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i2c: Check for ACPI resource conflicts

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Check for ACPI resource conflicts in i2c bus drivers. I've included
all recent SMBus master drivers for PC hardware.

I've voluntarily left out:
* Drivers that don't run on PCs: they can't conflict with ACPI.
* Bit-banged bus device drivers: it's very unlikely that ACPI would
  deal with such buses.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
This commit is contained in:
Jean Delvare 2008-07-14 22:38:33 +02:00 committed by Jean Delvare
parent 2373c1801a
commit 54fb4a05af
13 changed files with 67 additions and 0 deletions
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6
drivers/i2c/busses/i2c-ali1535.c
View File

@ -61,6 +61,7 @@
#include <linux/ioport.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <asm/io.h>
@ -159,6 +160,11 @@ static int ali1535_setup(struct pci_dev *dev)
goto exit;
}
retval = acpi_check_region(ali1535_smba, ALI1535_SMB_IOSIZE,
ali1535_driver.name);
if (retval)
goto exit;
if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE,
ali1535_driver.name)) {
dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n",

5
drivers/i2c/busses/i2c-ali1563.c
View File

@ -21,6 +21,7 @@
#include <linux/i2c.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/acpi.h>
#define ALI1563_MAX_TIMEOUT 500
#define ALI1563_SMBBA 0x80
@ -356,6 +357,10 @@ static int __devinit ali1563_setup(struct pci_dev * dev)
}
}
if (acpi_check_region(ali1563_smba, ALI1563_SMB_IOSIZE,
ali1563_pci_driver.name))
goto Err;
if (!request_region(ali1563_smba, ALI1563_SMB_IOSIZE,
ali1563_pci_driver.name)) {
dev_err(&dev->dev, "Could not allocate I/O space at 0x%04x\n",

5
drivers/i2c/busses/i2c-ali15x3.c
View File

@ -68,6 +68,7 @@
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <asm/io.h>
/* ALI15X3 SMBus address offsets */
@ -166,6 +167,10 @@ static int ali15x3_setup(struct pci_dev *ALI15X3_dev)
if(force_addr)
ali15x3_smba = force_addr & ~(ALI15X3_SMB_IOSIZE - 1);
if (acpi_check_region(ali15x3_smba, ALI15X3_SMB_IOSIZE,
ali15x3_driver.name))
return -EBUSY;
if (!request_region(ali15x3_smba, ALI15X3_SMB_IOSIZE,
ali15x3_driver.name)) {
dev_err(&ALI15X3_dev->dev,

6
drivers/i2c/busses/i2c-amd756.c
View File

@ -45,6 +45,7 @@
#include <linux/ioport.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <asm/io.h>
/* AMD756 SMBus address offsets */
@ -368,6 +369,11 @@ static int __devinit amd756_probe(struct pci_dev *pdev,
amd756_ioport += SMB_ADDR_OFFSET;
}
error = acpi_check_region(amd756_ioport, SMB_IOSIZE,
amd756_driver.name);
if (error)
return error;
if (!request_region(amd756_ioport, SMB_IOSIZE, amd756_driver.name)) {
dev_err(&pdev->dev, "SMB region 0x%x already in use!\n",
amd756_ioport);

5
drivers/i2c/busses/i2c-amd8111.c
View File

@ -16,6 +16,7 @@
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/acpi.h>
#include <asm/io.h>
MODULE_LICENSE("GPL");
@ -374,6 +375,10 @@ static int __devinit amd8111_probe(struct pci_dev *dev,
smbus->base = pci_resource_start(dev, 0);
smbus->size = pci_resource_len(dev, 0);
error = acpi_check_resource_conflict(&dev->resource[0]);
if (error)
goto out_kfree;
if (!request_region(smbus->base, smbus->size, amd8111_driver.name)) {
error = -EBUSY;
goto out_kfree;

5
drivers/i2c/busses/i2c-i801.c
View File

@ -64,6 +64,7 @@
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <asm/io.h>
/* I801 SMBus address offsets */
@ -624,6 +625,10 @@ static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id
goto exit;
}
err = acpi_check_resource_conflict(&dev->resource[SMBBAR]);
if (err)
goto exit;
err = pci_request_region(dev, SMBBAR, i801_driver.name);
if (err) {
dev_err(&dev->dev, "Failed to request SMBus region "

3
drivers/i2c/busses/i2c-isch.c
View File

@ -35,6 +35,7 @@
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/acpi.h>
/* SCH SMBus address offsets */
#define SMBHSTCNT (0 + sch_smba)
@ -279,6 +280,8 @@ static int __devinit sch_probe(struct pci_dev *dev,
dev_err(&dev->dev, "SMBus base address uninitialized!\n");
return -ENODEV;
}
if (acpi_check_region(sch_smba, SMBIOSIZE, sch_driver.name))
return -EBUSY;
if (!request_region(sch_smba, SMBIOSIZE, sch_driver.name)) {
dev_err(&dev->dev, "SMBus region 0x%x already in use!\n",
sch_smba);

6
drivers/i2c/busses/i2c-nforce2.c
View File

@ -51,6 +51,7 @@
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/acpi.h>
#include <asm/io.h>
MODULE_LICENSE("GPL");
@ -343,6 +344,11 @@ static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar,
smbus->size = 64;
}
error = acpi_check_region(smbus->base, smbus->size,
nforce2_driver.name);
if (error)
return -1;
if (!request_region(smbus->base, smbus->size, nforce2_driver.name)) {
dev_err(&smbus->adapter.dev, "Error requesting region %02x .. %02X for %s\n",
smbus->base, smbus->base+smbus->size-1, name);

4
drivers/i2c/busses/i2c-piix4.c
View File

@ -39,6 +39,7 @@
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/dmi.h>
#include <linux/acpi.h>
#include <asm/io.h>
@ -168,6 +169,9 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
}
}
if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
return -EBUSY;
if (!request_region(piix4_smba, SMBIOSIZE, piix4_driver.name)) {
dev_err(&PIIX4_dev->dev, "SMBus region 0x%x already in use!\n",
piix4_smba);

6
drivers/i2c/busses/i2c-sis5595.c
View File

@ -62,6 +62,7 @@
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <asm/io.h>
static int blacklist[] = {
@ -174,6 +175,11 @@ static int sis5595_setup(struct pci_dev *SIS5595_dev)
/* NB: We grab just the two SMBus registers here, but this may still
* interfere with ACPI :-( */
retval = acpi_check_region(sis5595_base + SMB_INDEX, 2,
sis5595_driver.name);
if (retval)
return retval;
if (!request_region(sis5595_base + SMB_INDEX, 2,
sis5595_driver.name)) {
dev_err(&SIS5595_dev->dev, "SMBus registers 0x%04x-0x%04x already in use!\n",

6
drivers/i2c/busses/i2c-sis630.c
View File

@ -55,6 +55,7 @@
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <asm/io.h>
/* SIS630 SMBus registers */
@ -437,6 +438,11 @@ static int sis630_setup(struct pci_dev *sis630_dev)
dev_dbg(&sis630_dev->dev, "ACPI base at 0x%04x\n", acpi_base);
retval = acpi_check_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION,
sis630_driver.name);
if (retval)
goto exit;
/* Everything is happy, let's grab the memory and set things up. */
if (!request_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION,
sis630_driver.name)) {

5
drivers/i2c/busses/i2c-sis96x.c
View File

@ -40,6 +40,7 @@
#include <linux/ioport.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <asm/io.h>
/* base address register in PCI config space */
@ -281,6 +282,10 @@ static int __devinit sis96x_probe(struct pci_dev *dev,
dev_info(&dev->dev, "SiS96x SMBus base address: 0x%04x\n",
sis96x_smbus_base);
retval = acpi_check_resource_conflict(&dev->resource[SIS96x_BAR]);
if (retval)
return retval;
/* Everything is happy, let's grab the memory and set things up. */
if (!request_region(sis96x_smbus_base, SMB_IOSIZE,
sis96x_driver.name)) {

5
drivers/i2c/busses/i2c-viapro.c
View File

@ -50,6 +50,7 @@
#include <linux/ioport.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <asm/io.h>
static struct pci_dev *vt596_pdev;
@ -356,6 +357,10 @@ static int __devinit vt596_probe(struct pci_dev *pdev,
}
found:
error = acpi_check_region(vt596_smba, 8, vt596_driver.name);
if (error)
return error;
if (!request_region(vt596_smba, 8, vt596_driver.name)) {
dev_err(&pdev->dev, "SMBus region 0x%x already in use!\n",
vt596_smba);