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Diffstat (limited to 'arch/arm/plat-mxc/include/mach/spba.h')
-rw-r--r-- | arch/arm/plat-mxc/include/mach/spba.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/include/mach/spba.h b/arch/arm/plat-mxc/include/mach/spba.h new file mode 100644 index 000000000000..8d018be8a0b7 --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/spba.h @@ -0,0 +1,66 @@ + +/* + * Copyright 2004-2008 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/*! + * @defgroup SPBA Shared Peripheral Bus Arbiter (SPBA) + * @ingroup MSL_MX31 MSL_MX35 MSL_MX37 MSL_MX51 MSL_MXC91321 + */ + +/*! + * @file arch-mxc/spba.h + * @brief This file contains the Shared Peripheral Bus Arbiter (spba) API. + * + * @ingroup SPBA + */ + +#ifndef __ASM_ARCH_MXC_SPBA_H__ +#define __ASM_ARCH_MXC_SPBA_H__ + +#ifdef __KERNEL__ + +#define MXC_SPBA_RAR_MASK 0x7 + +/*! + * Defines three SPBA masters: A - ARM, C - SDMA (no master B for MX31) + */ +enum spba_masters { + SPBA_MASTER_A = 1, + SPBA_MASTER_B = 2, + SPBA_MASTER_C = 4, +}; + +/*! + * This function allows the three masters (A, B, C) to take ownership of a + * shared peripheral. + * + * @param mod specified module as defined in \b enum \b #spba_module + * @param master one of more (or-ed together) masters as defined in \b enum \b #spba_masters + * + * @return 0 if successful; -1 otherwise. + */ +int spba_take_ownership(int mod, int master); + +/*! + * This function releases the ownership for a shared peripheral. + * + * @param mod specified module as defined in \b enum \b #spba_module + * @param master one of more (or-ed together) masters as defined in \b enum \b #spba_masters + * + * @return 0 if successful; -1 otherwise. + */ +int spba_rel_ownership(int mod, int master); + +#endif /* __KERNEL__ */ + +#endif /* __ASM_ARCH_MXC_SPBA_H__ */ |