This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / arm / mach-s3c2410 / usb-simtec.c

diff --git a/arch/arm/mach-s3c2410/usb-simtec.c b/arch/arm/mach-s3c2410/usb-simtec.c
new file mode 100644 (file)
index 0000000..b8f8ded
--- /dev/null
+++ 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
+*/
+
+#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);
+               pr_debug("GPBDAT now %08x\n", __raw_readl(S3C2410_GPBDAT));
+       }
+}
+
+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");
+       }
+
+       return IRQ_HANDLED;
+}
+
+static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
+{
+       int ret;
+
+       if (on) {
+               pr_debug("claiming usb overccurent\n");
+               ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, SA_INTERRUPT,
+                                 "usb-oc", 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, NULL);
+       }
+}
+
+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);
+
+       pr_debug("GPB: CON=%08x, DAT=%08x\n",
+                __raw_readl(S3C2410_GPBCON), __raw_readl(S3C2410_GPBDAT));
+
+       if (0) {
+               s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST,
+                                     S3C2410_MISCCR_USBDEV);
+       }
+
+       return 0;
+}