diff options
Diffstat (limited to 'src/soc/intel/apollolake/lpc_lib.c')
| -rw-r--r-- | src/soc/intel/apollolake/lpc_lib.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/src/soc/intel/apollolake/lpc_lib.c b/src/soc/intel/apollolake/lpc_lib.c deleted file mode 100644 index 08a97b1f19..0000000000 --- a/src/soc/intel/apollolake/lpc_lib.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2016 Intel Corp. - * (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for 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. - * - * 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. - */ - -#define __SIMPLE_DEVICE__ - -#include <console/console.h> -#include <device/pci.h> -#include <lib.h> -#include <soc/gpio.h> -#include <soc/lpc.h> -#include <soc/pci_devs.h> - -/* - * These are MMIO ranges that the silicon designers decided are always going to - * be decoded to LPC. - */ -static const struct lpc_mmio_range { - uintptr_t base; - size_t size; -} lpc_fixed_mmio_ranges[] = { - { 0xfed40000, 0x8000 }, - { 0xfedc0000, 0x4000 }, - { 0xfed20800, 16 }, - { 0xfed20880, 8 }, - { 0xfed208e0, 16 }, - { 0xfed208f0, 8 }, - { 0xfed30800, 16 }, - { 0xfed30880, 8 }, - { 0xfed308e0, 16 }, - { 0xfed308f0, 8 }, - { 0, 0 } -}; - -static const struct pad_config lpc_gpios[] = { -#if IS_ENABLED(CONFIG_SOC_INTEL_GLK) - PAD_CFG_NF(GPIO_147, UP_20K, DEEP, NF1), /* LPC_ILB_SERIRQ */ - PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_148, UP_20K, DEEP, NF1, HIZCRx1, - DISPUPD), /* LPC_CLKOUT0 */ - PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_149, UP_20K, DEEP, NF1, HIZCRx1, - DISPUPD), /* LPC_CLKOUT1 */ - PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_150, UP_20K, DEEP, NF1, HIZCRx1, - DISPUPD), /* LPC_AD0 */ - PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_151, UP_20K, DEEP, NF1, HIZCRx1, - DISPUPD), /* LPC_AD1 */ - PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_152, UP_20K, DEEP, NF1, HIZCRx1, - DISPUPD), /* LPC_AD2 */ - PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_153, UP_20K, DEEP, NF1, HIZCRx1, - DISPUPD), /* LPC_AD3 */ - PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_154, UP_20K, DEEP, NF1, HIZCRx1, - DISPUPD), /* LPC_CLKRUNB */ - PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_155, UP_20K, DEEP, NF1, HIZCRx1, - DISPUPD), /* LPC_FRAMEB*/ -#else - PAD_CFG_NF(LPC_ILB_SERIRQ, UP_20K, DEEP, NF1), - PAD_CFG_NF(LPC_CLKRUNB, UP_20K, DEEP, NF1), - PAD_CFG_NF(LPC_AD0, UP_20K, DEEP, NF1), - PAD_CFG_NF(LPC_AD1, UP_20K, DEEP, NF1), - PAD_CFG_NF(LPC_AD2, UP_20K, DEEP, NF1), - PAD_CFG_NF(LPC_AD3, UP_20K, DEEP, NF1), - PAD_CFG_NF(LPC_FRAMEB, NATIVE, DEEP, NF1), - PAD_CFG_NF(LPC_CLKOUT0, UP_20K, DEEP, NF1), - PAD_CFG_NF(LPC_CLKOUT1, UP_20K, DEEP, NF1) -#endif -}; - -void lpc_configure_pads(void) -{ - gpio_configure_pads(lpc_gpios, ARRAY_SIZE(lpc_gpios)); -} - -void lpc_enable_fixed_io_ranges(uint16_t io_enables) -{ - uint16_t reg_io_enables; - - reg_io_enables = pci_read_config16(PCH_DEV_LPC, REG_IO_ENABLES); - io_enables |= reg_io_enables; - pci_write_config16(PCH_DEV_LPC, REG_IO_ENABLES, io_enables); -} - -/* - * Find the first unused IO window. - * Returns -1 if not found, 0 for reg 0x84, 1 for reg 0x88 ... - */ -static int find_unused_pmio_window(void) -{ - int i; - uint32_t lgir; - - for (i = 0; i < NUM_GENERIC_IO_RANGES; i++) { - lgir = pci_read_config32(PCH_DEV_LPC, REG_GENERIC_IO_RANGE(i)); - - if (!(lgir & LGIR_EN)) - return i; - } - - return -1; -} - -void lpc_close_pmio_windows(void) -{ - size_t i; - - for (i = 0; i < NUM_GENERIC_IO_RANGES; i++) - pci_write_config32(PCH_DEV_LPC, REG_GENERIC_IO_RANGE(i), 0); -} - -void lpc_open_pmio_window(uint16_t base, uint16_t size) -{ - int lgir_reg_num; - uint32_t lgir_reg_offset, lgir, window_size, alignment; - resource_t bridged_size, bridge_base; - - printk(BIOS_SPEW, "LPC: Trying to open IO window from %x size %x\n", - base, size); - - bridged_size = 0; - bridge_base = base; - - while (bridged_size < size) { - lgir_reg_num = find_unused_pmio_window(); - if (lgir_reg_num < 0) { - printk(BIOS_ERR, - "LPC: Cannot open IO window: %llx size %llx\n", - bridge_base, size - bridged_size); - printk(BIOS_ERR, "No more IO windows\n"); - return; - } - lgir_reg_offset = REG_GENERIC_IO_RANGE(lgir_reg_num); - - /* Each IO range register can only open a 256-byte window. */ - window_size = MIN(size, LGIR_MAX_WINDOW_SIZE); - - /* Window size must be a power of two for the AMASK to work. */ - alignment = 1 << (log2_ceil(window_size)); - window_size = ALIGN_UP(window_size, alignment); - - /* Address[15:2] in LGIR[15:12] and Mask[7:2] in LGIR[23:18]. */ - lgir = (bridge_base & LGIR_ADDR_MASK) | LGIR_EN; - lgir |= ((window_size - 1) << 16) & LGIR_AMASK_MASK; - - pci_write_config32(PCH_DEV_LPC, lgir_reg_offset, lgir); - - printk(BIOS_DEBUG, - "LPC: Opened IO window LGIR%d: base %llx size %x\n", - lgir_reg_num, bridge_base, window_size); - - bridged_size += window_size; - bridge_base += window_size; - } -} - -void lpc_open_mmio_window(uintptr_t base, size_t size) -{ - uint32_t lgmr; - - lgmr = pci_read_config32(PCH_DEV_LPC, REG_GENERIC_MEM_RANGE); - - if (lgmr & LGMR_EN) { - printk(BIOS_ERR, - "LPC: Cannot open window to resource %lx size %zx\n", - base, size); - printk(BIOS_ERR, "LPC: MMIO window already in use\n"); - return; - } - - if (size > LGMR_WINDOW_SIZE) { - printk(BIOS_WARNING, - "LPC: Resource %lx size %zx larger than window(%x)\n", - base, size, LGMR_WINDOW_SIZE); - } - - lgmr = (base & LGMR_ADDR_MASK) | LGMR_EN; - - pci_write_config32(PCH_DEV_LPC, REG_GENERIC_MEM_RANGE, lgmr); -} - -bool lpc_fits_fixed_mmio_window(uintptr_t base, size_t size) -{ - resource_t res_end, range_end; - const struct lpc_mmio_range *range; - - for (range = lpc_fixed_mmio_ranges; range->size; range++) { - range_end = range->base + range->size; - res_end = base + size; - - if ((base >= range->base) && (res_end <= range_end)) { - printk(BIOS_DEBUG, - "Resource %lx size %zx fits in fixed window" - " %lx size %zx\n", - base, size, range->base, range->size); - return true; - } - } - return false; -} |