| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _DVB_USB_M920X_H_ |
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| 3 | #define _DVB_USB_M920X_H_ |
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| 4 | |
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| 5 | #define DVB_USB_LOG_PREFIX "m920x" |
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| 6 | #include "dvb-usb.h" |
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| 7 | |
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| 8 | #define deb(args...) dprintk(dvb_usb_m920x_debug,0x01,args) |
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| 9 | |
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| 10 | #define M9206_CORE 0x22 |
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| 11 | #define M9206_RC_STATE 0xff51 |
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| 12 | #define M9206_RC_KEY 0xff52 |
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| 13 | #define M9206_RC_INIT1 0xff54 |
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| 14 | #define M9206_RC_INIT2 0xff55 |
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| 15 | #define M9206_FW_GO 0xff69 |
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| 16 | |
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| 17 | #define M9206_I2C 0x23 |
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| 18 | #define M9206_FILTER 0x25 |
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| 19 | #define M9206_FW 0x30 |
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| 20 | |
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| 21 | #define M9206_MAX_FILTERS 8 |
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| 22 | #define M9206_MAX_ADAPTERS 4 |
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| 23 | |
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| 24 | /* |
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| 25 | sequences found in logs: |
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| 26 | [index value] |
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| 27 | 0x80 write addr |
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| 28 | (0x00 out byte)* |
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| 29 | 0x40 out byte |
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| 30 | |
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| 31 | 0x80 write addr |
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| 32 | (0x00 out byte)* |
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| 33 | 0x80 read addr |
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| 34 | (0x21 in byte)* |
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| 35 | 0x60 in byte |
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| 36 | |
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| 37 | this sequence works: |
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| 38 | 0x80 read addr |
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| 39 | (0x21 in byte)* |
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| 40 | 0x60 in byte |
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| 41 | |
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| 42 | Guess at API of the I2C function: |
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| 43 | I2C operation is done one byte at a time with USB control messages. The |
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| 44 | index the messages is sent to is made up of a set of flags that control |
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| 45 | the I2C bus state: |
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| 46 | 0x80: Send START condition. After a START condition, one would normally |
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| 47 | always send the 7-bit slave I2C address as the 7 MSB, followed by |
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| 48 | the read/write bit as the LSB. |
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| 49 | 0x40: Send STOP condition. This should be set on the last byte of an |
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| 50 | I2C transaction. |
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| 51 | 0x20: Read a byte from the slave. As opposed to writing a byte to the |
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| 52 | slave. The slave will normally not produce any data unless you |
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| 53 | set the R/W bit to 1 when sending the slave's address after the |
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| 54 | START condition. |
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| 55 | 0x01: Respond with ACK, as opposed to a NACK. For a multi-byte read, |
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| 56 | the master should send an ACK, that is pull SDA low during the 9th |
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| 57 | clock cycle, after every byte but the last. This flags only makes |
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| 58 | sense when bit 0x20 is set, indicating a read. |
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| 59 | |
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| 60 | What any other bits might mean, or how to get the slave's ACK/NACK |
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| 61 | response to a write, is unknown. |
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| 62 | */ |
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| 63 | |
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| 64 | struct m920x_state { |
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| 65 | u16 filters[M9206_MAX_ADAPTERS][M9206_MAX_FILTERS]; |
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| 66 | int filtering_enabled[M9206_MAX_ADAPTERS]; |
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| 67 | int rep_count; |
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| 68 | }; |
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| 69 | |
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| 70 | /* Initialisation data for the m920x |
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| 71 | */ |
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| 72 | |
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| 73 | struct m920x_inits { |
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| 74 | u16 address; |
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| 75 | u8 data; |
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| 76 | }; |
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| 77 | |
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| 78 | #endif |
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| 79 | |
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