[U-Boot] [PATCH] powerpc/85xx: fix null pointer dereference when initializing the SGMII TBI PHY

[Timur Tabi]

Function dtsec_configure_serdes() needs to know where the TBI PHY registers
are in order to configure SGMII for proper SerDes operation.

During SGMII initialzation, fm_eth_init_mac() passing NULL for 'phyregs' when
it called init_dtsec(), because it was believed that phyregs was not used.
In fact, it is used by dtsec_configure_serdes() to configure the TBI PHY
registers.

We also need to define the PHY registers in struct fm_mdio.

Signed-off-by: Timur Tabi <ti...@freescale.com>
---

Note: I'm not sure of my change to struct fm_mdio.  It works, but it doesn't
smell right.

 arch/powerpc/include/asm/fsl_fman.h |    9 ++++++++-
 drivers/net/fm/dtsec.c              |    2 +-
 drivers/net/fm/eth.c                |    3 ++-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/fsl_fman.h 
b/arch/powerpc/include/asm/fsl_fman.h
index fddc0cc..2c0c9bc 100644
--- a/arch/powerpc/include/asm/fsl_fman.h
+++ b/arch/powerpc/include/asm/fsl_fman.h
@@ -405,7 +405,14 @@ typedef struct fm_dtesc {
 } fm_dtsec_t;
 
 typedef struct fm_mdio {
-       u8      res[4*1024];
+       u8      res0[0x120];
+       u32     miimcfg;        /* MII management configuration reg */
+       u32     miimcom;        /* MII management command reg */
+       u32     miimadd;        /* MII management address reg */
+       u32     miimcon;        /* MII management control reg */
+       u32     miimstat;       /* MII management status reg  */
+       u32     miimind;        /* MII management indication reg */
+       u8      res1[0x1000 - 0x138];
 } fm_mdio_t;
 
 typedef struct fm_10gec {
diff --git a/drivers/net/fm/dtsec.c b/drivers/net/fm/dtsec.c
index a77ee20..7dd78f2 100644
--- a/drivers/net/fm/dtsec.c
+++ b/drivers/net/fm/dtsec.c
@@ -171,7 +171,7 @@ void init_dtsec(struct fsl_enet_mac *mac, void *base,
                void *phyregs, int max_rx_len)
 {
        mac->base = base;
-       mac->phyregs = NULL;
+       mac->phyregs = phyregs;
        mac->max_rx_len = max_rx_len;
        mac->init_mac = dtsec_init_mac;
        mac->enable_mac = dtsec_enable_mac;
diff --git a/drivers/net/fm/eth.c b/drivers/net/fm/eth.c
index 308d610..f7ed850 100644
--- a/drivers/net/fm/eth.c
+++ b/drivers/net/fm/eth.c
@@ -537,6 +537,7 @@ static int fm_eth_init_mac(struct fm_eth *fm_eth, struct 
ccsr_fman *reg)
        /* Get the mac registers base address */
        if (fm_eth->type == FM_ETH_1G_E) {
                base = &reg->mac_1g[num].fm_dtesc;
+               phyregs = &reg->mac_1g[num].fm_mdio.miimcfg;
        } else {
                base = &reg->mac_10g[num].fm_10gec;
                phyregs = &reg->mac_10g[num].fm_10gec_mdio;
@@ -552,7 +553,7 @@ static int fm_eth_init_mac(struct fm_eth *fm_eth, struct 
ccsr_fman *reg)
        fm_eth->mac = mac;
 
        if (fm_eth->type == FM_ETH_1G_E)
-               init_dtsec(mac, base, NULL, MAX_RXBUF_LEN);
+               init_dtsec(mac, base, phyregs, MAX_RXBUF_LEN);
        else
                init_tgec(mac, base, phyregs, MAX_RXBUF_LEN);
 
-- 
1.7.3.4


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