1 /* 2 * Support for the Maxtor OneTouch USB hard drive's button 3 * 4 * Current development and maintenance by: 5 * Copyright (c) 2005 Nick Sillik <n.sillik@temple.edu> 6 * 7 * Initial work by: 8 * Copyright (c) 2003 Erik Thyren <erth7411@student.uu.se> 9 * 10 * Based on usbmouse.c (Vojtech Pavlik) and xpad.c (Marko Friedemann) 11 * 12 */ 13 14 /* 15 * This program is free software; you can redistribute it and/or modify 16 * it under the terms of the GNU General Public License as published by 17 * the Free Software Foundation; either version 2 of the License, or 18 * (at your option) any later version. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with this program; if not, write to the Free Software 27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 28 * 29 */ 30 31 #include <linux/kernel.h> 32 #include <linux/input.h> 33 #include <linux/init.h> 34 #include <linux/slab.h> 35 #include <linux/module.h> 36 #include <linux/usb_ch9.h> 37 #include <linux/usb/input.h> 38 #include "usb.h" 39 #include "onetouch.h" 40 #include "debug.h" 41 42 void onetouch_release_input(void *onetouch_); 43 44 struct usb_onetouch { 45 char name[128]; 46 char phys[64]; 47 struct input_dev *dev; /* input device interface */ 48 struct usb_device *udev; /* usb device */ 49 50 struct urb *irq; /* urb for interrupt in report */ 51 unsigned char *data; /* input data */ 52 dma_addr_t data_dma; 53 unsigned int is_open:1; 54 }; 55 56 static void usb_onetouch_irq(struct urb *urb) 57 { 58 struct usb_onetouch *onetouch = urb->context; 59 signed char *data = onetouch->data; 60 struct input_dev *dev = onetouch->dev; 61 int status; 62 63 switch (urb->status) { 64 case 0: /* success */ 65 break; 66 case -ECONNRESET: /* unlink */ 67 case -ENOENT: 68 case -ESHUTDOWN: 69 return; 70 /* -EPIPE: should clear the halt */ 71 default: /* error */ 72 goto resubmit; 73 } 74 75 input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02); 76 input_sync(dev); 77 78 resubmit: 79 status = usb_submit_urb (urb, SLAB_ATOMIC); 80 if (status) 81 err ("can't resubmit intr, %s-%s/input0, status %d", 82 onetouch->udev->bus->bus_name, 83 onetouch->udev->devpath, status); 84 } 85 86 static int usb_onetouch_open(struct input_dev *dev) 87 { 88 struct usb_onetouch *onetouch = dev->private; 89 90 onetouch->is_open = 1; 91 onetouch->irq->dev = onetouch->udev; 92 if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) { 93 err("usb_submit_urb failed"); 94 return -EIO; 95 } 96 97 return 0; 98 } 99 100 static void usb_onetouch_close(struct input_dev *dev) 101 { 102 struct usb_onetouch *onetouch = dev->private; 103 104 usb_kill_urb(onetouch->irq); 105 onetouch->is_open = 0; 106 } 107 108 #ifdef CONFIG_PM 109 static void usb_onetouch_pm_hook(struct us_data *us, int action) 110 { 111 struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra; 112 113 if (onetouch->is_open) { 114 switch (action) { 115 case US_SUSPEND: 116 usb_kill_urb(onetouch->irq); 117 break; 118 case US_RESUME: 119 if (usb_submit_urb(onetouch->irq, GFP_KERNEL) != 0) 120 err("usb_submit_urb failed"); 121 break; 122 default: 123 break; 124 } 125 } 126 } 127 #endif /* CONFIG_PM */ 128 129 int onetouch_connect_input(struct us_data *ss) 130 { 131 struct usb_device *udev = ss->pusb_dev; 132 struct usb_host_interface *interface; 133 struct usb_endpoint_descriptor *endpoint; 134 struct usb_onetouch *onetouch; 135 struct input_dev *input_dev; 136 int pipe, maxp; 137 int error = -ENOMEM; 138 139 interface = ss->pusb_intf->cur_altsetting; 140 141 if (interface->desc.bNumEndpoints != 3) 142 return -ENODEV; 143 144 endpoint = &interface->endpoint[2].desc; 145 if (!usb_endpoint_is_int_in(endpoint)) 146 return -ENODEV; 147 148 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress); 149 maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe)); 150 151 onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL); 152 input_dev = input_allocate_device(); 153 if (!onetouch || !input_dev) 154 goto fail1; 155 156 onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN, 157 SLAB_ATOMIC, &onetouch->data_dma); 158 if (!onetouch->data) 159 goto fail1; 160 161 onetouch->irq = usb_alloc_urb(0, GFP_KERNEL); 162 if (!onetouch->irq) 163 goto fail2; 164 165 onetouch->udev = udev; 166 onetouch->dev = input_dev; 167 168 if (udev->manufacturer) 169 strlcpy(onetouch->name, udev->manufacturer, 170 sizeof(onetouch->name)); 171 if (udev->product) { 172 if (udev->manufacturer) 173 strlcat(onetouch->name, " ", sizeof(onetouch->name)); 174 strlcat(onetouch->name, udev->product, sizeof(onetouch->name)); 175 } 176 177 if (!strlen(onetouch->name)) 178 snprintf(onetouch->name, sizeof(onetouch->name), 179 "Maxtor Onetouch %04x:%04x", 180 le16_to_cpu(udev->descriptor.idVendor), 181 le16_to_cpu(udev->descriptor.idProduct)); 182 183 usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys)); 184 strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys)); 185 186 input_dev->name = onetouch->name; 187 input_dev->phys = onetouch->phys; 188 usb_to_input_id(udev, &input_dev->id); 189 input_dev->cdev.dev = &udev->dev; 190 191 set_bit(EV_KEY, input_dev->evbit); 192 set_bit(ONETOUCH_BUTTON, input_dev->keybit); 193 clear_bit(0, input_dev->keybit); 194 195 input_dev->private = onetouch; 196 input_dev->open = usb_onetouch_open; 197 input_dev->close = usb_onetouch_close; 198 199 usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data, 200 (maxp > 8 ? 8 : maxp), 201 usb_onetouch_irq, onetouch, endpoint->bInterval); 202 onetouch->irq->transfer_dma = onetouch->data_dma; 203 onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 204 205 ss->extra_destructor = onetouch_release_input; 206 ss->extra = onetouch; 207 #ifdef CONFIG_PM 208 ss->suspend_resume_hook = usb_onetouch_pm_hook; 209 #endif 210 211 error = input_register_device(onetouch->dev); 212 if (error) 213 goto fail3; 214 215 return 0; 216 217 fail3: usb_free_urb(onetouch->irq); 218 fail2: usb_buffer_free(udev, ONETOUCH_PKT_LEN, 219 onetouch->data, onetouch->data_dma); 220 fail1: kfree(onetouch); 221 input_free_device(input_dev); 222 return error; 223 } 224 225 void onetouch_release_input(void *onetouch_) 226 { 227 struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_; 228 229 if (onetouch) { 230 usb_kill_urb(onetouch->irq); 231 input_unregister_device(onetouch->dev); 232 usb_free_urb(onetouch->irq); 233 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN, 234 onetouch->data, onetouch->data_dma); 235 } 236 } 237