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346 lines
7.3 KiB
346 lines
7.3 KiB
/*
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* arch/sh/boards/landisk/landisk_pwb.c -- driver for the Power control switch.
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*
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* This driver will also support the I-O DATA Device, Inc. LANDISK Board.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copylight (C) 2002 Atom Create Engineering Co., Ltd.
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*
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* LED control drive function added by kogiidena
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/signal.h>
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#include <linux/major.h>
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#include <linux/poll.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <asm/landisk/iodata_landisk.h>
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#define SHUTDOWN_BTN_MINOR 1 /* Shutdown button device minor no. */
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#define LED_MINOR 21 /* LED minor no. */
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#define BTN_MINOR 22 /* BUTTON minor no. */
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#define GIO_MINOR 40 /* GIO minor no. */
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static int openCnt;
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static int openCntLED;
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static int openCntGio;
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static int openCntBtn;
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static int landisk_btn;
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static int landisk_btnctrlpid;
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/*
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* Functions prototypes
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*/
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static int gio_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
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unsigned long arg);
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static int swdrv_open(struct inode *inode, struct file *filp)
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{
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int minor;
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minor = MINOR(inode->i_rdev);
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filp->private_data = (void *)minor;
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if (minor == SHUTDOWN_BTN_MINOR) {
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if (openCnt > 0) {
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return -EALREADY;
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} else {
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openCnt++;
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return 0;
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}
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} else if (minor == LED_MINOR) {
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if (openCntLED > 0) {
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return -EALREADY;
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} else {
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openCntLED++;
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return 0;
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}
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} else if (minor == BTN_MINOR) {
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if (openCntBtn > 0) {
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return -EALREADY;
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} else {
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openCntBtn++;
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return 0;
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}
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} else if (minor == GIO_MINOR) {
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if (openCntGio > 0) {
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return -EALREADY;
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} else {
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openCntGio++;
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return 0;
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}
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}
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return -ENOENT;
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}
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static int swdrv_close(struct inode *inode, struct file *filp)
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{
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int minor;
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minor = MINOR(inode->i_rdev);
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if (minor == SHUTDOWN_BTN_MINOR) {
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openCnt--;
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} else if (minor == LED_MINOR) {
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openCntLED--;
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} else if (minor == BTN_MINOR) {
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openCntBtn--;
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} else if (minor == GIO_MINOR) {
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openCntGio--;
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}
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return 0;
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}
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static int swdrv_read(struct file *filp, char *buff, size_t count,
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loff_t * ppos)
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{
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int minor;
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minor = (int)(filp->private_data);
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if (!access_ok(VERIFY_WRITE, (void *)buff, count))
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return -EFAULT;
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if (minor == SHUTDOWN_BTN_MINOR) {
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if (landisk_btn & 0x10) {
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put_user(1, buff);
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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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}
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return 0;
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}
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static int swdrv_write(struct file *filp, const char *buff, size_t count,
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loff_t * ppos)
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{
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int minor;
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minor = (int)(filp->private_data);
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if (minor == SHUTDOWN_BTN_MINOR) {
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return count;
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}
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return count;
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}
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static irqreturn_t sw_interrupt(int irq, void *dev_id)
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{
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landisk_btn = (0x0ff & (~ctrl_inb(PA_STATUS)));
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disable_irq(IRQ_BUTTON);
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disable_irq(IRQ_POWER);
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ctrl_outb(0x00, PA_PWRINT_CLR);
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if (landisk_btnctrlpid != 0) {
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kill_proc(landisk_btnctrlpid, SIGUSR1, 1);
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landisk_btnctrlpid = 0;
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}
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return IRQ_HANDLED;
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}
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static const struct file_operations swdrv_fops = {
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.read = swdrv_read, /* read */
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.write = swdrv_write, /* write */
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.open = swdrv_open, /* open */
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.release = swdrv_close, /* release */
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.ioctl = gio_ioctl, /* ioctl */
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};
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static char banner[] __initdata =
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KERN_INFO "LANDISK and USL-5P Button, LED and GIO driver initialized\n";
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int __init swdrv_init(void)
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{
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int error;
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printk("%s", banner);
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openCnt = 0;
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openCntLED = 0;
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openCntBtn = 0;
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openCntGio = 0;
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landisk_btn = 0;
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landisk_btnctrlpid = 0;
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if ((error = register_chrdev(SHUTDOWN_BTN_MAJOR, "swdrv", &swdrv_fops))) {
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printk(KERN_ERR
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"Button, LED and GIO driver:Couldn't register driver, error=%d\n",
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error);
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return 1;
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}
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if (request_irq(IRQ_POWER, sw_interrupt, 0, "SHUTDOWNSWITCH", NULL)) {
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printk(KERN_ERR "Unable to get IRQ 11.\n");
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return 1;
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}
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if (request_irq(IRQ_BUTTON, sw_interrupt, 0, "USL-5P BUTTON", NULL)) {
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printk(KERN_ERR "Unable to get IRQ 12.\n");
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return 1;
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}
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ctrl_outb(0x00, PA_PWRINT_CLR);
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return 0;
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}
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module_init(swdrv_init);
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/*
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* gio driver
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*
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*/
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#include <asm/landisk/gio.h>
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static int gio_ioctl(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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int minor;
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unsigned int data, mask;
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static unsigned int addr = 0;
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minor = (int)(filp->private_data);
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/* access control */
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if (minor == GIO_MINOR) {
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;
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} else if (minor == LED_MINOR) {
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if (((cmd & 0x0ff) >= 9) && ((cmd & 0x0ff) < 20)) {
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;
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} else {
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return -EINVAL;
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}
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} else if (minor == BTN_MINOR) {
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if (((cmd & 0x0ff) >= 20) && ((cmd & 0x0ff) < 30)) {
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;
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} else {
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return -EINVAL;
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}
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} else {
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return -EINVAL;
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}
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if (cmd & 0x01) { /* write */
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if (copy_from_user(&data, (int *)arg, sizeof(int))) {
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return -EFAULT;
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}
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}
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switch (cmd) {
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case GIODRV_IOCSGIOSETADDR: /* addres set */
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addr = data;
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break;
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case GIODRV_IOCSGIODATA1: /* write byte */
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ctrl_outb((unsigned char)(0x0ff & data), addr);
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break;
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case GIODRV_IOCSGIODATA2: /* write word */
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if (addr & 0x01) {
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return -EFAULT;
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}
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ctrl_outw((unsigned short int)(0x0ffff & data), addr);
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break;
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case GIODRV_IOCSGIODATA4: /* write long */
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if (addr & 0x03) {
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return -EFAULT;
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}
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ctrl_outl(data, addr);
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break;
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case GIODRV_IOCGGIODATA1: /* read byte */
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data = ctrl_inb(addr);
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break;
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case GIODRV_IOCGGIODATA2: /* read word */
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if (addr & 0x01) {
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return -EFAULT;
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}
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data = ctrl_inw(addr);
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break;
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case GIODRV_IOCGGIODATA4: /* read long */
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if (addr & 0x03) {
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return -EFAULT;
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}
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data = ctrl_inl(addr);
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break;
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case GIODRV_IOCSGIO_LED: /* write */
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mask = ((data & 0x00ffffff) << 8)
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| ((data & 0x0000ffff) << 16)
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| ((data & 0x000000ff) << 24);
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landisk_ledparam = data & (~mask);
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if (landisk_arch == 0) { /* arch == landisk */
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landisk_ledparam &= 0x03030303;
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mask = (~(landisk_ledparam >> 22)) & 0x000c;
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landisk_ledparam |= mask;
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} else { /* arch == usl-5p */
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mask = (landisk_ledparam >> 24) & 0x0001;
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landisk_ledparam |= mask;
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landisk_ledparam &= 0x007f7f7f;
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}
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landisk_ledparam |= 0x80;
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break;
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case GIODRV_IOCGGIO_LED: /* read */
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data = landisk_ledparam;
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if (landisk_arch == 0) { /* arch == landisk */
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data &= 0x03030303;
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} else { /* arch == usl-5p */
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;
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}
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data &= (~0x080);
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break;
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case GIODRV_IOCSGIO_BUZZER: /* write */
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landisk_buzzerparam = data;
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landisk_ledparam |= 0x80;
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break;
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case GIODRV_IOCGGIO_LANDISK: /* read */
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data = landisk_arch & 0x01;
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break;
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case GIODRV_IOCGGIO_BTN: /* read */
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data = (0x0ff & ctrl_inb(PA_PWRINT_CLR));
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data <<= 8;
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data |= (0x0ff & ctrl_inb(PA_IMASK));
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data <<= 8;
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data |= (0x0ff & landisk_btn);
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data <<= 8;
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data |= (0x0ff & (~ctrl_inb(PA_STATUS)));
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break;
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case GIODRV_IOCSGIO_BTNPID: /* write */
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landisk_btnctrlpid = data;
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landisk_btn = 0;
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if (irq_desc[IRQ_BUTTON].depth) {
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enable_irq(IRQ_BUTTON);
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}
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if (irq_desc[IRQ_POWER].depth) {
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enable_irq(IRQ_POWER);
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}
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break;
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case GIODRV_IOCGGIO_BTNPID: /* read */
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data = landisk_btnctrlpid;
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break;
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default:
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return -EFAULT;
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break;
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}
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if ((cmd & 0x01) == 0) { /* read */
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if (copy_to_user((int *)arg, &data, sizeof(int))) {
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return -EFAULT;
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}
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}
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return 0;
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}
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