From f3d092b84a855c44914fea0648695bef7d751266 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 23 Feb 2007 20:55:14 -0300 Subject: [PATCH] V4L/DVB (5304): Improve chip matching in v4l2_register 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx25840/cx25840-core.c | 2 +- drivers/media/video/cx88/cx88-video.c | 4 +-- drivers/media/video/pvrusb2/pvrusb2-hdw.c | 11 ++++--- drivers/media/video/pvrusb2/pvrusb2-hdw.h | 7 +++-- drivers/media/video/pvrusb2/pvrusb2-v4l2.c | 4 +-- drivers/media/video/saa7115.c | 2 +- drivers/media/video/saa7127.c | 2 +- drivers/media/video/tvp5150.c | 2 +- drivers/media/video/upd64031a.c | 2 +- drivers/media/video/upd64083.c | 2 +- .../media/video/usbvision/usbvision-video.c | 4 +-- drivers/media/video/v4l2-common.c | 30 +++++++++++++++++++ include/linux/videodev2.h | 11 +++++-- include/media/v4l2-common.h | 8 +++++ 14 files changed, 70 insertions(+), 21 deletions(-) diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c index 3ff5fc00c09d..774d2536555b 100644 --- a/drivers/media/video/cx25840/cx25840-core.c +++ b/drivers/media/video/cx25840/cx25840-core.c @@ -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; diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c index a97be1bdc31d..bdfe2af70124 100644 --- a/drivers/media/video/cx88/cx88-video.c +++ b/drivers/media/video/cx88/cx88-video.c @@ -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; diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c index a1ca0f5007e0..1cd4bb3ae260 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c +++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c @@ -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); diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.h b/drivers/media/video/pvrusb2/pvrusb2-hdw.h index 566a8ef7e121..0c9cca43ff85 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-hdw.h +++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.h @@ -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. */ diff --git a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c index 4fe4136204c7..5313d342666e 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c +++ b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c @@ -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; diff --git a/drivers/media/video/saa7115.c b/drivers/media/video/saa7115.c index c4f066d6668e..7735b6758921 100644 --- a/drivers/media/video/saa7115.c +++ b/drivers/media/video/saa7115.c @@ -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; diff --git a/drivers/media/video/saa7127.c b/drivers/media/video/saa7127.c index bd9c4f3ad02e..654863db1591 100644 --- a/drivers/media/video/saa7127.c +++ b/drivers/media/video/saa7127.c @@ -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; diff --git a/drivers/media/video/tvp5150.c b/drivers/media/video/tvp5150.c index 886b5df7c9d1..d5ec05f56adf 100644 --- a/drivers/media/video/tvp5150.c +++ b/drivers/media/video/tvp5150.c @@ -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; diff --git a/drivers/media/video/upd64031a.c b/drivers/media/video/upd64031a.c index b3b5fd536dc3..28d1133a3b7a 100644 --- a/drivers/media/video/upd64031a.c +++ b/drivers/media/video/upd64031a.c @@ -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; diff --git a/drivers/media/video/upd64083.c b/drivers/media/video/upd64083.c index 8852903e7a92..fe38224150d8 100644 --- a/drivers/media/video/upd64083.c +++ b/drivers/media/video/upd64083.c @@ -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; diff --git a/drivers/media/video/usbvision/usbvision-video.c b/drivers/media/video/usbvision/usbvision-video.c index ae5f42562c0c..6fc14557d623 100644 --- a/drivers/media/video/usbvision/usbvision-video.c +++ b/drivers/media/video/usbvision/usbvision-video.c @@ -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 diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c index ddfd80c5618b..3506cb667111 100644 --- a/drivers/media/video/v4l2-common.c +++ b/drivers/media/video/v4l2-common.c @@ -51,6 +51,7 @@ #include #include #include +#include #include #include #include @@ -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 diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h index 65a165f918c9..e3ab047f90ef 100644 --- a/include/linux/videodev2.h +++ b/include/linux/videodev2.h @@ -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; }; /* diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index 244e440edb53..6eaeec98ed89 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -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 */ -- 2.20.1