Greg, Sensors, Attached is a driver for the PCA9564 "Parallel to I2C" chip, it is similar in principle to the PCF8584 which is supported by the i2c-algo-pcf and i2c-elektor code, however it's not code compatible in any way: http://www.semiconductors.philips.com/pip/PCA9564PW.html The patch contains the PCA algorithm driver and a bus driver for an ISA card. It only supports master send and receive but I'm not sure that the Linux i2c stack supports client side operation anyhow, and I have no hardware to test on. It was tested on a PC104 card containing the PCA chip and an Atmel TPM device and also on a separate PC104 card with a DS1307 RTC hotwired onto it for testing purposes. The driver is against a 2.6 BK tree pulled on Friday. I also have a fairly trivial 2.4 backport if that is of interest. Ian. Index: linux-2.6-bk/drivers/i2c/algos/Kconfig =================================================================== --- linux-2.6-bk.orig/drivers/i2c/algos/Kconfig 2004-07-05 13:20:55.000000000 +0100 +++ linux-2.6-bk/drivers/i2c/algos/Kconfig 2004-07-29 16:06:29.000000000 +0100 @@ -27,6 +27,17 @@ This support is also available as a module. If so, the module will be called i2c-algo-pcf. +config I2C_ALGOPCA + tristate "I2C PCA 9564 interfaces" + depends on I2C + help + This allows you to use a range of I2C adapters called PCA adapters. + Say Y if you own an I2C adapter belonging to this class and then say + Y to the specific driver for you adapter below. + + This support is also available as a module. If so, the module + will be called i2c-algo-pca. + config I2C_ALGOITE tristate "ITE I2C Algorithm" depends on MIPS_ITE8172 && I2C Index: linux-2.6-bk/drivers/i2c/algos/Makefile =================================================================== --- linux-2.6-bk.orig/drivers/i2c/algos/Makefile 2004-06-16 10:54:09.000000000 +0100 +++ linux-2.6-bk/drivers/i2c/algos/Makefile 2004-07-29 16:06:29.000000000 +0100 @@ -4,6 +4,7 @@ obj-$(CONFIG_I2C_ALGOBIT) += i2c-algo-bit.o obj-$(CONFIG_I2C_ALGOPCF) += i2c-algo-pcf.o +obj-$(CONFIG_I2C_ALGOPCA) += i2c-algo-pca.o obj-$(CONFIG_I2C_ALGOITE) += i2c-algo-ite.o ifeq ($(CONFIG_I2C_DEBUG_ALGO),y) Index: linux-2.6-bk/drivers/i2c/algos/i2c-algo-pca.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6-bk/drivers/i2c/algos/i2c-algo-pca.c 2004-08-02 10:09:21.001222748 +0100 @@ -0,0 +1,395 @@ +/* + * i2c-algo-pca.c i2c driver algorithms for PCA9564 adapters + * Copyright (C) 2004 Arcom Control Systems + * + * 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 <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/i2c.h> +#include <linux/i2c-algo-pca.h> +#include "i2c-algo-pca.h" + +#define DRIVER "i2c-algo-pca" + +#define DEB1(fmt, args...) do { if (i2c_debug>=1) printk(fmt, ## args); } while(0) +#define DEB2(fmt, args...) do { if (i2c_debug>=2) printk(fmt, ## args); } while(0) +#define DEB3(fmt, args...) do { if (i2c_debug>=3) printk(fmt, ## args); } while(0) + +static int i2c_debug=0; + +#define pca_outw(adap, reg, val) adap->write_byte(adap, reg, val) +#define pca_inw(adap, reg) adap->read_byte(adap, reg) + +#define pca_status(adap) pca_inw(adap, I2C_PCA_STA) +#define pca_clock(adap) adap->get_clock(adap) +#define pca_own(adap) adap->get_own(adap) +#define pca_set_con(adap, val) pca_outw(adap, I2C_PCA_CON, val) +#define pca_get_con(adap) pca_inw(adap, I2C_PCA_CON) +#define pca_wait(adap) adap->wait_for_interrupt(adap) + +/* + * Generate a start condition on the i2c bus. + * + * returns after the start condition has occured + */ +static void pca_start(struct i2c_algo_pca_data *adap) +{ + int sta = pca_get_con(adap); + DEB2("=== START\n"); + sta |= I2C_PCA_CON_STA; + sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_SI); + pca_set_con(adap, sta); + pca_wait(adap); +} + +/* + * Generate a repeated start condition on the i2c bus + * + * return after the repeated start condition has occured + */ +static void pca_repeated_start(struct i2c_algo_pca_data *adap) +{ + int sta = pca_get_con(adap); + DEB2("=== REPEATED START\n"); + sta |= I2C_PCA_CON_STA; + sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_SI); + pca_set_con(adap, sta); + pca_wait(adap); +} + +/* + * Generate a stop condition on the i2c bus + * + * returns after the stop condition has been generated + * + * STOPs do not generate an interrupt or set the SI flag, since the + * part returns the the idle state (0xf8). Hence we don't need to + * pca_wait here. + */ +static void pca_stop(struct i2c_algo_pca_data *adap) +{ + int sta = pca_get_con(adap); + DEB2("=== STOP\n"); + sta |= I2C_PCA_CON_STO; + sta &= ~(I2C_PCA_CON_STA|I2C_PCA_CON_SI); + pca_set_con(adap, sta); +} + +/* + * Send the slave address and R/W bit + * + * returns after the address has been sent + */ +static void pca_address(struct i2c_algo_pca_data *adap, + struct i2c_msg *msg) +{ + int sta = pca_get_con(adap); + int addr; + + addr = ( (0x7f & msg->addr) << 1 ); + if (msg->flags & I2C_M_RD ) + addr |= 1; + DEB2("=== SLAVE ADDRESS %#04x+%c=%#04x\n", + msg->addr, msg->flags & I2C_M_RD ? 'R' : 'W', addr); + + pca_outw(adap, I2C_PCA_DAT, addr); + + sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_STA|I2C_PCA_CON_SI); + pca_set_con(adap, sta); + + pca_wait(adap); +} + +/* + * Transmit a byte. + * + * Returns after the byte has been transmitted + */ +static void pca_tx_byte(struct i2c_algo_pca_data *adap, + __u8 b) +{ + int sta = pca_get_con(adap); + DEB2("=== WRITE %#04x\n", b); + pca_outw(adap, I2C_PCA_DAT, b); + + sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_STA|I2C_PCA_CON_SI); + pca_set_con(adap, sta); + + pca_wait(adap); +} + +/* + * Receive a byte + * + * returns immediately. + */ +static void pca_rx_byte(struct i2c_algo_pca_data *adap, + __u8 *b, int ack) +{ + *b = pca_inw(adap, I2C_PCA_DAT); + DEB2("=== READ %#04x %s\n", *b, ack ? "ACK" : "NACK"); +} + +/* + * Setup ACK or NACK for next received byte and wait for it to arrive. + * + * Returns after next byte has arrived. + */ +static void pca_rx_ack(struct i2c_algo_pca_data *adap, + int ack) +{ + int sta = pca_get_con(adap); + + sta &= ~(I2C_PCA_CON_STO|I2C_PCA_CON_STA|I2C_PCA_CON_SI|I2C_PCA_CON_AA); + + if ( ack ) + sta |= I2C_PCA_CON_AA; + + pca_set_con(adap, sta); + pca_wait(adap); +} + +/* + * Reset the i2c bus / SIO + */ +static void pca_reset(struct i2c_algo_pca_data *adap) +{ + /* apparently only an external reset will do it. not a lot can be done */ + printk(KERN_ERR DRIVER ": Haven't figured out how to do a reset yet\n"); +} + +static int pca_xfer(struct i2c_adapter *i2c_adap, + struct i2c_msg msgs[], + int num) +{ + struct i2c_algo_pca_data *adap = i2c_adap->algo_data; + struct i2c_msg *msg = NULL; + int curmsg; + int numbytes = 0; + int state; + + state = pca_status(adap); + if ( state != 0xF8 ) { + printk(KERN_ERR DRIVER ": bus is not idle. status is %#04x\n", state ); + /* FIXME: what to do. Force stop ? */ + return -EREMOTEIO; + } + + DEB1("{{{ XFER %d messages\n", num); + + if (i2c_debug>=2) { + for (curmsg = 0; curmsg < num; curmsg++) { + int addr, i; + msg = &msgs[curmsg]; + + addr = (0x7f & msg->addr) ; + + if (msg->flags & I2C_M_RD ) + printk(KERN_INFO " [%02d] RD %d bytes from %#02x [%#02x, ...]\n", + curmsg, msg->len, addr, (addr<<1) | 1); + else { + printk(KERN_INFO " [%02d] WR %d bytes to %#02x [%#02x%s", + curmsg, msg->len, addr, addr<<1, + msg->len == 0 ? "" : ", "); + for(i=0; i < msg->len; i++) + printk("%#04x%s", msg->buf[i], i == msg->len - 1 ? "" : ", "); + printk("]\n"); + } + } + } + + curmsg = 0; + while (curmsg < num) { + state = pca_status(adap); + + DEB3("STATE is 0x%02x\n", state); + msg = &msgs[curmsg]; + + switch (state) { + case 0xf8: /* On reset or stop the bus is idle */ + pca_start(adap); + break; + + case 0x08: /* A START condition has been transmitted */ + case 0x10: /* A repeated start condition has been transmitted */ + pca_address(adap, msg); + break; + + case 0x18: /* SLA+W has been transmitted; ACK has been received */ + case 0x28: /* Data byte in I2CDAT has been transmitted; ACK has been received */ + if (numbytes < msg->len) { + pca_tx_byte(adap, msg->buf[numbytes]); + numbytes++; + break; + } + curmsg++; numbytes = 0; + if (curmsg == num) + pca_stop(adap); + else + pca_repeated_start(adap); + break; + + case 0x20: /* SLA+W has been transmitted; NOT ACK has been received */ + DEB2("NOT ACK recieved after SLA+W\n"); + pca_stop(adap); + return -EREMOTEIO; + + case 0x40: /* SLA+R has been transmitted; ACK has been received */ + pca_rx_ack(adap, msg->len > 1); + break; + + case 0x50: /* Data bytes has been received; ACK has been returned */ + if (numbytes < msg->len) { + pca_rx_byte(adap, &msg->buf[numbytes], 1); + numbytes++; + pca_rx_ack(adap, numbytes < msg->len - 1); + break; + } + curmsg++; numbytes = 0; + if (curmsg == num) + pca_stop(adap); + else + pca_repeated_start(adap); + break; + + case 0x48: /* SLA+R has been transmitted; NOT ACK has been received */ + DEB2("NOT ACK received after SLA+R\n"); + pca_stop(adap); + return -EREMOTEIO; + + case 0x30: /* Data byte in I2CDAT has been transmitted; NOT ACK has been received */ + DEB2("NOT ACK recieved after data byte\n"); + return -EREMOTEIO; + + case 0x38: /* Arbitration lost during SLA+W, SLA+R or data bytes */ + DEB2("Arbitration lost\n"); + return -EREMOTEIO; + + case 0x58: /* Data byte has been received; NOT ACK has been returned */ + if ( numbytes == msg->len - 1 ) { + pca_rx_byte(adap, &msg->buf[numbytes], 0); + curmsg++; numbytes = 0; + if (curmsg == num) + pca_stop(adap); + else + pca_repeated_start(adap); + } else { + DEB2("NOT ACK sent after data byte received. " + "Not final byte. numbytes %d. len %d\n", + numbytes, msg->len); + pca_stop(adap); + return -EREMOTEIO; + } + break; + case 0x70: /* Bus error - SDA stuck low */ + DEB2("BUS ERROR - SDA Stuck low\n"); + pca_reset(adap); + return -EREMOTEIO; + case 0x90: /* Bus error - SCL stuck low */ + DEB2("BUS ERROR - SCL Stuck low\n"); + pca_reset(adap); + return -EREMOTEIO; + case 0x00: /* Bus error during master or slave mode due to illegal START or STOP condition */ + DEB2("BUS ERROR - Illegal START or STOP\n"); + pca_reset(adap); + return -EREMOTEIO; + default: + printk(KERN_ERR DRIVER ": unhandled SIO state 0x%02x\n", state); + break; + } + + } + + DEB1(KERN_CRIT "}}} transfered %d messages. " + "status is %#04x. control is %#04x\n", + num, pca_status(adap), + pca_get_con(adap)); + return curmsg; +} + +static u32 pca_func(struct i2c_adapter *adap) +{ + return I2C_FUNC_SMBUS_EMUL; +} + +static int pca_init(struct i2c_algo_pca_data *adap) +{ + static int freqs[] = {330,288,217,146,88,59,44,36}; + int own, clock; + + own = pca_own(adap); + clock = pca_clock(adap); + DEB1(KERN_INFO DRIVER ": own address is %#04x\n", own); + DEB1(KERN_INFO DRIVER ": clock freqeuncy is %dkHz\n", freqs[clock]); + + pca_outw(adap, I2C_PCA_ADR, own << 1); + + pca_set_con(adap, I2C_PCA_CON_ENSIO | clock); + udelay(500); /* 500 ?s for oscilator to stabilise */ + + return 0; +} + +static struct i2c_algorithm pca_algo = { + .name = "PCA9564 algorithm", + .id = I2C_ALGO_PCA, + .master_xfer = pca_xfer, + .functionality = pca_func, +}; + +/* + * registering functions to load algorithms at runtime + */ +int i2c_pca_add_bus(struct i2c_adapter *adap) +{ + struct i2c_algo_pca_data *pca_adap = adap->algo_data; + int rval; + + /* register new adapter to i2c module... */ + + adap->id |= pca_algo.id; + adap->algo = &pca_algo; + + adap->timeout = 100; /* default values, should */ + adap->retries = 3; /* be replaced by defines */ + + rval = pca_init(pca_adap); + + if (!rval) + i2c_add_adapter(adap); + + return rval; +} + +int i2c_pca_del_bus(struct i2c_adapter *adap) +{ + return i2c_del_adapter(adap); +} + +EXPORT_SYMBOL(i2c_pca_add_bus); +EXPORT_SYMBOL(i2c_pca_del_bus); + +MODULE_AUTHOR("Ian Campbell <icampbell at arcom.com>"); +MODULE_DESCRIPTION("I2C-Bus PCA9564 algorithm"); +MODULE_LICENSE("GPL"); + +module_param(i2c_debug, int, 0); Index: linux-2.6-bk/drivers/i2c/algos/i2c-algo-pca.h =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6-bk/drivers/i2c/algos/i2c-algo-pca.h 2004-07-29 16:06:29.000000000 +0100 @@ -0,0 +1,26 @@ +#ifndef I2C_PCA9564_H +#define I2C_PCA9564_H 1 + +#define I2C_PCA_STA 0x00 /* STATUS Read Only */ +#define I2C_PCA_TO 0x00 /* TIMEOUT Write Only */ +#define I2C_PCA_DAT 0x01 /* DATA Read/Write */ +#define I2C_PCA_ADR 0x02 /* OWN ADR Read/Write */ +#define I2C_PCA_CON 0x03 /* CONTROL Read/Write */ + +#define I2C_PCA_CON_AA 0x80 /* Assert Acknowledge */ +#define I2C_PCA_CON_ENSIO 0x40 /* Enable */ +#define I2C_PCA_CON_STA 0x20 /* Start */ +#define I2C_PCA_CON_STO 0x10 /* Stop */ +#define I2C_PCA_CON_SI 0x08 /* Serial Interrupt */ +#define I2C_PCA_CON_CR 0x07 /* Clock Rate (MASK) */ + +#define I2C_PCA_CON_330kHz 0x00 +#define I2C_PCA_CON_288kHz 0x01 +#define I2C_PCA_CON_217kHz 0x02 +#define I2C_PCA_CON_146kHz 0x03 +#define I2C_PCA_CON_88kHz 0x04 +#define I2C_PCA_CON_59kHz 0x05 +#define I2C_PCA_CON_44kHz 0x06 +#define I2C_PCA_CON_36kHz 0x07 + +#endif /* I2C_PCA9564_H */ Index: linux-2.6-bk/drivers/i2c/busses/Kconfig =================================================================== --- linux-2.6-bk.orig/drivers/i2c/busses/Kconfig 2004-06-16 10:54:09.000000000 +0100 +++ linux-2.6-bk/drivers/i2c/busses/Kconfig 2004-07-29 16:06:29.000000000 +0100 @@ -396,4 +396,15 @@ This driver can also be built as a module. If so, the module will be called i2c-voodoo3. +config I2C_PCA_ISA + tristate "PCA9564 on an ISA bus" + depends on I2C + select I2C_ALGOPCA + help + This driver supports ISA boards using the Philips PCA 9564 + Parallel bus to I2C bus controller + + This driver can also be built as a module. If so, the module + will be called i2c-pca-isa. + endmenu Index: linux-2.6-bk/drivers/i2c/busses/Makefile =================================================================== --- linux-2.6-bk.orig/drivers/i2c/busses/Makefile 2004-06-16 10:54:09.000000000 +0100 +++ linux-2.6-bk/drivers/i2c/busses/Makefile 2004-07-29 16:06:29.000000000 +0100 @@ -20,6 +20,7 @@ obj-$(CONFIG_I2C_NFORCE2) += i2c-nforce2.o obj-$(CONFIG_I2C_PARPORT) += i2c-parport.o obj-$(CONFIG_I2C_PARPORT_LIGHT) += i2c-parport-light.o +obj-$(CONFIG_I2C_PCA_ISA) += i2c-pca-isa.o obj-$(CONFIG_I2C_PIIX4) += i2c-piix4.o obj-$(CONFIG_I2C_PROSAVAGE) += i2c-prosavage.o obj-$(CONFIG_I2C_RPXLITE) += i2c-rpx.o Index: linux-2.6-bk/drivers/i2c/busses/i2c-pca-isa.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6-bk/drivers/i2c/busses/i2c-pca-isa.c 2004-08-02 10:09:21.073203249 +0100 @@ -0,0 +1,184 @@ +/* + * i2c-pca-isa.c driver for PCA9564 on ISA boards + * Copyright (C) 2004 Arcom Control Systems + * + * 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 <linux/config.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/wait.h> + +#include <linux/i2c.h> +#include <linux/i2c-algo-pca.h> + +#include <asm/io.h> +#include <asm/irq.h> + +#include "../algos/i2c-algo-pca.h" + +#define IO_SIZE 4 + +#undef DEBUG_IO +//#define DEBUG_IO + +static unsigned long base = 0x330; +static int irq = 10; + +/* Data sheet recommends 59kHz for 100kHz operation due to variation + * in the actual clock rate */ +static int clock = I2C_PCA_CON_59kHz; + +static int own = 0x55; + +static wait_queue_head_t pca_wait; + +static int pca_isa_getown(struct i2c_algo_pca_data *adap) +{ + return (own); +} + +static int pca_isa_getclock(struct i2c_algo_pca_data *adap) +{ + return (clock); +} + +static void +pca_isa_writebyte(struct i2c_algo_pca_data *adap, int reg, int val) +{ +#ifdef DEBUG_IO + static char *names[] = { "T/O", "DAT", "ADR", "CON" }; + printk("*** write %s at %#lx <= %#04x\n", names[reg], base+reg, val); +#endif + outb(val, base+reg); +} + +static int +pca_isa_readbyte(struct i2c_algo_pca_data *adap, int reg) +{ + int res = inb(base+reg); +#ifdef DEBUG_IO + { + static char *names[] = { "STA", "DAT", "ADR", "CON" }; + printk("*** read %s => %#04x\n", names[reg], res); + } +#endif + return res; +} + +static int pca_isa_waitforinterrupt(struct i2c_algo_pca_data *adap) +{ + int ret = 0; + + if (irq > -1) { + ret = wait_event_interruptible(pca_wait, + pca_isa_readbyte(adap, I2C_PCA_CON) & I2C_PCA_CON_SI); + } else { + while ((pca_isa_readbyte(adap, I2C_PCA_CON) & I2C_PCA_CON_SI) == 0) + udelay(100); + } + return ret; +} + +static irqreturn_t pca_handler(int this_irq, void *dev_id, struct pt_regs *regs) { + wake_up_interruptible(&pca_wait); + return IRQ_HANDLED; +} + +static struct i2c_algo_pca_data pca_isa_data = { + .get_own = pca_isa_getown, + .get_clock = pca_isa_getclock, + .write_byte = pca_isa_writebyte, + .read_byte = pca_isa_readbyte, + .wait_for_interrupt = pca_isa_waitforinterrupt, +}; + +static struct i2c_adapter pca_isa_ops = { + .owner = THIS_MODULE, + .id = I2C_HW_A_ISA, + .algo_data = &pca_isa_data, + .name = "PCA9564 ISA Adapter", +}; + +static int __init pca_isa_init(void) +{ + + init_waitqueue_head(&pca_wait); + + printk(KERN_INFO "i2c-pca-isa: i/o base %#08lx. irq %d\n", base, irq); + + if (!request_region(base, IO_SIZE, "i2c-pca-isa")) { + printk(KERN_ERR "i2c-pca-isa: I/O address %#08lx is in use.\n", base); + goto out; + } + + if (irq > -1) { + if (request_irq(irq, pca_handler, 0, "i2c-pca-isa", &pca_isa_ops) < 0) { + printk(KERN_ERR "i2c-pca-isa: Request irq%d failed\n", irq); + goto out_region; + } + } + + if (i2c_pca_add_bus(&pca_isa_ops) < 0) { + printk(KERN_ERR "i2c-pca-isa: Failed to add i2c bus\n"); + goto out_irq; + } + + return 0; + + out_irq: + if (irq > -1) + free_irq(irq, &pca_isa_ops); + out_region: + release_region(base, IO_SIZE); + out: + return -ENODEV; +} + +static void pca_isa_exit(void) +{ + i2c_pca_del_bus(&pca_isa_ops); + + if (irq > 0) { + disable_irq(irq); + free_irq(irq, &pca_isa_ops); + } + release_region(base, IO_SIZE); +} + +MODULE_AUTHOR("Ian Campbell <icampbell at arcom.com>"); +MODULE_DESCRIPTION("ISA base PCA9564 driver"); +MODULE_LICENSE("GPL"); + +module_param(base, ulong, 0); +MODULE_PARM_DESC(base, "I/O base address"); + +module_param(irq, int, 0); +MODULE_PARM_DESC(irq, "IRQ"); +module_param(clock, int, 0); +MODULE_PARM_DESC(clock, "Clock rate as described in table 1 of PCA9564 datasheet"); + +module_param(own, int, 0); /* the driver can't do slave mode, so there's no real point in this */ + +module_init(pca_isa_init); +module_exit(pca_isa_exit); Index: linux-2.6-bk/include/linux/i2c-algo-pca.h =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6-bk/include/linux/i2c-algo-pca.h 2004-07-29 16:06:29.000000000 +0100 @@ -0,0 +1,17 @@ +#ifndef _LINUX_I2C_ALGO_PCA_H +#define _LINUX_I2C_ALGO_PCA_H + +struct i2c_algo_pca_data { + int (*get_own) (struct i2c_algo_pca_data *adap); /* Obtain own address */ + int (*get_clock) (struct i2c_algo_pca_data *adap); + void (*write_byte) (struct i2c_algo_pca_data *adap, int reg, int val); + int (*read_byte) (struct i2c_algo_pca_data *adap, int reg); + int (*wait_for_interrupt) (struct i2c_algo_pca_data *adap); +}; + +#define I2C_PCA_ADAP_MAX 16 + +int i2c_pca_add_bus(struct i2c_adapter *); +int i2c_pca_del_bus(struct i2c_adapter *); + +#endif /* _LINUX_I2C_ALGO_PCA_H */ Index: linux-2.6-bk/include/linux/i2c-id.h =================================================================== --- linux-2.6-bk.orig/include/linux/i2c-id.h 2004-06-23 15:48:42.000000000 +0100 +++ linux-2.6-bk/include/linux/i2c-id.h 2004-07-29 16:06:29.000000000 +0100 @@ -194,6 +194,7 @@ #define I2C_ALGO_OCP 0x120000 /* IBM or otherwise On-chip I2C algorithm */ #define I2C_ALGO_BITHS 0x130000 /* enhanced bit style adapters */ #define I2C_ALGO_OCP_IOP3XX 0x140000 /* XSCALE IOP3XX On-chip I2C alg */ +#define I2C_ALGO_PCA 0x150000 /* PCA 9564 style adapters */ #define I2C_ALGO_EXP 0x800000 /* experimental */ @@ -239,6 +240,9 @@ #define I2C_HW_P_ISA 0x01 /* generic ISA Bus inteface card */ #define I2C_HW_P_ELEK 0x02 /* Elektor ISA Bus inteface card */ +/* --- PCA 9564 based algorithms */ +#define I2C_HW_A_ISA 0x00 /* generic ISA Bus interface card */ + /* --- ACPI Embedded controller algorithms */ #define I2C_HW_ACPI_EC 0x00 -- Ian Campbell, Senior Design Engineer Web: http://www.arcom.com Arcom, Clifton Road, Direct: +44 (0)1223 403 465 Cambridge CB1 7EA, United Kingdom Phone: +44 (0)1223 411 200
