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 /* number of 50ms for ON-OFF-ON power led */
  41 /* show IR activity */
  42 #define PWLED_OFF 2
  43
  44 #undef dprintk
  45
  46 #define dprintk(fmt, arg...) \
  47         if (ir_debug) { \
  48                 printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
  49         }
  50
  51 struct tm6000_ir_poll_result {
  52         u16 rc_data;
  53 };
  54
  55 struct tm6000_IR {
  56         struct tm6000_core      *dev;
  57         struct rc_dev           *rc;
  58         char                    name[32];
  59         char                    phys[32];
  60
  61         /* poll expernal decoder */
  62         int                     polling;
  63         struct delayed_work     work;
  64         u8                      wait:1;
  65         u8                      key:1;
  66         u8                      pwled:1;
  67         u8                      pwledcnt;
  68         u16                     key_addr;
  69         struct urb              *int_urb;
  70         u8                      *urb_data;
  71
  72         int (*get_key) (struct tm6000_IR *, struct tm6000_ir_poll_result *);
  73
  74         /* IR device properties */
  75         u64                     rc_type;
  76 };
  77
  78
  79 void tm6000_ir_wait(struct tm6000_core *dev, u8 state)
  80 {
  81         struct tm6000_IR *ir = dev->ir;
  82
  83         if (!dev->ir)
  84                 return;
  85
  86         if (state)
  87                 ir->wait = 1;
  88         else
  89                 ir->wait = 0;
  90 }
  91
  92
  93 static int tm6000_ir_config(struct tm6000_IR *ir)
  94 {
  95         struct tm6000_core *dev = ir->dev;
  96         u8 buf[10];
  97         int rc;
  98
  99         switch (ir->rc_type) {
 100         case RC_TYPE_NEC:
 101                 /* Setup IR decoder for NEC standard 12MHz system clock */
 102                 /* IR_LEADER_CNT = 0.9ms             */
 103                 tm6000_set_reg(dev, TM6010_REQ07_RD8_IR_LEADER1, 0xaa);
 104                 tm6000_set_reg(dev, TM6010_REQ07_RD8_IR_LEADER0, 0x30);
 105                 /* IR_PULSE_CNT = 0.7ms              */
 106                 tm6000_set_reg(dev, TM6010_REQ07_RD8_IR_PULSE_CNT1, 0x20);
 107                 tm6000_set_reg(dev, TM6010_REQ07_RD8_IR_PULSE_CNT0, 0xd0);
 108                 /* Remote WAKEUP = enable */
 109                 tm6000_set_reg(dev, TM6010_REQ07_RE5_REMOTE_WAKEUP, 0xfe);
 110                 /* IR_WKUP_SEL = Low byte in decoded IR data */
 111                 tm6000_set_reg(dev, TM6010_REQ07_RD8_IR_WAKEUP_SEL, 0xff);
 112                 /* IR_WKU_ADD code */
 113                 tm6000_set_reg(dev, TM6010_REQ07_RD8_IR_WAKEUP_ADD, 0xff);
 114                 tm6000_flash_led(dev, 0);
 115                 msleep(100);
 116                 tm6000_flash_led(dev, 1);
 117                 break;
 118         default:
 119                 /* hack */
 120                 buf[0] = 0xff;
 121                 buf[1] = 0xff;
 122                 buf[2] = 0xf2;
 123                 buf[3] = 0x2b;
 124                 buf[4] = 0x20;
 125                 buf[5] = 0x35;
 126                 buf[6] = 0x60;
 127                 buf[7] = 0x04;
 128                 buf[8] = 0xc0;
 129                 buf[9] = 0x08;
 130
 131                 rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
 132                         USB_RECIP_DEVICE, REQ_00_SET_IR_VALUE, 0, 0, buf, 0x0a);
 133                 msleep(100);
 134
 135                 if (rc < 0) {
 136                         printk(KERN_INFO "IR configuration failed");
 137                         return rc;
 138                 }
 139                 break;
 140         }
 141
 142         return 0;
 143 }
 144
 145 static void tm6000_ir_urb_received(struct urb *urb)
 146 {
 147         struct tm6000_core *dev = urb->context;
 148         struct tm6000_IR *ir = dev->ir;
 149         int rc;
 150
 151         if (urb->status != 0)
 152                 printk(KERN_INFO "not ready\n");
 153         else if (urb->actual_length > 0) {
 154                 memcpy(ir->urb_data, urb->transfer_buffer, urb->actual_length);
 155
 156                 dprintk("data %02x %02x %02x %02x\n", ir->urb_data[0],
 157                         ir->urb_data[1], ir->urb_data[2], ir->urb_data[3]);
 158
 159                 ir->key = 1;
 160         }
 161
 162         rc = usb_submit_urb(urb, GFP_ATOMIC);
 163 }
 164
 165 static int default_polling_getkey(struct tm6000_IR *ir,
 166                                 struct tm6000_ir_poll_result *poll_result)
 167 {
 168         struct tm6000_core *dev = ir->dev;
 169         int rc;
 170         u8 buf[2];
 171
 172         if (ir->wait && !&dev->int_in)
 173                 return 0;
 174
 175         if (&dev->int_in) {
 176                 switch (ir->rc_type) {
 177                 case RC_TYPE_RC5:
 178                         poll_result->rc_data = ir->urb_data[0];
 179                         break;
 180                 case RC_TYPE_NEC:
 181                         if (ir->urb_data[1] == ((ir->key_addr >> 8) & 0xff)) {
 182                                 poll_result->rc_data = ir->urb_data[0]
 183                                                         | ir->urb_data[1] << 8;
 184                         }
 185                         break;
 186                 default:
 187                         poll_result->rc_data = ir->urb_data[0]
 188                                         | ir->urb_data[1] << 8;
 189                         break;
 190                 }
 191         } else {
 192                 tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 0);
 193                 msleep(10);
 194                 tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 1);
 195                 msleep(10);
 196
 197                 if (ir->rc_type == RC_TYPE_RC5) {
 198                         rc = tm6000_read_write_usb(dev, USB_DIR_IN |
 199                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 200                                 REQ_02_GET_IR_CODE, 0, 0, buf, 1);
 201
 202                         msleep(10);
 203
 204                         dprintk("read data=%02x\n", buf[0]);
 205                         if (rc < 0)
 206                                 return rc;
 207
 208                         poll_result->rc_data = buf[0];
 209                 } else {
 210                         rc = tm6000_read_write_usb(dev, USB_DIR_IN |
 211                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 212                                 REQ_02_GET_IR_CODE, 0, 0, buf, 2);
 213
 214                         msleep(10);
 215
 216                         dprintk("read data=%04x\n", buf[0] | buf[1] << 8);
 217                         if (rc < 0)
 218                                 return rc;
 219
 220                         poll_result->rc_data = buf[0] | buf[1] << 8;
 221                 }
 222                 if ((poll_result->rc_data & 0x00ff) != 0xff)
 223                         ir->key = 1;
 224         }
 225         return 0;
 226 }
 227
 228 static void tm6000_ir_handle_key(struct tm6000_IR *ir)
 229 {
 230         struct tm6000_core *dev = ir->dev;
 231         int result;
 232         struct tm6000_ir_poll_result poll_result;
 233
 234         /* read the registers containing the IR status */
 235         result = ir->get_key(ir, &poll_result);
 236         if (result < 0) {
 237                 printk(KERN_INFO "ir->get_key() failed %d\n", result);
 238                 return;
 239         }
 240
 241         dprintk("ir->get_key result data=%04x\n", poll_result.rc_data);
 242
 243         if (ir->pwled) {
 244                 if (ir->pwledcnt >= PWLED_OFF) {
 245                         ir->pwled = 0;
 246                         ir->pwledcnt = 0;
 247                         tm6000_flash_led(dev, 1);
 248                 } else
 249                         ir->pwledcnt += 1;
 250         }
 251
 252         if (ir->key) {
 253                 rc_keydown(ir->rc, poll_result.rc_data, 0);
 254                 ir->key = 0;
 255                 ir->pwled = 1;
 256                 ir->pwledcnt = 0;
 257                 tm6000_flash_led(dev, 0);
 258         }
 259         return;
 260 }
 261
 262 static void tm6000_ir_work(struct work_struct *work)
 263 {
 264         struct tm6000_IR *ir = container_of(work, struct tm6000_IR, work.work);
 265
 266         tm6000_ir_handle_key(ir);
 267         schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
 268 }
 269
 270 static int tm6000_ir_start(struct rc_dev *rc)
 271 {
 272         struct tm6000_IR *ir = rc->priv;
 273
 274         INIT_DELAYED_WORK(&ir->work, tm6000_ir_work);
 275         schedule_delayed_work(&ir->work, 0);
 276
 277         return 0;
 278 }
 279
 280 static void tm6000_ir_stop(struct rc_dev *rc)
 281 {
 282         struct tm6000_IR *ir = rc->priv;
 283
 284         cancel_delayed_work_sync(&ir->work);
 285 }
 286
 287 int tm6000_ir_change_protocol(struct rc_dev *rc, u64 rc_type)
 288 {
 289         struct tm6000_IR *ir = rc->priv;
 290
 291         if (!ir)
 292                 return 0;
 293
 294         if ((rc->rc_map.scan) && (rc_type == RC_TYPE_NEC))
 295                 ir->key_addr = ((rc->rc_map.scan[0].scancode >> 8) & 0xffff);
 296
 297         ir->get_key = default_polling_getkey;
 298         ir->rc_type = rc_type;
 299
 300         tm6000_ir_config(ir);
 301         /* TODO */
 302         return 0;
 303 }
 304
 305 int tm6000_ir_int_start(struct tm6000_core *dev)
 306 {
 307         struct tm6000_IR *ir = dev->ir;
 308         int pipe, size;
 309         int err = -ENOMEM;
 310
 311
 312         if (!ir)
 313                 return -ENODEV;
 314
 315         ir->int_urb = usb_alloc_urb(0, GFP_KERNEL);
 316         if (!ir->int_urb)
 317                 return -ENOMEM;
 318
 319         pipe = usb_rcvintpipe(dev->udev,
 320                 dev->int_in.endp->desc.bEndpointAddress
 321                 & USB_ENDPOINT_NUMBER_MASK);
 322
 323         size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 324         dprintk("IR max size: %d\n", size);
 325
 326         ir->int_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 327         if (ir->int_urb->transfer_buffer == NULL) {
 328                 usb_free_urb(ir->int_urb);
 329                 return err;
 330         }
 331         dprintk("int interval: %d\n", dev->int_in.endp->desc.bInterval);
 332         usb_fill_int_urb(ir->int_urb, dev->udev, pipe,
 333                 ir->int_urb->transfer_buffer, size,
 334                 tm6000_ir_urb_received, dev,
 335                 dev->int_in.endp->desc.bInterval);
 336         err = usb_submit_urb(ir->int_urb, GFP_KERNEL);
 337         if (err) {
 338                 kfree(ir->int_urb->transfer_buffer);
 339                 usb_free_urb(ir->int_urb);
 340                 return err;
 341         }
 342         ir->urb_data = kzalloc(size, GFP_KERNEL);
 343
 344         return 0;
 345 }
 346
 347 void tm6000_ir_int_stop(struct tm6000_core *dev)
 348 {
 349         struct tm6000_IR *ir = dev->ir;
 350
 351         if (!ir)
 352                 return;
 353
 354         usb_kill_urb(ir->int_urb);
 355         kfree(ir->int_urb->transfer_buffer);
 356         usb_free_urb(ir->int_urb);
 357         ir->int_urb = NULL;
 358         kfree(ir->urb_data);
 359         ir->urb_data = NULL;
 360 }
 361
 362 int tm6000_ir_init(struct tm6000_core *dev)
 363 {
 364         struct tm6000_IR *ir;
 365         struct rc_dev *rc;
 366         int err = -ENOMEM;
 367
 368         if (!enable_ir)
 369                 return -ENODEV;
 370
 371         if (!dev->caps.has_remote)
 372                 return 0;
 373
 374         if (!dev->ir_codes)
 375                 return 0;
 376
 377         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 378         rc = rc_allocate_device();
 379         if (!ir || !rc)
 380                 goto out;
 381
 382         /* record handles to ourself */
 383         ir->dev = dev;
 384         dev->ir = ir;
 385         ir->rc = rc;
 386
 387         /* input einrichten */
 388         rc->allowed_protos = RC_TYPE_RC5 | RC_TYPE_NEC;
 389         rc->priv = ir;
 390         rc->change_protocol = tm6000_ir_change_protocol;
 391         rc->open = tm6000_ir_start;
 392         rc->close = tm6000_ir_stop;
 393         rc->driver_type = RC_DRIVER_SCANCODE;
 394
 395         ir->polling = 50;
 396         ir->pwled = 0;
 397         ir->pwledcnt = 0;
 398
 399
 400         snprintf(ir->name, sizeof(ir->name), "tm5600/60x0 IR (%s)",
 401                                                 dev->name);
 402
 403         usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
 404         strlcat(ir->phys, "/input0", sizeof(ir->phys));
 405
 406         tm6000_ir_change_protocol(rc, RC_TYPE_UNKNOWN);
 407
 408         rc->input_name = ir->name;
 409         rc->input_phys = ir->phys;
 410         rc->input_id.bustype = BUS_USB;
 411         rc->input_id.version = 1;
 412         rc->input_id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
 413         rc->input_id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
 414         rc->map_name = dev->ir_codes;
 415         rc->driver_name = "tm6000";
 416         rc->dev.parent = &dev->udev->dev;
 417
 418         if (&dev->int_in) {
 419                 dprintk("IR over int\n");
 420
 421                 err = tm6000_ir_int_start(dev);
 422
 423                 if (err)
 424                         goto out;
 425         }
 426
 427         /* ir register */
 428         err = rc_register_device(rc);
 429         if (err)
 430                 goto out;
 431
 432         return 0;
 433
 434 out:
 435         dev->ir = NULL;
 436         rc_free_device(rc);
 437         kfree(ir);
 438         return err;
 439 }
 440
 441 int tm6000_ir_fini(struct tm6000_core *dev)
 442 {
 443         struct tm6000_IR *ir = dev->ir;
 444
 445         /* skip detach on non attached board */
 446
 447         if (!ir)
 448                 return 0;
 449
 450         rc_unregister_device(ir->rc);
 451
 452         if (ir->int_urb) {
 453                 tm6000_ir_int_stop(dev);
 454         }
 455
 456         kfree(ir);
 457         dev->ir = NULL;
 458
 459         return 0;
 460 }