/* * Linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III * flexcop-pci.c - covers the PCI part including DMA transfers * see flexcop.c for copyright information */ #define FC_LOG_PREFIX "flexcop-pci" #include "flexcop-common.h" static int enable_pid_filtering = 1; module_param(enable_pid_filtering, int, 0444); MODULE_PARM_DESC(enable_pid_filtering, "enable hardware pid filtering: supported values: 0 (fullts), 1"); static int irq_chk_intv = 100; module_param(irq_chk_intv, int, 0644); MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ streaming watchdog."); #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG #define dprintk(level,args...) \ do { if ((debug & level)) printk(args); } while (0) #define DEBSTATUS "" #else #define dprintk(level,args...) #define DEBSTATUS " (debugging is not enabled)" #endif #define deb_info(args...) dprintk(0x01, args) #define deb_reg(args...) dprintk(0x02, args) #define deb_ts(args...) dprintk(0x04, args) #define deb_irq(args...) dprintk(0x08, args) #define deb_chk(args...) dprintk(0x10, args) static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "set debug level (1=info,2=regs,4=TS,8=irqdma,16=check (|-able))." DEBSTATUS); #define DRIVER_VERSION "0.1" #define DRIVER_NAME "flexcop-pci" #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>" struct flexcop_pci { struct pci_dev *pdev; #define FC_PCI_INIT 0x01 #define FC_PCI_DMA_INIT 0x02 int init_state; void __iomem *io_mem; u32 irq; /* buffersize (at least for DMA1, need to be % 188 == 0, * this logic is required */ #define FC_DEFAULT_DMA1_BUFSIZE (1280 * 188) #define FC_DEFAULT_DMA2_BUFSIZE (10 * 188) struct flexcop_dma dma[2]; int active_dma1_addr; /* 0 = addr0 of dma1; 1 = addr1 of dma1 */ u32 last_dma1_cur_pos; /* position of the pointer last time the timer/packet irq occurred */ int count; int count_prev; int stream_problem; spinlock_t irq_lock; unsigned long last_irq; struct delayed_work irq_check_work; struct flexcop_device *fc_dev; }; static int lastwreg, lastwval, lastrreg, lastrval; static flexcop_ibi_value flexcop_pci_read_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register r) { struct flexcop_pci *fc_pci = fc->bus_specific; flexcop_ibi_value v; v.raw = readl(fc_pci->io_mem + r); if (lastrreg != r || lastrval != v.raw) { lastrreg = r; lastrval = v.raw; deb_reg("new rd: %3x: %08x\n", r, v.raw); } return v; } static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register r, flexcop_ibi_value v) { struct flexcop_pci *fc_pci = fc->bus_specific; if (lastwreg != r || lastwval != v.raw) { lastwreg = r; lastwval = v.raw; deb_reg("new wr: %3x: %08x\n", r, v.raw); } writel(v.raw, fc_pci->io_mem + r); return 0; } static void flexcop_pci_irq_check_work(struct work_struct *work) { struct flexcop_pci *fc_pci = container_of(work, struct flexcop_pci, irq_check_work.work); struct flexcop_device *fc = fc_pci->fc_dev; if (fc->feedcount) { if (fc_pci->count == fc_pci->count_prev) { deb_chk("no IRQ since the last check\n"); if (fc_pci->stream_problem++ == 3) { struct dvb_demux_feed *feed; deb_info("flexcop-pci: stream problem, resetting pid filter\n"); spin_lock_irq(&fc->demux.lock); list_for_each_entry(feed, &fc->demux.feed_list, list_head) { flexcop_pid_feed_control(fc, feed, 0); } list_for_each_entry(feed, &fc->demux.feed_list, list_head) { flexcop_pid_feed_control(fc, feed, 1); } spin_unlock_irq(&fc->demux.lock); fc_pci->stream_problem = 0; } } else { fc_pci->stream_problem = 0; fc_pci->count_prev = fc_pci->count; } } schedule_delayed_work(&fc_pci->irq_check_work, msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv)); } /* When PID filtering is turned on, we use the timer IRQ, because small amounts * of data need to be passed to the user space instantly as well. When PID * filtering is turned off, we use the page-change-IRQ */ static irqreturn_t flexcop_pci_isr(int irq, void *dev_id) { struct flexcop_pci *fc_pci = dev_id; struct flexcop_device *fc = fc_pci->fc_dev; unsigned long flags; flexcop_ibi_value v; irqreturn_t ret = IRQ_HANDLED; spin_lock_irqsave(&fc_pci->irq_lock, flags); v = fc->read_ibi_reg(fc, irq_20c); /* errors */ if (v.irq_20c.Data_receiver_error) deb_chk("data receiver error\n"); if (v.irq_20c.Continuity_error_flag) deb_chk("Contunuity error flag is set\n"); if (v.irq_20c.LLC_SNAP_FLAG_set) deb_chk("LLC_SNAP_FLAG_set is set\n"); if (v.irq_20c.Transport_Error) deb_chk("Transport error\n"); if ((fc_pci->count % 1000) == 0) deb_chk("%d valid irq took place so far\n", fc_pci->count); if (v.irq_20c.DMA1_IRQ_Status == 1) { if (fc_pci->active_dma1_addr == 0) flexcop_pass_dmx_packets(fc_pci->fc_dev, fc_pci->dma[0].cpu_addr0, fc_pci->dma[0].size / 188); else flexcop_pass_dmx_packets(fc_pci->fc_dev, fc_pci->dma[0].cpu_addr1, fc_pci->dma[0].size / 188); deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr); fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr; /* for the timer IRQ we only can use buffer dmx feeding, because we don't have * complete TS packets when reading from the DMA memory */ } else if (v.irq_20c.DMA1_Timer_Status == 1) { dma_addr_t cur_addr = fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2; u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0; deb_irq("%u irq: %08x cur_addr: %llx: cur_pos: %08x, " "last_cur_pos: %08x ", jiffies_to_usecs(jiffies - fc_pci->last_irq), v.raw, (unsigned long long)cur_addr, cur_pos, fc_pci->last_dma1_cur_pos); fc_pci->last_irq = jiffies; /* buffer end was reached, restarted from the beginning * pass the data from last_cur_pos to the buffer end to the demux */ if (cur_pos < fc_pci->last_dma1_cur_pos) { deb_irq(" end was reached: passing %d bytes ", (fc_pci->dma[0].size*2 - 1) - fc_pci->last_dma1_cur_pos); flexcop_pass_dmx_data(fc_pci->fc_dev, fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos, (fc_pci->dma[0].size*2) - fc_pci->last_dma1_cur_pos); fc_pci->last_dma1_cur_pos = 0; } if (cur_pos > fc_pci->last_dma1_cur_pos) { deb_irq(" passing %d bytes ", cur_pos - fc_pci->last_dma1_cur_pos); flexcop_pass_dmx_data(fc_pci->fc_dev, fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos, cur_pos - fc_pci->last_dma1_cur_pos); } deb_irq("\n"); fc_pci->last_dma1_cur_pos = cur_pos; fc_pci->count++; } else { deb_irq("isr for flexcop called, " "apparently without reason (%08x)\n", v.raw); ret = IRQ_NONE; } spin_unlock_irqrestore(&fc_pci->irq_lock, flags); return ret; } static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff) { struct flexcop_pci *fc_pci = fc->bus_specific; if (onoff) { flexcop_dma_config(fc, &fc_pci->dma[0], FC_DMA_1); flexcop_dma_config(fc, &fc_pci->dma[1], FC_DMA_2); flexcop_dma_config_timer(fc, FC_DMA_1, 0); flexcop_dma_xfer_control(fc, FC_DMA_1, FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1, 1); deb_irq("DMA xfer enabled\n"); fc_pci->last_dma1_cur_pos = 0; flexcop_dma_control_timer_irq(fc, FC_DMA_1, 1); deb_irq("IRQ enabled\n"); fc_pci->count_prev = fc_pci->count; } else { flexcop_dma_control_timer_irq(fc, FC_DMA_1, 0); deb_irq("IRQ disabled\n"); flexcop_dma_xfer_control(fc, FC_DMA_1, FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1, 0); deb_irq("DMA xfer disabled\n"); } return 0; } static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci) { int ret; ret = flexcop_dma_allocate(fc_pci->pdev, &fc_pci->dma[0], FC_DEFAULT_DMA1_BUFSIZE); if (ret != 0) return ret; ret = flexcop_dma_allocate(fc_pci->pdev, &fc_pci->dma[1], FC_DEFAULT_DMA2_BUFSIZE); if (ret != 0) { flexcop_dma_free(&fc_pci->dma[0]); return ret; } flexcop_sram_set_dest(fc_pci->fc_dev, FC_SRAM_DEST_MEDIA | FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1); flexcop_sram_set_dest(fc_pci->fc_dev, FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2); fc_pci->init_state |= FC_PCI_DMA_INIT; return ret; } static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci) { if (fc_pci->init_state & FC_PCI_DMA_INIT) { flexcop_dma_free(&fc_pci->dma[0]); flexcop_dma_free(&fc_pci->dma[1]); } fc_pci->init_state &= ~FC_PCI_DMA_INIT; } static int flexcop_pci_init(struct flexcop_pci *fc_pci) { int ret; info("card revision %x", fc_pci->pdev->revision); if ((ret = pci_enable_device(fc_pci->pdev)) != 0) return ret; pci_set_master(fc_pci->pdev); if ((ret = pci_request_regions(fc_pci->pdev, DRIVER_NAME)) != 0) goto err_pci_disable_device; fc_pci->io_mem = pci_iomap(fc_pci->pdev, 0, 0x800); if (!fc_pci->io_mem) { err("cannot map io memory\n"); ret = -EIO; goto err_pci_release_regions; } pci_set_drvdata(fc_pci->pdev, fc_pci); spin_lock_init(&fc_pci->irq_lock); if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr, IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0) goto err_pci_iounmap; fc_pci->init_state |= FC_PCI_INIT; return ret; err_pci_iounmap: pci_iounmap(fc_pci->pdev, fc_pci->io_mem); pci_set_drvdata(fc_pci->pdev, NULL); err_pci_release_regions: pci_release_regions(fc_pci->pdev); err_pci_disable_device: pci_disable_device(fc_pci->pdev); return ret; } static void flexcop_pci_exit(struct flexcop_pci *fc_pci) { if (fc_pci->init_state & FC_PCI_INIT) { free_irq(fc_pci->pdev->irq, fc_pci); pci_iounmap(fc_pci->pdev, fc_pci->io_mem); pci_set_drvdata(fc_pci->pdev, NULL); pci_release_regions(fc_pci->pdev); pci_disable_device(fc_pci->pdev); } fc_pci->init_state &= ~FC_PCI_INIT; } static int flexcop_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct flexcop_device *fc; struct flexcop_pci *fc_pci; int ret = -ENOMEM; if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) { err("out of memory\n"); return -ENOMEM; } /* general flexcop init */ fc_pci = fc->bus_specific; fc_pci->fc_dev = fc; fc->read_ibi_reg = flexcop_pci_read_ibi_reg; fc->write_ibi_reg = flexcop_pci_write_ibi_reg; fc->i2c_request = flexcop_i2c_request; fc->get_mac_addr = flexcop_eeprom_check_mac_addr; fc->stream_control = flexcop_pci_stream_control; if (enable_pid_filtering) info("will use the HW PID filter."); else info("will pass the complete TS to the demuxer."); fc->pid_filtering = enable_pid_filtering; fc->bus_type = FC_PCI; fc->dev = &pdev->dev; fc->owner = THIS_MODULE; /* bus specific part */ fc_pci->pdev = pdev; if ((ret = flexcop_pci_init(fc_pci)) != 0) goto err_kfree; /* init flexcop */ if ((ret = flexcop_device_initialize(fc)) != 0) goto err_pci_exit; /* init dma */ if ((ret = flexcop_pci_dma_init(fc_pci)) != 0) goto err_fc_exit; INIT_DELAYED_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work); if (irq_chk_intv > 0) schedule_delayed_work(&fc_pci->irq_check_work, msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv)); return ret; err_fc_exit: flexcop_device_exit(fc); err_pci_exit: flexcop_pci_exit(fc_pci); err_kfree: flexcop_device_kfree(fc); return ret; } /* in theory every _exit function should be called exactly two times, * here and in the bail-out-part of the _init-function */ static void flexcop_pci_remove(struct pci_dev *pdev) { struct flexcop_pci *fc_pci = pci_get_drvdata(pdev); if (irq_chk_intv > 0) cancel_delayed_work(&fc_pci->irq_check_work); flexcop_pci_dma_exit(fc_pci); flexcop_device_exit(fc_pci->fc_dev); flexcop_pci_exit(fc_pci); flexcop_device_kfree(fc_pci->fc_dev); } static struct pci_device_id flexcop_pci_tbl[] = { { PCI_DEVICE(0x13d0, 0x2103) }, { }, }; MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl); static struct pci_driver flexcop_pci_driver = { .name = "b2c2_flexcop_pci", .id_table = flexcop_pci_tbl, .probe = flexcop_pci_probe, .remove = flexcop_pci_remove, }; static int __init flexcop_pci_module_init(void) { return pci_register_driver(&flexcop_pci_driver); } static void __exit flexcop_pci_module_exit(void) { pci_unregister_driver(&flexcop_pci_driver); } module_init(flexcop_pci_module_init); module_exit(flexcop_pci_module_exit); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_NAME); MODULE_LICENSE("GPL");