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Diffstat (limited to 'drivers/i2c/busses/i2c-ite.c')
-rw-r--r--drivers/i2c/busses/i2c-ite.c278
1 files changed, 0 insertions, 278 deletions
diff --git a/drivers/i2c/busses/i2c-ite.c b/drivers/i2c/busses/i2c-ite.c
deleted file mode 100644
index f7d7186..0000000
--- a/drivers/i2c/busses/i2c-ite.c
+++ /dev/null
@@ -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);