diff options
| author | Victor Gallardo <vgallardo@amcc.com> | 2008-09-18 12:41:26 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-10-08 15:27:14 -0700 |
| commit | 6fbc779c03591ee536fef9efb7d7e20f281d0b5c (patch) | |
| tree | 2721ba739886a19f600082c97aeba48a6358f680 | |
| parent | c6d6a511d768cf7627ab54fc18f40edf85097362 (diff) | |
ibm_newemac: Fix EMAC soft reset on 460EX/GT
This patch fixes EMAC soft reset on 460EX/GT when no external clock is
available.
Signed-off-by: Victor Gallardo <vgallardo@amcc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/powerpc/include/asm/dcr-regs.h | 4 | ||||
| -rw-r--r-- | drivers/net/ibm_newemac/core.c | 18 | ||||
| -rw-r--r-- | drivers/net/ibm_newemac/core.h | 5 |
3 files changed, 27 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/dcr-regs.h b/arch/powerpc/include/asm/dcr-regs.h index 29b0ecef980..f15296cf359 100644 --- a/arch/powerpc/include/asm/dcr-regs.h +++ b/arch/powerpc/include/asm/dcr-regs.h @@ -68,6 +68,10 @@ #define SDR0_UART3 0x0123 #define SDR0_CUST0 0x4000 +/* SDRs (460EX/460GT) */ +#define SDR0_ETH_CFG 0x4103 +#define SDR0_ETH_CFG_ECS 0x00000100 /* EMAC int clk source */ + /* * All those DCR register addresses are offsets from the base address * for the SRAM0 controller (e.g. 0x20 on 440GX). The base address is diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c index ccd9d9058f6..58dfd32ccca 100644 --- a/drivers/net/ibm_newemac/core.c +++ b/drivers/net/ibm_newemac/core.c @@ -130,6 +130,7 @@ static inline void emac_report_timeout_error(struct emac_instance *dev, const char *error) { if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX | + EMAC_FTR_460EX_PHY_CLK_FIX | EMAC_FTR_440EP_PHY_CLK_FIX)) DBG(dev, "%s" NL, error); else if (net_ratelimit()) @@ -351,10 +352,24 @@ static int emac_reset(struct emac_instance *dev) emac_tx_disable(dev); } +#ifdef CONFIG_PPC_DCR_NATIVE + /* Enable internal clock source */ + if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) + dcri_clrset(SDR0, SDR0_ETH_CFG, + 0, SDR0_ETH_CFG_ECS << dev->cell_index); +#endif + out_be32(&p->mr0, EMAC_MR0_SRST); while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n) --n; +#ifdef CONFIG_PPC_DCR_NATIVE + /* Enable external clock source */ + if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) + dcri_clrset(SDR0, SDR0_ETH_CFG, + SDR0_ETH_CFG_ECS << dev->cell_index, 0); +#endif + if (n) { dev->reset_failed = 0; return 0; @@ -2559,6 +2574,9 @@ static int __devinit emac_init_config(struct emac_instance *dev) /* Check EMAC version */ if (of_device_is_compatible(np, "ibm,emac4sync")) { dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC); + if (of_device_is_compatible(np, "ibm,emac-460ex") || + of_device_is_compatible(np, "ibm,emac-460gt")) + dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX; } else if (of_device_is_compatible(np, "ibm,emac4")) { dev->features |= EMAC_FTR_EMAC4; if (of_device_is_compatible(np, "ibm,emac-440gx")) diff --git a/drivers/net/ibm_newemac/core.h b/drivers/net/ibm_newemac/core.h index 6545e69d12c..5ca70e55b6c 100644 --- a/drivers/net/ibm_newemac/core.h +++ b/drivers/net/ibm_newemac/core.h @@ -317,6 +317,10 @@ struct emac_instance { * The 405EX and 460EX contain the EMAC4SYNC core */ #define EMAC_FTR_EMAC4SYNC 0x00000200 +/* + * Set if we need phy clock workaround for 460ex or 460gt + */ +#define EMAC_FTR_460EX_PHY_CLK_FIX 0x00000400 /* Right now, we don't quite handle the always/possible masks on the @@ -341,6 +345,7 @@ enum { #ifdef CONFIG_IBM_NEW_EMAC_RGMII EMAC_FTR_HAS_RGMII | #endif + EMAC_FTR_460EX_PHY_CLK_FIX | EMAC_FTR_440EP_PHY_CLK_FIX, }; |