1 files changed, 289 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 00000000000..2e3ea0fa28e
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-init.c
@@ -0,0 +1,289 @@
+/*
+ * DVB USB library - provides a generic interface for a DVB USB device driver.
+ *
+ * dvb-usb-init.c
+ *
+ * Copyright (C) 2004-6 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,mem=128,uxfer=256  (or-able))." DVB_USB_DEBUG_STATUS);
+
+int dvb_usb_disable_rc_polling;
+module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644);
+MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0).");
+
+static int dvb_usb_force_pid_filter_usage;
+module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444);
+MODULE_PARM_DESC(force_pid_filter_usage, "force all dvb-usb-devices to use a PID filter, if any (default: 0).");
+
+static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)
+{
+        struct dvb_usb_adapter *adap;
+        int ret, n;
+
+        for (n = 0; n < d->props.num_adapters; n++) {
+                adap = &d->adapter[n];
+                adap->dev = d;
+                adap->id  = n;
+
+                memcpy(&adap->props, &d->props.adapter[n], sizeof(struct dvb_usb_adapter_properties));
+
+                /* speed - when running at FULL speed we need a HW PID filter */
+                if (d->udev->speed == USB_SPEED_FULL && !(adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER)) {
+                        err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
+                        return -ENODEV;
+                }
+
+                if ((d->udev->speed == USB_SPEED_FULL && adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) ||
+                        (adap->props.caps & DVB_USB_ADAP_NEED_PID_FILTERING)) {
+                        info("will use the device's hardware PID filter (table count: %d).", adap->props.pid_filter_count);
+                        adap->pid_filtering  = 1;
+                        adap->max_feed_count = adap->props.pid_filter_count;
+                } else {
+                        info("will pass the complete MPEG2 transport stream to the software demuxer.");
+                        adap->pid_filtering  = 0;
+                        adap->max_feed_count = 255;
+                }
+
+                if (!adap->pid_filtering &&
+                        dvb_usb_force_pid_filter_usage &&
+                        adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) {
+                        info("pid filter enabled by module option.");
+                        adap->pid_filtering  = 1;
+                        adap->max_feed_count = adap->props.pid_filter_count;
+                }
+
+                if (adap->props.size_of_priv > 0) {
+                        adap->priv = kzalloc(adap->props.size_of_priv, GFP_KERNEL);
+                        if (adap->priv == NULL) {
+                                err("no memory for priv for adapter %d.", n);
+                                return -ENOMEM;
+                        }
+                }
+
+                if ((ret = dvb_usb_adapter_stream_init(adap)) ||
+                        (ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs)) ||
+                        (ret = dvb_usb_adapter_frontend_init(adap))) {
+                        return ret;
+                }
+
+                d->num_adapters_initialized++;
+                d->state |= DVB_USB_STATE_DVB;
+        }
+
+        /*
+         * when reloading the driver w/o replugging the device
+         * sometimes a timeout occures, this helps
+         */
+        if (d->props.generic_bulk_ctrl_endpoint != 0) {
+                usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
+                usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
+        }
+
+        return 0;
+}
+
+static int dvb_usb_adapter_exit(struct dvb_usb_device *d)
+{
+        int n;
+
+        for (n = 0; n < d->num_adapters_initialized; n++) {
+                dvb_usb_adapter_frontend_exit(&d->adapter[n]);
+                dvb_usb_adapter_dvb_exit(&d->adapter[n]);
+                dvb_usb_adapter_stream_exit(&d->adapter[n]);
+                kfree(d->adapter[n].priv);
+        }
+        d->num_adapters_initialized = 0;
+        d->state &= ~DVB_USB_STATE_DVB;
+        return 0;
+}
+
+
+/* general initialization functions */
+static 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_adapter_exit(d);
+        dvb_usb_i2c_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, short *adapter_nums)
+{
+        int ret = 0;
+
+        mutex_init(&d->usb_mutex);
+        mutex_init(&d->i2c_mutex);
+
+        d->state = DVB_USB_STATE_INIT;
+
+        if (d->props.size_of_priv > 0) {
+                d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL);
+                if (d->priv == NULL) {
+                        err("no memory for priv in 'struct dvb_usb_device'");
+                        return -ENOMEM;
+                }
+        }
+
+        /* check the capabilities and set appropriate variables */
+        dvb_usb_device_power_ctrl(d, 1);
+
+        if ((ret = dvb_usb_i2c_init(d)) ||
+                (ret = dvb_usb_adapter_init(d, adapter_nums))) {
+                dvb_usb_exit(d);
+                return ret;
+        }
+
+        if ((ret = dvb_usb_remote_init(d)))
+                err("could not initialize remote control.");
+
+        dvb_usb_device_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_device_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;
+}
+
+int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff)
+{
+        if (onoff)
+                d->powered++;
+        else
+                d->powered--;
+
+        if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */
+                deb_info("power control: %d\n", onoff);
+                if (d->props.power_ctrl)
+                        return d->props.power_ctrl(d, onoff);
+        }
+        return 0;
+}
+
+/*
+ * USB
+ */
+int dvb_usb_device_init(struct usb_interface *intf,
+                        struct dvb_usb_device_properties *props,
+                        struct module *owner, struct dvb_usb_device **du,
+                        short *adapter_nums)
+{
+        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 (du != NULL)
+                *du = NULL;
+
+        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 = dvb_usb_download_firmware(udev, props);
+                if (!props->no_reconnect || ret != 0)
+                        return ret;
+        }
+
+        info("found a '%s' in warm state.", desc->name);
+        d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
+        if (d == NULL) {
+                err("no memory for 'struct dvb_usb_device'");
+                return -ENOMEM;
+        }
+
+        d->udev = udev;
+        memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties));
+        d->desc = desc;
+        d->owner = owner;
+
+        usb_set_intfdata(intf, d);
+
+        if (du != NULL)
+                *du = d;
+
+        ret = dvb_usb_init(d, adapter_nums);
+
+        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_VERSION("1.0");
+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");