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1da177e4 LT |
1 | /* linux/arch/arm/mach-s3c2410/usb-simtec.c |
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> | |
24 | ||
25 | #include <asm/mach/arch.h> | |
26 | #include <asm/mach/map.h> | |
27 | #include <asm/mach/irq.h> | |
28 | ||
a09e64fb RK |
29 | #include <mach/bast-map.h> |
30 | #include <mach/bast-irq.h> | |
31 | #include <mach/usb-control.h> | |
32 | #include <mach/regs-gpio.h> | |
1da177e4 | 33 | |
a09e64fb | 34 | #include <mach/hardware.h> |
1da177e4 LT |
35 | #include <asm/io.h> |
36 | #include <asm/irq.h> | |
1da177e4 | 37 | |
a2b7ba9c | 38 | #include <plat/devs.h> |
1da177e4 LT |
39 | #include "usb-simtec.h" |
40 | ||
41 | /* control power and monitor over-current events on various Simtec | |
42 | * designed boards. | |
43 | */ | |
44 | ||
484ae6bd BD |
45 | static unsigned int power_state[2]; |
46 | ||
1da177e4 LT |
47 | static void |
48 | usb_simtec_powercontrol(int port, int to) | |
49 | { | |
50 | pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); | |
51 | ||
484ae6bd BD |
52 | 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); | |
1da177e4 LT |
58 | } |
59 | ||
60 | static irqreturn_t | |
0cd61b68 | 61 | usb_simtec_ocirq(int irq, void *pw) |
1da177e4 | 62 | { |
2a7057e3 | 63 | struct s3c2410_hcd_info *info = pw; |
1da177e4 LT |
64 | |
65 | if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) { | |
66 | pr_debug("usb_simtec: over-current irq (oc detected)\n"); | |
484ae6bd | 67 | s3c2410_usb_report_oc(info, 3); |
1da177e4 LT |
68 | } else { |
69 | pr_debug("usb_simtec: over-current irq (oc cleared)\n"); | |
484ae6bd | 70 | s3c2410_usb_report_oc(info, 0); |
1da177e4 LT |
71 | } |
72 | ||
73 | return IRQ_HANDLED; | |
74 | } | |
75 | ||
76 | static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on) | |
77 | { | |
78 | int ret; | |
79 | ||
80 | if (on) { | |
9ded96f2 | 81 | ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, |
52e405ea TG |
82 | IRQF_DISABLED | IRQF_TRIGGER_RISING | |
83 | IRQF_TRIGGER_FALLING, | |
1da177e4 LT |
84 | "USB Over-current", info); |
85 | if (ret != 0) { | |
86 | printk(KERN_ERR "failed to request usb oc irq\n"); | |
87 | } | |
1da177e4 LT |
88 | } else { |
89 | free_irq(IRQ_USBOC, info); | |
90 | } | |
91 | } | |
92 | ||
93 | static 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 | ||
106 | int 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 | } |