/* 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 "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 pt_regs *regs) { struct s3c2410_hcd_info *info = (struct s3c2410_hcd_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; }