On Mon, Nov 17, 2014 at 4:33 PM, Felipe Balbi [off-list ref] wrote:

quoted

quoted

quoted

+static int tegra_xhci_load_firmware(struct tegra_xhci_hcd *tegra)
+{
+     struct device *dev = tegra->dev;
+     struct tegra_xhci_fw_cfgtbl *cfg_tbl;
+     struct tm fw_tm;
+     u32 val, code_tag_blocks, code_size_blocks;
+     u64 fw_base;
+     time_t fw_time;
+     unsigned long timeout;
+
+     if (csb_readl(tegra, XUSB_CSB_MP_ILOAD_BASE_LO) != 0) {
+             dev_info(dev, "Firmware already loaded, Falcon state 0x%x\n",
+                      csb_readl(tegra, XUSB_FALC_CPUCTL));
+             return 0;
+     }

won't this prevent rmmod && insmod from succeeding ? Maybe not, as you
return 0 anyway, but if the firmware side craps out, it might be useful
to reload the firmware and reset that block. I wonder if this prevents
that.

rmmod && insmod does work with the above since, as you mentioned, we
return successfully if the controller is already running.  Attempting
to re-load the firmware if the controller is already running won't
work - it requires a full power-gate/ungate sequence of the
controller.  Unfortunately, that sequence is rather complicated and I
haven't had a chance to implement it yet.  it will hopefully be coming
later, though.

Alright, could you add a comment on the source code stating that ?
Perhaps a REVISIT note or FIXME ?

Sure, will do.