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8#define FC_LOG_PREFIX "flexcop-pci"
9#include "flexcop-common.h"
10
11static int enable_pid_filtering = 1;
12module_param(enable_pid_filtering, int, 0444);
13MODULE_PARM_DESC(enable_pid_filtering,
14 "enable hardware pid filtering: supported values: 0 (fullts), 1");
15
16static int irq_chk_intv = 100;
17module_param(irq_chk_intv, int, 0644);
18MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ streaming watchdog.");
19
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)
33#define deb_chk(args...) dprintk(0x10, args)
34
35static int debug;
36module_param(debug, int, 0644);
37MODULE_PARM_DESC(debug,
38 "set debug level (1=info,2=regs,4=TS,8=irqdma,16=check (|-able))."
39 DEBSTATUS);
40
41#define DRIVER_VERSION "0.1"
42#define DRIVER_NAME "flexcop-pci"
43#define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@posteo.de>"
44
45struct 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
55
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;
61 u32 last_dma1_cur_pos;
62
63 int count;
64 int count_prev;
65 int stream_problem;
66
67 spinlock_t irq_lock;
68 unsigned long last_irq;
69
70 struct delayed_work irq_check_work;
71 struct flexcop_device *fc_dev;
72};
73
74static int lastwreg, lastwval, lastrreg, lastrval;
75
76static flexcop_ibi_value flexcop_pci_read_ibi_reg(struct flexcop_device *fc,
77 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
91static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc,
92 flexcop_ibi_register r, flexcop_ibi_value v)
93{
94 struct flexcop_pci *fc_pci = fc->bus_specific;
95
96 if (lastwreg != r || lastwval != v.raw) {
97 lastwreg = r; lastwval = v.raw;
98 deb_reg("new wr: %3x: %08x\n", r, v.raw);
99 }
100
101 writel(v.raw, fc_pci->io_mem + r);
102 return 0;
103}
104
105static void flexcop_pci_irq_check_work(struct work_struct *work)
106{
107 struct flexcop_pci *fc_pci =
108 container_of(work, struct flexcop_pci, irq_check_work.work);
109 struct flexcop_device *fc = fc_pci->fc_dev;
110
111 if (fc->feedcount) {
112
113 if (fc_pci->count == fc_pci->count_prev) {
114 deb_chk("no IRQ since the last check\n");
115 if (fc_pci->stream_problem++ == 3) {
116 struct dvb_demux_feed *feed;
117 deb_info("flexcop-pci: stream problem, resetting pid filter\n");
118
119 spin_lock_irq(&fc->demux.lock);
120 list_for_each_entry(feed, &fc->demux.feed_list,
121 list_head) {
122 flexcop_pid_feed_control(fc, feed, 0);
123 }
124
125 list_for_each_entry(feed, &fc->demux.feed_list,
126 list_head) {
127 flexcop_pid_feed_control(fc, feed, 1);
128 }
129 spin_unlock_irq(&fc->demux.lock);
130
131 fc_pci->stream_problem = 0;
132 }
133 } else {
134 fc_pci->stream_problem = 0;
135 fc_pci->count_prev = fc_pci->count;
136 }
137 }
138
139 schedule_delayed_work(&fc_pci->irq_check_work,
140 msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
141}
142
143
144
145
146static irqreturn_t flexcop_pci_isr(int irq, void *dev_id)
147{
148 struct flexcop_pci *fc_pci = dev_id;
149 struct flexcop_device *fc = fc_pci->fc_dev;
150 unsigned long flags;
151 flexcop_ibi_value v;
152 irqreturn_t ret = IRQ_HANDLED;
153
154 spin_lock_irqsave(&fc_pci->irq_lock, flags);
155 v = fc->read_ibi_reg(fc, irq_20c);
156
157
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("Continuity 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
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,
173 fc_pci->dma[0].cpu_addr0,
174 fc_pci->dma[0].size / 188);
175 else
176 flexcop_pass_dmx_packets(fc_pci->fc_dev,
177 fc_pci->dma[0].cpu_addr1,
178 fc_pci->dma[0].size / 188);
179
180 deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr);
181 fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr;
182
183
184 } else if (v.irq_20c.DMA1_Timer_Status == 1) {
185 dma_addr_t cur_addr =
186 fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2;
187 u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0;
188
189 deb_irq("%u irq: %08x cur_addr: %llx: cur_pos: %08x, last_cur_pos: %08x ",
190 jiffies_to_usecs(jiffies - fc_pci->last_irq),
191 v.raw, (unsigned long long)cur_addr, cur_pos,
192 fc_pci->last_dma1_cur_pos);
193 fc_pci->last_irq = jiffies;
194
195
196
197
198 if (cur_pos < fc_pci->last_dma1_cur_pos) {
199 deb_irq(" end was reached: passing %d bytes ",
200 (fc_pci->dma[0].size*2 - 1) -
201 fc_pci->last_dma1_cur_pos);
202 flexcop_pass_dmx_data(fc_pci->fc_dev,
203 fc_pci->dma[0].cpu_addr0 +
204 fc_pci->last_dma1_cur_pos,
205 (fc_pci->dma[0].size*2) -
206 fc_pci->last_dma1_cur_pos);
207 fc_pci->last_dma1_cur_pos = 0;
208 }
209
210 if (cur_pos > fc_pci->last_dma1_cur_pos) {
211 deb_irq(" passing %d bytes ",
212 cur_pos - fc_pci->last_dma1_cur_pos);
213 flexcop_pass_dmx_data(fc_pci->fc_dev,
214 fc_pci->dma[0].cpu_addr0 +
215 fc_pci->last_dma1_cur_pos,
216 cur_pos - fc_pci->last_dma1_cur_pos);
217 }
218 deb_irq("\n");
219
220 fc_pci->last_dma1_cur_pos = cur_pos;
221 fc_pci->count++;
222 } else {
223 deb_irq("isr for flexcop called, apparently without reason (%08x)\n",
224 v.raw);
225 ret = IRQ_NONE;
226 }
227
228 spin_unlock_irqrestore(&fc_pci->irq_lock, flags);
229 return ret;
230}
231
232static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff)
233{
234 struct flexcop_pci *fc_pci = fc->bus_specific;
235 if (onoff) {
236 flexcop_dma_config(fc, &fc_pci->dma[0], FC_DMA_1);
237 flexcop_dma_config(fc, &fc_pci->dma[1], FC_DMA_2);
238 flexcop_dma_config_timer(fc, FC_DMA_1, 0);
239 flexcop_dma_xfer_control(fc, FC_DMA_1,
240 FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1, 1);
241 deb_irq("DMA xfer enabled\n");
242
243 fc_pci->last_dma1_cur_pos = 0;
244 flexcop_dma_control_timer_irq(fc, FC_DMA_1, 1);
245 deb_irq("IRQ enabled\n");
246 fc_pci->count_prev = fc_pci->count;
247 } else {
248 flexcop_dma_control_timer_irq(fc, FC_DMA_1, 0);
249 deb_irq("IRQ disabled\n");
250
251 flexcop_dma_xfer_control(fc, FC_DMA_1,
252 FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1, 0);
253 deb_irq("DMA xfer disabled\n");
254 }
255 return 0;
256}
257
258static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci)
259{
260 int ret;
261 ret = flexcop_dma_allocate(fc_pci->pdev, &fc_pci->dma[0],
262 FC_DEFAULT_DMA1_BUFSIZE);
263 if (ret != 0)
264 return ret;
265
266 ret = flexcop_dma_allocate(fc_pci->pdev, &fc_pci->dma[1],
267 FC_DEFAULT_DMA2_BUFSIZE);
268 if (ret != 0) {
269 flexcop_dma_free(&fc_pci->dma[0]);
270 return ret;
271 }
272
273 flexcop_sram_set_dest(fc_pci->fc_dev, FC_SRAM_DEST_MEDIA |
274 FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1);
275 flexcop_sram_set_dest(fc_pci->fc_dev, FC_SRAM_DEST_CAO |
276 FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2);
277 fc_pci->init_state |= FC_PCI_DMA_INIT;
278 return ret;
279}
280
281static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci)
282{
283 if (fc_pci->init_state & FC_PCI_DMA_INIT) {
284 flexcop_dma_free(&fc_pci->dma[0]);
285 flexcop_dma_free(&fc_pci->dma[1]);
286 }
287 fc_pci->init_state &= ~FC_PCI_DMA_INIT;
288}
289
290static int flexcop_pci_init(struct flexcop_pci *fc_pci)
291{
292 int ret;
293
294 info("card revision %x", fc_pci->pdev->revision);
295
296 if ((ret = pci_enable_device(fc_pci->pdev)) != 0)
297 return ret;
298 pci_set_master(fc_pci->pdev);
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);
312 spin_lock_init(&fc_pci->irq_lock);
313 if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr,
314 IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0)
315 goto err_pci_iounmap;
316
317 fc_pci->init_state |= FC_PCI_INIT;
318 return ret;
319
320err_pci_iounmap:
321 pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
322err_pci_release_regions:
323 pci_release_regions(fc_pci->pdev);
324err_pci_disable_device:
325 pci_disable_device(fc_pci->pdev);
326 return ret;
327}
328
329static void flexcop_pci_exit(struct flexcop_pci *fc_pci)
330{
331 if (fc_pci->init_state & FC_PCI_INIT) {
332 free_irq(fc_pci->pdev->irq, fc_pci);
333 pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
334 pci_release_regions(fc_pci->pdev);
335 pci_disable_device(fc_pci->pdev);
336 }
337 fc_pci->init_state &= ~FC_PCI_INIT;
338}
339
340static int flexcop_pci_probe(struct pci_dev *pdev,
341 const struct pci_device_id *ent)
342{
343 struct flexcop_device *fc;
344 struct flexcop_pci *fc_pci;
345 int ret = -ENOMEM;
346
347 if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) {
348 err("out of memory\n");
349 return -ENOMEM;
350 }
351
352
353 fc_pci = fc->bus_specific;
354 fc_pci->fc_dev = fc;
355
356 fc->read_ibi_reg = flexcop_pci_read_ibi_reg;
357 fc->write_ibi_reg = flexcop_pci_write_ibi_reg;
358 fc->i2c_request = flexcop_i2c_request;
359 fc->get_mac_addr = flexcop_eeprom_check_mac_addr;
360 fc->stream_control = flexcop_pci_stream_control;
361
362 if (enable_pid_filtering)
363 info("will use the HW PID filter.");
364 else
365 info("will pass the complete TS to the demuxer.");
366
367 fc->pid_filtering = enable_pid_filtering;
368 fc->bus_type = FC_PCI;
369 fc->dev = &pdev->dev;
370 fc->owner = THIS_MODULE;
371
372
373 fc_pci->pdev = pdev;
374 if ((ret = flexcop_pci_init(fc_pci)) != 0)
375 goto err_kfree;
376
377
378 if ((ret = flexcop_device_initialize(fc)) != 0)
379 goto err_pci_exit;
380
381
382 if ((ret = flexcop_pci_dma_init(fc_pci)) != 0)
383 goto err_fc_exit;
384
385 INIT_DELAYED_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work);
386
387 if (irq_chk_intv > 0)
388 schedule_delayed_work(&fc_pci->irq_check_work,
389 msecs_to_jiffies(irq_chk_intv < 100 ?
390 100 :
391 irq_chk_intv));
392 return ret;
393
394err_fc_exit:
395 flexcop_device_exit(fc);
396err_pci_exit:
397 flexcop_pci_exit(fc_pci);
398err_kfree:
399 flexcop_device_kfree(fc);
400 return ret;
401}
402
403
404
405
406static void flexcop_pci_remove(struct pci_dev *pdev)
407{
408 struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
409
410 if (irq_chk_intv > 0)
411 cancel_delayed_work(&fc_pci->irq_check_work);
412
413 flexcop_pci_dma_exit(fc_pci);
414 flexcop_device_exit(fc_pci->fc_dev);
415 flexcop_pci_exit(fc_pci);
416 flexcop_device_kfree(fc_pci->fc_dev);
417}
418
419static const struct pci_device_id flexcop_pci_tbl[] = {
420 { PCI_DEVICE(0x13d0, 0x2103) },
421 { },
422};
423
424MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl);
425
426static struct pci_driver flexcop_pci_driver = {
427 .name = "b2c2_flexcop_pci",
428 .id_table = flexcop_pci_tbl,
429 .probe = flexcop_pci_probe,
430 .remove = flexcop_pci_remove,
431};
432
433module_pci_driver(flexcop_pci_driver);
434
435MODULE_AUTHOR(DRIVER_AUTHOR);
436MODULE_DESCRIPTION(DRIVER_NAME);
437MODULE_LICENSE("GPL");
438
