[mirror_ubuntu-bionic-kernel.git] / arch / arm / mach-s3c2410 / usb-simtec.c

/* linux/arch/arm/mach-s3c2410/usb-simtec.c
 *
 * Copyright (c) 2004,2005 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.
*/

#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 <linux/io.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <mach/bast-map.h>
#include <mach/bast-irq.h>
#include <mach/regs-gpio.h>

#include <mach/hardware.h>
#include <asm/irq.h>

#include <plat/usb-control.h>
#include <plat/devs.h>

#include "usb-simtec.h"

/* control power and monitor over-current events on various Simtec
 * designed boards.
*/

static unsigned int power_state[2];

static void
usb_simtec_powercontrol(int port, int to)
{
	pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);

	power_state[port] = to;

	if (power_state[0] && power_state[1])
		s3c2410_gpio_setpin(S3C2410_GPB4, 0);
	else
		s3c2410_gpio_setpin(S3C2410_GPB4, 1);
}

static irqreturn_t
usb_simtec_ocirq(int irq, void *pw)
{
	struct s3c2410_hcd_info *info = pw;

	if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) {
		pr_debug("usb_simtec: over-current irq (oc detected)\n");
		s3c2410_usb_report_oc(info, 3);
	} else {
		pr_debug("usb_simtec: over-current irq (oc cleared)\n");
		s3c2410_usb_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,
				  IRQF_DISABLED | IRQF_TRIGGER_RISING |
				   IRQF_TRIGGER_FALLING,
				  "USB Over-current", info);
		if (ret != 0) {
			printk(KERN_ERR "failed to request usb oc irq\n");
		}
	} 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;
}
Commit	Line	Data
1da177e4 LT	1	/* linux/arch/arm/mach-s3c2410/usb-simtec.c
1da177e4 LT	2	*
484ae6bd	3	* Copyright (c) 2004,2005 Simtec Electronics
1da177e4 LT	4	* Ben Dooks <ben@simtec.co.uk>
	5	*
	6	* http://www.simtec.co.uk/products/EB2410ITX/
	7	*
	8	* Simtec BAST and Thorcom VR1000 USB port support functions
	9	*
	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.
1da177e4 LT	13	*/
	14
	15	#define DEBUG
	16
	17	#include <linux/kernel.h>
	18	#include <linux/types.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/list.h>
	21	#include <linux/timer.h>
	22	#include <linux/init.h>
	23	#include <linux/device.h>
fced80c7	24	#include <linux/io.h>
1da177e4 LT	25
	26	#include <asm/mach/arch.h>
	27	#include <asm/mach/map.h>
	28	#include <asm/mach/irq.h>
	29
a09e64fb RK	30	#include <mach/bast-map.h>
a09e64fb RK	31	#include <mach/bast-irq.h>
a09e64fb	32	#include <mach/regs-gpio.h>
1da177e4	33
a09e64fb	34	#include <mach/hardware.h>
1da177e4	35	#include <asm/irq.h>
1da177e4	36
49121aa1	37	#include <plat/usb-control.h>
a2b7ba9c	38	#include <plat/devs.h>
49121aa1	39
1da177e4 LT	40	#include "usb-simtec.h"
	41
	42	/* control power and monitor over-current events on various Simtec
	43	* designed boards.
	44	*/
	45
484ae6bd BD	46	static unsigned int power_state[2];
484ae6bd BD	47
1da177e4 LT	48	static void
	49	usb_simtec_powercontrol(int port, int to)
	50	{
	51	pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
	52
484ae6bd BD	53	power_state[port] = to;
	54
	55	if (power_state[0] && power_state[1])
	56	s3c2410_gpio_setpin(S3C2410_GPB4, 0);
	57	else
	58	s3c2410_gpio_setpin(S3C2410_GPB4, 1);
1da177e4 LT	59	}
	60
	61	static irqreturn_t
0cd61b68	62	usb_simtec_ocirq(int irq, void *pw)
1da177e4	63	{
2a7057e3	64	struct s3c2410_hcd_info *info = pw;
1da177e4 LT	65
	66	if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) {
	67	pr_debug("usb_simtec: over-current irq (oc detected)\n");
484ae6bd	68	s3c2410_usb_report_oc(info, 3);
1da177e4 LT	69	} else {
1da177e4 LT	70	pr_debug("usb_simtec: over-current irq (oc cleared)\n");
484ae6bd	71	s3c2410_usb_report_oc(info, 0);
1da177e4 LT	72	}
	73
	74	return IRQ_HANDLED;
	75	}
	76
	77	static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
	78	{
	79	int ret;
	80
	81	if (on) {
9ded96f2	82	ret = request_irq(IRQ_USBOC, usb_simtec_ocirq,
52e405ea TG	83	IRQF_DISABLED \| IRQF_TRIGGER_RISING \|
52e405ea TG	84	IRQF_TRIGGER_FALLING,
1da177e4 LT	85	"USB Over-current", info);
	86	if (ret != 0) {
	87	printk(KERN_ERR "failed to request usb oc irq\n");
	88	}
1da177e4 LT	89	} else {
	90	free_irq(IRQ_USBOC, info);
	91	}
	92	}
	93
	94	static struct s3c2410_hcd_info usb_simtec_info = {
	95	.port[0] = {
	96	.flags = S3C_HCDFLG_USED
	97	},
	98	.port[1] = {
	99	.flags = S3C_HCDFLG_USED
	100	},
	101
	102	.power_control = usb_simtec_powercontrol,
	103	.enable_oc = usb_simtec_enableoc,
	104	};
	105
	106
	107	int usb_simtec_init(void)
	108	{
	109	printk("USB Power Control, (c) 2004 Simtec Electronics\n");
	110	s3c_device_usb.dev.platform_data = &usb_simtec_info;
	111
	112	s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP);
	113	s3c2410_gpio_setpin(S3C2410_GPB4, 1);
	114	return 0;
	115	}