On Wednesday 22 September 2010 14:01:46 Alex Mihaylov wrote: > 2010/9/22 Christian Lamparter <chunkeey@xxxxxxxxxxxxxx>: > > their GPL driver looks funny. (Max, it's really worth a look) > > anyway found this: > > /* > > Sequence taken from STLC4560 DataSheet > > This sequence can be run with the maximum SPI clock frequency (that is, 48 MHz). > > 1. Power up. > > 2. Wait 240 ms. > > 3. Halt processor (EHostDeviceCntrl2 = KSetHostOverride | KSetHostCPUEn=0). > > 4. Wait 1 us. > > 5. Enable DMA TX (EHostDmaTxCntrl, KDmaTxCntrlEnable). > > 6. Write DMA TX length (EHostDmaTxLength). > > 7. Write DMA TX base (EHostDmaTxBase1). > > 8. Wait 1 ìs. > > 9. Write firmware image (EHostDmaData). > > 10. RAM reset (EHostDeviceCntrl2 = KSetHostOverride | KSetHostReset | KSetRamBoot). > > 11. Wait 40 ms. > > 12. RAM boot (EHostDeviceCntrl2 = KSetHostOverride | KSetRamBoot), > > 13. Enable host interrupts (EHostIntEnable1 = KIrqReady | KIrqWrReady | KHwUpdate | KSwUpdate). > > 14. Wait for the READY interrupt (100 ms timeout). > > 15. Acknowledge the READY interrupt. > > 16. Issue the SLEEP interrupt. > > */ > > > > maybe it helps > > Yes. I see this code. But in p54spi.c I found sequence from 1 to 13. > Sagrad make this steps with disabler interrupt from card (poll chip > register). But p54spi wait hardware READY IRQ from chip in 14 (and in > IRQ routine send acknowledge from 15). why polling? They even say "14. Wait for the READY interrupt". Have you checked if the module parameters for power + irq are correct? static int p54spi_gpio_power = 97; MODULE_PARM_DESC(p54spi_gpio_power, "gpio number for power line"); static int p54spi_gpio_irq = 87; MODULE_PARM_DESC(p54spi_gpio_irq, "gpio number for irq line"); Also, on power_on the driver currently waits just 10 and not 240 ms, maybe this could just be the problem... -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
