xref: /openbmc/linux/drivers/spi/spi-fsl-spi.h (revision 2874c5fd)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Freescale SPI controller driver.
4  *
5  * Maintainer: Kumar Gala
6  *
7  * Copyright (C) 2006 Polycom, Inc.
8  * Copyright 2010 Freescale Semiconductor, Inc.
9  *
10  * CPM SPI and QE buffer descriptors mode support:
11  * Copyright (c) 2009  MontaVista Software, Inc.
12  * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
13  *
14  * GRLIB support:
15  * Copyright (c) 2012 Aeroflex Gaisler AB.
16  * Author: Andreas Larsson <andreas@gaisler.com>
17  */
18 
19 #ifndef __SPI_FSL_SPI_H__
20 #define __SPI_FSL_SPI_H__
21 
22 /* SPI Controller registers */
23 struct fsl_spi_reg {
24 	__be32 cap; /* TYPE_GRLIB specific */
25 	u8 res1[0x1C];
26 	__be32 mode;
27 	__be32 event;
28 	__be32 mask;
29 	__be32 command;
30 	__be32 transmit;
31 	__be32 receive;
32 	__be32 slvsel; /* TYPE_GRLIB specific */
33 };
34 
35 /* SPI Controller mode register definitions */
36 #define	SPMODE_LOOP		(1 << 30)
37 #define	SPMODE_CI_INACTIVEHIGH	(1 << 29)
38 #define	SPMODE_CP_BEGIN_EDGECLK	(1 << 28)
39 #define	SPMODE_DIV16		(1 << 27)
40 #define	SPMODE_REV		(1 << 26)
41 #define	SPMODE_MS		(1 << 25)
42 #define	SPMODE_ENABLE		(1 << 24)
43 #define	SPMODE_LEN(x)		((x) << 20)
44 #define	SPMODE_PM(x)		((x) << 16)
45 #define	SPMODE_OP		(1 << 14)
46 #define	SPMODE_CG(x)		((x) << 7)
47 
48 /* TYPE_GRLIB SPI Controller capability register definitions */
49 #define SPCAP_SSEN(x)		(((x) >> 16) & 0x1)
50 #define SPCAP_SSSZ(x)		(((x) >> 24) & 0xff)
51 #define SPCAP_MAXWLEN(x)	(((x) >> 20) & 0xf)
52 
53 /*
54  * Default for SPI Mode:
55  *	SPI MODE 0 (inactive low, phase middle, MSB, 8-bit length, slow clk
56  */
57 #define	SPMODE_INIT_VAL (SPMODE_CI_INACTIVEHIGH | SPMODE_DIV16 | SPMODE_REV | \
58 			 SPMODE_MS | SPMODE_LEN(7) | SPMODE_PM(0xf))
59 
60 /* SPIE register values */
61 #define	SPIE_NE		0x00000200	/* Not empty */
62 #define	SPIE_NF		0x00000100	/* Not full */
63 
64 /* SPIM register values */
65 #define	SPIM_NE		0x00000200	/* Not empty */
66 #define	SPIM_NF		0x00000100	/* Not full */
67 
68 #endif /* __SPI_FSL_SPI_H__ */
69