diff options
| -rw-r--r-- | arch/powerpc/sysdev/fsl_rio.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c index 935822a2503..dca8eead396 100644 --- a/arch/powerpc/sysdev/fsl_rio.c +++ b/arch/powerpc/sysdev/fsl_rio.c @@ -942,6 +942,48 @@ static int fsl_rio_get_cmdline(char *s) __setup("riohdid=", fsl_rio_get_cmdline); +static inline void fsl_rio_info(struct device *dev, u32 ccsr) +{ + const char *str; + if (ccsr & 1) { + /* Serial phy */ + switch (ccsr >> 30) { + case 0: + str = "1"; + break; + case 1: + str = "4"; + break; + default: + str = "Unknown"; + break;; + } + dev_info(dev, "Hardware port width: %s\n", str); + + switch ((ccsr >> 27) & 7) { + case 0: + str = "Single-lane 0"; + break; + case 1: + str = "Single-lane 2"; + break; + case 2: + str = "Four-lane"; + break; + default: + str = "Unknown"; + break; + } + dev_info(dev, "Training connection status: %s\n", str); + } else { + /* Parallel phy */ + if (!(ccsr & 0x80000000)) + dev_info(dev, "Output port operating in 8-bit mode\n"); + if (!(ccsr & 0x08000000)) + dev_info(dev, "Input port operating in 8-bit mode\n"); + } +} + /** * fsl_rio_setup - Setup MPC85xx RapidIO interface * @fsl_rio_setup - Setup Freescale PowerPC RapidIO interface @@ -1055,6 +1097,35 @@ int fsl_rio_setup(struct of_device *dev) (port->phy_type == RIO_PHY_PARALLEL) ? "parallel" : ((port->phy_type == RIO_PHY_SERIAL) ? "serial" : "unknown")); + /* Checking the port training status */ + if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) { + dev_err(&dev->dev, "Port is not ready. " + "Try to restart connection...\n"); + switch (port->phy_type) { + case RIO_PHY_SERIAL: + /* Disable ports */ + out_be32(priv->regs_win + RIO_CCSR, 0); + /* Set 1x lane */ + setbits32(priv->regs_win + RIO_CCSR, 0x02000000); + /* Enable ports */ + setbits32(priv->regs_win + RIO_CCSR, 0x00600000); + break; + case RIO_PHY_PARALLEL: + /* Disable ports */ + out_be32(priv->regs_win + RIO_CCSR, 0x22000000); + /* Enable ports */ + out_be32(priv->regs_win + RIO_CCSR, 0x44000000); + break; + } + msleep(100); + if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) { + dev_err(&dev->dev, "Port restart failed.\n"); + rc = -ENOLINK; + goto err; + } + dev_info(&dev->dev, "Port restart success!\n"); + } + fsl_rio_info(&dev->dev, ccsr); port->sys_size = (in_be32((priv->regs_win + RIO_PEF_CAR)) & RIO_PEF_CTLS) >> 4; |