mirror of
https://github.com/lm-sensors/lm-sensors.git
synced 2026-10-30 13:00:30 +00:00
removed; now supported by i2c-piix4.
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@965 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Mark D. Studebaker committed
1 parent
3047bd8374
commit
7c21d246e8
1 file changed
-521
@@ -1,521 +0,0 @@
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/*
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i2c-osb4.c - Part of lm_sensors, Linux kernel modules for hardware monitoring
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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This driver was partly written by Steffen Persvold (sp@scali.com)
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for ServerWorks OSB4 southbridge.
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*/
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/* Note: we assume there can only be one OSB4, with one SMBus interface */
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#include <linux/version.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <asm/io.h>
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#include <linux/kernel.h>
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#include <linux/stddef.h>
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#include <linux/sched.h>
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#include <linux/ioport.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include "version.h"
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#ifndef PCI_DEVICE_ID_SERVERWORKS_OSB4
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#define PCI_DEVICE_ID_SERVERWORKS_OSB4 0x0200
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#endif
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#ifndef PCI_VENDOR_ID_SERVERWORKS
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#define PCI_VENDOR_ID_SERVERWORKS 0x01166
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#endif
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/* OSB4 SMBus address offsets */
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#define SMBHSTSTS (0 + osb4_smba)
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#define SMBHSLVSTS (1 + osb4_smba)
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#define SMBHSTCNT (2 + osb4_smba)
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#define SMBHSTCMD (3 + osb4_smba)
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#define SMBHSTADD (4 + osb4_smba)
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#define SMBHSTDAT0 (5 + osb4_smba)
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#define SMBHSTDAT1 (6 + osb4_smba)
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#define SMBBLKDAT (7 + osb4_smba)
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#define SMBSLVCNT (8 + osb4_smba)
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#define SMBSHDWCMD (9 + osb4_smba)
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#define SMBSLVEVT (0xA + osb4_smba)
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#define SMBSLVDAT (0xC + osb4_smba)
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/* PCI Address Constants */
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#define SMBBA 0x090
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#define SMBHSTCFG 0x0D2
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#define SMBSLVC 0x0D3
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#define SMBSHDW1 0x0D4
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#define SMBSHDW2 0x0D5
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#define SMBREV 0x0D6
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/* Other settings */
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#define MAX_TIMEOUT 500
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#define ENABLE_INT9 0
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/* OSB4 constants */
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#define OSB4_QUICK 0x00
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#define OSB4_BYTE 0x04
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#define OSB4_BYTE_DATA 0x08
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#define OSB4_WORD_DATA 0x0C
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#define OSB4_BLOCK_DATA 0x14
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/* insmod parameters */
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/* If force is set to anything different from 0, we forcibly enable the
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OSB4. DANGEROUS! */
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static int force = 0;
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MODULE_PARM(force, "i");
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MODULE_PARM_DESC(force, "Forcibly enable the OSB4. DANGEROUS!");
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/* If force_addr is set to anything different from 0, we forcibly enable
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the OSB4 at the given address. VERY DANGEROUS! */
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static int force_addr = 0;
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MODULE_PARM(force_addr, "i");
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MODULE_PARM_DESC(force_addr,
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"Forcibly enable the OSB4 at the given address. "
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"EXTREMELY DANGEROUS!");
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#ifdef MODULE
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static
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#else
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extern
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#endif
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int __init i2c_osb4_init(void);
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static int __init osb4_cleanup(void);
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static int osb4_setup(void);
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static s32 osb4_access(struct i2c_adapter *adap, u16 addr,
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unsigned short flags, char read_write,
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u8 command, int size, union i2c_smbus_data *data);
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static void osb4_do_pause(unsigned int amount);
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static int osb4_transaction(void);
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static void osb4_inc(struct i2c_adapter *adapter);
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static void osb4_dec(struct i2c_adapter *adapter);
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static u32 osb4_func(struct i2c_adapter *adapter);
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#ifdef MODULE
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extern int init_module(void);
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extern int cleanup_module(void);
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#endif /* MODULE */
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static struct i2c_algorithm smbus_algorithm = {
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/* name */ "Non-I2C SMBus adapter",
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/* id */ I2C_ALGO_SMBUS,
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/* master_xfer */ NULL,
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/* smbus_access */ osb4_access,
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/* slave_send */ NULL,
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/* slave_rcv */ NULL,
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/* algo_control */ NULL,
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/* functionality */ osb4_func,
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};
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static struct i2c_adapter osb4_adapter = {
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"unset",
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I2C_ALGO_SMBUS | I2C_HW_SMBUS_OSB4,
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&smbus_algorithm,
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NULL,
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osb4_inc,
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osb4_dec,
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NULL,
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NULL,
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};
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static int __initdata osb4_initialized;
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static unsigned short osb4_smba = 0;
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/* Detect whether a OSB4 can be found, and initialize it, where necessary.
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Note the differences between kernels with the old PCI BIOS interface and
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newer kernels with the real PCI interface. In compat.h some things are
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defined to make the transition easier. */
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int osb4_setup(void)
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{
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int error_return = 0;
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unsigned char temp;
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struct pci_dev *OSB4_dev;
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/* First check whether we can access PCI at all */
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if (pci_present() == 0) {
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printk("i2c-osb4.o: Error: No PCI-bus found!\n");
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error_return = -ENODEV;
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goto END;
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}
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/* Look for the OSB4, function 0 */
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/* Note: we keep on searching until we have found 'function 0' */
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OSB4_dev = NULL;
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do
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OSB4_dev = pci_find_device(PCI_VENDOR_ID_SERVERWORKS,
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PCI_DEVICE_ID_SERVERWORKS_OSB4,
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OSB4_dev);
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while (OSB4_dev && (PCI_FUNC(OSB4_dev->devfn) != 0));
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if (OSB4_dev == NULL) {
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printk
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("i2c-osb4.o: Error: Can't detect OSB4, function 0!\n");
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error_return = -ENODEV;
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goto END;
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}
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/* Determine the address of the SMBus areas */
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if (force_addr) {
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osb4_smba = force_addr & 0xfff0;
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force = 0;
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} else {
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pci_read_config_word(OSB4_dev, SMBBA, &osb4_smba);
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osb4_smba &= 0xfff0;
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}
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if (check_region(osb4_smba, 8)) {
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printk
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("i2c-osb4.o: OSB4_smb region 0x%x already in use!\n",
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osb4_smba);
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error_return = -ENODEV;
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goto END;
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}
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pci_read_config_byte(OSB4_dev, SMBHSTCFG, &temp);
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/* If force_addr is set, we program the new address here. Just to make
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sure, we disable the OSB4 first. */
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if (force_addr) {
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pci_write_config_byte(OSB4_dev, SMBHSTCFG, temp & 0xfe);
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pci_write_config_word(OSB4_dev, SMBBA, osb4_smba);
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pci_write_config_byte(OSB4_dev, SMBHSTCFG, temp | 0x01);
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printk
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("i2c-osb4.o: WARNING: OSB4 SMBus interface set to new "
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"address %04x!\n", osb4_smba);
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} else if ((temp & 1) == 0) {
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if (force) {
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/* NOTE: This assumes I/O space and other allocations WERE
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done by the Bios! Don't complain if your hardware does weird
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things after enabling this. :') Check for Bios updates before
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resorting to this. */
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pci_write_config_byte(OSB4_dev, SMBHSTCFG,
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temp | 1);
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printk
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("i2c-osb4.o: WARNING: OSB4 SMBus interface has been FORCEFULLY "
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"ENABLED!\n");
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} else {
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printk
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("SMBUS: Error: Host SMBus controller not enabled!\n");
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error_return = -ENODEV;
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goto END;
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}
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}
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/* Everything is happy, let's grab the memory and set things up. */
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request_region(osb4_smba, 8, "osb4-smbus");
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#ifdef DEBUG
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if ((temp & 0x0E) == 8)
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printk
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("i2c-osb4.o: OSB4 using Interrupt 9 for SMBus.\n");
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else if ((temp & 0x0E) == 0)
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printk
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("i2c-osb4.o: OSB4 using Interrupt SMI# for SMBus.\n");
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else
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printk
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("i2c-osb4.o: OSB4: Illegal Interrupt configuration (or code out "
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"of date)!\n");
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pci_read_config_byte(OSB4_dev, SMBREV, &temp);
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printk("i2c-osb4.o: SMBREV = 0x%X\n", temp);
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printk("i2c-osb4.o: OSB4_smba = 0x%X\n", osb4_smba);
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#endif /* DEBUG */
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END:
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return error_return;
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}
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/* Internally used pause function */
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void osb4_do_pause(unsigned int amount)
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{
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current->state = TASK_INTERRUPTIBLE;
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schedule_timeout(amount);
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}
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/* Another internally used function */
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int osb4_transaction(void)
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{
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int temp;
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int result = 0;
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int timeout = 0;
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#ifdef DEBUG
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printk
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("i2c-osb4.o: Transaction (pre): CNT=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, "
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"DAT1=%02x\n", inb_p(SMBHSTCNT), inb_p(SMBHSTCMD),
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inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1));
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#endif
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/* Make sure the SMBus host is ready to start transmitting */
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if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
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#ifdef DEBUG
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printk("i2c-osb4.o: SMBus busy (%02x). Resetting... \n",
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temp);
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#endif
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outb_p(temp, SMBHSTSTS);
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if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
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#ifdef DEBUG
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printk("i2c-osb4.o: Failed! (%02x)\n", temp);
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#endif
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return -1;
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} else {
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#ifdef DEBUG
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printk("i2c-osb4.o: Successfull!\n");
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#endif
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}
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}
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/* start the transaction by setting bit 6 */
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outb_p(inb(SMBHSTCNT) | 0x040, SMBHSTCNT);
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/* We will always wait for a fraction of a second! (See OSB4 docs errata) */
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do {
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osb4_do_pause(1);
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temp = inb_p(SMBHSTSTS);
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} while ((temp & 0x01) && (timeout++ < MAX_TIMEOUT));
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/* If the SMBus is still busy, we give up */
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if (timeout >= MAX_TIMEOUT) {
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#ifdef DEBUG
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printk("i2c-osb4.o: SMBus Timeout!\n");
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result = -1;
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#endif
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}
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if (temp & 0x10) {
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result = -1;
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#ifdef DEBUG
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printk("i2c-osb4.o: Error: Failed bus transaction\n");
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#endif
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}
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if (temp & 0x08) {
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result = -1;
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printk
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("i2c-osb4.o: Bus collision! SMBus may be locked until next hard\n"
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"reset. (sorry!)\n");
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/* Clock stops and slave is stuck in mid-transmission */
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}
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|
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if (temp & 0x04) {
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result = -1;
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#ifdef DEBUG
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printk("i2c-osb4.o: Error: no response!\n");
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#endif
|
||||
}
|
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|
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if (inb_p(SMBHSTSTS) != 0x00)
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outb_p(inb(SMBHSTSTS), SMBHSTSTS);
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|
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if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
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#ifdef DEBUG
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printk
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("i2c-osb4.o: Failed reset at end of transaction (%02x)\n",
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temp);
|
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#endif
|
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}
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#ifdef DEBUG
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printk
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("i2c-osb4.o: Transaction (post): CNT=%02x, CMD=%02x, ADD=%02x, "
|
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"DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT), inb_p(SMBHSTCMD),
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inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1));
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#endif
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return result;
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}
|
||||
|
||||
/* Return -1 on error. See smbus.h for more information */
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s32 osb4_access(struct i2c_adapter * adap, u16 addr,
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unsigned short flags, char read_write,
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u8 command, int size, union i2c_smbus_data * data)
|
||||
{
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int i, len;
|
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|
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switch (size) {
|
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case I2C_SMBUS_PROC_CALL:
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printk
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("i2c-osb4.o: I2C_SMBUS_PROC_CALL not supported!\n");
|
||||
return -1;
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||||
case I2C_SMBUS_QUICK:
|
||||
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
|
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SMBHSTADD);
|
||||
size = OSB4_QUICK;
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||||
break;
|
||||
case I2C_SMBUS_BYTE:
|
||||
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
|
||||
SMBHSTADD);
|
||||
if (read_write == I2C_SMBUS_WRITE)
|
||||
outb_p(command, SMBHSTCMD);
|
||||
size = OSB4_BYTE;
|
||||
break;
|
||||
case I2C_SMBUS_BYTE_DATA:
|
||||
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
|
||||
SMBHSTADD);
|
||||
outb_p(command, SMBHSTCMD);
|
||||
if (read_write == I2C_SMBUS_WRITE)
|
||||
outb_p(data->byte, SMBHSTDAT0);
|
||||
size = OSB4_BYTE_DATA;
|
||||
break;
|
||||
case I2C_SMBUS_WORD_DATA:
|
||||
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
|
||||
SMBHSTADD);
|
||||
outb_p(command, SMBHSTCMD);
|
||||
if (read_write == I2C_SMBUS_WRITE) {
|
||||
outb_p(data->word & 0xff, SMBHSTDAT0);
|
||||
outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1);
|
||||
}
|
||||
size = OSB4_WORD_DATA;
|
||||
break;
|
||||
case I2C_SMBUS_BLOCK_DATA:
|
||||
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
|
||||
SMBHSTADD);
|
||||
outb_p(command, SMBHSTCMD);
|
||||
if (read_write == I2C_SMBUS_WRITE) {
|
||||
len = data->block[0];
|
||||
if (len < 0)
|
||||
len = 0;
|
||||
if (len > 32)
|
||||
len = 32;
|
||||
outb_p(len, SMBHSTDAT0);
|
||||
i = inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */
|
||||
for (i = 1; i <= len; i++)
|
||||
outb_p(data->block[i], SMBBLKDAT);
|
||||
}
|
||||
size = OSB4_BLOCK_DATA;
|
||||
break;
|
||||
}
|
||||
|
||||
outb_p((size & 0x1C) + (ENABLE_INT9 & 1), SMBHSTCNT);
|
||||
|
||||
if (osb4_transaction()) /* Error in transaction */
|
||||
return -1;
|
||||
|
||||
if ((read_write == I2C_SMBUS_WRITE) || (size == OSB4_QUICK))
|
||||
return 0;
|
||||
|
||||
|
||||
switch (size) {
|
||||
case OSB4_BYTE: /* Where is the result put? I assume here it is in
|
||||
SMBHSTDAT0 but it might just as well be in the
|
||||
SMBHSTCMD. No clue in the docs */
|
||||
|
||||
data->byte = inb_p(SMBHSTDAT0);
|
||||
break;
|
||||
case OSB4_BYTE_DATA:
|
||||
data->byte = inb_p(SMBHSTDAT0);
|
||||
break;
|
||||
case OSB4_WORD_DATA:
|
||||
data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);
|
||||
break;
|
||||
case OSB4_BLOCK_DATA:
|
||||
data->block[0] = inb_p(SMBHSTDAT0);
|
||||
i = inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */
|
||||
for (i = 1; i <= data->block[0]; i++)
|
||||
data->block[i] = inb_p(SMBBLKDAT);
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void osb4_inc(struct i2c_adapter *adapter)
|
||||
{
|
||||
MOD_INC_USE_COUNT;
|
||||
}
|
||||
|
||||
void osb4_dec(struct i2c_adapter *adapter)
|
||||
{
|
||||
|
||||
MOD_DEC_USE_COUNT;
|
||||
}
|
||||
|
||||
u32 osb4_func(struct i2c_adapter *adapter)
|
||||
{
|
||||
return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
|
||||
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
|
||||
I2C_FUNC_SMBUS_BLOCK_DATA;
|
||||
}
|
||||
|
||||
int __init i2c_osb4_init(void)
|
||||
{
|
||||
int res;
|
||||
printk("i2c-osb4.o version %s (%s)\n", LM_VERSION, LM_DATE);
|
||||
if (osb4_initialized) {
|
||||
printk
|
||||
("i2c-osb4.o: Oops, osb4_init called a second time!\n");
|
||||
return -EBUSY;
|
||||
}
|
||||
osb4_initialized = 0;
|
||||
if ((res = osb4_setup())) {
|
||||
printk
|
||||
("i2c-osb4.o: OSB4 not detected, module not inserted.\n");
|
||||
osb4_cleanup();
|
||||
return res;
|
||||
}
|
||||
osb4_initialized++;
|
||||
sprintf(osb4_adapter.name, "SMBus OSB4 adapter at %04x",
|
||||
osb4_smba);
|
||||
if ((res = i2c_add_adapter(&osb4_adapter))) {
|
||||
printk
|
||||
("i2c-osb4.o: Adapter registration failed, module not inserted.\n");
|
||||
osb4_cleanup();
|
||||
return res;
|
||||
}
|
||||
osb4_initialized++;
|
||||
printk("i2c-osb4.o: OSB4 bus detected and initialized\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
int __init osb4_cleanup(void)
|
||||
{
|
||||
int res;
|
||||
if (osb4_initialized >= 2) {
|
||||
if ((res = i2c_del_adapter(&osb4_adapter))) {
|
||||
printk
|
||||
("i2c-osb4.o: i2c_del_adapter failed, module not removed\n");
|
||||
return res;
|
||||
} else
|
||||
osb4_initialized--;
|
||||
}
|
||||
if (osb4_initialized >= 1) {
|
||||
release_region(osb4_smba, 8);
|
||||
osb4_initialized--;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
EXPORT_NO_SYMBOLS;
|
||||
|
||||
#ifdef MODULE
|
||||
|
||||
MODULE_AUTHOR("Steffen Persvold <sp@scali.no>, Philip Edelbrock <phil@netroedge.com>, and Frodo Looijaard <frodol@dds.nl>");
|
||||
MODULE_DESCRIPTION("ServerWorks OSB4 SMBus driver");
|
||||
|
||||
int init_module(void)
|
||||
{
|
||||
return i2c_osb4_init();
|
||||
}
|
||||
|
||||
int cleanup_module(void)
|
||||
{
|
||||
return osb4_cleanup();
|
||||
}
|
||||
|
||||
#endif /* MODULE */
|
||||
Reference in new issue
Block a user