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 static 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 = urb->status; 61 int retval; 62 63 switch (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 retval = usb_submit_urb (urb, GFP_ATOMIC); 80 if (retval) 81 dev_err(&dev->dev, "can't resubmit intr, %s-%s/input0, " 82 "retval %d\n", onetouch->udev->bus->bus_name, 83 onetouch->udev->devpath, retval); 84 } 85 86 static int usb_onetouch_open(struct input_dev *dev) 87 { 88 struct usb_onetouch *onetouch = input_get_drvdata(dev); 89 90 onetouch->is_open = 1; 91 onetouch->irq->dev = onetouch->udev; 92 if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) { 93 dev_err(&dev->dev, "usb_submit_urb failed\n"); 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 = input_get_drvdata(dev); 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 dev_err(&onetouch->irq->dev->dev, 121 "usb_submit_urb failed\n"); 122 break; 123 default: 124 break; 125 } 126 } 127 } 128 #endif /* CONFIG_PM */ 129 130 int onetouch_connect_input(struct us_data *ss) 131 { 132 struct usb_device *udev = ss->pusb_dev; 133 struct usb_host_interface *interface; 134 struct usb_endpoint_descriptor *endpoint; 135 struct usb_onetouch *onetouch; 136 struct input_dev *input_dev; 137 int pipe, maxp; 138 int error = -ENOMEM; 139 140 interface = ss->pusb_intf->cur_altsetting; 141 142 if (interface->desc.bNumEndpoints != 3) 143 return -ENODEV; 144 145 endpoint = &interface->endpoint[2].desc; 146 if (!usb_endpoint_is_int_in(endpoint)) 147 return -ENODEV; 148 149 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress); 150 maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe)); 151 152 onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL); 153 input_dev = input_allocate_device(); 154 if (!onetouch || !input_dev) 155 goto fail1; 156 157 onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN, 158 GFP_ATOMIC, &onetouch->data_dma); 159 if (!onetouch->data) 160 goto fail1; 161 162 onetouch->irq = usb_alloc_urb(0, GFP_KERNEL); 163 if (!onetouch->irq) 164 goto fail2; 165 166 onetouch->udev = udev; 167 onetouch->dev = input_dev; 168 169 if (udev->manufacturer) 170 strlcpy(onetouch->name, udev->manufacturer, 171 sizeof(onetouch->name)); 172 if (udev->product) { 173 if (udev->manufacturer) 174 strlcat(onetouch->name, " ", sizeof(onetouch->name)); 175 strlcat(onetouch->name, udev->product, sizeof(onetouch->name)); 176 } 177 178 if (!strlen(onetouch->name)) 179 snprintf(onetouch->name, sizeof(onetouch->name), 180 "Maxtor Onetouch %04x:%04x", 181 le16_to_cpu(udev->descriptor.idVendor), 182 le16_to_cpu(udev->descriptor.idProduct)); 183 184 usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys)); 185 strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys)); 186 187 input_dev->name = onetouch->name; 188 input_dev->phys = onetouch->phys; 189 usb_to_input_id(udev, &input_dev->id); 190 input_dev->dev.parent = &udev->dev; 191 192 set_bit(EV_KEY, input_dev->evbit); 193 set_bit(ONETOUCH_BUTTON, input_dev->keybit); 194 clear_bit(0, input_dev->keybit); 195 196 input_set_drvdata(input_dev, onetouch); 197 198 input_dev->open = usb_onetouch_open; 199 input_dev->close = usb_onetouch_close; 200 201 usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data, 202 (maxp > 8 ? 8 : maxp), 203 usb_onetouch_irq, onetouch, endpoint->bInterval); 204 onetouch->irq->transfer_dma = onetouch->data_dma; 205 onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 206 207 ss->extra_destructor = onetouch_release_input; 208 ss->extra = onetouch; 209 #ifdef CONFIG_PM 210 ss->suspend_resume_hook = usb_onetouch_pm_hook; 211 #endif 212 213 error = input_register_device(onetouch->dev); 214 if (error) 215 goto fail3; 216 217 return 0; 218 219 fail3: usb_free_urb(onetouch->irq); 220 fail2: usb_buffer_free(udev, ONETOUCH_PKT_LEN, 221 onetouch->data, onetouch->data_dma); 222 fail1: kfree(onetouch); 223 input_free_device(input_dev); 224 return error; 225 } 226 227 static void onetouch_release_input(void *onetouch_) 228 { 229 struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_; 230 231 if (onetouch) { 232 usb_kill_urb(onetouch->irq); 233 input_unregister_device(onetouch->dev); 234 usb_free_urb(onetouch->irq); 235 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN, 236 onetouch->data, onetouch->data_dma); 237 } 238 } 239