URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [char/] [ite_gpio.c] - Blame information for rev 1765

Details | Compare with Previous | View Log


/*
 * 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 >= 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)
{
        unsigned int minor = MINOR(inode->i_rdev);
        if (minor != GPIO_MINOR)
                return -ENODEV;
 
#ifdef MODULE
        MOD_INC_USE_COUNT;
#endif
 
        return 0;
}
 
 
static int ite_gpio_release(struct inode *inode, struct file *file)
{
 
#ifdef MODULE
        MOD_DEC_USE_COUNT;
#endif
 
        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 struct file_operations ite_gpio_fops =
{
        owner:          THIS_MODULE,
        ioctl:          ite_gpio_ioctl,
        open:           ite_gpio_open,
        release:        ite_gpio_release,
};
 
/* GPIO_MINOR in include/linux/miscdevice.h */
static struct miscdevice ite_gpio_miscdev =
{
        GPIO_MINOR,
        "ite_gpio",
        &ite_gpio_fops
};
 
int __init ite_gpio_init(void)
{
        int i;
 
        misc_register(&ite_gpio_miscdev);
 
        if (check_region(ite_gpio_base, 0x1c) < 0 ) {
           return -ENODEV;
        } else {
           request_region(ite_gpio_base, 0x1c, "ITE GPIO");
        }
 
        /* 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, SA_SHIRQ, "gpio", 0) < 0)
                return 0;
        printk("GPIO at 0x%x (irq = %d)\n", ite_gpio_base, ite_gpio_irq);
 
        return 0;
}
 
void __exit ite_gpio_exit(void)
{
        misc_deregister(&ite_gpio_miscdev);
}
 
module_init(ite_gpio_init);
module_exit(ite_gpio_exit);
 
MODULE_LICENSE("GPL");

Browse

Tools

Subversion Repositories or1k

[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [char/] [ite_gpio.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`* FILE NAME ite_gpio.c`
3			`*`
4			`* BRIEF MODULE DESCRIPTION`
5			`* API for ITE GPIO device.`
6			`* Driver for ITE GPIO device.`
7			`*`
8			`* Author: MontaVista Software, Inc. <source@mvista.com>`
9			`* Hai-Pao Fan <haipao@mvista.com>`
10			`*`
11			`* Copyright 2001 MontaVista Software Inc.`
12			`*`
13			`* This program is free software; you can redistribute it and/or modify it`
14			`* under the terms of the GNU General Public License as published by the`
15			`* Free Software Foundation; either version 2 of the License, or (at your`
16			`* option) any later version.`
17			`*`
18			* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
19			`* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF`
20			`* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN`
21			`* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,`
22			`* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT`
23			`* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF`
24			`* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON`
25			`* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT`
26			`* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF`
27			`* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.`
28			`*`
29			`* You should have received a copy of the GNU General Public License along`
30			`* with this program; if not, write to the Free Software Foundation, Inc.,`
31			`* 675 Mass Ave, Cambridge, MA 02139, USA.`
32			`*/`
33			`#include <linux/module.h>`
34			`#include <linux/types.h>`
35			`#include <linux/kernel.h>`
36			`#include <linux/miscdevice.h>`
37			`#include <linux/init.h>`
38			`#include <linux/ioport.h>`
39			`#include <asm/uaccess.h>`
40			`#include <asm/addrspace.h>`
41			`#include <asm/it8172/it8172_int.h>`
42			`#include <linux/sched.h>`
43			`#include <linux/ite_gpio.h>`
44
45			`#define ite_gpio_base 0x14013800`
46
47			`#define ITE_GPADR ((volatile __u8 )(0x14013800 + KSEG1))`
48			`#define ITE_GPBDR ((volatile __u8 )(0x14013808 + KSEG1))`
49			`#define ITE_GPCDR ((volatile __u8 )(0x14013810 + KSEG1))`
50			`#define ITE_GPACR ((volatile __u16 )(0x14013802 + KSEG1))`
51			`#define ITE_GPBCR ((volatile __u16 )(0x1401380a + KSEG1))`
52			`#define ITE_GPCCR ((volatile __u16 )(0x14013812 + KSEG1))`
53			`#define ITE_GPAICR ((volatile __u16 )(0x14013804 + KSEG1))`
54			`#define ITE_GPBICR ((volatile __u16 )(0x1401380c + KSEG1))`
55			`#define ITE_GPCICR ((volatile __u16 )(0x14013814 + KSEG1))`
56			`#define ITE_GPAISR ((volatile __u8 )(0x14013806 + KSEG1))`
57			`#define ITE_GPBISR ((volatile __u8 )(0x1401380e + KSEG1))`
58			`#define ITE_GPCISR ((volatile __u8 )(0x14013816 + KSEG1))`
59			`#define ITE_GCR ((volatile __u8 )(0x14013818 + KSEG1))`
60
61			`#define MAX_GPIO_LINE 21`
62			`static int ite_gpio_irq=IT8172_GPIO_IRQ;`
63
64			`static long ite_irq_counter[MAX_GPIO_LINE];`
65			`wait_queue_head_t ite_gpio_wait[MAX_GPIO_LINE];`
66			`static int ite_gpio_irq_pending[MAX_GPIO_LINE];`
67
68			`static int ite_gpio_debug=0;`
69			`#define DEB(x) if (ite_gpio_debug>=1) x`
70
71			`int ite_gpio_in(__u32 device, __u32 mask, volatile __u32 *data)`
72			`{`
73			`DEB(printk("ite_gpio_in mask=0x%x\n",mask));`
74
75			`switch (device) {`
76			`case ITE_GPIO_PORTA:`
77			`ITE_GPACR = (__u16)mask; /* 0xffff */`
78			`*data = ITE_GPADR;`
79			`break;`
80			`case ITE_GPIO_PORTB:`
81			`ITE_GPBCR = (__u16)mask; /* 0xffff */`
82			`*data = ITE_GPBDR;`
83			`break;`
84			`case ITE_GPIO_PORTC:`
85			`ITE_GPCCR = (__u16)mask; /* 0x03ff */`
86			`*data = ITE_GPCDR;`
87			`break;`
88			`default:`
89			`return -EFAULT;`
90			`}`
91
92			`return 0;`
93			`}`
94
95
96			`int ite_gpio_out(__u32 device, __u32 mask, __u32 data)`
97			`{`
98			`switch (device) {`
99			`case ITE_GPIO_PORTA:`
100			`ITE_GPACR = (__u16)mask; /* 0x5555 */`
101			`ITE_GPADR = (__u8)data;`
102			`break;`
103			`case ITE_GPIO_PORTB:`
104			`ITE_GPBCR = (__u16)mask; /* 0x5555 */`
105			`ITE_GPBDR = (__u8)data;`
106			`break;`
107			`case ITE_GPIO_PORTC:`
108			`ITE_GPCCR = (__u16)mask; /* 0x0155 */`
109			`ITE_GPCDR = (__u8)data;`
110			`break;`
111			`default:`
112			`return -EFAULT;`
113			`}`
114
115			`return 0;`
116			`}`
117
118			`int ite_gpio_int_ctrl(__u32 device, __u32 mask, __u32 data)`
119			`{`
120			`switch (device) {`
121			`case ITE_GPIO_PORTA:`
122			`ITE_GPAICR = (ITE_GPAICR & ~mask) \| (data & mask);`
123			`break;`
124			`case ITE_GPIO_PORTB:`
125			`ITE_GPBICR = (ITE_GPBICR & ~mask) \| (data & mask);`
126			`break;`
127			`case ITE_GPIO_PORTC:`
128			`ITE_GPCICR = (ITE_GPCICR & ~mask) \| (data & mask);`
129			`break;`
130			`default:`
131			`return -EFAULT;`
132			`}`
133
134			`return 0;`
135			`}`
136
137			`int ite_gpio_in_status(__u32 device, __u32 mask, volatile __u32 *data)`
138			`{`
139			`int ret=-1;`
140
141			`if (MAX_GPIO_LINE > *data >= 0)`
142			`ret=ite_gpio_irq_pending[*data];`
143
144			`DEB(printk("ite_gpio_in_status %d ret=%d\n",*data, ret));`
145
146			`switch (device) {`
147			`case ITE_GPIO_PORTA:`
148			`*data = ITE_GPAISR & mask;`
149			`break;`
150			`case ITE_GPIO_PORTB:`
151			`*data = ITE_GPBISR & mask;`
152			`break;`
153			`case ITE_GPIO_PORTC:`
154			`*data = ITE_GPCISR & mask;`
155			`break;`
156			`default:`
157			`return -EFAULT;`
158			`}`
159
160			`return ret;`
161			`}`
162
163			`int ite_gpio_out_status(__u32 device, __u32 mask, __u32 data)`
164			`{`
165			`switch (device) {`
166			`case ITE_GPIO_PORTA:`
167			`ITE_GPAISR = (ITE_GPAISR & ~mask) \| (data & mask);`
168			`break;`
169			`case ITE_GPIO_PORTB:`
170			`ITE_GPBISR = (ITE_GPBISR & ~mask) \| (data & mask);`
171			`break;`
172			`case ITE_GPIO_PORTC:`
173			`ITE_GPCISR = (ITE_GPCISR & ~mask) \| (data & mask);`
174			`break;`
175			`default:`
176			`return -EFAULT;`
177			`}`
178
179			`return 0;`
180			`}`
181
182			`int ite_gpio_gen_ctrl(__u32 device, __u32 mask, __u32 data)`
183			`{`
184			`ITE_GCR = (ITE_GCR & ~mask) \| (data & mask);`
185
186			`return 0;`
187			`}`
188
189			`int ite_gpio_int_wait (__u32 device, __u32 mask, __u32 data)`
190			`{`
191			`int i,line=0, ret=0;`
192			`unsigned long flags;`
193
194			`switch (device) {`
195			`case ITE_GPIO_PORTA:`
196			`line = data & mask;`
197			`break;`
198			`case ITE_GPIO_PORTB:`
199			`line = (data & mask) <<8;`
200			`break;`
201			`case ITE_GPIO_PORTC:`
202			`line = (data & mask) <<16;`
203			`break;`
204			`}`
205			`for (i=MAX_GPIO_LINE-1; i >= 0; i--) {`
206			`if ( (line) & (1 << i))`
207			`break;`
208			`}`
209
210			`DEB(printk("wait device=0x%d mask=0x%x data=0x%x index %d\n",`
211			`device, mask, data, i));`
212
213			`if (line & ~(1<<i))`
214			`return -EFAULT;`
215
216			`if (ite_gpio_irq_pending[i]==1)`
217			`return -EFAULT;`
218
219			`save_flags (flags);`
220			`cli();`
221			`ite_gpio_irq_pending[i] = 1;`
222			`ret = interruptible_sleep_on_timeout(&ite_gpio_wait[i], 3*HZ);`
223			`restore_flags (flags);`
224			`ite_gpio_irq_pending[i] = 0;`
225
226			`return ret;`
227			`}`
228
229			`EXPORT_SYMBOL(ite_gpio_in);`
230			`EXPORT_SYMBOL(ite_gpio_out);`
231			`EXPORT_SYMBOL(ite_gpio_int_ctrl);`
232			`EXPORT_SYMBOL(ite_gpio_in_status);`
233			`EXPORT_SYMBOL(ite_gpio_out_status);`
234			`EXPORT_SYMBOL(ite_gpio_gen_ctrl);`
235			`EXPORT_SYMBOL(ite_gpio_int_wait);`
236
237			`static int ite_gpio_open(struct inode inode, struct file file)`
238			`{`
239			`unsigned int minor = MINOR(inode->i_rdev);`
240			`if (minor != GPIO_MINOR)`
241			`return -ENODEV;`
242
243			`#ifdef MODULE`
244			`MOD_INC_USE_COUNT;`
245			`#endif`
246
247			`return 0;`
248			`}`
249
250
251			`static int ite_gpio_release(struct inode inode, struct file file)`
252			`{`
253
254			`#ifdef MODULE`
255			`MOD_DEC_USE_COUNT;`
256			`#endif`
257
258			`return 0;`
259			`}`
260
261
262			`static int ite_gpio_ioctl(struct inode inode, struct file file,`
263			`unsigned int cmd, unsigned long arg)`
264			`{`
265
266			`static struct ite_gpio_ioctl_data ioctl_data;`
267
268			`if (copy_from_user(&ioctl_data, (struct ite_gpio_ioctl_data *)arg,`
269			`sizeof(ioctl_data)))`
270			`return -EFAULT;`
271			`if ((ioctl_data.device < ITE_GPIO_PORTA) \|\|`
272			`(ioctl_data.device > ITE_GPIO_PORTC) )`
273			`return -EFAULT;`
274
275			`switch(cmd) {`
276			`case ITE_GPIO_IN:`
277			`if (ite_gpio_in(ioctl_data.device, ioctl_data.mask,`
278			`&ioctl_data.data))`
279			`return -EFAULT;`
280
281			`if (copy_to_user((struct ite_gpio_ioctl_data *)arg,`
282			`&ioctl_data, sizeof(ioctl_data)))`
283			`return -EFAULT;`
284			`break;`
285
286			`case ITE_GPIO_OUT:`
287			`return ite_gpio_out(ioctl_data.device,`
288			`ioctl_data.mask, ioctl_data.data);`
289			`break;`
290
291			`case ITE_GPIO_INT_CTRL:`
292			`return ite_gpio_int_ctrl(ioctl_data.device,`
293			`ioctl_data.mask, ioctl_data.data);`
294			`break;`
295
296			`case ITE_GPIO_IN_STATUS:`
297			`if (ite_gpio_in_status(ioctl_data.device, ioctl_data.mask,`
298			`&ioctl_data.data))`
299			`return -EFAULT;`
300			`if (copy_to_user((struct ite_gpio_ioctl_data *)arg,`
301			`&ioctl_data, sizeof(ioctl_data)))`
302			`return -EFAULT;`
303			`break;`
304
305			`case ITE_GPIO_OUT_STATUS:`
306			`return ite_gpio_out_status(ioctl_data.device,`
307			`ioctl_data.mask, ioctl_data.data);`
308			`break;`
309
310			`case ITE_GPIO_GEN_CTRL:`
311			`return ite_gpio_gen_ctrl(ioctl_data.device,`
312			`ioctl_data.mask, ioctl_data.data);`
313			`break;`
314
315			`case ITE_GPIO_INT_WAIT:`
316			`return ite_gpio_int_wait(ioctl_data.device,`
317			`ioctl_data.mask, ioctl_data.data);`
318			`break;`
319
320			`default:`
321			`return -ENOIOCTLCMD;`
322
323			`}`
324			`return 0;`
325			`}`
326
327			`static void ite_gpio_irq_handler(int this_irq, void dev_id, struct pt_regs regs)`
328			`{`
329			`int i,line;`
330
331			`line = ITE_GPCISR & 0x1f;`
332			`for (i=4; i >=0; i--) {`
333			`if ( line & (1 << i)) {`
334			`++ite_irq_counter[i+16];`
335			`ite_gpio_irq_pending[i+16] = 2;`
336			`wake_up_interruptible(&ite_gpio_wait[i+16]);`
337
338			`DEB(printk("interrupt 0x%x %d\n", &ite_gpio_wait[i+16], i+16));`
339
340			`ITE_GPCISR = ITE_GPCISR & (1<<i);`
341			`return;`
342			`}`
343			`}`
344			`line = ITE_GPBISR;`
345			`for (i=7; i >= 0; i--) {`
346			`if ( line & (1 << i)) {`
347			`++ite_irq_counter[i+8];`
348			`ite_gpio_irq_pending[i+8] = 2;`
349			`wake_up_interruptible(&ite_gpio_wait[i+8]);`
350
351			`DEB(printk("interrupt 0x%x %d\n",ITE_GPBISR, i+8));`
352
353			`ITE_GPBISR = ITE_GPBISR & (1<<i);`
354			`return;`
355			`}`
356			`}`
357			`line = ITE_GPAISR;`
358			`for (i=7; i >= 0; i--) {`
359			`if ( line & (1 << i)) {`
360			`++ite_irq_counter[i];`
361			`ite_gpio_irq_pending[i] = 2;`
362			`wake_up_interruptible(&ite_gpio_wait[i]);`
363
364			`DEB(printk("interrupt 0x%x %d\n",ITE_GPAISR, i));`
365
366			`ITE_GPAISR = ITE_GPAISR & (1<<i);`
367			`return;`
368			`}`
369			`}`
370			`}`
371
372			`static struct file_operations ite_gpio_fops =`
373			`{`
374			`owner: THIS_MODULE,`
375			`ioctl: ite_gpio_ioctl,`
376			`open: ite_gpio_open,`
377			`release: ite_gpio_release,`
378			`};`
379
380			`/* GPIO_MINOR in include/linux/miscdevice.h */`
381			`static struct miscdevice ite_gpio_miscdev =`
382			`{`
383			`GPIO_MINOR,`
384			`"ite_gpio",`
385			`&ite_gpio_fops`
386			`};`
387
388			`int __init ite_gpio_init(void)`
389			`{`
390			`int i;`
391
392			`misc_register(&ite_gpio_miscdev);`
393
394			`if (check_region(ite_gpio_base, 0x1c) < 0 ) {`
395			`return -ENODEV;`
396			`} else {`
397			`request_region(ite_gpio_base, 0x1c, "ITE GPIO");`
398			`}`
399
400			`/* initialize registers */`
401			`ITE_GPACR = 0xffff;`
402			`ITE_GPBCR = 0xffff;`
403			`ITE_GPCCR = 0xffff;`
404			`ITE_GPAICR = 0x00ff;`
405			`ITE_GPBICR = 0x00ff;`
406			`ITE_GPCICR = 0x00ff;`
407			`ITE_GCR = 0;`
408
409			`for (i = 0; i < MAX_GPIO_LINE; i++) {`
410			`ite_gpio_irq_pending[i]=0;`
411			`init_waitqueue_head(&ite_gpio_wait[i]);`
412			`}`
413			`if (request_irq(ite_gpio_irq, ite_gpio_irq_handler, SA_SHIRQ, "gpio", 0) < 0)`
414			`return 0;`
415			`printk("GPIO at 0x%x (irq = %d)\n", ite_gpio_base, ite_gpio_irq);`
416
417			`return 0;`
418			`}`
419
420			`void __exit ite_gpio_exit(void)`
421			`{`
422			`misc_deregister(&ite_gpio_miscdev);`
423			`}`
424
425			`module_init(ite_gpio_init);`
426			`module_exit(ite_gpio_exit);`
427
428			`MODULE_LICENSE("GPL");`