2 * PCI interface driver for DW SPI Core
4 * Copyright (c) 2009, 2014 Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 #include <linux/interrupt.h>
17 #include <linux/pci.h>
18 #include <linux/slab.h>
19 #include <linux/spi/spi.h>
20 #include <linux/module.h>
24 #define DRIVER_NAME "dw_spi_pci"
32 int (*setup)(struct dw_spi *);
35 static struct spi_pci_desc spi_pci_mid_desc = {
36 .setup = dw_spi_mid_init,
39 static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
41 struct dw_spi_pci *dwpci;
43 struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data;
47 ret = pcim_enable_device(pdev);
51 dwpci = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_pci),
59 /* Get basic io resource and map it */
60 dws->paddr = pci_resource_start(pdev, pci_bar);
62 ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
66 dws->regs = pcim_iomap_table(pdev)[pci_bar];
73 * Specific handling for paltforms, like dma setup,
74 * clock rate, FIFO depth.
76 if (desc && desc->setup) {
77 ret = desc->setup(dws);
82 ret = dw_spi_add_host(&pdev->dev, dws);
86 /* PCI hook and SPI hook use the same drv data */
87 pci_set_drvdata(pdev, dwpci);
89 dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
90 pdev->vendor, pdev->device);
95 static void spi_pci_remove(struct pci_dev *pdev)
97 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
99 dw_spi_remove_host(&dwpci->dws);
102 #ifdef CONFIG_PM_SLEEP
103 static int spi_suspend(struct device *dev)
105 struct pci_dev *pdev = to_pci_dev(dev);
106 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
108 return dw_spi_suspend_host(&dwpci->dws);
111 static int spi_resume(struct device *dev)
113 struct pci_dev *pdev = to_pci_dev(dev);
114 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
116 return dw_spi_resume_host(&dwpci->dws);
120 static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume);
122 static const struct pci_device_id pci_ids[] = {
123 /* Intel MID platform SPI controller 0 */
124 { PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc},
128 static struct pci_driver dw_spi_driver = {
131 .probe = spi_pci_probe,
132 .remove = spi_pci_remove,
134 .pm = &dw_spi_pm_ops,
138 module_pci_driver(dw_spi_driver);
140 MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
141 MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
142 MODULE_LICENSE("GPL v2");