| /* 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 <linux/io.h> |
| |
| #include <asm/mach/arch.h> |
| #include <asm/mach/map.h> |
| #include <asm/mach/irq.h> |
| |
| #include <mach/bast-map.h> |
| #include <mach/bast-irq.h> |
| #include <mach/usb-control.h> |
| #include <mach/regs-gpio.h> |
| |
| #include <mach/hardware.h> |
| #include <asm/irq.h> |
| |
| #include <plat/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; |
| } |