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0001 // SPDX-License-Identifier: LGPL-2.1-or-later
0002 /*
0003  * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
0004  * flexcop.c - main module part
0005  * Copyright (C) 2004-9 Patrick Boettcher <patrick.boettcher@posteo.de>
0006  * based on skystar2-driver Copyright (C) 2003 Vadim Catana, skystar@moldova.cc
0007  *
0008  * Acknowledgements:
0009  *   John Jurrius from BBTI, Inc. for extensive support
0010  *                    with code examples and data books
0011  *   Bjarne Steinsbo, bjarne at steinsbo.com (some ideas for rewriting)
0012  *
0013  * Contributions to the skystar2-driver have been done by
0014  *   Vincenzo Di Massa, hawk.it at tiscalinet.it (several DiSEqC fixes)
0015  *   Roberto Ragusa, r.ragusa at libero.it (polishing, restyling the code)
0016  *   Uwe Bugla, uwe.bugla at gmx.de (doing tests, restyling code, writing docu)
0017  *   Niklas Peinecke, peinecke at gdv.uni-hannover.de (hardware pid/mac
0018  *               filtering)
0019  */
0020 
0021 #include "flexcop.h"
0022 
0023 #define DRIVER_NAME "B2C2 FlexcopII/II(b)/III digital TV receiver chip"
0024 #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@posteo.de"
0025 
0026 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
0027 #define DEBSTATUS ""
0028 #else
0029 #define DEBSTATUS " (debugging is not enabled)"
0030 #endif
0031 
0032 int b2c2_flexcop_debug;
0033 EXPORT_SYMBOL_GPL(b2c2_flexcop_debug);
0034 module_param_named(debug, b2c2_flexcop_debug,  int, 0644);
0035 MODULE_PARM_DESC(debug,
0036         "set debug level (1=info,2=tuner,4=i2c,8=ts,16=sram,32=reg,64=i2cdump (|-able))."
0037         DEBSTATUS);
0038 #undef DEBSTATUS
0039 
0040 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
0041 
0042 /* global zero for ibi values */
0043 flexcop_ibi_value ibi_zero;
0044 
0045 static int flexcop_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
0046 {
0047     struct flexcop_device *fc = dvbdmxfeed->demux->priv;
0048     return flexcop_pid_feed_control(fc, dvbdmxfeed, 1);
0049 }
0050 
0051 static int flexcop_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
0052 {
0053     struct flexcop_device *fc = dvbdmxfeed->demux->priv;
0054     return flexcop_pid_feed_control(fc, dvbdmxfeed, 0);
0055 }
0056 
0057 static int flexcop_dvb_init(struct flexcop_device *fc)
0058 {
0059     int ret = dvb_register_adapter(&fc->dvb_adapter,
0060             "FlexCop Digital TV device", fc->owner,
0061             fc->dev, adapter_nr);
0062     if (ret < 0) {
0063         err("error registering DVB adapter");
0064         return ret;
0065     }
0066     fc->dvb_adapter.priv = fc;
0067 
0068     fc->demux.dmx.capabilities = (DMX_TS_FILTERING | DMX_SECTION_FILTERING
0069             | DMX_MEMORY_BASED_FILTERING);
0070     fc->demux.priv = fc;
0071     fc->demux.filternum = fc->demux.feednum = FC_MAX_FEED;
0072     fc->demux.start_feed = flexcop_dvb_start_feed;
0073     fc->demux.stop_feed = flexcop_dvb_stop_feed;
0074     fc->demux.write_to_decoder = NULL;
0075 
0076     ret = dvb_dmx_init(&fc->demux);
0077     if (ret < 0) {
0078         err("dvb_dmx failed: error %d", ret);
0079         goto err_dmx;
0080     }
0081 
0082     fc->hw_frontend.source = DMX_FRONTEND_0;
0083 
0084     fc->dmxdev.filternum = fc->demux.feednum;
0085     fc->dmxdev.demux = &fc->demux.dmx;
0086     fc->dmxdev.capabilities = 0;
0087     ret = dvb_dmxdev_init(&fc->dmxdev, &fc->dvb_adapter);
0088     if (ret < 0) {
0089         err("dvb_dmxdev_init failed: error %d", ret);
0090         goto err_dmx_dev;
0091     }
0092 
0093     ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->hw_frontend);
0094     if (ret < 0) {
0095         err("adding hw_frontend to dmx failed: error %d", ret);
0096         goto err_dmx_add_hw_frontend;
0097     }
0098 
0099     fc->mem_frontend.source = DMX_MEMORY_FE;
0100     ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->mem_frontend);
0101     if (ret < 0) {
0102         err("adding mem_frontend to dmx failed: error %d", ret);
0103         goto err_dmx_add_mem_frontend;
0104     }
0105 
0106     ret = fc->demux.dmx.connect_frontend(&fc->demux.dmx, &fc->hw_frontend);
0107     if (ret < 0) {
0108         err("connect frontend failed: error %d", ret);
0109         goto err_connect_frontend;
0110     }
0111 
0112     ret = dvb_net_init(&fc->dvb_adapter, &fc->dvbnet, &fc->demux.dmx);
0113     if (ret < 0) {
0114         err("dvb_net_init failed: error %d", ret);
0115         goto err_net;
0116     }
0117 
0118     fc->init_state |= FC_STATE_DVB_INIT;
0119     return 0;
0120 
0121 err_net:
0122     fc->demux.dmx.disconnect_frontend(&fc->demux.dmx);
0123 err_connect_frontend:
0124     fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->mem_frontend);
0125 err_dmx_add_mem_frontend:
0126     fc->demux.dmx.remove_frontend(&fc->demux.dmx, &fc->hw_frontend);
0127 err_dmx_add_hw_frontend:
0128     dvb_dmxdev_release(&fc->dmxdev);
0129 err_dmx_dev:
0130     dvb_dmx_release(&fc->demux);
0131 err_dmx:
0132     dvb_unregister_adapter(&fc->dvb_adapter);
0133     return ret;
0134 }
0135 
0136 static void flexcop_dvb_exit(struct flexcop_device *fc)
0137 {
0138     if (fc->init_state & FC_STATE_DVB_INIT) {
0139         dvb_net_release(&fc->dvbnet);
0140 
0141         fc->demux.dmx.close(&fc->demux.dmx);
0142         fc->demux.dmx.remove_frontend(&fc->demux.dmx,
0143             &fc->mem_frontend);
0144         fc->demux.dmx.remove_frontend(&fc->demux.dmx,
0145             &fc->hw_frontend);
0146         dvb_dmxdev_release(&fc->dmxdev);
0147         dvb_dmx_release(&fc->demux);
0148         dvb_unregister_adapter(&fc->dvb_adapter);
0149         deb_info("deinitialized dvb stuff\n");
0150     }
0151     fc->init_state &= ~FC_STATE_DVB_INIT;
0152 }
0153 
0154 /* these methods are necessary to achieve the long-term-goal of hiding the
0155  * struct flexcop_device from the bus-parts */
0156 void flexcop_pass_dmx_data(struct flexcop_device *fc, u8 *buf, u32 len)
0157 {
0158     dvb_dmx_swfilter(&fc->demux, buf, len);
0159 }
0160 EXPORT_SYMBOL(flexcop_pass_dmx_data);
0161 
0162 void flexcop_pass_dmx_packets(struct flexcop_device *fc, u8 *buf, u32 no)
0163 {
0164     dvb_dmx_swfilter_packets(&fc->demux, buf, no);
0165 }
0166 EXPORT_SYMBOL(flexcop_pass_dmx_packets);
0167 
0168 static void flexcop_reset(struct flexcop_device *fc)
0169 {
0170     flexcop_ibi_value v210, v204;
0171 
0172     /* reset the flexcop itself */
0173     fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
0174 
0175     v210.raw = 0;
0176     v210.sw_reset_210.reset_block_000 = 1;
0177     v210.sw_reset_210.reset_block_100 = 1;
0178     v210.sw_reset_210.reset_block_200 = 1;
0179     v210.sw_reset_210.reset_block_300 = 1;
0180     v210.sw_reset_210.reset_block_400 = 1;
0181     v210.sw_reset_210.reset_block_500 = 1;
0182     v210.sw_reset_210.reset_block_600 = 1;
0183     v210.sw_reset_210.reset_block_700 = 1;
0184     v210.sw_reset_210.Block_reset_enable = 0xb2;
0185     v210.sw_reset_210.Special_controls = 0xc259;
0186     fc->write_ibi_reg(fc,sw_reset_210,v210);
0187     msleep(1);
0188 
0189     /* reset the periphical devices */
0190 
0191     v204 = fc->read_ibi_reg(fc,misc_204);
0192     v204.misc_204.Per_reset_sig = 0;
0193     fc->write_ibi_reg(fc,misc_204,v204);
0194     msleep(1);
0195     v204.misc_204.Per_reset_sig = 1;
0196     fc->write_ibi_reg(fc,misc_204,v204);
0197 }
0198 
0199 void flexcop_reset_block_300(struct flexcop_device *fc)
0200 {
0201     flexcop_ibi_value v208_save = fc->read_ibi_reg(fc, ctrl_208),
0202               v210 = fc->read_ibi_reg(fc, sw_reset_210);
0203 
0204     deb_rdump("208: %08x, 210: %08x\n", v208_save.raw, v210.raw);
0205     fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
0206 
0207     v210.sw_reset_210.reset_block_300 = 1;
0208     v210.sw_reset_210.Block_reset_enable = 0xb2;
0209 
0210     fc->write_ibi_reg(fc,sw_reset_210,v210);
0211     fc->write_ibi_reg(fc,ctrl_208,v208_save);
0212 }
0213 
0214 struct flexcop_device *flexcop_device_kmalloc(size_t bus_specific_len)
0215 {
0216     void *bus;
0217     struct flexcop_device *fc = kzalloc(sizeof(struct flexcop_device),
0218                 GFP_KERNEL);
0219     if (!fc) {
0220         err("no memory");
0221         return NULL;
0222     }
0223 
0224     bus = kzalloc(bus_specific_len, GFP_KERNEL);
0225     if (!bus) {
0226         err("no memory");
0227         kfree(fc);
0228         return NULL;
0229     }
0230 
0231     fc->bus_specific = bus;
0232 
0233     return fc;
0234 }
0235 EXPORT_SYMBOL(flexcop_device_kmalloc);
0236 
0237 void flexcop_device_kfree(struct flexcop_device *fc)
0238 {
0239     kfree(fc->bus_specific);
0240     kfree(fc);
0241 }
0242 EXPORT_SYMBOL(flexcop_device_kfree);
0243 
0244 int flexcop_device_initialize(struct flexcop_device *fc)
0245 {
0246     int ret;
0247     ibi_zero.raw = 0;
0248 
0249     flexcop_reset(fc);
0250     flexcop_determine_revision(fc);
0251     flexcop_sram_init(fc);
0252     flexcop_hw_filter_init(fc);
0253     flexcop_smc_ctrl(fc, 0);
0254 
0255     ret = flexcop_dvb_init(fc);
0256     if (ret)
0257         goto error;
0258 
0259     /* i2c has to be done before doing EEProm stuff -
0260      * because the EEProm is accessed via i2c */
0261     ret = flexcop_i2c_init(fc);
0262     if (ret)
0263         goto error;
0264 
0265     /* do the MAC address reading after initializing the dvb_adapter */
0266     if (fc->get_mac_addr(fc, 0) == 0) {
0267         u8 *b = fc->dvb_adapter.proposed_mac;
0268         info("MAC address = %pM", b);
0269         flexcop_set_mac_filter(fc,b);
0270         flexcop_mac_filter_ctrl(fc,1);
0271     } else
0272         warn("reading of MAC address failed.\n");
0273 
0274     ret = flexcop_frontend_init(fc);
0275     if (ret)
0276         goto error;
0277 
0278     flexcop_device_name(fc,"initialization of","complete");
0279     return 0;
0280 
0281 error:
0282     flexcop_device_exit(fc);
0283     return ret;
0284 }
0285 EXPORT_SYMBOL(flexcop_device_initialize);
0286 
0287 void flexcop_device_exit(struct flexcop_device *fc)
0288 {
0289     flexcop_frontend_exit(fc);
0290     flexcop_i2c_exit(fc);
0291     flexcop_dvb_exit(fc);
0292 }
0293 EXPORT_SYMBOL(flexcop_device_exit);
0294 
0295 static int flexcop_module_init(void)
0296 {
0297     info(DRIVER_NAME " loaded successfully");
0298     return 0;
0299 }
0300 
0301 static void flexcop_module_cleanup(void)
0302 {
0303     info(DRIVER_NAME " unloaded successfully");
0304 }
0305 
0306 module_init(flexcop_module_init);
0307 module_exit(flexcop_module_cleanup);
0308 
0309 MODULE_AUTHOR(DRIVER_AUTHOR);
0310 MODULE_DESCRIPTION(DRIVER_NAME);
0311 MODULE_LICENSE("GPL");
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