xref: /openbmc/u-boot/board/sbc8349/pci.c (revision 400df309)
1 /*
2  * pci.c -- WindRiver SBC8349 PCI board support.
3  * Copyright (c) 2006 Wind River Systems, Inc.
4  * Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
5  *
6  * Based on MPC8349 PCI support but w/o PIB related code.
7  *
8  * SPDX-License-Identifier:	GPL-2.0+
9  */
10 
11 #include <asm/mmu.h>
12 #include <asm/io.h>
13 #include <common.h>
14 #include <mpc83xx.h>
15 #include <pci.h>
16 #include <i2c.h>
17 #include <asm/fsl_i2c.h>
18 
19 DECLARE_GLOBAL_DATA_PTR;
20 
21 static struct pci_region pci1_regions[] = {
22 	{
23 		bus_start: CONFIG_SYS_PCI1_MEM_BASE,
24 		phys_start: CONFIG_SYS_PCI1_MEM_PHYS,
25 		size: CONFIG_SYS_PCI1_MEM_SIZE,
26 		flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
27 	},
28 	{
29 		bus_start: CONFIG_SYS_PCI1_IO_BASE,
30 		phys_start: CONFIG_SYS_PCI1_IO_PHYS,
31 		size: CONFIG_SYS_PCI1_IO_SIZE,
32 		flags: PCI_REGION_IO
33 	},
34 	{
35 		bus_start: CONFIG_SYS_PCI1_MMIO_BASE,
36 		phys_start: CONFIG_SYS_PCI1_MMIO_PHYS,
37 		size: CONFIG_SYS_PCI1_MMIO_SIZE,
38 		flags: PCI_REGION_MEM
39 	},
40 };
41 
42 /*
43  * pci_init_board()
44  *
45  * NOTICE: PCI2 is not supported. There is only one
46  * physical PCI slot on the board.
47  *
48  */
49 void
50 pci_init_board(void)
51 {
52 	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
53 	volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
54 	volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
55 	struct pci_region *reg[] = { pci1_regions };
56 
57 	/* Enable all 8 PCI_CLK_OUTPUTS */
58 	clk->occr = 0xff000000;
59 	udelay(2000);
60 
61 	/* Configure PCI Local Access Windows */
62 	pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
63 	pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
64 
65 	pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
66 	pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
67 
68 	udelay(2000);
69 
70 	mpc83xx_pci_init(1, reg);
71 }
72