aecde8b53b
Since the i2c driver ID will be removed in the near future we have to modify the v4l2 debugging API to use the driver name instead of driver ID. Note that this API is not used in applications other than v4l2-dbg.cpp as it is for debugging and testing only. Should anyone use the old VIDIOC_G_CHIP_IDENT, then this will be logged with a warning that it is deprecated and will be removed in 2.6.30. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
248 lines
6.7 KiB
C
248 lines
6.7 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
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* 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-device.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-i2c-drv.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;
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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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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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struct v4l2_subdev sd;
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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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static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct upd64083_state, sd);
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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_write(struct v4l2_subdev *sd, u8 reg, u8 val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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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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v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
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if (i2c_master_send(client, buf, 2) != 2)
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v4l2_err(sd, "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 v4l2_subdev *sd, u8 reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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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_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
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{
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struct upd64083_state *state = to_state(sd);
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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(sd, R00, r00);
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upd64083_write(sd, R02, r02);
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return 0;
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}
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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if (!v4l2_chip_match_i2c_client(client, ®->match))
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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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reg->val = upd64083_read(sd, reg->reg & 0xff);
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reg->size = 1;
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return 0;
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}
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static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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if (!v4l2_chip_match_i2c_client(client, ®->match))
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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(sd, reg->reg & 0xff, reg->val & 0xff);
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return 0;
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}
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#endif
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static int upd64083_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0);
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}
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static int upd64083_log_status(struct v4l2_subdev *sd)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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u8 buf[7];
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i2c_master_recv(client, buf, 7);
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v4l2_info(sd, "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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return 0;
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}
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static int upd64083_command(struct i2c_client *client, unsigned cmd, void *arg)
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{
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return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_core_ops upd64083_core_ops = {
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.log_status = upd64083_log_status,
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.g_chip_ident = upd64083_g_chip_ident,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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.g_register = upd64083_g_register,
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.s_register = upd64083_s_register,
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#endif
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};
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static const struct v4l2_subdev_video_ops upd64083_video_ops = {
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.s_routing = upd64083_s_routing,
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};
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static const struct v4l2_subdev_ops upd64083_ops = {
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.core = &upd64083_core_ops,
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.video = &upd64083_video_ops,
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};
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/* ------------------------------------------------------------------------ */
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/* i2c implementation */
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static int upd64083_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct upd64083_state *state;
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struct v4l2_subdev *sd;
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int i;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->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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return -ENOMEM;
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sd = &state->sd;
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v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
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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(sd, i, state->regs[i]);
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return 0;
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}
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static int upd64083_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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v4l2_device_unregister_subdev(sd);
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kfree(to_state(sd));
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct i2c_device_id upd64083_id[] = {
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{ "upd64083", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, upd64083_id);
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static struct v4l2_i2c_driver_data v4l2_i2c_data = {
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.name = "upd64083",
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.driverid = I2C_DRIVERID_UPD64083,
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.command = upd64083_command,
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.probe = upd64083_probe,
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.remove = upd64083_remove,
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.id_table = upd64083_id,
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};
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