forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
2.6 KiB
125 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
// |
|
// Copyright 2004-2005 Simtec Electronics |
|
// Ben Dooks <[email protected]> |
|
// |
|
// 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 "gpio-samsung.h" |
|
#include <mach/irqs.h> |
|
#include <asm/irq.h> |
|
|
|
#include <linux/platform_data/usb-ohci-s3c2410.h> |
|
#include "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; |
|
}
|
|
|