diff options
Diffstat (limited to 'drivers/i2c/chips/adm1025.c')
| -rw-r--r-- | drivers/i2c/chips/adm1025.c | 577 |
1 files changed, 0 insertions, 577 deletions
diff --git a/drivers/i2c/chips/adm1025.c b/drivers/i2c/chips/adm1025.c deleted file mode 100644 index e452d0daf90..00000000000 --- a/drivers/i2c/chips/adm1025.c +++ /dev/null @@ -1,577 +0,0 @@ -/* - * adm1025.c - * - * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> - * Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org> - * - * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6 - * voltages (including its own power source) and up to two temperatures - * (its own plus up to one external one). Voltages are scaled internally - * (which is not the common way) with ratios such that the nominal value - * of each voltage correspond to a register value of 192 (which means a - * resolution of about 0.5% of the nominal value). Temperature values are - * reported with a 1 deg resolution and a 3 deg accuracy. Complete - * datasheet can be obtained from Analog's website at: - * http://www.analog.com/Analog_Root/productPage/productHome/0,2121,ADM1025,00.html - * - * This driver also supports the ADM1025A, which differs from the ADM1025 - * only in that it has "open-drain VID inputs while the ADM1025 has - * on-chip 100k pull-ups on the VID inputs". It doesn't make any - * difference for us. - * - * This driver also supports the NE1619, a sensor chip made by Philips. - * That chip is similar to the ADM1025A, with a few differences. The only - * difference that matters to us is that the NE1619 has only two possible - * addresses while the ADM1025A has a third one. Complete datasheet can be - * obtained from Philips's website at: - * http://www.semiconductors.philips.com/pip/NE1619DS.html - * - * Since the ADM1025 was the first chipset supported by this driver, most - * comments will refer to this chipset, but are actually general and - * concern all supported chipsets, unless mentioned otherwise. - * - * 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/jiffies.h> -#include <linux/i2c.h> -#include <linux/i2c-sensor.h> -#include <linux/i2c-vid.h> - -/* - * Addresses to scan - * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e. - * NE1619 has two possible addresses: 0x2c and 0x2d. - */ - -static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; -static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; - -/* - * Insmod parameters - */ - -SENSORS_INSMOD_2(adm1025, ne1619); - -/* - * The ADM1025 registers - */ - -#define ADM1025_REG_MAN_ID 0x3E -#define ADM1025_REG_CHIP_ID 0x3F -#define ADM1025_REG_CONFIG 0x40 -#define ADM1025_REG_STATUS1 0x41 -#define ADM1025_REG_STATUS2 0x42 -#define ADM1025_REG_IN(nr) (0x20 + (nr)) -#define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2) -#define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2) -#define ADM1025_REG_TEMP(nr) (0x26 + (nr)) -#define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2) -#define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2) -#define ADM1025_REG_VID 0x47 -#define ADM1025_REG_VID4 0x49 - -/* - * Conversions and various macros - * The ADM1025 uses signed 8-bit values for temperatures. - */ - -static int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; - -#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) -#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ - (val) * 192 >= (scale) * 255 ? 255 : \ - ((val) * 192 + (scale)/2) / (scale)) - -#define TEMP_FROM_REG(reg) ((reg) * 1000) -#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ - (val) >= 126500 ? 127 : \ - (((val) < 0 ? (val)-500 : (val)+500) / 1000)) - -/* - * Functions declaration - */ - -static int adm1025_attach_adapter(struct i2c_adapter *adapter); -static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind); -static void adm1025_init_client(struct i2c_client *client); -static int adm1025_detach_client(struct i2c_client *client); -static struct adm1025_data *adm1025_update_device(struct device *dev); - -/* - * Driver data (common to all clients) - */ - -static struct i2c_driver adm1025_driver = { - .owner = THIS_MODULE, - .name = "adm1025", - .id = I2C_DRIVERID_ADM1025, - .flags = I2C_DF_NOTIFY, - .attach_adapter = adm1025_attach_adapter, - .detach_client = adm1025_detach_client, -}; - -/* - * Client data (each client gets its own) - */ - -struct adm1025_data { - struct i2c_client client; - struct semaphore update_lock; - char valid; /* zero until following fields are valid */ - unsigned long last_updated; /* in jiffies */ - - u8 in[6]; /* register value */ - u8 in_max[6]; /* register value */ - u8 in_min[6]; /* register value */ - s8 temp[2]; /* register value */ - s8 temp_min[2]; /* register value */ - s8 temp_max[2]; /* register value */ - u16 alarms; /* register values, combined */ - u8 vid; /* register values, combined */ - u8 vrm; -}; - -/* - * Sysfs stuff - */ - -#define show_in(offset) \ -static ssize_t show_in##offset(struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - struct adm1025_data *data = adm1025_update_device(dev); \ - return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ - in_scale[offset])); \ -} \ -static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - struct adm1025_data *data = adm1025_update_device(dev); \ - return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ - in_scale[offset])); \ -} \ -static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - struct adm1025_data *data = adm1025_update_device(dev); \ - return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ - in_scale[offset])); \ -} \ -static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL); -show_in(0); -show_in(1); -show_in(2); -show_in(3); -show_in(4); -show_in(5); - -#define show_temp(offset) \ -static ssize_t show_temp##offset(struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - struct adm1025_data *data = adm1025_update_device(dev); \ - return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ -} \ -static ssize_t show_temp##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - struct adm1025_data *data = adm1025_update_device(dev); \ - return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[offset-1])); \ -} \ -static ssize_t show_temp##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - struct adm1025_data *data = adm1025_update_device(dev); \ - return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[offset-1])); \ -}\ -static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp##offset, NULL); -show_temp(1); -show_temp(2); - -#define set_in(offset) \ -static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ - size_t count) \ -{ \ - struct i2c_client *client = to_i2c_client(dev); \ - struct adm1025_data *data = i2c_get_clientdata(client); \ - long val = simple_strtol(buf, NULL, 10); \ - \ - down(&data->update_lock); \ - data->in_min[offset] = IN_TO_REG(val, in_scale[offset]); \ - i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(offset), \ - data->in_min[offset]); \ - up(&data->update_lock); \ - return count; \ -} \ -static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \ - size_t count) \ -{ \ - struct i2c_client *client = to_i2c_client(dev); \ - struct adm1025_data *data = i2c_get_clientdata(client); \ - long val = simple_strtol(buf, NULL, 10); \ - \ - down(&data->update_lock); \ - data->in_max[offset] = IN_TO_REG(val, in_scale[offset]); \ - i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(offset), \ - data->in_max[offset]); \ - up(&data->update_lock); \ - return count; \ -} \ -static DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ - show_in##offset##_min, set_in##offset##_min); \ -static DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ - show_in##offset##_max, set_in##offset##_max); -set_in(0); -set_in(1); -set_in(2); -set_in(3); -set_in(4); -set_in(5); - -#define set_temp(offset) \ -static ssize_t set_temp##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ - size_t count) \ -{ \ - struct i2c_client *client = to_i2c_client(dev); \ - struct adm1025_data *data = i2c_get_clientdata(client); \ - long val = simple_strtol(buf, NULL, 10); \ - \ - down(&data->update_lock); \ - data->temp_min[offset-1] = TEMP_TO_REG(val); \ - i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(offset-1), \ - data->temp_min[offset-1]); \ - up(&data->update_lock); \ - return count; \ -} \ -static ssize_t set_temp##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \ - size_t count) \ -{ \ - struct i2c_client *client = to_i2c_client(dev); \ - struct adm1025_data *data = i2c_get_clientdata(client); \ - long val = simple_strtol(buf, NULL, 10); \ - \ - down(&data->update_lock); \ - data->temp_max[offset-1] = TEMP_TO_REG(val); \ - i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(offset-1), \ - data->temp_max[offset-1]); \ - up(&data->update_lock); \ - return count; \ -} \ -static DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ - show_temp##offset##_min, set_temp##offset##_min); \ -static DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ - show_temp##offset##_max, set_temp##offset##_max); -set_temp(1); -set_temp(2); - -static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct adm1025_data *data = adm1025_update_device(dev); - return sprintf(buf, "%u\n", data->alarms); -} -static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); - -static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct adm1025_data *data = adm1025_update_device(dev); - return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); -} -/* in1_ref is deprecated in favour of cpu0_vid, remove after 2005-11-11 */ -static DEVICE_ATTR(in1_ref, S_IRUGO, show_vid, NULL); -static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); - -static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct adm1025_data *data = adm1025_update_device(dev); - return sprintf(buf, "%u\n", data->vrm); -} -static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - struct adm1025_data *data = i2c_get_clientdata(client); - data->vrm = simple_strtoul(buf, NULL, 10); - return count; -} -static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); - -/* - * Real code - */ - -static int adm1025_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & I2C_CLASS_HWMON)) - return 0; - return i2c_detect(adapter, &addr_data, adm1025_detect); -} - -/* - * The following function does more than just detection. If detection - * succeeds, it also registers the new chip. - */ -static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind) -{ - struct i2c_client *new_client; - struct adm1025_data *data; - int err = 0; - const char *name = ""; - u8 config; - - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - goto exit; - - if (!(data = kmalloc(sizeof(struct adm1025_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; - } - memset(data, 0, sizeof(struct adm1025_data)); - - /* The common I2C client data is placed right before the - ADM1025-specific data. */ - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - new_client->adapter = adapter; - new_client->driver = &adm1025_driver; - new_client->flags = 0; - - /* - * Now we do the remaining detection. A negative kind means that - * the driver was loaded with no force parameter (default), so we - * must both detect and identify the chip. A zero kind means that - * the driver was loaded with the force parameter, the detection - * step shall be skipped. A positive kind means that the driver - * was loaded with the force parameter and a given kind of chip is - * requested, so both the detection and the identification steps - * are skipped. - */ - config = i2c_smbus_read_byte_data(new_client, ADM1025_REG_CONFIG); - if (kind < 0) { /* detection */ - if ((config & 0x80) != 0x00 - || (i2c_smbus_read_byte_data(new_client, - ADM1025_REG_STATUS1) & 0xC0) != 0x00 - || (i2c_smbus_read_byte_data(new_client, - ADM1025_REG_STATUS2) & 0xBC) != 0x00) { - dev_dbg(&adapter->dev, - "ADM1025 detection failed at 0x%02x.\n", - address); - goto exit_free; - } - } - - if (kind <= 0) { /* identification */ - u8 man_id, chip_id; - - man_id = i2c_smbus_read_byte_data(new_client, - ADM1025_REG_MAN_ID); - chip_id = i2c_smbus_read_byte_data(new_client, - ADM1025_REG_CHIP_ID); - - if (man_id == 0x41) { /* Analog Devices */ - if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */ - kind = adm1025; - } - } else - if (man_id == 0xA1) { /* Philips */ - if (address != 0x2E - && (chip_id & 0xF0) == 0x20) { /* NE1619 */ - kind = ne1619; - } - } - - if (kind <= 0) { /* identification failed */ - dev_info(&adapter->dev, - "Unsupported chip (man_id=0x%02X, " - "chip_id=0x%02X).\n", man_id, chip_id); - goto exit_free; - } - } - - if (kind == adm1025) { - name = "adm1025"; - } else if (kind == ne1619) { - name = "ne1619"; - } - - /* We can fill in the remaining client fields */ - strlcpy(new_client->name, name, I2C_NAME_SIZE); - data->valid = 0; - init_MUTEX(&data->update_lock); - - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(new_client))) - goto exit_free; - - /* Initialize the ADM1025 chip */ - adm1025_init_client(new_client); - - /* Register sysfs hooks */ - device_create_file(&new_client->dev, &dev_attr_in0_input); - device_create_file(&new_client->dev, &dev_attr_in1_input); - device_create_file(&new_client->dev, &dev_attr_in2_input); - device_create_file(&new_client->dev, &dev_attr_in3_input); - device_create_file(&new_client->dev, &dev_attr_in5_input); - device_create_file(&new_client->dev, &dev_attr_in0_min); - device_create_file(&new_client->dev, &dev_attr_in1_min); - device_create_file(&new_client->dev, &dev_attr_in2_min); - device_create_file(&new_client->dev, &dev_attr_in3_min); - device_create_file(&new_client->dev, &dev_attr_in5_min); - device_create_file(&new_client->dev, &dev_attr_in0_max); - device_create_file(&new_client->dev, &dev_attr_in1_max); - device_create_file(&new_client->dev, &dev_attr_in2_max); - device_create_file(&new_client->dev, &dev_attr_in3_max); - device_create_file(&new_client->dev, &dev_attr_in5_max); - device_create_file(&new_client->dev, &dev_attr_temp1_input); - device_create_file(&new_client->dev, &dev_attr_temp2_input); - device_create_file(&new_client->dev, &dev_attr_temp1_min); - device_create_file(&new_client->dev, &dev_attr_temp2_min); - device_create_file(&new_client->dev, &dev_attr_temp1_max); - device_create_file(&new_client->dev, &dev_attr_temp2_max); - device_create_file(&new_client->dev, &dev_attr_alarms); - /* in1_ref is deprecated, remove after 2005-11-11 */ - device_create_file(&new_client->dev, &dev_attr_in1_ref); - device_create_file(&new_client->dev, &dev_attr_cpu0_vid); - device_create_file(&new_client->dev, &dev_attr_vrm); - - /* Pin 11 is either in4 (+12V) or VID4 */ - if (!(config & 0x20)) { - device_create_file(&new_client->dev, &dev_attr_in4_input); - device_create_file(&new_client->dev, &dev_attr_in4_min); - device_create_file(&new_client->dev, &dev_attr_in4_max); - } - - return 0; - -exit_free: - kfree(data); -exit: - return err; -} - -static void adm1025_init_client(struct i2c_client *client) -{ - u8 reg; - struct adm1025_data *data = i2c_get_clientdata(client); - int i; - - data->vrm = i2c_which_vrm(); - - /* - * Set high limits - * Usually we avoid setting limits on driver init, but it happens - * that the ADM1025 comes with stupid default limits (all registers - * set to 0). In case the chip has not gone through any limit - * setting yet, we better set the high limits to the max so that - * no alarm triggers. - */ - for (i=0; i<6; i++) { - reg = i2c_smbus_read_byte_data(client, - ADM1025_REG_IN_MAX(i)); - if (reg == 0) - i2c_smbus_write_byte_data(client, - ADM1025_REG_IN_MAX(i), - 0xFF); - } - for (i=0; i<2; i++) { - reg = i2c_smbus_read_byte_data(client, - ADM1025_REG_TEMP_HIGH(i)); - if (reg == 0) - i2c_smbus_write_byte_data(client, - ADM1025_REG_TEMP_HIGH(i), - 0x7F); - } - - /* - * Start the conversions - */ - reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); - if (!(reg & 0x01)) - i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, - (reg&0x7E)|0x01); -} - -static int adm1025_detach_client(struct i2c_client *client) -{ - int err; - - if ((err = i2c_detach_client(client))) { - dev_err(&client->dev, "Client deregistration failed, " - "client not detached.\n"); - return err; - } - - kfree(i2c_get_clientdata(client)); - return 0; -} - -static struct adm1025_data *adm1025_update_device(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct adm1025_data *data = i2c_get_clientdata(client); - - down(&data->update_lock); - - if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { - int i; - - dev_dbg(&client->dev, "Updating data.\n"); - for (i=0; i<6; i++) { - data->in[i] = i2c_smbus_read_byte_data(client, - ADM1025_REG_IN(i)); - data->in_min[i] = i2c_smbus_read_byte_data(client, - ADM1025_REG_IN_MIN(i)); - data->in_max[i] = i2c_smbus_read_byte_data(client, - ADM1025_REG_IN_MAX(i)); - } - for (i=0; i<2; i++) { - data->temp[i] = i2c_smbus_read_byte_data(client, - ADM1025_REG_TEMP(i)); - data->temp_min[i] = i2c_smbus_read_byte_data(client, - ADM1025_REG_TEMP_LOW(i)); - data->temp_max[i] = i2c_smbus_read_byte_data(client, - ADM1025_REG_TEMP_HIGH(i)); - } - data->alarms = i2c_smbus_read_byte_data(client, - ADM1025_REG_STATUS1) - | (i2c_smbus_read_byte_data(client, - ADM1025_REG_STATUS2) << 8); - data->vid = (i2c_smbus_read_byte_data(client, - ADM1025_REG_VID) & 0x0f) - | ((i2c_smbus_read_byte_data(client, - ADM1025_REG_VID4) & 0x01) << 4); - - data->last_updated = jiffies; - data->valid = 1; - } - - up(&data->update_lock); - - return data; -} - -static int __init sensors_adm1025_init(void) -{ - return i2c_add_driver(&adm1025_driver); -} - -static void __exit sensors_adm1025_exit(void) -{ - i2c_del_driver(&adm1025_driver); -} - -MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); -MODULE_DESCRIPTION("ADM1025 driver"); -MODULE_LICENSE("GPL"); - -module_init(sensors_adm1025_init); -module_exit(sensors_adm1025_exit); |