static irqreturn_t buttons_irq(int irq, void *dev_id)
{
struct pin_desc * pindesc = (struct pin_desc *)dev_id;
unsigned int pinval;
//read the values of pins
pinval = s3c2410_gpio_getpin(pindesc->pin);
if(pinval)
{
/*released*/
key_val = 0x80 | pindesc->key_val;
}
else
{
/*pressed*/
key_val = pindesc->key_val;
}
ev_press = 1;
wake_up_interruptible(&button_waitq);
return IRQ_RETVAL(IRQ_HANDLED);
}
static irqreturn_t buttons_irq(int irq, void *dev_id)
{
struct pin_desc *pindesc = (struct pin_desc *)dev_id;
unsigned int pinval;
//printk("pindesc->pin = %d\n", pindesc->pin);
pinval = s3c2410_gpio_getpin(pindesc->pin);
//printk("pinval = %d\n", pinval);
//printk("pindesc->key_val = %x\n", pindesc->key_val);
if(pinval) {
/* key is not pressed down */
keyval = 0x80 | pindesc->key_val;
}else {
/* key is pressed down */
keyval = pindesc->key_val;
}
ev_press = 1; /* 表示中断发生了 */
wake_up_interruptible(&button_waitq); /* 唤醒休眠的进程 */
kill_fasync(&button_async_queue, SIGIO, POLL_IN);
return IRQ_RETVAL(IRQ_HANDLED);
}
static void buttons_timer(unsigned long arg)
{
//获取当前按键资源的索引
int key = arg;
//获取当前按键引脚上的电平值来判断按键是按下还是抬起
int up = s3c2410_gpio_getpin(button_irqs[key].pin);
if(!up)//低电平，按键按下
{
if(key_status[key] == KEY_UNCERTAIN)
{
// 标识当前按键状态为按下
key_status[key] = KEY_DOWN;
//标识当前按键已按下并唤醒等待队列
ev_press = 1;
wake_up_interruptible(&button_waitq);
}
//设置当前按键抬起去抖定时器的延时并启动定时器
key_timers[key].expires = jiffies + KEY_TIMER_DELAY2;
add_timer(&key_timers[key]);
}
else//高电平，按键抬起
{
//标识当前按键状态为抬起
key_status[key] = KEY_UP;
}
}
// Step 4 part3 上报 input_event
static void buttons_timer_function(unsigned long data)
{
struct pin_desc * pindesc = (struct pin_desc *) irq_pd;
unsigned int pinval;
if (!pindesc)
return ;
pinval = s3c2410_gpio_getpin(pindesc->pin); //读引脚值
if (pinval)
{
/* 松开 最后一个参数 0 表示松开，1表示按下*/
input_event(buttons_dev,EV_KEY, pindesc->key_val, 0); //上报事件
}
else
{
/* 按下 */
input_event(buttons_dev,EV_KEY, pindesc->key_val, 1);
}
ev_press = 1; /* 表示中断发生了 */
wake_up_interruptible(&button_waitq); /* 唤醒休眠的进程 */
kill_fasync (&button_async, SIGIO, POLL_IN);
}
irqreturn_t key_handler(int irq, void *dev_id)
{
unsigned int pinval;
/*
*读出引脚值，是按下或是松开,按下引脚是低电平，松开引脚是高电平
*/
// printk("key pressed..irq:%d\n", irq);
struct pin_des *ptr = (struct pin_des *)dev_id;
pinval = s3c2410_gpio_getpin(ptr->pin);
if(pinval)
{
/*松开,高电平*/
keyval = 0x80 | (ptr->pin_val);
}
else
{
/*按下,低电平*/
keyval = ptr->pin_val;
}
ev_press = 1;
wake_up_interruptible(&key_waitirq); //唤醒去read--->wait_up_interruptible--->copy_to_user
kill_fasync(&key_fasync, SIGIO, POLLIN);
return IRQ_HANDLED;
}
static irqreturn_t
rebis_keyevent(int irq, void *dev_id, struct pt_regs *regs)
{
struct rebis_key_detection *gd = (struct rebis_key_detection *) dev_id;
int state;
state = 1;
printk("gd= %x, keypad was pressed \n",(unsigned int)gd);
if (!gd)
return IRQ_HANDLED;
#if 1
state = s3c2410_gpio_getpin(gd->pin);
gd->last_state = state;
gprintk("%s gd %s\n\n", gd->name, state ? "high" : "low");
#endif
#if (EXAMPLE == 100)
schedule_work(&gd->gdetect);
#elif (EXAMPLE == 200)
tasklet_schedule(&gd->gdetect);
#endif
flag = 1;
wake_up_interruptible(&wq);
return IRQ_HANDLED;
}
static int glamo_irq_is_wired(void)
{
int rc;
int count = 0;
/*
* GTA02 S-Media IRQs prior to A5 are broken due to a lack of
* a pullup on the INT# line. Check for the bad behaviour.
*/
s3c2410_gpio_setpin(S3C2410_GPG4, 0);
s3c2410_gpio_cfgpin(S3C2410_GPG4, S3C2410_GPG4_OUTP);
s3c2410_gpio_cfgpin(S3C2410_GPG4, S3C2410_GPG4_INP);
/*
* we force it low ourselves for a moment and resume being input.
* If there is a pullup, it won't stay low for long. But if the
* level converter is there as on < A5 revision, the weak keeper
* on the input of the LC will hold the line low indefinitiely
*/
do
rc = s3c2410_gpio_getpin(S3C2410_GPG4);
while ((!rc) && ((count++) < 10));
if (rc) { /* it got pulled back up, it's good */
printk(KERN_INFO "Detected S-Media IRQ# pullup, "
"enabling interrupt\n");
return 0;
} else /* Gah we can't work with this level converter */
printk(KERN_WARNING "** Detected bad IRQ# circuit found"
" on pre-A5 GTA02: S-Media interrupt disabled **\n");
return -ENODEV;
}
static void buttons_timer_function(unsigned long data)
{
struct pin_desc * pindesc = irq_pd;
unsigned int pinval;
if (!pindesc)
return;
//printk("%s, %d\n", __FUNCTION__, __LINE__);
pinval = s3c2410_gpio_getpin(pindesc->pin);
if (pinval)
{
/* 松开 : 最后一个参数: 0-松开, 1-按下 */
input_event(buttons_input_dev, EV_KEY, pindesc->key_val, 0);
input_sync(buttons_input_dev);
//printk("in if input sync ok\n");
}
else
{
/* 按下 */
input_event(buttons_input_dev, EV_KEY, pindesc->key_val, 1);
input_sync(buttons_input_dev);
//printk("in else input sync ok\n");
}
}
/*
* 确定按键值
*/
static irqreturn_t buttons_irq(int irq, void *dev_id)
{
struct pin_desc * pindesc = (struct pin_desc *)dev_id;
unsigned int pinval;
pinval = s3c2410_gpio_getpin(pindesc->pin);
if (pinval)
{
/* 松开 */
key_val = 0x80 | pindesc->key_val;
}
else
{
/* 按下 */
key_val = pindesc->key_val;
}
ev_press = 1; /* 表示中断发生了 */
wake_up_interruptible(&button_waitq); /* 唤醒休眠的进程 */
kill_fasync (&button_async, SIGIO, POLL_IN);
return IRQ_RETVAL(IRQ_HANDLED);
}
static irqreturn_t buttons_irq(int irq, void *dev_id)
{
unsigned int value = 0;
pin_desc *pin_desc_temp = (pin_desc *)dev_id;
value = s3c2410_gpio_getpin(pin_desc_temp->pin);
if(value)
{
// release key
key_value = 0x80 | pin_desc_temp->key_val;
}
else
{
// press key
key_value = pin_desc_temp->key_val;
}
ev_press = 1; /* 表示中断发生了 */
wake_up_interruptible(&button_waitq); /* 唤醒休眠的进程 */
//printk("buttons_irq \n");
return IRQ_HANDLED;
}
static void buttons_timer_function(unsigned long data)
{
struct pin_desc * pindesc = irq_pd;
unsigned int pinval;
if (!pindesc)
return;
pinval = s3c2410_gpio_getpin(pindesc->pin);
if (pinval)
{
/* 松开 */
key_val = 0x80 | pindesc->key_val;
}
else
{
/* 按下 */
key_val = pindesc->key_val;
}
ev_press = 1; /* 表示中断发生了 */
wake_up_interruptible(&button_waitq); /* 唤醒休眠的进程 */
kill_fasync (&button_async, SIGIO, POLL_IN);
}
static int rx3000_serial_resume(struct platform_device *pdev)
{
enable_irq(IRQ_EINT6);
if (s3c2410_gpio_getpin(S3C2410_GPF6))
rx3000_serial_power(1);
return 0;
}
static ssize_t bt_read(struct device *dev, struct device_attribute *attr,
char *buf)
{
int ret = 0;
if (!strcmp(attr->attr.name, "power_on")) {
if (s3c2410_gpio_getpin(GTA02_GPIO_BT_EN))
ret = 1;
} else if (!strcmp(attr->attr.name, "reset")) {
if (s3c2410_gpio_getpin(GTA02_GPIO_BT_EN) == 0)
ret = 1;
}
if (!ret) {
return strlcpy(buf, "0\n", 3);
} else {
return strlcpy(buf, "1\n", 3);
}
}
static int scan_input(void) {
if(((readl(S3C2410_GPFDAT) >> 3) & 0x1) != 0x1)
{
if(!s3c2410_gpio_getpin(S3C2410_GPF3))
return 2;
}
return 0;
}
static int s3cmci_get_ro(struct mmc_host *mmc)
{
struct s3cmci_host *host = mmc_priv(mmc);
if (host->pdata->gpio_wprotect == 0)
return 0;
return s3c2410_gpio_getpin(host->pdata->gpio_wprotect);
}
static irqreturn_t rx3000_serial_cable(int irq, void *dev_id)
{
int status;
status = s3c2410_gpio_getpin(S3C2410_GPF6);
rx3000_serial_power(status);
return IRQ_HANDLED;
}
static int gta02_bt_suspend(struct platform_device *pdev, pm_message_t state)
{
struct gta02_pm_bt_data *bt_data = dev_get_drvdata(&pdev->dev);
dev_dbg(&pdev->dev, DRVMSG ": suspending\n");
bt_data->pre_resume_state = s3c2410_gpio_getpin(GTA02_GPIO_BT_EN);
__gta02_pm_bt_toggle_radio(&pdev->dev, 0);
return 0;
}
static int s3cmci_card_present(struct s3cmci_host *host)
{
struct s3c24xx_mci_pdata *pdata = host->pdata;
int ret;
if (pdata->gpio_detect == 0)
return -ENOSYS;
ret = s3c2410_gpio_getpin(pdata->gpio_detect) ? 0 : 1;
return ret ^ pdata->detect_invert;
}
static void _get_hw_version(void)
{
_hw_version = 0;
// set version bit to input pullup
s3c2410_gpio_cfgpin(S3C2410_GPE7, S3C2410_GPE7_INP);
s3c2410_gpio_pullup(S3C2410_GPE7, 2);
s3c2410_gpio_cfgpin(S3C2410_GPE8, S3C2410_GPE8_INP);
s3c2410_gpio_pullup(S3C2410_GPE8, 2);
s3c2410_gpio_cfgpin(S3C2410_GPE9, S3C2410_GPE9_INP);
s3c2410_gpio_pullup(S3C2410_GPE9, 2);
s3c2410_gpio_cfgpin(S3C2410_GPE10, S3C2410_GPE9_INP);
s3c2410_gpio_pullup(S3C2410_GPE10, 2);
s3c2410_gpio_cfgpin(S3C2410_GPH6, S3C2410_GPH6_INP);
s3c2410_gpio_pullup(S3C2410_GPH6, 2);
_hw_version += (s3c2410_gpio_getpin(S3C2410_GPE7) ? 1 << 0 : 0);
_hw_version += (s3c2410_gpio_getpin(S3C2410_GPE8) ? 1 << 1 : 0);
_hw_version += (s3c2410_gpio_getpin(S3C2410_GPE9) ? 1 << 2 : 0);
_hw_version += (s3c2410_gpio_getpin(S3C2410_GPE10) ? 1 << 3 : 0);
_hw_version += (s3c2410_gpio_getpin(S3C2410_GPH6) ? 1 << 4 : 0);
// set version bit to disable pullup
s3c2410_gpio_pullup(S3C2410_GPE7, 0);
s3c2410_gpio_pullup(S3C2410_GPE8, 0);
s3c2410_gpio_pullup(S3C2410_GPE9, 0);
s3c2410_gpio_pullup(S3C2410_GPE10, 0);
s3c2410_gpio_pullup(S3C2410_GPH6, 0);
printk(KERN_INFO "CANOPUS H/W ver. 0x%x\n", _hw_version);
/* proc */
_proc_dir = create_proc_entry("hwversion", 0, NULL);
_proc_dir->read_proc = (read_proc_t *)_proc_hw_version;
_proc_dir->data = NULL;
}
static void button_timer_function(unsigned long dat)
{
unsigned int pinval;
pinval = s3c2410_gpio_getpin(p_btn_desc->pin);
if (!pinval){
input_report_key(button_dev, p_btn_desc->key_val, 1);
input_sync(button_dev);
}else{
input_report_key(button_dev, p_btn_desc->key_val, 0);
input_sync(button_dev);
//return;
}
}
static int gta02_gsm_resume(struct platform_device *pdev)
{
/* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
* don't need to do much here. */
/* Make sure that the kernel console on the serial port is still
* disabled. FIXME: resume ordering race with serial driver! */
if (gta02_gsm.con && s3c2410_gpio_getpin(GTA02_GPIO_MODEM_ON))
console_stop(gta02_gsm.con);
s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, gta02_gsm.gpio_ndl_gsm);
return 0;
}
static irqreturn_t
usb_simtec_ocirq(int irq, void *pw, struct pt_regs *regs)
{
struct s3c2410_hcd_info *info = (struct s3c2410_hcd_info *)pw;
if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) {
pr_debug("usb_simtec: over-current irq (oc detected)\n");
s3c2410_usb_report_oc(info, 3);
} else {
pr_debug("usb_simtec: over-current irq (oc cleared)\n");
s3c2410_usb_report_oc(info, 0);
}
return IRQ_HANDLED;
}
static irqreturn_t buttons_interrupt(int irq, void *dev_id)
{
struct button_irq_desc *button_irq = (struct button_irq_desc *)dev_id;
int down;
down = !s3c2410_gpio_getpin(button_irq->pin);
if (down != (key_values[button_irq->number] & 1)) {
/* printk(KERN_ALERT "key_values[button_irq->number] & 1 = %d\n", key_values[button_irq->number] & 1); */
key_values[button_irq->number] = '0' + down;
ev_press = 1;
wake_up_interruptible(&button_waitq);
}
return IRQ_RETVAL(IRQ_HANDLED);
}
static int s3cmci_get_ro(struct mmc_host *mmc)
{
struct s3cmci_host *host = mmc_priv(mmc);
struct s3c24xx_mci_pdata *pdata = host->pdata;
int ret;
if (pdata->gpio_wprotect == 0)
return 0;
ret = s3c2410_gpio_getpin(pdata->gpio_wprotect);
if (pdata->wprotect_invert)
ret = !ret;
return ret;
}
static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
char *buf)
{
if (!strcmp(attr->attr.name, "power_on")) {
if (pcf50633_gpio_get(gta02_pcf, PCF50633_GPIO2))
goto out_1;
} else if (!strcmp(attr->attr.name, "download")) {
if (!s3c2410_gpio_getpin(GTA02_GPIO_nDL_GSM))
goto out_1;
} else if (!strcmp(attr->attr.name, "flowcontrolled")) {
if (s3c2410_gpio_getcfg(S3C2410_GPH1) == S3C2410_GPIO_OUTPUT)
goto out_1;
}
return strlcpy(buf, "0\n", 3);
out_1:
return strlcpy(buf, "1\n", 3);
}
int gta02_get_pcb_revision(void)
{
int n;
int u = 0;
static unsigned long pinlist[] = {
GTA02_PCB_ID1_0,
GTA02_PCB_ID1_1,
GTA02_PCB_ID1_2,
GTA02_PCB_ID2_0,
GTA02_PCB_ID2_1,
};
static int pin_offset[] = {
0, 1, 2, 8, 9
};
for (n = 0 ; n < ARRAY_SIZE(pinlist); n++) {
/*
* set the PCB version GPIO to be pulled-down input
* force low briefly first
*/
s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_OUTPUT);
s3c2410_gpio_setpin(pinlist[n], 0);
/* misnomer: it is a pullDOWN in 2442 */
s3c2410_gpio_pullup(pinlist[n], 1);
s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_INPUT);
udelay(10);
if (s3c2410_gpio_getpin(pinlist[n]))
u |= 1 << pin_offset[n];
/*
* when not being interrogated, all of the revision GPIO
* are set to output HIGH without pulldown so no current flows
* if they are NC or pulled up.
*/
s3c2410_gpio_setpin(pinlist[n], 1);
s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_OUTPUT);
/* misnomer: it is a pullDOWN in 2442 */
s3c2410_gpio_pullup(pinlist[n], 0);
}
return u;
}
/*本按键驱动的中断服务程序*/
static irqreturn_t buttons_interrupt(int irq, void* dev_id) {
struct button_irq_desc* button_irqs = (struct button_irq_desc*)dev_id;
int down;
// udelay(0);
/*获取被按下的按键状态*/
down = !s3c2410_gpio_getpin(button_irqs->pin);
/*状态改变，按键被按下，从这句可以看出，当按键没有被按下的时候，寄存器的值为1(上拉)，但按键被按下的时候，寄存器对应的值为0*/
if (down != (key_values[button_irqs->number] & 1)) { // Changed
/*如果key1 被按下，则key_value[0]就变为’1’，对应的ASCII 码为31*/
key_values[button_irqs->number] = '0' + down;
ev_press = 1; /*设置中断标志为1*/
wake_up_interruptible(&button_waitq); /*唤醒等待队列*/
}
return IRQ_RETVAL(IRQ_HANDLED);
}
static void h1940_lcd_power_set(struct plat_lcd_data *pd,
unsigned int power)
{
int value;
if (!power) {
/* set to 3ec */
s3c2410_gpio_setpin(S3C2410_GPC(0), 0);
/* wait for 3ac */
do {
value = s3c2410_gpio_getpin(S3C2410_GPC(6));
} while (value);
/* set to 38c */
s3c2410_gpio_setpin(S3C2410_GPC(5), 0);
} else {
/* Set to 3ac */
s3c2410_gpio_setpin(S3C2410_GPC(5), 1);
/* Set to 3ad */
s3c2410_gpio_setpin(S3C2410_GPC(0), 1);
}
}
static irqreturn_t buttons_irq(int irq, void *dev_id)
{
struct pin_desc *pindesc = (struct pin_desc *)dev_id;
unsigned int pinval;
pinval = s3c2410_gpio_getpin(pindesc->pin);
if (pinval) {
key_val = 0x80 | pindesc->key_val;
} else {
key_val = pindesc->key_val;
}
ev_press = 1;
wake_up_interruptible(&button_waitq);
kill_fasync(&button_async, SIGIO, POLL_IN);
return IRQ_HANDLED;
}
/*
* 确定按键值
*/
static irqreturn_t buttons_irq(int irq, void *dev_id)
{
struct pin_desc * pindesc = (struct pin_desc *)dev_id;
unsigned int pinval;
pinval = s3c2410_gpio_getpin(pindesc->pin);
if (pinval)
{
/* 松开 */
key_val = 0x80 | pindesc->key_val;
}
else
{
/* 按下 */
key_val = pindesc->key_val;
}
ev_press = 1; /* ±íʾÖжϷ¢ÉúÁË */
wake_up_interruptible(&button_waitq); /* »½ÐÑÐÝÃߵĽø³Ì */
return IRQ_HANDLED;
}