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         u8 rc_data[4];
  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         struct urb              *int_urb;
  64         u8                      *urb_data;
  65         u8                      key:1;
  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         rc = usb_submit_urb(urb, GFP_ATOMIC);
 134 }
 135
 136 static int default_polling_getkey(struct tm6000_IR *ir,
 137                                 struct tm6000_ir_poll_result *poll_result)
 138 {
 139         struct tm6000_core *dev = ir->dev;
 140         int rc;
 141         u8 buf[2];
 142
 143         if (ir->wait && !&dev->int_in) {
 144                 poll_result->rc_data[0] = 0xff;
 145                 return 0;
 146         }
 147
 148         if (&dev->int_in) {
 149                 poll_result->rc_data[0] = ir->urb_data[0];
 150                 poll_result->rc_data[1] = ir->urb_data[1];
 151         } else {
 152                 tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 0);
 153                 msleep(10);
 154                 tm6000_set_reg(dev, REQ_04_EN_DISABLE_MCU_INT, 2, 1);
 155                 msleep(10);
 156
 157                 rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
 158                  USB_RECIP_DEVICE, REQ_02_GET_IR_CODE, 0, 0, buf, 1);
 159
 160                 msleep(10);
 161
 162                 dprintk("read data=%02x\n", buf[0]);
 163                 if (rc < 0)
 164                         return rc;
 165
 166                 poll_result->rc_data[0] = buf[0];
 167         }
 168         return 0;
 169 }
 170
 171 static void tm6000_ir_handle_key(struct tm6000_IR *ir)
 172 {
 173         int result;
 174         struct tm6000_ir_poll_result poll_result;
 175
 176         /* read the registers containing the IR status */
 177         result = ir->get_key(ir, &poll_result);
 178         if (result < 0) {
 179                 printk(KERN_INFO "ir->get_key() failed %d\n", result);
 180                 return;
 181         }
 182
 183         dprintk("ir->get_key result data=%02x %02x\n",
 184                 poll_result.rc_data[0], poll_result.rc_data[1]);
 185
 186         if (poll_result.rc_data[0] != 0xff && ir->key == 1) {
 187                 ir_input_keydown(ir->input->input_dev, &ir->ir,
 188                         poll_result.rc_data[0] | poll_result.rc_data[1] << 8);
 189
 190                 ir_input_nokey(ir->input->input_dev, &ir->ir);
 191                 ir->key = 0;
 192         }
 193         return;
 194 }
 195
 196 static void tm6000_ir_work(struct work_struct *work)
 197 {
 198         struct tm6000_IR *ir = container_of(work, struct tm6000_IR, work.work);
 199
 200         tm6000_ir_handle_key(ir);
 201         schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
 202 }
 203
 204 static int tm6000_ir_start(void *priv)
 205 {
 206         struct tm6000_IR *ir = priv;
 207
 208         INIT_DELAYED_WORK(&ir->work, tm6000_ir_work);
 209         schedule_delayed_work(&ir->work, 0);
 210
 211         return 0;
 212 }
 213
 214 static void tm6000_ir_stop(void *priv)
 215 {
 216         struct tm6000_IR *ir = priv;
 217
 218         cancel_delayed_work_sync(&ir->work);
 219 }
 220
 221 int tm6000_ir_change_protocol(void *priv, u64 ir_type)
 222 {
 223         struct tm6000_IR *ir = priv;
 224
 225         ir->get_key = default_polling_getkey;
 226
 227         tm6000_ir_config(ir);
 228         /* TODO */
 229         return 0;
 230 }
 231
 232 int tm6000_ir_init(struct tm6000_core *dev)
 233 {
 234         struct tm6000_IR *ir;
 235         struct ir_input_dev *ir_input_dev;
 236         int err = -ENOMEM;
 237         int pipe, size, rc;
 238
 239         if (!enable_ir)
 240                 return -ENODEV;
 241
 242         if (!dev->caps.has_remote)
 243                 return 0;
 244
 245         if (!dev->ir_codes)
 246                 return 0;
 247
 248         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
 249         ir_input_dev = kzalloc(sizeof(*ir_input_dev), GFP_KERNEL);
 250         ir_input_dev->input_dev = input_allocate_device();
 251         if (!ir || !ir_input_dev || !ir_input_dev->input_dev)
 252                 goto err_out_free;
 253
 254         /* record handles to ourself */
 255         ir->dev = dev;
 256         dev->ir = ir;
 257
 258         ir->input = ir_input_dev;
 259
 260         /* input einrichten */
 261         ir->props.allowed_protos = IR_TYPE_RC5 | IR_TYPE_NEC;
 262         ir->props.priv = ir;
 263         ir->props.change_protocol = tm6000_ir_change_protocol;
 264         ir->props.open = tm6000_ir_start;
 265         ir->props.close = tm6000_ir_stop;
 266         ir->props.driver_type = RC_DRIVER_SCANCODE;
 267
 268         ir->polling = 50;
 269
 270         snprintf(ir->name, sizeof(ir->name), "tm5600/60x0 IR (%s)",
 271                                                 dev->name);
 272
 273         usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
 274         strlcat(ir->phys, "/input0", sizeof(ir->phys));
 275
 276         tm6000_ir_change_protocol(ir, IR_TYPE_UNKNOWN);
 277         err = ir_input_init(ir_input_dev->input_dev, &ir->ir, IR_TYPE_OTHER);
 278         if (err < 0)
 279                 goto err_out_free;
 280
 281         ir_input_dev->input_dev->name = ir->name;
 282         ir_input_dev->input_dev->phys = ir->phys;
 283         ir_input_dev->input_dev->id.bustype = BUS_USB;
 284         ir_input_dev->input_dev->id.version = 1;
 285         ir_input_dev->input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
 286         ir_input_dev->input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
 287
 288         ir_input_dev->input_dev->dev.parent = &dev->udev->dev;
 289
 290         if (&dev->int_in) {
 291                 dprintk("IR over int\n");
 292
 293                 ir->int_urb = usb_alloc_urb(0, GFP_KERNEL);
 294
 295                 pipe = usb_rcvintpipe(dev->udev,
 296                         dev->int_in.endp->desc.bEndpointAddress
 297                         & USB_ENDPOINT_NUMBER_MASK);
 298
 299                 size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 300                 dprintk("IR max size: %d\n", size);
 301
 302                 ir->int_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 303                 if (ir->int_urb->transfer_buffer == NULL) {
 304                         usb_free_urb(ir->int_urb);
 305                         goto err_out_stop;
 306                 }
 307                 dprintk("int interval: %d\n", dev->int_in.endp->desc.bInterval);
 308                 usb_fill_int_urb(ir->int_urb, dev->udev, pipe,
 309                         ir->int_urb->transfer_buffer, size,
 310                         tm6000_ir_urb_received, dev,
 311                         dev->int_in.endp->desc.bInterval);
 312                 rc = usb_submit_urb(ir->int_urb, GFP_KERNEL);
 313                 if (rc) {
 314                         kfree(ir->int_urb->transfer_buffer);
 315                         usb_free_urb(ir->int_urb);
 316                         err = rc;
 317                         goto err_out_stop;
 318                 }
 319                 ir->urb_data = kzalloc(size, GFP_KERNEL);
 320         }
 321
 322         /* ir register */
 323         err = ir_input_register(ir->input->input_dev, dev->ir_codes,
 324                 &ir->props, "tm6000");
 325         if (err)
 326                 goto err_out_stop;
 327
 328         return 0;
 329
 330 err_out_stop:
 331         dev->ir = NULL;
 332 err_out_free:
 333         kfree(ir_input_dev);
 334         kfree(ir);
 335         return err;
 336 }
 337
 338 int tm6000_ir_fini(struct tm6000_core *dev)
 339 {
 340         struct tm6000_IR *ir = dev->ir;
 341
 342         /* skip detach on non attached board */
 343
 344         if (!ir)
 345                 return 0;
 346
 347         ir_input_unregister(ir->input->input_dev);
 348
 349         if (ir->int_urb) {
 350                 usb_kill_urb(ir->int_urb);
 351                 kfree(ir->int_urb->transfer_buffer);
 352                 usb_free_urb(ir->int_urb);
 353                 ir->int_urb = NULL;
 354                 kfree(ir->urb_data);
 355                 ir->urb_data = NULL;
 356         }
 357
 358         kfree(ir->input);
 359         ir->input = NULL;
 360         kfree(ir);
 361         dev->ir = NULL;
 362
 363         return 0;
 364 }