summaryrefslogtreecommitdiff
path: root/src/southbridge/nvidia/mcp55/smbus.c
blob: 51a71805f31473cc3bcc62a06072ea0d964793a9 (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
/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2004 Tyan Computer
 * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
 * Copyright (C) 2006,2007 AMD
 * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD.
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 */

#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <device/smbus.h>
#include <arch/io.h>
#include "mcp55.h"
#include "smbus.h"

static int lsmbus_recv_byte(struct device *dev)
{
	unsigned device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);

	res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));

	return do_smbus_recv_byte(res->base, device);
}

static int lsmbus_send_byte(struct device *dev, u8 val)
{
	unsigned device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);

	res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));

	return do_smbus_send_byte(res->base, device, val);
}

static int lsmbus_read_byte(struct device *dev, u8 address)
{
	unsigned device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);

	res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));

	return do_smbus_read_byte(res->base, device, address);
}

static int lsmbus_write_byte(struct device *dev, u8 address, u8 val)
{
	unsigned device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);

	res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));

	return do_smbus_write_byte(res->base, device, address, val);
}
static struct smbus_bus_operations lops_smbus_bus = {
	.recv_byte	= lsmbus_recv_byte,
	.send_byte	= lsmbus_send_byte,
	.read_byte	= lsmbus_read_byte,
	.write_byte	= lsmbus_write_byte,
};

#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
unsigned pm_base;
#endif

static void mcp55_sm_read_resources(struct device *dev)
{
	unsigned long index;

	/* Get the normal pci resources of this device */
	pci_dev_read_resources(dev);

	for (index = 0x60; index <= 0x68; index+=4) { // We got another 3.
		pci_get_resource(dev, index);
	}
	compact_resources(dev);
}

static void mcp55_sm_init(struct device *dev)
{
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
	struct resource *res;

	res = find_resource(dev, 0x60);

	if (res)
		pm_base = res->base;
#endif
}

static struct device_operations smbus_ops = {
	.read_resources	= mcp55_sm_read_resources,
	.set_resources	= pci_dev_set_resources,
	.enable_resources	= pci_dev_enable_resources,
	.init		= mcp55_sm_init,
	.scan_bus	= scan_smbus,
//	.enable		= mcp55_enable,
	.ops_pci	= &mcp55_pci_ops,
	.ops_smbus_bus	= &lops_smbus_bus,
};
static const struct pci_driver smbus_driver __pci_driver = {
	.ops	= &smbus_ops,
	.vendor	= PCI_VENDOR_ID_NVIDIA,
	.device	= PCI_DEVICE_ID_NVIDIA_MCP55_SM2,
};