1 /* linux/arch/arm/mach-s3c2410/usb-simtec.c
3 * Copyright 2004-2005 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.
17 #include <linux/kernel.h>
18 #include <linux/types.h>
19 #include <linux/interrupt.h>
20 #include <linux/list.h>
21 #include <linux/gpio.h>
22 #include <linux/timer.h>
23 #include <linux/init.h>
24 #include <linux/device.h>
27 #include <asm/mach/arch.h>
28 #include <asm/mach/map.h>
29 #include <asm/mach/irq.h>
31 #include <mach/bast-map.h>
32 #include <mach/bast-irq.h>
34 #include <mach/hardware.h>
37 #include <plat/usb-control.h>
38 #include <plat/devs.h>
40 #include "usb-simtec.h"
42 /* control power and monitor over-current events on various Simtec
46 static unsigned int power_state[2];
49 usb_simtec_powercontrol(int port, int to)
51 pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
53 power_state[port] = to;
55 if (power_state[0] && power_state[1])
56 gpio_set_value(S3C2410_GPB(4), 0);
58 gpio_set_value(S3C2410_GPB(4), 1);
62 usb_simtec_ocirq(int irq, void *pw)
64 struct s3c2410_hcd_info *info = pw;
66 if (gpio_get_value(S3C2410_GPG(10)) == 0) {
67 pr_debug("usb_simtec: over-current irq (oc detected)\n");
68 s3c2410_usb_report_oc(info, 3);
70 pr_debug("usb_simtec: over-current irq (oc cleared)\n");
71 s3c2410_usb_report_oc(info, 0);
77 static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
82 ret = request_irq(IRQ_USBOC, usb_simtec_ocirq,
83 IRQF_DISABLED | IRQF_TRIGGER_RISING |
85 "USB Over-current", info);
87 printk(KERN_ERR "failed to request usb oc irq\n");
90 free_irq(IRQ_USBOC, info);
94 static struct s3c2410_hcd_info usb_simtec_info __initdata = {
96 .flags = S3C_HCDFLG_USED
99 .flags = S3C_HCDFLG_USED
102 .power_control = usb_simtec_powercontrol,
103 .enable_oc = usb_simtec_enableoc,
107 int usb_simtec_init(void)
111 printk("USB Power Control, Copyright 2004 Simtec Electronics\n");
113 ret = gpio_request(S3C2410_GPB(4), "USB power control");
115 pr_err("%s: failed to get GPB4\n", __func__);
119 ret = gpio_request(S3C2410_GPG(10), "USB overcurrent");
121 pr_err("%s: failed to get GPG10\n", __func__);
122 gpio_free(S3C2410_GPB(4));
127 gpio_direction_output(S3C2410_GPB(4), 1);
128 gpio_direction_input(S3C2410_GPG(10));
130 s3c_ohci_set_platdata(&usb_simtec_info);