Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* linux/arch/arm/mach-s3c2410/usb-simtec.c |
| 2 | * |
Ben Dooks | e02f866 | 2009-11-13 22:54:13 +0000 | [diff] [blame] | 3 | * Copyright 2004-2005 Simtec Electronics |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Ben Dooks | ec976d6 | 2009-05-13 22:52:24 +0100 | [diff] [blame] | 21 | #include <linux/gpio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/timer.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/device.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 25 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #include <asm/mach/arch.h> |
| 28 | #include <asm/mach/map.h> |
| 29 | #include <asm/mach/irq.h> |
| 30 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 31 | #include <mach/bast-map.h> |
| 32 | #include <mach/bast-irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 34 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Ben Dooks | 49121aa | 2009-03-07 11:44:21 +0000 | [diff] [blame] | 37 | #include <plat/usb-control.h> |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 38 | #include <plat/devs.h> |
Ben Dooks | 49121aa | 2009-03-07 11:44:21 +0000 | [diff] [blame] | 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include "usb-simtec.h" |
| 41 | |
| 42 | /* control power and monitor over-current events on various Simtec |
| 43 | * designed boards. |
| 44 | */ |
| 45 | |
Ben Dooks | 484ae6b | 2005-08-10 16:45:14 +0100 | [diff] [blame] | 46 | static unsigned int power_state[2]; |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | static void |
| 49 | usb_simtec_powercontrol(int port, int to) |
| 50 | { |
| 51 | pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); |
| 52 | |
Ben Dooks | 484ae6b | 2005-08-10 16:45:14 +0100 | [diff] [blame] | 53 | power_state[port] = to; |
| 54 | |
| 55 | if (power_state[0] && power_state[1]) |
Ben Dooks | 7a05a2c | 2009-05-18 20:15:01 +0100 | [diff] [blame] | 56 | gpio_set_value(S3C2410_GPB(4), 0); |
Ben Dooks | 484ae6b | 2005-08-10 16:45:14 +0100 | [diff] [blame] | 57 | else |
Ben Dooks | 7a05a2c | 2009-05-18 20:15:01 +0100 | [diff] [blame] | 58 | gpio_set_value(S3C2410_GPB(4), 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | static irqreturn_t |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 62 | usb_simtec_ocirq(int irq, void *pw) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
Jeff Garzik | 2a7057e | 2007-10-26 05:40:22 -0400 | [diff] [blame] | 64 | struct s3c2410_hcd_info *info = pw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Ben Dooks | 7a05a2c | 2009-05-18 20:15:01 +0100 | [diff] [blame] | 66 | if (gpio_get_value(S3C2410_GPG(10)) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | pr_debug("usb_simtec: over-current irq (oc detected)\n"); |
Ben Dooks | 484ae6b | 2005-08-10 16:45:14 +0100 | [diff] [blame] | 68 | s3c2410_usb_report_oc(info, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | } else { |
| 70 | pr_debug("usb_simtec: over-current irq (oc cleared)\n"); |
Ben Dooks | 484ae6b | 2005-08-10 16:45:14 +0100 | [diff] [blame] | 71 | s3c2410_usb_report_oc(info, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Russell King | 9ded96f | 2006-01-08 01:02:07 -0800 | [diff] [blame] | 82 | ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, |
Thomas Gleixner | 52e405e | 2006-07-03 02:20:05 +0200 | [diff] [blame] | 83 | IRQF_DISABLED | IRQF_TRIGGER_RISING | |
| 84 | IRQF_TRIGGER_FALLING, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | "USB Over-current", info); |
| 86 | if (ret != 0) { |
| 87 | printk(KERN_ERR "failed to request usb oc irq\n"); |
| 88 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | } else { |
| 90 | free_irq(IRQ_USBOC, info); |
| 91 | } |
| 92 | } |
| 93 | |
Ben Dooks | f126752 | 2010-01-13 14:59:46 +0900 | [diff] [blame] | 94 | static struct s3c2410_hcd_info usb_simtec_info __initdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Ben Dooks | 7a05a2c | 2009-05-18 20:15:01 +0100 | [diff] [blame] | 109 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Ben Dooks | 50f430e | 2009-11-13 22:54:12 +0000 | [diff] [blame] | 111 | printk("USB Power Control, Copyright 2004 Simtec Electronics\n"); |
Ben Dooks | 7a05a2c | 2009-05-18 20:15:01 +0100 | [diff] [blame] | 112 | |
| 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 | |
Ben Dooks | f126752 | 2010-01-13 14:59:46 +0900 | [diff] [blame] | 130 | s3c_ohci_set_platdata(&usb_simtec_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | return 0; |
| 132 | } |