10 ret = os.system("/sbin/modprobe %s" % module)
11 return os.WEXITSTATUS(ret) == 0
15 kernel = os.uname()[2]
19 if os.path.exists(kernel):
22 path = "/lib/modules/%s/modules.pcimap" % kernel
24 pcimap = pypcimap.PCIMap(path)
25 print "pl_hwinit: loading applicable modules"
26 devices = pypciscan.get_devices()
30 for (slot, dev) in devices.iteritems():
31 modules = pcimap.get(dev)
32 base = (dev[4] & 0xff0000) >> 16
34 if base == 0x01 or base == 0x02:
35 # storage or network device, in that order
36 missing.append((slot, dev))
43 # FIXME: This needs improved logic in the case of multiple matching modules
44 for module in modules:
45 print "pl_hwinit: found and loading module %s (%s)" % (module, slot)
48 if network_devices == 0:
49 print "pl_hwinit: no supported network devices found!"
50 print "pl_hwinit: the following devices were found, but have no driver:"
51 print "pl_hwinit: ", "\npl_hwinit: ".join(missing)
53 # XXX: could check for storage devices too, but older kernels have a lot of that built-in
55 # sd_mod won't get loaded automatically
56 print "pl_hwinit: loading sd_mod"
59 # load usb_storage to support node conf files on flash disks
60 print "pl_hwinit: loading usb_storage"
61 modprobe("usb_storage")
63 print "pl_hwinit: loading floppy device driver"
66 # always wait a bit between loading the usb drivers, and checking /sys/
67 # for usb devices (this isn't necessarily for waiting for mass storage files,
69 print "pl_hwinit: waiting for usb system to initialize."
72 # sometimes, flash devices take a while to initialize. in fact, the kernel
73 # intentionally waits 5 seconds for a device to 'settle'. some take even longer
74 # to show up. if there are any mass storage devices on the system, try to
75 # delay until they come online, up to a max delay of 30s.
77 # the way this will be done is to look for files in /sys/devices that are named
78 # 'bInterfaceClass', these will be a list of the usb devices on the system, and
79 # their primary usb device interface class ids. The base directory these files
80 # exist in will be the full path to the /sys/device entry for that device.
81 # for each mass storage devices (they have an interface class value of 08),
82 # we wait for a new symbolic link named 'driver' to exist in that directory,
83 # indicating the kernel loaded a driver for that device.
85 # usb interface class id for mass storage
86 INTERFACE_CLASS_MASS_STORAGE = "08"
88 # how long to wait in seconds before continuing on if devices
90 MAX_USB_WAIT_TIME = 30
92 # low long in seconds to wait between checks
93 PER_CHECK_USB_WAIT_TIME = 5
96 # find out if the device identified by the /sys dir has a module
97 # loaded for it. check for a symlink in the dir named driver.
98 def does_device_dir_have_driver(device):
99 return os.path.exists(os.path.join(device, "driver"))
101 def filter_and_add(list, directory, files):
102 if ("bInterfaceClass" in files and
103 int(file(os.path.join(directory, "bInterfaceClass")).read(), 16) == INTERFACE_CLASS_MASS_STORAGE):
104 list.append(directory)
107 os.path.walk("/sys/devices", filter_and_add, wait_dev_list)
109 if len(wait_dev_list) > 0:
110 print "pl_hwinit: found USB mass storage device(s). Attempting to wait"
111 print "pl_hwinit: up to %d seconds for them to come online." % MAX_USB_WAIT_TIME
115 while total_wait_time < MAX_USB_WAIT_TIME:
116 total_wait_time += PER_CHECK_USB_WAIT_TIME
118 print "pl_hwinit: waiting %d seconds." % PER_CHECK_USB_WAIT_TIME
119 time.sleep(PER_CHECK_USB_WAIT_TIME)
121 all_devices_online = True
122 for device in wait_dev_list:
123 if not does_device_dir_have_driver(device):
124 all_devices_online = False
126 if all_devices_online:
128 print "pl_hwinit: looks like the devices are now online."
131 print "pl_hwinit: not all devices online yet, waiting..."
134 print "pl_hwinit: Succesfully waited for USB mass storage devices"
135 print "pl_hwinit: to come online."
137 print "pl_hwinit: One or more USB mass storage devices did not"
138 print "pl_hwinit: initialize in time. Continuing anyway."
140 if __name__ == "__main__":