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1 | /* linux/arch/arm/mach-s3c2410/usb-simtec.c | |
2 | * | |
3 | * Copyright (c) 2004,2005 Simtec Electronics | |
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. | |
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> | |
24 | #include <linux/io.h> | |
25 | ||
26 | #include <asm/mach/arch.h> | |
27 | #include <asm/mach/map.h> | |
28 | #include <asm/mach/irq.h> | |
29 | ||
30 | #include <mach/bast-map.h> | |
31 | #include <mach/bast-irq.h> | |
32 | #include <mach/regs-gpio.h> | |
33 | ||
34 | #include <mach/hardware.h> | |
35 | #include <asm/irq.h> | |
36 | ||
37 | #include <plat/usb-control.h> | |
38 | #include <plat/devs.h> | |
39 | ||
40 | #include "usb-simtec.h" | |
41 | ||
42 | /* control power and monitor over-current events on various Simtec | |
43 | * designed boards. | |
44 | */ | |
45 | ||
46 | static unsigned int power_state[2]; | |
47 | ||
48 | static void | |
49 | usb_simtec_powercontrol(int port, int to) | |
50 | { | |
51 | pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); | |
52 | ||
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); | |
59 | } | |
60 | ||
61 | static irqreturn_t | |
62 | usb_simtec_ocirq(int irq, void *pw) | |
63 | { | |
64 | struct s3c2410_hcd_info *info = pw; | |
65 | ||
66 | if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) { | |
67 | pr_debug("usb_simtec: over-current irq (oc detected)\n"); | |
68 | s3c2410_usb_report_oc(info, 3); | |
69 | } else { | |
70 | pr_debug("usb_simtec: over-current irq (oc cleared)\n"); | |
71 | s3c2410_usb_report_oc(info, 0); | |
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) { | |
82 | ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, | |
83 | IRQF_DISABLED | IRQF_TRIGGER_RISING | | |
84 | IRQF_TRIGGER_FALLING, | |
85 | "USB Over-current", info); | |
86 | if (ret != 0) { | |
87 | printk(KERN_ERR "failed to request usb oc irq\n"); | |
88 | } | |
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 | } |