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linux-next/drivers/i2c/busses/i2c-nforce2.c
Kees Cook 6396bb2215 treewide: kzalloc() -> kcalloc() 
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:

        kzalloc(a * b, gfp)

with:
        kcalloc(a * b, gfp)

as well as handling cases of:

        kzalloc(a * b * c, gfp)

with:

        kzalloc(array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        kzalloc_array(array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        kzalloc(4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@

(
  kzalloc(
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  kzalloc(
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  kzalloc(
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@

- kzalloc
+ kcalloc
  (
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  kzalloc(
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  kzalloc(
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@

(
  kzalloc(
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  kzalloc(sizeof(THING) * C2, ...)
|
  kzalloc(sizeof(TYPE) * C2, ...)
|
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * E2
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 16:19:22 -07:00

451 lines
12 KiB
C
Raw Blame History

/*
SMBus driver for nVidia nForce2 MCP
Added nForce3 Pro 150 Thomas Leibold <thomas@plx.com>,
Ported to 2.5 Patrick Dreker <patrick@dreker.de>,
Copyright (c) 2003 Hans-Frieder Vogt <hfvogt@arcor.de>,
Based on
SMBus 2.0 driver for AMD-8111 IO-Hub
Copyright (c) 2002 Vojtech Pavlik
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.
*/
/*
SUPPORTED DEVICES PCI ID
nForce2 MCP 0064
nForce2 Ultra 400 MCP 0084
nForce3 Pro150 MCP 00D4
nForce3 250Gb MCP 00E4
nForce4 MCP 0052
nForce4 MCP-04 0034
nForce MCP51 0264
nForce MCP55 0368
nForce MCP61 03EB
nForce MCP65 0446
nForce MCP67 0542
nForce MCP73 07D8
nForce MCP78S 0752
nForce MCP79 0AA2
This driver supports the 2 SMBuses that are included in the MCP of the
nForce2/3/4/5xx chipsets.
*/
/* Note: we assume there can only be one nForce2, with two SMBus interfaces */
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/ioport.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <linux/io.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>");
MODULE_DESCRIPTION("nForce2/3/4/5xx SMBus driver");
struct nforce2_smbus {
struct i2c_adapter adapter;
int base;
int size;
int blockops;
int can_abort;
};
/*
* nVidia nForce2 SMBus control register definitions
* (Newer incarnations use standard BARs 4 and 5 instead)
*/
#define NFORCE_PCI_SMB1 0x50
#define NFORCE_PCI_SMB2 0x54
/*
* ACPI 2.0 chapter 13 SMBus 2.0 EC register model
*/
#define NVIDIA_SMB_PRTCL (smbus->base + 0x00) /* protocol, PEC */
#define NVIDIA_SMB_STS (smbus->base + 0x01) /* status */
#define NVIDIA_SMB_ADDR (smbus->base + 0x02) /* address */
#define NVIDIA_SMB_CMD (smbus->base + 0x03) /* command */
#define NVIDIA_SMB_DATA (smbus->base + 0x04) /* 32 data registers */
#define NVIDIA_SMB_BCNT (smbus->base + 0x24) /* number of data
bytes */
#define NVIDIA_SMB_STATUS_ABRT (smbus->base + 0x3c) /* register used to
check the status of
the abort command */
#define NVIDIA_SMB_CTRL (smbus->base + 0x3e) /* control register */
#define NVIDIA_SMB_STATUS_ABRT_STS 0x01 /* Bit to notify that
abort succeeded */
#define NVIDIA_SMB_CTRL_ABORT 0x20
#define NVIDIA_SMB_STS_DONE 0x80
#define NVIDIA_SMB_STS_ALRM 0x40
#define NVIDIA_SMB_STS_RES 0x20
#define NVIDIA_SMB_STS_STATUS 0x1f
#define NVIDIA_SMB_PRTCL_WRITE 0x00
#define NVIDIA_SMB_PRTCL_READ 0x01
#define NVIDIA_SMB_PRTCL_QUICK 0x02
#define NVIDIA_SMB_PRTCL_BYTE 0x04
#define NVIDIA_SMB_PRTCL_BYTE_DATA 0x06
#define NVIDIA_SMB_PRTCL_WORD_DATA 0x08
#define NVIDIA_SMB_PRTCL_BLOCK_DATA 0x0a
#define NVIDIA_SMB_PRTCL_PEC 0x80
/* Misc definitions */
#define MAX_TIMEOUT 100
/* We disable the second SMBus channel on these boards */
static const struct dmi_system_id nforce2_dmi_blacklist2[] = {
{
.ident = "DFI Lanparty NF4 Expert",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "DFI Corp,LTD"),
DMI_MATCH(DMI_BOARD_NAME, "LP UT NF4 Expert"),
},
},
{ }
};
static struct pci_driver nforce2_driver;
/* For multiplexing support, we need a global reference to the 1st
SMBus channel */
#if IS_ENABLED(CONFIG_I2C_NFORCE2_S4985)
struct i2c_adapter *nforce2_smbus;
EXPORT_SYMBOL_GPL(nforce2_smbus);
static void nforce2_set_reference(struct i2c_adapter *adap)
{
nforce2_smbus = adap;
}
#else
static inline void nforce2_set_reference(struct i2c_adapter *adap) { }
#endif
static void nforce2_abort(struct i2c_adapter *adap)
{
struct nforce2_smbus *smbus = adap->algo_data;
int timeout = 0;
unsigned char temp;
dev_dbg(&adap->dev, "Aborting current transaction\n");
outb_p(NVIDIA_SMB_CTRL_ABORT, NVIDIA_SMB_CTRL);
do {
msleep(1);
temp = inb_p(NVIDIA_SMB_STATUS_ABRT);
} while (!(temp & NVIDIA_SMB_STATUS_ABRT_STS) &&
(timeout++ < MAX_TIMEOUT));
if (!(temp & NVIDIA_SMB_STATUS_ABRT_STS))
dev_err(&adap->dev, "Can't reset the smbus\n");
outb_p(NVIDIA_SMB_STATUS_ABRT_STS, NVIDIA_SMB_STATUS_ABRT);
}
static int nforce2_check_status(struct i2c_adapter *adap)
{
struct nforce2_smbus *smbus = adap->algo_data;
int timeout = 0;
unsigned char temp;
do {
msleep(1);
temp = inb_p(NVIDIA_SMB_STS);
} while ((!temp) && (timeout++ < MAX_TIMEOUT));
if (timeout > MAX_TIMEOUT) {
dev_dbg(&adap->dev, "SMBus Timeout!\n");
if (smbus->can_abort)
nforce2_abort(adap);
return -ETIMEDOUT;
}
if (!(temp & NVIDIA_SMB_STS_DONE) || (temp & NVIDIA_SMB_STS_STATUS)) {
dev_dbg(&adap->dev, "Transaction failed (0x%02x)!\n", temp);
return -EIO;
}
return 0;
}
/* Return negative errno on error */
static s32 nforce2_access(struct i2c_adapter *adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size, union i2c_smbus_data *data)
{
struct nforce2_smbus *smbus = adap->algo_data;
unsigned char protocol, pec;
u8 len;
int i, status;
protocol = (read_write == I2C_SMBUS_READ) ? NVIDIA_SMB_PRTCL_READ :
NVIDIA_SMB_PRTCL_WRITE;
pec = (flags & I2C_CLIENT_PEC) ? NVIDIA_SMB_PRTCL_PEC : 0;
switch (size) {
case I2C_SMBUS_QUICK:
protocol |= NVIDIA_SMB_PRTCL_QUICK;
read_write = I2C_SMBUS_WRITE;
break;
case I2C_SMBUS_BYTE:
if (read_write == I2C_SMBUS_WRITE)
outb_p(command, NVIDIA_SMB_CMD);
protocol |= NVIDIA_SMB_PRTCL_BYTE;
break;
case I2C_SMBUS_BYTE_DATA:
outb_p(command, NVIDIA_SMB_CMD);
if (read_write == I2C_SMBUS_WRITE)
outb_p(data->byte, NVIDIA_SMB_DATA);
protocol |= NVIDIA_SMB_PRTCL_BYTE_DATA;
break;
case I2C_SMBUS_WORD_DATA:
outb_p(command, NVIDIA_SMB_CMD);
if (read_write == I2C_SMBUS_WRITE) {
outb_p(data->word, NVIDIA_SMB_DATA);
outb_p(data->word >> 8, NVIDIA_SMB_DATA + 1);
}
protocol |= NVIDIA_SMB_PRTCL_WORD_DATA | pec;
break;
case I2C_SMBUS_BLOCK_DATA:
outb_p(command, NVIDIA_SMB_CMD);
if (read_write == I2C_SMBUS_WRITE) {
len = data->block[0];
if ((len == 0) || (len > I2C_SMBUS_BLOCK_MAX)) {
dev_err(&adap->dev,
"Transaction failed (requested block size: %d)\n",
len);
return -EINVAL;
}
outb_p(len, NVIDIA_SMB_BCNT);
for (i = 0; i < I2C_SMBUS_BLOCK_MAX; i++)
outb_p(data->block[i + 1],
NVIDIA_SMB_DATA + i);
}
protocol |= NVIDIA_SMB_PRTCL_BLOCK_DATA | pec;
break;
default:
dev_err(&adap->dev, "Unsupported transaction %d\n", size);
return -EOPNOTSUPP;
}
outb_p((addr & 0x7f) << 1, NVIDIA_SMB_ADDR);
outb_p(protocol, NVIDIA_SMB_PRTCL);
status = nforce2_check_status(adap);
if (status)
return status;
if (read_write == I2C_SMBUS_WRITE)
return 0;
switch (size) {
case I2C_SMBUS_BYTE:
case I2C_SMBUS_BYTE_DATA:
data->byte = inb_p(NVIDIA_SMB_DATA);
break;
case I2C_SMBUS_WORD_DATA:
data->word = inb_p(NVIDIA_SMB_DATA) |
(inb_p(NVIDIA_SMB_DATA + 1) << 8);
break;
case I2C_SMBUS_BLOCK_DATA:
len = inb_p(NVIDIA_SMB_BCNT);
if ((len <= 0) || (len > I2C_SMBUS_BLOCK_MAX)) {
dev_err(&adap->dev,
"Transaction failed (received block size: 0x%02x)\n",
len);
return -EPROTO;
}
for (i = 0; i < len; i++)
data->block[i + 1] = inb_p(NVIDIA_SMB_DATA + i);
data->block[0] = len;
break;
}
return 0;
}
static u32 nforce2_func(struct i2c_adapter *adapter)
{
/* other functionality might be possible, but is not tested */
return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_PEC |
(((struct nforce2_smbus *)adapter->algo_data)->blockops ?
I2C_FUNC_SMBUS_BLOCK_DATA : 0);
}
static const struct i2c_algorithm smbus_algorithm = {
.smbus_xfer = nforce2_access,
.functionality = nforce2_func,
};
static const struct pci_device_id nforce2_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE4_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP78S_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP79_SMBUS) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, nforce2_ids);
static int nforce2_probe_smb(struct pci_dev *dev, int bar, int alt_reg,
struct nforce2_smbus *smbus, const char *name)
{
int error;
smbus->base = pci_resource_start(dev, bar);
if (smbus->base) {
smbus->size = pci_resource_len(dev, bar);
} else {
/* Older incarnations of the device used non-standard BARs */
u16 iobase;
if (pci_read_config_word(dev, alt_reg, &iobase)
!= PCIBIOS_SUCCESSFUL) {
dev_err(&dev->dev, "Error reading PCI config for %s\n",
name);
return -EIO;
}
smbus->base = iobase & PCI_BASE_ADDRESS_IO_MASK;
smbus->size = 64;
}
error = acpi_check_region(smbus->base, smbus->size,
nforce2_driver.name);
if (error)
return error;
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);
return -EBUSY;
}
smbus->adapter.owner = THIS_MODULE;
smbus->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
smbus->adapter.algo = &smbus_algorithm;
smbus->adapter.algo_data = smbus;
smbus->adapter.dev.parent = &dev->dev;
snprintf(smbus->adapter.name, sizeof(smbus->adapter.name),
"SMBus nForce2 adapter at %04x", smbus->base);
error = i2c_add_adapter(&smbus->adapter);
if (error) {
release_region(smbus->base, smbus->size);
return error;
}
dev_info(&smbus->adapter.dev, "nForce2 SMBus adapter at %#x\n",
smbus->base);
return 0;
}
static int nforce2_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
struct nforce2_smbus *smbuses;
int res1, res2;
/* we support 2 SMBus adapters */
smbuses = kcalloc(2, sizeof(struct nforce2_smbus), GFP_KERNEL);
if (!smbuses)
return -ENOMEM;
pci_set_drvdata(dev, smbuses);
switch (dev->device) {
case PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS:
case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SMBUS:
case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SMBUS:
smbuses[0].blockops = 1;
smbuses[1].blockops = 1;
smbuses[0].can_abort = 1;
smbuses[1].can_abort = 1;
}
/* SMBus adapter 1 */
res1 = nforce2_probe_smb(dev, 4, NFORCE_PCI_SMB1, &smbuses[0], "SMB1");
if (res1 < 0)
smbuses[0].base = 0; /* to have a check value */
/* SMBus adapter 2 */
if (dmi_check_system(nforce2_dmi_blacklist2)) {
dev_err(&dev->dev, "Disabling SMB2 for safety reasons.\n");
res2 = -EPERM;
smbuses[1].base = 0;
} else {
res2 = nforce2_probe_smb(dev, 5, NFORCE_PCI_SMB2, &smbuses[1],
"SMB2");
if (res2 < 0)
smbuses[1].base = 0; /* to have a check value */
}
if ((res1 < 0) && (res2 < 0)) {
/* we did not find even one of the SMBuses, so we give up */
kfree(smbuses);
return -ENODEV;
}
nforce2_set_reference(&smbuses[0].adapter);
return 0;
}
static void nforce2_remove(struct pci_dev *dev)
{
struct nforce2_smbus *smbuses = pci_get_drvdata(dev);
nforce2_set_reference(NULL);
if (smbuses[0].base) {
i2c_del_adapter(&smbuses[0].adapter);
release_region(smbuses[0].base, smbuses[0].size);
}
if (smbuses[1].base) {
i2c_del_adapter(&smbuses[1].adapter);
release_region(smbuses[1].base, smbuses[1].size);
}
kfree(smbuses);
}
static struct pci_driver nforce2_driver = {
.name = "nForce2_smbus",
.id_table = nforce2_ids,
.probe = nforce2_probe,
.remove = nforce2_remove,
};
module_pci_driver(nforce2_driver);
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