287 lines
7.1 KiB
C
287 lines
7.1 KiB
C
/*
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* upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
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*
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* 2003 by T.Adachi <tadachi@tadachi-net.com>
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* 2003 by Takeru KOMORIYA <komoriya@paken.org>
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* 2006 by Hans Verkuil <hverkuil@xs4all.nl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/version.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <media/upd64031a.h>
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// --------------------- read registers functions define -----------------------
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/* bit masks */
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#define GR_MODE_MASK 0xc0
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#define DIRECT_3DYCS_CONNECT_MASK 0xc0
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#define SYNC_CIRCUIT_MASK 0xa0
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// -----------------------------------------------------------------------------
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MODULE_DESCRIPTION("uPD64031A driver");
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MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
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MODULE_LICENSE("GPL");
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static int debug = 0;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Debug level (0-1)");
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static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END };
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I2C_CLIENT_INSMOD;
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enum {
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R00 = 0, R01, R02, R03, R04,
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R05, R06, R07, R08, R09,
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R0A, R0B, R0C, R0D, R0E, R0F,
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/* unused registers
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R10, R11, R12, R13, R14,
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R15, R16, R17,
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*/
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TOT_REGS
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};
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struct upd64031a_state {
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u8 regs[TOT_REGS];
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u8 gr_mode;
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u8 direct_3dycs_connect;
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u8 ext_comp_sync;
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u8 ext_vert_sync;
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};
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static u8 upd64031a_init[] = {
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0x00, 0xb8, 0x48, 0xd2, 0xe6,
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0x03, 0x10, 0x0b, 0xaf, 0x7f,
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0x00, 0x00, 0x1d, 0x5e, 0x00,
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0xd0
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};
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/* ------------------------------------------------------------------------ */
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static u8 upd64031a_read(struct i2c_client *client, u8 reg)
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{
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u8 buf[2];
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if (reg >= sizeof(buf))
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return 0xff;
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i2c_master_recv(client, buf, 2);
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return buf[reg];
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}
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/* ------------------------------------------------------------------------ */
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static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
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{
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u8 buf[2];
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buf[0] = reg;
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buf[1] = val;
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v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val);
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if (i2c_master_send(client, buf, 2) != 2)
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v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
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}
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/* ------------------------------------------------------------------------ */
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/* The input changed due to new input or channel changed */
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static void upd64031a_change(struct i2c_client *client)
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{
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struct upd64031a_state *state = i2c_get_clientdata(client);
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u8 reg = state->regs[R00];
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v4l_dbg(1, debug, client, "changed input or channel\n");
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upd64031a_write(client, R00, reg | 0x10);
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upd64031a_write(client, R00, reg & ~0x10);
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}
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/* ------------------------------------------------------------------------ */
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static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
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{
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struct upd64031a_state *state = i2c_get_clientdata(client);
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struct v4l2_routing *route = arg;
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switch (cmd) {
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case VIDIOC_S_FREQUENCY:
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upd64031a_change(client);
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break;
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case VIDIOC_INT_G_VIDEO_ROUTING:
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route->input = (state->gr_mode >> 6) |
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(state->direct_3dycs_connect >> 4) |
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(state->ext_comp_sync >> 1) |
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(state->ext_vert_sync >> 2);
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route->output = 0;
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break;
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case VIDIOC_INT_S_VIDEO_ROUTING:
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{
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u8 r00, r05, r08;
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state->gr_mode = (route->input & 3) << 6;
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state->direct_3dycs_connect = (route->input & 0xc) << 4;
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state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
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state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2;
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r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
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r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
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state->ext_comp_sync | state->ext_vert_sync;
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r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
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state->direct_3dycs_connect;
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upd64031a_write(client, R00, r00);
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upd64031a_write(client, R05, r05);
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upd64031a_write(client, R08, r08);
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upd64031a_change(client);
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break;
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}
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case VIDIOC_LOG_STATUS:
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v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
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upd64031a_read(client, 0), upd64031a_read(client, 1));
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break;
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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case VIDIOC_INT_G_REGISTER:
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{
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struct v4l2_register *reg = arg;
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if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
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return -EINVAL;
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reg->val = upd64031a_read(client, reg->reg & 0xff);
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break;
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}
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case VIDIOC_INT_S_REGISTER:
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{
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struct v4l2_register *reg = arg;
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u8 addr = reg->reg & 0xff;
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u8 val = reg->val & 0xff;
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if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
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return -EINVAL;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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upd64031a_write(client, addr, val);
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break;
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}
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#endif
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default:
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break;
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}
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return 0;
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}
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/* ------------------------------------------------------------------------ */
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/* i2c implementation */
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static struct i2c_driver i2c_driver;
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static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
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{
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struct i2c_client *client;
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struct upd64031a_state *state;
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int i;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return 0;
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client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (client == NULL) {
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return -ENOMEM;
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}
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client->addr = address;
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client->adapter = adapter;
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client->driver = &i2c_driver;
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snprintf(client->name, sizeof(client->name) - 1, "uPD64031A");
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v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
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state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
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if (state == NULL) {
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kfree(client);
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return -ENOMEM;
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}
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i2c_set_clientdata(client, state);
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memcpy(state->regs, upd64031a_init, sizeof(state->regs));
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state->gr_mode = UPD64031A_GR_ON << 6;
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state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
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state->ext_comp_sync = state->ext_vert_sync = 0;
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for (i = 0; i < TOT_REGS; i++) {
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upd64031a_write(client, i, state->regs[i]);
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}
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i2c_attach_client(client);
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return 0;
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}
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static int upd64031a_probe(struct i2c_adapter *adapter)
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{
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if (adapter->class & I2C_CLASS_TV_ANALOG)
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return i2c_probe(adapter, &addr_data, upd64031a_attach);
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return 0;
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}
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static int upd64031a_detach(struct i2c_client *client)
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{
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int err;
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err = i2c_detach_client(client);
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if (err)
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return err;
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kfree(client);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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/* i2c implementation */
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static struct i2c_driver i2c_driver = {
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.driver = {
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.name = "upd64031a",
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},
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.id = I2C_DRIVERID_UPD64031A,
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.attach_adapter = upd64031a_probe,
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.detach_client = upd64031a_detach,
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.command = upd64031a_command,
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};
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static int __init upd64031a_init_module(void)
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{
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return i2c_add_driver(&i2c_driver);
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}
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static void __exit upd64031a_exit_module(void)
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{
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i2c_del_driver(&i2c_driver);
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}
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module_init(upd64031a_init_module);
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module_exit(upd64031a_exit_module);
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