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/*
* upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
*
* 2003 by T.Adachi (tadachi@tadachi-net.com)
* 2003 by Takeru KOMORIYA <komoriya@paken.org>
* 2006 by Hans Verkuil <hverkuil@xs4all.nl>
*
* 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; either version 2
* of the License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-i2c-drv-legacy.h>
#include <media/upd64083.h>
MODULE_DESCRIPTION("uPD64083 driver");
MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
MODULE_LICENSE("GPL");
static int debug = 0;
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
enum {
R00 = 0, R01, R02, R03, R04,
R05, R06, R07, R08, R09,
R0A, R0B, R0C, R0D, R0E, R0F,
R10, R11, R12, R13, R14,
R15, R16,
TOT_REGS
};
struct upd64083_state {
u8 mode;
u8 ext_y_adc;
u8 regs[TOT_REGS];
};
/* Initial values when used in combination with the
NEC upd64031a ghost reduction chip. */
static u8 upd64083_init[] = {
0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */
0x36, 0xdd, 0x05, 0x56, 0x48,
0x00, 0x3a, 0xa0, 0x05, 0x08,
0x44, 0x60, 0x08, 0x52, 0xf8,
0x53, 0x60, 0x10
};
/* ------------------------------------------------------------------------ */
static void upd64083_log_status(struct i2c_client *client)
{
u8 buf[7];
i2c_master_recv(client, buf, 7);
v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
"SA04=%02x SA05=%02x SA06=%02x\n",
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
}
/* ------------------------------------------------------------------------ */
static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
{
u8 buf[2];
buf[0] = reg;
buf[1] = val;
v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val);
if (i2c_master_send(client, buf, 2) != 2)
v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
}
/* ------------------------------------------------------------------------ */
#ifdef CONFIG_VIDEO_ADV_DEBUG
static u8 upd64083_read(struct i2c_client *client, u8 reg)
{
u8 buf[7];
if (reg >= sizeof(buf))
return 0xff;
i2c_master_recv(client, buf, sizeof(buf));
return buf[reg];
}
#endif
/* ------------------------------------------------------------------------ */
static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
struct upd64083_state *state = i2c_get_clientdata(client);
struct v4l2_routing *route = arg;
switch (cmd) {
case VIDIOC_INT_G_VIDEO_ROUTING:
route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
route->output = 0;
break;
case VIDIOC_INT_S_VIDEO_ROUTING:
{
u8 r00, r02;
if (route->input > 7 || (route->input & 6) == 6)
return -EINVAL;
state->mode = (route->input & 3) << 6;
state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
upd64083_write(client, R00, r00);
upd64083_write(client, R02, r02);
break;
}
case VIDIOC_LOG_STATUS:
upd64083_log_status(client);
break;
#ifdef CONFIG_VIDEO_ADV_DEBUG
case VIDIOC_DBG_G_REGISTER:
case VIDIOC_DBG_S_REGISTER:
{
struct v4l2_register *reg = arg;
if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (cmd == VIDIOC_DBG_G_REGISTER)
reg->val = upd64083_read(client, reg->reg & 0xff);
else
upd64083_write(client, reg->reg & 0xff, reg->val & 0xff);
break;
}
#endif
case VIDIOC_G_CHIP_IDENT:
return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64083, 0);
default:
break;
}
return 0;
}
/* ------------------------------------------------------------------------ */
/* i2c implementation */
static int upd64083_probe(struct i2c_client *client)
{
struct upd64083_state *state;
int i;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
if (state == NULL) {
return -ENOMEM;
}
i2c_set_clientdata(client, state);
/* Initially assume that a ghost reduction chip is present */
state->mode = 0; /* YCS mode */
state->ext_y_adc = (1 << 5);
memcpy(state->regs, upd64083_init, TOT_REGS);
for (i = 0; i < TOT_REGS; i++) {
upd64083_write(client, i, state->regs[i]);
}
return 0;
}
static int upd64083_remove(struct i2c_client *client)
{
kfree(i2c_get_clientdata(client));
return 0;
}
/* ----------------------------------------------------------------------- */
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
.name = "upd64083",
.driverid = I2C_DRIVERID_UPD64083,
.command = upd64083_command,
.probe = upd64083_probe,
.remove = upd64083_remove,
};
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