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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>
Ben Dooksec976d62009-05-13 22:52:24 +010021#include <linux/gpio.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/timer.h>
23#include <linux/init.h>
24#include <linux/device.h>
Russell Kingfced80c2008-09-06 12:10:45 +010025#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
27#include <asm/mach/arch.h>
28#include <asm/mach/map.h>
29#include <asm/mach/irq.h>
30
Russell Kinga09e64f2008-08-05 16:14:15 +010031#include <mach/bast-map.h>
32#include <mach/bast-irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Russell Kinga09e64f2008-08-05 16:14:15 +010034#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <asm/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Ben Dooks49121aa2009-03-07 11:44:21 +000037#include <plat/usb-control.h>
Ben Dooksa2b7ba92008-10-07 22:26:09 +010038#include <plat/devs.h>
Ben Dooks49121aa2009-03-07 11:44:21 +000039
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include "usb-simtec.h"
41
42/* control power and monitor over-current events on various Simtec
43 * designed boards.
44*/
45
Ben Dooks484ae6b2005-08-10 16:45:14 +010046static unsigned int power_state[2];
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048static void
49usb_simtec_powercontrol(int port, int to)
50{
51 pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
52
Ben Dooks484ae6b2005-08-10 16:45:14 +010053 power_state[port] = to;
54
55 if (power_state[0] && power_state[1])
Ben Dooks7a05a2c2009-05-18 20:15:01 +010056 gpio_set_value(S3C2410_GPB(4), 0);
Ben Dooks484ae6b2005-08-10 16:45:14 +010057 else
Ben Dooks7a05a2c2009-05-18 20:15:01 +010058 gpio_set_value(S3C2410_GPB(4), 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059}
60
61static irqreturn_t
Linus Torvalds0cd61b62006-10-06 10:53:39 -070062usb_simtec_ocirq(int irq, void *pw)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063{
Jeff Garzik2a7057e2007-10-26 05:40:22 -040064 struct s3c2410_hcd_info *info = pw;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Ben Dooks7a05a2c2009-05-18 20:15:01 +010066 if (gpio_get_value(S3C2410_GPG(10)) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 pr_debug("usb_simtec: over-current irq (oc detected)\n");
Ben Dooks484ae6b2005-08-10 16:45:14 +010068 s3c2410_usb_report_oc(info, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 } else {
70 pr_debug("usb_simtec: over-current irq (oc cleared)\n");
Ben Dooks484ae6b2005-08-10 16:45:14 +010071 s3c2410_usb_report_oc(info, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 }
73
74 return IRQ_HANDLED;
75}
76
77static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
78{
79 int ret;
80
81 if (on) {
Russell King9ded96f2006-01-08 01:02:07 -080082 ret = request_irq(IRQ_USBOC, usb_simtec_ocirq,
Thomas Gleixner52e405e2006-07-03 02:20:05 +020083 IRQF_DISABLED | IRQF_TRIGGER_RISING |
84 IRQF_TRIGGER_FALLING,
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 "USB Over-current", info);
86 if (ret != 0) {
87 printk(KERN_ERR "failed to request usb oc irq\n");
88 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 } else {
90 free_irq(IRQ_USBOC, info);
91 }
92}
93
94static 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
107int usb_simtec_init(void)
108{
Ben Dooks7a05a2c2009-05-18 20:15:01 +0100109 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Ben Dooks7a05a2c2009-05-18 20:15:01 +0100111 printk("USB Power Control, (c) 2004 Simtec Electronics\n");
112
113 ret = gpio_request(S3C2410_GPB(4), "USB power control");
114 if (ret < 0) {
115 pr_err("%s: failed to get GPB4\n", __func__);
116 return ret;
117 }
118
119 ret = gpio_request(S3C2410_GPG(10), "USB overcurrent");
120 if (ret < 0) {
121 pr_err("%s: failed to get GPG10\n", __func__);
122 gpio_free(S3C2410_GPB(4));
123 return ret;
124 }
125
126 /* turn power on */
127 gpio_direction_output(S3C2410_GPB(4), 1);
128 gpio_direction_input(S3C2410_GPG(10));
129
130 s3c_device_usb.dev.platform_data = &usb_simtec_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 return 0;
132}