tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Analog Devices SPI3 controller driver
3 *
4 * Copyright (c) 2011 Analog Devices Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20#ifndef _SPI_CHANNEL_H_
21#define _SPI_CHANNEL_H_
22
23#include <linux/types.h>
24
25/* SPI_CONTROL */
26#define SPI_CTL_EN 0x00000001 /* Enable */
27#define SPI_CTL_MSTR 0x00000002 /* Master/Slave */
28#define SPI_CTL_PSSE 0x00000004 /* controls modf error in master mode */
29#define SPI_CTL_ODM 0x00000008 /* Open Drain Mode */
30#define SPI_CTL_CPHA 0x00000010 /* Clock Phase */
31#define SPI_CTL_CPOL 0x00000020 /* Clock Polarity */
32#define SPI_CTL_ASSEL 0x00000040 /* Slave Select Pin Control */
33#define SPI_CTL_SELST 0x00000080 /* Slave Select Polarity in-between transfers */
34#define SPI_CTL_EMISO 0x00000100 /* Enable MISO */
35#define SPI_CTL_SIZE 0x00000600 /* Word Transfer Size */
36#define SPI_CTL_SIZE08 0x00000000 /* SIZE: 8 bits */
37#define SPI_CTL_SIZE16 0x00000200 /* SIZE: 16 bits */
38#define SPI_CTL_SIZE32 0x00000400 /* SIZE: 32 bits */
39#define SPI_CTL_LSBF 0x00001000 /* LSB First */
40#define SPI_CTL_FCEN 0x00002000 /* Flow-Control Enable */
41#define SPI_CTL_FCCH 0x00004000 /* Flow-Control Channel Selection */
42#define SPI_CTL_FCPL 0x00008000 /* Flow-Control Polarity */
43#define SPI_CTL_FCWM 0x00030000 /* Flow-Control Water-Mark */
44#define SPI_CTL_FIFO0 0x00000000 /* FCWM: TFIFO empty or RFIFO Full */
45#define SPI_CTL_FIFO1 0x00010000 /* FCWM: TFIFO 75% or more empty or RFIFO 75% or more full */
46#define SPI_CTL_FIFO2 0x00020000 /* FCWM: TFIFO 50% or more empty or RFIFO 50% or more full */
47#define SPI_CTL_FMODE 0x00040000 /* Fast-mode Enable */
48#define SPI_CTL_MIOM 0x00300000 /* Multiple I/O Mode */
49#define SPI_CTL_MIO_DIS 0x00000000 /* MIOM: Disable */
50#define SPI_CTL_MIO_DUAL 0x00100000 /* MIOM: Enable DIOM (Dual I/O Mode) */
51#define SPI_CTL_MIO_QUAD 0x00200000 /* MIOM: Enable QUAD (Quad SPI Mode) */
52#define SPI_CTL_SOSI 0x00400000 /* Start on MOSI */
53/* SPI_RX_CONTROL */
54#define SPI_RXCTL_REN 0x00000001 /* Receive Channel Enable */
55#define SPI_RXCTL_RTI 0x00000004 /* Receive Transfer Initiate */
56#define SPI_RXCTL_RWCEN 0x00000008 /* Receive Word Counter Enable */
57#define SPI_RXCTL_RDR 0x00000070 /* Receive Data Request */
58#define SPI_RXCTL_RDR_DIS 0x00000000 /* RDR: Disabled */
59#define SPI_RXCTL_RDR_NE 0x00000010 /* RDR: RFIFO not empty */
60#define SPI_RXCTL_RDR_25 0x00000020 /* RDR: RFIFO 25% full */
61#define SPI_RXCTL_RDR_50 0x00000030 /* RDR: RFIFO 50% full */
62#define SPI_RXCTL_RDR_75 0x00000040 /* RDR: RFIFO 75% full */
63#define SPI_RXCTL_RDR_FULL 0x00000050 /* RDR: RFIFO full */
64#define SPI_RXCTL_RDO 0x00000100 /* Receive Data Over-Run */
65#define SPI_RXCTL_RRWM 0x00003000 /* FIFO Regular Water-Mark */
66#define SPI_RXCTL_RWM_0 0x00000000 /* RRWM: RFIFO Empty */
67#define SPI_RXCTL_RWM_25 0x00001000 /* RRWM: RFIFO 25% full */
68#define SPI_RXCTL_RWM_50 0x00002000 /* RRWM: RFIFO 50% full */
69#define SPI_RXCTL_RWM_75 0x00003000 /* RRWM: RFIFO 75% full */
70#define SPI_RXCTL_RUWM 0x00070000 /* FIFO Urgent Water-Mark */
71#define SPI_RXCTL_UWM_DIS 0x00000000 /* RUWM: Disabled */
72#define SPI_RXCTL_UWM_25 0x00010000 /* RUWM: RFIFO 25% full */
73#define SPI_RXCTL_UWM_50 0x00020000 /* RUWM: RFIFO 50% full */
74#define SPI_RXCTL_UWM_75 0x00030000 /* RUWM: RFIFO 75% full */
75#define SPI_RXCTL_UWM_FULL 0x00040000 /* RUWM: RFIFO full */
76/* SPI_TX_CONTROL */
77#define SPI_TXCTL_TEN 0x00000001 /* Transmit Channel Enable */
78#define SPI_TXCTL_TTI 0x00000004 /* Transmit Transfer Initiate */
79#define SPI_TXCTL_TWCEN 0x00000008 /* Transmit Word Counter Enable */
80#define SPI_TXCTL_TDR 0x00000070 /* Transmit Data Request */
81#define SPI_TXCTL_TDR_DIS 0x00000000 /* TDR: Disabled */
82#define SPI_TXCTL_TDR_NF 0x00000010 /* TDR: TFIFO not full */
83#define SPI_TXCTL_TDR_25 0x00000020 /* TDR: TFIFO 25% empty */
84#define SPI_TXCTL_TDR_50 0x00000030 /* TDR: TFIFO 50% empty */
85#define SPI_TXCTL_TDR_75 0x00000040 /* TDR: TFIFO 75% empty */
86#define SPI_TXCTL_TDR_EMPTY 0x00000050 /* TDR: TFIFO empty */
87#define SPI_TXCTL_TDU 0x00000100 /* Transmit Data Under-Run */
88#define SPI_TXCTL_TRWM 0x00003000 /* FIFO Regular Water-Mark */
89#define SPI_TXCTL_RWM_FULL 0x00000000 /* TRWM: TFIFO full */
90#define SPI_TXCTL_RWM_25 0x00001000 /* TRWM: TFIFO 25% empty */
91#define SPI_TXCTL_RWM_50 0x00002000 /* TRWM: TFIFO 50% empty */
92#define SPI_TXCTL_RWM_75 0x00003000 /* TRWM: TFIFO 75% empty */
93#define SPI_TXCTL_TUWM 0x00070000 /* FIFO Urgent Water-Mark */
94#define SPI_TXCTL_UWM_DIS 0x00000000 /* TUWM: Disabled */
95#define SPI_TXCTL_UWM_25 0x00010000 /* TUWM: TFIFO 25% empty */
96#define SPI_TXCTL_UWM_50 0x00020000 /* TUWM: TFIFO 50% empty */
97#define SPI_TXCTL_UWM_75 0x00030000 /* TUWM: TFIFO 75% empty */
98#define SPI_TXCTL_UWM_EMPTY 0x00040000 /* TUWM: TFIFO empty */
99/* SPI_CLOCK */
100#define SPI_CLK_BAUD 0x0000FFFF /* Baud Rate */
101/* SPI_DELAY */
102#define SPI_DLY_STOP 0x000000FF /* Transfer delay time in multiples of SCK period */
103#define SPI_DLY_LEADX 0x00000100 /* Extended (1 SCK) LEAD Control */
104#define SPI_DLY_LAGX 0x00000200 /* Extended (1 SCK) LAG control */
105/* SPI_SSEL */
106#define SPI_SLVSEL_SSE1 0x00000002 /* SPISSEL1 Enable */
107#define SPI_SLVSEL_SSE2 0x00000004 /* SPISSEL2 Enable */
108#define SPI_SLVSEL_SSE3 0x00000008 /* SPISSEL3 Enable */
109#define SPI_SLVSEL_SSE4 0x00000010 /* SPISSEL4 Enable */
110#define SPI_SLVSEL_SSE5 0x00000020 /* SPISSEL5 Enable */
111#define SPI_SLVSEL_SSE6 0x00000040 /* SPISSEL6 Enable */
112#define SPI_SLVSEL_SSE7 0x00000080 /* SPISSEL7 Enable */
113#define SPI_SLVSEL_SSEL1 0x00000200 /* SPISSEL1 Value */
114#define SPI_SLVSEL_SSEL2 0x00000400 /* SPISSEL2 Value */
115#define SPI_SLVSEL_SSEL3 0x00000800 /* SPISSEL3 Value */
116#define SPI_SLVSEL_SSEL4 0x00001000 /* SPISSEL4 Value */
117#define SPI_SLVSEL_SSEL5 0x00002000 /* SPISSEL5 Value */
118#define SPI_SLVSEL_SSEL6 0x00004000 /* SPISSEL6 Value */
119#define SPI_SLVSEL_SSEL7 0x00008000 /* SPISSEL7 Value */
120/* SPI_RWC */
121#define SPI_RWC_VALUE 0x0000FFFF /* Received Word-Count */
122/* SPI_RWCR */
123#define SPI_RWCR_VALUE 0x0000FFFF /* Received Word-Count Reload */
124/* SPI_TWC */
125#define SPI_TWC_VALUE 0x0000FFFF /* Transmitted Word-Count */
126/* SPI_TWCR */
127#define SPI_TWCR_VALUE 0x0000FFFF /* Transmitted Word-Count Reload */
128/* SPI_IMASK */
129#define SPI_IMSK_RUWM 0x00000002 /* Receive Urgent Water-Mark Interrupt Mask */
130#define SPI_IMSK_TUWM 0x00000004 /* Transmit Urgent Water-Mark Interrupt Mask */
131#define SPI_IMSK_ROM 0x00000010 /* Receive Over-Run Error Interrupt Mask */
132#define SPI_IMSK_TUM 0x00000020 /* Transmit Under-Run Error Interrupt Mask */
133#define SPI_IMSK_TCM 0x00000040 /* Transmit Collision Error Interrupt Mask */
134#define SPI_IMSK_MFM 0x00000080 /* Mode Fault Error Interrupt Mask */
135#define SPI_IMSK_RSM 0x00000100 /* Receive Start Interrupt Mask */
136#define SPI_IMSK_TSM 0x00000200 /* Transmit Start Interrupt Mask */
137#define SPI_IMSK_RFM 0x00000400 /* Receive Finish Interrupt Mask */
138#define SPI_IMSK_TFM 0x00000800 /* Transmit Finish Interrupt Mask */
139/* SPI_IMASKCL */
140#define SPI_IMSK_CLR_RUW 0x00000002 /* Receive Urgent Water-Mark Interrupt Mask */
141#define SPI_IMSK_CLR_TUWM 0x00000004 /* Transmit Urgent Water-Mark Interrupt Mask */
142#define SPI_IMSK_CLR_ROM 0x00000010 /* Receive Over-Run Error Interrupt Mask */
143#define SPI_IMSK_CLR_TUM 0x00000020 /* Transmit Under-Run Error Interrupt Mask */
144#define SPI_IMSK_CLR_TCM 0x00000040 /* Transmit Collision Error Interrupt Mask */
145#define SPI_IMSK_CLR_MFM 0x00000080 /* Mode Fault Error Interrupt Mask */
146#define SPI_IMSK_CLR_RSM 0x00000100 /* Receive Start Interrupt Mask */
147#define SPI_IMSK_CLR_TSM 0x00000200 /* Transmit Start Interrupt Mask */
148#define SPI_IMSK_CLR_RFM 0x00000400 /* Receive Finish Interrupt Mask */
149#define SPI_IMSK_CLR_TFM 0x00000800 /* Transmit Finish Interrupt Mask */
150/* SPI_IMASKST */
151#define SPI_IMSK_SET_RUWM 0x00000002 /* Receive Urgent Water-Mark Interrupt Mask */
152#define SPI_IMSK_SET_TUWM 0x00000004 /* Transmit Urgent Water-Mark Interrupt Mask */
153#define SPI_IMSK_SET_ROM 0x00000010 /* Receive Over-Run Error Interrupt Mask */
154#define SPI_IMSK_SET_TUM 0x00000020 /* Transmit Under-Run Error Interrupt Mask */
155#define SPI_IMSK_SET_TCM 0x00000040 /* Transmit Collision Error Interrupt Mask */
156#define SPI_IMSK_SET_MFM 0x00000080 /* Mode Fault Error Interrupt Mask */
157#define SPI_IMSK_SET_RSM 0x00000100 /* Receive Start Interrupt Mask */
158#define SPI_IMSK_SET_TSM 0x00000200 /* Transmit Start Interrupt Mask */
159#define SPI_IMSK_SET_RFM 0x00000400 /* Receive Finish Interrupt Mask */
160#define SPI_IMSK_SET_TFM 0x00000800 /* Transmit Finish Interrupt Mask */
161/* SPI_STATUS */
162#define SPI_STAT_SPIF 0x00000001 /* SPI Finished */
163#define SPI_STAT_RUWM 0x00000002 /* Receive Urgent Water-Mark Breached */
164#define SPI_STAT_TUWM 0x00000004 /* Transmit Urgent Water-Mark Breached */
165#define SPI_STAT_ROE 0x00000010 /* Receive Over-Run Error Indication */
166#define SPI_STAT_TUE 0x00000020 /* Transmit Under-Run Error Indication */
167#define SPI_STAT_TCE 0x00000040 /* Transmit Collision Error Indication */
168#define SPI_STAT_MODF 0x00000080 /* Mode Fault Error Indication */
169#define SPI_STAT_RS 0x00000100 /* Receive Start Indication */
170#define SPI_STAT_TS 0x00000200 /* Transmit Start Indication */
171#define SPI_STAT_RF 0x00000400 /* Receive Finish Indication */
172#define SPI_STAT_TF 0x00000800 /* Transmit Finish Indication */
173#define SPI_STAT_RFS 0x00007000 /* SPI_RFIFO status */
174#define SPI_STAT_RFIFO_EMPTY 0x00000000 /* RFS: RFIFO Empty */
175#define SPI_STAT_RFIFO_25 0x00001000 /* RFS: RFIFO 25% Full */
176#define SPI_STAT_RFIFO_50 0x00002000 /* RFS: RFIFO 50% Full */
177#define SPI_STAT_RFIFO_75 0x00003000 /* RFS: RFIFO 75% Full */
178#define SPI_STAT_RFIFO_FULL 0x00004000 /* RFS: RFIFO Full */
179#define SPI_STAT_TFS 0x00070000 /* SPI_TFIFO status */
180#define SPI_STAT_TFIFO_FULL 0x00000000 /* TFS: TFIFO full */
181#define SPI_STAT_TFIFO_25 0x00010000 /* TFS: TFIFO 25% empty */
182#define SPI_STAT_TFIFO_50 0x00020000 /* TFS: TFIFO 50% empty */
183#define SPI_STAT_TFIFO_75 0x00030000 /* TFS: TFIFO 75% empty */
184#define SPI_STAT_TFIFO_EMPTY 0x00040000 /* TFS: TFIFO empty */
185#define SPI_STAT_FCS 0x00100000 /* Flow-Control Stall Indication */
186#define SPI_STAT_RFE 0x00400000 /* SPI_RFIFO Empty */
187#define SPI_STAT_TFF 0x00800000 /* SPI_TFIFO Full */
188/* SPI_ILAT */
189#define SPI_ILAT_RUWMI 0x00000002 /* Receive Urgent Water Mark Interrupt */
190#define SPI_ILAT_TUWMI 0x00000004 /* Transmit Urgent Water Mark Interrupt */
191#define SPI_ILAT_ROI 0x00000010 /* Receive Over-Run Error Indication */
192#define SPI_ILAT_TUI 0x00000020 /* Transmit Under-Run Error Indication */
193#define SPI_ILAT_TCI 0x00000040 /* Transmit Collision Error Indication */
194#define SPI_ILAT_MFI 0x00000080 /* Mode Fault Error Indication */
195#define SPI_ILAT_RSI 0x00000100 /* Receive Start Indication */
196#define SPI_ILAT_TSI 0x00000200 /* Transmit Start Indication */
197#define SPI_ILAT_RFI 0x00000400 /* Receive Finish Indication */
198#define SPI_ILAT_TFI 0x00000800 /* Transmit Finish Indication */
199/* SPI_ILATCL */
200#define SPI_ILAT_CLR_RUWMI 0x00000002 /* Receive Urgent Water Mark Interrupt */
201#define SPI_ILAT_CLR_TUWMI 0x00000004 /* Transmit Urgent Water Mark Interrupt */
202#define SPI_ILAT_CLR_ROI 0x00000010 /* Receive Over-Run Error Indication */
203#define SPI_ILAT_CLR_TUI 0x00000020 /* Transmit Under-Run Error Indication */
204#define SPI_ILAT_CLR_TCI 0x00000040 /* Transmit Collision Error Indication */
205#define SPI_ILAT_CLR_MFI 0x00000080 /* Mode Fault Error Indication */
206#define SPI_ILAT_CLR_RSI 0x00000100 /* Receive Start Indication */
207#define SPI_ILAT_CLR_TSI 0x00000200 /* Transmit Start Indication */
208#define SPI_ILAT_CLR_RFI 0x00000400 /* Receive Finish Indication */
209#define SPI_ILAT_CLR_TFI 0x00000800 /* Transmit Finish Indication */
210
211/*
212 * bfin spi3 registers layout
213 */
214struct bfin_spi_regs {
215 u32 revid;
216 u32 control;
217 u32 rx_control;
218 u32 tx_control;
219 u32 clock;
220 u32 delay;
221 u32 ssel;
222 u32 rwc;
223 u32 rwcr;
224 u32 twc;
225 u32 twcr;
226 u32 reserved0;
227 u32 emask;
228 u32 emaskcl;
229 u32 emaskst;
230 u32 reserved1;
231 u32 status;
232 u32 elat;
233 u32 elatcl;
234 u32 reserved2;
235 u32 rfifo;
236 u32 reserved3;
237 u32 tfifo;
238};
239
240#define MAX_CTRL_CS 8 /* cs in spi controller */
241
242/* device.platform_data for SSP controller devices */
243struct bfin_spi3_master {
244 u16 num_chipselect;
245 u16 pin_req[7];
246};
247
248/* spi_board_info.controller_data for SPI slave devices,
249 * copied to spi_device.platform_data ... mostly for dma tuning
250 */
251struct bfin_spi3_chip {
252 u32 control;
253 u16 cs_chg_udelay; /* Some devices require 16-bit delays */
254 u32 tx_dummy_val; /* tx value for rx only transfer */
255 bool enable_dma;
256};
257
258#endif /* _SPI_CHANNEL_H_ */