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/*
* Driver for Sharp s921 driver
*
* Copyright (C) 2008 Markus Rechberger <mrechberger@sundtek.de>
*
* All rights reserved.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include "dvb_frontend.h"
#include "s921_module.h"
#include "s921_core.h"
static unsigned int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,"s921 debugging (default off)");
#define dprintk(fmt, args...) if (debug) do {\
printk("s921 debug: " fmt, ##args); } while (0)
struct s921_state
{
struct dvb_frontend frontend;
fe_modulation_t current_modulation;
__u32 snr;
__u32 current_frequency;
__u8 addr;
struct s921_isdb_t dev;
struct i2c_adapter *i2c;
};
static int s921_set_parameters(struct dvb_frontend *fe, struct dvb_frontend_parameters *param) {
struct s921_state *state = (struct s921_state *)fe->demodulator_priv;
struct s921_isdb_t_transmission_mode_params params;
struct s921_isdb_t_tune_params tune_params;
tune_params.frequency = param->frequency;
s921_isdb_cmd(&state->dev, ISDB_T_CMD_SET_PARAM, ¶ms);
s921_isdb_cmd(&state->dev, ISDB_T_CMD_TUNE, &tune_params);
mdelay(100);
return 0;
}
static int s921_init(struct dvb_frontend *fe) {
printk("s921 init\n");
return 0;
}
static int s921_sleep(struct dvb_frontend *fe) {
printk("s921 sleep\n");
return 0;
}
static int s921_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct s921_state *state = (struct s921_state *)fe->demodulator_priv;
unsigned int ret;
mdelay(5);
s921_isdb_cmd(&state->dev, ISDB_T_CMD_GET_STATUS, &ret);
*status = 0;
printk("status: %02x\n", ret);
if (ret == 1) {
*status |= FE_HAS_CARRIER;
*status |= FE_HAS_VITERBI;
*status |= FE_HAS_LOCK;
*status |= FE_HAS_SYNC;
*status |= FE_HAS_SIGNAL;
}
return 0;
}
static int s921_read_ber(struct dvb_frontend *fe, __u32 *ber)
{
dprintk("read ber\n");
return 0;
}
static int s921_read_snr(struct dvb_frontend *fe, __u16 *snr)
{
dprintk("read snr\n");
return 0;
}
static int s921_read_ucblocks(struct dvb_frontend *fe, __u32 *ucblocks)
{
dprintk("read ucblocks\n");
return 0;
}
static void s921_release(struct dvb_frontend *fe)
{
struct s921_state *state = (struct s921_state *)fe->demodulator_priv;
kfree(state);
}
static struct dvb_frontend_ops demod_s921={
.info = {
.name = "SHARP S921",
.type = FE_OFDM,
.frequency_min = 473143000,
.frequency_max = 767143000,
.frequency_stepsize = 6000000,
.frequency_tolerance = 0,
.caps = 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_HIERARCHY_AUTO | FE_CAN_RECOVER |
FE_CAN_MUTE_TS
},
.init = s921_init,
.sleep = s921_sleep,
.set_frontend = s921_set_parameters,
.read_snr = s921_read_snr,
.read_ber = s921_read_ber,
.read_status = s921_read_status,
.read_ucblocks = s921_read_ucblocks,
.release = s921_release,
};
static int s921_write(void *dev, u8 reg, u8 val) {
struct s921_state *state = dev;
char buf[2]={reg,val};
int err;
struct i2c_msg i2cmsgs = {
.addr = state->addr,
.flags = 0,
.len = 2,
.buf = buf
};
if((err = i2c_transfer(state->i2c, &i2cmsgs, 1))<0) {
printk("%s i2c_transfer error %d\n", __func__, err);
if (err < 0)
return err;
else
return -EREMOTEIO;
}
return 0;
}
static int s921_read(void *dev, u8 reg) {
struct s921_state *state = dev;
u8 b1;
int ret;
struct i2c_msg msg[2] = { { .addr = state->addr,
.flags = 0,
.buf = ®, .len = 1 },
{ .addr = state->addr,
.flags = I2C_M_RD,
.buf = &b1, .len = 1 } };
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2)
return ret;
return b1;
}
struct dvb_frontend* s921_attach(const struct s921_config *config,
struct i2c_adapter *i2c)
{
struct s921_state *state;
state = kzalloc(sizeof(struct s921_state), GFP_KERNEL);
if (state == NULL)
return NULL;
state->addr = config->i2c_address;
state->i2c = i2c;
state->dev.i2c_write = &s921_write;
state->dev.i2c_read = &s921_read;
state->dev.priv_dev = state;
s921_isdb_cmd(&state->dev, ISDB_T_CMD_INIT, NULL);
memcpy(&state->frontend.ops, &demod_s921, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
}
EXPORT_SYMBOL_GPL(s921_attach);
MODULE_AUTHOR("Markus Rechberger <mrechberger@empiatech.com>");
MODULE_DESCRIPTION("Sharp S921 ISDB-T 1Seg");
MODULE_LICENSE("GPL");
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