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Diffstat (limited to 'drivers/media/usb/dvb-usb/m920x.h')
-rw-r--r--drivers/media/usb/dvb-usb/m920x.h77
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/m920x.h b/drivers/media/usb/dvb-usb/m920x.h
new file mode 100644
index 000000000000..3c061518ffc1
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/m920x.h
@@ -0,0 +1,77 @@
+#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