diff options
Diffstat (limited to 'drivers/media/video/v4l2-ioctl.c')
| -rw-r--r-- | drivers/media/video/v4l2-ioctl.c | 1875 |
1 files changed, 1875 insertions, 0 deletions
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c new file mode 100644 index 000000000000..fdfe7739c96e --- /dev/null +++ b/drivers/media/video/v4l2-ioctl.c @@ -0,0 +1,1875 @@ +/* + * Video capture interface for Linux version 2 + * + * A generic framework to process V4L2 ioctl commands. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Authors: Alan Cox, <alan@redhat.com> (version 1) + * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2) + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> + +#define __OLD_VIDIOC_ /* To allow fixing old calls */ +#include <linux/videodev2.h> + +#ifdef CONFIG_VIDEO_V4L1 +#include <linux/videodev.h> +#endif +#include <media/v4l2-common.h> +#include <media/v4l2-ioctl.h> +#include <linux/video_decoder.h> + +#define dbgarg(cmd, fmt, arg...) \ + do { \ + if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) { \ + printk(KERN_DEBUG "%s: ", vfd->name); \ + v4l_printk_ioctl(cmd); \ + printk(" " fmt, ## arg); \ + } \ + } while (0) + +#define dbgarg2(fmt, arg...) \ + do { \ + if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \ + printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\ + } while (0) + +struct std_descr { + v4l2_std_id std; + const char *descr; +}; + +static const struct std_descr standards[] = { + { V4L2_STD_NTSC, "NTSC" }, + { V4L2_STD_NTSC_M, "NTSC-M" }, + { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, + { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, + { V4L2_STD_NTSC_443, "NTSC-443" }, + { V4L2_STD_PAL, "PAL" }, + { V4L2_STD_PAL_BG, "PAL-BG" }, + { V4L2_STD_PAL_B, "PAL-B" }, + { V4L2_STD_PAL_B1, "PAL-B1" }, + { V4L2_STD_PAL_G, "PAL-G" }, + { V4L2_STD_PAL_H, "PAL-H" }, + { V4L2_STD_PAL_I, "PAL-I" }, + { V4L2_STD_PAL_DK, "PAL-DK" }, + { V4L2_STD_PAL_D, "PAL-D" }, + { V4L2_STD_PAL_D1, "PAL-D1" }, + { V4L2_STD_PAL_K, "PAL-K" }, + { V4L2_STD_PAL_M, "PAL-M" }, + { V4L2_STD_PAL_N, "PAL-N" }, + { V4L2_STD_PAL_Nc, "PAL-Nc" }, + { V4L2_STD_PAL_60, "PAL-60" }, + { V4L2_STD_SECAM, "SECAM" }, + { V4L2_STD_SECAM_B, "SECAM-B" }, + { V4L2_STD_SECAM_G, "SECAM-G" }, + { V4L2_STD_SECAM_H, "SECAM-H" }, + { V4L2_STD_SECAM_DK, "SECAM-DK" }, + { V4L2_STD_SECAM_D, "SECAM-D" }, + { V4L2_STD_SECAM_K, "SECAM-K" }, + { V4L2_STD_SECAM_K1, "SECAM-K1" }, + { V4L2_STD_SECAM_L, "SECAM-L" }, + { V4L2_STD_SECAM_LC, "SECAM-Lc" }, + { 0, "Unknown" } +}; + +/* video4linux standard ID conversion to standard name + */ +const char *v4l2_norm_to_name(v4l2_std_id id) +{ + u32 myid = id; + int i; + + /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle + 64 bit comparations. So, on that architecture, with some gcc + variants, compilation fails. Currently, the max value is 30bit wide. + */ + BUG_ON(myid != id); + + for (i = 0; standards[i].std; i++) + if (myid == standards[i].std) + break; + return standards[i].descr; +} +EXPORT_SYMBOL(v4l2_norm_to_name); + +/* Fill in the fields of a v4l2_standard structure according to the + 'id' and 'transmission' parameters. Returns negative on error. */ +int v4l2_video_std_construct(struct v4l2_standard *vs, + int id, const char *name) +{ + u32 index = vs->index; + + memset(vs, 0, sizeof(struct v4l2_standard)); + vs->index = index; + vs->id = id; + if (id & V4L2_STD_525_60) { + vs->frameperiod.numerator = 1001; + vs->frameperiod.denominator = 30000; + vs->framelines = 525; + } else { + vs->frameperiod.numerator = 1; + vs->frameperiod.denominator = 25; + vs->framelines = 625; + } + strlcpy(vs->name, name, sizeof(vs->name)); + return 0; +} +EXPORT_SYMBOL(v4l2_video_std_construct); + +/* ----------------------------------------------------------------- */ +/* some arrays for pretty-printing debug messages of enum types */ + +const char *v4l2_field_names[] = { + [V4L2_FIELD_ANY] = "any", + [V4L2_FIELD_NONE] = "none", + [V4L2_FIELD_TOP] = "top", + [V4L2_FIELD_BOTTOM] = "bottom", + [V4L2_FIELD_INTERLACED] = "interlaced", + [V4L2_FIELD_SEQ_TB] = "seq-tb", + [V4L2_FIELD_SEQ_BT] = "seq-bt", + [V4L2_FIELD_ALTERNATE] = "alternate", + [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", + [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", +}; +EXPORT_SYMBOL(v4l2_field_names); + +const char *v4l2_type_names[] = { + [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", + [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", + [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", + [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", + [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", + [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", + [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", + [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", +}; +EXPORT_SYMBOL(v4l2_type_names); + +static const char *v4l2_memory_names[] = { + [V4L2_MEMORY_MMAP] = "mmap", + [V4L2_MEMORY_USERPTR] = "userptr", + [V4L2_MEMORY_OVERLAY] = "overlay", +}; + +#define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \ + arr[a] : "unknown") + +/* ------------------------------------------------------------------ */ +/* debug help functions */ + +#ifdef CONFIG_VIDEO_V4L1_COMPAT +static const char *v4l1_ioctls[] = { + [_IOC_NR(VIDIOCGCAP)] = "VIDIOCGCAP", + [_IOC_NR(VIDIOCGCHAN)] = "VIDIOCGCHAN", + [_IOC_NR(VIDIOCSCHAN)] = "VIDIOCSCHAN", + [_IOC_NR(VIDIOCGTUNER)] = "VIDIOCGTUNER", + [_IOC_NR(VIDIOCSTUNER)] = "VIDIOCSTUNER", + [_IOC_NR(VIDIOCGPICT)] = "VIDIOCGPICT", + [_IOC_NR(VIDIOCSPICT)] = "VIDIOCSPICT", + [_IOC_NR(VIDIOCCAPTURE)] = "VIDIOCCAPTURE", + [_IOC_NR(VIDIOCGWIN)] = "VIDIOCGWIN", + [_IOC_NR(VIDIOCSWIN)] = "VIDIOCSWIN", + [_IOC_NR(VIDIOCGFBUF)] = "VIDIOCGFBUF", + [_IOC_NR(VIDIOCSFBUF)] = "VIDIOCSFBUF", + [_IOC_NR(VIDIOCKEY)] = "VIDIOCKEY", + [_IOC_NR(VIDIOCGFREQ)] = "VIDIOCGFREQ", + [_IOC_NR(VIDIOCSFREQ)] = "VIDIOCSFREQ", + [_IOC_NR(VIDIOCGAUDIO)] = "VIDIOCGAUDIO", + [_IOC_NR(VIDIOCSAUDIO)] = "VIDIOCSAUDIO", + [_IOC_NR(VIDIOCSYNC)] = "VIDIOCSYNC", + [_IOC_NR(VIDIOCMCAPTURE)] = "VIDIOCMCAPTURE", + [_IOC_NR(VIDIOCGMBUF)] = "VIDIOCGMBUF", + [_IOC_NR(VIDIOCGUNIT)] = "VIDIOCGUNIT", + [_IOC_NR(VIDIOCGCAPTURE)] = "VIDIOCGCAPTURE", + [_IOC_NR(VIDIOCSCAPTURE)] = "VIDIOCSCAPTURE", + [_IOC_NR(VIDIOCSPLAYMODE)] = "VIDIOCSPLAYMODE", + [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE", + [_IOC_NR(VIDIOCGPLAYINFO)] = "VIDIOCGPLAYINFO", + [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE", + [_IOC_NR(VIDIOCGVBIFMT)] = "VIDIOCGVBIFMT", + [_IOC_NR(VIDIOCSVBIFMT)] = "VIDIOCSVBIFMT" +}; +#define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls) +#endif + +static const char *v4l2_ioctls[] = { + [_IOC_NR(VIDIOC_QUERYCAP)] = "VIDIOC_QUERYCAP", + [_IOC_NR(VIDIOC_RESERVED)] = "VIDIOC_RESERVED", + [_IOC_NR(VIDIOC_ENUM_FMT)] = "VIDIOC_ENUM_FMT", + [_IOC_NR(VIDIOC_G_FMT)] = "VIDIOC_G_FMT", + [_IOC_NR(VIDIOC_S_FMT)] = "VIDIOC_S_FMT", + [_IOC_NR(VIDIOC_REQBUFS)] = "VIDIOC_REQBUFS", + [_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF", + [_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF", + [_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF", + [_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY", + [_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF", + [_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF", + [_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON", + [_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF", + [_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM", + [_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM", + [_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD", + [_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD", + [_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD", + [_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT", + [_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL", + [_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL", + [_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER", + [_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER", + [_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO", + [_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO", + [_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL", + [_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU", + [_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT", + [_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT", + [_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT", + [_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT", + [_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT", + [_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT", + [_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT", + [_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR", + [_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR", + [_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY", + [_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY", + [_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP", + [_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP", + [_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP", + [_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP", + [_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP", + [_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD", + [_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT", + [_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO", + [_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT", + [_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY", + [_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY", + [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP", + [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS", + [_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS", + [_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS", + [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS", +#if 1 + [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES", + [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS", + [_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX", + [_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD", + [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD", + + [_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER", + [_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER", + + [_IOC_NR(VIDIOC_G_CHIP_IDENT)] = "VIDIOC_G_CHIP_IDENT", + [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)] = "VIDIOC_S_HW_FREQ_SEEK", +#endif +}; +#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) + +static const char *v4l2_int_ioctls[] = { +#ifdef CONFIG_VIDEO_V4L1_COMPAT + [_IOC_NR(DECODER_GET_CAPABILITIES)] = "DECODER_GET_CAPABILITIES", + [_IOC_NR(DECODER_GET_STATUS)] = "DECODER_GET_STATUS", + [_IOC_NR(DECODER_SET_NORM)] = "DECODER_SET_NORM", + [_IOC_NR(DECODER_SET_INPUT)] = "DECODER_SET_INPUT", + [_IOC_NR(DECODER_SET_OUTPUT)] = "DECODER_SET_OUTPUT", + [_IOC_NR(DECODER_ENABLE_OUTPUT)] = "DECODER_ENABLE_OUTPUT", + [_IOC_NR(DECODER_SET_PICTURE)] = "DECODER_SET_PICTURE", + [_IOC_NR(DECODER_SET_GPIO)] = "DECODER_SET_GPIO", + [_IOC_NR(DECODER_INIT)] = "DECODER_INIT", + [_IOC_NR(DECODER_SET_VBI_BYPASS)] = "DECODER_SET_VBI_BYPASS", + [_IOC_NR(DECODER_DUMP)] = "DECODER_DUMP", +#endif + [_IOC_NR(AUDC_SET_RADIO)] = "AUDC_SET_RADIO", + + [_IOC_NR(TUNER_SET_TYPE_ADDR)] = "TUNER_SET_TYPE_ADDR", + [_IOC_NR(TUNER_SET_STANDBY)] = "TUNER_SET_STANDBY", + [_IOC_NR(TUNER_SET_CONFIG)] = "TUNER_SET_CONFIG", + + [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)] = "VIDIOC_INT_S_TUNER_MODE", + [_IOC_NR(VIDIOC_INT_RESET)] = "VIDIOC_INT_RESET", + [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ", + [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)] = "VIDIOC_INT_DECODE_VBI_LINE", + [_IOC_NR(VIDIOC_INT_S_VBI_DATA)] = "VIDIOC_INT_S_VBI_DATA", + [_IOC_NR(VIDIOC_INT_G_VBI_DATA)] = "VIDIOC_INT_G_VBI_DATA", + [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)] = "VIDIOC_INT_I2S_CLOCK_FREQ", + [_IOC_NR(VIDIOC_INT_S_STANDBY)] = "VIDIOC_INT_S_STANDBY", + [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)] = "VIDIOC_INT_S_AUDIO_ROUTING", + [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)] = "VIDIOC_INT_G_AUDIO_ROUTING", + [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)] = "VIDIOC_INT_S_VIDEO_ROUTING", + [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)] = "VIDIOC_INT_G_VIDEO_ROUTING", + [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)] = "VIDIOC_INT_S_CRYSTAL_FREQ", + [_IOC_NR(VIDIOC_INT_INIT)] = "VIDIOC_INT_INIT", + [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)] = "VIDIOC_INT_G_STD_OUTPUT", + [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)] = "VIDIOC_INT_S_STD_OUTPUT", +}; +#define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls) + +/* Common ioctl debug function. This function can be used by + external ioctl messages as well as internal V4L ioctl */ +void v4l_printk_ioctl(unsigned int cmd) +{ + char *dir, *type; + + switch (_IOC_TYPE(cmd)) { + case 'd': + if (_IOC_NR(cmd) >= V4L2_INT_IOCTLS) { + type = "v4l2_int"; + break; + } + printk("%s", v4l2_int_ioctls[_IOC_NR(cmd)]); + return; +#ifdef CONFIG_VIDEO_V4L1_COMPAT + case 'v': + if (_IOC_NR(cmd) >= V4L1_IOCTLS) { + type = "v4l1"; + break; + } + printk("%s", v4l1_ioctls[_IOC_NR(cmd)]); + return; +#endif + case 'V': + if (_IOC_NR(cmd) >= V4L2_IOCTLS) { + type = "v4l2"; + break; + } + printk("%s", v4l2_ioctls[_IOC_NR(cmd)]); + return; + default: + type = "unknown"; + } + + switch (_IOC_DIR(cmd)) { + case _IOC_NONE: dir = "--"; break; + case _IOC_READ: dir = "r-"; break; + case _IOC_WRITE: dir = "-w"; break; + case _IOC_READ | _IOC_WRITE: dir = "rw"; break; + default: dir = "*ERR*"; break; + } + printk("%s ioctl '%c', dir=%s, #%d (0x%08x)", + type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); +} +EXPORT_SYMBOL(v4l_printk_ioctl); + +/* + * helper function -- handles userspace copying for ioctl arguments + */ + +#ifdef __OLD_VIDIOC_ +static unsigned int +video_fix_command(unsigned int cmd) +{ + switch (cmd) { + case VIDIOC_OVERLAY_OLD: + cmd = VIDIOC_OVERLAY; + break; + case VIDIOC_S_PARM_OLD: + cmd = VIDIOC_S_PARM; + break; + case VIDIOC_S_CTRL_OLD: + cmd = VIDIOC_S_CTRL; + break; + case VIDIOC_G_AUDIO_OLD: + cmd = VIDIOC_G_AUDIO; + break; + case VIDIOC_G_AUDOUT_OLD: + cmd = VIDIOC_G_AUDOUT; + break; + case VIDIOC_CROPCAP_OLD: + cmd = VIDIOC_CROPCAP; + break; + } + return cmd; +} +#endif + +/* + * Obsolete usercopy function - Should be removed soon + */ +int +video_usercopy(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg, + int (*func)(struct inode *inode, struct file *file, + unsigned int cmd, void *arg)) +{ + char sbuf[128]; + void *mbuf = NULL; + void *parg = NULL; + int err = -EINVAL; + int is_ext_ctrl; + size_t ctrls_size = 0; + void __user *user_ptr = NULL; + +#ifdef __OLD_VIDIOC_ + cmd = video_fix_command(cmd); +#endif + is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS || + cmd == VIDIOC_TRY_EXT_CTRLS); + + /* Copy arguments into temp kernel buffer */ + switch (_IOC_DIR(cmd)) { + case _IOC_NONE: + parg = NULL; + break; + case _IOC_READ: + case _IOC_WRITE: + case (_IOC_WRITE | _IOC_READ): + if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { + parg = sbuf; + } else { + /* too big to allocate from stack */ + mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); + if (NULL == mbuf) + return -ENOMEM; + parg = mbuf; + } + + err = -EFAULT; + if (_IOC_DIR(cmd) & _IOC_WRITE) + if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd))) + goto out; + break; + } + if (is_ext_ctrl) { + struct v4l2_ext_controls *p = parg; + + /* In case of an error, tell the caller that it wasn't + a specific control that caused it. */ + p->error_idx = p->count; + user_ptr = (void __user *)p->controls; + if (p->count) { + ctrls_size = sizeof(struct v4l2_ext_control) * p->count; + /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */ + mbuf = kmalloc(ctrls_size, GFP_KERNEL); + err = -ENOMEM; + if (NULL == mbuf) + goto out_ext_ctrl; + err = -EFAULT; + if (copy_from_user(mbuf, user_ptr, ctrls_size)) + goto out_ext_ctrl; + p->controls = mbuf; + } + } + + /* call driver */ + err = func(inode, file, cmd, parg); + if (err == -ENOIOCTLCMD) + err = -EINVAL; + if (is_ext_ctrl) { + struct v4l2_ext_controls *p = parg; + + p->controls = (void *)user_ptr; + if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size)) + err = -EFAULT; + goto out_ext_ctrl; + } + if (err < 0) + goto out; + +out_ext_ctrl: + /* Copy results into user buffer */ + switch (_IOC_DIR(cmd)) { + case _IOC_READ: + case (_IOC_WRITE | _IOC_READ): + if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) + err = -EFAULT; + break; + } + +out: + kfree(mbuf); + return err; +} +EXPORT_SYMBOL(video_usercopy); + +static void dbgbuf(unsigned int cmd, struct video_device *vfd, + struct v4l2_buffer *p) +{ + struct v4l2_timecode *tc = &p->timecode; + + dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, " + "bytesused=%d, flags=0x%08d, " + "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n", + p->timestamp.tv_sec / 3600, + (int)(p->timestamp.tv_sec / 60) % 60, + (int)(p->timestamp.tv_sec % 60), + p->timestamp.tv_usec, + p->index, + prt_names(p->type, v4l2_type_names), + p->bytesused, p->flags, + p->field, p->sequence, + prt_names(p->memory, v4l2_memory_names), + p->m.userptr, p->length); + dbgarg2("timecode=%02d:%02d:%02d type=%d, " + "flags=0x%08d, frames=%d, userbits=0x%08x\n", + tc->hours, tc->minutes, tc->seconds, + tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); +} + +static inline void dbgrect(struct video_device *vfd, char *s, + struct v4l2_rect *r) +{ + dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top, + r->width, r->height); +}; + +static inline void v4l_print_pix_fmt(struct video_device *vfd, + struct v4l2_pix_format *fmt) +{ + dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, " + "bytesperline=%d sizeimage=%d, colorspace=%d\n", + fmt->width, fmt->height, + (fmt->pixelformat & 0xff), + (fmt->pixelformat >> 8) & 0xff, + (fmt->pixelformat >> 16) & 0xff, + (fmt->pixelformat >> 24) & 0xff, + prt_names(fmt->field, v4l2_field_names), + fmt->bytesperline, fmt->sizeimage, fmt->colorspace); +}; + +static inline void v4l_print_ext_ctrls(unsigned int cmd, + struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals) +{ + __u32 i; + + if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) + return; + dbgarg(cmd, ""); + printk(KERN_CONT "class=0x%x", c->ctrl_class); + for (i = 0; i < c->count; i++) { + if (show_vals) + printk(KERN_CONT " id/val=0x%x/0x%x", + c->controls[i].id, c->controls[i].value); + else + printk(KERN_CONT " id=0x%x", c->controls[i].id); + } + printk(KERN_CONT "\n"); +}; + +static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) +{ + __u32 i; + + /* zero the reserved fields */ + c->reserved[0] = c->reserved[1] = 0; + for (i = 0; i < c->count; i++) { + c->controls[i].reserved2[0] = 0; + c->controls[i].reserved2[1] = 0; + } + /* V4L2_CID_PRIVATE_BASE cannot be used as control class + when using extended controls. + Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL + is it allowed for backwards compatibility. + */ + if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) + return 0; + /* Check that all controls are from the same control class. */ + for (i = 0; i < c->count; i++) { + if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { + c->error_idx = i; + return 0; + } + } + return 1; +} + +static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type) +{ + if (ops == NULL) + return -EINVAL; + + switch (type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + if (ops->vidioc_try_fmt_vid_cap) + return 0; + break; + case V4L2_BUF_TYPE_VIDEO_OVERLAY: + if (ops->vidioc_try_fmt_vid_overlay) + return 0; + break; + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + if (ops->vidioc_try_fmt_vid_out) + return 0; + break; + case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: + if (ops->vidioc_try_fmt_vid_out_overlay) + return 0; + break; + case V4L2_BUF_TYPE_VBI_CAPTURE: + if (ops->vidioc_try_fmt_vbi_cap) + return 0; + break; + case V4L2_BUF_TYPE_VBI_OUTPUT: + if (ops->vidioc_try_fmt_vbi_out) + return 0; + break; + case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: + if (ops->vidioc_try_fmt_sliced_vbi_cap) + return 0; + break; + case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: + if (ops->vidioc_try_fmt_sliced_vbi_out) + return 0; + break; + case V4L2_BUF_TYPE_PRIVATE: + if (ops->vidioc_try_fmt_type_private) + return 0; + break; + } + return -EINVAL; +} + +static int __video_do_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, void *arg) +{ + struct video_device *vfd = video_devdata(file); + const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; + void *fh = file->private_data; + int ret = -EINVAL; + + if ((vfd->debug & V4L2_DEBUG_IOCTL) && + !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) { + v4l_print_ioctl(vfd->name, cmd); + printk(KERN_CONT "\n"); + } + + if (ops == NULL) { + printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n", + vfd->name); + return -EINVAL; + } + +#ifdef CONFIG_VIDEO_V4L1_COMPAT + /*********************************************************** + Handles calls to the obsoleted V4L1 API + Due to the nature of VIDIOCGMBUF, each driver that supports + V4L1 should implement its own handler for this ioctl. + ***********************************************************/ + + /* --- streaming capture ------------------------------------- */ + if (cmd == VIDIOCGMBUF) { + struct video_mbuf *p = arg; + + memset(p, 0, sizeof(*p)); + + if (!ops->vidiocgmbuf) + return ret; + ret = ops->vidiocgmbuf(file, fh, p); + if (!ret) + dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n", + p->size, p->frames, + (unsigned long)p->offsets); + return ret; + } + + /******************************************************** + All other V4L1 calls are handled by v4l1_compat module. + Those calls will be translated into V4L2 calls, and + __video_do_ioctl will be called again, with one or more + V4L2 ioctls. + ********************************************************/ + if (_IOC_TYPE(cmd) == 'v') + return v4l_compat_translate_ioctl(inode, file, cmd, arg, + __video_do_ioctl); +#endif + + switch (cmd) { + /* --- capabilities ------------------------------------------ */ + case VIDIOC_QUERYCAP: + { + struct v4l2_capability *cap = (struct v4l2_capability *)arg; + memset(cap, 0, sizeof(*cap)); + + if (!ops->vidioc_querycap) + break; + + ret = ops->vidioc_querycap(file, fh, cap); + if (!ret) + dbgarg(cmd, "driver=%s, card=%s, bus=%s, " + "version=0x%08x, " + "capabilities=0x%08x\n", + cap->driver, cap->card, cap->bus_info, + cap->version, + cap->capabilities); + break; + } + + /* --- priority ------------------------------------------ */ + case VIDIOC_G_PRIORITY: + { + enum v4l2_priority *p = arg; + + if (!ops->vidioc_g_priority) + break; + ret = ops->vidioc_g_priority(file, fh, p); + if (!ret) + dbgarg(cmd, "priority is %d\n", *p); + break; + } + case VIDIOC_S_PRIORITY: + { + enum v4l2_priority *p = arg; + + if (!ops->vidioc_s_priority) + break; + dbgarg(cmd, "setting priority to %d\n", *p); + ret = ops->vidioc_s_priority(file, fh, *p); + break; + } + + /* --- capture ioctls ---------------------------------------- */ + case VIDIOC_ENUM_FMT: + { + struct v4l2_fmtdesc *f = arg; + enum v4l2_buf_type type; + unsigned int index; + + index = f->index; + type = f->type; + memset(f, 0, sizeof(*f)); + f->index = index; + f->type = type; + + switch (type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + if (ops->vidioc_enum_fmt_vid_cap) + ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f); + break; + case V4L2_BUF_TYPE_VIDEO_OVERLAY: + if (ops->vidioc_enum_fmt_vid_overlay) + ret = ops->vidioc_enum_fmt_vid_overlay(file, + fh, f); + break; +#if 1 + /* V4L2_BUF_TYPE_VBI_CAPTURE should not support VIDIOC_ENUM_FMT + * according to the spec. The bttv and saa7134 drivers support + * it though, so just warn that this is deprecated and will be + * removed in the near future. */ + case V4L2_BUF_TYPE_VBI_CAPTURE: + if (ops->vidioc_enum_fmt_vbi_cap) { + printk(KERN_WARNING "vidioc_enum_fmt_vbi_cap will be removed in 2.6.28!\n"); + ret = ops->vidioc_enum_fmt_vbi_cap(file, fh, f); + } + break; +#endif + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + if (ops->vidioc_enum_fmt_vid_out) + ret = ops->vidioc_enum_fmt_vid_out(file, fh, f); + break; + case V4L2_BUF_TYPE_PRIVATE: + if (ops->vidioc_enum_fmt_type_private) + ret = ops->vidioc_enum_fmt_type_private(file, + fh, f); + break; + default: + break; + } + if (!ret) + dbgarg(cmd, "index=%d, type=%d, flags=%d, " + "pixelformat=%c%c%c%c, description='%s'\n", + f->index, f->type, f->flags, + (f->pixelformat & 0xff), + (f->pixelformat >> 8) & 0xff, + (f->pixelformat >> 16) & 0xff, + (f->pixelformat >> 24) & 0xff, + f->description); + break; + } + case VIDIOC_G_FMT: + { + struct v4l2_format *f = (struct v4l2_format *)arg; + + memset(f->fmt.raw_data, 0, sizeof(f->fmt.raw_data)); + + /* FIXME: Should be one dump per type */ + dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names)); + + switch (f->type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + if (ops->vidioc_g_fmt_vid_cap) + ret = ops->vidioc_g_fmt_vid_cap(file, fh, f); + if (!ret) + v4l_print_pix_fmt(vfd, &f->fmt.pix); + break; + case V4L2_BUF_TYPE_VIDEO_OVERLAY: + if (ops->vidioc_g_fmt_vid_overlay) + ret = ops->vidioc_g_fmt_vid_overlay(file, + fh, f); + break; + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + if (ops->vidioc_g_fmt_vid_out) + ret = ops->vidioc_g_fmt_vid_out(file, fh, f); + if (!ret) + v4l_print_pix_fmt(vfd, &f->fmt.pix); + break; + case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: + if (ops->vidioc_g_fmt_vid_out_overlay) + ret = ops->vidioc_g_fmt_vid_out_overlay(file, + fh, f); + break; + case V4L2_BUF_TYPE_VBI_CAPTURE: + if (ops->vidioc_g_fmt_vbi_cap) + ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f); + break; + case V4L2_BUF_TYPE_VBI_OUTPUT: + if (ops->vidioc_g_fmt_vbi_out) + ret = ops->vidioc_g_fmt_vbi_out(file, fh, f); + break; + case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: + if (ops->vidioc_g_fmt_sliced_vbi_cap) + ret = ops->vidioc_g_fmt_sliced_vbi_cap(file, + fh, f); + break; + case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: + if (ops->vidioc_g_fmt_sliced_vbi_out) + ret = ops->vidioc_g_fmt_sliced_vbi_out(file, + fh, f); + break; + case V4L2_BUF_TYPE_PRIVATE: + if (ops->vidioc_g_fmt_type_private) + ret = ops->vidioc_g_fmt_type_private(file, + fh, f); + break; + } + + break; + } + case VIDIOC_S_FMT: + { + struct v4l2_format *f = (struct v4l2_format *)arg; + + /* FIXME: Should be one dump per type */ + dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names)); + + switch (f->type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + v4l_print_pix_fmt(vfd, &f->fmt.pix); + if (ops->vidioc_s_fmt_vid_cap) + ret = ops->vidioc_s_fmt_vid_cap(file, fh, f); + break; + case V4L2_BUF_TYPE_VIDEO_OVERLAY: + if (ops->vidioc_s_fmt_vid_overlay) + ret = ops->vidioc_s_fmt_vid_overlay(file, + fh, f); + break; + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + v4l_print_pix_fmt(vfd, &f->fmt.pix); + if (ops->vidioc_s_fmt_vid_out) + ret = ops->vidioc_s_fmt_vid_out(file, fh, f); + break; + case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: + if (ops->vidioc_s_fmt_vid_out_overlay) + ret = ops->vidioc_s_fmt_vid_out_overlay(file, + fh, f); + break; + case V4L2_BUF_TYPE_VBI_CAPTURE: + if (ops->vidioc_s_fmt_vbi_cap) + ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f); + break; + case V4L2_BUF_TYPE_VBI_OUTPUT: + if (ops->vidioc_s_fmt_vbi_out) + ret = ops->vidioc_s_fmt_vbi_out(file, fh, f); + break; + case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: + if (ops->vidioc_s_fmt_sliced_vbi_cap) + ret = ops->vidioc_s_fmt_sliced_vbi_cap(file, + fh, f); + break; + case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: + if (ops->vidioc_s_fmt_sliced_vbi_out) + ret = ops->vidioc_s_fmt_sliced_vbi_out(file, + fh, f); + break; + case V4L2_BUF_TYPE_PRIVATE: + if (ops->vidioc_s_fmt_type_private) + ret = ops->vidioc_s_fmt_type_private(file, + fh, f); + break; + } + break; + } + case VIDIOC_TRY_FMT: + { + struct v4l2_format *f = (struct v4l2_format *)arg; + + /* FIXME: Should be one dump per type */ + dbgarg(cmd, "type=%s\n", prt_names(f->type, + v4l2_type_names)); + switch (f->type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + if (ops->vidioc_try_fmt_vid_cap) + ret = ops->vidioc_try_fmt_vid_cap(file, fh, f); + if (!ret) + v4l_print_pix_fmt(vfd, &f->fmt.pix); + break; + case V4L2_BUF_TYPE_VIDEO_OVERLAY: + if (ops->vidioc_try_fmt_vid_overlay) + ret = ops->vidioc_try_fmt_vid_overlay(file, + fh, f); + break; + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + if (ops->vidioc_try_fmt_vid_out) + ret = ops->vidioc_try_fmt_vid_out(file, fh, f); + if (!ret) + v4l_print_pix_fmt(vfd, &f->fmt.pix); + break; + case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: + if (ops->vidioc_try_fmt_vid_out_overlay) + ret = ops->vidioc_try_fmt_vid_out_overlay(file, + fh, f); + break; + case V4L2_BUF_TYPE_VBI_CAPTURE: + if (ops->vidioc_try_fmt_vbi_cap) + ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f); + break; + case V4L2_BUF_TYPE_VBI_OUTPUT: + if (ops->vidioc_try_fmt_vbi_out) + ret = ops->vidioc_try_fmt_vbi_out(file, fh, f); + break; + case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: + if (ops->vidioc_try_fmt_sliced_vbi_cap) + ret = ops->vidioc_try_fmt_sliced_vbi_cap(file, + fh, f); + break; + case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: + if (ops->vidioc_try_fmt_sliced_vbi_out) + ret = ops->vidioc_try_fmt_sliced_vbi_out(file, + fh, f); + break; + case V4L2_BUF_TYPE_PRIVATE: + if (ops->vidioc_try_fmt_type_private) + ret = ops->vidioc_try_fmt_type_private(file, + fh, f); + break; + } + + break; + } + /* FIXME: Those buf reqs could be handled here, + with some changes on videobuf to allow its header to be included at + videodev2.h or being merged at videodev2. + */ + case VIDIOC_REQBUFS: + { + struct v4l2_requestbuffers *p = arg; + + if (!ops->vidioc_reqbufs) + break; + ret = check_fmt(ops, p->type); + if (ret) + break; + + ret = ops->vidioc_reqbufs(file, fh, p); + dbgarg(cmd, "count=%d, type=%s, memory=%s\n", + p->count, + prt_names(p->type, v4l2_type_names), + prt_names(p->memory, v4l2_memory_names)); + break; + } + case VIDIOC_QUERYBUF: + { + struct v4l2_buffer *p = arg; + + if (!ops->vidioc_querybuf) + break; + ret = check_fmt(ops, p->type); + if (ret) + break; + + ret = ops->vidioc_querybuf(file, fh, p); + if (!ret) + dbgbuf(cmd, vfd, p); + break; + } + case VIDIOC_QBUF: + { + struct v4l2_buffer *p = arg; + + if (!ops->vidioc_qbuf) + break; + ret = check_fmt(ops, p->type); + if (ret) + break; + + ret = ops->vidioc_qbuf(file, fh, p); + if (!ret) + dbgbuf(cmd, vfd, p); + break; + } + case VIDIOC_DQBUF: + { + struct v4l2_buffer *p = arg; + + if (!ops->vidioc_dqbuf) + break; + ret = check_fmt(ops, p->type); + if (ret) + break; + + ret = ops->vidioc_dqbuf(file, fh, p); + if (!ret) + dbgbuf(cmd, vfd, p); + break; + } + case VIDIOC_OVERLAY: + { + int *i = arg; + + if (!ops->vidioc_overlay) + break; + dbgarg(cmd, "value=%d\n", *i); + ret = ops->vidioc_overlay(file, fh, *i); + break; + } + case VIDIOC_G_FBUF: + { + struct v4l2_framebuffer *p = arg; + + if (!ops->vidioc_g_fbuf) + break; + ret = ops->vidioc_g_fbuf(file, fh, arg); + if (!ret) { + dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n", + p->capability, p->flags, + (unsigned long)p->base); + v4l_print_pix_fmt(vfd, &p->fmt); + } + break; + } + case VIDIOC_S_FBUF: + { + struct v4l2_framebuffer *p = arg; + + if (!ops->vidioc_s_fbuf) + break; + dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n", + p->capability, p->flags, (unsigned long)p->base); + v4l_print_pix_fmt(vfd, &p->fmt); + ret = ops->vidioc_s_fbuf(file, fh, arg); + break; + } + case VIDIOC_STREAMON: + { + enum v4l2_buf_type i = *(int *)arg; + + if (!ops->vidioc_streamon) + break; + dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names)); + ret = ops->vidioc_streamon(file, fh, i); + break; + } + case VIDIOC_STREAMOFF: + { + enum v4l2_buf_type i = *(int *)arg; + + if (!ops->vidioc_streamoff) + break; + dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names)); + ret = ops->vidioc_streamoff(file, fh, i); + break; + } + /* ---------- tv norms ---------- */ + case VIDIOC_ENUMSTD: + { + struct v4l2_standard *p = arg; + v4l2_std_id id = vfd->tvnorms, curr_id = 0; + unsigned int index = p->index, i, j = 0; + const char *descr = ""; + + /* Return norm array in a canonical way */ + for (i = 0; i <= index && id; i++) { + /* last std value in the standards array is 0, so this + while always ends there since (id & 0) == 0. */ + while ((id & standards[j].std) != standards[j].std) + j++; + curr_id = standards[j].std; + descr = standards[j].descr; + j++; + if (curr_id == 0) + break; + if (curr_id != V4L2_STD_PAL && + curr_id != V4L2_STD_SECAM && + curr_id != V4L2_STD_NTSC) + id &= ~curr_id; + } + if (i <= index) + return -EINVAL; + + v4l2_video_std_construct(p, curr_id, descr); + p->index = index; + + dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, " + "framelines=%d\n", p->index, + (unsigned long long)p->id, p->name, + p->frameperiod.numerator, + p->frameperiod.denominator, + p->framelines); + + ret = 0; + break; + } + case VIDIOC_G_STD: + { + v4l2_std_id *id = arg; + + ret = 0; + /* Calls the specific handler */ + if (ops->vidioc_g_std) + ret = ops->vidioc_g_std(file, fh, id); + else + *id = vfd->current_norm; + + if (!ret) + dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id); + break; + } + case VIDIOC_S_STD: + { + v4l2_std_id *id = arg, norm; + + dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id); + + norm = (*id) & vfd->tvnorms; + if (vfd->tvnorms && !norm) /* Check if std is supported */ + break; + + /* Calls the specific handler */ + if (ops->vidioc_s_std) + ret = ops->vidioc_s_std(file, fh, &norm); + else + ret = -EINVAL; + + /* Updates standard information */ + if (ret >= 0) + vfd->current_norm = norm; + break; + } + case VIDIOC_QUERYSTD: + { + v4l2_std_id *p = arg; + + if (!ops->vidioc_querystd) + break; + ret = ops->vidioc_querystd(file, fh, arg); + if (!ret) + dbgarg(cmd, "detected std=%08Lx\n", + (unsigned long long)*p); + break; + } + /* ------ input switching ---------- */ + /* FIXME: Inputs can be handled inside videodev2 */ + case VIDIOC_ENUMINPUT: + { + struct v4l2_input *p = arg; + int i = p->index; + + if (!ops->vidioc_enum_input) + break; + memset(p, 0, sizeof(*p)); + p->index = i; + + ret = ops->vidioc_enum_input(file, fh, p); + if (!ret) + dbgarg(cmd, "index=%d, name=%s, type=%d, " + "audioset=%d, " + "tuner=%d, std=%08Lx, status=%d\n", + p->index, p->name, p->type, p->audioset, + p->tuner, + (unsigned long long)p->std, + p->status); + break; + } + case VIDIOC_G_INPUT: + { + unsigned int *i = arg; + + if (!ops->vidioc_g_input) + break; + ret = ops->vidioc_g_input(file, fh, i); + if (!ret) + dbgarg(cmd, "value=%d\n", *i); + break; + } + case VIDIOC_S_INPUT: + { + unsigned int *i = arg; + + if (!ops->vidioc_s_input) + break; + dbgarg(cmd, "value=%d\n", *i); + ret = ops->vidioc_s_input(file, fh, *i); + break; + } + + /* ------ output switching ---------- */ + case VIDIOC_ENUMOUTPUT: + { + struct v4l2_output *p = arg; + int i = p->index; + + if (!ops->vidioc_enum_output) + break; + memset(p, 0, sizeof(*p)); + p->index = i; + + ret = ops->vidioc_enum_output(file, fh, p); + if (!ret) + dbgarg(cmd, "index=%d, name=%s, type=%d, " + "audioset=0x%x, " + "modulator=%d, std=0x%08Lx\n", + p->index, p->name, p->type, p->audioset, + p->modulator, (unsigned long long)p->std); + break; + } + case VIDIOC_G_OUTPUT: + { + unsigned int *i = arg; + + if (!ops->vidioc_g_output) + break; + ret = ops->vidioc_g_output(file, fh, i); + if (!ret) + dbgarg(cmd, "value=%d\n", *i); + break; + } + case VIDIOC_S_OUTPUT: + { + unsigned int *i = arg; + + if (!ops->vidioc_s_output) + break; + dbgarg(cmd, "value=%d\n", *i); + ret = ops->vidioc_s_output(file, fh, *i); + break; + } + + /* --- controls ---------------------------------------------- */ + case VIDIOC_QUERYCTRL: + { + struct v4l2_queryctrl *p = arg; + + if (!ops->vidioc_queryctrl) + break; + ret = ops->vidioc_queryctrl(file, fh, p); + if (!ret) + dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, " + "step=%d, default=%d, flags=0x%08x\n", + p->id, p->type, p->name, + p->minimum, p->maximum, + p->step, p->default_value, p->flags); + else + dbgarg(cmd, "id=0x%x\n", p->id); + break; + } + case VIDIOC_G_CTRL: + { + struct v4l2_control *p = arg; + + if (ops->vidioc_g_ctrl) + ret = ops->vidioc_g_ctrl(file, fh, p); + else if (ops->vidioc_g_ext_ctrls) { + struct v4l2_ext_controls ctrls; + struct v4l2_ext_control ctrl; + + ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); + ctrls.count = 1; + ctrls.controls = &ctrl; + ctrl.id = p->id; + ctrl.value = p->value; + if (check_ext_ctrls(&ctrls, 1)) { + ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); + if (ret == 0) + p->value = ctrl.value; + } + } else + break; + if (!ret) + dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value); + else + dbgarg(cmd, "id=0x%x\n", p->id); + break; + } + case VIDIOC_S_CTRL: + { + struct v4l2_control *p = arg; + struct v4l2_ext_controls ctrls; + struct v4l2_ext_control ctrl; + + if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls) + break; + + dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value); + + if (ops->vidioc_s_ctrl) { + ret = ops->vidioc_s_ctrl(file, fh, p); + break; + } + if (!ops->vidioc_s_ext_ctrls) + break; + + ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); + ctrls.count = 1; + ctrls.controls = &ctrl; + ctrl.id = p->id; + ctrl.value = p->value; + if (check_ext_ctrls(&ctrls, 1)) + ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls); + break; + } + case VIDIOC_G_EXT_CTRLS: + { + struct v4l2_ext_controls *p = arg; + + p->error_idx = p->count; + if (!ops->vidioc_g_ext_ctrls) + break; + if (check_ext_ctrls(p, 0)) + ret = ops->vidioc_g_ext_ctrls(file, fh, p); + v4l_print_ext_ctrls(cmd, vfd, p, !ret); + break; + } + case VIDIOC_S_EXT_CTRLS: + { + struct v4l2_ext_controls *p = arg; + + p->error_idx = p->count; + if (!ops->vidioc_s_ext_ctrls) + break; + v4l_print_ext_ctrls(cmd, vfd, p, 1); + if (check_ext_ctrls(p, 0)) + ret = ops->vidioc_s_ext_ctrls(file, fh, p); + break; + } + case VIDIOC_TRY_EXT_CTRLS: + { + struct v4l2_ext_controls *p = arg; + + p->error_idx = p->count; + if (!ops->vidioc_try_ext_ctrls) + break; + v4l_print_ext_ctrls(cmd, vfd, p, 1); + if (check_ext_ctrls(p, 0)) + ret = ops->vidioc_try_ext_ctrls(file, fh, p); + break; + } + case VIDIOC_QUERYMENU: + { + struct v4l2_querymenu *p = arg; + + if (!ops->vidioc_querymenu) + break; + ret = ops->vidioc_querymenu(file, fh, p); + if (!ret) + dbgarg(cmd, "id=0x%x, index=%d, name=%s\n", + p->id, p->index, p->name); + else + dbgarg(cmd, "id=0x%x, index=%d\n", + p->id, p->index); + break; + } + /* --- audio ---------------------------------------------- */ + case VIDIOC_ENUMAUDIO: + { + struct v4l2_audio *p = arg; + + if (!ops->vidioc_enumaudio) + break; + ret = ops->vidioc_enumaudio(file, fh, p); + if (!ret) + dbgarg(cmd, "index=%d, name=%s, capability=0x%x, " + "mode=0x%x\n", p->index, p->name, + p->capability, p->mode); + else + dbgarg(cmd, "index=%d\n", p->index); + break; + } + case VIDIOC_G_AUDIO: + { + struct v4l2_audio *p = arg; + __u32 index = p->index; + + if (!ops->vidioc_g_audio) + break; + + memset(p, 0, sizeof(*p)); + p->index = index; + ret = ops->vidioc_g_audio(file, fh, p); + if (!ret) + dbgarg(cmd, "index=%d, name=%s, capability=0x%x, " + "mode=0x%x\n", p->index, + p->name, p->capability, p->mode); + else + dbgarg(cmd, "index=%d\n", p->index); + break; + } + case VIDIOC_S_AUDIO: + { + struct v4l2_audio *p = arg; + + if (!ops->vidioc_s_audio) + break; + dbgarg(cmd, "index=%d, name=%s, capability=0x%x, " + "mode=0x%x\n", p->index, p->name, + p->capability, p->mode); + ret = ops->vidioc_s_audio(file, fh, p); + break; + } + case VIDIOC_ENUMAUDOUT: + { + struct v4l2_audioout *p = arg; + + if (!ops->vidioc_enumaudout) + break; + dbgarg(cmd, "Enum for index=%d\n", p->index); + ret = ops->vidioc_enumaudout(file, fh, p); + if (!ret) + dbgarg2("index=%d, name=%s, capability=%d, " + "mode=%d\n", p->index, p->name, + p->capability, p->mode); + break; + } + case VIDIOC_G_AUDOUT: + { + struct v4l2_audioout *p = arg; + + if (!ops->vidioc_g_audout) + break; + dbgarg(cmd, "Enum for index=%d\n", p->index); + ret = ops->vidioc_g_audout(file, fh, p); + if (!ret) + dbgarg2("index=%d, name=%s, capability=%d, " + "mode=%d\n", p->index, p->name, + p->capability, p->mode); + break; + } + case VIDIOC_S_AUDOUT: + { + struct v4l2_audioout *p = arg; + + if (!ops->vidioc_s_audout) + break; + dbgarg(cmd, "index=%d, name=%s, capability=%d, " + "mode=%d\n", p->index, p->name, + p->capability, p->mode); + + ret = ops->vidioc_s_audout(file, fh, p); + break; + } + case VIDIOC_G_MODULATOR: + { + struct v4l2_modulator *p = arg; + + if (!ops->vidioc_g_modulator) + break; + ret = ops->vidioc_g_modulator(file, fh, p); + if (!ret) + dbgarg(cmd, "index=%d, name=%s, " + "capability=%d, rangelow=%d," + " rangehigh=%d, txsubchans=%d\n", + p->index, p->name, p->capability, + p->rangelow, p->rangehigh, + p->txsubchans); + break; + } + case VIDIOC_S_MODULATOR: + { + struct v4l2_modulator *p = arg; + + if (!ops->vidioc_s_modulator) + break; + dbgarg(cmd, "index=%d, name=%s, capability=%d, " + "rangelow=%d, rangehigh=%d, txsubchans=%d\n", + p->index, p->name, p->capability, p->rangelow, + p->rangehigh, p->txsubchans); + ret = ops->vidioc_s_modulator(file, fh, p); + break; + } + case VIDIOC_G_CROP: + { + struct v4l2_crop *p = arg; + + if (!ops->vidioc_g_crop) + break; + dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names)); + ret = ops->vidioc_g_crop(file, fh, p); + if (!ret) + dbgrect(vfd, "", &p->c); + break; + } + case VIDIOC_S_CROP: + { + struct v4l2_crop *p = arg; + + if (!ops->vidioc_s_crop) + break; + dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names)); + dbgrect(vfd, "", &p->c); + ret = ops->vidioc_s_crop(file, fh, p); + break; + } + case VIDIOC_CROPCAP: + { + struct v4l2_cropcap *p = arg; + + /*FIXME: Should also show v4l2_fract pixelaspect */ + if (!ops->vidioc_cropcap) + break; + dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names)); + ret = ops->vidioc_cropcap(file, fh, p); + if (!ret) { + dbgrect(vfd, "bounds ", &p->bounds); + dbgrect(vfd, "defrect ", &p->defrect); + } + break; + } + case VIDIOC_G_JPEGCOMP: + { + struct v4l2_jpegcompression *p = arg; + + if (!ops->vidioc_g_jpegcomp) + break; + ret = ops->vidioc_g_jpegcomp(file, fh, p); + if (!ret) + dbgarg(cmd, "quality=%d, APPn=%d, " + "APP_len=%d, COM_len=%d, " + "jpeg_markers=%d\n", + p->quality, p->APPn, p->APP_len, + p->COM_len, p->jpeg_markers); + break; + } + case VIDIOC_S_JPEGCOMP: + { + struct v4l2_jpegcompression *p = arg; + + if (!ops->vidioc_g_jpegcomp) + break; + dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, " + "COM_len=%d, jpeg_markers=%d\n", + p->quality, p->APPn, p->APP_len, + p->COM_len, p->jpeg_markers); + ret = ops->vidioc_s_jpegcomp(file, fh, p); + break; + } + case VIDIOC_G_ENC_INDEX: + { + struct v4l2_enc_idx *p = arg; + + if (!ops->vidioc_g_enc_index) + break; + ret = ops->vidioc_g_enc_index(file, fh, p); + if (!ret) + dbgarg(cmd, "entries=%d, entries_cap=%d\n", + p->entries, p->entries_cap); + break; + } + case VIDIOC_ENCODER_CMD: + { + struct v4l2_encoder_cmd *p = arg; + + if (!ops->vidioc_encoder_cmd) + break; + memset(&p->raw, 0, sizeof(p->raw)); + ret = ops->vidioc_encoder_cmd(file, fh, p); + if (!ret) + dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags); + break; + } + case VIDIOC_TRY_ENCODER_CMD: + { + struct v4l2_encoder_cmd *p = arg; + + if (!ops->vidioc_try_encoder_cmd) + break; + memset(&p->raw, 0, sizeof(p->raw)); + ret = ops->vidioc_try_encoder_cmd(file, fh, p); + if (!ret) + dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags); + break; + } + case VIDIOC_G_PARM: + { + struct v4l2_streamparm *p = arg; + __u32 type = p->type; + + memset(p, 0, sizeof(*p)); + p->type = type; + + if (ops->vidioc_g_parm) { + ret = ops->vidioc_g_parm(file, fh, p); + } else { + struct v4l2_standard s; + + if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + v4l2_video_std_construct(&s, vfd->current_norm, + v4l2_norm_to_name(vfd->current_norm)); + + p->parm.capture.timeperframe = s.frameperiod; + ret = 0; + } + + dbgarg(cmd, "type=%d\n", p->type); + break; + } + case VIDIOC_S_PARM: + { + struct v4l2_streamparm *p = arg; + + if (!ops->vidioc_s_parm) + break; + dbgarg(cmd, "type=%d\n", p->type); + ret = ops->vidioc_s_parm(file, fh, p); + break; + } + case VIDIOC_G_TUNER: + { + struct v4l2_tuner *p = arg; + __u32 index = p->index; + + if (!ops->vidioc_g_tuner) + break; + + memset(p, 0, sizeof(*p)); + p->index = index; + + ret = ops->vidioc_g_tuner(file, fh, p); + if (!ret) + dbgarg(cmd, "index=%d, name=%s, type=%d, " + "capability=0x%x, rangelow=%d, " + "rangehigh=%d, signal=%d, afc=%d, " + "rxsubchans=0x%x, audmode=%d\n", + p->index, p->name, p->type, + p->capability, p->rangelow, + p->rangehigh, p->signal, p->afc, + p->rxsubchans, p->audmode); + break; + } + case VIDIOC_S_TUNER: + { + struct v4l2_tuner *p = arg; + + if (!ops->vidioc_s_tuner) + break; + dbgarg(cmd, "index=%d, name=%s, type=%d, " + "capability=0x%x, rangelow=%d, " + "rangehigh=%d, signal=%d, afc=%d, " + "rxsubchans=0x%x, audmode=%d\n", + p->index, p->name, p->type, + p->capability, p->rangelow, + p->rangehigh, p->signal, p->afc, + p->rxsubchans, p->audmode); + ret = ops->vidioc_s_tuner(file, fh, p); + break; + } + case VIDIOC_G_FREQUENCY: + { + struct v4l2_frequency *p = arg; + + if (!ops->vidioc_g_frequency) + break; + + memset(p->reserved, 0, sizeof(p->reserved)); + + ret = ops->vidioc_g_frequency(file, fh, p); + if (!ret) + dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n", + p->tuner, p->type, p->frequency); + break; + } + case VIDIOC_S_FREQUENCY: + { + struct v4l2_frequency *p = arg; + + if (!ops->vidioc_s_frequency) + break; + dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n", + p->tuner, p->type, p->frequency); + ret = ops->vidioc_s_frequency(file, fh, p); + break; + } + case VIDIOC_G_SLICED_VBI_CAP: + { + struct v4l2_sliced_vbi_cap *p = arg; + __u32 type = p->type; + + if (!ops->vidioc_g_sliced_vbi_cap) + break; + memset(p, 0, sizeof(*p)); + p->type = type; + dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names)); + ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p); + if (!ret) + dbgarg2("service_set=%d\n", p->service_set); + break; + } + case VIDIOC_LOG_STATUS: + { + if (!ops->vidioc_log_status) + break; + ret = ops->vidioc_log_status(file, fh); + break; + } +#ifdef CONFIG_VIDEO_ADV_DEBUG + case VIDIOC_DBG_G_REGISTER: + { + struct v4l2_register *p = arg; + + if (!capable(CAP_SYS_ADMIN)) + ret = -EPERM; + else if (ops->vidioc_g_register) + ret = ops->vidioc_g_register(file, fh, p); + break; + } + case VIDIOC_DBG_S_REGISTER: + { + struct v4l2_register *p = arg; + + if (!capable(CAP_SYS_ADMIN)) + ret = -EPERM; + else if (ops->vidioc_s_register) + ret = ops->vidioc_s_register(file, fh, p); + break; + } +#endif + case VIDIOC_G_CHIP_IDENT: + { + struct v4l2_chip_ident *p = arg; + + if (!ops->vidioc_g_chip_ident) + break; + ret = ops->vidioc_g_chip_ident(file, fh, p); + if (!ret) + dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision); + break; + } + case VIDIOC_S_HW_FREQ_SEEK: + { + struct v4l2_hw_freq_seek *p = arg; + + if (!ops->vidioc_s_hw_freq_seek) + break; + dbgarg(cmd, + "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n", + p->tuner, p->type, p->seek_upward, p->wrap_around); + ret = ops->vidioc_s_hw_freq_seek(file, fh, p); + break; + } + default: + { + if (!ops->vidioc_default) + break; + ret = ops->vidioc_default(file, fh, cmd, arg); + break; + } + } /* switch */ + + if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) { + if (ret < 0) { + v4l_print_ioctl(vfd->name, cmd); + printk(KERN_CONT " error %d\n", ret); + } + } + + return ret; +} + +int video_ioctl2(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + char sbuf[128]; + void *mbuf = NULL; + void *parg = NULL; + int err = -EINVAL; + int is_ext_ctrl; + size_t ctrls_size = 0; + void __user *user_ptr = NULL; + +#ifdef __OLD_VIDIOC_ + cmd = video_fix_command(cmd); +#endif + is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS || + cmd == VIDIOC_TRY_EXT_CTRLS); + + /* Copy arguments into temp kernel buffer */ + switch (_IOC_DIR(cmd)) { + case _IOC_NONE: + parg = NULL; + break; + case _IOC_READ: + case _IOC_WRITE: + case (_IOC_WRITE | _IOC_READ): + if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { + parg = sbuf; + } else { + /* too big to allocate from stack */ + mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); + if (NULL == mbuf) + return -ENOMEM; + parg = mbuf; + } + + err = -EFAULT; + if (_IOC_DIR(cmd) & _IOC_WRITE) + if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd))) + goto out; + break; + } + + if (is_ext_ctrl) { + struct v4l2_ext_controls *p = parg; + + /* In case of an error, tell the caller that it wasn't + a specific control that caused it. */ + p->error_idx = p->count; + user_ptr = (void __user *)p->controls; + if (p->count) { + ctrls_size = sizeof(struct v4l2_ext_control) * p->count; + /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */ + mbuf = kmalloc(ctrls_size, GFP_KERNEL); + err = -ENOMEM; + if (NULL == mbuf) + goto out_ext_ctrl; + err = -EFAULT; + if (copy_from_user(mbuf, user_ptr, ctrls_size)) + goto out_ext_ctrl; + p->controls = mbuf; + } + } + + /* Handles IOCTL */ + err = __video_do_ioctl(inode, file, cmd, parg); + if (err == -ENOIOCTLCMD) + err = -EINVAL; + if (is_ext_ctrl) { + struct v4l2_ext_controls *p = parg; + + p->controls = (void *)user_ptr; + if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size)) + err = -EFAULT; + goto out_ext_ctrl; + } + if (err < 0) + goto out; + +out_ext_ctrl: + /* Copy results into user buffer */ + switch (_IOC_DIR(cmd)) { + case _IOC_READ: + case (_IOC_WRITE | _IOC_READ): + if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) + err = -EFAULT; + break; + } + +out: + kfree(mbuf); + return err; +} +EXPORT_SYMBOL(video_ioctl2); |