1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun //
3*4882a593Smuzhiyun // Copyright 2004-2005 Simtec Electronics
4*4882a593Smuzhiyun // Ben Dooks <ben@simtec.co.uk>
5*4882a593Smuzhiyun //
6*4882a593Smuzhiyun // http://www.simtec.co.uk/products/EB2410ITX/
7*4882a593Smuzhiyun //
8*4882a593Smuzhiyun // Simtec BAST and Thorcom VR1000 USB port support functions
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #define DEBUG
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/kernel.h>
13*4882a593Smuzhiyun #include <linux/types.h>
14*4882a593Smuzhiyun #include <linux/interrupt.h>
15*4882a593Smuzhiyun #include <linux/list.h>
16*4882a593Smuzhiyun #include <linux/gpio.h>
17*4882a593Smuzhiyun #include <linux/timer.h>
18*4882a593Smuzhiyun #include <linux/init.h>
19*4882a593Smuzhiyun #include <linux/device.h>
20*4882a593Smuzhiyun #include <linux/io.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #include <asm/mach/arch.h>
23*4882a593Smuzhiyun #include <asm/mach/map.h>
24*4882a593Smuzhiyun #include <asm/mach/irq.h>
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #include "gpio-samsung.h"
27*4882a593Smuzhiyun #include <mach/irqs.h>
28*4882a593Smuzhiyun #include <asm/irq.h>
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun #include <linux/platform_data/usb-ohci-s3c2410.h>
31*4882a593Smuzhiyun #include "devs.h"
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun #include "bast.h"
34*4882a593Smuzhiyun #include "simtec.h"
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun /* control power and monitor over-current events on various Simtec
37*4882a593Smuzhiyun * designed boards.
38*4882a593Smuzhiyun */
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun static unsigned int power_state[2];
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun static void
usb_simtec_powercontrol(int port,int to)43*4882a593Smuzhiyun usb_simtec_powercontrol(int port, int to)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun power_state[port] = to;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (power_state[0] && power_state[1])
50*4882a593Smuzhiyun gpio_set_value(S3C2410_GPB(4), 0);
51*4882a593Smuzhiyun else
52*4882a593Smuzhiyun gpio_set_value(S3C2410_GPB(4), 1);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun static irqreturn_t
usb_simtec_ocirq(int irq,void * pw)56*4882a593Smuzhiyun usb_simtec_ocirq(int irq, void *pw)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun struct s3c2410_hcd_info *info = pw;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun if (gpio_get_value(S3C2410_GPG(10)) == 0) {
61*4882a593Smuzhiyun pr_debug("usb_simtec: over-current irq (oc detected)\n");
62*4882a593Smuzhiyun s3c2410_usb_report_oc(info, 3);
63*4882a593Smuzhiyun } else {
64*4882a593Smuzhiyun pr_debug("usb_simtec: over-current irq (oc cleared)\n");
65*4882a593Smuzhiyun s3c2410_usb_report_oc(info, 0);
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun return IRQ_HANDLED;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
usb_simtec_enableoc(struct s3c2410_hcd_info * info,int on)71*4882a593Smuzhiyun static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on)
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun int ret;
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun if (on) {
76*4882a593Smuzhiyun ret = request_irq(BAST_IRQ_USBOC, usb_simtec_ocirq,
77*4882a593Smuzhiyun IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
78*4882a593Smuzhiyun "USB Over-current", info);
79*4882a593Smuzhiyun if (ret != 0) {
80*4882a593Smuzhiyun printk(KERN_ERR "failed to request usb oc irq\n");
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun } else {
83*4882a593Smuzhiyun free_irq(BAST_IRQ_USBOC, info);
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun static struct s3c2410_hcd_info usb_simtec_info __initdata = {
88*4882a593Smuzhiyun .port[0] = {
89*4882a593Smuzhiyun .flags = S3C_HCDFLG_USED
90*4882a593Smuzhiyun },
91*4882a593Smuzhiyun .port[1] = {
92*4882a593Smuzhiyun .flags = S3C_HCDFLG_USED
93*4882a593Smuzhiyun },
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun .power_control = usb_simtec_powercontrol,
96*4882a593Smuzhiyun .enable_oc = usb_simtec_enableoc,
97*4882a593Smuzhiyun };
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun
usb_simtec_init(void)100*4882a593Smuzhiyun int __init usb_simtec_init(void)
101*4882a593Smuzhiyun {
102*4882a593Smuzhiyun int ret;
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun printk("USB Power Control, Copyright 2004 Simtec Electronics\n");
105*4882a593Smuzhiyun
106*4882a593Smuzhiyun ret = gpio_request(S3C2410_GPB(4), "USB power control");
107*4882a593Smuzhiyun if (ret < 0) {
108*4882a593Smuzhiyun pr_err("%s: failed to get GPB4\n", __func__);
109*4882a593Smuzhiyun return ret;
110*4882a593Smuzhiyun }
111*4882a593Smuzhiyun
112*4882a593Smuzhiyun ret = gpio_request(S3C2410_GPG(10), "USB overcurrent");
113*4882a593Smuzhiyun if (ret < 0) {
114*4882a593Smuzhiyun pr_err("%s: failed to get GPG10\n", __func__);
115*4882a593Smuzhiyun gpio_free(S3C2410_GPB(4));
116*4882a593Smuzhiyun return ret;
117*4882a593Smuzhiyun }
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun /* turn power on */
120*4882a593Smuzhiyun gpio_direction_output(S3C2410_GPB(4), 1);
121*4882a593Smuzhiyun gpio_direction_input(S3C2410_GPG(10));
122*4882a593Smuzhiyun
123*4882a593Smuzhiyun s3c_ohci_set_platdata(&usb_simtec_info);
124*4882a593Smuzhiyun return 0;
125*4882a593Smuzhiyun }
126