ipath_eeprom.c File Reference

#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
#include "ipath_kernel.h"

Go to the source code of this file.

Data Structures
struct	i2c_chain_desc

Macros
#define	IPATH_EEPROM_DEV_V1   0xA0
#define	IPATH_EEPROM_DEV_V2   0xA2
#define	IPATH_TEMP_DEV   0x98
#define	IPATH_BAD_DEV   (IPATH_EEPROM_DEV_V2+2)
#define	IPATH_NO_DEV   (0xFF)
#define	READ_CMD   1
#define	WRITE_CMD   0
#define	VALID_TS_RD_REG_MASK   0xBF
#define	VALID_TS_WR_REG_MASK   ((1 << 9) | (1 << 0xB) | (1 << 0xD))

Enumerations
enum	i2c_type { i2c_line_scl = 0, i2c_line_sda }
enum	i2c_state { i2c_line_low = 0, i2c_line_high }

Functions
int	ipath_eeprom_read (struct ipath_devdata *dd, u8 eeprom_offset, void *buff, int len)
int	ipath_eeprom_write (struct ipath_devdata *dd, u8 eeprom_offset, const void *buff, int len)
void	ipath_get_eeprom_info (struct ipath_devdata *dd)
int	ipath_update_eeprom_log (struct ipath_devdata *dd)
void	ipath_inc_eeprom_err (struct ipath_devdata *dd, u32 eidx, u32 incr)
int	ipath_tempsense_read (struct ipath_devdata *dd, u8 regnum)
int	ipath_tempsense_write (struct ipath_devdata *dd, u8 regnum, u8 data)

Macro Definition Documentation

#define IPATH_BAD_DEV   (IPATH_EEPROM_DEV_V2+2)

Definition at line 69 of file ipath_eeprom.c.

#define IPATH_EEPROM_DEV_V1   0xA0

Definition at line 66 of file ipath_eeprom.c.

#define IPATH_EEPROM_DEV_V2   0xA2

Definition at line 67 of file ipath_eeprom.c.

#define IPATH_NO_DEV   (0xFF)

Definition at line 70 of file ipath_eeprom.c.

#define IPATH_TEMP_DEV   0x98

Definition at line 68 of file ipath_eeprom.c.

#define READ_CMD   1

Definition at line 102 of file ipath_eeprom.c.

#define VALID_TS_RD_REG_MASK   0xBF

Definition at line 1076 of file ipath_eeprom.c.

#define VALID_TS_WR_REG_MASK   ((1 << 9) | (1 << 0xB) | (1 << 0xD))

Definition at line 1153 of file ipath_eeprom.c.

#define WRITE_CMD   0

Definition at line 103 of file ipath_eeprom.c.

Enumeration Type Documentation

enum i2c_state

Enumerator:

i2c_line_low
i2c_line_high

Definition at line 97 of file ipath_eeprom.c.

enum i2c_type

Enumerator:

i2c_line_scl
i2c_line_sda

Definition at line 92 of file ipath_eeprom.c.

Function Documentation

int ipath_eeprom_read	(	struct ipath_devdata *	dd,
		u8	eeprom_offset,
		void *	buff,
		int	len
	)

ipath_eeprom_read - receives bytes from the eeprom via I2C : the infinipath device : address to read from : where to store result : number of bytes to receive

Definition at line 641 of file ipath_eeprom.c.

int ipath_eeprom_write	(	struct ipath_devdata *	dd,
		u8	eeprom_offset,
		const void *	buff,
		int	len
	)

ipath_eeprom_write - writes data to the eeprom via I2C : the infinipath device : where to place data : data to write : number of bytes to write

Definition at line 662 of file ipath_eeprom.c.

void ipath_get_eeprom_info

(

struct ipath_devdata *

dd

)

ipath_get_guid - get the GUID from the i2c device : the infinipath device

We have the capability to use the ipath_nguid field, and get the guid from the first chip's flash, to use for all of them.

Definition at line 706 of file ipath_eeprom.c.

void ipath_inc_eeprom_err	(	struct ipath_devdata *	dd,
		u32	eidx,
		u32	incr
	)

ipath_inc_eeprom_err - increment one of the four error counters that are logged to EEPROM. : the infinipath device : 0..3, the counter to increment : how much to add

Each counter is 8-bits, and saturates at 255 (0xFF). They are copied to the EEPROM (aka flash) whenever ipath_update_eeprom_log() is called, but it can only be called in a context that allows sleep. This function can be called even at interrupt level.

Definition at line 1015 of file ipath_eeprom.c.

int ipath_tempsense_read	(	struct ipath_devdata *	dd,
		u8	regnum
	)

ipath_tempsense_read - read register of temp sensor via I2C : the infinipath device : register to read from

returns reg contents (0..255) or < 0 for error

Definition at line 1085 of file ipath_eeprom.c.

int ipath_tempsense_write	(	struct ipath_devdata *	dd,
		u8	regnum,
		u8	data
	)

ipath_tempsense_write - write register of temp sensor via I2C : the infinipath device : register to write : data to write

returns 0 for success or < 0 for error

Definition at line 1163 of file ipath_eeprom.c.

int ipath_update_eeprom_log

(

struct ipath_devdata *

dd

)

ipath_update_eeprom_log - copy active-time and error counters to eeprom : the infinipath device

Although the time is kept as seconds in the ipath_devdata struct, it is rounded to hours for re-write, as we have only 16 bits in EEPROM. First-cut code reads whole (expected) struct ipath_flash, modifies, re-writes. Future direction: read/write only what we need, assuming that the EEPROM had to have been "good enough" for driver init, and if not, we aren't making it worse.

Definition at line 865 of file ipath_eeprom.c.