9e627ed6d2
Fairly straightforward example of how to deal with PCIe. The code considers whether a particular instance is PCIe or not on a per-instance basis, so DEVICE_MMIO_ROM is not conditionally defined. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
86 lines
1.9 KiB
C
86 lines
1.9 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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* This file is a template for cmake and is not meant to be used directly!
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*/
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static void i2c_config_@NUM@(struct device *port);
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static const struct i2c_dw_rom_config i2c_config_dw_@NUM@ = {
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DEVICE_MMIO_ROM_INIT(@NUM@),
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.config_func = i2c_config_@NUM@,
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.bitrate = DT_INST_PROP(@NUM@, clock_frequency),
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#if DT_INST_PROP(@NUM@, pcie)
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.pcie = true,
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.pcie_bdf = DT_INST_REG_ADDR(@NUM@),
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.pcie_id = DT_INST_REG_SIZE(@NUM@),
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#endif
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};
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static struct i2c_dw_dev_config i2c_@NUM@_runtime;
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DEVICE_AND_API_INIT(i2c_@NUM@, DT_INST_LABEL(@NUM@),
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&i2c_dw_initialize,
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&i2c_@NUM@_runtime, &i2c_config_dw_@NUM@,
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POST_KERNEL, CONFIG_I2C_INIT_PRIORITY,
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&funcs);
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#if DT_INST_IRQ_HAS_CELL(@NUM@, sense)
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#define INST_@NUM@_IRQ_FLAGS DT_INST_IRQ(@NUM@, sense)
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#else
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#define INST_@NUM@_IRQ_FLAGS 0
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#endif
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static void i2c_config_@NUM@(struct device *port)
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{
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ARG_UNUSED(port);
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#if DT_INST_PROP(@NUM@, pcie)
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#if DT_INST_IRQN(@NUM@) == PCIE_IRQ_DETECT
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/* PCI(e) with auto IRQ detection */
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BUILD_ASSERT(IS_ENABLED(CONFIG_DYNAMIC_INTERRUPTS),
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"DW I2C PCI auto-IRQ needs CONFIG_DYNAMIC_INTERRUPTS");
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unsigned int irq;
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irq = pcie_wired_irq(DT_INST_REG_ADDR(@NUM@));
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if (irq == PCIE_CONF_INTR_IRQ_NONE) {
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return;
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}
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irq_connect_dynamic(irq,
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DT_INST_IRQ(@NUM@, priority),
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i2c_dw_isr, DEVICE_GET(i2c_@NUM@),
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INST_@NUM@_IRQ_FLAGS);
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pcie_irq_enable(DT_INST_REG_ADDR(@NUM@), irq);
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#else
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/* PCI(e) with fixed or MSI IRQ */
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IRQ_CONNECT(DT_INST_IRQN(@NUM@),
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DT_INST_IRQ(@NUM@, priority),
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i2c_dw_isr, DEVICE_GET(i2c_@NUM@),
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INST_@NUM@_IRQ_FLAGS);
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pcie_irq_enable(DT_INST_REG_ADDR(@NUM@),
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DT_INST_IRQN(@NUM@));
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#endif
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#else
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/* not PCI(e) */
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IRQ_CONNECT(DT_INST_IRQN(@NUM@),
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DT_INST_IRQ(@NUM@, priority),
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i2c_dw_isr, DEVICE_GET(i2c_@NUM@),
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INST_@NUM@_IRQ_FLAGS);
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irq_enable(DT_INST_IRQN(@NUM@));
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#endif
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}
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