1 /* 2 * Copyright (C) 2006-2009 Freescale Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <asm/mmu.h> 8 #include <asm/io.h> 9 #include <common.h> 10 #include <mpc83xx.h> 11 #include <pci.h> 12 #include <i2c.h> 13 #include <fdt_support.h> 14 #include <asm/fsl_i2c.h> 15 #include <asm/fsl_mpc83xx_serdes.h> 16 17 static struct pci_region pci_regions[] = { 18 { 19 bus_start: CONFIG_SYS_PCI_MEM_BASE, 20 phys_start: CONFIG_SYS_PCI_MEM_PHYS, 21 size: CONFIG_SYS_PCI_MEM_SIZE, 22 flags: PCI_REGION_MEM | PCI_REGION_PREFETCH 23 }, 24 { 25 bus_start: CONFIG_SYS_PCI_MMIO_BASE, 26 phys_start: CONFIG_SYS_PCI_MMIO_PHYS, 27 size: CONFIG_SYS_PCI_MMIO_SIZE, 28 flags: PCI_REGION_MEM 29 }, 30 { 31 bus_start: CONFIG_SYS_PCI_IO_BASE, 32 phys_start: CONFIG_SYS_PCI_IO_PHYS, 33 size: CONFIG_SYS_PCI_IO_SIZE, 34 flags: PCI_REGION_IO 35 } 36 }; 37 38 static struct pci_region pcie_regions_0[] = { 39 { 40 .bus_start = CONFIG_SYS_PCIE1_MEM_BASE, 41 .phys_start = CONFIG_SYS_PCIE1_MEM_PHYS, 42 .size = CONFIG_SYS_PCIE1_MEM_SIZE, 43 .flags = PCI_REGION_MEM, 44 }, 45 { 46 .bus_start = CONFIG_SYS_PCIE1_IO_BASE, 47 .phys_start = CONFIG_SYS_PCIE1_IO_PHYS, 48 .size = CONFIG_SYS_PCIE1_IO_SIZE, 49 .flags = PCI_REGION_IO, 50 }, 51 }; 52 53 static struct pci_region pcie_regions_1[] = { 54 { 55 .bus_start = CONFIG_SYS_PCIE2_MEM_BASE, 56 .phys_start = CONFIG_SYS_PCIE2_MEM_PHYS, 57 .size = CONFIG_SYS_PCIE2_MEM_SIZE, 58 .flags = PCI_REGION_MEM, 59 }, 60 { 61 .bus_start = CONFIG_SYS_PCIE2_IO_BASE, 62 .phys_start = CONFIG_SYS_PCIE2_IO_PHYS, 63 .size = CONFIG_SYS_PCIE2_IO_SIZE, 64 .flags = PCI_REGION_IO, 65 }, 66 }; 67 68 static int is_pex_x2(void) 69 { 70 const char *pex_x2 = env_get("pex_x2"); 71 72 if (pex_x2 && !strcmp(pex_x2, "yes")) 73 return 1; 74 return 0; 75 } 76 77 void pci_init_board(void) 78 { 79 volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR; 80 volatile sysconf83xx_t *sysconf = &immr->sysconf; 81 volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk; 82 volatile law83xx_t *pci_law = immr->sysconf.pcilaw; 83 volatile law83xx_t *pcie_law = sysconf->pcielaw; 84 struct pci_region *reg[] = { pci_regions }; 85 struct pci_region *pcie_reg[] = { pcie_regions_0, pcie_regions_1, }; 86 u32 spridr = in_be32(&immr->sysconf.spridr); 87 int pex2 = is_pex_x2(); 88 89 if (board_pci_host_broken()) 90 goto skip_pci; 91 92 /* Enable all 5 PCI_CLK_OUTPUTS */ 93 clk->occr |= 0xf8000000; 94 udelay(2000); 95 96 /* Configure PCI Local Access Windows */ 97 pci_law[0].bar = CONFIG_SYS_PCI_MEM_PHYS & LAWBAR_BAR; 98 pci_law[0].ar = LBLAWAR_EN | LBLAWAR_512MB; 99 100 pci_law[1].bar = CONFIG_SYS_PCI_IO_PHYS & LAWBAR_BAR; 101 pci_law[1].ar = LBLAWAR_EN | LBLAWAR_1MB; 102 103 udelay(2000); 104 105 mpc83xx_pci_init(1, reg); 106 skip_pci: 107 /* There is no PEX in MPC8379 parts. */ 108 if (PARTID_NO_E(spridr) == SPR_8379) 109 return; 110 111 if (pex2) 112 fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX_X2, 113 FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V); 114 else 115 fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX, 116 FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V); 117 118 /* Configure the clock for PCIE controller */ 119 clrsetbits_be32(&clk->sccr, SCCR_PCIEXP1CM | SCCR_PCIEXP2CM, 120 SCCR_PCIEXP1CM_1 | SCCR_PCIEXP2CM_1); 121 122 /* Deassert the resets in the control register */ 123 out_be32(&sysconf->pecr1, 0xE0008000); 124 if (!pex2) 125 out_be32(&sysconf->pecr2, 0xE0008000); 126 udelay(2000); 127 128 /* Configure PCI Express Local Access Windows */ 129 out_be32(&pcie_law[0].bar, CONFIG_SYS_PCIE1_BASE & LAWBAR_BAR); 130 out_be32(&pcie_law[0].ar, LBLAWAR_EN | LBLAWAR_512MB); 131 132 out_be32(&pcie_law[1].bar, CONFIG_SYS_PCIE2_BASE & LAWBAR_BAR); 133 out_be32(&pcie_law[1].ar, LBLAWAR_EN | LBLAWAR_512MB); 134 135 mpc83xx_pcie_init(pex2 ? 1 : 2, pcie_reg); 136 } 137 138 void ft_pcie_fixup(void *blob, bd_t *bd) 139 { 140 const char *status = "disabled (PCIE1 is x2)"; 141 142 if (!is_pex_x2()) 143 return; 144 145 do_fixup_by_path(blob, "pci2", "status", status, 146 strlen(status) + 1, 1); 147 } 148