hwmon: (sch5627) Factor out some code shared with sch5636 driver
This patch adds a new sch56xx-common.ko which contains code which will also
be used in the new sch5636 driver.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 5f888f7..0ed7677 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1041,8 +1041,13 @@
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.
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 28061cf..ae59bca 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -95,6 +95,7 @@
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
diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
index 3494a4c..e3b5c60 100644
--- a/drivers/hwmon/sch5627.c
+++ b/drivers/hwmon/sch5627.c
@@ -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 @@
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 @@
/* 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 @@
/* 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 @@
}
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 @@
}
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 @@
* 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 @@
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 @@
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 @@
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 @@
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 @@
}
/* 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 @@
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 @@
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 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);
}
diff --git a/drivers/hwmon/sch56xx-common.c b/drivers/hwmon/sch56xx-common.c
new file mode 100644
index 0000000..a579313
--- /dev/null
+++ b/drivers/hwmon/sch56xx-common.c
@@ -0,0 +1,336 @@
+/***************************************************************************
+ * 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);
diff --git a/drivers/hwmon/sch56xx-common.h b/drivers/hwmon/sch56xx-common.h
new file mode 100644
index 0000000..d5eaf3b9
--- /dev/null
+++ b/drivers/hwmon/sch56xx-common.h
@@ -0,0 +1,24 @@
+/***************************************************************************
+ * 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);
