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@posteo.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
  30 #include "flexcop.h"
  31
  32 #define DRIVER_NAME "B2C2 FlexcopII/II(b)/III digital TV receiver chip"
  33 #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@posteo.de"
  34
  35 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
  36 #define DEBSTATUS ""
  37 #else
  38 #define DEBSTATUS " (debugging is not enabled)"
  39 #endif
  40
  41 int b2c2_flexcop_debug;
  42 EXPORT_SYMBOL_GPL(b2c2_flexcop_debug);
  43 module_param_named(debug, b2c2_flexcop_debug,  int, 0644);
  44 MODULE_PARM_DESC(debug,
  45                 "set debug level (1=info,2=tuner,4=i2c,8=ts,16=sram,32=reg,64=i2cdump (|-able))."
  46                 DEBSTATUS);
  47 #undef DEBSTATUS
  48
  49 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  50
  51 /* global zero for ibi values */
  52 flexcop_ibi_value ibi_zero;
  53
  54 static int flexcop_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  55 {
  56         struct flexcop_device *fc = dvbdmxfeed->demux->priv;
  57         return flexcop_pid_feed_control(fc, dvbdmxfeed, 1);
  58 }
  59
  60 static int flexcop_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  61 {
  62         struct flexcop_device *fc = dvbdmxfeed->demux->priv;
  63         return flexcop_pid_feed_control(fc, dvbdmxfeed, 0);
  64 }
  65
  66 static int flexcop_dvb_init(struct flexcop_device *fc)
  67 {
  68         int ret = dvb_register_adapter(&fc->dvb_adapter,
  69                         "FlexCop Digital TV device", fc->owner,
  70                         fc->dev, adapter_nr);
  71         if (ret < 0) {
  72                 err("error registering DVB adapter");
  73                 return ret;
  74         }
  75         fc->dvb_adapter.priv = fc;
  76
  77         fc->demux.dmx.capabilities = (DMX_TS_FILTERING | DMX_SECTION_FILTERING
  78                         | DMX_MEMORY_BASED_FILTERING);
  79         fc->demux.priv = fc;
  80         fc->demux.filternum = fc->demux.feednum = FC_MAX_FEED;
  81         fc->demux.start_feed = flexcop_dvb_start_feed;
  82         fc->demux.stop_feed = flexcop_dvb_stop_feed;
  83         fc->demux.write_to_decoder = NULL;
  84
  85         ret = dvb_dmx_init(&fc->demux);
  86         if (ret < 0) {
  87                 err("dvb_dmx failed: error %d", ret);
  88                 goto err_dmx;
  89         }
  90
  91         fc->hw_frontend.source = DMX_FRONTEND_0;
  92
  93         fc->dmxdev.filternum = fc->demux.feednum;
  94         fc->dmxdev.demux = &fc->demux.dmx;
  95         fc->dmxdev.capabilities = 0;
  96         ret = dvb_dmxdev_init(&fc->dmxdev, &fc->dvb_adapter);
  97         if (ret < 0) {
  98                 err("dvb_dmxdev_init failed: error %d", ret);
  99                 goto err_dmx_dev;
 100         }
 101
 102         ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->hw_frontend);
 103         if (ret < 0) {
 104                 err("adding hw_frontend to dmx failed: error %d", ret);
 105                 goto err_dmx_add_hw_frontend;
 106         }
 107
 108         fc->mem_frontend.source = DMX_MEMORY_FE;
 109         ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->mem_frontend);
 110         if (ret < 0) {
 111                 err("adding mem_frontend to dmx failed: error %d", ret);
 112                 goto err_dmx_add_mem_frontend;
 113         }
 114
 115         ret = fc->demux.dmx.connect_frontend(&fc->demux.dmx, &fc->hw_frontend);
 116         if (ret < 0) {
 117                 err("connect frontend failed: error %d", ret);
 118                 goto err_connect_frontend;
 119         }
 120
 121         ret = dvb_net_init(&fc->dvb_adapter, &fc->dvbnet, &fc->demux.dmx);
 122         if (ret < 0) {
 123                 err("dvb_net_init failed: error %d", ret);
 124                 goto err_net;
 125         }
 126
 127         fc->init_state |= FC_STATE_DVB_INIT;
 128         return 0;
 129
 130 err_net:
 131         fc->demux.dmx.disconnect_frontend(&fc->demux.dmx);
 132 err_connect_frontend:
 133         fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->mem_frontend);
 134 err_dmx_add_mem_frontend:
 135         fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->hw_frontend);
 136 err_dmx_add_hw_frontend:
 137         dvb_dmxdev_release(&fc->dmxdev);
 138 err_dmx_dev:
 139         dvb_dmx_release(&fc->demux);
 140 err_dmx:
 141         dvb_unregister_adapter(&fc->dvb_adapter);
 142         return ret;
 143 }
 144
 145 static void flexcop_dvb_exit(struct flexcop_device *fc)
 146 {
 147         if (fc->init_state & FC_STATE_DVB_INIT) {
 148                 dvb_net_release(&fc->dvbnet);
 149
 150                 fc->demux.dmx.close(&fc->demux.dmx);
 151                 fc->demux.dmx.remove_frontend(&fc->demux.dmx,
 152                         &fc->mem_frontend);
 153                 fc->demux.dmx.remove_frontend(&fc->demux.dmx,
 154                         &fc->hw_frontend);
 155                 dvb_dmxdev_release(&fc->dmxdev);
 156                 dvb_dmx_release(&fc->demux);
 157                 dvb_unregister_adapter(&fc->dvb_adapter);
 158                 deb_info("deinitialized dvb stuff\n");
 159         }
 160         fc->init_state &= ~FC_STATE_DVB_INIT;
 161 }
 162
 163 /* these methods are necessary to achieve the long-term-goal of hiding the
 164  * struct flexcop_device from the bus-parts */
 165 void flexcop_pass_dmx_data(struct flexcop_device *fc, u8 *buf, u32 len)
 166 {
 167         dvb_dmx_swfilter(&fc->demux, buf, len);
 168 }
 169 EXPORT_SYMBOL(flexcop_pass_dmx_data);
 170
 171 void flexcop_pass_dmx_packets(struct flexcop_device *fc, u8 *buf, u32 no)
 172 {
 173         dvb_dmx_swfilter_packets(&fc->demux, buf, no);
 174 }
 175 EXPORT_SYMBOL(flexcop_pass_dmx_packets);
 176
 177 static void flexcop_reset(struct flexcop_device *fc)
 178 {
 179         flexcop_ibi_value v210, v204;
 180
 181         /* reset the flexcop itself */
 182         fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
 183
 184         v210.raw = 0;
 185         v210.sw_reset_210.reset_block_000 = 1;
 186         v210.sw_reset_210.reset_block_100 = 1;
 187         v210.sw_reset_210.reset_block_200 = 1;
 188         v210.sw_reset_210.reset_block_300 = 1;
 189         v210.sw_reset_210.reset_block_400 = 1;
 190         v210.sw_reset_210.reset_block_500 = 1;
 191         v210.sw_reset_210.reset_block_600 = 1;
 192         v210.sw_reset_210.reset_block_700 = 1;
 193         v210.sw_reset_210.Block_reset_enable = 0xb2;
 194         v210.sw_reset_210.Special_controls = 0xc259;
 195         fc->write_ibi_reg(fc,sw_reset_210,v210);
 196         msleep(1);
 197
 198         /* reset the periphical devices */
 199
 200         v204 = fc->read_ibi_reg(fc,misc_204);
 201         v204.misc_204.Per_reset_sig = 0;
 202         fc->write_ibi_reg(fc,misc_204,v204);
 203         msleep(1);
 204         v204.misc_204.Per_reset_sig = 1;
 205         fc->write_ibi_reg(fc,misc_204,v204);
 206 }
 207
 208 void flexcop_reset_block_300(struct flexcop_device *fc)
 209 {
 210         flexcop_ibi_value v208_save = fc->read_ibi_reg(fc, ctrl_208),
 211                           v210 = fc->read_ibi_reg(fc, sw_reset_210);
 212
 213         deb_rdump("208: %08x, 210: %08x\n", v208_save.raw, v210.raw);
 214         fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
 215
 216         v210.sw_reset_210.reset_block_300 = 1;
 217         v210.sw_reset_210.Block_reset_enable = 0xb2;
 218
 219         fc->write_ibi_reg(fc,sw_reset_210,v210);
 220         fc->write_ibi_reg(fc,ctrl_208,v208_save);
 221 }
 222
 223 struct flexcop_device *flexcop_device_kmalloc(size_t bus_specific_len)
 224 {
 225         void *bus;
 226         struct flexcop_device *fc = kzalloc(sizeof(struct flexcop_device),
 227                                 GFP_KERNEL);
 228         if (!fc) {
 229                 err("no memory");
 230                 return NULL;
 231         }
 232
 233         bus = kzalloc(bus_specific_len, GFP_KERNEL);
 234         if (!bus) {
 235                 err("no memory");
 236                 kfree(fc);
 237                 return NULL;
 238         }
 239
 240         fc->bus_specific = bus;
 241
 242         return fc;
 243 }
 244 EXPORT_SYMBOL(flexcop_device_kmalloc);
 245
 246 void flexcop_device_kfree(struct flexcop_device *fc)
 247 {
 248         kfree(fc->bus_specific);
 249         kfree(fc);
 250 }
 251 EXPORT_SYMBOL(flexcop_device_kfree);
 252
 253 int flexcop_device_initialize(struct flexcop_device *fc)
 254 {
 255         int ret;
 256         ibi_zero.raw = 0;
 257
 258         flexcop_reset(fc);
 259         flexcop_determine_revision(fc);
 260         flexcop_sram_init(fc);
 261         flexcop_hw_filter_init(fc);
 262         flexcop_smc_ctrl(fc, 0);
 263
 264         ret = flexcop_dvb_init(fc);
 265         if (ret)
 266                 goto error;
 267
 268         /* i2c has to be done before doing EEProm stuff -
 269          * because the EEProm is accessed via i2c */
 270         ret = flexcop_i2c_init(fc);
 271         if (ret)
 272                 goto error;
 273
 274         /* do the MAC address reading after initializing the dvb_adapter */
 275         if (fc->get_mac_addr(fc, 0) == 0) {
 276                 u8 *b = fc->dvb_adapter.proposed_mac;
 277                 info("MAC address = %pM", b);
 278                 flexcop_set_mac_filter(fc,b);
 279                 flexcop_mac_filter_ctrl(fc,1);
 280         } else
 281                 warn("reading of MAC address failed.\n");
 282
 283         ret = flexcop_frontend_init(fc);
 284         if (ret)
 285                 goto error;
 286
 287         flexcop_device_name(fc,"initialization of","complete");
 288         return 0;
 289
 290 error:
 291         flexcop_device_exit(fc);
 292         return ret;
 293 }
 294 EXPORT_SYMBOL(flexcop_device_initialize);
 295
 296 void flexcop_device_exit(struct flexcop_device *fc)
 297 {
 298         flexcop_frontend_exit(fc);
 299         flexcop_i2c_exit(fc);
 300         flexcop_dvb_exit(fc);
 301 }
 302 EXPORT_SYMBOL(flexcop_device_exit);
 303
 304 static int flexcop_module_init(void)
 305 {
 306         info(DRIVER_NAME " loaded successfully");
 307         return 0;
 308 }
 309
 310 static void flexcop_module_cleanup(void)
 311 {
 312         info(DRIVER_NAME " unloaded successfully");
 313 }
 314
 315 module_init(flexcop_module_init);
 316 module_exit(flexcop_module_cleanup);
 317
 318 MODULE_AUTHOR(DRIVER_AUTHOR);
 319 MODULE_DESCRIPTION(DRIVER_NAME);
 320 MODULE_LICENSE("GPL");