79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _DVB_USB_M920X_H_
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#define _DVB_USB_M920X_H_
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#define DVB_USB_LOG_PREFIX "m920x"
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#include "dvb-usb.h"
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#define deb(args...) dprintk(dvb_usb_m920x_debug,0x01,args)
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#define M9206_CORE 0x22
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#define M9206_RC_STATE 0xff51
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#define M9206_RC_KEY 0xff52
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#define M9206_RC_INIT1 0xff54
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#define M9206_RC_INIT2 0xff55
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#define M9206_FW_GO 0xff69
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#define M9206_I2C 0x23
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#define M9206_FILTER 0x25
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#define M9206_FW 0x30
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#define M9206_MAX_FILTERS 8
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#define M9206_MAX_ADAPTERS 4
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/*
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sequences found in logs:
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[index value]
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0x80 write addr
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(0x00 out byte)*
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0x40 out byte
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0x80 write addr
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(0x00 out byte)*
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0x80 read addr
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(0x21 in byte)*
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0x60 in byte
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this sequence works:
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0x80 read addr
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(0x21 in byte)*
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0x60 in byte
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Guess at API of the I2C function:
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I2C operation is done one byte at a time with USB control messages. The
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index the messages is sent to is made up of a set of flags that control
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the I2C bus state:
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0x80: Send START condition. After a START condition, one would normally
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always send the 7-bit slave I2C address as the 7 MSB, followed by
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the read/write bit as the LSB.
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0x40: Send STOP condition. This should be set on the last byte of an
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I2C transaction.
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0x20: Read a byte from the slave. As opposed to writing a byte to the
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slave. The slave will normally not produce any data unless you
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set the R/W bit to 1 when sending the slave's address after the
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START condition.
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0x01: Respond with ACK, as opposed to a NACK. For a multi-byte read,
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the master should send an ACK, that is pull SDA low during the 9th
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clock cycle, after every byte but the last. This flags only makes
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sense when bit 0x20 is set, indicating a read.
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What any other bits might mean, or how to get the slave's ACK/NACK
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response to a write, is unknown.
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*/
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struct m920x_state {
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u16 filters[M9206_MAX_ADAPTERS][M9206_MAX_FILTERS];
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int filtering_enabled[M9206_MAX_ADAPTERS];
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int rep_count;
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};
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/* Initialisation data for the m920x
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*/
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struct m920x_inits {
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u16 address;
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u8 data;
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};
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#endif
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