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Subject[patch 4c/5] 2.4.20-pre5 i2c updates (fwd)
patch 4/5 was too large so its now split into 4a, 4b and 4c.

--
ac9410@attbi.com

---------- Forwarded message ----------
Date: Thu, 29 Aug 2002 01:37:52 -0400 (EDT)
From: Albert Cranford <ac9410@attbi.com>
To: Marcelo Tosatti <marcelo@conectiva.com.br>
Cc: Kernel mailing list <linux-kernel@vger.kernel.org>
Subject: [patch 4/5] 2.4.20-pre5 i2c updates

Hello Marcelo,
Attached are i2c patches that bring the kernel to the latest released and tested
version. Updates include:
o Support for SMBus 2.0 PEC Packet Error Checking
o New algorithm-i2c-algo-8xxx for MPC8XXX
o New algorithm-i2c-algo-ibm_ocp for IBM PPC 405
o New adapter-i2c-adap-ibm_ocp for IBM PPC 405
o New adapter-i2c-frodo for SA 1110 board
o New adapter-i2c-pcf-epp for PCF8584
o New adapter-i2c-pport for parallel port
o New adapter-i2c-rpx for embeded MPC8XX
o Updated documentation
Thanks,
Albert
--
ac9410@attbi.com
--- /dev/null 1994-07-17 19:46:18.000000000 -0400
+++ linux/drivers/i2c/i2c-algo-ibm_ocp.h 2002-07-23 01:45:46.000000000 -0400
@@ -0,0 +1,55 @@
+/* ------------------------------------------------------------------------- */
+/* i2c-algo-ibm_ocp.h i2c driver algorithms for IBM PPC 405 IIC adapters */
+/* ------------------------------------------------------------------------- */
+/* Copyright (C) 1995-97 Simon G. Vogl
+ 1998-99 Hans Berglund
+
+ 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. */
+/* ------------------------------------------------------------------------- */
+
+/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
+ Frodo Looijaard <frodol@dds.nl> */
+
+/* Modifications by MontaVista Software, August 2000
+ Changes made to support the IIC peripheral on the IBM PPC 405 */
+
+#ifndef I2C_ALGO_IIC_H
+#define I2C_ALGO_IIC_H 1
+
+/* --- Defines for pcf-adapters --------------------------------------- */
+#include <linux/i2c.h>
+
+struct i2c_algo_iic_data {
+ struct iic_regs *data; /* private data for lolevel routines */
+ void (*setiic) (void *data, int ctl, int val);
+ int (*getiic) (void *data, int ctl);
+ int (*getown) (void *data);
+ int (*getclock) (void *data);
+ void (*waitforpin) (void *data);
+
+ /* local settings */
+ int udelay;
+ int mdelay;
+ int timeout;
+};
+
+
+#define I2C_IIC_ADAP_MAX 16
+
+
+int i2c_iic_add_bus(struct i2c_adapter *);
+int i2c_iic_del_bus(struct i2c_adapter *);
+
+#endif /* I2C_ALGO_IIC_H */
--- /dev/null 1994-07-17 19:46:18.000000000 -0400
+++ linux/drivers/i2c/i2c-frodo.c 2002-07-23 01:51:04.000000000 -0400
@@ -0,0 +1,116 @@
+
+/*
+ * linux/drivers/i2c/i2c-frodo.c
+ *
+ * Author: Abraham van der Merwe <abraham@2d3d.co.za>
+ *
+ * An I2C adapter driver for the 2d3D, Inc. StrongARM SA-1110
+ * Development board (Frodo).
+ *
+ * This source code is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/version.h>
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include <asm/hardware.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
+
+static void frodo_setsda (void *data,int state)
+{
+ if (state)
+ FRODO_CPLD_I2C |= FRODO_I2C_SDA_OUT;
+ else
+ FRODO_CPLD_I2C &= ~FRODO_I2C_SDA_OUT;
+}
+
+static void frodo_setscl (void *data,int state)
+{
+ if (state)
+ FRODO_CPLD_I2C |= FRODO_I2C_SCL_OUT;
+ else
+ FRODO_CPLD_I2C &= ~FRODO_I2C_SCL_OUT;
+}
+
+static int frodo_getsda (void *data)
+{
+ return ((FRODO_CPLD_I2C & FRODO_I2C_SDA_IN) != 0);
+}
+
+static int frodo_getscl (void *data)
+{
+ return ((FRODO_CPLD_I2C & FRODO_I2C_SCL_IN) != 0);
+}
+
+static struct i2c_algo_bit_data bit_frodo_data = {
+ setsda: frodo_setsda,
+ setscl: frodo_setscl,
+ getsda: frodo_getsda,
+ getscl: frodo_getscl,
+ udelay: 80,
+ mdelay: 80,
+ timeout: 100
+};
+
+static int frodo_client_register (struct i2c_client *client)
+{
+ return (0);
+}
+
+static int frodo_client_unregister (struct i2c_client *client)
+{
+ return (0);
+}
+
+static void frodo_inc_use (struct i2c_adapter *adapter)
+{
+ MOD_INC_USE_COUNT;
+}
+
+static void frodo_dec_use (struct i2c_adapter *adapter)
+{
+ MOD_DEC_USE_COUNT;
+}
+
+static struct i2c_adapter frodo_ops = {
+ name: "Frodo adapter driver",
+ id: I2C_HW_B_FRODO,
+ algo: NULL,
+ algo_data: &bit_frodo_data,
+ inc_use: frodo_inc_use,
+ dec_use: frodo_dec_use,
+ client_register: frodo_client_register,
+ client_unregister: frodo_client_unregister
+};
+
+static int __init i2c_frodo_init (void)
+{
+ return (i2c_bit_add_bus (&frodo_ops));
+}
+
+EXPORT_NO_SYMBOLS;
+
+static void __exit i2c_frodo_exit (void)
+{
+ i2c_bit_del_bus (&frodo_ops);
+}
+
+MODULE_AUTHOR ("Abraham van der Merwe <abraham@2d3d.co.za>");
+MODULE_DESCRIPTION ("I2C-Bus adapter routines for Frodo");
+
+MODULE_LICENSE ("GPL");
+
+EXPORT_NO_SYMBOLS;
+
+module_init (i2c_frodo_init);
+module_exit (i2c_frodo_exit);
+
--- /dev/null 1994-07-17 19:46:18.000000000 -0400
+++ linux/drivers/i2c/i2c-pcf-epp.c 2002-07-23 09:09:06.000000000 -0400
@@ -0,0 +1,310 @@
+/* ------------------------------------------------------------------------- */
+/* i2c-pcf-epp.c i2c-hw access for PCF8584 style EPP parallel port adapters */
+/* ------------------------------------------------------------------------- */
+
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/parport.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-algo-pcf.h>
+#include "i2c-pcf8584.h"
+
+struct i2c_pcf_epp {
+ int pe_base;
+ int pe_irq;
+ int pe_clock;
+ int pe_own;
+} ;
+
+#define DEFAULT_BASE 0x378
+#define DEFAULT_IRQ 7
+#define DEFAULT_CLOCK 0x1c
+#define DEFAULT_OWN 0x55
+
+static int base = 0;
+static int irq = 0;
+static int clock = 0;
+static int own = 0;
+static int i2c_debug=0;
+static struct i2c_pcf_epp gpe;
+static wait_queue_head_t pcf_wait;
+static int pcf_pending;
+ spinlock_t irq_driver_lock = SPIN_LOCK_UNLOCKED;
+
+/* ----- global defines ----------------------------------------------- */
+#define DEB(x) if (i2c_debug>=1) x
+#define DEB2(x) if (i2c_debug>=2) x
+#define DEB3(x) if (i2c_debug>=3) x
+#define DEBE(x) x /* error messages */
+
+/* --- Convenience defines for the EPP/SPP port: */
+#define BASE ((struct i2c_pcf_epp *)(data))->pe_base
+// #define DATA BASE /* SPP data port */
+#define STAT (BASE+1) /* SPP status port */
+#define CTRL (BASE+2) /* SPP control port */
+#define EADD (BASE+3) /* EPP address port */
+#define EDAT (BASE+4) /* EPP data port */
+
+/* ----- local functions ---------------------------------------------- */
+
+static void pcf_epp_setbyte(void *data, int ctl, int val)
+{
+ if (ctl) {
+ if (gpe.pe_irq > 0) {
+ DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: Write control 0x%x\n",
+ val|I2C_PCF_ENI));
+ // set A0 pin HIGH
+ outb(inb(CTRL) | PARPORT_CONTROL_INIT, CTRL);
+ // DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: CTRL port = 0x%x\n", inb(CTRL)));
+ // DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: STAT port = 0x%x\n", inb(STAT)));
+
+ // EPP write data cycle
+ outb(val | I2C_PCF_ENI, EDAT);
+ } else {
+ DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: Write control 0x%x\n", val));
+ // set A0 pin HIGH
+ outb(inb(CTRL) | PARPORT_CONTROL_INIT, CTRL);
+ outb(val, CTRL);
+ }
+ } else {
+ DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: Write data 0x%x\n", val));
+ // set A0 pin LO
+ outb(inb(CTRL) & ~PARPORT_CONTROL_INIT, CTRL);
+ // DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: CTRL port = 0x%x\n", inb(CTRL)));
+ // DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: STAT port = 0x%x\n", inb(STAT)));
+ outb(val, EDAT);
+ }
+}
+
+static int pcf_epp_getbyte(void *data, int ctl)
+{
+ int val;
+
+ if (ctl) {
+ // set A0 pin HIGH
+ outb(inb(CTRL) | PARPORT_CONTROL_INIT, CTRL);
+ val = inb(EDAT);
+ DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: Read control 0x%x\n", val));
+ } else {
+ // set A0 pin LOW
+ outb(inb(CTRL) & ~PARPORT_CONTROL_INIT, CTRL);
+ val = inb(EDAT);
+ DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: Read data 0x%x\n", val));
+ }
+ return (val);
+}
+
+static int pcf_epp_getown(void *data)
+{
+ return (gpe.pe_own);
+}
+
+
+static int pcf_epp_getclock(void *data)
+{
+ return (gpe.pe_clock);
+}
+
+#if 0
+static void pcf_epp_sleep(unsigned long timeout)
+{
+ schedule_timeout( timeout * HZ);
+}
+#endif
+
+static void pcf_epp_waitforpin(void) {
+ int timeout = 10;
+
+ if (gpe.pe_irq > 0) {
+ spin_lock_irq(&irq_driver_lock);
+ if (pcf_pending == 0) {
+ interruptible_sleep_on_timeout(&pcf_wait, timeout*HZ);
+ //udelay(100);
+ } else {
+ pcf_pending = 0;
+ }
+ spin_unlock_irq(&irq_driver_lock);
+ } else {
+ udelay(100);
+ }
+}
+
+static void pcf_epp_handler(int this_irq, void *dev_id, struct pt_regs *regs) {
+ pcf_pending = 1;
+ wake_up_interruptible(&pcf_wait);
+ DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: in interrupt handler.\n"));
+}
+
+
+static int pcf_epp_init(void *data)
+{
+ if (check_region(gpe.pe_base, 5) < 0 ) {
+
+ printk(KERN_WARNING "Could not request port region with base 0x%x\n", gpe.pe_base);
+ return -ENODEV;
+ } else {
+ request_region(gpe.pe_base, 5, "i2c (EPP parallel port adapter)");
+ }
+
+ DEB3(printk(KERN_DEBUG "i2c-pcf-epp.o: init status port = 0x%x\n", inb(0x379)));
+
+ if (gpe.pe_irq > 0) {
+ if (request_irq(gpe.pe_irq, pcf_epp_handler, 0, "PCF8584", 0) < 0) {
+ printk(KERN_NOTICE "i2c-pcf-epp.o: Request irq%d failed\n", gpe.pe_irq);
+ gpe.pe_irq = 0;
+ } else
+ disable_irq(gpe.pe_irq);
+ enable_irq(gpe.pe_irq);
+ }
+ // EPP mode initialize
+ // enable interrupt from nINTR pin
+ outb(inb(CTRL)|0x14, CTRL);
+ // clear ERROR bit of STAT
+ outb(inb(STAT)|0x01, STAT);
+ outb(inb(STAT)&~0x01,STAT);
+
+ return 0;
+}
+
+
+static void __exit pcf_epp_exit(void)
+{
+ if (gpe.pe_irq > 0) {
+ disable_irq(gpe.pe_irq);
+ free_irq(gpe.pe_irq, 0);
+ }
+ release_region(gpe.pe_base , 5);
+}
+
+
+static int pcf_epp_reg(struct i2c_client *client)
+{
+ return 0;
+}
+
+
+static int pcf_epp_unreg(struct i2c_client *client)
+{
+ return 0;
+}
+
+static void pcf_epp_inc_use(struct i2c_adapter *adap)
+{
+#ifdef MODULE
+ MOD_INC_USE_COUNT;
+#endif
+}
+
+static void pcf_epp_dec_use(struct i2c_adapter *adap)
+{
+#ifdef MODULE
+ MOD_DEC_USE_COUNT;
+#endif
+}
+
+
+/* ------------------------------------------------------------------------
+ * Encapsulate the above functions in the correct operations structure.
+ * This is only done when more than one hardware adapter is supported.
+ */
+static struct i2c_algo_pcf_data pcf_epp_data = {
+ NULL,
+ pcf_epp_setbyte,
+ pcf_epp_getbyte,
+ pcf_epp_getown,
+ pcf_epp_getclock,
+ pcf_epp_waitforpin,
+ 80, 80, 100, /* waits, timeout */
+};
+
+static struct i2c_adapter pcf_epp_ops = {
+ "PCF8584 EPP adapter",
+ I2C_HW_P_LP,
+ NULL,
+ &pcf_epp_data,
+ pcf_epp_inc_use,
+ pcf_epp_dec_use,
+ pcf_epp_reg,
+ pcf_epp_unreg,
+};
+
+int __init i2c_pcfepp_init(void)
+{
+ struct i2c_pcf_epp *pepp = &gpe;
+
+ printk(KERN_DEBUG "i2c-pcf-epp.o: i2c pcf8584-epp adapter module version %s (%s)\n", I2C_VERSION, I2C_DATE);
+ if (base == 0)
+ pepp->pe_base = DEFAULT_BASE;
+ else
+ pepp->pe_base = base;
+
+ if (irq == 0)
+ pepp->pe_irq = DEFAULT_IRQ;
+ else if (irq<0) {
+ // switch off irq
+ pepp->pe_irq=0;
+ } else {
+ pepp->pe_irq = irq;
+ }
+ if (clock == 0)
+ pepp->pe_clock = DEFAULT_CLOCK;
+ else
+ pepp->pe_clock = clock;
+
+ if (own == 0)
+ pepp->pe_own = DEFAULT_OWN;
+ else
+ pepp->pe_own = own;
+
+ pcf_epp_data.data = (void *)pepp;
+ init_waitqueue_head(&pcf_wait);
+ if (pcf_epp_init(pepp) == 0) {
+ int ret;
+ if ( (ret = i2c_pcf_add_bus(&pcf_epp_ops)) < 0) {
+ printk(KERN_WARNING "i2c_pcf_add_bus caused an error: %d\n",ret);
+ release_region(pepp->pe_base , 5);
+ return ret;
+ }
+ } else {
+
+ return -ENODEV;
+ }
+ printk(KERN_DEBUG "i2c-pcf-epp.o: found device at %#x.\n", pepp->pe_base);
+ return 0;
+}
+
+
+EXPORT_NO_SYMBOLS;
+
+#ifdef MODULE
+MODULE_AUTHOR("Hans Berglund <hb@spacetec.no> \n modified by Ryosuke Tajima <rosk@jsk.t.u-tokyo.ac.jp>");
+MODULE_DESCRIPTION("I2C-Bus adapter routines for PCF8584 EPP parallel port adapter");
+
+MODULE_PARM(base, "i");
+MODULE_PARM(irq, "i");
+MODULE_PARM(clock, "i");
+MODULE_PARM(own, "i");
+MODULE_PARM(i2c_debug, "i");
+
+int init_module(void)
+{
+ return i2c_pcfepp_init();
+}
+
+void cleanup_module(void)
+{
+ i2c_pcf_del_bus(&pcf_epp_ops);
+ pcf_epp_exit();
+}
+
+#endif
+
+
--- /dev/null 1994-07-17 19:46:18.000000000 -0400
+++ linux/drivers/i2c/i2c-pport.c 2002-07-23 09:12:21.000000000 -0400
@@ -0,0 +1,252 @@
+/* ------------------------------------------------------------------------- */
+/* i2c-pport.c i2c-hw access for primitive i2c par. port adapter */
+/* ------------------------------------------------------------------------- */
+/* Copyright (C) 2001 Daniel Smolik
+
+ 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. */
+/* ------------------------------------------------------------------------- */
+
+/*
+ See doc/i2c-pport for instructions on wiring to the
+ parallel port connector.
+
+ Cut & paste :-) based on Velleman K9000 driver by Simon G. Vogl
+*/
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <linux/ioport.h>
+#include <asm/io.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
+
+MODULE_LICENSE("GPL");
+
+#define DEFAULT_BASE 0x378
+static int base=0;
+static unsigned char PortData = 0;
+
+/* ----- global defines ----------------------------------------------- */
+#define DEB(x) /* should be reasonable open, close &c. */
+#define DEB2(x) /* low level debugging - very slow */
+#define DEBE(x) x /* error messages */
+#define DEBINIT(x) x /* detection status messages */
+
+/* --- Convenience defines for the parallel port: */
+#define BASE (unsigned int)(data)
+#define DATA BASE /* Centronics data port */
+#define STAT (BASE+1) /* Centronics status port */
+#define CTRL (BASE+2) /* Centronics control port */
+
+/* we will use SDA - Auto Linefeed(14) bit 1 POUT */
+/* we will use SCL - Initialize printer(16) BUSY bit 2*/
+
+#define SET_SCL | 0x04
+#define CLR_SCL & 0xFB
+
+
+
+
+#define SET_SDA & 0x04
+#define CLR_SDA | 0x02
+
+
+/* ----- local functions ---------------------------------------------- */
+
+
+static void bit_pport_setscl(void *data, int state)
+{
+ if (state) {
+ //high
+ PortData = PortData SET_SCL;
+ } else {
+ //low
+ PortData = PortData CLR_SCL;
+ }
+ outb(PortData, CTRL);
+}
+
+static void bit_pport_setsda(void *data, int state)
+{
+ if (state) {
+
+ PortData = PortData SET_SDA;
+ } else {
+
+ PortData = PortData CLR_SDA;
+ }
+ outb(PortData, CTRL);
+}
+
+static int bit_pport_getscl(void *data)
+{
+
+ return ( 4 == ( (inb_p(CTRL)) & 0x04 ) );
+}
+
+static int bit_pport_getsda(void *data)
+{
+ return ( 0 == ( (inb_p(CTRL)) & 0x02 ) );
+}
+
+static int bit_pport_init(void)
+{
+ //release_region( (base+2) ,1);
+
+ if (check_region((base+2),1) < 0 ) {
+ return -ENODEV;
+ } else {
+
+ /* test for PPORT adap. */
+
+
+ PortData=inb(base+2);
+ PortData= (PortData SET_SDA) SET_SCL;
+ outb(PortData,base+2);
+
+ if (!(inb(base+2) | 0x06)) { /* SDA and SCL will be high */
+ DEBINIT(printk("i2c-pport.o: SDA and SCL was low.\n"));
+ return -ENODEV;
+ } else {
+
+ /*SCL high and SDA low*/
+ PortData = PortData SET_SCL CLR_SDA;
+ outb(PortData,base+2);
+ udelay(400);
+ if ( !(inb(base+2) | 0x4) ) {
+ //outb(0x04,base+2);
+ DEBINIT(printk("i2c-port.o: SDA was high.\n"));
+ return -ENODEV;
+ }
+ }
+ request_region((base+2),1,
+ "i2c (PPORT adapter)");
+ bit_pport_setsda((void*)base,1);
+ bit_pport_setscl((void*)base,1);
+ }
+ return 0;
+}
+
+static void __exit bit_pport_exit(void)
+{
+ release_region((base+2),1);
+}
+
+static int bit_pport_reg(struct i2c_client *client)
+{
+ return 0;
+}
+
+static int bit_pport_unreg(struct i2c_client *client)
+{
+ release_region((base+2),1);
+ return 0;
+}
+
+static void bit_pport_inc_use(struct i2c_adapter *adap)
+{
+#ifdef MODULE
+ MOD_INC_USE_COUNT;
+#endif
+}
+
+static void bit_pport_dec_use(struct i2c_adapter *adap)
+{
+#ifdef MODULE
+ MOD_DEC_USE_COUNT;
+#endif
+}
+
+/* ------------------------------------------------------------------------
+ * Encapsulate the above functions in the correct operations structure.
+ * This is only done when more than one hardware adapter is supported.
+ */
+static struct i2c_algo_bit_data bit_pport_data = {
+ NULL,
+ bit_pport_setsda,
+ bit_pport_setscl,
+ bit_pport_getsda,
+ bit_pport_getscl,
+ //NULL,
+ 40, 80, 100, /* waits, timeout */
+};
+
+static struct i2c_adapter bit_pport_ops = {
+ "Primitive Parallel port adaptor",
+ I2C_HW_B_PPORT,
+ NULL,
+ &bit_pport_data,
+ bit_pport_inc_use,
+ bit_pport_dec_use,
+ bit_pport_reg,
+ bit_pport_unreg,
+};
+
+static int __init i2c_bitpport_init(void)
+{
+ printk("i2c-pport.o: i2c Primitive parallel port adapter module version %s (%s)\n", I2C_VERSION, I2C_DATE);
+
+ if (base==0) {
+ /* probe some values */
+ base=DEFAULT_BASE;
+ bit_pport_data.data=(void*)DEFAULT_BASE;
+ if (bit_pport_init()==0) {
+ if(i2c_bit_add_bus(&bit_pport_ops) < 0)
+ return -ENODEV;
+ } else {
+ return -ENODEV;
+ }
+ } else {
+ bit_pport_data.data=(void*)base;
+ if (bit_pport_init()==0) {
+ if(i2c_bit_add_bus(&bit_pport_ops) < 0)
+ return -ENODEV;
+ } else {
+ return -ENODEV;
+ }
+ }
+ printk("i2c-pport.o: found device at %#x.\n",base);
+ return 0;
+}
+
+
+EXPORT_NO_SYMBOLS;
+
+#ifdef MODULE
+MODULE_AUTHOR("Daniel Smolik <marvin@sitour.cz>");
+MODULE_DESCRIPTION("I2C-Bus adapter routines for Primitive parallel port adapter")
+;
+
+MODULE_PARM(base, "i");
+
+int init_module(void)
+{
+ return i2c_bitpport_init();
+}
+
+void cleanup_module(void)
+{
+ i2c_bit_del_bus(&bit_pport_ops);
+ bit_pport_exit();
+}
+
+#endif
--- /dev/null 1994-07-17 19:46:18.000000000 -0400
+++ linux/drivers/i2c/i2c-rpx.c 2002-07-23 01:45:46.000000000 -0400
@@ -0,0 +1,136 @@
+/*
+ * Embedded Planet RPX Lite MPC8xx CPM I2C interface.
+ * Copyright (c) 1999 Dan Malek (dmalek@jlc.net).
+ *
+ * moved into proper i2c interface;
+ * Brad Parker (brad@heeltoe.com)
+ *
+ * RPX lite specific parts of the i2c interface
+ * Update: There actually isn't anything RPXLite-specific about this module.
+ * This should work for most any 8xx board. The console messages have been
+ * changed to eliminate RPXLite references.
+ */
+
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/stddef.h>
+#include <linux/parport.h>
+
+#include <asm/mpc8xx.h>
+#include <asm/commproc.h>
+
+#include <linux/i2c.h>
+#include <linux/i2c-algo-8xx.h>
+
+static void
+rpx_iic_init(struct i2c_algo_8xx_data *data)
+{
+ volatile cpm8xx_t *cp;
+ volatile immap_t *immap;
+
+ cp = cpmp; /* Get pointer to Communication Processor */
+ immap = (immap_t *)IMAP_ADDR; /* and to internal registers */
+
+ data->iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
+
+ /* Check for and use a microcode relocation patch.
+ */
+ if ((data->reloc = data->iip->iic_rpbase))
+ data->iip = (iic_t *)&cp->cp_dpmem[data->iip->iic_rpbase];
+
+ data->i2c = (i2c8xx_t *)&(immap->im_i2c);
+ data->cp = cp;
+
+ /* Initialize Port B IIC pins.
+ */
+ cp->cp_pbpar |= 0x00000030;
+ cp->cp_pbdir |= 0x00000030;
+ cp->cp_pbodr |= 0x00000030;
+
+ /* Allocate space for two transmit and two receive buffer
+ * descriptors in the DP ram.
+ */
+ data->dp_addr = m8xx_cpm_dpalloc(sizeof(cbd_t) * 4);
+
+ /* ptr to i2c area */
+ data->i2c = (i2c8xx_t *)&(((immap_t *)IMAP_ADDR)->im_i2c);
+}
+
+static int rpx_install_isr(int irq, void (*func)(void *, void *), void *data)
+{
+ /* install interrupt handler */
+ cpm_install_handler(irq, (void (*)(void *, struct pt_regs *)) func, data);
+
+ return 0;
+}
+
+static int rpx_reg(struct i2c_client *client)
+{
+ return 0;
+}
+
+static int rpx_unreg(struct i2c_client *client)
+{
+ return 0;
+}
+
+static void rpx_inc_use(struct i2c_adapter *adap)
+{
+#ifdef MODULE
+ MOD_INC_USE_COUNT;
+#endif
+}
+
+static void rpx_dec_use(struct i2c_adapter *adap)
+{
+#ifdef MODULE
+ MOD_DEC_USE_COUNT;
+#endif
+}
+
+static struct i2c_algo_8xx_data rpx_data = {
+ setisr: rpx_install_isr
+};
+
+
+static struct i2c_adapter rpx_ops = {
+ "m8xx",
+ I2C_HW_MPC8XX_EPON,
+ NULL,
+ &rpx_data,
+ rpx_inc_use,
+ rpx_dec_use,
+ rpx_reg,
+ rpx_unreg,
+};
+
+int __init i2c_rpx_init(void)
+{
+ printk("i2c-rpx.o: i2c MPC8xx module version %s (%s)\n", I2C_VERSION, I2C_DATE);
+
+ /* reset hardware to sane state */
+ rpx_iic_init(&rpx_data);
+
+ if (i2c_8xx_add_bus(&rpx_ops) < 0) {
+ printk("i2c-rpx: Unable to register with I2C\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+void __exit i2c_rpx_exit(void)
+{
+ i2c_8xx_del_bus(&rpx_ops);
+}
+
+#ifdef MODULE
+MODULE_AUTHOR("Dan Malek <dmalek@jlc.net>");
+MODULE_DESCRIPTION("I2C-Bus adapter routines for MPC8xx boards");
+
+module_init(i2c_rpx_init);
+module_exit(i2c_rpx_exit);
+#endif
+
\
 
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