125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Phytium SPI core controller PCI driver.
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*
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* Copyright (c) 2019-2021, Phytium Corporation.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/highmem.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/spi/spi.h>
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#include <linux/scatterlist.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/property.h>
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#include "spi-phytium.h"
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#define DRIVER_NAME "phytium_spi_pci"
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static int phytium_spi_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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struct phytium_spi *fts;
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int pci_bar = 0;
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int ret;
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fts = devm_kzalloc(&pdev->dev, sizeof(struct phytium_spi),
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GFP_KERNEL);
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if (!fts)
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return -ENOMEM;
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ret = pcim_enable_device(pdev);
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if (ret)
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return ret;
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ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
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if (ret) {
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dev_err(&pdev->dev, "pci iomap failed?\n");
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return ret;
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}
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fts->regs = pcim_iomap_table(pdev)[pci_bar];
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if (IS_ERR(fts->regs)) {
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dev_err(&pdev->dev, "SPI region map failed\n");
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return PTR_ERR(fts->regs);
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}
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fts->irq = pdev->irq;
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if (fts->irq < 0) {
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dev_err(&pdev->dev, "no irq resource?\n");
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return fts->irq; /* -ENXIO */
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}
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fts->bus_num = (u16)(pdev->devfn & 0x1);
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fts->max_freq = 48000000;
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fts->num_cs = 4;
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fts->global_cs = 1;
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ret = phytium_spi_add_host(&pdev->dev, fts);
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if (ret)
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return ret;
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pci_set_drvdata(pdev, fts);
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return 0;
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}
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static void phytium_spi_pci_remove(struct pci_dev *pdev)
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{
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struct phytium_spi *fts = pci_get_drvdata(pdev);
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phytium_spi_remove_host(fts);
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}
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#ifdef CONFIG_PM_SLEEP
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static int spi_suspend(struct device *dev)
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{
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struct spi_master *master = dev_get_drvdata(dev);
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struct phytium_spi *fts = spi_master_get_devdata(master);
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return phytium_spi_suspend_host(fts);
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}
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static int spi_resume(struct device *dev)
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{
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struct spi_master *master = dev_get_drvdata(dev);
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struct phytium_spi *fts = spi_master_get_devdata(master);
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return phytium_spi_resume_host(fts);
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}
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#endif
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static SIMPLE_DEV_PM_OPS(phytium_spi_pm_ops, spi_suspend, spi_resume);
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static const struct pci_device_id phytium_device_pci_tbl[] = {
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{ PCI_DEVICE(0x1db7, 0xdc2c) },
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{},
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};
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static struct pci_driver phytium_spi_pci_driver = {
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.name = DRIVER_NAME,
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.id_table = phytium_device_pci_tbl,
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.probe = phytium_spi_pci_probe,
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.remove = phytium_spi_pci_remove,
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.driver = {
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.pm = &phytium_spi_pm_ops,
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}
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};
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module_pci_driver(phytium_spi_pci_driver);
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MODULE_AUTHOR("Yiqun Zhang <zhangyiqun@phytium.com.cn>");
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MODULE_DESCRIPTION("PCI Driver for Phytium SPI controller core");
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MODULE_LICENSE("GPL v2");
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