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linux/drivers/media/dvb-frontends/s921.c
Mauro Carvalho Chehab 7e3e68bcfd [media] dvb_frontend: pass the props cache to get_frontend() as arg 
Instead of using the DTV properties cache directly, pass the get
frontend data as an argument. For now, everything should remain
the same, but the next patch will prevent get_frontend to
affect the global cache.

This is needed because several drivers don't care enough to only
change the properties if locked. Due to that, calling
G_PROPERTY before locking on those drivers will make them to
never lock. Ok, those drivers are crap and should never be
merged like that, but the core should not rely that the drivers
would be doing the right thing.

Reviewed-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2016-02-04 16:27:30 -02:00

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/*
* Sharp VA3A5JZ921 One Seg Broadcast Module driver
* This device is labeled as just S. 921 at the top of the frontend can
*
* Copyright (C) 2009-2010 Mauro Carvalho Chehab
* Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com>
*
* Developed for Leadership SBTVD 1seg device sold in Brazil
*
* Frontend module based on cx24123 driver, getting some info from
* the old s921 driver.
*
* FIXME: Need to port to DVB v5.2 API
*
* 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 version 2.
*
* 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.
*/
#include <linux/kernel.h>
#include <asm/div64.h>
#include "dvb_frontend.h"
#include "s921.h"
static int debug = 1;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
#define rc(args...) do { \
printk(KERN_ERR "s921: " args); \
} while (0)
#define dprintk(args...) \
do { \
if (debug) { \
printk(KERN_DEBUG "s921: %s: ", __func__); \
printk(args); \
} \
} while (0)
struct s921_state {
struct i2c_adapter *i2c;
const struct s921_config *config;
struct dvb_frontend frontend;
/* The Demod can't easily provide these, we cache them */
u32 currentfreq;
};
/*
* Various tuner defaults need to be established for a given frequency kHz.
* fixme: The bounds on the bands do not match the doc in real life.
* fixme: Some of them have been moved, other might need adjustment.
*/
static struct s921_bandselect_val {
u32 freq_low;
u8 band_reg;
} s921_bandselect[] = {
{ 0, 0x7b },
{ 485140000, 0x5b },
{ 515140000, 0x3b },
{ 545140000, 0x1b },
{ 599140000, 0xfb },
{ 623140000, 0xdb },
{ 659140000, 0xbb },
{ 713140000, 0x9b },
};
struct regdata {
u8 reg;
u8 data;
};
static struct regdata s921_init[] = {
{ 0x01, 0x80 }, /* Probably, a reset sequence */
{ 0x01, 0x40 },
{ 0x01, 0x80 },
{ 0x01, 0x40 },
{ 0x02, 0x00 },
{ 0x03, 0x40 },
{ 0x04, 0x01 },
{ 0x05, 0x00 },
{ 0x06, 0x00 },
{ 0x07, 0x00 },
{ 0x08, 0x00 },
{ 0x09, 0x00 },
{ 0x0a, 0x00 },
{ 0x0b, 0x5a },
{ 0x0c, 0x00 },
{ 0x0d, 0x00 },
{ 0x0f, 0x00 },
{ 0x13, 0x1b },
{ 0x14, 0x80 },
{ 0x15, 0x40 },
{ 0x17, 0x70 },
{ 0x18, 0x01 },
{ 0x19, 0x12 },
{ 0x1a, 0x01 },
{ 0x1b, 0x12 },
{ 0x1c, 0xa0 },
{ 0x1d, 0x00 },
{ 0x1e, 0x0a },
{ 0x1f, 0x08 },
{ 0x20, 0x40 },
{ 0x21, 0xff },
{ 0x22, 0x4c },
{ 0x23, 0x4e },
{ 0x24, 0x4c },
{ 0x25, 0x00 },
{ 0x26, 0x00 },
{ 0x27, 0xf4 },
{ 0x28, 0x60 },
{ 0x29, 0x88 },
{ 0x2a, 0x40 },
{ 0x2b, 0x40 },
{ 0x2c, 0xff },
{ 0x2d, 0x00 },
{ 0x2e, 0xff },
{ 0x2f, 0x00 },
{ 0x30, 0x20 },
{ 0x31, 0x06 },
{ 0x32, 0x0c },
{ 0x34, 0x0f },
{ 0x37, 0xfe },
{ 0x38, 0x00 },
{ 0x39, 0x63 },
{ 0x3a, 0x10 },
{ 0x3b, 0x10 },
{ 0x47, 0x00 },
{ 0x49, 0xe5 },
{ 0x4b, 0x00 },
{ 0x50, 0xc0 },
{ 0x52, 0x20 },
{ 0x54, 0x5a },
{ 0x55, 0x5b },
{ 0x56, 0x40 },
{ 0x57, 0x70 },
{ 0x5c, 0x50 },
{ 0x5d, 0x00 },
{ 0x62, 0x17 },
{ 0x63, 0x2f },
{ 0x64, 0x6f },
{ 0x68, 0x00 },
{ 0x69, 0x89 },
{ 0x6a, 0x00 },
{ 0x6b, 0x00 },
{ 0x6c, 0x00 },
{ 0x6d, 0x00 },
{ 0x6e, 0x00 },
{ 0x70, 0x10 },
{ 0x71, 0x00 },
{ 0x75, 0x00 },
{ 0x76, 0x30 },
{ 0x77, 0x01 },
{ 0xaf, 0x00 },
{ 0xb0, 0xa0 },
{ 0xb2, 0x3d },
{ 0xb3, 0x25 },
{ 0xb4, 0x8b },
{ 0xb5, 0x4b },
{ 0xb6, 0x3f },
{ 0xb7, 0xff },
{ 0xb8, 0xff },
{ 0xb9, 0xfc },
{ 0xba, 0x00 },
{ 0xbb, 0x00 },
{ 0xbc, 0x00 },
{ 0xd0, 0x30 },
{ 0xe4, 0x84 },
{ 0xf0, 0x48 },
{ 0xf1, 0x19 },
{ 0xf2, 0x5a },
{ 0xf3, 0x8e },
{ 0xf4, 0x2d },
{ 0xf5, 0x07 },
{ 0xf6, 0x5a },
{ 0xf7, 0xba },
{ 0xf8, 0xd7 },
};
static struct regdata s921_prefreq[] = {
{ 0x47, 0x60 },
{ 0x68, 0x00 },
{ 0x69, 0x89 },
{ 0xf0, 0x48 },
{ 0xf1, 0x19 },
};
static struct regdata s921_postfreq[] = {
{ 0xf5, 0xae },
{ 0xf6, 0xb7 },
{ 0xf7, 0xba },
{ 0xf8, 0xd7 },
{ 0x68, 0x0a },
{ 0x69, 0x09 },
};
static int s921_i2c_writereg(struct s921_state *state,
u8 i2c_addr, int reg, int data)
{
u8 buf[] = { reg, data };
struct i2c_msg msg = {
.addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
};
int rc;
rc = i2c_transfer(state->i2c, &msg, 1);
if (rc != 1) {
printk("%s: writereg rcor(rc == %i, reg == 0x%02x,"
" data == 0x%02x)\n", __func__, rc, reg, data);
return rc;
}
return 0;
}
static int s921_i2c_writeregdata(struct s921_state *state, u8 i2c_addr,
struct regdata *rd, int size)
{
int i, rc;
for (i = 0; i < size; i++) {
rc = s921_i2c_writereg(state, i2c_addr, rd[i].reg, rd[i].data);
if (rc < 0)
return rc;
}
return 0;
}
static int s921_i2c_readreg(struct s921_state *state, u8 i2c_addr, u8 reg)
{
u8 val;
int rc;
struct i2c_msg msg[] = {
{ .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
{ .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
};
rc = i2c_transfer(state->i2c, msg, 2);
if (rc != 2) {
rc("%s: reg=0x%x (rcor=%d)\n", __func__, reg, rc);
return rc;
}
return val;
}
#define s921_readreg(state, reg) \
s921_i2c_readreg(state, state->config->demod_address, reg)
#define s921_writereg(state, reg, val) \
s921_i2c_writereg(state, state->config->demod_address, reg, val)
#define s921_writeregdata(state, regdata) \
s921_i2c_writeregdata(state, state->config->demod_address, \
regdata, ARRAY_SIZE(regdata))
static int s921_pll_tune(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct s921_state *state = fe->demodulator_priv;
int band, rc, i;
unsigned long f_offset;
u8 f_switch;
u64 offset;
dprintk("frequency=%i\n", p->frequency);
for (band = 0; band < ARRAY_SIZE(s921_bandselect); band++)
if (p->frequency < s921_bandselect[band].freq_low)
break;
band--;
if (band < 0) {
rc("%s: frequency out of range\n", __func__);
return -EINVAL;
}
f_switch = s921_bandselect[band].band_reg;
offset = ((u64)p->frequency) * 258;
do_div(offset, 6000000);
f_offset = ((unsigned long)offset) + 2321;
rc = s921_writeregdata(state, s921_prefreq);
if (rc < 0)
return rc;
rc = s921_writereg(state, 0xf2, (f_offset >> 8) & 0xff);
if (rc < 0)
return rc;
rc = s921_writereg(state, 0xf3, f_offset & 0xff);
if (rc < 0)
return rc;
rc = s921_writereg(state, 0xf4, f_switch);
if (rc < 0)
return rc;
rc = s921_writeregdata(state, s921_postfreq);
if (rc < 0)
return rc;
for (i = 0 ; i < 6; i++) {
rc = s921_readreg(state, 0x80);
dprintk("status 0x80: %02x\n", rc);
}
rc = s921_writereg(state, 0x01, 0x40);
if (rc < 0)
return rc;
rc = s921_readreg(state, 0x01);
dprintk("status 0x01: %02x\n", rc);
rc = s921_readreg(state, 0x80);
dprintk("status 0x80: %02x\n", rc);
rc = s921_readreg(state, 0x80);
dprintk("status 0x80: %02x\n", rc);
rc = s921_readreg(state, 0x32);
dprintk("status 0x32: %02x\n", rc);
dprintk("pll tune band=%d, pll=%d\n", f_switch, (int)f_offset);
return 0;
}
static int s921_initfe(struct dvb_frontend *fe)
{
struct s921_state *state = fe->demodulator_priv;
int rc;
dprintk("\n");
rc = s921_writeregdata(state, s921_init);
if (rc < 0)
return rc;
return 0;
}
static int s921_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
struct s921_state *state = fe->demodulator_priv;
int regstatus, rc;
*status = 0;
rc = s921_readreg(state, 0x81);
if (rc < 0)
return rc;
regstatus = rc << 8;
rc = s921_readreg(state, 0x82);
if (rc < 0)
return rc;
regstatus |= rc;
dprintk("status = %04x\n", regstatus);
/* Full Sync - We don't know what each bit means on regs 0x81/0x82 */
if ((regstatus & 0xff) == 0x40) {
*status = FE_HAS_SIGNAL |
FE_HAS_CARRIER |
FE_HAS_VITERBI |
FE_HAS_SYNC |
FE_HAS_LOCK;
} else if (regstatus & 0x40) {
/* This is close to Full Sync, but not enough to get useful info */
*status = FE_HAS_SIGNAL |
FE_HAS_CARRIER |
FE_HAS_VITERBI |
FE_HAS_SYNC;
}
return 0;
}
static int s921_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
enum fe_status status;
struct s921_state *state = fe->demodulator_priv;
int rc;
/* FIXME: Use the proper register for it... 0x80? */
rc = s921_read_status(fe, &status);
if (rc < 0)
return rc;
*strength = (status & FE_HAS_LOCK) ? 0xffff : 0;
dprintk("strength = 0x%04x\n", *strength);
rc = s921_readreg(state, 0x01);
dprintk("status 0x01: %02x\n", rc);
rc = s921_readreg(state, 0x80);
dprintk("status 0x80: %02x\n", rc);
rc = s921_readreg(state, 0x32);
dprintk("status 0x32: %02x\n", rc);
return 0;
}
static int s921_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct s921_state *state = fe->demodulator_priv;
int rc;
dprintk("\n");
/* FIXME: We don't know how to use non-auto mode */
rc = s921_pll_tune(fe);
if (rc < 0)
return rc;
state->currentfreq = p->frequency;
return 0;
}
static int s921_get_frontend(struct dvb_frontend *fe,
struct dtv_frontend_properties *p)
{
struct s921_state *state = fe->demodulator_priv;
/* FIXME: Probably it is possible to get it from regs f1 and f2 */
p->frequency = state->currentfreq;
p->delivery_system = SYS_ISDBT;
return 0;
}
static int s921_tune(struct dvb_frontend *fe,
bool re_tune,
unsigned int mode_flags,
unsigned int *delay,
enum fe_status *status)
{
int rc = 0;
dprintk("\n");
if (re_tune)
rc = s921_set_frontend(fe);
if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
s921_read_status(fe, status);
return rc;
}
static int s921_get_algo(struct dvb_frontend *fe)
{
return DVBFE_ALGO_HW;
}
static void s921_release(struct dvb_frontend *fe)
{
struct s921_state *state = fe->demodulator_priv;
dprintk("\n");
kfree(state);
}
static struct dvb_frontend_ops s921_ops;
struct dvb_frontend *s921_attach(const struct s921_config *config,
struct i2c_adapter *i2c)
{
/* allocate memory for the internal state */
struct s921_state *state =
kzalloc(sizeof(struct s921_state), GFP_KERNEL);
dprintk("\n");
if (!state) {
rc("Unable to kzalloc\n");
return NULL;
}
/* setup the state */
state->config = config;
state->i2c = i2c;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &s921_ops,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
}
EXPORT_SYMBOL(s921_attach);
static struct dvb_frontend_ops s921_ops = {
.delsys = { SYS_ISDBT },
/* Use dib8000 values per default */
.info = {
.name = "Sharp S921",
.frequency_min = 470000000,
/*
* Max should be 770MHz instead, according with Sharp docs,
* but Leadership doc says it works up to 806 MHz. This is
* required to get channel 69, used in Brazil
*/
.frequency_max = 806000000,
.frequency_tolerance = 0,
.caps = FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_RECOVER |
FE_CAN_HIERARCHY_AUTO,
},
.release = s921_release,
.init = s921_initfe,
.set_frontend = s921_set_frontend,
.get_frontend = s921_get_frontend,
.read_status = s921_read_status,
.read_signal_strength = s921_read_signal_strength,
.tune = s921_tune,
.get_frontend_algo = s921_get_algo,
};
MODULE_DESCRIPTION("DVB Frontend module for Sharp S921 hardware");
MODULE_AUTHOR("Mauro Carvalho Chehab");
MODULE_AUTHOR("Douglas Landgraf <dougsland@redhat.com>");
MODULE_LICENSE("GPL");
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