WorkStruct: make allyesconfig
[linux-3.10.git] / drivers / media / dvb / b2c2 / flexcop-pci.c
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
12 static int enable_pid_filtering = 1;
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
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
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
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,
53  * this logic is required */
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 */
60         int count;
61
62         spinlock_t irq_lock;
63
64         unsigned long last_irq;
65
66         struct delayed_work irq_check_work;
67
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
100 static void flexcop_pci_irq_check_work(struct work_struct *work)
101 {
102         struct flexcop_pci *fc_pci =
103                 container_of(work, struct flexcop_pci, irq_check_work.work);
104         struct flexcop_device *fc = fc_pci->fc_dev;
105
106         flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
107
108         flexcop_dump_reg(fc_pci->fc_dev,dma1_000,4);
109
110         if (v.sram_dest_reg_714.net_ovflow_error)
111                 deb_chk("sram net_ovflow_error\n");
112         if (v.sram_dest_reg_714.media_ovflow_error)
113                 deb_chk("sram media_ovflow_error\n");
114         if (v.sram_dest_reg_714.cai_ovflow_error)
115                 deb_chk("sram cai_ovflow_error\n");
116         if (v.sram_dest_reg_714.cai_ovflow_error)
117                 deb_chk("sram cai_ovflow_error\n");
118
119         schedule_delayed_work(&fc_pci->irq_check_work,
120                         msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
121 }
122
123 /* When PID filtering is turned on, we use the timer IRQ, because small amounts
124  * of data need to be passed to the user space instantly as well. When PID
125  * filtering is turned off, we use the page-change-IRQ */
126 static irqreturn_t flexcop_pci_isr(int irq, void *dev_id)
127 {
128         struct flexcop_pci *fc_pci = dev_id;
129         struct flexcop_device *fc = fc_pci->fc_dev;
130         flexcop_ibi_value v;
131         irqreturn_t ret = IRQ_HANDLED;
132
133         spin_lock_irq(&fc_pci->irq_lock);
134
135         v = fc->read_ibi_reg(fc,irq_20c);
136
137    /* errors */
138         if (v.irq_20c.Data_receiver_error)
139                 deb_chk("data receiver error\n");
140         if (v.irq_20c.Continuity_error_flag)
141                 deb_chk("Contunuity error flag is set\n");
142         if (v.irq_20c.LLC_SNAP_FLAG_set)
143                 deb_chk("LLC_SNAP_FLAG_set is set\n");
144         if (v.irq_20c.Transport_Error)
145                 deb_chk("Transport error\n");
146
147         if ((fc_pci->count % 1000) == 0)
148                 deb_chk("%d valid irq took place so far\n",fc_pci->count);
149
150         if (v.irq_20c.DMA1_IRQ_Status == 1) {
151                 if (fc_pci->active_dma1_addr == 0)
152                         flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr0,fc_pci->dma[0].size / 188);
153                 else
154                         flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr1,fc_pci->dma[0].size / 188);
155
156                 deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr);
157                 fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr;
158         } else if (v.irq_20c.DMA1_Timer_Status == 1) {
159                 /* for the timer IRQ we only can use buffer dmx feeding, because we don't have
160                  * complete TS packets when reading from the DMA memory */
161                 dma_addr_t cur_addr =
162                         fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2;
163                 u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0;
164
165                 deb_irq("%u irq: %08x cur_addr: %llx: cur_pos: %08x, last_cur_pos: %08x ",
166                                 jiffies_to_usecs(jiffies - fc_pci->last_irq),
167                                 v.raw, (unsigned long long)cur_addr, cur_pos,
168                                 fc_pci->last_dma1_cur_pos);
169                 fc_pci->last_irq = jiffies;
170
171                 /* buffer end was reached, restarted from the beginning
172                  * pass the data from last_cur_pos to the buffer end to the demux
173                  */
174                 if (cur_pos < fc_pci->last_dma1_cur_pos) {
175                         deb_irq(" end was reached: passing %d bytes ",(fc_pci->dma[0].size*2 - 1) - fc_pci->last_dma1_cur_pos);
176                         flexcop_pass_dmx_data(fc_pci->fc_dev,
177                                         fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos,
178                                         (fc_pci->dma[0].size*2) - fc_pci->last_dma1_cur_pos);
179                         fc_pci->last_dma1_cur_pos = 0;
180                 }
181
182                 if (cur_pos > fc_pci->last_dma1_cur_pos) {
183                         deb_irq(" passing %d bytes ",cur_pos - fc_pci->last_dma1_cur_pos);
184                         flexcop_pass_dmx_data(fc_pci->fc_dev,
185                                         fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos,
186                                         cur_pos - fc_pci->last_dma1_cur_pos);
187                 }
188                 deb_irq("\n");
189
190                 fc_pci->last_dma1_cur_pos = cur_pos;
191                 fc_pci->count++;
192         } else {
193                 deb_irq("isr for flexcop called, apparently without reason (%08x)\n",v.raw);
194                 ret = IRQ_NONE;
195         }
196
197         spin_unlock_irq(&fc_pci->irq_lock);
198
199         return ret;
200 }
201
202 static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff)
203 {
204         struct flexcop_pci *fc_pci = fc->bus_specific;
205         if (onoff) {
206                 flexcop_dma_config(fc,&fc_pci->dma[0],FC_DMA_1);
207                 flexcop_dma_config(fc,&fc_pci->dma[1],FC_DMA_2);
208
209                 flexcop_dma_config_timer(fc,FC_DMA_1,0);
210
211                 flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1,1);
212                 deb_irq("DMA xfer enabled\n");
213
214                 fc_pci->last_dma1_cur_pos = 0;
215                 flexcop_dma_control_timer_irq(fc,FC_DMA_1,1);
216                 deb_irq("IRQ enabled\n");
217
218 //              fc_pci->active_dma1_addr = 0;
219 //              flexcop_dma_control_size_irq(fc,FC_DMA_1,1);
220
221                 if (irq_chk_intv > 0)
222                         schedule_delayed_work(&fc_pci->irq_check_work,
223                                         msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
224         } else {
225                 if (irq_chk_intv > 0)
226                         cancel_delayed_work(&fc_pci->irq_check_work);
227
228                 flexcop_dma_control_timer_irq(fc,FC_DMA_1,0);
229                 deb_irq("IRQ disabled\n");
230
231 //              flexcop_dma_control_size_irq(fc,FC_DMA_1,0);
232
233                 flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1,0);
234                 deb_irq("DMA xfer disabled\n");
235         }
236
237         return 0;
238 }
239
240 static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci)
241 {
242         int ret;
243         if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[0],FC_DEFAULT_DMA1_BUFSIZE)) != 0)
244                 return ret;
245
246         if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[1],FC_DEFAULT_DMA2_BUFSIZE)) != 0) {
247                 flexcop_dma_free(&fc_pci->dma[0]);
248                 return ret;
249         }
250
251         flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_MEDIA | FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1);
252         flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_CAO   | FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2);
253
254         fc_pci->init_state |= FC_PCI_DMA_INIT;
255
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
297         if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr,
298                                         IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0)
299                 goto err_pci_iounmap;
300
301         spin_lock_init(&fc_pci->irq_lock);
302
303         fc_pci->init_state |= FC_PCI_INIT;
304         return ret;
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         return ret;
314 }
315
316 static void flexcop_pci_exit(struct flexcop_pci *fc_pci)
317 {
318         if (fc_pci->init_state & FC_PCI_INIT) {
319                 free_irq(fc_pci->pdev->irq, fc_pci);
320                 pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
321                 pci_set_drvdata(fc_pci->pdev, NULL);
322                 pci_release_regions(fc_pci->pdev);
323                 pci_disable_device(fc_pci->pdev);
324         }
325         fc_pci->init_state &= ~FC_PCI_INIT;
326 }
327
328
329 static int flexcop_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
330 {
331         struct flexcop_device *fc;
332         struct flexcop_pci *fc_pci;
333         int ret = -ENOMEM;
334
335         if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) {
336                 err("out of memory\n");
337                 return -ENOMEM;
338         }
339
340 /* general flexcop init */
341         fc_pci = fc->bus_specific;
342         fc_pci->fc_dev = fc;
343
344         fc->read_ibi_reg = flexcop_pci_read_ibi_reg;
345         fc->write_ibi_reg = flexcop_pci_write_ibi_reg;
346         fc->i2c_request = flexcop_i2c_request;
347         fc->get_mac_addr = flexcop_eeprom_check_mac_addr;
348
349         fc->stream_control = flexcop_pci_stream_control;
350
351         if (enable_pid_filtering)
352                 info("will use the HW PID filter.");
353         else
354                 info("will pass the complete TS to the demuxer.");
355
356         fc->pid_filtering = enable_pid_filtering;
357         fc->bus_type = FC_PCI;
358
359         fc->dev = &pdev->dev;
360         fc->owner = THIS_MODULE;
361
362 /* bus specific part */
363         fc_pci->pdev = pdev;
364         if ((ret = flexcop_pci_init(fc_pci)) != 0)
365                 goto err_kfree;
366
367 /* init flexcop */
368         if ((ret = flexcop_device_initialize(fc)) != 0)
369                 goto err_pci_exit;
370
371 /* init dma */
372         if ((ret = flexcop_pci_dma_init(fc_pci)) != 0)
373                 goto err_fc_exit;
374
375         INIT_DELAYED_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work);
376
377         return ret;
378
379 err_fc_exit:
380         flexcop_device_exit(fc);
381 err_pci_exit:
382         flexcop_pci_exit(fc_pci);
383 err_kfree:
384         flexcop_device_kfree(fc);
385         return ret;
386 }
387
388 /* in theory every _exit function should be called exactly two times,
389  * here and in the bail-out-part of the _init-function
390  */
391 static void flexcop_pci_remove(struct pci_dev *pdev)
392 {
393         struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
394
395         flexcop_pci_dma_exit(fc_pci);
396         flexcop_device_exit(fc_pci->fc_dev);
397         flexcop_pci_exit(fc_pci);
398         flexcop_device_kfree(fc_pci->fc_dev);
399 }
400
401 static struct pci_device_id flexcop_pci_tbl[] = {
402         { PCI_DEVICE(0x13d0, 0x2103) },
403 /*      { PCI_DEVICE(0x13d0, 0x2200) }, ? */
404         { },
405 };
406
407 MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl);
408
409 static struct pci_driver flexcop_pci_driver = {
410         .name     = "b2c2_flexcop_pci",
411         .id_table = flexcop_pci_tbl,
412         .probe    = flexcop_pci_probe,
413         .remove   = flexcop_pci_remove,
414 };
415
416 static int __init flexcop_pci_module_init(void)
417 {
418         return pci_register_driver(&flexcop_pci_driver);
419 }
420
421 static void __exit flexcop_pci_module_exit(void)
422 {
423         pci_unregister_driver(&flexcop_pci_driver);
424 }
425
426 module_init(flexcop_pci_module_init);
427 module_exit(flexcop_pci_module_exit);
428
429 MODULE_AUTHOR(DRIVER_AUTHOR);
430 MODULE_DESCRIPTION(DRIVER_NAME);
431 MODULE_LICENSE("GPL");