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[RAPIDIO] Add RapidIO connection info print out and re-training for broken connections

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Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Zhang Wei 2008-04-18 13:33:44 -07:00 committed by Paul Mackerras
parent 61b269179d
commit 7f620df839
1 changed files with 71 additions and 0 deletions
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71
arch/powerpc/sysdev/fsl_rio.c
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@ -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;