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1da177e4 LT |
1 | /* linux/arch/arm/mach-s3c2410/usb-simtec.c |
2 | * | |
e02f8664 | 3 | * Copyright 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> | |
ec976d6e | 21 | #include <linux/gpio.h> |
1da177e4 LT |
22 | #include <linux/timer.h> |
23 | #include <linux/init.h> | |
24 | #include <linux/device.h> | |
fced80c7 | 25 | #include <linux/io.h> |
1da177e4 LT |
26 | |
27 | #include <asm/mach/arch.h> | |
28 | #include <asm/mach/map.h> | |
29 | #include <asm/mach/irq.h> | |
30 | ||
a09e64fb RK |
31 | #include <mach/bast-map.h> |
32 | #include <mach/bast-irq.h> | |
1da177e4 | 33 | |
a09e64fb | 34 | #include <mach/hardware.h> |
1da177e4 | 35 | #include <asm/irq.h> |
1da177e4 | 36 | |
49121aa1 | 37 | #include <plat/usb-control.h> |
a2b7ba9c | 38 | #include <plat/devs.h> |
49121aa1 | 39 | |
1da177e4 LT |
40 | #include "usb-simtec.h" |
41 | ||
42 | /* control power and monitor over-current events on various Simtec | |
43 | * designed boards. | |
44 | */ | |
45 | ||
484ae6bd BD |
46 | static unsigned int power_state[2]; |
47 | ||
1da177e4 LT |
48 | static void |
49 | usb_simtec_powercontrol(int port, int to) | |
50 | { | |
51 | pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); | |
52 | ||
484ae6bd BD |
53 | power_state[port] = to; |
54 | ||
55 | if (power_state[0] && power_state[1]) | |
7a05a2cb | 56 | gpio_set_value(S3C2410_GPB(4), 0); |
484ae6bd | 57 | else |
7a05a2cb | 58 | gpio_set_value(S3C2410_GPB(4), 1); |
1da177e4 LT |
59 | } |
60 | ||
61 | static irqreturn_t | |
0cd61b68 | 62 | usb_simtec_ocirq(int irq, void *pw) |
1da177e4 | 63 | { |
2a7057e3 | 64 | struct s3c2410_hcd_info *info = pw; |
1da177e4 | 65 | |
7a05a2cb | 66 | if (gpio_get_value(S3C2410_GPG(10)) == 0) { |
1da177e4 | 67 | pr_debug("usb_simtec: over-current irq (oc detected)\n"); |
484ae6bd | 68 | s3c2410_usb_report_oc(info, 3); |
1da177e4 LT |
69 | } else { |
70 | pr_debug("usb_simtec: over-current irq (oc cleared)\n"); | |
484ae6bd | 71 | s3c2410_usb_report_oc(info, 0); |
1da177e4 LT |
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) { | |
9ded96f2 | 82 | ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, |
52e405ea TG |
83 | IRQF_DISABLED | IRQF_TRIGGER_RISING | |
84 | IRQF_TRIGGER_FALLING, | |
1da177e4 LT |
85 | "USB Over-current", info); |
86 | if (ret != 0) { | |
87 | printk(KERN_ERR "failed to request usb oc irq\n"); | |
88 | } | |
1da177e4 LT |
89 | } else { |
90 | free_irq(IRQ_USBOC, info); | |
91 | } | |
92 | } | |
93 | ||
f1267520 | 94 | static struct s3c2410_hcd_info usb_simtec_info __initdata = { |
1da177e4 LT |
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 | { | |
7a05a2cb BD |
109 | int ret; |
110 | ||
50f430e3 | 111 | printk("USB Power Control, Copyright 2004 Simtec Electronics\n"); |
1da177e4 | 112 | |
7a05a2cb BD |
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 | ||
f1267520 | 130 | s3c_ohci_set_platdata(&usb_simtec_info); |
1da177e4 LT |
131 | return 0; |
132 | } |