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/ir-core.h>
  28 #include <media/ir-common.h>
  29
  30 #include "tm6000.h"
  31 #include "tm6000-regs.h"
  32
  33 static unsigned int ir_debug;
  34 module_param(ir_debug, int, 0644);
  35 MODULE_PARM_DESC(ir_debug, "enable debug message [IR]");
  36
  37 static unsigned int enable_ir = 1;
  38 module_param(enable_ir, int, 0644);
  39 MODULE_PARM_DESC(enable_ir, "enable ir (default is enable)");
  40
  41 #undef dprintk
  42
  43 #define dprintk(fmt, arg...) \
  44         if (ir_debug) { \
  45                 printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
  46         }
  47
  48 struct tm6000_ir_poll_result {
  49         u16 rc_data;
  50 };
  51
  52 struct tm6000_IR {
  53         struct tm6000_core      *dev;
  54         struct ir_input_dev     *input;
  55         struct ir_input_state   ir;
  56         char                    name[32];
  57         char                    phys[32];
  58
  59         /* poll expernal decoder */
  60         int                     polling;
  61         struct delayed_work     work;
  62         u8                      wait:1;
  63         u8                      key:1;
  64         struct urb              *int_urb;
  65         u8                      *urb_data;
  66
  67         int (*get_key) (struct tm6000_IR *, struct tm6000_ir_poll_result *);
  68
  69         /* IR device properties */
  70         struct ir_dev_props     props;
  71 };
  72
  73
  74 void tm6000_ir_wait(struct tm6000_core *dev, u8 state)
  75 {
  76         struct tm6000_IR *ir = dev->ir;
  77
  78         if (!dev->ir)
  79                 return;
  80
  81         if (state)
  82                 ir->wait = 1;
  83         else
  84                 ir->wait = 0;
  85 }
  86
  87
  88 static int tm6000_ir_config(struct tm6000_IR *ir)
  89 {
  90         struct tm6000_core *dev = ir->dev;
  91         u8 buf[10];
  92         int rc;
  93
  94         /* hack */
  95         buf[0] = 0xff;
  96         buf[1] = 0xff;
  97         buf[2] = 0xf2;
  98         buf[3] = 0x2b;
  99         buf[4] = 0x20;
 100         buf[5] = 0x35;
 101         buf[6] = 0x60;
 102         buf[7] = 0x04;
 103         buf[8] = 0xc0;
 104         buf[9] = 0x08;
 105
 106         rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
 107                 USB_RECIP_DEVICE, REQ_00_SET_IR_VALUE, 0, 0, buf, 0x0a);
 108         msleep(100);
 109
 110         if (rc < 0) {
 111                 printk(KERN_INFO "IR configuration failed");
 112                 return rc;
 113         }
 114         return 0;
 115 }
 116
 117 static void tm6000_ir_urb_received(struct urb *urb)
 118 {
 119         struct tm6000_core *dev = urb->context;
 120         struct tm6000_IR *ir = dev->ir;
 121         int rc;
 122
 123         if (urb->status != 0)
 124                 printk(KERN_INFO "not ready\n");
 125         else if (urb->actual_length > 0) {
 126                 memcpy(ir->urb_data, urb->transfer_buffer, urb->actual_length);
 127
 128                 dprintk("data %02x %02x %02x %02x\n", ir->urb_data[0],
 129                         ir->urb_data[1], ir->urb_data[2], ir->urb_data[3]);
 130
 131                 ir->key = 1;
 132         }
 133
 134         rc = usb_submit_urb(urb, GFP_ATOMIC);
 135 }
 136
 137 static int default_polling_getkey(struct tm6000_IR *ir,
 138                                 struct tm6000_ir_poll_result *poll_result)
 139 {
 140         struct tm6000_core *dev = ir->dev;
 141         int rc;
 142         u8 buf[2];
 143
 144         if (ir->wait && !&dev->int_in)
 145                 return 0;
 146
 147         if (&dev->int_in) {
 148                 if (ir->ir.ir_type == IR_TYPE_RC5)
 149                         poll_result->rc_data = ir->urb_data[0];
 150                 else
 151                         poll_result->rc_data = ir->urb_data[0] | ir->urb_data[1] << 8;
 152         } else {
 153                 tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 0);
 154                 msleep(10);
 155                 tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 1);
 156                 msleep(10);
 157
 158                 if (ir->ir.ir_type == IR_TYPE_RC5) {
 159                         rc = tm6000_read_write_usb(dev, USB_DIR_IN |
 160                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 161                                 REQ_02_GET_IR_CODE, 0, 0, buf, 1);
 162
 163                         msleep(10);
 164
 165                         dprintk("read data=%02x\n", buf[0]);
 166                         if (rc < 0)
 167                                 return rc;
 168
 169                         poll_result->rc_data = buf[0];
 170                 } else {
 171                         rc = tm6000_read_write_usb(dev, USB_DIR_IN |
 172                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 173                                 REQ_02_GET_IR_CODE, 0, 0, buf, 2);
 174
 175                         msleep(10);
 176
 177                         dprintk("read data=%04x\n", buf[0] | buf[1] << 8);
 178                         if (rc < 0)
 179                                 return rc;
 180
 181                         poll_result->rc_data = buf[0] | buf[1] << 8;
 182                 }
 183                 if ((poll_result->rc_data & 0x00ff) != 0xff)
 184                         ir->key = 1;
 185         }
 186         return 0;
 187 }
 188
 189 static void tm6000_ir_handle_key(struct tm6000_IR *ir)
 190 {
 191         int result;
 192         struct tm6000_ir_poll_result poll_result;
 193
 194         /* read the registers containing the IR status */
 195         result = ir->get_key(ir, &poll_result);
 196         if (result < 0) {
 197                 printk(KERN_INFO "ir->get_key() failed %d\n", result);
 198                 return;
 199         }
 200
 201         dprintk("ir->get_key result data=%04x\n", poll_result.rc_data);
 202
 203         if (ir->key) {
 204                 ir_input_keydown(ir->input->input_dev, &ir->ir,
 205                                 (u32)poll_result.rc_data);
 206
 207                 ir_input_nokey(ir->input->input_dev, &ir->ir);
 208                 ir->key = 0;
 209         }
 210         return;
 211 }
 212
 213 static void tm6000_ir_work(struct work_struct *work)
 214 {
 215         struct tm6000_IR *ir = container_of(work, struct tm6000_IR, work.work);
 216
 217         tm6000_ir_handle_key(ir);
 218         schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
 219 }
 220
 221 static int tm6000_ir_start(void *priv)
 222 {
 223         struct tm6000_IR *ir = priv;
 224
 225         INIT_DELAYED_WORK(&ir->work, tm6000_ir_work);
 226         schedule_delayed_work(&ir->work, 0);
 227
 228         return 0;
 229 }
 230
 231 static void tm6000_ir_stop(void *priv)
 232 {
 233         struct tm6000_IR *ir = priv;
 234
 235         cancel_delayed_work_sync(&ir->work);
 236 }
 237
 238 int tm6000_ir_change_protocol(void *priv, u64 ir_type)
 239 {
 240         struct tm6000_IR *ir = priv;
 241
 242         ir->get_key = default_polling_getkey;
 243
 244         tm6000_ir_config(ir);
 245         /* TODO */
 246         return 0;
 247 }
 248
 249 int tm6000_ir_init(struct tm6000_core *dev)
 250 {
 251         struct tm6000_IR *ir;
 252         struct ir_input_dev *ir_input_dev;
 253         int err = -ENOMEM;
 254         int pipe, size, rc;
 255
 256         if (!enable_ir)
 257                 return -ENODEV;
 258
 259         if (!dev->caps.has_remote)
 260                 return 0;
 261
 262         if (!dev->ir_codes)
 263                 return 0;
 264
 265         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 266         ir_input_dev = kzalloc(sizeof(*ir_input_dev), GFP_KERNEL);
 267         ir_input_dev->input_dev = input_allocate_device();
 268         if (!ir || !ir_input_dev || !ir_input_dev->input_dev)
 269                 goto err_out_free;
 270
 271         /* record handles to ourself */
 272         ir->dev = dev;
 273         dev->ir = ir;
 274
 275         ir->input = ir_input_dev;
 276
 277         /* input einrichten */
 278         ir->props.allowed_protos = IR_TYPE_RC5 | IR_TYPE_NEC;
 279         ir->props.priv = ir;
 280         ir->props.change_protocol = tm6000_ir_change_protocol;
 281         ir->props.open = tm6000_ir_start;
 282         ir->props.close = tm6000_ir_stop;
 283         ir->props.driver_type = RC_DRIVER_SCANCODE;
 284
 285         ir->polling = 50;
 286
 287         snprintf(ir->name, sizeof(ir->name), "tm5600/60x0 IR (%s)",
 288                                                 dev->name);
 289
 290         usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
 291         strlcat(ir->phys, "/input0", sizeof(ir->phys));
 292
 293         tm6000_ir_change_protocol(ir, IR_TYPE_UNKNOWN);
 294         err = ir_input_init(ir_input_dev->input_dev, &ir->ir, IR_TYPE_OTHER);
 295         if (err < 0)
 296                 goto err_out_free;
 297
 298         ir_input_dev->input_dev->name = ir->name;
 299         ir_input_dev->input_dev->phys = ir->phys;
 300         ir_input_dev->input_dev->id.bustype = BUS_USB;
 301         ir_input_dev->input_dev->id.version = 1;
 302         ir_input_dev->input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
 303         ir_input_dev->input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
 304
 305         ir_input_dev->input_dev->dev.parent = &dev->udev->dev;
 306
 307         if (&dev->int_in) {
 308                 dprintk("IR over int\n");
 309
 310                 ir->int_urb = usb_alloc_urb(0, GFP_KERNEL);
 311
 312                 pipe = usb_rcvintpipe(dev->udev,
 313                         dev->int_in.endp->desc.bEndpointAddress
 314                         & USB_ENDPOINT_NUMBER_MASK);
 315
 316                 size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 317                 dprintk("IR max size: %d\n", size);
 318
 319                 ir->int_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 320                 if (ir->int_urb->transfer_buffer == NULL) {
 321                         usb_free_urb(ir->int_urb);
 322                         goto err_out_stop;
 323                 }
 324                 dprintk("int interval: %d\n", dev->int_in.endp->desc.bInterval);
 325                 usb_fill_int_urb(ir->int_urb, dev->udev, pipe,
 326                         ir->int_urb->transfer_buffer, size,
 327                         tm6000_ir_urb_received, dev,
 328                         dev->int_in.endp->desc.bInterval);
 329                 rc = usb_submit_urb(ir->int_urb, GFP_KERNEL);
 330                 if (rc) {
 331                         kfree(ir->int_urb->transfer_buffer);
 332                         usb_free_urb(ir->int_urb);
 333                         err = rc;
 334                         goto err_out_stop;
 335                 }
 336                 ir->urb_data = kzalloc(size, GFP_KERNEL);
 337         }
 338
 339         /* ir register */
 340         err = ir_input_register(ir->input->input_dev, dev->ir_codes,
 341                 &ir->props, "tm6000");
 342         if (err)
 343                 goto err_out_stop;
 344
 345         return 0;
 346
 347 err_out_stop:
 348         dev->ir = NULL;
 349 err_out_free:
 350         kfree(ir_input_dev);
 351         kfree(ir);
 352         return err;
 353 }
 354
 355 int tm6000_ir_fini(struct tm6000_core *dev)
 356 {
 357         struct tm6000_IR *ir = dev->ir;
 358
 359         /* skip detach on non attached board */
 360
 361         if (!ir)
 362                 return 0;
 363
 364         ir_input_unregister(ir->input->input_dev);
 365
 366         if (ir->int_urb) {
 367                 usb_kill_urb(ir->int_urb);
 368                 kfree(ir->int_urb->transfer_buffer);
 369                 usb_free_urb(ir->int_urb);
 370                 ir->int_urb = NULL;
 371                 kfree(ir->urb_data);
 372                 ir->urb_data = NULL;
 373         }
 374
 375         kfree(ir->input);
 376         ir->input = NULL;
 377         kfree(ir);
 378         dev->ir = NULL;
 379
 380         return 0;
 381 }