summaryrefslogtreecommitdiffstats
path: root/spi.c
blob: 41bb8f31e52c65d692c01d8247dcecc1e20c12ba (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2007, 2008, 2009 Carl-Daniel Hailfinger
 * Copyright (C) 2008 coresystems GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

/*
 * Contains the generic SPI framework
 */

#include <string.h>
#include "flash.h"
#include "flashchips.h"
#include "chipdrivers.h"
#include "spi.h"

enum spi_controller spi_controller = SPI_CONTROLLER_NONE;
void *spibar = NULL;

void spi_prettyprint_status_register(struct flashchip *flash);

const struct spi_programmer spi_programmer[] = {
	{ /* SPI_CONTROLLER_NONE */
		.command = NULL,
		.multicommand = NULL,
		.read = NULL,
		.write_256 = NULL,
	},

#if INTERNAL_SUPPORT == 1
	{ /* SPI_CONTROLLER_ICH7 */
		.command = ich_spi_send_command,
		.multicommand = ich_spi_send_multicommand,
		.read = ich_spi_read,
		.write_256 = ich_spi_write_256,
	},

	{ /* SPI_CONTROLLER_ICH9 */
		.command = ich_spi_send_command,
		.multicommand = ich_spi_send_multicommand,
		.read = ich_spi_read,
		.write_256 = ich_spi_write_256,
	},

	{ /* SPI_CONTROLLER_IT87XX */
		.command = it8716f_spi_send_command,
		.multicommand = default_spi_send_multicommand,
		.read = it8716f_spi_chip_read,
		.write_256 = it8716f_spi_chip_write_256,
	},

	{ /* SPI_CONTROLLER_SB600 */
		.command = sb600_spi_send_command,
		.multicommand = default_spi_send_multicommand,
		.read = sb600_spi_read,
		.write_256 = sb600_spi_write_1,
	},

	{ /* SPI_CONTROLLER_VIA */
		.command = ich_spi_send_command,
		.multicommand = ich_spi_send_multicommand,
		.read = ich_spi_read,
		.write_256 = ich_spi_write_256,
	},

	{ /* SPI_CONTROLLER_WBSIO */
		.command = wbsio_spi_send_command,
		.multicommand = default_spi_send_multicommand,
		.read = wbsio_spi_read,
		.write_256 = wbsio_spi_write_1,
	},
#endif

#if FT2232_SPI_SUPPORT == 1
	{ /* SPI_CONTROLLER_FT2232 */
		.command = ft2232_spi_send_command,
		.multicommand = default_spi_send_multicommand,
		.read = ft2232_spi_read,
		.write_256 = ft2232_spi_write_256,
	},
#endif

#if DUMMY_SUPPORT == 1
	{ /* SPI_CONTROLLER_DUMMY */
		.command = dummy_spi_send_command,
		.multicommand = default_spi_send_multicommand,
		.read = NULL,
		.write_256 = NULL,
	},
#endif

#if BUSPIRATE_SPI_SUPPORT == 1
	{ /* SPI_CONTROLLER_BUSPIRATE */
		.command = buspirate_spi_send_command,
		.multicommand = default_spi_send_multicommand,
		.read = buspirate_spi_read,
		.write_256 = spi_chip_write_1,
	},
#endif

#if DEDIPROG_SUPPORT == 1
	{ /* SPI_CONTROLLER_DEDIPROG */
		.command = dediprog_spi_send_command,
		.multicommand = default_spi_send_multicommand,
		.read = dediprog_spi_read,
		.write_256 = spi_chip_write_1,
	},
#endif

	{}, /* This entry corresponds to SPI_CONTROLLER_INVALID. */
};

const int spi_programmer_count = ARRAY_SIZE(spi_programmer);

int spi_send_command(unsigned int writecnt, unsigned int readcnt,
		const unsigned char *writearr, unsigned char *readarr)
{
	if (!spi_programmer[spi_controller].command) {
		fprintf(stderr, "%s called, but SPI is unsupported on this "
			"hardware. Please report a bug.\n", __func__);
		return 1;
	}

	return spi_programmer[spi_controller].command(writecnt, readcnt,
						      writearr, readarr);
}

int spi_send_multicommand(struct spi_command *cmds)
{
	if (!spi_programmer[spi_controller].multicommand) {
		fprintf(stderr, "%s called, but SPI is unsupported on this "
			"hardware. Please report a bug.\n", __func__);
		return 1;
	}

	return spi_programmer[spi_controller].multicommand(cmds);
}

int default_spi_send_command(unsigned int writecnt, unsigned int readcnt,
			     const unsigned char *writearr, unsigned char *readarr)
{
	struct spi_command cmd[] = {
	{
		.writecnt = writecnt,
		.readcnt = readcnt,
		.writearr = writearr,
		.readarr = readarr,
	}, {
		.writecnt = 0,
		.writearr = NULL,
		.readcnt = 0,
		.readarr = NULL,
	}};

	return spi_send_multicommand(cmd);
}

int default_spi_send_multicommand(struct spi_command *cmds)
{
	int result = 0;
	for (; (cmds->writecnt || cmds->readcnt) && !result; cmds++) {
		result = spi_send_command(cmds->writecnt, cmds->readcnt,
					  cmds->writearr, cmds->readarr);
	}
	return result;
}

int spi_chip_read(struct flashchip *flash, uint8_t *buf, int start, int len)
{
	if (!spi_programmer[spi_controller].read) {
		fprintf(stderr, "%s called, but SPI read is unsupported on this"
			" hardware. Please report a bug.\n", __func__);
		return 1;
	}

	return spi_programmer[spi_controller].read(flash, buf, start, len);
}

/*
 * Program chip using page (256 bytes) programming.
 * Some SPI masters can't do this, they use single byte programming instead.
 */
int spi_chip_write_256(struct flashchip *flash, uint8_t *buf)
{
	if (!spi_programmer[spi_controller].write_256) {
		fprintf(stderr, "%s called, but SPI page write is unsupported "
			" on this hardware. Please report a bug.\n", __func__);
		return 1;
	}

	return spi_programmer[spi_controller].write_256(flash, buf);
}

uint32_t spi_get_valid_read_addr(void)
{
	/* Need to return BBAR for ICH chipsets. */
	return 0;
}
OpenPOWER on IntegriCloud