summaryrefslogtreecommitdiffstats
path: root/ogp_spi.c
blob: 929ecd9ecdf3a114364ebee287fabb3223cc7578 (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
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2010 Mark Marshall
 *
 * 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
 */

#include <stdlib.h>
#include <strings.h>
#include <string.h>
#include "flash.h"
#include "programmer.h"
#include "hwaccess.h"

#define PCI_VENDOR_ID_OGP 0x1227

/* These are the register addresses for the OGD1 / OGA1.  If they are
 * different for later versions of the hardware then we will need
 * logic to select between the different hardware versions. */
#define OGA1_XP10_BPROM_SI			     0x0040 /*	W */
#define OGA1_XP10_BPROM_SO			     0x0040 /*	R */
#define OGA1_XP10_BPROM_CE_BAR			     0x0044 /*	W */
#define OGA1_XP10_BPROM_SCK			     0x0048 /*	W */
#define OGA1_XP10_BPROM_REG_SEL			     0x004C /*	W */
#define OGA1_XP10_CPROM_SI			     0x0050 /*	W */
#define OGA1_XP10_CPROM_SO			     0x0050 /*	R */
#define OGA1_XP10_CPROM_CE_BAR			     0x0054 /*	W */
#define OGA1_XP10_CPROM_SCK			     0x0058 /*	W */
#define OGA1_XP10_CPROM_REG_SEL			     0x005C /*	W */

static uint8_t *ogp_spibar;

static uint32_t ogp_reg_sel;
static uint32_t ogp_reg_siso;
static uint32_t ogp_reg__ce;
static uint32_t ogp_reg_sck;

const struct dev_entry ogp_spi[] = {
	{PCI_VENDOR_ID_OGP, 0x0000, OK, "Open Graphics Project", "Development Board OGD1"},

	{0},
};

static void ogp_request_spibus(void)
{
	pci_mmio_writel(1, ogp_spibar + ogp_reg_sel);
}

static void ogp_release_spibus(void)
{
	pci_mmio_writel(0, ogp_spibar + ogp_reg_sel);
}

static void ogp_bitbang_set_cs(int val)
{
	pci_mmio_writel(val, ogp_spibar + ogp_reg__ce);
}

static void ogp_bitbang_set_sck(int val)
{
	pci_mmio_writel(val, ogp_spibar + ogp_reg_sck);
}

static void ogp_bitbang_set_mosi(int val)
{
	pci_mmio_writel(val, ogp_spibar + ogp_reg_siso);
}

static int ogp_bitbang_get_miso(void)
{
	uint32_t tmp;

	tmp = pci_mmio_readl(ogp_spibar + ogp_reg_siso);
	return tmp & 0x1;
}

static const struct bitbang_spi_master bitbang_spi_master_ogp = {
	.type = BITBANG_SPI_MASTER_OGP,
	.set_cs = ogp_bitbang_set_cs,
	.set_sck = ogp_bitbang_set_sck,
	.set_mosi = ogp_bitbang_set_mosi,
	.get_miso = ogp_bitbang_get_miso,
	.request_bus = ogp_request_spibus,
	.release_bus = ogp_release_spibus,
	.half_period = 0,
};

int ogp_spi_init(void)
{
	struct pci_dev *dev = NULL;
	char *type;

	type = extract_programmer_param("rom");

	if (!type) {
		msg_perr("Please use flashrom -p ogp_spi:rom=... to specify "
			 "which flashchip you want to access.\n");
		return 1;
	} else if (!strcasecmp(type, "bprom") || !strcasecmp(type, "bios")) {
		ogp_reg_sel  = OGA1_XP10_BPROM_REG_SEL;
		ogp_reg_siso = OGA1_XP10_BPROM_SI;
		ogp_reg__ce  = OGA1_XP10_BPROM_CE_BAR;
		ogp_reg_sck  = OGA1_XP10_BPROM_SCK;
	} else if (!strcasecmp(type, "cprom") || !strcasecmp(type, "s3")) {
		ogp_reg_sel  = OGA1_XP10_CPROM_REG_SEL;
		ogp_reg_siso = OGA1_XP10_CPROM_SI;
		ogp_reg__ce  = OGA1_XP10_CPROM_CE_BAR;
		ogp_reg_sck  = OGA1_XP10_CPROM_SCK;
	} else {
		msg_perr("Invalid or missing rom= parameter.\n");
		free(type);
		return 1;
	}
	free(type);

	if (rget_io_perms())
		return 1;

	dev = pcidev_init(ogp_spi, PCI_BASE_ADDRESS_0);
	if (!dev)
		return 1;

	uint32_t io_base_addr = pcidev_readbar(dev, PCI_BASE_ADDRESS_0);
	if (!io_base_addr)
		return 1;

	ogp_spibar = rphysmap("OGP registers", io_base_addr, 4096);
	if (ogp_spibar == ERROR_PTR)
		return 1;

	if (register_spi_bitbang_master(&bitbang_spi_master_ogp))
		return 1;

	return 0;
}
OpenPOWER on IntegriCloud