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1da177e4 LT |
1 | /* linux/arch/arm/mach-s3c2410/usb-simtec.c |
2 | * | |
3 | * Copyright (c) 2004 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 | * Modifications: | |
15 | * 14-Sep-2004 BJD Created | |
16 | * 18-Oct-2004 BJD Cleanups, and added code to report OC cleared | |
17 | */ | |
18 | ||
19 | #define DEBUG | |
20 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/device.h> | |
28 | ||
29 | #include <asm/mach/arch.h> | |
30 | #include <asm/mach/map.h> | |
31 | #include <asm/mach/irq.h> | |
32 | ||
33 | #include <asm/arch/bast-map.h> | |
34 | #include <asm/arch/bast-irq.h> | |
35 | #include <asm/arch/usb-control.h> | |
36 | #include <asm/arch/regs-gpio.h> | |
37 | ||
38 | #include <asm/hardware.h> | |
39 | #include <asm/io.h> | |
40 | #include <asm/irq.h> | |
41 | #include <asm/mach-types.h> | |
42 | ||
43 | #include "devs.h" | |
44 | #include "usb-simtec.h" | |
45 | ||
46 | /* control power and monitor over-current events on various Simtec | |
47 | * designed boards. | |
48 | */ | |
49 | ||
50 | static void | |
51 | usb_simtec_powercontrol(int port, int to) | |
52 | { | |
53 | pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); | |
54 | ||
55 | if (port == 1) | |
56 | s3c2410_gpio_setpin(S3C2410_GPB4, to ? 0:1); | |
57 | } | |
58 | ||
59 | static irqreturn_t | |
60 | usb_simtec_ocirq(int irq, void *pw, struct pt_regs *regs) | |
61 | { | |
62 | struct s3c2410_hcd_info *info = (struct s3c2410_hcd_info *)pw; | |
63 | ||
64 | if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) { | |
65 | pr_debug("usb_simtec: over-current irq (oc detected)\n"); | |
66 | s3c2410_report_oc(info, 3); | |
67 | } else { | |
68 | pr_debug("usb_simtec: over-current irq (oc cleared)\n"); | |
69 | s3c2410_report_oc(info, 0); | |
70 | } | |
71 | ||
72 | return IRQ_HANDLED; | |
73 | } | |
74 | ||
75 | static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on) | |
76 | { | |
77 | int ret; | |
78 | ||
79 | if (on) { | |
80 | ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, SA_INTERRUPT, | |
81 | "USB Over-current", info); | |
82 | if (ret != 0) { | |
83 | printk(KERN_ERR "failed to request usb oc irq\n"); | |
84 | } | |
85 | ||
86 | set_irq_type(IRQ_USBOC, IRQT_BOTHEDGE); | |
87 | } else { | |
88 | free_irq(IRQ_USBOC, info); | |
89 | } | |
90 | } | |
91 | ||
92 | static struct s3c2410_hcd_info usb_simtec_info = { | |
93 | .port[0] = { | |
94 | .flags = S3C_HCDFLG_USED | |
95 | }, | |
96 | .port[1] = { | |
97 | .flags = S3C_HCDFLG_USED | |
98 | }, | |
99 | ||
100 | .power_control = usb_simtec_powercontrol, | |
101 | .enable_oc = usb_simtec_enableoc, | |
102 | }; | |
103 | ||
104 | ||
105 | int usb_simtec_init(void) | |
106 | { | |
107 | printk("USB Power Control, (c) 2004 Simtec Electronics\n"); | |
108 | s3c_device_usb.dev.platform_data = &usb_simtec_info; | |
109 | ||
110 | s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP); | |
111 | s3c2410_gpio_setpin(S3C2410_GPB4, 1); | |
112 | return 0; | |
113 | } |