126 lines
2.6 KiB
C
Executable file
126 lines
2.6 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Copyright 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
|
|
|
|
#define DEBUG
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/list.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <mach/gpio-samsung.h>
|
|
#include <asm/irq.h>
|
|
|
|
#include <linux/platform_data/usb-ohci-s3c2410.h>
|
|
#include <plat/devs.h>
|
|
|
|
#include "bast.h"
|
|
#include "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])
|
|
gpio_set_value(S3C2410_GPB(4), 0);
|
|
else
|
|
gpio_set_value(S3C2410_GPB(4), 1);
|
|
}
|
|
|
|
static irqreturn_t
|
|
usb_simtec_ocirq(int irq, void *pw)
|
|
{
|
|
struct s3c2410_hcd_info *info = pw;
|
|
|
|
if (gpio_get_value(S3C2410_GPG(10)) == 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(BAST_IRQ_USBOC, usb_simtec_ocirq,
|
|
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(BAST_IRQ_USBOC, info);
|
|
}
|
|
}
|
|
|
|
static struct s3c2410_hcd_info usb_simtec_info __initdata = {
|
|
.port[0] = {
|
|
.flags = S3C_HCDFLG_USED
|
|
},
|
|
.port[1] = {
|
|
.flags = S3C_HCDFLG_USED
|
|
},
|
|
|
|
.power_control = usb_simtec_powercontrol,
|
|
.enable_oc = usb_simtec_enableoc,
|
|
};
|
|
|
|
|
|
int __init usb_simtec_init(void)
|
|
{
|
|
int ret;
|
|
|
|
printk("USB Power Control, Copyright 2004 Simtec Electronics\n");
|
|
|
|
ret = gpio_request(S3C2410_GPB(4), "USB power control");
|
|
if (ret < 0) {
|
|
pr_err("%s: failed to get GPB4\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
ret = gpio_request(S3C2410_GPG(10), "USB overcurrent");
|
|
if (ret < 0) {
|
|
pr_err("%s: failed to get GPG10\n", __func__);
|
|
gpio_free(S3C2410_GPB(4));
|
|
return ret;
|
|
}
|
|
|
|
/* turn power on */
|
|
gpio_direction_output(S3C2410_GPB(4), 1);
|
|
gpio_direction_input(S3C2410_GPG(10));
|
|
|
|
s3c_ohci_set_platdata(&usb_simtec_info);
|
|
return 0;
|
|
}
|