powerpc/mpc8548: Add workaround for erratum NMG_eTSEC129

Erratum NMG_eTSEC129 (eTSEC86 in MPC8548 document) applies to some early
verion silicons. This workaround detects if the eTSEC Rx logic is properly
initialized, and reinitialize the eTSEC Rx logic.

Signed-off-by: Gong Chen <g.chen@freescale.com>
Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index a09eb91..253bf08 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -103,6 +103,10 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #ifdef CONFIG_SYS_FSL_ERRATUM_NMG_LBC103
        puts("Work-around for Erratum NMG_LBC103 enabled\n");
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_ETSEC129
+       if ((SVR_MAJ(svr) == 1) || IS_SVR_REV(svr, 2, 0))
+               puts("Work-around for Erratum NMG ETSEC129 enabled\n");
+#endif
        return 0;
 }
 

diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index c3d6ba9..981d639 100644 (file)
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -64,6 +64,7 @@
 #define CONFIG_SYS_CCSRBAR_DEFAULT     0xff700000
 #define CONFIG_SYS_FSL_ERRATUM_NMG_DDR120
 #define CONFIG_SYS_FSL_ERRATUM_NMG_LBC103
+#define CONFIG_SYS_FSL_ERRATUM_NMG_ETSEC129
 
 #elif defined(CONFIG_MPC8555)
 #define CONFIG_MAX_CPUS                        1

diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
index 78ffc95..160bc05 100644 (file)
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -19,6 +19,7 @@
 #include <tsec.h>
 #include <fsl_mdio.h>
 #include <asm/errno.h>
+#include <asm/processor.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -43,6 +44,9 @@ static RTXBD rtx __attribute__ ((aligned(8)));
 #error "rtx must be 64-bit aligned"
 #endif
 
+static int tsec_send(struct eth_device *dev,
+       volatile void *packet, int length);
+
 /* Default initializations for TSEC controllers. */
 
 static struct tsec_info_struct tsec_info[] = {
@@ -236,6 +240,87 @@ static void adjust_link(struct tsec_private *priv, struct phy_device *phydev)
                        (phydev->port == PORT_FIBRE) ? ", fiber mode" : "");
 }
 
+#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_ETSEC129
+/*
+ * When MACCFG1[Rx_EN] is enabled during system boot as part
+ * of the eTSEC port initialization sequence,
+ * the eTSEC Rx logic may not be properly initialized.
+ */
+void redundant_init(struct eth_device *dev)
+{
+       struct tsec_private *priv = dev->priv;
+       tsec_t *regs = priv->regs;
+       uint t, count = 0;
+       int fail = 1;
+       static const u8 pkt[] = {
+               0x00, 0x1e, 0x4f, 0x12, 0xcb, 0x2c, 0x00, 0x25,
+               0x64, 0xbb, 0xd1, 0xab, 0x08, 0x00, 0x45, 0x00,
+               0x00, 0x5c, 0xdd, 0x22, 0x00, 0x00, 0x80, 0x01,
+               0x1f, 0x71, 0x0a, 0xc1, 0x14, 0x22, 0x0a, 0xc1,
+               0x14, 0x6a, 0x08, 0x00, 0xef, 0x7e, 0x02, 0x00,
+               0x94, 0x05, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
+               0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e,
+               0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76,
+               0x77, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+               0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+               0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+               0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
+               0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70,
+               0x71, 0x72};
+
+       /* Enable promiscuous mode */
+       setbits_be32(&regs->rctrl, 0x8);
+       /* Enable loopback mode */
+       setbits_be32(&regs->maccfg1, MACCFG1_LOOPBACK);
+       /* Enable transmit and receive */
+       setbits_be32(&regs->maccfg1, MACCFG1_RX_EN | MACCFG1_TX_EN);
+
+       /* Tell the DMA it is clear to go */
+       setbits_be32(&regs->dmactrl, DMACTRL_INIT_SETTINGS);
+       out_be32(&regs->tstat, TSTAT_CLEAR_THALT);
+       out_be32(&regs->rstat, RSTAT_CLEAR_RHALT);
+       clrbits_be32(&regs->dmactrl, DMACTRL_GRS | DMACTRL_GTS);
+
+       do {
+               tsec_send(dev, (void *)pkt, sizeof(pkt));
+
+               /* Wait for buffer to be received */
+               for (t = 0; rtx.rxbd[rxIdx].status & RXBD_EMPTY; t++) {
+                       if (t >= 10 * TOUT_LOOP) {
+                               printf("%s: tsec: rx error\n", dev->name);
+                               break;
+                       }
+               }
+
+               if (!memcmp(pkt, (void *)NetRxPackets[rxIdx], sizeof(pkt)))
+                       fail = 0;
+
+               rtx.rxbd[rxIdx].length = 0;
+               rtx.rxbd[rxIdx].status =
+                   RXBD_EMPTY | (((rxIdx + 1) == PKTBUFSRX) ? RXBD_WRAP : 0);
+               rxIdx = (rxIdx + 1) % PKTBUFSRX;
+
+               if (in_be32(&regs->ievent) & IEVENT_BSY) {
+                       out_be32(&regs->ievent, IEVENT_BSY);
+                       out_be32(&regs->rstat, RSTAT_CLEAR_RHALT);
+               }
+               if (fail) {
+                       printf("loopback recv packet error!\n");
+                       clrbits_be32(&regs->maccfg1, MACCFG1_RX_EN);
+                       udelay(1000);
+                       setbits_be32(&regs->maccfg1, MACCFG1_RX_EN);
+               }
+       } while ((count++ < 4) && (fail == 1));
+
+       if (fail)
+               panic("eTSEC init fail!\n");
+       /* Disable promiscuous mode */
+       clrbits_be32(&regs->rctrl, 0x8);
+       /* Disable loopback mode */
+       clrbits_be32(&regs->maccfg1, MACCFG1_LOOPBACK);
+}
+#endif
+
 /* Set up the buffers and their descriptors, and bring up the
  * interface
  */
@@ -248,6 +333,9 @@ static void startup_tsec(struct eth_device *dev)
        /* reset the indices to zero */
        rxIdx = 0;
        txIdx = 0;
+#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_ETSEC129
+       uint svr;
+#endif
 
        /* Point to the buffer descriptors */
        out_be32(&regs->tbase, (unsigned int)(&rtx.txbd[txIdx]));
@@ -269,6 +357,11 @@ static void startup_tsec(struct eth_device *dev)
        }
        rtx.txbd[TX_BUF_CNT - 1].status |= TXBD_WRAP;
 
+#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_ETSEC129
+       svr = get_svr();
+       if ((SVR_MAJ(svr) == 1) || IS_SVR_REV(svr, 2, 0))
+               redundant_init(dev);
+#endif
        /* Enable Transmit and Receive */
        setbits_be32(&regs->maccfg1, MACCFG1_RX_EN | MACCFG1_TX_EN);