kernel/drivers/media/common/b2c2/flexcop.c

   1 /*
   2  * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
   3  * flexcop.c - main module part
   4  * Copyright (C) 2004-9 Patrick Boettcher <patrick.boettcher@desy.de>
   5  * based on skystar2-driver Copyright (C) 2003 Vadim Catana, skystar@moldova.cc
   6  *
   7  * Acknowledgements:
   8  *   John Jurrius from BBTI, Inc. for extensive support
   9  *                    with code examples and data books
  10  *   Bjarne Steinsbo, bjarne at steinsbo.com (some ideas for rewriting)
  11  *
  12  * Contributions to the skystar2-driver have been done by
  13  *   Vincenzo Di Massa, hawk.it at tiscalinet.it (several DiSEqC fixes)
  14  *   Roberto Ragusa, r.ragusa at libero.it (polishing, restyling the code)
  15  *   Uwe Bugla, uwe.bugla at gmx.de (doing tests, restyling code, writing docu)
  16  *   Niklas Peinecke, peinecke at gdv.uni-hannover.de (hardware pid/mac
  17  *               filtering)
  18  *
  19  * This program is free software; you can redistribute it and/or
  20  * modify it under the terms of the GNU Lesser General Public License
  21  * as published by the Free Software Foundation; either version 2.1
  22  * of the License, or (at your option) any later version.
  23  *
  24  * This program is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  * GNU General Public License for more details.
  28  *
  29  * You should have received a copy of the GNU Lesser General Public License
  30  * along with this program; if not, write to the Free Software
  31  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  32  */
  33
  34 #include "flexcop.h"
  35
  36 #define DRIVER_NAME "B2C2 FlexcopII/II(b)/III digital TV receiver chip"
  37 #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de"
  38
  39 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
  40 #define DEBSTATUS ""
  41 #else
  42 #define DEBSTATUS " (debugging is not enabled)"
  43 #endif
  44
  45 int b2c2_flexcop_debug;
  46 EXPORT_SYMBOL_GPL(b2c2_flexcop_debug);
  47 module_param_named(debug, b2c2_flexcop_debug,  int, 0644);
  48 MODULE_PARM_DESC(debug,
  49                 "set debug level (1=info,2=tuner,4=i2c,8=ts,"
  50                 "16=sram,32=reg (|-able))."
  51                 DEBSTATUS);
  52 #undef DEBSTATUS
  53
  54 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  55
  56 /* global zero for ibi values */
  57 flexcop_ibi_value ibi_zero;
  58
  59 static int flexcop_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  60 {
  61         struct flexcop_device *fc = dvbdmxfeed->demux->priv;
  62         return flexcop_pid_feed_control(fc, dvbdmxfeed, 1);
  63 }
  64
  65 static int flexcop_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  66 {
  67         struct flexcop_device *fc = dvbdmxfeed->demux->priv;
  68         return flexcop_pid_feed_control(fc, dvbdmxfeed, 0);
  69 }
  70
  71 static int flexcop_dvb_init(struct flexcop_device *fc)
  72 {
  73         int ret = dvb_register_adapter(&fc->dvb_adapter,
  74                         "FlexCop Digital TV device", fc->owner,
  75                         fc->dev, adapter_nr);
  76         if (ret < 0) {
  77                 err("error registering DVB adapter");
  78                 return ret;
  79         }
  80         fc->dvb_adapter.priv = fc;
  81
  82         fc->demux.dmx.capabilities = (DMX_TS_FILTERING | DMX_SECTION_FILTERING
  83                         | DMX_MEMORY_BASED_FILTERING);
  84         fc->demux.priv = fc;
  85         fc->demux.filternum = fc->demux.feednum = FC_MAX_FEED;
  86         fc->demux.start_feed = flexcop_dvb_start_feed;
  87         fc->demux.stop_feed = flexcop_dvb_stop_feed;
  88         fc->demux.write_to_decoder = NULL;
  89
  90         ret = dvb_dmx_init(&fc->demux);
  91         if (ret < 0) {
  92                 err("dvb_dmx failed: error %d", ret);
  93                 goto err_dmx;
  94         }
  95
  96         fc->hw_frontend.source = DMX_FRONTEND_0;
  97
  98         fc->dmxdev.filternum = fc->demux.feednum;
  99         fc->dmxdev.demux = &fc->demux.dmx;
 100         fc->dmxdev.capabilities = 0;
 101         ret = dvb_dmxdev_init(&fc->dmxdev, &fc->dvb_adapter);
 102         if (ret < 0) {
 103                 err("dvb_dmxdev_init failed: error %d", ret);
 104                 goto err_dmx_dev;
 105         }
 106
 107         ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->hw_frontend);
 108         if (ret < 0) {
 109                 err("adding hw_frontend to dmx failed: error %d", ret);
 110                 goto err_dmx_add_hw_frontend;
 111         }
 112
 113         fc->mem_frontend.source = DMX_MEMORY_FE;
 114         ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->mem_frontend);
 115         if (ret < 0) {
 116                 err("adding mem_frontend to dmx failed: error %d", ret);
 117                 goto err_dmx_add_mem_frontend;
 118         }
 119
 120         ret = fc->demux.dmx.connect_frontend(&fc->demux.dmx, &fc->hw_frontend);
 121         if (ret < 0) {
 122                 err("connect frontend failed: error %d", ret);
 123                 goto err_connect_frontend;
 124         }
 125
 126         ret = dvb_net_init(&fc->dvb_adapter, &fc->dvbnet, &fc->demux.dmx);
 127         if (ret < 0) {
 128                 err("dvb_net_init failed: error %d", ret);
 129                 goto err_net;
 130         }
 131
 132         fc->init_state |= FC_STATE_DVB_INIT;
 133         return 0;
 134
 135 err_net:
 136         fc->demux.dmx.disconnect_frontend(&fc->demux.dmx);
 137 err_connect_frontend:
 138         fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->mem_frontend);
 139 err_dmx_add_mem_frontend:
 140         fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->hw_frontend);
 141 err_dmx_add_hw_frontend:
 142         dvb_dmxdev_release(&fc->dmxdev);
 143 err_dmx_dev:
 144         dvb_dmx_release(&fc->demux);
 145 err_dmx:
 146         dvb_unregister_adapter(&fc->dvb_adapter);
 147         return ret;
 148 }
 149
 150 static void flexcop_dvb_exit(struct flexcop_device *fc)
 151 {
 152         if (fc->init_state & FC_STATE_DVB_INIT) {
 153                 dvb_net_release(&fc->dvbnet);
 154
 155                 fc->demux.dmx.close(&fc->demux.dmx);
 156                 fc->demux.dmx.remove_frontend(&fc->demux.dmx,
 157                         &fc->mem_frontend);
 158                 fc->demux.dmx.remove_frontend(&fc->demux.dmx,
 159                         &fc->hw_frontend);
 160                 dvb_dmxdev_release(&fc->dmxdev);
 161                 dvb_dmx_release(&fc->demux);
 162                 dvb_unregister_adapter(&fc->dvb_adapter);
 163                 deb_info("deinitialized dvb stuff\n");
 164         }
 165         fc->init_state &= ~FC_STATE_DVB_INIT;
 166 }
 167
 168 /* these methods are necessary to achieve the long-term-goal of hiding the
 169  * struct flexcop_device from the bus-parts */
 170 void flexcop_pass_dmx_data(struct flexcop_device *fc, u8 *buf, u32 len)
 171 {
 172         dvb_dmx_swfilter(&fc->demux, buf, len);
 173 }
 174 EXPORT_SYMBOL(flexcop_pass_dmx_data);
 175
 176 void flexcop_pass_dmx_packets(struct flexcop_device *fc, u8 *buf, u32 no)
 177 {
 178         dvb_dmx_swfilter_packets(&fc->demux, buf, no);
 179 }
 180 EXPORT_SYMBOL(flexcop_pass_dmx_packets);
 181
 182 static void flexcop_reset(struct flexcop_device *fc)
 183 {
 184         flexcop_ibi_value v210, v204;
 185
 186         /* reset the flexcop itself */
 187         fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
 188
 189         v210.raw = 0;
 190         v210.sw_reset_210.reset_block_000 = 1;
 191         v210.sw_reset_210.reset_block_100 = 1;
 192         v210.sw_reset_210.reset_block_200 = 1;
 193         v210.sw_reset_210.reset_block_300 = 1;
 194         v210.sw_reset_210.reset_block_400 = 1;
 195         v210.sw_reset_210.reset_block_500 = 1;
 196         v210.sw_reset_210.reset_block_600 = 1;
 197         v210.sw_reset_210.reset_block_700 = 1;
 198         v210.sw_reset_210.Block_reset_enable = 0xb2;
 199         v210.sw_reset_210.Special_controls = 0xc259;
 200         fc->write_ibi_reg(fc,sw_reset_210,v210);
 201         msleep(1);
 202
 203         /* reset the periphical devices */
 204
 205         v204 = fc->read_ibi_reg(fc,misc_204);
 206         v204.misc_204.Per_reset_sig = 0;
 207         fc->write_ibi_reg(fc,misc_204,v204);
 208         msleep(1);
 209         v204.misc_204.Per_reset_sig = 1;
 210         fc->write_ibi_reg(fc,misc_204,v204);
 211 }
 212
 213 void flexcop_reset_block_300(struct flexcop_device *fc)
 214 {
 215         flexcop_ibi_value v208_save = fc->read_ibi_reg(fc, ctrl_208),
 216                           v210 = fc->read_ibi_reg(fc, sw_reset_210);
 217
 218         deb_rdump("208: %08x, 210: %08x\n", v208_save.raw, v210.raw);
 219         fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
 220
 221         v210.sw_reset_210.reset_block_300 = 1;
 222         v210.sw_reset_210.Block_reset_enable = 0xb2;
 223
 224         fc->write_ibi_reg(fc,sw_reset_210,v210);
 225         fc->write_ibi_reg(fc,ctrl_208,v208_save);
 226 }
 227
 228 struct flexcop_device *flexcop_device_kmalloc(size_t bus_specific_len)
 229 {
 230         void *bus;
 231         struct flexcop_device *fc = kzalloc(sizeof(struct flexcop_device),
 232                                 GFP_KERNEL);
 233         if (!fc) {
 234                 err("no memory");
 235                 return NULL;
 236         }
 237
 238         bus = kzalloc(bus_specific_len, GFP_KERNEL);
 239         if (!bus) {
 240                 err("no memory");
 241                 kfree(fc);
 242                 return NULL;
 243         }
 244
 245         fc->bus_specific = bus;
 246
 247         return fc;
 248 }
 249 EXPORT_SYMBOL(flexcop_device_kmalloc);
 250
 251 void flexcop_device_kfree(struct flexcop_device *fc)
 252 {
 253         kfree(fc->bus_specific);
 254         kfree(fc);
 255 }
 256 EXPORT_SYMBOL(flexcop_device_kfree);
 257
 258 int flexcop_device_initialize(struct flexcop_device *fc)
 259 {
 260         int ret;
 261         ibi_zero.raw = 0;
 262
 263         flexcop_reset(fc);
 264         flexcop_determine_revision(fc);
 265         flexcop_sram_init(fc);
 266         flexcop_hw_filter_init(fc);
 267         flexcop_smc_ctrl(fc, 0);
 268
 269         ret = flexcop_dvb_init(fc);
 270         if (ret)
 271                 goto error;
 272
 273         /* i2c has to be done before doing EEProm stuff -
 274          * because the EEProm is accessed via i2c */
 275         ret = flexcop_i2c_init(fc);
 276         if (ret)
 277                 goto error;
 278
 279         /* do the MAC address reading after initializing the dvb_adapter */
 280         if (fc->get_mac_addr(fc, 0) == 0) {
 281                 u8 *b = fc->dvb_adapter.proposed_mac;
 282                 info("MAC address = %pM", b);
 283                 flexcop_set_mac_filter(fc,b);
 284                 flexcop_mac_filter_ctrl(fc,1);
 285         } else
 286                 warn("reading of MAC address failed.\n");
 287
 288         ret = flexcop_frontend_init(fc);
 289         if (ret)
 290                 goto error;
 291
 292         flexcop_device_name(fc,"initialization of","complete");
 293         return 0;
 294
 295 error:
 296         flexcop_device_exit(fc);
 297         return ret;
 298 }
 299 EXPORT_SYMBOL(flexcop_device_initialize);
 300
 301 void flexcop_device_exit(struct flexcop_device *fc)
 302 {
 303         flexcop_frontend_exit(fc);
 304         flexcop_i2c_exit(fc);
 305         flexcop_dvb_exit(fc);
 306 }
 307 EXPORT_SYMBOL(flexcop_device_exit);
 308
 309 static int flexcop_module_init(void)
 310 {
 311         info(DRIVER_NAME " loaded successfully");
 312         return 0;
 313 }
 314
 315 static void flexcop_module_cleanup(void)
 316 {
 317         info(DRIVER_NAME " unloaded successfully");
 318 }
 319
 320 module_init(flexcop_module_init);
 321 module_exit(flexcop_module_cleanup);
 322
 323 MODULE_AUTHOR(DRIVER_AUTHOR);
 324 MODULE_DESCRIPTION(DRIVER_NAME);
 325 MODULE_LICENSE("GPL");