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Rafal Jaworowski6902df52005-10-17 02:39:53 +02001/*
2 * (C) Copyright 2005
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
25#include <asm/mmu.h>
26#include <common.h>
27#include <pci.h>
28
29#ifdef CONFIG_PCI
30
31/* System RAM mapped to PCI space */
32#define CONFIG_PCI_SYS_MEM_BUS CFG_SDRAM_BASE
33#define CONFIG_PCI_SYS_MEM_PHYS CFG_SDRAM_BASE
34#define CONFIG_PCI_SYS_MEM_SIZE (1024 * 1024 * 1024)
35
36#ifndef CONFIG_PCI_PNP
37static struct pci_config_table pci_tqm834x_config_table[] = {
38 {PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
39 PCI_IDSEL_NUMBER, PCI_ANY_ID,
40 pci_cfgfunc_config_device, {PCI_ENET0_IOADDR,
41 PCI_ENET0_MEMADDR,
42 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
43 }
44 },
45 {}
46};
47#endif
48
49static struct pci_controller pci1_hose = {
50#ifndef CONFIG_PCI_PNP
51 config_table:pci_tqm834x_config_table,
52#endif
53};
54
55
56/**************************************************************************
57 * pci_init_board()
58 *
59 * NOTICE: MPC8349 internally has two PCI controllers (PCI1 and PCI2) but since
60 * per TQM834x design physical connections to external devices (PCI sockets)
61 * are routed only to the PCI1 we do not account for the second one - this code
62 * supports PCI1 module only. Should support for the PCI2 be required in the
63 * future it needs a separate pci_controller structure (above) and handling -
64 * please refer to other boards' implementation for dual PCI host controllers,
65 * for example board/Marvell/db64360/pci.c, pci_init_board()
66 *
67 */
68void
69pci_init_board(void)
70{
71 volatile immap_t * immr;
Tanya Jiang2fc34ae2006-08-03 18:38:13 +080072 volatile clk83xx_t * clk;
73 volatile law83xx_t * pci_law;
74 volatile pot83xx_t * pci_pot;
75 volatile pcictrl83xx_t * pci_ctrl;
76 volatile pciconf83xx_t * pci_conf;
Rafal Jaworowski6902df52005-10-17 02:39:53 +020077 u16 reg16;
78 u32 reg32;
79 struct pci_controller * hose;
80
Timur Tabid239d742006-11-03 12:00:28 -060081 immr = (immap_t *)CFG_IMMR;
Tanya Jiang2fc34ae2006-08-03 18:38:13 +080082 clk = (clk83xx_t *)&immr->clk;
Rafal Jaworowski6902df52005-10-17 02:39:53 +020083 pci_law = immr->sysconf.pcilaw;
84 pci_pot = immr->ios.pot;
85 pci_ctrl = immr->pci_ctrl;
86 pci_conf = immr->pci_conf;
87
88 hose = &pci1_hose;
Wolfgang Denkf013dac2005-12-04 00:40:34 +010089
Rafal Jaworowski6902df52005-10-17 02:39:53 +020090 /*
Wolfgang Denkf013dac2005-12-04 00:40:34 +010091 * Configure PCI controller and PCI_CLK_OUTPUT
Rafal Jaworowski6902df52005-10-17 02:39:53 +020092 */
93
94 /*
95 * WARNING! only PCI_CLK_OUTPUT1 is enabled here as this is the one
96 * line actually used for clocking all external PCI devices in TQM83xx.
Wolfgang Denkf013dac2005-12-04 00:40:34 +010097 * Enabling other PCI_CLK_OUTPUT lines may lead to board's hang for
Rafal Jaworowski6902df52005-10-17 02:39:53 +020098 * unknown reasons - particularly PCI_CLK_OUTPUT6 and PCI_CLK_OUTPUT7
Wolfgang Denkf013dac2005-12-04 00:40:34 +010099 * are known to hang the board; this issue is under investigation
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200100 * (13 oct 05)
101 */
102 reg32 = OCCR_PCICOE1;
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100103#if 0
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200104 /* enabling all PCI_CLK_OUTPUT lines HANGS the board... */
105 reg32 = 0xff000000;
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100106#endif
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200107 if (clk->spmr & SPMR_CKID) {
108 /* PCI Clock is half CONFIG_83XX_CLKIN so need to set up OCCR
109 * fields accordingly */
110 reg32 |= (OCCR_PCI1CR | OCCR_PCI2CR);
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100111
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200112 reg32 |= (OCCR_PCICD0 | OCCR_PCICD1 | OCCR_PCICD2 \
113 | OCCR_PCICD3 | OCCR_PCICD4 | OCCR_PCICD5 \
114 | OCCR_PCICD6 | OCCR_PCICD7);
115 }
116
117 clk->occr = reg32;
118 udelay(2000);
119
120 /*
121 * Release PCI RST Output signal
122 */
123 pci_ctrl[0].gcr = 0;
124 udelay(2000);
125 pci_ctrl[0].gcr = 1;
126 udelay(2000);
127
128 /*
129 * Configure PCI Local Access Windows
130 */
131 pci_law[0].bar = CFG_PCI1_MEM_PHYS & LAWBAR_BAR;
Rafal Jaworowski5a164c82005-11-17 00:26:18 +0100132 pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_512M;
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200133
134 pci_law[1].bar = CFG_PCI1_IO_PHYS & LAWBAR_BAR;
Rafal Jaworowski5a164c82005-11-17 00:26:18 +0100135 pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_16M;
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200136
137 /*
138 * Configure PCI Outbound Translation Windows
139 */
140
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100141 /* PCI1 mem space */
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200142 pci_pot[0].potar = (CFG_PCI1_MEM_BASE >> 12) & POTAR_TA_MASK;
143 pci_pot[0].pobar = (CFG_PCI1_MEM_PHYS >> 12) & POBAR_BA_MASK;
144 pci_pot[0].pocmr = POCMR_EN | (POCMR_CM_512M & POCMR_CM_MASK);
145
146 /* PCI1 IO space */
147 pci_pot[1].potar = (CFG_PCI1_IO_BASE >> 12) & POTAR_TA_MASK;
148 pci_pot[1].pobar = (CFG_PCI1_IO_PHYS >> 12) & POBAR_BA_MASK;
149 pci_pot[1].pocmr = POCMR_EN | POCMR_IO | (POCMR_CM_16M & POCMR_CM_MASK);
150
151 /*
152 * Configure PCI Inbound Translation Windows
153 */
154
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100155 /* we need RAM mapped to PCI space for the devices to
156 * access main memory */
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200157 pci_ctrl[0].pitar1 = 0x0;
158 pci_ctrl[0].pibar1 = 0x0;
159 pci_ctrl[0].piebar1 = 0x0;
Rafal Jaworowski5a164c82005-11-17 00:26:18 +0100160 pci_ctrl[0].piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | PIWAR_IWS_256M;
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200161
162 hose->first_busno = 0;
163 hose->last_busno = 0xff;
164
165 /* PCI memory space */
166 pci_set_region(hose->regions + 0,
167 CFG_PCI1_MEM_BASE,
168 CFG_PCI1_MEM_PHYS,
169 CFG_PCI1_MEM_SIZE,
170 PCI_REGION_MEM);
171
172 /* PCI IO space */
173 pci_set_region(hose->regions + 1,
174 CFG_PCI1_IO_BASE,
175 CFG_PCI1_IO_PHYS,
176 CFG_PCI1_IO_SIZE,
177 PCI_REGION_IO);
178
179 /* System memory space */
180 pci_set_region(hose->regions + 2,
181 CONFIG_PCI_SYS_MEM_BUS,
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100182 CONFIG_PCI_SYS_MEM_PHYS,
183 CONFIG_PCI_SYS_MEM_SIZE,
184 PCI_REGION_MEM | PCI_REGION_MEMORY);
185
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200186 hose->region_count = 3;
187
188 pci_setup_indirect(hose,
Timur Tabid239d742006-11-03 12:00:28 -0600189 (CFG_IMMR+0x8300),
190 (CFG_IMMR+0x8304));
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200191
192 pci_register_hose(hose);
193
194 /*
195 * Write to Command register
196 */
197 reg16 = 0xff;
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100198 pci_hose_read_config_word (hose, PCI_BDF(0,0,0), PCI_COMMAND,
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200199 &reg16);
200 reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100201 pci_hose_write_config_word(hose, PCI_BDF(0,0,0), PCI_COMMAND,
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200202 reg16);
203
204 /*
205 * Clear non-reserved bits in status register.
206 */
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100207 pci_hose_write_config_word(hose, PCI_BDF(0,0,0), PCI_STATUS,
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200208 0xffff);
Wolfgang Denkf013dac2005-12-04 00:40:34 +0100209 pci_hose_write_config_byte(hose, PCI_BDF(0,0,0), PCI_LATENCY_TIMER,
Rafal Jaworowski6902df52005-10-17 02:39:53 +0200210 0x80);
211
212#ifdef CONFIG_PCI_SCAN_SHOW
213 printf("PCI: Bus Dev VenId DevId Class Int\n");
214#endif
215 /*
216 * Hose scan.
217 */
218 hose->last_busno = pci_hose_scan(hose);
219}
220#endif /* CONFIG_PCI */