Questions on libertas driver

[Cyril HAENEL]

Holger, you are right !

My board config file was misconfigured and the pcmcia IRQ was not routed 
on the good pin...

Ok, now the driver works again but I need to add the last patch for the 
unaligned datas because I have kernel panic. After that I will be able 
to try to find the "Tx timeout" problem.

Regards,
Cyril

Holger Schurig a écrit :

>>libertas DNLD_CMD: 03 00 2e 00 02 00 00 00 00 00 00 00 00 00 00 00 
>>libertas DNLD_CMD: ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00
>>libertas DNLD_CMD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>##inw 00000020<0005
>>##outw 00000018>002e
>>##outsw 0000001a>(0x17 words)
>>##outw 00000000>0004
>>##outw 00000002>0004
>>root:~> libertas: Command 3 timed out
>>libertas: requeueing command 3 due to timeout (#1)
>>    
>>
>
>Your card doesn't generate an interrupt.
>
>After the last "##outw 00000002>0004" the driver is finished so far.
>Then the driver waits until the card interrupts back -- or the driver
>moans about a time out.
>
>Here's a relevant from this driver, talking to my CF card:
>
>libertas enter: lbs_submit_command():1166
>libertas cmd: DNLD_CMD: command 0x0003, seq 2, size 46, jiffies 578632
>libertas DNLD_CMD: 03 00 2e 00 02 00 00 00 00 00 00 00 00 00 00 00
>libertas DNLD_CMD: ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00
>libertas DNLD_CMD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>libertas_cs enter: if_cs_host_to_card(type 1, bytes 46):622
>libertas_cs enter: if_cs_send_cmd():290
>##inw 00000020<0005
>
>This are bits IF_CS_C_S_TX_DNLD_RDY and IF_CS_C_S_CMD_DNLD_RDY. So we can
>download a command. Which we do. First the length, then the data:
>
>##outw 00000018>002e
>##outsw 0000001a>(0x17 words)
>
>0x17 * 2 = 0x2e, so this seems all fine. So we poke
>IF_CS_H_STATUS_DNLD_OVER into the host status register
>
>##outw 00000000>0004
>
>and create an interrupt on on the embedded ARM processor:
>
>##outw 00000002>0004
>libertas_cs leave: if_cs_send_cmd():321, ret 0
>libertas_cs leave: if_cs_host_to_card():638, ret 0
>libertas leave: lbs_submit_command():1199
>libertas leave: lbs_execute_next_command():1879
>libertas thread: main-thread 111: intcounter=0 currenttxskb=00000000 dnld_sent=2
>libertas thread: main-thread sleeping... Conn=1 IntC=0 PS_mode=0 PS_State=0
>
>... and then we have to wait until we get an interrupt. Here it comes:
>
>libertas_cs enter (INT): if_cs_interrupt():249
>##inw 00000022<0008
>##outw 00000022>0008
>libertas enter (INT): lbs_interrupt():1464
>libertas thread (INT): lbs_interrupt: intcounter=0
>libertas leave (INT): lbs_interrupt():1472
>libertas thread: main-thread 222 (waking up): intcounter=1 currenttxskb=00000000 dnld_sent=2
>libertas thread: main-thread 333: intcounter=1 currenttxskb=00000000 dnld_sent=2
>libertas_cs enter: if_cs_get_int_status():650
>
>Read the int cause (IF_CS_C_S_CMD_UPLD_RDY) and clear it:
>
>##inw 00000022<0000
>##outw 00000022>0000
>
>Forgot about this now:
>
>##inw 00000020<000d
>libertas_cs enter: if_cs_receive_cmdres():357
>##inw 00000020<000d
>
>
>Read the data back (e.g. MAC adress of the card etc):
>
>##inw 00000030<0036
>##insw 00000012<(0x1b words)
>libertas_cs leave: if_cs_receive_cmdres():382, ret 0, len 46
>libertas_cs leave: if_cs_get_int_status():684, ret 0, ireg 0xd, hisregcpy 0x0
>libertas thread: main-thread 444: intcounter=0 currenttxskb=00000000 dnld_sent=0
>libertas thread: main-thread: cmd response ready
>libertas enter: lbs_process_rx_command():473
>libertas cmd: CMD_RESP: response 0x8003, seq 2, size 46, jiffies 578632
>libertas CMD_RESP: 03 80 2e 00 02 00 00 00 02 00 13 02 08 00 40 00
>libertas CMD_RESP: 00 16 41 72 f6 a8 40 30 01 00 10 00 05 00 00 00
>libertas CMD_RESP: 00 00 00 00 00 00 00 00 00 00 03 03 00 00
>libertas leave: lbs_process_rx_command():625, ret 0
>libertas enter: lbs_execute_next_command():1744
>libertas leave: lbs_execute_next_command():1879
>
>
>
>So, basically you don't get an interrupt. MAYBE it's
>because of the PCMCIA subsystem (your kernel is way older).
>Be my guest to look into if_cs_probe(), this is where this
>happens.
>
>For me, the PCMCIA stuff was a little opaque. Part of the
>code I wrote by looking at other drivers, part by trying
>and part by peeking into drivers/pcmcia/cs.c, ds.c, etc.
>
>_______________________________________________
>libertas-dev mailing list
>libertas-dev at lists.infradead.org
>http://lists.infradead.org/mailman/listinfo/libertas-dev
>
>
>  
>

-- 

Cyril Haenel
Registered Linux User #332632