Linux kernel mirror (for testing)
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tjh.dev
kernel
os
linux
1/*
2 * Sequencer Serial Port (SSP) driver for Texas Instruments' SoCs
3 *
4 * Copyright (C) 2010 Texas Instruments 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 as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#ifndef __TI_SSP_H__
22#define __TI_SSP_H__
23
24struct ti_ssp_dev_data {
25 const char *dev_name;
26 void *pdata;
27 size_t pdata_size;
28};
29
30struct ti_ssp_data {
31 unsigned long out_clock;
32 struct ti_ssp_dev_data dev_data[2];
33};
34
35struct ti_ssp_spi_data {
36 unsigned long iosel;
37 int num_cs;
38 void (*select)(int cs);
39};
40
41/*
42 * Sequencer port IO pin configuration bits. These do not correlate 1-1 with
43 * the hardware. The iosel field in the port data combines iosel1 and iosel2,
44 * and is therefore not a direct map to register space. It is best to use the
45 * macros below to construct iosel values.
46 *
47 * least significant 16 bits --> iosel1
48 * most significant 16 bits --> iosel2
49 */
50
51#define SSP_IN 0x0000
52#define SSP_DATA 0x0001
53#define SSP_CLOCK 0x0002
54#define SSP_CHIPSEL 0x0003
55#define SSP_OUT 0x0004
56#define SSP_PIN_SEL(pin, v) ((v) << ((pin) * 3))
57#define SSP_PIN_MASK(pin) SSP_PIN_SEL(pin, 0x7)
58#define SSP_INPUT_SEL(pin) ((pin) << 16)
59
60/* Sequencer port config bits */
61#define SSP_EARLY_DIN BIT(8)
62#define SSP_DELAY_DOUT BIT(9)
63
64/* Sequence map definitions */
65#define SSP_CLK_HIGH BIT(0)
66#define SSP_CLK_LOW 0
67#define SSP_DATA_HIGH BIT(1)
68#define SSP_DATA_LOW 0
69#define SSP_CS_HIGH BIT(2)
70#define SSP_CS_LOW 0
71#define SSP_OUT_MODE BIT(3)
72#define SSP_IN_MODE 0
73#define SSP_DATA_REG BIT(4)
74#define SSP_ADDR_REG 0
75
76#define SSP_OPCODE_DIRECT ((0x0) << 5)
77#define SSP_OPCODE_TOGGLE ((0x1) << 5)
78#define SSP_OPCODE_SHIFT ((0x2) << 5)
79#define SSP_OPCODE_BRANCH0 ((0x4) << 5)
80#define SSP_OPCODE_BRANCH1 ((0x5) << 5)
81#define SSP_OPCODE_BRANCH ((0x6) << 5)
82#define SSP_OPCODE_STOP ((0x7) << 5)
83#define SSP_BRANCH(addr) ((addr) << 8)
84#define SSP_COUNT(cycles) ((cycles) << 8)
85
86int ti_ssp_raw_read(struct device *dev);
87int ti_ssp_raw_write(struct device *dev, u32 val);
88int ti_ssp_load(struct device *dev, int offs, u32* prog, int len);
89int ti_ssp_run(struct device *dev, u32 pc, u32 input, u32 *output);
90int ti_ssp_set_mode(struct device *dev, int mode);
91int ti_ssp_set_iosel(struct device *dev, u32 iosel);
92
93#endif /* __TI_SSP_H__ */