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7#define FC_LOG_PREFIX "flexcop-pci"
8#include "flexcop-common.h"
9
10static int enable_pid_filtering = 1;
11module_param(enable_pid_filtering, int, 0444);
12MODULE_PARM_DESC(enable_pid_filtering,
13 "enable hardware pid filtering: supported values: 0 (fullts), 1");
14
15static int irq_chk_intv = 100;
16module_param(irq_chk_intv, int, 0644);
17MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ streaming watchdog.");
18
19#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
20#define dprintk(level, args...) \
21 do { if ((debug & (level))) printk(args); } while (0)
22#define DEBSTATUS ""
23#else
24#define dprintk(level, args...) no_printk(args)
25#define DEBSTATUS " (debugging is not enabled)"
26#endif
27
28#define deb_info(args...) dprintk(0x01, args)
29#define deb_reg(args...) dprintk(0x02, args)
30#define deb_ts(args...) dprintk(0x04, args)
31#define deb_irq(args...) dprintk(0x08, args)
32#define deb_chk(args...) dprintk(0x10, args)
33
34static int debug;
35module_param(debug, int, 0644);
36MODULE_PARM_DESC(debug,
37 "set debug level (1=info,2=regs,4=TS,8=irqdma,16=check (|-able))."
38 DEBSTATUS);
39
40#define DRIVER_VERSION "0.1"
41#define DRIVER_NAME "flexcop-pci"
42#define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@posteo.de>"
43
44struct flexcop_pci {
45 struct pci_dev *pdev;
46
47#define FC_PCI_INIT 0x01
48#define FC_PCI_DMA_INIT 0x02
49 int init_state;
50
51 void __iomem *io_mem;
52 u32 irq;
53
54
55#define FC_DEFAULT_DMA1_BUFSIZE (1280 * 188)
56#define FC_DEFAULT_DMA2_BUFSIZE (10 * 188)
57 struct flexcop_dma dma[2];
58
59 int active_dma1_addr;
60 u32 last_dma1_cur_pos;
61
62 int count;
63 int count_prev;
64 int stream_problem;
65
66 spinlock_t irq_lock;
67 unsigned long last_irq;
68
69 struct delayed_work irq_check_work;
70 struct flexcop_device *fc_dev;
71};
72
73static int lastwreg, lastwval, lastrreg, lastrval;
74
75static flexcop_ibi_value flexcop_pci_read_ibi_reg(struct flexcop_device *fc,
76 flexcop_ibi_register r)
77{
78 struct flexcop_pci *fc_pci = fc->bus_specific;
79 flexcop_ibi_value v;
80 v.raw = readl(fc_pci->io_mem + r);
81
82 if (lastrreg != r || lastrval != v.raw) {
83 lastrreg = r; lastrval = v.raw;
84 deb_reg("new rd: %3x: %08x\n", r, v.raw);
85 }
86
87 return v;
88}
89
90static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc,
91 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
104static void flexcop_pci_irq_check_work(struct work_struct *work)
105{
106 struct flexcop_pci *fc_pci =
107 container_of(work, struct flexcop_pci, irq_check_work.work);
108 struct flexcop_device *fc = fc_pci->fc_dev;
109
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;
116 deb_info("flexcop-pci: stream problem, resetting pid filter\n");
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 }
137
138 schedule_delayed_work(&fc_pci->irq_check_work,
139 msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
140}
141
142
143
144
145static irqreturn_t flexcop_pci_isr(int irq, void *dev_id)
146{
147 struct flexcop_pci *fc_pci = dev_id;
148 struct flexcop_device *fc = fc_pci->fc_dev;
149 unsigned long flags;
150 flexcop_ibi_value v;
151 irqreturn_t ret = IRQ_HANDLED;
152
153 spin_lock_irqsave(&fc_pci->irq_lock, flags);
154 v = fc->read_ibi_reg(fc, irq_20c);
155
156
157 if (v.irq_20c.Data_receiver_error)
158 deb_chk("data receiver error\n");
159 if (v.irq_20c.Continuity_error_flag)
160 deb_chk("Continuity error flag is set\n");
161 if (v.irq_20c.LLC_SNAP_FLAG_set)
162 deb_chk("LLC_SNAP_FLAG_set is set\n");
163 if (v.irq_20c.Transport_Error)
164 deb_chk("Transport error\n");
165
166 if ((fc_pci->count % 1000) == 0)
167 deb_chk("%d valid irq took place so far\n", fc_pci->count);
168
169 if (v.irq_20c.DMA1_IRQ_Status == 1) {
170 if (fc_pci->active_dma1_addr == 0)
171 flexcop_pass_dmx_packets(fc_pci->fc_dev,
172 fc_pci->dma[0].cpu_addr0,
173 fc_pci->dma[0].size / 188);
174 else
175 flexcop_pass_dmx_packets(fc_pci->fc_dev,
176 fc_pci->dma[0].cpu_addr1,
177 fc_pci->dma[0].size / 188);
178
179 deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr);
180 fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr;
181
182
183 } else if (v.irq_20c.DMA1_Timer_Status == 1) {
184 dma_addr_t cur_addr =
185 fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2;
186 u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0;
187
188 deb_irq("%u irq: %08x cur_addr: %llx: cur_pos: %08x, last_cur_pos: %08x ",
189 jiffies_to_usecs(jiffies - fc_pci->last_irq),
190 v.raw, (unsigned long long)cur_addr, cur_pos,
191 fc_pci->last_dma1_cur_pos);
192 fc_pci->last_irq = jiffies;
193
194
195
196
197 if (cur_pos < fc_pci->last_dma1_cur_pos) {
198 deb_irq(" end was reached: passing %d bytes ",
199 (fc_pci->dma[0].size*2 - 1) -
200 fc_pci->last_dma1_cur_pos);
201 flexcop_pass_dmx_data(fc_pci->fc_dev,
202 fc_pci->dma[0].cpu_addr0 +
203 fc_pci->last_dma1_cur_pos,
204 (fc_pci->dma[0].size*2) -
205 fc_pci->last_dma1_cur_pos);
206 fc_pci->last_dma1_cur_pos = 0;
207 }
208
209 if (cur_pos > fc_pci->last_dma1_cur_pos) {
210 deb_irq(" passing %d bytes ",
211 cur_pos - fc_pci->last_dma1_cur_pos);
212 flexcop_pass_dmx_data(fc_pci->fc_dev,
213 fc_pci->dma[0].cpu_addr0 +
214 fc_pci->last_dma1_cur_pos,
215 cur_pos - fc_pci->last_dma1_cur_pos);
216 }
217 deb_irq("\n");
218
219 fc_pci->last_dma1_cur_pos = cur_pos;
220 fc_pci->count++;
221 } else {
222 deb_irq("isr for flexcop called, apparently without reason (%08x)\n",
223 v.raw);
224 ret = IRQ_NONE;
225 }
226
227 spin_unlock_irqrestore(&fc_pci->irq_lock, flags);
228 return ret;
229}
230
231static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff)
232{
233 struct flexcop_pci *fc_pci = fc->bus_specific;
234 if (onoff) {
235 flexcop_dma_config(fc, &fc_pci->dma[0], FC_DMA_1);
236 flexcop_dma_config(fc, &fc_pci->dma[1], FC_DMA_2);
237 flexcop_dma_config_timer(fc, FC_DMA_1, 0);
238 flexcop_dma_xfer_control(fc, FC_DMA_1,
239 FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1, 1);
240 deb_irq("DMA xfer enabled\n");
241
242 fc_pci->last_dma1_cur_pos = 0;
243 flexcop_dma_control_timer_irq(fc, FC_DMA_1, 1);
244 deb_irq("IRQ enabled\n");
245 fc_pci->count_prev = fc_pci->count;
246 } else {
247 flexcop_dma_control_timer_irq(fc, FC_DMA_1, 0);
248 deb_irq("IRQ disabled\n");
249
250 flexcop_dma_xfer_control(fc, FC_DMA_1,
251 FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1, 0);
252 deb_irq("DMA xfer disabled\n");
253 }
254 return 0;
255}
256
257static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci)
258{
259 int ret;
260 ret = flexcop_dma_allocate(fc_pci->pdev, &fc_pci->dma[0],
261 FC_DEFAULT_DMA1_BUFSIZE);
262 if (ret != 0)
263 return ret;
264
265 ret = flexcop_dma_allocate(fc_pci->pdev, &fc_pci->dma[1],
266 FC_DEFAULT_DMA2_BUFSIZE);
267 if (ret != 0) {
268 flexcop_dma_free(&fc_pci->dma[0]);
269 return ret;
270 }
271
272 flexcop_sram_set_dest(fc_pci->fc_dev, FC_SRAM_DEST_MEDIA |
273 FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1);
274 flexcop_sram_set_dest(fc_pci->fc_dev, FC_SRAM_DEST_CAO |
275 FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2);
276 fc_pci->init_state |= FC_PCI_DMA_INIT;
277 return ret;
278}
279
280static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci)
281{
282 if (fc_pci->init_state & FC_PCI_DMA_INIT) {
283 flexcop_dma_free(&fc_pci->dma[0]);
284 flexcop_dma_free(&fc_pci->dma[1]);
285 }
286 fc_pci->init_state &= ~FC_PCI_DMA_INIT;
287}
288
289static int flexcop_pci_init(struct flexcop_pci *fc_pci)
290{
291 int ret;
292
293 info("card revision %x", fc_pci->pdev->revision);
294
295 if ((ret = pci_enable_device(fc_pci->pdev)) != 0)
296 return ret;
297 pci_set_master(fc_pci->pdev);
298
299 if ((ret = pci_request_regions(fc_pci->pdev, DRIVER_NAME)) != 0)
300 goto err_pci_disable_device;
301
302 fc_pci->io_mem = pci_iomap(fc_pci->pdev, 0, 0x800);
303
304 if (!fc_pci->io_mem) {
305 err("cannot map io memory\n");
306 ret = -EIO;
307 goto err_pci_release_regions;
308 }
309
310 pci_set_drvdata(fc_pci->pdev, fc_pci);
311 spin_lock_init(&fc_pci->irq_lock);
312 if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr,
313 IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0)
314 goto err_pci_iounmap;
315
316 fc_pci->init_state |= FC_PCI_INIT;
317 return ret;
318
319err_pci_iounmap:
320 pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
321err_pci_release_regions:
322 pci_release_regions(fc_pci->pdev);
323err_pci_disable_device:
324 pci_disable_device(fc_pci->pdev);
325 return ret;
326}
327
328static void flexcop_pci_exit(struct flexcop_pci *fc_pci)
329{
330 if (fc_pci->init_state & FC_PCI_INIT) {
331 free_irq(fc_pci->pdev->irq, fc_pci);
332 pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
333 pci_release_regions(fc_pci->pdev);
334 pci_disable_device(fc_pci->pdev);
335 }
336 fc_pci->init_state &= ~FC_PCI_INIT;
337}
338
339static int flexcop_pci_probe(struct pci_dev *pdev,
340 const struct pci_device_id *ent)
341{
342 struct flexcop_device *fc;
343 struct flexcop_pci *fc_pci;
344 int ret = -ENOMEM;
345
346 if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) {
347 err("out of memory\n");
348 return -ENOMEM;
349 }
350
351
352 fc_pci = fc->bus_specific;
353 fc_pci->fc_dev = fc;
354
355 fc->read_ibi_reg = flexcop_pci_read_ibi_reg;
356 fc->write_ibi_reg = flexcop_pci_write_ibi_reg;
357 fc->i2c_request = flexcop_i2c_request;
358 fc->get_mac_addr = flexcop_eeprom_check_mac_addr;
359 fc->stream_control = flexcop_pci_stream_control;
360
361 if (enable_pid_filtering)
362 info("will use the HW PID filter.");
363 else
364 info("will pass the complete TS to the demuxer.");
365
366 fc->pid_filtering = enable_pid_filtering;
367 fc->bus_type = FC_PCI;
368 fc->dev = &pdev->dev;
369 fc->owner = THIS_MODULE;
370
371
372 fc_pci->pdev = pdev;
373 if ((ret = flexcop_pci_init(fc_pci)) != 0)
374 goto err_kfree;
375
376
377 if ((ret = flexcop_device_initialize(fc)) != 0)
378 goto err_pci_exit;
379
380
381 if ((ret = flexcop_pci_dma_init(fc_pci)) != 0)
382 goto err_fc_exit;
383
384 INIT_DELAYED_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work);
385
386 if (irq_chk_intv > 0)
387 schedule_delayed_work(&fc_pci->irq_check_work,
388 msecs_to_jiffies(irq_chk_intv < 100 ?
389 100 :
390 irq_chk_intv));
391 return ret;
392
393err_fc_exit:
394 flexcop_device_exit(fc);
395err_pci_exit:
396 flexcop_pci_exit(fc_pci);
397err_kfree:
398 flexcop_device_kfree(fc);
399 return ret;
400}
401
402
403
404
405static void flexcop_pci_remove(struct pci_dev *pdev)
406{
407 struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
408
409 if (irq_chk_intv > 0)
410 cancel_delayed_work(&fc_pci->irq_check_work);
411
412 flexcop_pci_dma_exit(fc_pci);
413 flexcop_device_exit(fc_pci->fc_dev);
414 flexcop_pci_exit(fc_pci);
415 flexcop_device_kfree(fc_pci->fc_dev);
416}
417
418static const struct pci_device_id flexcop_pci_tbl[] = {
419 { PCI_DEVICE(0x13d0, 0x2103) },
420 { },
421};
422
423MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl);
424
425static struct pci_driver flexcop_pci_driver = {
426 .name = "b2c2_flexcop_pci",
427 .id_table = flexcop_pci_tbl,
428 .probe = flexcop_pci_probe,
429 .remove = flexcop_pci_remove,
430};
431
432module_pci_driver(flexcop_pci_driver);
433
434MODULE_AUTHOR(DRIVER_AUTHOR);
435MODULE_DESCRIPTION(DRIVER_NAME);
436MODULE_LICENSE("GPL");
437
