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V4L/DVB (10694): [PATCH] software IRQ watchdog for Flexcop B2C2 DVB PCI cards

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With (some) Technisat cards you cannot run multiple DVB applications
in parallel and switch the channel at the same time.

There seems to be a problem on the interfaces or even inside the flexcop-device
that can't handle interruption on the streaming interface.

This patch adds a watchdog to check whether data is supposed to come in
(streaming PIDs are requested) and if no data is seen within 400ms (default) it
resets the streaming/pid-filtering hardware.

This patch is urgently needed to support the rev 2.8 of the hardware and solves
problem occassionally seen on older hardware.

Signed-off-by: Uwe Bugla <uwe.bugla@gmx.de>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Patrick Boettcher 2009-02-23 06:27:16 -03:00 committed by Mauro Carvalho Chehab
parent 0ad675eb45
commit 382c5546d6
3 changed files with 42 additions and 23 deletions
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1
drivers/media/dvb/b2c2/flexcop-hw-filter.c
View File

@ -192,6 +192,7 @@ int flexcop_pid_feed_control(struct flexcop_device *fc, struct dvb_demux_feed *d
return 0;
}
EXPORT_SYMBOL(flexcop_pid_feed_control);
void flexcop_hw_filter_init(struct flexcop_device *fc)
{

61
drivers/media/dvb/b2c2/flexcop-pci.c
View File

@ -13,9 +13,9 @@ 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;
static int irq_chk_intv = 100;
module_param(irq_chk_intv, int, 0644);
MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ watchdog (currently just debugging).");
MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ streaming watchdog.");
#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
#define dprintk(level,args...) \
@ -34,7 +34,9 @@ MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ watchdog (currently jus
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "set debug level (1=info,2=regs,4=TS,8=irqdma (|-able))." DEBSTATUS);
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 "Technisat/B2C2 FlexCop II/IIb/III Digital TV PCI Driver"
@ -58,6 +60,8 @@ struct flexcop_pci {
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 occured */
int count;
int count_prev;
int stream_problem;
spinlock_t irq_lock;
@ -103,18 +107,32 @@ static void flexcop_pci_irq_check_work(struct work_struct *work)
container_of(work, struct flexcop_pci, irq_check_work.work);
struct flexcop_device *fc = fc_pci->fc_dev;
flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
if (fc->feedcount) {
flexcop_dump_reg(fc_pci->fc_dev,dma1_000,4);
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;
if (v.sram_dest_reg_714.net_ovflow_error)
deb_chk("sram net_ovflow_error\n");
if (v.sram_dest_reg_714.media_ovflow_error)
deb_chk("sram media_ovflow_error\n");
if (v.sram_dest_reg_714.cai_ovflow_error)
deb_chk("sram cai_ovflow_error\n");
if (v.sram_dest_reg_714.cai_ovflow_error)
deb_chk("sram cai_ovflow_error\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));
@ -216,16 +234,12 @@ static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff)
flexcop_dma_control_timer_irq(fc,FC_DMA_1,1);
deb_irq("IRQ enabled\n");
fc_pci->count_prev = fc_pci->count;
// fc_pci->active_dma1_addr = 0;
// flexcop_dma_control_size_irq(fc,FC_DMA_1,1);
if (irq_chk_intv > 0)
schedule_delayed_work(&fc_pci->irq_check_work,
msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
} else {
if (irq_chk_intv > 0)
cancel_delayed_work(&fc_pci->irq_check_work);
flexcop_dma_control_timer_irq(fc,FC_DMA_1,0);
deb_irq("IRQ disabled\n");
@ -299,8 +313,6 @@ static int flexcop_pci_init(struct flexcop_pci *fc_pci)
IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0)
goto err_pci_iounmap;
fc_pci->init_state |= FC_PCI_INIT;
return ret;
@ -375,6 +387,10 @@ static int flexcop_pci_probe(struct pci_dev *pdev, const struct pci_device_id *e
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:
@ -393,6 +409,9 @@ 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);

3
drivers/media/dvb/b2c2/flexcop.c
View File

@ -212,8 +212,7 @@ void flexcop_reset_block_300(struct flexcop_device *fc)
v210.sw_reset_210.Block_reset_enable = 0xb2;
fc->write_ibi_reg(fc,sw_reset_210,v210);
msleep(1);
udelay(1000);
fc->write_ibi_reg(fc,ctrl_208,v208_save);
}