2006-07-29 16:33:44 -04:00
|
|
|
#include <linux/i2c.h>
|
|
|
|
|
|
|
|
#include "dibx000_common.h"
|
|
|
|
|
|
|
|
static int debug;
|
|
|
|
module_param(debug, int, 0644);
|
|
|
|
MODULE_PARM_DESC(debug, "turn on debugging (default: 0)");
|
|
|
|
|
2009-12-04 11:27:57 -05:00
|
|
|
#define dprintk(args...) do { if (debug) { printk(KERN_DEBUG "DiBX000: "); printk(args); printk("\n"); } } while (0)
|
2006-07-29 16:33:44 -04:00
|
|
|
|
|
|
|
static int dibx000_write_word(struct dibx000_i2c_master *mst, u16 reg, u16 val)
|
|
|
|
{
|
|
|
|
u8 b[4] = {
|
|
|
|
(reg >> 8) & 0xff, reg & 0xff,
|
|
|
|
(val >> 8) & 0xff, val & 0xff,
|
|
|
|
};
|
|
|
|
struct i2c_msg msg = {
|
2009-08-17 06:01:10 -04:00
|
|
|
.addr = mst->i2c_addr,.flags = 0,.buf = b,.len = 4
|
2006-07-29 16:33:44 -04:00
|
|
|
};
|
|
|
|
return i2c_transfer(mst->i2c_adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
static int dibx000_i2c_select_interface(struct dibx000_i2c_master *mst,
|
|
|
|
enum dibx000_i2c_interface intf)
|
2006-07-29 16:33:44 -04:00
|
|
|
{
|
|
|
|
if (mst->device_rev > DIB3000MC && mst->selected_interface != intf) {
|
2009-12-04 11:27:57 -05:00
|
|
|
dprintk("selecting interface: %d", intf);
|
2006-07-29 16:33:44 -04:00
|
|
|
mst->selected_interface = intf;
|
|
|
|
return dibx000_write_word(mst, mst->base_reg + 4, intf);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
static int dibx000_i2c_gate_ctrl(struct dibx000_i2c_master *mst, u8 tx[4],
|
|
|
|
u8 addr, int onoff)
|
2006-07-29 16:33:44 -04:00
|
|
|
{
|
|
|
|
u16 val;
|
|
|
|
|
|
|
|
|
|
|
|
if (onoff)
|
2009-08-17 06:01:10 -04:00
|
|
|
val = addr << 8; // bit 7 = use master or not, if 0, the gate is open
|
2006-07-29 16:33:44 -04:00
|
|
|
else
|
|
|
|
val = 1 << 7;
|
|
|
|
|
|
|
|
if (mst->device_rev > DIB7000)
|
|
|
|
val <<= 1;
|
|
|
|
|
|
|
|
tx[0] = (((mst->base_reg + 1) >> 8) & 0xff);
|
2009-08-17 06:01:10 -04:00
|
|
|
tx[1] = ((mst->base_reg + 1) & 0xff);
|
2006-07-29 16:33:44 -04:00
|
|
|
tx[2] = val >> 8;
|
|
|
|
tx[3] = val & 0xff;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static u32 dibx000_i2c_func(struct i2c_adapter *adapter)
|
|
|
|
{
|
|
|
|
return I2C_FUNC_I2C;
|
|
|
|
}
|
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
static int dibx000_i2c_gated_tuner_xfer(struct i2c_adapter *i2c_adap,
|
|
|
|
struct i2c_msg msg[], int num)
|
2006-07-29 16:33:44 -04:00
|
|
|
{
|
|
|
|
struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
|
|
|
|
struct i2c_msg m[2 + num];
|
|
|
|
u8 tx_open[4], tx_close[4];
|
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
memset(m, 0, sizeof(struct i2c_msg) * (2 + num));
|
2006-07-29 16:33:44 -04:00
|
|
|
|
|
|
|
dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_TUNER);
|
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
dibx000_i2c_gate_ctrl(mst, tx_open, msg[0].addr, 1);
|
2006-07-29 16:33:44 -04:00
|
|
|
m[0].addr = mst->i2c_addr;
|
2009-08-17 06:01:10 -04:00
|
|
|
m[0].buf = tx_open;
|
|
|
|
m[0].len = 4;
|
2006-07-29 16:33:44 -04:00
|
|
|
|
|
|
|
memcpy(&m[1], msg, sizeof(struct i2c_msg) * num);
|
|
|
|
|
|
|
|
dibx000_i2c_gate_ctrl(mst, tx_close, 0, 0);
|
2009-08-17 06:01:10 -04:00
|
|
|
m[num + 1].addr = mst->i2c_addr;
|
|
|
|
m[num + 1].buf = tx_close;
|
|
|
|
m[num + 1].len = 4;
|
2006-07-29 16:33:44 -04:00
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
return i2c_transfer(mst->i2c_adap, m, 2 + num) == 2 + num ? num : -EIO;
|
2006-07-29 16:33:44 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct i2c_algorithm dibx000_i2c_gated_tuner_algo = {
|
2009-08-17 06:01:10 -04:00
|
|
|
.master_xfer = dibx000_i2c_gated_tuner_xfer,
|
2006-07-29 16:33:44 -04:00
|
|
|
.functionality = dibx000_i2c_func,
|
|
|
|
};
|
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
struct i2c_adapter *dibx000_get_i2c_adapter(struct dibx000_i2c_master *mst,
|
|
|
|
enum dibx000_i2c_interface intf,
|
|
|
|
int gating)
|
2006-07-29 16:33:44 -04:00
|
|
|
{
|
|
|
|
struct i2c_adapter *i2c = NULL;
|
|
|
|
|
|
|
|
switch (intf) {
|
2009-08-17 06:01:10 -04:00
|
|
|
case DIBX000_I2C_INTERFACE_TUNER:
|
|
|
|
if (gating)
|
|
|
|
i2c = &mst->gated_tuner_i2c_adap;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
printk(KERN_ERR "DiBX000: incorrect I2C interface selected\n");
|
|
|
|
break;
|
2006-07-29 16:33:44 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
return i2c;
|
|
|
|
}
|
2009-08-17 06:01:10 -04:00
|
|
|
|
2006-07-29 16:33:44 -04:00
|
|
|
EXPORT_SYMBOL(dibx000_get_i2c_adapter);
|
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
void dibx000_reset_i2c_master(struct dibx000_i2c_master *mst)
|
|
|
|
{
|
|
|
|
/* initialize the i2c-master by closing the gate */
|
|
|
|
u8 tx[4];
|
|
|
|
struct i2c_msg m = {.addr = mst->i2c_addr,.buf = tx,.len = 4 };
|
|
|
|
|
|
|
|
dibx000_i2c_gate_ctrl(mst, tx, 0, 0);
|
|
|
|
i2c_transfer(mst->i2c_adap, &m, 1);
|
|
|
|
mst->selected_interface = 0xff; // the first time force a select of the I2C
|
|
|
|
dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_TUNER);
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(dibx000_reset_i2c_master);
|
|
|
|
|
|
|
|
static int i2c_adapter_init(struct i2c_adapter *i2c_adap,
|
|
|
|
struct i2c_algorithm *algo, const char *name,
|
|
|
|
struct dibx000_i2c_master *mst)
|
2006-07-29 16:33:44 -04:00
|
|
|
{
|
2007-05-01 17:26:28 -04:00
|
|
|
strncpy(i2c_adap->name, name, sizeof(i2c_adap->name));
|
2009-08-17 06:01:10 -04:00
|
|
|
i2c_adap->class = I2C_CLASS_TV_DIGITAL, i2c_adap->algo = algo;
|
2006-07-29 16:33:44 -04:00
|
|
|
i2c_adap->algo_data = NULL;
|
|
|
|
i2c_set_adapdata(i2c_adap, mst);
|
|
|
|
if (i2c_add_adapter(i2c_adap) < 0)
|
|
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
int dibx000_init_i2c_master(struct dibx000_i2c_master *mst, u16 device_rev,
|
|
|
|
struct i2c_adapter *i2c_adap, u8 i2c_addr)
|
2006-07-29 16:33:44 -04:00
|
|
|
{
|
|
|
|
u8 tx[4];
|
2009-08-17 06:01:10 -04:00
|
|
|
struct i2c_msg m = {.addr = i2c_addr >> 1,.buf = tx,.len = 4 };
|
2006-07-29 16:33:44 -04:00
|
|
|
|
|
|
|
mst->device_rev = device_rev;
|
2009-08-17 06:01:10 -04:00
|
|
|
mst->i2c_adap = i2c_adap;
|
|
|
|
mst->i2c_addr = i2c_addr >> 1;
|
2006-07-29 16:33:44 -04:00
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
if (device_rev == DIB7000P || device_rev == DIB8000)
|
2006-07-29 16:33:44 -04:00
|
|
|
mst->base_reg = 1024;
|
|
|
|
else
|
|
|
|
mst->base_reg = 768;
|
|
|
|
|
2009-08-17 06:01:10 -04:00
|
|
|
if (i2c_adapter_init
|
|
|
|
(&mst->gated_tuner_i2c_adap, &dibx000_i2c_gated_tuner_algo,
|
|
|
|
"DiBX000 tuner I2C bus", mst) != 0)
|
|
|
|
printk(KERN_ERR
|
|
|
|
"DiBX000: could not initialize the tuner i2c_adapter\n");
|
2006-07-29 16:33:44 -04:00
|
|
|
|
|
|
|
/* initialize the i2c-master by closing the gate */
|
|
|
|
dibx000_i2c_gate_ctrl(mst, tx, 0, 0);
|
|
|
|
|
|
|
|
return i2c_transfer(i2c_adap, &m, 1) == 1;
|
|
|
|
}
|
2009-08-17 06:01:10 -04:00
|
|
|
|
2006-07-29 16:33:44 -04:00
|
|
|
EXPORT_SYMBOL(dibx000_init_i2c_master);
|
|
|
|
|
|
|
|
void dibx000_exit_i2c_master(struct dibx000_i2c_master *mst)
|
|
|
|
{
|
|
|
|
i2c_del_adapter(&mst->gated_tuner_i2c_adap);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(dibx000_exit_i2c_master);
|
2006-08-06 07:49:09 -04:00
|
|
|
|
2009-12-04 11:27:57 -05:00
|
|
|
|
2010-02-14 21:39:32 -05:00
|
|
|
u32 systime(void)
|
2009-12-04 11:27:57 -05:00
|
|
|
{
|
|
|
|
struct timespec t;
|
|
|
|
|
|
|
|
t = current_kernel_time();
|
|
|
|
return (t.tv_sec * 10000) + (t.tv_nsec / 100000);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(systime);
|
|
|
|
|
2006-08-06 07:49:09 -04:00
|
|
|
MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
|
|
|
|
MODULE_DESCRIPTION("Common function the DiBcom demodulator family");
|
|
|
|
MODULE_LICENSE("GPL");
|