xref: /openbmc/linux/include/linux/spi/mxs-spi.h (revision c942fddf)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * include/linux/spi/mxs-spi.h
4  *
5  * Freescale i.MX233/i.MX28 SPI controller register definition
6  *
7  * Copyright 2008 Embedded Alley Solutions, Inc.
8  * Copyright 2009-2011 Freescale Semiconductor, Inc.
9  */
10 
11 #ifndef __LINUX_SPI_MXS_SPI_H__
12 #define __LINUX_SPI_MXS_SPI_H__
13 
14 #include <linux/dmaengine.h>
15 
16 #define ssp_is_old(host)	((host)->devid == IMX23_SSP)
17 
18 /* SSP registers */
19 #define HW_SSP_CTRL0				0x000
20 #define  BM_SSP_CTRL0_RUN			(1 << 29)
21 #define  BM_SSP_CTRL0_SDIO_IRQ_CHECK		(1 << 28)
22 #define  BM_SSP_CTRL0_LOCK_CS			(1 << 27)
23 #define  BM_SSP_CTRL0_IGNORE_CRC		(1 << 26)
24 #define  BM_SSP_CTRL0_READ			(1 << 25)
25 #define  BM_SSP_CTRL0_DATA_XFER			(1 << 24)
26 #define  BP_SSP_CTRL0_BUS_WIDTH			22
27 #define  BM_SSP_CTRL0_BUS_WIDTH			(0x3 << 22)
28 #define  BM_SSP_CTRL0_WAIT_FOR_IRQ		(1 << 21)
29 #define  BM_SSP_CTRL0_WAIT_FOR_CMD		(1 << 20)
30 #define  BM_SSP_CTRL0_LONG_RESP			(1 << 19)
31 #define  BM_SSP_CTRL0_GET_RESP			(1 << 17)
32 #define  BM_SSP_CTRL0_ENABLE			(1 << 16)
33 #define  BP_SSP_CTRL0_XFER_COUNT		0
34 #define  BM_SSP_CTRL0_XFER_COUNT		0xffff
35 #define HW_SSP_CMD0				0x010
36 #define  BM_SSP_CMD0_DBL_DATA_RATE_EN		(1 << 25)
37 #define  BM_SSP_CMD0_SLOW_CLKING_EN		(1 << 22)
38 #define  BM_SSP_CMD0_CONT_CLKING_EN		(1 << 21)
39 #define  BM_SSP_CMD0_APPEND_8CYC		(1 << 20)
40 #define  BP_SSP_CMD0_BLOCK_SIZE			16
41 #define  BM_SSP_CMD0_BLOCK_SIZE			(0xf << 16)
42 #define  BP_SSP_CMD0_BLOCK_COUNT		8
43 #define  BM_SSP_CMD0_BLOCK_COUNT		(0xff << 8)
44 #define  BP_SSP_CMD0_CMD			0
45 #define  BM_SSP_CMD0_CMD			0xff
46 #define HW_SSP_CMD1				0x020
47 #define HW_SSP_XFER_SIZE			0x030
48 #define HW_SSP_BLOCK_SIZE			0x040
49 #define  BP_SSP_BLOCK_SIZE_BLOCK_COUNT		4
50 #define  BM_SSP_BLOCK_SIZE_BLOCK_COUNT		(0xffffff << 4)
51 #define  BP_SSP_BLOCK_SIZE_BLOCK_SIZE		0
52 #define  BM_SSP_BLOCK_SIZE_BLOCK_SIZE		0xf
53 #define HW_SSP_TIMING(h)			(ssp_is_old(h) ? 0x050 : 0x070)
54 #define  BP_SSP_TIMING_TIMEOUT			16
55 #define  BM_SSP_TIMING_TIMEOUT			(0xffff << 16)
56 #define  BP_SSP_TIMING_CLOCK_DIVIDE		8
57 #define  BM_SSP_TIMING_CLOCK_DIVIDE		(0xff << 8)
58 #define  BF_SSP_TIMING_CLOCK_DIVIDE(v)		\
59 			(((v) << 8) & BM_SSP_TIMING_CLOCK_DIVIDE)
60 #define  BP_SSP_TIMING_CLOCK_RATE		0
61 #define  BM_SSP_TIMING_CLOCK_RATE		0xff
62 #define BF_SSP_TIMING_CLOCK_RATE(v)		\
63 			(((v) << 0) & BM_SSP_TIMING_CLOCK_RATE)
64 #define HW_SSP_CTRL1(h)				(ssp_is_old(h) ? 0x060 : 0x080)
65 #define  BM_SSP_CTRL1_SDIO_IRQ			(1 << 31)
66 #define  BM_SSP_CTRL1_SDIO_IRQ_EN		(1 << 30)
67 #define  BM_SSP_CTRL1_RESP_ERR_IRQ		(1 << 29)
68 #define  BM_SSP_CTRL1_RESP_ERR_IRQ_EN		(1 << 28)
69 #define  BM_SSP_CTRL1_RESP_TIMEOUT_IRQ		(1 << 27)
70 #define  BM_SSP_CTRL1_RESP_TIMEOUT_IRQ_EN	(1 << 26)
71 #define  BM_SSP_CTRL1_DATA_TIMEOUT_IRQ		(1 << 25)
72 #define  BM_SSP_CTRL1_DATA_TIMEOUT_IRQ_EN	(1 << 24)
73 #define  BM_SSP_CTRL1_DATA_CRC_IRQ		(1 << 23)
74 #define  BM_SSP_CTRL1_DATA_CRC_IRQ_EN		(1 << 22)
75 #define  BM_SSP_CTRL1_FIFO_UNDERRUN_IRQ		(1 << 21)
76 #define  BM_SSP_CTRL1_FIFO_UNDERRUN_IRQ_EN	(1 << 20)
77 #define  BM_SSP_CTRL1_RECV_TIMEOUT_IRQ		(1 << 17)
78 #define  BM_SSP_CTRL1_RECV_TIMEOUT_IRQ_EN	(1 << 16)
79 #define  BM_SSP_CTRL1_FIFO_OVERRUN_IRQ		(1 << 15)
80 #define  BM_SSP_CTRL1_FIFO_OVERRUN_IRQ_EN	(1 << 14)
81 #define  BM_SSP_CTRL1_DMA_ENABLE		(1 << 13)
82 #define  BM_SSP_CTRL1_PHASE			(1 << 10)
83 #define  BM_SSP_CTRL1_POLARITY			(1 << 9)
84 #define  BP_SSP_CTRL1_WORD_LENGTH		4
85 #define  BM_SSP_CTRL1_WORD_LENGTH		(0xf << 4)
86 #define  BF_SSP_CTRL1_WORD_LENGTH(v)		\
87 			(((v) << 4) & BM_SSP_CTRL1_WORD_LENGTH)
88 #define  BV_SSP_CTRL1_WORD_LENGTH__FOUR_BITS	0x3
89 #define  BV_SSP_CTRL1_WORD_LENGTH__EIGHT_BITS	0x7
90 #define  BV_SSP_CTRL1_WORD_LENGTH__SIXTEEN_BITS	0xF
91 #define  BP_SSP_CTRL1_SSP_MODE			0
92 #define  BM_SSP_CTRL1_SSP_MODE			0xf
93 #define  BF_SSP_CTRL1_SSP_MODE(v)		\
94 			(((v) << 0) & BM_SSP_CTRL1_SSP_MODE)
95 #define  BV_SSP_CTRL1_SSP_MODE__SPI		0x0
96 #define  BV_SSP_CTRL1_SSP_MODE__SSI		0x1
97 #define  BV_SSP_CTRL1_SSP_MODE__SD_MMC		0x3
98 #define  BV_SSP_CTRL1_SSP_MODE__MS		0x4
99 
100 #define HW_SSP_DATA(h)				(ssp_is_old(h) ? 0x070 : 0x090)
101 
102 #define HW_SSP_SDRESP0(h)			(ssp_is_old(h) ? 0x080 : 0x0a0)
103 #define HW_SSP_SDRESP1(h)			(ssp_is_old(h) ? 0x090 : 0x0b0)
104 #define HW_SSP_SDRESP2(h)			(ssp_is_old(h) ? 0x0a0 : 0x0c0)
105 #define HW_SSP_SDRESP3(h)			(ssp_is_old(h) ? 0x0b0 : 0x0d0)
106 #define HW_SSP_STATUS(h)			(ssp_is_old(h) ? 0x0c0 : 0x100)
107 #define  BM_SSP_STATUS_CARD_DETECT		(1 << 28)
108 #define  BM_SSP_STATUS_SDIO_IRQ			(1 << 17)
109 #define  BM_SSP_STATUS_FIFO_EMPTY		(1 << 5)
110 
111 #define BF_SSP(value, field)	(((value) << BP_SSP_##field) & BM_SSP_##field)
112 
113 #define SSP_PIO_NUM	3
114 
115 enum mxs_ssp_id {
116 	IMX23_SSP,
117 	IMX28_SSP,
118 };
119 
120 struct mxs_ssp {
121 	struct device			*dev;
122 	void __iomem			*base;
123 	struct clk			*clk;
124 	unsigned int			clk_rate;
125 	enum mxs_ssp_id			devid;
126 
127 	struct dma_chan			*dmach;
128 	unsigned int			dma_dir;
129 	enum dma_transfer_direction	slave_dirn;
130 	u32				ssp_pio_words[SSP_PIO_NUM];
131 };
132 
133 void mxs_ssp_set_clk_rate(struct mxs_ssp *ssp, unsigned int rate);
134 
135 #endif	/* __LINUX_SPI_MXS_SPI_H__ */
136