5 files changed, 944 insertions, 0 deletions

diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
index e3c117122351..8090b87b3066 100644
--- a/drivers/media/radio/Kconfig
+++ b/drivers/media/radio/Kconfig
@@ -74,6 +74,23 @@ config RADIO_SHARK
           To compile this driver as a module, choose M here: the
           module will be called radio-shark.
 
+config RADIO_SHARK2
+        tristate "Griffin radioSHARK2 USB radio receiver"
+        depends on USB
+        ---help---
+          Choose Y here if you have this radio receiver.
+
+          There are 2 versions of this device, this driver is for version 2,
+          which is black.
+
+          In order to control your radio card, you will need to use programs
+          that are compatible with the Video For Linux API.  Information on
+          this API and pointers to "v4l" programs may be found at
+          <file:Documentation/video4linux/API.html>.
+
+          To compile this driver as a module, choose M here: the
+          module will be called radio-shark2.
+
 config I2C_SI4713
         tristate "I2C driver for Silicon Labs Si4713 device"
         depends on I2C && VIDEO_V4L2
diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile
index e03b258e18d4..c03ce4fe74e9 100644
--- a/drivers/media/radio/Makefile
+++ b/drivers/media/radio/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_RADIO_TYPHOON) += radio-typhoon.o
 obj-$(CONFIG_RADIO_TERRATEC) += radio-terratec.o
 obj-$(CONFIG_RADIO_MAXIRADIO) += radio-maxiradio.o
 obj-$(CONFIG_RADIO_SHARK) += radio-shark.o
+obj-$(CONFIG_RADIO_SHARK2) += shark2.o
 obj-$(CONFIG_RADIO_RTRACK) += radio-aimslab.o
 obj-$(CONFIG_RADIO_ZOLTRIX) += radio-zoltrix.o
 obj-$(CONFIG_RADIO_GEMTEK) += radio-gemtek.o
@@ -30,4 +31,6 @@ obj-$(CONFIG_RADIO_TIMBERDALE) += radio-timb.o
 obj-$(CONFIG_RADIO_WL1273) += radio-wl1273.o
 obj-$(CONFIG_RADIO_WL128X) += wl128x/
 
+shark2-objs := radio-shark2.o radio-tea5777.o
+
 ccflags-y += -Isound
diff --git a/drivers/media/radio/radio-shark2.c b/drivers/media/radio/radio-shark2.c
new file mode 100644
index 000000000000..b9575de3e7e8
--- /dev/null
+++ b/drivers/media/radio/radio-shark2.c
@@ -0,0 +1,348 @@
+/*
+ * Linux V4L2 radio driver for the Griffin radioSHARK2 USB radio receiver
+ *
+ * Note the radioSHARK2 offers the audio through a regular USB audio device,
+ * this driver only handles the tuning.
+ *
+ * The info necessary to drive the shark2 was taken from the small userspace
+ * shark2.c program by Hisaaki Shibata, which he kindly placed in the Public
+ * Domain.
+ *
+ * Copyright (c) 2012 Hans de Goede <hdegoede@redhat.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/init.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/workqueue.h>
+#include <media/v4l2-device.h>
+#include "radio-tea5777.h"
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("Griffin radioSHARK2, USB radio receiver driver");
+MODULE_LICENSE("GPL");
+
+static int debug;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+
+#define SHARK_IN_EP             0x83
+#define SHARK_OUT_EP            0x05
+
+#define TB_LEN 7
+#define DRV_NAME "radioshark2"
+
+#define v4l2_dev_to_shark(d) container_of(d, struct shark_device, v4l2_dev)
+
+enum { BLUE_LED, RED_LED, NO_LEDS };
+
+static void shark_led_set_blue(struct led_classdev *led_cdev,
+                               enum led_brightness value);
+static void shark_led_set_red(struct led_classdev *led_cdev,
+                              enum led_brightness value);
+
+static const struct led_classdev shark_led_templates[NO_LEDS] = {
+        [BLUE_LED] = {
+                .name           = "%s:blue:",
+                .brightness     = LED_OFF,
+                .max_brightness = 127,
+                .brightness_set = shark_led_set_blue,
+        },
+        [RED_LED] = {
+                .name           = "%s:red:",
+                .brightness     = LED_OFF,
+                .max_brightness = 1,
+                .brightness_set = shark_led_set_red,
+        },
+};
+
+struct shark_device {
+        struct usb_device *usbdev;
+        struct v4l2_device v4l2_dev;
+        struct radio_tea5777 tea;
+
+        struct work_struct led_work;
+        struct led_classdev leds[NO_LEDS];
+        char led_names[NO_LEDS][32];
+        atomic_t brightness[NO_LEDS];
+        unsigned long brightness_new;
+
+        u8 *transfer_buffer;
+};
+
+static atomic_t shark_instance = ATOMIC_INIT(0);
+
+static int shark_write_reg(struct radio_tea5777 *tea, u64 reg)
+{
+        struct shark_device *shark = tea->private_data;
+        int i, res, actual_len;
+
+        memset(shark->transfer_buffer, 0, TB_LEN);
+        shark->transfer_buffer[0] = 0x81; /* Write register command */
+        for (i = 0; i < 6; i++)
+                shark->transfer_buffer[i + 1] = (reg >> (40 - i * 8)) & 0xff;
+
+        v4l2_dbg(1, debug, tea->v4l2_dev,
+                 "shark2-write: %02x %02x %02x %02x %02x %02x %02x\n",
+                 shark->transfer_buffer[0], shark->transfer_buffer[1],
+                 shark->transfer_buffer[2], shark->transfer_buffer[3],
+                 shark->transfer_buffer[4], shark->transfer_buffer[5],
+                 shark->transfer_buffer[6]);
+
+        res = usb_interrupt_msg(shark->usbdev,
+                                usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
+                                shark->transfer_buffer, TB_LEN,
+                                &actual_len, 1000);
+        if (res < 0) {
+                v4l2_err(tea->v4l2_dev, "write error: %d\n", res);
+                return res;
+        }
+
+        return 0;
+}
+
+static int shark_read_reg(struct radio_tea5777 *tea, u32 *reg_ret)
+{
+        struct shark_device *shark = tea->private_data;
+        int i, res, actual_len;
+        u32 reg = 0;
+
+        memset(shark->transfer_buffer, 0, TB_LEN);
+        shark->transfer_buffer[0] = 0x82;
+        res = usb_interrupt_msg(shark->usbdev,
+                                usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
+                                shark->transfer_buffer, TB_LEN,
+                                &actual_len, 1000);
+        if (res < 0) {
+                v4l2_err(tea->v4l2_dev, "request-read error: %d\n", res);
+                return res;
+        }
+
+        res = usb_interrupt_msg(shark->usbdev,
+                                usb_rcvintpipe(shark->usbdev, SHARK_IN_EP),
+                                shark->transfer_buffer, TB_LEN,
+                                &actual_len, 1000);
+        if (res < 0) {
+                v4l2_err(tea->v4l2_dev, "read error: %d\n", res);
+                return res;
+        }
+
+        for (i = 0; i < 3; i++)
+                reg |= shark->transfer_buffer[i] << (16 - i * 8);
+
+        v4l2_dbg(1, debug, tea->v4l2_dev, "shark2-read: %02x %02x %02x\n",
+                 shark->transfer_buffer[0], shark->transfer_buffer[1],
+                 shark->transfer_buffer[2]);
+
+        *reg_ret = reg;
+        return 0;
+}
+
+static struct radio_tea5777_ops shark_tea_ops = {
+        .write_reg = shark_write_reg,
+        .read_reg  = shark_read_reg,
+};
+
+static void shark_led_work(struct work_struct *work)
+{
+        struct shark_device *shark =
+                container_of(work, struct shark_device, led_work);
+        int i, res, brightness, actual_len;
+        /*
+         * We use the v4l2_dev lock and registered bit to ensure the device
+         * does not get unplugged and unreffed while we're running.
+         */
+        mutex_lock(&shark->tea.mutex);
+        if (!video_is_registered(&shark->tea.vd))
+                goto leave;
+
+        for (i = 0; i < 2; i++) {
+                if (!test_and_clear_bit(i, &shark->brightness_new))
+                        continue;
+
+                brightness = atomic_read(&shark->brightness[i]);
+                memset(shark->transfer_buffer, 0, TB_LEN);
+                shark->transfer_buffer[0] = 0x83 + i;
+                shark->transfer_buffer[1] = brightness;
+                res = usb_interrupt_msg(shark->usbdev,
+                                        usb_sndintpipe(shark->usbdev,
+                                                       SHARK_OUT_EP),
+                                        shark->transfer_buffer, TB_LEN,
+                                        &actual_len, 1000);
+                if (res < 0)
+                        v4l2_err(&shark->v4l2_dev, "set LED %s error: %d\n",
+                                 shark->led_names[i], res);
+        }
+leave:
+        mutex_unlock(&shark->tea.mutex);
+}
+
+static void shark_led_set_blue(struct led_classdev *led_cdev,
+                               enum led_brightness value)
+{
+        struct shark_device *shark =
+                container_of(led_cdev, struct shark_device, leds[BLUE_LED]);
+
+        atomic_set(&shark->brightness[BLUE_LED], value);
+        set_bit(BLUE_LED, &shark->brightness_new);
+        schedule_work(&shark->led_work);
+}
+
+static void shark_led_set_red(struct led_classdev *led_cdev,
+                              enum led_brightness value)
+{
+        struct shark_device *shark =
+                container_of(led_cdev, struct shark_device, leds[RED_LED]);
+
+        atomic_set(&shark->brightness[RED_LED], value);
+        set_bit(RED_LED, &shark->brightness_new);
+        schedule_work(&shark->led_work);
+}
+
+static void usb_shark_disconnect(struct usb_interface *intf)
+{
+        struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
+        struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
+        int i;
+
+        mutex_lock(&shark->tea.mutex);
+        v4l2_device_disconnect(&shark->v4l2_dev);
+        radio_tea5777_exit(&shark->tea);
+        mutex_unlock(&shark->tea.mutex);
+
+        for (i = 0; i < NO_LEDS; i++)
+                led_classdev_unregister(&shark->leds[i]);
+
+        v4l2_device_put(&shark->v4l2_dev);
+}
+
+static void usb_shark_release(struct v4l2_device *v4l2_dev)
+{
+        struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
+
+        cancel_work_sync(&shark->led_work);
+        v4l2_device_unregister(&shark->v4l2_dev);
+        kfree(shark->transfer_buffer);
+        kfree(shark);
+}
+
+static int usb_shark_probe(struct usb_interface *intf,
+                           const struct usb_device_id *id)
+{
+        struct shark_device *shark;
+        int i, retval = -ENOMEM;
+
+        shark = kzalloc(sizeof(struct shark_device), GFP_KERNEL);
+        if (!shark)
+                return retval;
+
+        shark->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);
+        if (!shark->transfer_buffer)
+                goto err_alloc_buffer;
+
+        /*
+         * Work around a bug in usbhid/hid-core.c, where it leaves a dangling
+         * pointer in intfdata causing v4l2-device.c to not set it. Which
+         * results in usb_shark_disconnect() referencing the dangling pointer
+         *
+         * REMOVE (as soon as the above bug is fixed, patch submitted)
+         */
+        usb_set_intfdata(intf, NULL);
+
+        shark->v4l2_dev.release = usb_shark_release;
+        v4l2_device_set_name(&shark->v4l2_dev, DRV_NAME, &shark_instance);
+        retval = v4l2_device_register(&intf->dev, &shark->v4l2_dev);
+        if (retval) {
+                v4l2_err(&shark->v4l2_dev, "couldn't register v4l2_device\n");
+                goto err_reg_dev;
+        }
+
+        shark->usbdev = interface_to_usbdev(intf);
+        shark->tea.v4l2_dev = &shark->v4l2_dev;
+        shark->tea.private_data = shark;
+        shark->tea.ops = &shark_tea_ops;
+        shark->tea.has_am = true;
+        shark->tea.write_before_read = true;
+        strlcpy(shark->tea.card, "Griffin radioSHARK2",
+                sizeof(shark->tea.card));
+        usb_make_path(shark->usbdev, shark->tea.bus_info,
+                sizeof(shark->tea.bus_info));
+
+        retval = radio_tea5777_init(&shark->tea, THIS_MODULE);
+        if (retval) {
+                v4l2_err(&shark->v4l2_dev, "couldn't init tea5777\n");
+                goto err_init_tea;
+        }
+
+        INIT_WORK(&shark->led_work, shark_led_work);
+        for (i = 0; i < NO_LEDS; i++) {
+                shark->leds[i] = shark_led_templates[i];
+                snprintf(shark->led_names[i], sizeof(shark->led_names[0]),
+                         shark->leds[i].name, shark->v4l2_dev.name);
+                shark->leds[i].name = shark->led_names[i];
+                /*
+                 * We don't fail the probe if we fail to register the leds,
+                 * because once we've called radio_tea5777_init, the /dev/radio0
+                 * node may be opened from userspace holding a reference to us!
+                 *
+                 * Note we cannot register the leds first instead as
+                 * shark_led_work depends on the v4l2 mutex and registered bit.
+                 */
+                retval = led_classdev_register(&intf->dev, &shark->leds[i]);
+                if (retval)
+                        v4l2_err(&shark->v4l2_dev,
+                                 "couldn't register led: %s\n",
+                                 shark->led_names[i]);
+        }
+
+        return 0;
+
+err_init_tea:
+        v4l2_device_unregister(&shark->v4l2_dev);
+err_reg_dev:
+        kfree(shark->transfer_buffer);
+err_alloc_buffer:
+        kfree(shark);
+
+        return retval;
+}
+
+/* Specify the bcdDevice value, as the radioSHARK and radioSHARK2 share ids */
+static struct usb_device_id usb_shark_device_table[] = {
+        { .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION |
+                         USB_DEVICE_ID_MATCH_INT_CLASS,
+          .idVendor     = 0x077d,
+          .idProduct    = 0x627a,
+          .bcdDevice_lo = 0x0010,
+          .bcdDevice_hi = 0x0010,
+          .bInterfaceClass = 3,
+        },
+        { }
+};
+MODULE_DEVICE_TABLE(usb, usb_shark_device_table);
+
+static struct usb_driver usb_shark_driver = {
+        .name                   = DRV_NAME,
+        .probe                  = usb_shark_probe,
+        .disconnect             = usb_shark_disconnect,
+        .id_table               = usb_shark_device_table,
+};
+module_usb_driver(usb_shark_driver);
diff --git a/drivers/media/radio/radio-tea5777.c b/drivers/media/radio/radio-tea5777.c
new file mode 100644
index 000000000000..3e12179364f8
--- /dev/null
+++ b/drivers/media/radio/radio-tea5777.c
@@ -0,0 +1,489 @@
+/*
+ *   v4l2 driver for TEA5777 Philips AM/FM radio tuner chips
+ *
+ *      Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
+ *
+ *   Based on the ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips:
+ *
+ *      Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
+ *
+ *   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/delay.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
+#include "radio-tea5777.h"
+
+MODULE_AUTHOR("Hans de Goede <perex@perex.cz>");
+MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips");
+MODULE_LICENSE("GPL");
+
+/* Fixed FM only band for now, will implement multi-band support when the
+   VIDIOC_ENUM_FREQ_BANDS API is upstream */
+#define TEA5777_FM_RANGELOW             (76000 * 16)
+#define TEA5777_FM_RANGEHIGH            (108000 * 16)
+
+#define TEA5777_FM_IF                   150 /* kHz */
+#define TEA5777_FM_FREQ_STEP            50 /* kHz */
+
+/* Write reg, common bits */
+#define TEA5777_W_MUTE_MASK             (1LL << 47)
+#define TEA5777_W_MUTE_SHIFT            47
+#define TEA5777_W_AM_FM_MASK            (1LL << 46)
+#define TEA5777_W_AM_FM_SHIFT           46
+#define TEA5777_W_STB_MASK              (1LL << 45)
+#define TEA5777_W_STB_SHIFT             45
+
+#define TEA5777_W_IFCE_MASK             (1LL << 29)
+#define TEA5777_W_IFCE_SHIFT            29
+#define TEA5777_W_IFW_MASK              (1LL << 28)
+#define TEA5777_W_IFW_SHIFT             28
+#define TEA5777_W_HILO_MASK             (1LL << 27)
+#define TEA5777_W_HILO_SHIFT            27
+#define TEA5777_W_DBUS_MASK             (1LL << 26)
+#define TEA5777_W_DBUS_SHIFT            26
+
+#define TEA5777_W_INTEXT_MASK           (1LL << 24)
+#define TEA5777_W_INTEXT_SHIFT          24
+#define TEA5777_W_P1_MASK               (1LL << 23)
+#define TEA5777_W_P1_SHIFT              23
+#define TEA5777_W_P0_MASK               (1LL << 22)
+#define TEA5777_W_P0_SHIFT              22
+#define TEA5777_W_PEN1_MASK             (1LL << 21)
+#define TEA5777_W_PEN1_SHIFT            21
+#define TEA5777_W_PEN0_MASK             (1LL << 20)
+#define TEA5777_W_PEN0_SHIFT            20
+
+#define TEA5777_W_CHP0_MASK             (1LL << 18)
+#define TEA5777_W_CHP0_SHIFT            18
+#define TEA5777_W_DEEM_MASK             (1LL << 17)
+#define TEA5777_W_DEEM_SHIFT            17
+
+#define TEA5777_W_SEARCH_MASK           (1LL << 7)
+#define TEA5777_W_SEARCH_SHIFT          7
+#define TEA5777_W_PROGBLIM_MASK         (1LL << 6)
+#define TEA5777_W_PROGBLIM_SHIFT        6
+#define TEA5777_W_UPDWN_MASK            (1LL << 5)
+#define TEA5777_W_UPDWN_SHIFT           5
+#define TEA5777_W_SLEV_MASK             (3LL << 3)
+#define TEA5777_W_SLEV_SHIFT            3
+
+/* Write reg, FM specific bits */
+#define TEA5777_W_FM_PLL_MASK           (0x1fffLL << 32)
+#define TEA5777_W_FM_PLL_SHIFT          32
+#define TEA5777_W_FM_FREF_MASK          (0x03LL << 30)
+#define TEA5777_W_FM_FREF_SHIFT         30
+#define TEA5777_W_FM_FREF_VALUE         0 /* 50 kHz tune steps, 150 kHz IF */
+
+#define TEA5777_W_FM_FORCEMONO_MASK     (1LL << 15)
+#define TEA5777_W_FM_FORCEMONO_SHIFT    15
+#define TEA5777_W_FM_SDSOFF_MASK        (1LL << 14)
+#define TEA5777_W_FM_SDSOFF_SHIFT       14
+#define TEA5777_W_FM_DOFF_MASK          (1LL << 13)
+#define TEA5777_W_FM_DOFF_SHIFT         13
+
+#define TEA5777_W_FM_STEP_MASK          (3LL << 1)
+#define TEA5777_W_FM_STEP_SHIFT         1
+
+/* Write reg, AM specific bits */
+#define TEA5777_W_AM_PLL_MASK           (0x7ffLL << 34)
+#define TEA5777_W_AM_PLL_SHIFT          34
+#define TEA5777_W_AM_AGCRF_MASK         (1LL << 33)
+#define TEA5777_W_AM_AGCRF_SHIFT        33
+#define TEA5777_W_AM_AGCIF_MASK         (1LL << 32)
+#define TEA5777_W_AM_AGCIF_SHIFT        32
+#define TEA5777_W_AM_MWLW_MASK          (1LL << 31)
+#define TEA5777_W_AM_MWLW_SHIFT         31
+#define TEA5777_W_AM_LNA_MASK           (1LL << 30)
+#define TEA5777_W_AM_LNA_SHIFT          30
+
+#define TEA5777_W_AM_PEAK_MASK          (1LL << 25)
+#define TEA5777_W_AM_PEAK_SHIFT         25
+
+#define TEA5777_W_AM_RFB_MASK           (1LL << 16)
+#define TEA5777_W_AM_RFB_SHIFT          16
+#define TEA5777_W_AM_CALLIGN_MASK       (1LL << 15)
+#define TEA5777_W_AM_CALLIGN_SHIFT      15
+#define TEA5777_W_AM_CBANK_MASK         (0x7fLL << 8)
+#define TEA5777_W_AM_CBANK_SHIFT        8
+
+#define TEA5777_W_AM_DELAY_MASK         (1LL << 2)
+#define TEA5777_W_AM_DELAY_SHIFT        2
+#define TEA5777_W_AM_STEP_MASK          (1LL << 1)
+#define TEA5777_W_AM_STEP_SHIFT         1
+
+/* Read reg, common bits */
+#define TEA5777_R_LEVEL_MASK            (0x0f << 17)
+#define TEA5777_R_LEVEL_SHIFT           17
+#define TEA5777_R_SFOUND_MASK           (0x01 << 16)
+#define TEA5777_R_SFOUND_SHIFT          16
+#define TEA5777_R_BLIM_MASK             (0x01 << 15)
+#define TEA5777_R_BLIM_SHIFT            15
+
+/* Read reg, FM specific bits */
+#define TEA5777_R_FM_STEREO_MASK        (0x01 << 21)
+#define TEA5777_R_FM_STEREO_SHIFT       21
+#define TEA5777_R_FM_PLL_MASK           0x1fff
+#define TEA5777_R_FM_PLL_SHIFT          0
+
+static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)
+{
+        return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
+}
+
+static int radio_tea5777_set_freq(struct radio_tea5777 *tea)
+{
+        u64 freq;
+        int res;
+
+        freq = clamp_t(u32, tea->freq,
+                       TEA5777_FM_RANGELOW, TEA5777_FM_RANGEHIGH);
+        freq = (freq + 8) / 16; /* to kHz */
+
+        freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
+
+        tea->write_reg &= ~(TEA5777_W_FM_PLL_MASK | TEA5777_W_FM_FREF_MASK);
+        tea->write_reg |= freq << TEA5777_W_FM_PLL_SHIFT;
+        tea->write_reg |= TEA5777_W_FM_FREF_VALUE << TEA5777_W_FM_FREF_SHIFT;
+
+        res = tea->ops->write_reg(tea, tea->write_reg);
+        if (res)
+                return res;
+
+        tea->needs_write = false;
+        tea->read_reg = -1;
+        tea->freq = tea5777_freq_to_v4l2_freq(tea, freq);
+
+        return 0;
+}
+
+static int radio_tea5777_update_read_reg(struct radio_tea5777 *tea, int wait)
+{
+        int res;
+
+        if (tea->read_reg != -1)
+                return 0;
+
+        if (tea->write_before_read && tea->needs_write) {
+                res = radio_tea5777_set_freq(tea);
+                if (res)
+                        return res;
+        }
+
+        if (wait) {
+                if (schedule_timeout_interruptible(msecs_to_jiffies(wait)))
+                        return -ERESTARTSYS;
+        }
+
+        res = tea->ops->read_reg(tea, &tea->read_reg);
+        if (res)
+                return res;
+
+        tea->needs_write = true;
+        return 0;
+}
+
+/*
+ * Linux Video interface
+ */
+
+static int vidioc_querycap(struct file *file, void  *priv,
+                                        struct v4l2_capability *v)
+{
+        struct radio_tea5777 *tea = video_drvdata(file);
+
+        strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
+        strlcpy(v->card, tea->card, sizeof(v->card));
+        strlcat(v->card, " TEA5777", sizeof(v->card));
+        strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
+        v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+        v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
+        v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
+        return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+                                        struct v4l2_tuner *v)
+{
+        struct radio_tea5777 *tea = video_drvdata(file);
+        int res;
+
+        if (v->index > 0)
+                return -EINVAL;
+
+        res = radio_tea5777_update_read_reg(tea, 0);
+        if (res)
+                return res;
+
+        memset(v, 0, sizeof(*v));
+        if (tea->has_am)
+                strlcpy(v->name, "AM/FM", sizeof(v->name));
+        else
+                strlcpy(v->name, "FM", sizeof(v->name));
+        v->type = V4L2_TUNER_RADIO;
+        v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
+                        V4L2_TUNER_CAP_HWSEEK_BOUNDED;
+        v->rangelow   = TEA5777_FM_RANGELOW;
+        v->rangehigh  = TEA5777_FM_RANGEHIGH;
+        v->rxsubchans = (tea->read_reg & TEA5777_R_FM_STEREO_MASK) ?
+                        V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
+        v->audmode = (tea->write_reg & TEA5777_W_FM_FORCEMONO_MASK) ?
+                V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
+        /* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */
+        v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>
+                    (TEA5777_R_LEVEL_SHIFT - 12);
+
+        /* Invalidate read_reg, so that next call we return up2date signal */
+        tea->read_reg = -1;
+
+        return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+                                        struct v4l2_tuner *v)
+{
+        struct radio_tea5777 *tea = video_drvdata(file);
+
+        if (v->index)
+                return -EINVAL;
+
+        if (v->audmode == V4L2_TUNER_MODE_MONO)
+                tea->write_reg |= TEA5777_W_FM_FORCEMONO_MASK;
+        else
+                tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
+
+        return radio_tea5777_set_freq(tea);
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+                                        struct v4l2_frequency *f)
+{
+        struct radio_tea5777 *tea = video_drvdata(file);
+
+        if (f->tuner != 0)
+                return -EINVAL;
+        f->type = V4L2_TUNER_RADIO;
+        f->frequency = tea->freq;
+        return 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+                                        struct v4l2_frequency *f)
+{
+        struct radio_tea5777 *tea = video_drvdata(file);
+
+        if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+                return -EINVAL;
+
+        tea->freq = f->frequency;
+        return radio_tea5777_set_freq(tea);
+}
+
+static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
+                                        struct v4l2_hw_freq_seek *a)
+{
+        struct radio_tea5777 *tea = video_drvdata(file);
+        u32 orig_freq = tea->freq;
+        unsigned long timeout;
+        int res, spacing = 200 * 16; /* 200 kHz */
+        /* These are fixed *for now* */
+        const u32 seek_rangelow  = TEA5777_FM_RANGELOW;
+        const u32 seek_rangehigh = TEA5777_FM_RANGEHIGH;
+
+        if (a->tuner || a->wrap_around)
+                return -EINVAL;
+
+        tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
+        if (seek_rangelow != tea->seek_rangelow) {
+                tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
+                tea->freq = seek_rangelow;
+                res = radio_tea5777_set_freq(tea);
+                if (res)
+                        goto leave;
+                tea->seek_rangelow = tea->freq;
+        }
+        if (seek_rangehigh != tea->seek_rangehigh) {
+                tea->write_reg |= TEA5777_W_UPDWN_MASK;
+                tea->freq = seek_rangehigh;
+                res = radio_tea5777_set_freq(tea);
+                if (res)
+                        goto leave;
+                tea->seek_rangehigh = tea->freq;
+        }
+        tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
+
+        tea->write_reg |= TEA5777_W_SEARCH_MASK;
+        if (a->seek_upward) {
+                tea->write_reg |= TEA5777_W_UPDWN_MASK;
+                tea->freq = orig_freq + spacing;
+        } else {
+                tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
+                tea->freq = orig_freq - spacing;
+        }
+        res = radio_tea5777_set_freq(tea);
+        if (res)
+                goto leave;
+
+        timeout = jiffies + msecs_to_jiffies(5000);
+        for (;;) {
+                if (time_after(jiffies, timeout)) {
+                        res = -ENODATA;
+                        break;
+                }
+
+                res = radio_tea5777_update_read_reg(tea, 100);
+                if (res)
+                        break;
+
+                /*
+                 * Note we use tea->freq to track how far we've searched sofar
+                 * this is necessary to ensure we continue seeking at the right
+                 * point, in the write_before_read case.
+                 */
+                tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK);
+                tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq);
+
+                if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) {
+                        tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
+                        return 0;
+                }
+
+                if (tea->read_reg & TEA5777_R_BLIM_MASK) {
+                        res = -ENODATA;
+                        break;
+                }
+
+                /* Force read_reg update */
+                tea->read_reg = -1;
+        }
+leave:
+        tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
+        tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
+        tea->freq = orig_freq;
+        radio_tea5777_set_freq(tea);
+        return res;
+}
+
+static int tea575x_s_ctrl(struct v4l2_ctrl *c)
+{
+        struct radio_tea5777 *tea =
+                container_of(c->handler, struct radio_tea5777, ctrl_handler);
+
+        switch (c->id) {
+        case V4L2_CID_AUDIO_MUTE:
+                if (c->val)
+                        tea->write_reg |= TEA5777_W_MUTE_MASK;
+                else
+                        tea->write_reg &= ~TEA5777_W_MUTE_MASK;
+
+                return radio_tea5777_set_freq(tea);
+        }
+
+        return -EINVAL;
+}
+
+static const struct v4l2_file_operations tea575x_fops = {
+        .unlocked_ioctl = video_ioctl2,
+        .open           = v4l2_fh_open,
+        .release        = v4l2_fh_release,
+        .poll           = v4l2_ctrl_poll,
+};
+
+static const struct v4l2_ioctl_ops tea575x_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_s_hw_freq_seek = vidioc_s_hw_freq_seek,
+        .vidioc_log_status  = v4l2_ctrl_log_status,
+        .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+        .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static const struct video_device tea575x_radio = {
+        .ioctl_ops      = &tea575x_ioctl_ops,
+        .release        = video_device_release_empty,
+};
+
+static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
+        .s_ctrl = tea575x_s_ctrl,
+};
+
+int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
+{
+        int res;
+
+        tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) |
+                         (1LL << TEA5777_W_IFW_SHIFT) |
+                         (1LL << TEA5777_W_INTEXT_SHIFT) |
+                         (1LL << TEA5777_W_CHP0_SHIFT) |
+                         (2LL << TEA5777_W_SLEV_SHIFT);
+        tea->freq = 90500 * 16; /* 90.5Mhz default */
+        res = radio_tea5777_set_freq(tea);
+        if (res) {
+                v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);
+                return res;
+        }
+
+        tea->vd = tea575x_radio;
+        video_set_drvdata(&tea->vd, tea);
+        mutex_init(&tea->mutex);
+        strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
+        tea->vd.lock = &tea->mutex;
+        tea->vd.v4l2_dev = tea->v4l2_dev;
+        tea->fops = tea575x_fops;
+        tea->fops.owner = owner;
+        tea->vd.fops = &tea->fops;
+        set_bit(V4L2_FL_USE_FH_PRIO, &tea->vd.flags);
+
+        tea->vd.ctrl_handler = &tea->ctrl_handler;
+        v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
+        v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
+                          V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
+        res = tea->ctrl_handler.error;
+        if (res) {
+                v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
+                v4l2_ctrl_handler_free(&tea->ctrl_handler);
+                return res;
+        }
+        v4l2_ctrl_handler_setup(&tea->ctrl_handler);
+
+        res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1);
+        if (res) {
+                v4l2_err(tea->v4l2_dev, "can't register video device!\n");
+                v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
+                return res;
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(radio_tea5777_init);
+
+void radio_tea5777_exit(struct radio_tea5777 *tea)
+{
+        video_unregister_device(&tea->vd);
+        v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
+}
+EXPORT_SYMBOL_GPL(radio_tea5777_exit);
diff --git a/drivers/media/radio/radio-tea5777.h b/drivers/media/radio/radio-tea5777.h
new file mode 100644
index 000000000000..55cbd78df5ed
--- /dev/null
+++ b/drivers/media/radio/radio-tea5777.h
@@ -0,0 +1,87 @@
+#ifndef __RADIO_TEA5777_H
+#define __RADIO_TEA5777_H
+
+/*
+ *   v4l2 driver for TEA5777 Philips AM/FM radio tuner chips
+ *
+ *      Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
+ *
+ *   Based on the ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips:
+ *
+ *      Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
+ *      Copyright (c) 2012 Hans de Goede <hdegoede@redhat.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/videodev2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+
+#define TEA575X_FMIF    10700
+#define TEA575X_AMIF      450
+
+struct radio_tea5777;
+
+struct radio_tea5777_ops {
+        /*
+         * Write the 6 bytes large write register of the tea5777
+         *
+         * val represents the 6 write registers, with byte 1 from the
+         * datasheet being the most significant byte (so byte 5 of the u64),
+         * and byte 6 from the datasheet being the least significant byte.
+         *
+         * returns 0 on success.
+         */
+        int (*write_reg)(struct radio_tea5777 *tea, u64 val);
+        /*
+         * Read the 3 bytes large read register of the tea5777
+         *
+         * The read value gets returned in val, akin to write_reg, byte 1 from
+         * the datasheet is stored as the most significant byte (so byte 2 of
+         * the u32), and byte 3 from the datasheet gets stored as the least
+         * significant byte (iow byte 0 of the u32).
+         *
+         * returns 0 on success.
+         */
+        int (*read_reg)(struct radio_tea5777 *tea, u32 *val);
+};
+
+struct radio_tea5777 {
+        struct v4l2_device *v4l2_dev;
+        struct v4l2_file_operations fops;
+        struct video_device vd;         /* video device */
+        bool has_am;                    /* Device can tune to AM freqs */
+        bool write_before_read;         /* must write before read quirk */
+        bool needs_write;               /* for write before read quirk */
+        u32 freq;                       /* current frequency */
+        u32 seek_rangelow;              /* current hwseek limits */
+        u32 seek_rangehigh;
+        u32 read_reg;
+        u64 write_reg;
+        struct mutex mutex;
+        struct radio_tea5777_ops *ops;
+        void *private_data;
+        u8 card[32];
+        u8 bus_info[32];
+        struct v4l2_ctrl_handler ctrl_handler;
+};
+
+int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner);
+void radio_tea5777_exit(struct radio_tea5777 *tea);
+
+#endif /* __RADIO_TEA5777_H */