Merge pull request #3 from hgxl64/wait-write-timeout
wait for eeprom write to complete
This commit is contained in:
commit
fd58aaae76
5 changed files with 58 additions and 395 deletions
22
24cXX.c
22
24cXX.c
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@ -72,7 +72,7 @@ int eeprom_open(char *dev_fqn, int addr, int type, struct eeprom* e)
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int funcs, fd, r;
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e->fd = e->addr = 0;
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e->dev = 0;
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fd = open(dev_fqn, O_RDWR);
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if(fd <= 0)
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{
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@ -87,8 +87,9 @@ int eeprom_open(char *dev_fqn, int addr, int type, struct eeprom* e)
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return -1;
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}
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// check for req funcs
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CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_QUICK );
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CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_READ_BYTE );
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CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_WRITE_BYTE );
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CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_READ_BYTE_DATA );
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@ -179,11 +180,24 @@ int eeprom_write_byte(struct eeprom *e, __u16 mem_addr, __u8 data)
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__u8 buf[2] = { mem_addr & 0x00ff, data };
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return i2c_write_2b(e, buf);
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} else if(e->type == EEPROM_TYPE_16BIT_ADDR) {
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__u8 buf[3] =
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__u8 buf[3] =
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{ (mem_addr >> 8) & 0x00ff, mem_addr & 0x00ff, data };
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return i2c_write_3b(e, buf);
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}
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}
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fprintf(stderr, "ERR: unknown eeprom type\n");
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return -1;
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}
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int eeprom_wait_ready(struct eeprom *e, int max_ms_to_wait)
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{
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while (max_ms_to_wait > 0) {
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int r = i2c_smbus_write_quick(e->fd, 0);
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if (r == 0) {
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return r;
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}
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usleep(1000);
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--max_ms_to_wait;
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}
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return -1;
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}
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18
24cXX.h
18
24cXX.h
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@ -15,7 +15,7 @@
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***************************************************************************/
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#ifndef _24CXX_H_
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#define _24CXX_H_
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#include "i2c-dev.h"
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#include <linux/i2c-dev.h>
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#define EEPROM_TYPE_UNKNOWN 0
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#define EEPROM_TYPE_8BIT_ADDR 1
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@ -35,24 +35,28 @@ struct eeprom
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*/
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int eeprom_open(char *dev_fqn, int addr, int type, struct eeprom*);
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/*
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* closees the eeprom device [e]
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* closees the eeprom device [e]
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*/
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int eeprom_close(struct eeprom *e);
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/*
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* read and returns the eeprom byte at memory address [mem_addr]
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* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
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* read and returns the eeprom byte at memory address [mem_addr]
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* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
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*/
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int eeprom_read_byte(struct eeprom* e, __u16 mem_addr);
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/*
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* read the current byte
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* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
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* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
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*/
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int eeprom_read_current_byte(struct eeprom *e);
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/*
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* writes [data] at memory address [mem_addr]
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* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
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* writes [data] at memory address [mem_addr]
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* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
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*/
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int eeprom_write_byte(struct eeprom *e, __u16 mem_addr, __u8 data);
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/*
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* wait for the eeprom to accept new commands, to be called after a write
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*/
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int eeprom_wait_ready(struct eeprom *e, int max_ms_to_wait);
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#endif
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2
Makefile
2
Makefile
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@ -3,7 +3,7 @@ CFLAGS=-g -I. -Wall -O2
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all: eeprog
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clean:
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rm -f eeprog *.o
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rm -f eeprog eeprog.o 24cXX.o
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eeprog: eeprog.o 24cXX.o
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50
eeprog.c
50
eeprog.c
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@ -34,22 +34,23 @@ int g_quiet;
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#define usage_if(a) do { do_usage_if( a , __LINE__); } while(0);
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void do_usage_if(int b, int line)
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{
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const static char *eeprog_usage =
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const static char *eeprog_usage =
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"eeprog " VERSION ", a 24Cxx EEPROM reader/writer\n"
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"Copyright (c) 2003-2004 by Stefano Barbato - All rights reserved.\n"
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"Usage: eeprog [-fqxdh] [-16|-8] [ -r addr[:count] | -w addr ] /dev/i2c-N i2c-address\n"
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"Usage: eeprog [-fqxdh] [-16|-8] [ -r addr[:count] | -w addr ] /dev/i2c-N i2c-address\n"
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"\n"
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" Address modes: \n"
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" -8 Use 8bit address mode for 24c0x...24C16 [default]\n"
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" -16 Use 16bit address mode for 24c32...24C256\n"
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" Actions: \n"
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" -r addr[:count] Read [count] (1 if omitted) bytes from [addr]\n"
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" and print them to the standard output\n"
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" -r addr[:count] Read [count] (1 if omitted) bytes from [addr]\n"
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" and print them to the standard output\n"
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" -w addr Write input (stdin) at address [addr] of the EEPROM\n"
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" -t n write timeout in ms (default 10)\n"
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" -h Print this help\n"
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" Options: \n"
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" -x Set hex output mode\n"
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" -d Dummy mode, display what *would* have been done\n"
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" -x Set hex output mode\n"
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" -d Dummy mode, display what *would* have been done\n"
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" -f Disable warnings and don't ask confirmation\n"
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" -q Quiet mode\n"
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"\n"
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@ -98,7 +99,7 @@ void parse_arg(char *arg, int* paddr, int *psize)
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int confirm_action()
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{
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fprintf(stderr,
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fprintf(stderr,
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"\n"
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"____________________________WARNING____________________________\n"
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"Erroneously writing to a system EEPROM (like DIMM SPD modules)\n"
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@ -115,7 +116,7 @@ int confirm_action()
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"\n"
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);
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getchar();
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return 1;
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return 1;
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}
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int read_from_eeprom(struct eeprom *e, int addr, int size, int hex)
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@ -126,12 +127,12 @@ int read_from_eeprom(struct eeprom *e, int addr, int size, int hex)
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die_if((ch = eeprom_read_byte(e, addr)) < 0, "read error");
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if(hex)
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{
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if( (i % 16) == 0 )
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if( (i % 16) == 0 )
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printf("\n %.4x| ", addr);
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else if( (i % 8) == 0 )
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else if( (i % 8) == 0 )
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printf(" ");
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printf("%.2x ", ch);
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} else
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} else
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putchar(ch);
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}
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if(hex)
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@ -140,7 +141,7 @@ int read_from_eeprom(struct eeprom *e, int addr, int size, int hex)
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return 0;
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}
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int write_to_eeprom(struct eeprom *e, int addr)
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int write_to_eeprom(struct eeprom *e, int addr, int timeout)
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{
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int c;
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while((c = getchar()) != EOF)
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@ -148,6 +149,7 @@ int write_to_eeprom(struct eeprom *e, int addr)
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print_info(".");
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fflush(stdout);
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die_if(eeprom_write_byte(e, addr++, c), "write error");
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die_if(eeprom_wait_ready(e, timeout), "write timeout");
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}
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print_info("\n\n");
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return 0;
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@ -157,6 +159,7 @@ int main(int argc, char** argv)
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{
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struct eeprom e;
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int ret, op, i2c_addr, memaddr, size, want_hex, dummy, force, sixteen;
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int timeout = 10;
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char *device, *arg = 0, *i2c_addr_s;
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struct stat st;
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int eeprom_type = 0;
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@ -164,14 +167,14 @@ int main(int argc, char** argv)
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op = want_hex = dummy = force = sixteen = 0;
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g_quiet = 0;
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while((ret = getopt(argc, argv, "1:8fr:qhw:xd")) != -1)
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while((ret = getopt(argc, argv, "1:8fr:qhw:xdt:")) != -1)
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{
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switch(ret)
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{
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case '1':
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usage_if(*optarg != '6' || strlen(optarg) != 1);
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die_if(eeprom_type, "EEPROM type switch (-8 or -16) used twice");
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eeprom_type = EEPROM_TYPE_16BIT_ADDR;
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eeprom_type = EEPROM_TYPE_16BIT_ADDR;
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break;
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case 'x':
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want_hex++;
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@ -192,8 +195,11 @@ int main(int argc, char** argv)
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case 'h':
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usage_if(1);
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break;
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case 't':
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timeout = atoi(optarg);
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break;
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default:
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die_if(op != 0, "Both read and write requested");
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die_if(op != 0, "Both read and write requested");
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arg = optarg;
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op = ret;
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}
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@ -201,7 +207,7 @@ int main(int argc, char** argv)
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if(!eeprom_type)
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eeprom_type = EEPROM_TYPE_8BIT_ADDR; // default
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usage_if(op == 0); // no switches
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usage_if(op == 0); // no switches
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// set device and i2c_addr reading from cmdline or env
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device = i2c_addr_s = 0;
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switch(argc - optind)
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@ -232,15 +238,15 @@ int main(int argc, char** argv)
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print_info("eeprog %s, a 24Cxx EEPROM reader/writer\n", VERSION);
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print_info("Copyright (c) 2003-2004 by Stefano Barbato - All rights reserved.\n");
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print_info(" Bus: %s, Address: 0x%x, Mode: %dbit\n",
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device, i2c_addr,
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print_info(" Bus: %s, Address: 0x%x, Mode: %dbit\n",
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device, i2c_addr,
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(eeprom_type == EEPROM_TYPE_8BIT_ADDR ? 8 : 16) );
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if(dummy)
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{
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fprintf(stderr, "Dummy mode selected, nothing done.\n");
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return 0;
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}
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die_if(eeprom_open(device, i2c_addr, eeprom_type, &e) < 0,
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die_if(eeprom_open(device, i2c_addr, eeprom_type, &e) < 0,
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"unable to open eeprom device file "
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"(check that the file exists and that it's readable)");
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switch(op)
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@ -257,9 +263,9 @@ int main(int argc, char** argv)
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if(force == 0)
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confirm_action();
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parse_arg(arg, &memaddr, &size);
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print_info(" Writing stdin starting at address 0x%x\n",
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memaddr);
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write_to_eeprom(&e, memaddr);
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print_info(" Writing stdin starting at address 0x%x with timeout %dms\n",
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memaddr, timeout);
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write_to_eeprom(&e, memaddr, timeout);
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break;
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default:
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usage_if(1);
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361
i2c-dev.h
361
i2c-dev.h
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@ -1,361 +0,0 @@
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/*
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i2c-dev.h - i2c-bus driver, char device interface
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Copyright (C) 1995-97 Simon G. Vogl
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Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: i2c-dev.h,v 1.4 2003/11/27 23:08:06 tat Exp $ */
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#ifndef LIB_I2CDEV_H
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#define LIB_I2CDEV_H
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#include <linux/types.h>
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#include <sys/ioctl.h>
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/* -- i2c.h -- */
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/*
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* I2C Message - used for pure i2c transaction, also from /dev interface
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*/
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struct i2c_msg {
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__u16 addr; /* slave address */
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unsigned short flags;
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#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
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#define I2C_M_RD 0x01
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#define I2C_M_NOSTART 0x4000
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#define I2C_M_REV_DIR_ADDR 0x2000
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#define I2C_M_IGNORE_NAK 0x1000
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#define I2C_M_NO_RD_ACK 0x0800
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short len; /* msg length */
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char *buf; /* pointer to msg data */
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int err;
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short done;
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};
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/* To determine what functionality is present */
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#define I2C_FUNC_I2C 0x00000001
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#define I2C_FUNC_10BIT_ADDR 0x00000002
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#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
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#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_QUICK 0x00010000
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#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
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#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
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#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
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#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
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#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
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#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
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#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
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#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
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#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
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#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
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#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
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#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
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#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
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#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
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I2C_FUNC_SMBUS_WRITE_BYTE
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#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
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I2C_FUNC_SMBUS_WRITE_BYTE_DATA
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#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
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I2C_FUNC_SMBUS_WRITE_WORD_DATA
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#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
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#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
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I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
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#define I2C_FUNC_SMBUS_I2C_BLOCK_2 I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
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I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2
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#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC
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#define I2C_FUNC_SMBUS_WORD_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
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I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC
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#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
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#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
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#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
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#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
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#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
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#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
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#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
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I2C_FUNC_SMBUS_BYTE | \
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I2C_FUNC_SMBUS_BYTE_DATA | \
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I2C_FUNC_SMBUS_WORD_DATA | \
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I2C_FUNC_SMBUS_PROC_CALL | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
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I2C_FUNC_SMBUS_I2C_BLOCK
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/*
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* Data for SMBus Messages
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*/
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#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
|
||||
#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
|
||||
union i2c_smbus_data {
|
||||
__u8 byte;
|
||||
__u16 word;
|
||||
__u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
|
||||
/* one more for read length in block process call */
|
||||
/* and one more for PEC */
|
||||
};
|
||||
|
||||
/* smbus_access read or write markers */
|
||||
#define I2C_SMBUS_READ 1
|
||||
#define I2C_SMBUS_WRITE 0
|
||||
|
||||
/* SMBus transaction types (size parameter in the above functions)
|
||||
Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
|
||||
#define I2C_SMBUS_QUICK 0
|
||||
#define I2C_SMBUS_BYTE 1
|
||||
#define I2C_SMBUS_BYTE_DATA 2
|
||||
#define I2C_SMBUS_WORD_DATA 3
|
||||
#define I2C_SMBUS_PROC_CALL 4
|
||||
#define I2C_SMBUS_BLOCK_DATA 5
|
||||
#define I2C_SMBUS_I2C_BLOCK_DATA 6
|
||||
#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
|
||||
#define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */
|
||||
#define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */
|
||||
#define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */
|
||||
#define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */
|
||||
|
||||
|
||||
/* ----- commands for the ioctl like i2c_command call:
|
||||
* note that additional calls are defined in the algorithm and hw
|
||||
* dependent layers - these can be listed here, or see the
|
||||
* corresponding header files.
|
||||
*/
|
||||
/* -> bit-adapter specific ioctls */
|
||||
#define I2C_RETRIES 0x0701 /* number of times a device address */
|
||||
/* should be polled when not */
|
||||
/* acknowledging */
|
||||
#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
|
||||
|
||||
|
||||
/* this is for i2c-dev.c */
|
||||
#define I2C_SLAVE 0x0703 /* Change slave address */
|
||||
/* Attn.: Slave address is 7 or 10 bits */
|
||||
#define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
|
||||
/* Attn.: Slave address is 7 or 10 bits */
|
||||
/* This changes the address, even if it */
|
||||
/* is already taken! */
|
||||
#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
|
||||
|
||||
#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
|
||||
#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
|
||||
#define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
|
||||
#if 0
|
||||
#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
|
||||
#endif
|
||||
|
||||
#define I2C_SMBUS 0x0720 /* SMBus-level access */
|
||||
|
||||
/* -- i2c.h -- */
|
||||
|
||||
|
||||
/* Note: 10-bit addresses are NOT supported! */
|
||||
|
||||
/* This is the structure as used in the I2C_SMBUS ioctl call */
|
||||
struct i2c_smbus_ioctl_data {
|
||||
char read_write;
|
||||
__u8 command;
|
||||
int size;
|
||||
union i2c_smbus_data *data;
|
||||
};
|
||||
|
||||
/* This is the structure as used in the I2C_RDWR ioctl call */
|
||||
struct i2c_rdwr_ioctl_data {
|
||||
struct i2c_msg *msgs; /* pointers to i2c_msgs */
|
||||
int nmsgs; /* number of i2c_msgs */
|
||||
};
|
||||
|
||||
|
||||
static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command,
|
||||
int size, union i2c_smbus_data *data)
|
||||
{
|
||||
struct i2c_smbus_ioctl_data args;
|
||||
|
||||
args.read_write = read_write;
|
||||
args.command = command;
|
||||
args.size = size;
|
||||
args.data = data;
|
||||
return ioctl(file,I2C_SMBUS,&args);
|
||||
}
|
||||
|
||||
|
||||
static inline __s32 i2c_smbus_write_quick(int file, __u8 value)
|
||||
{
|
||||
return i2c_smbus_access(file,value,0,I2C_SMBUS_QUICK,NULL);
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_read_byte(int file)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,0,I2C_SMBUS_BYTE,&data))
|
||||
return -1;
|
||||
else
|
||||
return 0x0FF & data.byte;
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_byte(int file, __u8 value)
|
||||
{
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,value,
|
||||
I2C_SMBUS_BYTE,NULL);
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_read_byte_data(int file, __u8 command)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
|
||||
I2C_SMBUS_BYTE_DATA,&data))
|
||||
return -1;
|
||||
else
|
||||
return 0x0FF & data.byte;
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_byte_data(int file, __u8 command,
|
||||
__u8 value)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
data.byte = value;
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_BYTE_DATA, &data);
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_read_word_data(int file, __u8 command)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
|
||||
I2C_SMBUS_WORD_DATA,&data))
|
||||
return -1;
|
||||
else
|
||||
return 0x0FFFF & data.word;
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_word_data(int file, __u8 command,
|
||||
__u16 value)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
data.word = value;
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_WORD_DATA, &data);
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
data.word = value;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_PROC_CALL,&data))
|
||||
return -1;
|
||||
else
|
||||
return 0x0FFFF & data.word;
|
||||
}
|
||||
|
||||
|
||||
/* Returns the number of read bytes */
|
||||
static inline __s32 i2c_smbus_read_block_data(int file, __u8 command,
|
||||
__u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
|
||||
I2C_SMBUS_BLOCK_DATA,&data))
|
||||
return -1;
|
||||
else {
|
||||
for (i = 1; i <= data.block[0]; i++)
|
||||
values[i-1] = data.block[i];
|
||||
return data.block[0];
|
||||
}
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_block_data(int file, __u8 command,
|
||||
__u8 length, __u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (length > 32)
|
||||
length = 32;
|
||||
for (i = 1; i <= length; i++)
|
||||
data.block[i] = values[i-1];
|
||||
data.block[0] = length;
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_BLOCK_DATA, &data);
|
||||
}
|
||||
|
||||
/* Returns the number of read bytes */
|
||||
static inline __s32 i2c_smbus_read_i2c_block_data(int file, __u8 command,
|
||||
__u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
|
||||
I2C_SMBUS_I2C_BLOCK_DATA,&data))
|
||||
return -1;
|
||||
else {
|
||||
for (i = 1; i <= data.block[0]; i++)
|
||||
values[i-1] = data.block[i];
|
||||
return data.block[0];
|
||||
}
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_i2c_block_data(int file, __u8 command,
|
||||
__u8 length, __u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (length > 32)
|
||||
length = 32;
|
||||
for (i = 1; i <= length; i++)
|
||||
data.block[i] = values[i-1];
|
||||
data.block[0] = length;
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_I2C_BLOCK_DATA, &data);
|
||||
}
|
||||
|
||||
/* Returns the number of read bytes */
|
||||
static inline __s32 i2c_smbus_block_process_call(int file, __u8 command,
|
||||
__u8 length, __u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (length > 32)
|
||||
length = 32;
|
||||
for (i = 1; i <= length; i++)
|
||||
data.block[i] = values[i-1];
|
||||
data.block[0] = length;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_BLOCK_PROC_CALL,&data))
|
||||
return -1;
|
||||
else {
|
||||
for (i = 1; i <= data.block[0]; i++)
|
||||
values[i-1] = data.block[i];
|
||||
return data.block[0];
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#endif /* LIB_I2CDEV_H */
|
Loading…
Reference in a new issue