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author | Kirill Smelkov <kirr@mns.spb.ru> | 2011-07-03 20:36:56 +0400 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-07-09 01:51:32 +0400 |
commit | 4c67045bfc2c14a1d3c6040e80eb4a62946282dd (patch) | |
tree | ca35f86ed19c5a7850c23477717da9fec6d13ba9 /drivers/usb/host/ehci-sysfs.c | |
parent | 6f95b4b75295e40851e653e70884fc31c025789f (diff) | |
download | linux-4c67045bfc2c14a1d3c6040e80eb4a62946282dd.tar.xz |
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.c | 94 |
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 @@ +/* + * 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. + */ + +/* this file is part of ehci-hcd.c */ + + +/* 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; + + ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); + nports = HCS_N_PORTS(ehci->hcs_params); + + 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; +} + +/* + * 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; + + 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); + +static inline int create_sysfs_files(struct ehci_hcd *ehci) +{ + int i = 0; + + /* 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; +} + +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); +} |