From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- drivers/media/usb/dvb-usb/m920x.h | 78 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 drivers/media/usb/dvb-usb/m920x.h (limited to 'drivers/media/usb/dvb-usb/m920x.h') diff --git a/drivers/media/usb/dvb-usb/m920x.h b/drivers/media/usb/dvb-usb/m920x.h new file mode 100644 index 000000000..bab3c6ac7 --- /dev/null +++ b/drivers/media/usb/dvb-usb/m920x.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _DVB_USB_M920X_H_ +#define _DVB_USB_M920X_H_ + +#define DVB_USB_LOG_PREFIX "m920x" +#include "dvb-usb.h" + +#define deb(args...) dprintk(dvb_usb_m920x_debug,0x01,args) + +#define M9206_CORE 0x22 +#define M9206_RC_STATE 0xff51 +#define M9206_RC_KEY 0xff52 +#define M9206_RC_INIT1 0xff54 +#define M9206_RC_INIT2 0xff55 +#define M9206_FW_GO 0xff69 + +#define M9206_I2C 0x23 +#define M9206_FILTER 0x25 +#define M9206_FW 0x30 + +#define M9206_MAX_FILTERS 8 +#define M9206_MAX_ADAPTERS 4 + +/* +sequences found in logs: +[index value] +0x80 write addr +(0x00 out byte)* +0x40 out byte + +0x80 write addr +(0x00 out byte)* +0x80 read addr +(0x21 in byte)* +0x60 in byte + +this sequence works: +0x80 read addr +(0x21 in byte)* +0x60 in byte + +Guess at API of the I2C function: +I2C operation is done one byte at a time with USB control messages. The +index the messages is sent to is made up of a set of flags that control +the I2C bus state: +0x80: Send START condition. After a START condition, one would normally + always send the 7-bit slave I2C address as the 7 MSB, followed by + the read/write bit as the LSB. +0x40: Send STOP condition. This should be set on the last byte of an + I2C transaction. +0x20: Read a byte from the slave. As opposed to writing a byte to the + slave. The slave will normally not produce any data unless you + set the R/W bit to 1 when sending the slave's address after the + START condition. +0x01: Respond with ACK, as opposed to a NACK. For a multi-byte read, + the master should send an ACK, that is pull SDA low during the 9th + clock cycle, after every byte but the last. This flags only makes + sense when bit 0x20 is set, indicating a read. + +What any other bits might mean, or how to get the slave's ACK/NACK +response to a write, is unknown. +*/ + +struct m920x_state { + u16 filters[M9206_MAX_ADAPTERS][M9206_MAX_FILTERS]; + int filtering_enabled[M9206_MAX_ADAPTERS]; + int rep_count; +}; + +/* Initialisation data for the m920x + */ + +struct m920x_inits { + u16 address; + u8 data; +}; + +#endif -- cgit v1.2.3