From 9133aee09e3689c116c526fa9011c33b872e65c1 Mon Sep 17 00:00:00 2001 From: Michael Krufky Date: Sat, 23 May 2009 18:00:59 -0300 Subject: [PATCH] V4L/DVB (13103): create a standard method for dvb adapter drivers to override frontend ioctls Signed-off-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/dvb-core/dvb_frontend.c | 20 +++++++++++++++- drivers/media/dvb/dvb-core/dvbdev.h | 28 +++++++++++++++++++++++ drivers/media/video/cx23885/cx23885-dvb.c | 2 +- drivers/media/video/cx88/cx88-dvb.c | 2 +- drivers/media/video/saa7134/saa7134-dvb.c | 2 +- drivers/media/video/videobuf-dvb.c | 11 ++++++--- include/media/videobuf-dvb.h | 4 +++- 7 files changed, 61 insertions(+), 8 deletions(-) diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c index 98082416aa52..e9ec8e911056 100644 --- a/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -1712,7 +1712,18 @@ static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file, struct dvb_device *dvbdev = file->private_data; struct dvb_frontend *fe = dvbdev->priv; struct dvb_frontend_private *fepriv = fe->frontend_priv; - int err = -EOPNOTSUPP; + int cb_err, err = -EOPNOTSUPP; + + if (fe->dvb->fe_ioctl_override) { + cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg, + DVB_FE_IOCTL_PRE); + if (cb_err < 0) + return cb_err; + if (cb_err > 0) + return 0; + /* fe_ioctl_override returning 0 allows + * dvb-core to continue handling the ioctl */ + } switch (cmd) { case FE_GET_INFO: { @@ -1978,6 +1989,13 @@ static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file, break; }; + if (fe->dvb->fe_ioctl_override) { + cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg, + DVB_FE_IOCTL_POST); + if (cb_err < 0) + return cb_err; + } + return err; } diff --git a/drivers/media/dvb/dvb-core/dvbdev.h b/drivers/media/dvb/dvb-core/dvbdev.h index 01fc70484743..f7b499d4a3c0 100644 --- a/drivers/media/dvb/dvb-core/dvbdev.h +++ b/drivers/media/dvb/dvb-core/dvbdev.h @@ -54,6 +54,8 @@ module_param_array(adapter_nr, short, NULL, 0444); \ MODULE_PARM_DESC(adapter_nr, "DVB adapter numbers") +struct dvb_frontend; + struct dvb_adapter { int num; struct list_head list_head; @@ -69,6 +71,32 @@ struct dvb_adapter { int mfe_shared; /* indicates mutually exclusive frontends */ struct dvb_device *mfe_dvbdev; /* frontend device in use */ struct mutex mfe_lock; /* access lock for thread creation */ + + /* Allow the adapter/bridge driver to perform an action before and/or + * after the core handles an ioctl: + * + * DVB_FE_IOCTL_PRE indicates that the ioctl has not yet been handled. + * DVB_FE_IOCTL_POST indicates that the ioctl has been handled. + * + * When DVB_FE_IOCTL_PRE is passed to the callback as the stage arg: + * + * return 0 to allow dvb-core to handle the ioctl. + * return a positive int to prevent dvb-core from handling the ioctl, + * and exit without error. + * return a negative int to prevent dvb-core from handling the ioctl, + * and return that value as an error. + * + * When DVB_FE_IOCTL_POST is passed to the callback as the stage arg: + * + * return 0 to allow the dvb_frontend ioctl handler to exit normally. + * return a negative int to cause the dvb_frontend ioctl handler to + * return that value as an error. + */ +#define DVB_FE_IOCTL_PRE 0 +#define DVB_FE_IOCTL_POST 1 + int (*fe_ioctl_override)(struct dvb_frontend *fe, + unsigned int cmd, void *parg, + unsigned int stage); }; diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c index 45e13ee66dc7..0a03e02b119b 100644 --- a/drivers/media/video/cx23885/cx23885-dvb.c +++ b/drivers/media/video/cx23885/cx23885-dvb.c @@ -904,7 +904,7 @@ static int dvb_register(struct cx23885_tsport *port) /* register everything */ ret = videobuf_dvb_register_bus(&port->frontends, THIS_MODULE, port, - &dev->pci->dev, adapter_nr, 0); + &dev->pci->dev, adapter_nr, 0, NULL); /* init CI & MAC */ switch (dev->board) { diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c index 518bcfe18bcb..d9e402b25b56 100644 --- a/drivers/media/video/cx88/cx88-dvb.c +++ b/drivers/media/video/cx88/cx88-dvb.c @@ -1174,7 +1174,7 @@ static int dvb_register(struct cx8802_dev *dev) /* register everything */ return videobuf_dvb_register_bus(&dev->frontends, THIS_MODULE, dev, - &dev->pci->dev, adapter_nr, mfe_shared); + &dev->pci->dev, adapter_nr, mfe_shared, NULL); frontend_detach: core->gate_ctrl = NULL; diff --git a/drivers/media/video/saa7134/saa7134-dvb.c b/drivers/media/video/saa7134/saa7134-dvb.c index 058b56bf6717..96d3668f4691 100644 --- a/drivers/media/video/saa7134/saa7134-dvb.c +++ b/drivers/media/video/saa7134/saa7134-dvb.c @@ -1574,7 +1574,7 @@ static int dvb_init(struct saa7134_dev *dev) /* register everything else */ ret = videobuf_dvb_register_bus(&dev->frontends, THIS_MODULE, dev, - &dev->pci->dev, adapter_nr, 0); + &dev->pci->dev, adapter_nr, 0, NULL); /* this sequence is necessary to make the tda1004x load its firmware * and to enter analog mode of hybrid boards diff --git a/drivers/media/video/videobuf-dvb.c b/drivers/media/video/videobuf-dvb.c index 0e7dcba8e4ae..a56cf0d3a6d6 100644 --- a/drivers/media/video/videobuf-dvb.c +++ b/drivers/media/video/videobuf-dvb.c @@ -139,7 +139,9 @@ static int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe, struct device *device, char *adapter_name, short *adapter_nr, - int mfe_shared) + int mfe_shared, + int (*fe_ioctl_override)(struct dvb_frontend *, + unsigned int, void *, unsigned int)) { int result; @@ -154,6 +156,7 @@ static int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe, } fe->adapter.priv = adapter_priv; fe->adapter.mfe_shared = mfe_shared; + fe->adapter.fe_ioctl_override = fe_ioctl_override; return result; } @@ -253,7 +256,9 @@ int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f, void *adapter_priv, struct device *device, short *adapter_nr, - int mfe_shared) + int mfe_shared, + int (*fe_ioctl_override)(struct dvb_frontend *, + unsigned int, void *, unsigned int)) { struct list_head *list, *q; struct videobuf_dvb_frontend *fe; @@ -267,7 +272,7 @@ int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f, /* Bring up the adapter */ res = videobuf_dvb_register_adapter(f, module, adapter_priv, device, - fe->dvb.name, adapter_nr, mfe_shared); + fe->dvb.name, adapter_nr, mfe_shared, fe_ioctl_override); if (res < 0) { printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res); return res; diff --git a/include/media/videobuf-dvb.h b/include/media/videobuf-dvb.h index 6ba4f1271d23..07cf4b9d0a65 100644 --- a/include/media/videobuf-dvb.h +++ b/include/media/videobuf-dvb.h @@ -42,7 +42,9 @@ int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f, void *adapter_priv, struct device *device, short *adapter_nr, - int mfe_shared); + int mfe_shared, + int (*fe_ioctl_override)(struct dvb_frontend *, + unsigned int, void *, unsigned int)); void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f); -- 2.39.5