thank you very much.
checked in.
Hans-Frieder Vogt wrote:
> (resend because of errorneous sender identity in first e-mail)
> Hello,
>
> I just wrote a driver for the SMBus (more precise: the SMBuses) in the nVidia
> nForce2 southbridge (based on the AMD-8111 driver). It runs both with version
> 2.6.5 and with CVS. Although it is not very well tested, it runs perfectly on
> my computer and I think it might be useful for others as well. Please include
> it in lm_sensors.
>
> Cheers,
> Hans-Frieder
> --
> --
> Hans-Frieder Vogt e-mail: hfvogt at arcor.de
>
>
> ------------------------------------------------------------------------
>
> Kernel driver `i2c-nforce2.o'
>
> Status: Beta, although no problems found during one month usage with hwsensor
>
> Supported adapters:
> * nVidia nForce2 SMBus PCI interface (10de:0064, included in nForce2 MCP)
> Datasheet: not publically available, but seems to be similar to the
> AMD-8111 SMBus 2.0 adapter.
>
> Author: Hans-Frieder Vogt <hfvogt at arcor.de>
>
>
> Module Parameters
> -----------------
>
> None.
>
>
> Description
> -----------
>
> i2c-nforce2 is a driver for the SMBuses included in the nVidia nForce2 MCP.
>
> If your 'lspci -v' listing shows something like the following,
>
> 00:01.1 SMBus: nVidia Corporation: Unknown device 0064 (rev a2)
> Subsystem: Asustek Computer, Inc.: Unknown device 0c11
> Flags: 66Mhz, fast devsel, IRQ 5
> I/O ports at c000 [size=32]
> Capabilities: <available only to root>
>
> then this driver should support the SMBuses of your motherboard.
>
>
> Notes
> -----
>
> The SMBus adapter in the nForce2 chipset seems to be very similar to the
> SMBus 2.0 adapter in the AMD-8111 southbridge. However, I could only get the
> driver to work with direct I/O access, which is different to the EC interface
> of the AMD-8111.
> Tested on Asus A7N8X. The ACPI DSDT table of the Asus A7N8X lists two SMBuses,
> both of which are supported by this driver.
>
>
> ------------------------------------------------------------------------
>
> /*
> SMBus driver for nVidia nForce2 MCP
>
> Copyright (c) 2003 Hans-Frieder Vogt <hfvogt at 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.
>
> 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., 675 Mass Ave, Cambridge, MA 02139, USA.
> */
>
> /*
> SUPPORTED DEVICES PCI ID
> nForce2 MCP 0064
>
> This driver supports the 2 SMBuses that are included in the MCP2 of the
> nForce2 chipset.
> */
>
> /* 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/sched.h>
> #include <linux/ioport.h>
> #include <linux/init.h>
> #include <linux/i2c.h>
> #include <linux/delay.h>
> #include <asm/io.h>
> #include "version.h"
>
> #ifdef MODULE_LICENSE
> MODULE_LICENSE("GPL");
> #endif
> MODULE_AUTHOR ("Hans-Frieder Vogt <hfvogt at arcor.de>");
> MODULE_DESCRIPTION("nForce2 SMBus driver");
>
> #ifndef PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS
> #define PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS 0x0064
> #endif
> /* TODO: sync with lm-sensors */
> #ifndef I2C_HW_SMBUS_NFORCE2
> #define I2C_HW_SMBUS_NFORCE2 0x0c
> #endif
>
>
> struct nforce2_smbus {
> struct pci_dev *dev;
> struct i2c_adapter adapter;
> int base;
> int size;
> };
>
>
> /*
> * nVidia nForce2 SMBus control register definitions
> */
> #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_ALRM_A (smbus->base + 0x25) /* alarm address */
> #define NVIDIA_SMB_ALRM_D (smbus->base + 0x26) /* 2 bytes alarm data */
>
> #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_PROC_CALL 0x0c
> #define NVIDIA_SMB_PRTCL_BLOCK_PROC_CALL 0x0d
> #define NVIDIA_SMB_PRTCL_I2C_BLOCK_DATA 0x4a
> #define NVIDIA_SMB_PRTCL_PEC 0x80
>
>
> /* Other settings */
> #define MAX_TIMEOUT 256
>
>
>
> 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);
> static void nforce2_do_pause(unsigned int amount);
> /*
> static int nforce2_block_transaction(union i2c_smbus_data *data,
> char read_write, int i2c_enable);
> */
> static u32 nforce2_func(struct i2c_adapter *adapter);
>
>
> static struct i2c_algorithm smbus_algorithm = {
> .name = "Non-I2C SMBus adapter",
> .id = I2C_ALGO_SMBUS,
> .smbus_xfer = nforce2_access,
> .functionality = nforce2_func,
> };
>
>
>
> /* Internally used pause function */
> void nforce2_do_pause(unsigned int amount)
> {
> current->state = TASK_INTERRUPTIBLE;
> schedule_timeout(amount);
> }
>
>
> /* Return -1 on error. See smbus.h for more information */
> 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, len, pec, temp;
> int timeout = 0;
> int i;
>
> 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(data->byte, NVIDIA_SMB_DATA);
> 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 = min_t(u8, data->block[0], 32);
> outb_p(len, NVIDIA_SMB_BCNT);
> for (i = 0; i < len; i++)
> outb_p(data->block[i + 1], NVIDIA_SMB_DATA+i);
> }
> protocol |= NVIDIA_SMB_PRTCL_BLOCK_DATA | pec;
> break;
>
> case I2C_SMBUS_I2C_BLOCK_DATA:
> len = min_t(u8, data->block[0], 32);
> outb_p(command, NVIDIA_SMB_CMD);
> outb_p(len, NVIDIA_SMB_BCNT);
> if (read_write == I2C_SMBUS_WRITE)
> for (i = 0; i < len; i++)
> outb_p(data->block[i + 1], NVIDIA_SMB_DATA+i);
> protocol |= NVIDIA_SMB_PRTCL_I2C_BLOCK_DATA;
> break;
>
> case I2C_SMBUS_PROC_CALL:
> printk(KERN_WARNING "i2c-nforce2.o: I2C_SMBUS_PROC_CALL not supported!\n");
> return -1;
> /*
> outb_p(command, NVIDIA_SMB_CMD);
> outb_p(data->word, NVIDIA_SMB_DATA);
> outb_p(data->word >> 8, NVIDIA_SMB_DATA + 1);
> protocol = NVIDIA_SMB_PRTCL_PROC_CALL | pec;
> read_write = I2C_SMBUS_READ;
> break;
> */
>
> case I2C_SMBUS_BLOCK_PROC_CALL:
> printk(KERN_WARNING "i2c-nforce2.o: I2C_SMBUS_BLOCK_PROC_CALL not supported!\n");
> return -1;
> /*
> protocol |= pec;
> len = min_t(u8, data->block[0], 31);
> outb_p(command, NVIDIA_SMB_CMD);
> outb_p(len, NVIDIA_SMB_BCNT);
> for (i = 0; i < len; i++)
> outb_p(data->block[i + 1], NVIDIA_SMB_DATA + i);
> protocol = NVIDIA_SMB_PRTCL_BLOCK_PROC_CALL | pec;
> read_write = I2C_SMBUS_READ;
> break;
> */
>
> case I2C_SMBUS_WORD_DATA_PEC:
> case I2C_SMBUS_BLOCK_DATA_PEC:
> case I2C_SMBUS_PROC_CALL_PEC:
> case I2C_SMBUS_BLOCK_PROC_CALL_PEC:
> printk(KERN_WARNING "i2c-nforce2.c: Unexpected software PEC transaction %d\n.", size);
> return -1;
>
> default:
> printk(KERN_WARNING "i2c-nforce2.c: Unsupported transaction %d\n", size);
> return -1;
> }
>
> outb_p((addr & 0x7f) << 1, NVIDIA_SMB_ADDR);
> outb_p(protocol, NVIDIA_SMB_PRTCL);
>
> temp = inb_p(NVIDIA_SMB_STS);
>
> #if 0
> do {
> nforce2_do_pause(1);
> temp = inb_p(NVIDIA_SMB_STS);
> } while (((temp & NVIDIA_SMB_STS_DONE) == 0) && (timeout++ < MAX_TIMEOUT));
> #endif
> if (~temp & NVIDIA_SMB_STS_DONE) {
> udelay(500);
> temp = inb_p(NVIDIA_SMB_STS);
> }
> if (~temp & NVIDIA_SMB_STS_DONE) {
> current->state = TASK_INTERRUPTIBLE;
> schedule_timeout(HZ/100);
> temp = inb_p(NVIDIA_SMB_STS);
> }
>
> if ((timeout >= MAX_TIMEOUT) || (~temp & NVIDIA_SMB_STS_DONE) || (temp & NVIDIA_SMB_STS_STATUS))
> return -1;
>
> 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:
> case I2C_SMBUS_PROC_CALL:
> data->word = inb_p(NVIDIA_SMB_DATA) | (inb_p(NVIDIA_SMB_DATA+1) << 8);
> break;
>
> case I2C_SMBUS_BLOCK_DATA:
> case I2C_SMBUS_BLOCK_PROC_CALL:
> len = inb_p(NVIDIA_SMB_BCNT);
> len = min_t(u8, len, 32);
> case I2C_SMBUS_I2C_BLOCK_DATA:
> for (i = 0; i < len; i++)
> data->block[i+1] = inb_p(NVIDIA_SMB_DATA + i);
> data->block[0] = len;
> break;
> }
>
> return 0;
> }
>
>
> 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_BLOCK_DATA */;
> }
>
>
> static struct pci_device_id nforce2_ids[] __devinitdata = {
> { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS,
> PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
> { 0 }
> };
>
>
> static int __devinit nforce2_probe_smb (struct pci_dev *dev, int reg, struct nforce2_smbus *smbus, char *name)
> {
> u16 iobase;
> int error;
>
> if (pci_read_config_word(dev, reg, &iobase) != PCIBIOS_SUCCESSFUL) {
> printk (KERN_ERR "i2c-nforce2.o: Error reading PCI config for %s\n", name);
> return -1;
> }
> smbus->dev = dev;
> smbus->base = iobase & 0xfffc;
> smbus->size = 8;
>
> if (!request_region(smbus->base, smbus->size, "nForce2 SMBus")) {
> printk (KERN_ERR "i2c-nforce2.o: Error requesting region %02x .. %02X for %s\n", smbus->base, smbus->base+smbus->size-1, name);
> return -1;
> }
>
> /* TODO: find a better way to find out whether this file is compiled
> * with i2c 2.7.0 of earlier
> */
> #ifdef I2C_HW_SMBUS_AMD8111
> smbus->adapter.owner = THIS_MODULE;
> #endif
> sprintf(smbus->adapter.name, "SMBus nForce2 adapter at %04x", smbus->base);
> smbus->adapter.id = I2C_ALGO_SMBUS | I2C_HW_SMBUS_NFORCE2;
> smbus->adapter.algo = &smbus_algorithm;
> smbus->adapter.algo_data = smbus;
>
> error = i2c_add_adapter(&smbus->adapter);
> if (error) {
> printk(KERN_WARNING "i2c-nforce2.o: Failed to register adapter.\n");
> release_region(smbus->base, smbus->size);
> return -1;
> }
> printk(KERN_INFO "i2c-nforce2.o: nForce2 SMBus adapter at %#x\n", smbus->base);
> return 0;
> }
>
>
> static int __devinit nforce2_probe(struct pci_dev *dev, const struct pci_device_id *id)
> {
> struct nforce2_smbus *smbuses;
> int res1, res2;
>
> /* we support 2 SMBus adapters */
> if (!(smbuses = (void *)kmalloc(2*sizeof(struct nforce2_smbus),
> GFP_KERNEL)))
> return -ENOMEM;
> memset (smbuses, 0, 2*sizeof(struct nforce2_smbus));
> pci_set_drvdata(dev, smbuses);
>
> /* SMBus adapter 1 */
> res1 = nforce2_probe_smb (dev, NFORCE_PCI_SMB1, &smbuses[0], "SMB1");
> if (res1 < 0) {
> printk (KERN_ERR "i2c-nforce2.o: Error probing SMB1.\n");
> smbuses[0].base = 0; /* to have a check value */
> }
> res2 = nforce2_probe_smb (dev, NFORCE_PCI_SMB2, &smbuses[1], "SMB2");
> if (res2 < 0) {
> printk (KERN_ERR "i2c-nforce2.o: 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 */
> kfree(smbuses);
> return -ENODEV;
> }
>
> return 0;
> }
>
>
> static void __devexit nforce2_remove(struct pci_dev *dev)
> {
> int res;
> struct nforce2_smbus *smbuses = (void*) pci_get_drvdata(dev);
>
> 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 = __devexit_p(nforce2_remove),
> };
>
> int __init nforce2_init(void)
> {
> printk(KERN_INFO "i2c-nforce2.o version %s (%s)\n", LM_VERSION, LM_DATE);
> return pci_module_init(&nforce2_driver);
> }
>
> void __exit nforce2_exit(void)
> {
> pci_unregister_driver(&nforce2_driver);
> }
>
> module_init(nforce2_init);
> module_exit(nforce2_exit);
>
