I've tried to make the pci serial controller visable to the 16550
driver by adding:
## FROM 16550A.c
static int rt_16550_interrupt(rtdm_irq_t * irq_context)
{
struct rt_16550_context *ctx;
unsigned long base;
int mode;
int iir;
uint64_t timestamp = rtdm_clock_read();
int rbytes = 0;
int events = 0;
int modem;
int ret = RTDM_IRQ_NONE;
// TEST
struct pci_dev *pdev = NULL; // from
http://bachman.tor.lindesign.se/tmp/driver/sunix/snx_golden.c
pdev = pci_get_device(0, 0, pdev); // from
http://bachman.tor.lindesign.se/tmp/driver/sunix/snx_golden.c
//
ctx = rtdm_irq_get_arg(irq_context, struct rt_16550_context);
base = ctx->base_addr;
mode = rt_16550_io_mode_from_ctx(ctx);
rtdm_lock_get(&ctx->lock);
while (1) {
iir = rt_16550_reg_in(mode, base, IIR) & IIR_MASK;
if (testbits(iir, IIR_PIRQ))
break;
Loading module:
insmod ./xeno_16550A.ko io=0x3f8,0xbc00 irq=4,3 tx_fifo=10,20 start_index=0
running crosslink test:
sandbox:/usr/src/xenomai/examples/rtdm/profiles/serial# ./cross-link
main : write-file opened
main : write-config written
main : read-file opened
main : read-config written
main : write-task created
main : read-task created
main : starting write-task
main : starting read-task
Nr | write->irq | irq->read | write->read |
-----------------------------------------------------------
read_task: error on RTSER_RTIOC_WAIT_EVENT, Connection timed out
read_task: error on RTSER_RTIOC_WAIT_EVENT, Connection timed out
any ideas?
regards /Bachman
On 09/09/2007, Jan Kiszka <[EMAIL PROTECTED]> wrote:
> > Are there any chance that modifications in the source will get it going?
>
> Maybe we are just lacking some pci_enable_device() on the right pci_dev.
> That would mean extending xeno_16550A to deal with PCI devices. Surely
> feasible, but it takes time and hardware to test - I'm lacking both.
>
> Are you willing to play a bit with it? Then, as a prototype, you could
> pick up the lookup and enabling code from the snx driver and hack it
> into xeno_16550A. If that works, we could discuss how to establish
> something generic for PCI-based adapters.
>
> Note that I haven't read through that driver in details. There is a
> slight risk that some more bits are different. On the other hand, the
> 16650 UART that seems to be on that card is advertised as
> 16550-compatible, thus it /should/ work...
>
> Jan
>
>
>
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