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path: root/drivers/char/ite_gpio.c
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Diffstat (limited to 'drivers/char/ite_gpio.c')
-rw-r--r--drivers/char/ite_gpio.c419
1 files changed, 0 insertions, 419 deletions
diff --git a/drivers/char/ite_gpio.c b/drivers/char/ite_gpio.c
deleted file mode 100644
index cde562d70c4f..000000000000
--- a/drivers/char/ite_gpio.c
+++ /dev/null
@@ -1,419 +0,0 @@
-/*
- * FILE NAME ite_gpio.c
- *
- * BRIEF MODULE DESCRIPTION
- * API for ITE GPIO device.
- * Driver for ITE GPIO device.
- *
- * Author: MontaVista Software, Inc. <source@mvista.com>
- * Hai-Pao Fan <haipao@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.
- */
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <asm/uaccess.h>
-#include <asm/addrspace.h>
-#include <asm/it8172/it8172_int.h>
-#include <linux/sched.h>
-#include <linux/ite_gpio.h>
-
-#define ite_gpio_base 0x14013800
-
-#define ITE_GPADR (*(volatile __u8 *)(0x14013800 + KSEG1))
-#define ITE_GPBDR (*(volatile __u8 *)(0x14013808 + KSEG1))
-#define ITE_GPCDR (*(volatile __u8 *)(0x14013810 + KSEG1))
-#define ITE_GPACR (*(volatile __u16 *)(0x14013802 + KSEG1))
-#define ITE_GPBCR (*(volatile __u16 *)(0x1401380a + KSEG1))
-#define ITE_GPCCR (*(volatile __u16 *)(0x14013812 + KSEG1))
-#define ITE_GPAICR (*(volatile __u16 *)(0x14013804 + KSEG1))
-#define ITE_GPBICR (*(volatile __u16 *)(0x1401380c + KSEG1))
-#define ITE_GPCICR (*(volatile __u16 *)(0x14013814 + KSEG1))
-#define ITE_GPAISR (*(volatile __u8 *)(0x14013806 + KSEG1))
-#define ITE_GPBISR (*(volatile __u8 *)(0x1401380e + KSEG1))
-#define ITE_GPCISR (*(volatile __u8 *)(0x14013816 + KSEG1))
-#define ITE_GCR (*(volatile __u8 *)(0x14013818 + KSEG1))
-
-#define MAX_GPIO_LINE 21
-static int ite_gpio_irq=IT8172_GPIO_IRQ;
-
-static long ite_irq_counter[MAX_GPIO_LINE];
-wait_queue_head_t ite_gpio_wait[MAX_GPIO_LINE];
-static int ite_gpio_irq_pending[MAX_GPIO_LINE];
-
-static int ite_gpio_debug=0;
-#define DEB(x) if (ite_gpio_debug>=1) x
-
-int ite_gpio_in(__u32 device, __u32 mask, volatile __u32 *data)
-{
- DEB(printk("ite_gpio_in mask=0x%x\n",mask));
-
- switch (device) {
- case ITE_GPIO_PORTA:
- ITE_GPACR = (__u16)mask; /* 0xffff */
- *data = ITE_GPADR;
- break;
- case ITE_GPIO_PORTB:
- ITE_GPBCR = (__u16)mask; /* 0xffff */
- *data = ITE_GPBDR;
- break;
- case ITE_GPIO_PORTC:
- ITE_GPCCR = (__u16)mask; /* 0x03ff */
- *data = ITE_GPCDR;
- break;
- default:
- return -EFAULT;
- }
-
- return 0;
-}
-
-
-int ite_gpio_out(__u32 device, __u32 mask, __u32 data)
-{
- switch (device) {
- case ITE_GPIO_PORTA:
- ITE_GPACR = (__u16)mask; /* 0x5555 */
- ITE_GPADR = (__u8)data;
- break;
- case ITE_GPIO_PORTB:
- ITE_GPBCR = (__u16)mask; /* 0x5555 */
- ITE_GPBDR = (__u8)data;
- break;
- case ITE_GPIO_PORTC:
- ITE_GPCCR = (__u16)mask; /* 0x0155 */
- ITE_GPCDR = (__u8)data;
- break;
- default:
- return -EFAULT;
- }
-
- return 0;
-}
-
-int ite_gpio_int_ctrl(__u32 device, __u32 mask, __u32 data)
-{
- switch (device) {
- case ITE_GPIO_PORTA:
- ITE_GPAICR = (ITE_GPAICR & ~mask) | (data & mask);
- break;
- case ITE_GPIO_PORTB:
- ITE_GPBICR = (ITE_GPBICR & ~mask) | (data & mask);
- break;
- case ITE_GPIO_PORTC:
- ITE_GPCICR = (ITE_GPCICR & ~mask) | (data & mask);
- break;
- default:
- return -EFAULT;
- }
-
- return 0;
-}
-
-int ite_gpio_in_status(__u32 device, __u32 mask, volatile __u32 *data)
-{
- int ret=-1;
-
- if ((MAX_GPIO_LINE > *data) && (*data >= 0))
- ret=ite_gpio_irq_pending[*data];
-
- DEB(printk("ite_gpio_in_status %d ret=%d\n",*data, ret));
-
- switch (device) {
- case ITE_GPIO_PORTA:
- *data = ITE_GPAISR & mask;
- break;
- case ITE_GPIO_PORTB:
- *data = ITE_GPBISR & mask;
- break;
- case ITE_GPIO_PORTC:
- *data = ITE_GPCISR & mask;
- break;
- default:
- return -EFAULT;
- }
-
- return ret;
-}
-
-int ite_gpio_out_status(__u32 device, __u32 mask, __u32 data)
-{
- switch (device) {
- case ITE_GPIO_PORTA:
- ITE_GPAISR = (ITE_GPAISR & ~mask) | (data & mask);
- break;
- case ITE_GPIO_PORTB:
- ITE_GPBISR = (ITE_GPBISR & ~mask) | (data & mask);
- break;
- case ITE_GPIO_PORTC:
- ITE_GPCISR = (ITE_GPCISR & ~mask) | (data & mask);
- break;
- default:
- return -EFAULT;
- }
-
- return 0;
-}
-
-int ite_gpio_gen_ctrl(__u32 device, __u32 mask, __u32 data)
-{
- ITE_GCR = (ITE_GCR & ~mask) | (data & mask);
-
- return 0;
-}
-
-int ite_gpio_int_wait (__u32 device, __u32 mask, __u32 data)
-{
- int i,line=0, ret=0;
- unsigned long flags;
-
- switch (device) {
- case ITE_GPIO_PORTA:
- line = data & mask;
- break;
- case ITE_GPIO_PORTB:
- line = (data & mask) <<8;
- break;
- case ITE_GPIO_PORTC:
- line = (data & mask) <<16;
- break;
- }
- for (i=MAX_GPIO_LINE-1; i >= 0; i--) {
- if ( (line) & (1 << i))
- break;
- }
-
- DEB(printk("wait device=0x%d mask=0x%x data=0x%x index %d\n",
- device, mask, data, i));
-
- if (line & ~(1<<i))
- return -EFAULT;
-
- if (ite_gpio_irq_pending[i]==1)
- return -EFAULT;
-
- save_flags (flags);
- cli();
- ite_gpio_irq_pending[i] = 1;
- ret = interruptible_sleep_on_timeout(&ite_gpio_wait[i], 3*HZ);
- restore_flags (flags);
- ite_gpio_irq_pending[i] = 0;
-
- return ret;
-}
-
-EXPORT_SYMBOL(ite_gpio_in);
-EXPORT_SYMBOL(ite_gpio_out);
-EXPORT_SYMBOL(ite_gpio_int_ctrl);
-EXPORT_SYMBOL(ite_gpio_in_status);
-EXPORT_SYMBOL(ite_gpio_out_status);
-EXPORT_SYMBOL(ite_gpio_gen_ctrl);
-EXPORT_SYMBOL(ite_gpio_int_wait);
-
-static int ite_gpio_open(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-
-static int ite_gpio_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-
-static int ite_gpio_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- static struct ite_gpio_ioctl_data ioctl_data;
-
- if (copy_from_user(&ioctl_data, (struct ite_gpio_ioctl_data *)arg,
- sizeof(ioctl_data)))
- return -EFAULT;
- if ((ioctl_data.device < ITE_GPIO_PORTA) ||
- (ioctl_data.device > ITE_GPIO_PORTC) )
- return -EFAULT;
-
- switch(cmd) {
- case ITE_GPIO_IN:
- if (ite_gpio_in(ioctl_data.device, ioctl_data.mask,
- &ioctl_data.data))
- return -EFAULT;
-
- if (copy_to_user((struct ite_gpio_ioctl_data *)arg,
- &ioctl_data, sizeof(ioctl_data)))
- return -EFAULT;
- break;
-
- case ITE_GPIO_OUT:
- return ite_gpio_out(ioctl_data.device,
- ioctl_data.mask, ioctl_data.data);
- break;
-
- case ITE_GPIO_INT_CTRL:
- return ite_gpio_int_ctrl(ioctl_data.device,
- ioctl_data.mask, ioctl_data.data);
- break;
-
- case ITE_GPIO_IN_STATUS:
- if (ite_gpio_in_status(ioctl_data.device, ioctl_data.mask,
- &ioctl_data.data))
- return -EFAULT;
- if (copy_to_user((struct ite_gpio_ioctl_data *)arg,
- &ioctl_data, sizeof(ioctl_data)))
- return -EFAULT;
- break;
-
- case ITE_GPIO_OUT_STATUS:
- return ite_gpio_out_status(ioctl_data.device,
- ioctl_data.mask, ioctl_data.data);
- break;
-
- case ITE_GPIO_GEN_CTRL:
- return ite_gpio_gen_ctrl(ioctl_data.device,
- ioctl_data.mask, ioctl_data.data);
- break;
-
- case ITE_GPIO_INT_WAIT:
- return ite_gpio_int_wait(ioctl_data.device,
- ioctl_data.mask, ioctl_data.data);
- break;
-
- default:
- return -ENOIOCTLCMD;
-
- }
-
- return 0;
-}
-
-static void ite_gpio_irq_handler(int this_irq, void *dev_id,
- struct pt_regs *regs)
-{
- int i,line;
-
- line = ITE_GPCISR & 0x1f;
- for (i=4; i >=0; i--) {
- if ( line & (1 << i)) {
- ++ite_irq_counter[i+16];
- ite_gpio_irq_pending[i+16] = 2;
- wake_up_interruptible(&ite_gpio_wait[i+16]);
-
-DEB(printk("interrupt 0x%x %d\n", &ite_gpio_wait[i+16], i+16));
-
- ITE_GPCISR = ITE_GPCISR & (1<<i);
- return;
- }
- }
- line = ITE_GPBISR;
- for (i=7; i >= 0; i--) {
- if ( line & (1 << i)) {
- ++ite_irq_counter[i+8];
- ite_gpio_irq_pending[i+8] = 2;
- wake_up_interruptible(&ite_gpio_wait[i+8]);
-
-DEB(printk("interrupt 0x%x %d\n",ITE_GPBISR, i+8));
-
- ITE_GPBISR = ITE_GPBISR & (1<<i);
- return;
- }
- }
- line = ITE_GPAISR;
- for (i=7; i >= 0; i--) {
- if ( line & (1 << i)) {
- ++ite_irq_counter[i];
- ite_gpio_irq_pending[i] = 2;
- wake_up_interruptible(&ite_gpio_wait[i]);
-
-DEB(printk("interrupt 0x%x %d\n",ITE_GPAISR, i));
-
- ITE_GPAISR = ITE_GPAISR & (1<<i);
- return;
- }
- }
-}
-
-static const struct file_operations ite_gpio_fops = {
- .owner = THIS_MODULE,
- .ioctl = ite_gpio_ioctl,
- .open = ite_gpio_open,
- .release = ite_gpio_release,
-};
-
-static struct miscdevice ite_gpio_miscdev = {
- MISC_DYNAMIC_MINOR,
- "ite_gpio",
- &ite_gpio_fops
-};
-
-int __init ite_gpio_init(void)
-{
- int i;
-
- if (misc_register(&ite_gpio_miscdev))
- return -ENODEV;
-
- if (!request_region(ite_gpio_base, 0x1c, "ITE GPIO"))
- {
- misc_deregister(&ite_gpio_miscdev);
- return -EIO;
- }
-
- /* initialize registers */
- ITE_GPACR = 0xffff;
- ITE_GPBCR = 0xffff;
- ITE_GPCCR = 0xffff;
- ITE_GPAICR = 0x00ff;
- ITE_GPBICR = 0x00ff;
- ITE_GPCICR = 0x00ff;
- ITE_GCR = 0;
-
- for (i = 0; i < MAX_GPIO_LINE; i++) {
- ite_gpio_irq_pending[i]=0;
- init_waitqueue_head(&ite_gpio_wait[i]);
- }
-
- if (request_irq(ite_gpio_irq, ite_gpio_irq_handler, IRQF_SHARED, "gpio", 0) < 0) {
- misc_deregister(&ite_gpio_miscdev);
- release_region(ite_gpio_base, 0x1c);
- return 0;
- }
-
- printk("GPIO at 0x%x (irq = %d)\n", ite_gpio_base, ite_gpio_irq);
-
- return 0;
-}
-
-static void __exit ite_gpio_exit(void)
-{
- misc_deregister(&ite_gpio_miscdev);
-}
-
-module_init(ite_gpio_init);
-module_exit(ite_gpio_exit);
-
-MODULE_LICENSE("GPL");