--- /dev/null 1994-07-17 19:46:18.000000000 -0400 +++ linux/drivers/i2c/busses/i2c-ali1535.c 2002-05-20 01:51:45.000000000 -0400 @@ -0,0 +1,687 @@ +/* + i2c-ali1535.c - Part of lm_sensors, Linux kernel modules for hardware + monitoring + Copyright (c) 2000 Frodo Looijaard , + Philip Edelbrock , + Mark D. Studebaker , + Dan Eaton and + Stephen Rousset + + 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. +*/ + +/* + This is the driver for the SMB Host controller on + Acer Labs Inc. (ALI) M1535 South Bridge. + + The M1535 is a South bridge for portable systems. + It is very similar to the M15x3 South bridges also produced + by Acer Labs Inc. Some of the registers within the part + have moved and some have been redefined slightly. Additionally, + the sequencing of the SMBus transactions has been modified + to be more consistent with the sequencing recommended by + the manufacturer and observed through testing. These + changes are reflected in this driver and can be identified + by comparing this driver to the i2c-ali15x3 driver. + For an overview of these chips see http://www.acerlabs.com + + The SMB controller is part of the 7101 device, which is an + ACPI-compliant Power Management Unit (PMU). + + The whole 7101 device has to be enabled for the SMB to work. + You can't just enable the SMB alone. + The SMB and the ACPI have separate I/O spaces. + We make sure that the SMB is enabled. We leave the ACPI alone. + + This driver controls the SMB Host only. + + This driver does not use interrupts. +*/ + + +/* Note: we assume there can only be one ALI1535, with one SMBus interface */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_LICENSE("GPL"); + +#ifndef DECLARE_MUTEX +#define DECLARE_MUTEX(name) struct semaphore name = MUTEX +#endif /* def DECLARE_MUTEX */ + +/* ALI1535 SMBus address offsets */ +#define SMBHSTSTS (0 + ali1535_smba) +#define SMBHSTTYP (1 + ali1535_smba) +#define SMBHSTPORT (2 + ali1535_smba) +#define SMBHSTCMD (7 + ali1535_smba) +#define SMBHSTADD (3 + ali1535_smba) +#define SMBHSTDAT0 (4 + ali1535_smba) +#define SMBHSTDAT1 (5 + ali1535_smba) +#define SMBBLKDAT (6 + ali1535_smba) + +/* PCI Address Constants */ +#define SMBCOM 0x004 +#define SMBREV 0x008 +#define SMBCFG 0x0D1 +#define SMBBA 0x0E2 +#define SMBHSTCFG 0x0F0 +#define SMBCLK 0x0F2 + +/* Other settings */ +#define MAX_TIMEOUT 500 /* times 1/100 sec */ +#define ALI1535_SMB_IOSIZE 32 + +/* +*/ +#define ALI1535_SMB_DEFAULTBASE 0x8040 + +/* ALI1535 address lock bits */ +#define ALI1535_LOCK 0x06 < dwe > + +/* ALI1535 command constants */ +#define ALI1535_QUICK 0x00 +#define ALI1535_BYTE 0x10 +#define ALI1535_BYTE_DATA 0x20 +#define ALI1535_WORD_DATA 0x30 +#define ALI1535_BLOCK_DATA 0x40 +#define ALI1535_I2C_READ 0x60 + +#define ALI1535_DEV10B_EN 0x80 /* Enable 10-bit addressing in */ + /* I2C read */ +#define ALI1535_T_OUT 0x08 /* Time-out Command (write) */ +#define ALI1535_A_HIGH_BIT9 0x08 /* Bit 9 of 10-bit address in */ + /* Alert-Response-Address */ + /* (read) */ +#define ALI1535_KILL 0x04 /* Kill Command (write) */ +#define ALI1535_A_HIGH_BIT8 0x04 /* Bit 8 of 10-bit address in */ + /* Alert-Response-Address */ + /* (read) */ + +#define ALI1535_D_HI_MASK 0x03 /* Mask for isolating bits 9-8 */ + /* of 10-bit address in I2C */ + /* Read Command */ + +/* ALI1535 status register bits */ +#define ALI1535_STS_IDLE 0x04 +#define ALI1535_STS_BUSY 0x08 /* host busy */ +#define ALI1535_STS_DONE 0x10 /* transaction complete */ +#define ALI1535_STS_DEV 0x20 /* device error */ +#define ALI1535_STS_BUSERR 0x40 /* bus error */ +#define ALI1535_STS_FAIL 0x80 /* failed bus transaction */ +#define ALI1535_STS_ERR 0xE0 /* all the bad error bits */ + +#define ALI1535_BLOCK_CLR 0x04 /* reset block data index */ + +/* ALI1535 device address register bits */ +#define ALI1535_RD_ADDR 0x01 /* Read/Write Bit in Device */ + /* Address field */ + /* -> Write = 0 */ + /* -> Read = 1 */ +#define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */ + +#ifdef MODULE +static +#else +extern +#endif +int __init i2c_ali1535_init(void); +static int __init ali1535_cleanup(void); +static int ali1535_setup(void); +static s32 ali1535_access(struct i2c_adapter *adap, u16 addr, + unsigned short flags, char read_write, + u8 command, int size, + union i2c_smbus_data *data); +static void ali1535_do_pause(unsigned int amount); +static int ali1535_transaction(void); +static void ali1535_inc(struct i2c_adapter *adapter); +static void ali1535_dec(struct i2c_adapter *adapter); +static u32 ali1535_func(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 */ ali1535_access, + /* slave_send */ NULL, + /* slave_rcv */ NULL, + /* algo_control */ NULL, + /* functionality */ ali1535_func, +}; + +static struct i2c_adapter ali1535_adapter = { + "unset", + I2C_ALGO_SMBUS | I2C_HW_SMBUS_ALI1535, + &smbus_algorithm, + NULL, + ali1535_inc, + ali1535_dec, + NULL, + NULL, +}; + +static int __initdata ali1535_initialized; +static unsigned short ali1535_smba = 0; +DECLARE_MUTEX(i2c_ali1535_sem); + + +/* Detect whether a ALI1535 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 ali1535_setup(void) +{ + int error_return = 0; + unsigned char temp; + + struct pci_dev *ALI1535_dev; + + /* First check whether we can access PCI at all */ + if (pci_present() == 0) { + printk("i2c-ali1535.o: Error: No PCI-bus found!\n"); + error_return = -ENODEV; + goto END; + } + + /* Look for the ALI1535, M7101 device */ + ALI1535_dev = NULL; + ALI1535_dev = pci_find_device(PCI_VENDOR_ID_AL, + PCI_DEVICE_ID_AL_M7101, + ALI1535_dev); + + if (ALI1535_dev == NULL) { + printk("i2c-ali1535.o: Error: Can't detect ali1535!\n"); + error_return = -ENODEV; + goto END; + } + +/* Check the following things: + - SMB I/O address is initialized + - Device is enabled + - We can use the addresses +*/ + +/* Determine the address of the SMBus area */ + pci_read_config_word(ALI1535_dev, SMBBA, &ali1535_smba); + ali1535_smba &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1)); + if (ali1535_smba == 0) { + printk + ("i2c-ali1535.o: ALI1535_smb region uninitialized - upgrade BIOS?\n"); + error_return = -ENODEV; + } + + if (error_return == -ENODEV) + goto END; + + if (check_region(ali1535_smba, ALI1535_SMB_IOSIZE)) { + printk + ("i2c-ali1535.o: ALI1535_smb region 0x%x already in use!\n", + ali1535_smba); + error_return = -ENODEV; + } + + if (error_return == -ENODEV) + goto END; + + /* check if whole device is enabled */ + pci_read_config_byte(ALI1535_dev, SMBCFG, &temp); + if ((temp & ALI1535_SMBIO_EN) == 0) { + printk + ("i2c-ali1535.o: SMB device not enabled - upgrade BIOS?\n"); + error_return = -ENODEV; + goto END; + } + +/* Is SMB Host controller enabled? */ + pci_read_config_byte(ALI1535_dev, SMBHSTCFG, &temp); + if ((temp & 1) == 0) { + printk + ("i2c-ali1535.o: SMBus controller not enabled - upgrade BIOS?\n"); + error_return = -ENODEV; + goto END; + } + +/* set SMB clock to 74KHz as recommended in data sheet */ + pci_write_config_byte(ALI1535_dev, SMBCLK, 0x20); + + /* Everything is happy, let's grab the memory and set things up. */ + request_region(ali1535_smba, ALI1535_SMB_IOSIZE, "ali1535-smb"); + +#ifdef DEBUG +/* + The interrupt routing for SMB is set up in register 0x77 in the + 1533 ISA Bridge device, NOT in the 7101 device. + Don't bother with finding the 1533 device and reading the register. + if ((....... & 0x0F) == 1) + printk("i2c-ali1535.o: ALI1535 using Interrupt 9 for SMBus.\n"); +*/ + pci_read_config_byte(ALI1535_dev, SMBREV, &temp); + printk("i2c-ali1535.o: SMBREV = 0x%X\n", temp); + printk("i2c-ali1535.o: ALI1535_smba = 0x%X\n", ali1535_smba); +#endif /* DEBUG */ + + END: + return error_return; +} + + +/* Internally used pause function */ +void ali1535_do_pause(unsigned int amount) +{ + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(amount); +} + +/* Another internally used function */ +int ali1535_transaction(void) +{ + int temp; + int result = 0; + int timeout = 0; + +#ifdef DEBUG + printk + ("i2c-ali1535.o: Transaction (pre): STS=%02x, TYP=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, " + "DAT1=%02x\n", inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), + inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), + inb_p(SMBHSTDAT1)); +#endif + + /* get status */ + temp = inb_p(SMBHSTSTS); + + /* Make sure the SMBus host is ready to start transmitting */ + /* Check the busy bit first */ + if (temp & ALI1535_STS_BUSY) { +/* + If the host controller is still busy, it may have timed out in the previous transaction, + resulting in a "SMBus Timeout" printk. + I've tried the following to reset a stuck busy bit. + 1. Reset the controller with an KILL command. + (this doesn't seem to clear the controller if an external device is hung) + 2. Reset the controller and the other SMBus devices with a T_OUT command. + (this clears the host busy bit if an external device is hung, + but it comes back upon a new access to a device) + 3. Disable and reenable the controller in SMBHSTCFG + Worst case, nothing seems to work except power reset. +*/ +/* Abort - reset the host controller */ +/* +#ifdef DEBUG + printk("i2c-ali1535.o: Resetting host controller to clear busy condition\n",temp); +#endif + outb_p(ALI1535_KILL, SMBHSTTYP); + temp = inb_p(SMBHSTSTS); + if (temp & ALI1535_STS_BUSY) { +*/ + +/* + Try resetting entire SMB bus, including other devices - + This may not work either - it clears the BUSY bit but + then the BUSY bit may come back on when you try and use the chip again. + If that's the case you are stuck. +*/ + printk + ("i2c-ali1535.o: Resetting entire SMB Bus to clear busy condition (%02x)\n", + temp); + outb_p(ALI1535_T_OUT, SMBHSTTYP); + temp = inb_p(SMBHSTSTS); + } +/* + } +*/ + + /* now check the error bits and the busy bit */ + if (temp & (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { + /* do a clear-on-write */ + outb_p(0xFF, SMBHSTSTS); + if ((temp = inb_p(SMBHSTSTS)) & + (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { + /* this is probably going to be correctable only by a power reset + as one of the bits now appears to be stuck */ + /* This may be a bus or device with electrical problems. */ + printk + ("i2c-ali1535.o: SMBus reset failed! (0x%02x) - controller or device on bus is probably hung\n", + temp); + return -1; + } + } else { + /* check and clear done bit */ + if (temp & ALI1535_STS_DONE) { + outb_p(temp, SMBHSTSTS); + } + } + + /* start the transaction by writing anything to the start register */ + outb_p(0xFF, SMBHSTPORT); + + /* We will always wait for a fraction of a second! */ + timeout = 0; + do { + ali1535_do_pause(1); + temp = inb_p(SMBHSTSTS); + } while (((temp & ALI1535_STS_BUSY) && !(temp & ALI1535_STS_IDLE)) + && (timeout++ < MAX_TIMEOUT)); + + /* If the SMBus is still busy, we give up */ + if (timeout >= MAX_TIMEOUT) { + result = -1; + printk("i2c-ali1535.o: SMBus Timeout!\n"); + } + + if (temp & ALI1535_STS_FAIL) { + result = -1; +#ifdef DEBUG + printk("i2c-ali1535.o: Error: Failed bus transaction\n"); +#endif + } + +/* + Unfortunately the ALI SMB controller maps "no response" and "bus collision" + into a single bit. No reponse is the usual case so don't do a printk. + This means that bus collisions go unreported. +*/ + if (temp & ALI1535_STS_BUSERR) { + result = -1; +#ifdef DEBUG + printk + ("i2c-ali1535.o: Error: no response or bus collision ADD=%02x\n", + inb_p(SMBHSTADD)); +#endif + } + +/* haven't ever seen this */ + if (temp & ALI1535_STS_DEV) { + result = -1; + printk("i2c-ali1535.o: Error: device error\n"); + } + +/* + check to see if the "command complete" indication is set + */ + if (!(temp & ALI1535_STS_DONE)) { + result = -1; + printk("i2c-ali1535.o: Error: command never completed\n"); + } +#ifdef DEBUG + printk + ("i2c-ali1535.o: Transaction (post): STS=%02x, TYP=%02x, CMD=%02x, ADD=%02x, " + "DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), + inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), + inb_p(SMBHSTDAT1)); +#endif + +/* + take consequent actions for error conditions + */ + if (!(temp & ALI1535_STS_DONE)) { + /* issue "kill" to reset host controller */ + outb_p(ALI1535_KILL,SMBHSTTYP); + outb_p(0xFF,SMBHSTSTS); + } + else if (temp & ALI1535_STS_ERR) { + /* issue "timeout" to reset all devices on bus */ + outb_p(ALI1535_T_OUT,SMBHSTTYP); + outb_p(0xFF,SMBHSTSTS); + } + + return result; +} + +/* Return -1 on error. See smbus.h for more information */ +s32 ali1535_access(struct i2c_adapter * adap, u16 addr, + unsigned short flags, char read_write, u8 command, + int size, union i2c_smbus_data * data) +{ + int i, len; + int temp; + int timeout; + s32 result = 0; + + down(&i2c_ali1535_sem); +/* make sure SMBus is idle */ + temp = inb_p(SMBHSTSTS); + for (timeout = 0; + (timeout < MAX_TIMEOUT) && !(temp & ALI1535_STS_IDLE); + timeout++) { + ali1535_do_pause(1); + temp = inb_p(SMBHSTSTS); + } + if (timeout >= MAX_TIMEOUT) { + printk("i2c-ali1535.o: Idle wait Timeout! STS=0x%02x\n", + temp); + } + +/* clear status register (clear-on-write) */ + outb_p(0xFF, SMBHSTSTS); + + switch (size) { + case I2C_SMBUS_PROC_CALL: + printk + ("i2c-ali1535.o: I2C_SMBUS_PROC_CALL not supported!\n"); + result = -1; + goto EXIT; + case I2C_SMBUS_QUICK: + outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMBHSTADD); + size = ALI1535_QUICK; + outb_p(size, SMBHSTTYP); /* output command */ + break; + case I2C_SMBUS_BYTE: + outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMBHSTADD); + size = ALI1535_BYTE; + outb_p(size, SMBHSTTYP); /* output command */ + if (read_write == I2C_SMBUS_WRITE) + outb_p(command, SMBHSTCMD); + break; + case I2C_SMBUS_BYTE_DATA: + outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMBHSTADD); + size = ALI1535_BYTE_DATA; + outb_p(size, SMBHSTTYP); /* output command */ + outb_p(command, SMBHSTCMD); + if (read_write == I2C_SMBUS_WRITE) + outb_p(data->byte, SMBHSTDAT0); + break; + case I2C_SMBUS_WORD_DATA: + outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMBHSTADD); + size = ALI1535_WORD_DATA; + outb_p(size, SMBHSTTYP); /* output command */ + outb_p(command, SMBHSTCMD); + if (read_write == I2C_SMBUS_WRITE) { + outb_p(data->word & 0xff, SMBHSTDAT0); + outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); + } + break; + case I2C_SMBUS_BLOCK_DATA: + outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMBHSTADD); + size = ALI1535_BLOCK_DATA; + outb_p(size, SMBHSTTYP); /* output command */ + outb_p(command, SMBHSTCMD); + if (read_write == I2C_SMBUS_WRITE) { + len = data->block[0]; + if (len < 0) { + len = 0; + data->block[0] = len; + } + if (len > 32) { + len = 32; + data->block[0] = len; + } + outb_p(len, SMBHSTDAT0); + outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); /* Reset SMBBLKDAT */ + for (i = 1; i <= len; i++) + outb_p(data->block[i], SMBBLKDAT); + } + break; + } + + if (ali1535_transaction()) /* Error in transaction */ + { + result = -1; + goto EXIT; + } + + if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK)) + { + result = 0; + goto EXIT; + } + + switch (size) { + case ALI1535_BYTE: /* Result put in SMBHSTDAT0 */ + data->byte = inb_p(SMBHSTDAT0); + break; + case ALI1535_BYTE_DATA: + data->byte = inb_p(SMBHSTDAT0); + break; + case ALI1535_WORD_DATA: + data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); + break; + case ALI1535_BLOCK_DATA: + len = inb_p(SMBHSTDAT0); + if (len > 32) + len = 32; + data->block[0] = len; + outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); /* Reset SMBBLKDAT */ + for (i = 1; i <= data->block[0]; i++) { + data->block[i] = inb_p(SMBBLKDAT); +#ifdef DEBUG + printk + ("i2c-ali1535.o: Blk: len=%d, i=%d, data=%02x\n", + len, i, data->block[i]); +#endif /* DEBUG */ + } + break; + } +EXIT: + up(&i2c_ali1535_sem); + return result; +} + +void ali1535_inc(struct i2c_adapter *adapter) +{ + MOD_INC_USE_COUNT; +} + +void ali1535_dec(struct i2c_adapter *adapter) +{ + + MOD_DEC_USE_COUNT; +} + +u32 ali1535_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_ali1535_init(void) +{ + int res; + printk("i2c-ali1535.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 (ali1535_initialized) { + printk + ("i2c-ali1535.o: Oops, ali1535_init called a second time!\n"); + return -EBUSY; + } +#endif + ali1535_initialized = 0; + if ((res = ali1535_setup())) { + printk + ("i2c-ali1535.o: ALI1535 not detected, module not inserted.\n"); + ali1535_cleanup(); + return res; + } + ali1535_initialized++; + sprintf(ali1535_adapter.name, "SMBus ALI1535 adapter at %04x", + ali1535_smba); + if ((res = i2c_add_adapter(&ali1535_adapter))) { + printk + ("i2c-ali1535.o: Adapter registration failed, module not inserted.\n"); + ali1535_cleanup(); + return res; + } + ali1535_initialized++; + printk + ("i2c-ali1535.o: ALI1535 SMBus Controller detected and initialized\n"); + return 0; +} + +int __init ali1535_cleanup(void) +{ + int res; + if (ali1535_initialized >= 2) { + if ((res = i2c_del_adapter(&ali1535_adapter))) { + printk + ("i2c-ali1535.o: i2c_del_adapter failed, module not removed\n"); + return res; + } else + ali1535_initialized--; + } + if (ali1535_initialized >= 1) { + release_region(ali1535_smba, ALI1535_SMB_IOSIZE); + ali1535_initialized--; + } + return 0; +} + +#ifdef RLX +EXPORT_SYMBOL(ali1535_smba); +EXPORT_SYMBOL(ali1535_access); +EXPORT_SYMBOL(i2c_ali1535_sem); +#else +EXPORT_NO_SYMBOLS; +#endif + +#ifdef MODULE + +MODULE_AUTHOR + ("Frodo Looijaard , Philip Edelbrock ,\n" + "Mark D. Studebaker and Dan Eaton "); +MODULE_DESCRIPTION("ALI1535 SMBus driver"); + +int init_module(void) +{ + return i2c_ali1535_init(); +} + +int cleanup_module(void) +{ + return ali1535_cleanup(); +} + +#endif /* MODULE */ + --- /dev/null 1994-07-17 19:46:18.000000000 -0400 +++ linux/drivers/i2c/busses/i2c-ali15x3.c 2002-05-20 01:52:13.000000000 -0400 @@ -0,0 +1,646 @@ +/* + ali15x3.c - Part of lm_sensors, Linux kernel modules for hardware + monitoring + Copyright (c) 1999 Frodo Looijaard and + Philip Edelbrock and + Mark D. Studebaker + + 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. +*/ + +/* + This is the driver for the SMB Host controller on + Acer Labs Inc. (ALI) M1541 and M1543C South Bridges. + + The M1543C is a South bridge for desktop systems. + The M1533 is a South bridge for portable systems. + They are part of the following ALI chipsets: + "Aladdin Pro 2": Includes the M1621 Slot 1 North bridge + with AGP and 100MHz CPU Front Side bus + "Aladdin V": Includes the M1541 Socket 7 North bridge + with AGP and 100MHz CPU Front Side bus + "Aladdin IV": Includes the M1541 Socket 7 North bridge + with host bus up to 83.3 MHz. + For an overview of these chips see http://www.acerlabs.com + + The M1533/M1543C devices appear as FOUR separate devices + on the PCI bus. An output of lspci will show something similar + to the following: + + 00:02.0 USB Controller: Acer Laboratories Inc. M5237 + 00:03.0 Bridge: Acer Laboratories Inc. M7101 + 00:07.0 ISA bridge: Acer Laboratories Inc. M1533 + 00:0f.0 IDE interface: Acer Laboratories Inc. M5229 + + The SMB controller is part of the 7101 device, which is an + ACPI-compliant Power Management Unit (PMU). + + The whole 7101 device has to be enabled for the SMB to work. + You can't just enable the SMB alone. + The SMB and the ACPI have separate I/O spaces. + We make sure that the SMB is enabled. We leave the ACPI alone. + + This driver controls the SMB Host only. + The SMB Slave controller on the M15X3 is not enabled. + + This driver does not use interrupts. +*/ + +/* Note: we assume there can only be one ALI15X3, with one SMBus interface */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_LICENSE("GPL"); + +/* ALI15X3 SMBus address offsets */ +#define SMBHSTSTS (0 + ali15x3_smba) +#define SMBHSTCNT (1 + ali15x3_smba) +#define SMBHSTSTART (2 + ali15x3_smba) +#define SMBHSTCMD (7 + ali15x3_smba) +#define SMBHSTADD (3 + ali15x3_smba) +#define SMBHSTDAT0 (4 + ali15x3_smba) +#define SMBHSTDAT1 (5 + ali15x3_smba) +#define SMBBLKDAT (6 + ali15x3_smba) + +/* PCI Address Constants */ +#define SMBCOM 0x004 +#define SMBBA 0x014 +#define SMBATPC 0x05B /* used to unlock xxxBA registers */ +#define SMBHSTCFG 0x0E0 +#define SMBSLVC 0x0E1 +#define SMBCLK 0x0E2 +#define SMBREV 0x008 + +/* Other settings */ +#define MAX_TIMEOUT 200 /* times 1/100 sec */ +#define ALI15X3_SMB_IOSIZE 32 + +/* this is what the Award 1004 BIOS sets them to on a ASUS P5A MB. + We don't use these here. If the bases aren't set to some value we + tell user to upgrade BIOS and we fail. +*/ +#define ALI15X3_SMB_DEFAULTBASE 0xE800 + +/* ALI15X3 address lock bits */ +#define ALI15X3_LOCK 0x06 + +/* ALI15X3 command constants */ +#define ALI15X3_ABORT 0x02 +#define ALI15X3_T_OUT 0x04 +#define ALI15X3_QUICK 0x00 +#define ALI15X3_BYTE 0x10 +#define ALI15X3_BYTE_DATA 0x20 +#define ALI15X3_WORD_DATA 0x30 +#define ALI15X3_BLOCK_DATA 0x40 +#define ALI15X3_BLOCK_CLR 0x80 + +/* ALI15X3 status register bits */ +#define ALI15X3_STS_IDLE 0x04 +#define ALI15X3_STS_BUSY 0x08 +#define ALI15X3_STS_DONE 0x10 +#define ALI15X3_STS_DEV 0x20 /* device error */ +#define ALI15X3_STS_COLL 0x40 /* collision or no response */ +#define ALI15X3_STS_TERM 0x80 /* terminated by abort */ +#define ALI15X3_STS_ERR 0xE0 /* all the bad error bits */ + + +/* If force_addr is set to anything different from 0, we forcibly enable + the device at the given address. */ +static int force_addr = 0; +MODULE_PARM(force_addr, "i"); +MODULE_PARM_DESC(force_addr, + "Initialize the base address of the i2c controller"); + +#ifdef MODULE +static +#else +extern +#endif +int __init i2c_ali15x3_init(void); +static int __init ali15x3_cleanup(void); +static int ali15x3_setup(void); +static s32 ali15x3_access(struct i2c_adapter *adap, u16 addr, + unsigned short flags, char read_write, + u8 command, int size, + union i2c_smbus_data *data); +static void ali15x3_do_pause(unsigned int amount); +static int ali15x3_transaction(void); +static void ali15x3_inc(struct i2c_adapter *adapter); +static void ali15x3_dec(struct i2c_adapter *adapter); +static u32 ali15x3_func(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 */ ali15x3_access, + /* slave_send */ NULL, + /* slave_rcv */ NULL, + /* algo_control */ NULL, + /* functionality */ ali15x3_func, +}; + +static struct i2c_adapter ali15x3_adapter = { + "unset", + I2C_ALGO_SMBUS | I2C_HW_SMBUS_ALI15X3, + &smbus_algorithm, + NULL, + ali15x3_inc, + ali15x3_dec, + NULL, + NULL, +}; + +static int __initdata ali15x3_initialized; +static unsigned short ali15x3_smba = 0; +static int locked=0; + +/* Detect whether a ALI15X3 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 ali15x3_setup(void) +{ + u16 a; + unsigned char temp; + + struct pci_dev *ALI15X3_dev; + + /* First check whether we can access PCI at all */ + if (pci_present() == 0) { + printk("i2c-ali15x3.o: Error: No PCI-bus found!\n"); + return -ENODEV; + } + + /* Look for the ALI15X3, M7101 device */ + ALI15X3_dev = NULL; + ALI15X3_dev = pci_find_device(PCI_VENDOR_ID_AL, + PCI_DEVICE_ID_AL_M7101, ALI15X3_dev); + if (ALI15X3_dev == NULL) { + printk("i2c-ali15x3.o: Error: Can't detect ali15x3!\n"); + return -ENODEV; + } + +/* Check the following things: + - SMB I/O address is initialized + - Device is enabled + - We can use the addresses +*/ + +/* Unlock the register. + The data sheet says that the address registers are read-only + if the lock bits are 1, but in fact the address registers + are zero unless you clear the lock bits. +*/ + pci_read_config_byte(ALI15X3_dev, SMBATPC, &temp); + if (temp & ALI15X3_LOCK) { + temp &= ~ALI15X3_LOCK; + pci_write_config_byte(ALI15X3_dev, SMBATPC, temp); + } + +/* Determine the address of the SMBus area */ + pci_read_config_word(ALI15X3_dev, SMBBA, &ali15x3_smba); + ali15x3_smba &= (0xffff & ~(ALI15X3_SMB_IOSIZE - 1)); + if (ali15x3_smba == 0 && force_addr == 0) { + printk + ("i2c-ali15x3.o: ALI15X3_smb region uninitialized - upgrade BIOS or use force_addr=0xaddr\n"); + return -ENODEV; + } + + if(force_addr) + ali15x3_smba = force_addr & ~(ALI15X3_SMB_IOSIZE - 1); + + if (check_region(ali15x3_smba, ALI15X3_SMB_IOSIZE)) { + printk + ("i2c-ali15x3.o: ALI15X3_smb region 0x%x already in use!\n", + ali15x3_smba); + return -ENODEV; + } + + if(force_addr) { + printk("i2c-ali15x3.o: forcing ISA address 0x%04X\n", ali15x3_smba); + if (PCIBIOS_SUCCESSFUL != + pci_write_config_word(ALI15X3_dev, SMBBA, ali15x3_smba)) + return -ENODEV; + if (PCIBIOS_SUCCESSFUL != + pci_read_config_word(ALI15X3_dev, SMBBA, &a)) + return -ENODEV; + if ((a & ~(ALI15X3_SMB_IOSIZE - 1)) != ali15x3_smba) { + /* make sure it works */ + printk("i2c-ali15x3.o: force address failed - not supported?\n"); + return -ENODEV; + } + } +/* check if whole device is enabled */ + pci_read_config_byte(ALI15X3_dev, SMBCOM, &temp); + if ((temp & 1) == 0) { + printk("i2c-ali15x3: enabling SMBus device\n"); + pci_write_config_byte(ALI15X3_dev, SMBCOM, temp | 0x01); + } + +/* Is SMB Host controller enabled? */ + pci_read_config_byte(ALI15X3_dev, SMBHSTCFG, &temp); + if ((temp & 1) == 0) { + printk("i2c-ali15x3: enabling SMBus controller\n"); + pci_write_config_byte(ALI15X3_dev, SMBHSTCFG, temp | 0x01); + } + +/* set SMB clock to 74KHz as recommended in data sheet */ + pci_write_config_byte(ALI15X3_dev, SMBCLK, 0x20); + + /* Everything is happy, let's grab the memory and set things up. */ + request_region(ali15x3_smba, ALI15X3_SMB_IOSIZE, "ali15x3-smb"); + +#ifdef DEBUG +/* + The interrupt routing for SMB is set up in register 0x77 in the + 1533 ISA Bridge device, NOT in the 7101 device. + Don't bother with finding the 1533 device and reading the register. + if ((....... & 0x0F) == 1) + printk("i2c-ali15x3.o: ALI15X3 using Interrupt 9 for SMBus.\n"); +*/ + pci_read_config_byte(ALI15X3_dev, SMBREV, &temp); + printk("i2c-ali15x3.o: SMBREV = 0x%X\n", temp); + printk("i2c-ali15x3.o: ALI15X3_smba = 0x%X\n", ali15x3_smba); +#endif /* DEBUG */ + + return 0; +} + + +/* Internally used pause function */ +void ali15x3_do_pause(unsigned int amount) +{ + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(amount); +} + +/* Another internally used function */ +int ali15x3_transaction(void) +{ + int temp; + int result = 0; + int timeout = 0; + +#ifdef DEBUG + printk + ("i2c-ali15x3.o: Transaction (pre): STS=%02x, CNT=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, " + "DAT1=%02x\n", inb_p(SMBHSTSTS), inb_p(SMBHSTCNT), + inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), + inb_p(SMBHSTDAT1)); +#endif + + /* get status */ + temp = inb_p(SMBHSTSTS); + + /* Make sure the SMBus host is ready to start transmitting */ + /* Check the busy bit first */ + if (temp & ALI15X3_STS_BUSY) { +/* + If the host controller is still busy, it may have timed out in the previous transaction, + resulting in a "SMBus Timeout" printk. + I've tried the following to reset a stuck busy bit. + 1. Reset the controller with an ABORT command. + (this doesn't seem to clear the controller if an external device is hung) + 2. Reset the controller and the other SMBus devices with a T_OUT command. + (this clears the host busy bit if an external device is hung, + but it comes back upon a new access to a device) + 3. Disable and reenable the controller in SMBHSTCFG + Worst case, nothing seems to work except power reset. +*/ +/* Abort - reset the host controller */ +/* +#ifdef DEBUG + printk("i2c-ali15x3.o: Resetting host controller to clear busy condition\n",temp); +#endif + outb_p(ALI15X3_ABORT, SMBHSTCNT); + temp = inb_p(SMBHSTSTS); + if (temp & ALI15X3_STS_BUSY) { +*/ + +/* + Try resetting entire SMB bus, including other devices - + This may not work either - it clears the BUSY bit but + then the BUSY bit may come back on when you try and use the chip again. + If that's the case you are stuck. +*/ + printk + ("i2c-ali15x3.o: Resetting entire SMB Bus to clear busy condition (%02x)\n", + temp); + outb_p(ALI15X3_T_OUT, SMBHSTCNT); + temp = inb_p(SMBHSTSTS); + } +/* + } +*/ + + /* now check the error bits and the busy bit */ + if (temp & (ALI15X3_STS_ERR | ALI15X3_STS_BUSY)) { + /* do a clear-on-write */ + outb_p(0xFF, SMBHSTSTS); + if ((temp = inb_p(SMBHSTSTS)) & + (ALI15X3_STS_ERR | ALI15X3_STS_BUSY)) { + /* this is probably going to be correctable only by a power reset + as one of the bits now appears to be stuck */ + /* This may be a bus or device with electrical problems. */ + printk + ("i2c-ali15x3.o: SMBus reset failed! (0x%02x) - controller or device on bus is probably hung\n", + temp); + return -1; + } + } else { + /* check and clear done bit */ + if (temp & ALI15X3_STS_DONE) { + outb_p(temp, SMBHSTSTS); + } + } + + /* start the transaction by writing anything to the start register */ + outb_p(0xFF, SMBHSTSTART); + + /* We will always wait for a fraction of a second! */ + timeout = 0; + do { + ali15x3_do_pause(1); + temp = inb_p(SMBHSTSTS); + } while ((!(temp & (ALI15X3_STS_ERR | ALI15X3_STS_DONE))) + && (timeout++ < MAX_TIMEOUT)); + + /* If the SMBus is still busy, we give up */ + if (timeout >= MAX_TIMEOUT) { + result = -1; + printk("i2c-ali15x3.o: SMBus Timeout!\n"); + } + + if (temp & ALI15X3_STS_TERM) { + result = -1; +#ifdef DEBUG + printk("i2c-ali15x3.o: Error: Failed bus transaction\n"); +#endif + } + +/* + Unfortunately the ALI SMB controller maps "no response" and "bus collision" + into a single bit. No reponse is the usual case so don't + do a printk. + This means that bus collisions go unreported. +*/ + if (temp & ALI15X3_STS_COLL) { + result = -1; +#ifdef DEBUG + printk + ("i2c-ali15x3.o: Error: no response or bus collision ADD=%02x\n", + inb_p(SMBHSTADD)); +#endif + } + +/* haven't ever seen this */ + if (temp & ALI15X3_STS_DEV) { + result = -1; + printk("i2c-ali15x3.o: Error: device error\n"); + } +#ifdef DEBUG + printk + ("i2c-ali15x3.o: Transaction (post): STS=%02x, CNT=%02x, CMD=%02x, ADD=%02x, " + "DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTSTS), 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 ali15x3_access(struct i2c_adapter * adap, u16 addr, + unsigned short flags, char read_write, u8 command, + int size, union i2c_smbus_data * data) +{ + int i, len; + int temp; + int timeout; + +/* clear all the bits (clear-on-write) */ + outb_p(0xFF, SMBHSTSTS); +/* make sure SMBus is idle */ + temp = inb_p(SMBHSTSTS); + for (timeout = 0; + (timeout < MAX_TIMEOUT) && !(temp & ALI15X3_STS_IDLE); + timeout++) { + ali15x3_do_pause(1); + temp = inb_p(SMBHSTSTS); + } + if (timeout >= MAX_TIMEOUT) { + printk("i2c-ali15x3.o: Idle wait Timeout! STS=0x%02x\n", + temp); + } + + switch (size) { + case I2C_SMBUS_PROC_CALL: + printk + ("i2c-ali15x3.o: I2C_SMBUS_PROC_CALL not supported!\n"); + return -1; + case I2C_SMBUS_QUICK: + outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMBHSTADD); + size = ALI15X3_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 = ALI15X3_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 = ALI15X3_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 = ALI15X3_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; + data->block[0] = len; + } + if (len > 32) { + len = 32; + data->block[0] = len; + } + outb_p(len, SMBHSTDAT0); + outb_p(inb_p(SMBHSTCNT) | ALI15X3_BLOCK_CLR, SMBHSTCNT); /* Reset SMBBLKDAT */ + for (i = 1; i <= len; i++) + outb_p(data->block[i], SMBBLKDAT); + } + size = ALI15X3_BLOCK_DATA; + break; + } + + outb_p(size, SMBHSTCNT); /* output command */ + + if (ali15x3_transaction()) /* Error in transaction */ + return -1; + + if ((read_write == I2C_SMBUS_WRITE) || (size == ALI15X3_QUICK)) + return 0; + + + switch (size) { + case ALI15X3_BYTE: /* Result put in SMBHSTDAT0 */ + data->byte = inb_p(SMBHSTDAT0); + break; + case ALI15X3_BYTE_DATA: + data->byte = inb_p(SMBHSTDAT0); + break; + case ALI15X3_WORD_DATA: + data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); + break; + case ALI15X3_BLOCK_DATA: + len = inb_p(SMBHSTDAT0); + if (len > 32) + len = 32; + data->block[0] = len; + outb_p(inb_p(SMBHSTCNT) | ALI15X3_BLOCK_CLR, SMBHSTCNT); /* Reset SMBBLKDAT */ + for (i = 1; i <= data->block[0]; i++) { + data->block[i] = inb_p(SMBBLKDAT); +#ifdef DEBUG + printk + ("i2c-ali15x3.o: Blk: len=%d, i=%d, data=%02x\n", + len, i, data->block[i]); +#endif /* DEBUG */ + } + break; + } + return 0; +} + +void ali15x3_inc(struct i2c_adapter *adapter) +{ + MOD_INC_USE_COUNT; +} + +void ali15x3_dec(struct i2c_adapter *adapter) +{ + + MOD_DEC_USE_COUNT; +} + +u32 ali15x3_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_ali15x3_init(void) +{ + int res; + printk("i2c-ali15x3.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 (ali15x3_initialized) { + printk + ("i2c-ali15x3.o: Oops, ali15x3_init called a second time!\n"); + return -EBUSY; + } +#endif + ali15x3_initialized = 0; + if ((res = ali15x3_setup())) { + printk + ("i2c-ali15x3.o: ALI15X3 not detected, module not inserted.\n"); + ali15x3_cleanup(); + return res; + } + ali15x3_initialized++; + sprintf(ali15x3_adapter.name, "SMBus ALI15X3 adapter at %04x", + ali15x3_smba); + if ((res = i2c_add_adapter(&ali15x3_adapter))) { + printk + ("i2c-ali15x3.o: Adapter registration failed, module not inserted.\n"); + ali15x3_cleanup(); + return res; + } + ali15x3_initialized++; + printk + ("i2c-ali15x3.o: ALI15X3 SMBus Controller detected and initialized\n"); + return 0; +} + +int __init ali15x3_cleanup(void) +{ + int res; + if (ali15x3_initialized >= 2) { + if ((res = i2c_del_adapter(&ali15x3_adapter))) { + printk + ("i2c-ali15x3.o: i2c_del_adapter failed, module not removed\n"); + return res; + } else + ali15x3_initialized--; + } + if (ali15x3_initialized >= 1) { + release_region(ali15x3_smba, ALI15X3_SMB_IOSIZE); + ali15x3_initialized--; + } + return 0; +} + +EXPORT_NO_SYMBOLS; + +#ifdef MODULE + +MODULE_AUTHOR + ("Frodo Looijaard , Philip Edelbrock , and Mark D. Studebaker "); +MODULE_DESCRIPTION("ALI15X3 SMBus driver"); + +int init_module(void) +{ + return i2c_ali15x3_init(); +} + +int cleanup_module(void) +{ + return ali15x3_cleanup(); +} + +#endif /* MODULE */ --- /dev/null 1994-07-17 19:46:18.000000000 -0400 +++ linux/drivers/i2c/busses/i2c-amd756.c 2002-05-20 01:52:33.000000000 -0400 @@ -0,0 +1,505 @@ +/* + amd756.c - Part of lm_sensors, Linux kernel modules for hardware + monitoring + + Copyright (c) 1999 Merlin Hughes + + Shamelessly ripped from i2c-piix4.c: + + Copyright (c) 1998, 1999 Frodo Looijaard and + Philip Edelbrock + + 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. +*/ + +/* + Supports AMD756, AMD766, and AMD768. + Note: we assume there can only be one device, with one SMBus interface. +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_LICENSE("GPL"); + +#ifndef PCI_DEVICE_ID_AMD_756 +#define PCI_DEVICE_ID_AMD_756 0x740B +#endif +#ifndef PCI_DEVICE_ID_AMD_766 +#define PCI_DEVICE_ID_AMD_766 0x7413 +#endif + +static int supported[] = {PCI_DEVICE_ID_AMD_756, + PCI_DEVICE_ID_AMD_766, + 0x7443, /* AMD768 */ + 0 }; + +/* AMD756 SMBus address offsets */ +#define SMB_ADDR_OFFSET 0xE0 +#define SMB_IOSIZE 16 +#define SMB_GLOBAL_STATUS (0x0 + amd756_smba) +#define SMB_GLOBAL_ENABLE (0x2 + amd756_smba) +#define SMB_HOST_ADDRESS (0x4 + amd756_smba) +#define SMB_HOST_DATA (0x6 + amd756_smba) +#define SMB_HOST_COMMAND (0x8 + amd756_smba) +#define SMB_HOST_BLOCK_DATA (0x9 + amd756_smba) +#define SMB_HAS_DATA (0xA + amd756_smba) +#define SMB_HAS_DEVICE_ADDRESS (0xC + amd756_smba) +#define SMB_HAS_HOST_ADDRESS (0xE + amd756_smba) +#define SMB_SNOOP_ADDRESS (0xF + amd756_smba) + +/* PCI Address Constants */ + +/* address of I/O space */ +#define SMBBA 0x058 /* mh */ + +/* general configuration */ +#define SMBGCFG 0x041 /* mh */ + +/* silicon revision code */ +#define SMBREV 0x008 + +/* Other settings */ +#define MAX_TIMEOUT 100 + +/* AMD756 constants */ +#define AMD756_QUICK 0x00 +#define AMD756_BYTE 0x01 +#define AMD756_BYTE_DATA 0x02 +#define AMD756_WORD_DATA 0x03 +#define AMD756_PROCESS_CALL 0x04 +#define AMD756_BLOCK_DATA 0x05 + +/* insmod parameters */ + +#ifdef MODULE +static +#else +extern +#endif +int __init i2c_amd756_init(void); +static int __init amd756_cleanup(void); +static int amd756_setup(void); +static s32 amd756_access(struct i2c_adapter *adap, u16 addr, + unsigned short flags, char read_write, + u8 command, int size, union i2c_smbus_data *data); +static void amd756_do_pause(unsigned int amount); +static int amd756_transaction(void); +static void amd756_inc(struct i2c_adapter *adapter); +static void amd756_dec(struct i2c_adapter *adapter); +static u32 amd756_func(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 */ amd756_access, + /* slave;_send */ NULL, + /* slave_rcv */ NULL, + /* algo_control */ NULL, + /* functionality */ amd756_func, +}; + +static struct i2c_adapter amd756_adapter = { + "unset", + I2C_ALGO_SMBUS | I2C_HW_SMBUS_AMD756, + &smbus_algorithm, + NULL, + amd756_inc, + amd756_dec, + NULL, + NULL, +}; + +static int __initdata amd756_initialized; +static unsigned short amd756_smba = 0; + +/* Detect whether a AMD756 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 amd756_setup(void) +{ + unsigned char temp; + int *num = supported; + struct pci_dev *AMD756_dev = NULL; + + if (pci_present() == 0) { + printk("i2c-amd756.o: Error: No PCI-bus found!\n"); + return(-ENODEV); + } + + /* Look for the AMD756, function 3 */ + /* Note: we keep on searching until we have found 'function 3' */ + do { + if((AMD756_dev = pci_find_device(PCI_VENDOR_ID_AMD, + *num, AMD756_dev))) { + if(PCI_FUNC(AMD756_dev->devfn) != 3) + continue; + break; + } + num++; + } while (*num != 0); + + if (AMD756_dev == NULL) { + printk + ("i2c-amd756.o: Error: Can't detect AMD756, function 3!\n"); + return(-ENODEV); + } + + + pci_read_config_byte(AMD756_dev, SMBGCFG, &temp); + if ((temp & 128) == 0) { + printk + ("i2c-amd756.o: Error: SMBus controller I/O not enabled!\n"); + return(-ENODEV); + } + + /* Determine the address of the SMBus areas */ + /* Technically it is a dword but... */ + pci_read_config_word(AMD756_dev, SMBBA, &amd756_smba); + amd756_smba &= 0xff00; + amd756_smba += SMB_ADDR_OFFSET; + + if (check_region(amd756_smba, SMB_IOSIZE)) { + printk + ("i2c-amd756.o: SMB region 0x%x already in use!\n", + amd756_smba); + return(-ENODEV); + } + + /* Everything is happy, let's grab the memory and set things up. */ + request_region(amd756_smba, SMB_IOSIZE, "amd756-smbus"); + +#ifdef DEBUG + pci_read_config_byte(AMD756_dev, SMBREV, &temp); + printk("i2c-amd756.o: SMBREV = 0x%X\n", temp); + printk("i2c-amd756.o: AMD756_smba = 0x%X\n", amd756_smba); +#endif /* DEBUG */ + + return 0; +} + +/* + SMBUS event = I/O 28-29 bit 11 + see E0 for the status bits and enabled in E2 + +*/ + +/* Internally used pause function */ +void amd756_do_pause(unsigned int amount) +{ + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(amount); +} + +#define GS_ABRT_STS (1 << 0) +#define GS_COL_STS (1 << 1) +#define GS_PRERR_STS (1 << 2) +#define GS_HST_STS (1 << 3) +#define GS_HCYC_STS (1 << 4) +#define GS_TO_STS (1 << 5) +#define GS_SMB_STS (1 << 11) + +#define GS_CLEAR_STS (GS_ABRT_STS | GS_COL_STS | GS_PRERR_STS | \ + GS_HCYC_STS | GS_TO_STS ) + +#define GE_CYC_TYPE_MASK (7) +#define GE_HOST_STC (1 << 3) + +int amd756_transaction(void) +{ + int temp; + int result = 0; + int timeout = 0; + +#ifdef DEBUG + printk + ("i2c-amd756.o: Transaction (pre): GS=%04x, GE=%04x, ADD=%04x, DAT=%04x\n", + inw_p(SMB_GLOBAL_STATUS), inw_p(SMB_GLOBAL_ENABLE), + inw_p(SMB_HOST_ADDRESS), inb_p(SMB_HOST_DATA)); +#endif + + /* Make sure the SMBus host is ready to start transmitting */ + if ((temp = inw_p(SMB_GLOBAL_STATUS)) & (GS_HST_STS | GS_SMB_STS)) { +#ifdef DEBUG + printk + ("i2c-amd756.o: SMBus busy (%04x). Waiting... \n", temp); +#endif + do { + amd756_do_pause(1); + temp = inw_p(SMB_GLOBAL_STATUS); + } while ((temp & (GS_HST_STS | GS_SMB_STS)) && + (timeout++ < MAX_TIMEOUT)); + /* If the SMBus is still busy, we give up */ + if (timeout >= MAX_TIMEOUT) { + printk("i2c-amd756.o: Busy wait timeout! (%04x)\n", + temp); + return(-1); + } + timeout = 0; + } + + /* start the transaction by setting the start bit */ + outw_p(inw(SMB_GLOBAL_ENABLE) | GE_HOST_STC, SMB_GLOBAL_ENABLE); + + /* We will always wait for a fraction of a second! */ + do { + amd756_do_pause(1); + temp = inw_p(SMB_GLOBAL_STATUS); + } while ((temp & GS_HST_STS) && (timeout++ < MAX_TIMEOUT)); + + /* If the SMBus is still busy, we give up */ + if (timeout >= MAX_TIMEOUT) { + printk("i2c-amd756.o: Completion timeout!\n"); + return(-1); + } + + if (temp & GS_PRERR_STS) { + result = -1; +#ifdef DEBUG + printk("i2c-amd756.o: SMBus Protocol error (no response)!\n"); +#endif + } + + if (temp & GS_COL_STS) { + result = -1; + printk("i2c-amd756.o: SMBus collision!\n"); + /* TODO: Clear Collision Status with a 1 */ + } + + if (temp & GS_TO_STS) { + result = -1; +#ifdef DEBUG + printk("i2c-amd756.o: SMBus protocol timeout!\n"); +#endif + } +#ifdef DEBUG + if (temp & GS_HCYC_STS) { + printk("i2c-amd756.o: SMBus protocol success!\n"); + } +#endif + + outw_p(GS_CLEAR_STS, SMB_GLOBAL_STATUS); + +#ifdef DEBUG + if (((temp = inw_p(SMB_GLOBAL_STATUS)) & GS_CLEAR_STS) != 0x00) { + printk + ("i2c-amd756.o: Failed reset at end of transaction (%04x)\n", + temp); + } + printk + ("i2c-amd756.o: Transaction (post): GS=%04x, GE=%04x, ADD=%04x, DAT=%04x\n", + inw_p(SMB_GLOBAL_STATUS), inw_p(SMB_GLOBAL_ENABLE), + inw_p(SMB_HOST_ADDRESS), inb_p(SMB_HOST_DATA)); +#endif + + return result; +} + +/* Return -1 on error. See smbus.h for more information */ +s32 amd756_access(struct i2c_adapter * adap, u16 addr, + unsigned short flags, char read_write, + u8 command, int size, union i2c_smbus_data * data) +{ + int i, len; + + /** TODO: Should I supporte the 10-bit transfers? */ + switch (size) { + case I2C_SMBUS_PROC_CALL: + printk + ("i2c-amd756.o: I2C_SMBUS_PROC_CALL not supported!\n"); + /* TODO: Well... It is supported, I'm just not sure what to do here... */ + return -1; + case I2C_SMBUS_QUICK: + outw_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMB_HOST_ADDRESS); + size = AMD756_QUICK; + break; + case I2C_SMBUS_BYTE: + outw_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMB_HOST_ADDRESS); + /* TODO: Why only during write? */ + if (read_write == I2C_SMBUS_WRITE) + outb_p(command, SMB_HOST_COMMAND); + size = AMD756_BYTE; + break; + case I2C_SMBUS_BYTE_DATA: + outw_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMB_HOST_ADDRESS); + outb_p(command, SMB_HOST_COMMAND); + if (read_write == I2C_SMBUS_WRITE) + outw_p(data->byte, SMB_HOST_DATA); + size = AMD756_BYTE_DATA; + break; + case I2C_SMBUS_WORD_DATA: + outw_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMB_HOST_ADDRESS); + outb_p(command, SMB_HOST_COMMAND); + if (read_write == I2C_SMBUS_WRITE) + outw_p(data->word, SMB_HOST_DATA); /* TODO: endian???? */ + size = AMD756_WORD_DATA; + break; + case I2C_SMBUS_BLOCK_DATA: + outw_p(((addr & 0x7f) << 1) | (read_write & 0x01), + SMB_HOST_ADDRESS); + outb_p(command, SMB_HOST_COMMAND); + if (read_write == I2C_SMBUS_WRITE) { + len = data->block[0]; + if (len < 0) + len = 0; + if (len > 32) + len = 32; + outw_p(len, SMB_HOST_DATA); + /* i = inw_p(SMBHSTCNT); Reset SMBBLKDAT */ + for (i = 1; i <= len; i++) + outb_p(data->block[i], + SMB_HOST_BLOCK_DATA); + } + size = AMD756_BLOCK_DATA; + break; + } + + /* How about enabling interrupts... */ + outw_p(size & GE_CYC_TYPE_MASK, SMB_GLOBAL_ENABLE); + + if (amd756_transaction()) /* Error in transaction */ + return -1; + + if ((read_write == I2C_SMBUS_WRITE) || (size == AMD756_QUICK)) + return 0; + + + switch (size) { + case AMD756_BYTE: + data->byte = inw_p(SMB_HOST_DATA); + break; + case AMD756_BYTE_DATA: + data->byte = inw_p(SMB_HOST_DATA); + break; + case AMD756_WORD_DATA: + data->word = inw_p(SMB_HOST_DATA); /* TODO: endian???? */ + break; + case AMD756_BLOCK_DATA: + data->block[0] = inw_p(SMB_HOST_DATA & 63); + /* i = inw_p(SMBHSTCNT); Reset SMBBLKDAT */ + for (i = 1; i <= data->block[0]; i++) + data->block[i] = inb_p(SMB_HOST_BLOCK_DATA); + break; + } + + return 0; +} + +void amd756_inc(struct i2c_adapter *adapter) +{ + MOD_INC_USE_COUNT; +} + +void amd756_dec(struct i2c_adapter *adapter) +{ + + MOD_DEC_USE_COUNT; +} + +u32 amd756_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 | I2C_FUNC_SMBUS_PROC_CALL; +} + +int __init i2c_amd756_init(void) +{ + int res; + printk("i2c-amd756.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 (amd756_initialized) { + printk + ("i2c-amd756.o: Oops, amd756_init called a second time!\n"); + return -EBUSY; + } +#endif + amd756_initialized = 0; + if ((res = amd756_setup())) { + printk + ("i2c-amd756.o: AMD756/766 not detected, module not inserted.\n"); + amd756_cleanup(); + return res; + } + amd756_initialized++; + sprintf(amd756_adapter.name, "SMBus AMD7X6 adapter at %04x", + amd756_smba); + if ((res = i2c_add_adapter(&amd756_adapter))) { + printk + ("i2c-amd756.o: Adapter registration failed, module not inserted.\n"); + amd756_cleanup(); + return res; + } + amd756_initialized++; + printk("i2c-amd756.o: AMD756/766 bus detected and initialized\n"); + return 0; +} + +int __init amd756_cleanup(void) +{ + int res; + if (amd756_initialized >= 2) { + if ((res = i2c_del_adapter(&amd756_adapter))) { + printk + ("i2c-amd756.o: i2c_del_adapter failed, module not removed\n"); + return res; + } else + amd756_initialized--; + } + if (amd756_initialized >= 1) { + release_region(amd756_smba, SMB_IOSIZE); + amd756_initialized--; + } + return 0; +} + +EXPORT_NO_SYMBOLS; + +#ifdef MODULE + +MODULE_AUTHOR("Merlin Hughes "); +MODULE_DESCRIPTION("AMD756/766 SMBus driver"); + +int init_module(void) +{ + return i2c_amd756_init(); +} + +int cleanup_module(void) +{ + return amd756_cleanup(); +} + +#endif /* MODULE */ --- /dev/null 1994-07-17 19:46:18.000000000 -0400 +++ linux/drivers/i2c/busses/i2c-hydra.c 2002-05-20 01:53:01.000000000 -0400 @@ -0,0 +1,205 @@ +/* + i2c-hydra.c - Part of lm_sensors, Linux kernel modules + for hardware monitoring + + i2c Support for the Apple `Hydra' Mac I/O + + Copyright (c) 1999 Geert Uytterhoeven + + Based on i2c Support for Via Technologies 82C586B South Bridge + Copyright (c) 1998, 1999 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. +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_LICENSE("GPL"); + +/* PCI device */ +#define VENDOR PCI_VENDOR_ID_APPLE +#define DEVICE PCI_DEVICE_ID_APPLE_HYDRA + +#define HYDRA_CACHE_PD 0x00000030 + +#define HYDRA_CPD_PD0 0x00000001 /* CachePD lines */ +#define HYDRA_CPD_PD1 0x00000002 +#define HYDRA_CPD_PD2 0x00000004 +#define HYDRA_CPD_PD3 0x00000008 + +#define HYDRA_SCLK HYDRA_CPD_PD0 +#define HYDRA_SDAT HYDRA_CPD_PD1 +#define HYDRA_SCLK_OE 0x00000010 +#define HYDRA_SDAT_OE 0x00000020 + +static unsigned long hydra_base; + +static inline void pdregw(u32 val) +{ + writel(val, hydra_base + HYDRA_CACHE_PD); +} + +static inline u32 pdregr(void) +{ + u32 val = readl(hydra_base + HYDRA_CACHE_PD); + return val; +} + +static void bit_hydra_setscl(void *data, int state) +{ + u32 val = pdregr(); + if (state) + val &= ~HYDRA_SCLK_OE; + else { + val &= ~HYDRA_SCLK; + val |= HYDRA_SCLK_OE; + } + pdregw(val); +} + +static void bit_hydra_setsda(void *data, int state) +{ + u32 val = pdregr(); + if (state) + val &= ~HYDRA_SDAT_OE; + else { + val &= ~HYDRA_SDAT; + val |= HYDRA_SDAT_OE; + } + pdregw(val); +} + +static int bit_hydra_getscl(void *data) +{ + return (pdregr() & HYDRA_SCLK) != 0; +} + +static int bit_hydra_getsda(void *data) +{ + return (pdregr() & HYDRA_SDAT) != 0; +} + +static void bit_hydra_inc(struct i2c_adapter *adap) +{ + MOD_INC_USE_COUNT; +} + +static void bit_hydra_dec(struct i2c_adapter *adap) +{ + MOD_DEC_USE_COUNT; +} + +/* ------------------------------------------------------------------------ */ + +static struct i2c_algo_bit_data bit_hydra_data = { + NULL, + bit_hydra_setsda, + bit_hydra_setscl, + bit_hydra_getsda, + bit_hydra_getscl, + 5, 5, 100, /*waits, timeout */ +}; + +static struct i2c_adapter bit_hydra_ops = { + "Hydra i2c", + I2C_HW_B_HYDRA, + NULL, + &bit_hydra_data, + bit_hydra_inc, + bit_hydra_dec, + NULL, + NULL, +}; + + +static int find_hydra(void) +{ + struct pci_dev *dev; + unsigned int base_addr; + + if (!pci_present()) + return -ENODEV; + + dev = pci_find_device(VENDOR, DEVICE, NULL); + if (!dev) { + printk("Hydra not found\n"); + return -ENODEV; + } + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,13) + base_addr = dev->resource[0].start; +#else + base_addr = dev->base_address[0]; +#endif + hydra_base = (unsigned long) ioremap(base_addr, 0x100); + + return 0; +} + +#ifdef MODULE +static +#else +extern +#endif +int __init i2c_hydra_init(void) +{ + if (find_hydra() < 0) { + printk("Error while reading PCI configuration\n"); + return -ENODEV; + } + + pdregw(0); /* clear SCLK_OE and SDAT_OE */ + + if (i2c_bit_add_bus(&bit_hydra_ops) == 0) { + printk("Hydra i2c: Module succesfully loaded\n"); + return 0; + } else { + iounmap((void *) hydra_base); + printk + ("Hydra i2c: Algo-bit error, couldn't register bus\n"); + return -ENODEV; + } +} + +EXPORT_NO_SYMBOLS; + +#ifdef MODULE +MODULE_AUTHOR("Geert Uytterhoeven "); +MODULE_DESCRIPTION("i2c for Apple Hydra Mac I/O"); + +int init_module(void) +{ + return i2c_hydra_init(); +} + +void cleanup_module(void) +{ + i2c_bit_del_bus(&bit_hydra_ops); + if (hydra_base) { + pdregw(0); /* clear SCLK_OE and SDAT_OE */ + iounmap((void *) hydra_base); + } +} +#endif