2 * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
4 * flexcop-pci.c - covers the PCI part including DMA transfers.
6 * see flexcop.c for copyright information.
9 #define FC_LOG_PREFIX "flexcop-pci"
10 #include "flexcop-common.h"
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");
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).");
20 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
21 #define dprintk(level,args...) \
22 do { if ((debug & level)) printk(args); } while (0)
25 #define dprintk(level,args...)
26 #define DEBSTATUS " (debugging is not enabled)"
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)
36 module_param(debug, int, 0644);
37 MODULE_PARM_DESC(debug, "set debug level (1=info,2=regs,4=TS,8=irqdma (|-able))." DEBSTATUS);
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>"
46 #define FC_PCI_INIT 0x01
47 #define FC_PCI_DMA_INIT 0x02
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];
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 */
64 unsigned long last_irq;
66 struct work_struct irq_check_work;
68 struct flexcop_device *fc_dev;
71 static int lastwreg,lastwval,lastrreg,lastrval;
73 static flexcop_ibi_value flexcop_pci_read_ibi_reg (struct flexcop_device *fc, flexcop_ibi_register r)
75 struct flexcop_pci *fc_pci = fc->bus_specific;
77 v.raw = readl(fc_pci->io_mem + r);
79 if (lastrreg != r || lastrval != v.raw) {
80 lastrreg = r; lastrval = v.raw;
81 deb_reg("new rd: %3x: %08x\n",r,v.raw);
87 static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register r, flexcop_ibi_value v)
89 struct flexcop_pci *fc_pci = fc->bus_specific;
91 if (lastwreg != r || lastwval != v.raw) {
92 lastwreg = r; lastwval = v.raw;
93 deb_reg("new wr: %3x: %08x\n",r,v.raw);
96 writel(v.raw, fc_pci->io_mem + r);
100 static void flexcop_pci_irq_check_work(void *data)
102 struct flexcop_pci *fc_pci = data;
103 struct flexcop_device *fc = fc_pci->fc_dev;
105 flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
107 flexcop_dump_reg(fc_pci->fc_dev,dma1_000,4);
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");
118 schedule_delayed_work(&fc_pci->irq_check_work,
119 msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
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 */
125 static irqreturn_t flexcop_pci_isr(int irq, void *dev_id, struct pt_regs *regs)
127 struct flexcop_pci *fc_pci = dev_id;
128 struct flexcop_device *fc = fc_pci->fc_dev;
130 irqreturn_t ret = IRQ_HANDLED;
132 spin_lock_irq(&fc_pci->irq_lock);
134 v = fc->read_ibi_reg(fc,irq_20c);
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");
146 if ((fc_pci->count % 1000) == 0)
147 deb_chk("%d valid irq took place so far\n",fc_pci->count);
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);
153 flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr1,fc_pci->dma[0].size / 188);
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;
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;
168 /* buffer end was reached, restarted from the beginning
169 * pass the data from last_cur_pos to the buffer end to the demux
171 if (cur_pos < fc_pci->last_dma1_cur_pos) {
172 deb_irq(" end was reached: passing %d bytes ",(fc_pci->dma[0].size*2 - 1) - fc_pci->last_dma1_cur_pos);
173 flexcop_pass_dmx_data(fc_pci->fc_dev,
174 fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos,
175 (fc_pci->dma[0].size*2) - fc_pci->last_dma1_cur_pos);
176 fc_pci->last_dma1_cur_pos = 0;
179 if (cur_pos > fc_pci->last_dma1_cur_pos) {
180 deb_irq(" passing %d bytes ",cur_pos - fc_pci->last_dma1_cur_pos);
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);
187 fc_pci->last_dma1_cur_pos = cur_pos;
190 deb_irq("isr for flexcop called, apparently without reason (%08x)\n",v.raw);
194 spin_unlock_irq(&fc_pci->irq_lock);
199 static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff)
201 struct flexcop_pci *fc_pci = fc->bus_specific;
203 flexcop_dma_config(fc,&fc_pci->dma[0],FC_DMA_1);
204 flexcop_dma_config(fc,&fc_pci->dma[1],FC_DMA_2);
206 flexcop_dma_config_timer(fc,FC_DMA_1,0);
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");
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");
215 // fc_pci->active_dma1_addr = 0;
216 // flexcop_dma_control_size_irq(fc,FC_DMA_1,1);
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));
222 if (irq_chk_intv > 0)
223 cancel_delayed_work(&fc_pci->irq_check_work);
225 flexcop_dma_control_timer_irq(fc,FC_DMA_1,0);
226 deb_irq("IRQ disabled\n");
228 // flexcop_dma_control_size_irq(fc,FC_DMA_1,0);
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");
237 static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci)
240 if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[0],FC_DEFAULT_DMA1_BUFSIZE)) != 0)
243 if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[1],FC_DEFAULT_DMA2_BUFSIZE)) != 0)
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);
249 fc_pci->init_state |= FC_PCI_DMA_INIT;
253 flexcop_dma_free(&fc_pci->dma[0]);
259 static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci)
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]);
265 fc_pci->init_state &= ~FC_PCI_DMA_INIT;
268 static int flexcop_pci_init(struct flexcop_pci *fc_pci)
273 pci_read_config_byte(fc_pci->pdev, PCI_CLASS_REVISION, &card_rev);
274 info("card revision %x", card_rev);
276 if ((ret = pci_enable_device(fc_pci->pdev)) != 0)
279 pci_set_master(fc_pci->pdev);
281 /* enable interrupts */
282 // pci_write_config_dword(pdev, 0x6c, 0x8000);
284 if ((ret = pci_request_regions(fc_pci->pdev, DRIVER_NAME)) != 0)
285 goto err_pci_disable_device;
287 fc_pci->io_mem = pci_iomap(fc_pci->pdev, 0, 0x800);
289 if (!fc_pci->io_mem) {
290 err("cannot map io memory\n");
292 goto err_pci_release_regions;
295 pci_set_drvdata(fc_pci->pdev, fc_pci);
297 if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr,
298 SA_SHIRQ, DRIVER_NAME, fc_pci)) != 0)
299 goto err_pci_iounmap;
301 spin_lock_init(&fc_pci->irq_lock);
303 fc_pci->init_state |= FC_PCI_INIT;
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);
318 static void flexcop_pci_exit(struct flexcop_pci *fc_pci)
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);
327 fc_pci->init_state &= ~FC_PCI_INIT;
331 static int flexcop_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
333 struct flexcop_device *fc;
334 struct flexcop_pci *fc_pci;
337 if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) {
338 err("out of memory\n");
342 /* general flexcop init */
343 fc_pci = fc->bus_specific;
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;
351 fc->stream_control = flexcop_pci_stream_control;
353 if (enable_pid_filtering)
354 info("will use the HW PID filter.");
356 info("will pass the complete TS to the demuxer.");
358 fc->pid_filtering = enable_pid_filtering;
359 fc->bus_type = FC_PCI;
361 fc->dev = &pdev->dev;
362 fc->owner = THIS_MODULE;
364 /* bus specific part */
366 if ((ret = flexcop_pci_init(fc_pci)) != 0)
370 if ((ret = flexcop_device_initialize(fc)) != 0)
374 if ((ret = flexcop_pci_dma_init(fc_pci)) != 0)
377 INIT_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work, fc_pci);
381 flexcop_device_exit(fc);
383 flexcop_pci_exit(fc_pci);
385 flexcop_device_kfree(fc);
390 /* in theory every _exit function should be called exactly two times,
391 * here and in the bail-out-part of the _init-function
393 static void flexcop_pci_remove(struct pci_dev *pdev)
395 struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
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);
403 static struct pci_device_id flexcop_pci_tbl[] = {
404 { PCI_DEVICE(0x13d0, 0x2103) },
405 /* { PCI_DEVICE(0x13d0, 0x2200) }, ? */
409 MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl);
411 static struct pci_driver flexcop_pci_driver = {
412 .name = "b2c2_flexcop_pci",
413 .id_table = flexcop_pci_tbl,
414 .probe = flexcop_pci_probe,
415 .remove = flexcop_pci_remove,
418 static int __init flexcop_pci_module_init(void)
420 return pci_register_driver(&flexcop_pci_driver);
423 static void __exit flexcop_pci_module_exit(void)
425 pci_unregister_driver(&flexcop_pci_driver);
428 module_init(flexcop_pci_module_init);
429 module_exit(flexcop_pci_module_exit);
431 MODULE_AUTHOR(DRIVER_AUTHOR);
432 MODULE_DESCRIPTION(DRIVER_NAME);
433 MODULE_LICENSE("GPL");