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author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-06-14 16:35:57 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-13 23:30:06 -0300 |
commit | 25aee3debe0464f6c680173041fa3de30ec9ff54 (patch) | |
tree | e2b14f952a0831399f9cbb444cfb9c7980b6485b /drivers/media/pci/b2c2/flexcop-pci.c | |
parent | 786baecfe78f8e25547c628b48a60fc8e5636056 (diff) | |
download | linux-stable-25aee3debe0464f6c680173041fa3de30ec9ff54.tar.gz linux-stable-25aee3debe0464f6c680173041fa3de30ec9ff54.tar.bz2 linux-stable-25aee3debe0464f6c680173041fa3de30ec9ff54.zip |
[media] Rename media/dvb as media/pci
The remaining dvb drivers are pci, so rename them to match the
bus.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/pci/b2c2/flexcop-pci.c')
-rw-r--r-- | drivers/media/pci/b2c2/flexcop-pci.c | 450 |
1 files changed, 450 insertions, 0 deletions
diff --git a/drivers/media/pci/b2c2/flexcop-pci.c b/drivers/media/pci/b2c2/flexcop-pci.c new file mode 100644 index 000000000000..44f8fb5f17ff --- /dev/null +++ b/drivers/media/pci/b2c2/flexcop-pci.c @@ -0,0 +1,450 @@ +/* + * 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"); |