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V4L/DVB (6593): Fix scode table loading

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Xceive 2028/3028 has a concept of scode/dcode.
Scode is a table of 16 values (each with 12 bytes i2c sequence).
Dcode is the entry of Scode table that should be used, given a certain
frequency.

The idea is that, depending on what frequency is selected, and according with a
country-based (or standard-based?) table, the Xceive should be "hacked" to
fine-tune that specific frequency.

By default, Scode=0 is used, for undefined frequencies. Also, Scode=0 seems to
be the most used value.

This patch adds the capability of selecting a scode. However, extra work will
be needed to allow auto-selecting the proper scode, for a given set of
frequencies.

I'm not sure what would be the proper way for implementing the dcode selection.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mauro Carvalho Chehab 2007-11-15 08:43:53 -03:00
parent 43efe70253
commit f380e1d2c9
1 changed files with 77 additions and 21 deletions
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98
drivers/media/video/tuner-xc2028.c
View File

@ -116,6 +116,8 @@ 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)
@ -201,7 +203,7 @@ static int load_all_firmwares(struct dvb_frontend *fe)
tuner_info("%s called\n", __FUNCTION__);
tuner_info("Loading firmware %s\n", priv->ctrl.fname);
tuner_info("Reading firmware %s\n", priv->ctrl.fname);
rc = request_firmware(&fw, priv->ctrl.fname, priv->dev);
if (rc < 0) {
if (rc == -ENOENT)
@ -325,12 +327,11 @@ done:
return rc;
}
static int load_firmware(struct dvb_frontend *fe, unsigned int type,
v4l2_std_id * id)
static int seek_firmware(struct dvb_frontend *fe, unsigned int type,
v4l2_std_id *id)
{
struct xc2028_data *priv = fe->tuner_priv;
int i, rc;
unsigned char *p, *endp, buf[priv->max_len];
int i;
tuner_info("%s called\n", __FUNCTION__);
@ -339,7 +340,7 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
return -EINVAL;
}
if ((type == 0) && (*id == 0))
if (((type & ~SCODE) == 0) && (*id == 0))
*id = V4L2_STD_PAL;
/* Seek for exact match */
@ -356,21 +357,40 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
/*FIXME: Would make sense to seek for type "hint" match ? */
tuner_info("Can't find firmware for type=%x, id=%lx\n", type,
(long int)*id);
return -EINVAL;
i = -EINVAL;
goto ret;
found:
*id = priv->firm[i].id;
tuner_info("Found firmware for type=%x, id=%lx\n", type, (long int)*id);
p = priv->firm[i].ptr;
ret:
tuner_info("%s firmware for type=", (i < 0)? "Can't find": "Found");
dump_firm_type(type);
printk("(%x), id %08lx.\n", type, (unsigned 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_info("%s called\n", __FUNCTION__);
pos = seek_firmware(fe, type, id);
if (pos < 0)
return pos;
p = priv->firm[pos].ptr;
if (!p) {
printk(KERN_ERR PREFIX "Firmware pointer were freed!");
return -EINVAL;
}
endp = p + priv->firm[i].size;
endp = p + priv->firm[pos].size;
while (p < endp) {
__u16 size;
@ -435,6 +455,42 @@ found:
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_info("%s called\n", __FUNCTION__);
pos = seek_firmware(fe, type, id);
if (pos < 0)
return pos;
p = priv->firm[pos].ptr;
if (!p) {
printk(KERN_ERR PREFIX "Firmware pointer were freed!");
return -EINVAL;
}
if ((priv->firm[pos].size != 12 * 16) || (scode >= 16))
return -EINVAL;
if (priv->version < 0x0202) {
send_seq(priv, {0x20, 0x00, 0x00, 0x00});
} else {
send_seq(priv, {0xa0, 0x00, 0x00, 0x00});
}
i2c_send(rc, priv, p + 12 * scode, 12);
send_seq(priv, {0x00, 0x8c});
return 0;
}
static int check_firmware(struct dvb_frontend *fe, enum tuner_mode new_mode,
v4l2_std_id std, fe_bandwidth_t bandwidth)
{
@ -527,8 +583,8 @@ static int check_firmware(struct dvb_frontend *fe, enum tuner_mode new_mode,
}
/* Load INIT1, if needed */
tuner_info("Trying to load init1 firmware\n");
type0 = BASE | INIT1 | priv->ctrl.type;
tuner_info("Load init1 firmware, if exists\n");
type0 = BASE | INIT1;
if (priv->ctrl.type == XC2028_FIRM_MTS)
type0 |= MTS;
@ -541,9 +597,9 @@ static int check_firmware(struct dvb_frontend *fe, enum tuner_mode new_mode,
if (priv->ctrl.type == XC2028_FIRM_MTS)
type |= MTS;
tuner_info("firmware standard to load: %08lx\n", (unsigned long)std);
tuner_info("Firmware standard to load: %08lx\n", (unsigned long)std);
if (priv->firm_type & std) {
tuner_info("no need to load a std-specific firmware.\n");
tuner_info("Std-specific firmware already loaded.\n");
return 0;
}
@ -551,11 +607,11 @@ static int check_firmware(struct dvb_frontend *fe, enum tuner_mode new_mode,
if (rc < 0)
return rc;
/* Load SCODE firmware, if needed */
tuner_info("Trying to load scode firmware\n");
type0 = SCODE | priv->ctrl.type;
if (priv->ctrl.type == XC2028_FIRM_MTS)
type0 |= MTS;
/* Load SCODE firmware, if exists */
tuner_info("Trying to load scode 0\n");
type |= SCODE;
rc = load_scode(fe, type, &std, 0);
version = xc2028_get_reg(priv, 0x0004);
hwmodel = xc2028_get_reg(priv, 0x0008);