1 /*
2 * pci.c -- esd VME8349 PCI board support.
3 * Copyright (c) 2006 Wind River Systems, Inc.
4 * Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
5 * Copyright (c) 2009 esd gmbh.
6 *
7 * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
8 *
9 * Based on MPC8349 PCI support but w/o PIB related code.
10 *
11 * SPDX-License-Identifier: GPL-2.0+
12 */
13
14 #include <asm/mmu.h>
15 #include <asm/io.h>
16 #include <common.h>
17 #include <mpc83xx.h>
18 #include <pci.h>
19 #include <i2c.h>
20 #include <asm/fsl_i2c.h>
21 #include "vme8349pin.h"
22
23 DECLARE_GLOBAL_DATA_PTR;
24
25 static struct pci_region pci1_regions[] = {
26 {
27 bus_start: CONFIG_SYS_PCI1_MEM_BASE,
28 phys_start: CONFIG_SYS_PCI1_MEM_PHYS,
29 size: CONFIG_SYS_PCI1_MEM_SIZE,
30 flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
31 },
32 {
33 bus_start: CONFIG_SYS_PCI1_IO_BASE,
34 phys_start: CONFIG_SYS_PCI1_IO_PHYS,
35 size: CONFIG_SYS_PCI1_IO_SIZE,
36 flags: PCI_REGION_IO
37 },
38 {
39 bus_start: CONFIG_SYS_PCI1_MMIO_BASE,
40 phys_start: CONFIG_SYS_PCI1_MMIO_PHYS,
41 size: CONFIG_SYS_PCI1_MMIO_SIZE,
42 flags: PCI_REGION_MEM
43 },
44 };
45
46 /*
47 * pci_init_board()
48 *
49 * NOTICE: PCI2 is not supported. There is only one
50 * physical PCI slot on the board.
51 *
52 */
53 void
pci_init_board(void)54 pci_init_board(void)
55 {
56 volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
57 volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
58 volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
59 struct pci_region *reg[] = { pci1_regions };
60 u8 reg8;
61 int monarch = 0;
62
63 i2c_set_bus_num(1);
64 /* Read the PCI_M66EN jumper setting */
65 if ((i2c_read(CONFIG_SYS_I2C_8574_ADDR2, 0, 0, ®8, 1) == 0) ||
66 (i2c_read(0x38 , 0, 0, ®8, 1) == 0)) {
67 if (reg8 & 0x40) {
68 clk->occr = 0xff000000; /* 66 MHz PCI */
69 printf("PCI: 66MHz\n");
70 } else {
71 clk->occr = 0xffff0003; /* 33 MHz PCI */
72 printf("PCI: 33MHz\n");
73 }
74 if (((reg8 & 0x01) == 0) || ((reg8 & 0x02) == 0))
75 monarch = 1;
76 } else {
77 clk->occr = 0xffff0003; /* 33 MHz PCI */
78 printf("PCI: 33MHz (I2C read failed)\n");
79 }
80 udelay(2000);
81
82 /*
83 * Assert/deassert VME reset
84 */
85 clrsetbits_be32(&immr->gpio[1].dat,
86 GPIO2_TSI_POWERUP_RESET_N | GPIO2_TSI_PLL_RESET_N,
87 GPIO2_VME_RESET_N | GPIO2_L_RESET_EN_N);
88 setbits_be32(&immr->gpio[1].dir, GPIO2_TSI_PLL_RESET_N |
89 GPIO2_TSI_POWERUP_RESET_N |
90 GPIO2_VME_RESET_N |
91 GPIO2_L_RESET_EN_N);
92 clrbits_be32(&immr->gpio[1].dir, GPIO2_V_SCON);
93 udelay(200);
94 setbits_be32(&immr->gpio[1].dat, GPIO2_TSI_PLL_RESET_N);
95 udelay(200);
96 setbits_be32(&immr->gpio[1].dat, GPIO2_TSI_POWERUP_RESET_N);
97 udelay(600000);
98 clrbits_be32(&immr->gpio[1].dat, GPIO2_L_RESET_EN_N);
99
100 /* Configure PCI Local Access Windows */
101 pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
102 pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
103
104 pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
105 pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
106
107 udelay(2000);
108
109 if (monarch == 0) {
110 mpc83xx_pci_init(1, reg);
111 } else {
112 /*
113 * Release PCI RST Output signal
114 */
115 out_be32(&immr->pci_ctrl[0].gcr, 0);
116 udelay(2000);
117 out_be32(&immr->pci_ctrl[0].gcr, 1);
118 }
119 }
120