diff options
Diffstat (limited to 'src/soc/intel/apollolake/itss.c')
-rw-r--r-- | src/soc/intel/apollolake/itss.c | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/src/soc/intel/apollolake/itss.c b/src/soc/intel/apollolake/itss.c deleted file mode 100644 index 17b197547f..0000000000 --- a/src/soc/intel/apollolake/itss.c +++ /dev/null @@ -1,120 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2016 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 <commonlib/helpers.h> -#include <console/console.h> -#include <intelblocks/pcr.h> -#include <stdint.h> -#include <soc/itss.h> -#include <soc/pcr_ids.h> - -#define ITSS_MAX_IRQ 119 -#define IRQS_PER_IPC 32 -#define NUM_IPC_REGS ((ITSS_MAX_IRQ + IRQS_PER_IPC - 1)/IRQS_PER_IPC) -#define PCR_IPC0_CONF 0x3200 - -void itss_set_irq_polarity(int irq, int active_low) -{ - uint32_t mask; - uint16_t reg; - const uint16_t port = PID_ITSS; - - if (irq < 0 || irq > ITSS_MAX_IRQ) - return; - - reg = PCR_IPC0_CONF + sizeof(uint32_t) * (irq / IRQS_PER_IPC); - mask = 1 << (irq % IRQS_PER_IPC); - - pcr_rmw32(port, reg, ~mask, (active_low ? mask : 0)); -} - -static uint32_t irq_snapshot[NUM_IPC_REGS]; - -void itss_snapshot_irq_polarities(int start, int end) -{ - int i; - int reg_start; - int reg_end; - const uint16_t port = PID_ITSS; - - if (start < 0 || start > ITSS_MAX_IRQ || - end < 0 || end > ITSS_MAX_IRQ || end < start) - return; - - reg_start = start / IRQS_PER_IPC; - reg_end = (end + IRQS_PER_IPC - 1) / IRQS_PER_IPC; - - for (i = reg_start; i < reg_end; i++) { - uint16_t reg = PCR_IPC0_CONF + sizeof(uint32_t) * i; - irq_snapshot[i] = pcr_read32(port, reg); - } -} - -static void show_irq_polarities(const char *msg) -{ - int i; - const uint16_t port = PID_ITSS; - - printk(BIOS_INFO, "ITSS IRQ Polarities %s:\n", msg); - for (i = 0; i < NUM_IPC_REGS; i++) { - uint16_t reg = PCR_IPC0_CONF + sizeof(uint32_t) * i; - printk(BIOS_INFO, "IPC%d: 0x%08x\n", i, pcr_read32(port, reg)); - } -} - -void itss_restore_irq_polarities(int start, int end) -{ - int i; - int reg_start; - int reg_end; - const uint16_t port = PID_ITSS; - - if (start < 0 || start > ITSS_MAX_IRQ || - end < 0 || end > ITSS_MAX_IRQ || end < start) - return; - - show_irq_polarities("Before"); - - reg_start = start / IRQS_PER_IPC; - reg_end = (end + IRQS_PER_IPC - 1) / IRQS_PER_IPC; - - for (i = reg_start; i < reg_end; i++) { - uint32_t mask; - uint16_t reg; - int irq_start; - int irq_end; - - irq_start = i * IRQS_PER_IPC; - irq_end = MIN(irq_start + IRQS_PER_IPC - 1, ITSS_MAX_IRQ); - - if (start > irq_end) - continue; - if (end < irq_start) - break; - - /* Track bits within the bounds of of the register. */ - irq_start = MAX(start, irq_start) % IRQS_PER_IPC; - irq_end = MIN(end, irq_end) % IRQS_PER_IPC; - - /* Create bitmask of the inclusive range of start and end. */ - mask = (((1U << irq_end) - 1) | (1U << irq_end)); - mask &= ~((1U << irq_start) - 1); - - reg = PCR_IPC0_CONF + sizeof(uint32_t) * i; - pcr_rmw32(port, reg, ~mask, (mask & irq_snapshot[i])); - } - - show_irq_polarities("After"); -} |