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authorGreg Ungerer <gerg@uclinux.org>2015-06-26 15:27:15 +1000
committerStefan Hajnoczi <stefanha@redhat.com>2015-07-27 14:12:04 +0100
commit299f7bec5a109db7563e1286cedf1f4d84e69e6d (patch)
tree49f58e746d8bc2a992098761ffbdaa06235a7fb0 /hw/net
parent3634869b27b6b2ff538bcc5bf8dfd1235ede7034 (diff)
hw/net: add simple phy support to mcf_fec driver
The Linux fec driver needs at least basic phy support to probe and work. The current qemu mcf_fec emulation has no support for the reading or writing of the MDIO lines to access an attached phy. This code adds a very simple set of register results for a fixed phy setup - very similar to that used on an m5208evb board. This is enough to probe and identify an emulated attached phy. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435296436-12152-4-git-send-email-gerg@uclinux.org Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'hw/net')
-rw-r--r--hw/net/mcf_fec.c50
1 files changed, 48 insertions, 2 deletions
diff --git a/hw/net/mcf_fec.c b/hw/net/mcf_fec.c
index 0255612f10..ea590172b9 100644
--- a/hw/net/mcf_fec.c
+++ b/hw/net/mcf_fec.c
@@ -8,6 +8,7 @@
#include "hw/hw.h"
#include "net/net.h"
#include "hw/m68k/mcf.h"
+#include "hw/net/mii.h"
/* For crc32 */
#include <zlib.h>
#include "exec/address-spaces.h"
@@ -216,6 +217,51 @@ static void mcf_fec_reset(mcf_fec_state *s)
s->rfsr = 0x500;
}
+#define MMFR_WRITE_OP (1 << 28)
+#define MMFR_READ_OP (2 << 28)
+#define MMFR_PHYADDR(v) (((v) >> 23) & 0x1f)
+#define MMFR_REGNUM(v) (((v) >> 18) & 0x1f)
+
+static uint64_t mcf_fec_read_mdio(mcf_fec_state *s)
+{
+ uint64_t v;
+
+ if (s->mmfr & MMFR_WRITE_OP)
+ return s->mmfr;
+ if (MMFR_PHYADDR(s->mmfr) != 1)
+ return s->mmfr |= 0xffff;
+
+ switch (MMFR_REGNUM(s->mmfr)) {
+ case MII_BMCR:
+ v = MII_BMCR_SPEED | MII_BMCR_AUTOEN | MII_BMCR_FD;
+ break;
+ case MII_BMSR:
+ v = MII_BMSR_100TX_FD | MII_BMSR_100TX_HD | MII_BMSR_10T_FD |
+ MII_BMSR_10T_HD | MII_BMSR_MFPS | MII_BMSR_AN_COMP |
+ MII_BMSR_AUTONEG | MII_BMSR_LINK_ST;
+ break;
+ case MII_PHYID1:
+ v = DP83848_PHYID1;
+ break;
+ case MII_PHYID2:
+ v = DP83848_PHYID2;
+ break;
+ case MII_ANAR:
+ v = MII_ANAR_TXFD | MII_ANAR_TX | MII_ANAR_10FD |
+ MII_ANAR_10 | MII_ANAR_CSMACD;
+ break;
+ case MII_ANLPAR:
+ v = MII_ANLPAR_ACK | MII_ANLPAR_TXFD | MII_ANLPAR_TX |
+ MII_ANLPAR_10FD | MII_ANLPAR_10 | MII_ANLPAR_CSMACD;
+ break;
+ default:
+ v = 0xffff;
+ break;
+ }
+ s->mmfr = (s->mmfr & ~0xffff) | v;
+ return s->mmfr;
+}
+
static uint64_t mcf_fec_read(void *opaque, hwaddr addr,
unsigned size)
{
@@ -226,7 +272,7 @@ static uint64_t mcf_fec_read(void *opaque, hwaddr addr,
case 0x010: return s->rx_enabled ? (1 << 24) : 0; /* RDAR */
case 0x014: return 0; /* TDAR */
case 0x024: return s->ecr;
- case 0x040: return s->mmfr;
+ case 0x040: return mcf_fec_read_mdio(s);
case 0x044: return s->mscr;
case 0x064: return 0; /* MIBC */
case 0x084: return s->rcr;
@@ -287,8 +333,8 @@ static void mcf_fec_write(void *opaque, hwaddr addr,
}
break;
case 0x040:
- /* TODO: Implement MII. */
s->mmfr = value;
+ s->eir |= FEC_INT_MII;
break;
case 0x044:
s->mscr = value & 0xfe;