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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 57e06c1 "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>
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Kirill Smelkov
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Greg Kroah-Hartman
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Jul 8, 2011
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /* | ||
| * Copyright (C) 2007 by Alan Stern | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License as published by the | ||
| * Free Software Foundation; either version 2 of the License, or (at your | ||
| * option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | ||
| * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| * for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; if not, write to the Free Software Foundation, | ||
| * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| */ | ||
|
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| /* this file is part of ehci-hcd.c */ | ||
|
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| /* Display the ports dedicated to the companion controller */ | ||
| static ssize_t show_companion(struct device *dev, | ||
| struct device_attribute *attr, | ||
| char *buf) | ||
| { | ||
| struct ehci_hcd *ehci; | ||
| int nports, index, n; | ||
| int count = PAGE_SIZE; | ||
| char *ptr = buf; | ||
|
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| ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); | ||
| nports = HCS_N_PORTS(ehci->hcs_params); | ||
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| for (index = 0; index < nports; ++index) { | ||
| if (test_bit(index, &ehci->companion_ports)) { | ||
| n = scnprintf(ptr, count, "%d\n", index + 1); | ||
| ptr += n; | ||
| count -= n; | ||
| } | ||
| } | ||
| return ptr - buf; | ||
| } | ||
|
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| /* | ||
| * Dedicate or undedicate a port to the companion controller. | ||
| * Syntax is "[-]portnum", where a leading '-' sign means | ||
| * return control of the port to the EHCI controller. | ||
| */ | ||
| static ssize_t store_companion(struct device *dev, | ||
| struct device_attribute *attr, | ||
| const char *buf, size_t count) | ||
| { | ||
| struct ehci_hcd *ehci; | ||
| int portnum, new_owner; | ||
|
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| ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); | ||
| new_owner = PORT_OWNER; /* Owned by companion */ | ||
| if (sscanf(buf, "%d", &portnum) != 1) | ||
| return -EINVAL; | ||
| if (portnum < 0) { | ||
| portnum = - portnum; | ||
| new_owner = 0; /* Owned by EHCI */ | ||
| } | ||
| if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) | ||
| return -ENOENT; | ||
| portnum--; | ||
| if (new_owner) | ||
| set_bit(portnum, &ehci->companion_ports); | ||
| else | ||
| clear_bit(portnum, &ehci->companion_ports); | ||
| set_owner(ehci, portnum, new_owner); | ||
| return count; | ||
| } | ||
| static DEVICE_ATTR(companion, 0644, show_companion, store_companion); | ||
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| static inline int create_sysfs_files(struct ehci_hcd *ehci) | ||
| { | ||
| int i = 0; | ||
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| /* with integrated TT there is no companion! */ | ||
| if (!ehci_is_TDI(ehci)) | ||
| i = device_create_file(ehci_to_hcd(ehci)->self.controller, | ||
| &dev_attr_companion); | ||
| return i; | ||
| } | ||
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| static inline void remove_sysfs_files(struct ehci_hcd *ehci) | ||
| { | ||
| /* with integrated TT there is no companion! */ | ||
| if (!ehci_is_TDI(ehci)) | ||
| device_remove_file(ehci_to_hcd(ehci)->self.controller, | ||
| &dev_attr_companion); | ||
| } |