forked from Minki/linux
2a7057e306
mostly in and around irq handlers. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/* linux/arch/arm/mach-s3c2410/usb-simtec.c
|
|
*
|
|
* Copyright (c) 2004,2005 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* http://www.simtec.co.uk/products/EB2410ITX/
|
|
*
|
|
* Simtec BAST and Thorcom VR1000 USB port support functions
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#define DEBUG
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/list.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
|
|
#include <asm/arch/bast-map.h>
|
|
#include <asm/arch/bast-irq.h>
|
|
#include <asm/arch/usb-control.h>
|
|
#include <asm/arch/regs-gpio.h>
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
|
|
#include <asm/plat-s3c24xx/devs.h>
|
|
#include "usb-simtec.h"
|
|
|
|
/* control power and monitor over-current events on various Simtec
|
|
* designed boards.
|
|
*/
|
|
|
|
static unsigned int power_state[2];
|
|
|
|
static void
|
|
usb_simtec_powercontrol(int port, int to)
|
|
{
|
|
pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
|
|
|
|
power_state[port] = to;
|
|
|
|
if (power_state[0] && power_state[1])
|
|
s3c2410_gpio_setpin(S3C2410_GPB4, 0);
|
|
else
|
|
s3c2410_gpio_setpin(S3C2410_GPB4, 1);
|
|
}
|
|
|
|
static irqreturn_t
|
|
usb_simtec_ocirq(int irq, void *pw)
|
|
{
|
|
struct s3c2410_hcd_info *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 void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
|
|
{
|
|
int ret;
|
|
|
|
if (on) {
|
|
ret = request_irq(IRQ_USBOC, usb_simtec_ocirq,
|
|
IRQF_DISABLED | IRQF_TRIGGER_RISING |
|
|
IRQF_TRIGGER_FALLING,
|
|
"USB Over-current", info);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "failed to request usb oc irq\n");
|
|
}
|
|
} else {
|
|
free_irq(IRQ_USBOC, info);
|
|
}
|
|
}
|
|
|
|
static struct s3c2410_hcd_info usb_simtec_info = {
|
|
.port[0] = {
|
|
.flags = S3C_HCDFLG_USED
|
|
},
|
|
.port[1] = {
|
|
.flags = S3C_HCDFLG_USED
|
|
},
|
|
|
|
.power_control = usb_simtec_powercontrol,
|
|
.enable_oc = usb_simtec_enableoc,
|
|
};
|
|
|
|
|
|
int usb_simtec_init(void)
|
|
{
|
|
printk("USB Power Control, (c) 2004 Simtec Electronics\n");
|
|
s3c_device_usb.dev.platform_data = &usb_simtec_info;
|
|
|
|
s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP);
|
|
s3c2410_gpio_setpin(S3C2410_GPB4, 1);
|
|
return 0;
|
|
}
|