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Diffstat (limited to 'arch/arm/mach-s3c2410/usb-simtec.c')
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diff --git a/arch/arm/mach-s3c2410/usb-simtec.c b/arch/arm/mach-s3c2410/usb-simtec.c
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+/* linux/arch/arm/mach-s3c2410/usb-simtec.c
+ *
+ * Copyright (c) 2004 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.
+ *
+ * Modifications:
+ * 14-Sep-2004 BJD Created
+ * 18-Oct-2004 BJD Cleanups, and added code to report OC cleared
+*/
+
+#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 <asm/mach-types.h>
+
+#include "devs.h"
+#include "usb-simtec.h"
+
+/* control power and monitor over-current events on various Simtec
+ * designed boards.
+*/
+
+static void
+usb_simtec_powercontrol(int port, int to)
+{
+ pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
+
+ if (port == 1)
+ s3c2410_gpio_setpin(S3C2410_GPB4, to ? 0:1);
+}
+
+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_report_oc(info, 3);
+ } else {
+ pr_debug("usb_simtec: over-current irq (oc cleared)\n");
+ s3c2410_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, SA_INTERRUPT,
+ "USB Over-current", info);
+ if (ret != 0) {
+ printk(KERN_ERR "failed to request usb oc irq\n");
+ }
+
+ set_irq_type(IRQ_USBOC, IRQT_BOTHEDGE);
+ } 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;
+}