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Commit | Line | Data |
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2add87a9 JS |
1 | /* |
2 | * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III | |
3 | * | |
4 | * flexcop-pci.c - covers the PCI part including DMA transfers. | |
5 | * | |
6 | * see flexcop.c for copyright information. | |
7 | */ | |
8 | ||
9 | #define FC_LOG_PREFIX "flexcop-pci" | |
10 | #include "flexcop-common.h" | |
11 | ||
c4ee3fd4 | 12 | static int enable_pid_filtering = 1; |
2add87a9 JS |
13 | module_param(enable_pid_filtering, int, 0444); |
14 | MODULE_PARM_DESC(enable_pid_filtering, "enable hardware pid filtering: supported values: 0 (fullts), 1"); | |
15 | ||
64221be7 PB |
16 | static int irq_chk_intv; |
17 | module_param(irq_chk_intv, int, 0644); | |
18 | MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ watchdog (currently just debugging)."); | |
19 | ||
2add87a9 JS |
20 | #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG |
21 | #define dprintk(level,args...) \ | |
22 | do { if ((debug & level)) printk(args); } while (0) | |
23 | #define DEBSTATUS "" | |
24 | #else | |
25 | #define dprintk(level,args...) | |
26 | #define DEBSTATUS " (debugging is not enabled)" | |
27 | #endif | |
28 | ||
29 | #define deb_info(args...) dprintk(0x01,args) | |
30 | #define deb_reg(args...) dprintk(0x02,args) | |
31 | #define deb_ts(args...) dprintk(0x04,args) | |
32 | #define deb_irq(args...) dprintk(0x08,args) | |
64221be7 | 33 | #define deb_chk(args...) dprintk(0x10,args) |
2add87a9 JS |
34 | |
35 | static int debug = 0; | |
36 | module_param(debug, int, 0644); | |
37 | MODULE_PARM_DESC(debug, "set debug level (1=info,2=regs,4=TS,8=irqdma (|-able))." DEBSTATUS); | |
38 | ||
39 | #define DRIVER_VERSION "0.1" | |
40 | #define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV PCI Driver" | |
41 | #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>" | |
42 | ||
43 | struct flexcop_pci { | |
44 | struct pci_dev *pdev; | |
45 | ||
46 | #define FC_PCI_INIT 0x01 | |
47 | #define FC_PCI_DMA_INIT 0x02 | |
48 | int init_state; | |
49 | ||
50 | void __iomem *io_mem; | |
51 | u32 irq; | |
52 | /* buffersize (at least for DMA1, need to be % 188 == 0, | |
c4ee3fd4 | 53 | * this logic is required */ |
2add87a9 JS |
54 | #define FC_DEFAULT_DMA1_BUFSIZE (1280 * 188) |
55 | #define FC_DEFAULT_DMA2_BUFSIZE (10 * 188) | |
56 | struct flexcop_dma dma[2]; | |
57 | ||
58 | int active_dma1_addr; /* 0 = addr0 of dma1; 1 = addr1 of dma1 */ | |
59 | u32 last_dma1_cur_pos; /* position of the pointer last time the timer/packet irq occured */ | |
c4ee3fd4 | 60 | int count; |
2add87a9 | 61 | |
4853f16a JS |
62 | spinlock_t irq_lock; |
63 | ||
64221be7 PB |
64 | unsigned long last_irq; |
65 | ||
66 | struct work_struct irq_check_work; | |
67 | ||
2add87a9 JS |
68 | struct flexcop_device *fc_dev; |
69 | }; | |
70 | ||
71 | static int lastwreg,lastwval,lastrreg,lastrval; | |
72 | ||
73 | static flexcop_ibi_value flexcop_pci_read_ibi_reg (struct flexcop_device *fc, flexcop_ibi_register r) | |
74 | { | |
75 | struct flexcop_pci *fc_pci = fc->bus_specific; | |
76 | flexcop_ibi_value v; | |
77 | v.raw = readl(fc_pci->io_mem + r); | |
78 | ||
79 | if (lastrreg != r || lastrval != v.raw) { | |
80 | lastrreg = r; lastrval = v.raw; | |
81 | deb_reg("new rd: %3x: %08x\n",r,v.raw); | |
82 | } | |
83 | ||
84 | return v; | |
85 | } | |
86 | ||
87 | static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register r, flexcop_ibi_value v) | |
88 | { | |
89 | struct flexcop_pci *fc_pci = fc->bus_specific; | |
90 | ||
91 | if (lastwreg != r || lastwval != v.raw) { | |
92 | lastwreg = r; lastwval = v.raw; | |
93 | deb_reg("new wr: %3x: %08x\n",r,v.raw); | |
94 | } | |
95 | ||
96 | writel(v.raw, fc_pci->io_mem + r); | |
97 | return 0; | |
98 | } | |
99 | ||
64221be7 PB |
100 | static void flexcop_pci_irq_check_work(void *data) |
101 | { | |
102 | struct flexcop_pci *fc_pci = data; | |
103 | struct flexcop_device *fc = fc_pci->fc_dev; | |
104 | ||
105 | flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714); | |
106 | ||
107 | flexcop_dump_reg(fc_pci->fc_dev,dma1_000,4); | |
108 | ||
109 | if (v.sram_dest_reg_714.net_ovflow_error) | |
110 | deb_chk("sram net_ovflow_error\n"); | |
111 | if (v.sram_dest_reg_714.media_ovflow_error) | |
112 | deb_chk("sram media_ovflow_error\n"); | |
113 | if (v.sram_dest_reg_714.cai_ovflow_error) | |
114 | deb_chk("sram cai_ovflow_error\n"); | |
115 | if (v.sram_dest_reg_714.cai_ovflow_error) | |
116 | deb_chk("sram cai_ovflow_error\n"); | |
117 | ||
118 | schedule_delayed_work(&fc_pci->irq_check_work, | |
119 | msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv)); | |
120 | } | |
121 | ||
2add87a9 JS |
122 | /* When PID filtering is turned on, we use the timer IRQ, because small amounts |
123 | * of data need to be passed to the user space instantly as well. When PID | |
124 | * filtering is turned off, we use the page-change-IRQ */ | |
64221be7 | 125 | static irqreturn_t flexcop_pci_isr(int irq, void *dev_id, struct pt_regs *regs) |
2add87a9 JS |
126 | { |
127 | struct flexcop_pci *fc_pci = dev_id; | |
128 | struct flexcop_device *fc = fc_pci->fc_dev; | |
64221be7 | 129 | flexcop_ibi_value v; |
4853f16a JS |
130 | irqreturn_t ret = IRQ_HANDLED; |
131 | ||
132 | spin_lock_irq(&fc_pci->irq_lock); | |
2add87a9 | 133 | |
64221be7 PB |
134 | v = fc->read_ibi_reg(fc,irq_20c); |
135 | ||
136 | /* errors */ | |
137 | if (v.irq_20c.Data_receiver_error) | |
138 | deb_chk("data receiver error\n"); | |
139 | if (v.irq_20c.Continuity_error_flag) | |
140 | deb_chk("Contunuity error flag is set\n"); | |
141 | if (v.irq_20c.LLC_SNAP_FLAG_set) | |
142 | deb_chk("LLC_SNAP_FLAG_set is set\n"); | |
143 | if (v.irq_20c.Transport_Error) | |
144 | deb_chk("Transport error\n"); | |
145 | ||
146 | if ((fc_pci->count % 1000) == 0) | |
147 | deb_chk("%d valid irq took place so far\n",fc_pci->count); | |
148 | ||
2add87a9 JS |
149 | if (v.irq_20c.DMA1_IRQ_Status == 1) { |
150 | if (fc_pci->active_dma1_addr == 0) | |
151 | flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr0,fc_pci->dma[0].size / 188); | |
152 | else | |
153 | flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr1,fc_pci->dma[0].size / 188); | |
154 | ||
155 | deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr); | |
156 | fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr; | |
157 | } else if (v.irq_20c.DMA1_Timer_Status == 1) { | |
158 | /* for the timer IRQ we only can use buffer dmx feeding, because we don't have | |
159 | * complete TS packets when reading from the DMA memory */ | |
160 | dma_addr_t cur_addr = | |
161 | fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2; | |
162 | u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0; | |
163 | ||
64221be7 PB |
164 | deb_irq("%u irq: %08x cur_addr: %08x: cur_pos: %08x, last_cur_pos: %08x ", |
165 | jiffies_to_usecs(jiffies - fc_pci->last_irq),v.raw,cur_addr,cur_pos,fc_pci->last_dma1_cur_pos); | |
166 | fc_pci->last_irq = jiffies; | |
c4ee3fd4 | 167 | |
2add87a9 JS |
168 | /* buffer end was reached, restarted from the beginning |
169 | * pass the data from last_cur_pos to the buffer end to the demux | |
170 | */ | |
171 | if (cur_pos < fc_pci->last_dma1_cur_pos) { | |
c4ee3fd4 | 172 | deb_irq(" end was reached: passing %d bytes ",(fc_pci->dma[0].size*2 - 1) - fc_pci->last_dma1_cur_pos); |
2add87a9 JS |
173 | flexcop_pass_dmx_data(fc_pci->fc_dev, |
174 | fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos, | |
c4ee3fd4 | 175 | (fc_pci->dma[0].size*2) - fc_pci->last_dma1_cur_pos); |
2add87a9 JS |
176 | fc_pci->last_dma1_cur_pos = 0; |
177 | } | |
178 | ||
179 | if (cur_pos > fc_pci->last_dma1_cur_pos) { | |
c4ee3fd4 | 180 | deb_irq(" passing %d bytes ",cur_pos - fc_pci->last_dma1_cur_pos); |
2add87a9 JS |
181 | flexcop_pass_dmx_data(fc_pci->fc_dev, |
182 | fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos, | |
183 | cur_pos - fc_pci->last_dma1_cur_pos); | |
184 | } | |
c4ee3fd4 | 185 | deb_irq("\n"); |
2add87a9 JS |
186 | |
187 | fc_pci->last_dma1_cur_pos = cur_pos; | |
64221be7 PB |
188 | fc_pci->count++; |
189 | } else { | |
190 | deb_irq("isr for flexcop called, apparently without reason (%08x)\n",v.raw); | |
4853f16a | 191 | ret = IRQ_NONE; |
64221be7 | 192 | } |
4853f16a JS |
193 | |
194 | spin_unlock_irq(&fc_pci->irq_lock); | |
2add87a9 | 195 | |
4853f16a | 196 | return ret; |
2add87a9 JS |
197 | } |
198 | ||
199 | static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff) | |
200 | { | |
201 | struct flexcop_pci *fc_pci = fc->bus_specific; | |
202 | if (onoff) { | |
64221be7 PB |
203 | flexcop_dma_config(fc,&fc_pci->dma[0],FC_DMA_1); |
204 | flexcop_dma_config(fc,&fc_pci->dma[1],FC_DMA_2); | |
2add87a9 | 205 | |
64221be7 | 206 | flexcop_dma_config_timer(fc,FC_DMA_1,0); |
2add87a9 | 207 | |
64221be7 PB |
208 | flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1,1); |
209 | deb_irq("DMA xfer enabled\n"); | |
2add87a9 | 210 | |
64221be7 PB |
211 | fc_pci->last_dma1_cur_pos = 0; |
212 | flexcop_dma_control_timer_irq(fc,FC_DMA_1,1); | |
213 | deb_irq("IRQ enabled\n"); | |
214 | ||
215 | // fc_pci->active_dma1_addr = 0; | |
216 | // flexcop_dma_control_size_irq(fc,FC_DMA_1,1); | |
217 | ||
218 | if (irq_chk_intv > 0) | |
219 | schedule_delayed_work(&fc_pci->irq_check_work, | |
220 | msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv)); | |
2add87a9 | 221 | } else { |
64221be7 PB |
222 | if (irq_chk_intv > 0) |
223 | cancel_delayed_work(&fc_pci->irq_check_work); | |
224 | ||
225 | flexcop_dma_control_timer_irq(fc,FC_DMA_1,0); | |
226 | deb_irq("IRQ disabled\n"); | |
2add87a9 | 227 | |
64221be7 PB |
228 | // flexcop_dma_control_size_irq(fc,FC_DMA_1,0); |
229 | ||
230 | flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1,0); | |
231 | deb_irq("DMA xfer disabled\n"); | |
2add87a9 JS |
232 | } |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci) | |
238 | { | |
239 | int ret; | |
240 | if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[0],FC_DEFAULT_DMA1_BUFSIZE)) != 0) | |
241 | return ret; | |
242 | ||
243 | if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[1],FC_DEFAULT_DMA2_BUFSIZE)) != 0) | |
244 | goto dma1_free; | |
245 | ||
246 | flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_MEDIA | FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1); | |
247 | flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2); | |
248 | ||
249 | fc_pci->init_state |= FC_PCI_DMA_INIT; | |
64221be7 | 250 | |
2add87a9 JS |
251 | goto success; |
252 | dma1_free: | |
253 | flexcop_dma_free(&fc_pci->dma[0]); | |
254 | ||
255 | success: | |
256 | return ret; | |
257 | } | |
258 | ||
259 | static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci) | |
260 | { | |
261 | if (fc_pci->init_state & FC_PCI_DMA_INIT) { | |
262 | flexcop_dma_free(&fc_pci->dma[0]); | |
263 | flexcop_dma_free(&fc_pci->dma[1]); | |
264 | } | |
265 | fc_pci->init_state &= ~FC_PCI_DMA_INIT; | |
266 | } | |
267 | ||
268 | static int flexcop_pci_init(struct flexcop_pci *fc_pci) | |
269 | { | |
270 | int ret; | |
271 | u8 card_rev; | |
272 | ||
273 | pci_read_config_byte(fc_pci->pdev, PCI_CLASS_REVISION, &card_rev); | |
274 | info("card revision %x", card_rev); | |
275 | ||
276 | if ((ret = pci_enable_device(fc_pci->pdev)) != 0) | |
277 | return ret; | |
278 | ||
279 | pci_set_master(fc_pci->pdev); | |
280 | ||
281 | /* enable interrupts */ | |
282 | // pci_write_config_dword(pdev, 0x6c, 0x8000); | |
283 | ||
284 | if ((ret = pci_request_regions(fc_pci->pdev, DRIVER_NAME)) != 0) | |
285 | goto err_pci_disable_device; | |
286 | ||
287 | fc_pci->io_mem = pci_iomap(fc_pci->pdev, 0, 0x800); | |
288 | ||
289 | if (!fc_pci->io_mem) { | |
290 | err("cannot map io memory\n"); | |
291 | ret = -EIO; | |
292 | goto err_pci_release_regions; | |
293 | } | |
294 | ||
295 | pci_set_drvdata(fc_pci->pdev, fc_pci); | |
296 | ||
64221be7 | 297 | if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr, |
2add87a9 JS |
298 | SA_SHIRQ, DRIVER_NAME, fc_pci)) != 0) |
299 | goto err_pci_iounmap; | |
300 | ||
4853f16a JS |
301 | spin_lock_init(&fc_pci->irq_lock); |
302 | ||
2add87a9 JS |
303 | fc_pci->init_state |= FC_PCI_INIT; |
304 | goto success; | |
305 | ||
306 | err_pci_iounmap: | |
307 | pci_iounmap(fc_pci->pdev, fc_pci->io_mem); | |
308 | pci_set_drvdata(fc_pci->pdev, NULL); | |
309 | err_pci_release_regions: | |
310 | pci_release_regions(fc_pci->pdev); | |
311 | err_pci_disable_device: | |
312 | pci_disable_device(fc_pci->pdev); | |
313 | ||
314 | success: | |
315 | return ret; | |
316 | } | |
317 | ||
318 | static void flexcop_pci_exit(struct flexcop_pci *fc_pci) | |
319 | { | |
320 | if (fc_pci->init_state & FC_PCI_INIT) { | |
321 | free_irq(fc_pci->pdev->irq, fc_pci); | |
322 | pci_iounmap(fc_pci->pdev, fc_pci->io_mem); | |
323 | pci_set_drvdata(fc_pci->pdev, NULL); | |
324 | pci_release_regions(fc_pci->pdev); | |
325 | pci_disable_device(fc_pci->pdev); | |
326 | } | |
327 | fc_pci->init_state &= ~FC_PCI_INIT; | |
328 | } | |
329 | ||
330 | ||
331 | static int flexcop_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
332 | { | |
333 | struct flexcop_device *fc; | |
334 | struct flexcop_pci *fc_pci; | |
335 | int ret = -ENOMEM; | |
336 | ||
337 | if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) { | |
338 | err("out of memory\n"); | |
339 | return -ENOMEM; | |
340 | } | |
341 | ||
342 | /* general flexcop init */ | |
343 | fc_pci = fc->bus_specific; | |
344 | fc_pci->fc_dev = fc; | |
345 | ||
346 | fc->read_ibi_reg = flexcop_pci_read_ibi_reg; | |
347 | fc->write_ibi_reg = flexcop_pci_write_ibi_reg; | |
348 | fc->i2c_request = flexcop_i2c_request; | |
349 | fc->get_mac_addr = flexcop_eeprom_check_mac_addr; | |
350 | ||
351 | fc->stream_control = flexcop_pci_stream_control; | |
352 | ||
c4ee3fd4 JS |
353 | if (enable_pid_filtering) |
354 | info("will use the HW PID filter."); | |
355 | else | |
356 | info("will pass the complete TS to the demuxer."); | |
357 | ||
2add87a9 JS |
358 | fc->pid_filtering = enable_pid_filtering; |
359 | fc->bus_type = FC_PCI; | |
360 | ||
361 | fc->dev = &pdev->dev; | |
59a7ad6c | 362 | fc->owner = THIS_MODULE; |
2add87a9 JS |
363 | |
364 | /* bus specific part */ | |
365 | fc_pci->pdev = pdev; | |
366 | if ((ret = flexcop_pci_init(fc_pci)) != 0) | |
367 | goto err_kfree; | |
368 | ||
369 | /* init flexcop */ | |
370 | if ((ret = flexcop_device_initialize(fc)) != 0) | |
371 | goto err_pci_exit; | |
372 | ||
373 | /* init dma */ | |
374 | if ((ret = flexcop_pci_dma_init(fc_pci)) != 0) | |
375 | goto err_fc_exit; | |
376 | ||
64221be7 PB |
377 | INIT_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work, fc_pci); |
378 | ||
2add87a9 JS |
379 | goto success; |
380 | err_fc_exit: | |
381 | flexcop_device_exit(fc); | |
382 | err_pci_exit: | |
383 | flexcop_pci_exit(fc_pci); | |
384 | err_kfree: | |
385 | flexcop_device_kfree(fc); | |
386 | success: | |
387 | return ret; | |
388 | } | |
389 | ||
390 | /* in theory every _exit function should be called exactly two times, | |
391 | * here and in the bail-out-part of the _init-function | |
392 | */ | |
393 | static void flexcop_pci_remove(struct pci_dev *pdev) | |
394 | { | |
395 | struct flexcop_pci *fc_pci = pci_get_drvdata(pdev); | |
396 | ||
397 | flexcop_pci_dma_exit(fc_pci); | |
398 | flexcop_device_exit(fc_pci->fc_dev); | |
399 | flexcop_pci_exit(fc_pci); | |
400 | flexcop_device_kfree(fc_pci->fc_dev); | |
401 | } | |
402 | ||
403 | static struct pci_device_id flexcop_pci_tbl[] = { | |
404 | { PCI_DEVICE(0x13d0, 0x2103) }, | |
64221be7 | 405 | /* { PCI_DEVICE(0x13d0, 0x2200) }, ? */ |
2add87a9 JS |
406 | { }, |
407 | }; | |
408 | ||
409 | MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl); | |
410 | ||
411 | static struct pci_driver flexcop_pci_driver = { | |
63b5c1c4 | 412 | .name = "b2c2_flexcop_pci", |
2add87a9 | 413 | .id_table = flexcop_pci_tbl, |
64221be7 PB |
414 | .probe = flexcop_pci_probe, |
415 | .remove = flexcop_pci_remove, | |
2add87a9 JS |
416 | }; |
417 | ||
418 | static int __init flexcop_pci_module_init(void) | |
419 | { | |
420 | return pci_register_driver(&flexcop_pci_driver); | |
421 | } | |
422 | ||
423 | static void __exit flexcop_pci_module_exit(void) | |
424 | { | |
425 | pci_unregister_driver(&flexcop_pci_driver); | |
426 | } | |
427 | ||
428 | module_init(flexcop_pci_module_init); | |
429 | module_exit(flexcop_pci_module_exit); | |
430 | ||
431 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
432 | MODULE_DESCRIPTION(DRIVER_NAME); | |
433 | MODULE_LICENSE("GPL"); |