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/config.h> 32 #include <linux/kernel.h> 33 #include <linux/input.h> 34 #include <linux/init.h> 35 #include <linux/slab.h> 36 #include <linux/module.h> 37 #include <linux/usb.h> 38 #include <linux/usb_ch9.h> 39 #include <linux/usb_input.h> 40 #include "usb.h" 41 #include "onetouch.h" 42 #include "debug.h" 43 44 void onetouch_release_input(void *onetouch_); 45 46 struct usb_onetouch { 47 char name[128]; 48 char phys[64]; 49 struct input_dev *dev; /* input device interface */ 50 struct usb_device *udev; /* usb device */ 51 52 struct urb *irq; /* urb for interrupt in report */ 53 unsigned char *data; /* input data */ 54 dma_addr_t data_dma; 55 unsigned int is_open:1; 56 }; 57 58 static void usb_onetouch_irq(struct urb *urb, struct pt_regs *regs) 59 { 60 struct usb_onetouch *onetouch = urb->context; 61 signed char *data = onetouch->data; 62 struct input_dev *dev = onetouch->dev; 63 int status; 64 65 switch (urb->status) { 66 case 0: /* success */ 67 break; 68 case -ECONNRESET: /* unlink */ 69 case -ENOENT: 70 case -ESHUTDOWN: 71 return; 72 /* -EPIPE: should clear the halt */ 73 default: /* error */ 74 goto resubmit; 75 } 76 77 input_regs(dev, regs); 78 input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02); 79 input_sync(dev); 80 81 resubmit: 82 status = usb_submit_urb (urb, SLAB_ATOMIC); 83 if (status) 84 err ("can't resubmit intr, %s-%s/input0, status %d", 85 onetouch->udev->bus->bus_name, 86 onetouch->udev->devpath, status); 87 } 88 89 static int usb_onetouch_open(struct input_dev *dev) 90 { 91 struct usb_onetouch *onetouch = dev->private; 92 93 onetouch->is_open = 1; 94 onetouch->irq->dev = onetouch->udev; 95 if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) { 96 err("usb_submit_urb failed"); 97 return -EIO; 98 } 99 100 return 0; 101 } 102 103 static void usb_onetouch_close(struct input_dev *dev) 104 { 105 struct usb_onetouch *onetouch = dev->private; 106 107 usb_kill_urb(onetouch->irq); 108 onetouch->is_open = 0; 109 } 110 111 #ifdef CONFIG_PM 112 static void usb_onetouch_pm_hook(struct us_data *us, int action) 113 { 114 struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra; 115 116 if (onetouch->is_open) { 117 switch (action) { 118 case US_SUSPEND: 119 usb_kill_urb(onetouch->irq); 120 break; 121 case US_RESUME: 122 if (usb_submit_urb(onetouch->irq, GFP_KERNEL) != 0) 123 err("usb_submit_urb failed"); 124 break; 125 default: 126 break; 127 } 128 } 129 } 130 #endif /* CONFIG_PM */ 131 132 int onetouch_connect_input(struct us_data *ss) 133 { 134 struct usb_device *udev = ss->pusb_dev; 135 struct usb_host_interface *interface; 136 struct usb_endpoint_descriptor *endpoint; 137 struct usb_onetouch *onetouch; 138 struct input_dev *input_dev; 139 int pipe, maxp; 140 141 interface = ss->pusb_intf->cur_altsetting; 142 143 if (interface->desc.bNumEndpoints != 3) 144 return -ENODEV; 145 146 endpoint = &interface->endpoint[2].desc; 147 if (!(endpoint->bEndpointAddress & USB_DIR_IN)) 148 return -ENODEV; 149 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 150 != USB_ENDPOINT_XFER_INT) 151 return -ENODEV; 152 153 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress); 154 maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe)); 155 156 onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL); 157 input_dev = input_allocate_device(); 158 if (!onetouch || !input_dev) 159 goto fail1; 160 161 onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN, 162 SLAB_ATOMIC, &onetouch->data_dma); 163 if (!onetouch->data) 164 goto fail1; 165 166 onetouch->irq = usb_alloc_urb(0, GFP_KERNEL); 167 if (!onetouch->irq) 168 goto fail2; 169 170 onetouch->udev = udev; 171 onetouch->dev = input_dev; 172 173 if (udev->manufacturer) 174 strlcpy(onetouch->name, udev->manufacturer, 175 sizeof(onetouch->name)); 176 if (udev->product) { 177 if (udev->manufacturer) 178 strlcat(onetouch->name, " ", sizeof(onetouch->name)); 179 strlcat(onetouch->name, udev->product, sizeof(onetouch->name)); 180 } 181 182 if (!strlen(onetouch->name)) 183 snprintf(onetouch->name, sizeof(onetouch->name), 184 "Maxtor Onetouch %04x:%04x", 185 le16_to_cpu(udev->descriptor.idVendor), 186 le16_to_cpu(udev->descriptor.idProduct)); 187 188 usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys)); 189 strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys)); 190 191 input_dev->name = onetouch->name; 192 input_dev->phys = onetouch->phys; 193 usb_to_input_id(udev, &input_dev->id); 194 input_dev->cdev.dev = &udev->dev; 195 196 set_bit(EV_KEY, input_dev->evbit); 197 set_bit(ONETOUCH_BUTTON, input_dev->keybit); 198 clear_bit(0, input_dev->keybit); 199 200 input_dev->private = onetouch; 201 input_dev->open = usb_onetouch_open; 202 input_dev->close = usb_onetouch_close; 203 204 usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data, 205 (maxp > 8 ? 8 : maxp), 206 usb_onetouch_irq, onetouch, endpoint->bInterval); 207 onetouch->irq->transfer_dma = onetouch->data_dma; 208 onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 209 210 ss->extra_destructor = onetouch_release_input; 211 ss->extra = onetouch; 212 #ifdef CONFIG_PM 213 ss->suspend_resume_hook = usb_onetouch_pm_hook; 214 #endif 215 216 input_register_device(onetouch->dev); 217 218 return 0; 219 220 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 -ENOMEM; 225 } 226 227 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