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wdenk96e48cf2003-08-05 18:22:44 +00001/*
2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25
26#if defined(CONFIG_PCI) && defined(CONFIG_MPC5200)
27
28#include <asm/processor.h>
29#include <asm/io.h>
30#include <pci.h>
31#include <mpc5xxx.h>
32
33/* System RAM mapped over PCI */
34#define CONFIG_PCI_MEMORY_BUS CFG_SDRAM_BASE
35#define CONFIG_PCI_MEMORY_PHYS CFG_SDRAM_BASE
36#define CONFIG_PCI_MEMORY_SIZE (1024 * 1024 * 1024)
37
38/* PCIIWCR bit fields */
39#define IWCR_MEM (0 << 3)
40#define IWCR_IO (1 << 3)
41#define IWCR_READ (0 << 1)
42#define IWCR_READLINE (1 << 1)
43#define IWCR_READMULT (2 << 1)
44#define IWCR_EN (1 << 0)
45
46static int mpc5200_read_config_dword(struct pci_controller *hose,
47 pci_dev_t dev, int offset, u32* value)
48{
49 *(volatile u32 *)MPC5XXX_PCI_CAR = (1 << 31) | dev | offset;
50 eieio();
wdenk35656de2003-09-14 19:08:39 +000051 udelay(10);
Stefan Roese5e4b3362005-08-22 17:51:53 +020052#if (defined CONFIG_PF5200 || defined CONFIG_CPCI5200)
53 if (dev & 0x00ff0000) {
54 u32 val;
55 val = in_le16((volatile u16 *)(CONFIG_PCI_IO_PHYS+2));
56 udelay(10);
57 val = val << 16;
58 val |= in_le16((volatile u16 *)(CONFIG_PCI_IO_PHYS+0));
59 *value = val;
60 } else {
61 *value = in_le32((volatile u32 *)CONFIG_PCI_IO_PHYS);
62 }
63 udelay(10);
64#else
wdenk96e48cf2003-08-05 18:22:44 +000065 *value = in_le32((volatile u32 *)CONFIG_PCI_IO_PHYS);
Stefan Roese5e4b3362005-08-22 17:51:53 +020066#endif
wdenk96e48cf2003-08-05 18:22:44 +000067 eieio();
68 *(volatile u32 *)MPC5XXX_PCI_CAR = 0;
wdenk35656de2003-09-14 19:08:39 +000069 udelay(10);
wdenk96e48cf2003-08-05 18:22:44 +000070 return 0;
71}
72
73static int mpc5200_write_config_dword(struct pci_controller *hose,
74 pci_dev_t dev, int offset, u32 value)
75{
76 *(volatile u32 *)MPC5XXX_PCI_CAR = (1 << 31) | dev | offset;
77 eieio();
wdenk35656de2003-09-14 19:08:39 +000078 udelay(10);
wdenk96e48cf2003-08-05 18:22:44 +000079 out_le32((volatile u32 *)CONFIG_PCI_IO_PHYS, value);
80 eieio();
81 *(volatile u32 *)MPC5XXX_PCI_CAR = 0;
wdenk35656de2003-09-14 19:08:39 +000082 udelay(10);
wdenk96e48cf2003-08-05 18:22:44 +000083 return 0;
84}
85
86void pci_mpc5xxx_init (struct pci_controller *hose)
87{
88 hose->first_busno = 0;
89 hose->last_busno = 0xff;
90
91 /* System space */
92 pci_set_region(hose->regions + 0,
93 CONFIG_PCI_MEMORY_BUS,
94 CONFIG_PCI_MEMORY_PHYS,
95 CONFIG_PCI_MEMORY_SIZE,
96 PCI_REGION_MEM | PCI_REGION_MEMORY);
97
98 /* PCI memory space */
99 pci_set_region(hose->regions + 1,
100 CONFIG_PCI_MEM_BUS,
101 CONFIG_PCI_MEM_PHYS,
102 CONFIG_PCI_MEM_SIZE,
103 PCI_REGION_MEM);
104
105 /* PCI IO space */
106 pci_set_region(hose->regions + 2,
107 CONFIG_PCI_IO_BUS,
108 CONFIG_PCI_IO_PHYS,
109 CONFIG_PCI_IO_SIZE,
110 PCI_REGION_IO);
111
112 hose->region_count = 3;
113
114 pci_register_hose(hose);
115
116 /* GPIO Multiplexing - enable PCI */
117 *(vu_long *)MPC5XXX_GPS_PORT_CONFIG &= ~(1 << 15);
wdenk42d1f032003-10-15 23:53:47 +0000118
wdenk96e48cf2003-08-05 18:22:44 +0000119 /* Set host bridge as pci master and enable memory decoding */
120 *(vu_long *)MPC5XXX_PCI_CMD |=
121 PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
wdenk42d1f032003-10-15 23:53:47 +0000122
wdenk96e48cf2003-08-05 18:22:44 +0000123 /* Set maximum latency timer */
124 *(vu_long *)MPC5XXX_PCI_CFG |= (0xf800);
125
126 /* Set cache line size */
127 *(vu_long *)MPC5XXX_PCI_CFG = (*(vu_long *)MPC5XXX_PCI_CFG & ~0xff) |
128 (CFG_CACHELINE_SIZE / 4);
wdenk42d1f032003-10-15 23:53:47 +0000129
wdenk96e48cf2003-08-05 18:22:44 +0000130 /* Map MBAR to PCI space */
131 *(vu_long *)MPC5XXX_PCI_BAR0 = CFG_MBAR;
wdenk3c74e322004-02-22 23:46:08 +0000132 *(vu_long *)MPC5XXX_PCI_TBATR0 = CFG_MBAR | 1;
wdenk42d1f032003-10-15 23:53:47 +0000133
wdenk96e48cf2003-08-05 18:22:44 +0000134 /* Map RAM to PCI space */
135 *(vu_long *)MPC5XXX_PCI_BAR1 = CONFIG_PCI_MEMORY_BUS | (1 << 3);
136 *(vu_long *)MPC5XXX_PCI_TBATR1 = CONFIG_PCI_MEMORY_PHYS | 1;
137
wdenk96e48cf2003-08-05 18:22:44 +0000138 /* Park XLB on PCI */
139 *(vu_long *)(MPC5XXX_XLBARB + 0x40) &= ~((7 << 8) | (3 << 5));
140 *(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (3 << 8) | (3 << 5);
141
wdenk96e48cf2003-08-05 18:22:44 +0000142 /* Disable interrupts from PCI controller */
143 *(vu_long *)MPC5XXX_PCI_GSCR &= ~(7 << 12);
Wolfgang Denka9e642e2005-12-16 15:14:18 +0100144 *(vu_long *)MPC5XXX_PCI_ICR &= ~(7 << 24);
145
146 /* Set PCI retry counter to 0 = infinite retry. */
147 /* The default of 255 is too short for slow devices. */
148 *(vu_long *)MPC5XXX_PCI_ICR &= 0xFFFFFF00;
wdenk42d1f032003-10-15 23:53:47 +0000149
wdenk96e48cf2003-08-05 18:22:44 +0000150 /* Disable initiator windows */
151 *(vu_long *)MPC5XXX_PCI_IWCR = 0;
wdenk42d1f032003-10-15 23:53:47 +0000152
wdenk96e48cf2003-08-05 18:22:44 +0000153 /* Map PCI memory to physical space */
154 *(vu_long *)MPC5XXX_PCI_IW0BTAR = CONFIG_PCI_MEM_PHYS |
155 (((CONFIG_PCI_MEM_SIZE - 1) >> 8) & 0x00ff0000) |
156 (CONFIG_PCI_MEM_BUS >> 16);
157 *(vu_long *)MPC5XXX_PCI_IWCR |= (IWCR_MEM | IWCR_READ | IWCR_EN) << 24;
158
159 /* Map PCI I/O to physical space */
160 *(vu_long *)MPC5XXX_PCI_IW1BTAR = CONFIG_PCI_IO_PHYS |
161 (((CONFIG_PCI_IO_SIZE - 1) >> 8) & 0x00ff0000) |
162 (CONFIG_PCI_IO_BUS >> 16);
163 *(vu_long *)MPC5XXX_PCI_IWCR |= (IWCR_IO | IWCR_READ | IWCR_EN) << 16;
164
165 /* Reset the PCI bus */
166 *(vu_long *)MPC5XXX_PCI_GSCR |= 1;
167 udelay(1000);
168 *(vu_long *)MPC5XXX_PCI_GSCR &= ~1;
169 udelay(1000);
170
171 pci_set_ops(hose,
172 pci_hose_read_config_byte_via_dword,
173 pci_hose_read_config_word_via_dword,
174 mpc5200_read_config_dword,
175 pci_hose_write_config_byte_via_dword,
176 pci_hose_write_config_word_via_dword,
177 mpc5200_write_config_dword);
wdenk42d1f032003-10-15 23:53:47 +0000178
wdenk96e48cf2003-08-05 18:22:44 +0000179 udelay(1000);
180
181#ifdef CONFIG_PCI_SCAN_SHOW
182 printf("PCI: Bus Dev VenId DevId Class Int\n");
183#endif
184
185 hose->last_busno = pci_hose_scan(hose);
186}
187#endif /* CONFIG_PCI && CONFIG_MPC5200 */