[mirror_ubuntu-bionic-kernel.git] / include / linux / mbus.h

/*
 * Marvell MBUS common definitions.
 *
 * Copyright (C) 2008 Marvell Semiconductor
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#ifndef __LINUX_MBUS_H
#define __LINUX_MBUS_H

struct mbus_dram_target_info
{
	/*
	 * The 4-bit MBUS target ID of the DRAM controller.
	 */
	u8		mbus_dram_target_id;

	/*
	 * The base address, size, and MBUS attribute ID for each
	 * of the possible DRAM chip selects.  Peripherals are
	 * required to support at least 4 decode windows.
	 */
	int		num_cs;
	struct mbus_dram_window {
		u8	cs_index;
		u8	mbus_attr;
		u32	base;
		u32	size;
	} cs[4];
};

/* Flags for PCI/PCIe address decoding regions */
#define MVEBU_MBUS_PCI_IO  0x1
#define MVEBU_MBUS_PCI_MEM 0x2
#define MVEBU_MBUS_PCI_WA  0x3

/*
 * Magic value that explicits that we don't need a remapping-capable
 * address decoding window.
 */
#define MVEBU_MBUS_NO_REMAP (0xffffffff)

/* Maximum size of a mbus window name */
#define MVEBU_MBUS_MAX_WINNAME_SZ 32

/*
 * The Marvell mbus is to be found only on SOCs from the Orion family
 * at the moment.  Provide a dummy stub for other architectures.
 */
#ifdef CONFIG_PLAT_ORION
extern const struct mbus_dram_target_info *mv_mbus_dram_info(void);
#else
static inline const struct mbus_dram_target_info *mv_mbus_dram_info(void)
{
	return NULL;
}
#endif

int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base,
				      size_t size, phys_addr_t remap,
				      unsigned int flags);
int mvebu_mbus_add_window(const char *devname, phys_addr_t base,
			  size_t size);
int mvebu_mbus_del_window(phys_addr_t base, size_t size);
int mvebu_mbus_init(const char *soc, phys_addr_t mbus_phys_base,
		    size_t mbus_size, phys_addr_t sdram_phys_base,
		    size_t sdram_size);

#endif /* __LINUX_MBUS_H */
Commit	Line	Data
abc848c1 LB	1	/*
	2	* Marvell MBUS common definitions.
	3	*
	4	* Copyright (C) 2008 Marvell Semiconductor
	5	*
	6	* This file is licensed under the terms of the GNU General Public
	7	* License version 2. This program is licensed "as is" without any
	8	* warranty of any kind, whether express or implied.
	9	*/
	10
	11	#ifndef __LINUX_MBUS_H
	12	#define __LINUX_MBUS_H
	13
	14	struct mbus_dram_target_info
	15	{
	16	/*
	17	* The 4-bit MBUS target ID of the DRAM controller.
	18	*/
	19	u8 mbus_dram_target_id;
	20
	21	/*
	22	* The base address, size, and MBUS attribute ID for each
	23	* of the possible DRAM chip selects. Peripherals are
	24	* required to support at least 4 decode windows.
	25	*/
	26	int num_cs;
	27	struct mbus_dram_window {
	28	u8 cs_index;
	29	u8 mbus_attr;
	30	u32 base;
	31	u32 size;
	32	} cs[4];
	33	};
	34
fddddb52 TP	35	/* Flags for PCI/PCIe address decoding regions */
	36	#define MVEBU_MBUS_PCI_IO 0x1
	37	#define MVEBU_MBUS_PCI_MEM 0x2
	38	#define MVEBU_MBUS_PCI_WA 0x3
	39
	40	/*
	41	* Magic value that explicits that we don't need a remapping-capable
	42	* address decoding window.
	43	*/
	44	#define MVEBU_MBUS_NO_REMAP (0xffffffff)
	45
95b80e0a TP	46	/* Maximum size of a mbus window name */
	47	#define MVEBU_MBUS_MAX_WINNAME_SZ 32
	48
63a9332b AL	49	/*
	50	* The Marvell mbus is to be found only on SOCs from the Orion family
	51	* at the moment. Provide a dummy stub for other architectures.
	52	*/
	53	#ifdef CONFIG_PLAT_ORION
	54	extern const struct mbus_dram_target_info *mv_mbus_dram_info(void);
	55	#else
	56	static inline const struct mbus_dram_target_info *mv_mbus_dram_info(void)
	57	{
	58	return NULL;
	59	}
	60	#endif
fddddb52 TP	61
	62	int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base,
	63	size_t size, phys_addr_t remap,
	64	unsigned int flags);
	65	int mvebu_mbus_add_window(const char *devname, phys_addr_t base,
	66	size_t size);
	67	int mvebu_mbus_del_window(phys_addr_t base, size_t size);
	68	int mvebu_mbus_init(const char *soc, phys_addr_t mbus_phys_base,
	69	size_t mbus_size, phys_addr_t sdram_phys_base,
	70	size_t sdram_size);
	71
	72	#endif /* __LINUX_MBUS_H */