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more I2C debugging

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This commit is contained in:
Ralph Metzler 2015-09-09 12:13:11 +02:00
parent 71e4972863
commit 4209e3a03a
1 changed files with 12 additions and 5 deletions
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17
ddbridge/ddbridge-i2c.c
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@ -113,20 +113,27 @@ static int ddb_i2c_cmd(struct ddb_i2c *i2c, u32 adr, u32 cmd)
ddbwritel(dev, (adr << 9) | cmd, i2c->regs + I2C_COMMAND); ddbwritel(dev, (adr << 9) | cmd, i2c->regs + I2C_COMMAND);
stat = wait_for_completion_timeout(&i2c->completion, HZ); stat = wait_for_completion_timeout(&i2c->completion, HZ);
val = ddbreadl(dev, i2c->regs + I2C_COMMAND);
if (stat == 0) { if (stat == 0) {
pr_err("DDBridge I2C timeout, card %d, port %d, link %u\n", pr_err("DDBridge I2C timeout, card %d, port %d, link %u\n",
dev->nr, i2c->nr, i2c->link); dev->nr, i2c->nr, i2c->link);
#ifdef CONFIG_PCI_MSI #if 1
{ /* MSI debugging*/ {
u32 istat = ddbreadl(dev, INTERRUPT_STATUS); u32 istat = ddbreadl(dev, INTERRUPT_STATUS);
dev_err(dev->dev, "DDBridge IRS %08x\n", istat); dev_err(dev->dev, "DDBridge IRS %08x\n", istat);
ddbwritel(dev, istat, INTERRUPT_ACK); if (istat & 1) {
ddbwritel(dev, istat & 1, INTERRUPT_ACK);
} else {
u32 mon = ddbreadl(dev, i2c->regs + I2C_MONITOR);
dev_err(dev->dev, "I2C cmd=%08x mon=%08x\n",
val, mon);
}
} }
#endif #endif
return -EIO; return -EIO;
} }
val = ddbreadl(dev, i2c->regs + I2C_COMMAND);
if (val & 0x70000) if (val & 0x70000)
return -EIO; return -EIO;
return 0; return 0;