drivers/staging/tm6000/tm6000-input.c

   1 /*
   2  *  tm6000-input.c - driver for TM5600/TM6000/TM6010 USB video capture devices
   3  *
   4  *  Copyright (C) 2010 Stefan Ringel <stefan.ringel@arcor.de>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation version 2
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/delay.h>
  23
  24 #include <linux/input.h>
  25 #include <linux/usb.h>
  26
  27 #include <media/rc-core.h>
  28
  29 #include "tm6000.h"
  30 #include "tm6000-regs.h"
  31
  32 static unsigned int ir_debug;
  33 module_param(ir_debug, int, 0644);
  34 MODULE_PARM_DESC(ir_debug, "enable debug message [IR]");
  35
  36 static unsigned int enable_ir = 1;
  37 module_param(enable_ir, int, 0644);
  38 MODULE_PARM_DESC(enable_ir, "enable ir (default is enable)");
  39
  40 #undef dprintk
  41
  42 #define dprintk(fmt, arg...) \
  43         if (ir_debug) { \
  44                 printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
  45         }
  46
  47 struct tm6000_ir_poll_result {
  48         u16 rc_data;
  49 };
  50
  51 struct tm6000_IR {
  52         struct tm6000_core      *dev;
  53         struct rc_dev           *rc;
  54         char                    name[32];
  55         char                    phys[32];
  56
  57         /* poll expernal decoder */
  58         int                     polling;
  59         struct delayed_work     work;
  60         u8                      wait:1;
  61         u8                      key:1;
  62         struct urb              *int_urb;
  63         u8                      *urb_data;
  64
  65         int (*get_key) (struct tm6000_IR *, struct tm6000_ir_poll_result *);
  66
  67         /* IR device properties */
  68         u64                     ir_type;
  69 };
  70
  71
  72 void tm6000_ir_wait(struct tm6000_core *dev, u8 state)
  73 {
  74         struct tm6000_IR *ir = dev->ir;
  75
  76         if (!dev->ir)
  77                 return;
  78
  79         if (state)
  80                 ir->wait = 1;
  81         else
  82                 ir->wait = 0;
  83 }
  84
  85
  86 static int tm6000_ir_config(struct tm6000_IR *ir)
  87 {
  88         struct tm6000_core *dev = ir->dev;
  89         u8 buf[10];
  90         int rc;
  91
  92         /* hack */
  93         buf[0] = 0xff;
  94         buf[1] = 0xff;
  95         buf[2] = 0xf2;
  96         buf[3] = 0x2b;
  97         buf[4] = 0x20;
  98         buf[5] = 0x35;
  99         buf[6] = 0x60;
 100         buf[7] = 0x04;
 101         buf[8] = 0xc0;
 102         buf[9] = 0x08;
 103
 104         rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
 105                 USB_RECIP_DEVICE, REQ_00_SET_IR_VALUE, 0, 0, buf, 0x0a);
 106         msleep(100);
 107
 108         if (rc < 0) {
 109                 printk(KERN_INFO "IR configuration failed");
 110                 return rc;
 111         }
 112         return 0;
 113 }
 114
 115 static void tm6000_ir_urb_received(struct urb *urb)
 116 {
 117         struct tm6000_core *dev = urb->context;
 118         struct tm6000_IR *ir = dev->ir;
 119         int rc;
 120
 121         if (urb->status != 0)
 122                 printk(KERN_INFO "not ready\n");
 123         else if (urb->actual_length > 0) {
 124                 memcpy(ir->urb_data, urb->transfer_buffer, urb->actual_length);
 125
 126                 dprintk("data %02x %02x %02x %02x\n", ir->urb_data[0],
 127                         ir->urb_data[1], ir->urb_data[2], ir->urb_data[3]);
 128
 129                 ir->key = 1;
 130         }
 131
 132         rc = usb_submit_urb(urb, GFP_ATOMIC);
 133 }
 134
 135 static int default_polling_getkey(struct tm6000_IR *ir,
 136                                 struct tm6000_ir_poll_result *poll_result)
 137 {
 138         struct tm6000_core *dev = ir->dev;
 139         int rc;
 140         u8 buf[2];
 141
 142         if (ir->wait && !&dev->int_in)
 143                 return 0;
 144
 145         if (&dev->int_in) {
 146                 if (ir->ir_type == IR_TYPE_RC5)
 147                         poll_result->rc_data = ir->urb_data[0];
 148                 else
 149                         poll_result->rc_data = ir->urb_data[0] | ir->urb_data[1] << 8;
 150         } else {
 151                 tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 0);
 152                 msleep(10);
 153                 tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 1);
 154                 msleep(10);
 155
 156                 if (ir->ir_type == IR_TYPE_RC5) {
 157                         rc = tm6000_read_write_usb(dev, USB_DIR_IN |
 158                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 159                                 REQ_02_GET_IR_CODE, 0, 0, buf, 1);
 160
 161                         msleep(10);
 162
 163                         dprintk("read data=%02x\n", buf[0]);
 164                         if (rc < 0)
 165                                 return rc;
 166
 167                         poll_result->rc_data = buf[0];
 168                 } else {
 169                         rc = tm6000_read_write_usb(dev, USB_DIR_IN |
 170                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 171                                 REQ_02_GET_IR_CODE, 0, 0, buf, 2);
 172
 173                         msleep(10);
 174
 175                         dprintk("read data=%04x\n", buf[0] | buf[1] << 8);
 176                         if (rc < 0)
 177                                 return rc;
 178
 179                         poll_result->rc_data = buf[0] | buf[1] << 8;
 180                 }
 181                 if ((poll_result->rc_data & 0x00ff) != 0xff)
 182                         ir->key = 1;
 183         }
 184         return 0;
 185 }
 186
 187 static void tm6000_ir_handle_key(struct tm6000_IR *ir)
 188 {
 189         int result;
 190         struct tm6000_ir_poll_result poll_result;
 191
 192         /* read the registers containing the IR status */
 193         result = ir->get_key(ir, &poll_result);
 194         if (result < 0) {
 195                 printk(KERN_INFO "ir->get_key() failed %d\n", result);
 196                 return;
 197         }
 198
 199         dprintk("ir->get_key result data=%04x\n", poll_result.rc_data);
 200
 201         if (ir->key) {
 202                 ir_keydown(ir->rc, poll_result.rc_data, 0);
 203                 ir->key = 0;
 204         }
 205         return;
 206 }
 207
 208 static void tm6000_ir_work(struct work_struct *work)
 209 {
 210         struct tm6000_IR *ir = container_of(work, struct tm6000_IR, work.work);
 211
 212         tm6000_ir_handle_key(ir);
 213         schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
 214 }
 215
 216 static int tm6000_ir_start(struct rc_dev *rc)
 217 {
 218         struct tm6000_IR *ir = rc->priv;
 219
 220         INIT_DELAYED_WORK(&ir->work, tm6000_ir_work);
 221         schedule_delayed_work(&ir->work, 0);
 222
 223         return 0;
 224 }
 225
 226 static void tm6000_ir_stop(struct rc_dev *rc)
 227 {
 228         struct tm6000_IR *ir = rc->priv;
 229
 230         cancel_delayed_work_sync(&ir->work);
 231 }
 232
 233 int tm6000_ir_change_protocol(struct rc_dev *rc, u64 ir_type)
 234 {
 235         struct tm6000_IR *ir = rc->priv;
 236
 237         ir->get_key = default_polling_getkey;
 238
 239         tm6000_ir_config(ir);
 240         /* TODO */
 241         return 0;
 242 }
 243
 244 int tm6000_ir_init(struct tm6000_core *dev)
 245 {
 246         struct tm6000_IR *ir;
 247         struct rc_dev *rc;
 248         int err = -ENOMEM;
 249         int pipe, size;
 250
 251         if (!enable_ir)
 252                 return -ENODEV;
 253
 254         if (!dev->caps.has_remote)
 255                 return 0;
 256
 257         if (!dev->ir_codes)
 258                 return 0;
 259
 260         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 261         rc = rc_allocate_device();
 262         if (!ir | !rc)
 263                 goto out;
 264
 265         /* record handles to ourself */
 266         ir->dev = dev;
 267         dev->ir = ir;
 268         ir->rc = rc;
 269
 270         /* input einrichten */
 271         rc->allowed_protos = IR_TYPE_RC5 | IR_TYPE_NEC;
 272         rc->priv = ir;
 273         rc->change_protocol = tm6000_ir_change_protocol;
 274         rc->open = tm6000_ir_start;
 275         rc->close = tm6000_ir_stop;
 276         rc->driver_type = RC_DRIVER_SCANCODE;
 277
 278         ir->polling = 50;
 279
 280         snprintf(ir->name, sizeof(ir->name), "tm5600/60x0 IR (%s)",
 281                                                 dev->name);
 282
 283         usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
 284         strlcat(ir->phys, "/input0", sizeof(ir->phys));
 285
 286         tm6000_ir_change_protocol(rc, IR_TYPE_UNKNOWN);
 287
 288         rc->input_name = ir->name;
 289         rc->input_phys = ir->phys;
 290         rc->input_id.bustype = BUS_USB;
 291         rc->input_id.version = 1;
 292         rc->input_id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
 293         rc->input_id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
 294         rc->map_name = dev->ir_codes;
 295         rc->driver_name = "tm6000";
 296         rc->dev.parent = &dev->udev->dev;
 297
 298         if (&dev->int_in) {
 299                 dprintk("IR over int\n");
 300
 301                 ir->int_urb = usb_alloc_urb(0, GFP_KERNEL);
 302
 303                 pipe = usb_rcvintpipe(dev->udev,
 304                         dev->int_in.endp->desc.bEndpointAddress
 305                         & USB_ENDPOINT_NUMBER_MASK);
 306
 307                 size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 308                 dprintk("IR max size: %d\n", size);
 309
 310                 ir->int_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 311                 if (ir->int_urb->transfer_buffer == NULL) {
 312                         usb_free_urb(ir->int_urb);
 313                         goto out;
 314                 }
 315                 dprintk("int interval: %d\n", dev->int_in.endp->desc.bInterval);
 316                 usb_fill_int_urb(ir->int_urb, dev->udev, pipe,
 317                         ir->int_urb->transfer_buffer, size,
 318                         tm6000_ir_urb_received, dev,
 319                         dev->int_in.endp->desc.bInterval);
 320                 err = usb_submit_urb(ir->int_urb, GFP_KERNEL);
 321                 if (err) {
 322                         kfree(ir->int_urb->transfer_buffer);
 323                         usb_free_urb(ir->int_urb);
 324                         goto out;
 325                 }
 326                 ir->urb_data = kzalloc(size, GFP_KERNEL);
 327         }
 328
 329         /* ir register */
 330         err = rc_register_device(rc);
 331         if (err)
 332                 goto out;
 333
 334         return 0;
 335
 336 out:
 337         dev->ir = NULL;
 338         rc_free_device(rc);
 339         kfree(ir);
 340         return err;
 341 }
 342
 343 int tm6000_ir_fini(struct tm6000_core *dev)
 344 {
 345         struct tm6000_IR *ir = dev->ir;
 346
 347         /* skip detach on non attached board */
 348
 349         if (!ir)
 350                 return 0;
 351
 352         rc_unregister_device(ir->rc);
 353
 354         if (ir->int_urb) {
 355                 usb_kill_urb(ir->int_urb);
 356                 kfree(ir->int_urb->transfer_buffer);
 357                 usb_free_urb(ir->int_urb);
 358                 ir->int_urb = NULL;
 359                 kfree(ir->urb_data);
 360                 ir->urb_data = NULL;
 361         }
 362
 363         kfree(ir);
 364         dev->ir = NULL;
 365
 366         return 0;
 367 }