1 /* 2 * Copyright (C) 2014 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <dm.h> 9 #include <errno.h> 10 #include <fdtdec.h> 11 #include <malloc.h> 12 #include <asm/lapic.h> 13 #include <asm/pci.h> 14 #include <asm/arch/bd82x6x.h> 15 #include <asm/arch/model_206ax.h> 16 #include <asm/arch/pch.h> 17 #include <asm/arch/sandybridge.h> 18 19 void bd82x6x_pci_init(pci_dev_t dev) 20 { 21 u16 reg16; 22 u8 reg8; 23 24 debug("bd82x6x PCI init.\n"); 25 /* Enable Bus Master */ 26 reg16 = x86_pci_read_config16(dev, PCI_COMMAND); 27 reg16 |= PCI_COMMAND_MASTER; 28 x86_pci_write_config16(dev, PCI_COMMAND, reg16); 29 30 /* This device has no interrupt */ 31 x86_pci_write_config8(dev, INTR, 0xff); 32 33 /* disable parity error response and SERR */ 34 reg16 = x86_pci_read_config16(dev, BCTRL); 35 reg16 &= ~(1 << 0); 36 reg16 &= ~(1 << 1); 37 x86_pci_write_config16(dev, BCTRL, reg16); 38 39 /* Master Latency Count must be set to 0x04! */ 40 reg8 = x86_pci_read_config8(dev, SMLT); 41 reg8 &= 0x07; 42 reg8 |= (0x04 << 3); 43 x86_pci_write_config8(dev, SMLT, reg8); 44 45 /* Will this improve throughput of bus masters? */ 46 x86_pci_write_config8(dev, PCI_MIN_GNT, 0x06); 47 48 /* Clear errors in status registers */ 49 reg16 = x86_pci_read_config16(dev, PSTS); 50 /* reg16 |= 0xf900; */ 51 x86_pci_write_config16(dev, PSTS, reg16); 52 53 reg16 = x86_pci_read_config16(dev, SECSTS); 54 /* reg16 |= 0xf900; */ 55 x86_pci_write_config16(dev, SECSTS, reg16); 56 } 57 58 #define PCI_BRIDGE_UPDATE_COMMAND 59 void bd82x6x_pci_dev_enable_resources(pci_dev_t dev) 60 { 61 uint16_t command; 62 63 command = x86_pci_read_config16(dev, PCI_COMMAND); 64 command |= PCI_COMMAND_IO; 65 #ifdef PCI_BRIDGE_UPDATE_COMMAND 66 /* 67 * If we write to PCI_COMMAND, on some systems this will cause the 68 * ROM and APICs to become invisible. 69 */ 70 debug("%x cmd <- %02x\n", dev, command); 71 x86_pci_write_config16(dev, PCI_COMMAND, command); 72 #else 73 printf("%s cmd <- %02x (NOT WRITTEN!)\n", dev_path(dev), command); 74 #endif 75 } 76 77 void bd82x6x_pci_bus_enable_resources(pci_dev_t dev) 78 { 79 uint16_t ctrl; 80 81 ctrl = x86_pci_read_config16(dev, PCI_BRIDGE_CONTROL); 82 ctrl |= PCI_COMMAND_IO; 83 ctrl |= PCI_BRIDGE_CTL_VGA; 84 debug("%x bridge ctrl <- %04x\n", dev, ctrl); 85 x86_pci_write_config16(dev, PCI_BRIDGE_CONTROL, ctrl); 86 87 bd82x6x_pci_dev_enable_resources(dev); 88 } 89 90 static int bd82x6x_probe(struct udevice *dev) 91 { 92 const void *blob = gd->fdt_blob; 93 struct pci_controller *hose; 94 struct x86_cpu_priv *cpu; 95 int sata_node, gma_node; 96 int ret; 97 98 hose = pci_bus_to_hose(0); 99 lpc_enable(PCH_LPC_DEV); 100 lpc_init(hose, PCH_LPC_DEV); 101 sata_node = fdtdec_next_compatible(blob, 0, 102 COMPAT_INTEL_PANTHERPOINT_AHCI); 103 if (sata_node < 0) { 104 debug("%s: Cannot find SATA node\n", __func__); 105 return -EINVAL; 106 } 107 bd82x6x_sata_init(PCH_SATA_DEV, blob, sata_node); 108 bd82x6x_usb_ehci_init(PCH_EHCI1_DEV); 109 bd82x6x_usb_ehci_init(PCH_EHCI2_DEV); 110 111 cpu = calloc(1, sizeof(*cpu)); 112 if (!cpu) 113 return -ENOMEM; 114 model_206ax_init(cpu); 115 116 gma_node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_GMA); 117 if (gma_node < 0) { 118 debug("%s: Cannot find GMA node\n", __func__); 119 return -EINVAL; 120 } 121 ret = gma_func0_init(PCH_VIDEO_DEV, pci_bus_to_hose(0), blob, 122 gma_node); 123 if (ret) 124 return ret; 125 126 return 0; 127 } 128 129 int bd82x6x_init(void) 130 { 131 const void *blob = gd->fdt_blob; 132 int sata_node; 133 134 sata_node = fdtdec_next_compatible(blob, 0, 135 COMPAT_INTEL_PANTHERPOINT_AHCI); 136 if (sata_node < 0) { 137 debug("%s: Cannot find SATA node\n", __func__); 138 return -EINVAL; 139 } 140 141 bd82x6x_pci_init(PCH_DEV); 142 bd82x6x_sata_enable(PCH_SATA_DEV, blob, sata_node); 143 northbridge_enable(PCH_DEV); 144 northbridge_init(PCH_DEV); 145 146 return 0; 147 } 148 149 static const struct udevice_id bd82x6x_ids[] = { 150 { .compatible = "intel,bd82x6x" }, 151 { } 152 }; 153 154 U_BOOT_DRIVER(bd82x6x_drv) = { 155 .name = "bd82x6x", 156 .id = UCLASS_PCH, 157 .of_match = bd82x6x_ids, 158 .probe = bd82x6x_probe, 159 }; 160