1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _DVB_USB_M920X_H_ 3#define _DVB_USB_M920X_H_ 4 5#define DVB_USB_LOG_PREFIX "m920x" 6#include "dvb-usb.h" 7 8#define deb(args...) dprintk(dvb_usb_m920x_debug,0x01,args) 9 10#define M9206_CORE 0x22 11#define M9206_RC_STATE 0xff51 12#define M9206_RC_KEY 0xff52 13#define M9206_RC_INIT1 0xff54 14#define M9206_RC_INIT2 0xff55 15#define M9206_FW_GO 0xff69 16 17#define M9206_I2C 0x23 18#define M9206_FILTER 0x25 19#define M9206_FW 0x30 20 21#define M9206_MAX_FILTERS 8 22#define M9206_MAX_ADAPTERS 4 23 24/* 25sequences found in logs: 26[index value] 270x80 write addr 28(0x00 out byte)* 290x40 out byte 30 310x80 write addr 32(0x00 out byte)* 330x80 read addr 34(0x21 in byte)* 350x60 in byte 36 37this sequence works: 380x80 read addr 39(0x21 in byte)* 400x60 in byte 41 42Guess at API of the I2C function: 43I2C operation is done one byte at a time with USB control messages. The 44index the messages is sent to is made up of a set of flags that control 45the I2C bus state: 460x80: Send START condition. After a START condition, one would normally 47 always send the 7-bit slave I2C address as the 7 MSB, followed by 48 the read/write bit as the LSB. 490x40: Send STOP condition. This should be set on the last byte of an 50 I2C transaction. 510x20: Read a byte from the slave. As opposed to writing a byte to the 52 slave. The slave will normally not produce any data unless you 53 set the R/W bit to 1 when sending the slave's address after the 54 START condition. 550x01: Respond with ACK, as opposed to a NACK. For a multi-byte read, 56 the master should send an ACK, that is pull SDA low during the 9th 57 clock cycle, after every byte but the last. This flags only makes 58 sense when bit 0x20 is set, indicating a read. 59 60What any other bits might mean, or how to get the slave's ACK/NACK 61response to a write, is unknown. 62*/ 63 64struct m920x_state { 65 u16 filters[M9206_MAX_ADAPTERS][M9206_MAX_FILTERS]; 66 int filtering_enabled[M9206_MAX_ADAPTERS]; 67 int rep_count; 68}; 69 70/* Initialisation data for the m920x 71 */ 72 73struct m920x_inits { 74 u16 address; 75 u8 data; 76}; 77 78#endif 79