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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 | ||
382c5546 | 16 | static int irq_chk_intv = 100; |
64221be7 | 17 | module_param(irq_chk_intv, int, 0644); |
382c5546 | 18 | MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ streaming watchdog."); |
64221be7 | 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 | 34 | |
ff699e6b | 35 | static int debug; |
2add87a9 | 36 | module_param(debug, int, 0644); |
382c5546 PB |
37 | MODULE_PARM_DESC(debug, |
38 | "set debug level (1=info,2=regs,4=TS,8=irqdma,16=check (|-able))." | |
39 | DEBSTATUS); | |
2add87a9 JS |
40 | |
41 | #define DRIVER_VERSION "0.1" | |
42 | #define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV PCI Driver" | |
43 | #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>" | |
44 | ||
45 | struct flexcop_pci { | |
46 | struct pci_dev *pdev; | |
47 | ||
48 | #define FC_PCI_INIT 0x01 | |
49 | #define FC_PCI_DMA_INIT 0x02 | |
50 | int init_state; | |
51 | ||
52 | void __iomem *io_mem; | |
53 | u32 irq; | |
54 | /* buffersize (at least for DMA1, need to be % 188 == 0, | |
c4ee3fd4 | 55 | * this logic is required */ |
2add87a9 JS |
56 | #define FC_DEFAULT_DMA1_BUFSIZE (1280 * 188) |
57 | #define FC_DEFAULT_DMA2_BUFSIZE (10 * 188) | |
58 | struct flexcop_dma dma[2]; | |
59 | ||
60 | int active_dma1_addr; /* 0 = addr0 of dma1; 1 = addr1 of dma1 */ | |
61 | u32 last_dma1_cur_pos; /* position of the pointer last time the timer/packet irq occured */ | |
c4ee3fd4 | 62 | int count; |
382c5546 PB |
63 | int count_prev; |
64 | int stream_problem; | |
2add87a9 | 65 | |
4853f16a JS |
66 | spinlock_t irq_lock; |
67 | ||
64221be7 PB |
68 | unsigned long last_irq; |
69 | ||
c4028958 | 70 | struct delayed_work irq_check_work; |
64221be7 | 71 | |
2add87a9 JS |
72 | struct flexcop_device *fc_dev; |
73 | }; | |
74 | ||
75 | static int lastwreg,lastwval,lastrreg,lastrval; | |
76 | ||
77 | static flexcop_ibi_value flexcop_pci_read_ibi_reg (struct flexcop_device *fc, flexcop_ibi_register r) | |
78 | { | |
79 | struct flexcop_pci *fc_pci = fc->bus_specific; | |
80 | flexcop_ibi_value v; | |
81 | v.raw = readl(fc_pci->io_mem + r); | |
82 | ||
83 | if (lastrreg != r || lastrval != v.raw) { | |
84 | lastrreg = r; lastrval = v.raw; | |
85 | deb_reg("new rd: %3x: %08x\n",r,v.raw); | |
86 | } | |
87 | ||
88 | return v; | |
89 | } | |
90 | ||
91 | static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register r, flexcop_ibi_value v) | |
92 | { | |
93 | struct flexcop_pci *fc_pci = fc->bus_specific; | |
94 | ||
95 | if (lastwreg != r || lastwval != v.raw) { | |
96 | lastwreg = r; lastwval = v.raw; | |
97 | deb_reg("new wr: %3x: %08x\n",r,v.raw); | |
98 | } | |
99 | ||
100 | writel(v.raw, fc_pci->io_mem + r); | |
101 | return 0; | |
102 | } | |
103 | ||
c4028958 | 104 | static void flexcop_pci_irq_check_work(struct work_struct *work) |
64221be7 | 105 | { |
c4028958 DH |
106 | struct flexcop_pci *fc_pci = |
107 | container_of(work, struct flexcop_pci, irq_check_work.work); | |
64221be7 PB |
108 | struct flexcop_device *fc = fc_pci->fc_dev; |
109 | ||
382c5546 PB |
110 | if (fc->feedcount) { |
111 | ||
112 | if (fc_pci->count == fc_pci->count_prev) { | |
113 | deb_chk("no IRQ since the last check\n"); | |
114 | if (fc_pci->stream_problem++ == 3) { | |
115 | struct dvb_demux_feed *feed; | |
a27e4fd3 | 116 | deb_info("flexcop-pci: stream problem, resetting pid filter\n"); |
382c5546 PB |
117 | |
118 | spin_lock_irq(&fc->demux.lock); | |
119 | list_for_each_entry(feed, &fc->demux.feed_list, | |
120 | list_head) { | |
121 | flexcop_pid_feed_control(fc, feed, 0); | |
122 | } | |
123 | ||
124 | list_for_each_entry(feed, &fc->demux.feed_list, | |
125 | list_head) { | |
126 | flexcop_pid_feed_control(fc, feed, 1); | |
127 | } | |
128 | spin_unlock_irq(&fc->demux.lock); | |
129 | ||
130 | fc_pci->stream_problem = 0; | |
131 | } | |
132 | } else { | |
133 | fc_pci->stream_problem = 0; | |
134 | fc_pci->count_prev = fc_pci->count; | |
135 | } | |
136 | } | |
64221be7 PB |
137 | |
138 | schedule_delayed_work(&fc_pci->irq_check_work, | |
139 | msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv)); | |
140 | } | |
141 | ||
2add87a9 JS |
142 | /* When PID filtering is turned on, we use the timer IRQ, because small amounts |
143 | * of data need to be passed to the user space instantly as well. When PID | |
144 | * filtering is turned off, we use the page-change-IRQ */ | |
7d12e780 | 145 | static irqreturn_t flexcop_pci_isr(int irq, void *dev_id) |
2add87a9 JS |
146 | { |
147 | struct flexcop_pci *fc_pci = dev_id; | |
148 | struct flexcop_device *fc = fc_pci->fc_dev; | |
4f210e07 | 149 | unsigned long flags; |
64221be7 | 150 | flexcop_ibi_value v; |
4853f16a JS |
151 | irqreturn_t ret = IRQ_HANDLED; |
152 | ||
4f210e07 | 153 | spin_lock_irqsave(&fc_pci->irq_lock,flags); |
2add87a9 | 154 | |
64221be7 PB |
155 | v = fc->read_ibi_reg(fc,irq_20c); |
156 | ||
157 | /* errors */ | |
158 | if (v.irq_20c.Data_receiver_error) | |
159 | deb_chk("data receiver error\n"); | |
160 | if (v.irq_20c.Continuity_error_flag) | |
161 | deb_chk("Contunuity error flag is set\n"); | |
162 | if (v.irq_20c.LLC_SNAP_FLAG_set) | |
163 | deb_chk("LLC_SNAP_FLAG_set is set\n"); | |
164 | if (v.irq_20c.Transport_Error) | |
165 | deb_chk("Transport error\n"); | |
166 | ||
167 | if ((fc_pci->count % 1000) == 0) | |
168 | deb_chk("%d valid irq took place so far\n",fc_pci->count); | |
169 | ||
2add87a9 JS |
170 | if (v.irq_20c.DMA1_IRQ_Status == 1) { |
171 | if (fc_pci->active_dma1_addr == 0) | |
172 | flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr0,fc_pci->dma[0].size / 188); | |
173 | else | |
174 | flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr1,fc_pci->dma[0].size / 188); | |
175 | ||
176 | deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr); | |
177 | fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr; | |
178 | } else if (v.irq_20c.DMA1_Timer_Status == 1) { | |
179 | /* for the timer IRQ we only can use buffer dmx feeding, because we don't have | |
180 | * complete TS packets when reading from the DMA memory */ | |
181 | dma_addr_t cur_addr = | |
182 | fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2; | |
183 | u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0; | |
184 | ||
608268b2 RD |
185 | deb_irq("%u irq: %08x cur_addr: %llx: cur_pos: %08x, last_cur_pos: %08x ", |
186 | jiffies_to_usecs(jiffies - fc_pci->last_irq), | |
187 | v.raw, (unsigned long long)cur_addr, cur_pos, | |
188 | fc_pci->last_dma1_cur_pos); | |
64221be7 | 189 | fc_pci->last_irq = jiffies; |
c4ee3fd4 | 190 | |
2add87a9 JS |
191 | /* buffer end was reached, restarted from the beginning |
192 | * pass the data from last_cur_pos to the buffer end to the demux | |
193 | */ | |
194 | if (cur_pos < fc_pci->last_dma1_cur_pos) { | |
c4ee3fd4 | 195 | deb_irq(" end was reached: passing %d bytes ",(fc_pci->dma[0].size*2 - 1) - fc_pci->last_dma1_cur_pos); |
2add87a9 JS |
196 | flexcop_pass_dmx_data(fc_pci->fc_dev, |
197 | fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos, | |
c4ee3fd4 | 198 | (fc_pci->dma[0].size*2) - fc_pci->last_dma1_cur_pos); |
2add87a9 JS |
199 | fc_pci->last_dma1_cur_pos = 0; |
200 | } | |
201 | ||
202 | if (cur_pos > fc_pci->last_dma1_cur_pos) { | |
c4ee3fd4 | 203 | deb_irq(" passing %d bytes ",cur_pos - fc_pci->last_dma1_cur_pos); |
2add87a9 JS |
204 | flexcop_pass_dmx_data(fc_pci->fc_dev, |
205 | fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos, | |
206 | cur_pos - fc_pci->last_dma1_cur_pos); | |
207 | } | |
c4ee3fd4 | 208 | deb_irq("\n"); |
2add87a9 JS |
209 | |
210 | fc_pci->last_dma1_cur_pos = cur_pos; | |
64221be7 PB |
211 | fc_pci->count++; |
212 | } else { | |
213 | deb_irq("isr for flexcop called, apparently without reason (%08x)\n",v.raw); | |
4853f16a | 214 | ret = IRQ_NONE; |
64221be7 | 215 | } |
4853f16a | 216 | |
4f210e07 | 217 | spin_unlock_irqrestore(&fc_pci->irq_lock,flags); |
2add87a9 | 218 | |
4853f16a | 219 | return ret; |
2add87a9 JS |
220 | } |
221 | ||
222 | static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff) | |
223 | { | |
224 | struct flexcop_pci *fc_pci = fc->bus_specific; | |
225 | if (onoff) { | |
64221be7 PB |
226 | flexcop_dma_config(fc,&fc_pci->dma[0],FC_DMA_1); |
227 | flexcop_dma_config(fc,&fc_pci->dma[1],FC_DMA_2); | |
2add87a9 | 228 | |
64221be7 | 229 | flexcop_dma_config_timer(fc,FC_DMA_1,0); |
2add87a9 | 230 | |
64221be7 PB |
231 | flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1,1); |
232 | deb_irq("DMA xfer enabled\n"); | |
2add87a9 | 233 | |
64221be7 PB |
234 | fc_pci->last_dma1_cur_pos = 0; |
235 | flexcop_dma_control_timer_irq(fc,FC_DMA_1,1); | |
236 | deb_irq("IRQ enabled\n"); | |
237 | ||
382c5546 PB |
238 | fc_pci->count_prev = fc_pci->count; |
239 | ||
64221be7 PB |
240 | // fc_pci->active_dma1_addr = 0; |
241 | // flexcop_dma_control_size_irq(fc,FC_DMA_1,1); | |
242 | ||
2add87a9 | 243 | } else { |
64221be7 PB |
244 | flexcop_dma_control_timer_irq(fc,FC_DMA_1,0); |
245 | deb_irq("IRQ disabled\n"); | |
2add87a9 | 246 | |
64221be7 PB |
247 | // flexcop_dma_control_size_irq(fc,FC_DMA_1,0); |
248 | ||
249 | flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1,0); | |
250 | deb_irq("DMA xfer disabled\n"); | |
2add87a9 JS |
251 | } |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci) | |
257 | { | |
258 | int ret; | |
259 | if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[0],FC_DEFAULT_DMA1_BUFSIZE)) != 0) | |
260 | return ret; | |
261 | ||
8397703e TP |
262 | if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[1],FC_DEFAULT_DMA2_BUFSIZE)) != 0) { |
263 | flexcop_dma_free(&fc_pci->dma[0]); | |
264 | return ret; | |
265 | } | |
2add87a9 JS |
266 | |
267 | flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_MEDIA | FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1); | |
268 | flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2); | |
269 | ||
270 | fc_pci->init_state |= FC_PCI_DMA_INIT; | |
64221be7 | 271 | |
2add87a9 JS |
272 | return ret; |
273 | } | |
274 | ||
275 | static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci) | |
276 | { | |
277 | if (fc_pci->init_state & FC_PCI_DMA_INIT) { | |
278 | flexcop_dma_free(&fc_pci->dma[0]); | |
279 | flexcop_dma_free(&fc_pci->dma[1]); | |
280 | } | |
281 | fc_pci->init_state &= ~FC_PCI_DMA_INIT; | |
282 | } | |
283 | ||
284 | static int flexcop_pci_init(struct flexcop_pci *fc_pci) | |
285 | { | |
286 | int ret; | |
287 | u8 card_rev; | |
288 | ||
289 | pci_read_config_byte(fc_pci->pdev, PCI_CLASS_REVISION, &card_rev); | |
290 | info("card revision %x", card_rev); | |
291 | ||
292 | if ((ret = pci_enable_device(fc_pci->pdev)) != 0) | |
293 | return ret; | |
294 | ||
295 | pci_set_master(fc_pci->pdev); | |
296 | ||
297 | /* enable interrupts */ | |
298 | // pci_write_config_dword(pdev, 0x6c, 0x8000); | |
299 | ||
300 | if ((ret = pci_request_regions(fc_pci->pdev, DRIVER_NAME)) != 0) | |
301 | goto err_pci_disable_device; | |
302 | ||
303 | fc_pci->io_mem = pci_iomap(fc_pci->pdev, 0, 0x800); | |
304 | ||
305 | if (!fc_pci->io_mem) { | |
306 | err("cannot map io memory\n"); | |
307 | ret = -EIO; | |
308 | goto err_pci_release_regions; | |
309 | } | |
310 | ||
311 | pci_set_drvdata(fc_pci->pdev, fc_pci); | |
4f210e07 | 312 | spin_lock_init(&fc_pci->irq_lock); |
64221be7 | 313 | if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr, |
8076fe32 | 314 | IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0) |
2add87a9 JS |
315 | goto err_pci_iounmap; |
316 | ||
317 | fc_pci->init_state |= FC_PCI_INIT; | |
8397703e | 318 | return ret; |
2add87a9 JS |
319 | |
320 | err_pci_iounmap: | |
321 | pci_iounmap(fc_pci->pdev, fc_pci->io_mem); | |
322 | pci_set_drvdata(fc_pci->pdev, NULL); | |
323 | err_pci_release_regions: | |
324 | pci_release_regions(fc_pci->pdev); | |
325 | err_pci_disable_device: | |
326 | pci_disable_device(fc_pci->pdev); | |
2add87a9 JS |
327 | return ret; |
328 | } | |
329 | ||
330 | static void flexcop_pci_exit(struct flexcop_pci *fc_pci) | |
331 | { | |
332 | if (fc_pci->init_state & FC_PCI_INIT) { | |
333 | free_irq(fc_pci->pdev->irq, fc_pci); | |
334 | pci_iounmap(fc_pci->pdev, fc_pci->io_mem); | |
335 | pci_set_drvdata(fc_pci->pdev, NULL); | |
336 | pci_release_regions(fc_pci->pdev); | |
337 | pci_disable_device(fc_pci->pdev); | |
338 | } | |
339 | fc_pci->init_state &= ~FC_PCI_INIT; | |
340 | } | |
341 | ||
342 | ||
343 | static int flexcop_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
344 | { | |
345 | struct flexcop_device *fc; | |
346 | struct flexcop_pci *fc_pci; | |
347 | int ret = -ENOMEM; | |
348 | ||
349 | if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) { | |
350 | err("out of memory\n"); | |
351 | return -ENOMEM; | |
352 | } | |
353 | ||
354 | /* general flexcop init */ | |
355 | fc_pci = fc->bus_specific; | |
356 | fc_pci->fc_dev = fc; | |
357 | ||
358 | fc->read_ibi_reg = flexcop_pci_read_ibi_reg; | |
359 | fc->write_ibi_reg = flexcop_pci_write_ibi_reg; | |
360 | fc->i2c_request = flexcop_i2c_request; | |
361 | fc->get_mac_addr = flexcop_eeprom_check_mac_addr; | |
362 | ||
363 | fc->stream_control = flexcop_pci_stream_control; | |
364 | ||
c4ee3fd4 JS |
365 | if (enable_pid_filtering) |
366 | info("will use the HW PID filter."); | |
367 | else | |
368 | info("will pass the complete TS to the demuxer."); | |
369 | ||
2add87a9 JS |
370 | fc->pid_filtering = enable_pid_filtering; |
371 | fc->bus_type = FC_PCI; | |
372 | ||
373 | fc->dev = &pdev->dev; | |
59a7ad6c | 374 | fc->owner = THIS_MODULE; |
2add87a9 JS |
375 | |
376 | /* bus specific part */ | |
377 | fc_pci->pdev = pdev; | |
378 | if ((ret = flexcop_pci_init(fc_pci)) != 0) | |
379 | goto err_kfree; | |
380 | ||
381 | /* init flexcop */ | |
382 | if ((ret = flexcop_device_initialize(fc)) != 0) | |
383 | goto err_pci_exit; | |
384 | ||
385 | /* init dma */ | |
386 | if ((ret = flexcop_pci_dma_init(fc_pci)) != 0) | |
387 | goto err_fc_exit; | |
388 | ||
c4028958 | 389 | INIT_DELAYED_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work); |
64221be7 | 390 | |
382c5546 PB |
391 | if (irq_chk_intv > 0) |
392 | schedule_delayed_work(&fc_pci->irq_check_work, | |
393 | msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv)); | |
394 | ||
8397703e TP |
395 | return ret; |
396 | ||
2add87a9 JS |
397 | err_fc_exit: |
398 | flexcop_device_exit(fc); | |
399 | err_pci_exit: | |
400 | flexcop_pci_exit(fc_pci); | |
401 | err_kfree: | |
402 | flexcop_device_kfree(fc); | |
2add87a9 JS |
403 | return ret; |
404 | } | |
405 | ||
406 | /* in theory every _exit function should be called exactly two times, | |
407 | * here and in the bail-out-part of the _init-function | |
408 | */ | |
409 | static void flexcop_pci_remove(struct pci_dev *pdev) | |
410 | { | |
411 | struct flexcop_pci *fc_pci = pci_get_drvdata(pdev); | |
412 | ||
382c5546 PB |
413 | if (irq_chk_intv > 0) |
414 | cancel_delayed_work(&fc_pci->irq_check_work); | |
415 | ||
2add87a9 JS |
416 | flexcop_pci_dma_exit(fc_pci); |
417 | flexcop_device_exit(fc_pci->fc_dev); | |
418 | flexcop_pci_exit(fc_pci); | |
419 | flexcop_device_kfree(fc_pci->fc_dev); | |
420 | } | |
421 | ||
422 | static struct pci_device_id flexcop_pci_tbl[] = { | |
423 | { PCI_DEVICE(0x13d0, 0x2103) }, | |
64221be7 | 424 | /* { PCI_DEVICE(0x13d0, 0x2200) }, ? */ |
2add87a9 JS |
425 | { }, |
426 | }; | |
427 | ||
428 | MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl); | |
429 | ||
430 | static struct pci_driver flexcop_pci_driver = { | |
63b5c1c4 | 431 | .name = "b2c2_flexcop_pci", |
2add87a9 | 432 | .id_table = flexcop_pci_tbl, |
64221be7 PB |
433 | .probe = flexcop_pci_probe, |
434 | .remove = flexcop_pci_remove, | |
2add87a9 JS |
435 | }; |
436 | ||
437 | static int __init flexcop_pci_module_init(void) | |
438 | { | |
439 | return pci_register_driver(&flexcop_pci_driver); | |
440 | } | |
441 | ||
442 | static void __exit flexcop_pci_module_exit(void) | |
443 | { | |
444 | pci_unregister_driver(&flexcop_pci_driver); | |
445 | } | |
446 | ||
447 | module_init(flexcop_pci_module_init); | |
448 | module_exit(flexcop_pci_module_exit); | |
449 | ||
450 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
451 | MODULE_DESCRIPTION(DRIVER_NAME); | |
452 | MODULE_LICENSE("GPL"); |