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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | // SPDX-License-Identifier: GPL-2.0 // // Copyright 2004-2005 Simtec Electronics // Ben Dooks <ben@simtec.co.uk> // // http://www.simtec.co.uk/products/EB2410ITX/ // // Simtec BAST and Thorcom VR1000 USB port support functions #define DEBUG #include <linux/kernel.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/list.h> #include <linux/gpio.h> #include <linux/timer.h> #include <linux/init.h> #include <linux/device.h> #include <linux/io.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> #include <asm/mach/irq.h> #include "gpio-samsung.h" #include <mach/irqs.h> #include <asm/irq.h> #include <linux/platform_data/usb-ohci-s3c2410.h> #include "devs.h" #include "bast.h" #include "simtec.h" /* control power and monitor over-current events on various Simtec * designed boards. */ static unsigned int power_state[2]; static void usb_simtec_powercontrol(int port, int to) { pr_debug("usb_simtec_powercontrol(%d,%d)\n", port, to); power_state[port] = to; if (power_state[0] && power_state[1]) gpio_set_value(S3C2410_GPB(4), 0); else gpio_set_value(S3C2410_GPB(4), 1); } static irqreturn_t usb_simtec_ocirq(int irq, void *pw) { struct s3c2410_hcd_info *info = pw; if (gpio_get_value(S3C2410_GPG(10)) == 0) { pr_debug("usb_simtec: over-current irq (oc detected)\n"); s3c2410_usb_report_oc(info, 3); } else { pr_debug("usb_simtec: over-current irq (oc cleared)\n"); s3c2410_usb_report_oc(info, 0); } return IRQ_HANDLED; } static void usb_simtec_enableoc(struct s3c2410_hcd_info *info, int on) { int ret; if (on) { ret = request_irq(BAST_IRQ_USBOC, usb_simtec_ocirq, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "USB Over-current", info); if (ret != 0) { printk(KERN_ERR "failed to request usb oc irq\n"); } } else { free_irq(BAST_IRQ_USBOC, info); } } static struct s3c2410_hcd_info usb_simtec_info __initdata = { .port[0] = { .flags = S3C_HCDFLG_USED }, .port[1] = { .flags = S3C_HCDFLG_USED }, .power_control = usb_simtec_powercontrol, .enable_oc = usb_simtec_enableoc, }; int __init usb_simtec_init(void) { int ret; printk("USB Power Control, Copyright 2004 Simtec Electronics\n"); ret = gpio_request(S3C2410_GPB(4), "USB power control"); if (ret < 0) { pr_err("%s: failed to get GPB4\n", __func__); return ret; } ret = gpio_request(S3C2410_GPG(10), "USB overcurrent"); if (ret < 0) { pr_err("%s: failed to get GPG10\n", __func__); gpio_free(S3C2410_GPB(4)); return ret; } /* turn power on */ gpio_direction_output(S3C2410_GPB(4), 1); gpio_direction_input(S3C2410_GPG(10)); s3c_ohci_set_platdata(&usb_simtec_info); return 0; } |