1 /* linux/arch/arm/mach-s3c2410/usb-simtec.c
3 * Copyright (c) 2004 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
6 * http://www.simtec.co.uk/products/EB2410ITX/
8 * Simtec BAST and Thorcom VR1000 USB port support functions
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.
15 * 14-Sep-2004 BJD Created
20 #include <linux/kernel.h>
21 #include <linux/types.h>
22 #include <linux/interrupt.h>
23 #include <linux/list.h>
24 #include <linux/timer.h>
25 #include <linux/init.h>
26 #include <linux/device.h>
28 #include <asm/mach/arch.h>
29 #include <asm/mach/map.h>
30 #include <asm/mach/irq.h>
32 #include <asm/arch/bast-map.h>
33 #include <asm/arch/bast-irq.h>
34 #include <asm/arch/usb-control.h>
35 #include <asm/arch/regs-gpio.h>
37 #include <asm/hardware.h>
40 #include <asm/mach-types.h>
43 #include "usb-simtec.h"
45 /* control power and monitor over-current events on various Simtec
50 usb_simtec_powercontrol(int port, int to)
52 pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
55 s3c2410_gpio_setpin(S3C2410_GPB4, to ? 0:1);
56 pr_debug("GPBDAT now %08x\n", __raw_readl(S3C2410_GPBDAT));
61 usb_simtec_ocirq(int irq, void *pw, struct pt_regs *regs)
63 struct s3c2410_hcd_info *info = (struct s3c2410_hcd_info *)pw;
65 if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) {
66 pr_debug("usb_simtec: over-current irq (oc detected)\n");
67 s3c2410_report_oc(info, 3);
69 pr_debug("usb_simtec: over-current irq (oc cleared)\n");
75 static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
80 pr_debug("claiming usb overccurent\n");
81 ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, SA_INTERRUPT,
84 printk(KERN_ERR "failed to request usb oc irq\n");
87 set_irq_type(IRQ_USBOC, IRQT_BOTHEDGE);
89 free_irq(IRQ_USBOC, NULL);
93 static struct s3c2410_hcd_info usb_simtec_info = {
95 .flags = S3C_HCDFLG_USED
98 .flags = S3C_HCDFLG_USED
101 .power_control = usb_simtec_powercontrol,
102 .enable_oc = usb_simtec_enableoc,
106 int usb_simtec_init(void)
108 printk("USB Power Control, (c) 2004 Simtec Electronics\n");
109 s3c_device_usb.dev.platform_data = &usb_simtec_info;
111 s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP);
112 s3c2410_gpio_setpin(S3C2410_GPB4, 1);
114 pr_debug("GPB: CON=%08x, DAT=%08x\n",
115 __raw_readl(S3C2410_GPBCON), __raw_readl(S3C2410_GPBDAT));
118 s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST,
119 S3C2410_MISCCR_USBDEV);