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linux-next/drivers/media/common/tuners/tuner-simple.c
Andy Walls 3b4a9714f4 V4L/DVB (7922): tuner-simple: fix tuner_warn() induced kernel oops in simple_tuner_attach() 
The tuner_warn() macro relies on the local variable "priv" to be a valid
pointer.  There was a case in simple_tuner_attach() where this cannot be the
case yet, so tuner_warn() would dereference a NULL "priv" pointer.  Changed
the tuner_warn() to a printk() with the originally intended output format.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-06-05 06:35:44 -03:00

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/*
* i2c tv tuner chip device driver
* controls all those simple 4-control-bytes style tuners.
*
* This "tuner-simple" module was split apart from the original "tuner" module.
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/videodev.h>
#include <media/tuner.h>
#include <media/v4l2-common.h>
#include <media/tuner-types.h>
#include "tuner-i2c.h"
#include "tuner-simple.h"
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");
#define TUNER_SIMPLE_MAX 64
static unsigned int simple_devcount;
static int offset;
module_param(offset, int, 0664);
MODULE_PARM_DESC(offset, "Allows to specify an offset for tuner");
static unsigned int atv_input[TUNER_SIMPLE_MAX] = \
{ [0 ... (TUNER_SIMPLE_MAX-1)] = 0 };
static unsigned int dtv_input[TUNER_SIMPLE_MAX] = \
{ [0 ... (TUNER_SIMPLE_MAX-1)] = 0 };
module_param_array(atv_input, int, NULL, 0644);
module_param_array(dtv_input, int, NULL, 0644);
MODULE_PARM_DESC(atv_input, "specify atv rf input, 0 for autoselect");
MODULE_PARM_DESC(dtv_input, "specify dtv rf input, 0 for autoselect");
/* ---------------------------------------------------------------------- */
/* tv standard selection for Temic 4046 FM5
this value takes the low bits of control byte 2
from datasheet Rev.01, Feb.00
standard BG I L L2 D
picture IF 38.9 38.9 38.9 33.95 38.9
sound 1 33.4 32.9 32.4 40.45 32.4
sound 2 33.16
NICAM 33.05 32.348 33.05 33.05
*/
#define TEMIC_SET_PAL_I 0x05
#define TEMIC_SET_PAL_DK 0x09
#define TEMIC_SET_PAL_L 0x0a /* SECAM ? */
#define TEMIC_SET_PAL_L2 0x0b /* change IF ! */
#define TEMIC_SET_PAL_BG 0x0c
/* tv tuner system standard selection for Philips FQ1216ME
this value takes the low bits of control byte 2
from datasheet "1999 Nov 16" (supersedes "1999 Mar 23")
standard BG DK I L L`
picture carrier 38.90 38.90 38.90 38.90 33.95
colour 34.47 34.47 34.47 34.47 38.38
sound 1 33.40 32.40 32.90 32.40 40.45
sound 2 33.16 - - - -
NICAM 33.05 33.05 32.35 33.05 39.80
*/
#define PHILIPS_SET_PAL_I 0x01 /* Bit 2 always zero !*/
#define PHILIPS_SET_PAL_BGDK 0x09
#define PHILIPS_SET_PAL_L2 0x0a
#define PHILIPS_SET_PAL_L 0x0b
/* system switching for Philips FI1216MF MK2
from datasheet "1996 Jul 09",
standard BG L L'
picture carrier 38.90 38.90 33.95
colour 34.47 34.37 38.38
sound 1 33.40 32.40 40.45
sound 2 33.16 - -
NICAM 33.05 33.05 39.80
*/
#define PHILIPS_MF_SET_STD_BG 0x01 /* Bit 2 must be zero, Bit 3 is system output */
#define PHILIPS_MF_SET_STD_L 0x03 /* Used on Secam France */
#define PHILIPS_MF_SET_STD_LC 0x02 /* Used on SECAM L' */
/* Control byte */
#define TUNER_RATIO_MASK 0x06 /* Bit cb1:cb2 */
#define TUNER_RATIO_SELECT_50 0x00
#define TUNER_RATIO_SELECT_32 0x02
#define TUNER_RATIO_SELECT_166 0x04
#define TUNER_RATIO_SELECT_62 0x06
#define TUNER_CHARGE_PUMP 0x40 /* Bit cb6 */
/* Status byte */
#define TUNER_POR 0x80
#define TUNER_FL 0x40
#define TUNER_MODE 0x38
#define TUNER_AFC 0x07
#define TUNER_SIGNAL 0x07
#define TUNER_STEREO 0x10
#define TUNER_PLL_LOCKED 0x40
#define TUNER_STEREO_MK3 0x04
static DEFINE_MUTEX(tuner_simple_list_mutex);
static LIST_HEAD(hybrid_tuner_instance_list);
struct tuner_simple_priv {
unsigned int nr;
u16 last_div;
struct tuner_i2c_props i2c_props;
struct list_head hybrid_tuner_instance_list;
unsigned int type;
struct tunertype *tun;
u32 frequency;
u32 bandwidth;
};
/* ---------------------------------------------------------------------- */
static int tuner_read_status(struct dvb_frontend *fe)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
unsigned char byte;
if (1 != tuner_i2c_xfer_recv(&priv->i2c_props, &byte, 1))
return 0;
return byte;
}
static inline int tuner_signal(const int status)
{
return (status & TUNER_SIGNAL) << 13;
}
static inline int tuner_stereo(const int type, const int status)
{
switch (type) {
case TUNER_PHILIPS_FM1216ME_MK3:
case TUNER_PHILIPS_FM1236_MK3:
case TUNER_PHILIPS_FM1256_IH3:
case TUNER_LG_NTSC_TAPE:
return ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
default:
return status & TUNER_STEREO;
}
}
static inline int tuner_islocked(const int status)
{
return (status & TUNER_FL);
}
static inline int tuner_afcstatus(const int status)
{
return (status & TUNER_AFC) - 2;
}
static int simple_get_status(struct dvb_frontend *fe, u32 *status)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
int tuner_status;
if (priv->i2c_props.adap == NULL)
return -EINVAL;
tuner_status = tuner_read_status(fe);
*status = 0;
if (tuner_islocked(tuner_status))
*status = TUNER_STATUS_LOCKED;
if (tuner_stereo(priv->type, tuner_status))
*status |= TUNER_STATUS_STEREO;
tuner_dbg("AFC Status: %d\n", tuner_afcstatus(tuner_status));
return 0;
}
static int simple_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
int signal;
if (priv->i2c_props.adap == NULL)
return -EINVAL;
signal = tuner_signal(tuner_read_status(fe));
*strength = signal;
tuner_dbg("Signal strength: %d\n", signal);
return 0;
}
/* ---------------------------------------------------------------------- */
static inline char *tuner_param_name(enum param_type type)
{
char *name;
switch (type) {
case TUNER_PARAM_TYPE_RADIO:
name = "radio";
break;
case TUNER_PARAM_TYPE_PAL:
name = "pal";
break;
case TUNER_PARAM_TYPE_SECAM:
name = "secam";
break;
case TUNER_PARAM_TYPE_NTSC:
name = "ntsc";
break;
case TUNER_PARAM_TYPE_DIGITAL:
name = "digital";
break;
default:
name = "unknown";
break;
}
return name;
}
static struct tuner_params *simple_tuner_params(struct dvb_frontend *fe,
enum param_type desired_type)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
struct tunertype *tun = priv->tun;
int i;
for (i = 0; i < tun->count; i++)
if (desired_type == tun->params[i].type)
break;
/* use default tuner params if desired_type not available */
if (i == tun->count) {
tuner_dbg("desired params (%s) undefined for tuner %d\n",
tuner_param_name(desired_type), priv->type);
i = 0;
}
tuner_dbg("using tuner params #%d (%s)\n", i,
tuner_param_name(tun->params[i].type));
return &tun->params[i];
}
static int simple_config_lookup(struct dvb_frontend *fe,
struct tuner_params *t_params,
int *frequency, u8 *config, u8 *cb)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
int i;
for (i = 0; i < t_params->count; i++) {
if (*frequency > t_params->ranges[i].limit)
continue;
break;
}
if (i == t_params->count) {
tuner_dbg("frequency out of range (%d > %d)\n",
*frequency, t_params->ranges[i - 1].limit);
*frequency = t_params->ranges[--i].limit;
}
*config = t_params->ranges[i].config;
*cb = t_params->ranges[i].cb;
tuner_dbg("freq = %d.%02d (%d), range = %d, "
"config = 0x%02x, cb = 0x%02x\n",
*frequency / 16, *frequency % 16 * 100 / 16, *frequency,
i, *config, *cb);
return i;
}
/* ---------------------------------------------------------------------- */
static void simple_set_rf_input(struct dvb_frontend *fe,
u8 *config, u8 *cb, unsigned int rf)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
switch (priv->type) {
case TUNER_PHILIPS_TUV1236D:
switch (rf) {
case 1:
*cb |= 0x08;
break;
default:
*cb &= ~0x08;
break;
}
break;
case TUNER_PHILIPS_FCV1236D:
switch (rf) {
case 1:
*cb |= 0x01;
break;
default:
*cb &= ~0x01;
break;
}
break;
default:
break;
}
}
static int simple_std_setup(struct dvb_frontend *fe,
struct analog_parameters *params,
u8 *config, u8 *cb)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
u8 tuneraddr;
int rc;
/* tv norm specific stuff for multi-norm tuners */
switch (priv->type) {
case TUNER_PHILIPS_SECAM: /* FI1216MF */
/* 0x01 -> ??? no change ??? */
/* 0x02 -> PAL BDGHI / SECAM L */
/* 0x04 -> ??? PAL others / SECAM others ??? */
*cb &= ~0x03;
if (params->std & V4L2_STD_SECAM_L)
/* also valid for V4L2_STD_SECAM */
*cb |= PHILIPS_MF_SET_STD_L;
else if (params->std & V4L2_STD_SECAM_LC)
*cb |= PHILIPS_MF_SET_STD_LC;
else /* V4L2_STD_B|V4L2_STD_GH */
*cb |= PHILIPS_MF_SET_STD_BG;
break;
case TUNER_TEMIC_4046FM5:
*cb &= ~0x0f;
if (params->std & V4L2_STD_PAL_BG) {
*cb |= TEMIC_SET_PAL_BG;
} else if (params->std & V4L2_STD_PAL_I) {
*cb |= TEMIC_SET_PAL_I;
} else if (params->std & V4L2_STD_PAL_DK) {
*cb |= TEMIC_SET_PAL_DK;
} else if (params->std & V4L2_STD_SECAM_L) {
*cb |= TEMIC_SET_PAL_L;
}
break;
case TUNER_PHILIPS_FQ1216ME:
*cb &= ~0x0f;
if (params->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
*cb |= PHILIPS_SET_PAL_BGDK;
} else if (params->std & V4L2_STD_PAL_I) {
*cb |= PHILIPS_SET_PAL_I;
} else if (params->std & V4L2_STD_SECAM_L) {
*cb |= PHILIPS_SET_PAL_L;
}
break;
case TUNER_PHILIPS_FCV1236D:
/* 0x00 -> ATSC antenna input 1 */
/* 0x01 -> ATSC antenna input 2 */
/* 0x02 -> NTSC antenna input 1 */
/* 0x03 -> NTSC antenna input 2 */
*cb &= ~0x03;
if (!(params->std & V4L2_STD_ATSC))
*cb |= 2;
break;
case TUNER_MICROTUNE_4042FI5:
/* Set the charge pump for fast tuning */
*config |= TUNER_CHARGE_PUMP;
break;
case TUNER_PHILIPS_TUV1236D:
{
/* 0x40 -> ATSC antenna input 1 */
/* 0x48 -> ATSC antenna input 2 */
/* 0x00 -> NTSC antenna input 1 */
/* 0x08 -> NTSC antenna input 2 */
u8 buffer[4] = { 0x14, 0x00, 0x17, 0x00};
*cb &= ~0x40;
if (params->std & V4L2_STD_ATSC) {
*cb |= 0x40;
buffer[1] = 0x04;
}
/* set to the correct mode (analog or digital) */
tuneraddr = priv->i2c_props.addr;
priv->i2c_props.addr = 0x0a;
rc = tuner_i2c_xfer_send(&priv->i2c_props, &buffer[0], 2);
if (2 != rc)
tuner_warn("i2c i/o error: rc == %d "
"(should be 2)\n", rc);
rc = tuner_i2c_xfer_send(&priv->i2c_props, &buffer[2], 2);
if (2 != rc)
tuner_warn("i2c i/o error: rc == %d "
"(should be 2)\n", rc);
priv->i2c_props.addr = tuneraddr;
break;
}
}
if (atv_input[priv->nr])
simple_set_rf_input(fe, config, cb, atv_input[priv->nr]);
return 0;
}
static int simple_post_tune(struct dvb_frontend *fe, u8 *buffer,
u16 div, u8 config, u8 cb)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
int rc;
switch (priv->type) {
case TUNER_LG_TDVS_H06XF:
/* Set the Auxiliary Byte. */
buffer[0] = buffer[2];
buffer[0] &= ~0x20;
buffer[0] |= 0x18;
buffer[1] = 0x20;
tuner_dbg("tv 0x%02x 0x%02x\n", buffer[0], buffer[1]);
rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 2);
if (2 != rc)
tuner_warn("i2c i/o error: rc == %d "
"(should be 2)\n", rc);
break;
case TUNER_MICROTUNE_4042FI5:
{
/* FIXME - this may also work for other tuners */
unsigned long timeout = jiffies + msecs_to_jiffies(1);
u8 status_byte = 0;
/* Wait until the PLL locks */
for (;;) {
if (time_after(jiffies, timeout))
return 0;
rc = tuner_i2c_xfer_recv(&priv->i2c_props,
&status_byte, 1);
if (1 != rc) {
tuner_warn("i2c i/o read error: rc == %d "
"(should be 1)\n", rc);
break;
}
if (status_byte & TUNER_PLL_LOCKED)
break;
udelay(10);
}
/* Set the charge pump for optimized phase noise figure */
config &= ~TUNER_CHARGE_PUMP;
buffer[0] = (div>>8) & 0x7f;
buffer[1] = div & 0xff;
buffer[2] = config;
buffer[3] = cb;
tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
buffer[0], buffer[1], buffer[2], buffer[3]);
rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 4);
if (4 != rc)
tuner_warn("i2c i/o error: rc == %d "
"(should be 4)\n", rc);
break;
}
}
return 0;
}
static int simple_radio_bandswitch(struct dvb_frontend *fe, u8 *buffer)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
switch (priv->type) {
case TUNER_TENA_9533_DI:
case TUNER_YMEC_TVF_5533MF:
tuner_dbg("This tuner doesn't have FM. "
"Most cards have a TEA5767 for FM\n");
return 0;
case TUNER_PHILIPS_FM1216ME_MK3:
case TUNER_PHILIPS_FM1236_MK3:
case TUNER_PHILIPS_FMD1216ME_MK3:
case TUNER_LG_NTSC_TAPE:
case TUNER_PHILIPS_FM1256_IH3:
buffer[3] = 0x19;
break;
case TUNER_TNF_5335MF:
buffer[3] = 0x11;
break;
case TUNER_LG_PAL_FM:
buffer[3] = 0xa5;
break;
case TUNER_THOMSON_DTT761X:
buffer[3] = 0x39;
break;
case TUNER_MICROTUNE_4049FM5:
default:
buffer[3] = 0xa4;
break;
}
return 0;
}
/* ---------------------------------------------------------------------- */
static int simple_set_tv_freq(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
u8 config, cb;
u16 div;
struct tunertype *tun;
u8 buffer[4];
int rc, IFPCoff, i;
enum param_type desired_type;
struct tuner_params *t_params;
tun = priv->tun;
/* IFPCoff = Video Intermediate Frequency - Vif:
940 =16*58.75 NTSC/J (Japan)
732 =16*45.75 M/N STD
704 =16*44 ATSC (at DVB code)
632 =16*39.50 I U.K.
622.4=16*38.90 B/G D/K I, L STD
592 =16*37.00 D China
590 =16.36.875 B Australia
543.2=16*33.95 L' STD
171.2=16*10.70 FM Radio (at set_radio_freq)
*/
if (params->std == V4L2_STD_NTSC_M_JP) {
IFPCoff = 940;
desired_type = TUNER_PARAM_TYPE_NTSC;
} else if ((params->std & V4L2_STD_MN) &&
!(params->std & ~V4L2_STD_MN)) {
IFPCoff = 732;
desired_type = TUNER_PARAM_TYPE_NTSC;
} else if (params->std == V4L2_STD_SECAM_LC) {
IFPCoff = 543;
desired_type = TUNER_PARAM_TYPE_SECAM;
} else {
IFPCoff = 623;
desired_type = TUNER_PARAM_TYPE_PAL;
}
t_params = simple_tuner_params(fe, desired_type);
i = simple_config_lookup(fe, t_params, &params->frequency,
&config, &cb);
div = params->frequency + IFPCoff + offset;
tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, "
"Offset=%d.%02d MHz, div=%0d\n",
params->frequency / 16, params->frequency % 16 * 100 / 16,
IFPCoff / 16, IFPCoff % 16 * 100 / 16,
offset / 16, offset % 16 * 100 / 16, div);
/* tv norm specific stuff for multi-norm tuners */
simple_std_setup(fe, params, &config, &cb);
if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
buffer[0] = config;
buffer[1] = cb;
buffer[2] = (div>>8) & 0x7f;
buffer[3] = div & 0xff;
} else {
buffer[0] = (div>>8) & 0x7f;
buffer[1] = div & 0xff;
buffer[2] = config;
buffer[3] = cb;
}
priv->last_div = div;
if (t_params->has_tda9887) {
struct v4l2_priv_tun_config tda9887_cfg;
int config = 0;
int is_secam_l = (params->std & (V4L2_STD_SECAM_L |
V4L2_STD_SECAM_LC)) &&
!(params->std & ~(V4L2_STD_SECAM_L |
V4L2_STD_SECAM_LC));
tda9887_cfg.tuner = TUNER_TDA9887;
tda9887_cfg.priv = &config;
if (params->std == V4L2_STD_SECAM_LC) {
if (t_params->port1_active ^ t_params->port1_invert_for_secam_lc)
config |= TDA9887_PORT1_ACTIVE;
if (t_params->port2_active ^ t_params->port2_invert_for_secam_lc)
config |= TDA9887_PORT2_ACTIVE;
} else {
if (t_params->port1_active)
config |= TDA9887_PORT1_ACTIVE;
if (t_params->port2_active)
config |= TDA9887_PORT2_ACTIVE;
}
if (t_params->intercarrier_mode)
config |= TDA9887_INTERCARRIER;
if (is_secam_l) {
if (i == 0 && t_params->default_top_secam_low)
config |= TDA9887_TOP(t_params->default_top_secam_low);
else if (i == 1 && t_params->default_top_secam_mid)
config |= TDA9887_TOP(t_params->default_top_secam_mid);
else if (t_params->default_top_secam_high)
config |= TDA9887_TOP(t_params->default_top_secam_high);
} else {
if (i == 0 && t_params->default_top_low)
config |= TDA9887_TOP(t_params->default_top_low);
else if (i == 1 && t_params->default_top_mid)
config |= TDA9887_TOP(t_params->default_top_mid);
else if (t_params->default_top_high)
config |= TDA9887_TOP(t_params->default_top_high);
}
if (t_params->default_pll_gating_18)
config |= TDA9887_GATING_18;
i2c_clients_command(priv->i2c_props.adap, TUNER_SET_CONFIG,
&tda9887_cfg);
}
tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
buffer[0], buffer[1], buffer[2], buffer[3]);
rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 4);
if (4 != rc)
tuner_warn("i2c i/o error: rc == %d (should be 4)\n", rc);
simple_post_tune(fe, &buffer[0], div, config, cb);
return 0;
}
static int simple_set_radio_freq(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct tunertype *tun;
struct tuner_simple_priv *priv = fe->tuner_priv;
u8 buffer[4];
u16 div;
int rc, j;
struct tuner_params *t_params;
unsigned int freq = params->frequency;
tun = priv->tun;
for (j = tun->count-1; j > 0; j--)
if (tun->params[j].type == TUNER_PARAM_TYPE_RADIO)
break;
/* default t_params (j=0) will be used if desired type wasn't found */
t_params = &tun->params[j];
/* Select Radio 1st IF used */
switch (t_params->radio_if) {
case 0: /* 10.7 MHz */
freq += (unsigned int)(10.7*16000);
break;
case 1: /* 33.3 MHz */
freq += (unsigned int)(33.3*16000);
break;
case 2: /* 41.3 MHz */
freq += (unsigned int)(41.3*16000);
break;
default:
tuner_warn("Unsupported radio_if value %d\n",
t_params->radio_if);
return 0;
}
/* Bandswitch byte */
simple_radio_bandswitch(fe, &buffer[0]);
buffer[2] = (t_params->ranges[0].config & ~TUNER_RATIO_MASK) |
TUNER_RATIO_SELECT_50; /* 50 kHz step */
/* Convert from 1/16 kHz V4L steps to 1/20 MHz (=50 kHz) PLL steps
freq * (1 Mhz / 16000 V4L steps) * (20 PLL steps / 1 MHz) =
freq * (1/800) */
div = (freq + 400) / 800;
if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
buffer[0] = buffer[2];
buffer[1] = buffer[3];
buffer[2] = (div>>8) & 0x7f;
buffer[3] = div & 0xff;
} else {
buffer[0] = (div>>8) & 0x7f;
buffer[1] = div & 0xff;
}
tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
buffer[0], buffer[1], buffer[2], buffer[3]);
priv->last_div = div;
if (t_params->has_tda9887) {
int config = 0;
struct v4l2_priv_tun_config tda9887_cfg;
tda9887_cfg.tuner = TUNER_TDA9887;
tda9887_cfg.priv = &config;
if (t_params->port1_active &&
!t_params->port1_fm_high_sensitivity)
config |= TDA9887_PORT1_ACTIVE;
if (t_params->port2_active &&
!t_params->port2_fm_high_sensitivity)
config |= TDA9887_PORT2_ACTIVE;
if (t_params->intercarrier_mode)
config |= TDA9887_INTERCARRIER;
/* if (t_params->port1_set_for_fm_mono)
config &= ~TDA9887_PORT1_ACTIVE;*/
if (t_params->fm_gain_normal)
config |= TDA9887_GAIN_NORMAL;
if (t_params->radio_if == 2)
config |= TDA9887_RIF_41_3;
i2c_clients_command(priv->i2c_props.adap, TUNER_SET_CONFIG,
&tda9887_cfg);
}
rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 4);
if (4 != rc)
tuner_warn("i2c i/o error: rc == %d (should be 4)\n", rc);
return 0;
}
static int simple_set_params(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
int ret = -EINVAL;
if (priv->i2c_props.adap == NULL)
return -EINVAL;
switch (params->mode) {
case V4L2_TUNER_RADIO:
ret = simple_set_radio_freq(fe, params);
priv->frequency = params->frequency * 125 / 2;
break;
case V4L2_TUNER_ANALOG_TV:
case V4L2_TUNER_DIGITAL_TV:
ret = simple_set_tv_freq(fe, params);
priv->frequency = params->frequency * 62500;
break;
}
priv->bandwidth = 0;
return ret;
}
static void simple_set_dvb(struct dvb_frontend *fe, u8 *buf,
const struct dvb_frontend_parameters *params)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
switch (priv->type) {
case TUNER_PHILIPS_FMD1216ME_MK3:
if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ &&
params->frequency >= 158870000)
buf[3] |= 0x08;
break;
case TUNER_PHILIPS_TD1316:
/* determine band */
buf[3] |= (params->frequency < 161000000) ? 1 :
(params->frequency < 444000000) ? 2 : 4;
/* setup PLL filter */
if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
buf[3] |= 1 << 3;
break;
case TUNER_PHILIPS_TUV1236D:
case TUNER_PHILIPS_FCV1236D:
{
unsigned int new_rf;
if (dtv_input[priv->nr])
new_rf = dtv_input[priv->nr];
else
switch (params->u.vsb.modulation) {
case QAM_64:
case QAM_256:
new_rf = 1;
break;
case VSB_8:
default:
new_rf = 0;
break;
}
simple_set_rf_input(fe, &buf[2], &buf[3], new_rf);
break;
}
default:
break;
}
}
static u32 simple_dvb_configure(struct dvb_frontend *fe, u8 *buf,
const struct dvb_frontend_parameters *params)
{
/* This function returns the tuned frequency on success, 0 on error */
struct tuner_simple_priv *priv = fe->tuner_priv;
struct tunertype *tun = priv->tun;
static struct tuner_params *t_params;
u8 config, cb;
u32 div;
int ret, frequency = params->frequency / 62500;
t_params = simple_tuner_params(fe, TUNER_PARAM_TYPE_DIGITAL);
ret = simple_config_lookup(fe, t_params, &frequency, &config, &cb);
if (ret < 0)
return 0; /* failure */
div = ((frequency + t_params->iffreq) * 62500 + offset +
tun->stepsize/2) / tun->stepsize;
buf[0] = div >> 8;
buf[1] = div & 0xff;
buf[2] = config;
buf[3] = cb;
simple_set_dvb(fe, buf, params);
tuner_dbg("%s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n",
tun->name, div, buf[0], buf[1], buf[2], buf[3]);
/* calculate the frequency we set it to */
return (div * tun->stepsize) - t_params->iffreq;
}
static int simple_dvb_calc_regs(struct dvb_frontend *fe,
struct dvb_frontend_parameters *params,
u8 *buf, int buf_len)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
u32 frequency;
if (buf_len < 5)
return -EINVAL;
frequency = simple_dvb_configure(fe, buf+1, params);
if (frequency == 0)
return -EINVAL;
buf[0] = priv->i2c_props.addr;
priv->frequency = frequency;
priv->bandwidth = (fe->ops.info.type == FE_OFDM) ?
params->u.ofdm.bandwidth : 0;
return 5;
}
static int simple_dvb_set_params(struct dvb_frontend *fe,
struct dvb_frontend_parameters *params)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
u32 prev_freq, prev_bw;
int ret;
u8 buf[5];
if (priv->i2c_props.adap == NULL)
return -EINVAL;
prev_freq = priv->frequency;
prev_bw = priv->bandwidth;
ret = simple_dvb_calc_regs(fe, params, buf, 5);
if (ret != 5)
goto fail;
/* put analog demod in standby when tuning digital */
if (fe->ops.analog_ops.standby)
fe->ops.analog_ops.standby(fe);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
/* buf[0] contains the i2c address, but *
* we already have it in i2c_props.addr */
ret = tuner_i2c_xfer_send(&priv->i2c_props, buf+1, 4);
if (ret != 4)
goto fail;
return 0;
fail:
/* calc_regs sets frequency and bandwidth. if we failed, unset them */
priv->frequency = prev_freq;
priv->bandwidth = prev_bw;
return ret;
}
static int simple_init(struct dvb_frontend *fe)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
if (priv->i2c_props.adap == NULL)
return -EINVAL;
if (priv->tun->initdata) {
int ret;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
ret = tuner_i2c_xfer_send(&priv->i2c_props,
priv->tun->initdata + 1,
priv->tun->initdata[0]);
if (ret != priv->tun->initdata[0])
return ret;
}
return 0;
}
static int simple_sleep(struct dvb_frontend *fe)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
if (priv->i2c_props.adap == NULL)
return -EINVAL;
if (priv->tun->sleepdata) {
int ret;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
ret = tuner_i2c_xfer_send(&priv->i2c_props,
priv->tun->sleepdata + 1,
priv->tun->sleepdata[0]);
if (ret != priv->tun->sleepdata[0])
return ret;
}
return 0;
}
static int simple_release(struct dvb_frontend *fe)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
mutex_lock(&tuner_simple_list_mutex);
if (priv)
hybrid_tuner_release_state(priv);
mutex_unlock(&tuner_simple_list_mutex);
fe->tuner_priv = NULL;
return 0;
}
static int simple_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
*frequency = priv->frequency;
return 0;
}
static int simple_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
*bandwidth = priv->bandwidth;
return 0;
}
static struct dvb_tuner_ops simple_tuner_ops = {
.init = simple_init,
.sleep = simple_sleep,
.set_analog_params = simple_set_params,
.set_params = simple_dvb_set_params,
.calc_regs = simple_dvb_calc_regs,
.release = simple_release,
.get_frequency = simple_get_frequency,
.get_bandwidth = simple_get_bandwidth,
.get_status = simple_get_status,
.get_rf_strength = simple_get_rf_strength,
};
struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c_adap,
u8 i2c_addr,
unsigned int type)
{
struct tuner_simple_priv *priv = NULL;
int instance;
if (type >= tuner_count) {
printk(KERN_WARNING "%s: invalid tuner type: %d (max: %d)\n",
__func__, type, tuner_count-1);
return NULL;
}
/* If i2c_adap is set, check that the tuner is at the correct address.
* Otherwise, if i2c_adap is NULL, the tuner will be programmed directly
* by the digital demod via calc_regs.
*/
if (i2c_adap != NULL) {
u8 b[1];
struct i2c_msg msg = {
.addr = i2c_addr, .flags = I2C_M_RD,
.buf = b, .len = 1,
};
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if (1 != i2c_transfer(i2c_adap, &msg, 1))
printk(KERN_WARNING "tuner-simple %d-%04x: "
"unable to probe %s, proceeding anyway.",
i2c_adapter_id(i2c_adap), i2c_addr,
tuners[type].name);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
mutex_lock(&tuner_simple_list_mutex);
instance = hybrid_tuner_request_state(struct tuner_simple_priv, priv,
hybrid_tuner_instance_list,
i2c_adap, i2c_addr,
"tuner-simple");
switch (instance) {
case 0:
mutex_unlock(&tuner_simple_list_mutex);
return NULL;
break;
case 1:
fe->tuner_priv = priv;
priv->type = type;
priv->tun = &tuners[type];
priv->nr = simple_devcount++;
break;
default:
fe->tuner_priv = priv;
break;
}
mutex_unlock(&tuner_simple_list_mutex);
memcpy(&fe->ops.tuner_ops, &simple_tuner_ops,
sizeof(struct dvb_tuner_ops));
tuner_info("type set to %d (%s)\n", type, priv->tun->name);
if ((debug) || ((atv_input[priv->nr] > 0) ||
(dtv_input[priv->nr] > 0))) {
if (0 == atv_input[priv->nr])
tuner_info("tuner %d atv rf input will be "
"autoselected\n", priv->nr);
else
tuner_info("tuner %d atv rf input will be "
"set to input %d (insmod option)\n",
priv->nr, atv_input[priv->nr]);
if (0 == dtv_input[priv->nr])
tuner_info("tuner %d dtv rf input will be "
"autoselected\n", priv->nr);
else
tuner_info("tuner %d dtv rf input will be "
"set to input %d (insmod option)\n",
priv->nr, dtv_input[priv->nr]);
}
strlcpy(fe->ops.tuner_ops.info.name, priv->tun->name,
sizeof(fe->ops.tuner_ops.info.name));
return fe;
}
EXPORT_SYMBOL_GPL(simple_tuner_attach);
MODULE_DESCRIPTION("Simple 4-control-bytes style tuner driver");
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
MODULE_LICENSE("GPL");
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* ---------------------------------------------------------------------------
* Local variables:
* c-basic-offset: 8
* End:
*/
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