drivers/media/common/b2c2/flexcop.c

   1 // SPDX-License-Identifier: LGPL-2.1-or-later
   2 /*
   3  * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
   4  * flexcop.c - main module part
   5  * Copyright (C) 2004-9 Patrick Boettcher <patrick.boettcher@posteo.de>
   6  * based on skystar2-driver Copyright (C) 2003 Vadim Catana, skystar@moldova.cc
   7  *
   8  * Acknowledgements:
   9  *   John Jurrius from BBTI, Inc. for extensive support
  10  *                    with code examples and data books
  11  *   Bjarne Steinsbo, bjarne at steinsbo.com (some ideas for rewriting)
  12  *
  13  * Contributions to the skystar2-driver have been done by
  14  *   Vincenzo Di Massa, hawk.it at tiscalinet.it (several DiSEqC fixes)
  15  *   Roberto Ragusa, r.ragusa at libero.it (polishing, restyling the code)
  16  *   Uwe Bugla, uwe.bugla at gmx.de (doing tests, restyling code, writing docu)
  17  *   Niklas Peinecke, peinecke at gdv.uni-hannover.de (hardware pid/mac
  18  *               filtering)
  19  */
  20
  21 #include "flexcop.h"
  22
  23 #define DRIVER_NAME "B2C2 FlexcopII/II(b)/III digital TV receiver chip"
  24 #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@posteo.de"
  25
  26 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
  27 #define DEBSTATUS ""
  28 #else
  29 #define DEBSTATUS " (debugging is not enabled)"
  30 #endif
  31
  32 int b2c2_flexcop_debug;
  33 EXPORT_SYMBOL_GPL(b2c2_flexcop_debug);
  34 module_param_named(debug, b2c2_flexcop_debug,  int, 0644);
  35 MODULE_PARM_DESC(debug,
  36                 "set debug level (1=info,2=tuner,4=i2c,8=ts,16=sram,32=reg,64=i2cdump (|-able))."
  37                 DEBSTATUS);
  38 #undef DEBSTATUS
  39
  40 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  41
  42 /* global zero for ibi values */
  43 flexcop_ibi_value ibi_zero;
  44
  45 static int flexcop_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  46 {
  47         struct flexcop_device *fc = dvbdmxfeed->demux->priv;
  48         return flexcop_pid_feed_control(fc, dvbdmxfeed, 1);
  49 }
  50
  51 static int flexcop_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  52 {
  53         struct flexcop_device *fc = dvbdmxfeed->demux->priv;
  54         return flexcop_pid_feed_control(fc, dvbdmxfeed, 0);
  55 }
  56
  57 static int flexcop_dvb_init(struct flexcop_device *fc)
  58 {
  59         int ret = dvb_register_adapter(&fc->dvb_adapter,
  60                         "FlexCop Digital TV device", fc->owner,
  61                         fc->dev, adapter_nr);
  62         if (ret < 0) {
  63                 err("error registering DVB adapter");
  64                 return ret;
  65         }
  66         fc->dvb_adapter.priv = fc;
  67
  68         fc->demux.dmx.capabilities = (DMX_TS_FILTERING | DMX_SECTION_FILTERING
  69                         | DMX_MEMORY_BASED_FILTERING);
  70         fc->demux.priv = fc;
  71         fc->demux.filternum = fc->demux.feednum = FC_MAX_FEED;
  72         fc->demux.start_feed = flexcop_dvb_start_feed;
  73         fc->demux.stop_feed = flexcop_dvb_stop_feed;
  74         fc->demux.write_to_decoder = NULL;
  75
  76         ret = dvb_dmx_init(&fc->demux);
  77         if (ret < 0) {
  78                 err("dvb_dmx failed: error %d", ret);
  79                 goto err_dmx;
  80         }
  81
  82         fc->hw_frontend.source = DMX_FRONTEND_0;
  83
  84         fc->dmxdev.filternum = fc->demux.feednum;
  85         fc->dmxdev.demux = &fc->demux.dmx;
  86         fc->dmxdev.capabilities = 0;
  87         ret = dvb_dmxdev_init(&fc->dmxdev, &fc->dvb_adapter);
  88         if (ret < 0) {
  89                 err("dvb_dmxdev_init failed: error %d", ret);
  90                 goto err_dmx_dev;
  91         }
  92
  93         ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->hw_frontend);
  94         if (ret < 0) {
  95                 err("adding hw_frontend to dmx failed: error %d", ret);
  96                 goto err_dmx_add_hw_frontend;
  97         }
  98
  99         fc->mem_frontend.source = DMX_MEMORY_FE;
 100         ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->mem_frontend);
 101         if (ret < 0) {
 102                 err("adding mem_frontend to dmx failed: error %d", ret);
 103                 goto err_dmx_add_mem_frontend;
 104         }
 105
 106         ret = fc->demux.dmx.connect_frontend(&fc->demux.dmx, &fc->hw_frontend);
 107         if (ret < 0) {
 108                 err("connect frontend failed: error %d", ret);
 109                 goto err_connect_frontend;
 110         }
 111
 112         ret = dvb_net_init(&fc->dvb_adapter, &fc->dvbnet, &fc->demux.dmx);
 113         if (ret < 0) {
 114                 err("dvb_net_init failed: error %d", ret);
 115                 goto err_net;
 116         }
 117
 118         fc->init_state |= FC_STATE_DVB_INIT;
 119         return 0;
 120
 121 err_net:
 122         fc->demux.dmx.disconnect_frontend(&fc->demux.dmx);
 123 err_connect_frontend:
 124         fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->mem_frontend);
 125 err_dmx_add_mem_frontend:
 126         fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->hw_frontend);
 127 err_dmx_add_hw_frontend:
 128         dvb_dmxdev_release(&fc->dmxdev);
 129 err_dmx_dev:
 130         dvb_dmx_release(&fc->demux);
 131 err_dmx:
 132         dvb_unregister_adapter(&fc->dvb_adapter);
 133         return ret;
 134 }
 135
 136 static void flexcop_dvb_exit(struct flexcop_device *fc)
 137 {
 138         if (fc->init_state & FC_STATE_DVB_INIT) {
 139                 dvb_net_release(&fc->dvbnet);
 140
 141                 fc->demux.dmx.close(&fc->demux.dmx);
 142                 fc->demux.dmx.remove_frontend(&fc->demux.dmx,
 143                         &fc->mem_frontend);
 144                 fc->demux.dmx.remove_frontend(&fc->demux.dmx,
 145                         &fc->hw_frontend);
 146                 dvb_dmxdev_release(&fc->dmxdev);
 147                 dvb_dmx_release(&fc->demux);
 148                 dvb_unregister_adapter(&fc->dvb_adapter);
 149                 deb_info("deinitialized dvb stuff\n");
 150         }
 151         fc->init_state &= ~FC_STATE_DVB_INIT;
 152 }
 153
 154 /* these methods are necessary to achieve the long-term-goal of hiding the
 155  * struct flexcop_device from the bus-parts */
 156 void flexcop_pass_dmx_data(struct flexcop_device *fc, u8 *buf, u32 len)
 157 {
 158         dvb_dmx_swfilter(&fc->demux, buf, len);
 159 }
 160 EXPORT_SYMBOL(flexcop_pass_dmx_data);
 161
 162 void flexcop_pass_dmx_packets(struct flexcop_device *fc, u8 *buf, u32 no)
 163 {
 164         dvb_dmx_swfilter_packets(&fc->demux, buf, no);
 165 }
 166 EXPORT_SYMBOL(flexcop_pass_dmx_packets);
 167
 168 static void flexcop_reset(struct flexcop_device *fc)
 169 {
 170         flexcop_ibi_value v210, v204;
 171
 172         /* reset the flexcop itself */
 173         fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
 174
 175         v210.raw = 0;
 176         v210.sw_reset_210.reset_block_000 = 1;
 177         v210.sw_reset_210.reset_block_100 = 1;
 178         v210.sw_reset_210.reset_block_200 = 1;
 179         v210.sw_reset_210.reset_block_300 = 1;
 180         v210.sw_reset_210.reset_block_400 = 1;
 181         v210.sw_reset_210.reset_block_500 = 1;
 182         v210.sw_reset_210.reset_block_600 = 1;
 183         v210.sw_reset_210.reset_block_700 = 1;
 184         v210.sw_reset_210.Block_reset_enable = 0xb2;
 185         v210.sw_reset_210.Special_controls = 0xc259;
 186         fc->write_ibi_reg(fc,sw_reset_210,v210);
 187         msleep(1);
 188
 189         /* reset the periphical devices */
 190
 191         v204 = fc->read_ibi_reg(fc,misc_204);
 192         v204.misc_204.Per_reset_sig = 0;
 193         fc->write_ibi_reg(fc,misc_204,v204);
 194         msleep(1);
 195         v204.misc_204.Per_reset_sig = 1;
 196         fc->write_ibi_reg(fc,misc_204,v204);
 197 }
 198
 199 void flexcop_reset_block_300(struct flexcop_device *fc)
 200 {
 201         flexcop_ibi_value v208_save = fc->read_ibi_reg(fc, ctrl_208),
 202                           v210 = fc->read_ibi_reg(fc, sw_reset_210);
 203
 204         deb_rdump("208: %08x, 210: %08x\n", v208_save.raw, v210.raw);
 205         fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
 206
 207         v210.sw_reset_210.reset_block_300 = 1;
 208         v210.sw_reset_210.Block_reset_enable = 0xb2;
 209
 210         fc->write_ibi_reg(fc,sw_reset_210,v210);
 211         fc->write_ibi_reg(fc,ctrl_208,v208_save);
 212 }
 213
 214 struct flexcop_device *flexcop_device_kmalloc(size_t bus_specific_len)
 215 {
 216         void *bus;
 217         struct flexcop_device *fc = kzalloc(sizeof(struct flexcop_device),
 218                                 GFP_KERNEL);
 219         if (!fc) {
 220                 err("no memory");
 221                 return NULL;
 222         }
 223
 224         bus = kzalloc(bus_specific_len, GFP_KERNEL);
 225         if (!bus) {
 226                 err("no memory");
 227                 kfree(fc);
 228                 return NULL;
 229         }
 230
 231         fc->bus_specific = bus;
 232
 233         return fc;
 234 }
 235 EXPORT_SYMBOL(flexcop_device_kmalloc);
 236
 237 void flexcop_device_kfree(struct flexcop_device *fc)
 238 {
 239         kfree(fc->bus_specific);
 240         kfree(fc);
 241 }
 242 EXPORT_SYMBOL(flexcop_device_kfree);
 243
 244 int flexcop_device_initialize(struct flexcop_device *fc)
 245 {
 246         int ret;
 247         ibi_zero.raw = 0;
 248
 249         flexcop_reset(fc);
 250         flexcop_determine_revision(fc);
 251         flexcop_sram_init(fc);
 252         flexcop_hw_filter_init(fc);
 253         flexcop_smc_ctrl(fc, 0);
 254
 255         ret = flexcop_dvb_init(fc);
 256         if (ret)
 257                 goto error;
 258
 259         /* i2c has to be done before doing EEProm stuff -
 260          * because the EEProm is accessed via i2c */
 261         ret = flexcop_i2c_init(fc);
 262         if (ret)
 263                 goto error;
 264
 265         /* do the MAC address reading after initializing the dvb_adapter */
 266         if (fc->get_mac_addr(fc, 0) == 0) {
 267                 u8 *b = fc->dvb_adapter.proposed_mac;
 268                 info("MAC address = %pM", b);
 269                 flexcop_set_mac_filter(fc,b);
 270                 flexcop_mac_filter_ctrl(fc,1);
 271         } else
 272                 warn("reading of MAC address failed.\n");
 273
 274         ret = flexcop_frontend_init(fc);
 275         if (ret)
 276                 goto error;
 277
 278         flexcop_device_name(fc,"initialization of","complete");
 279         return 0;
 280
 281 error:
 282         flexcop_device_exit(fc);
 283         return ret;
 284 }
 285 EXPORT_SYMBOL(flexcop_device_initialize);
 286
 287 void flexcop_device_exit(struct flexcop_device *fc)
 288 {
 289         flexcop_frontend_exit(fc);
 290         flexcop_i2c_exit(fc);
 291         flexcop_dvb_exit(fc);
 292 }
 293 EXPORT_SYMBOL(flexcop_device_exit);
 294
 295 static int flexcop_module_init(void)
 296 {
 297         info(DRIVER_NAME " loaded successfully");
 298         return 0;
 299 }
 300
 301 static void flexcop_module_cleanup(void)
 302 {
 303         info(DRIVER_NAME " unloaded successfully");
 304 }
 305
 306 module_init(flexcop_module_init);
 307 module_exit(flexcop_module_cleanup);
 308
 309 MODULE_AUTHOR(DRIVER_AUTHOR);
 310 MODULE_DESCRIPTION(DRIVER_NAME);
 311 MODULE_LICENSE("GPL");