/* * This file is part of the coreboot project. * * Copyright (C) 2011 Google Inc * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <stdint.h> #include <stddef.h> #include <device/pci_ops.h> #include <arch/early_variables.h> #include <boot/coreboot_tables.h> #include <console/uart.h> #include <device/pci.h> #include <device/pci_def.h> static unsigned int oxpcie_present CAR_GLOBAL; static DEVTREE_CONST u32 uart0_base = CONFIG_EARLY_PCI_MMIO_BASE + 0x1000; int pci_early_device_probe(u8 bus, u8 dev, u32 mmio_base) { pci_devfn_t device = PCI_DEV(bus, dev, 0); u32 id = pci_s_read_config32(device, PCI_VENDOR_ID); switch (id) { case 0xc1181415: /* e.g. Startech PEX1S1PMINI function 0 */ /* On this device function 0 is the parallel port, and * function 3 is the serial port. So let's go look for * the UART. */ device = PCI_DEV(bus, dev, 3); id = pci_s_read_config32(device, PCI_VENDOR_ID); if (id != 0xc11b1415) return -1; break; case 0xc11b1415: /* e.g. Startech PEX1S1PMINI function 3 */ case 0xc1581415: /* e.g. Startech MPEX2S952 */ break; default: /* No UART here. */ return -1; } /* Sanity-check, we assume fixed location. */ if (mmio_base != CONFIG_EARLY_PCI_MMIO_BASE) return -1; /* Setup base address on device */ pci_s_write_config32(device, PCI_BASE_ADDRESS_0, mmio_base); /* Enable memory on device */ u16 reg16 = pci_s_read_config16(device, PCI_COMMAND); reg16 |= PCI_COMMAND_MEMORY; pci_s_write_config16(device, PCI_COMMAND, reg16); car_set_var(oxpcie_present, 1); return 0; } static int oxpcie_uart_active(void) { return (car_get_var(oxpcie_present)); } uintptr_t uart_platform_base(int idx) { if ((idx >= 0) && (idx < 8) && oxpcie_uart_active()) return uart0_base + idx * 0x200; return 0; } void oxford_remap(u32 new_base) { #if ENV_RAMSTAGE uart0_base = new_base + 0x1000; #endif } unsigned int uart_platform_refclk(void) { return 62500000; }