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"
27 int (*setup)(struct dw_spi *);
32 static struct spi_pci_desc spi_pci_mid_desc_1 = {
33 .setup = dw_spi_mid_init,
38 static struct spi_pci_desc spi_pci_mid_desc_2 = {
39 .setup = dw_spi_mid_init,
44 static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
47 struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data;
51 ret = pcim_enable_device(pdev);
55 dws = devm_kzalloc(&pdev->dev, sizeof(*dws), GFP_KERNEL);
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];
70 * Specific handling for platforms, like dma setup,
71 * clock rate, FIFO depth.
74 dws->num_cs = desc->num_cs;
75 dws->bus_num = desc->bus_num;
78 ret = desc->setup(dws);
86 ret = dw_spi_add_host(&pdev->dev, dws);
90 /* PCI hook and SPI hook use the same drv data */
91 pci_set_drvdata(pdev, dws);
93 dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
94 pdev->vendor, pdev->device);
99 static void spi_pci_remove(struct pci_dev *pdev)
101 struct dw_spi *dws = pci_get_drvdata(pdev);
103 dw_spi_remove_host(dws);
106 #ifdef CONFIG_PM_SLEEP
107 static int spi_suspend(struct device *dev)
109 struct pci_dev *pdev = to_pci_dev(dev);
110 struct dw_spi *dws = pci_get_drvdata(pdev);
112 return dw_spi_suspend_host(dws);
115 static int spi_resume(struct device *dev)
117 struct pci_dev *pdev = to_pci_dev(dev);
118 struct dw_spi *dws = pci_get_drvdata(pdev);
120 return dw_spi_resume_host(dws);
124 static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume);
126 static const struct pci_device_id pci_ids[] = {
127 /* Intel MID platform SPI controller 0 */
129 * The access to the device 8086:0801 is disabled by HW, since it's
130 * exclusively used by SCU to communicate with MSIC.
132 /* Intel MID platform SPI controller 1 */
133 { PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1},
134 /* Intel MID platform SPI controller 2 */
135 { PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2},
139 static struct pci_driver dw_spi_driver = {
142 .probe = spi_pci_probe,
143 .remove = spi_pci_remove,
145 .pm = &dw_spi_pm_ops,
149 module_pci_driver(dw_spi_driver);
152 MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
153 MODULE_LICENSE("GPL v2");