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https://github.com/zephyrproject-rtos/zephyr
synced 2025-08-27 22:35:20 +00:00
629805d881
Some firmwares (looking at you, slimbootloader) don't set the registers in PCI configuration space to indicate the IRQ routing, so we remove the check that verifies that the user and firmware agree on IRQ number. Also eliminate the return value of pcie_irq_enable() since no one uses it and we can't return a meaningful value any longer. Signed-off-by: Charles Youse <charles.youse@intel.com>
103 lines
1.7 KiB
C
103 lines
1.7 KiB
C
/*
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* Copyright (c) 2019 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <stdbool.h>
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#include <drivers/pcie/pcie.h>
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#if CONFIG_PCIE_MSI
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#include <drivers/pcie/msi.h>
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#endif
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/* functions documented in drivers/pcie/pcie.h */
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bool pcie_probe(pcie_bdf_t bdf, pcie_id_t id)
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{
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u32_t data;
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data = pcie_conf_read(bdf, PCIE_CONF_ID);
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if (data == PCIE_ID_NONE) {
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return false;
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}
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if (id == PCIE_ID_NONE) {
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return true;
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}
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return (id == data);
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}
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void pcie_set_cmd(pcie_bdf_t bdf, u32_t bits, bool on)
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{
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u32_t cmdstat;
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cmdstat = pcie_conf_read(bdf, PCIE_CONF_CMDSTAT);
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if (on) {
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cmdstat |= bits;
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} else {
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cmdstat &= ~bits;
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}
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pcie_conf_write(bdf, PCIE_CONF_CMDSTAT, cmdstat);
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}
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static u32_t pcie_get_bar(pcie_bdf_t bdf, unsigned int index, bool io)
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{
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int bar;
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u32_t data;
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for (bar = PCIE_CONF_BAR0; bar <= PCIE_CONF_BAR5; ++bar) {
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data = pcie_conf_read(bdf, bar);
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if (data == PCIE_CONF_BAR_NONE) {
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continue;
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}
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if ((PCIE_CONF_BAR_IO(data) && io) ||
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(PCIE_CONF_BAR_MEM(data) && !io)) {
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if (index == 0) {
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return PCIE_CONF_BAR_ADDR(data);
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}
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--index;
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}
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if (PCIE_CONF_BAR_64(data)) {
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++bar;
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}
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}
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return PCIE_CONF_BAR_NONE;
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}
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u32_t pcie_get_mbar(pcie_bdf_t bdf, unsigned int index)
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{
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return pcie_get_bar(bdf, index, false);
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}
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unsigned int pcie_wired_irq(pcie_bdf_t bdf)
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{
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u32_t data = pcie_conf_read(bdf, PCIE_CONF_INTR);
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return PCIE_CONF_INTR_IRQ(data);
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}
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u32_t pcie_get_iobar(pcie_bdf_t bdf, unsigned int index)
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{
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return pcie_get_bar(bdf, index, true);
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}
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void pcie_irq_enable(pcie_bdf_t bdf, unsigned int irq)
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{
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#if CONFIG_PCIE_MSI
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if (pcie_set_msi(bdf, irq)) {
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return;
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}
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#endif
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irq_enable(irq);
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}
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