projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | } |