diff options
Diffstat (limited to 'drivers/media/dvb/dvb-usb/dvb-usb-init.c')
| -rw-r--r-- | drivers/media/dvb/dvb-usb/dvb-usb-init.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-init.c b/drivers/media/dvb/dvb-usb/dvb-usb-init.c new file mode 100644 index 000000000000..3aadec974cf1 --- /dev/null +++ b/drivers/media/dvb/dvb-usb/dvb-usb-init.c @@ -0,0 +1,211 @@ +/* + * DVB USB library - provides a generic interface for a DVB USB device driver. + * + * dvb-usb-init.c + * + * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de) + * + * 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, version 2. + * + * see Documentation/dvb/README.dvb-usb for more information + */ +#include "dvb-usb-common.h" + +/* debug */ +int dvb_usb_debug; +module_param_named(debug,dvb_usb_debug, int, 0644); +MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,pll=4,ts=8,err=16,rc=32,fw=64 (or-able))." DVB_USB_DEBUG_STATUS); + +/* general initialization functions */ +int dvb_usb_exit(struct dvb_usb_device *d) +{ + deb_info("state before exiting everything: %x\n",d->state); + dvb_usb_remote_exit(d); + dvb_usb_fe_exit(d); + dvb_usb_i2c_exit(d); + dvb_usb_dvb_exit(d); + dvb_usb_urb_exit(d); + deb_info("state should be zero now: %x\n",d->state); + d->state = DVB_USB_STATE_INIT; + kfree(d->priv); + kfree(d); + return 0; +} + +static int dvb_usb_init(struct dvb_usb_device *d) +{ + int ret = 0; + + sema_init(&d->usb_sem, 1); + sema_init(&d->i2c_sem, 1); + + d->state = DVB_USB_STATE_INIT; + +/* check the capabilites and set appropriate variables */ + +/* speed - when running at FULL speed we need a HW PID filter */ + if (d->udev->speed == USB_SPEED_FULL && !(d->props.caps & DVB_USB_HAS_PID_FILTER)) { + err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a HW PID filter)"); + return -ENODEV; + } + + if ((d->udev->speed == USB_SPEED_FULL && d->props.caps & DVB_USB_HAS_PID_FILTER) || + (d->props.caps & DVB_USB_NEED_PID_FILTERING)) { + info("will use the device's hw PID filter."); + d->pid_filtering = 1; + d->max_feed_count = d->props.pid_filter_count; + } else { + info("will pass the complete MPEG2 transport stream to the demuxer."); + d->pid_filtering = 0; + d->max_feed_count = 255; + } + + if (d->props.power_ctrl) + d->props.power_ctrl(d,1); + + if ((ret = dvb_usb_urb_init(d)) || + (ret = dvb_usb_dvb_init(d)) || + (ret = dvb_usb_i2c_init(d)) || + (ret = dvb_usb_fe_init(d))) { + dvb_usb_exit(d); + return ret; + } + + if ((ret = dvb_usb_remote_init(d))) + err("could not initialize remote control."); + + if (d->props.power_ctrl) + d->props.power_ctrl(d,0); + + return 0; +} + +/* determine the name and the state of the just found USB device */ +static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_properties *props, int *cold) +{ + int i,j; + struct dvb_usb_device_description *desc = NULL; + *cold = -1; + + for (i = 0; i < props->num_device_descs; i++) { + + for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) { + deb_info("check for cold %x %x\n",props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct); + if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && + props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { + *cold = 1; + desc = &props->devices[i]; + break; + } + } + + if (desc != NULL) + break; + + for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) { + deb_info("check for warm %x %x\n",props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct); + if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && + props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { + *cold = 0; + desc = &props->devices[i]; + break; + } + } + } + + if (desc != NULL && props->identify_state != NULL) + props->identify_state(udev,props,&desc,cold); + + return desc; +} + +/* + * USB + */ +int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_properties *props, struct module *owner) +{ + struct usb_device *udev = interface_to_usbdev(intf); + struct dvb_usb_device *d = NULL; + struct dvb_usb_device_description *desc = NULL; + + int ret = -ENOMEM,cold=0; + + if ((desc = dvb_usb_find_device(udev,props,&cold)) == NULL) { + deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n"); + return -ENODEV; + } + + if (cold) { + info("found a '%s' in cold state, will try to load a firmware",desc->name); + ret = usb_cypress_load_firmware(udev,props->firmware,props->usb_ctrl); + } else { + info("found a '%s' in warm state.",desc->name); + d = kmalloc(sizeof(struct dvb_usb_device),GFP_KERNEL); + if (d == NULL) { + err("no memory for 'struct dvb_usb_device'"); + return ret; + } + memset(d,0,sizeof(struct dvb_usb_device)); + + d->udev = udev; + memcpy(&d->props,props,sizeof(struct dvb_usb_properties)); + d->desc = desc; + d->owner = owner; + + if (d->props.size_of_priv > 0) { + d->priv = kmalloc(d->props.size_of_priv,GFP_KERNEL); + if (d->priv == NULL) { + err("no memory for priv in 'struct dvb_usb_device'"); + kfree(d); + return -ENOMEM; + } + memset(d->priv,0,d->props.size_of_priv); + } + + usb_set_intfdata(intf, d); + + ret = dvb_usb_init(d); + } + + if (ret == 0) + info("%s successfully initialized and connected.",desc->name); + else + info("%s error while loading driver (%d)",desc->name,ret); + return ret; +} +EXPORT_SYMBOL(dvb_usb_device_init); + +void dvb_usb_device_exit(struct usb_interface *intf) +{ + struct dvb_usb_device *d = usb_get_intfdata(intf); + const char *name = "generic DVB-USB module"; + + usb_set_intfdata(intf,NULL); + if (d != NULL && d->desc != NULL) { + name = d->desc->name; + dvb_usb_exit(d); + } + info("%s successfully deinitialized and disconnected.",name); + +} +EXPORT_SYMBOL(dvb_usb_device_exit); + +/* module stuff */ +static int __init dvb_usb_module_init(void) +{ + return 0; +} + +static void __exit dvb_usb_module_exit(void) +{ +} + +module_init (dvb_usb_module_init); +module_exit (dvb_usb_module_exit); + +MODULE_VERSION("0.3"); +MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>"); +MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices"); +MODULE_LICENSE("GPL"); |