nForce3 250Gb MCP 00E4
nForce4 MCP 0052
nForce4 MCP-04 0034
- nForce4 MCP51 0264
- nForce4 MCP55 0368
+ 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.
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
-#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
+#include <linux/dmi.h>
+#include <linux/acpi.h>
#include <asm/io.h>
MODULE_LICENSE("GPL");
struct i2c_adapter adapter;
int base;
int size;
+ int blockops;
+ int can_abort;
};
#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_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 struct dmi_system_id __devinitdata 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;
-/* Return -1 on error */
+/* For multiplexing support, we need a global reference to the 1st
+ SMBus channel */
+#if defined CONFIG_I2C_NFORCE2_S4985 || defined CONFIG_I2C_NFORCE2_S4985_MODULE
+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, temp;
+ unsigned char protocol, pec;
+ u8 len;
+ int i, status;
protocol = (read_write == I2C_SMBUS_READ) ? NVIDIA_SMB_PRTCL_READ :
NVIDIA_SMB_PRTCL_WRITE;
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 -1;
+ return -EOPNOTSUPP;
}
outb_p((addr & 0x7f) << 1, NVIDIA_SMB_ADDR);
outb_p(protocol, NVIDIA_SMB_PRTCL);
- temp = inb_p(NVIDIA_SMB_STS);
-
- if (~temp & NVIDIA_SMB_STS_DONE) {
- udelay(500);
- temp = inb_p(NVIDIA_SMB_STS);
- }
- if (~temp & NVIDIA_SMB_STS_DONE) {
- msleep(10);
- temp = inb_p(NVIDIA_SMB_STS);
- }
-
- if ((~temp & NVIDIA_SMB_STS_DONE) || (temp & NVIDIA_SMB_STS_STATUS)) {
- dev_dbg(&adap->dev, "SMBus Timeout! (0x%02x)\n", temp);
- return -1;
- }
+ status = nforce2_check_status(adap);
+ if (status)
+ return status;
if (read_write == I2C_SMBUS_WRITE)
return 0;
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;
{
/* 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_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 struct i2c_algorithm smbus_algorithm = {
{ 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 }
};
!= PCIBIOS_SUCCESSFUL) {
dev_err(&dev->dev, "Error reading PCI config for %s\n",
name);
- return -1;
+ 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 -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);
- return -1;
+ return -EBUSY;
}
smbus->adapter.owner = THIS_MODULE;
- smbus->adapter.class = I2C_CLASS_HWMON;
+ 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, I2C_NAME_SIZE,
+ snprintf(smbus->adapter.name, sizeof(smbus->adapter.name),
"SMBus nForce2 adapter at %04x", smbus->base);
error = i2c_add_adapter(&smbus->adapter);
if (error) {
dev_err(&smbus->adapter.dev, "Failed to register adapter.\n");
release_region(smbus->base, smbus->size);
- return -1;
+ return error;
}
dev_info(&smbus->adapter.dev, "nForce2 SMBus adapter at %#x\n", smbus->base);
return 0;
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 */
- res2 = nforce2_probe_smb(dev, 5, NFORCE_PCI_SMB2, &smbuses[1], "SMB2");
- if (res2 < 0) {
- dev_err(&dev->dev, "Error probing SMB2.\n");
- smbuses[1].base = 0; /* to have a check value */
+ 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) {
+ dev_err(&dev->dev, "Error probing SMB2.\n");
+ 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 */
return -ENODEV;
}
+ nforce2_set_reference(&smbuses[0].adapter);
return 0;
}
{
struct nforce2_smbus *smbuses = (void*) 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);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff