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_ch9.h> 38 #include <linux/usb/input.h> 39 #include "usb.h" 40 #include "onetouch.h" 41 #include "debug.h" 42 43 void onetouch_release_input(void *onetouch_); 44 45 struct usb_onetouch { 46 char name[128]; 47 char phys[64]; 48 struct input_dev *dev; /* input device interface */ 49 struct usb_device *udev; /* usb device */ 50 51 struct urb *irq; /* urb for interrupt in report */ 52 unsigned char *data; /* input data */ 53 dma_addr_t data_dma; 54 unsigned int is_open:1; 55 }; 56 57 static void usb_onetouch_irq(struct urb *urb, struct pt_regs *regs) 58 { 59 struct usb_onetouch *onetouch = urb->context; 60 signed char *data = onetouch->data; 61 struct input_dev *dev = onetouch->dev; 62 int status; 63 64 switch (urb->status) { 65 case 0: /* success */ 66 break; 67 case -ECONNRESET: /* unlink */ 68 case -ENOENT: 69 case -ESHUTDOWN: 70 return; 71 /* -EPIPE: should clear the halt */ 72 default: /* error */ 73 goto resubmit; 74 } 75 76 input_regs(dev, regs); 77 input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02); 78 input_sync(dev); 79 80 resubmit: 81 status = usb_submit_urb (urb, SLAB_ATOMIC); 82 if (status) 83 err ("can't resubmit intr, %s-%s/input0, status %d", 84 onetouch->udev->bus->bus_name, 85 onetouch->udev->devpath, status); 86 } 87 88 static int usb_onetouch_open(struct input_dev *dev) 89 { 90 struct usb_onetouch *onetouch = dev->private; 91 92 onetouch->is_open = 1; 93 onetouch->irq->dev = onetouch->udev; 94 if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) { 95 err("usb_submit_urb failed"); 96 return -EIO; 97 } 98 99 return 0; 100 } 101 102 static void usb_onetouch_close(struct input_dev *dev) 103 { 104 struct usb_onetouch *onetouch = dev->private; 105 106 usb_kill_urb(onetouch->irq); 107 onetouch->is_open = 0; 108 } 109 110 #ifdef CONFIG_PM 111 static void usb_onetouch_pm_hook(struct us_data *us, int action) 112 { 113 struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra; 114 115 if (onetouch->is_open) { 116 switch (action) { 117 case US_SUSPEND: 118 usb_kill_urb(onetouch->irq); 119 break; 120 case US_RESUME: 121 if (usb_submit_urb(onetouch->irq, GFP_KERNEL) != 0) 122 err("usb_submit_urb failed"); 123 break; 124 default: 125 break; 126 } 127 } 128 } 129 #endif /* CONFIG_PM */ 130 131 int onetouch_connect_input(struct us_data *ss) 132 { 133 struct usb_device *udev = ss->pusb_dev; 134 struct usb_host_interface *interface; 135 struct usb_endpoint_descriptor *endpoint; 136 struct usb_onetouch *onetouch; 137 struct input_dev *input_dev; 138 int pipe, maxp; 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 (!(endpoint->bEndpointAddress & USB_DIR_IN)) 147 return -ENODEV; 148 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 149 != USB_ENDPOINT_XFER_INT) 150 return -ENODEV; 151 152 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress); 153 maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe)); 154 155 onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL); 156 input_dev = input_allocate_device(); 157 if (!onetouch || !input_dev) 158 goto fail1; 159 160 onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN, 161 SLAB_ATOMIC, &onetouch->data_dma); 162 if (!onetouch->data) 163 goto fail1; 164 165 onetouch->irq = usb_alloc_urb(0, GFP_KERNEL); 166 if (!onetouch->irq) 167 goto fail2; 168 169 onetouch->udev = udev; 170 onetouch->dev = input_dev; 171 172 if (udev->manufacturer) 173 strlcpy(onetouch->name, udev->manufacturer, 174 sizeof(onetouch->name)); 175 if (udev->product) { 176 if (udev->manufacturer) 177 strlcat(onetouch->name, " ", sizeof(onetouch->name)); 178 strlcat(onetouch->name, udev->product, sizeof(onetouch->name)); 179 } 180 181 if (!strlen(onetouch->name)) 182 snprintf(onetouch->name, sizeof(onetouch->name), 183 "Maxtor Onetouch %04x:%04x", 184 le16_to_cpu(udev->descriptor.idVendor), 185 le16_to_cpu(udev->descriptor.idProduct)); 186 187 usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys)); 188 strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys)); 189 190 input_dev->name = onetouch->name; 191 input_dev->phys = onetouch->phys; 192 usb_to_input_id(udev, &input_dev->id); 193 input_dev->cdev.dev = &udev->dev; 194 195 set_bit(EV_KEY, input_dev->evbit); 196 set_bit(ONETOUCH_BUTTON, input_dev->keybit); 197 clear_bit(0, input_dev->keybit); 198 199 input_dev->private = onetouch; 200 input_dev->open = usb_onetouch_open; 201 input_dev->close = usb_onetouch_close; 202 203 usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data, 204 (maxp > 8 ? 8 : maxp), 205 usb_onetouch_irq, onetouch, endpoint->bInterval); 206 onetouch->irq->transfer_dma = onetouch->data_dma; 207 onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 208 209 ss->extra_destructor = onetouch_release_input; 210 ss->extra = onetouch; 211 #ifdef CONFIG_PM 212 ss->suspend_resume_hook = usb_onetouch_pm_hook; 213 #endif 214 215 input_register_device(onetouch->dev); 216 217 return 0; 218 219 fail2: usb_buffer_free(udev, ONETOUCH_PKT_LEN, 220 onetouch->data, onetouch->data_dma); 221 fail1: kfree(onetouch); 222 input_free_device(input_dev); 223 return -ENOMEM; 224 } 225 226 void onetouch_release_input(void *onetouch_) 227 { 228 struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_; 229 230 if (onetouch) { 231 usb_kill_urb(onetouch->irq); 232 input_unregister_device(onetouch->dev); 233 usb_free_urb(onetouch->irq); 234 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN, 235 onetouch->data, onetouch->data_dma); 236 } 237 } 238