/*
* upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
*
* 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., 675 Mass Ave, Cambridge, MA 02139, 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.h>
#include <media/upd64031a.h>
// --------------------- read registers functions define -----------------------
/* bit masks */
#define GR_MODE_MASK 0xc0
#define DIRECT_3DYCS_CONNECT_MASK 0xc0
#define SYNC_CIRCUIT_MASK 0xa0
// -----------------------------------------------------------------------------
MODULE_DESCRIPTION("uPD64031A driver");
MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
MODULE_LICENSE("GPL");
static int debug = 0;
module_param(debug, int, 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,
/* unused registers
R10, R11, R12, R13, R14,
R15, R16, R17,
*/
TOT_REGS
};
struct upd64031a_state {
u8 regs[TOT_REGS];
u8 gr_mode;
u8 direct_3dycs_connect;
u8 ext_comp_sync;
u8 ext_vert_sync;
};
static u8 upd64031a_init[] = {
0x00, 0xb8, 0x48, 0xd2, 0xe6,
0x03, 0x10, 0x0b, 0xaf, 0x7f,
0x00, 0x00, 0x1d, 0x5e, 0x00,
0xd0
};
/* ------------------------------------------------------------------------ */
static u8 upd64031a_read(struct i2c_client *client, u8 reg)
{
u8 buf[2];
if (reg >= sizeof(buf))
return 0xff;
i2c_master_recv(client, buf, 2);
return buf[reg];
}
/* ------------------------------------------------------------------------ */
static void upd64031a_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);
}
/* ------------------------------------------------------------------------ */
/* The input changed due to new input or channel changed */
static void upd64031a_change(struct i2c_client *client)
{
struct upd64031a_state *state = i2c_get_clientdata(client);
u8 reg = state->regs[R00];
v4l_dbg(1, debug, client, "changed input or channel\n");
upd64031a_write(client, R00, reg | 0x10);
upd64031a_write(client, R00, reg & ~0x10);
}
/* ------------------------------------------------------------------------ */
static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
struct upd64031a_state *state = i2c_get_clientdata(client);
struct v4l2_routing *route = arg;
switch (cmd) {
case VIDIOC_S_FREQUENCY:
upd64031a_change(client);
break;
case VIDIOC_INT_G_VIDEO_ROUTING:
route->input = (state->gr_mode >> 6) |
(state->direct_3dycs_connect >> 4) |
(state->ext_comp_sync >> 1) |
(state->ext_vert_sync >> 2);
route->output = 0;
break;
case VIDIOC_INT_S_VIDEO_ROUTING:
{
u8 r00, r05, r08;
state->gr_mode = (route->input & 3) << 6;
state->direct_3dycs_connect = (route->input & 0xc) << 4;
state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2;
r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
state->ext_comp_sync | state->ext_vert_sync;
r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
state->direct_3dycs_connect;
upd64031a_write(client, R00, r00);
upd64031a_write(client, R05, r05);
upd64031a_write(client, R08, r08);
upd64031a_change(client);
break;
}
case VIDIOC_LOG_STATUS:
v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
upd64031a_read(client, 0), upd64031a_read(client, 1));
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 = upd64031a_read(client, reg->reg & 0xff);
else
upd64031a_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_UPD64031A, 0);
default:
break;
}
return 0;
}
/* ------------------------------------------------------------------------ */
/* i2c implementation */
static int upd64031a_probe(struct i2c_client *client)
{
struct upd64031a_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 upd64031a_state), GFP_KERNEL);
if (state == NULL) {
return -ENOMEM;
}
i2c_set_clientdata(client, state);
memcpy(state->regs, upd64031a_init, sizeof(state->regs));
state->gr_mode = UPD64031A_GR_ON << 6;
state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
state->ext_comp_sync = state->ext_vert_sync = 0;
for (i = 0; i < TOT_REGS; i++) {
upd64031a_write(client, i, state->regs[i]);
}
return 0;
}
static int upd64031a_remove(struct i2c_client *client)
{
kfree(i2c_get_clientdata(client));
return 0;
}
/* ----------------------------------------------------------------------- */
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
.name = "upd64031a",
.driverid = I2C_DRIVERID_UPD64031A,
.command = upd64031a_command,
.probe = upd64031a_probe,
.remove = upd64031a_remove,
};
