AR6000 netif_queue_stop non stop, Bug?

Ivan Petrov ivan_p at hotbox.ru
Sun Mar 29 13:18:02 CEST 2009


Dear Dongas,

> It's very kind of you.
> Really appreciate for you reply. :)
>
> 2009/3/28 Ivan Petrov <ivan_p at hotbox.ru>:
>>> Dear Ivan,
>>>
>>> Can you help tell that which SDIO WiFi card are you using?
>>> Are you using Openmoko's ar6000 driver in Andy-tracking branch in kernel
>>> 2.6.29?
>>
>> Card - Silex SX-SDAWG. Drivers based on OpenMokko branch, but with small
>> patches.
>
> I'm also using Silex SX-SDWAG with driver based on OpenMoko
> Andy-tracking branch in kernel 2.6.29.
> But i havn't got any small patches.

> Does it mean that the ar6000 driver from Openmoko can not work for
> SX-SDWAG by default, need some extra patches?
No no, SX-SDWAG work with AR6000 Openmoko dirvers,
1) driver have GPIO ussage on HIF layer, but on AT91 it not work.
2) I have myself HIF levele module, and now I try merge it with OpenMoko driver. I send old module to Werner as sample, posible he 
can find inside any useful part.
3) AT91 have small bugs...

> Can you help tell me that where can i get these special patches?
1, 2 - I attach full experemental snapshot (diff with orig kernel), apply it to clean kernel, driver have different path with 
OpenMoko.
3 - about bugs...

AT91SAM9260 not correctly work with SDIO_IRQ in 4wire mode.
For solve:
1. Turn off 4wire mode in EK BOARD file, or try switch it on HIF layer (atm I not arrive)

+/*
+ * MCI (SD/MMC)
+ */
+static struct at91_mmc_data __initdata board_mmc_data = {
+ .slot_b  = 0, // port A on my board
+ .wire4  = 0, // wire1 mode
+// .det_pin = ... not connected
+// .wp_pin  = ... not connected
+// .vcc_pin = ... not connected
+};

2. Disable SDIO_IRQ in host controller, and increase jifies HZ form 100 to 1000 in Linux config

==================
CONFIG_AT91_TIMER_HZ=1000

==================
diff -urN linux-2.6.28.8.orig/drivers/mmc/host/at91_mci.c
linux-2.6.28.8/drivers/mmc/host/at91_mci.c
--- linux-2.6.28.8.orig/drivers/mmc/host/at91_mci.c 2009-03-17
03:50:03.000000000 +0300
+++ linux-2.6.28.8/drivers/mmc/host/at91_mci.c 2009-03-22 01:08:53.000000000
+0300
@@ -1007,7 +1007,7 @@
  mmc->f_min = 375000;
  mmc->f_max = 25000000;
  mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
- mmc->caps = MMC_CAP_SDIO_IRQ;
+ mmc->caps = 0; // MMC_CAP_SDIO_IRQ;

  mmc->max_blk_size = 4095;
  mmc->max_blk_count = mmc->max_req_size;
==================

And more... Please insert card to slot before board power ON. Hotplug i not test, but after reset (not power off/on) my card not 
work.

> In addition , which firmware are your card based?
> My card is based on firmware 2.0 since Werner told me that the ar6000
> driver of Openmoko is only for firmware 2.0 card.
equally.

> My board is based on ARM926 core.
ARM926 or AT91SAM9260? however it is not important.

--
Regards, Ivan 




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