/*
* 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/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)");
static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END };
I2C_CLIENT_INSMOD;
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_INT_G_REGISTER:
{
struct v4l2_register *reg = arg;
if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
return -EINVAL;
reg->val = upd64031a_read(client, reg->reg & 0xff);
break;
}
case VIDIOC_INT_S_REGISTER:
{
struct v4l2_register *reg = arg;
u8 addr = reg->reg & 0xff;
u8 val = reg->val & 0xff;
if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
upd64031a_write(client, addr, val);
break;
}
#endif
default:
break;
}
return 0;
}
/* ------------------------------------------------------------------------ */
/* i2c implementation */
static struct i2c_driver i2c_driver;
static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *client;
struct upd64031a_state *state;
int i;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return 0;
client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (client == NULL) {
return -ENOMEM;
}
client->addr = address;
client->adapter = adapter;
client->driver = &i2c_driver;
snprintf(client->name, sizeof(client->name) - 1, "uPD64031A");
v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
if (state == NULL) {
kfree(client);
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]);
}
i2c_attach_client(client);
return 0;
}
static int upd64031a_probe(struct i2c_adapter *adapter)
{
if (adapter->class & I2C_CLASS_TV_ANALOG)
return i2c_probe(adapter, &addr_data, upd64031a_attach);
return 0;
}
static int upd64031a_detach(struct i2c_client *client)
{
int err;
err = i2c_detach_client(client);
if (err)
return err;
kfree(client);
return 0;
}
/* ----------------------------------------------------------------------- */
/* i2c implementation */
static struct i2c_driver i2c_driver = {
.driver = {
.name = "upd64031a",
},
.id = I2C_DRIVERID_UPD64031A,
.attach_adapter = upd64031a_probe,
.detach_client = upd64031a_detach,
.command = upd64031a_command,
};
static int __init upd64031a_init_module(void)
{
return i2c_add_driver(&i2c_driver);
}
static void __exit upd64031a_exit_module(void)
{
i2c_del_driver(&i2c_driver);
}
module_init(upd64031a_init_module);
module_exit(upd64031a_exit_module);
