263 lines
6.3 KiB
C
263 lines
6.3 KiB
C
/*
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* upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
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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
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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/upd64083.h>
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MODULE_DESCRIPTION("uPD64083 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, bool, 0644);
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MODULE_PARM_DESC(debug, "Debug level (0-1)");
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static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 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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R10, R11, R12, R13, R14,
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R15, R16,
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TOT_REGS
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};
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struct upd64083_state {
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u8 mode;
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u8 ext_y_adc;
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u8 regs[TOT_REGS];
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};
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/* Initial values when used in combination with the
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NEC upd64031a ghost reduction chip. */
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static u8 upd64083_init[] = {
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0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */
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0x36, 0xdd, 0x05, 0x56, 0x48,
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0x00, 0x3a, 0xa0, 0x05, 0x08,
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0x44, 0x60, 0x08, 0x52, 0xf8,
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0x53, 0x60, 0x10
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};
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/* ------------------------------------------------------------------------ */
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static void upd64083_log_status(struct i2c_client *client)
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{
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u8 buf[7];
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i2c_master_recv(client, buf, 7);
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v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
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"SA04=%02x SA05=%02x SA06=%02x\n",
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buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
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}
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/* ------------------------------------------------------------------------ */
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static void upd64083_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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#ifdef CONFIG_VIDEO_ADV_DEBUG
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static u8 upd64083_read(struct i2c_client *client, u8 reg)
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{
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u8 buf[7];
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if (reg >= sizeof(buf))
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return 0xff;
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i2c_master_recv(client, buf, sizeof(buf));
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return buf[reg];
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}
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#endif
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/* ------------------------------------------------------------------------ */
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static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
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{
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struct upd64083_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_INT_G_VIDEO_ROUTING:
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route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
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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, r02;
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if (route->input > 7 || (route->input & 6) == 6)
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return -EINVAL;
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state->mode = (route->input & 3) << 6;
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state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
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r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
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r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
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upd64083_write(client, R00, r00);
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upd64083_write(client, R02, r02);
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break;
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}
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case VIDIOC_LOG_STATUS:
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upd64083_log_status(client);
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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_UPD64083)
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return -EINVAL;
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reg->val = upd64083_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_UPD64083)
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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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upd64083_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 upd64083_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 upd64083_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, "uPD64083");
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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 upd64083_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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/* Initially assume that a ghost reduction chip is present */
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state->mode = 0; /* YCS mode */
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state->ext_y_adc = (1 << 5);
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memcpy(state->regs, upd64083_init, TOT_REGS);
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for (i = 0; i < TOT_REGS; i++) {
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upd64083_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 upd64083_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, upd64083_attach);
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return 0;
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}
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static int upd64083_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 = "upd64083",
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},
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.id = I2C_DRIVERID_UPD64083,
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.attach_adapter = upd64083_probe,
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.detach_client = upd64083_detach,
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.command = upd64083_command,
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};
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static int __init upd64083_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 upd64083_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(upd64083_init_module);
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module_exit(upd64083_exit_module);
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