Release 4.11 drivers/hwmon/pmbus/ucd9000.c

Directory: drivers/hwmon/pmbus
/*
 * Hardware monitoring driver for UCD90xxx Sequencer and System Health
 * Controller series
 *
 * Copyright (C) 2011 Ericsson AB.
 *
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/i2c/pmbus.h>
#include "pmbus.h"








enum chips { ucd9000, ucd90120, ucd90124, ucd90160, ucd9090, ucd90910 };


#define UCD9000_MONITOR_CONFIG		0xd5

#define UCD9000_NUM_PAGES		0xd6

#define UCD9000_FAN_CONFIG_INDEX	0xe7

#define UCD9000_FAN_CONFIG		0xe8

#define UCD9000_DEVICE_ID		0xfd


#define UCD9000_MON_TYPE(x)	(((x) >> 5) & 0x07)

#define UCD9000_MON_PAGE(x)	((x) & 0x0f)


#define UCD9000_MON_VOLTAGE	1

#define UCD9000_MON_TEMPERATURE	2

#define UCD9000_MON_CURRENT	3

#define UCD9000_MON_VOLTAGE_HW	4


#define UCD9000_NUM_FAN		4


struct ucd9000_data {
	
u8 fan_data[UCD9000_NUM_FAN][I2C_SMBUS_BLOCK_MAX];
	
struct pmbus_driver_info info;
};

#define to_ucd9000_data(_info) container_of(_info, struct ucd9000_data, info)



static int ucd9000_get_fan_config(struct i2c_client *client, int fan)
{
	int fan_config = 0;
	struct ucd9000_data *data
	  = to_ucd9000_data(pmbus_get_driver_info(client));

	if (data->fan_data[fan][3] & 1)
		fan_config |= PB_FAN_2_INSTALLED;   /* Use lower bit position */

	/* Pulses/revolution */
	fan_config |= (data->fan_data[fan][3] & 0x06) >> 1;

	return fan_config;
}

Contributors
Person Tokens Prop Commits CommitProp
Guenter Roeck 73 100.00% 1 100.00%
Total 73 100.00% 1 100.00%



static int ucd9000_read_byte_data(struct i2c_client *client, int page, int reg)
{
	int ret = 0;
	int fan_config;

	switch (reg) {
	case PMBUS_FAN_CONFIG_12:
		if (page > 0)
			return -ENXIO;

		ret = ucd9000_get_fan_config(client, 0);
		if (ret < 0)
			return ret;
		fan_config = ret << 4;
		ret = ucd9000_get_fan_config(client, 1);
		if (ret < 0)
			return ret;
		fan_config |= ret;
		ret = fan_config;
		break;
	case PMBUS_FAN_CONFIG_34:
		if (page > 0)
			return -ENXIO;

		ret = ucd9000_get_fan_config(client, 2);
		if (ret < 0)
			return ret;
		fan_config = ret << 4;
		ret = ucd9000_get_fan_config(client, 3);
		if (ret < 0)
			return ret;
		fan_config |= ret;
		ret = fan_config;
		break;
	default:
		ret = -ENODATA;
		break;
	}
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Guenter Roeck 169 100.00% 3 100.00%
Total 169 100.00% 3 100.00%


static const struct i2c_device_id ucd9000_id[] = {
	{"ucd9000", ucd9000},
	{"ucd90120", ucd90120},
	{"ucd90124", ucd90124},
	{"ucd90160", ucd90160},
	{"ucd9090", ucd9090},
	{"ucd90910", ucd90910},
	{}
};
MODULE_DEVICE_TABLE(i2c, ucd9000_id);



static int ucd9000_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
	struct ucd9000_data *data;
	struct pmbus_driver_info *info;
	const struct i2c_device_id *mid;
	int i, ret;

	if (!i2c_check_functionality(client->adapter,
				     I2C_FUNC_SMBUS_BYTE_DATA |
				     I2C_FUNC_SMBUS_BLOCK_DATA))
		return -ENODEV;

	ret = i2c_smbus_read_block_data(client, UCD9000_DEVICE_ID,
					block_buffer);
	if (ret < 0) {
		dev_err(&client->dev, "Failed to read device ID\n");
		return ret;
	}
	block_buffer[ret] = '\0';
	dev_info(&client->dev, "Device ID %s\n", block_buffer);

	for (mid = ucd9000_id; mid->name[0]; mid++) {
		if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
			break;
	}
	if (!mid->name[0]) {
		dev_err(&client->dev, "Unsupported device\n");
		return -ENODEV;
	}

	if (id->driver_data != ucd9000 && id->driver_data != mid->driver_data)
		dev_notice(&client->dev,
			   "Device mismatch: Configured %s, detected %s\n",
			   id->name, mid->name);

	data = devm_kzalloc(&client->dev, sizeof(struct ucd9000_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;
	info = &data->info;

	ret = i2c_smbus_read_byte_data(client, UCD9000_NUM_PAGES);
	if (ret < 0) {
		dev_err(&client->dev,
			"Failed to read number of active pages\n");
		return ret;
	}
	info->pages = ret;
	if (!info->pages) {
		dev_err(&client->dev, "No pages configured\n");
		return -ENODEV;
	}

	/* The internal temperature sensor is always active */
	info->func[0] = PMBUS_HAVE_TEMP;

	/* Everything else is configurable */
	ret = i2c_smbus_read_block_data(client, UCD9000_MONITOR_CONFIG,
					block_buffer);
	if (ret <= 0) {
		dev_err(&client->dev, "Failed to read configuration data\n");
		return -ENODEV;
	}
	for (i = 0; i < ret; i++) {
		int page = UCD9000_MON_PAGE(block_buffer[i]);

		if (page >= info->pages)
			continue;

		switch (UCD9000_MON_TYPE(block_buffer[i])) {
		case UCD9000_MON_VOLTAGE:
		case UCD9000_MON_VOLTAGE_HW:
			info->func[page] |= PMBUS_HAVE_VOUT
			  | PMBUS_HAVE_STATUS_VOUT;
			break;
		case UCD9000_MON_TEMPERATURE:
			info->func[page] |= PMBUS_HAVE_TEMP2
			  | PMBUS_HAVE_STATUS_TEMP;
			break;
		case UCD9000_MON_CURRENT:
			info->func[page] |= PMBUS_HAVE_IOUT
			  | PMBUS_HAVE_STATUS_IOUT;
			break;
		default:
			break;
		}
	}

	/* Fan configuration */
	if (mid->driver_data == ucd90124) {
		for (i = 0; i < UCD9000_NUM_FAN; i++) {
			i2c_smbus_write_byte_data(client,
						  UCD9000_FAN_CONFIG_INDEX, i);
			ret = i2c_smbus_read_block_data(client,
							UCD9000_FAN_CONFIG,
							data->fan_data[i]);
			if (ret < 0)
				return ret;
		}
		i2c_smbus_write_byte_data(client, UCD9000_FAN_CONFIG_INDEX, 0);

		info->read_byte_data = ucd9000_read_byte_data;
		info->func[0] |= PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12
		  | PMBUS_HAVE_FAN34 | PMBUS_HAVE_STATUS_FAN34;
	}

	return pmbus_do_probe(client, mid, info);
}

Contributors
Person Tokens Prop Commits CommitProp
Guenter Roeck 535 97.81% 2 66.67%
Jean Delvare 12 2.19% 1 33.33%
Total 547 100.00% 3 100.00%

/* This is the driver that will be inserted */

static struct i2c_driver ucd9000_driver = {
	.driver = {
		.name = "ucd9000",
        },
	.probe = ucd9000_probe,
	.remove = pmbus_do_remove,
	.id_table = ucd9000_id,
};


module_i2c_driver(ucd9000_driver);

MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for TI UCD90xxx");
MODULE_LICENSE("GPL");
Overall Contributors
Person Tokens Prop Commits CommitProp
Guenter Roeck 995 97.93% 5 62.50%
Jean Delvare 12 1.18% 1 12.50%
Matt Weber 8 0.79% 1 12.50%
Axel Lin 1 0.10% 1 12.50%
Total 1016 100.00% 8 100.00%
Directory: drivers/hwmon/pmbus

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Guenter Roeck	73	100.00%	1	100.00%
Total	73	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 drivers/hwmon/pmbus/ucd9000.c

Contributors

Contributors

Contributors

Overall Contributors
