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V4L/DVB (6425): Add experimental DVB frontend tuner interface to xc20…
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…28/3028

Signed-off-by: Michel Ludwig <michel.ludwig@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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Michel Ludwig authored and Mauro Carvalho Chehab committed Jan 25, 2008
1 parent c2622e5 commit 701672e
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Showing 2 changed files with 191 additions and 39 deletions.
225 changes: 186 additions & 39 deletions drivers/media/video/tuner-xc2028.c
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Original file line number Diff line number Diff line change
@@ -1,6 +1,8 @@
/* 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
*/

Expand All @@ -9,19 +11,38 @@
#include <linux/firmware.h>
#include <linux/videodev.h>
#include <linux/delay.h>
#include <media/tuner.h>
#include "tuner-driver.h"
#include "tuner-xc2028.h"

#include <linux/dvb/frontend.h>
#include "dvb_frontend.h"

/* digital TV standards */
#define V4L2_STD_DTV_6MHZ ((v4l2_std_id)0x04000000)
#define V4L2_STD_DTV_7MHZ ((v4l2_std_id)0x08000000)
#define V4L2_STD_DTV_8MHZ ((v4l2_std_id)0x10000000)

/* Firmwares used on tm5600/tm6000 + xc2028/xc3028 */
static const char *firmware_6M = "tm6000_xc3028_DTV_6M.fw";
static const char *firmware_8M = "tm6000_xc3028_78M.fw";
// static const char *firmware_78M = "tm6000_xc3028_78M.fw";
static const char *firmware_7M = "tm6000_xc3028_7M.fw";
static const char *firmware_8M = "tm6000_xc3028_8M.fw";
static const char *firmware_B = "tm6000_xc3028_B_PAL.fw";
static const char *firmware_DK = "tm6000_xc3028_DK_PAL_MTS.fw";
static const char *firmware_MN = "tm6000_xc3028_MN_BTSC.fw";
static const char *firmware_INIT0 = "tm6000_xc3028_INIT0.fw";
static const char *firmware_8MHZ_INIT0 = "tm6000_xc3028_8MHZ_INIT0.fw";

struct xc2028_data {
v4l2_std_id firm_type; /* video stds supported by current firmware */
int bandwidth; /* Firmware bandwidth: 6M, 7M or 8M */
int need_load_generic; /* The generic firmware were loaded? */
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? */
enum tuner_mode mode;
struct i2c_client *i2c_client;
};

#define i2c_send(rc,c,buf,size) \
Expand Down Expand Up @@ -80,7 +101,7 @@ static int load_firmware (struct i2c_client *c, const char *name)
int len=0, rc=0;
static const char firmware_ver[] = "tm6000/xcv v1";

tuner_info("Loading firmware %s\n", name);
tuner_info("xc2028: Loading firmware %s\n", name);
rc = request_firmware(&fw, name, &c->dev);
if (rc < 0) {
tuner_info("Error %d while requesting firmware\n", rc);
Expand Down Expand Up @@ -154,24 +175,39 @@ static int load_firmware (struct i2c_client *c, const char *name)
return rc;
}

static int check_firmware(struct i2c_client *c)
static int check_firmware(struct i2c_client *c, enum tuner_mode new_mode,
fe_bandwidth_t bandwidth)
{
int rc, version;
struct tuner *t = i2c_get_clientdata(c);
struct xc2028_data *xc2028 = t->priv;
const char *name;
int change_digital_bandwidth;

if (!t->tuner_callback) {
printk(KERN_ERR "xc2028: need tuner_callback to load firmware\n");
return -EINVAL;
}

printk(KERN_INFO "xc2028: I am in mode %u and I should switch to mode %i\n",
xc2028->mode, new_mode);

/* first of all, determine whether we have switched the mode */
if(new_mode != xc2028->mode) {
xc2028->mode = new_mode;
xc2028->need_load_generic = 1;
}

change_digital_bandwidth = (xc2028->mode == T_DIGITAL_TV
&& bandwidth != xc2028->bandwidth) ? 1 : 0;
tuner_info("xc2028: old bandwidth %u, new bandwidth %u\n", xc2028->bandwidth,
bandwidth);

if (xc2028->need_load_generic) {
if (xc2028->bandwidth==6)
name = firmware_6M;
name = firmware_INIT0;
else
name = firmware_8M;

name = firmware_8MHZ_INIT0;
/* Reset is needed before loading firmware */
rc = t->tuner_callback(c->adapter->algo_data,
XC2028_TUNER_RESET, 0);
Expand All @@ -184,37 +220,54 @@ static int check_firmware(struct i2c_client *c)

xc2028->need_load_generic=0;
xc2028->firm_type=0;
if(xc2028->mode == T_DIGITAL_TV) {
change_digital_bandwidth=1;
}
}

tuner_info("xc2028: I should change bandwidth %u\n",
change_digital_bandwidth);

if (change_digital_bandwidth) {
switch(bandwidth) {
case BANDWIDTH_8_MHZ:
t->std = V4L2_STD_DTV_8MHZ;
break;

case BANDWIDTH_7_MHZ:
t->std = V4L2_STD_DTV_7MHZ;
break;

case BANDWIDTH_6_MHZ:
t->std = V4L2_STD_DTV_6MHZ;
break;

default:
tuner_info("error: bandwidth not supported.\n");
};
xc2028->bandwidth = bandwidth;
}

if (xc2028->firm_type & t->std)
return 0;

send_seq (c, {0x12, 0x39});
send_seq (c, {0x0c, 0x80, 0xf0, 0xf7, 0x3e, 0x75, 0xc1, 0x8a, 0xe4});
send_seq (c, {0x0c, 0x02, 0x00});
send_seq (c, {0x05, 0x0f, 0xee, 0xaa, 0x5f, 0xea, 0x90});
send_seq (c, {0x06, 0x00, 0x0a, 0x4d, 0x8c, 0xf2, 0xd8, 0xcf, 0x30});
send_seq (c, {0x06, 0x79, 0x9f});
send_seq (c, {0x0b, 0x0d, 0xa4, 0x6c});
send_seq (c, {0x0a, 0x01, 0x67, 0x24, 0x40, 0x08, 0xc3, 0x20, 0x10});
send_seq (c, {0x0a, 0x64, 0x3c, 0xfa, 0xf7, 0xe1, 0x0c, 0x2c});
send_seq (c, {0x09, 0x0b});
send_seq (c, {0x10, 0x13});
send_seq (c, {0x16, 0x12});
send_seq (c, {0x1f, 0x02});
send_seq (c, {0x21, 0x02});
send_seq (c, {0x01, 0x02});
send_seq (c, {0x2b, 0x10});
send_seq (c, {0x02, 0x02});
send_seq (c, {0x02, 0x03});
send_seq (c, {0x00, 0x8c});

if (t->std & V4L2_STD_MN)
name=firmware_MN;
else if (t->std & V4L2_STD_DTV_6MHZ)
name=firmware_6M;
else if (t->std & V4L2_STD_DTV_7MHZ)
name=firmware_7M;
else if (t->std & V4L2_STD_DTV_8MHZ)
name=firmware_8M;
else if (t->std & V4L2_STD_PAL_B)
name=firmware_B;
else
name=firmware_DK;

rc = load_firmware(c,name);
tuner_info("xc2028: loading firmware named %s.\n", name);

rc = load_firmware(c, name);
if (rc<0)
return rc;

Expand All @@ -231,8 +284,7 @@ static int xc2028_signal(struct i2c_client *c)
{
int lock, signal;

if (check_firmware(c)<0)
return 0;
printk(KERN_INFO "xc2028: %s called\n", __FUNCTION__);

lock = xc2028_get_reg(c, 0x2);
if (lock<=0)
Expand All @@ -250,16 +302,37 @@ static int xc2028_signal(struct i2c_client *c)

#define DIV 15625

static void set_tv_freq(struct i2c_client *c, unsigned int freq)
static void generic_set_tv_freq(struct i2c_client *c, u32 freq /* in Hz */,
enum tuner_mode new_mode, fe_bandwidth_t bandwidth)
{
int rc;
unsigned char buf[5];
struct tuner *t = i2c_get_clientdata(c);
unsigned long div = (freq*62500l+DIV/2)/DIV;
u32 div, offset = 0;

if (check_firmware(c)<0)
printk("xc3028: should set frequency %d kHz)\n", freq / 1000);

if (check_firmware(c, new_mode, bandwidth)<0)
return;

if(new_mode == T_DIGITAL_TV) {
switch(bandwidth) {
case BANDWIDTH_8_MHZ:
offset = 2750000;
break;

case BANDWIDTH_7_MHZ:
offset = 2750000;
break;

case BANDWIDTH_6_MHZ:
default:
printk(KERN_ERR "xc2028: bandwidth not implemented!\n");
}
}

div = (freq - offset + DIV/2)/DIV;

/* Reset GPIO 1 */
if (t->tuner_callback) {
rc = t->tuner_callback( c->adapter->algo_data,
Expand All @@ -281,6 +354,7 @@ static void set_tv_freq(struct i2c_client *c, unsigned int freq)
msleep(10);
// send_seq(c, {0x00, 0x00, 0x10, 0xd0, 0x00});
// msleep(100);

buf[0]= 0xff & (div>>24);
buf[1]= 0xff & (div>>16);
buf[2]= 0xff & (div>>8);
Expand All @@ -299,6 +373,14 @@ static void set_tv_freq(struct i2c_client *c, unsigned int freq)
}


static void set_tv_freq(struct i2c_client *c, unsigned int freq)
{
printk(KERN_INFO "xc2028: %s called\n", __FUNCTION__);

generic_set_tv_freq(c, freq * 62500l, T_ANALOG_TV,
BANDWIDTH_8_MHZ /* unimportant */);
}

static void xc2028_release(struct i2c_client *c)
{
struct tuner *t = i2c_get_clientdata(c);
Expand All @@ -324,6 +406,8 @@ int xc2028_tuner_init(struct i2c_client *c)
int prd_id = xc2028_get_reg(c, 0x8);
struct xc2028_data *xc2028;

tuner_info("Xcv2028/3028 init called!\n");

if (init) {
printk (KERN_ERR "Module already initialized!\n");
return 0;
Expand All @@ -335,12 +419,9 @@ int xc2028_tuner_init(struct i2c_client *c)
return -ENOMEM;
t->priv = xc2028;

#ifdef HACK
xc2028->firm_type=1;
xc2028->bandwidth=6;
#endif
xc2028->bandwidth=6;
xc2028->bandwidth=BANDWIDTH_6_MHZ;
xc2028->need_load_generic=1;
xc2028->mode = T_UNINITIALIZED;

/* FIXME: Check where t->priv will be freed */

Expand All @@ -360,3 +441,69 @@ int xc2028_tuner_init(struct i2c_client *c)

return 0;
}

static int xc3028_set_params(struct dvb_frontend *fe,
struct dvb_frontend_parameters *p)
{
struct i2c_client *c = fe->tuner_priv;

printk(KERN_INFO "xc2028: %s called\n", __FUNCTION__);

generic_set_tv_freq(c, p->frequency, T_DIGITAL_TV,
p->u.ofdm.bandwidth);

return 0;
}

static int xc3028_dvb_release(struct dvb_frontend *fe)
{
printk(KERN_INFO "xc2028: %s called\n", __FUNCTION__);

fe->tuner_priv = NULL;

return 0;
}

static int xc3028_dvb_init(struct dvb_frontend *fe)
{
printk(KERN_INFO "xc2028: %s called\n", __FUNCTION__);

return 0;
}

static const struct dvb_tuner_ops xc3028_dvb_tuner_ops = {
.info = {
.name = "Xceive XC3028",
.frequency_min = 42000000,
.frequency_max = 864000000,
.frequency_step = 50000,
},

.release = xc3028_dvb_release,
.init = xc3028_dvb_init,

// int (*sleep)(struct dvb_frontend *fe);

/** This is for simple PLLs - set all parameters in one go. */
.set_params = xc3028_set_params,

/** This is support for demods like the mt352 - fills out the supplied buffer with what to write. */
// int (*calc_regs)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p, u8 *buf, int buf_len);

// int (*get_frequency)(struct dvb_frontend *fe, u32 *frequency);
// int (*get_bandwidth)(struct dvb_frontend *fe, u32 *bandwidth);

// int (*get_status)(struct dvb_frontend *fe, u32 *status);
};

int xc2028_attach(struct i2c_client *c, struct dvb_frontend *fe)
{
fe->tuner_priv = c;

memcpy(&fe->ops.tuner_ops, &xc3028_dvb_tuner_ops, sizeof(fe->ops.tuner_ops));

return 0;
}

EXPORT_SYMBOL(xc2028_attach);

5 changes: 5 additions & 0 deletions drivers/media/video/tuner-xc2028.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -7,3 +7,8 @@
/* xc2028 commands for callback */
#define XC2028_TUNER_RESET 0
#define XC2028_RESET_CLK 1

struct dvb_frontend;
struct i2c_client;

int xc2028_attach(struct i2c_client *c, struct dvb_frontend *fe);

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