1/* linux/arch/arm/mach-s3c2410/usb-simtec.c 2 * 3 * Copyright (c) 2004,2005 Simtec Electronics 4 * Ben Dooks <ben@simtec.co.uk> 5 * 6 * http://www.simtec.co.uk/products/EB2410ITX/ 7 * 8 * Simtec BAST and Thorcom VR1000 USB port support functions 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13*/ 14 15#define DEBUG 16 17#include <linux/kernel.h> 18#include <linux/types.h> 19#include <linux/interrupt.h> 20#include <linux/list.h> 21#include <linux/timer.h> 22#include <linux/init.h> 23#include <linux/device.h> 24 25#include <asm/mach/arch.h> 26#include <asm/mach/map.h> 27#include <asm/mach/irq.h> 28 29#include <asm/arch/bast-map.h> 30#include <asm/arch/bast-irq.h> 31#include <asm/arch/usb-control.h> 32#include <asm/arch/regs-gpio.h> 33 34#include <asm/hardware.h> 35#include <asm/io.h> 36#include <asm/irq.h> 37 38#include <asm/plat-s3c24xx/devs.h> 39#include "usb-simtec.h" 40 41/* control power and monitor over-current events on various Simtec 42 * designed boards. 43*/ 44 45static unsigned int power_state[2]; 46 47static void 48usb_simtec_powercontrol(int port, int to) 49{ 50 pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); 51 52 power_state[port] = to; 53 54 if (power_state[0] && power_state[1]) 55 s3c2410_gpio_setpin(S3C2410_GPB4, 0); 56 else 57 s3c2410_gpio_setpin(S3C2410_GPB4, 1); 58} 59 60static irqreturn_t 61usb_simtec_ocirq(int irq, void *pw) 62{ 63 struct s3c2410_hcd_info *info = (struct s3c2410_hcd_info *)pw; 64 65 if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) { 66 pr_debug("usb_simtec: over-current irq (oc detected)\n"); 67 s3c2410_usb_report_oc(info, 3); 68 } else { 69 pr_debug("usb_simtec: over-current irq (oc cleared)\n"); 70 s3c2410_usb_report_oc(info, 0); 71 } 72 73 return IRQ_HANDLED; 74} 75 76static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on) 77{ 78 int ret; 79 80 if (on) { 81 ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, 82 IRQF_DISABLED | IRQF_TRIGGER_RISING | 83 IRQF_TRIGGER_FALLING, 84 "USB Over-current", info); 85 if (ret != 0) { 86 printk(KERN_ERR "failed to request usb oc irq\n"); 87 } 88 } else { 89 free_irq(IRQ_USBOC, info); 90 } 91} 92 93static struct s3c2410_hcd_info usb_simtec_info = { 94 .port[0] = { 95 .flags = S3C_HCDFLG_USED 96 }, 97 .port[1] = { 98 .flags = S3C_HCDFLG_USED 99 }, 100 101 .power_control = usb_simtec_powercontrol, 102 .enable_oc = usb_simtec_enableoc, 103}; 104 105 106int usb_simtec_init(void) 107{ 108 printk("USB Power Control, (c) 2004 Simtec Electronics\n"); 109 s3c_device_usb.dev.platform_data = &usb_simtec_info; 110 111 s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP); 112 s3c2410_gpio_setpin(S3C2410_GPB4, 1); 113 return 0; 114} 115