2 * Copyright (C) 2009-2010 DENX Software Engineering <wd@denx.de>
3 * Copyright (C) Freescale Semiconductor, Inc. 2006, 2007.
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
28 #include <asm/global_data.h>
30 #if defined(CONFIG_OF_LIBFDT)
32 #include <fdt_support.h>
35 DECLARE_GLOBAL_DATA_PTR;
37 /* System RAM mapped to PCI space */
38 #define CONFIG_PCI_SYS_MEM_BUS CONFIG_SYS_SDRAM_BASE
39 #define CONFIG_PCI_SYS_MEM_PHYS CONFIG_SYS_SDRAM_BASE
41 static struct pci_controller pci_hose;
44 /**************************************************************************
51 volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
52 volatile law512x_t *pci_law;
53 volatile pot512x_t *pci_pot;
54 volatile pcictrl512x_t *pci_ctrl;
59 struct pci_controller *hose;
61 /* Set PCI divider for 33MHz */
62 reg32 = in_be32(&im->clk.scfr[0]);
63 reg32 &= ~(SCFR1_PCI_DIV_MASK);
64 reg32 |= SCFR1_PCI_DIV << SCFR1_PCI_DIV_SHIFT;
65 out_be32(&im->clk.scfr[0], reg32);
67 clrsetbits_be32(&im->clk.scfr[0],
69 SCFR1_PCI_DIV << SCFR1_PCI_DIV_SHIFT
72 pci_law = im->sysconf.pcilaw;
73 pci_pot = im->ios.pot;
74 pci_ctrl = &im->pci_ctrl;
79 * Release PCI RST Output signal
81 out_be32(&pci_ctrl->gcr, 0);
83 out_be32(&pci_ctrl->gcr, 1);
85 /* We need to wait at least a 1sec based on PCI specs */
86 for (i = 0; i < 1000; i++)
90 * Configure PCI Local Access Windows
92 out_be32(&pci_law[0].bar, CONFIG_SYS_PCI_MEM_PHYS & LAWBAR_BAR);
93 out_be32(&pci_law[0].ar, LAWAR_EN | LAWAR_SIZE_512M);
95 out_be32(&pci_law[1].bar, CONFIG_SYS_PCI_IO_PHYS & LAWBAR_BAR);
96 out_be32(&pci_law[1].ar, LAWAR_EN | LAWAR_SIZE_16M);
99 * Configure PCI Outbound Translation Windows
102 /* PCI mem space - prefetch */
103 out_be32(&pci_pot[0].potar,
104 (CONFIG_SYS_PCI_MEM_BASE >> 12) & POTAR_TA_MASK);
105 out_be32(&pci_pot[0].pobar,
106 (CONFIG_SYS_PCI_MEM_PHYS >> 12) & POBAR_BA_MASK);
107 out_be32(&pci_pot[0].pocmr,
108 POCMR_EN | POCMR_PRE | POCMR_CM_256M);
111 out_be32(&pci_pot[1].potar,
112 (CONFIG_SYS_PCI_IO_BASE >> 12) & POTAR_TA_MASK);
113 out_be32(&pci_pot[1].pobar,
114 (CONFIG_SYS_PCI_IO_PHYS >> 12) & POBAR_BA_MASK);
115 out_be32(&pci_pot[1].pocmr,
116 POCMR_EN | POCMR_IO | POCMR_CM_16M);
118 /* PCI mmio - non-prefetch mem space */
119 out_be32(&pci_pot[2].potar,
120 (CONFIG_SYS_PCI_MMIO_BASE >> 12) & POTAR_TA_MASK);
121 out_be32(&pci_pot[2].pobar,
122 (CONFIG_SYS_PCI_MMIO_PHYS >> 12) & POBAR_BA_MASK);
123 out_be32(&pci_pot[2].pocmr,
124 POCMR_EN | POCMR_CM_256M);
127 * Configure PCI Inbound Translation Windows
130 /* we need RAM mapped to PCI space for the devices to
131 * access main memory */
132 out_be32(&pci_ctrl[0].pitar1, 0x0);
133 out_be32(&pci_ctrl[0].pibar1, 0x0);
134 out_be32(&pci_ctrl[0].piebar1, 0x0);
135 out_be32(&pci_ctrl[0].piwar1,
136 PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
137 PIWAR_WTT_SNOOP | (__ilog2(gd->ram_size) - 1));
139 hose->first_busno = 0;
140 hose->last_busno = 0xff;
142 /* PCI memory prefetch space */
143 pci_set_region(hose->regions + 0,
144 CONFIG_SYS_PCI_MEM_BASE,
145 CONFIG_SYS_PCI_MEM_PHYS,
146 CONFIG_SYS_PCI_MEM_SIZE,
147 PCI_REGION_MEM|PCI_REGION_PREFETCH);
149 /* PCI memory space */
150 pci_set_region(hose->regions + 1,
151 CONFIG_SYS_PCI_MMIO_BASE,
152 CONFIG_SYS_PCI_MMIO_PHYS,
153 CONFIG_SYS_PCI_MMIO_SIZE,
157 pci_set_region(hose->regions + 2,
158 CONFIG_SYS_PCI_IO_BASE,
159 CONFIG_SYS_PCI_IO_PHYS,
160 CONFIG_SYS_PCI_IO_SIZE,
163 /* System memory space */
164 pci_set_region(hose->regions + 3,
165 CONFIG_PCI_SYS_MEM_BUS,
166 CONFIG_PCI_SYS_MEM_PHYS,
168 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
170 hose->region_count = 4;
172 pci_setup_indirect(hose,
173 (CONFIG_SYS_IMMR + 0x8300),
174 (CONFIG_SYS_IMMR + 0x8304));
176 pci_register_hose(hose);
179 * Write to Command register
182 dev = PCI_BDF(hose->first_busno, 0, 0);
183 pci_hose_read_config_word(hose, dev, PCI_COMMAND, ®16);
184 reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
185 pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
188 * Clear non-reserved bits in status register.
190 pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
191 pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
192 pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
194 #ifdef CONFIG_PCI_SCAN_SHOW
195 printf("PCI: Bus Dev VenId DevId Class Int\n");
200 hose->last_busno = pci_hose_scan(hose);
203 #if defined(CONFIG_OF_LIBFDT)
204 void ft_pci_setup(void *blob, bd_t *bd)
210 nodeoffset = fdt_path_offset(blob, "/aliases");
211 if (nodeoffset >= 0) {
212 path = fdt_getprop(blob, nodeoffset, "pci", NULL);
214 tmp[0] = cpu_to_be32(pci_hose.first_busno);
215 tmp[1] = cpu_to_be32(pci_hose.last_busno);
216 do_fixup_by_path(blob, path, "bus-range",
217 &tmp, sizeof(tmp), 1);
219 tmp[0] = cpu_to_be32(gd->pci_clk);
220 do_fixup_by_path(blob, path, "clock-frequency",
221 &tmp, sizeof(tmp[0]), 1);
225 #endif /* CONFIG_OF_LIBFDT */