diff options
author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-06-24 08:41:41 -0400 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-06-24 13:07:53 -0400 |
commit | 816724e65c72a90a44fbad0ef0b59b186c85fa90 (patch) | |
tree | 421fa29aedff988e392f92780637553e275d37a0 /arch/arm/mach-netx/pfifo.c | |
parent | 70ac4385a13f78bc478f26d317511893741b05bd (diff) | |
parent | d384ea691fe4ea8c2dd5b9b8d9042eb181776f18 (diff) |
Merge branch 'master' of /home/trondmy/kernel/linux-2.6/
Conflicts:
fs/nfs/inode.c
fs/super.c
Fix conflicts between patch 'NFS: Split fs/nfs/inode.c' and patch
'VFS: Permit filesystem to override root dentry on mount'
Diffstat (limited to 'arch/arm/mach-netx/pfifo.c')
-rw-r--r-- | arch/arm/mach-netx/pfifo.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/arm/mach-netx/pfifo.c b/arch/arm/mach-netx/pfifo.c new file mode 100644 index 000000000000..44dea61a9de4 --- /dev/null +++ b/arch/arm/mach-netx/pfifo.c @@ -0,0 +1,68 @@ +/* + * arch/arm/mach-netx/pfifo.c + * + * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mutex.h> + +#include <asm/io.h> +#include <asm/hardware.h> +#include <asm/arch/netx-regs.h> +#include <asm/arch/pfifo.h> + +static DEFINE_MUTEX(pfifo_lock); + +static unsigned int pfifo_used = 0; + +int pfifo_request(unsigned int pfifo_mask) +{ + int err = 0; + unsigned int val; + + mutex_lock(&pfifo_lock); + + if (pfifo_mask & pfifo_used) { + err = -EBUSY; + goto out; + } + + pfifo_used |= pfifo_mask; + + val = readl(NETX_PFIFO_RESET); + writel(val | pfifo_mask, NETX_PFIFO_RESET); + writel(val, NETX_PFIFO_RESET); + +out: + mutex_unlock(&pfifo_lock); + return err; +} + +void pfifo_free(unsigned int pfifo_mask) +{ + mutex_lock(&pfifo_lock); + pfifo_used &= ~pfifo_mask; + mutex_unlock(&pfifo_lock); +} + +EXPORT_SYMBOL(pfifo_push); +EXPORT_SYMBOL(pfifo_pop); +EXPORT_SYMBOL(pfifo_fill_level); +EXPORT_SYMBOL(pfifo_empty); +EXPORT_SYMBOL(pfifo_request); +EXPORT_SYMBOL(pfifo_free); |