V4L/DVB (6884): Add support for the Xceive xc5000 silicon tuner

This is an all formats tuner, QAM, ATSC, DVB-T and others.
Only ATSC and QAM have been tested.

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 802 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/xc5000.c b/drivers/media/dvb/frontends/xc5000.c
new file mode 100644
index 0000000..048f9a7
--- /dev/null
+++ b/drivers/media/dvb/frontends/xc5000.c
@@ -0,0 +1,802 @@
+/*
+ *  Driver for Xceive XC5000 "QAM/8VSB single chip tuner"
+ *
+ *  Copyright (c) 2007 Xceive Corporation
+ *  Copyright (c) 2007 Steven Toth <stoth@hauppauge.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/module.h>
+#include <linux/moduleparam.h>
+#include <linux/delay.h>
+#include <linux/dvb/frontend.h>
+#include <linux/i2c.h>
+
+#include "dvb_frontend.h"
+
+#include "xc5000.h"
+#include "xc5000_priv.h"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
+
+#define dprintk(level,fmt, arg...) if (debug >= level) \
+	printk(KERN_INFO "%s: " fmt, "xc5000", ## arg)
+
+#define XC5000_DEFAULT_FIRMWARE "dvb-fe-xc5000-1.1.fw"
+#define XC5000_DEFAULT_FIRMWARE_SIZE 12400
+
+/* Misc Defines */
+#define MAX_TV_STANDARD			23
+#define XC_MAX_I2C_WRITE_LENGTH		64
+
+/* Signal Types */
+#define XC_RF_MODE_AIR			0
+#define XC_RF_MODE_CABLE		1
+
+/* Result codes */
+#define XC_RESULT_SUCCESS		0
+#define XC_RESULT_RESET_FAILURE		1
+#define XC_RESULT_I2C_WRITE_FAILURE	2
+#define XC_RESULT_I2C_READ_FAILURE	3
+#define XC_RESULT_OUT_OF_RANGE		5
+
+/* Registers */
+#define XREG_INIT         0x00
+#define XREG_VIDEO_MODE   0x01
+#define XREG_AUDIO_MODE   0x02
+#define XREG_RF_FREQ      0x03
+#define XREG_D_CODE       0x04
+#define XREG_IF_OUT       0x05
+#define XREG_SEEK_MODE    0x07
+#define XREG_POWER_DOWN   0x0A
+#define XREG_SIGNALSOURCE 0x0D /* 0=Air, 1=Cable */
+#define XREG_SMOOTHEDCVBS 0x0E
+#define XREG_XTALFREQ     0x0F
+#define XREG_FINERFFREQ   0x10
+#define XREG_DDIMODE      0x11
+
+#define XREG_ADC_ENV      0x00
+#define XREG_QUALITY      0x01
+#define XREG_FRAME_LINES  0x02
+#define XREG_HSYNC_FREQ   0x03
+#define XREG_LOCK         0x04
+#define XREG_FREQ_ERROR   0x05
+#define XREG_SNR          0x06
+#define XREG_VERSION      0x07
+#define XREG_PRODUCT_ID   0x08
+#define XREG_BUSY         0x09
+
+/*
+   Basic firmware description. This will remain with
+   the driver for documentation purposes.
+
+   This represents an I2C firmware file encoded as a
+   string of unsigned char. Format is as follows:
+
+   char[0  ]=len0_MSB  -> len = len_MSB * 256 + len_LSB
+   char[1  ]=len0_LSB  -> length of first write transaction
+   char[2  ]=data0 -> first byte to be sent
+   char[3  ]=data1
+   char[4  ]=data2
+   char[   ]=...
+   char[M  ]=dataN  -> last byte to be sent
+   char[M+1]=len1_MSB  -> len = len_MSB * 256 + len_LSB
+   char[M+2]=len1_LSB  -> length of second write transaction
+   char[M+3]=data0
+   char[M+4]=data1
+   ...
+   etc.
+
+   The [len] value should be interpreted as follows:
+
+   len= len_MSB _ len_LSB
+   len=1111_1111_1111_1111   : End of I2C_SEQUENCE
+   len=0000_0000_0000_0000   : Reset command: Do hardware reset
+   len=0NNN_NNNN_NNNN_NNNN   : Normal transaction: number of bytes = {1:32767)
+   len=1WWW_WWWW_WWWW_WWWW   : Wait command: wait for {1:32767} ms
+
+   For the RESET and WAIT commands, the two following bytes will contain
+   immediately the length of the following transaction.
+
+*/
+typedef struct {
+	char *Name;
+	unsigned short AudioMode;
+	unsigned short VideoMode;
+} XC_TV_STANDARD;
+
+/* Tuner standards */
+#define DTV6	17
+
+XC_TV_STANDARD XC5000_Standard[MAX_TV_STANDARD] = {
+	{"M/N-NTSC/PAL-BTSC", 0x0400, 0x8020},
+	{"M/N-NTSC/PAL-A2",   0x0600, 0x8020},
+	{"M/N-NTSC/PAL-EIAJ", 0x0440, 0x8020},
+	{"M/N-NTSC/PAL-Mono", 0x0478, 0x8020},
+	{"B/G-PAL-A2",        0x0A00, 0x8049},
+	{"B/G-PAL-NICAM",     0x0C04, 0x8049},
+	{"B/G-PAL-MONO",      0x0878, 0x8059},
+	{"I-PAL-NICAM",       0x1080, 0x8009},
+	{"I-PAL-NICAM-MONO",  0x0E78, 0x8009},
+	{"D/K-PAL-A2",        0x1600, 0x8009},
+	{"D/K-PAL-NICAM",     0x0E80, 0x8009},
+	{"D/K-PAL-MONO",      0x1478, 0x8009},
+	{"D/K-SECAM-A2 DK1",  0x1200, 0x8009},
+	{"D/K-SECAM-A2 L/DK3",0x0E00, 0x8009},
+	{"D/K-SECAM-A2 MONO", 0x1478, 0x8009},
+	{"L-SECAM-NICAM",     0x8E82, 0x0009},
+	{"L'-SECAM-NICAM",    0x8E82, 0x4009},
+	{"DTV6",              0x00C0, 0x8002},
+	{"DTV8",              0x00C0, 0x800B},
+	{"DTV7/8",            0x00C0, 0x801B},
+	{"DTV7",              0x00C0, 0x8007},
+	{"FM Radio-INPUT2",   0x9802, 0x9002},
+	{"FM Radio-INPUT1",   0x0208, 0x9002}
+};
+
+static int  xc5000_writeregs(struct xc5000_priv *priv, u8 *buf, u8 len);
+static int  xc5000_readregs(struct xc5000_priv *priv, u8 *buf, u8 len);
+static void xc5000_TunerReset(struct dvb_frontend *fe);
+
+int xc_send_i2c_data(struct xc5000_priv *priv,
+	unsigned char *bytes_to_send, int nb_bytes_to_send)
+{
+	return xc5000_writeregs(priv, bytes_to_send, nb_bytes_to_send)
+		? XC_RESULT_I2C_WRITE_FAILURE : XC_RESULT_SUCCESS;
+}
+
+int xc_read_i2c_data(struct xc5000_priv *priv, unsigned char *bytes_received,
+	int nb_bytes_to_receive)
+{
+	return xc5000_readregs(priv, bytes_received, nb_bytes_to_receive)
+		? XC_RESULT_I2C_READ_FAILURE : XC_RESULT_SUCCESS;
+}
+
+int xc_reset(struct dvb_frontend *fe)
+{
+	xc5000_TunerReset(fe);
+	return XC_RESULT_SUCCESS;
+}
+
+void xc_wait(int wait_ms)
+{
+	msleep( wait_ms );
+}
+
+static void xc5000_TunerReset(struct dvb_frontend *fe)
+{
+	struct xc5000_priv *priv = fe->tuner_priv;
+	int ret;
+
+	dprintk(1, "%s()\n", __FUNCTION__);
+
+	if(priv->cfg->tuner_reset) {
+		ret = priv->cfg->tuner_reset(fe);
+		if (ret)
+			printk(KERN_ERR "xc5000: reset failed\n");
+	} else
+		printk(KERN_ERR "xc5000: no tuner reset function, fatal\n");
+}
+
+int xc_write_reg(struct xc5000_priv *priv, unsigned short int regAddr,
+	unsigned short int i2cData)
+{
+	unsigned char buf[4];
+	int WatchDogTimer = 5;
+	int result;
+
+	buf[0] = (regAddr >> 8) & 0xFF;
+	buf[1] = regAddr & 0xFF;
+	buf[2] = (i2cData >> 8) & 0xFF;
+	buf[3] = i2cData & 0xFF;
+	result = xc_send_i2c_data(priv, buf, 4);
+	if ( result == XC_RESULT_SUCCESS) {
+		/* wait for busy flag to clear */
+		while ((WatchDogTimer > 0) && (result == XC_RESULT_SUCCESS)) {
+			buf[0] = 0;
+			buf[1] = XREG_BUSY;
+
+			result = xc_send_i2c_data(priv, buf, 2);
+			if (result == XC_RESULT_SUCCESS) {
+				result = xc_read_i2c_data(priv, buf, 2);
+				if (result == XC_RESULT_SUCCESS) {
+					if ((buf[0] == 0) && (buf[1] == 0)) {
+						/* busy flag cleared */
+					break;
+					} else {
+						xc_wait(100); /* wait 5 ms */
+						WatchDogTimer--;
+					}
+				}
+			}
+		}
+	}
+	if (WatchDogTimer < 0)
+		result = XC_RESULT_I2C_WRITE_FAILURE;
+
+	return result;
+}
+
+int xc_read_reg(struct xc5000_priv *priv, unsigned short int regAddr,
+	unsigned short int *i2cData)
+{
+	unsigned char buf[2];
+	int result;
+
+	buf[0] = (regAddr >> 8) & 0xFF;
+	buf[1] = regAddr & 0xFF;
+	result = xc_send_i2c_data(priv, buf, 2);
+	if (result!=XC_RESULT_SUCCESS)
+		return result;
+
+	result = xc_read_i2c_data(priv, buf, 2);
+	if (result!=XC_RESULT_SUCCESS)
+		return result;
+
+	*i2cData = buf[0] * 256 + buf[1];
+	return result;
+}
+
+int xc_load_i2c_sequence(struct dvb_frontend *fe, unsigned char i2c_sequence[])
+{
+	struct xc5000_priv *priv = fe->tuner_priv;
+
+	int i, nbytes_to_send, result;
+	unsigned int len, pos, index;
+	unsigned char buf[XC_MAX_I2C_WRITE_LENGTH];
+
+	index=0;
+	while ((i2c_sequence[index]!=0xFF) || (i2c_sequence[index+1]!=0xFF)) {
+
+		len = i2c_sequence[index]* 256 + i2c_sequence[index+1];
+		if (len==0x0000) {
+			/* RESET command */
+			result = xc_reset(fe);
+			index += 2;
+			if (result!=XC_RESULT_SUCCESS)
+				return result;
+		} else if (len & 0x8000) {
+			/* WAIT command */
+			xc_wait(len & 0x7FFF);
+			index += 2;
+		} else {
+			/* Send i2c data whilst ensuring individual transactions
+			 * do not exceed XC_MAX_I2C_WRITE_LENGTH bytes.
+			 */
+			index += 2;
+			buf[0] = i2c_sequence[index];
+			buf[1] = i2c_sequence[index + 1];
+			pos = 2;
+			while (pos < len) {
+				if ((len - pos) > XC_MAX_I2C_WRITE_LENGTH - 2) {
+					nbytes_to_send = XC_MAX_I2C_WRITE_LENGTH;
+				} else {
+					nbytes_to_send = (len - pos + 2);
+				}
+				for (i=2; i<nbytes_to_send; i++) {
+					buf[i] = i2c_sequence[index + pos + i - 2];
+				}
+				result = xc_send_i2c_data(priv, buf, nbytes_to_send);
+
+				if (result!=XC_RESULT_SUCCESS)
+					return result;
+
+				pos += nbytes_to_send - 2;
+			}
+			index += len;
+		}
+	}
+	return XC_RESULT_SUCCESS;
+}
+
+int xc_initialize(struct xc5000_priv *priv)
+{
+	dprintk(1, "%s()\n", __FUNCTION__);
+	return xc_write_reg(priv, XREG_INIT, 0);
+}
+
+int xc_SetTVStandard(struct xc5000_priv *priv, unsigned short int VideoMode,
+	unsigned short int AudioMode)
+{
+	int ret;
+	dprintk(1, "%s(%d,%d)\n", __FUNCTION__, VideoMode, AudioMode);
+	dprintk(1, "%s() Standard = %s\n",
+		__FUNCTION__,
+		XC5000_Standard[priv->video_standard].Name);
+
+	ret = xc_write_reg(priv, XREG_VIDEO_MODE, VideoMode);
+	if (ret == XC_RESULT_SUCCESS)
+		ret = xc_write_reg(priv, XREG_AUDIO_MODE, AudioMode);
+
+	return ret;
+}
+
+int xc_shutdown(struct xc5000_priv *priv)
+{
+	return xc_write_reg(priv, XREG_POWER_DOWN, 0);
+}
+
+int xc_SetSignalSource(struct xc5000_priv *priv, unsigned short int rf_mode)
+{
+	dprintk(1, "%s(%d) Source = %s\n", __FUNCTION__, rf_mode,
+		rf_mode == XC_RF_MODE_AIR ? "ANTENNA" : "CABLE");
+
+	if( (rf_mode != XC_RF_MODE_AIR) && (rf_mode != XC_RF_MODE_CABLE) )
+	{
+		rf_mode = XC_RF_MODE_CABLE;
+		printk(KERN_ERR
+			"%s(), Invalid mode, defaulting to CABLE",
+			__FUNCTION__);
+	}
+	return xc_write_reg(priv, XREG_SIGNALSOURCE, rf_mode);
+}
+
+int xc_set_RF_frequency(struct xc5000_priv *priv, long frequency_in_hz)
+{
+	unsigned int frequency_code = (unsigned int)(frequency_in_hz / 15625);
+
+	if ((frequency_in_hz>1023000000) || (frequency_in_hz<1000000))
+		return XC_RESULT_OUT_OF_RANGE;
+
+	return xc_write_reg(priv, XREG_RF_FREQ ,frequency_code);
+}
+
+int xc_FineTune_RF_frequency(struct xc5000_priv *priv, long frequency_in_hz)
+{
+	unsigned int frequency_code = (unsigned int)(frequency_in_hz / 15625);
+	if ((frequency_in_hz>1023000000) || (frequency_in_hz<1000000))
+		return XC_RESULT_OUT_OF_RANGE;
+
+	return xc_write_reg(priv, XREG_FINERFFREQ ,frequency_code);
+}
+
+int xc_set_IF_frequency(struct xc5000_priv *priv, u32 freq_hz)
+{
+	u32 freq_code = (freq_hz * 1024)/1000000;
+	dprintk(1, "%s(%d)\n", __FUNCTION__, freq_hz);
+
+	printk(KERN_ERR "FIXME - Hardcoded IF, FIXME\n");
+	freq_code = 0x1585;
+
+	return xc_write_reg(priv, XREG_IF_OUT ,freq_code);
+}
+
+int xc_set_Xtal_frequency(struct xc5000_priv *priv, long xtalFreqInKHz)
+{
+	unsigned int xtalRatio = (32000 * 0x8000)/xtalFreqInKHz;
+	return xc_write_reg(priv, XREG_XTALFREQ ,xtalRatio);
+}
+
+int xc_get_ADC_Envelope(struct xc5000_priv *priv,
+	unsigned short int *adc_envelope)
+{
+	return xc_read_reg(priv, XREG_ADC_ENV, adc_envelope);
+}
+
+int xc_get_frequency_error(struct xc5000_priv *priv, u32 *frequency_error_hz)
+{
+	int result;
+	unsigned short int regData;
+	u32 tmp;
+
+	result = xc_read_reg(priv, XREG_FREQ_ERROR, &regData);
+	if (result)
+		return result;
+
+	tmp = (u32)regData;
+	(*frequency_error_hz) = (tmp * 15625) / 1000;
+	return result;
+}
+
+int xc_get_lock_status(struct xc5000_priv *priv,
+	unsigned short int *lock_status)
+{
+	return xc_read_reg(priv, XREG_LOCK, lock_status);
+}
+
+int xc_get_version(struct xc5000_priv *priv,
+	unsigned char* hw_majorversion,
+	unsigned char* hw_minorversion,
+	unsigned char* fw_majorversion,
+	unsigned char* fw_minorversion)
+{
+	unsigned short int data;
+	int result;
+
+	result = xc_read_reg(priv, XREG_VERSION, &data);
+	if (result)
+		return result;
+
+	(*hw_majorversion) = (data>>12) & 0x0F;
+	(*hw_minorversion) = (data>>8) & 0x0F;
+	(*fw_majorversion) = (data>>4) & 0x0F;
+	(*fw_minorversion) = (data) & 0x0F;
+
+	return 0;
+}
+
+int xc_get_product_id(struct xc5000_priv *priv, unsigned short int *product_id)
+{
+	return xc_read_reg(priv, XREG_PRODUCT_ID, product_id);
+}
+
+int xc_get_hsync_freq(struct xc5000_priv *priv, int *hsync_freq_hz)
+{
+	unsigned short int regData;
+	int result;
+
+	result = xc_read_reg(priv, XREG_HSYNC_FREQ, &regData);
+	if (result)
+		return result;
+
+	(*hsync_freq_hz) = ((regData & 0x0fff) * 763)/100;
+	return result;
+}
+
+int xc_get_frame_lines(struct xc5000_priv *priv,
+	unsigned short int *frame_lines)
+{
+	return xc_read_reg(priv, XREG_FRAME_LINES, frame_lines);
+}
+
+int xc_get_quality(struct xc5000_priv *priv, unsigned short int *quality)
+{
+	return xc_read_reg(priv, XREG_QUALITY, quality);
+}
+
+unsigned short int WaitForLock(struct xc5000_priv *priv)
+{
+	unsigned short int lockState = 0;
+	int watchDogCount = 40;
+	while ((lockState == 0) && (watchDogCount > 0))
+	{
+		xc_get_lock_status(priv, &lockState);
+		if (lockState != 1)
+		{
+			xc_wait(5);
+			watchDogCount--;
+		}
+	}
+	return lockState;
+}
+
+int xc_tune_channel(struct xc5000_priv *priv, u32 freq)
+{
+	int found = 0;
+
+	dprintk(1, "%s(%d)\n", __FUNCTION__, freq);
+
+	if (xc_set_RF_frequency(priv, freq) != XC_RESULT_SUCCESS)
+		return 0;
+
+	if (WaitForLock(priv)== 1)
+		found = 1;
+
+	return found;
+}
+
+static int xc5000_readreg(struct xc5000_priv *priv, u16 reg, u16 *val)
+{
+	u8 buf[2] = { reg >> 8, reg & 0xff };
+	u8 bval[2] = { 0, 0 };
+	struct i2c_msg msg[2] = {
+		{ .addr = priv->cfg->i2c_address,
+			.flags = 0, .buf = &buf[0], .len = 2 },
+		{ .addr = priv->cfg->i2c_address,
+			.flags = I2C_M_RD, .buf = &bval[0], .len = 2 },
+	};
+
+	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
+		printk(KERN_WARNING "xc5000 I2C read failed\n");
+		return -EREMOTEIO;
+	}
+
+	*val = (bval[0] << 8) | bval[1];
+	return 0;
+}
+
+static int xc5000_writeregs(struct xc5000_priv *priv, u8 *buf, u8 len)
+{
+	struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
+		.flags = 0, .buf = buf, .len = len };
+
+	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+		printk(KERN_ERR "xc5000 I2C write failed (len=%i)\n",
+			(int)len);
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+static int xc5000_readregs(struct xc5000_priv *priv, u8 *buf, u8 len)
+{
+	struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
+		.flags = I2C_M_RD, .buf = buf, .len = len };
+
+	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+		printk(KERN_ERR "xc5000 I2C read failed (len=%i)\n",(int)len);
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+static int xc5000_fwupload(struct dvb_frontend* fe)
+{
+	struct xc5000_priv *priv = fe->tuner_priv;
+	const struct firmware *fw;
+	int ret;
+
+	/* request the firmware, this will block until someone uploads it */
+	printk(KERN_INFO "xc5000: waiting for firmware upload (%s)...\n",
+		XC5000_DEFAULT_FIRMWARE);
+
+	if(!priv->cfg->request_firmware) {
+		printk(KERN_ERR "xc5000: no firmware callback, fatal\n");
+		return -EIO;
+	}
+
+	ret = priv->cfg->request_firmware(fe, &fw, XC5000_DEFAULT_FIRMWARE);
+	if (ret) {
+		printk(KERN_ERR "xc5000: Upload failed. (file not found?)\n");
+		ret = XC_RESULT_RESET_FAILURE;
+	} else {
+		printk(KERN_INFO "xc5000: firmware read %d bytes.\n", fw->size);
+		ret = XC_RESULT_SUCCESS;
+	}
+
+	if(fw->size != XC5000_DEFAULT_FIRMWARE_SIZE) {
+		printk(KERN_ERR "xc5000: firmware incorrect size\n");
+		ret = XC_RESULT_RESET_FAILURE;
+	} else {
+		printk(KERN_INFO "xc5000: firmware upload\n");
+		ret = xc_load_i2c_sequence(fe,  fw->data );
+	}
+
+	release_firmware(fw);
+	return ret;
+}
+
+void xc_debug_dump(struct xc5000_priv *priv)
+{
+	unsigned short	adc_envelope;
+	u32		frequency_error_hz;
+	unsigned short	lock_status;
+	unsigned char	hw_majorversion, hw_minorversion = 0;
+	unsigned char	fw_majorversion, fw_minorversion = 0;
+	int          	hsync_freq_hz;
+	unsigned short	frame_lines;
+	unsigned short	quality;
+
+	/* Wait for stats to stabilize.
+	 * Frame Lines needs two frame times after initial lock
+	 * before it is valid.
+	 */
+	xc_wait( 100 );
+
+	xc_get_ADC_Envelope(priv,  &adc_envelope );
+	dprintk(1, "*** ADC envelope (0-1023) = %u\n", adc_envelope);
+
+	xc_get_frequency_error(priv,  &frequency_error_hz );
+	dprintk(1, "*** Frequency error = %d Hz\n", frequency_error_hz);
+
+	xc_get_lock_status(priv,  &lock_status );
+	dprintk(1, "*** Lock status (0-Wait, 1-Locked, 2-No-signal) = %u\n",
+		lock_status);
+
+	xc_get_version(priv,  &hw_majorversion, &hw_minorversion,
+		&fw_majorversion, &fw_minorversion );
+	dprintk(1, "*** HW: V%02x.%02x, FW: V%02x.%02x\n",
+		hw_majorversion, hw_minorversion,
+		fw_majorversion, fw_minorversion);
+
+	xc_get_hsync_freq(priv,  &hsync_freq_hz );
+	dprintk(1, "*** Horizontal sync frequency = %u Hz\n", hsync_freq_hz);
+
+	xc_get_frame_lines(priv,  &frame_lines );
+	dprintk(1, "*** Frame lines = %u\n", frame_lines);
+
+	xc_get_quality(priv,  &quality );
+	dprintk(1, "*** Quality (0:<8dB, 7:>56dB) = %u\n", quality);
+}
+
+static int xc5000_set_params(struct dvb_frontend *fe,
+	struct dvb_frontend_parameters *params)
+{
+	struct xc5000_priv *priv = fe->tuner_priv;
+
+	dprintk(1, "%s() frequency=%d\n", __FUNCTION__, params->frequency);
+
+	priv->frequency = params->frequency - 1750000;
+	priv->bandwidth = 6;
+	priv->video_standard = DTV6;
+
+	switch(params->u.vsb.modulation) {
+	case VSB_8:
+	case VSB_16:
+		dprintk(1, "%s() VSB modulation\n", __FUNCTION__);
+		priv->rf_mode = XC_RF_MODE_AIR;
+		break;
+	case QAM_64:
+	case QAM_256:
+	case QAM_AUTO:
+		dprintk(1, "%s() QAM modulation\n", __FUNCTION__);
+		priv->rf_mode = XC_RF_MODE_CABLE;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	dprintk(1, "%s() frequency=%d (compensated)\n",
+		__FUNCTION__, priv->frequency);
+
+	/* FIXME: check result codes */
+	xc_SetSignalSource(priv, priv->rf_mode);
+
+	xc_SetTVStandard(priv,
+		XC5000_Standard[priv->video_standard].VideoMode,
+		XC5000_Standard[priv->video_standard].AudioMode);
+
+	xc_set_IF_frequency(priv, priv->cfg->if_frequency);
+	xc_tune_channel(priv, priv->frequency);
+	xc_debug_dump(priv);
+
+	return 0;
+}
+
+static int xc5000_get_frequency(struct dvb_frontend *fe, u32 *freq)
+{
+	struct xc5000_priv *priv = fe->tuner_priv;
+	dprintk(1, "%s()\n", __FUNCTION__);
+	*freq = priv->frequency;
+	return 0;
+}
+
+static int xc5000_get_bandwidth(struct dvb_frontend *fe, u32 *bw)
+{
+	struct xc5000_priv *priv = fe->tuner_priv;
+	dprintk(1, "%s()\n", __FUNCTION__);
+	*bw = priv->bandwidth;
+	return 0;
+}
+
+static int xc5000_get_status(struct dvb_frontend *fe, u32 *status)
+{
+	struct xc5000_priv *priv = fe->tuner_priv;
+	unsigned short int lock_status = 0;
+
+	xc_get_lock_status(priv, &lock_status);
+
+	dprintk(1, "%s() lock_status = 0x%08x\n", __FUNCTION__, lock_status);
+
+	*status = lock_status;
+
+	return 0;
+}
+
+int xc_load_fw_and_init_tuner(struct dvb_frontend *fe)
+{
+	struct xc5000_priv *priv = fe->tuner_priv;
+	int ret;
+
+	if(priv->fwloaded == 0) {
+		ret = xc5000_fwupload(fe);
+		if( ret != XC_RESULT_SUCCESS )
+			return -EREMOTEIO;
+
+		priv->fwloaded = 1;
+	}
+
+	/* Start the tuner self-calibration process */
+	ret |= xc_initialize(priv);
+
+	/* Wait for calibration to complete.
+	 * We could continue but XC5000 will clock stretch subsequent
+	 * I2C transactions until calibration is complete.  This way we
+	 * don't have to rely on clock stretching working.
+	 */
+	xc_wait( 100 );
+
+	/* Default to "CABLE" mode */
+	ret |= xc_write_reg(priv, XREG_SIGNALSOURCE, XC_RF_MODE_CABLE);
+
+	return ret;
+}
+
+static int xc5000_init(struct dvb_frontend *fe)
+{
+	struct xc5000_priv *priv = fe->tuner_priv;
+	dprintk(1, "%s()\n", __FUNCTION__);
+
+	xc_load_fw_and_init_tuner(fe);
+	xc_debug_dump(priv);
+
+	return 0;
+}
+
+static int xc5000_release(struct dvb_frontend *fe)
+{
+	dprintk(1, "%s()\n", __FUNCTION__);
+	kfree(fe->tuner_priv);
+	fe->tuner_priv = NULL;
+	return 0;
+}
+
+static const struct dvb_tuner_ops xc5000_tuner_ops = {
+	.info = {
+		.name           = "Xceive XC5000",
+		.frequency_min  =    1000000,
+		.frequency_max  = 1023000000,
+		.frequency_step =      50000,
+	},
+
+	.release       = xc5000_release,
+	.init          = xc5000_init,
+
+	.set_params    = xc5000_set_params,
+	.get_frequency = xc5000_get_frequency,
+	.get_bandwidth = xc5000_get_bandwidth,
+	.get_status    = xc5000_get_status
+};
+
+struct dvb_frontend * xc5000_attach(struct dvb_frontend *fe,
+	struct i2c_adapter *i2c,
+	struct xc5000_config *cfg)
+{
+	struct xc5000_priv *priv = NULL;
+	u16 id = 0;
+
+	dprintk(1, "%s()\n", __FUNCTION__);
+
+	priv = kzalloc(sizeof(struct xc5000_priv), GFP_KERNEL);
+	if (priv == NULL)
+		return NULL;
+
+	priv->cfg = cfg;
+	priv->bandwidth = 6000000; /* 6MHz */
+	priv->i2c = i2c;
+	priv->fwloaded = 0;
+
+	if (xc5000_readreg(priv, XREG_PRODUCT_ID, &id) != 0) {
+		kfree(priv);
+		return NULL;
+	}
+
+	if ( (id != 0x2000) && (id != 0x1388) ) {
+		printk(KERN_ERR
+			"xc5000: Device not found at addr 0x%02x (0x%x)\n",
+			cfg->i2c_address, id);
+		kfree(priv);
+		return NULL;
+	}
+
+	printk(KERN_INFO "xc5000: successfully identified at address 0x%02x\n",
+		cfg->i2c_address);
+
+	memcpy(&fe->ops.tuner_ops, &xc5000_tuner_ops,
+		sizeof(struct dvb_tuner_ops));
+
+	fe->tuner_priv = priv;
+
+	return fe;
+}
+EXPORT_SYMBOL(xc5000_attach);
+
+MODULE_AUTHOR("Steven Toth");
+MODULE_DESCRIPTION("Xceive XC5000 silicon tuner driver");
+MODULE_LICENSE("GPL");