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