Alexandru Gagniuc | 23211b0 | 2013-06-09 16:06:07 -0500 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> |
| 5 | * |
| 6 | * This program is free software: you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation, either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include <device/pci.h> |
| 21 | #include <device/pci_ids.h> |
| 22 | #include <console/console.h> |
| 23 | #include <device/pci.h> |
| 24 | #include <device/pci_ids.h> |
| 25 | #include <drivers/generic/ioapic/chip.h> |
| 26 | |
| 27 | #include "vx900.h" |
| 28 | #include "chip.h" |
| 29 | |
| 30 | /** |
Martin Roth | 543888d | 2015-01-06 10:20:42 -0700 | [diff] [blame] | 31 | * @file vx900/traf_ctrl.c |
Alexandru Gagniuc | 23211b0 | 2013-06-09 16:06:07 -0500 | [diff] [blame] | 32 | * |
| 33 | * STATUS: |
| 34 | * The same issues with the IOAPIC pointe in lpc.c also apply here. |
| 35 | * |
| 36 | * We need to check if the current PCIE lane configuration mechanism is sane. |
| 37 | */ |
| 38 | |
| 39 | /** |
| 40 | * \brief VX900: Set up the north module IOAPIC (for PCIE and VGA) |
| 41 | * |
| 42 | * Enable the IOAPIC in the south module, and properly set it up. |
| 43 | * \n |
| 44 | * This is the hardware specific initialization for the IOAPIC, and complements |
| 45 | * the setup done by the generic IOAPIC driver. In order for the IOAPIC to work |
| 46 | * properly, it _must_ be declared in devicetree.cb . |
| 47 | * \n |
| 48 | * We are assuming this is called before the drivers/generic/ioapic code, |
| 49 | * which should be the case if devicetree.cb is set up properly. |
| 50 | */ |
| 51 | static void vx900_north_ioapic_setup(device_t dev) |
| 52 | { |
| 53 | u8 base_val; |
| 54 | device_t ioapic; |
| 55 | ioapic_config_t *config; |
| 56 | /* Find the IOAPIC, and make sure it's set up correctly in devicetree.cb |
| 57 | * If it's not, then the generic ioapic driver will not set it up |
| 58 | * correctly, and the MP table will not be correctly generated */ |
| 59 | for (ioapic = dev->next; ioapic; ioapic = ioapic->next) { |
| 60 | if (ioapic->path.type == DEVICE_PATH_IOAPIC) |
| 61 | break; |
| 62 | } |
| 63 | /* You did put an IOAPIC in devicetree.cb, didn't you? */ |
| 64 | if (ioapic == 0) { |
| 65 | /* We don't have enough info to set up the IOAPIC */ |
| 66 | printk(BIOS_ERR, "ERROR: North module IOAPIC not found. " |
| 67 | "Check your devicetree.cb\n"); |
| 68 | return; |
| 69 | } |
| 70 | /* Found our IOAPIC, and it should not carry ISA interrupts */ |
| 71 | config = (ioapic_config_t *) ioapic->chip_info; |
| 72 | if (config->have_isa_interrupts) { |
| 73 | /* Umh, is this the right IOAPIC ? */ |
| 74 | printk(BIOS_ERR, "ERROR: North module IOAPIC should not carry " |
| 75 | "ISA interrupts.\n" "Check your devicetree.cb\n"); |
| 76 | printk(BIOS_ERR, "Will not initialize this IOAPIC.\n"); |
| 77 | return; |
| 78 | } |
| 79 | /* The base address of this IOAPIC _must_ |
| 80 | * be between 0xfec00000 and 0xfecfff00 |
| 81 | * be 256-byte aligned |
| 82 | */ |
Kevin Paul Herbert | bde6d30 | 2014-12-24 18:43:20 -0800 | [diff] [blame] | 83 | if ((config->base < (void *)0xfec0000 || config->base > (void *)0xfecfff00) |
| 84 | || (((uintptr_t)config->base & 0xff) != 0)) { |
Alexandru Gagniuc | 23211b0 | 2013-06-09 16:06:07 -0500 | [diff] [blame] | 85 | printk(BIOS_ERR, "ERROR: North module IOAPIC base should be " |
| 86 | "between 0xfec00000 and 0xfecfff00\n" |
| 87 | "and must be aligned to a 256-byte boundary, " |
Kevin Paul Herbert | bde6d30 | 2014-12-24 18:43:20 -0800 | [diff] [blame] | 88 | "but we found it at 0x%p\n", config->base); |
Alexandru Gagniuc | 23211b0 | 2013-06-09 16:06:07 -0500 | [diff] [blame] | 89 | return; |
| 90 | } |
| 91 | |
| 92 | printk(BIOS_DEBUG, "VX900 TRAF_CTR: Setting up the north module IOAPIC " |
Kevin Paul Herbert | bde6d30 | 2014-12-24 18:43:20 -0800 | [diff] [blame] | 93 | "at %p\n", config->base); |
Alexandru Gagniuc | 23211b0 | 2013-06-09 16:06:07 -0500 | [diff] [blame] | 94 | |
| 95 | /* First register of the IOAPIC base */ |
Kevin Paul Herbert | bde6d30 | 2014-12-24 18:43:20 -0800 | [diff] [blame] | 96 | base_val = (((uintptr_t)config->base) >> 8) & 0xff; |
Alexandru Gagniuc | 23211b0 | 2013-06-09 16:06:07 -0500 | [diff] [blame] | 97 | pci_write_config8(dev, 0x41, base_val); |
| 98 | /* Second register of the base. |
| 99 | * Bit[7] also enables the IOAPIC and bit[5] enables MSI cycles */ |
Kevin Paul Herbert | bde6d30 | 2014-12-24 18:43:20 -0800 | [diff] [blame] | 100 | base_val = (((uintptr_t)config->base) >> 16) & 0xf; |
Alexandru Gagniuc | 23211b0 | 2013-06-09 16:06:07 -0500 | [diff] [blame] | 101 | pci_mod_config8(dev, 0x40, 0, base_val | (1 << 7) | (1 << 5)); |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Configures the PCI-express ports |
| 106 | * |
| 107 | * FIXME: triple-quadruple-check this |
| 108 | */ |
| 109 | static void vx900_pex_link_setup(device_t dev) |
| 110 | { |
| 111 | u8 reg8; |
| 112 | struct northbridge_via_vx900_config *nb = (void *)dev->chip_info; |
| 113 | |
| 114 | reg8 = pci_read_config8(dev, 0xb0); |
| 115 | reg8 &= ~((1 << 7) | (1 << 3)); |
| 116 | |
| 117 | if (nb->assign_pex_to_dp) |
| 118 | reg8 |= (1 << 7); |
| 119 | |
| 120 | if (!nb->pcie_port1_2_lane_wide) |
| 121 | reg8 |= (1 << 3); |
| 122 | |
| 123 | pci_write_config8(dev, 0xb0, reg8); |
| 124 | } |
| 125 | |
| 126 | static void vx900_traf_ctr_init(device_t dev) |
| 127 | { |
| 128 | vx900_north_ioapic_setup(dev); |
| 129 | vx900_pex_link_setup(dev); |
| 130 | } |
| 131 | |
| 132 | static struct device_operations traf_ctrl_ops = { |
| 133 | .read_resources = pci_dev_read_resources, |
| 134 | .set_resources = pci_dev_set_resources, |
| 135 | .enable_resources = pci_dev_enable_resources, |
| 136 | .init = vx900_traf_ctr_init, |
Kyösti Mälkki | d0e212c | 2015-02-26 20:47:47 +0200 | [diff] [blame] | 137 | /* Need this here, or the IOAPIC driver won't be called. |
| 138 | * FIXME: Technically not a LPC bus. */ |
| 139 | .scan_bus = scan_lpc_bus, |
Alexandru Gagniuc | 23211b0 | 2013-06-09 16:06:07 -0500 | [diff] [blame] | 140 | }; |
| 141 | |
| 142 | static const struct pci_driver traf_ctrl_driver __pci_driver = { |
| 143 | .ops = &traf_ctrl_ops, |
| 144 | .vendor = PCI_VENDOR_ID_VIA, |
| 145 | .device = PCI_DEVICE_ID_VIA_VX900_TRAF, |
| 146 | }; |