NAME + 1); + + if (sdev->power_state) { + /* Write the new ps name and clear the padding */ + for (i = 0; i < MAX_RDS_PS_NAME; i += (RDS_BLOCK / 2)) { + rval = si4713_tx_rds_ps(sdev, (i / (RDS_BLOCK / 2)), + ps_name + i); + if (rval < 0) + return rval; + } + + /* Setup the size to be sent */ + if (strlen(ps_name)) + len = strlen(ps_name) - 1; + else + len = 1; + + rval = si4713_write_property(sdev, + SI4713_TX_RDS_PS_MESSAGE_COUNT, + rds_ps_nblocks(len)); + if (rval < 0) + return rval; + + rval = si4713_write_property(sdev, + SI4713_TX_RDS_PS_REPEAT_COUNT, + DEFAULT_RDS_PS_REPEAT_COUNT * 2); + if (rval < 0) + return rval; + } + + return rval; +} + +static int si4713_set_rds_radio_text(struct si4713_device *sdev, const char *rt) +{ + static const char cr[RDS_RADIOTEXT_BLK_SIZE] = { RDS_CARRIAGE_RETURN, 0 }; + int rval = 0, i; + u16 t_index = 0; + u8 b_index = 0, cr_inserted = 0; + s8 left; + + if (!sdev->power_state) + return rval; + + rval = si4713_tx_rds_buff(sdev, RDS_BLOCK_CLEAR, 0, 0, 0, &left); + if (rval < 0) + return rval; + + if (!strlen(rt)) + return rval; + + do { + /* RDS spec says that if the last block isn't used, + * then apply a carriage return + */ + if (t_index < (RDS_RADIOTEXT_INDEX_MAX * RDS_RADIOTEXT_BLK_SIZE)) { + for (i = 0; i < RDS_RADIOTEXT_BLK_SIZE; i++) { + if (!rt[t_index + i] || + rt[t_index + i] == RDS_CARRIAGE_RETURN) { + rt = cr; + cr_inserted = 1; + break; + } + } + } + + rval = si4713_tx_rds_buff(sdev, RDS_BLOCK_LOAD, + compose_u16(RDS_RADIOTEXT_2A, b_index++), + compose_u16(rt[t_index], rt[t_index + 1]), + compose_u16(rt[t_index + 2], rt[t_index + 3]), + &left); + if (rval < 0) + return rval; + + t_index += RDS_RADIOTEXT_BLK_SIZE; + + if (cr_inserted) + break; + } while (left > 0); + + return rval; +} + +/* + * si4713_update_tune_status - update properties from tx_tune_status + * command. Must be called with sdev->mutex held. + * @sdev: si4713_device structure for the device we are communicating + */ +static int si4713_update_tune_status(struct si4713_device *sdev) +{ + int rval; + u16 f = 0; + u8 p = 0, a = 0, n = 0; + + rval = si4713_tx_tune_status(sdev, 0x00, &f, &p, &a, &n); + + if (rval < 0) + goto exit; + +/* TODO: check that power_level and antenna_capacitor really are not + changed by the hardware. If they are, then these controls should become + volatiles. + sdev->power_level = p; + sdev->antenna_capacitor = a;*/ + sdev->tune_rnl = n; + +exit: + return rval; +} + +static int si4713_choose_econtrol_action(struct si4713_device *sdev, u32 id, + s32 *bit, s32 *mask, u16 *property, int *mul, + unsigned long **table, int *size) +{ + s32 rval = 0; + + switch (id) { + /* FM_TX class controls */ + case V4L2_CID_RDS_TX_PI: + *property = SI4713_TX_RDS_PI; + *mul = 1; + break; + case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: + *property = SI4713_TX_ACOMP_THRESHOLD; + *mul = 1; + break; + case V4L2_CID_AUDIO_COMPRESSION_GAIN: + *property = SI4713_TX_ACOMP_GAIN; + *mul = 1; + break; + case V4L2_CID_PILOT_TONE_FREQUENCY: + *property = SI4713_TX_PILOT_FREQUENCY; + *mul = 1; + break; + case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: + *property = SI4713_TX_ACOMP_ATTACK_TIME; + *mul = ATTACK_TIME_UNIT; + break; + case V4L2_CID_PILOT_TONE_DEVIATION: + *property = SI4713_TX_PILOT_DEVIATION; + *mul = 10; + break; + case V4L2_CID_AUDIO_LIMITER_DEVIATION: + *property = SI4713_TX_AUDIO_DEVIATION; + *mul = 10; + break; + case V4L2_CID_RDS_TX_DEVIATION: + *property = SI4713_TX_RDS_DEVIATION; + *mul = 1; + break; + + case V4L2_CID_RDS_TX_PTY: + *property = SI4713_TX_RDS_PS_MISC; + *bit = 5; + *mask = 0x1F << 5; + break; + case V4L2_CID_AUDIO_LIMITER_ENABLED: + *property = SI4713_TX_ACOMP_ENABLE; + *bit = 1; + *mask = 1 << 1; + break; + case V4L2_CID_AUDIO_COMPRESSION_ENABLED: + *property = SI4713_TX_ACOMP_ENABLE; + *bit = 0; + *mask = 1 << 0; + break; + case V4L2_CID_PILOT_TONE_ENABLED: + *property = SI4713_TX_COMPONENT_ENABLE; + *bit = 0; + *mask = 1 << 0; + break; + + case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: + *property = SI4713_TX_LIMITER_RELEASE_TIME; + *table = limiter_times; + *size = ARRAY_SIZE(limiter_times); + break; + case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: + *property = SI4713_TX_ACOMP_RELEASE_TIME; + *table = acomp_rtimes; + *size = ARRAY_SIZE(acomp_rtimes); + break; + case V4L2_CID_TUNE_PREEMPHASIS: + *property = SI4713_TX_PREEMPHASIS; + *table = preemphasis_values; + *size = ARRAY_SIZE(preemphasis_values); + break; + + default: + rval = -EINVAL; + break; + } + + return rval; +} + +static int si4713_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f); +static int si4713_s_modulator(struct v4l2_subdev *sd, const struct v4l2_modulator *); +/* + * si4713_setup - Sets the device up with current configuration. + * @sdev: si4713_device structure for the device we are communicating + */ +static int si4713_setup(struct si4713_device *sdev) +{ + struct v4l2_frequency f; + struct v4l2_modulator vm; + int rval; + + /* Device procedure needs to set frequency first */ + f.tuner = 0; + f.frequency = sdev->frequency ? sdev->frequency : DEFAULT_FREQUENCY; + f.frequency = si4713_to_v4l2(f.frequency); + rval = si4713_s_frequency(&sdev->sd, &f); + + vm.index = 0; + if (sdev->stereo) + vm.txsubchans = V4L2_TUNER_SUB_STEREO; + else + vm.txsubchans = V4L2_TUNER_SUB_MONO; + if (sdev->rds_enabled) + vm.txsubchans |= V4L2_TUNER_SUB_RDS; + si4713_s_modulator(&sdev->sd, &vm); + + return rval; +} + +/* + * si4713_initialize - Sets the device up with default configuration. + * @sdev: si4713_device structure for the device we are communicating + */ +static int si4713_initialize(struct si4713_device *sdev) +{ + int rval; + + rval = si4713_set_power_state(sdev, POWER_ON); + if (rval < 0) + return rval; + + rval = si4713_checkrev(sdev); + if (rval < 0) + return rval; + + rval = si4713_set_power_state(sdev, POWER_OFF); + if (rval < 0) + return rval; + + sdev->frequency = DEFAULT_FREQUENCY; + sdev->stereo = 1; + sdev->tune_rnl = DEFAULT_TUNE_RNL; + return 0; +} + +/* si4713_s_ctrl - set the value of a control */ +static int si4713_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct si4713_device *sdev = + container_of(ctrl->handler, struct si4713_device, ctrl_handler); + u32 val = 0; + s32 bit = 0, mask = 0; + u16 property = 0; + int mul = 0; + unsigned long *table = NULL; + int size = 0; + bool force = false; + int c; + int ret = 0; + + if (ctrl->id != V4L2_CID_AUDIO_MUTE) + return -EINVAL; + if (ctrl->is_new) { + if (ctrl->val) { + ret = si4713_set_mute(sdev, ctrl->val); + if (!ret) + ret = si4713_set_power_state(sdev, POWER_DOWN); + return ret; + } + ret = si4713_set_power_state(sdev, POWER_UP); + if (!ret) + ret = si4713_set_mute(sdev, ctrl->val); + if (!ret) + ret = si4713_setup(sdev); + if (ret) + return ret; + force = true; + } + + if (!sdev->power_state) + return 0; + + for (c = 1; !ret && c < ctrl->ncontrols; c++) { + ctrl = ctrl->cluster[c]; + + if (!force && !ctrl->is_new) + continue; + + switch (ctrl->id) { + case V4L2_CID_RDS_TX_PS_NAME: + ret = si4713_set_rds_ps_name(sdev, ctrl->string); + break; + + case V4L2_CID_RDS_TX_RADIO_TEXT: + ret = si4713_set_rds_radio_text(sdev, ctrl->string); + break; + + case V4L2_CID_TUNE_ANTENNA_CAPACITOR: + /* don't handle this control if we force setting all + * controls since in that case it will be handled by + * V4L2_CID_TUNE_POWER_LEVEL. */ + if (force) + break; + /* fall through */ + case V4L2_CID_TUNE_POWER_LEVEL: + ret = si4713_tx_tune_power(sdev, + sdev->tune_pwr_level->val, sdev->tune_ant_cap->val); + if (!ret) { + /* Make sure we don't set this twice */ + sdev->tune_ant_cap->is_new = false; + sdev->tune_pwr_level->is_new = false; + } + break; + + default: + ret = si4713_choose_econtrol_action(sdev, ctrl->id, &bit, + &mask, &property, &mul, &table, &size); + if (ret < 0) + break; + + val = ctrl->val; + if (mul) { + val = val / mul; + } else if (table) { + ret = usecs_to_dev(val, table, size); + if (ret < 0) + break; + val = ret; + ret = 0; + } + + if (mask) { + ret = si4713_read_property(sdev, property, &val); + if (ret < 0) + break; + val = set_bits(val, ctrl->val, bit, mask); + } + + ret = si4713_write_property(sdev, property, val); + if (ret < 0) + break; + if (mask) + val = ctrl->val; + break; + } + } + + return ret; +} + +/* si4713_ioctl - deal with private ioctls (only rnl for now) */ +static long si4713_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) +{ + struct si4713_device *sdev = to_si4713_device(sd); + struct si4713_rnl *rnl = arg; + u16 frequency; + int rval = 0; + + if (!arg) + return -EINVAL; + + switch (cmd) { + case SI4713_IOC_MEASURE_RNL: + frequency = v4l2_to_si4713(rnl->frequency); + + if (sdev->power_state) { + /* Set desired measurement frequency */ + rval = si4713_tx_tune_measure(sdev, frequency, 0); + if (rval < 0) + return rval; + /* get results from tune status */ + rval = si4713_update_tune_status(sdev); + if (rval < 0) + return rval; + } + rnl->rnl = sdev->tune_rnl; + break; + + default: + /* nothing */ + rval = -ENOIOCTLCMD; + } + + return rval; +} + +/* si4713_g_modulator - get modulator attributes */ +static int si4713_g_modulator(struct v4l2_subdev *sd, struct v4l2_modulator *vm) +{ + struct si4713_device *sdev = to_si4713_device(sd); + int rval = 0; + + if (!sdev) + return -ENODEV; + + if (vm->index > 0) + return -EINVAL; + + strncpy(vm->name, "FM Modulator", 32); + vm->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW | + V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_CONTROLS; + + /* Report current frequency range limits */ + vm->rangelow = si4713_to_v4l2(FREQ_RANGE_LOW); + vm->rangehigh = si4713_to_v4l2(FREQ_RANGE_HIGH); + + if (sdev->power_state) { + u32 comp_en = 0; + + rval = si4713_read_property(sdev, SI4713_TX_COMPONENT_ENABLE, + &comp_en); + if (rval < 0) + return rval; + + sdev->stereo = get_status_bit(comp_en, 1, 1 << 1); + } + + /* Report current audio mode: mono or stereo */ + if (sdev->stereo) + vm->txsubchans = V4L2_TUNER_SUB_STEREO; + else + vm->txsubchans = V4L2_TUNER_SUB_MONO; + + /* Report rds feature status */ + if (sdev->rds_enabled) + vm->txsubchans |= V4L2_TUNER_SUB_RDS; + else + vm->txsubchans &= ~V4L2_TUNER_SUB_RDS; + + return rval; +} + +/* si4713_s_modulator - set modulator attributes */ +static int si4713_s_modulator(struct v4l2_subdev *sd, const struct v4l2_modulator *vm) +{ + struct si4713_device *sdev = to_si4713_device(sd); + int rval = 0; + u16 stereo, rds; + u32 p; + + if (!sdev) + return -ENODEV; + + if (vm->index > 0) + return -EINVAL; + + /* Set audio mode: mono or stereo */ + if (vm->txsubchans & V4L2_TUNER_SUB_STEREO) + stereo = 1; + else if (vm->txsubchans & V4L2_TUNER_SUB_MONO) + stereo = 0; + else + return -EINVAL; + + rds = !!(vm->txsubchans & V4L2_TUNER_SUB_RDS); + + if (sdev->power_state) { + rval = si4713_read_property(sdev, + SI4713_TX_COMPONENT_ENABLE, &p); + if (rval < 0) + return rval; + + p = set_bits(p, stereo, 1, 1 << 1); + p = set_bits(p, rds, 2, 1 << 2); + + rval = si4713_write_property(sdev, + SI4713_TX_COMPONENT_ENABLE, p); + if (rval < 0) + return rval; + } + + sdev->stereo = stereo; + sdev->rds_enabled = rds; + + return rval; +} + +/* si4713_g_frequency - get tuner or modulator radio frequency */ +static int si4713_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f) +{ + struct si4713_device *sdev = to_si4713_device(sd); + int rval = 0; + + if (f->tuner) + return -EINVAL; + + if (sdev->power_state) { + u16 freq; + u8 p, a, n; + + rval = si4713_tx_tune_status(sdev, 0x00, &freq, &p, &a, &n); + if (rval < 0) + return rval; + + sdev->frequency = freq; + } + + f->frequency = si4713_to_v4l2(sdev->frequency); + + return rval; +} + +/* si4713_s_frequency - set tuner or modulator radio frequency */ +static int si4713_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f) +{ + struct si4713_device *sdev = to_si4713_device(sd); + int rval = 0; + u16 frequency = v4l2_to_si4713(f->frequency); + + if (f->tuner) + return -EINVAL; + + /* Check frequency range */ + frequency = clamp_t(u16, frequency, FREQ_RANGE_LOW, FREQ_RANGE_HIGH); + + if (sdev->power_state) { + rval = si4713_tx_tune_freq(sdev, frequency); + if (rval < 0) + return rval; + frequency = rval; + rval = 0; + } + sdev->frequency = frequency; + + return rval; +} + +static const struct v4l2_ctrl_ops si4713_ctrl_ops = { + .s_ctrl = si4713_s_ctrl, +}; + +static const struct v4l2_subdev_core_ops si4713_subdev_core_ops = { + .ioctl = si4713_ioctl, +}; + +static const struct v4l2_subdev_tuner_ops si4713_subdev_tuner_ops = { + .g_frequency = si4713_g_frequency, + .s_frequency = si4713_s_frequency, + .g_modulator = si4713_g_modulator, + .s_modulator = si4713_s_modulator, +}; + +static const struct v4l2_subdev_ops si4713_subdev_ops = { + .core = &si4713_subdev_core_ops, + .tuner = &si4713_subdev_tuner_ops, +}; + +/* + * I2C driver interface + */ +/* si4713_probe - probe for the device */ +static int si4713_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct si4713_device *sdev; + struct si4713_platform_data *pdata = client->dev.platform_data; + struct v4l2_ctrl_handler *hdl; + int rval, i; + + sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); + if (!sdev) { + dev_err(&client->dev, "Failed to alloc video device.\n"); + rval = -ENOMEM; + goto exit; + } + + sdev->gpio_reset = -1; + if (pdata && gpio_is_valid(pdata->gpio_reset)) { + rval = gpio_request(pdata->gpio_reset, "si4713 reset"); + if (rval) { + dev_err(&client->dev, + "Failed to request gpio: %d\n", rval); + goto free_sdev; + } + sdev->gpio_reset = pdata->gpio_reset; + gpio_direction_output(sdev->gpio_reset, 0); + sdev->supplies = pdata->supplies; + } + + for (i = 0; i < sdev->supplies; i++) + sdev->supply_data[i].supply = pdata->supply_names[i]; + + rval = regulator_bulk_get(&client->dev, sdev->supplies, + sdev->supply_data); + if (rval) { + dev_err(&client->dev, "Cannot get regulators: %d\n", rval); + goto free_gpio; + } + + v4l2_i2c_subdev_init(&sdev->sd, client, &si4713_subdev_ops); + + init_completion(&sdev->work); + + hdl = &sdev->ctrl_handler; + v4l2_ctrl_handler_init(hdl, 20); + sdev->mute = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_AUDIO_MUTE, 0, 1, 1, DEFAULT_MUTE); + + sdev->rds_pi = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_RDS_TX_PI, 0, 0xffff, 1, DEFAULT_RDS_PI); + sdev->rds_pty = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_RDS_TX_PTY, 0, 31, 1, DEFAULT_RDS_PTY); + sdev->rds_deviation = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_RDS_TX_DEVIATION, 0, MAX_RDS_DEVIATION, + 10, DEFAULT_RDS_DEVIATION); + /* + * Report step as 8. From RDS spec, psname + * should be 8. But there are receivers which scroll strings + * sized as 8xN. + */ + sdev->rds_ps_name = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_RDS_TX_PS_NAME, 0, MAX_RDS_PS_NAME, 8, 0); + /* + * Report step as 32 (2A block). From RDS spec, + * radio text should be 32 for 2A block. But there are receivers + * which scroll strings sized as 32xN. Setting default to 32. + */ + sdev->rds_radio_text = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_RDS_TX_RADIO_TEXT, 0, MAX_RDS_RADIO_TEXT, 32, 0); + + sdev->limiter_enabled = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_AUDIO_LIMITER_ENABLED, 0, 1, 1, 1); + sdev->limiter_release_time = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_AUDIO_LIMITER_RELEASE_TIME, 250, + MAX_LIMITER_RELEASE_TIME, 10, DEFAULT_LIMITER_RTIME); + sdev->limiter_deviation = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_AUDIO_LIMITER_DEVIATION, 0, + MAX_LIMITER_DEVIATION, 10, DEFAULT_LIMITER_DEV); + + sdev->compression_enabled = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_AUDIO_COMPRESSION_ENABLED, 0, 1, 1, 1); + sdev->compression_gain = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_AUDIO_COMPRESSION_GAIN, 0, MAX_ACOMP_GAIN, 1, + DEFAULT_ACOMP_GAIN); + sdev->compression_threshold = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_AUDIO_COMPRESSION_THRESHOLD, + MIN_ACOMP_THRESHOLD, MAX_ACOMP_THRESHOLD, 1, + DEFAULT_ACOMP_THRESHOLD); + sdev->compression_attack_time = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME, 0, + MAX_ACOMP_ATTACK_TIME, 500, DEFAULT_ACOMP_ATIME); + sdev->compression_release_time = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME, 100000, + MAX_ACOMP_RELEASE_TIME, 100000, DEFAULT_ACOMP_RTIME); + + sdev->pilot_tone_enabled = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_PILOT_TONE_ENABLED, 0, 1, 1, 1); + sdev->pilot_tone_deviation = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_PILOT_TONE_DEVIATION, 0, MAX_PILOT_DEVIATION, + 10, DEFAULT_PILOT_DEVIATION); + sdev->pilot_tone_freq = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_PILOT_TONE_FREQUENCY, 0, MAX_PILOT_FREQUENCY, + 1, DEFAULT_PILOT_FREQUENCY); + + sdev->tune_preemphasis = v4l2_ctrl_new_std_menu(hdl, &si4713_ctrl_ops, + V4L2_CID_TUNE_PREEMPHASIS, + V4L2_PREEMPHASIS_75_uS, 0, V4L2_PREEMPHASIS_50_uS); + sdev->tune_pwr_level = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_TUNE_POWER_LEVEL, 0, SI4713_MAX_POWER, + 1, DEFAULT_POWER_LEVEL); + sdev->tune_ant_cap = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops, + V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0, SI4713_MAX_ANTCAP, + 1, 0); + + if (hdl->error) { + rval = hdl->error; + goto free_ctrls; + } + v4l2_ctrl_cluster(20, &sdev->mute); + sdev->sd.ctrl_handler = hdl; + + if (client->irq) { + rval = request_irq(client->irq, + si4713_handler, IRQF_TRIGGER_FALLING, + client->name, sdev); + if (rval < 0) { + v4l2_err(&sdev->sd, "Could not request IRQ\n"); + goto put_reg; + } + v4l2_dbg(1, debug, &sdev->sd, "IRQ requested.\n"); + } else { + v4l2_warn(&sdev->sd, "IRQ not configured. Using timeouts.\n"); + } + + rval = si4713_initialize(sdev); + if (rval < 0) { + v4l2_err(&sdev->sd, "Failed to probe device information.\n"); + goto free_irq; + } + + return 0; + +free_irq: + if (client->irq) + free_irq(client->irq, sdev); +free_ctrls: + v4l2_ctrl_handler_free(hdl); +put_reg: + regulator_bulk_free(sdev->supplies, sdev->supply_data); +free_gpio: + if (gpio_is_valid(sdev->gpio_reset)) + gpio_free(sdev->gpio_reset); +free_sdev: + kfree(sdev); +exit: + return rval; +} + +/* si4713_remove - remove the device */ +static int si4713_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct si4713_device *sdev = to_si4713_device(sd); + + if (sdev->power_state) + si4713_set_power_state(sdev, POWER_DOWN); + + if (client->irq > 0) + free_irq(client->irq, sdev); + + v4l2_device_unregister_subdev(sd); + v4l2_ctrl_handler_free(sd->ctrl_handler); + regulator_bulk_free(sdev->supplies, sdev->supply_data); + if (gpio_is_valid(sdev->gpio_reset)) + gpio_free(sdev->gpio_reset); + kfree(sdev); + + return 0; +} + +/* si4713_i2c_driver - i2c driver interface */ +static const struct i2c_device_id si4713_id[] = { + { "si4713" , 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, si4713_id); + +static struct i2c_driver si4713_i2c_driver = { + .driver = { + .name = "si4713", + }, + .probe = si4713_probe, + .remove = si4713_remove, + .id_table = si4713_id, +}; + +module_i2c_driver(si4713_i2c_driver); diff --git a/drivers/media/radio/si4713/si4713.h b/drivers/media/radio/si4713/si4713.h new file mode 100644 index 000000000000..4837cf6e0e1b --- /dev/null +++ b/drivers/media/radio/si4713/si4713.h @@ -0,0 +1,240 @@ +/* + * drivers/media/radio/si4713-i2c.h + * + * Property and commands definitions for Si4713 radio transmitter chip. + * + * Copyright (c) 2008 Instituto Nokia de Tecnologia - INdT + * Contact: Eduardo Valentin <eduardo.valentin@nokia.com> + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + * + */ + +#ifndef SI4713_I2C_H +#define SI4713_I2C_H + +#include <linux/regulator/consumer.h> +#include <media/v4l2-subdev.h> +#include <media/v4l2-ctrls.h> +#include <media/si4713.h> + +#define SI4713_PRODUCT_NUMBER 0x0D + +/* Command Timeouts */ +#define DEFAULT_TIMEOUT 500 +#define TIMEOUT_SET_PROPERTY 20 +#define TIMEOUT_TX_TUNE_POWER 30000 +#define TIMEOUT_TX_TUNE 110000 +#define TIMEOUT_POWER_UP 200000 + +/* + * Command and its arguments definitions + */ +#define SI4713_PWUP_CTSIEN (1<<7) +#define SI4713_PWUP_GPO2OEN (1<<6) +#define SI4713_PWUP_PATCH (1<<5) +#define SI4713_PWUP_XOSCEN (1<<4) +#define SI4713_PWUP_FUNC_TX 0x02 +#define SI4713_PWUP_FUNC_PATCH 0x0F +#define SI4713_PWUP_OPMOD_ANALOG 0x50 +#define SI4713_PWUP_OPMOD_DIGITAL 0x0F +#define SI4713_PWUP_NARGS 2 +#define SI4713_PWUP_NRESP 1 +#define SI4713_CMD_POWER_UP 0x01 + +#define SI4713_GETREV_NRESP 9 +#define SI4713_CMD_GET_REV 0x10 + +#define SI4713_PWDN_NRESP 1 +#define SI4713_CMD_POWER_DOWN 0x11 + +#define SI4713_SET_PROP_NARGS 5 +#define SI4713_SET_PROP_NRESP 1 +#define SI4713_CMD_SET_PROPERTY 0x12 + +#define SI4713_GET_PROP_NARGS 3 +#define SI4713_GET_PROP_NRESP 4 +#define SI4713_CMD_GET_PROPERTY 0x13 + +#define SI4713_GET_STATUS_NRESP 1 +#define SI4713_CMD_GET_INT_STATUS 0x14 + +#define SI4713_CMD_PATCH_ARGS 0x15 +#define SI4713_CMD_PATCH_DATA 0x16 + +#define SI4713_MAX_FREQ 10800 +#define SI4713_MIN_FREQ 7600 +#define SI4713_TXFREQ_NARGS 3 +#define SI4713_TXFREQ_NRESP 1 +#define SI4713_CMD_TX_TUNE_FREQ 0x30 + +#define SI4713_MAX_POWER 120 +#define SI4713_MIN_POWER 88 +#define SI4713_MAX_ANTCAP 191 +#define SI4713_MIN_ANTCAP 0 +#define SI4713_TXPWR_NARGS 4 +#define SI4713_TXPWR_NRESP 1 +#define SI4713_CMD_TX_TUNE_POWER 0x31 + +#define SI4713_TXMEA_NARGS 4 +#define SI4713_TXMEA_NRESP 1 +#define SI4713_CMD_TX_TUNE_MEASURE 0x32 + +#define SI4713_INTACK_MASK 0x01 +#define SI4713_TXSTATUS_NARGS 1 +#define SI4713_TXSTATUS_NRESP 8 +#define SI4713_CMD_TX_TUNE_STATUS 0x33 + +#define SI4713_OVERMOD_BIT (1 << 2) +#define SI4713_IALH_BIT (1 << 1) +#define SI4713_IALL_BIT (1 << 0) +#define SI4713_ASQSTATUS_NARGS 1 +#define SI4713_ASQSTATUS_NRESP 5 +#define SI4713_CMD_TX_ASQ_STATUS 0x34 + +#define SI4713_RDSBUFF_MODE_MASK 0x87 +#define SI4713_RDSBUFF_NARGS 7 +#define SI4713_RDSBUFF_NRESP 6 +#define SI4713_CMD_TX_RDS_BUFF 0x35 + +#define SI4713_RDSPS_PSID_MASK 0x1F +#define SI4713_RDSPS_NARGS 5 +#define SI4713_RDSPS_NRESP 1 +#define SI4713_CMD_TX_RDS_PS 0x36 + +#define SI4713_CMD_GPO_CTL 0x80 +#define SI4713_CMD_GPO_SET 0x81 + +/* + * Bits from status response + */ +#define SI4713_CTS (1<<7) +#define SI4713_ERR (1<<6) +#define SI4713_RDS_INT (1<<2) +#define SI4713_ASQ_INT (1<<1) +#define SI4713_STC_INT (1<<0) + +/* + * Property definitions + */ +#define SI4713_GPO_IEN 0x0001 +#define SI4713_DIG_INPUT_FORMAT 0x0101 +#define SI4713_DIG_INPUT_SAMPLE_RATE 0x0103 +#define SI4713_REFCLK_FREQ 0x0201 +#define SI4713_REFCLK_PRESCALE 0x0202 +#define SI4713_TX_COMPONENT_ENABLE 0x2100 +#define SI4713_TX_AUDIO_DEVIATION 0x2101 +#define SI4713_TX_PILOT_DEVIATION 0x2102 +#define SI4713_TX_RDS_DEVIATION 0x2103 +#define SI4713_TX_LINE_INPUT_LEVEL 0x2104 +#define SI4713_TX_LINE_INPUT_MUTE 0x2105 +#define SI4713_TX_PREEMPHASIS 0x2106 +#define SI4713_TX_PILOT_FREQUENCY 0x2107 +#define SI4713_TX_ACOMP_ENABLE 0x2200 +#define SI4713_TX_ACOMP_THRESHOLD 0x2201 +#define SI4713_TX_ACOMP_ATTACK_TIME 0x2202 +#define SI4713_TX_ACOMP_RELEASE_TIME 0x2203 +#define SI4713_TX_ACOMP_GAIN 0x2204 +#define SI4713_TX_LIMITER_RELEASE_TIME 0x2205 +#define SI4713_TX_ASQ_INTERRUPT_SOURCE 0x2300 +#define SI4713_TX_ASQ_LEVEL_LOW 0x2301 +#define SI4713_TX_ASQ_DURATION_LOW 0x2302 +#define SI4713_TX_ASQ_LEVEL_HIGH 0x2303 +#define SI4713_TX_ASQ_DURATION_HIGH 0x2304 +#define SI4713_TX_RDS_INTERRUPT_SOURCE 0x2C00 +#define SI4713_TX_RDS_PI 0x2C01 +#define SI4713_TX_RDS_PS_MIX 0x2C02 +#define SI4713_TX_RDS_PS_MISC 0x2C03 +#define SI4713_TX_RDS_PS_REPEAT_COUNT 0x2C04 +#define SI4713_TX_RDS_PS_MESSAGE_COUNT 0x2C05 +#define SI4713_TX_RDS_PS_AF 0x2C06 +#define SI4713_TX_RDS_FIFO_SIZE 0x2C07 + +#define PREEMPHASIS_USA 75 +#define PREEMPHASIS_EU 50 +#define PREEMPHASIS_DISABLED 0 +#define FMPE_USA 0x00 +#define FMPE_EU 0x01 +#define FMPE_DISABLED 0x02 + +#define POWER_UP 0x01 +#define POWER_DOWN 0x00 + +#define MAX_RDS_PTY 31 +#define MAX_RDS_DEVIATION 90000 + +/* + * PSNAME is known to be defined as 8 character sized (RDS Spec). + * However, there is receivers which scroll PSNAME 8xN sized. + */ +#define MAX_RDS_PS_NAME 96 + +/* + * MAX_RDS_RADIO_TEXT is known to be defined as 32 (2A group) or 64 (2B group) + * character sized (RDS Spec). + * However, there is receivers which scroll them as well. + */ +#define MAX_RDS_RADIO_TEXT 384 + +#define MAX_LIMITER_RELEASE_TIME 102390 +#define MAX_LIMITER_DEVIATION 90000 + +#define MAX_PILOT_DEVIATION 90000 +#define MAX_PILOT_FREQUENCY 19000 + +#define MAX_ACOMP_RELEASE_TIME 1000000 +#define MAX_ACOMP_ATTACK_TIME 5000 +#define MAX_ACOMP_THRESHOLD 0 +#define MIN_ACOMP_THRESHOLD (-40) +#define MAX_ACOMP_GAIN 20 + +#define SI4713_NUM_SUPPLIES 2 + +/* + * si4713_device - private data + */ +struct si4713_device { + /* v4l2_subdev and i2c reference (v4l2_subdev priv data) */ + struct v4l2_subdev sd; + struct v4l2_ctrl_handler ctrl_handler; + /* private data structures */ + struct { /* si4713 control cluster */ + /* This is one big cluster since the mute control + * powers off the device and after unmuting again all + * controls need to be set at once. The only way of doing + * that is by making it one big cluster. */ + struct v4l2_ctrl *mute; + struct v4l2_ctrl *rds_ps_name; + struct v4l2_ctrl *rds_radio_text; + struct v4l2_ctrl *rds_pi; + struct v4l2_ctrl *rds_deviation; + struct v4l2_ctrl *rds_pty; + struct v4l2_ctrl *compression_enabled; + struct v4l2_ctrl *compression_threshold; + struct v4l2_ctrl *compression_gain; + struct v4l2_ctrl *compression_attack_time; + struct v4l2_ctrl *compression_release_time; + struct v4l2_ctrl *pilot_tone_enabled; + struct v4l2_ctrl *pilot_tone_freq; + struct v4l2_ctrl *pilot_tone_deviation; + struct v4l2_ctrl *limiter_enabled; + struct v4l2_ctrl *limiter_deviation; + struct v4l2_ctrl *limiter_release_time; + struct v4l2_ctrl *tune_preemphasis; + struct v4l2_ctrl *tune_pwr_level; + struct v4l2_ctrl *tune_ant_cap; + }; + struct completion work; + unsigned supplies; + struct regulator_bulk_data supply_data[SI4713_NUM_SUPPLIES]; + int gpio_reset; + u32 power_state; + u32 rds_enabled; + u32 frequency; + u32 preemphasis; + u32 stereo; + u32 tune_rnl; +}; +#endif /* ifndef SI4713_I2C_H */ |