hwmon: (sch5627) Factor out some code shared with sch5636 driver (28ff2f7a) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/hwmon/Kconfig

+5 −0

Original line number	Diff line number	Diff line
		@@ -1041,8 +1041,13 @@ config SENSORS_SMSC47B397
		This driver can also be built as a module. If so, the module
		will be called smsc47b397.

		config SENSORS_SCH56XX_COMMON
		tristate
		default n

		config SENSORS_SCH5627
		tristate "SMSC SCH5627"
		select SENSORS_SCH56XX_COMMON
		help
		If you say yes here you get support for the hardware monitoring
		features of the SMSC SCH5627 Super-I/O chip.

drivers/hwmon/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -95,6 +95,7 @@ obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
		obj-$(CONFIG_SENSORS_PC87427) += pc87427.o
		obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
		obj-$(CONFIG_SENSORS_S3C) += s3c-hwmon.o
		obj-$(CONFIG_SENSORS_SCH56XX_COMMON)+= sch56xx-common.o
		obj-$(CONFIG_SENSORS_SCH5627) += sch5627.o
		obj-$(CONFIG_SENSORS_SHT15) += sht15.o
		obj-$(CONFIG_SENSORS_SHT21) += sht21.o

drivers/hwmon/sch5627.c

+24 −310

Original line number	Diff line number	Diff line
		@@ -28,33 +28,15 @@
		#include <linux/hwmon-sysfs.h>
		#include <linux/err.h>
		#include <linux/mutex.h>
		#include <linux/io.h>
		#include <linux/acpi.h>
		#include <linux/delay.h>
		#include "sch56xx-common.h"

		#define DRVNAME "sch5627"
		#define DEVNAME DRVNAME /* We only support one model */

		#define SIO_SCH5627_EM_LD 0x0C /* Embedded Microcontroller LD */
		#define SIO_UNLOCK_KEY 0x55 /* Key to enable Super-I/O */
		#define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */

		#define SIO_REG_LDSEL 0x07 /* Logical device select */
		#define SIO_REG_DEVID 0x20 /* Device ID */
		#define SIO_REG_ENABLE 0x30 /* Logical device enable */
		#define SIO_REG_ADDR 0x66 /* Logical device address (2 bytes) */

		#define SIO_SCH5627_ID 0xC6 /* Chipset ID */

		#define REGION_LENGTH 9

		#define SCH5627_HWMON_ID 0xa5
		#define SCH5627_COMPANY_ID 0x5c
		#define SCH5627_PRIMARY_ID 0xa0

		#define SCH5627_CMD_READ 0x02
		#define SCH5627_CMD_WRITE 0x03

		#define SCH5627_REG_BUILD_CODE 0x39
		#define SCH5627_REG_BUILD_ID 0x3a
		#define SCH5627_REG_HWMON_ID 0x3c
		@@ -111,182 +93,6 @@ struct sch5627_data {
		u16 in[SCH5627_NO_IN];
		};

		static struct platform_device *sch5627_pdev;

		/* Super I/O functions */
		static inline int superio_inb(int base, int reg)
		{
		outb(reg, base);
		return inb(base + 1);
		}

		static inline int superio_enter(int base)
		{
		/* Don't step on other drivers' I/O space by accident */
		if (!request_muxed_region(base, 2, DRVNAME)) {
		pr_err("I/O address 0x%04x already in use\n", base);
		return -EBUSY;
		}

		outb(SIO_UNLOCK_KEY, base);

		return 0;
		}

		static inline void superio_select(int base, int ld)
		{
		outb(SIO_REG_LDSEL, base);
		outb(ld, base + 1);
		}

		static inline void superio_exit(int base)
		{
		outb(SIO_LOCK_KEY, base);
		release_region(base, 2);
		}

		static int sch5627_send_cmd(struct sch5627_data *data, u8 cmd, u16 reg, u8 v)
		{
		u8 val;
		int i;
		/*
		* According to SMSC for the commands we use the maximum time for
		* the EM to respond is 15 ms, but testing shows in practice it
		* responds within 15-32 reads, so we first busy poll, and if
		* that fails sleep a bit and try again until we are way past
		* the 15 ms maximum response time.
		*/
		const int max_busy_polls = 64;
		const int max_lazy_polls = 32;

		/* (Optional) Write-Clear the EC to Host Mailbox Register */
		val = inb(data->addr + 1);
		outb(val, data->addr + 1);

		/* Set Mailbox Address Pointer to first location in Region 1 */
		outb(0x00, data->addr + 2);
		outb(0x80, data->addr + 3);

		/* Write Request Packet Header */
		outb(cmd, data->addr + 4); /* VREG Access Type read:0x02 write:0x03 */
		outb(0x01, data->addr + 5); /* # of Entries: 1 Byte (8-bit) */
		outb(0x04, data->addr + 2); /* Mailbox AP to first data entry loc. */

		/* Write Value field */
		if (cmd == SCH5627_CMD_WRITE)
		outb(v, data->addr + 4);

		/* Write Address field */
		outb(reg & 0xff, data->addr + 6);
		outb(reg >> 8, data->addr + 7);

		/* Execute the Random Access Command */
		outb(0x01, data->addr); /* Write 01h to the Host-to-EC register */

		/* EM Interface Polling "Algorithm" */
		for (i = 0; i < max_busy_polls + max_lazy_polls; i++) {
		if (i >= max_busy_polls)
		msleep(1);
		/* Read Interrupt source Register */
		val = inb(data->addr + 8);
		/* Write Clear the interrupt source bits */
		if (val)
		outb(val, data->addr + 8);
		/* Command Completed ? */
		if (val & 0x01)
		break;
		}
		if (i == max_busy_polls + max_lazy_polls) {
		pr_err("Max retries exceeded reading virtual "
		"register 0x%04hx (%d)\n", reg, 1);
		return -EIO;
		}

		/*
		* According to SMSC we may need to retry this, but sofar I've always
		* seen this succeed in 1 try.
		*/
		for (i = 0; i < max_busy_polls; i++) {
		/* Read EC-to-Host Register */
		val = inb(data->addr + 1);
		/* Command Completed ? */
		if (val == 0x01)
		break;

		if (i == 0)
		pr_warn("EC reports: 0x%02x reading virtual register "
		"0x%04hx\n", (unsigned int)val, reg);
		}
		if (i == max_busy_polls) {
		pr_err("Max retries exceeded reading virtual "
		"register 0x%04hx (%d)\n", reg, 2);
		return -EIO;
		}

		/*
		* According to the SMSC app note we should now do:
		*
		* Set Mailbox Address Pointer to first location in Region 1 *
		* outb(0x00, data->addr + 2);
		* outb(0x80, data->addr + 3);
		*
		* But if we do that things don't work, so let's not.
		*/

		/* Read Value field */
		if (cmd == SCH5627_CMD_READ)
		return inb(data->addr + 4);

		return 0;
		}

		static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg)
		{
		return sch5627_send_cmd(data, SCH5627_CMD_READ, reg, 0);
		}

		static int sch5627_write_virtual_reg(struct sch5627_data *data,
		u16 reg, u8 val)
		{
		return sch5627_send_cmd(data, SCH5627_CMD_WRITE, reg, val);
		}

		static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg)
		{
		int lsb, msb;

		/* Read LSB first, this will cause the matching MSB to be latched */
		lsb = sch5627_read_virtual_reg(data, reg);
		if (lsb < 0)
		return lsb;

		msb = sch5627_read_virtual_reg(data, reg + 1);
		if (msb < 0)
		return msb;

		return lsb \| (msb << 8);
		}

		static int sch5627_read_virtual_reg12(struct sch5627_data *data, u16 msb_reg,
		u16 lsn_reg, int high_nibble)
		{
		int msb, lsn;

		/* Read MSB first, this will cause the matching LSN to be latched */
		msb = sch5627_read_virtual_reg(data, msb_reg);
		if (msb < 0)
		return msb;

		lsn = sch5627_read_virtual_reg(data, lsn_reg);
		if (lsn < 0)
		return lsn;

		if (high_nibble)
		return (msb << 4) \| (lsn >> 4);
		else
		return (msb << 4) \| (lsn & 0x0f);
		}

		static struct sch5627_data sch5627_update_device(struct device dev)
		{
		struct sch5627_data *data = dev_get_drvdata(dev);
		@@ -297,7 +103,7 @@ static struct sch5627_data sch5627_update_device(struct device dev)

		/* Trigger a Vbat voltage measurement every 5 minutes */
		if (time_after(jiffies, data->last_battery + 300 * HZ)) {
		sch5627_write_virtual_reg(data, SCH5627_REG_CTRL,
		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
		data->control \| 0x10);
		data->last_battery = jiffies;
		}
		@@ -305,7 +111,7 @@ static struct sch5627_data sch5627_update_device(struct device dev)
		/* Cache the values for 1 second */
		if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
		for (i = 0; i < SCH5627_NO_TEMPS; i++) {
		val = sch5627_read_virtual_reg12(data,
		val = sch56xx_read_virtual_reg12(data->addr,
		SCH5627_REG_TEMP_MSB[i],
		SCH5627_REG_TEMP_LSN[i],
		SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
		@@ -317,7 +123,7 @@ static struct sch5627_data sch5627_update_device(struct device dev)
		}

		for (i = 0; i < SCH5627_NO_FANS; i++) {
		val = sch5627_read_virtual_reg16(data,
		val = sch56xx_read_virtual_reg16(data->addr,
		SCH5627_REG_FAN[i]);
		if (unlikely(val < 0)) {
		ret = ERR_PTR(val);
		@@ -327,7 +133,7 @@ static struct sch5627_data sch5627_update_device(struct device dev)
		}

		for (i = 0; i < SCH5627_NO_IN; i++) {
		val = sch5627_read_virtual_reg12(data,
		val = sch56xx_read_virtual_reg12(data->addr,
		SCH5627_REG_IN_MSB[i],
		SCH5627_REG_IN_LSN[i],
		SCH5627_REG_IN_HIGH_NIBBLE[i]);
		@@ -355,18 +161,21 @@ static int __devinit sch5627_read_limits(struct sch5627_data *data)
		* Note what SMSC calls ABS, is what lm_sensors calls max
		* (aka high), and HIGH is what lm_sensors calls crit.
		*/
		val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_ABS[i]);
		val = sch56xx_read_virtual_reg(data->addr,
		SCH5627_REG_TEMP_ABS[i]);
		if (val < 0)
		return val;
		data->temp_max[i] = val;

		val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_HIGH[i]);
		val = sch56xx_read_virtual_reg(data->addr,
		SCH5627_REG_TEMP_HIGH[i]);
		if (val < 0)
		return val;
		data->temp_crit[i] = val;
		}
		for (i = 0; i < SCH5627_NO_FANS; i++) {
		val = sch5627_read_virtual_reg16(data, SCH5627_REG_FAN_MIN[i]);
		val = sch56xx_read_virtual_reg16(data->addr,
		SCH5627_REG_FAN_MIN[i]);
		if (val < 0)
		return val;
		data->fan_min[i] = val;
		@@ -667,7 +476,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
		mutex_init(&data->update_lock);
		platform_set_drvdata(pdev, data);

		val = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_ID);
		val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
		if (val < 0) {
		err = val;
		goto error;
		@@ -679,7 +488,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
		goto error;
		}

		val = sch5627_read_virtual_reg(data, SCH5627_REG_COMPANY_ID);
		val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
		if (val < 0) {
		err = val;
		goto error;
		@@ -691,7 +500,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
		goto error;
		}

		val = sch5627_read_virtual_reg(data, SCH5627_REG_PRIMARY_ID);
		val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
		if (val < 0) {
		err = val;
		goto error;
		@@ -703,25 +512,28 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
		goto error;
		}

		build_code = sch5627_read_virtual_reg(data, SCH5627_REG_BUILD_CODE);
		build_code = sch56xx_read_virtual_reg(data->addr,
		SCH5627_REG_BUILD_CODE);
		if (build_code < 0) {
		err = build_code;
		goto error;
		}

		build_id = sch5627_read_virtual_reg16(data, SCH5627_REG_BUILD_ID);
		build_id = sch56xx_read_virtual_reg16(data->addr,
		SCH5627_REG_BUILD_ID);
		if (build_id < 0) {
		err = build_id;
		goto error;
		}

		hwmon_rev = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_REV);
		hwmon_rev = sch56xx_read_virtual_reg(data->addr,
		SCH5627_REG_HWMON_REV);
		if (hwmon_rev < 0) {
		err = hwmon_rev;
		goto error;
		}

		val = sch5627_read_virtual_reg(data, SCH5627_REG_CTRL);
		val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
		if (val < 0) {
		err = val;
		goto error;
		@@ -734,7 +546,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
		}
		/* Trigger a Vbat voltage measurement, so that we get a valid reading
		the first time we read Vbat */
		sch5627_write_virtual_reg(data, SCH5627_REG_CTRL,
		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
		data->control \| 0x10);
		data->last_battery = jiffies;

		@@ -746,6 +558,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
		if (err)
		goto error;

		pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
		pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
		build_code, build_id, hwmon_rev);

		@@ -768,85 +581,6 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
		return err;
		}

		static int __init sch5627_find(int sioaddr, unsigned short *address)
		{
		u8 devid;
		int err = superio_enter(sioaddr);
		if (err)
		return err;

		devid = superio_inb(sioaddr, SIO_REG_DEVID);
		if (devid != SIO_SCH5627_ID) {
		pr_debug("Unsupported device id: 0x%02x\n",
		(unsigned int)devid);
		err = -ENODEV;
		goto exit;
		}

		superio_select(sioaddr, SIO_SCH5627_EM_LD);

		if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
		pr_warn("Device not activated\n");
		err = -ENODEV;
		goto exit;
		}

		/*
		* Warning the order of the low / high byte is the other way around
		* as on most other superio devices!!
		*/
		*address = superio_inb(sioaddr, SIO_REG_ADDR) \|
		superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8;
		if (*address == 0) {
		pr_warn("Base address not set\n");
		err = -ENODEV;
		goto exit;
		}

		pr_info("Found %s chip at %#hx\n", DEVNAME, *address);
		exit:
		superio_exit(sioaddr);
		return err;
		}

		static int __init sch5627_device_add(unsigned short address)
		{
		struct resource res = {
		.start = address,
		.end = address + REGION_LENGTH - 1,
		.flags = IORESOURCE_IO,
		};
		int err;

		sch5627_pdev = platform_device_alloc(DRVNAME, address);
		if (!sch5627_pdev)
		return -ENOMEM;

		res.name = sch5627_pdev->name;
		err = acpi_check_resource_conflict(&res);
		if (err)
		goto exit_device_put;

		err = platform_device_add_resources(sch5627_pdev, &res, 1);
		if (err) {
		pr_err("Device resource addition failed\n");
		goto exit_device_put;
		}

		err = platform_device_add(sch5627_pdev);
		if (err) {
		pr_err("Device addition failed\n");
		goto exit_device_put;
		}

		return 0;

		exit_device_put:
		platform_device_put(sch5627_pdev);

		return err;
		}

		static struct platform_driver sch5627_driver = {
		.driver = {
		.owner = THIS_MODULE,
		@@ -858,31 +592,11 @@ static struct platform_driver sch5627_driver = {

		static int __init sch5627_init(void)
		{
		int err = -ENODEV;
		unsigned short address;

		if (sch5627_find(0x4e, &address) && sch5627_find(0x2e, &address))
		goto exit;

		err = platform_driver_register(&sch5627_driver);
		if (err)
		goto exit;

		err = sch5627_device_add(address);
		if (err)
		goto exit_driver;

		return 0;

		exit_driver:
		platform_driver_unregister(&sch5627_driver);
		exit:
		return err;
		return platform_driver_register(&sch5627_driver);
		}

		static void __exit sch5627_exit(void)
		{
		platform_device_unregister(sch5627_pdev);
		platform_driver_unregister(&sch5627_driver);
		}

drivers/hwmon/sch56xx-common.c

0 → 100644

+336 −0

Original line number	Diff line number	Diff line
		/***************************************************************************
		* Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com> *
		* *
		* 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. *
		***************************************************************************/

		#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/platform_device.h>
		#include <linux/err.h>
		#include <linux/io.h>
		#include <linux/acpi.h>
		#include <linux/delay.h>
		#include "sch56xx-common.h"

		#define SIO_SCH56XX_LD_EM 0x0C /* Embedded uController Logical Dev */
		#define SIO_UNLOCK_KEY 0x55 /* Key to enable Super-I/O */
		#define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */

		#define SIO_REG_LDSEL 0x07 /* Logical device select */
		#define SIO_REG_DEVID 0x20 /* Device ID */
		#define SIO_REG_ENABLE 0x30 /* Logical device enable */
		#define SIO_REG_ADDR 0x66 /* Logical device address (2 bytes) */

		#define SIO_SCH5627_ID 0xC6 /* Chipset ID */

		#define REGION_LENGTH 9

		#define SCH56XX_CMD_READ 0x02
		#define SCH56XX_CMD_WRITE 0x03

		static struct platform_device *sch56xx_pdev;

		/* Super I/O functions */
		static inline int superio_inb(int base, int reg)
		{
		outb(reg, base);
		return inb(base + 1);
		}

		static inline int superio_enter(int base)
		{
		/* Don't step on other drivers' I/O space by accident */
		if (!request_muxed_region(base, 2, "sch56xx")) {
		pr_err("I/O address 0x%04x already in use\n", base);
		return -EBUSY;
		}

		outb(SIO_UNLOCK_KEY, base);

		return 0;
		}

		static inline void superio_select(int base, int ld)
		{
		outb(SIO_REG_LDSEL, base);
		outb(ld, base + 1);
		}

		static inline void superio_exit(int base)
		{
		outb(SIO_LOCK_KEY, base);
		release_region(base, 2);
		}

		static int sch56xx_send_cmd(u16 addr, u8 cmd, u16 reg, u8 v)
		{
		u8 val;
		int i;
		/*
		* According to SMSC for the commands we use the maximum time for
		* the EM to respond is 15 ms, but testing shows in practice it
		* responds within 15-32 reads, so we first busy poll, and if
		* that fails sleep a bit and try again until we are way past
		* the 15 ms maximum response time.
		*/
		const int max_busy_polls = 64;
		const int max_lazy_polls = 32;

		/* (Optional) Write-Clear the EC to Host Mailbox Register */
		val = inb(addr + 1);
		outb(val, addr + 1);

		/* Set Mailbox Address Pointer to first location in Region 1 */
		outb(0x00, addr + 2);
		outb(0x80, addr + 3);

		/* Write Request Packet Header */
		outb(cmd, addr + 4); /* VREG Access Type read:0x02 write:0x03 */
		outb(0x01, addr + 5); /* # of Entries: 1 Byte (8-bit) */
		outb(0x04, addr + 2); /* Mailbox AP to first data entry loc. */

		/* Write Value field */
		if (cmd == SCH56XX_CMD_WRITE)
		outb(v, addr + 4);

		/* Write Address field */
		outb(reg & 0xff, addr + 6);
		outb(reg >> 8, addr + 7);

		/* Execute the Random Access Command */
		outb(0x01, addr); /* Write 01h to the Host-to-EC register */

		/* EM Interface Polling "Algorithm" */
		for (i = 0; i < max_busy_polls + max_lazy_polls; i++) {
		if (i >= max_busy_polls)
		msleep(1);
		/* Read Interrupt source Register */
		val = inb(addr + 8);
		/* Write Clear the interrupt source bits */
		if (val)
		outb(val, addr + 8);
		/* Command Completed ? */
		if (val & 0x01)
		break;
		}
		if (i == max_busy_polls + max_lazy_polls) {
		pr_err("Max retries exceeded reading virtual "
		"register 0x%04hx (%d)\n", reg, 1);
		return -EIO;
		}

		/*
		* According to SMSC we may need to retry this, but sofar I've always
		* seen this succeed in 1 try.
		*/
		for (i = 0; i < max_busy_polls; i++) {
		/* Read EC-to-Host Register */
		val = inb(addr + 1);
		/* Command Completed ? */
		if (val == 0x01)
		break;

		if (i == 0)
		pr_warn("EC reports: 0x%02x reading virtual register "
		"0x%04hx\n", (unsigned int)val, reg);
		}
		if (i == max_busy_polls) {
		pr_err("Max retries exceeded reading virtual "
		"register 0x%04hx (%d)\n", reg, 2);
		return -EIO;
		}

		/*
		* According to the SMSC app note we should now do:
		*
		* Set Mailbox Address Pointer to first location in Region 1 *
		* outb(0x00, addr + 2);
		* outb(0x80, addr + 3);
		*
		* But if we do that things don't work, so let's not.
		*/

		/* Read Value field */
		if (cmd == SCH56XX_CMD_READ)
		return inb(addr + 4);

		return 0;
		}

		int sch56xx_read_virtual_reg(u16 addr, u16 reg)
		{
		return sch56xx_send_cmd(addr, SCH56XX_CMD_READ, reg, 0);
		}
		EXPORT_SYMBOL(sch56xx_read_virtual_reg);

		int sch56xx_write_virtual_reg(u16 addr, u16 reg, u8 val)
		{
		return sch56xx_send_cmd(addr, SCH56XX_CMD_WRITE, reg, val);
		}
		EXPORT_SYMBOL(sch56xx_write_virtual_reg);

		int sch56xx_read_virtual_reg16(u16 addr, u16 reg)
		{
		int lsb, msb;

		/* Read LSB first, this will cause the matching MSB to be latched */
		lsb = sch56xx_read_virtual_reg(addr, reg);
		if (lsb < 0)
		return lsb;

		msb = sch56xx_read_virtual_reg(addr, reg + 1);
		if (msb < 0)
		return msb;

		return lsb \| (msb << 8);
		}
		EXPORT_SYMBOL(sch56xx_read_virtual_reg16);

		int sch56xx_read_virtual_reg12(u16 addr, u16 msb_reg, u16 lsn_reg,
		int high_nibble)
		{
		int msb, lsn;

		/* Read MSB first, this will cause the matching LSN to be latched */
		msb = sch56xx_read_virtual_reg(addr, msb_reg);
		if (msb < 0)
		return msb;

		lsn = sch56xx_read_virtual_reg(addr, lsn_reg);
		if (lsn < 0)
		return lsn;

		if (high_nibble)
		return (msb << 4) \| (lsn >> 4);
		else
		return (msb << 4) \| (lsn & 0x0f);
		}
		EXPORT_SYMBOL(sch56xx_read_virtual_reg12);

		static int __init sch56xx_find(int sioaddr, unsigned short *address,
		const char **name)
		{
		u8 devid;
		int err;

		err = superio_enter(sioaddr);
		if (err)
		return err;

		devid = superio_inb(sioaddr, SIO_REG_DEVID);
		switch (devid) {
		case SIO_SCH5627_ID:
		*name = "sch5627";
		break;
		default:
		pr_debug("Unsupported device id: 0x%02x\n",
		(unsigned int)devid);
		err = -ENODEV;
		goto exit;
		}

		superio_select(sioaddr, SIO_SCH56XX_LD_EM);

		if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
		pr_warn("Device not activated\n");
		err = -ENODEV;
		goto exit;
		}

		/*
		* Warning the order of the low / high byte is the other way around
		* as on most other superio devices!!
		*/
		*address = superio_inb(sioaddr, SIO_REG_ADDR) \|
		superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8;
		if (*address == 0) {
		pr_warn("Base address not set\n");
		err = -ENODEV;
		goto exit;
		}

		exit:
		superio_exit(sioaddr);
		return err;
		}

		static int __init sch56xx_device_add(unsigned short address, const char *name)
		{
		struct resource res = {
		.start = address,
		.end = address + REGION_LENGTH - 1,
		.flags = IORESOURCE_IO,
		};
		int err;

		sch56xx_pdev = platform_device_alloc(name, address);
		if (!sch56xx_pdev)
		return -ENOMEM;

		res.name = sch56xx_pdev->name;
		err = acpi_check_resource_conflict(&res);
		if (err)
		goto exit_device_put;

		err = platform_device_add_resources(sch56xx_pdev, &res, 1);
		if (err) {
		pr_err("Device resource addition failed\n");
		goto exit_device_put;
		}

		err = platform_device_add(sch56xx_pdev);
		if (err) {
		pr_err("Device addition failed\n");
		goto exit_device_put;
		}

		return 0;

		exit_device_put:
		platform_device_put(sch56xx_pdev);

		return err;
		}

		static int __init sch56xx_init(void)
		{
		int err;
		unsigned short address;
		const char *name;

		err = sch56xx_find(0x4e, &address, &name);
		if (err)
		err = sch56xx_find(0x2e, &address, &name);
		if (err)
		return err;

		return sch56xx_device_add(address, name);
		}

		static void __exit sch56xx_exit(void)
		{
		platform_device_unregister(sch56xx_pdev);
		}

		MODULE_DESCRIPTION("SMSC SCH56xx Hardware Monitoring Common Code");
		MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
		MODULE_LICENSE("GPL");

		module_init(sch56xx_init);
		module_exit(sch56xx_exit);

drivers/hwmon/sch56xx-common.h

0 → 100644

+24 −0

Original line number	Diff line number	Diff line
		/***************************************************************************
		* Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com> *
		* *
		* 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. *
		***************************************************************************/

		int sch56xx_read_virtual_reg(u16 addr, u16 reg);
		int sch56xx_write_virtual_reg(u16 addr, u16 reg, u8 val);
		int sch56xx_read_virtual_reg16(u16 addr, u16 reg);
		int sch56xx_read_virtual_reg12(u16 addr, u16 msb_reg, u16 lsn_reg,
		int high_nibble);