blob: 7c86971a8d64217c25144ff1e83b33aa63af36f8 [file] [log] [blame]
/* tuner-xc2028
*
* Copyright (c) 2007 Mauro Carvalho Chehab (mchehab@infradead.org)
*
* Copyright (c) 2007 Michel Ludwig (michel.ludwig@gmail.com)
* - frontend interface
*
* This code is placed under the terms of the GNU General Public License v2
*/
#include <linux/i2c.h>
#include <asm/div64.h>
#include <linux/firmware.h>
#include <linux/videodev2.h>
#include <linux/delay.h>
#include <media/tuner.h>
#include <linux/mutex.h>
#include "tuner-i2c.h"
#include "tuner-xc2028.h"
#include "tuner-xc2028-types.h"
#include <linux/dvb/frontend.h>
#include "dvb_frontend.h"
#define PREFIX "xc2028"
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");
static char audio_std[8];
module_param_string(audio_std, audio_std, sizeof(audio_std), 0);
MODULE_PARM_DESC(audio_std,
"Audio standard. XC3028 audio decoder explicitly "
"needs to know what audio\n"
"standard is needed for some video standards with audio A2 or NICAM.\n"
"The valid values are:\n"
"A2\n"
"A2/A\n"
"A2/B\n"
"NICAM\n"
"NICAM/A\n"
"NICAM/B\n");
static LIST_HEAD(xc2028_list);
static DEFINE_MUTEX(xc2028_list_mutex);
/* struct for storing firmware table */
struct firmware_description {
unsigned int type;
v4l2_std_id id;
unsigned char *ptr;
unsigned int size;
};
struct xc2028_data {
struct list_head xc2028_list;
struct tuner_i2c_props i2c_props;
int (*tuner_callback) (void *dev,
int command, int arg);
void *video_dev;
int count;
__u32 frequency;
struct firmware_description *firm;
int firm_size;
__u16 firm_version;
struct xc2028_ctrl ctrl;
v4l2_std_id firm_type; /* video stds supported
by current firmware */
fe_bandwidth_t bandwidth; /* Firmware bandwidth:
6M, 7M or 8M */
int need_load_generic; /* The generic firmware
were loaded? */
int max_len; /* Max firmware chunk */
enum tuner_mode mode;
struct i2c_client *i2c_client;
struct mutex lock;
};
#define i2c_send(priv, buf, size) ({ \
int _rc; \
_rc = tuner_i2c_xfer_send(&priv->i2c_props, buf, size); \
if (size != _rc) \
tuner_info("i2c output error: rc = %d (should be %d)\n",\
_rc, (int)size); \
_rc; \
})
#define i2c_rcv(priv, buf, size) ({ \
int _rc; \
_rc = tuner_i2c_xfer_recv(&priv->i2c_props, buf, size); \
if (size != _rc) \
tuner_err("i2c input error: rc = %d (should be %d)\n", \
_rc, (int)size); \
_rc; \
})
#define i2c_send_recv(priv, obuf, osize, ibuf, isize) ({ \
int _rc; \
_rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, obuf, osize, \
ibuf, isize); \
if (isize != _rc) \
tuner_err("i2c input error: rc = %d (should be %d)\n", \
_rc, (int)isize); \
_rc; \
})
#define send_seq(priv, data...) ({ \
static u8 _val[] = data; \
int _rc; \
if (sizeof(_val) != \
(_rc = tuner_i2c_xfer_send(&priv->i2c_props, \
_val, sizeof(_val)))) { \
tuner_err("Error on line %d: %d\n", __LINE__, _rc); \
} else \
msleep(10); \
_rc; \
})
static unsigned int xc2028_get_reg(struct xc2028_data *priv, u16 reg, u16 *val)
{
unsigned char buf[2];
unsigned char ibuf[2];
tuner_dbg("%s %04x called\n", __FUNCTION__, reg);
buf[0] = reg >> 8;
buf[1] = (unsigned char) reg;
if (i2c_send_recv(priv, buf, 2, ibuf, 2) != 2)
return -EIO;
*val = (ibuf[1]) | (ibuf[0] << 8);
return 0;
}
void dump_firm_type(unsigned int type)
{
if (type & BASE)
printk("BASE ");
if (type & INIT1)
printk("INIT1 ");
if (type & F8MHZ)
printk("F8MHZ ");
if (type & MTS)
printk("MTS ");
if (type & D2620)
printk("D2620 ");
if (type & D2633)
printk("D2633 ");
if (type & DTV6)
printk("DTV6 ");
if (type & QAM)
printk("QAM ");
if (type & DTV7)
printk("DTV7 ");
if (type & DTV78)
printk("DTV78 ");
if (type & DTV8)
printk("DTV8 ");
if (type & FM)
printk("FM ");
if (type & INPUT1)
printk("INPUT1 ");
if (type & LCD)
printk("LCD ");
if (type & NOGD)
printk("NOGD ");
if (type & MONO)
printk("MONO ");
if (type & ATSC)
printk("ATSC ");
if (type & IF)
printk("IF ");
if (type & LG60)
printk("LG60 ");
if (type & ATI638)
printk("ATI638 ");
if (type & OREN538)
printk("OREN538 ");
if (type & OREN36)
printk("OREN36 ");
if (type & TOYOTA388)
printk("TOYOTA388 ");
if (type & TOYOTA794)
printk("TOYOTA794 ");
if (type & DIBCOM52)
printk("DIBCOM52 ");
if (type & ZARLINK456)
printk("ZARLINK456 ");
if (type & CHINA)
printk("CHINA ");
if (type & F6MHZ)
printk("F6MHZ ");
if (type & INPUT2)
printk("INPUT2 ");
if (type & SCODE)
printk("SCODE ");
}
static v4l2_std_id parse_audio_std_option(void)
{
if (strcasecmp(audio_std, "A2") == 0)
return V4L2_STD_A2;
if (strcasecmp(audio_std, "A2/A") == 0)
return V4L2_STD_A2_A;
if (strcasecmp(audio_std, "A2/B") == 0)
return V4L2_STD_A2_B;
if (strcasecmp(audio_std, "NICAM") == 0)
return V4L2_STD_NICAM;
if (strcasecmp(audio_std, "NICAM/A") == 0)
return V4L2_STD_NICAM_A;
if (strcasecmp(audio_std, "NICAM/B") == 0)
return V4L2_STD_NICAM_B;
return 0;
}
static void free_firmware(struct xc2028_data *priv)
{
int i;
if (!priv->firm)
return;
for (i = 0; i < priv->firm_size; i++)
kfree(priv->firm[i].ptr);
kfree(priv->firm);
priv->firm = NULL;
priv->firm_size = 0;
priv->need_load_generic = 1;
}
static int load_all_firmwares(struct dvb_frontend *fe)
{
struct xc2028_data *priv = fe->tuner_priv;
const struct firmware *fw = NULL;
unsigned char *p, *endp;
int rc = 0;
int n, n_array;
char name[33];
tuner_dbg("%s called\n", __FUNCTION__);
tuner_dbg("Reading firmware %s\n", priv->ctrl.fname);
rc = request_firmware(&fw, priv->ctrl.fname,
&priv->i2c_props.adap->dev);
if (rc < 0) {
if (rc == -ENOENT)
tuner_err("Error: firmware %s not found.\n",
priv->ctrl.fname);
else
tuner_err("Error %d while requesting firmware %s \n",
rc, priv->ctrl.fname);
return rc;
}
p = fw->data;
endp = p + fw->size;
if (fw->size < sizeof(name) - 1 + 2 + 2) {
tuner_err("Error: firmware file %s has invalid size!\n",
priv->ctrl.fname);
goto corrupt;
}
memcpy(name, p, sizeof(name) - 1);
name[sizeof(name) - 1] = 0;
p += sizeof(name) - 1;
priv->firm_version = le16_to_cpu(*(__u16 *) p);
p += 2;
n_array = le16_to_cpu(*(__u16 *) p);
p += 2;
tuner_info("Loading %d firmware images from %s, type: %s, ver %d.%d\n",
n_array, priv->ctrl.fname, name,
priv->firm_version >> 8, priv->firm_version & 0xff);
priv->firm = kzalloc(sizeof(*priv->firm) * n_array, GFP_KERNEL);
if (priv->firm == NULL) {
tuner_err("Not enough memory to load firmware file.\n");
rc = -ENOMEM;
goto err;
}
priv->firm_size = n_array;
n = -1;
while (p < endp) {
__u32 type, size;
v4l2_std_id id;
n++;
if (n >= n_array) {
tuner_err("More firmware images in file than "
"were expected!\n");
goto corrupt;
}
/* Checks if there's enough bytes to read */
if (p + sizeof(type) + sizeof(id) + sizeof(size) > endp) {
tuner_err("Firmware header is incomplete!\n");
goto corrupt;
}
type = le32_to_cpu(*(__u32 *) p);
p += sizeof(type);
id = le64_to_cpu(*(v4l2_std_id *) p);
p += sizeof(id);
size = le32_to_cpu(*(__u32 *) p);
p += sizeof(size);
if ((!size) || (size + p > endp)) {
tuner_err("Firmware type ");
dump_firm_type(type);
printk("(%x), id %llx is corrupted "
"(size=%d, expected %d)\n",
type, (unsigned long long)id,
(unsigned)(endp - p), size);
goto corrupt;
}
priv->firm[n].ptr = kzalloc(size, GFP_KERNEL);
if (priv->firm[n].ptr == NULL) {
tuner_err("Not enough memory to load firmware file.\n");
rc = -ENOMEM;
goto err;
}
tuner_dbg("Reading firmware type ");
if (debug) {
dump_firm_type(type);
printk("(%x), id %llx, size=%d.\n",
type, (unsigned long long)id, size);
}
memcpy(priv->firm[n].ptr, p, size);
priv->firm[n].type = type;
priv->firm[n].id = id;
priv->firm[n].size = size;
p += size;
}
if (n + 1 != priv->firm_size) {
tuner_err("Firmware file is incomplete!\n");
goto corrupt;
}
goto done;
corrupt:
rc = -EINVAL;
tuner_err("Error: firmware file is corrupted!\n");
err:
tuner_info("Releasing partially loaded firmware file.\n");
free_firmware(priv);
done:
release_firmware(fw);
if (rc == 0)
tuner_dbg("Firmware files loaded.\n");
return rc;
}
static int seek_firmware(struct dvb_frontend *fe, unsigned int type,
v4l2_std_id *id)
{
struct xc2028_data *priv = fe->tuner_priv;
int i;
tuner_dbg("%s called\n", __FUNCTION__);
if (!priv->firm) {
tuner_err("Error! firmware not loaded\n");
return -EINVAL;
}
if (((type & ~SCODE) == 0) && (*id == 0))
*id = V4L2_STD_PAL;
/* Seek for exact match */
for (i = 0; i < priv->firm_size; i++) {
if ((type == priv->firm[i].type) && (*id == priv->firm[i].id))
goto found;
}
/* Seek for generic video standard match */
for (i = 0; i < priv->firm_size; i++) {
if ((type == priv->firm[i].type) && (*id & priv->firm[i].id))
goto found;
}
/*FIXME: Would make sense to seek for type "hint" match ? */
i = -EINVAL;
goto ret;
found:
*id = priv->firm[i].id;
ret:
tuner_dbg("%s firmware for type=", (i < 0)? "Can't find": "Found");
if (debug) {
dump_firm_type(type);
printk("(%x), id %016llx.\n", type, (unsigned long long)*id);
}
return i;
}
static int load_firmware(struct dvb_frontend *fe, unsigned int type,
v4l2_std_id *id)
{
struct xc2028_data *priv = fe->tuner_priv;
int pos, rc;
unsigned char *p, *endp, buf[priv->max_len];
tuner_dbg("%s called\n", __FUNCTION__);
pos = seek_firmware(fe, type, id);
if (pos < 0)
return pos;
tuner_info("Loading firmware for type=");
dump_firm_type(type);
printk("(%x), id %016llx.\n", type, (unsigned long long)*id);
p = priv->firm[pos].ptr;
endp = p + priv->firm[pos].size;
while (p < endp) {
__u16 size;
/* Checks if there's enough bytes to read */
if (p + sizeof(size) > endp) {
tuner_err("Firmware chunk size is wrong\n");
return -EINVAL;
}
size = le16_to_cpu(*(__u16 *) p);
p += sizeof(size);
if (size == 0xffff)
return 0;
if (!size) {
/* Special callback command received */
rc = priv->tuner_callback(priv->video_dev,
XC2028_TUNER_RESET, 0);
if (rc < 0) {
tuner_err("Error at RESET code %d\n",
(*p) & 0x7f);
return -EINVAL;
}
continue;
}
if (size >= 0xff00) {
switch (size) {
case 0xff00:
rc = priv->tuner_callback(priv->video_dev,
XC2028_RESET_CLK, 0);
if (rc < 0) {
tuner_err("Error at RESET code %d\n",
(*p) & 0x7f);
return -EINVAL;
}
break;
default:
tuner_info("Invalid RESET code %d\n",
size & 0x7f);
return -EINVAL;
}
continue;
}
/* Checks for a sleep command */
if (size & 0x8000) {
msleep(size & 0x7fff);
continue;
}
if ((size + p > endp)) {
tuner_err("missing bytes: need %d, have %d\n",
size, (int)(endp - p));
return -EINVAL;
}
buf[0] = *p;
p++;
size--;
/* Sends message chunks */
while (size > 0) {
int len = (size < priv->max_len - 1) ?
size : priv->max_len - 1;
memcpy(buf + 1, p, len);
rc = i2c_send(priv, buf, len + 1);
if (rc < 0) {
tuner_err("%d returned from send\n", rc);
return -EINVAL;
}
p += len;
size -= len;
}
}
return 0;
}
static int load_scode(struct dvb_frontend *fe, unsigned int type,
v4l2_std_id *id, int scode)
{
struct xc2028_data *priv = fe->tuner_priv;
int pos, rc;
unsigned char *p;
tuner_dbg("%s called\n", __FUNCTION__);
pos = seek_firmware(fe, type, id);
if (pos < 0)
return pos;
p = priv->firm[pos].ptr;
if ((priv->firm[pos].size != 12 * 16) || (scode >= 16))
return -EINVAL;
if (priv->firm_version < 0x0202)
rc = send_seq(priv, {0x20, 0x00, 0x00, 0x00});
else
rc = send_seq(priv, {0xa0, 0x00, 0x00, 0x00});
if (rc < 0)
return -EIO;
rc = i2c_send(priv, p + 12 * scode, 12);
if (rc < 0)
return -EIO;
rc = send_seq(priv, {0x00, 0x8c});
if (rc < 0)
return -EIO;
return 0;
}
static int check_firmware(struct dvb_frontend *fe, enum tuner_mode new_mode,
v4l2_std_id std, fe_bandwidth_t bandwidth)
{
struct xc2028_data *priv = fe->tuner_priv;
int rc;
u16 version, hwmodel;
v4l2_std_id std0 = 0;
unsigned int type0 = 0, type = 0;
int change_digital_bandwidth;
tuner_dbg("%s called\n", __FUNCTION__);
if (!priv->firm) {
if (!priv->ctrl.fname) {
tuner_info("xc2028/3028 firmware name not set!\n");
return -EINVAL;
}
rc = load_all_firmwares(fe);
if (rc < 0)
return rc;
}
tuner_dbg("I am in mode %u and I should switch to mode %i\n",
priv->mode, new_mode);
/* first of all, determine whether we have switched the mode */
if (new_mode != priv->mode) {
priv->mode = new_mode;
priv->need_load_generic = 1;
}
change_digital_bandwidth = (priv->mode == T_DIGITAL_TV
&& bandwidth != priv->bandwidth) ? 1 : 0;
tuner_dbg("old bandwidth %u, new bandwidth %u\n", priv->bandwidth,
bandwidth);
if (priv->need_load_generic) {
/* Reset is needed before loading firmware */
rc = priv->tuner_callback(priv->video_dev,
XC2028_TUNER_RESET, 0);
if (rc < 0)
return rc;
type0 = BASE;
if (priv->ctrl.type == XC2028_FIRM_MTS)
type0 |= MTS;
if (priv->bandwidth == 8)
type0 |= F8MHZ;
/* FIXME: How to load FM and FM|INPUT1 firmwares? */
rc = load_firmware(fe, type0, &std0);
if (rc < 0) {
tuner_err("Error %d while loading generic firmware\n",
rc);
return rc;
}
priv->need_load_generic = 0;
priv->firm_type = 0;
if (priv->mode == T_DIGITAL_TV)
change_digital_bandwidth = 1;
}
tuner_dbg("I should change bandwidth %u\n", change_digital_bandwidth);
if (change_digital_bandwidth) {
/*FIXME: Should allow selecting between D2620 and D2633 */
type |= D2620;
/* FIXME: When should select a DTV78 firmware?
*/
switch (bandwidth) {
case BANDWIDTH_8_MHZ:
type |= DTV8;
break;
case BANDWIDTH_7_MHZ:
type |= DTV7;
break;
case BANDWIDTH_6_MHZ:
/* FIXME: Should allow select also ATSC */
type |= DTV6 | QAM;
break;
default:
tuner_err("error: bandwidth not supported.\n");
};
priv->bandwidth = bandwidth;
}
if (!change_digital_bandwidth && priv->mode == T_DIGITAL_TV)
return 0;
/* Load INIT1, if needed */
tuner_dbg("Load init1 firmware, if exists\n");
type0 = BASE | INIT1;
if (priv->ctrl.type == XC2028_FIRM_MTS)
type0 |= MTS;
/* FIXME: Should handle errors - if INIT1 found */
rc = load_firmware(fe, type0, &std0);
/* FIXME: Should add support for FM radio
*/
if (priv->ctrl.type == XC2028_FIRM_MTS)
type |= MTS;
if (priv->firm_type & std) {
tuner_dbg("Std-specific firmware already loaded.\n");
return 0;
}
/* Add audio hack to std mask */
std |= parse_audio_std_option();
rc = load_firmware(fe, type, &std);
if (rc < 0)
return rc;
/* Load SCODE firmware, if exists */
tuner_dbg("Trying to load scode 0\n");
type |= SCODE;
rc = load_scode(fe, type, &std, 0);
xc2028_get_reg(priv, 0x0004, &version);
xc2028_get_reg(priv, 0x0008, &hwmodel);
tuner_info("Device is Xceive %d version %d.%d, "
"firmware version %d.%d\n",
hwmodel, (version & 0xf000) >> 12, (version & 0xf00) >> 8,
(version & 0xf0) >> 4, version & 0xf);
priv->firm_type = std;
return 0;
}
static int xc2028_signal(struct dvb_frontend *fe, u16 *strength)
{
struct xc2028_data *priv = fe->tuner_priv;
u16 frq_lock, signal = 0;
int rc;
tuner_dbg("%s called\n", __FUNCTION__);
mutex_lock(&priv->lock);
/* Sync Lock Indicator */
rc = xc2028_get_reg(priv, 0x0002, &frq_lock);
if (rc < 0 || frq_lock == 0)
goto ret;
/* Frequency is locked. Return signal quality */
/* Get SNR of the video signal */
rc = xc2028_get_reg(priv, 0x0040, &signal);
if (rc < 0)
signal = -frq_lock;
ret:
mutex_unlock(&priv->lock);
*strength = signal;
return rc;
}
#define DIV 15625
static int generic_set_tv_freq(struct dvb_frontend *fe, u32 freq /* in Hz */ ,
enum tuner_mode new_mode,
v4l2_std_id std, fe_bandwidth_t bandwidth)
{
struct xc2028_data *priv = fe->tuner_priv;
int rc = -EINVAL;
unsigned char buf[5];
u32 div, offset = 0;
tuner_dbg("%s called\n", __FUNCTION__);
mutex_lock(&priv->lock);
/* HACK: It seems that specific firmware need to be reloaded
when freq is changed */
priv->firm_type = 0;
/* Reset GPIO 1 */
rc = priv->tuner_callback(priv->video_dev, XC2028_TUNER_RESET, 0);
if (rc < 0)
goto ret;
msleep(10);
tuner_dbg("should set frequency %d kHz)\n", freq / 1000);
if (check_firmware(fe, new_mode, std, bandwidth) < 0)
goto ret;
if (new_mode == T_DIGITAL_TV)
offset = 2750000;
div = (freq - offset + DIV / 2) / DIV;
/* CMD= Set frequency */
if (priv->firm_version < 0x0202)
rc = send_seq(priv, {0x00, 0x02, 0x00, 0x00});
else
rc = send_seq(priv, {0x80, 0x02, 0x00, 0x00});
if (rc < 0)
goto ret;
rc = priv->tuner_callback(priv->video_dev, XC2028_RESET_CLK, 1);
if (rc < 0)
goto ret;
msleep(10);
buf[0] = 0xff & (div >> 24);
buf[1] = 0xff & (div >> 16);
buf[2] = 0xff & (div >> 8);
buf[3] = 0xff & (div);
buf[4] = 0;
rc = i2c_send(priv, buf, sizeof(buf));
if (rc < 0)
goto ret;
msleep(100);
priv->frequency = freq;
tuner_dbg("divider= %02x %02x %02x %02x (freq=%d.%02d)\n",
buf[1], buf[2], buf[3], buf[4],
freq / 1000000, (freq % 1000000) / 10000);
rc = 0;
ret:
mutex_unlock(&priv->lock);
return rc;
}
static int xc2028_set_tv_freq(struct dvb_frontend *fe,
struct analog_parameters *p)
{
struct xc2028_data *priv = fe->tuner_priv;
tuner_dbg("%s called\n", __FUNCTION__);
return generic_set_tv_freq(fe, 62500l * p->frequency, T_ANALOG_TV,
p->std, BANDWIDTH_8_MHZ /* NOT USED */);
}
static int xc2028_set_params(struct dvb_frontend *fe,
struct dvb_frontend_parameters *p)
{
struct xc2028_data *priv = fe->tuner_priv;
tuner_dbg("%s called\n", __FUNCTION__);
/* FIXME: Only OFDM implemented */
if (fe->ops.info.type != FE_OFDM) {
tuner_err("DTV type not implemented.\n");
return -EINVAL;
}
return generic_set_tv_freq(fe, p->frequency, T_DIGITAL_TV,
0 /* NOT USED */,
p->u.ofdm.bandwidth);
}
static int xc2028_dvb_release(struct dvb_frontend *fe)
{
struct xc2028_data *priv = fe->tuner_priv;
tuner_dbg("%s called\n", __FUNCTION__);
mutex_lock(&xc2028_list_mutex);
priv->count--;
if (!priv->count) {
list_del(&priv->xc2028_list);
kfree(priv->ctrl.fname);
free_firmware(priv);
kfree(priv);
fe->tuner_priv = NULL;
}
mutex_unlock(&xc2028_list_mutex);
return 0;
}
static int xc2028_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct xc2028_data *priv = fe->tuner_priv;
tuner_dbg("%s called\n", __FUNCTION__);
*frequency = priv->frequency;
return 0;
}
static int xc2028_set_config(struct dvb_frontend *fe, void *priv_cfg)
{
struct xc2028_data *priv = fe->tuner_priv;
struct xc2028_ctrl *p = priv_cfg;
tuner_dbg("%s called\n", __FUNCTION__);
mutex_lock(&priv->lock);
priv->ctrl.type = p->type;
if (p->fname) {
kfree(priv->ctrl.fname);
priv->ctrl.fname = kmalloc(strlen(p->fname) + 1, GFP_KERNEL);
if (priv->ctrl.fname == NULL) {
mutex_unlock(&priv->lock);
return -ENOMEM;
}
free_firmware(priv);
strcpy(priv->ctrl.fname, p->fname);
}
if (p->max_len > 0)
priv->max_len = p->max_len;
mutex_unlock(&priv->lock);
return 0;
}
static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = {
.info = {
.name = "Xceive XC3028",
.frequency_min = 42000000,
.frequency_max = 864000000,
.frequency_step = 50000,
},
.set_config = xc2028_set_config,
.set_analog_params = xc2028_set_tv_freq,
.release = xc2028_dvb_release,
.get_frequency = xc2028_get_frequency,
.get_rf_strength = xc2028_signal,
.set_params = xc2028_set_params,
};
void *xc2028_attach(struct dvb_frontend *fe, struct xc2028_config *cfg)
{
struct xc2028_data *priv;
void *video_dev;
if (debug)
printk(KERN_DEBUG PREFIX ": Xcv2028/3028 init called!\n");
if (NULL == cfg->video_dev)
return NULL;
if (!fe) {
printk(KERN_ERR PREFIX ": No frontend!\n");
return NULL;
}
video_dev = cfg->video_dev;
mutex_lock(&xc2028_list_mutex);
list_for_each_entry(priv, &xc2028_list, xc2028_list) {
if (priv->video_dev == cfg->video_dev) {
video_dev = NULL;
break;
}
}
if (video_dev) {
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (priv == NULL) {
mutex_unlock(&xc2028_list_mutex);
return NULL;
}
priv->bandwidth = BANDWIDTH_6_MHZ;
priv->need_load_generic = 1;
priv->mode = T_UNINITIALIZED;
priv->i2c_props.addr = cfg->i2c_addr;
priv->i2c_props.adap = cfg->i2c_adap;
priv->video_dev = video_dev;
priv->tuner_callback = cfg->callback;
priv->max_len = 13;
mutex_init(&priv->lock);
list_add_tail(&priv->xc2028_list, &xc2028_list);
}
fe->tuner_priv = priv;
priv->count++;
memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
sizeof(xc2028_dvb_tuner_ops));
tuner_info("type set to %s\n", "XCeive xc2028/xc3028 tuner");
mutex_unlock(&xc2028_list_mutex);
return fe;
}
EXPORT_SYMBOL(xc2028_attach);
MODULE_DESCRIPTION("Xceive xc2028/xc3028 tuner driver");
MODULE_AUTHOR("Michel Ludwig <michel.ludwig@gmail.com>");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
MODULE_LICENSE("GPL");