diff options
| -rw-r--r-- | drivers/net/smsc911x.c | 75 | ||||
| -rw-r--r-- | include/linux/smsc911x.h | 2 |
2 files changed, 40 insertions, 37 deletions
diff --git a/drivers/net/smsc911x.c b/drivers/net/smsc911x.c index 6aa2b165de6..27d2d7c4551 100644 --- a/drivers/net/smsc911x.c +++ b/drivers/net/smsc911x.c @@ -368,48 +368,53 @@ out: return reg; } -/* Autodetects and initialises external phy for SMSC9115 and SMSC9117 flavors. - * If something goes wrong, returns -ENODEV to revert back to internal phy. - * Performed at initialisation only, so interrupts are enabled */ -static int smsc911x_phy_initialise_external(struct smsc911x_data *pdata) +/* Switch to external phy. Assumes tx and rx are stopped. */ +static void smsc911x_phy_enable_external(struct smsc911x_data *pdata) { unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); - /* External phy is requested, supported, and detected */ - if (hwcfg & HW_CFG_EXT_PHY_DET_) { + /* Disable phy clocks to the MAC */ + hwcfg &= (~HW_CFG_PHY_CLK_SEL_); + hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_; + smsc911x_reg_write(pdata, HW_CFG, hwcfg); + udelay(10); /* Enough time for clocks to stop */ - /* Switch to external phy. Assuming tx and rx are stopped - * because smsc911x_phy_initialise is called before - * smsc911x_rx_initialise and tx_initialise. */ + /* Switch to external phy */ + hwcfg |= HW_CFG_EXT_PHY_EN_; + smsc911x_reg_write(pdata, HW_CFG, hwcfg); - /* Disable phy clocks to the MAC */ - hwcfg &= (~HW_CFG_PHY_CLK_SEL_); - hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_; - smsc911x_reg_write(pdata, HW_CFG, hwcfg); - udelay(10); /* Enough time for clocks to stop */ + /* Enable phy clocks to the MAC */ + hwcfg &= (~HW_CFG_PHY_CLK_SEL_); + hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_; + smsc911x_reg_write(pdata, HW_CFG, hwcfg); + udelay(10); /* Enough time for clocks to restart */ - /* Switch to external phy */ - hwcfg |= HW_CFG_EXT_PHY_EN_; - smsc911x_reg_write(pdata, HW_CFG, hwcfg); - - /* Enable phy clocks to the MAC */ - hwcfg &= (~HW_CFG_PHY_CLK_SEL_); - hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_; - smsc911x_reg_write(pdata, HW_CFG, hwcfg); - udelay(10); /* Enough time for clocks to restart */ + hwcfg |= HW_CFG_SMI_SEL_; + smsc911x_reg_write(pdata, HW_CFG, hwcfg); +} - hwcfg |= HW_CFG_SMI_SEL_; - smsc911x_reg_write(pdata, HW_CFG, hwcfg); +/* Autodetects and enables external phy if present on supported chips. + * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY + * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */ +static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata) +{ + unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); - SMSC_TRACE(HW, "Successfully switched to external PHY"); + if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) { + SMSC_TRACE(HW, "Forcing internal PHY"); + pdata->using_extphy = 0; + } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) { + SMSC_TRACE(HW, "Forcing external PHY"); + smsc911x_phy_enable_external(pdata); + pdata->using_extphy = 1; + } else if (hwcfg & HW_CFG_EXT_PHY_DET_) { + SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET set, using external PHY"); + smsc911x_phy_enable_external(pdata); pdata->using_extphy = 1; } else { - SMSC_WARNING(HW, "No external PHY detected, " - "Using internal PHY instead."); - /* Use internal phy */ - return -ENODEV; + SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET clear, using internal PHY"); + pdata->using_extphy = 0; } - return 0; } /* Fetches a tx status out of the status fifo */ @@ -825,22 +830,18 @@ static int __devinit smsc911x_mii_init(struct platform_device *pdev, pdata->mii_bus->parent = &pdev->dev; - pdata->using_extphy = 0; - switch (pdata->idrev & 0xFFFF0000) { case 0x01170000: case 0x01150000: case 0x117A0000: case 0x115A0000: /* External PHY supported, try to autodetect */ - if (smsc911x_phy_initialise_external(pdata) < 0) { - SMSC_TRACE(HW, "No external PHY detected, " - "using internal PHY"); - } + smsc911x_phy_initialise_external(pdata); break; default: SMSC_TRACE(HW, "External PHY is not supported, " "using internal PHY"); + pdata->using_extphy = 0; break; } diff --git a/include/linux/smsc911x.h b/include/linux/smsc911x.h index 1cbf0313add..170c76b8f7a 100644 --- a/include/linux/smsc911x.h +++ b/include/linux/smsc911x.h @@ -43,5 +43,7 @@ struct smsc911x_platform_config { /* Constants for flags */ #define SMSC911X_USE_16BIT (BIT(0)) #define SMSC911X_USE_32BIT (BIT(1)) +#define SMSC911X_FORCE_INTERNAL_PHY (BIT(2)) +#define SMSC911X_FORCE_EXTERNAL_PHY (BIT(3)) #endif /* __LINUX_SMSC911X_H__ */ |