drivers/media/usb/dvb-usb/ttusb2.h

Source file repositories/reference/linux-study-clean/drivers/media/usb/dvb-usb/ttusb2.h

File Facts

System: Linux kernel
Corpus path: drivers/media/usb/dvb-usb/ttusb2.h
Extension: .h
Size: 1812 bytes
Lines: 68
Domain: Driver Families
Bucket: drivers/media
Inferred role: Driver Families: implementation source
Status: source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef _DVB_USB_TTUSB2_H_
#define _DVB_USB_TTUSB2_H_

/* TTUSB protocol
 *
 * always to messages (out/in)
 * out message:
 * 0xaa <id> <cmdbyte> <datalen> <data...>
 *
 * in message (complete block is always 0x40 bytes long)
 * 0x55 <id> <cmdbyte> <datalen> <data...>
 *
 * id is incremented for each transaction
 */

#define CMD_DSP_DOWNLOAD    0x13
/* out data: <byte>[28]
 * last block must be empty */

#define CMD_DSP_BOOT        0x14
/* out data: nothing */

#define CMD_POWER           0x15
/* out data: <on=1/off=0> */

#define CMD_LNB             0x16
/* out data: <power=1> <18V=0,13V=1> <tone> <??=1> <??=1> */

#define CMD_GET_VERSION     0x17
/* in  data: <version_byte>[5] */

#define CMD_DISEQC          0x18
/* out data: <master=0xff/burst=??> <cmdlen> <cmdbytes>[cmdlen] */

#define CMD_PID_ENABLE      0x22
/* out data: <index> <type: ts=1/sec=2> <pid msb> <pid lsb> */

#define CMD_PID_DISABLE     0x23
/* out data: <index> */

#define CMD_FILTER_ENABLE   0x24
/* out data: <index> <pid_idx> <filter>[12] <mask>[12] */

#define CMD_FILTER_DISABLE  0x25
/* out data: <index> */

#define CMD_GET_DSP_VERSION 0x26
/* in  data: <version_byte>[28] */

#define CMD_I2C_XFER        0x31
/* out data: <addr << 1> <sndlen> <rcvlen> <data>[sndlen]
 * in  data: <addr << 1> <sndlen> <rcvlen> <data>[rcvlen] */

#define CMD_I2C_BITRATE     0x32
/* out data: <default=0> */

#endif

Annotation

Atlas domain: Driver Families / drivers/media.
Implementation status: source implementation candidate.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.