diff options
Diffstat (limited to 'drivers/char/ite_gpio.c')
| -rw-r--r-- | drivers/char/ite_gpio.c | 419 |
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 cde562d..0000000 --- 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"); |
