On Fri, Jan 15, 2016 at 1:44 PM, benoit <[email protected]> wrote: > Hi, > > As explained in my post, I am not using the UART located in the Baytrail > SOC. > I used an SIO for serial line connected to the LPC bus. > So to have the IRQs of these serial lines, I obviuosly need to SERIRQ. > The IRQEN is only for the COM1 located in the SOC. >
I missed that part about the SIO. In the past on a bay trail project we couldn't use SERIRQ because the LPC device and bay trail didn't support the same SERIRQ frame sequence -- thus badness all around. Have scoped the SERIRQ lines at all? Maybe the LPC device isn't asserting? Or maybe SERIRQ isn't running at all. > Thanks for your help > Benoit > > On 14/01/2016 23:09, Aaron Durbin wrote: >> On Tue, Jan 12, 2016 at 2:32 PM, benoit <[email protected]> wrote: >>> Hi all, >>> >>> I am currently running coreboot + fsp on a E3837 cpu based platform. >>> My platform has serial line in a LPC device. >>> Firstly, I activated the SERIRQ in continous mode. >> >> SERIRQ has nothing to do w/ COM1. SERIRQ is pulled in on LPC. >> >>> Nevertheless under operating system, the IRQ4 for COM1 is not available. >> >> IRQEN (IRQE)—Offset 88h bit 4 indicates UART IRQ4 Enable. The >> datasheet says RO, but you could double check that it's RW. That sit >> behind the ILB_BASE_ADDRESS. >> >> In the datasheet it's section 34.3.53. >> http://www.intel.com/content/www/us/en/embedded/products/bay-trail/atom-e3800-family-datasheet.html >> >>> >>> I checked out the file src/mainboard/intel/bayleybay_fsp/irqtable.h >>> And I saw that for the LPC interface : >>> >>> PCI_DEV_PIRQ_ROUTE(PCU_DEV, H, G, B, C) >>> ... >>> #define PIRQ_PIC_ROUTES \ >>> PIRQ_PIC(A, 4), \ >>> PIRQ_PIC(B, 5), \ >>> PIRQ_PIC(C, 7), \ >>> PIRQ_PIC(D, 10), \ >>> PIRQ_PIC(E, 11), \ >>> PIRQ_PIC(F, 12), \ >>> PIRQ_PIC(G, 14), \ >>> PIRQ_PIC(H, 15) >>> >>> I know that this configuration is available from the ILB_BASE_ADDRESS >>> (0xfed08000). >>> But I don't really understand, how to route the IRQ4 from LPC dev. >>> >>> Is someone can explain to me how to do it properly? >>> >>> Many thanks in advance >>> Benoit >>> >>> -- >>> coreboot mailing list: [email protected] >>> http://www.coreboot.org/mailman/listinfo/coreboot >> -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
