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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* linux/arch/arm/mach-s3c2410/usb-simtec.c
2 *
Ben Dooks484ae6b2005-08-10 16:45:14 +01003 * Copyright (c) 2004,2005 Simtec Electronics
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013*/
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>
24
25#include <asm/mach/arch.h>
26#include <asm/mach/map.h>
27#include <asm/mach/irq.h>
28
29#include <asm/arch/bast-map.h>
30#include <asm/arch/bast-irq.h>
31#include <asm/arch/usb-control.h>
32#include <asm/arch/regs-gpio.h>
33
34#include <asm/hardware.h>
35#include <asm/io.h>
36#include <asm/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Ben Dooksa21765a2007-02-11 18:31:01 +010038#include <asm/plat-s3c24xx/devs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include "usb-simtec.h"
40
41/* control power and monitor over-current events on various Simtec
42 * designed boards.
43*/
44
Ben Dooks484ae6b2005-08-10 16:45:14 +010045static unsigned int power_state[2];
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047static void
48usb_simtec_powercontrol(int port, int to)
49{
50 pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
51
Ben Dooks484ae6b2005-08-10 16:45:14 +010052 power_state[port] = to;
53
54 if (power_state[0] && power_state[1])
55 s3c2410_gpio_setpin(S3C2410_GPB4, 0);
56 else
57 s3c2410_gpio_setpin(S3C2410_GPB4, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058}
59
60static irqreturn_t
Linus Torvalds0cd61b62006-10-06 10:53:39 -070061usb_simtec_ocirq(int irq, void *pw)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062{
63 struct s3c2410_hcd_info *info = (struct s3c2410_hcd_info *)pw;
64
65 if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) {
66 pr_debug("usb_simtec: over-current irq (oc detected)\n");
Ben Dooks484ae6b2005-08-10 16:45:14 +010067 s3c2410_usb_report_oc(info, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 } else {
69 pr_debug("usb_simtec: over-current irq (oc cleared)\n");
Ben Dooks484ae6b2005-08-10 16:45:14 +010070 s3c2410_usb_report_oc(info, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 }
72
73 return IRQ_HANDLED;
74}
75
76static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
77{
78 int ret;
79
80 if (on) {
Russell King9ded96f2006-01-08 01:02:07 -080081 ret = request_irq(IRQ_USBOC, usb_simtec_ocirq,
Thomas Gleixner52e405e2006-07-03 02:20:05 +020082 IRQF_DISABLED | IRQF_TRIGGER_RISING |
83 IRQF_TRIGGER_FALLING,
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 "USB Over-current", info);
85 if (ret != 0) {
86 printk(KERN_ERR "failed to request usb oc irq\n");
87 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 } else {
89 free_irq(IRQ_USBOC, info);
90 }
91}
92
93static struct s3c2410_hcd_info usb_simtec_info = {
94 .port[0] = {
95 .flags = S3C_HCDFLG_USED
96 },
97 .port[1] = {
98 .flags = S3C_HCDFLG_USED
99 },
100
101 .power_control = usb_simtec_powercontrol,
102 .enable_oc = usb_simtec_enableoc,
103};
104
105
106int usb_simtec_init(void)
107{
108 printk("USB Power Control, (c) 2004 Simtec Electronics\n");
109 s3c_device_usb.dev.platform_data = &usb_simtec_info;
110
111 s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP);
112 s3c2410_gpio_setpin(S3C2410_GPB4, 1);
113 return 0;
114}