diff options
| author | Andrey Petrov <andrey.petrov@intel.com> | 2016-02-05 11:27:44 -0800 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-04-28 05:38:34 +0200 |
| commit | e976bd44692d2adb320a1256f1b6bfaa6469108a (patch) | |
| tree | 32321588165b81c5fd0c91c859b238df52086ee2 /src/soc/intel/apollolake/lpc.c | |
| parent | f748f83ecb389552e7afe10ce8837b5173534b96 (diff) | |
soc/intel/apollolake: Enable LPC bus interface
This adds early LPC setup in bootblock (for Chrome EC) as well as
late (ramstage) IO decode/sirq enable.
Change-Id: Ic270e66dbf07240229d4783f80e2ec02007c36c2
Signed-off-by: Divya Sasidharan <divya.s.sasidharan@intel.com>
Signed-off-by: Freddy Paul <freddy.paul@intel.com>
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/14469
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel/apollolake/lpc.c')
| -rw-r--r-- | src/soc/intel/apollolake/lpc.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/src/soc/intel/apollolake/lpc.c b/src/soc/intel/apollolake/lpc.c index 902ada2bba..6e366e095f 100644 --- a/src/soc/intel/apollolake/lpc.c +++ b/src/soc/intel/apollolake/lpc.c @@ -1,7 +1,7 @@ /* * This file is part of the coreboot project. * - * Copyright (C) 2016 Intel Corp. + * Copyright (C) 2015-2016 Intel Corp. * (Written by Lance Zhao <lijian.zhao@intel.com> for Intel Corp.) * * This program is free software; you can redistribute it and/or modify @@ -20,6 +20,46 @@ #include <device/pci_ids.h> #include <soc/acpi.h> #include <soc/pci_ids.h> +#include <reg_script.h> +#include <vendorcode/google/chromeos/chromeos.h> +#include <soc/lpc.h> +#include "chip.h" + +static const struct reg_script lpc_serirq_enable[] = { + /* Setup SERIRQ, enable continuous mode */ + REG_PCI_OR8(SERIRQ_CNTL, (1 << 7) | (1 << 6)), +#if !IS_ENABLED(CONFIG_SERIRQ_CONTINUOUS_MODE) + REG_PCI_RMW8(SERIRQ_CNTL, ~(1 << 6), 0), +#endif + REG_SCRIPT_END +}; + +static void enable_lpc_decode(struct device *lpc) +{ + const struct soc_intel_apollolake_config *config; + + if (!lpc || !lpc->chip_info) + return; + + config = lpc->chip_info; + + /* Enable requested fixed IO decode ranges */ + pci_write_config16(lpc, LPC_EN, config->lpc_dec); + + /* Enable generic IO decode ranges */ + pci_write_config32(lpc, LPC_GEN1_DEC, config->gen1_dec); + pci_write_config32(lpc, LPC_GEN2_DEC, config->gen2_dec); + pci_write_config32(lpc, LPC_GEN3_DEC, config->gen3_dec); + pci_write_config32(lpc, LPC_GEN4_DEC, config->gen4_dec); +} + + +static void lpc_init(struct device *dev) +{ + enable_lpc_decode(dev); + reg_script_run_on_dev(dev, lpc_serirq_enable); +} + static void soc_lpc_add_io_resources(device_t dev) { @@ -46,6 +86,7 @@ static struct device_operations device_ops = { .set_resources = &pci_dev_set_resources, .enable_resources = &pci_dev_enable_resources, .write_acpi_tables = southbridge_write_acpi_tables, + .init = &lpc_init }; static const struct pci_driver soc_lpc __pci_driver = { |