diff options
Diffstat (limited to 'src/soc/intel/apollolake')
| -rw-r--r-- | src/soc/intel/apollolake/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/apollolake/uart.c | 56 |
2 files changed, 57 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/Makefile.inc b/src/soc/intel/apollolake/Makefile.inc index 1b2efdf362..8581607934 100644 --- a/src/soc/intel/apollolake/Makefile.inc +++ b/src/soc/intel/apollolake/Makefile.inc @@ -32,6 +32,7 @@ ramstage-y += gpio.c ramstage-$(CONFIG_SOC_UART_DEBUG) += uart_early.c ramstage-y += memmap.c ramstage-y += mmap_boot.c +ramstage-y += uart.c CPPFLAGS_common += -I$(src)/soc/intel/apollolake/include diff --git a/src/soc/intel/apollolake/uart.c b/src/soc/intel/apollolake/uart.c new file mode 100644 index 0000000000..2a32842cb3 --- /dev/null +++ b/src/soc/intel/apollolake/uart.c @@ -0,0 +1,56 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2015 Intel Corp. + * + * 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; either version 2 of the License, or + * (at your option) any later version. + */ + +/* + * The sole purpose of this driver is to avoid BAR to be changed during + * resource allocation. Since configuration space is just 32 bytes it + * shouldn't cause any fragmentation. + */ + +#include <console/uart.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <soc/pci_ids.h> +#include <soc/pci_devs.h> + +static void aplk_uart_read_resources(struct device *dev) +{ + pci_dev_read_resources(dev); + + if ((IS_ENABLED(CONFIG_SOC_UART_DEBUG) && + dev->path.pci.devfn == _LPSS_PCI_DEVFN(UART, + CONFIG_UART_FOR_CONSOLE))) { + /* will override existing resource. */ + fixed_mem_resource(dev, PCI_BASE_ADDRESS_0, + CONFIG_CONSOLE_UART_BASE_ADDRESS >> 10, 4, 0); + } +} + +static struct device_operations uart_ops = { + .read_resources = aplk_uart_read_resources, + .set_resources = DEVICE_NOOP, + .enable_resources = DEVICE_NOOP, + .init = pci_dev_init, + .enable = DEVICE_NOOP +}; + +static const unsigned short uart_ids[] = { + PCI_DEVICE_ID_APOLLOLAKE_UART0, PCI_DEVICE_ID_APOLLOLAKE_UART1, + PCI_DEVICE_ID_APOLLOLAKE_UART2, PCI_DEVICE_ID_APOLLOLAKE_UART3, + 0 +}; + +static const struct pci_driver uart_driver __pci_driver = { + .ops = &uart_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .devices = uart_ids +}; |