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V4L/DVB (5304): Improve chip matching in v4l2_register

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The chip matching in struct v4l2_register for VIDIOC_DBG_G/S_REGISTER 
was rather primitive. It could not be extended to other busses besides 
i2c and it lacked a way to.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans Verkuil 2007-02-23 20:55:14 -03:00 committed by Mauro Carvalho Chehab
parent d55c7aec66
commit f3d092b84a
14 changed files with 70 additions and 21 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/media/video/cx25840/cx25840-core.c
View file

@ -633,7 +633,7 @@ static int cx25840_command(struct i2c_client *client, unsigned int cmd,
{
struct v4l2_register *reg = arg;
if (reg->i2c_id != I2C_DRIVERID_CX25840)
if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;

4
drivers/media/video/cx88/cx88-video.c
View file

@ -1389,7 +1389,7 @@ static int vidioc_g_register (struct file *file, void *fh,
{
struct cx88_core *core = ((struct cx8800_fh*)fh)->dev->core;
if (reg->i2c_id != 0)
if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
return -EINVAL;
/* cx2388x has a 24-bit register space */
reg->val = cx_read(reg->reg&0xffffff);
@ -1401,7 +1401,7 @@ static int vidioc_s_register (struct file *file, void *fh,
{
struct cx88_core *core = ((struct cx8800_fh*)fh)->dev->core;
if (reg->i2c_id != 0)
if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
return -EINVAL;
cx_write(reg->reg&0xffffff, reg->val);
return 0;

11
drivers/media/video/pvrusb2/pvrusb2-hdw.c
View file

@ -3256,8 +3256,8 @@ static int pvr2_hdw_get_eeprom_addr(struct pvr2_hdw *hdw)
int pvr2_hdw_register_access(struct pvr2_hdw *hdw,
u32 chip_id, u64 reg_id,
int setFl,u32 *val_ptr)
u32 match_type, u32 match_chip, u64 reg_id,
int setFl,u64 *val_ptr)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
struct list_head *item;
@ -3268,13 +3268,16 @@ int pvr2_hdw_register_access(struct pvr2_hdw *hdw,
if (!capable(CAP_SYS_ADMIN)) return -EPERM;
req.i2c_id = chip_id;
req.match_type = match_type;
req.match_chip = match_chip;
req.reg = reg_id;
if (setFl) req.val = *val_ptr;
mutex_lock(&hdw->i2c_list_lock); do {
list_for_each(item,&hdw->i2c_clients) {
cp = list_entry(item,struct pvr2_i2c_client,list);
if (cp->client->driver->id != chip_id) continue;
if (!v4l2_chip_match_i2c_client(cp->client, req.match_type, req.match_chip)) {
continue;
}
stat = pvr2_i2c_client_cmd(
cp,(setFl ? VIDIOC_DBG_S_REGISTER :
VIDIOC_DBG_G_REGISTER),&req);

7
drivers/media/video/pvrusb2/pvrusb2-hdw.h
View file

@ -217,13 +217,14 @@ void pvr2_hdw_v4l_store_minor_number(struct pvr2_hdw *,
enum pvr2_v4l_type index,int);
/* Direct read/write access to chip's registers:
chip_id - unique id of chip (e.g. I2C_DRIVERD_xxxx)
match_type - how to interpret match_chip (e.g. driver ID, i2c address)
match_chip - chip match value (e.g. I2C_DRIVERD_xxxx)
reg_id - register number to access
setFl - true to set the register, false to read it
val_ptr - storage location for source / result. */
int pvr2_hdw_register_access(struct pvr2_hdw *,
u32 chip_id,u64 reg_id,
int setFl,u32 *val_ptr);
u32 match_type, u32 match_chip,u64 reg_id,
int setFl,u64 *val_ptr);
/* The following entry points are all lower level things you normally don't
want to worry about. */

4
drivers/media/video/pvrusb2/pvrusb2-v4l2.c
View file

@ -740,11 +740,11 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
case VIDIOC_DBG_S_REGISTER:
case VIDIOC_DBG_G_REGISTER:
{
u32 val;
u64 val;
struct v4l2_register *req = (struct v4l2_register *)arg;
if (cmd == VIDIOC_DBG_S_REGISTER) val = req->val;
ret = pvr2_hdw_register_access(
hdw,req->i2c_id,req->reg,
hdw,req->match_type,req->match_chip,req->reg,
cmd == VIDIOC_DBG_S_REGISTER,&val);
if (cmd == VIDIOC_DBG_G_REGISTER) req->val = val;
break;

2
drivers/media/video/saa7115.c
View file

@ -1425,7 +1425,7 @@ static int saa711x_command(struct i2c_client *client, unsigned int cmd, void *ar
{
struct v4l2_register *reg = arg;
if (reg->i2c_id != I2C_DRIVERID_SAA711X)
if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;

2
drivers/media/video/saa7127.c
View file

@ -619,7 +619,7 @@ static int saa7127_command(struct i2c_client *client,
{
struct v4l2_register *reg = arg;
if (reg->i2c_id != I2C_DRIVERID_SAA7127)
if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;

2
drivers/media/video/tvp5150.c
View file

@ -955,7 +955,7 @@ static int tvp5150_command(struct i2c_client *c,
{
struct v4l2_register *reg = arg;
if (reg->i2c_id != I2C_DRIVERID_TVP5150)
if (!v4l2_chip_match_i2c_client(c, reg->match_type, reg->match_chip))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;

2
drivers/media/video/upd64031a.c
View file

@ -167,7 +167,7 @@ static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *
{
struct v4l2_register *reg = arg;
if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;

2
drivers/media/video/upd64083.c
View file

@ -144,7 +144,7 @@ static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *a
{
struct v4l2_register *reg = arg;
if (reg->i2c_id != I2C_DRIVERID_UPD64083)
if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;

4
drivers/media/video/usbvision/usbvision-video.c
View file

@ -521,7 +521,7 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
struct v4l2_register *reg = arg;
int errCode;
if (reg->i2c_id != 0)
if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@ -540,7 +540,7 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
PDEBUG(DBG_IOCTL, "VIDIOC_DBG_%c_REGISTER reg=0x%02X, value=0x%02X",
cmd == VIDIOC_DBG_G_REGISTER ? 'G' : 'S',
(unsigned int)reg->reg, reg->val);
(unsigned int)reg->reg, (unsigned int)reg->val);
return 0;
}
#endif

30
drivers/media/video/v4l2-common.c
View file

@ -51,6 +51,7 @@
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/pgtable.h>
@ -947,6 +948,32 @@ u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id)
return **ctrl_classes;
}
int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 match_type, u32 match_chip)
{
switch (match_type) {
case V4L2_CHIP_MATCH_ALWAYS:
return 1;
case V4L2_CHIP_MATCH_I2C_DRIVER:
return (c != NULL && c->driver != NULL && c->driver->id == match_chip);
case V4L2_CHIP_MATCH_I2C_ADDR:
return (c != NULL && c->addr == match_chip);
default:
return 0;
}
}
int v4l2_chip_match_host(u32 match_type, u32 match_chip)
{
switch (match_type) {
case V4L2_CHIP_MATCH_ALWAYS:
return 1;
case V4L2_CHIP_MATCH_HOST:
return match_chip == 0;
default:
return 0;
}
}
/* ----------------------------------------------------------------- */
EXPORT_SYMBOL(v4l2_norm_to_name);
@ -970,6 +997,9 @@ EXPORT_SYMBOL(v4l2_ctrl_query_menu);
EXPORT_SYMBOL(v4l2_ctrl_query_fill);
EXPORT_SYMBOL(v4l2_ctrl_query_fill_std);
EXPORT_SYMBOL(v4l2_chip_match_i2c_client);
EXPORT_SYMBOL(v4l2_chip_match_host);
/*
* Local variables:
* c-basic-offset: 8

11
include/linux/videodev2.h
View file

@ -1306,10 +1306,17 @@ struct v4l2_streamparm
*/
/* VIDIOC_DBG_G_REGISTER and VIDIOC_DBG_S_REGISTER */
#define V4L2_CHIP_MATCH_ALWAYS 0 /* Match always (match_chip is not used) */
#define V4L2_CHIP_MATCH_HOST 1 /* Match against chip ID on host (0 for the host) */
#define V4L2_CHIP_MATCH_I2C_DRIVER 2 /* Match against I2C driver ID */
#define V4L2_CHIP_MATCH_I2C_ADDR 3 /* Match against I2C 7-bit address */
struct v4l2_register {
__u32 match_type; /* Match type */
__u32 match_chip; /* Match this chip, meaning determined by match_type */
__u64 reg;
__u32 i2c_id; /* I2C driver ID of the I2C chip, or 0 for the host */
__u32 val;
__u64 val;
};
/*

8
include/media/v4l2-common.h
View file

@ -94,6 +94,14 @@ u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id);
/* ------------------------------------------------------------------------- */
/* Register/chip ident helper function */
struct i2c_client; /* forward reference */
int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 id_type, u32 chip_id);
int v4l2_chip_match_host(u32 id_type, u32 chip_id);
/* ------------------------------------------------------------------------- */
/* Internal ioctls */
/* VIDIOC_INT_DECODE_VBI_LINE */