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f0b0ada718
The USB control messages require DMA to work. We cannot pass a stack-allocated buffer, as it is not warranted that the stack would be into a DMA enabled area. Reviewed-by: Patrick Boettcher <patrick.boettcher@posteo.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
#ifndef _DVB_USB_DIGITV_H_
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#define _DVB_USB_DIGITV_H_
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#define DVB_USB_LOG_PREFIX "digitv"
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#include "dvb-usb.h"
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struct digitv_state {
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int is_nxt6000;
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unsigned char sndbuf[7];
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unsigned char rcvbuf[7];
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};
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/* protocol (from usblogging and the SDK:
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*
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* Always 7 bytes bulk message(s) for controlling
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*
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* First byte describes the command. Reads are 2 consecutive transfer (as always).
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*
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* General structure:
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*
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* write or first message of a read:
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* <cmdbyte> VV <len> B0 B1 B2 B3
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*
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* second message of a read
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* <cmdbyte> VV <len> R0 R1 R2 R3
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*
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* whereas 0 < len <= 4
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*
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* I2C address is stored somewhere inside the device.
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*
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* 0x01 read from EEPROM
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* VV = offset; B* = 0; R* = value(s)
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*
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* 0x02 read register of the COFDM
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* VV = register; B* = 0; R* = value(s)
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*
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* 0x05 write register of the COFDM
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* VV = register; B* = value(s);
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*
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* 0x06 write to the tuner (only for NXT6000)
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* VV = 0; B* = PLL data; len = 4;
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*
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* 0x03 read remote control
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* VV = 0; B* = 0; len = 4; R* = key
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*
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* 0x07 write to the remote (don't know why one should this, resetting ?)
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* VV = 0; B* = key; len = 4;
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*
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* 0x08 write remote type
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* VV = 0; B[0] = 0x01, len = 4
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*
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* 0x09 write device init
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* TODO
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*/
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#define USB_READ_EEPROM 1
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#define USB_READ_COFDM 2
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#define USB_WRITE_COFDM 5
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#define USB_WRITE_TUNER 6
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#define USB_READ_REMOTE 3
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#define USB_WRITE_REMOTE 7
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#define USB_WRITE_REMOTE_TYPE 8
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#define USB_DEV_INIT 9
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#endif
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