From a55703e80bf100f4bc41fbdc8cdcdd6dc5d4b429 Mon Sep 17 00:00:00 2001 From: Philip Edelbrock Date: Sun, 25 Jul 1999 19:10:36 +0000 Subject: [PATCH] (Phil) Renamed i2c-via2.c to i2c-viapro.c. git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@519 7894878c-1315-0410-8ee3-d5d059ff63e0 --- kernel/busses/i2c-via2.c | 552 --------------------------------------- 1 file changed, 552 deletions(-) delete mode 100644 kernel/busses/i2c-via2.c diff --git a/kernel/busses/i2c-via2.c b/kernel/busses/i2c-via2.c deleted file mode 100644 index 4499db51..00000000 --- a/kernel/busses/i2c-via2.c +++ /dev/null @@ -1,552 +0,0 @@ -/* - i2c-via2.c - Part of lm_sensors, Linux kernel modules for hardware - monitoring - Copyright (c) 1998, 1999 Frodo Looijaard , - Philip Edelbrock , Kyösti Mälkki - - 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. -*/ - -/* Note: we assume there can only be one VT596A/B, with one SMBus interface */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include "version.h" -#include "compat.h" - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,1,54)) -#include -#endif - -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,53) -#include -#else -#define __init -#define __initdata -#endif - - -#ifndef PCI_DEVICE_ID_VIA_82C596_3 -#define PCI_DEVICE_ID_VIA_82C596_3 0x3050 -#endif -#ifndef PCI_DEVICE_ID_VIA_82C686_4 -#define PCI_DEVICE_ID_VIA_82C686_4 0x3057 -#endif - -/* SMBus address offsets */ -#define SMBHSTSTS (0 + vt596_smba) -#define SMBHSLVSTS (1 + vt596_smba) -#define SMBHSTCNT (2 + vt596_smba) -#define SMBHSTCMD (3 + vt596_smba) -#define SMBHSTADD (4 + vt596_smba) -#define SMBHSTDAT0 (5 + vt596_smba) -#define SMBHSTDAT1 (6 + vt596_smba) -#define SMBBLKDAT (7 + vt596_smba) -#define SMBSLVCNT (8 + vt596_smba) -#define SMBSHDWCMD (9 + vt596_smba) -#define SMBSLVEVT (0xA + vt596_smba) -#define SMBSLVDAT (0xC + vt596_smba) - -/* PCI Address Constants */ - -/* SMBus data in configuration space can be found in two places, - We try to select the better one*/ - -static unsigned short smb_cf_base; -static unsigned short smb_cf_hstcfg; - -#define SMBBA1 0x90 -#define SMBBA2 0x80 -#define SMBBA (smb_cf_base) -#define SMBHSTCFG (smb_cf_hstcfg) -#define SMBSLVC (SMBHSTCFG+1) -#define SMBSHDW1 (SMBHSTCFG+2) -#define SMBSHDW2 (SMBHSTCFG+3) -#define SMBREV (SMBHSTCFG+4) - -/* Other settings */ -#define MAX_TIMEOUT 500 -#define ENABLE_INT9 0 - -/* VT82C596 constants */ -#define VT596_QUICK 0x00 -#define VT596_BYTE 0x04 -#define VT596_BYTE_DATA 0x08 -#define VT596_WORD_DATA 0x0C -#define VT596_BLOCK_DATA 0x14 - -/* insmod parameters */ - -/* If force is set to anything different from 0, we forcibly enable the - VT596. DANGEROUS! */ -static int force = 0; -MODULE_PARM(force,"i"); -MODULE_PARM_DESC(force,"Forcibly enable the VT82C596 SMBus. DANGEROUS!"); - -/* If force_addr is set to anything different from 0, we forcibly enable - the VT596 at the given address. VERY DANGEROUS! */ -static int force_addr = 0; -MODULE_PARM(force_addr,"i"); -MODULE_PARM_DESC(force_addr,"Forcibly enable the VT82C596 SMBus at the given address. " - "EXTREMELY DANGEROUS!"); - -#ifdef MODULE -static -#else -extern -#endif - int __init i2c_vt596_init(void); -static int __init vt596_cleanup(void); -static int vt596_setup(void); -static s32 vt596_access(struct i2c_adapter *adap, u8 addr, char read_write, - u8 command, int size, union i2c_smbus_data * data); -static void vt596_do_pause( unsigned int amount ); -static int vt596_transaction(void); -static void vt596_inc(struct i2c_adapter *adapter); -static void vt596_dec(struct i2c_adapter *adapter); - -#ifdef MODULE -extern int init_module(void); -extern int cleanup_module(void); -#endif /* MODULE */ - -static struct i2c_algorithm smbus_algorithm = { - /* name */ "Non-I2C SMBus adapter", - /* id */ I2C_ALGO_SMBUS, - /* master_xfer */ NULL, - /* smbus_access */ vt596_access, - /* slave_send */ NULL, - /* slave_rcv */ NULL, - /* algo_control */ NULL, -}; - -static struct i2c_adapter vt596_adapter = { - "unset", - I2C_ALGO_SMBUS | I2C_HW_SMBUS_VIA2, - &smbus_algorithm, - NULL, - vt596_inc, - vt596_dec, - NULL, - NULL, -}; - -static int __initdata vt596_initialized; -static unsigned short vt596_smba = 0; - - -/* Detect whether a VT596 can be found, and initialize it, where necessary. - Note the differences between kernels with the old PCI BIOS interface and - newer kernels with the real PCI interface. In compat.h some things are - defined to make the transition easier. */ -int vt596_setup(void) -{ - int error_return=0; - unsigned char temp; - -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,54)) - struct pci_dev *VT596_dev; -#else - unsigned char VT596_bus, VT596_devfn; - int i,res; -#endif - - /* First check whether we can access PCI at all */ - if (pci_present() == 0) { - printk("i2c-via2.o: Error: No PCI-bus found!\n"); - error_return=-ENODEV; - goto END; - } - - /* Look for the VT596 function 3 _or_ VT686 function 4 */ -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,54)) - VT596_dev = NULL; - VT596_dev = pci_find_device(PCI_VENDOR_ID_VIA, - PCI_DEVICE_ID_VIA_82C596_3, VT596_dev); - if (VT596_dev == NULL) - VT596_dev = pci_find_device(PCI_VENDOR_ID_VIA, - PCI_DEVICE_ID_VIA_82C686_4, VT596_dev); - - if (VT596_dev == NULL) { -#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,1,54) */ - for (i = 0; - ! (res = pcibios_find_device(PCI_VENDOR_ID_VIA, - PCI_DEVICE_ID_VIA_82C596_3, - i,&VT596_bus, &VT596_devfn)) && - PCI_FUNC(VT596_devfn) != 3; - i++); - - if (res) - for (i = 0; - ! (res = pcibios_find_device(PCI_VENDOR_ID_VIA, - PCI_DEVICE_ID_VIA_82C686_4, - i,&VT596_bus, &VT596_devfn)) && - PCI_FUNC(VT596_devfn) != 4; - i++); - - if (res) { -#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,54) */ - printk("i2c-via2.o: Error: Can't detect vt82c596 or vt82c686"); - error_return=-ENODEV; - goto END; - } - -/* Determine the configuration space registers for the SMBus areas */ - if ((! pci_read_config_word_united(VT596_dev, VT596_bus ,VT596_devfn, - SMBBA1, &vt596_smba)) && (vt596_smba & 0x1)) { - smb_cf_base = SMBBA1; - smb_cf_hstcfg = 0xD2; - } else if ((! pci_read_config_word_united(VT596_dev, VT596_bus ,VT596_devfn, - SMBBA2, &vt596_smba)) && (vt596_smba & 0x1)) { - smb_cf_base = SMBBA2; - smb_cf_hstcfg = 0x84; - } else { - printk("i2c-via2.o: Cannot configure SMBus I/O Base address\n"); - error_return=-ENODEV; - goto END; - } - -/* Determine the address of the SMBus areas */ - if (force_addr) { - vt596_smba = force_addr & 0xfff0; - force = 0; - } else { - vt596_smba &= 0xfff0; - } - - if (check_region(vt596_smba, 8)) { - printk("i2c-via2.o: vt82c596_smb region 0x%x already in use!\n", vt596_smba); - error_return=-ENODEV; - goto END; - } - - pci_read_config_byte_united(VT596_dev, VT596_bus, VT596_devfn, - SMBHSTCFG, &temp); -/* If force_addr is set, we program the new address here. Just to make - sure, we disable the VT596 first. */ - if (force_addr) { - pci_write_config_byte_united(VT596_dev, VT596_bus, VT596_devfn, - SMBHSTCFG, temp & 0xfe); - pci_write_config_word_united(VT596_dev, VT596_bus ,VT596_devfn, - SMBBA,vt596_smba); - pci_write_config_byte_united(VT596_dev, VT596_bus, VT596_devfn, - SMBHSTCFG, temp | 0x01); - printk("i2c-via2.o: WARNING: VT596 SMBus interface set to new " - "address %04x!\n",vt596_smba); - } else if ((temp & 1) == 0) { - if (force) { -/* NOTE: This assumes I/O space and other allocations WERE - done by the Bios! Don't complain if your hardware does weird - things after enabling this. :') Check for Bios updates before - resorting to this. */ - pci_write_config_byte_united(VT596_dev, VT596_bus, VT596_devfn, - SMBHSTCFG, temp | 1); - printk("i2c-via2.o: WARNING: SMBus interface has been FORCEFULLY " - "ENABLED!\n"); - } else { - printk("SMBUS: Error: Host SMBus controller not enabled!\n"); - error_return=-ENODEV; - goto END; - } - } - - /* Everything is happy, let's grab the memory and set things up. */ - request_region(vt596_smba, 8, "via2-smbus"); - -#ifdef DEBUG - if ((temp & 0x0E) == 8) - printk("i2c-via2.o: using Interrupt 9 for SMBus.\n"); - else if ((temp & 0x0E) == 0) - printk("i2c-via2.o: using Interrupt SMI# for SMBus.\n"); - else - printk("i2c-via2.o: Illegal Interrupt configuration (or code out " - "of date)!\n"); - - pci_read_config_byte_united(VT596_dev, VT596_bus, VT596_devfn, SMBREV, - &temp); - printk("i2c-via2.o: SMBREV = 0x%X\n",temp); - printk("i2c-via2.o: VT596_smba = 0x%X\n",vt596_smba); -#endif /* DEBUG */ - -END: - return error_return; -} - - -/* Internally used pause function */ -void vt596_do_pause( unsigned int amount ) -{ - current->state = TASK_INTERRUPTIBLE; - schedule_timeout(amount); -} - -/* Another internally used function */ -int vt596_transaction(void) -{ - int temp; - int result=0; - int timeout=0; - -#ifdef DEBUG - printk("i2c-via2.o: Transaction (pre): CNT=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, " - "DAT1=%02x\n", - inb_p(SMBHSTCNT),inb_p(SMBHSTCMD),inb_p(SMBHSTADD),inb_p(SMBHSTDAT0), - inb_p(SMBHSTDAT1)); -#endif - - /* Make sure the SMBus host is ready to start transmitting */ - if ((temp = inb_p(SMBHSTSTS)) != 0x00) { -#ifdef DEBUG - printk("i2c-via2.o: SMBus busy (%02x). Resetting... \n",temp); -#endif - outb_p(temp, SMBHSTSTS); - if ((temp = inb_p(SMBHSTSTS)) != 0x00) { -#ifdef DEBUG - printk("i2c-via2.o: Failed! (%02x)\n",temp); -#endif - return -1; - } else { -#ifdef DEBUG - printk("i2c-via2.o: Successfull!\n"); -#endif - } - } - - /* start the transaction by setting bit 6 */ - outb_p(inb(SMBHSTCNT) | 0x040, SMBHSTCNT); - - /* We will always wait for a fraction of a second! - I don't know if VIA needs this, Intel did */ - do { - vt596_do_pause(1); - temp=inb_p(SMBHSTSTS); - } while ((temp & 0x01) && (timeout++ < MAX_TIMEOUT)); - - /* If the SMBus is still busy, we give up */ - if (timeout >= MAX_TIMEOUT) { -#ifdef DEBUG - printk("i2c-via2.o: SMBus Timeout!\n"); - result = -1; -#endif - } - - if (temp & 0x10) { - result = -1; -#ifdef DEBUG - printk("i2c-via2.o: Error: Failed bus transaction\n"); -#endif - } - - if (temp & 0x08) { - result = -1; - printk("i2c-via2.o: Bus collision! SMBus may be locked until next hard - reset. (sorry!)\n"); - /* Clock stops and slave is stuck in mid-transmission */ - } - - if (temp & 0x04) { - result = -1; -#ifdef DEBUG - printk("i2c-via2.o: Error: no response!\n"); -#endif - } - - if (inb_p(SMBHSTSTS) != 0x00) - outb_p( inb(SMBHSTSTS), SMBHSTSTS); - - if ((temp = inb_p(SMBHSTSTS)) != 0x00) { -#ifdef DEBUG - printk("i2c-via2.o: Failed reset at end of transaction (%02x)\n",temp); -#endif - } -#ifdef DEBUG - printk("i2c-via2.o: Transaction (post): CNT=%02x, CMD=%02x, ADD=%02x, " - "DAT0=%02x, DAT1=%02x\n", - inb_p(SMBHSTCNT),inb_p(SMBHSTCMD),inb_p(SMBHSTADD),inb_p(SMBHSTDAT0), - inb_p(SMBHSTDAT1)); -#endif - return result; -} - -/* Return -1 on error. See smbus.h for more information */ -s32 vt596_access(struct i2c_adapter *adap, u8 addr, char read_write, - u8 command, int size, union i2c_smbus_data * data) -{ - int i,len; - - switch(size) { - case I2C_SMBUS_PROC_CALL: - printk("i2c-via2.o: I2C_SMBUS_PROC_CALL not supported!\n"); - return -1; - case I2C_SMBUS_QUICK: - outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), SMBHSTADD); - size = VT596_QUICK; - 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 = VT596_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 = VT596_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 = VT596_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 = VT596_BLOCK_DATA; - break; - } - - outb_p((size & 0x1C) + (ENABLE_INT9 & 1), SMBHSTCNT); - - if (vt596_transaction()) /* Error in transaction */ - return -1; - - if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK)) - return 0; - - - switch(size) { - case VT596_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 VT596_BYTE_DATA: - data->byte = inb_p(SMBHSTDAT0); - break; - case VT596_WORD_DATA: - data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); - break; - case VT596_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 vt596_inc(struct i2c_adapter *adapter) -{ - MOD_INC_USE_COUNT; -} - -void vt596_dec(struct i2c_adapter *adapter) -{ - - MOD_DEC_USE_COUNT; -} - -int __init i2c_vt596_init(void) -{ - int res; - printk("via2.o version %s (%s)\n",LM_VERSION,LM_DATE); -#ifdef DEBUG -/* PE- It might be good to make this a permanent part of the code! */ - if (vt596_initialized) { - printk("i2c-via2.o: Oops, vt596_init called a second time!\n"); - return -EBUSY; - } -#endif - vt596_initialized = 0; - if ((res = vt596_setup())) { - printk("i2c-via2.o: vt82c596 not detected, module not inserted.\n"); - vt596_cleanup(); - return res; - } - vt596_initialized ++; - sprintf(vt596_adapter.name,"SMBus vt82c596 adapter at %04x",vt596_smba); - if ((res = i2c_add_adapter(&vt596_adapter))) { - printk("i2c-via2.o: Adapter registration failed, module not inserted.\n"); - vt596_cleanup(); - return res; - } - vt596_initialized++; - printk("i2c-via2.o: vt82c596 bus detected and initialized\n"); - return 0; -} - -int __init vt596_cleanup(void) -{ - int res; - if (vt596_initialized >= 2) - { - if ((res = i2c_del_adapter(&vt596_adapter))) { - printk("i2c-via2.o: i2c_del_adapter failed, module not removed\n"); - return res; - } else - vt596_initialized--; - } - if (vt596_initialized >= 1) { - release_region(vt596_smba, 8); - vt596_initialized--; - } - return 0; -} - -EXPORT_NO_SYMBOLS; - -#ifdef MODULE - -MODULE_AUTHOR("Frodo Looijaard and Philip Edelbrock "); -MODULE_DESCRIPTION("vt82c596 SMBus driver"); - - -int init_module(void) -{ - return i2c_vt596_init(); -} - -int cleanup_module(void) -{ - return vt596_cleanup(); -} - -#endif /* MODULE */ -