Hi, On Thu, Sep 23, 2010 at 06:35:11AM -0500, Jon Povey wrote:
loading musb_hdrc with debug=7 shows up some suspicious differences when receiving a 64-byte line, some console logs below. I note that bits 0x3 of csr are set in the problem case.
that's RxPktRdy and FifoFull.
64-byte RX (wedges things, but gets to tty): cppi_interrupt 1172: CPPI IRQ Tx0 Rx1 cppi_dump_rx 377: RX DMA0/K: 0 left, csr 2003, 00000000 H00000000 S873388a0 C873388a0, B86854040 L004001c0 00000040 .. 873388a0
Can you check if you have the same with 512 byte transfers ??
cppi_rx_scan 1045: C/RXBD 873388a0: nxt 00000000 buf 86854000 off.len 00000040 opt.len d0000040 (0) cppi_dump_rx 377: RX DMA0/completed: 0 left, csr 2003, 00000000 H00000000 S873388a0 C873388a0, B86854040 L004001c0 00000040 .. 873388a0 musb_g_rx 757: <== ep1out, rxcsr 2003 (dma) c6e92d00 musb_g_rx 800: RXCSR1 0003, dma off, 0003, len 64, req c6e92d00 musb_g_giveback 143: ep1out done request c6e92d00, 64/512 gs_read_complete: req c6e92d00 cppi_next_rx_segment 831: RX DMA0 seg, maxp 512 onepacket bds 1 (cnt 0) dma 0x86854200 len 512 0/512 RXBD/S 873388c0: nxt 00000000 buf 86854200 off.blen 00000200 opt.plen e0000200 cppi_dump_rx 377: RX DMA0/S: 3 left, csr 0003, 00000000 H873388c0 S873388a0 C873388a0, B86854040 L004001c0 00000040 .. 873388a0 davinci_interrupt 292: IRQ 00000000 ttyGS 64 bytes to tty (t T . ... 0x30 0x0a) musb_gadget_queue 1120: <== to ep1out request=c6e92d00 musb_gadget_queue 1120: <== to ep1in request=c6e927c0 musb_ep_restart 1088: <== TX/IN request c6e927c0 len 1 on hw_ep1 txstate 298: hw_ep1, maxpacket 512, fifo count 1, txcsr 2404
what's this one byte you're sending back ?
cppi_next_tx_segment 604: TX DMA0, pktSz 512 transparent bds 1 dma 0x86854a00 len 1 cppi_next_tx_segment 658: TXBD ff32a800: nxt 00000000 buf 86854a00 len 0001 opt e0000001 cppi_dump_tx 405: TX DMA0/S: csr 3403, H00000000 S86e71800 C86e71800 86854a01, F00020000 L00000001 .. 86e71800 txstate 410: ep1in TX/IN dma len 0/1, txcsr 3404, fifo 1/512 cppi_interrupt 1172: CPPI IRQ Tx1 Rx0 cppi_dump_tx 405: TX DMA0/E: csr 3404, H00000000 S86e71800 C86e71800 86854a01, F00020000 L00000001 .. 86e71800 cppi_interrupt 1217: C/TXBD ff32a800 n 0 b 86854a00 off 1 opt d0000000 musb_g_tx 430: <== ep1in, txcsr 3404 musb_g_tx 475: TXCSR1 2400, DMA off, len 1, req c6e927c0 musb_g_giveback 143: ep1in done request c6e927c0, 1/1 musb_g_tx 522: ep1in idle now Subsequent 63-byte RX (fails to arrive at tty) Not quite sure what's going on here, something very different: davinci_interrupt 292: IRQ 00000001 musb_interrupt 1583: ** IRQ peripheral usb0000 tx0001 rx0000
only ep0 IRQ ?!? weird.
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