11 def modprobe(module, args = ""):
12 ret = os.system("/sbin/modprobe %s %s" % (module, args))
13 if os.WEXITSTATUS(ret) == 0:
14 globals()['loadedmodules'].write("%s\n" % module)
21 kernel = os.uname()[2]
25 if os.path.exists(kernel):
28 path = "/lib/modules/%s/modules.pcimap" % kernel
30 pcimap = pypcimap.PCIMap(path)
31 print "pl_hwinit: loading applicable modules"
32 devices = pypciscan.get_devices()
36 globals()['loadedmodules'] = file('/tmp/loadedmodules', 'w')
37 for (slot, dev) in devices.iteritems():
38 modules = pcimap.get(dev)
39 base = (dev[4] & 0xff0000) >> 16
41 if base == 0x01 or base == 0x02:
42 # storage or network device, in that order
43 missing.append((slot, dev))
50 # FIXME: This needs improved logic in the case of multiple matching modules
51 for module in modules:
52 print "pl_hwinit: found and loading module %s (%s)" % (module, slot)
55 if network_devices == 0:
56 print "pl_hwinit: no supported network devices found!"
57 print "pl_hwinit: the following devices were found, but have no driver:"
58 print "pl_hwinit: ", "\npl_hwinit: ".join(missing)
60 # XXX: could check for storage devices too, but older kernels have a lot of that built-in
62 # sd_mod won't get loaded automatically
63 print "pl_hwinit: loading sd_mod"
66 # load usb_storage to support node conf files on flash disks
67 print "pl_hwinit: loading usb_storage"
68 modprobe("usb_storage")
70 print "pl_hwinit: loading floppy device driver"
71 modprobe("floppy","floppy=0,allowed_drive_mask")
73 # always wait a bit between loading the usb drivers, and checking /sys/
74 # for usb devices (this isn't necessarily for waiting for mass storage files,
76 print "pl_hwinit: waiting for usb system to initialize."
79 # sometimes, flash devices take a while to initialize. in fact, the kernel
80 # intentionally waits 5 seconds for a device to 'settle'. some take even longer
81 # to show up. if there are any mass storage devices on the system, try to
82 # delay until they come online, up to a max delay of 30s.
84 # the way this will be done is to look for files in /sys/devices that are named
85 # 'bInterfaceClass', these will be a list of the usb devices on the system, and
86 # their primary usb device interface class ids. The base directory these files
87 # exist in will be the full path to the /sys/device entry for that device.
88 # for each mass storage devices (they have an interface class value of 08),
89 # we wait for a new symbolic link named 'driver' to exist in that directory,
90 # indicating the kernel loaded a driver for that device.
92 # usb interface class id for mass storage
93 INTERFACE_CLASS_MASS_STORAGE = "08"
95 # how long to wait in seconds before continuing on if devices
97 MAX_USB_WAIT_TIME = 30
99 # low long in seconds to wait between checks
100 PER_CHECK_USB_WAIT_TIME = 5
103 # find out if the device identified by the /sys dir has a module
104 # loaded for it. check for a symlink in the dir named driver.
105 def does_device_dir_have_driver(device):
106 return os.path.exists(os.path.join(device, "driver"))
108 def filter_and_add(list, directory, files):
109 if ("bInterfaceClass" in files and
110 int(file(os.path.join(directory, "bInterfaceClass")).read(), 16) == INTERFACE_CLASS_MASS_STORAGE):
111 list.append(directory)
114 os.path.walk("/sys/devices", filter_and_add, wait_dev_list)
116 if len(wait_dev_list) > 0:
117 print "pl_hwinit: found USB mass storage device(s). Attempting to wait"
118 print "pl_hwinit: up to %d seconds for them to come online." % MAX_USB_WAIT_TIME
122 while total_wait_time < MAX_USB_WAIT_TIME:
123 total_wait_time += PER_CHECK_USB_WAIT_TIME
125 print "pl_hwinit: waiting %d seconds." % PER_CHECK_USB_WAIT_TIME
126 time.sleep(PER_CHECK_USB_WAIT_TIME)
128 all_devices_online = True
129 for device in wait_dev_list:
130 if not does_device_dir_have_driver(device):
131 all_devices_online = False
133 if all_devices_online:
135 print "pl_hwinit: looks like the devices are now online."
138 print "pl_hwinit: not all devices online yet, waiting..."
141 print "pl_hwinit: Succesfully waited for USB mass storage devices"
142 print "pl_hwinit: to come online."
144 print "pl_hwinit: One or more USB mass storage devices did not"
145 print "pl_hwinit: initialize in time. Continuing anyway."
147 if __name__ == "__main__":