p2020 srio reset-device

274302115 — Tue, 12 Feb 2019 07:24:12 GMT

Dear all,

the serial rapidIo interface 'Port x Link maintenance request command and statusregister (SRIO_P1LMREQCSR) ' said that the port can reset its link parter device if this reg written with a 0b011

But I found the p2020 srio port cannot be reset when its link parterner issue a link-request/rest-device ，neither can it reset its link parterner when writting a 0b11 on SRIO_P1LMREQCSR

Are there any special regs should be set ？

thanks

Re: p2020 srio reset-device

yipingwang — Sun, 10 Mar 2019 13:14:06 GMT

Hello baoyu yan,

Please refer to the attached RapidIO driver provided in Linux Kernel source code arch/powerpc/sysdev/fsl_rio.c.

Please refer to the following, if the port training failed, please restart the connection with the following procedure.

Please refer to "Port 1 Control command and status register(SRIO_P1CCSR)" in P2020 Reference Manual for details.

        if (in_be32((priv->regs_win + RIO_ESCSR + i*0x20)) & 1) {
                        dev_err(&dev->dev, "Port %d is not ready. "
                        "Try to restart connection...\n", i);
                        /* Disable ports */
                        out_be32(priv->regs_win
                                + RIO_CCSR + i*0x20, 0);
                        /* Set 1x lane */
                        setbits32(priv->regs_win
                                + RIO_CCSR + i*0x20, 0x02000000);
                        /* Enable ports */
                        setbits32(priv->regs_win
                                + RIO_CCSR + i*0x20, 0x00600000);
                        msleep(100);

If this is not what you need, please explain your purpose in details.

Thanks,

Yiping

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p2020 srio reset-device

Re: p2020 srio reset-device