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/input.h> 37 #include "usb.h" 38 #include "onetouch.h" 39 #include "debug.h" 40 41 void onetouch_release_input(void *onetouch_); 42 43 struct usb_onetouch { 44 char name[128]; 45 char phys[64]; 46 struct input_dev *dev; /* input device interface */ 47 struct usb_device *udev; /* usb device */ 48 49 struct urb *irq; /* urb for interrupt in report */ 50 unsigned char *data; /* input data */ 51 dma_addr_t data_dma; 52 unsigned int is_open:1; 53 }; 54 55 static void usb_onetouch_irq(struct urb *urb) 56 { 57 struct usb_onetouch *onetouch = urb->context; 58 signed char *data = onetouch->data; 59 struct input_dev *dev = onetouch->dev; 60 int status; 61 62 switch (urb->status) { 63 case 0: /* success */ 64 break; 65 case -ECONNRESET: /* unlink */ 66 case -ENOENT: 67 case -ESHUTDOWN: 68 return; 69 /* -EPIPE: should clear the halt */ 70 default: /* error */ 71 goto resubmit; 72 } 73 74 input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02); 75 input_sync(dev); 76 77 resubmit: 78 status = usb_submit_urb (urb, GFP_ATOMIC); 79 if (status) 80 err ("can't resubmit intr, %s-%s/input0, status %d", 81 onetouch->udev->bus->bus_name, 82 onetouch->udev->devpath, status); 83 } 84 85 static int usb_onetouch_open(struct input_dev *dev) 86 { 87 struct usb_onetouch *onetouch = input_get_drvdata(dev); 88 89 onetouch->is_open = 1; 90 onetouch->irq->dev = onetouch->udev; 91 if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) { 92 err("usb_submit_urb failed"); 93 return -EIO; 94 } 95 96 return 0; 97 } 98 99 static void usb_onetouch_close(struct input_dev *dev) 100 { 101 struct usb_onetouch *onetouch = input_get_drvdata(dev); 102 103 usb_kill_urb(onetouch->irq); 104 onetouch->is_open = 0; 105 } 106 107 #ifdef CONFIG_PM 108 static void usb_onetouch_pm_hook(struct us_data *us, int action) 109 { 110 struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra; 111 112 if (onetouch->is_open) { 113 switch (action) { 114 case US_SUSPEND: 115 usb_kill_urb(onetouch->irq); 116 break; 117 case US_RESUME: 118 if (usb_submit_urb(onetouch->irq, GFP_KERNEL) != 0) 119 err("usb_submit_urb failed"); 120 break; 121 default: 122 break; 123 } 124 } 125 } 126 #endif /* CONFIG_PM */ 127 128 int onetouch_connect_input(struct us_data *ss) 129 { 130 struct usb_device *udev = ss->pusb_dev; 131 struct usb_host_interface *interface; 132 struct usb_endpoint_descriptor *endpoint; 133 struct usb_onetouch *onetouch; 134 struct input_dev *input_dev; 135 int pipe, maxp; 136 int error = -ENOMEM; 137 138 interface = ss->pusb_intf->cur_altsetting; 139 140 if (interface->desc.bNumEndpoints != 3) 141 return -ENODEV; 142 143 endpoint = &interface->endpoint[2].desc; 144 if (!usb_endpoint_is_int_in(endpoint)) 145 return -ENODEV; 146 147 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress); 148 maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe)); 149 150 onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL); 151 input_dev = input_allocate_device(); 152 if (!onetouch || !input_dev) 153 goto fail1; 154 155 onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN, 156 GFP_ATOMIC, &onetouch->data_dma); 157 if (!onetouch->data) 158 goto fail1; 159 160 onetouch->irq = usb_alloc_urb(0, GFP_KERNEL); 161 if (!onetouch->irq) 162 goto fail2; 163 164 onetouch->udev = udev; 165 onetouch->dev = input_dev; 166 167 if (udev->manufacturer) 168 strlcpy(onetouch->name, udev->manufacturer, 169 sizeof(onetouch->name)); 170 if (udev->product) { 171 if (udev->manufacturer) 172 strlcat(onetouch->name, " ", sizeof(onetouch->name)); 173 strlcat(onetouch->name, udev->product, sizeof(onetouch->name)); 174 } 175 176 if (!strlen(onetouch->name)) 177 snprintf(onetouch->name, sizeof(onetouch->name), 178 "Maxtor Onetouch %04x:%04x", 179 le16_to_cpu(udev->descriptor.idVendor), 180 le16_to_cpu(udev->descriptor.idProduct)); 181 182 usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys)); 183 strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys)); 184 185 input_dev->name = onetouch->name; 186 input_dev->phys = onetouch->phys; 187 usb_to_input_id(udev, &input_dev->id); 188 input_dev->dev.parent = &udev->dev; 189 190 set_bit(EV_KEY, input_dev->evbit); 191 set_bit(ONETOUCH_BUTTON, input_dev->keybit); 192 clear_bit(0, input_dev->keybit); 193 194 input_set_drvdata(input_dev, onetouch); 195 196 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