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| author | Greg Ungerer <gerg@uclinux.org> | 2015-06-26 15:27:15 +1000 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2015-07-27 14:12:04 +0100 |
| commit | 299f7bec5a109db7563e1286cedf1f4d84e69e6d (patch) | |
| tree | 49f58e746d8bc2a992098761ffbdaa06235a7fb0 | |
| parent | 3634869b27b6b2ff538bcc5bf8dfd1235ede7034 (diff) | |
| download | hqemu-299f7bec5a109db7563e1286cedf1f4d84e69e6d.zip hqemu-299f7bec5a109db7563e1286cedf1f4d84e69e6d.tar.gz | |
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>
| -rw-r--r-- | hw/net/mcf_fec.c | 50 | ||||
| -rw-r--r-- | include/hw/net/mii.h | 5 |
2 files changed, 53 insertions, 2 deletions
diff --git a/hw/net/mcf_fec.c b/hw/net/mcf_fec.c index 0255612..ea59017 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; diff --git a/include/hw/net/mii.h b/include/hw/net/mii.h index cd2a4e2..9fdd7bb 100644 --- a/include/hw/net/mii.h +++ b/include/hw/net/mii.h @@ -65,7 +65,12 @@ #define MII_ANLPAR_CSMACD (1 << 0) /* List of vendor identifiers */ +/* RealTek 8201 */ #define RTL8201CP_PHYID1 0x0000 #define RTL8201CP_PHYID2 0x8201 +/* National Semiconductor DP83848 */ +#define DP83848_PHYID1 0x2000 +#define DP83848_PHYID2 0x5c90 + #endif /* MII_H */ |
