kernel/drivers/media/usb/dvb-usb-v2/ec168.c

   1 /*
   2  * E3C EC168 DVB USB driver
   3  *
   4  * Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
   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; either version 2 of the License, or
   9  *    (at your option) any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  *
  16  *    You should have received a copy of the GNU General Public License
  17  *    along with this program; if not, write to the Free Software
  18  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  */
  21
  22 #include "ec168.h"
  23 #include "ec100.h"
  24 #include "mxl5005s.h"
  25
  26 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  27
  28 static int ec168_ctrl_msg(struct dvb_usb_device *d, struct ec168_req *req)
  29 {
  30         int ret;
  31         unsigned int pipe;
  32         u8 request, requesttype;
  33         u8 *buf;
  34
  35         switch (req->cmd) {
  36         case DOWNLOAD_FIRMWARE:
  37         case GPIO:
  38         case WRITE_I2C:
  39         case STREAMING_CTRL:
  40                 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
  41                 request = req->cmd;
  42                 break;
  43         case READ_I2C:
  44                 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
  45                 request = req->cmd;
  46                 break;
  47         case GET_CONFIG:
  48                 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
  49                 request = CONFIG;
  50                 break;
  51         case SET_CONFIG:
  52                 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
  53                 request = CONFIG;
  54                 break;
  55         case WRITE_DEMOD:
  56                 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
  57                 request = DEMOD_RW;
  58                 break;
  59         case READ_DEMOD:
  60                 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
  61                 request = DEMOD_RW;
  62                 break;
  63         default:
  64                 dev_err(&d->udev->dev, "%s: unknown command=%02x\n",
  65                                 KBUILD_MODNAME, req->cmd);
  66                 ret = -EINVAL;
  67                 goto error;
  68         }
  69
  70         buf = kmalloc(req->size, GFP_KERNEL);
  71         if (!buf) {
  72                 ret = -ENOMEM;
  73                 goto error;
  74         }
  75
  76         if (requesttype == (USB_TYPE_VENDOR | USB_DIR_OUT)) {
  77                 /* write */
  78                 memcpy(buf, req->data, req->size);
  79                 pipe = usb_sndctrlpipe(d->udev, 0);
  80         } else {
  81                 /* read */
  82                 pipe = usb_rcvctrlpipe(d->udev, 0);
  83         }
  84
  85         msleep(1); /* avoid I2C errors */
  86
  87         ret = usb_control_msg(d->udev, pipe, request, requesttype, req->value,
  88                 req->index, buf, req->size, EC168_USB_TIMEOUT);
  89
  90         dvb_usb_dbg_usb_control_msg(d->udev, request, requesttype, req->value,
  91                         req->index, buf, req->size);
  92
  93         if (ret < 0)
  94                 goto err_dealloc;
  95         else
  96                 ret = 0;
  97
  98         /* read request, copy returned data to return buf */
  99         if (!ret && requesttype == (USB_TYPE_VENDOR | USB_DIR_IN))
 100                 memcpy(req->data, buf, req->size);
 101
 102         kfree(buf);
 103         return ret;
 104
 105 err_dealloc:
 106         kfree(buf);
 107 error:
 108         dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 109         return ret;
 110 }
 111
 112 /* I2C */
 113 static struct ec100_config ec168_ec100_config;
 114
 115 static int ec168_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
 116         int num)
 117 {
 118         struct dvb_usb_device *d = i2c_get_adapdata(adap);
 119         struct ec168_req req;
 120         int i = 0;
 121         int ret;
 122
 123         if (num > 2)
 124                 return -EINVAL;
 125
 126         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 127                 return -EAGAIN;
 128
 129         while (i < num) {
 130                 if (num > i + 1 && (msg[i+1].flags & I2C_M_RD)) {
 131                         if (msg[i].addr == ec168_ec100_config.demod_address) {
 132                                 req.cmd = READ_DEMOD;
 133                                 req.value = 0;
 134                                 req.index = 0xff00 + msg[i].buf[0]; /* reg */
 135                                 req.size = msg[i+1].len; /* bytes to read */
 136                                 req.data = &msg[i+1].buf[0];
 137                                 ret = ec168_ctrl_msg(d, &req);
 138                                 i += 2;
 139                         } else {
 140                                 dev_err(&d->udev->dev, "%s: I2C read not " \
 141                                                 "implemented\n",
 142                                                 KBUILD_MODNAME);
 143                                 ret = -EOPNOTSUPP;
 144                                 i += 2;
 145                         }
 146                 } else {
 147                         if (msg[i].addr == ec168_ec100_config.demod_address) {
 148                                 req.cmd = WRITE_DEMOD;
 149                                 req.value = msg[i].buf[1]; /* val */
 150                                 req.index = 0xff00 + msg[i].buf[0]; /* reg */
 151                                 req.size = 0;
 152                                 req.data = NULL;
 153                                 ret = ec168_ctrl_msg(d, &req);
 154                                 i += 1;
 155                         } else {
 156                                 req.cmd = WRITE_I2C;
 157                                 req.value = msg[i].buf[0]; /* val */
 158                                 req.index = 0x0100 + msg[i].addr; /* I2C addr */
 159                                 req.size = msg[i].len-1;
 160                                 req.data = &msg[i].buf[1];
 161                                 ret = ec168_ctrl_msg(d, &req);
 162                                 i += 1;
 163                         }
 164                 }
 165                 if (ret)
 166                         goto error;
 167
 168         }
 169         ret = i;
 170
 171 error:
 172         mutex_unlock(&d->i2c_mutex);
 173         return ret;
 174 }
 175
 176 static u32 ec168_i2c_func(struct i2c_adapter *adapter)
 177 {
 178         return I2C_FUNC_I2C;
 179 }
 180
 181 static struct i2c_algorithm ec168_i2c_algo = {
 182         .master_xfer   = ec168_i2c_xfer,
 183         .functionality = ec168_i2c_func,
 184 };
 185
 186 /* Callbacks for DVB USB */
 187 static int ec168_identify_state(struct dvb_usb_device *d, const char **name)
 188 {
 189         int ret;
 190         u8 reply;
 191         struct ec168_req req = {GET_CONFIG, 0, 1, sizeof(reply), &reply};
 192         dev_dbg(&d->udev->dev, "%s:\n", __func__);
 193
 194         ret = ec168_ctrl_msg(d, &req);
 195         if (ret)
 196                 goto error;
 197
 198         dev_dbg(&d->udev->dev, "%s: reply=%02x\n", __func__, reply);
 199
 200         if (reply == 0x01)
 201                 ret = WARM;
 202         else
 203                 ret = COLD;
 204
 205         return ret;
 206 error:
 207         dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 208         return ret;
 209 }
 210
 211 static int ec168_download_firmware(struct dvb_usb_device *d,
 212                 const struct firmware *fw)
 213 {
 214         int ret, len, remaining;
 215         struct ec168_req req = {DOWNLOAD_FIRMWARE, 0, 0, 0, NULL};
 216         dev_dbg(&d->udev->dev, "%s:\n", __func__);
 217
 218         #define LEN_MAX 2048 /* max packet size */
 219         for (remaining = fw->size; remaining > 0; remaining -= LEN_MAX) {
 220                 len = remaining;
 221                 if (len > LEN_MAX)
 222                         len = LEN_MAX;
 223
 224                 req.size = len;
 225                 req.data = (u8 *) &fw->data[fw->size - remaining];
 226                 req.index = fw->size - remaining;
 227
 228                 ret = ec168_ctrl_msg(d, &req);
 229                 if (ret) {
 230                         dev_err(&d->udev->dev,
 231                                         "%s: firmware download failed=%d\n",
 232                                         KBUILD_MODNAME, ret);
 233                         goto error;
 234                 }
 235         }
 236
 237         req.size = 0;
 238
 239         /* set "warm"? */
 240         req.cmd = SET_CONFIG;
 241         req.value = 0;
 242         req.index = 0x0001;
 243         ret = ec168_ctrl_msg(d, &req);
 244         if (ret)
 245                 goto error;
 246
 247         /* really needed - no idea what does */
 248         req.cmd = GPIO;
 249         req.value = 0;
 250         req.index = 0x0206;
 251         ret = ec168_ctrl_msg(d, &req);
 252         if (ret)
 253                 goto error;
 254
 255         /* activate tuner I2C? */
 256         req.cmd = WRITE_I2C;
 257         req.value = 0;
 258         req.index = 0x00c6;
 259         ret = ec168_ctrl_msg(d, &req);
 260         if (ret)
 261                 goto error;
 262
 263         return ret;
 264 error:
 265         dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
 266         return ret;
 267 }
 268
 269 static struct ec100_config ec168_ec100_config = {
 270         .demod_address = 0xff, /* not real address, demod is integrated */
 271 };
 272
 273 static int ec168_ec100_frontend_attach(struct dvb_usb_adapter *adap)
 274 {
 275         struct dvb_usb_device *d = adap_to_d(adap);
 276         dev_dbg(&d->udev->dev, "%s:\n", __func__);
 277
 278         adap->fe[0] = dvb_attach(ec100_attach, &ec168_ec100_config,
 279                         &d->i2c_adap);
 280         if (adap->fe[0] == NULL)
 281                 return -ENODEV;
 282
 283         return 0;
 284 }
 285
 286 static struct mxl5005s_config ec168_mxl5003s_config = {
 287         .i2c_address     = 0xc6,
 288         .if_freq         = IF_FREQ_4570000HZ,
 289         .xtal_freq       = CRYSTAL_FREQ_16000000HZ,
 290         .agc_mode        = MXL_SINGLE_AGC,
 291         .tracking_filter = MXL_TF_OFF,
 292         .rssi_enable     = MXL_RSSI_ENABLE,
 293         .cap_select      = MXL_CAP_SEL_ENABLE,
 294         .div_out         = MXL_DIV_OUT_4,
 295         .clock_out       = MXL_CLOCK_OUT_DISABLE,
 296         .output_load     = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
 297         .top             = MXL5005S_TOP_25P2,
 298         .mod_mode        = MXL_DIGITAL_MODE,
 299         .if_mode         = MXL_ZERO_IF,
 300         .AgcMasterByte   = 0x00,
 301 };
 302
 303 static int ec168_mxl5003s_tuner_attach(struct dvb_usb_adapter *adap)
 304 {
 305         struct dvb_usb_device *d = adap_to_d(adap);
 306         dev_dbg(&d->udev->dev, "%s:\n", __func__);
 307
 308         return dvb_attach(mxl5005s_attach, adap->fe[0], &d->i2c_adap,
 309                         &ec168_mxl5003s_config) == NULL ? -ENODEV : 0;
 310 }
 311
 312 static int ec168_streaming_ctrl(struct dvb_frontend *fe, int onoff)
 313 {
 314         struct dvb_usb_device *d = fe_to_d(fe);
 315         struct ec168_req req = {STREAMING_CTRL, 0x7f01, 0x0202, 0, NULL};
 316         dev_dbg(&d->udev->dev, "%s: onoff=%d\n", __func__, onoff);
 317
 318         if (onoff)
 319                 req.index = 0x0102;
 320         return ec168_ctrl_msg(d, &req);
 321 }
 322
 323 /* DVB USB Driver stuff */
 324 /* bInterfaceNumber 0 is HID
 325  * bInterfaceNumber 1 is DVB-T */
 326 static struct dvb_usb_device_properties ec168_props = {
 327         .driver_name = KBUILD_MODNAME,
 328         .owner = THIS_MODULE,
 329         .adapter_nr = adapter_nr,
 330         .bInterfaceNumber = 1,
 331
 332         .identify_state = ec168_identify_state,
 333         .firmware = EC168_FIRMWARE,
 334         .download_firmware = ec168_download_firmware,
 335
 336         .i2c_algo = &ec168_i2c_algo,
 337         .frontend_attach = ec168_ec100_frontend_attach,
 338         .tuner_attach = ec168_mxl5003s_tuner_attach,
 339         .streaming_ctrl = ec168_streaming_ctrl,
 340
 341         .num_adapters = 1,
 342         .adapter = {
 343                 {
 344                         .stream = DVB_USB_STREAM_BULK(0x82, 6, 32 * 512),
 345                 }
 346         },
 347 };
 348
 349 static const struct dvb_usb_driver_info ec168_driver_info = {
 350         .name = "E3C EC168 reference design",
 351         .props = &ec168_props,
 352 };
 353
 354 static const struct usb_device_id ec168_id[] = {
 355         { USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168),
 356                 .driver_info = (kernel_ulong_t) &ec168_driver_info },
 357         { USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_2),
 358                 .driver_info = (kernel_ulong_t) &ec168_driver_info },
 359         { USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_3),
 360                 .driver_info = (kernel_ulong_t) &ec168_driver_info },
 361         { USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_4),
 362                 .driver_info = (kernel_ulong_t) &ec168_driver_info },
 363         { USB_DEVICE(USB_VID_E3C, USB_PID_E3C_EC168_5),
 364                 .driver_info = (kernel_ulong_t) &ec168_driver_info },
 365         {}
 366 };
 367 MODULE_DEVICE_TABLE(usb, ec168_id);
 368
 369 static struct usb_driver ec168_driver = {
 370         .name = KBUILD_MODNAME,
 371         .id_table = ec168_id,
 372         .probe = dvb_usbv2_probe,
 373         .disconnect = dvb_usbv2_disconnect,
 374         .suspend = dvb_usbv2_suspend,
 375         .resume = dvb_usbv2_resume,
 376         .no_dynamic_id = 1,
 377         .soft_unbind = 1,
 378 };
 379
 380 module_usb_driver(ec168_driver);
 381
 382 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 383 MODULE_DESCRIPTION("E3C EC168 driver");
 384 MODULE_LICENSE("GPL");
 385 MODULE_FIRMWARE(EC168_FIRMWARE);