Re: [Qemu-devel] [PATCH] rtl8139: correctly handle PHY reset

[Jason Wang <jasowang@redhat.com>]

On 2016年12月14日 03:44, Hervé Poussineau wrote:
> According to datasheet:
> "[Bit 15 of Basic Mode Control Register] sets the status and control registers
> of the PHY (register 0062-0074) in a default state. This bit is self-clearing.
> 1 = software reset; 0 = normal operation."
>
> This fixes the netcard detection failure in Minoca OS.
>
> Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
> ---
>   hw/net/rtl8139.c | 34 +++++++++++++++++++++-------------
>   1 file changed, 21 insertions(+), 13 deletions(-)
>
> diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
> index f05e59c..671c7e4 100644
> --- a/hw/net/rtl8139.c
> +++ b/hw/net/rtl8139.c
> @@ -1205,6 +1205,20 @@ static void rtl8139_reset_rxring(RTL8139State *s, uint32_t bufferSize)
>       s->RxBufAddr = 0;
>   }
>   
> +static void rtl8139_reset_phy(RTL8139State *s)
> +{
> +    s->BasicModeStatus  = 0x7809;
> +    s->BasicModeStatus |= 0x0020; /* autonegotiation completed */
> +    /* preserve link state */
> +    s->BasicModeStatus |= qemu_get_queue(s->nic)->link_down ? 0 : 0x04;
> +
> +    s->NWayAdvert    = 0x05e1; /* all modes, full duplex */
> +    s->NWayLPAR      = 0x05e1; /* all modes, full duplex */
> +    s->NWayExpansion = 0x0001; /* autonegotiation supported */
> +
> +    s->CSCR = CSCR_F_LINK_100 | CSCR_HEART_BIT | CSCR_LD;
> +}
> +
>   static void rtl8139_reset(DeviceState *d)
>   {
>       RTL8139State *s = RTL8139(d);
> @@ -1256,25 +1270,14 @@ static void rtl8139_reset(DeviceState *d)
>       s->Config3 = 0x1; /* fast back-to-back compatible */
>       s->Config5 = 0x0;
>   
> -    s->CSCR = CSCR_F_LINK_100 | CSCR_HEART_BIT | CSCR_LD;
> -
>       s->CpCmd   = 0x0; /* reset C+ mode */
>       s->cplus_enabled = 0;
>   
> -
>   //    s->BasicModeCtrl = 0x3100; // 100Mbps, full duplex, autonegotiation
>   //    s->BasicModeCtrl = 0x2100; // 100Mbps, full duplex
>       s->BasicModeCtrl = 0x1000; // autonegotiation
>   
> -    s->BasicModeStatus  = 0x7809;
> -    //s->BasicModeStatus |= 0x0040; /* UTP medium */
> -    s->BasicModeStatus |= 0x0020; /* autonegotiation completed */
> -    /* preserve link state */
> -    s->BasicModeStatus |= qemu_get_queue(s->nic)->link_down ? 0 : 0x04;
> -
> -    s->NWayAdvert    = 0x05e1; /* all modes, full duplex */
> -    s->NWayLPAR      = 0x05e1; /* all modes, full duplex */
> -    s->NWayExpansion = 0x0001; /* autonegotiation supported */
> +    rtl8139_reset_phy(s);
>   
>       /* also reset timer and disable timer interrupt */
>       s->TCTR = 0;
> @@ -1469,7 +1472,7 @@ static void rtl8139_BasicModeCtrl_write(RTL8139State *s, uint32_t val)
>       DPRINTF("BasicModeCtrl register write(w) val=0x%04x\n", val);
>   
>       /* mask unwritable bits */
> -    uint32_t mask = 0x4cff;
> +    uint32_t mask = 0xccff;
>   
>       if (1 || !rtl8139_config_writable(s))
>       {
> @@ -1479,6 +1482,11 @@ static void rtl8139_BasicModeCtrl_write(RTL8139State *s, uint32_t val)
>           mask |= 0x0100;
>       }
>   
> +    if (val & 0x8000) {
> +        /* Reset PHY */
> +        rtl8139_reset_phy(s);
> +    }
> +
>       val = SET_MASKED(val, mask, s->BasicModeCtrl);
>   
>       s->BasicModeCtrl = val;

Applied to -net.

Thanks