![Wolfram Sang](/assets/img/avatar_default.png)
I2C drivers can use the clientdata-pointer to point to private data. As I2C
devices are not really unregistered, but merely detached from their driver, it
used to be the drivers obligation to clear this pointer during remove() or a
failed probe(). As a couple of drivers forgot to do this, it was agreed that it
was cleaner if the i2c-core does this clearance when appropriate, as there is
no guarantee for the lifetime of the clientdata-pointer after remove() anyhow.
This feature was added to the core with commit
e4a7b9b04d
to fix the faulty drivers.
As there is no need anymore to clear the clientdata-pointer, remove all current
occurrences in the drivers to simplify the code and prevent confusion.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Richard Purdie <rpurdie@linux.intel.com>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
469 lines
9.6 KiB
C
469 lines
9.6 KiB
C
/*
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* Copyright (C) 2005-2006 Micronas USA Inc.
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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 (Version 2) as
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* published by the Free Software Foundation.
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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 Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <linux/ioctl.h>
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#include <linux/slab.h>
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#include "wis-i2c.h"
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struct wis_saa7115 {
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int norm;
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int brightness;
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int contrast;
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int saturation;
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int hue;
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};
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static u8 initial_registers[] =
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{
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0x01, 0x08,
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0x02, 0xc0,
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0x03, 0x20,
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0x04, 0x80,
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0x05, 0x80,
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0x06, 0xeb,
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0x07, 0xe0,
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0x08, 0xf0, /* always toggle FID */
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0x09, 0x40,
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0x0a, 0x80,
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0x0b, 0x40,
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0x0c, 0x40,
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0x0d, 0x00,
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0x0e, 0x03,
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0x0f, 0x2a,
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0x10, 0x0e,
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0x11, 0x00,
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0x12, 0x8d,
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0x13, 0x00,
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0x14, 0x00,
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0x15, 0x11,
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0x16, 0x01,
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0x17, 0xda,
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0x18, 0x40,
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0x19, 0x80,
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0x1a, 0x00,
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0x1b, 0x42,
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0x1c, 0xa9,
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0x30, 0x66,
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0x31, 0x90,
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0x32, 0x01,
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0x34, 0x00,
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0x35, 0x00,
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0x36, 0x20,
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0x38, 0x03,
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0x39, 0x20,
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0x3a, 0x88,
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0x40, 0x00,
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0x41, 0xff,
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0x42, 0xff,
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0x43, 0xff,
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0x44, 0xff,
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0x45, 0xff,
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0x46, 0xff,
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0x47, 0xff,
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0x48, 0xff,
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0x49, 0xff,
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0x4a, 0xff,
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0x4b, 0xff,
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0x4c, 0xff,
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0x4d, 0xff,
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0x4e, 0xff,
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0x4f, 0xff,
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0x50, 0xff,
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0x51, 0xff,
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0x52, 0xff,
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0x53, 0xff,
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0x54, 0xf4 /*0xff*/,
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0x55, 0xff,
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0x56, 0xff,
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0x57, 0xff,
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0x58, 0x40,
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0x59, 0x47,
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0x5a, 0x06 /*0x03*/,
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0x5b, 0x83,
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0x5d, 0x06,
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0x5e, 0x00,
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0x80, 0x30, /* window defined scaler operation, task A and B enabled */
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0x81, 0x03, /* use scaler datapath generated V */
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0x83, 0x00,
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0x84, 0x00,
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0x85, 0x00,
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0x86, 0x45,
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0x87, 0x31,
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0x88, 0xc0,
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0x90, 0x02, /* task A process top field */
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0x91, 0x08,
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0x92, 0x09,
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0x93, 0x80,
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0x94, 0x06,
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0x95, 0x00,
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0x96, 0xc0,
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0x97, 0x02,
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0x98, 0x12,
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0x99, 0x00,
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0x9a, 0xf2,
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0x9b, 0x00,
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0x9c, 0xd0,
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0x9d, 0x02,
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0x9e, 0xf2,
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0x9f, 0x00,
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0xa0, 0x01,
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0xa1, 0x01,
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0xa2, 0x01,
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0xa4, 0x80,
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0xa5, 0x40,
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0xa6, 0x40,
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0xa8, 0x00,
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0xa9, 0x04,
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0xaa, 0x00,
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0xac, 0x00,
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0xad, 0x02,
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0xae, 0x00,
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0xb0, 0x00,
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0xb1, 0x04,
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0xb2, 0x00,
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0xb3, 0x04,
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0xb4, 0x00,
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0xb8, 0x00,
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0xbc, 0x00,
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0xc0, 0x03, /* task B process bottom field */
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0xc1, 0x08,
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0xc2, 0x09,
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0xc3, 0x80,
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0xc4, 0x06,
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0xc5, 0x00,
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0xc6, 0xc0,
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0xc7, 0x02,
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0xc8, 0x12,
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0xc9, 0x00,
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0xca, 0xf2,
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0xcb, 0x00,
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0xcc, 0xd0,
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0xcd, 0x02,
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0xce, 0xf2,
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0xcf, 0x00,
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0xd0, 0x01,
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0xd1, 0x01,
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0xd2, 0x01,
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0xd4, 0x80,
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0xd5, 0x40,
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0xd6, 0x40,
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0xd8, 0x00,
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0xd9, 0x04,
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0xda, 0x00,
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0xdc, 0x00,
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0xdd, 0x02,
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0xde, 0x00,
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0xe0, 0x00,
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0xe1, 0x04,
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0xe2, 0x00,
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0xe3, 0x04,
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0xe4, 0x00,
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0xe8, 0x00,
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0x88, 0xf0, /* End of original static list */
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0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
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};
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static int write_reg(struct i2c_client *client, u8 reg, u8 value)
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{
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static int write_regs(struct i2c_client *client, u8 *regs)
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{
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int i;
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for (i = 0; regs[i] != 0x00; i += 2)
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if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0)
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return -1;
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return 0;
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}
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static int wis_saa7115_command(struct i2c_client *client,
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unsigned int cmd, void *arg)
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{
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struct wis_saa7115 *dec = i2c_get_clientdata(client);
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switch (cmd) {
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case VIDIOC_S_INPUT:
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{
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int *input = arg;
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i2c_smbus_write_byte_data(client, 0x02, 0xC0 | *input);
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i2c_smbus_write_byte_data(client, 0x09,
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*input < 6 ? 0x40 : 0xC0);
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break;
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}
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case DECODER_SET_RESOLUTION:
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{
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struct video_decoder_resolution *res = arg;
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/* Course-grained scaler */
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int h_integer_scaler = res->width < 704 ? 704 / res->width : 1;
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/* Fine-grained scaler to take care of remainder */
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int h_scaling_increment = (704 / h_integer_scaler) *
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1024 / res->width;
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/* Fine-grained scaler only */
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int v_scaling_increment = (dec->norm & V4L2_STD_NTSC ?
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240 : 288) * 1024 / res->height;
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u8 regs[] = {
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0x88, 0xc0,
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0x9c, res->width & 0xff,
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0x9d, res->width >> 8,
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0x9e, res->height & 0xff,
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0x9f, res->height >> 8,
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0xa0, h_integer_scaler,
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0xa1, 1,
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0xa2, 1,
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0xa8, h_scaling_increment & 0xff,
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0xa9, h_scaling_increment >> 8,
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0xac, (h_scaling_increment / 2) & 0xff,
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0xad, (h_scaling_increment / 2) >> 8,
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0xb0, v_scaling_increment & 0xff,
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0xb1, v_scaling_increment >> 8,
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0xb2, v_scaling_increment & 0xff,
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0xb3, v_scaling_increment >> 8,
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0xcc, res->width & 0xff,
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0xcd, res->width >> 8,
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0xce, res->height & 0xff,
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0xcf, res->height >> 8,
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0xd0, h_integer_scaler,
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0xd1, 1,
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0xd2, 1,
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0xd8, h_scaling_increment & 0xff,
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0xd9, h_scaling_increment >> 8,
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0xdc, (h_scaling_increment / 2) & 0xff,
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0xdd, (h_scaling_increment / 2) >> 8,
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0xe0, v_scaling_increment & 0xff,
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0xe1, v_scaling_increment >> 8,
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0xe2, v_scaling_increment & 0xff,
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0xe3, v_scaling_increment >> 8,
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0x88, 0xf0,
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0, 0,
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};
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write_regs(client, regs);
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break;
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}
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case VIDIOC_S_STD:
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{
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v4l2_std_id *input = arg;
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u8 regs[] = {
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0x88, 0xc0,
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0x98, *input & V4L2_STD_NTSC ? 0x12 : 0x16,
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0x9a, *input & V4L2_STD_NTSC ? 0xf2 : 0x20,
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0x9b, *input & V4L2_STD_NTSC ? 0x00 : 0x01,
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0xc8, *input & V4L2_STD_NTSC ? 0x12 : 0x16,
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0xca, *input & V4L2_STD_NTSC ? 0xf2 : 0x20,
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0xcb, *input & V4L2_STD_NTSC ? 0x00 : 0x01,
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0x88, 0xf0,
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0x30, *input & V4L2_STD_NTSC ? 0x66 : 0x00,
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0x31, *input & V4L2_STD_NTSC ? 0x90 : 0xe0,
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0, 0,
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};
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write_regs(client, regs);
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dec->norm = *input;
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break;
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}
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case VIDIOC_QUERYCTRL:
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{
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struct v4l2_queryctrl *ctrl = arg;
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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ctrl->type = V4L2_CTRL_TYPE_INTEGER;
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strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
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ctrl->minimum = 0;
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ctrl->maximum = 255;
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ctrl->step = 1;
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ctrl->default_value = 128;
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ctrl->flags = 0;
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break;
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case V4L2_CID_CONTRAST:
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ctrl->type = V4L2_CTRL_TYPE_INTEGER;
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strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
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ctrl->minimum = 0;
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ctrl->maximum = 127;
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ctrl->step = 1;
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ctrl->default_value = 64;
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ctrl->flags = 0;
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break;
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case V4L2_CID_SATURATION:
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ctrl->type = V4L2_CTRL_TYPE_INTEGER;
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strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
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ctrl->minimum = 0;
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ctrl->maximum = 127;
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ctrl->step = 1;
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ctrl->default_value = 64;
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ctrl->flags = 0;
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break;
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case V4L2_CID_HUE:
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ctrl->type = V4L2_CTRL_TYPE_INTEGER;
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strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
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ctrl->minimum = -128;
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ctrl->maximum = 127;
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ctrl->step = 1;
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ctrl->default_value = 0;
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ctrl->flags = 0;
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break;
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}
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break;
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}
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case VIDIOC_S_CTRL:
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{
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struct v4l2_control *ctrl = arg;
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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if (ctrl->value > 255)
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dec->brightness = 255;
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else if (ctrl->value < 0)
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dec->brightness = 0;
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else
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dec->brightness = ctrl->value;
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write_reg(client, 0x0a, dec->brightness);
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break;
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case V4L2_CID_CONTRAST:
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if (ctrl->value > 127)
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dec->contrast = 127;
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else if (ctrl->value < 0)
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dec->contrast = 0;
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else
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dec->contrast = ctrl->value;
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write_reg(client, 0x0b, dec->contrast);
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break;
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case V4L2_CID_SATURATION:
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if (ctrl->value > 127)
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dec->saturation = 127;
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else if (ctrl->value < 0)
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dec->saturation = 0;
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else
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dec->saturation = ctrl->value;
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write_reg(client, 0x0c, dec->saturation);
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break;
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case V4L2_CID_HUE:
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if (ctrl->value > 127)
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dec->hue = 127;
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else if (ctrl->value < -128)
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dec->hue = -128;
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else
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dec->hue = ctrl->value;
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write_reg(client, 0x0d, dec->hue);
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break;
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}
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break;
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}
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case VIDIOC_G_CTRL:
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{
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struct v4l2_control *ctrl = arg;
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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ctrl->value = dec->brightness;
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break;
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case V4L2_CID_CONTRAST:
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ctrl->value = dec->contrast;
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break;
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case V4L2_CID_SATURATION:
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ctrl->value = dec->saturation;
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break;
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case V4L2_CID_HUE:
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ctrl->value = dec->hue;
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break;
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}
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break;
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}
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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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static int wis_saa7115_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct i2c_adapter *adapter = client->adapter;
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struct wis_saa7115 *dec;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -ENODEV;
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dec = kmalloc(sizeof(struct wis_saa7115), GFP_KERNEL);
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if (dec == NULL)
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return -ENOMEM;
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dec->norm = V4L2_STD_NTSC;
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dec->brightness = 128;
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dec->contrast = 64;
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dec->saturation = 64;
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dec->hue = 0;
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i2c_set_clientdata(client, dec);
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printk(KERN_DEBUG
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"wis-saa7115: initializing SAA7115 at address %d on %s\n",
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client->addr, adapter->name);
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if (write_regs(client, initial_registers) < 0) {
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printk(KERN_ERR
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"wis-saa7115: error initializing SAA7115\n");
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kfree(dec);
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return -ENODEV;
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}
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return 0;
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}
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static int wis_saa7115_remove(struct i2c_client *client)
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{
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struct wis_saa7115 *dec = i2c_get_clientdata(client);
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kfree(dec);
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return 0;
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}
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static const struct i2c_device_id wis_saa7115_id[] = {
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{ "wis_saa7115", 0 },
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{ }
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};
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static struct i2c_driver wis_saa7115_driver = {
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.driver = {
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.name = "WIS SAA7115 I2C driver",
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},
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.probe = wis_saa7115_probe,
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.remove = wis_saa7115_remove,
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.command = wis_saa7115_command,
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.id_table = wis_saa7115_id,
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};
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static int __init wis_saa7115_init(void)
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{
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return i2c_add_driver(&wis_saa7115_driver);
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}
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static void __exit wis_saa7115_cleanup(void)
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{
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i2c_del_driver(&wis_saa7115_driver);
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}
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module_init(wis_saa7115_init);
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module_exit(wis_saa7115_cleanup);
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MODULE_LICENSE("GPL v2");
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