2 * PCI interface driver for DW SPI Core
4 * Copyright (c) 2009, 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
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
20 #include <linux/interrupt.h>
21 #include <linux/pci.h>
22 #include <linux/slab.h>
23 #include <linux/spi/spi.h>
24 #include <linux/module.h>
28 #define DRIVER_NAME "dw_spi_pci"
35 static int __devinit spi_pci_probe(struct pci_dev *pdev,
36 const struct pci_device_id *ent)
38 struct dw_spi_pci *dwpci;
43 printk(KERN_INFO "DW: found PCI SPI controller(ID: %04x:%04x)\n",
44 pdev->vendor, pdev->device);
46 ret = pci_enable_device(pdev);
50 dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL);
59 /* Get basic io resource and map it */
60 dws->paddr = pci_resource_start(pdev, pci_bar);
61 dws->iolen = pci_resource_len(pdev, pci_bar);
63 ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev));
67 dws->regs = ioremap_nocache((unsigned long)dws->paddr,
68 pci_resource_len(pdev, pci_bar));
74 dws->parent_dev = &pdev->dev;
80 * Specific handling for Intel MID paltforms, like dma setup,
81 * clock rate, FIFO depth.
83 if (pdev->device == 0x0800) {
84 ret = dw_spi_mid_init(dws);
89 ret = dw_spi_add_host(dws);
93 /* PCI hook and SPI hook use the same drv data */
94 pci_set_drvdata(pdev, dwpci);
100 pci_release_region(pdev, pci_bar);
104 pci_disable_device(pdev);
108 static void __devexit spi_pci_remove(struct pci_dev *pdev)
110 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
112 pci_set_drvdata(pdev, NULL);
113 dw_spi_remove_host(&dwpci->dws);
114 iounmap(dwpci->dws.regs);
115 pci_release_region(pdev, 0);
117 pci_disable_device(pdev);
121 static int spi_suspend(struct pci_dev *pdev, pm_message_t state)
123 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
126 ret = dw_spi_suspend_host(&dwpci->dws);
129 pci_save_state(pdev);
130 pci_disable_device(pdev);
131 pci_set_power_state(pdev, pci_choose_state(pdev, state));
135 static int spi_resume(struct pci_dev *pdev)
137 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
140 pci_set_power_state(pdev, PCI_D0);
141 pci_restore_state(pdev);
142 ret = pci_enable_device(pdev);
145 return dw_spi_resume_host(&dwpci->dws);
148 #define spi_suspend NULL
149 #define spi_resume NULL
152 static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
153 /* Intel MID platform SPI controller 0 */
154 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) },
158 static struct pci_driver dw_spi_driver = {
161 .probe = spi_pci_probe,
162 .remove = __devexit_p(spi_pci_remove),
163 .suspend = spi_suspend,
164 .resume = spi_resume,
167 static int __init mrst_spi_init(void)
169 return pci_register_driver(&dw_spi_driver);
172 static void __exit mrst_spi_exit(void)
174 pci_unregister_driver(&dw_spi_driver);
177 module_init(mrst_spi_init);
178 module_exit(mrst_spi_exit);
181 MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
182 MODULE_LICENSE("GPL v2");