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authorKirill Smelkov <kirr@mns.spb.ru>2011-07-03 12:36:56 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2011-07-08 17:51:32 -0400
commit4c67045bfc2c14a1d3c6040e80eb4a62946282dd (patch)
treeca35f86ed19c5a7850c23477717da9fec6d13ba9 /drivers/usb/host/ehci-sysfs.c
parent6f95b4b75295e40851e653e70884fc31c025789f (diff)
USB: EHCI: Move sysfs related bits into ehci-sysfs.c
The only sysfs attr implemented so far is "companion" from ehci-hub.c, but in the next patch we are going to add another sysfs file, so prior to that let's structure things and move already-in-there sysfs code to separate file. NOTE: All the code I'm moving into this new file was written by Alan Stern (in 57e06c11 "EHCI: force high-speed devices to run at full speed"; Jan 16 2007), that's why I'm putting Copyright (C) 2007 by Alan Stern there after explicit request from the author. Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-sysfs.c')
-rw-r--r--drivers/usb/host/ehci-sysfs.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-sysfs.c b/drivers/usb/host/ehci-sysfs.c
new file mode 100644
index 000000000000..29824a98aec9
--- /dev/null
+++ b/drivers/usb/host/ehci-sysfs.c
@@ -0,0 +1,94 @@
1/*
2 * Copyright (C) 2007 by Alan Stern
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19/* this file is part of ehci-hcd.c */
20
21
22/* Display the ports dedicated to the companion controller */
23static ssize_t show_companion(struct device *dev,
24 struct device_attribute *attr,
25 char *buf)
26{
27 struct ehci_hcd *ehci;
28 int nports, index, n;
29 int count = PAGE_SIZE;
30 char *ptr = buf;
31
32 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
33 nports = HCS_N_PORTS(ehci->hcs_params);
34
35 for (index = 0; index < nports; ++index) {
36 if (test_bit(index, &ehci->companion_ports)) {
37 n = scnprintf(ptr, count, "%d\n", index + 1);
38 ptr += n;
39 count -= n;
40 }
41 }
42 return ptr - buf;
43}
44
45/*
46 * Dedicate or undedicate a port to the companion controller.
47 * Syntax is "[-]portnum", where a leading '-' sign means
48 * return control of the port to the EHCI controller.
49 */
50static ssize_t store_companion(struct device *dev,
51 struct device_attribute *attr,
52 const char *buf, size_t count)
53{
54 struct ehci_hcd *ehci;
55 int portnum, new_owner;
56
57 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
58 new_owner = PORT_OWNER; /* Owned by companion */
59 if (sscanf(buf, "%d", &portnum) != 1)
60 return -EINVAL;
61 if (portnum < 0) {
62 portnum = - portnum;
63 new_owner = 0; /* Owned by EHCI */
64 }
65 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
66 return -ENOENT;
67 portnum--;
68 if (new_owner)
69 set_bit(portnum, &ehci->companion_ports);
70 else
71 clear_bit(portnum, &ehci->companion_ports);
72 set_owner(ehci, portnum, new_owner);
73 return count;
74}
75static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
76
77static inline int create_sysfs_files(struct ehci_hcd *ehci)
78{
79 int i = 0;
80
81 /* with integrated TT there is no companion! */
82 if (!ehci_is_TDI(ehci))
83 i = device_create_file(ehci_to_hcd(ehci)->self.controller,
84 &dev_attr_companion);
85 return i;
86}
87
88static inline void remove_sysfs_files(struct ehci_hcd *ehci)
89{
90 /* with integrated TT there is no companion! */
91 if (!ehci_is_TDI(ehci))
92 device_remove_file(ehci_to_hcd(ehci)->self.controller,
93 &dev_attr_companion);
94}