cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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a800.c (3997B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/* DVB USB framework compliant Linux driver for the AVerMedia AverTV DVB-T
      3 * USB2.0 (A800) DVB-T receiver.
      4 *
      5 * Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@posteo.de)
      6 *
      7 * Thanks to
      8 *   - AVerMedia who kindly provided information and
      9 *   - Glen Harris who suffered from my mistakes during development.
     10 *
     11 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
     12 */
     13#include "dibusb.h"
     14
     15static int debug;
     16module_param(debug, int, 0644);
     17MODULE_PARM_DESC(debug, "set debugging level (rc=1 (or-able))." DVB_USB_DEBUG_STATUS);
     18
     19DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
     20
     21#define deb_rc(args...)   dprintk(debug,0x01,args)
     22
     23static int a800_power_ctrl(struct dvb_usb_device *d, int onoff)
     24{
     25	/* do nothing for the AVerMedia */
     26	return 0;
     27}
     28
     29/* assure to put cold to 0 for iManufacturer == 1 */
     30static int a800_identify_state(struct usb_device *udev,
     31			       const struct dvb_usb_device_properties *props,
     32			       const struct dvb_usb_device_description **desc,
     33			       int *cold)
     34{
     35	*cold = udev->descriptor.iManufacturer != 1;
     36	return 0;
     37}
     38
     39static int a800_rc_query(struct dvb_usb_device *d)
     40{
     41	int ret = 0;
     42	u8 *key = kmalloc(5, GFP_KERNEL);
     43	if (!key)
     44		return -ENOMEM;
     45
     46	if (usb_control_msg(d->udev,usb_rcvctrlpipe(d->udev,0),
     47				0x04, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, key, 5,
     48				2000) != 5) {
     49		ret = -ENODEV;
     50		goto out;
     51	}
     52
     53	/* Note that extended nec and nec32 are dropped */
     54	if (key[0] == 1)
     55		rc_keydown(d->rc_dev, RC_PROTO_NEC,
     56			   RC_SCANCODE_NEC(key[1], key[3]), 0);
     57	else if (key[0] == 2)
     58		rc_repeat(d->rc_dev);
     59out:
     60	kfree(key);
     61	return ret;
     62}
     63
     64/* USB Driver stuff */
     65static struct dvb_usb_device_properties a800_properties;
     66
     67static int a800_probe(struct usb_interface *intf,
     68		const struct usb_device_id *id)
     69{
     70	return dvb_usb_device_init(intf, &a800_properties,
     71				   THIS_MODULE, NULL, adapter_nr);
     72}
     73
     74/* do not change the order of the ID table */
     75enum {
     76	AVERMEDIA_DVBT_USB2_COLD,
     77	AVERMEDIA_DVBT_USB2_WARM,
     78};
     79
     80static struct usb_device_id a800_table[] = {
     81	DVB_USB_DEV(AVERMEDIA, AVERMEDIA_DVBT_USB2_COLD),
     82	DVB_USB_DEV(AVERMEDIA, AVERMEDIA_DVBT_USB2_WARM),
     83	{ }
     84};
     85
     86MODULE_DEVICE_TABLE (usb, a800_table);
     87
     88static struct dvb_usb_device_properties a800_properties = {
     89	.caps = DVB_USB_IS_AN_I2C_ADAPTER,
     90
     91	.usb_ctrl = CYPRESS_FX2,
     92	.firmware = "dvb-usb-avertv-a800-02.fw",
     93
     94	.num_adapters = 1,
     95	.adapter = {
     96		{
     97		.num_frontends = 1,
     98		.fe = {{
     99			.caps = DVB_USB_ADAP_HAS_PID_FILTER | DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF,
    100			.pid_filter_count = 32,
    101			.streaming_ctrl   = dibusb2_0_streaming_ctrl,
    102			.pid_filter       = dibusb_pid_filter,
    103			.pid_filter_ctrl  = dibusb_pid_filter_ctrl,
    104
    105			.frontend_attach  = dibusb_dib3000mc_frontend_attach,
    106			.tuner_attach     = dibusb_dib3000mc_tuner_attach,
    107
    108			/* parameter for the MPEG2-data transfer */
    109					.stream = {
    110						.type = USB_BULK,
    111				.count = 7,
    112				.endpoint = 0x06,
    113				.u = {
    114					.bulk = {
    115						.buffersize = 4096,
    116					}
    117				}
    118			},
    119		}},
    120			.size_of_priv     = sizeof(struct dibusb_state),
    121		},
    122	},
    123
    124	.power_ctrl       = a800_power_ctrl,
    125	.identify_state   = a800_identify_state,
    126
    127	.rc.core = {
    128		.rc_interval	= DEFAULT_RC_INTERVAL,
    129		.rc_codes	= RC_MAP_AVERMEDIA_M135A,
    130		.module_name	= KBUILD_MODNAME,
    131		.rc_query	= a800_rc_query,
    132		.allowed_protos = RC_PROTO_BIT_NEC,
    133	},
    134
    135	.i2c_algo         = &dibusb_i2c_algo,
    136
    137	.generic_bulk_ctrl_endpoint = 0x01,
    138	.num_device_descs = 1,
    139	.devices = {
    140		{   "AVerMedia AverTV DVB-T USB 2.0 (A800)",
    141			{ &a800_table[AVERMEDIA_DVBT_USB2_COLD], NULL },
    142			{ &a800_table[AVERMEDIA_DVBT_USB2_WARM], NULL },
    143		},
    144	}
    145};
    146
    147static struct usb_driver a800_driver = {
    148	.name		= "dvb_usb_a800",
    149	.probe		= a800_probe,
    150	.disconnect = dvb_usb_device_exit,
    151	.id_table	= a800_table,
    152};
    153
    154module_usb_driver(a800_driver);
    155
    156MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
    157MODULE_DESCRIPTION("AVerMedia AverTV DVB-T USB 2.0 (A800)");
    158MODULE_VERSION("1.0");
    159MODULE_LICENSE("GPL");