int s5p_hpd_open(struct inode *inode, struct file *file)
{
#ifdef USEEXTINT
#else
/* adjust the duration of HPD detection */
s5p_tv_clk_gate(true);
hdmi_on = true;
s5p_hdmi_hpd_gen();
s3c_gpio_cfgpin(S5PV2XX_GPH1(5), S5PV2XX_GPH1_5_HDMI_HPD);
s3c_gpio_setpull(S5PV2XX_GPH1(5), S3C_GPIO_PULL_UP);
s5p_hdmi_enable_interrupts(HDMI_IRQ_HPD_PLUG);
s5p_hdmi_enable_interrupts(HDMI_IRQ_HPD_UNPLUG);
#endif
return 0;
}
static int __init s5p_hpd_probe(struct platform_device *pdev)
{
if (misc_register(&hpd_misc_device)) {
printk(KERN_WARNING "Couldn't register device 10, %d.\n"
, HPD_MINOR);
return -EBUSY;
}
init_waitqueue_head(&hpd_struct.waitq);
spin_lock_init(&hpd_struct.lock);
atomic_set(&hpd_struct.state, -1);
#ifdef USEEXTINT
s3c_gpio_cfgpin(S5PV2XX_GPH1(5), S5PV2XX_GPH1_5_EXT_INT31_5);
s3c_gpio_setpull(S5PV2XX_GPH1(5), S3C_GPIO_PULL_UP);
if (gpio_get_value(S5PV2XX_GPH1(5)))
atomic_set(&hpd_struct.state, HPD_HI);
else
atomic_set(&hpd_struct.state, HPD_LO);
if (request_irq(IRQ_EINT13, s5p_hpd_irq_handler,
IRQF_DISABLED, "hpd", s5p_hpd_irq_handler)) {
printk(KERN_ERR "failed to install %s irq\n", "hpd");
misc_deregister(&hpd_misc_device);
return -EIO;
}
#else
/* must be checked */
s5p_hdmi_register_isr(s5p_hpd_irq_handler, (u8)HDMI_IRQ_HPD_PLUG);
s5p_hdmi_register_isr(s5p_hpd_irq_handler, (u8)HDMI_IRQ_HPD_UNPLUG);
#endif
return 0;
}
/*
* HPD interrupt handler
*
* Handles interrupt requests from HPD hardware.
* Handler changes value of internal variable and notifies waiting thread.
*/
irqreturn_t s5p_hpd_irq_handler(int irq)
{
#ifdef USEEXTINT
spin_lock_irq(&hpd_struct.lock);
if (gpio_get_value(S5PV2XX_GPH1(5)))
atomic_set(&hpd_struct.state, HPD_HI);
else
atomic_set(&hpd_struct.state, HPD_LO);
if (atomic_read(&hpd_struct.state))
set_irq_type(IRQ_EINT13, IRQ_TYPE_LEVEL_LOW);
else
set_irq_type(IRQ_EINT13, IRQ_TYPE_LEVEL_HIGH);
spin_unlock_irq(&hpd_struct.lock);
HPDIFPRINTK("hpd_status = %d\n", atomic_read(&hpd_struct.state));
#else
u8 flag;
int ret = IRQ_HANDLED;
/* read flag register */
flag = s5p_hdmi_get_interrupts();
/* is this our interrupt? */
if (!(flag & (1 << HDMI_IRQ_HPD_PLUG | 1 << HDMI_IRQ_HPD_UNPLUG))) {
ret = IRQ_NONE;
goto out;
}
/* workaround: ignore HPD IRQ caused by reseting HDCP engine */
if (s5p_hdmi_get_swhpd_status()) {
s5p_hdmi_swhpd_disable();
/* clear pending bit */
s5p_hdmi_clear_pending(HDMI_IRQ_HPD_UNPLUG);
s5p_hdmi_clear_pending(HDMI_IRQ_HPD_PLUG);
ret = IRQ_HANDLED;
goto out;
}
if (flag == (1 << HDMI_IRQ_HPD_PLUG | 1 << HDMI_IRQ_HPD_UNPLUG)) {
HPDIFPRINTK("HPD_HI && HPD_LO\n");
if (last_hpd_state == HPD_HI && s5p_hdmi_get_hpd_status())
flag = 1 << HDMI_IRQ_HPD_UNPLUG;
else
flag = 1 << HDMI_IRQ_HPD_PLUG;
}
if (flag & (1 << HDMI_IRQ_HPD_PLUG)) {
HPDIFPRINTK("HPD_HI\n");
/* clear pending bit */
s5p_hdmi_clear_pending(HDMI_IRQ_HPD_PLUG);
s5p_hdmi_clear_pending(HDMI_IRQ_HPD_UNPLUG);
atomic_set(&hpd_struct.state, HPD_HI);
/* workaround: enable HDMI_IRQ_HPD_UNPLUG interrupt */
s5p_hdmi_disable_interrupts(HDMI_IRQ_HPD_PLUG);
s5p_hdmi_enable_interrupts(HDMI_IRQ_HPD_UNPLUG);
last_hpd_state = HPD_HI;
wake_up_interruptible(&hpd_struct.waitq);
} else if (flag & (1 << HDMI_IRQ_HPD_UNPLUG)) {
HPDIFPRINTK("HPD_LO\n");
/* clear pending bit */
s5p_hdmi_clear_pending(HDMI_IRQ_HPD_PLUG);
s5p_hdmi_clear_pending(HDMI_IRQ_HPD_UNPLUG);
atomic_set(&hpd_struct.state, HPD_LO);
/* workaround: disable HDMI_IRQ_HPD_UNPLUG interrupt */
last_hpd_state = HPD_LO;
s5p_hdmi_disable_interrupts(HDMI_IRQ_HPD_UNPLUG);
s5p_hdmi_enable_interrupts(HDMI_IRQ_HPD_PLUG);
wake_up_interruptible(&hpd_struct.waitq);
}
#endif
out:
return IRQ_HANDLED;
}
.ngpio = S5PV2XX_GPIO_G3_NR,
.label = "GPG3",
},
}, {
.base = S5PV2XX_GPH0_BASE,
.config = &gpio_cfg_noint,
.chip = {
.base = S5PV2XX_GPH0(0),
.ngpio = S5PV2XX_GPIO_H0_NR,
.label = "GPH0",
},
}, {
.base = S5PV2XX_GPH1_BASE,
.config = &gpio_cfg_noint,
.chip = {
.base = S5PV2XX_GPH1(0),
.ngpio = S5PV2XX_GPIO_H1_NR,
.label = "GPH1",
},
}, {
.base = S5PV2XX_GPH2_BASE,
.config = &gpio_cfg_noint,
.chip = {
.base = S5PV2XX_GPH2(0),
.ngpio = S5PV2XX_GPIO_H2_NR,
.label = "GPH2",
},
}, {
.base = S5PV2XX_GPH3_BASE,
.config = &gpio_cfg_noint,
.chip = {
