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 /*
25 sequences found in logs:
26 [index value]
27 0x80 write addr
28 (0x00 out byte)*
29 0x40 out byte
30
31 0x80 write addr
32 (0x00 out byte)*
33 0x80 read addr
34 (0x21 in byte)*
35 0x60 in byte
36
37 this sequence works:
38 0x80 read addr
39 (0x21 in byte)*
40 0x60 in byte
41
42 Guess at API of the I2C function:
43 I2C operation is done one byte at a time with USB control messages. The
44 index the messages is sent to is made up of a set of flags that control
45 the I2C bus state:
46 0x80: 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.
49 0x40: Send STOP condition. This should be set on the last byte of an
50 I2C transaction.
51 0x20: 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.
55 0x01: 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
60 What any other bits might mean, or how to get the slave's ACK/NACK
61 response to a write, is unknown.
62 */
63
64 struct 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
73 struct m920x_inits {
74 u16 address;
75 u8 data;
76 };
77
78 #endif