From f868cc5a50757d94f36c312395481cb0f187d9e6 Mon Sep 17 00:00:00 2001 From: Jean-Christophe PLAGNIOL-VILLARD Date: Sat, 24 Nov 2007 20:14:44 +0100 Subject: drivers/hwmon : move hardware monitor drviers to drivers/hwmon Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- dtt/ds1621.c | 190 ----------------------------------------------------------- 1 file changed, 190 deletions(-) delete mode 100644 dtt/ds1621.c (limited to 'dtt/ds1621.c') diff --git a/dtt/ds1621.c b/dtt/ds1621.c deleted file mode 100644 index 494818131f..0000000000 --- a/dtt/ds1621.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * (C) Copyright 2001 - * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -/* - * Dallas Semiconductor's DS1621 Digital Thermometer and Thermostat. - */ - -#include - -#ifdef CONFIG_DTT_DS1621 -#if !defined(CFG_EEPROM_PAGE_WRITE_ENABLE) || \ - (CFG_EEPROM_PAGE_WRITE_BITS < 1) -# error "CFG_EEPROM_PAGE_WRITE_ENABLE must be defined and CFG_EEPROM_PAGE_WRITE_BITS must be greater than 1 to use CONFIG_DTT_DS1621" -#endif -#include -#include - -/* - * Device code - */ -#define DTT_I2C_DEV_CODE 0x48 /* Dallas Semi's DS1621 */ - -int dtt_read(int sensor, int reg) -{ - int dlen; - uchar data[2]; - - /* - * Calculate sensor address and command. - * - */ - sensor = DTT_I2C_DEV_CODE + (sensor & 0x07); /* Calculate addr of ds1621*/ - - /* - * Prepare to handle 2 byte result. - */ - if ((reg == DTT_READ_TEMP) || - (reg == DTT_TEMP_HIGH) || (reg == DTT_TEMP_LOW)) - dlen = 2; - else - dlen = 1; - - /* - * Now try to read the register. - */ - if (i2c_read(sensor, reg, 1, data, dlen) != 0) - return 1; - - /* - * Handle 2 byte result. - */ - if (dlen == 2) - return ((int)((short)data[1] + (((short)data[0]) << 8))); - - return (int)data[0]; -} /* dtt_read() */ - - -int dtt_write(int sensor, int reg, int val) -{ - int dlen; - uchar data[2]; - - /* - * Calculate sensor address and register. - * - */ - sensor = DTT_I2C_DEV_CODE + (sensor & 0x07); - - /* - * Handle various data sizes. - */ - if ((reg == DTT_READ_TEMP) || - (reg == DTT_TEMP_HIGH) || (reg == DTT_TEMP_LOW)) { - dlen = 2; - data[0] = (char)((val >> 8) & 0xff); /* MSB first */ - data[1] = (char)(val & 0xff); - } - else if ((reg == DTT_WRITE_START_CONV) || (reg == DTT_WRITE_STOP_CONV)) { - dlen = 0; - data[0] = (char)0; - data[1] = (char)0; - } - else { - dlen = 1; - data[0] = (char)(val & 0xff); - } - - /* - * Write value to device. - */ - if (i2c_write(sensor, reg, 1, data, dlen) != 0) - return 1; - - return 0; -} /* dtt_write() */ - - -static int _dtt_init(int sensor) -{ - int val; - - /* - * Setup High Temp. - */ - val = ((CFG_DTT_MAX_TEMP * 2) << 7) & 0xff80; - if (dtt_write(sensor, DTT_TEMP_HIGH, val) != 0) - return 1; - udelay(50000); /* Max 50ms */ - - /* - * Setup Low Temp - hysteresis. - */ - val = (((CFG_DTT_MAX_TEMP - CFG_DTT_HYSTERESIS) * 2) << 7) & 0xff80; - if (dtt_write(sensor, DTT_TEMP_LOW, val) != 0) - return 1; - udelay(50000); /* Max 50ms */ - - /* - * Setup configuraton register - * - * Clear THF & TLF, Reserved = 1, Polarity = Active Low, One Shot = YES - * - * We run in polled mode, since there isn't any way to know if this - * lousy device is ready to provide temperature readings on power up. - */ - val = 0x9; - if (dtt_write(sensor, DTT_CONFIG, val) != 0) - return 1; - udelay(50000); /* Max 50ms */ - - return 0; -} /* _dtt_init() */ - - -int dtt_init (void) -{ - int i; - unsigned char sensors[] = CONFIG_DTT_SENSORS; - - for (i = 0; i < sizeof(sensors); i++) { - if (_dtt_init(sensors[i]) != 0) - printf("DTT%d: FAILED\n", i+1); - else - printf("DTT%d: %i C\n", i+1, dtt_get_temp(sensors[i])); - } - - return (0); -} /* dtt_init() */ - - -int dtt_get_temp(int sensor) -{ - int i; - - /* - * Start a conversion, may take up to 1 second. - */ - dtt_write(sensor, DTT_WRITE_START_CONV, 0); - for (i = 0; i <= 10; i++) { - udelay(100000); - if (dtt_read(sensor, DTT_CONFIG) & 0x80) - break; - } - - return (dtt_read(sensor, DTT_READ_TEMP) / 256); -} /* dtt_get_temp() */ - - -#endif /* CONFIG_DTT_DS1621 */ -- cgit v1.2.3