| | 1 | /* linux/arch/arm/mach-s3c2410/usb-simtec.c |
| | 2 | * |
| | 3 | * Copyright (c) 2004,2005 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 | |
| | 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 | #include <linux/io.h> |
| | 25 | |
| | 26 | #include <asm/mach/arch.h> |
| | 27 | #include <asm/mach/map.h> |
| | 28 | #include <asm/mach/irq.h> |
| | 29 | |
| | 30 | #include <mach/bast-map.h> |
| | 31 | #include <mach/bast-irq.h> |
| | 32 | #include <mach/regs-gpio.h> |
| | 33 | |
| | 34 | #include <mach/hardware.h> |
| | 35 | #include <asm/irq.h> |
| | 36 | |
| | 37 | #include <plat/usb-control.h> |
| | 38 | #include <plat/devs.h> |
| | 39 | |
| | 40 | #include "usb-simtec.h" |
| | 41 | |
| | 42 | /* control power and monitor over-current events on various Simtec |
| | 43 | * designed boards. |
| | 44 | */ |
| | 45 | |
| | 46 | static unsigned int power_state[2]; |
| | 47 | |
| | 48 | static void |
| | 49 | usb_simtec_powercontrol(int port, int to) |
| | 50 | { |
| | 51 | pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); |
| | 52 | |
| | 53 | power_state[port] = to; |
| | 54 | |
| | 55 | if (power_state[0] && power_state[1]) |
| | 56 | s3c2410_gpio_setpin(S3C2410_GPB4, 0); |
| | 57 | else |
| | 58 | s3c2410_gpio_setpin(S3C2410_GPB4, 1); |
| | 59 | } |
| | 60 | |
| | 61 | static irqreturn_t |
| | 62 | usb_simtec_ocirq(int irq, void *pw) |
| | 63 | { |
| | 64 | struct s3c2410_hcd_info *info = pw; |
| | 65 | |
| | 66 | if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) { |
| | 67 | pr_debug("usb_simtec: over-current irq (oc detected)\n"); |
| | 68 | s3c2410_usb_report_oc(info, 3); |
| | 69 | } else { |
| | 70 | pr_debug("usb_simtec: over-current irq (oc cleared)\n"); |
| | 71 | s3c2410_usb_report_oc(info, 0); |
| | 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) { |
| | 82 | ret = request_irq(IRQ_USBOC, usb_simtec_ocirq, |
| | 83 | IRQF_DISABLED | IRQF_TRIGGER_RISING | |
| | 84 | IRQF_TRIGGER_FALLING, |
| | 85 | "USB Over-current", info); |
| | 86 | if (ret != 0) { |
| | 87 | printk(KERN_ERR "failed to request usb oc irq\n"); |
| | 88 | } |
| | 89 | } else { |
| | 90 | free_irq(IRQ_USBOC, info); |
| | 91 | } |
| | 92 | } |
| | 93 | |
| | 94 | static struct s3c2410_hcd_info usb_simtec_info = { |
| | 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 | { |
| | 109 | printk("USB Power Control, (c) 2004 Simtec Electronics\n"); |
| | 110 | s3c_device_usb.dev.platform_data = &usb_simtec_info; |
| | 111 | |
| | 112 | s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP); |
| | 113 | s3c2410_gpio_setpin(S3C2410_GPB4, 1); |
| | 114 | return 0; |
| | 115 | } |
projects / mirror_ubuntu-bionic-kernel.git / blame_incremental