11 def modprobe(module, args = None):
13 ret = os.system("/sbin/modprobe %s %s" % (module, args))
15 ret = os.system("/sbin/modprobe %s" % module)
16 if os.WEXITSTATUS(ret) == 0:
17 globals()['loadedmodules'].write("%s\n" % module)
24 kernel = os.uname()[2]
28 if os.path.exists(kernel):
31 path = "/lib/modules/%s/modules.pcimap" % kernel
33 pcimap = pypcimap.PCIMap(path)
34 print "pl_hwinit: loading applicable modules"
35 devices = pypciscan.get_devices()
39 globals()['loadedmodules'] = file('/tmp/loadedmodules', 'w')
40 for (slot, dev) in devices.iteritems():
41 modules = pcimap.get(dev)
42 base = (dev[4] & 0xff0000) >> 16
44 if base == 0x01 or base == 0x02:
45 # storage or network device, in that order
46 missing.append((slot, dev))
53 # FIXME: This needs improved logic in the case of multiple matching modules
54 for module in modules:
55 print "pl_hwinit: found and loading module %s (%s)" % (module, slot)
58 if network_devices == 0:
59 print "pl_hwinit: no supported network devices found!"
60 print "pl_hwinit: the following devices were found, but have no driver:"
61 print "pl_hwinit: ", "\npl_hwinit: ".join(missing)
63 # XXX: could check for storage devices too, but older kernels have a lot of that built-in
65 # sd_mod won't get loaded automatically
66 print "pl_hwinit: loading sd_mod"
69 # load usb_storage to support node conf files on flash disks
70 print "pl_hwinit: loading usb_storage"
71 modprobe("usb_storage")
73 print "pl_hwinit: loading floppy device driver"
74 modprobe("floppy","floppy=0,allowed_drive_mask")
76 # always wait a bit between loading the usb drivers, and checking /sys/
77 # for usb devices (this isn't necessarily for waiting for mass storage files,
79 print "pl_hwinit: waiting for usb system to initialize."
82 # sometimes, flash devices take a while to initialize. in fact, the kernel
83 # intentionally waits 5 seconds for a device to 'settle'. some take even longer
84 # to show up. if there are any mass storage devices on the system, try to
85 # delay until they come online, up to a max delay of 30s.
87 # the way this will be done is to look for files in /sys/devices that are named
88 # 'bInterfaceClass', these will be a list of the usb devices on the system, and
89 # their primary usb device interface class ids. The base directory these files
90 # exist in will be the full path to the /sys/device entry for that device.
91 # for each mass storage devices (they have an interface class value of 08),
92 # we wait for a new symbolic link named 'driver' to exist in that directory,
93 # indicating the kernel loaded a driver for that device.
95 # usb interface class id for mass storage
96 INTERFACE_CLASS_MASS_STORAGE = "08"
98 # how long to wait in seconds before continuing on if devices
100 MAX_USB_WAIT_TIME = 30
102 # low long in seconds to wait between checks
103 PER_CHECK_USB_WAIT_TIME = 5
106 # find out if the device identified by the /sys dir has a module
107 # loaded for it. check for a symlink in the dir named driver.
108 def does_device_dir_have_driver(device):
109 return os.path.exists(os.path.join(device, "driver"))
111 def filter_and_add(list, directory, files):
112 if ("bInterfaceClass" in files and
113 int(file(os.path.join(directory, "bInterfaceClass")).read(), 16) == INTERFACE_CLASS_MASS_STORAGE):
114 list.append(directory)
117 os.path.walk("/sys/devices", filter_and_add, wait_dev_list)
119 if len(wait_dev_list) > 0:
120 print "pl_hwinit: found USB mass storage device(s). Attempting to wait"
121 print "pl_hwinit: up to %d seconds for them to come online." % MAX_USB_WAIT_TIME
125 while total_wait_time < MAX_USB_WAIT_TIME:
126 total_wait_time += PER_CHECK_USB_WAIT_TIME
128 print "pl_hwinit: waiting %d seconds." % PER_CHECK_USB_WAIT_TIME
129 time.sleep(PER_CHECK_USB_WAIT_TIME)
131 all_devices_online = True
132 for device in wait_dev_list:
133 if not does_device_dir_have_driver(device):
134 all_devices_online = False
136 if all_devices_online:
138 print "pl_hwinit: looks like the devices are now online."
141 print "pl_hwinit: not all devices online yet, waiting..."
144 print "pl_hwinit: Succesfully waited for USB mass storage devices"
145 print "pl_hwinit: to come online."
147 print "pl_hwinit: One or more USB mass storage devices did not"
148 print "pl_hwinit: initialize in time. Continuing anyway."
150 if __name__ == "__main__":