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");
312