projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | 31 | #include <mach/hardware.h> |
| b0161caa | 32 | #include <mach/gpio-samsung.h> |
| 1da177e4 | 33 | #include <asm/irq.h> |
| 1da177e4 | 34 | |
| 436d42c6 | 35 | #include <linux/platform_data/usb-ohci-s3c2410.h> |
| a2b7ba9c | 36 | #include <plat/devs.h> |
| 49121aa1 | 37 | |
| bbd7e5e1 | 38 | #include "bast.h" |
| ec2cc753 | 39 | #include "simtec.h" |
| 1da177e4 LT |
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]) | |
| 7a05a2cb | 55 | gpio_set_value(S3C2410_GPB(4), 0); |
| 484ae6bd | 56 | else |
| 7a05a2cb | 57 | gpio_set_value(S3C2410_GPB(4), 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 | 64 | |
| 7a05a2cb | 65 | if (gpio_get_value(S3C2410_GPG(10)) == 0) { |
| 1da177e4 | 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) { | |
| bbd7e5e1 | 81 | ret = request_irq(BAST_IRQ_USBOC, usb_simtec_ocirq, |
| fa53d5cd | 82 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, |
| 1da177e4 LT |
83 | "USB Over-current", info); |
| 84 | if (ret != 0) { | |
| 85 | printk(KERN_ERR "failed to request usb oc irq\n"); | |
| 86 | } | |
| 1da177e4 | 87 | } else { |
| bbd7e5e1 | 88 | free_irq(BAST_IRQ_USBOC, info); |
| 1da177e4 LT |
89 | } |
| 90 | } | |
| 91 | ||
| f1267520 | 92 | static struct s3c2410_hcd_info usb_simtec_info __initdata = { |
| 1da177e4 LT |
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 | ||
| 673550a1 | 105 | int __init usb_simtec_init(void) |
| 1da177e4 | 106 | { |
| 7a05a2cb BD |
107 | int ret; |
| 108 | ||
| 50f430e3 | 109 | printk("USB Power Control, Copyright 2004 Simtec Electronics\n"); |
| 1da177e4 | 110 | |
| 7a05a2cb BD |
111 | ret = gpio_request(S3C2410_GPB(4), "USB power control"); |
| 112 | if (ret < 0) { | |
| 113 | pr_err("%s: failed to get GPB4\n", __func__); | |
| 114 | return ret; | |
| 115 | } | |
| 116 | ||
| 117 | ret = gpio_request(S3C2410_GPG(10), "USB overcurrent"); | |
| 118 | if (ret < 0) { | |
| 119 | pr_err("%s: failed to get GPG10\n", __func__); | |
| 120 | gpio_free(S3C2410_GPB(4)); | |
| 121 | return ret; | |
| 122 | } | |
| 123 | ||
| 124 | /* turn power on */ | |
| 125 | gpio_direction_output(S3C2410_GPB(4), 1); | |
| 126 | gpio_direction_input(S3C2410_GPG(10)); | |
| 127 | ||
| f1267520 | 128 | s3c_ohci_set_platdata(&usb_simtec_info); |
| 1da177e4 LT |
129 | return 0; |
| 130 | } |