My system hangs reproducibly and completely on "modprobe bttv", there
is no error message.
Here is the trivial patch for a printk syntax error in bttv-driver.c
(version 0.8.45) line #3271
printk(KERN_INFO "bttv%d: Bt%d (rev %d) at %02x:%02x.%x, ",
bttv_num,btv->id, btv->revision, dev->bus->number,
PCI_SLOT(dev->devfn),PCI_FUNC(dev->devfn));
"KERN_INFO" should not be there, it's a printk, not a dprintk,
the next line is a printk without it, and that line is a continuation of
the first.
Now that KERN_INFO is gone, I can see:
bttv0: Bt878 (rev 17) @ 00:09.0 irq: 7, latency: 32 mmio: 0xcd000000
Used print statements every couple of lines to trace the code
(patch at the end, for illustration purposes) it hangs at
"btwrite(val, BT848_E_SCLOOP);" in init_bt848.
If I comment out "btwrite(val, BT848_E_SCLOOP);" it just hangs on the next
line (O_SCLOOP), or the line after that if I comment that one out.
It is easy to do testing, I can print whatever you want, and send it to
someone who knows what it means, but I am no kernel hacker.
The CVS repository looks very old, I do not see any newer source code
anywhere other than 0.8.45. Is there a place I should look?
What should I be looking at?
Where is there documentation about how btwrite works, what are
the magic constant codes used in btwrite, where is the docs on them?
any help appreciated.
Random potentially useful information:
-- the card id is 11002 (ATI TV Wonder... which is what it said
on the retail box)
chips on card: BT878A, MSP3445G, PHILIPPS NTSC Tuner...
(bttv-cards.c lists the correct id, but a different
PAL tuner, I am guessing it is PHILIPS tuner because it says "PHILIPS"
on it)
grumpy% lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT82C693A/694x [Apollo
PRO133x] (rev c2)
00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo
MVP3/Pro133x AGP]
00:04.0 ISA bridge: VIA Technologies, Inc. VT82C596 ISA [Mobile South]
(rev 12)
00:04.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06)
00:04.2 USB Controller: VIA Technologies, Inc. USB (rev 08)
00:04.3 Host bridge: VIA Technologies, Inc. VT82C596 Power Management
(rev 20)
00:09.0 Multimedia video controller: Brooktree Corporation Bt878 Video
Capture (rev 11)
00:09.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture
(rev 11)
00:0b.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 08)
00:0b.1 Input device controller: Creative Labs SB Live! MIDI/Game Port
(rev 08)
00:0e.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone]
(rev 30)
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP
(rev 04)
grumpy%
grumpy% cat /proc/interrupts
CPU0
0: 66430 XT-PIC timer
1: 1402 XT-PIC keyboard
2: 0 XT-PIC cascade
5: 921 XT-PIC eth0
12: 13992 XT-PIC PS/2 Mouse
14: 13420 XT-PIC ide0
15: 27 XT-PIC ide1
NMI: 0
ERR: 0
grumpy%
*** bttv-0.8.45-/bttv-driver.c Tue Aug 13 04:51:01 2002
--- bttv-0.8.45/bttv-driver.c Sun Sep 15 21:39:12 2002
***************
*** 881,891 ****
{
int val;
btwrite(0, BT848_SRESET);
! btwrite(0x00, BT848_CAP_CTL);
btwrite(BT848_COLOR_CTL_GAMMA, BT848_COLOR_CTL);
btwrite(BT848_IFORM_XTAUTO | BT848_IFORM_AUTO, BT848_IFORM);
/* set planar and packed mode trigger points and */
/* set rising edge of inverted GPINTR pin as irq trigger */
btwrite(BT848_GPIO_DMA_CTL_PKTP_32|
--- 881,907 ----
{
int val;
+ printk("bttv: Peter! in init_bt848 - 1 about to
btwrite(0,BT848_reset)!\n");
+
btwrite(0, BT848_SRESET);
!
! printk("bttv: Peter! in init_bt848 - 2
btwrite(0x00,BT848_CAP_CTL)!\n");
!
! btwrite(0x00, BT848_CAP_CTL);
!
! printk("bttv: Peter! in init_bt848 - 3 !\n");
!
!
btwrite(BT848_COLOR_CTL_GAMMA, BT848_COLOR_CTL);
+
+ printk("bttv: Peter! in init_bt848 - 4 !\n");
+
btwrite(BT848_IFORM_XTAUTO | BT848_IFORM_AUTO, BT848_IFORM);
+ printk("bttv: Peter! in init_bt848 - 5 !\n");
+
+
+
/* set planar and packed mode trigger points and */
/* set rising edge of inverted GPINTR pin as irq trigger */
btwrite(BT848_GPIO_DMA_CTL_PKTP_32|
***************
*** 895,909 ****
BT848_GPIO_DMA_CTL_GPINTI,
BT848_GPIO_DMA_CTL);
val = btv->opt_chroma_agc ? BT848_SCLOOP_CAGC : 0;
- btwrite(val, BT848_E_SCLOOP);
- btwrite(val, BT848_O_SCLOOP);
btwrite(0x20, BT848_E_VSCALE_HI);
btwrite(0x20, BT848_O_VSCALE_HI);
btwrite(BT848_ADC_RESERVED | (btv->opt_adc_crush ?
BT848_ADC_CRUSH : 0),
BT848_ADC);
if (btv->opt_lumafilter) {
btwrite(0, BT848_E_CONTROL);
btwrite(0, BT848_O_CONTROL);
--- 911,937 ----
BT848_GPIO_DMA_CTL_GPINTI,
BT848_GPIO_DMA_CTL);
+ printk("bttv: Peter! in init_bt848 - 6
btv->bt848_mmio=%08lx!\n", (unsigned long)(btv->bt848
_mmio));
+
val = btv->opt_chroma_agc ? BT848_SCLOOP_CAGC : 0;
+ printk("bttv: Peter! in init_bt848 - 6.1 val=%d, skipping
btwrite(val, BT848_E_SCLOOP);!\n",
val);
+ btwrite(val, BT848_E_SCLOOP);
+ printk("bttv: Peter! in init_bt848 - 6.2 val=%d, about to
btwrite(val, BT848_O_SCLOOP);!\n",
val);
+ btwrite(val, BT848_O_SCLOOP);
+
+
+ printk("bttv: Peter! in init_bt848 - 7 !\n");
+
+ /* Peter! the two below hang as well */
btwrite(0x20, BT848_E_VSCALE_HI);
btwrite(0x20, BT848_O_VSCALE_HI);
+
btwrite(BT848_ADC_RESERVED | (btv->opt_adc_crush ?
BT848_ADC_CRUSH : 0),
BT848_ADC);
+ printk("bttv: Peter! in init_bt848 - 8 !\n");
+
if (btv->opt_lumafilter) {
btwrite(0, BT848_E_CONTROL);
btwrite(0, BT848_O_CONTROL);
***************
*** 911,916 ****
--- 939,945 ----
btwrite(BT848_CONTROL_LDEC, BT848_E_CONTROL);
btwrite(BT848_CONTROL_LDEC, BT848_O_CONTROL);
}
+ printk("bttv: Peter! in init_bt848 - 9 !\n");
}
extern void bttv_reinit_bt848(struct bttv *btv)
***************
*** 3059,3071 ****
}
if (-1 != latency) {
! printk(KERN_INFO "bttv%d: setting pci latency timer to
%d\n",
bttv_num,latency);
pci_write_config_byte(dev, PCI_LATENCY_TIMER, latency);
}
pci_read_config_byte(dev, PCI_CLASS_REVISION, &btv->revision);
pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
! printk(KERN_INFO "bttv%d: Bt%d (rev %d) at %02x:%02x.%x, ",
bttv_num,btv->id, btv->revision, dev->bus->number,
PCI_SLOT(dev->devfn),PCI_FUNC(dev->devfn));
printk("irq: %d, latency: %d, mmio: 0x%lx\n",
--- 3088,3100 ----
}
if (-1 != latency) {
! dprintk(KERN_INFO "bttv%d: setting pci latency timer to
%d\n",
bttv_num,latency);
pci_write_config_byte(dev, PCI_LATENCY_TIMER, latency);
}
pci_read_config_byte(dev, PCI_CLASS_REVISION, &btv->revision);
pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
! printk("bttv%d: Bt%d (rev %d) at %02x:%02x.%x, ",
bttv_num,btv->id, btv->revision, dev->bus->number,
PCI_SLOT(dev->devfn),PCI_FUNC(dev->devfn));
printk("irq: %d, latency: %d, mmio: 0x%lx\n",
***************
*** 3081,3086 ****
--- 3110,3118 ----
/* identify card */
bttv_idcard(btv);
+ printk("bttvnum=%d, nr=%d, cardid=%0lx name=+%s+",
+ bttv_num, btv->nr, btv->cardid, btv->name); /* Peter */
+
/* disable irqs, register irq handler */
btwrite(0, BT848_INT_MASK);
result = request_irq(btv->dev->irq, bttv_irq,
***************
*** 3090,3095 ****
--- 3122,3128 ----
bttv_num,btv->dev->irq);
goto fail1;
}
+ printk(KERN_ERR "bttv%d: got IRQ %d\n",
bttv_num,btv->dev->irq); /* Peter */
if (0 != bttv_handle_chipset(btv)) {
result = -EIO;
***************
*** 3116,3130 ****
--- 3149,3175 ----
if (bttv_gpio)
bttv_gpio_tracking(btv,"pre-init");
+ printk("bttv: Peter! about to run init main functions!\n");
+
bttv_risc_init_main(btv);
+
+ /* Peter! it hangs after here! */
+
init_bt848(btv);
+ /* Peter! it hangs before here! */
+ printk("bttv: Peter! returned from init_bt848 - 10 !\n");
+ goto fail1; /* Peter! you sly dog... */
+
/* gpio */
+ /* Peter!
btwrite(0x00, BT848_GPIO_REG_INP);
btwrite(0x00, BT848_GPIO_OUT_EN);
+ */
if (bttv_gpio)
bttv_gpio_tracking(btv,"init");
+ printk("bttv: Peter! returned from init_bt848 - 11 !\n");
/* interrupt */
btwrite(0xfffffUL, BT848_INT_STAT);
btwrite((btv->triton1) |
***************
*** 3135,3146 ****
--- 3180,3195 ----
BT848_INT_FMTCHG|BT848_INT_HLOCK,
BT848_INT_MASK);
+ printk("bttv: Peter! returned from init_bt848 - 12 !\n");
+ /* Peter! Definitely hung by here.... */
/* needs to be done before i2c is registered */
bttv_init_card1(btv);
+ printk("bttv: Peter! returned from init_bt848 - 13 !\n");
/* register i2c */
init_bttv_i2c(btv);
+ printk("bttv: Peter! returned from init_bt848 - 14 !\n");
/* some card-specific stuff (needs working i2c) */
bttv_init_card2(btv);
