V4L/DVB (8657): cxusb: add lgs8gl5 and support for Magic-Pro DMB-TH usb stick

Add support for Magic-Pro DMB-TH usb stick.  DMB-TH is the HDTV broadcast
standard used in Hong Kong and China.
[...]
I've also attached a second patch against the dvb-apps repository which
adds a DMB-TH scan file for Hong Kong.

Since the ProHDTV stick contains a DMB-TH decoder (lgs8gl5) onboard,
it outputs MPEG-TS to the PC.

Signed-off-by: Timothy Lee <timothy.lee@siriushk.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

6 files changed, 821 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/cxusb.c b/drivers/media/dvb/dvb-usb/cxusb.c
index 338c819ca739..bffb44380389 100644
--- a/drivers/media/dvb/dvb-usb/cxusb.c
+++ b/drivers/media/dvb/dvb-usb/cxusb.c
@@ -38,6 +38,7 @@
 #include "mxl5005s.h"
 #include "dib7000p.h"
 #include "dib0070.h"
+#include "lgs8gl5.h"
 
 /* debug */
 static int dvb_usb_cxusb_debug;
@@ -111,6 +112,25 @@ static void cxusb_nano2_led(struct dvb_usb_device *d, int onoff)
         cxusb_bluebird_gpio_rw(d, 0x40, onoff ? 0 : 0x40);
 }
 
+static int cxusb_d680_dmb_gpio_tuner(struct dvb_usb_device *d,
+                u8 addr, int onoff)
+{
+        u8  o[2] = {addr, onoff};
+        u8  i;
+        int rc;
+
+        rc = cxusb_ctrl_msg(d, CMD_GPIO_WRITE, o, 2, &i, 1);
+
+        if (rc < 0)
+                return rc;
+        if (i == 0x01)
+                return 0;
+        else {
+                deb_info("gpio_write failed.\n");
+                return -EIO;
+        }
+}
+
 /* I2C */
 static int cxusb_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
                           int num)
@@ -264,6 +284,20 @@ static int cxusb_nano2_power_ctrl(struct dvb_usb_device *d, int onoff)
         return rc;
 }
 
+static int cxusb_d680_dmb_power_ctrl(struct dvb_usb_device *d, int onoff)
+{
+        int ret;
+        u8  b;
+        ret = cxusb_power_ctrl(d, onoff);
+        if (!onoff)
+                return ret;
+
+        msleep(128);
+        cxusb_ctrl_msg(d, CMD_DIGITAL, NULL, 0, &b, 1);
+        msleep(100);
+        return ret;
+}
+
 static int cxusb_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 {
         u8 buf[2] = { 0x03, 0x00 };
@@ -285,6 +319,67 @@ static int cxusb_aver_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
         return 0;
 }
 
+static void cxusb_d680_dmb_drain_message(struct dvb_usb_device *d)
+{
+        int       ep = d->props.generic_bulk_ctrl_endpoint;
+        const int timeout = 100;
+        const int junk_len = 32;
+        u8        *junk;
+        int       rd_count;
+
+        /* Discard remaining data in video pipe */
+        junk = kmalloc(junk_len, GFP_KERNEL);
+        if (!junk)
+                return;
+        while (1) {
+                if (usb_bulk_msg(d->udev,
+                        usb_rcvbulkpipe(d->udev, ep),
+                        junk, junk_len, &rd_count, timeout) < 0)
+                        break;
+                if (!rd_count)
+                        break;
+        }
+        kfree(junk);
+}
+
+static void cxusb_d680_dmb_drain_video(struct dvb_usb_device *d)
+{
+        struct usb_data_stream_properties *p = &d->props.adapter[0].stream;
+        const int timeout = 100;
+        const int junk_len = p->u.bulk.buffersize;
+        u8        *junk;
+        int       rd_count;
+
+        /* Discard remaining data in video pipe */
+        junk = kmalloc(junk_len, GFP_KERNEL);
+        if (!junk)
+                return;
+        while (1) {
+                if (usb_bulk_msg(d->udev,
+                        usb_rcvbulkpipe(d->udev, p->endpoint),
+                        junk, junk_len, &rd_count, timeout) < 0)
+                        break;
+                if (!rd_count)
+                        break;
+        }
+        kfree(junk);
+}
+
+static int cxusb_d680_dmb_streaming_ctrl(
+                struct dvb_usb_adapter *adap, int onoff)
+{
+        if (onoff) {
+                u8 buf[2] = { 0x03, 0x00 };
+                cxusb_d680_dmb_drain_video(adap->dev);
+                return cxusb_ctrl_msg(adap->dev, CMD_STREAMING_ON,
+                        buf, sizeof(buf), NULL, 0);
+        } else {
+                int ret = cxusb_ctrl_msg(adap->dev,
+                        CMD_STREAMING_OFF, NULL, 0, NULL, 0);
+                return ret;
+        }
+}
+
 static int cxusb_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 {
         struct dvb_usb_rc_key *keymap = d->props.rc_key_map;
@@ -337,6 +432,32 @@ static int cxusb_bluebird2_rc_query(struct dvb_usb_device *d, u32 *event,
         return 0;
 }
 
+static int cxusb_d680_dmb_rc_query(struct dvb_usb_device *d, u32 *event,
+                int *state)
+{
+        struct dvb_usb_rc_key *keymap = d->props.rc_key_map;
+        u8 ircode[2];
+        int i;
+
+        *event = 0;
+        *state = REMOTE_NO_KEY_PRESSED;
+
+        if (cxusb_ctrl_msg(d, 0x10, NULL, 0, ircode, 2) < 0)
+                return 0;
+
+        for (i = 0; i < d->props.rc_key_map_size; i++) {
+                if (keymap[i].custom == ircode[0] &&
+                    keymap[i].data == ircode[1]) {
+                        *event = keymap[i].event;
+                        *state = REMOTE_KEY_PRESSED;
+
+                        return 0;
+                }
+        }
+
+        return 0;
+}
+
 static struct dvb_usb_rc_key dvico_mce_rc_keys[] = {
         { 0xfe, 0x02, KEY_TV },
         { 0xfe, 0x0e, KEY_MP3 },
@@ -424,6 +545,44 @@ static struct dvb_usb_rc_key dvico_portable_rc_keys[] = {
         { 0xfc, 0x00, KEY_UNKNOWN },    /* HD */
 };
 
+static struct dvb_usb_rc_key d680_dmb_rc_keys[] = {
+        { 0x00, 0x38, KEY_UNKNOWN },    /* TV/AV */
+        { 0x08, 0x0c, KEY_ZOOM },
+        { 0x08, 0x00, KEY_0 },
+        { 0x00, 0x01, KEY_1 },
+        { 0x08, 0x02, KEY_2 },
+        { 0x00, 0x03, KEY_3 },
+        { 0x08, 0x04, KEY_4 },
+        { 0x00, 0x05, KEY_5 },
+        { 0x08, 0x06, KEY_6 },
+        { 0x00, 0x07, KEY_7 },
+        { 0x08, 0x08, KEY_8 },
+        { 0x00, 0x09, KEY_9 },
+        { 0x00, 0x0a, KEY_MUTE },
+        { 0x08, 0x29, KEY_BACK },
+        { 0x00, 0x12, KEY_CHANNELUP },
+        { 0x08, 0x13, KEY_CHANNELDOWN },
+        { 0x00, 0x2b, KEY_VOLUMEUP },
+        { 0x08, 0x2c, KEY_VOLUMEDOWN },
+        { 0x00, 0x20, KEY_UP },
+        { 0x08, 0x21, KEY_DOWN },
+        { 0x00, 0x11, KEY_LEFT },
+        { 0x08, 0x10, KEY_RIGHT },
+        { 0x00, 0x0d, KEY_OK },
+        { 0x08, 0x1f, KEY_RECORD },
+        { 0x00, 0x17, KEY_PLAYPAUSE },
+        { 0x08, 0x16, KEY_PLAYPAUSE },
+        { 0x00, 0x0b, KEY_STOP },
+        { 0x08, 0x27, KEY_FASTFORWARD },
+        { 0x00, 0x26, KEY_REWIND },
+        { 0x08, 0x1e, KEY_UNKNOWN },    /* Time Shift */
+        { 0x00, 0x0e, KEY_UNKNOWN },    /* Snapshot */
+        { 0x08, 0x2d, KEY_UNKNOWN },    /* Mouse Cursor */
+        { 0x00, 0x0f, KEY_UNKNOWN },    /* Minimize/Maximize */
+        { 0x08, 0x14, KEY_UNKNOWN },    /* Shuffle */
+        { 0x00, 0x25, KEY_POWER },
+};
+
 static int cxusb_dee1601_demod_init(struct dvb_frontend* fe)
 {
         static u8 clock_config []  = { CLOCK_CTL,  0x38, 0x28 };
@@ -529,6 +688,24 @@ static struct mxl5005s_config aver_a868r_tuner = {
         .AgcMasterByte   = 0x00,
 };
 
+/* FIXME: needs tweaking */
+static struct mxl5005s_config d680_dmb_tuner = {
+        .i2c_address     = 0x63,
+        .if_freq         = 36125000UL,
+        .xtal_freq       = CRYSTAL_FREQ_16000000HZ,
+        .agc_mode        = MXL_SINGLE_AGC,
+        .tracking_filter = MXL_TF_C,
+        .rssi_enable     = MXL_RSSI_ENABLE,
+        .cap_select      = MXL_CAP_SEL_ENABLE,
+        .div_out         = MXL_DIV_OUT_4,
+        .clock_out       = MXL_CLOCK_OUT_DISABLE,
+        .output_load     = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
+        .top             = MXL5005S_TOP_25P2,
+        .mod_mode        = MXL_DIGITAL_MODE,
+        .if_mode         = MXL_ZERO_IF,
+        .AgcMasterByte   = 0x00,
+};
+
 /* Callbacks for DVB USB */
 static int cxusb_fmd1216me_tuner_attach(struct dvb_usb_adapter *adap)
 {
@@ -617,6 +794,14 @@ static int cxusb_mxl5003s_tuner_attach(struct dvb_usb_adapter *adap)
         return 0;
 }
 
+static int cxusb_d680_dmb_tuner_attach(struct dvb_usb_adapter *adap)
+{
+        struct dvb_frontend *fe;
+        fe = dvb_attach(mxl5005s_attach, adap->fe,
+                        &adap->dev->i2c_adap, &d680_dmb_tuner);
+        return (fe == NULL) ? -EIO : 0;
+}
+
 static int cxusb_cx22702_frontend_attach(struct dvb_usb_adapter *adap)
 {
         u8 b;
@@ -906,6 +1091,54 @@ static int cxusb_nano2_frontend_attach(struct dvb_usb_adapter *adap)
         return -EIO;
 }
 
+static struct lgs8gl5_config lgs8gl5_cfg = {
+        .demod_address = 0x19,
+};
+
+static int cxusb_d680_dmb_frontend_attach(struct dvb_usb_adapter *adap)
+{
+        struct dvb_usb_device *d = adap->dev;
+        int n;
+
+        /* Select required USB configuration */
+        if (usb_set_interface(d->udev, 0, 0) < 0)
+                err("set interface failed");
+
+        /* Unblock all USB pipes */
+        usb_clear_halt(d->udev,
+                usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
+        usb_clear_halt(d->udev,
+                usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
+        usb_clear_halt(d->udev,
+                usb_rcvbulkpipe(d->udev, d->props.adapter[0].stream.endpoint));
+
+        /* Drain USB pipes to avoid hang after reboot */
+        for (n = 0;  n < 5;  n++) {
+                cxusb_d680_dmb_drain_message(d);
+                cxusb_d680_dmb_drain_video(d);
+                msleep(200);
+        }
+
+        /* Reset the tuner */
+        if (cxusb_d680_dmb_gpio_tuner(d, 0x07, 0) < 0) {
+                err("clear tuner gpio failed");
+                return -EIO;
+        }
+        msleep(100);
+        if (cxusb_d680_dmb_gpio_tuner(d, 0x07, 1) < 0) {
+                err("set tuner gpio failed");
+                return -EIO;
+        }
+        msleep(100);
+
+        /* Attach frontend */
+        adap->fe = dvb_attach(lgs8gl5_attach, &lgs8gl5_cfg, &d->i2c_adap);
+        if (adap->fe == NULL)
+                return -EIO;
+
+        return 0;
+}
+
 /*
  * DViCO has shipped two devices with the same USB ID, but only one of them
  * needs a firmware download.  Check the device class details to see if they
@@ -985,6 +1218,7 @@ static struct dvb_usb_device_properties cxusb_bluebird_dualdig4_rev2_properties;
 static struct dvb_usb_device_properties cxusb_bluebird_nano2_properties;
 static struct dvb_usb_device_properties cxusb_bluebird_nano2_needsfirmware_properties;
 static struct dvb_usb_device_properties cxusb_aver_a868r_properties;
+static struct dvb_usb_device_properties cxusb_d680_dmb_properties;
 
 static int cxusb_probe(struct usb_interface *intf,
                        const struct usb_device_id *id)
@@ -1011,6 +1245,8 @@ static int cxusb_probe(struct usb_interface *intf,
             0 == dvb_usb_device_init(intf,
                                      &cxusb_bluebird_dualdig4_rev2_properties,
                                      THIS_MODULE, NULL, adapter_nr) ||
+            0 == dvb_usb_device_init(intf, &cxusb_d680_dmb_properties,
+                                     THIS_MODULE, NULL, adapter_nr) ||
             0)
                 return 0;
 
@@ -1036,6 +1272,7 @@ static struct usb_device_id cxusb_table [] = {
         { USB_DEVICE(USB_VID_DVICO, USB_PID_DVICO_BLUEBIRD_DVB_T_NANO_2_NFW_WARM) },
         { USB_DEVICE(USB_VID_AVERMEDIA, USB_PID_AVERMEDIA_VOLAR_A868R) },
         { USB_DEVICE(USB_VID_DVICO, USB_PID_DVICO_BLUEBIRD_DUAL_4_REV_2) },
+        { USB_DEVICE(USB_VID_CONEXANT, USB_PID_CONEXANT_D680_DMB) },
         {}              /* Terminating entry */
 };
 MODULE_DEVICE_TABLE (usb, cxusb_table);
@@ -1530,6 +1767,55 @@ struct dvb_usb_device_properties cxusb_bluebird_dualdig4_rev2_properties = {
         }
 };
 
+static struct dvb_usb_device_properties cxusb_d680_dmb_properties = {
+        .caps = DVB_USB_IS_AN_I2C_ADAPTER,
+
+        .usb_ctrl         = CYPRESS_FX2,
+
+        .size_of_priv     = sizeof(struct cxusb_state),
+
+        .num_adapters = 1,
+        .adapter = {
+                {
+                        .streaming_ctrl   = cxusb_d680_dmb_streaming_ctrl,
+                        .frontend_attach  = cxusb_d680_dmb_frontend_attach,
+                        .tuner_attach     = cxusb_d680_dmb_tuner_attach,
+
+                        /* parameter for the MPEG2-data transfer */
+                        .stream = {
+                                .type = USB_BULK,
+                                .count = 5,
+                                .endpoint = 0x02,
+                                .u = {
+                                        .bulk = {
+                                                .buffersize = 8192,
+                                        }
+                                }
+                        },
+                },
+        },
+
+        .power_ctrl       = cxusb_d680_dmb_power_ctrl,
+
+        .i2c_algo         = &cxusb_i2c_algo,
+
+        .generic_bulk_ctrl_endpoint = 0x01,
+
+        .rc_interval      = 100,
+        .rc_key_map       = d680_dmb_rc_keys,
+        .rc_key_map_size  = ARRAY_SIZE(d680_dmb_rc_keys),
+        .rc_query         = cxusb_d680_dmb_rc_query,
+
+        .num_device_descs = 1,
+        .devices = {
+                {
+                        "Conexant DMB-TH Stick",
+                        { NULL },
+                        { &cxusb_table[18], NULL },
+                },
+        }
+};
+
 static struct usb_driver cxusb_driver = {
         .name           = "dvb_usb_cxusb",
         .probe          = cxusb_probe,
diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-ids.h b/drivers/media/dvb/dvb-usb/dvb-usb-ids.h
index f327a154b6c6..81369b79e75a 100644
--- a/drivers/media/dvb/dvb-usb/dvb-usb-ids.h
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-ids.h
@@ -22,6 +22,7 @@
 #define USB_VID_AVERMEDIA                       0x07ca
 #define USB_VID_COMPRO                          0x185b
 #define USB_VID_COMPRO_UNK                      0x145f
+#define USB_VID_CONEXANT                        0x0572
 #define USB_VID_CYPRESS                         0x04b4
 #define USB_VID_DIBCOM                          0x10b8
 #define USB_VID_DPOSH                           0x1498
@@ -69,6 +70,7 @@
 #define USB_PID_COMPRO_DVBU2000_UNK_WARM                0x010d
 #define USB_PID_COMPRO_VIDEOMATE_U500                   0x1e78
 #define USB_PID_COMPRO_VIDEOMATE_U500_PC                0x1e80
+#define USB_PID_CONEXANT_D680_DMB                       0x86d6
 #define USB_PID_DIBCOM_HOOK_DEFAULT                     0x0064
 #define USB_PID_DIBCOM_HOOK_DEFAULT_REENUM              0x0065
 #define USB_PID_DIBCOM_MOD3000_COLD                     0x0bb8
diff --git a/drivers/media/dvb/frontends/Kconfig b/drivers/media/dvb/frontends/Kconfig
index 7dbb4a223c99..774f5c2a71e8 100644
--- a/drivers/media/dvb/frontends/Kconfig
+++ b/drivers/media/dvb/frontends/Kconfig
@@ -385,4 +385,11 @@ config DVB_ISL6421
         help
           An SEC control chip.
 
+config DVB_LGS8GL5
+        tristate "Silicon Legend LGS-8GL5 demodulator (OFDM)"
+        depends on DVB_CORE && I2C
+        default m if DVB_FE_CUSTOMISE
+        help
+          A DMB-TH tuner module. Say Y when you want to support this frontend.
+
 endmenu
diff --git a/drivers/media/dvb/frontends/Makefile b/drivers/media/dvb/frontends/Makefile
index 028da55611c0..262eaa429f5d 100644
--- a/drivers/media/dvb/frontends/Makefile
+++ b/drivers/media/dvb/frontends/Makefile
@@ -48,3 +48,4 @@ obj-$(CONFIG_DVB_TUNER_ITD1000) += itd1000.o
 obj-$(CONFIG_DVB_AU8522) += au8522.o
 obj-$(CONFIG_DVB_TDA10048) += tda10048.o
 obj-$(CONFIG_DVB_S5H1411) += s5h1411.o
+obj-$(CONFIG_DVB_LGS8GL5) += lgs8gl5.o
diff --git a/drivers/media/dvb/frontends/lgs8gl5.c b/drivers/media/dvb/frontends/lgs8gl5.c
new file mode 100644
index 000000000000..c0a223d28b0f
--- /dev/null
+++ b/drivers/media/dvb/frontends/lgs8gl5.c
@@ -0,0 +1,480 @@
+/*
+    Legend Silicon LGS-8GL5 DMB-TH OFDM demodulator driver
+
+    Copyright (C) 2008 Sirius International (Hong Kong) Limited
+        Timothy Lee <timothy.lee@siriushk.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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include "dvb_frontend.h"
+#include "lgs8gl5.h"
+
+
+#define REG_RESET               0x02
+#define REG_RESET_OFF                   0x01
+#define REG_03                  0x03
+#define REG_04                  0x04
+#define REG_07                  0x07
+#define REG_09                  0x09
+#define REG_0A                  0x0a
+#define REG_0B                  0x0b
+#define REG_0C                  0x0c
+#define REG_37                  0x37
+#define REG_STRENGTH            0x4b
+#define REG_STRENGTH_MASK               0x7f
+#define REG_STRENGTH_CARRIER            0x80
+#define REG_INVERSION           0x7c
+#define REG_INVERSION_ON                0x80
+#define REG_7D                  0x7d
+#define REG_7E                  0x7e
+#define REG_A2                  0xa2
+#define REG_STATUS              0xa4
+#define REG_STATUS_SYNC         0x04
+#define REG_STATUS_LOCK         0x01
+
+
+struct lgs8gl5_state {
+        struct i2c_adapter *i2c;
+        const struct lgs8gl5_config *config;
+        struct dvb_frontend frontend;
+};
+
+
+static int debug;
+#define dprintk(args...) \
+        do { \
+                if (debug) \
+                        printk(KERN_DEBUG "lgs8gl5: " args); \
+        } while (0)
+
+
+/* Writes into demod's register */
+static int
+lgs8gl5_write_reg(struct lgs8gl5_state *state, u8 reg, u8 data)
+{
+        int ret;
+        u8 buf[] = {reg, data};
+        struct i2c_msg msg = {
+                .addr  = state->config->demod_address,
+                .flags = 0,
+                .buf   = buf,
+                .len   = 2
+        };
+
+        ret = i2c_transfer(state->i2c, &msg, 1);
+        if (ret != 1)
+                dprintk("%s: error (reg=0x%02x, val=0x%02x, ret=%i)\n",
+                        __func__, reg, data, ret);
+        return (ret != 1) ? -1 : 0;
+}
+
+
+/* Reads from demod's register */
+static int
+lgs8gl5_read_reg(struct lgs8gl5_state *state, u8 reg)
+{
+        int ret, j;
+        u8 b0[] = {reg};
+        u8 b1[] = {0};
+        struct i2c_msg msg[2] = {
+                {
+                        .addr  = state->config->demod_address,
+                        .flags = 0,
+                        .buf   = b0,
+                        .len   = 1
+                },
+                {
+                        .addr  = state->config->demod_address,
+                        .flags = I2C_M_RD,
+                        .buf   = b1,
+                        .len   = 1
+                }
+        };
+
+        ret = i2c_transfer(state->i2c, msg, 2);
+        if (ret != 2)
+                return -EIO;
+
+        return b1[0];
+}
+
+
+static int
+lgs8gl5_update_reg(struct lgs8gl5_state *state, u8 reg, u8 data)
+{
+        lgs8gl5_read_reg(state, reg);
+        lgs8gl5_write_reg(state, reg, data);
+        return 0;
+}
+
+
+/* Writes into alternate device's register */
+/* TODO:  Find out what that device is for! */
+static int
+lgs8gl5_update_alt_reg(struct lgs8gl5_state *state, u8 reg, u8 data)
+{
+        int ret, j;
+        u8 b0[] = {reg};
+        u8 b1[] = {0};
+        u8 b2[] = {reg, data};
+        struct i2c_msg msg[3] = {
+                {
+                        .addr  = state->config->demod_address + 2,
+                        .flags = 0,
+                        .buf   = b0,
+                        .len   = 1
+                },
+                {
+                        .addr  = state->config->demod_address + 2,
+                        .flags = I2C_M_RD,
+                        .buf   = b1,
+                        .len   = 1
+                },
+                {
+                        .addr  = state->config->demod_address + 2,
+                        .flags = 0,
+                        .buf   = b2,
+                        .len   = 2
+                },
+        };
+
+        ret = i2c_transfer(state->i2c, msg, 3);
+        return (ret != 3) ? -1 : 0;
+}
+
+
+static void
+lgs8gl5_soft_reset(struct lgs8gl5_state *state)
+{
+        u8 val;
+
+        dprintk("%s\n", __func__);
+
+        val = lgs8gl5_read_reg(state, REG_RESET);
+        lgs8gl5_write_reg(state, REG_RESET, val & ~REG_RESET_OFF);
+        lgs8gl5_write_reg(state, REG_RESET, val | REG_RESET_OFF);
+        msleep(5);
+}
+
+
+static int
+lgs8gl5_set_inversion(struct lgs8gl5_state *state, int inversion)
+{
+        u8 val;
+
+        dprintk("%s\n", __func__);
+
+        switch (inversion) {
+        case INVERSION_AUTO:
+                return -EOPNOTSUPP;
+        case INVERSION_ON:
+                val = lgs8gl5_read_reg(state, REG_INVERSION);
+                return lgs8gl5_write_reg(state, REG_INVERSION,
+                        val | REG_INVERSION_ON);
+        case INVERSION_OFF:
+                val = lgs8gl5_read_reg(state, REG_INVERSION);
+                return lgs8gl5_write_reg(state, REG_INVERSION,
+                        val & ~REG_INVERSION_ON);
+        default:
+                return -EINVAL;
+        }
+}
+
+
+/* Starts demodulation */
+static void
+lgs8gl5_start_demod(struct lgs8gl5_state *state)
+{
+        u8  val;
+        int n;
+
+        dprintk("%s\n", __func__);
+
+        lgs8gl5_update_alt_reg(state, 0xc2, 0x28);
+        lgs8gl5_soft_reset(state);
+        lgs8gl5_update_reg(state, REG_07, 0x10);
+        lgs8gl5_update_reg(state, REG_07, 0x10);
+        lgs8gl5_write_reg(state, REG_09, 0x0e);
+        lgs8gl5_write_reg(state, REG_0A, 0xe5);
+        lgs8gl5_write_reg(state, REG_0B, 0x35);
+        lgs8gl5_write_reg(state, REG_0C, 0x30);
+
+        lgs8gl5_update_reg(state, REG_03, 0x00);
+        lgs8gl5_update_reg(state, REG_7E, 0x01);
+        lgs8gl5_update_alt_reg(state, 0xc5, 0x00);
+        lgs8gl5_update_reg(state, REG_04, 0x02);
+        lgs8gl5_update_reg(state, REG_37, 0x01);
+        lgs8gl5_soft_reset(state);
+
+        /* Wait for carrier */
+        for (n = 0;  n < 10;  n++) {
+                val = lgs8gl5_read_reg(state, REG_STRENGTH);
+                dprintk("Wait for carrier[%d] 0x%02X\n", n, val);
+                if (val & REG_STRENGTH_CARRIER)
+                        break;
+                msleep(4);
+        }
+        if (!(val & REG_STRENGTH_CARRIER))
+                return;
+
+        /* Wait for lock */
+        for (n = 0;  n < 20;  n++) {
+                val = lgs8gl5_read_reg(state, REG_STATUS);
+                dprintk("Wait for lock[%d] 0x%02X\n", n, val);
+                if (val & REG_STATUS_LOCK)
+                        break;
+                msleep(12);
+        }
+        if (!(val & REG_STATUS_LOCK))
+                return;
+
+        lgs8gl5_write_reg(state, REG_7D, lgs8gl5_read_reg(state, REG_A2));
+        lgs8gl5_soft_reset(state);
+}
+
+
+static int
+lgs8gl5_init(struct dvb_frontend *fe)
+{
+        struct lgs8gl5_state *state = fe->demodulator_priv;
+
+        dprintk("%s\n", __func__);
+
+        lgs8gl5_update_alt_reg(state, 0xc2, 0x28);
+        lgs8gl5_soft_reset(state);
+        lgs8gl5_update_reg(state, REG_07, 0x10);
+        lgs8gl5_update_reg(state, REG_07, 0x10);
+        lgs8gl5_write_reg(state, REG_09, 0x0e);
+        lgs8gl5_write_reg(state, REG_0A, 0xe5);
+        lgs8gl5_write_reg(state, REG_0B, 0x35);
+        lgs8gl5_write_reg(state, REG_0C, 0x30);
+
+        return 0;
+}
+
+
+static int
+lgs8gl5_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+        struct lgs8gl5_state *state = fe->demodulator_priv;
+        u8 level = lgs8gl5_read_reg(state, REG_STRENGTH);
+        u8 flags = lgs8gl5_read_reg(state, REG_STATUS);
+
+        *status = 0;
+
+        if ((level & REG_STRENGTH_MASK) > 0)
+                *status |= FE_HAS_SIGNAL;
+        if (level & REG_STRENGTH_CARRIER)
+                *status |= FE_HAS_CARRIER;
+        if (flags & REG_STATUS_SYNC)
+                *status |= FE_HAS_SYNC;
+        if (flags & REG_STATUS_LOCK)
+                *status |= FE_HAS_LOCK;
+
+        return 0;
+}
+
+
+static int
+lgs8gl5_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+        struct lgs8gl5_state *state = fe->demodulator_priv;
+        *ber = 0;
+
+        return 0;
+}
+
+
+static int
+lgs8gl5_read_signal_strength(struct dvb_frontend *fe, u16 *signal_strength)
+{
+        struct lgs8gl5_state *state = fe->demodulator_priv;
+        u8 level = lgs8gl5_read_reg(state, REG_STRENGTH);
+        *signal_strength = (level & REG_STRENGTH_MASK) << 8;
+
+        return 0;
+}
+
+
+static int
+lgs8gl5_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+        struct lgs8gl5_state *state = fe->demodulator_priv;
+        u8 level = lgs8gl5_read_reg(state, REG_STRENGTH);
+        *snr = (level & REG_STRENGTH_MASK) << 8;
+
+        return 0;
+}
+
+
+static int
+lgs8gl5_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+        struct lgs8gl5_state *state = fe->demodulator_priv;
+        *ucblocks = 0;
+
+        return 0;
+}
+
+
+static int
+lgs8gl5_set_frontend(struct dvb_frontend *fe,
+                struct dvb_frontend_parameters *p)
+{
+        struct lgs8gl5_state *state = fe->demodulator_priv;
+
+        dprintk("%s\n", __func__);
+
+        if (p->u.ofdm.bandwidth != BANDWIDTH_8_MHZ)
+                return -EINVAL;
+
+        if (fe->ops.tuner_ops.set_params) {
+                fe->ops.tuner_ops.set_params(fe, p);
+                if (fe->ops.i2c_gate_ctrl)
+                        fe->ops.i2c_gate_ctrl(fe, 0);
+        }
+
+        /* lgs8gl5_set_inversion(state, p->inversion); */
+
+        lgs8gl5_start_demod(state);
+
+        return 0;
+}
+
+
+static int
+lgs8gl5_get_frontend(struct dvb_frontend *fe,
+                struct dvb_frontend_parameters *p)
+{
+        struct lgs8gl5_state *state = fe->demodulator_priv;
+        u8 inv = lgs8gl5_read_reg(state, REG_INVERSION);
+        struct dvb_ofdm_parameters *o = &p->u.ofdm;
+
+        p->inversion = (inv & REG_INVERSION_ON) ? INVERSION_ON : INVERSION_OFF;
+
+        o->code_rate_HP = FEC_1_2;
+        o->code_rate_LP = FEC_7_8;
+        o->guard_interval = GUARD_INTERVAL_1_32;
+        o->transmission_mode = TRANSMISSION_MODE_2K;
+        o->constellation = QAM_64;
+        o->hierarchy_information = HIERARCHY_NONE;
+        o->bandwidth = BANDWIDTH_8_MHZ;
+
+        return 0;
+}
+
+
+static int
+lgs8gl5_get_tune_settings(struct dvb_frontend *fe,
+                struct dvb_frontend_tune_settings *fesettings)
+{
+        fesettings->min_delay_ms = 240;
+        fesettings->step_size    = 0;
+        fesettings->max_drift    = 0;
+        return 0;
+}
+
+
+static void
+lgs8gl5_release(struct dvb_frontend *fe)
+{
+        struct lgs8gl5_state *state = fe->demodulator_priv;
+        kfree(state);
+}
+
+
+static struct dvb_frontend_ops lgs8gl5_ops;
+
+
+struct dvb_frontend*
+lgs8gl5_attach(const struct lgs8gl5_config *config, struct i2c_adapter *i2c)
+{
+        struct lgs8gl5_state *state = NULL;
+
+        dprintk("%s\n", __func__);
+
+        /* Allocate memory for the internal state */
+        state = kmalloc(sizeof(struct lgs8gl5_state), GFP_KERNEL);
+        if (state == NULL)
+                goto error;
+
+        /* Setup the state */
+        state->config = config;
+        state->i2c    = i2c;
+
+        /* Check if the demod is there */
+        if (lgs8gl5_read_reg(state, REG_RESET) < 0)
+                goto error;
+
+        /* Create dvb_frontend */
+        memcpy(&state->frontend.ops, &lgs8gl5_ops,
+                sizeof(struct dvb_frontend_ops));
+        state->frontend.demodulator_priv = state;
+        return &state->frontend;
+
+error:
+        kfree(state);
+        return NULL;
+}
+EXPORT_SYMBOL(lgs8gl5_attach);
+
+
+static struct dvb_frontend_ops lgs8gl5_ops = {
+        .info = {
+                .name                   = "Legend Silicon LGS-8GL5 DMB-TH",
+                .type                   = FE_OFDM,
+                .frequency_min          = 474000000,
+                .frequency_max          = 858000000,
+                .frequency_stepsize     = 10000,
+                .frequency_tolerance    = 0,
+                .caps = FE_CAN_FEC_AUTO |
+                        FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_32 |
+                        FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
+                        FE_CAN_TRANSMISSION_MODE_AUTO |
+                        FE_CAN_BANDWIDTH_AUTO |
+                        FE_CAN_GUARD_INTERVAL_AUTO |
+                        FE_CAN_HIERARCHY_AUTO |
+                        FE_CAN_RECOVER
+        },
+
+        .release = lgs8gl5_release,
+
+        .init = lgs8gl5_init,
+
+        .set_frontend = lgs8gl5_set_frontend,
+        .get_frontend = lgs8gl5_get_frontend,
+        .get_tune_settings = lgs8gl5_get_tune_settings,
+
+        .read_status = lgs8gl5_read_status,
+        .read_ber = lgs8gl5_read_ber,
+        .read_signal_strength = lgs8gl5_read_signal_strength,
+        .read_snr = lgs8gl5_read_snr,
+        .read_ucblocks = lgs8gl5_read_ucblocks,
+};
+
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("Legend Silicon LGS-8GL5 DMB-TH Demodulator driver");
+MODULE_AUTHOR("Timothy Lee");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/dvb/frontends/lgs8gl5.h b/drivers/media/dvb/frontends/lgs8gl5.h
new file mode 100644
index 000000000000..d14176787a7d
--- /dev/null
+++ b/drivers/media/dvb/frontends/lgs8gl5.h
@@ -0,0 +1,45 @@
+/*
+    Legend Silicon LGS-8GL5 DMB-TH OFDM demodulator driver
+
+    Copyright (C) 2008 Sirius International (Hong Kong) Limited
+        Timothy Lee <timothy.lee@siriushk.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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef LGS8GL5_H
+#define LGS8GL5_H
+
+#include <linux/dvb/frontend.h>
+
+struct lgs8gl5_config {
+        /* the demodulator's i2c address */
+        u8 demod_address;
+};
+
+#if defined(CONFIG_DVB_LGS8GL5) || \
+        (defined(CONFIG_DVB_LGS8GL5_MODULE) && defined(MODULE))
+extern struct dvb_frontend *lgs8gl5_attach(
+        const struct lgs8gl5_config *config, struct i2c_adapter *i2c);
+#else
+static inline struct dvb_frontend *lgs8gl5_attach(
+        const struct lgs8gl5_config *config, struct i2c_adapter *i2c) {
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return NULL;
+}
+#endif /* CONFIG_DVB_LGS8GL5 */
+
+#endif /* LGS8GL5_H */