Re: [PATCH] hw/net/tulip: add chip status register values

[Helge Deller]

On 2/5/24 20:47, Sven Schnelle wrote:

Netbsd isn't able to detect a link on the emulated tulip card. That's
because netbsd reads the Chip Status Register of the Phy (address
0x14). The default phy data in the qemu tulip driver is all zero,
which means no link is established and autonegotation isn't complete.

Therefore set the register to 0x3b40, which means:

Link is up, Autonegotation complete, Full Duplex, 100MBit/s Link
speed.

Also clear the mask because this register is read only.

Signed-off-by: Sven Schnelle <sv...@stackframe.org>

Reviewed-by: Helge Deller <del...@gmx.de>
Tested-by: Helge Deller <del...@gmx.de>

Can be easily tested without installation:
Download: wget 
https://cdn.netbsd.org/pub/NetBSD/NetBSD-9.3/iso/NetBSD-9.3-hppa.iso
Run: ./qemu-system-hppa -cdrom NetBSD-9.3-hppa.iso -nographic
-> a) Installation on English
-> e) Utility Menu
-> c) configure network

Helge

---
  hw/net/tulip.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/net/tulip.c b/hw/net/tulip.c
index 6d4fb06dad..1f2ef20977 100644
--- a/hw/net/tulip.c
+++ b/hw/net/tulip.c
@@ -421,7 +421,7 @@ static uint16_t tulip_mdi_default[] = {
      /* MDI Registers 8 - 15 */
      0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
      /* MDI Registers 16 - 31 */
-    0x0003, 0x0000, 0x0001, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0003, 0x0000, 0x0001, 0x0000, 0x3b40, 0x0000, 0x0000, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
  };

@@ -429,7 +429,7 @@ static uint16_t tulip_mdi_default[] = {
  static const uint16_t tulip_mdi_mask[] = {
      0x0000, 0xffff, 0xffff, 0xffff, 0xc01f, 0xffff, 0xffff, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-    0x0fff, 0x0000, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
+    0x0fff, 0x0000, 0xffff, 0xffff, 0x0000, 0xffff, 0xffff, 0xffff,
      0xffff, 0xffff, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
  };