summaryrefslogtreecommitdiff
path: root/board/freescale/mpc8349emds/pci.c
blob: 3ddbe717756e9b11c100905982e7cbb9fedd9b4e (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
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
 */

#include <init.h>
#include <asm/mmu.h>
#include <asm/io.h>
#include <common.h>
#include <mpc83xx.h>
#include <pci.h>
#include <i2c.h>
#include <asm/fsl_i2c.h>
#include <linux/delay.h>

static struct pci_region pci1_regions[] = {
	{
		bus_start: CONFIG_SYS_PCI1_MEM_BASE,
		phys_start: CONFIG_SYS_PCI1_MEM_PHYS,
		size: CONFIG_SYS_PCI1_MEM_SIZE,
		flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
	},
	{
		bus_start: CONFIG_SYS_PCI1_IO_BASE,
		phys_start: CONFIG_SYS_PCI1_IO_PHYS,
		size: CONFIG_SYS_PCI1_IO_SIZE,
		flags: PCI_REGION_IO
	},
	{
		bus_start: CONFIG_SYS_PCI1_MMIO_BASE,
		phys_start: CONFIG_SYS_PCI1_MMIO_PHYS,
		size: CONFIG_SYS_PCI1_MMIO_SIZE,
		flags: PCI_REGION_MEM
	},
};

#ifdef CONFIG_MPC83XX_PCI2
static struct pci_region pci2_regions[] = {
	{
		bus_start: CONFIG_SYS_PCI2_MEM_BASE,
		phys_start: CONFIG_SYS_PCI2_MEM_PHYS,
		size: CONFIG_SYS_PCI2_MEM_SIZE,
		flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
	},
	{
		bus_start: CONFIG_SYS_PCI2_IO_BASE,
		phys_start: CONFIG_SYS_PCI2_IO_PHYS,
		size: CONFIG_SYS_PCI2_IO_SIZE,
		flags: PCI_REGION_IO
	},
	{
		bus_start: CONFIG_SYS_PCI2_MMIO_BASE,
		phys_start: CONFIG_SYS_PCI2_MMIO_PHYS,
		size: CONFIG_SYS_PCI2_MMIO_SIZE,
		flags: PCI_REGION_MEM
	},
};
#endif

#ifndef CONFIG_PCISLAVE
void pib_init(void)
{
	u8 val8, orig_i2c_bus;
	/*
	 * Assign PIB PMC slot to desired PCI bus
	 */
	/* Switch temporarily to I2C bus #2 */
	orig_i2c_bus = i2c_get_bus_num();
	i2c_set_bus_num(1);

	val8 = 0;
	i2c_write(0x23, 0x6, 1, &val8, 1);
	i2c_write(0x23, 0x7, 1, &val8, 1);
	val8 = 0xff;
	i2c_write(0x23, 0x2, 1, &val8, 1);
	i2c_write(0x23, 0x3, 1, &val8, 1);

	val8 = 0;
	i2c_write(0x26, 0x6, 1, &val8, 1);
	val8 = 0x34;
	i2c_write(0x26, 0x7, 1, &val8, 1);
#if defined(CONFIG_PCI_64BIT)
	val8 = 0xf4;	/* PMC2:PCI1/64-bit */
#elif defined(CONFIG_PCI_ALL_PCI1)
	val8 = 0xf3;	/* PMC1:PCI1 PMC2:PCI1 PMC3:PCI1 */
#elif defined(CONFIG_PCI_ONE_PCI1)
	val8 = 0xf9;	/* PMC1:PCI1 PMC2:PCI2 PMC3:PCI2 */
#else
	val8 = 0xf5;	/* PMC1:PCI1 PMC2:PCI1 PMC3:PCI2 */
#endif
	i2c_write(0x26, 0x2, 1, &val8, 1);
	val8 = 0xff;
	i2c_write(0x26, 0x3, 1, &val8, 1);
	val8 = 0;
	i2c_write(0x27, 0x6, 1, &val8, 1);
	i2c_write(0x27, 0x7, 1, &val8, 1);
	val8 = 0xff;
	i2c_write(0x27, 0x2, 1, &val8, 1);
	val8 = 0xef;
	i2c_write(0x27, 0x3, 1, &val8, 1);
	asm("eieio");

#if defined(CONFIG_PCI_64BIT)
	printf("PCI1: 64-bit on PMC2\n");
#elif defined(CONFIG_PCI_ALL_PCI1)
	printf("PCI1: 32-bit on PMC1, PMC2, PMC3\n");
#elif defined(CONFIG_PCI_ONE_PCI1)
	printf("PCI1: 32-bit on PMC1\n");
	printf("PCI2: 32-bit on PMC2, PMC3\n");
#else
	printf("PCI1: 32-bit on PMC1, PMC2\n");
	printf("PCI2: 32-bit on PMC3\n");
#endif
	/* Reset to original I2C bus */
	i2c_set_bus_num(orig_i2c_bus);
}

void pci_init_board(void)
{
	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
	volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
	volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
#ifndef CONFIG_MPC83XX_PCI2
	struct pci_region *reg[] = { pci1_regions };
#else
	struct pci_region *reg[] = { pci1_regions, pci2_regions };
#endif

	/* initialize the PCA9555PW IO expander on the PIB board */
	pib_init();

	/* Enable all 8 PCI_CLK_OUTPUTS */
	clk->occr = 0xff000000;
	udelay(2000);

	/* Configure PCI Local Access Windows */
	pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
	pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;

	pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
	pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;

	udelay(2000);

#ifndef CONFIG_MPC83XX_PCI2
	mpc83xx_pci_init(1, reg);
#else
	mpc83xx_pci_init(2, reg);
#endif
}

#else
void pci_init_board(void)
{
	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
	volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
	volatile pcictrl83xx_t *pci_ctrl = &immr->pci_ctrl[0];
	struct pci_region *reg[] = { pci1_regions };

	/* Configure PCI Local Access Windows */
	pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
	pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;

	pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
	pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;

	mpc83xx_pci_init(1, reg);

	/* Configure PCI Inbound Translation Windows (3 1MB windows) */
	pci_ctrl->pitar0 = 0x0;
	pci_ctrl->pibar0 = 0x0;
	pci_ctrl->piwar0 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
			   PIWAR_WTT_SNOOP | PIWAR_IWS_1M;

	pci_ctrl->pitar1  = 0x0;
	pci_ctrl->pibar1  = 0x0;
	pci_ctrl->piebar1 = 0x0;
	pci_ctrl->piwar1  = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
			    PIWAR_WTT_SNOOP | PIWAR_IWS_1M;

	pci_ctrl->pitar2  = 0x0;
	pci_ctrl->pibar2  = 0x0;
	pci_ctrl->piebar2 = 0x0;
	pci_ctrl->piwar2  = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
			    PIWAR_WTT_SNOOP | PIWAR_IWS_1M;

	/* Unlock the configuration bit */
	mpc83xx_pcislave_unlock(0);
	printf("PCI:   Agent mode enabled\n");
}
#endif /* CONFIG_PCISLAVE */