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120 lines
2.8 KiB
120 lines
2.8 KiB
/* linux/arch/arm/mach-s3c2410/usb-simtec.c
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*
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* Copyright (c) 2004,2005 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* http://www.simtec.co.uk/products/EB2410ITX/
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*
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* Simtec BAST and Thorcom VR1000 USB port support functions
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Modifications:
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* 14-Sep-2004 BJD Created
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* 18-Oct-2004 BJD Cleanups, and added code to report OC cleared
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* 09-Aug-2005 BJD Renamed s3c2410_report_oc to s3c2410_usb_report_oc
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* 09-Aug-2005 BJD Ports powered only if both are enabled
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*/
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#define DEBUG
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/timer.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include <asm/arch/bast-map.h>
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#include <asm/arch/bast-irq.h>
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#include <asm/arch/usb-control.h>
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#include <asm/arch/regs-gpio.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include "devs.h"
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#include "usb-simtec.h"
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/* control power and monitor over-current events on various Simtec
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* designed boards.
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*/
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static unsigned int power_state[2];
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static void
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usb_simtec_powercontrol(int port, int to)
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{
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pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
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power_state[port] = to;
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if (power_state[0] && power_state[1])
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s3c2410_gpio_setpin(S3C2410_GPB4, 0);
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else
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s3c2410_gpio_setpin(S3C2410_GPB4, 1);
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}
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static irqreturn_t
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usb_simtec_ocirq(int irq, void *pw, struct pt_regs *regs)
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{
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struct s3c2410_hcd_info *info = (struct s3c2410_hcd_info *)pw;
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if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) {
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pr_debug("usb_simtec: over-current irq (oc detected)\n");
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s3c2410_usb_report_oc(info, 3);
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} else {
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pr_debug("usb_simtec: over-current irq (oc cleared)\n");
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s3c2410_usb_report_oc(info, 0);
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}
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return IRQ_HANDLED;
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}
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static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
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{
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int ret;
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if (on) {
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ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, SA_INTERRUPT,
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"USB Over-current", info);
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if (ret != 0) {
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printk(KERN_ERR "failed to request usb oc irq\n");
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}
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set_irq_type(IRQ_USBOC, IRQT_BOTHEDGE);
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} else {
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free_irq(IRQ_USBOC, info);
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}
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}
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static struct s3c2410_hcd_info usb_simtec_info = {
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.port[0] = {
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.flags = S3C_HCDFLG_USED
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},
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.port[1] = {
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.flags = S3C_HCDFLG_USED
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},
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.power_control = usb_simtec_powercontrol,
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.enable_oc = usb_simtec_enableoc,
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};
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int usb_simtec_init(void)
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{
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printk("USB Power Control, (c) 2004 Simtec Electronics\n");
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s3c_device_usb.dev.platform_data = &usb_simtec_info;
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s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP);
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s3c2410_gpio_setpin(S3C2410_GPB4, 1);
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return 0;
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}
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