i2c: Delete the broken i2c-ite bus driver
The rest of the ITE8172 support was already removed from MIPS tree. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Acked-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Jean Delvare
Jean Delvare
Родитель
36cfb5ccfa
Коммит
51fd554b65
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@ -216,17 +216,6 @@ Who: Thomas Gleixner <tglx@linutronix.de>
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---------------------------
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What: i2c-ite and i2c-algo-ite drivers
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When: September 2006
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Why: These drivers never compiled since they were added to the kernel
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tree 5 years ago. This feature removal can be reevaluated if
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someone shows interest in the drivers, fixes them and takes over
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maintenance.
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http://marc.theaimsgroup.com/?l=linux-mips&m=115040510817448
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Who: Jean Delvare <khali@linux-fr.org>
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---------------------------
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What: Bridge netfilter deferred IPv4/IPv6 output hook calling
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When: January 2007
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Why: The deferred output hooks are a layering violation causing unusual
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@ -38,17 +38,6 @@ config I2C_ALGOPCA
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This support is also available as a module. If so, the module
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will be called i2c-algo-pca.
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config I2C_ALGOITE
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tristate "ITE I2C Algorithm"
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depends on MIPS_ITE8172 && I2C
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help
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This supports the use of the ITE8172 I2C interface found on some MIPS
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systems. Say Y if you have one of these. You should also say Y for
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the ITE I2C peripheral driver support below.
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This support is also available as a module. If so, the module
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will be called i2c-algo-ite.
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config I2C_ALGO8XX
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tristate "MPC8xx CPM I2C interface"
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depends on 8xx && I2C
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@ -5,7 +5,6 @@
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obj-$(CONFIG_I2C_ALGOBIT) += i2c-algo-bit.o
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obj-$(CONFIG_I2C_ALGOPCF) += i2c-algo-pcf.o
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obj-$(CONFIG_I2C_ALGOPCA) += i2c-algo-pca.o
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obj-$(CONFIG_I2C_ALGOITE) += i2c-algo-ite.o
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obj-$(CONFIG_I2C_ALGO_SGI) += i2c-algo-sgi.o
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ifeq ($(CONFIG_I2C_DEBUG_ALGO),y)
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@ -1,806 +0,0 @@
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/*
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-------------------------------------------------------------------------
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i2c-algo-ite.c i2c driver algorithms for ITE adapters
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Hai-Pao Fan, MontaVista Software, Inc.
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hpfan@mvista.com or source@mvista.com
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Copyright 2000 MontaVista Software Inc.
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---------------------------------------------------------------------------
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This file was highly leveraged from i2c-algo-pcf.c, which was created
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by Simon G. Vogl and Hans Berglund:
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Copyright (C) 1995-1997 Simon G. Vogl
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1998-2000 Hans Berglund
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* ------------------------------------------------------------------------- */
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/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
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Frodo Looijaard <frodol@dds.nl> ,and also from Martin Bailey
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<mbailey@littlefeet-inc.com> */
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <asm/uaccess.h>
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#include <linux/ioport.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/i2c.h>
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#include <linux/i2c-algo-ite.h>
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#include "i2c-algo-ite.h"
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#define PM_DSR IT8172_PCI_IO_BASE + IT_PM_DSR
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#define PM_IBSR IT8172_PCI_IO_BASE + IT_PM_DSR + 0x04
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#define GPIO_CCR IT8172_PCI_IO_BASE + IT_GPCCR
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#define DEB2(x) if (i2c_debug>=2) x
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#define DEB3(x) if (i2c_debug>=3) x /* print several statistical values*/
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#define DEF_TIMEOUT 16
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/* module parameters:
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*/
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static int i2c_debug;
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static int iic_test; /* see if the line-setting functions work */
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/* --- setting states on the bus with the right timing: --------------- */
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#define get_clock(adap) adap->getclock(adap->data)
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#define iic_outw(adap, reg, val) adap->setiic(adap->data, reg, val)
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#define iic_inw(adap, reg) adap->getiic(adap->data, reg)
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/* --- other auxiliary functions -------------------------------------- */
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static void iic_start(struct i2c_algo_iic_data *adap)
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{
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iic_outw(adap,ITE_I2CHCR,ITE_CMD);
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}
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static void iic_stop(struct i2c_algo_iic_data *adap)
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{
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iic_outw(adap,ITE_I2CHCR,0);
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iic_outw(adap,ITE_I2CHSR,ITE_I2CHSR_TDI);
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}
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static void iic_reset(struct i2c_algo_iic_data *adap)
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{
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iic_outw(adap, PM_IBSR, iic_inw(adap, PM_IBSR) | 0x80);
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}
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static int wait_for_bb(struct i2c_algo_iic_data *adap)
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{
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int timeout = DEF_TIMEOUT;
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short status;
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status = iic_inw(adap, ITE_I2CHSR);
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#ifndef STUB_I2C
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while (timeout-- && (status & ITE_I2CHSR_HB)) {
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udelay(1000); /* How much is this? */
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status = iic_inw(adap, ITE_I2CHSR);
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}
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#endif
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if (timeout<=0) {
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printk(KERN_ERR "Timeout, host is busy\n");
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iic_reset(adap);
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}
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return(timeout<=0);
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}
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/* After we issue a transaction on the IIC bus, this function
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* is called. It puts this process to sleep until we get an interrupt from
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* from the controller telling us that the transaction we requested in complete.
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*/
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static int wait_for_pin(struct i2c_algo_iic_data *adap, short *status) {
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int timeout = DEF_TIMEOUT;
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timeout = wait_for_bb(adap);
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if (timeout) {
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DEB2(printk("Timeout waiting for host not busy\n");)
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return -EIO;
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}
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timeout = DEF_TIMEOUT;
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*status = iic_inw(adap, ITE_I2CHSR);
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#ifndef STUB_I2C
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while (timeout-- && !(*status & ITE_I2CHSR_TDI)) {
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adap->waitforpin();
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*status = iic_inw(adap, ITE_I2CHSR);
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}
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#endif
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if (timeout <= 0)
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return(-1);
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else
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return(0);
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}
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static int wait_for_fe(struct i2c_algo_iic_data *adap, short *status)
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{
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int timeout = DEF_TIMEOUT;
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*status = iic_inw(adap, ITE_I2CFSR);
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#ifndef STUB_I2C
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while (timeout-- && (*status & ITE_I2CFSR_FE)) {
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udelay(1000);
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iic_inw(adap, ITE_I2CFSR);
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}
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#endif
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if (timeout <= 0)
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return(-1);
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else
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return(0);
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}
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static int iic_init (struct i2c_algo_iic_data *adap)
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{
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short i;
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/* Clear bit 7 to set I2C to normal operation mode */
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i=iic_inw(adap, PM_DSR)& 0xff7f;
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iic_outw(adap, PM_DSR, i);
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/* set IT_GPCCR port C bit 2&3 as function 2 */
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i = iic_inw(adap, GPIO_CCR) & 0xfc0f;
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iic_outw(adap,GPIO_CCR,i);
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/* Clear slave address/sub-address */
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iic_outw(adap,ITE_I2CSAR, 0);
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iic_outw(adap,ITE_I2CSSAR, 0);
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/* Set clock counter register */
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iic_outw(adap,ITE_I2CCKCNT, get_clock(adap));
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/* Set START/reSTART/STOP time registers */
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iic_outw(adap,ITE_I2CSHDR, 0x0a);
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iic_outw(adap,ITE_I2CRSUR, 0x0a);
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iic_outw(adap,ITE_I2CPSUR, 0x0a);
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/* Enable interrupts on completing the current transaction */
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iic_outw(adap,ITE_I2CHCR, ITE_I2CHCR_IE | ITE_I2CHCR_HCE);
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/* Clear transfer count */
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iic_outw(adap,ITE_I2CFBCR, 0x0);
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DEB2(printk("iic_init: Initialized IIC on ITE 0x%x\n",
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iic_inw(adap, ITE_I2CHSR)));
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return 0;
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}
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/*
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* Sanity check for the adapter hardware - check the reaction of
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* the bus lines only if it seems to be idle.
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*/
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static int test_bus(struct i2c_algo_iic_data *adap, char *name) {
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#if 0
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int scl,sda;
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sda=getsda(adap);
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if (adap->getscl==NULL) {
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printk("test_bus: Warning: Adapter can't read from clock line - skipping test.\n");
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return 0;
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}
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scl=getscl(adap);
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printk("test_bus: Adapter: %s scl: %d sda: %d -- testing...\n",
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name,getscl(adap),getsda(adap));
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if (!scl || !sda ) {
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printk("test_bus: %s seems to be busy.\n",adap->name);
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goto bailout;
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}
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sdalo(adap);
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printk("test_bus:1 scl: %d sda: %d\n", getscl(adap),
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getsda(adap));
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if ( 0 != getsda(adap) ) {
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printk("test_bus: %s SDA stuck high!\n",name);
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sdahi(adap);
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goto bailout;
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}
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if ( 0 == getscl(adap) ) {
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printk("test_bus: %s SCL unexpected low while pulling SDA low!\n",
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name);
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goto bailout;
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}
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sdahi(adap);
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printk("test_bus:2 scl: %d sda: %d\n", getscl(adap),
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getsda(adap));
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if ( 0 == getsda(adap) ) {
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printk("test_bus: %s SDA stuck low!\n",name);
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sdahi(adap);
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goto bailout;
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}
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if ( 0 == getscl(adap) ) {
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printk("test_bus: %s SCL unexpected low while SDA high!\n",
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adap->name);
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goto bailout;
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}
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scllo(adap);
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printk("test_bus:3 scl: %d sda: %d\n", getscl(adap),
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getsda(adap));
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if ( 0 != getscl(adap) ) {
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sclhi(adap);
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goto bailout;
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}
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if ( 0 == getsda(adap) ) {
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printk("test_bus: %s SDA unexpected low while pulling SCL low!\n",
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name);
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goto bailout;
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}
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sclhi(adap);
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printk("test_bus:4 scl: %d sda: %d\n", getscl(adap),
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getsda(adap));
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if ( 0 == getscl(adap) ) {
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printk("test_bus: %s SCL stuck low!\n",name);
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sclhi(adap);
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goto bailout;
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}
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if ( 0 == getsda(adap) ) {
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printk("test_bus: %s SDA unexpected low while SCL high!\n",
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name);
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goto bailout;
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}
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printk("test_bus: %s passed test.\n",name);
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return 0;
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bailout:
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sdahi(adap);
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sclhi(adap);
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return -ENODEV;
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#endif
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return (0);
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}
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/* ----- Utility functions
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*/
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/* Verify the device we want to talk to on the IIC bus really exists. */
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static inline int try_address(struct i2c_algo_iic_data *adap,
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unsigned int addr, int retries)
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{
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int i, ret = -1;
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short status;
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for (i=0;i<retries;i++) {
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iic_outw(adap, ITE_I2CSAR, addr);
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iic_start(adap);
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if (wait_for_pin(adap, &status) == 0) {
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if ((status & ITE_I2CHSR_DNE) == 0) {
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iic_stop(adap);
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iic_outw(adap, ITE_I2CFCR, ITE_I2CFCR_FLUSH);
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ret=1;
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break; /* success! */
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}
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}
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iic_stop(adap);
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udelay(adap->udelay);
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}
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DEB2(if (i) printk("try_address: needed %d retries for 0x%x\n",i,
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addr));
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return ret;
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}
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static int iic_sendbytes(struct i2c_adapter *i2c_adap,const char *buf,
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int count)
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{
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struct i2c_algo_iic_data *adap = i2c_adap->algo_data;
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int wrcount=0, timeout;
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short status;
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int loops, remainder, i, j;
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union {
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char byte[2];
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unsigned short word;
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} tmp;
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iic_outw(adap, ITE_I2CSSAR, (unsigned short)buf[wrcount++]);
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count--;
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if (count == 0)
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return -EIO;
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loops = count / 32; /* 32-byte FIFO */
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remainder = count % 32;
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if(loops) {
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for(i=0; i<loops; i++) {
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iic_outw(adap, ITE_I2CFBCR, 32);
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for(j=0; j<32/2; j++) {
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tmp.byte[1] = buf[wrcount++];
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tmp.byte[0] = buf[wrcount++];
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iic_outw(adap, ITE_I2CFDR, tmp.word);
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}
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/* status FIFO overrun */
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iic_inw(adap, ITE_I2CFSR);
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iic_inw(adap, ITE_I2CFBCR);
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iic_outw(adap, ITE_I2CHCR, ITE_WRITE); /* Issue WRITE command */
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/* Wait for transmission to complete */
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timeout = wait_for_pin(adap, &status);
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if(timeout) {
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iic_stop(adap);
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printk("iic_sendbytes: %s write timeout.\n", i2c_adap->name);
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return -EREMOTEIO; /* got a better one ?? */
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}
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if (status & ITE_I2CHSR_DB) {
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iic_stop(adap);
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printk("iic_sendbytes: %s write error - no ack.\n", i2c_adap->name);
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return -EREMOTEIO; /* got a better one ?? */
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}
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}
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}
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if(remainder) {
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iic_outw(adap, ITE_I2CFBCR, remainder);
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for(i=0; i<remainder/2; i++) {
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tmp.byte[1] = buf[wrcount++];
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tmp.byte[0] = buf[wrcount++];
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iic_outw(adap, ITE_I2CFDR, tmp.word);
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}
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/* status FIFO overrun */
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iic_inw(adap, ITE_I2CFSR);
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iic_inw(adap, ITE_I2CFBCR);
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|
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iic_outw(adap, ITE_I2CHCR, ITE_WRITE); /* Issue WRITE command */
|
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timeout = wait_for_pin(adap, &status);
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if(timeout) {
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iic_stop(adap);
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printk("iic_sendbytes: %s write timeout.\n", i2c_adap->name);
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return -EREMOTEIO; /* got a better one ?? */
|
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}
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#ifndef STUB_I2C
|
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if (status & ITE_I2CHSR_DB) {
|
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iic_stop(adap);
|
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printk("iic_sendbytes: %s write error - no ack.\n", i2c_adap->name);
|
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return -EREMOTEIO; /* got a better one ?? */
|
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}
|
||||
#endif
|
||||
}
|
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iic_stop(adap);
|
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return wrcount;
|
||||
}
|
||||
|
||||
|
||||
static int iic_readbytes(struct i2c_adapter *i2c_adap, char *buf, int count,
|
||||
int sread)
|
||||
{
|
||||
int rdcount=0, i, timeout;
|
||||
short status;
|
||||
struct i2c_algo_iic_data *adap = i2c_adap->algo_data;
|
||||
int loops, remainder, j;
|
||||
union {
|
||||
char byte[2];
|
||||
unsigned short word;
|
||||
} tmp;
|
||||
|
||||
loops = count / 32; /* 32-byte FIFO */
|
||||
remainder = count % 32;
|
||||
|
||||
if(loops) {
|
||||
for(i=0; i<loops; i++) {
|
||||
iic_outw(adap, ITE_I2CFBCR, 32);
|
||||
if (sread)
|
||||
iic_outw(adap, ITE_I2CHCR, ITE_SREAD);
|
||||
else
|
||||
iic_outw(adap, ITE_I2CHCR, ITE_READ); /* Issue READ command */
|
||||
|
||||
timeout = wait_for_pin(adap, &status);
|
||||
if(timeout) {
|
||||
iic_stop(adap);
|
||||
printk("iic_readbytes: %s read timeout.\n", i2c_adap->name);
|
||||
return (-1);
|
||||
}
|
||||
#ifndef STUB_I2C
|
||||
if (status & ITE_I2CHSR_DB) {
|
||||
iic_stop(adap);
|
||||
printk("iic_readbytes: %s read error - no ack.\n", i2c_adap->name);
|
||||
return (-1);
|
||||
}
|
||||
#endif
|
||||
|
||||
timeout = wait_for_fe(adap, &status);
|
||||
if(timeout) {
|
||||
iic_stop(adap);
|
||||
printk("iic_readbytes: %s FIFO is empty\n", i2c_adap->name);
|
||||
return (-1);
|
||||
}
|
||||
|
||||
for(j=0; j<32/2; j++) {
|
||||
tmp.word = iic_inw(adap, ITE_I2CFDR);
|
||||
buf[rdcount++] = tmp.byte[1];
|
||||
buf[rdcount++] = tmp.byte[0];
|
||||
}
|
||||
|
||||
/* status FIFO underrun */
|
||||
iic_inw(adap, ITE_I2CFSR);
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
if(remainder) {
|
||||
remainder=(remainder+1)/2 * 2;
|
||||
iic_outw(adap, ITE_I2CFBCR, remainder);
|
||||
if (sread)
|
||||
iic_outw(adap, ITE_I2CHCR, ITE_SREAD);
|
||||
else
|
||||
iic_outw(adap, ITE_I2CHCR, ITE_READ); /* Issue READ command */
|
||||
|
||||
timeout = wait_for_pin(adap, &status);
|
||||
if(timeout) {
|
||||
iic_stop(adap);
|
||||
printk("iic_readbytes: %s read timeout.\n", i2c_adap->name);
|
||||
return (-1);
|
||||
}
|
||||
#ifndef STUB_I2C
|
||||
if (status & ITE_I2CHSR_DB) {
|
||||
iic_stop(adap);
|
||||
printk("iic_readbytes: %s read error - no ack.\n", i2c_adap->name);
|
||||
return (-1);
|
||||
}
|
||||
#endif
|
||||
timeout = wait_for_fe(adap, &status);
|
||||
if(timeout) {
|
||||
iic_stop(adap);
|
||||
printk("iic_readbytes: %s FIFO is empty\n", i2c_adap->name);
|
||||
return (-1);
|
||||
}
|
||||
|
||||
for(i=0; i<(remainder+1)/2; i++) {
|
||||
tmp.word = iic_inw(adap, ITE_I2CFDR);
|
||||
buf[rdcount++] = tmp.byte[1];
|
||||
buf[rdcount++] = tmp.byte[0];
|
||||
}
|
||||
|
||||
/* status FIFO underrun */
|
||||
iic_inw(adap, ITE_I2CFSR);
|
||||
|
||||
}
|
||||
|
||||
iic_stop(adap);
|
||||
return rdcount;
|
||||
}
|
||||
|
||||
|
||||
/* This function implements combined transactions. Combined
|
||||
* transactions consist of combinations of reading and writing blocks of data.
|
||||
* Each transfer (i.e. a read or a write) is separated by a repeated start
|
||||
* condition.
|
||||
*/
|
||||
#if 0
|
||||
static int iic_combined_transaction(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
|
||||
{
|
||||
int i;
|
||||
struct i2c_msg *pmsg;
|
||||
int ret;
|
||||
|
||||
DEB2(printk("Beginning combined transaction\n"));
|
||||
|
||||
for(i=0; i<(num-1); i++) {
|
||||
pmsg = &msgs[i];
|
||||
if(pmsg->flags & I2C_M_RD) {
|
||||
DEB2(printk(" This one is a read\n"));
|
||||
ret = iic_readbytes(i2c_adap, pmsg->buf, pmsg->len, IIC_COMBINED_XFER);
|
||||
}
|
||||
else if(!(pmsg->flags & I2C_M_RD)) {
|
||||
DEB2(printk("This one is a write\n"));
|
||||
ret = iic_sendbytes(i2c_adap, pmsg->buf, pmsg->len, IIC_COMBINED_XFER);
|
||||
}
|
||||
}
|
||||
/* Last read or write segment needs to be terminated with a stop */
|
||||
pmsg = &msgs[i];
|
||||
|
||||
if(pmsg->flags & I2C_M_RD) {
|
||||
DEB2(printk("Doing the last read\n"));
|
||||
ret = iic_readbytes(i2c_adap, pmsg->buf, pmsg->len, IIC_SINGLE_XFER);
|
||||
}
|
||||
else if(!(pmsg->flags & I2C_M_RD)) {
|
||||
DEB2(printk("Doing the last write\n"));
|
||||
ret = iic_sendbytes(i2c_adap, pmsg->buf, pmsg->len, IIC_SINGLE_XFER);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
/* Whenever we initiate a transaction, the first byte clocked
|
||||
* onto the bus after the start condition is the address (7 bit) of the
|
||||
* device we want to talk to. This function manipulates the address specified
|
||||
* so that it makes sense to the hardware when written to the IIC peripheral.
|
||||
*
|
||||
* Note: 10 bit addresses are not supported in this driver, although they are
|
||||
* supported by the hardware. This functionality needs to be implemented.
|
||||
*/
|
||||
static inline int iic_doAddress(struct i2c_algo_iic_data *adap,
|
||||
struct i2c_msg *msg, int retries)
|
||||
{
|
||||
unsigned short flags = msg->flags;
|
||||
unsigned int addr;
|
||||
int ret;
|
||||
|
||||
/* Ten bit addresses not supported right now */
|
||||
if ( (flags & I2C_M_TEN) ) {
|
||||
#if 0
|
||||
addr = 0xf0 | (( msg->addr >> 7) & 0x03);
|
||||
DEB2(printk("addr0: %d\n",addr));
|
||||
ret = try_address(adap, addr, retries);
|
||||
if (ret!=1) {
|
||||
printk("iic_doAddress: died at extended address code.\n");
|
||||
return -EREMOTEIO;
|
||||
}
|
||||
iic_outw(adap,msg->addr & 0x7f);
|
||||
if (ret != 1) {
|
||||
printk("iic_doAddress: died at 2nd address code.\n");
|
||||
return -EREMOTEIO;
|
||||
}
|
||||
if ( flags & I2C_M_RD ) {
|
||||
i2c_repstart(adap);
|
||||
addr |= 0x01;
|
||||
ret = try_address(adap, addr, retries);
|
||||
if (ret!=1) {
|
||||
printk("iic_doAddress: died at extended address code.\n");
|
||||
return -EREMOTEIO;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
} else {
|
||||
|
||||
addr = ( msg->addr << 1 );
|
||||
|
||||
#if 0
|
||||
if (flags & I2C_M_RD )
|
||||
addr |= 1;
|
||||
if (flags & I2C_M_REV_DIR_ADDR )
|
||||
addr ^= 1;
|
||||
#endif
|
||||
|
||||
if (iic_inw(adap, ITE_I2CSAR) != addr) {
|
||||
iic_outw(adap, ITE_I2CSAR, addr);
|
||||
ret = try_address(adap, addr, retries);
|
||||
if (ret!=1) {
|
||||
printk("iic_doAddress: died at address code.\n");
|
||||
return -EREMOTEIO;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* Description: Prepares the controller for a transaction (clearing status
|
||||
* registers, data buffers, etc), and then calls either iic_readbytes or
|
||||
* iic_sendbytes to do the actual transaction.
|
||||
*
|
||||
* still to be done: Before we issue a transaction, we should
|
||||
* verify that the bus is not busy or in some unknown state.
|
||||
*/
|
||||
static int iic_xfer(struct i2c_adapter *i2c_adap,
|
||||
struct i2c_msg *msgs,
|
||||
int num)
|
||||
{
|
||||
struct i2c_algo_iic_data *adap = i2c_adap->algo_data;
|
||||
struct i2c_msg *pmsg;
|
||||
int i = 0;
|
||||
int ret, timeout;
|
||||
|
||||
pmsg = &msgs[i];
|
||||
|
||||
if(!pmsg->len) {
|
||||
DEB2(printk("iic_xfer: read/write length is 0\n");)
|
||||
return -EIO;
|
||||
}
|
||||
if(!(pmsg->flags & I2C_M_RD) && (!(pmsg->len)%2) ) {
|
||||
DEB2(printk("iic_xfer: write buffer length is not odd\n");)
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* Wait for any pending transfers to complete */
|
||||
timeout = wait_for_bb(adap);
|
||||
if (timeout) {
|
||||
DEB2(printk("iic_xfer: Timeout waiting for host not busy\n");)
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* Flush FIFO */
|
||||
iic_outw(adap, ITE_I2CFCR, ITE_I2CFCR_FLUSH);
|
||||
|
||||
/* Load address */
|
||||
ret = iic_doAddress(adap, pmsg, i2c_adap->retries);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
#if 0
|
||||
/* Combined transaction (read and write) */
|
||||
if(num > 1) {
|
||||
DEB2(printk("iic_xfer: Call combined transaction\n"));
|
||||
ret = iic_combined_transaction(i2c_adap, msgs, num);
|
||||
}
|
||||
#endif
|
||||
|
||||
DEB3(printk("iic_xfer: Msg %d, addr=0x%x, flags=0x%x, len=%d\n",
|
||||
i, msgs[i].addr, msgs[i].flags, msgs[i].len);)
|
||||
|
||||
if(pmsg->flags & I2C_M_RD) /* Read */
|
||||
ret = iic_readbytes(i2c_adap, pmsg->buf, pmsg->len, 0);
|
||||
else { /* Write */
|
||||
udelay(1000);
|
||||
ret = iic_sendbytes(i2c_adap, pmsg->buf, pmsg->len);
|
||||
}
|
||||
|
||||
if (ret != pmsg->len)
|
||||
DEB3(printk("iic_xfer: error or fail on read/write %d bytes.\n",ret));
|
||||
else
|
||||
DEB3(printk("iic_xfer: read/write %d bytes.\n",ret));
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/* Implements device specific ioctls. Higher level ioctls can
|
||||
* be found in i2c-core.c and are typical of any i2c controller (specifying
|
||||
* slave address, timeouts, etc). These ioctls take advantage of any hardware
|
||||
* features built into the controller for which this algorithm-adapter set
|
||||
* was written. These ioctls allow you to take control of the data and clock
|
||||
* lines and set the either high or low,
|
||||
* similar to a GPIO pin.
|
||||
*/
|
||||
static int algo_control(struct i2c_adapter *adapter,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
|
||||
struct i2c_algo_iic_data *adap = adapter->algo_data;
|
||||
struct i2c_iic_msg s_msg;
|
||||
char *buf;
|
||||
int ret;
|
||||
|
||||
if (cmd == I2C_SREAD) {
|
||||
if(copy_from_user(&s_msg, (struct i2c_iic_msg *)arg,
|
||||
sizeof(struct i2c_iic_msg)))
|
||||
return -EFAULT;
|
||||
buf = kmalloc(s_msg.len, GFP_KERNEL);
|
||||
if (buf== NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
/* Flush FIFO */
|
||||
iic_outw(adap, ITE_I2CFCR, ITE_I2CFCR_FLUSH);
|
||||
|
||||
/* Load address */
|
||||
iic_outw(adap, ITE_I2CSAR,s_msg.addr<<1);
|
||||
iic_outw(adap, ITE_I2CSSAR,s_msg.waddr & 0xff);
|
||||
|
||||
ret = iic_readbytes(adapter, buf, s_msg.len, 1);
|
||||
if (ret>=0) {
|
||||
if(copy_to_user( s_msg.buf, buf, s_msg.len) )
|
||||
ret = -EFAULT;
|
||||
}
|
||||
kfree(buf);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static u32 iic_func(struct i2c_adapter *adap)
|
||||
{
|
||||
return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR |
|
||||
I2C_FUNC_PROTOCOL_MANGLING;
|
||||
}
|
||||
|
||||
/* -----exported algorithm data: ------------------------------------- */
|
||||
|
||||
static struct i2c_algorithm iic_algo = {
|
||||
.master_xfer = iic_xfer,
|
||||
.algo_control = algo_control, /* ioctl */
|
||||
.functionality = iic_func,
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* registering functions to load algorithms at runtime
|
||||
*/
|
||||
int i2c_iic_add_bus(struct i2c_adapter *adap)
|
||||
{
|
||||
struct i2c_algo_iic_data *iic_adap = adap->algo_data;
|
||||
|
||||
if (iic_test) {
|
||||
int ret = test_bus(iic_adap, adap->name);
|
||||
if (ret<0)
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
DEB2(printk("i2c-algo-ite: hw routines for %s registered.\n",
|
||||
adap->name));
|
||||
|
||||
/* register new adapter to i2c module... */
|
||||
adap->algo = &iic_algo;
|
||||
|
||||
adap->timeout = 100; /* default values, should */
|
||||
adap->retries = 3; /* be replaced by defines */
|
||||
adap->flags = 0;
|
||||
|
||||
iic_init(iic_adap);
|
||||
return i2c_add_adapter(adap);
|
||||
}
|
||||
|
||||
|
||||
int i2c_iic_del_bus(struct i2c_adapter *adap)
|
||||
{
|
||||
int res;
|
||||
if ((res = i2c_del_adapter(adap)) < 0)
|
||||
return res;
|
||||
DEB2(printk("i2c-algo-ite: adapter unregistered: %s\n",adap->name));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int __init i2c_algo_iic_init (void)
|
||||
{
|
||||
printk(KERN_INFO "ITE iic (i2c) algorithm module\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
void i2c_algo_iic_exit(void)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
EXPORT_SYMBOL(i2c_iic_add_bus);
|
||||
EXPORT_SYMBOL(i2c_iic_del_bus);
|
||||
|
||||
/* The MODULE_* macros resolve to nothing if MODULES is not defined
|
||||
* when this file is compiled.
|
||||
*/
|
||||
MODULE_AUTHOR("MontaVista Software <www.mvista.com>");
|
||||
MODULE_DESCRIPTION("ITE iic algorithm");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
module_param(iic_test, bool, 0);
|
||||
module_param(i2c_debug, int, S_IRUGO | S_IWUSR);
|
||||
|
||||
MODULE_PARM_DESC(iic_test, "Test if the I2C bus is available");
|
||||
MODULE_PARM_DESC(i2c_debug,
|
||||
"debug level - 0 off; 1 normal; 2,3 more verbose; 9 iic-protocol");
|
||||
|
||||
|
||||
/* This function resolves to init_module (the function invoked when a module
|
||||
* is loaded via insmod) when this file is compiled with MODULES defined.
|
||||
* Otherwise (i.e. if you want this driver statically linked to the kernel),
|
||||
* a pointer to this function is stored in a table and called
|
||||
* during the initialization of the kernel (in do_basic_setup in /init/main.c)
|
||||
*
|
||||
* All this functionality is complements of the macros defined in linux/init.h
|
||||
*/
|
||||
module_init(i2c_algo_iic_init);
|
||||
|
||||
|
||||
/* If MODULES is defined when this file is compiled, then this function will
|
||||
* resolved to cleanup_module.
|
||||
*/
|
||||
module_exit(i2c_algo_iic_exit);
|
||||
|
|
@ -1,117 +0,0 @@
|
|||
/*
|
||||
--------------------------------------------------------------------
|
||||
i2c-ite.h: Global defines for the I2C controller on board the
|
||||
ITE MIPS processor.
|
||||
--------------------------------------------------------------------
|
||||
Hai-Pao Fan, MontaVista Software, Inc.
|
||||
hpfan@mvista.com or source@mvista.com
|
||||
|
||||
Copyright 2001 MontaVista Software Inc.
|
||||
|
||||
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
||||
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
||||
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
||||
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* 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.
|
||||
|
||||
*/
|
||||
|
||||
#ifndef I2C_ITE_H
|
||||
#define I2C_ITE_H 1
|
||||
|
||||
#include <asm/it8172/it8172.h>
|
||||
|
||||
/* I2C Registers */
|
||||
#define ITE_I2CHCR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x30
|
||||
#define ITE_I2CHSR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x34
|
||||
#define ITE_I2CSAR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x38
|
||||
#define ITE_I2CSSAR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x3c
|
||||
#define ITE_I2CCKCNT IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x48
|
||||
#define ITE_I2CSHDR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x4c
|
||||
#define ITE_I2CRSUR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x50
|
||||
#define ITE_I2CPSUR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x54
|
||||
|
||||
#define ITE_I2CFDR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x70
|
||||
#define ITE_I2CFBCR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x74
|
||||
#define ITE_I2CFCR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x78
|
||||
#define ITE_I2CFSR IT8172_PCI_IO_BASE + IT_I2C_BASE + 0x7c
|
||||
|
||||
|
||||
/* Host Control Register ITE_I2CHCR */
|
||||
#define ITE_I2CHCR_HCE 0x01 /* Enable I2C Host Controller */
|
||||
#define ITE_I2CHCR_IE 0x02 /* Enable the interrupt after completing
|
||||
the current transaction */
|
||||
#define ITE_I2CHCR_CP_W 0x00 /* bit2-4 000 - Write */
|
||||
#define ITE_I2CHCR_CP_R 0x08 /* 010 - Current address read */
|
||||
#define ITE_I2CHCR_CP_S 0x10 /* 100 - Sequential read */
|
||||
#define ITE_I2CHCR_ST 0x20 /* Initiates the I2C host controller to execute
|
||||
the command and send the data programmed in
|
||||
all required registers to I2C bus */
|
||||
#define ITE_CMD ITE_I2CHCR_HCE | ITE_I2CHCR_IE | ITE_I2CHCR_ST
|
||||
#define ITE_WRITE ITE_CMD | ITE_I2CHCR_CP_W
|
||||
#define ITE_READ ITE_CMD | ITE_I2CHCR_CP_R
|
||||
#define ITE_SREAD ITE_CMD | ITE_I2CHCR_CP_S
|
||||
|
||||
/* Host Status Register ITE_I2CHSR */
|
||||
#define ITE_I2CHSR_DB 0x01 /* Device is busy, receives NACK response except
|
||||
in the first and last bytes */
|
||||
#define ITE_I2CHSR_DNE 0x02 /* Target address on I2C bus does not exist */
|
||||
#define ITE_I2CHSR_TDI 0x04 /* R/W Transaction on I2C bus was completed */
|
||||
#define ITE_I2CHSR_HB 0x08 /* Host controller is processing transactions */
|
||||
#define ITE_I2CHSR_FER 0x10 /* Error occurs in the FIFO */
|
||||
|
||||
/* Slave Address Register ITE_I2CSAR */
|
||||
#define ITE_I2CSAR_SA_MASK 0xfe /* Target I2C device address */
|
||||
#define ITE_I2CSAR_ASO 0x0100 /* Output 1/0 to I2CAS port when the
|
||||
next slave address is addressed */
|
||||
|
||||
/* Slave Sub-address Register ITE_I2CSSAR */
|
||||
#define ITE_I2CSSAR_SUBA_MASK 0xff /* Target I2C device sub-address */
|
||||
|
||||
/* Clock Counter Register ITE_I2CCKCNT */
|
||||
#define ITE_I2CCKCNT_STOP 0x00 /* stop I2C clock */
|
||||
#define ITE_I2CCKCNT_HPCC_MASK 0x7f /* SCL high period counter */
|
||||
#define ITE_I2CCKCNT_LPCC_MASK 0x7f00 /* SCL low period counter */
|
||||
|
||||
/* START Hold Time Register ITE_I2CSHDR */
|
||||
/* value is counted based on 16 MHz internal clock */
|
||||
#define ITE_I2CSHDR_FM 0x0a /* START condition at fast mode */
|
||||
#define ITE_I2CSHDR_SM 0x47 /* START contition at standard mode */
|
||||
|
||||
/* (Repeated) START Setup Time Register ITE_I2CRSUR */
|
||||
/* value is counted based on 16 MHz internal clock */
|
||||
#define ITE_I2CRSUR_FM 0x0a /* repeated START condition at fast mode */
|
||||
#define ITE_I2CRSUR_SM 0x50 /* repeated START condition at standard mode */
|
||||
|
||||
/* STOP setup Time Register ITE_I2CPSUR */
|
||||
|
||||
/* FIFO Data Register ITE_I2CFDR */
|
||||
#define ITE_I2CFDR_MASK 0xff
|
||||
|
||||
/* FIFO Byte Count Register ITE_I2CFBCR */
|
||||
#define ITE_I2CFBCR_MASK 0x3f
|
||||
|
||||
/* FIFO Control Register ITE_I2CFCR */
|
||||
#define ITE_I2CFCR_FLUSH 0x01 /* Flush FIFO and reset the FIFO point
|
||||
and I2CFSR */
|
||||
/* FIFO Status Register ITE_I2CFSR */
|
||||
#define ITE_I2CFSR_FO 0x01 /* FIFO is overrun when write */
|
||||
#define ITE_I2CFSR_FU 0x02 /* FIFO is underrun when read */
|
||||
#define ITE_I2CFSR_FF 0x04 /* FIFO is full when write */
|
||||
#define ITE_I2CFSR_FE 0x08 /* FIFO is empty when read */
|
||||
|
||||
#endif /* I2C_ITE_H */
|
||||
|
|
@ -209,18 +209,6 @@ config I2C_ISA
|
|||
tristate
|
||||
depends on I2C
|
||||
|
||||
config I2C_ITE
|
||||
tristate "ITE I2C Adapter"
|
||||
depends on I2C && MIPS_ITE8172
|
||||
select I2C_ALGOITE
|
||||
help
|
||||
This supports the ITE8172 I2C peripheral found on some MIPS
|
||||
systems. Say Y if you have one of these. You should also say Y for
|
||||
the ITE I2C driver algorithm support above.
|
||||
|
||||
This support is also available as a module. If so, the module
|
||||
will be called i2c-ite.
|
||||
|
||||
config I2C_IXP4XX
|
||||
tristate "IXP4xx GPIO-Based I2C Interface"
|
||||
depends on I2C && ARCH_IXP4XX
|
||||
|
|
|
|||
|
|
@ -16,7 +16,6 @@ obj-$(CONFIG_I2C_I810) += i2c-i810.o
|
|||
obj-$(CONFIG_I2C_IBM_IIC) += i2c-ibm_iic.o
|
||||
obj-$(CONFIG_I2C_IOP3XX) += i2c-iop3xx.o
|
||||
obj-$(CONFIG_I2C_ISA) += i2c-isa.o
|
||||
obj-$(CONFIG_I2C_ITE) += i2c-ite.o
|
||||
obj-$(CONFIG_I2C_IXP2000) += i2c-ixp2000.o
|
||||
obj-$(CONFIG_I2C_IXP4XX) += i2c-ixp4xx.o
|
||||
obj-$(CONFIG_I2C_POWERMAC) += i2c-powermac.o
|
||||
|
|
|
|||
|
|
@ -1,278 +0,0 @@
|
|||
/*
|
||||
-------------------------------------------------------------------------
|
||||
i2c-adap-ite.c i2c-hw access for the IIC peripheral on the ITE MIPS system
|
||||
-------------------------------------------------------------------------
|
||||
Hai-Pao Fan, MontaVista Software, Inc.
|
||||
hpfan@mvista.com or source@mvista.com
|
||||
|
||||
Copyright 2001 MontaVista Software Inc.
|
||||
|
||||
----------------------------------------------------------------------------
|
||||
This file was highly leveraged from i2c-elektor.c, which was created
|
||||
by Simon G. Vogl and Hans Berglund:
|
||||
|
||||
|
||||
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> */
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/wait.h>
|
||||
#include <asm/irq.h>
|
||||
#include <asm/io.h>
|
||||
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/i2c-algo-ite.h>
|
||||
#include <linux/i2c-adap-ite.h>
|
||||
#include "../i2c-ite.h"
|
||||
|
||||
#define DEFAULT_BASE 0x14014030
|
||||
#define ITE_IIC_IO_SIZE 0x40
|
||||
#define DEFAULT_IRQ 0
|
||||
#define DEFAULT_CLOCK 0x1b0e /* default 16MHz/(27+14) = 400KHz */
|
||||
#define DEFAULT_OWN 0x55
|
||||
|
||||
static int base;
|
||||
static int irq;
|
||||
static int clock;
|
||||
static int own;
|
||||
|
||||
static struct iic_ite gpi;
|
||||
static wait_queue_head_t iic_wait;
|
||||
static int iic_pending;
|
||||
static spinlock_t lock;
|
||||
|
||||
/* ----- local functions ---------------------------------------------- */
|
||||
|
||||
static void iic_ite_setiic(void *data, int ctl, short val)
|
||||
{
|
||||
unsigned long j = jiffies + 10;
|
||||
|
||||
pr_debug(" Write 0x%02x to 0x%x\n",(unsigned short)val, ctl&0xff);
|
||||
#ifdef DEBUG
|
||||
while (time_before(jiffies, j))
|
||||
schedule();
|
||||
#endif
|
||||
outw(val,ctl);
|
||||
}
|
||||
|
||||
static short iic_ite_getiic(void *data, int ctl)
|
||||
{
|
||||
short val;
|
||||
|
||||
val = inw(ctl);
|
||||
pr_debug("Read 0x%02x from 0x%x\n",(unsigned short)val, ctl&0xff);
|
||||
return (val);
|
||||
}
|
||||
|
||||
/* Return our slave address. This is the address
|
||||
* put on the I2C bus when another master on the bus wants to address us
|
||||
* as a slave
|
||||
*/
|
||||
static int iic_ite_getown(void *data)
|
||||
{
|
||||
return (gpi.iic_own);
|
||||
}
|
||||
|
||||
|
||||
static int iic_ite_getclock(void *data)
|
||||
{
|
||||
return (gpi.iic_clock);
|
||||
}
|
||||
|
||||
|
||||
/* Put this process to sleep. We will wake up when the
|
||||
* IIC controller interrupts.
|
||||
*/
|
||||
static void iic_ite_waitforpin(void) {
|
||||
DEFINE_WAIT(wait);
|
||||
int timeout = 2;
|
||||
unsigned long flags;
|
||||
|
||||
/* If interrupts are enabled (which they are), then put the process to
|
||||
* sleep. This process will be awakened by two events -- either the
|
||||
* the IIC peripheral interrupts or the timeout expires.
|
||||
* If interrupts are not enabled then delay for a reasonable amount
|
||||
* of time and return.
|
||||
*/
|
||||
if (gpi.iic_irq > 0) {
|
||||
spin_lock_irqsave(&lock, flags);
|
||||
if (iic_pending == 0) {
|
||||
spin_unlock_irqrestore(&lock, flags);
|
||||
prepare_to_wait(&iic_wait, &wait, TASK_INTERRUPTIBLE);
|
||||
if (schedule_timeout(timeout*HZ)) {
|
||||
spin_lock_irqsave(&lock, flags);
|
||||
if (iic_pending == 1) {
|
||||
iic_pending = 0;
|
||||
}
|
||||
spin_unlock_irqrestore(&lock, flags);
|
||||
}
|
||||
finish_wait(&iic_wait, &wait);
|
||||
} else {
|
||||
iic_pending = 0;
|
||||
spin_unlock_irqrestore(&lock, flags);
|
||||
}
|
||||
} else {
|
||||
udelay(100);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static irqreturn_t iic_ite_handler(int this_irq, void *dev_id)
|
||||
{
|
||||
spin_lock(&lock);
|
||||
iic_pending = 1;
|
||||
spin_unlock(&lock);
|
||||
|
||||
wake_up_interruptible(&iic_wait);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
|
||||
/* Lock the region of memory where I/O registers exist. Request our
|
||||
* interrupt line and register its associated handler.
|
||||
*/
|
||||
static int iic_hw_resrc_init(void)
|
||||
{
|
||||
if (!request_region(gpi.iic_base, ITE_IIC_IO_SIZE, "i2c"))
|
||||
return -ENODEV;
|
||||
|
||||
if (gpi.iic_irq <= 0)
|
||||
return 0;
|
||||
|
||||
if (request_irq(gpi.iic_irq, iic_ite_handler, 0, "ITE IIC", 0) < 0)
|
||||
gpi.iic_irq = 0;
|
||||
else
|
||||
enable_irq(gpi.iic_irq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static void iic_ite_release(void)
|
||||
{
|
||||
if (gpi.iic_irq > 0) {
|
||||
disable_irq(gpi.iic_irq);
|
||||
free_irq(gpi.iic_irq, 0);
|
||||
}
|
||||
release_region(gpi.iic_base , 2);
|
||||
}
|
||||
|
||||
/* ------------------------------------------------------------------------
|
||||
* 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_iic_data iic_ite_data = {
|
||||
NULL,
|
||||
iic_ite_setiic,
|
||||
iic_ite_getiic,
|
||||
iic_ite_getown,
|
||||
iic_ite_getclock,
|
||||
iic_ite_waitforpin,
|
||||
80, 80, 100, /* waits, timeout */
|
||||
};
|
||||
|
||||
static struct i2c_adapter iic_ite_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.id = I2C_HW_I_IIC,
|
||||
.algo_data = &iic_ite_data,
|
||||
.name = "ITE IIC adapter",
|
||||
};
|
||||
|
||||
/* Called when the module is loaded. This function starts the
|
||||
* cascade of calls up through the hierarchy of i2c modules (i.e. up to the
|
||||
* algorithm layer and into to the core layer)
|
||||
*/
|
||||
static int __init iic_ite_init(void)
|
||||
{
|
||||
|
||||
struct iic_ite *piic = &gpi;
|
||||
|
||||
printk(KERN_INFO "Initialize ITE IIC adapter module\n");
|
||||
if (base == 0)
|
||||
piic->iic_base = DEFAULT_BASE;
|
||||
else
|
||||
piic->iic_base = base;
|
||||
|
||||
if (irq == 0)
|
||||
piic->iic_irq = DEFAULT_IRQ;
|
||||
else
|
||||
piic->iic_irq = irq;
|
||||
|
||||
if (clock == 0)
|
||||
piic->iic_clock = DEFAULT_CLOCK;
|
||||
else
|
||||
piic->iic_clock = clock;
|
||||
|
||||
if (own == 0)
|
||||
piic->iic_own = DEFAULT_OWN;
|
||||
else
|
||||
piic->iic_own = own;
|
||||
|
||||
iic_ite_data.data = (void *)piic;
|
||||
init_waitqueue_head(&iic_wait);
|
||||
spin_lock_init(&lock);
|
||||
if (iic_hw_resrc_init() == 0) {
|
||||
if (i2c_iic_add_bus(&iic_ite_ops) < 0)
|
||||
return -ENODEV;
|
||||
} else {
|
||||
return -ENODEV;
|
||||
}
|
||||
printk(KERN_INFO " found device at %#x irq %d.\n",
|
||||
piic->iic_base, piic->iic_irq);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static void iic_ite_exit(void)
|
||||
{
|
||||
i2c_iic_del_bus(&iic_ite_ops);
|
||||
iic_ite_release();
|
||||
}
|
||||
|
||||
/* If modules is NOT defined when this file is compiled, then the MODULE_*
|
||||
* macros will resolve to nothing
|
||||
*/
|
||||
MODULE_AUTHOR("MontaVista Software <www.mvista.com>");
|
||||
MODULE_DESCRIPTION("I2C-Bus adapter routines for ITE IIC bus adapter");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
module_param(base, int, 0);
|
||||
module_param(irq, int, 0);
|
||||
module_param(clock, int, 0);
|
||||
module_param(own, int, 0);
|
||||
|
||||
|
||||
/* Called when module is loaded or when kernel is initialized.
|
||||
* If MODULES is defined when this file is compiled, then this function will
|
||||
* resolve to init_module (the function called when insmod is invoked for a
|
||||
* module). Otherwise, this function is called early in the boot, when the
|
||||
* kernel is intialized. Check out /include/init.h to see how this works.
|
||||
*/
|
||||
module_init(iic_ite_init);
|
||||
|
||||
/* Resolves to module_cleanup when MODULES is defined. */
|
||||
module_exit(iic_ite_exit);
|
||||
|
|
@ -1,72 +0,0 @@
|
|||
/* ------------------------------------------------------------------------- */
|
||||
/* i2c-algo-ite.h i2c driver algorithms for ITE 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, 2001
|
||||
Changes made to support the ITE IIC peripheral */
|
||||
|
||||
|
||||
#ifndef I2C_ALGO_ITE_H
|
||||
#define I2C_ALGO_ITE_H 1
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
/* Example of a sequential read request:
|
||||
struct i2c_iic_msg s_msg;
|
||||
|
||||
s_msg.addr=device_address;
|
||||
s_msg.len=length;
|
||||
s_msg.buf=buffer;
|
||||
s_msg.waddr=word_address;
|
||||
ioctl(file,I2C_SREAD, &s_msg);
|
||||
*/
|
||||
#define I2C_SREAD 0x780 /* SREAD ioctl command */
|
||||
|
||||
struct i2c_iic_msg {
|
||||
__u16 addr; /* device address */
|
||||
__u16 waddr; /* word address */
|
||||
short len; /* msg length */
|
||||
char *buf; /* pointer to msg data */
|
||||
};
|
||||
|
||||
#ifdef __KERNEL__
|
||||
struct i2c_adapter;
|
||||
|
||||
struct i2c_algo_iic_data {
|
||||
void *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);
|
||||
|
||||
/* local settings */
|
||||
int udelay;
|
||||
int mdelay;
|
||||
int timeout;
|
||||
};
|
||||
|
||||
int i2c_iic_add_bus(struct i2c_adapter *);
|
||||
int i2c_iic_del_bus(struct i2c_adapter *);
|
||||
#endif /* __KERNEL__ */
|
||||
#endif /* I2C_ALGO_ITE_H */
|
||||
|
|
@ -210,9 +210,6 @@
|
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/* --- MPC8xx PowerPC adapters */
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#define I2C_HW_MPC8XX_EPON 0x110000 /* Eponymous MPC8xx I2C adapter */
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/* --- ITE based algorithms */
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#define I2C_HW_I_IIC 0x080000 /* controller on the ITE */
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/* --- PowerPC on-chip adapters */
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#define I2C_HW_OCP 0x120000 /* IBM on-chip I2C adapter */
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