1 // SPDX-License-Identifier: GPL-2.0
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
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14 #include <linux/interrupt.h>
15 #include <linux/list.h>
16 #include <linux/gpio.h>
17 #include <linux/timer.h>
18 #include <linux/init.h>
19 #include <linux/device.h>
22 #include <asm/mach/arch.h>
23 #include <asm/mach/map.h>
24 #include <asm/mach/irq.h>
26 #include <mach/hardware.h>
27 #include <mach/gpio-samsung.h>
30 #include <linux/platform_data/usb-ohci-s3c2410.h>
31 #include <plat/devs.h>
36 /* control power and monitor over-current events on various Simtec
40 static unsigned int power_state[2];
43 usb_simtec_powercontrol(int port, int to)
45 pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
47 power_state[port] = to;
49 if (power_state[0] && power_state[1])
50 gpio_set_value(S3C2410_GPB(4), 0);
52 gpio_set_value(S3C2410_GPB(4), 1);
56 usb_simtec_ocirq(int irq, void *pw)
58 struct s3c2410_hcd_info *info = pw;
60 if (gpio_get_value(S3C2410_GPG(10)) == 0) {
61 pr_debug("usb_simtec: over-current irq (oc detected)\n");
62 s3c2410_usb_report_oc(info, 3);
64 pr_debug("usb_simtec: over-current irq (oc cleared)\n");
65 s3c2410_usb_report_oc(info, 0);
71 static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
76 ret = request_irq(BAST_IRQ_USBOC, usb_simtec_ocirq,
77 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
78 "USB Over-current", info);
80 printk(KERN_ERR "failed to request usb oc irq\n");
83 free_irq(BAST_IRQ_USBOC, info);
87 static struct s3c2410_hcd_info usb_simtec_info __initdata = {
89 .flags = S3C_HCDFLG_USED
92 .flags = S3C_HCDFLG_USED
95 .power_control = usb_simtec_powercontrol,
96 .enable_oc = usb_simtec_enableoc,
100 int __init usb_simtec_init(void)
104 printk("USB Power Control, Copyright 2004 Simtec Electronics\n");
106 ret = gpio_request(S3C2410_GPB(4), "USB power control");
108 pr_err("%s: failed to get GPB4\n", __func__);
112 ret = gpio_request(S3C2410_GPG(10), "USB overcurrent");
114 pr_err("%s: failed to get GPG10\n", __func__);
115 gpio_free(S3C2410_GPB(4));
120 gpio_direction_output(S3C2410_GPB(4), 1);
121 gpio_direction_input(S3C2410_GPG(10));
123 s3c_ohci_set_platdata(&usb_simtec_info);